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Применить Всего найдено 48. Отображено 48.
07-08-2018 дата публикации

METHOD FOR PAINT THICKNESS DISTRIBUTION VISUALIZATION AND ACTIVE THERMAL IMAGING DEVICE FOR SAME

Номер: KR101877480B1
Автор: SOHN HOON, HWANG SOON KYU, PARK JI HO
Принадлежит: KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY

Disclosed are a method for paint thickness distribution visualization, and an active thermal imaging device for the same. A heating unit performs heating by light beam application while moving relative to a measurement target region of a measurement structure. A measurement unit and the heating unit scan and image the heated measurement target region and generate multiple thermal images related to thermal energy propagation in the measurement target region. Coordinate transformation is performed in accordance with a time-space integrated coordinate transformation algorithm and the dynamic multiple thermal images are transformed into a static time-space integrated thermal image. The thickness of the paint layer can be calculated by using a Fourier thermal conductivity equation. The pre-heating time-space integrated thermal image is subtracted from the transformed time-space integrated thermal image for removal of noise attributable to an external heat source. Also removed are, for example ...

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Номер записи: 1
02-05-2016 дата публикации

METHOD AND SYSTEM FOR DIAGNOSING STRUCTURE

Номер: KR1020160047441A
Автор: SOHN, HOON, LIU PEIPEI, YANG, SU YOUNG
Принадлежит:

In a method for diagnosing a structure, a sensing unit receives an ultrasonic signal generated from a target structure by a laser beam. A control unit calculates a number of total peak points in an ultrasonic frequency spectrum generated based on the ultrasonic signal, and calculates a number of threshold peak points which are larger than or equal to a threshold value among the number of total peak points. The control unit determines whether the target structure is damaged based on the number of total peak points and the number of threshold peak points. The method for diagnosing a structure according to embodiments of the present invention uses the number of total peak points and the number of threshold peak points in the frequency spectrum of the ultrasonic signal generated from the target structure to determine whether the target structure is damaged to increase accuracy of structure diagnosis. COPYRIGHT KIPO 2016 ...

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Номер записи: 2
29-05-2017 дата публикации

SYSTEM AND METHOD FOR PREDICTING STRUCTURAL COLLAPSE USING THROWING SENSOR

Номер: KR1020170058520A
Автор: SOHN, HOON, KIM, MIN KOO, YOON, SEONG HEUM
Принадлежит:

A system for predicting a structural collapse using a throwing sensor includes at least one throwing sensor configured to measure a collapse characteristics of the structure by being thrown directly on a structure in the field, and wirelessly transmit the measured data; and a computer configured to receive the measured data transmitted from at least one throwing sensor, and fuse the received measured data to predict whether the structure is to be collapsed. COPYRIGHT KIPO 2017 ...

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Номер записи: 3
24-12-2018 дата публикации

프리캐스트 콘크리트의 보강용 철근 위치 검출 방법 및 이의 검출 장치

Номер: KR0101932227B1
Автор: 손훈, 왕치엔
Принадлежит: 한국과학기술원

... 프리캐스트 콘크리트의 보강용 철근 위치 검출 방법은 프리캐스트 콘크리트에 레이저를 조사하여 색상 정보 및 기하학 정보를 포함하는 스캔 데이터를 출력하고, 기하학 정보와 색상 정보에 기초하여 스캔 데이터에서 혼합 픽셀을 제거한 유효 스캔 데이터를 생성하며, 유효 스캔 데이터로부터 보강용 철근(rebar)들을 나타내는 데이터인 철근 스캔 데이터를 추출하고, 철근 스캔 데이터를 영역 성장(region growing) 방식을 이용하여 복수의 세그먼트(segment)들로 분할하고 세그먼트들을 평가하여 보강용 철근들 각각에 대응하는 유효 세그먼트들을 선택하여 출력한 후, 유효 세그먼트들과 프리캐스트 콘크리트의 기 설정된 설계 모델을 비교하여 보강용 철근들 각각의 위치를 산출할 수 있다.

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Номер записи: 4
12-09-2018 дата публикации

텐던 긴장력 모니터링용 센서와 이를 이용한 텐던의 긴장력 진단 시스템

Номер: KR0101896915B1
Автор: 손훈, 이준, 김지민
Принадлежит: 한국과학기술원

... 와전류 센서 장치는 코일부와 케이싱을 포함한다. 코일부는, 제1 자기장을 발생시키기 위한 여자 코일과, 제1 자기장에 의해 타겟 구조물에 유도된 와전류가 발생시키는 제2 자기장과 상기 제1 자기장의 합성 자기장에 상응하는 전기신호를 검출하는 센싱 코일을 포함한다. 케이싱은 상기 코일부를 내부에 수용하면서 둘러싸서 외부와 차단한다. 케이싱의 내부에 수납 고정되어 케이싱과 코일부를 타겟 구조물에 자력으로 고정시키기 위한 자력부를 더 포함할 수 있다. 긴장력에 기초하여 변동하는 응력을 제공하는 텐던의 긴장력을 텐던과 앵커헤드 사이에 압입되어 텐던의 응력에 따라 자기투자율이 변하는 적어도 하나의 쐐기의 표면에 와전류 센서가 설치된다. 긴장력 모니터링부는 와전류 센서에 여자 신호를 제공하는 한편, 와전류 센서가 검출한 전기신호를 이용하여 텐던의 긴장력에 관한 정보를 산출한다. 산출된 긴장력이 허용 임계값 이하로 떨어지면 위험 경보를 자동으로 발한다. 검사차량에서 자기유도방식으로 긴장력 모니터링부로 구동 전력을 제공하고 그 긴장력 모니터링부로부터 와전류 센서가 계측한 텐던 긴장력 정보를 수집할 수 있다.

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Номер записи: 5
07-04-2017 дата публикации

구조물 진단 시스템 및 구조물 진단 시스템의 동작 방법

Номер: KR0101724511B1
Автор: 손훈, 김지민, 이준
Принадлежит: 한국과학기술원

... 구조물 진단 시스템은 파형 발생기, 센서, 타겟 구조물 및 디지타이저를 포함한다. 파형 발생기는 송신 제어 신호에 기초하여 미리 정해진 주파수를 갖는 익사이테이션 신호를 제공한다. 센서는 익사이테이션 신호에 기초하여 제1 자기장을 제공한다. 타겟 구조물은 제1 자기장에 따라 와전류를 생성하고, 와전류에 기초하여 생성되는 제2 자기장을 센서에 제공한다. 디지타이저는 제2 자기장에 상응하는 전압 신호를 디지털화하여 디지털 전압 신호를 제공한다. 본 발명의 실시예들에 따른 구조물 진단 시스템은 센서로부터 생성되는 제1 자기장에 따라 타겟 구조물에 와전류를 생성하고, 와전류에 기초하여 생성되는 제2 자기장을 센서에 제공함으로써 성능을 향상시킬 수 있다.

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Номер записи: 6
24-01-2017 дата публикации

DYNAMIC DISPLACEMENT CALCULATING DEVICE AND METHOD OF CALCULATING DYNAMIC DISPLACEMENT

Номер: KR1020170008410A
Автор: SOHN, HOON, KIM, KI YOUNG
Принадлежит:

Disclosed is a dynamic displacement calculating device comprising an acceleration measuring device, a displacement measuring device, a Kalman filter part and a calculation part. The acceleration measuring device measures acceleration and angular displacement of a target object. The displacement measuring device measures dynamic displacement of the target object. The Kalman filter part calculates a speed of the target object and correction dynamic displacement based on acceleration, angular displacement and dynamic displacement and calculates a bias value included in the acceleration based on the speed and the correction dynamic displacement. The calculation part provides final dynamic displacement based on the correction dynamic displacement and the bias value. According to embodiments of the present invention, the dynamic displacement calculating device calculates the speed of the target object, which is determined in accordance with acceleration, angular displacement and dynamic displacement ...

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Номер записи: 7
16-05-2017 дата публикации

동적 변위 계산 장치 및 동적 변위 계산 방법

Номер: KR0101736133B1
Автор: 손훈, 김기영
Принадлежит: 한국과학기술원

... 동적 변위 계산 장치는 가속도 측정기, 변위 측정기, 칼만 필터부 및 연산부를 포함한다. 가속도 측정기는 타겟 물체의 가속도 및 각도 변위를 측정한다. 변위 측정기는 타겟 물체의 동적 변위를 측정한다. 칼만 필터부는 가속도, 각도 변위 및 동적 변위에 기초하여 타겟 물체의 속도 및 보정 동적 변위를 계산하고, 속도 및 보정 동적 변위에 기초하여 가속도에 포함되는 바이어스 값을 계산한다. 연산부는 보정 동적 변위 및 바이어스 값에 기초하여 최종 동적 변위를 제공한다. 본 발명의 실시예들에 따른 동적 변위 계산 장치는 타겟 물체의 가속도, 각도 변위 및 동적 변위에 따라 결정되는 타겟 물체의 속도 및 보정 동적 변위에 기초하여 가속도에 포함되는 바이어스 값을 계산함으로써 보다 정확한 동적 변위에 해당하는 최종 동적 변위를 제공할 수 있다.

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Номер записи: 8
21-02-2017 дата публикации

STRUCTURE DIAGNOSIS SYSTEM AND METHOD OF OPERATING SAME

Номер: KR1020170019046A
Автор: SOHN, HOON, KIM, JI MIN, LEE, JUN
Принадлежит:

A structure diagnosis system comprises: a waveform generator which provides an excitation signal having a predetermined frequency based on a transmission control signal; a sensor which provides a first magnetic field based on the excitation signal; a target structure which generates eddy current in accordance with the first magnetic field and provides a second magnetic field generated based on the eddy current; and a digitizer which digitizes a voltage signal corresponding to the second magnetic field and provides a digital voltage signal. According to embodiments of the present invention, the structure diagnosis system generates eddy current to the target structure in accordance with the first magnetic field generated by the sensor and provides the second magnetic field, generated based on the eddy current, to the sensor. Therefore, the structure diagnosis system can enhance performance. COPYRIGHT KIPO 2017 ...

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Номер записи: 9
04-09-2015 дата публикации

Apparatus and method of precast concrete quality control using 3D laser scanning

Номер: KR0101547099B1
Автор: 손훈, 김민구
Принадлежит: 한국과학기술원

... 본 발명은 3차원 레이저 스캐닝을 이용한 프리캐스트 콘크리트 형상 관리 장치 및 방법으로서, 프리캐스트 콘크리트 조립 부재의 전체 표면을 스캔하는 3차원 스캐너로 이루어진 형상 계측 모듈, 형상 정보 추출 알고리즘을 통하여 형상 계측 모듈로부터 받은 형상 정보의 특징을 추출하는 특징 추출 모듈 및 특징 추출 모듈에서 추출된 형상을 설계 형상과 비교하여 오차 발생을 분석하는 비교 분석 모듈을 포함하고, 조립 부재의 특징을 나타내는 포인트의 위치를 정렬시킴으로써 오차 발생 여부를 판단하는 3차원 레이저 스캐닝을 이용한 프리캐스트 콘크리트 형상 관리 장치 및 방법에 관한 것이다. 본 발명에 따른 차원 레이저 스캐닝을 이용한 프리캐스트 콘크리트 형상 관리 장치 및 방법은 비접촉적인 방법으로 조립 부재의 형상을 계측하고 관리할 수 있고, 특징 추출 알고리즘을 이용하여 신속하고 정확하게 오차 허용범위의 초과 여부를 자동으로 판단 가능한 장점이 있다.

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Номер записи: 10
20-07-2018 дата публикации

구조물의 진단 방법 및 진단 시스템

Номер: KR0101880194B1
Автор: 손훈, 송병주, 박병진, 리우 페이페이
Принадлежит: 한국과학기술원

... 구조물의 진단 방법은 제1 발진기 및 제2 발진기를 포함하는 구조물 진단 장치에서 수행될 수 있다. 구조물의 진단 방법은 제1 발진기에 의해 대상 구조물에서 생성되는 제1 초음파 신호, 제2 발진기에 의해 대상 구조물에서 생성되는 제2 초음파 신호 및 제1 및 제2 발진기에 의해 대상 구조물에서 생성되는 제3 초음파 신호를 각각 수신하는 단계; 상기 제3 초음파 신호에 기초하여 제1 상태 공간 어트랙터를 계산하는 단계; 상기 제1 초음파 신호 및 상기 제2 초음파 신호에 기초하여 제2 상태 공간 어트랙터를 계산하는 단계; 및 상기 제1 상태 공간 어트랙터 및 상기 제2 상태 공간 어트랙터에 기초하여 상기 대상 구조물의 손상 여부를 판단하는 단계를 포함할 수 있다.

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Номер записи: 11
31-05-2019 дата публикации

METHOD FOR VISUALIZING AND MEASURING THICKNESS DISTRIBUTION OF PAINT FILM LAYER AND DEVICE THEREFOR

Номер: WO2019103348A1
Автор: SOHN, Hoon, HWANG, Soonkyu, PARK, Jiho
Принадлежит:

Disclosed are a method for visualizing and measuring the thickness distribution of a paint film layer, and a device therefor. A heating unit applies light beams to heat a measurement target region of a measurement target structure while moving relative thereto. Together with the heating unit, a measurement unit images while scanning the measurement target region being heated, thereby generating a plurality of thermal images related to a phenomenon in which heat energy is propagated from the measurement target region. A coordinate transformation is performed according to a time-space integrated coordinate transformation algorithm to convert the plurality of dynamic thermal images into time-space integrated static thermal images. The thickness of the paint film layer can be calculated using a Fourier thermal conduction formula. The time-space integrated thermal images before heating are subtracted from the converted time-space integrated thermal images to remove noise caused by an external ...

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Номер записи: 12
18-05-2018 дата публикации

METHOD FOR DETECTING CONTACTLESS BONDING DEFECTS

Номер: KR0101845882B1
Автор: JYUNG DAE HYUK, JYUNG JUN HYUK, SOHN HOON, JEON IK GEUN, HYUN IL NAM, KIM TAE JIN
Принадлежит: NAWOO LTD., KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY

An embodiment of the present invention may comprise: an ultrasonic wave transmitting process of transmitting ultrasonic waves to a surface of a bonding member in which two members are bonded as transmitting ultrasonic waves; an ultrasonic wave receiving process of the ultrasonic waves penetrated by passing through the bonding member as receiving ultrasonic waves; and a countless bonding defect determining process of outputting an alarm of occurrence of bonding defects in an area of the bonding member irradiated with the ultrasonic waves when a time, at which the receiving ultrasonic waves arrive, exceeds a time at which the receiving ultrasonic waves arrive when the bonding member has no bonding defects. COPYRIGHT KIPO 2018 (AA) Start (BB) End (S510) Transmit ultrasonic waves (S520) Receive ultrasonic waves (S531) Set the normal arrival time (S5321) Extract noise components (S5322) Extract upper and lower threshold ranges (S5323) Determine the reference energy range (S533) Measure received ...

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Номер записи: 13
01-09-2017 дата публикации

투척식 센서를 이용한 구조물 붕괴 예측 시스템 및 방법

Номер: KR0101773819B1
Автор: 손훈, 김민구, 윤성흠
Принадлежит: 한국과학기술원

... 본 발명의 투척식 구조물 붕괴 예측 시스템은 현장에서 직접 구조물에 투척되어 구조물의 붕괴특성을 계측하고, 계측된 데이터를 무선 송신하는 적어도 하나 이상의 투척식 센서와 적어도 하나 이상의 투척식 센서들로부터 송신된 계측 데이터를 수신하고, 수신된 계측 데이터들을 융합하여 구조물의 붕괴여부를 예측하는 컴퓨터를 구비한다.

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Номер записи: 14
31-10-2016 дата публикации

구조물의 진단 방법 및 진단 시스템

Номер: KR0101670819B1
Автор: 손훈, 리우 페이페이, 양수영
Принадлежит: 한국과학기술원

... 구조물의 진단 방법에서는 센싱부가 레이져 빔에 의해 타겟 스트럭쳐로부터 생성되는 초음파 신호를 수신한다. 제어부가 초음파 신호에 기초하여 생성되는 초음파 주파수 스펙트럼에서 총 피크 점의 개수를 계산하고, 총 피크 점의 개수 중 문턱 값 이상에 해당하는 문턱 피크 점의 개수를 계산한다. 제어부가 총 피크 점의 개수 및 문턱 피크 점의 개수에 기초하여 타겟 스트럭쳐의 손상 여부를 판단한다. 본 발명의 실시예들에 따른 구조물의 진단 방법은 타겟 스트럭쳐로부터 생성되는 초음파 신호의 주파수 스펙트럼에서 총 피크 점의 개수 및 문턱 피크 점의 개수를 이용하여 타겟 스트럭쳐의 손상 여부를 판단함으로써 구조물 진단의 정확도를 높일 수 있다.

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Номер записи: 15
20-07-2018 дата публикации

DYNAMIC DISPLACEMENT CALCULATION DEVICE AND METHOD OF CALCULATING DYNAMIC DISPLACEMENT

Номер: KR101880193B1
Автор: SOHN, HOON, KIM, KI YOUNG, KOO, GUN HEE, CHOI, JAE MUK, CHUNG, JUN YEON
Принадлежит: KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY

The present invention provides a dynamic displacement calculation device including an accelerometer, a reference GPS sensor, a moving GPS sensor, a GPS reliability determination unit, an adaptive filter, GPS-RTK, a GPS-RTK reliability determination unit, and a Kalman filter. The accelerometer measures acceleration of a target body. The reference and moving GPS sensors measure first and second velocities, and the GPS reliability determination unit determines the reliability of the first and second velocities and outputs them as first and second measured velocities, and the adaptive filter calculates an estimated velocity of the target body based on the first and second measured velocities. The GPS-RTK measures a dynamic displacement of the target body, and the GPS-RTK reliability determination unit determines the reliability of the dynamic displacement to output it as a measured dynamic displacement. The Kalman filter can provide a final dynamic displacement corresponding to a more precise ...

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Номер записи: 16
09-03-2017 дата публикации

HYBRID WIRELESS POWER TRANSMISSION SYSTEM AND METHOD

Номер: WO2017039072A1
Автор: SOHN, Hoon, KIM, Ji-min, HAN, Min-seok
Принадлежит:

A hybrid wireless power transmission system comprises: a short-range power transmitter located at an accessible region so as to transmit power by using a short-range transmission method; at least one of sensor nodes dispersively arranged in an inaccessible region so as to receive the wireless power transmitted at a long range, and sensing a physical or chemical change; a wireless power repeater provided in the inaccessible region located at a short-range from the accessible region, receiving the wireless power transmitted at the short range from the accessible region, and transmitting the received power to at least one of sensor nodes by using a long-range transmission method.

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Номер записи: 17
26-04-2016 дата публикации

DIAGNOSIS METHOD OF FATIGUE CRACK AND DIAGNOSIS DEVICE

Номер: KR101615563B1
Автор: SOHN, HOON, LIM, HYUNG JIN
Принадлежит: KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY

A method of diagnosing damage to a target structure allows an excitation part to provide a first ultrasonic signal with a first frequency and a second ultrasonic signal with a second frequency higher than the first frequency to the target structure. A sensing part receives a response ultrasonic signal of the target structure for the first ultrasonic signal and the second ultrasonic signal. A control part provides a damage result value of the target structure based on a frequency spectrum of the response ultrasonic signal, and a threshold value of determining whether damage to the target structure exists. According to the embodiment of the present invention, the method of diagnosing damage to a target structure provides the damage result value of the target structure based on the frequency spectrum of the response ultrasonic signal and the threshold value calculated by providing several times a test ultrasonic signal with the second frequency; thereby determining the damage to the target ...

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Номер записи: 18
31-07-2015 дата публикации

SURFACE INSPECTION APPARATUS FOR SEMICONDUCTOR CHIPS AND METHOD OF INSPECTING SURFACES OF SEMICONDUCTOR CHIPS USING SAME

Номер: KR1020150088206A
Автор: MUN, YOUN JO, SOHN, HOON, KIM, SANG YOUNG, AN, YUN KYU, CHO, SUNG IL, HA, SEUNG WEON, YANG, JIN YEOL, HWANG, SOON KYU
Принадлежит:

Disclosed are an apparatus and a method for inspecting surfaces of semiconductor chips. A continuous wave laser with periodicity is generated and modified to generate a laser beam for an inspection, which has an optical section size smaller than the surface size of a semiconductor chip. Light is partially and simultaneously injected onto the surfaces of a plurality of semiconductor chips, the surfaces of the semiconductor chips are heated, and then a heat wave emitting from the semiconductor chips corresponding to the laser beam is detected, thereby generating a thermal image. A surface image indicating a defect on the surfaces of the semiconductor chips is obtained by performing an image process on the thermal image. The continuous wave laser with periodicity is partially and simultaneously injected onto the surfaces of the semiconductor chips to perform a surface inspection, thereby reducing a surface inspection time and increasing the accuracy of surface inspection. COPYRIGHT KIPO 2015 ...

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Номер записи: 19
06-02-2014 дата публикации

LASER ULTRASONIC IMAGING METHOD AND LASER ULTRASONIC IMAGING DEVICE FOR ROTATIONAL STRUCTURE

Номер: WO2014021564A1
Автор: SOHN, Hoon, PARK, Byeong Jin, TRUONG, Thanh Chung
Принадлежит:

The present invention relates to an integrity evaluation system which is capable of visualizing the interaction between a damaged portion and an ultrasonic procedure such that field workers can confirm information on the location and the size or the like of the damage in an easy and intuitive manner, thereby efficiently managing a rotational structure such as a turbine blade, and the integrity evaluation system comprises: an ultrasonic generation system which irradiates pulse laser on one side of the rotational structure so as to generate ultrasonic waves; a pulse laser control system for adjusting a time for irradiating the pulse laser; an ultrasonic measurement system for measuring ultrasonic waves generated from the other side of the rotational structure; and a damage detection system which visualizes a measured ultrasonic signal and automatically provides information on the existence of damage and the position and severity of the damage of the rotational structure.

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Номер записи: 20
17-03-2016 дата публикации

APPARATUS AND METHOD FOR DETECTING DEFECTS IN TRIPLEX BONDING IN LNG CARRIER

Номер: WO2016039564A1
Автор: YUN, Won-Jun, SOHN, Hoon, BAE, Han-Jin, SONG, Eun-Ha, BAEK, Yun-Ho, LIM, Hyungjin, SONG, Homin, LEE, Sangmin
Принадлежит:

Disclosed is an apparatus for detecting defects in triplex bonding in an LNG carrier, the apparatus comprising: a heating unit for applying heat to the surface of an object to be inspected to generate a thermal wave propagating in the thickness-wise direction thereof; a thermographic camera for photographing the object to be inspected, which has been heated by the heating unit, to generate a thermal image; and a control unit for receiving and processing the thermal image to calculate information regarding defects which have formed in the object to be inspected. Such an apparatus and a method for detecting defects in triplex bonding in an LNG carrier can provide the benefit of automatically detecting the type, size and location of the defects occurring in the triplex bonding in an LNG carrier and of providing the detection results to a user.

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Номер записи: 21
23-03-2016 дата публикации

APPARATUS AND METHOD TO DETECT DEFECT IN TRIPLEX ADHESIVE PART OF LNG CARRIER SHIP

Номер: KR1020160031630A
Автор: YUN, WON JUN, SOHN, HOON, LIM, HYUNG JIN, BAE, HAN JIN, SONG, EUN HA, BAEK, YUN HO, SONG, HO MIN, LEE, SANG MIN
Принадлежит:

Disclosed are an apparatus and a method to detect a defect in a triplex adhesive part of an LNG carrier ship automatically detecting the existence, type, generated area, and size of a defect formed on the triplex adhesive part of the LNG carrier ship. The disclosed apparatus to detect a defect in the triplex adhesive part of the LNG carrier ship comprises: a heating part generating heat wave spreading in a thickness direction of an object by heating a surface of the object; a thermal image camera generating a thermal image by photographing the object heated by the heating part; and a control part calculating information of a defect generated in the object by receiving and treating the thermal image. According to the apparatus and method to detect a defect in the triplex adhesive part of the LNG carrier ship, type, size, and generated area of a defect generated in a triplex adhesive part of the LNG carrier ship are automatically detected to provide a detection result to a user. COPYRIGHT ...

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Номер записи: 22
23-01-2017 дата публикации

METHOD AND APPARATUS FOR CONTACTLESS DEFECT INSPECTION THROUGH MULTI-POINT CONCURRENT LASER EXCITATION

Номер: KR101694812B1
Автор: SOHN, HOON, PARK, BYEONG JIN
Принадлежит: KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY

A contactless defect inspection apparatus through multi-point concurrent laser excitation of the present invention comprises: a multi-point concurrent laser emitting unit for simultaneously generating a plurality of shock waves by simultaneously emitting laser beams corresponding to a plurality of points on an object surface; a measurement unit for emitting a measurement laser beam to a measurement point on the object surface to measure one shock wave in which a plurality of ultrasonic waves are superimposed; and a signal processor for separating a shock wave signal measured by the measurement unit into shock waves for each of the plurality of points, constructing a shock wave image using the separated shock waves, and detecting a defect from the constructed shock wave image. COPYRIGHT KIPO 2017 (110) Multi-point concurrent laser irradiation unit (120) Measurement unit (130) Data collecting unit (142) Dividing module (144) Image module (146) Determination module ...

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Номер записи: 23
08-03-2018 дата публикации

구조물 모니터링용 센서를 위한 전력 및 데이터의 동시 무선 전송 방법 및 이를 위한 시스템

Номер: KR0101835034B1
Автор: 문건우, 장유진, 조신영, 한정규, 김지민, 손훈
Принадлежит: 한국과학기술원

... 구조물 모니터링용 센서를 위한 전력 및 데이터의 동시 무선 전송 방법 및 이를 위한 시스템이 개시된다. 통신 모듈과 전력선 없이, 검사용 차량에 탑재되는 1차 측 공진회로와 도로나 교량에 설치되는 2차 측 공진 회로를 매개로 하여, 교량용 센서에 전력을 무선 송전하고, 또한 센서가 검출한 도로나 교량의 모니터링 정보를 디지털 신호로 변환하고 그에 기초하여 2차 측 부하를 변동시켜 그에 상응하는 1차 측 전압 변동을 야기하는 방식으로 센서가 검출한 정보를 1차 측으로 전달한다. 제안하는 시스템은 코일 사이의 자기 간섭에 의한 데이터 전송에 에러가 발생하는 기존 방식과는 달리, 통신을 위한 안테나 및 부가 회로를 사용하지 않음으로써, 데이터 전송에 에러가 없는 장점을 가진다. 또한 부가 회로를 사용하지 않기 때문에 전체 시스템이 구성이 간단하고, 교량에 설치한 센서의 유지 보수비용을 절감할 수 있다.

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Номер записи: 24
28-03-2018 дата публикации

DAMAGE DETECTION METHOD AND DAMAGE DETECTION DEVICE FOR PERFORMING SAME

Номер: KR1020180031246A
Автор: SOHN, HOON, PARK, BYEONG JIN
Принадлежит:

A damage detection device irradiates a target structure with laser beam and detects the damage of the target structure by using ultrasound signal generated by the laser beam. A damage detection method selects a target line from a plurality of inspection lines of the target structure, performs the first scanning operation for dividing a target line into a plurality of block groups and searching a damage block group including a damaged region among the block groups, performs the second scanning operation for searching border damage blocks with a binary searching method in accordance with the damage block group, and detects the damage block of the target structure based on the border damage blocks. COPYRIGHT KIPO 2018 (AA) Start (BB) End (S110) Select target line (S120) Select damage block group(1ST SCANNING - COARSE SCANNING) (S130) Search border damage blocks with a binary searching method(2ND SCANNING - DENSE SCANNING) (S140) Is there the next target line? (S150) Detect damage block of ...

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Номер записи: 25
08-06-2018 дата публикации

SENSOR TO MONITOR TENSION OF TENDON AND TENDON TENSION DIAGNOSIS SYSTEM USING SAME

Номер: KR1020180061869A
Автор: SOHN, HOON, LEE, JUN, KIM, JI MIN
Принадлежит:

The present invention relates to a sensor to monitor tension of tendon with enhanced sensitivity, and a tendon tension diagnosis system using the same. According to the present invention, an eddy current sensor device comprises a coil part and a casing. The coil part includes: an exciting coil to generate a first magnetic field; and a sensing coil to detect an electric signal corresponding to a second magnetic field generated by eddy current induced in a target structure by the first magnetic field and a complex magnetic field of the first magnetic field. The casing blocks the coil part from the outside while receiving the coil part therein. The coil part includes a magnetic part received and fixed therein to fix the casing and the coil part to the target structure by magnetic force. To detect tension of a tendon providing a stress changed based on tension, an eddy current sensor is installed on a surface of at least one wedge with magnetic permeability changed in accordance with the stress ...

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Номер записи: 26
18-10-2018 дата публикации

METHOD FOR DETECTING REINFORCING REBAR POSITION IN PRECAST CONCRETE AND APPARATUS FOR DETECTING SAME

Номер: WO2018190570A1
Автор: SOHN, Hoon, WANG, Qian
Принадлежит:

A method and an apparatus for detecting a reinforcing rebar position in precast concrete are disclosed. The precast concrete is irradiated with a laser to output scan data comprising color information and geometry information. On the basis of the geometry information and the color information, the valid scan data which removes the mixed pixels from the scan data is generated. The rebar scan data which is data representing reinforcing rebars is extracted from the valid scan data. The rebar scan data is divided into a plurality of segments using a region growing method and the segments are evaluated to select and output valid segments corresponding to each of the reinforcing rebars. Then, the position of each of the reinforcing rebars can be calculated by comparing a predefined design model of precast concrete with the valid segments.

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Номер записи: 27
28-11-2018 дата публикации

METHOD AND DEVICE FOR ESTIMATING POSITION OF PRECAST COMPONENTS

Номер: KR101905103B1
Автор: SOHN, HOON, YOON, SEONG HEUM, WANG QIAN
Принадлежит: KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY

Disclosed are a method and a device for estimating positions of precast components capable of effectively estimating positions of precast concrete decks to be combined with precast girders. The method for estimating positions of precast components includes the steps of: acquiring scan data related with shapes and sizes of precast girders to be combined with precast concrete decks using a 3D laser scanner; executing a preconditioning process to the scan data to filter noise data from the scan data and extract first scan data; extracting shear connector data related with shear connectors formed on the precast girders from the first scan data; extracting head data related with heads of the shear connectors based on the shear connector data; estimating positions of the shear connectors based on the head data; and estimating optimum positions of the precast concrete decks to be combined with the shear connectors using information on positions of the shear connectors and information on shapes ...

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Номер записи: 28
09-06-2017 дата публикации

하이브리드 무선전력전송을 이용한 접근곤란영역 감시 시스템 및 방법

Номер: KR0101745609B1
Автор: 손훈, 김지민, 한민석
Принадлежит: 한국과학기술원

... 하이브리드 무선 전력전송을 이용한 접근곤란영역 감시 시스템은 접근가능영역에 위치하여 근거리 전송방식으로 전력을 전송하는 근거리 전력 전송기와, 접근곤란영역에 분산 배치되어 원거리 전송된 무선전력을 수신하고, 물리적 또는 화학적 변화를 센싱하는 적어도 하나 이상의 센서노드들과, 접근가능영역과 근거리에 위치한 접근곤란영역에 설치되고, 접근가능영역으로부터 근거리 전송된 무선전력을 수신하고, 수신된 전력을 적어도 하나 이상의 센서노드들에게 원거리 전송 방식으로 전송하는 무선전력 중계기를 구비한다.

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Номер записи: 29
20-03-2018 дата публикации

THREE-DIMENSIONAL LASER SCANNER

Номер: KR101840328B1
Автор: SOHN, HOON, WANG QIAN, YOON, SEONG HEUM
Принадлежит: KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY

The present invention relates to a three-dimensional laser scanner, which comprises: a range sensor for shining a laser beam and receiving a reflected beam from a scanning position; an operating unit for allowing the range sensor to be operated to be rotated in the parallel direction and the perpendicular direction; and a controller for calculating a range to the scanning position based on the shone laser beam and the reflected beam, and producing scanning data about objects having the scanning position based on the calculated range. The controller estimates a first probability distribution function on a valid position and a second probability distribution function a mixed pixel based on the scanning data. Moreover, the controller filters a data value with respect to the mixed pixel in the scanning data based on the first probability distribution function and the second probability distribution function. The valid position can be included in the object, and a portion of the mixed pixel ...

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Номер записи: 30
09-08-2018 дата публикации

SYSTEM FOR PRECISION MEASUREMENT OF STRUCTURE AND METHOD THEREFOR

Номер: WO2018143625A1
Автор: KWON, Nam-Yeol, KANG, Doo-Young, PARK, Seung-Beom, KIM, Min-Jae, MOON, Jae-Min, KANG, Jin-Seok, SOHN, Hoon, KIM, Ki-Young, KOO, Gun-Hee, CHOI, Jae-Muk, CHUNG, Jun-Yeon
Принадлежит:

Disclosed are a system for precision measurement of a structure and a method therefor. A reference measuring instrument installed at a fixed location provides GPS reference information. A plurality of response measuring instruments, installed respectively at a plurality of positions on the structure, acquire acceleration information through acceleration sensors. The plurality of response measuring instruments measure a plurality of RTK displacement information by using the GPS reference information, respectively. The plurality of response measuring instruments generate and transmit the acceleration information and the plurality of RTK displacement information as one packet by time-synchronizing the acceleration information and the plurality of RTK displacement information. An operation processor receives the transmitted acceleration information and the transmitted plurality of RTK displacement information to calculate structure response information. It is possible to precisely measure dynamic ...

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Номер записи: 31
30-11-2017 дата публикации

SYSTEM TO PRECISELY MEASURE STRUCTURE AND METHOD THEREOF

Номер: KR101803503B1
Автор: KWON, NAM YEOL, KANG, DOO YOUNG, PACK, SEUNG BEOM, KIM, MIN JAE, MOON, JAE MIN, KANG, JIN SEOK, SOHN, HOON, KIM, KI YOUNG, KOO, GUN HEE, CHOI, JAE MUK, CHUNG, JUN YEON
Принадлежит: POONGSAN FNS CO., LTD., KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY

The present invention relates to a system to precisely measure a structure and a method thereof, comprising: a reference meter installed in a fixated location providing GPS reference information received via a reference GPS module; a plurality of response meters including an acceleration sensor and a response GPS module, installed in each of a plurality of locations of a structure, and transmitting a plurality of RTK displacement information measured by the response GPS module using acceleration information obtained through the acceleration sensor and the GPS reference information; and an operation processor to calculate structure response information using the transmitted acceleration information and the plurality of pieces of RTK displacement information. Accordingly, the present invention is able to precisely measure a dynamic behavior of structures including high-rise buildings, bridges, dams, and harbors using the GPS and accelerometer. COPYRIGHT KIPO 2017 (110) Reference meter (120 ...

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Номер записи: 32
08-12-2017 дата публикации

DIAGNOSIS METHOD AND DIAGNOSIS SYSTEM FOR STRUCTURE

Номер: KR1020170135065A
Автор: SOHN, HOON, SONG, BYEONG JU, PARK, BYEONG JIN, LIU PEIPEI
Принадлежит:

A diagnosis method for a structure is able to be performed in a structure diagnosis apparatus including a first oscillator and a second oscillator. The diagnosis method for the structure comprises: a step of receiving a first ultrasonic signal generated in a target structure by the first oscillator, a second ultrasonic signal generated in the target structure by the second oscillator, and a third ultrasonic signal generated in the target structure by the first and second oscillators; a step of calculating a first state space attractor based on the third ultrasonic signal; a step of calculating a second state space attractor based on the first ultrasonic signal and the second ultrasonic signal; and a step of determining whether the target structure is damaged based on the first state space attractor and the second state space attractor. COPYRIGHT KIPO 2017 ...

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Номер записи: 33
07-12-2016 дата публикации

APPARATUS AND METHOD FOR CONTACTLESS DURABILITY DIAGNOSIS

Номер: KR101683518B1
Автор: PARK, JAE ROUNG, LIM, CHEOL WOO, PARK, BYEONG JIN, SONG, BYEONG JU, SOHN, HOON
Принадлежит: KIA MOTORS CORPORATION, KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY

Disclosed are an apparatus and a method for contactless durability diagnosis. The apparatus for contactless durability diagnosis comprises: a first signal generator to apply a first excitation ultrasonic wave to a target to generate a first frequency signal from the target; a second signal generator to apply a second excitation ultrasonic wave different from the first excitation ultrasonic wave to the target to generate a second frequency signal from the target; a first control unit to control the first and the second signal generator to sequentially perform a first step of sequentially applying the first and the second excitation ultrasonic wave to the target and a second step of simultaneously applying the first and the second excitation ultrasonic wave to generate a synthetic frequency signal from the target; a storage unit to store the first frequency signal and the second frequency signal generated from the target by the first step of the first control unit, and the synthetic frequency ...

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Номер записи: 34
25-03-2016 дата публикации

DIAGNOSIS METHOD FOR STRUCTURE AND DIAGNOSIS SYSTEM

Номер: KR1020160032870A
Автор: SOHN, HOON, LIU PEIPEI, YANG, SU YOUNG
Принадлежит:

The present invention relates to a diagnosis method for a structure and a diagnosis system. In the diagnosis method for a structure, a sensing unit receives an ultrasonic signal generated from a target structure by a laser beam. A control unit calculates a number of total peak points in an ultrasonic frequency spectrum generated based on the ultrasonic signal, and calculates the number of threshold peak points corresponding to threshold values or more among the number of total peak points. The control unit determines damage to the target structure based on the number of the total peak points and the number of the threshold peak points. According to the embodiments of the present invention, the diagnosis method for a structure improves accuracy of diagnosing the structure by determining damage to the target structure using the number of total peak points and the number of threshold peak points in a frequency spectrum of the ultrasonic signal generated in the target structure. COPYRIGHT KIPO ...

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Номер записи: 35
09-03-2017 дата публикации

HYBRID WIRELESS POWER TRANSMISSION SYSTEM AND METHOD THEREOF

Номер: KR1020170026988A
Автор: SOHN, HOON, KIM, JI MIN, HAN, MIN SEOK
Принадлежит:

A hybrid wireless power transmission system includes a local power transmitter which is located in an accessible region and transmits power in a local transmission scheme, at least one or more sensor nodes which are distributed and arranged in a difficult-to-access region, receive wireless power which is transmitted from a distant place, and sense physical or chemical changes, and a wireless power repeater which is installed in the accessible region and the difficult-to-access region which is located in a local distance, receives wireless power which is locally transmitted from the accessible region, and transmits the received power to the at least one or more sensor nodes in a far distance transmission scheme. Accordingly, the present invention can efficiently transmit power. COPYRIGHT KIPO 2017 ...

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Номер записи: 36
18-10-2018 дата публикации

METHOD FOR DETECTING POSITION OF REBAR OF PRECAST CONCRETE AND DETECTING APPARATUS THEREOF

Номер: KR1020180114316A
Автор: SOHN, HOON, WANG QIAN
Принадлежит:

A method for detecting a position of rebar of precast concrete may comprise the steps of: irradiating precast concrete with laser to output scan data including color information and geometry information; generating valid scan data in which mixed pixels are removed from the scan data based on the geometry information and color information; extracting rebar scan data representing rebar from the valid scan data; dividing the rebar scan data into a plurality of segments using a region growing method and evaluating the segments to select and output valid segments corresponding to each of the rebar; and comparing the valid segments with predefined design models of precast concrete to calculate positions of each of the rebar. Therefore, the accuracy of calculation of rebar positions may be greatly improved. COPYRIGHT KIPO 2018 (AA) Start (BB) End (S100) Output scan data by irradiating precast concrete with a 3D laser (S200) Generate valid scan data to remove a mixed pixel using geometry information ...

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Номер записи: 37
23-06-2015 дата публикации

DEVICE TO ACCELERATE DAMAGE DIAGNOSIS OF STRUCTURE THROUGH MULTILEVEL NON-CONTACT LASER SCANNING AND DIAGNOSING METHOD THEREOF

Номер: KR1020150069187A
Автор: SOHN, HOON, PARK, BYEONG JIN
Принадлежит:

The present invention relates to a device to accelerate the damage diagnosis of the structure through multilevel non-contact laser scanning and a diagnosing method thereof. The device includes a pulse laser generating an ultrasonic wave by emitting a laser beam to a structure; an ultrasonic wave measurer measuring the ultrasonic wave, generated in the structure; a rotary mirror controlling the pulse laser and the ultrasonic wave measurer; a counterstroke extracting module analyzing signals, collected from a pair of a measurement point and generation point of the ultrasonic wave, and extracting a counterstroke ultrasonic element in order to estimate a damaged position of the structure; a correlation analyzing module collecting a bidirectional ultrasonic signal through a single path and analyzing a correlation in order to estimate the damaged position of the structure; and an image processing module extracting damage information by making an image of the data, measured in the ultrasonic wave ...

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Номер записи: 38
22-11-2018 дата публикации

METHOD FOR ESTIMATING POSITION OF PRECAST COMPONENTS AND POSITION ESTIMATION DEVICE

Номер: WO2018212472A1
Автор: SOHN, Hoon, YOON, Seongheum, WANG, Qian
Принадлежит:

A method for estimating a position of a precast concrete bottom plate comprises the steps of: acquiring scan data related to shapes and dimensions of precast girders to be coupled with precast concrete bottom plates by using a three-dimensional laser scanner; filtering noise data from the scan data by performing a data preprocessing process on the scan data so as to extract first scan data therefrom; extracting, from the first scan data, shear connector data related to shear connectors formed at each of the precast girders; extracting head data related to each of heads of the shear connectors on the basis of the shear connector data; estimating a position of each of the shear connectors on the basis of the head data; and estimating an optimum position of each of the precast concrete bottom plates to be coupled with the shear connectors by using the position of each of shear connectors and the shape information on the precast concrete bottom plates.

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Номер записи: 39
10-10-2016 дата публикации

INSPECTION APPARATUS AND CONTROL METHOD THEREOF

Номер: KR1020160116925A
Автор: KIM, IL, SOHN, HOON, MOON, YOUNG JUN, JANG, KYUNG WOON, CHUNG, CHANG KYU, CHOI, SEONG WOO, PARK, BYEONG JIN, YANG, JIN YEOL, CHOI, JAE MOOK, HWANG, SOON GYU
Принадлежит:

An inspection apparatus comprises: a laser irradiation part which irradiates either the target point of an object or a measurement point apart from the target point of the object by a preset distance with a laser; a measurement part which generates forward measurement data in the measurement point if the case the target point is irradiated with the laser and generates reverse measurement data in the target point in the case that the measurement point is irradiated with the laser; and a signal processing part which determines the defects of the object on the basis of the autocorrelation and cross correlation of the forward measurement data and the reverse measurement data. COPYRIGHT KIPO 2016 (10) Object (110) Laser irradiation part (111) Light source (112) Laser direction control unit (130) Measurement unit (140) Signal processing unit (150) Output unit ...

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Номер записи: 40
25-08-2016 дата публикации

PRECAST CONCRETE SHAPE MANAGEMENT DEVICE AND PRECAST CONCRETE SHAPE MANAGEMENT SYSTEM INCLUDING SAME

Номер: KR101651058B1
Автор: SOHN, HOON, WANG QIAN, KIM, MIN KOO
Принадлежит: KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY

A precast concrete shape management device comprises a laser scanner, a noise remover, a coarse controller, a fine controller, and a determination device. The laser scanner transmits a laser beam to a side of a target object via a reflective mirror, and receives scan data transferred from the side of the target object via the reflective mirror. The noise remover removes noise included in the scan data to provide side data of the target object. The coarse controller matches a side edge formed by side edge data corresponding to an edge of the side of the target object in the side data with a model edge formed by model edge data corresponding to an edge of a predetermined design model to provide coarse side data corresponding to the side data. The fine controller maps a point corresponding to the coarse side data onto one surface among a plurality of surfaces included in the side of the target object to provide fine side data. The determination device compares the fine side data and design ...

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Номер записи: 41
06-11-2014 дата публикации

APPARATUS FOR WIRELESSLY DIAGNOSING STRUCTURE USING NONLINEAR ULTRASONIC MODULATION TECHNIQUE AND DIAGNOSIS METHOD FOR ASSURING SAFETY USING SAME

Номер: WO2014178518A1
Автор: SOHN, Hoon, LIM, Hyung Jin, YANG, Su Young, LIU, Peipei
Принадлежит:

A method for diagnosing a structure to assure the safety thereof according to the present invention includes the steps of: making the structure vibrate by applying all signals of different frequencies; converting the responses of the structure elicited by the vibration into digital signals; generating primary modulation signals by synchronizing and demodulating the digital signals rid of the harmonics and the linear response of the signals of different frequencies; generating a first sideband spectrogram by combining the primary modulation signals corresponding with frequencies, the primary modulation signals being extracted by continuously changing the frequencies of the signals; and judging whether the structure is fissured based on the first sideband spectrogram, precisely detecting a flaw in spite of the very small power of the ultrasonic wave applied to the structure compared to the conventional technology, thus decreasing the power consumption.

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Номер записи: 42
25-07-2013 дата публикации

APPARATUS AND METHOD FOR DETECTING PIPE DAMAGE

Номер: WO2013108948A1
Автор: SOHN, Hoon, LEE, Hyeon Seok, YANG, Jin Yeol
Принадлежит:

The present invention relates to an apparatus and a method for detecting pipe damage, and comprises: an ultrasound supply portion for generating an ultrasound signal from a pipe; a reception portion for receiving the ultrasound signal from the pipe; and an analysis portion for analyzing the ultrasound signal received by the reception portion and determining whether the pipe is damaged. The apparatus and the method for detecting pipe damage, according to the present invention, can detect damage to the pipe, which is difficult to observe due to lack of accessibility by inspectors.

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Номер записи: 43
27-02-2017 дата публикации

구조물의 진단 방법 및 진단 시스템

Номер: KR0101710508B1
Автор: 손훈, 리우 페이페이, 양수영
Принадлежит: 한국과학기술원

... 구조물의 진단 방법에서는 센싱부가 레이져 빔에 의해 타겟 스트럭쳐로부터 생성되는 초음파 신호를 수신한다. 제어부가 초음파 신호에 기초하여 생성되는 초음파 주파수 스펙트럼에서 총 피크 점의 개수를 계산하고, 총 피크 점의 개수 중 문턱 값 이상에 해당하는 문턱 피크 점의 개수를 계산한다. 제어부가 총 피크 점의 개수 및 문턱 피크 점의 개수에 기초하여 타겟 스트럭쳐의 손상 여부를 판단한다. 본 발명의 실시예들에 따른 구조물의 진단 방법은 타겟 스트럭쳐로부터 생성되는 초음파 신호의 주파수 스펙트럼에서 총 피크 점의 개수 및 문턱 피크 점의 개수를 이용하여 타겟 스트럭쳐의 손상 여부를 판단함으로써 구조물 진단의 정확도를 높일 수 있다.

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Номер записи: 44
17-10-2017 дата публикации

SIMULTANEOUS WIRELESS TRANSMISSION METHOD OF POWER AND DATA FOR SENSOR FOR STRUCTURE MONITORING AND SYSTEM THEREFOR

Номер: KR1020170115267A
Автор: MOON, GUN WOO, JANG, YU JIN, CHO, SHIN YOUNG, HAN, JUNG KYU, KIM, JI MIN, SOHN, HOON
Принадлежит:

Disclosed are a simultaneous wireless transmission method of a power and data for a sensor for structure monitoring and a system therefor. A power is wirelessly transmitted to a bridge sensor via a primary side resonance circuit mounted on an inspection vehicle or a secondary side resonance circuit installed on a road or a bridge without a communication module and a power line. Also, the sensor converts monitoring information of the road or the bridge into a digital signal, and transmits the information detected by the sensor to a primary side in a method of causing a primary side voltage fluctuation by fluctuating a secondary side load based thereon. The disclosed system does not use an additional circuit and an antenna for a communication unlike a conventional method in which an error occurs in a data transmission due to a magnetic interference between coils, so that the error does not occur in the data transmission. Since the additional circuit is not used, a composition of the entire ...

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Номер записи: 45
24-04-2018 дата публикации

손상 검출 방법 및 이를 수행하는 손상 검출 장치

Номер: KR0101851718B1
Автор: 손훈, 박병진
Принадлежит: 한국과학기술원

... 레이저 빔을 타겟 스트럭처에 조사하고, 레이저 빔에 의해 생성되는 초음파 신호를 이용하여 타겟 스트럭처의 손상을 검출하는 손상 검출 장치의 손상 검출 방법은 타겟 스트럭처의 복수의 검사 라인들 중 타겟 라인을 선택하고, 타겟 라인을 복수의 블록 그룹들로 나누고 블록 그룹들 중 손상된 영역을 포함하는 손상 블록 그룹을 검색하는 제1 스캐닝 동작을 수행하며, 손상 블록 그룹에 대해 이진 탐색 방식으로 경계 손상 블록들을 검색하는 제2 스캐닝 동작을 수행하고, 경계 손상 블록들에 기초하여 타겟 스트럭처의 손상 블록을 검출한다.

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Номер записи: 46
07-06-2018 дата публикации

SENSOR FOR MONITORING TENDON TENSILE STRENGTH AND TENDON TENSILE STRENGTH DIAGNOSIS SYSTEM USING SAME

Номер: WO2018101626A1
Автор: SOHN, Hoon, LEE, Jun, KIM, Ji-min
Принадлежит:

An eddy current sensor device includes a coil part and a casing. The coil part includes: an excitation coil for generating a first magnetic field; and a sensing coil for detecting an electrical signal corresponding to a second magnetic field generated by an eddy current induced into a target structure by a first magnetic field, and to a synthetized magnetic field of the first magnetic field. The casing encompasses the coil part and blocks the same from the outside while accommodating the same therein. A magnetic part, which is accommodated and fixed inside the casing in order to fix the casing and the coil part to the target structure by magnetic force, can be further included. An eddy current sensor for the tensile strength of a tendon for providing stress changing on the basis of the tensile strength is provided on the surface of at least one wedge, which is press-fitted between the tendon and an anchor head such that a magnetic permeability thereof changes according to the stress of ...

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Номер записи: 47
18-05-2018 дата публикации

AUTOMATIC TEST APPARATUS USING NON-CONTACT ULTRASONIC WAVE

Номер: KR0101844926B1
Автор: JYUNG DAE HYUK, JYUNG JUN HYUK, HYUN IL NAM, KIM TAE JIN, SOHN HOON, JEON IK GEUN
Принадлежит: NAWOO LTD.

According to an embodiment of the present invention, an automatic test apparatus using a non-contact ultrasonic wave comprises: an ultrasonic wave transmitter-receiver transmitting each of a first ultrasonic wave and a second ultrasonic wave to an object to be tested with a first transmission angle and a second transmission angle provided from a test monitoring machine, receiving a reflection wave with a receiving angle provided from the test monitoring machine, and providing the received reflection wave to the test monitoring machine; and the test monitoring machine determining the first transmission angle, the second transmission angle, and the receiving angle for strength of the reflection wave to be maximum to be provided to the ultrasonic wave transmitter-receiver, and determining whether the object to be tested is damaged in accordance with types of the reflection wave provided from the ultrasonic wave transmitter-receiver to be displayed. COPYRIGHT KIPO 2018 (100) Ultrasonic wave ...

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Номер записи: 48