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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

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Мониторинг СМИ

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

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Применить Всего найдено 16. Отображено 16.
18-02-2015 дата публикации

Square wave vector lock-in and amplification method for increasing signal-to-noise ratios of atomic frequency scale query signals

Номер: CN104363017A
Автор: WANG JI, CHEN JIANG, CHENG DAPENG, MA YINGUANG, ZHU HONGWEI, YUAN ZHENGNAN, HUANG LIANGYU, ZHENG NING, GAO WEI, ZHANG DIXIN, LI DETIAN, LIU ZHIDONG
Принадлежит:

The invention discloses a square wave vector lock-in and amplification method for increasing signal-to-noise ratios of atomic frequency scale query signals. The square wave vector lock-in and amplification method has the advantages that frequency modulation flicker noise can be lowered, equivalent noise bandwidths can be reduced, the signal-to-noise ratios of the atomic frequency scale query signals can be increased, and accordingly the stability of cesium atomic frequency scales can be improved; the query signals are extracted from background noise by the aid of low-pass filtering links in a lock-in amplifier, so that the signal-to-noise ratios of the query signals can be increased; the amplitude of the orthogonal vector lock-in amplifier is computed, so that amplitude errors can be accurately acquired during multi-point frequency modulation, the computation precision can be improved, and the square wave vector lock-in and amplification method is favorable for improving the accuracy of ...

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Номер записи: 1
24-12-2014 дата публикации

Method for purifying metals through vacuum distillation

Номер: CN104232914A
Автор: MA YINGUANG, CHEN JIANG, WANG JI, FENG YAN, CHENG DAPENG, YUAN ZHENGNAN, ZHU HONGWEI, HUANG LIANGYU, ZHENG NING, GAO WEI, YANG JUN
Принадлежит:

The invention relates to a method for purifying metals through vacuum distillation, belonging to the field of vacuum metallurgy. According to the method, the grade of distillation can be flexibly increased or decreased according to the purity requirement of the purified metals as required, to obtain metals with different purities; according to the method, a device for purifying metals through vacuum distillation is adopted and consists of a vacuum system, a flow rate-controlled directional distillation system and a control system, a distiller in the device adopts a flow rate-controlled directional distiller consisting of a distiller container, a distillation pipe, a control rod, a magnetic material and a magnet, the closing degree of a ground glass conical valve can be flexibly adjusted by vertically moving the magnet, so that the vacuum degree of a space between the distillation pipe and the control rod is adjusted. The method is excellent in vacuum purifying effect to metals with low ...

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Номер записи: 2
16-06-2010 дата публикации

Method for calibrating direction gage by utilizing directional molecular flow

Номер: CN0101458143B
Автор: SUN HAI, SHENG XUEMIN, ZHAO LAN, MA YINGUANG, CHENG YONGJUN, LI DETIAN, LU YAOWEN, ZHANG DIXIN, HAI SUN, XUEMIN SHENG, LAN ZHAO, YINGUANG MA, YONGJUN CHENG, DETIAN LI, YAOWEN LU, DIXIN ZHANG
Принадлежит:

The invention relates to a method used for correcting a direction gauge by directional molecular flow, belonging to the technical field of vacuum measurement. In the method, firstly, a simple gas is infused into a pressure stabilizing chamber, the gas flows to an upstream chamber at constant-rate of flow, and then directional molecular flow is formed between a small hole and a pumping hole, wherein, the small hole is arranged between the upstream chamber and a correction chamber. Upstream chamber pressure Pf is measured, standard pressure of a direction gauge balance chamber is obtained, and amodifying factor p0/p of the direction gauge is worked out. The process is repeated, and an average value is worked out according to a plurality of modifying factors p0/p of the direction gauge, andthen the direction gauge is corrected. The method provided by the invention for correcting the direction gauge ensures high correction accuracy and can make sure that the corrected direction gauge canmeet ...

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Номер записи: 3
24-12-2014 дата публикации

Device for purifying metal by vacuum distillation

Номер: CN104232913A
Автор: MA YINGUANG, CHEN JIANG, WANG JI, FENG YAN, CHENG DAPENG, YUAN ZHENGNAN, ZHU HONGWEI, HUANG LIANGYU, ZHENG NING, GAO WEI, YANG JUN
Принадлежит:

The invention relates to a device for purifying a metal by vacuum distillation and belongs to the field of vacuum metallurgy. A distiller of the device adopts a flow control directional distiller comprising a distiller container, a distillation pipe, a control rod, a magnetic substance and a magnet, wherein the closing degree of a glass ground conical valve can be flexibly regulated by moving the magnet up and down, and thus the vacuum degree of a space between the distillation pipe and the control rod can be regulated. The invention further relates to the device for purifying the metal by vacuum distillation, which comprises a vacuum system, a flow control directional distillation system and a control system, and the device can flexibly increase or decrease the number of stages of the multi-stage flow control directional distiller according to the purity requirements of the metal to be purified so as to achieve the purpose of obtaining the metal with different purities. The device has ...

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Номер записи: 4
08-09-2010 дата публикации

Direction gage calibration device

Номер: CN0101458144B
Автор: MA YINGUANG, CHENG YONGJUN, SUN HAI, ZHANG DIXIN, LI DETIAN, FENG YAN, SHENG XUEMIN, LU YAOWEN, YINGUANG MA, YONGJUN CHENG, HAI SUN, DIXIN ZHANG, DETIAN LI, YAN FENG, XUEMIN SHENG, YAOWEN LU
Принадлежит:

The invention relates to a calibrating device of a direction gauge, belonging to the filed of metrological science. The calibrating device of the direction gauge comprises an air inlet system, a calibrating room, a direction gauge control system and an extract system. The top end of the calibrating room is connected with an upstream room of the air inlet system by a gas-filled flange; the bottom end of the calibrating room is connected with a high suction speed molecular pump by an air extracting flange; support frames of a vacuum gauge, a monitoring gauge and the direction gauge are fixed onthe calibrating room by standard CF flange interfaces; the support frame marked with scale is vertically fixed with the support frame of the direction gauge inside the calibrating room; the directiongauge is fixed on the support frame marked with scale; and a magnetic fluid sealing drive mechanism and a stepping motor are fixed outside the calibrating room by the support frame of the direction gauge ...

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Номер записи: 5
10-06-2015 дата публикации

Calibration method for temperature and resistance value of cesium beam tube thermal resistor

Номер: CN104697670A
Автор: CHENG DAPENG, CHEN JIANG, MA YINGUANG, WANG JI, HUANG LIANGYU, YANG JUN, ZHENG NING
Принадлежит:

The invention provides a calibration method for temperature and resistance value of a cesium beam tube thermal resistor capable of calibrating the relationship between the temperature and resistance value of a thermal resistor in a vacuum seal cesium beam tube. The method comprises the following steps: firstly placing the cesium beam tube in a vacuum chamber, executing vacuum pumping and protecting operation to the vacuum chamber, heating the cesium beam tube, after heating to required temperature, recording the value of the temperature and the thermal resistor, adjusting the temperature and repeatedly executing the step to obtain the corresponding relationship between the temperature and resistance of the thermal resistor in the cesium beam tube. The thermocouple is not needed, so that the fault rate of the cesium beam tube caused by the change of the insulation characteristic of the thermocouple can be eliminated and the damage to the cesium furnace during the mounting process of the ...

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Номер записи: 6
24-12-2014 дата публикации

Sealing method for cesium foam of cesium-beam tube

Номер: CN104227258A
Автор: CHEN JIANG, MA YINGUANG, WANG JI, ZHANG DIXIN, LI DETIAN, LIU ZHIDONG, YUAN ZHENGNAN, ZHU HONGWEI, CHENG DAPENG, HUANG LIANGYU, ZHENG NING, GAO WEI
Принадлежит:

The invention discloses a sealing method for cesium foam of a cesium-beam tube. According to the sealing method provided by the invention, the sealing problem of metal cesium foam of the cesium-beam tube is effectively solved, the sealing effect at a cesium foam position is increased, the step is simple and the method is easily realized. According to the invention, a three-sealing mode is adopted, so that the sealing effect of the cesium foam position is greatly enhanced. Firstly, a cesium-filled pipe wall is flattened, the stress possibly generated at a cutter opening is eliminated and air is prevented from entering into the cesium foam so that the metal cesium is prevented from being polluted; the cesium foam is cut off at a flattened part and the cutter opening is formed, and then the cesium foam is sealed for the first time; the flattened part is spot-welded, the pipe wall is fused, a sealing effect is achieved, and the sealing effect is prevented from being influenced by the steam ...

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Номер записи: 7
10-06-2015 дата публикации

Vacuum weak ion beam flux collecting and amplifying device

Номер: CN104702230A
Автор: WANG JI, MA PEI, CHEN JIANG, CHENG DAPENG, MA YINGUANG, YUAN ZHENGNAN, HUANG LIANGYU, ZHENG NING, ZHU HONGWEI, GAO WEI, ZHANG DIXIN, LI DETIAN, LIU ZHIDONG
Принадлежит:

The invention discloses a vacuum weak ion beam flux collecting and amplifying device which comprises a high vacuum chamber arranged at the upper part of an electromagnetic shielding box, wherein a Faraday shield cylinder is arranged inside the high vacuum chamber; the electromagnetic shielding box is internally provided with a pA signal bias amplification circuit; the Faraday shield cylinder is connected with the pA signal bias amplification circuit through a double-shielding connector; an insulating device is arranged at the connecting part of the high vacuum chamber and the electromagnetic shielding box. The vacuum weak ion beam flux collecting and amplifying device has the advantages that due to the adoption of direct circuit amplification, the problems that technical indexes of an electron multiplier are not qualified and the electron multiplier is short in service life and not applicable to long-term operation are solved, the Faraday shield cylinder is arranged inside the high vacuum ...

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Номер записи: 8
01-07-2015 дата публикации

Capillary porous medium liquid absorption core

Номер: CN104741045A
Автор: YANG JUN, CHEN JIANG, WANG JI, ZHANG DIXIN, MA YINGUANG, CHENG DAPENG, ZHENG NING
Принадлежит:

The invention belongs to the technical field of liquid overflow prevention, and particularly relates to a capillary porous medium liquid absorption core applied to a liquid metal atom source. The capillary porous medium liquid absorption core is formed by sequentially connecting an evaporation section, a backflow section and a nozzle section, wherein the evaporation section consists of a first porous medium with the pore diameter of 100-160 microns, with the porosity of 70%-90% and with the liquid drop contact angle of 0 degree-5 degrees; the backflow section consists of a second porous medium with the pore diameter of 60-100 microns, with the porosity of 60%-80% and with the liquid drop contact angle of 5 degrees-90 degrees; the nozzle section consists of a third porous medium with the pore diameter of 10-60 microns, with the porosity of 40%-60% and with the liquid drop contact angle of 0 degree-90 degrees; the backflow section is internally provided with a through hole, and two ends of ...

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Номер записи: 9
04-03-2015 дата публикации

Magnetic separation-state cesium-beam tube state-selection magnet component assembly system and assembly detection method

Номер: CN104384925A
Автор: YUAN ZHENGNAN, CHEN JIANG, WANG JI, CHENG DAPENG, MA YINGUANG, ZHU HONGWEI, HUANG LIANGYU, ZHENG NING, GAO WEI
Принадлежит:

The invention discloses a magnetic separation-state cesium-beam tube state-selection magnet component assembly system. The magnetic separation-state cesium-beam tube state-selection magnet component assembly system is used for assembling magnetic separation-state cesium-beam tube state-selection magnet components and integrating the assembly and detection, and is simple in structure and reliable and high efficient in assembling. The assembly system comprises an assembly soleplate, a limiting baffle plate, a pole end positioning column, a buffer plate, a positioning screw and a supporting leg, wherein the position and size of each part of the assembly system are determined according to the size and matching requirement of the state-selection magnet components, the structure is simple, the cost is low, the assembly operation flow is simplified in the assembling process, the probability that the magnet steel is damaged in the assembly process can be reduced, the distribution consistency of ...

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Номер записи: 10
10-06-2015 дата публикации

Method for preparing high-purity metal cesium by using molecular distillation apparatus

Номер: CN104694763A
Автор: MA YINGUANG, WANG JI, CHEN JIANG, CHENG DAPENG, HUANG LIANGYU, ZHU HONGWEI, ZHENG NING, YANG JUN, LIU SUMIN
Принадлежит:

The invention belongs to the technical field of metal purification, and particularly relates to a method for preparing high-purity metal cesium by using a molecular distillation apparatus. The method comprises the following steps: industrial-grade metal cesium (95%) is pretreated, and subjected to vacuum encapsulation into a vacuum feeder, wherein the metal cesium purity reaches 99%; the metal cesium subjected to primary purification is delivered to a distributor of a knifing molecular distillation apparatus via the vacuum feeder, uniformly enters a knifing device through distribution holes and forms a uniform liquid film on the evaporation wall surface; under the conditions that the distillation temperature is 250 DEG C, the vacuum degree is 1*10<-5>Pa and the rotation speed of the servomotor is 250-500 r/min, the metal cesium vapor is distilled off from the evaporation surface and condensed on the surface of a condensation tube by molecular motion, and the condensate flows downwards along ...

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Номер записи: 11
21-01-2015 дата публикации

Method for improving stability of resistance value of thermistor in vacuum environment

Номер: CN104299737A
Автор: ZHENG NING, CHEN JIANG, WANG JI, ZHU HONGWEI, CHENG DAPENG, MA YINGUANG, HUANG LIANGYU, YUAN ZHENGNAN, GAO WEI
Принадлежит:

The invention discloses a method for improving the stability of the resistance value of a thermistor in the vacuum environment. After the method is adopted, the stability of the resistance value of the thermistor can be improved in the vacuum environment. The method comprises the steps of firstly, building a high-temperature degassing system, and then removing the gas left in the resistor by high-temperature baking degassing in the high-temperature degassing system to reduce the change of the resistance value due to the temperature change caused by gas volatilization; therefore, the stability of the thermistor is improved.

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Номер записи: 12
17-06-2009 дата публикации

Direction gage calibration device

Номер: CN0101458144A
Автор: LU YAOWEN, ZHANG DIXIN, LI DETIAN, CHENG YONGJUN, FENG YAN, SUN HAI, SHENG XUEMIN, MA YINGUANG, YAOWEN LU, DIXIN ZHANG, DETIAN LI, YONGJUN CHENG, YAN FENG, HAI SUN, XUEMIN SHENG, YINGUANG MA
Принадлежит:

The invention relates to a calibrating device of a direction gauge, belonging to the filed of metrological science. The calibrating device of the direction gauge comprises an air inlet system, a calibrating room, a direction gauge control system and an extract system. The top end of the calibrating room is connected with an upstream room of the air inlet system by a gas-filled flange; the bottom end of the calibrating room is connected with a high suction speed molecular pump by an air extracting flange; support frames of a vacuum gauge, a monitoring gauge and the direction gauge are fixed on the calibrating room by standard CF flange interfaces; the support frame marked with scale is vertically fixed with the support frame of the direction gauge inside the calibrating room; the direction gauge is fixed on the support frame marked with scale; and a magnetic fluid sealing drive mechanism and a stepping motor are fixed outside the calibrating room by the support frame of the direction gauge ...

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Номер записи: 13
24-12-2014 дата публикации

Variable parameter testing system for cesium source emitting beam intensity

Номер: CN104237927A
Автор: ZHU HONGWEI, CHEN JIANG, WANG JI, CHENG DAPENG, YUAN ZHENGNAN, MA YINGUANG, ZHENG NING, HUANG LIANGYU, LI DETIAN, ZHANG DIXIN
Принадлежит:

The invention discloses a variable parameter testing system for cesium source emitting beam intensity. By means of the variable parameter testing system for the cesium source emitting beam intensity, the distance and the inclined angle between a detector and an outlet of a collimator can be accurately controlled, so that the analysis accuracy of the cesium source emitting beam intensity is improved, and meanwhile cesium beam pollution is reduced. The distance and the included angle between the detector and the cesium source are changed through the position between a fixed support and a movable support so that the coordinates of the detector relative to the cesium source can be measured by using a micrometer or other measurement tools, the distance and the included angle between the detector and the collimator can be conveniently accurately obtained, the critical problems such as displacement limitation and inclined angle calculation of the detector are solved, and thus the analysis accuracy ...

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Номер записи: 14
17-06-2009 дата публикации

Method for calibrating direction gage by utilizing directional molecular flow

Номер: CN0101458143A
Автор: LU YAOWEN, ZHANG DIXIN, LI DETIAN, CHENG YONGJUN, ZHAO LAN, SUN HAI, MA YINGUANG, SHENG XUEMIN, YAOWEN LU, DIXIN ZHANG, DETIAN LI, YONGJUN CHENG, LAN ZHAO, HAI SUN, YINGUANG MA, XUEMIN SHENG
Принадлежит:

The invention relates to a method used for correcting a direction gauge by directional molecular flow, belonging to the technical field of vacuum measurement. In the method, firstly, a simple gas is infused into a pressure stabilizing chamber, the gas flows to an upstream chamber at constant-rate of flow, and then directional molecular flow is formed between a small hole and a pumping hole, wherein, the small hole is arranged between the upstream chamber and a correction chamber. Upstream chamber pressure Pf is measured, standard pressure of a direction gauge balance chamber is obtained, and a modifying factor p0/p of the direction gauge is worked out. The process is repeated, and an average value is worked out according to a plurality of modifying factors p0/p of the direction gauge, and then the direction gauge is corrected. The method provided by the invention for correcting the direction gauge ensures high correction accuracy and can make sure that the corrected direction gauge can ...

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Номер записи: 15
14-01-2015 дата публикации

Preparation method of Ag-Mg alloy type MgO film for high-energy particle bombardment

Номер: CN104278230A
Автор: CHENG DAPENG, MA YINGUANG, WANG JI, CHEN JIANG, HUANG LIANGYU, ZHENG NING, GAO WEI, YUAN ZHENGNAN, ZHU HONGWEI
Принадлежит:

The invention discloses a preparation method of an Ag-Mg alloy type MgO film for high-energy particle bombardment, aiming to solve the problems that the MgO film is thin and residual Mg is insufficiently oxidized. The preparation method comprises the following steps: firstly oxidizing Mg in the Ag-Mg alloy by adopting CO2, wherein enough large CO2 molecules cannot permeate inside the Ag-Mg alloy, so that the fast growth of a surface film and migration of Mg inside to the surface can be accelerated; then continuously oxidizing residual Mg by using O2, wherein the O2 molecules can permeate the interior of the Ag-Mg alloy, and the residual Mg inside can be thoroughly oxidized. The preparation method has the advantages that the thickness of the MgO film can be increased, and the problem that the secondary emission coefficient of the MgO film is reduced because of the film pollution caused by residual Mg can be avoided; furthermore, preparation equipment used in the method is an oil-free system ...

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Номер записи: 16