A radiation environment monitoring system based on COTS devices

Abstract

The application discloses a kind of radiation environment monitoring systems based on COTS device, including COTS device array, comprehensive monitoring unit, the COTS device array is composed of multiple COTS devices sensitive to irradiation environment, the COTS device array is electrically connected with comprehensive monitoring unit by cable, the comprehensive monitoring unit is directed to the working state readout circuit of this kind of COTS device, and the working condition of COTS device array is monitored in real time.In the present application, the working state of multiple COTS devices in space irradiation environment is monitored by comprehensive monitoring unit, the severity of space overall irradiation condition is comprehensively evaluated, and the influence parameters of space irradiation environment and effect on the working state and life of COTS device can be directly obtained.Compared with traditional sensor detection, the detection system composed of COTS device array and comprehensive monitoring unit has the advantages of short cycle, low cost and high integration.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of irradiation environment monitoring, in particular to a radiation environment monitoring system based on COTS devices. BACKGROUND

[0002] Spacecraft will suffer the effects of various space irradiation environments during on-orbit operation, including various particle radiation (electrons, protons, heavy ions, etc.), electromagnetic radiation, etc., which can cause spacecraft to produce single event effects, ionizing total dose effects, surface charge and discharge effects, internal charge effects, etc., and is the main source of on-orbit failure or even failure of spacecraft, seriously affecting the on-orbit safety and reliability of spacecraft; there are three important high-energy particle environmental factors in space radiation: radiation belt trapped particles, solar cosmic rays, and galactic cosmic rays. High-energy particles trapped by the radiation belt will continuously penetrate the satellite and deposit energy inside the device, causing cumulative total dose effects; high-energy protons or ions produced by solar proton events or galactic cosmic rays can penetrate the barrier of the magnetosphere and cause harm to low-orbit satellites.

[0003] At present, the commonly used method for measuring space particles at home and abroad is based on the sensor mode, for example, the semiconductor telescope measurement method is a commonly used method for measuring medium and high-energy particles, and the instrument sensor adopts two to three semiconductor detectors plus electronic circuit for measurement. When high-energy particles are shot into the sensor through the collimator, energy is deposited in each semiconductor detector, and corresponding electron-hole pairs are generated in an ionization manner. These electron-hole pairs are collected to the output end under the action of a high-voltage electric field and generate a charge pulse. The height of the charge pulse is proportional to the energy deposited by the particles in the semiconductor detector. According to the pulse height of the semiconductor detector, the signal is analyzed by threshold discrimination and coincidence anticoincidence processing, and the particle energy spectrum information can be obtained.

[0004] However, the mode of using a large number of space-grade components for spacecraft development has the disadvantages of high cost, long development cycle, and insufficient performance of components, and the traditional space irradiation monitoring system uses a sensor to monitor a certain irradiation index or effect, and measures the absolute value of the irradiation index, and cannot obtain more accurate measurement data. SUMMARY

[0005] The present application relates to the technical field of irradiation environment monitoring, in particular to a radiation environment monitoring system based on COTS devices.

[0006] In order to achieve the above-mentioned purpose, the present application adopts the following technical scheme:

[0007] The application discloses a radiation environment monitoring system based on COTS devices, which comprises a COTS device array, a comprehensive monitoring unit, wherein the COTS device array is composed of a plurality of COTS devices sensitive to the irradiation environment, and the COTS device array is electrically connected with the comprehensive monitoring unit through a cable; the comprehensive monitoring unit is provided with a working state readout circuit for the COTS devices, and the working state of the COTS device array is monitored in real time; if the COTS devices work normally, the output results of each COTS device are the same; when the COTS array has different output results, the comprehensive monitoring unit records the number of COTS devices with abnormal output and the duration of continuous work of the COTS devices; and the percentage of COTS devices with abnormal work in a unit time can be used to evaluate the relative severity of the irradiation environment.

[0008] Preferably, the plurality of COTS devices are composed of a plurality of device arrays of the same kind, and the COTS devices can be arranged at any position point of the satellite for irradiation environment monitoring; the number and kind of the arranged COTS devices can be adjusted according to the resources provided by the satellite and the quantitative precision requirement.

[0009] Preferably, the surface of the comprehensive monitoring unit is provided with a radiation-proof coating, so that the comprehensive monitoring unit has the anti-irradiation capability and can work normally in the monitoring process.

[0010] Preferably, the COTS device array, the cable and the comprehensive monitoring unit are externally provided with an instrument shell, which is used for protecting the COTS device array, the cable and the comprehensive monitoring unit and excluding the interference of non-monitoring environmental elements on the monitoring system.

[0011] According to the above technical scheme, the application has the following beneficial effects:

[0012] In the application, the working states of the plurality of COTS devices in the space irradiation environment are monitored by the comprehensive monitoring unit, the overall space irradiation condition is comprehensively evaluated, the influence parameters of the space irradiation environment and effects on the working state and service life of the COTS devices are directly obtained, and compared with the traditional sensor detection, the detection system composed of the COTS device array and the comprehensive monitoring unit has the advantages of short cycle, low cost and high integration. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 Fig. 1 shows a connection structure schematic diagram of the radiation environment monitoring system based on COTS devices according to the embodiment of the application;

[0014] Figure 2 Fig. 2 shows a composition structure schematic diagram of the radiation environment monitoring system based on COTS devices according to the embodiment of the application.

[0015] LEGEND

[0016] 1. COTS device array; 2. cable; 3. integrated monitoring unit; 4. instrument housing. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of the present application.

[0018] Please refer to Figures 1-2 The present application provides a technical solution:

[0019] A radiation environment monitoring system based on COTS devices, comprising a COTS device array 1 and an integrated monitoring unit 3, the COTS device array 1 is composed of a plurality of COTS devices sensitive to the irradiation environment, the COTS device array 1 is electrically connected to the integrated monitoring unit 3 through a cable 2, the integrated monitoring unit 3 is used for real-time monitoring of the working condition of the COTS device array 1, the integrated monitoring unit 3 is provided with a working state readout circuit for the COTS device, and the working condition of the COTS device array 1 is monitored in real time, if the COTS devices work normally, the output results of each COTS device are the same, when the COTS device array 1 has different output results, the integrated monitoring unit 3 records the number of COTS devices with abnormal output and the duration of device continuous operation, and the percentage of COTS devices with abnormal working in a unit time can be used to evaluate the relative severity of the irradiation environment;

[0020] The detection system composed of the COTS device array 1 and the comprehensive monitoring unit 3 includes three working modes, namely, a self-checking mode, a standby mode and a monitoring mode. The comprehensive monitoring unit 3 is powered on first, and after being powered on, it enters the self-checking mode by default. In the self-checking mode, only the comprehensive monitoring unit 3 is powered on, and the COTS device array 1 is not powered on. In the self-checking mode, the state of the comprehensive monitoring unit 3 itself is mainly detected. After the self-checking is completed, the standby mode is entered. In the standby mode, the comprehensive monitoring unit 3 mainly performs self-task maintenance management. When the monitoring mode is entered through an uploaded instruction or by the device itself, the comprehensive monitoring unit 3 performs power-on testing on the COTS device array 1. The comprehensive monitoring unit 3 needs to record the power-on duration, and periodically measure the output of each COTS device. The comprehensive monitoring unit 3 can transmit the working state of each COTS device to the ground through a communication link. According to the COTS device working state monitoring data, the ground personnel can determine the total number of COTS devices that appear abnormal in the testing duration, and analyze the severity of the influence of radiation on the device by combining the COTS device state monitoring data. The percentage of COTS devices that appear abnormal in the radiation environment is used to quantitatively evaluate the radiation condition of the current orbit, especially the influence of radiation on the COTS devices of this type, and to give guidance for using COTS devices on the orbit.

[0021] Specifically, as shown in Figure 1 , the plurality of COTS devices are composed of a plurality of device arrays of the same type. The COTS devices can be arranged at any position point of the satellite for radiation environment monitoring. The number and type of arrangement can be adjusted according to the resources provided by the satellite and the quantitative accuracy requirement.

[0022] Specifically, the surface of the comprehensive monitoring unit 3 has a radiation-proof coating, so that the comprehensive monitoring unit 3 has anti-radiation capability and can work normally in the monitoring process.

[0023] Specifically, as shown in Figure 2 , the COTS device array 1, the cable 2 and the comprehensive monitoring unit 3 are externally provided with an instrument shell 4. The instrument shell 4 plays a protective role for the COTS device array 1, the cable 2 and the comprehensive monitoring unit 3, and at the same time, eliminates the interference of non-monitoring environmental factors on the monitoring system.

[0024] In summary, the radiation environment monitoring system based on COTS devices provided in the embodiment can monitor the working state of a plurality of COTS devices in the space radiation environment through the comprehensive monitoring unit 3, comprehensively evaluate the severity of the overall space radiation condition, and directly obtain the influence parameters of the space radiation environment and effects on the working state and life of the COTS devices. Compared with the traditional sensor detection, the detection system composed of the COTS device array 1 and the comprehensive monitoring unit 3 has the advantages of short cycle, low cost and high integration.

[0025] The foregoing description of the embodiments enables one of ordinary skill in the art to make or use the application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein can be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A radiation environment monitoring system based on COTS devices, characterized in that, The system includes a COTS device array (1) and a comprehensive monitoring unit (3). The COTS device array (1) consists of multiple COTS devices that are sensitive to the irradiation environment. The COTS device array (1) is electrically connected to the comprehensive monitoring unit (3) via a cable (2). The comprehensive monitoring unit (3) is used to monitor the working status of the COTS device array (1) in real time. The current working status of each COTS device is transmitted to the ground. Based on the COTS device working status monitoring data, the ground personnel determine the total number of COTS devices that are abnormal within the test duration. Combined with the status monitoring data of each COTS device, the severity of the irradiation impact on the device is analyzed. The percentage of COTS devices that are abnormal under the irradiation environment is used to quantitatively evaluate the current irradiation situation of the orbit.

2. The radiation environment monitoring system based on COTS device according to claim 1, characterized in that, The multiple COTS devices are composed of an array of the same type of devices.

3. The radiation environment monitoring system based on COTS device according to claim 1, characterized in that, The surface of the integrated monitoring unit (3) has a radiation-proof coating.

4. The radiation environment monitoring system based on COTS device according to claim 1, characterized in that, The COTS device array (1), cable (2), and integrated monitoring unit (3) are equipped with an instrument housing (4).

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