CN111060796A - Method for detecting space displacement effect of photosensitive triode - Google Patents
Method for detecting space displacement effect of photosensitive triode Download PDFInfo
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- CN111060796A CN111060796A CN201911262362.7A CN201911262362A CN111060796A CN 111060796 A CN111060796 A CN 111060796A CN 201911262362 A CN201911262362 A CN 201911262362A CN 111060796 A CN111060796 A CN 111060796A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/26—Testing of individual semiconductor devices
- G01R31/2601—Apparatus or methods therefor
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/26—Testing of individual semiconductor devices
- G01R31/2607—Circuits therefor
- G01R31/2637—Circuits therefor for testing other individual devices
Abstract
The embodiment of the invention provides a method for detecting a space displacement effect of a photosensitive triode, which is characterized by comprising the following steps of: step 1: sending the irradiation circuit unit to a beam outlet of a proton accelerator; wherein the irradiation circuit unit includes: the photoelectric conversion unit, the voltage acquisition unit, the bias circuit and at least two photosensitive triode; step 2: the processing working voltage carries out power-on test before irradiation on the irradiation circuit unit to ensure that the irradiation circuit unit can work normally; and step 3: starting a proton irradiation test, and recording sampling voltage in real time through a path gating switching unit in the test process; and 4, step 4: and changing the test conditions, and testing the test data of the photosensitive triode under the proton radiation.
Description
Technical Field
The invention belongs to the technical field of microelectronics and radiation reinforcement resistance, relates to a displacement effect damage effect of a photoelectric device, and particularly relates to a method for detecting a space displacement effect of a photosensitive triode.
Background
The light emitting diode and the phototriode are important devices of the photoelectric encoder. The photoelectric encoder adopts the working principle that a light emitting diode, a phototriode and a corresponding circuit are utilized to carry out photoelectric conversion, and moire fringes formed by a pair of grating pairs are converted into electric signals through a moire fringe technology. When the dynamic and static gratings move relatively, the light and shade of the moire fringes change, and the photoelectric conversion element converts the alternately changed optical signals into alternately changed electric signals and outputs the alternately changed electric signals in the form of digital codes. At present, a large number of aerospace products realize high-precision angle or speed measurement through photoelectric encoders. The phototriode has the main functions of receiving the light intensity of the light emitting diode and converting the light intensity into an electric signal, the working principle is shown in figure 1, the phototriode comprises optical and electrical processes, the displacement effect is the main space radiation effect encountered by the phototriode, and the displacement damage effect of the phototriode is very obvious in some domestic low-orbit satellites, particularly satellites passing through Van-Ehrun belts for a long time, and the normal output of a photoelectric encoder is directly influenced. Unfamiliar test method for the displacement effect of the photosensitive triode is a main factor for restricting the radiation damage mechanism and the reinforcement design of the photosensitive triode. The method has important guiding function for researching the displacement effect test method of the phototriode, and establishing the evaluation technology and test standard of the displacement effect resistance of the photoelectric device, and has important function for the highly reliable application of the photoelectric device on the long-life spacecraft.
Disclosure of Invention
The invention aims to provide a device and a method for detecting the displacement effect of a phototriode, which can detect the output current of the phototriode on line in real time, realize accurate identification and judgment, change trend of the output current of the phototriode under high-energy proton irradiation and failure threshold value under a specific working circuit, and research the relation between the output of the phototriode and the working current and reinforcement measures.
A method for detecting the space displacement effect of a photosensitive triode is characterized by comprising the following steps: step 1: sending the irradiation circuit unit to a beam outlet of a proton accelerator; wherein the irradiation circuit unit includes: the photoelectric conversion unit, the voltage acquisition unit, the bias circuit and at least two photosensitive triode; step 2: the processing working voltage carries out power-on test before irradiation on the irradiation circuit unit to ensure that the irradiation circuit unit can work normally; and step 3: starting a proton irradiation test, and recording sampling voltage in real time through a path gating switching unit in the test process; and 4, step 4: and changing the test conditions, and testing the test data of the photosensitive triode under the proton radiation.
Preferably, the path gating switching unit comprises a channel switching unit, a programmable power supply and a six-bit half-digital voltmeter;
the channel switching unit is used for switching the phototriodes in the irradiation circuit unit; the programmable power supply is used for adding points to the irradiation circuit unit; the six-bit half-digital voltmeter is used for measuring the voltage of the phototriode.
Preferably, said varying the test conditions comprises using different bias circuits.
Preferably, the different bias circuits include a level detection circuit and a differential detection circuit.
Preferably, the changing of the test conditions comprises using different shielding reinforcement means.
Preferably, the different shielding reinforcement modes comprise a metal shielding and a metal and nonmetal mixed shielding.
Preferably, said varying test conditions comprises using protons of different energies.
Drawings
FIG. 1 is a schematic diagram of a photo-electric conversion of a photo-transistor;
FIG. 2 is a block diagram of the system for detecting the displacement effect of the phototriode in an on-line manner according to the present invention;
FIG. 3 is a flow chart and a project of the present invention for the displacement effect test of the phototriode;
FIG. 4 is a flow chart of the present invention.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
The invention provides a method for detecting the space displacement effect of a photosensitive triode, which is characterized by comprising the following steps of: step 1: sending the irradiation circuit unit to a beam outlet of a proton accelerator; wherein the irradiation circuit unit includes: the photoelectric conversion unit, the voltage acquisition unit, the bias circuit and at least two photosensitive triode; step 2: the processing working voltage carries out power-on test before irradiation on the irradiation circuit unit to ensure that the irradiation circuit unit can work normally; and step 3: starting a proton irradiation test, and recording sampling voltage in real time through a path gating switching unit in the test process; and 4, step 4: and changing the test conditions, and testing the test data of the photosensitive triode under the proton radiation.
According to one embodiment of the invention, the path gating switching unit comprises a channel switching unit, a programmable power supply and a six-bit half-digital voltmeter;
the channel switching unit is used for switching the phototriodes in the irradiation circuit unit; the programmable power supply is used for adding points to the irradiation circuit unit; the six-bit half-digital voltmeter is used for measuring the voltage of the phototriode.
According to one embodiment of the invention, the varying the test conditions includes using different bias circuits.
According to one embodiment of the present invention, the different bias circuits include a level detection circuit and a differential detection circuit.
According to one embodiment of the invention, the changing of the test conditions comprises using different shielding reinforcement means.
According to one embodiment of the invention, the different shielding reinforcement means comprise metallic shielding, metallic and non-metallic hybrid shielding.
According to one embodiment of the invention, said varying test conditions comprises applying protons of different energies.
The method of the present invention will be described below with reference to FIGS. 1 to 4.
First, the method of the present invention can be implemented in the apparatus shown in FIG. 2. As shown in fig. 2, a device for detecting the spatial displacement effect of a photosensitive triode, comprising:
the main control computer is communicated with the remote control computer, and acquires and stores the real-time acquisition information of the voltage of the phototriode; and the working state telemetering display is used for the phototriode; and according to the working state remote measurement display of the phototriode, the damage judgment of the displacement radiation damage of the phototriode is carried out;
the remote control computer receives an instruction of the main control computer, and the instruction is used for controlling the path gating switching unit;
the path gating switching unit is used for realizing on-line restarting power on and off of the phototriode and data acquisition switching of the phototriode;
the irradiation unit is positioned at a beam outlet of the proton accelerator and used for realizing sample power supply, photoelectric conversion of the light-emitting diode and the phototriode and sampling of output current of the phototriode; and transmitting the sampled information to the remote control computer.
And the communication between the main control computer and the remote control computer adopts wireless transmission.
And the communication between the main control computer and the remote control computer adopts a router.
The path gating switching unit comprises a channel switching unit and a programmable power supply; the channel switching unit is used for data acquisition switching of the phototriodes; the program-controlled power supply is used for on-line restarting power on and off of the phototriode.
The path gating switching unit further comprises a six-bit half-digital voltmeter used for monitoring the output voltage of the phototriode in real time on line.
According to the process structure and the material characteristics of the device, protons with different energies are adopted to carry out the test. The performance degradation caused by the displacement effect of the photosensitive triode is mainly shown as the gradual reduction of output current, and when the back-end application circuits are different, the current change can show different influences. Designing different types of back-end application circuits and bias circuits, such as a level detection circuit and a differential detection circuit, or only changing rated working current of a phototriode in the same circuit, observing direct output (sampling voltage) of a sample, analyzing responses of the different circuits, carrying out comparison analysis, finding out failure rules, influencing factors and an optimal reinforcement method of a displacement effect of the phototriode, and researching the self displacement effect resistance of the phototriode and the optimal reinforcement method of a satellite product.
FIG. 3 shows the study project and flow chart of heavy ion irradiation test. Proton irradiation tests were performed on a tandem accelerator of the physical institute of Beijing university and a cyclotron of the national institute of atomic energy science, respectively. In order to obtain the displacement effect rule of the photosensitive triode and the output characteristic difference of different bias circuits and shielding reinforcement modes, three particle energies of 10MeV, 30MeV and 50MeV are selected; two bias circuits of level detection and differential detection; metal shielding and metal plus nonmetal "sandwich" shielding.
Combining samples in different states in a radiation unit, and installing and debugging detection equipment; before irradiation, carrying out initial value test on a sample to ensure that a test sample can work normally; after the system is determined to be normal, the sample and the matched circuit are sent into an irradiation chamber; and the working voltage is added for carrying out the power-on test before irradiation, so that the power supply and the time sequence are accurate, and the output voltage of the photosensitive triode is normal. Starting a proton irradiation test, and recording sampling voltage in real time in the test process to judge; the method changes the incident proton energy, the device bias, the shielding and reinforcing state, and researches the non-displacement energy loss rule, the influence of secondary particles, the displacement radiation effect rule and the like generated under the proton radiation of the photosensitive triode.
The invention has the beneficial effects that:
the photosensitive triode is a micro-volume device and only has the size of rice grains, and the invention realizes the verification of the displacement damage effect of the photosensitive triode in the shielding and reinforcing state. The invention realizes the on-line real-time test of the output current of the phototriode, realizes the switching among different samples through the remote control design, and improves the safety and the continuity of the test.
It will be apparent to those skilled in the art that various changes and modifications may be made in the invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (7)
1. A method for detecting the space displacement effect of a photosensitive triode is characterized by comprising the following steps:
step 1: sending the irradiation circuit unit to a beam outlet of a proton accelerator; wherein the irradiation circuit unit includes: the photoelectric conversion unit, the voltage acquisition unit, the bias circuit and at least two photosensitive triode;
step 2: the processing working voltage carries out power-on test before irradiation on the irradiation circuit unit to ensure that the irradiation circuit unit can work normally;
and step 3: starting a proton irradiation test, and recording sampling voltage in real time through a path gating switching unit in the test process;
and 4, step 4: and changing the test conditions, and testing the test data of the photosensitive triode under the proton radiation.
2. The method of claim 1, wherein the path gating switching unit comprises a channel switching unit, a programmable power supply, and a six-bit half-digital voltmeter;
the channel switching unit is used for switching the phototriodes in the irradiation circuit unit; the programmable power supply is used for adding points to the irradiation circuit unit; the six-bit half-digital voltmeter is used for measuring the voltage of the phototriode.
3. The method of claim 1, wherein the changing the test conditions comprises using different bias circuits.
4. The method of claim 3, wherein the different bias circuits comprise a level detection circuit and a differential detection circuit.
5. The method of claim 1, wherein said varying the test conditions comprises using different shielding reinforcement means.
6. The method of claim 5, wherein the different shield reinforcement means comprises metallic shields, mixed metallic and non-metallic shields.
7. The method of claim 1, wherein said varying the test conditions comprises using protons of different energies.
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| CN201911262362.7A CN111060796B (en) | 2019-12-11 | 2019-12-11 | Method for detecting space displacement effect of photosensitive triode |
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| CN201911262362.7A CN111060796B (en) | 2019-12-11 | 2019-12-11 | Method for detecting space displacement effect of photosensitive triode |
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| CN2620327Y (en) * | 2003-05-28 | 2004-06-09 | 上海集成通信设备有限公司 | Contactless RF card carge terminal |
| US20090070568A1 (en) * | 2007-09-11 | 2009-03-12 | Texas Instruments Incorporated | Computation parallelization in software reconfigurable all digital phase lock loop |
| CN202050415U (en) * | 2011-03-24 | 2011-11-23 | 中国科学院等离子体物理研究所 | Optical fiber direct isolation transmission system for analogue signal in fusion device |
| CN103048251A (en) * | 2012-12-28 | 2013-04-17 | 长江水利委员会水文局 | OBS (optical back scattering) working state detector |
| CN106483392A (en) * | 2015-08-24 | 2017-03-08 | 南京理工大学 | A kind of noise analysis approach of photoelectric detective circuit |
-
2019
- 2019-12-11 CN CN201911262362.7A patent/CN111060796B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2620327Y (en) * | 2003-05-28 | 2004-06-09 | 上海集成通信设备有限公司 | Contactless RF card carge terminal |
| US20090070568A1 (en) * | 2007-09-11 | 2009-03-12 | Texas Instruments Incorporated | Computation parallelization in software reconfigurable all digital phase lock loop |
| CN202050415U (en) * | 2011-03-24 | 2011-11-23 | 中国科学院等离子体物理研究所 | Optical fiber direct isolation transmission system for analogue signal in fusion device |
| CN103048251A (en) * | 2012-12-28 | 2013-04-17 | 长江水利委员会水文局 | OBS (optical back scattering) working state detector |
| CN106483392A (en) * | 2015-08-24 | 2017-03-08 | 南京理工大学 | A kind of noise analysis approach of photoelectric detective circuit |
Non-Patent Citations (1)
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| 郝娜: ""空间辐射对光电耦合器性能影响的研究"", 《中国优秀硕士学位论文全文数据库信息科技辑》 * |
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