Настройки

Укажите год
-

Небесная энциклопедия

Космические корабли и станции, автоматические КА и методы их проектирования, бортовые комплексы управления, системы и средства жизнеобеспечения, особенности технологии производства ракетно-космических систем

Подробнее
-

Мониторинг СМИ

Мониторинг СМИ и социальных сетей. Сканирование интернета, новостных сайтов, специализированных контентных площадок на базе мессенджеров. Гибкие настройки фильтров и первоначальных источников.

Подробнее

Форма поиска

Поддерживает ввод нескольких поисковых фраз (по одной на строку). При поиске обеспечивает поддержку морфологии русского и английского языка
Ведите корректный номера.
Ведите корректный номера.
Ведите корректный номера.
Ведите корректный номера.
Укажите год
Укажите год
Применить Всего найдено 7. Отображено 7.
06-07-2016 дата публикации

Adjustable knob of feeling

Номер: CN0205376366U
Автор: SHI JIAN, LI HUAQIANG, MAO PANZE, QUAN QI, CHEN XUESHENG
Принадлежит:

... 一种手感可调旋钮，包括壳体、设于壳体中的旋钮与旋转体，所述旋钮旋转时带动旋转体转动，所述壳体中还设有可转动的且径向距离不同的齿轮件，所述齿轮件与旋转体之间设有弹性件，所述旋钮可下压且下压状态能带动齿轮件转动。本实用新型结构紧凑，组装方便，在转动过程中就能够方便的进行手感的调整。 ...

Подробнее
Номер записи: 1
22-08-2023 дата публикации

Bi-directional ultra-low pressure gas pipeline leakage sound wave signal detection method

Номер: CN116624793A
Автор: SHI JIAN, LV PIN, WU ZHIPENG, SU YUPING, CAI CHENG
Принадлежит:

The invention relates to a bi-directional ultra-low pressure gas pipeline leakage sound wave signal detection method, which comprises the following steps of: carrying out front and back double-sided tight circular array arrangement on single-directional differential analog output MEMS microphones to form a bi-directional microphone circular array perpendicular to a pipeline direction for collecting pipeline leakage sound wave signals; the design of a conditioning circuit is optimized, low-noise pre-amplification, automatic gain amplification, analog band-pass filtering and other processing are carried out on signals of each channel, on the premise that the phase difference can be ignored, multi-channel analog signals are combined into a single output signal through a summing circuit formed by a precise operational amplifier, signal enhancement of an analog domain is achieved, and the signal processing precision is improved. Converting the signal into a digital signal through an analog-to-digital ...

Подробнее
Номер записи: 2
11-08-2023 дата публикации

Air pipe leakage signal detection method and system

Номер: CN116576405A
Автор: LV PIN, SHI JIAN, SUN WENBO
Принадлежит:

The invention relates to an air pipe leakage signal detection method and system. The detection method comprises the following steps: acquiring a sound wave signal acquired by a sound wave sensor arranged on an air pipe; converting the sound wave signal into a speech spectrogram; the spectrogram is sent to a trained air duct leakage detection model, a leakage signal detection result output by the air duct leakage detection model is obtained, and the air duct leakage detection model is a multi-scale mSLSDNet model. Compared with the prior art, the system has the advantages that the sound wave signal is converted into the spectrogram, the deep learning model is used for monitoring the leakage of the air pipe in real time, the quick, accurate and reliable detection of the leakage of the pipeline is realized, and the air pipe leakage detection model has circulating operation between the backbone network and the circulating bidirectional feature aggregation module; a feature aggregation mechanism ...

Подробнее
Номер записи: 3
12-09-2017 дата публикации

Based on maximum likelihood estimation of the ultra-short baseline acoustic positioning system and its positioning algorithm

Номер: CN0105137394B
Автор: 王熙赢, 罗宇, 施剑
Принадлежит:

... 本发明公开了种基于极大似然估计的超短基线水声定位系统及其定位算法，解决了超短基线定位系统远距离定位精度低的技术问题；系统由产生及发射超声波定位信号的水下应答器和接收及处理超声波定位信号的接收声基阵两部分组成；定位算法利用各基阵元信号间的内在几何关系，不需要求解超声信号到达声基阵阵元的方位角，避免求解方位角误差对定位精度的影响，提高了位置解算的精度；并通过极大似然估计将到达所有阵元的信号求和后进行整体处理，可以得到全局最优的定位结果；超声信号进行统解算，相当于增加了积分时间，因此当信号的信噪比较低时，可以有效的提高信噪比，进步保证信号精度。 ...

Подробнее
Номер записи: 4
29-08-2023 дата публикации

Novel frequency hopping TOD receiving method and device

Номер: CN116667878A
Автор: HUANG XIANBIN, SHI JIAN, LI ZHIRUI, WANG YUEKAI, HAO JUNTENG
Принадлежит:

The invention discloses a novel frequency hopping TOD receiving method and device, and the method comprises the following steps: inputting I and Q paths of data received by a baseband into a matched filter for matched filtering processing, and obtaining a first correlation value and a second correlation value; performing energy summation on I and Q data received by the baseband, and taking an energy summation result as a threshold value Th of correlation peak comparison; performing correlation peak processing according to the first correlation value, the second correlation value and a threshold value Th; and carrying out TOD data demodulation according to a correlation peak processing result. According to the invention, the received data is despread and then demodulated, and the TOD data is extracted, so that the TOD data transmission has higher reliability and lower receiving sensitivity, and has stronger anti-interference capability.

Подробнее
Номер записи: 5
08-08-2023 дата публикации

Nondestructive testing and positioning method and system for leakage of long-distance ultra-low-pressure large-diameter pipeline

Номер: CN116557797A
Автор: CAI CHENG, GAO YANG, LV PIN, CHEN YANG, SHI JIAN
Принадлежит:

The invention discloses a nondestructive testing and positioning method and system for leakage of a long-distance ultra-low-pressure large-diameter pipeline, and the method comprises the steps: arranging a plurality of microphone arrays on the pipeline, gradually reducing the distance between adjacent microphone arrays in the laying length direction of the pipeline, and non-uniformly arranging the microphone arrays, numbering and recording each group of microphone array and calibrating the spatial position of each group of microphone array; the microphone array collects sound wave signals, and multi-channel parallel phase error optimization processing is carried out through the conditioning circuit; monitoring and judging the acquired sound wave signal, and extracting and enhancing the leakage sound wave signal; the method comprises the following steps of: enhancing an array signal of a single station by adopting a beam forming method, respectively calculating leakage signal generation ...

Подробнее
Номер записи: 6
11-08-2023 дата публикации

Air pipe leakage signal detection method based on non-uniform frequency spectrogram

Номер: CN116577037A
Автор: SHI JIAN, LV PIN, JIN SHENGQI, MA CHEN
Принадлежит:

The invention provides an air pipe leakage signal detection method based on a non-uniform frequency spectrogram. The method comprises the following steps: S1, collecting air pipe leakage sound or vibration data; s2, performing high-pass filtering on the acquired signal to suppress low-frequency noise; s3, carrying out fast Fourier transform on the acquired signal to find a high-frequency key feature interval; s4, performing non-uniform frequency expansion on the frequency domain signal to generate a spectrogram expressed by non-uniform frequency, processing characteristic signals in different frequency intervals by adjusting function parameters, and extracting key characteristics of the signals; and S5, constructing a DA-YOLO5 neural network model for training, and obtaining an air duct leakage signal detection model. According to the air pipe leakage signal detection method based on the non-uniform frequency spectrogram, the spectrogram expressed by the non-uniform frequency is generated ...

Подробнее
Номер записи: 7