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COTS production board level accumulated dose test method

A test method and technology of total dose applied in the field of space environmental engineering to achieve the effect of improving reliability, saving manpower and ensuring adequacy

Active Publication Date: 2016-11-16
AEROSPACE DONGFANGHONG DEV LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In view of the above technical problems, the present invention discloses a board-level total dose test method for COTS products, which effectively solves the complex process of re-establishing a test system for traditional device-level tests, and aims at the situation that most devices on the entire circuit board do not have anti-total dose indicators Can save a lot of manpower and material resources

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  • COTS production board level accumulated dose test method
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  • COTS production board level accumulated dose test method

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Embodiment 1

[0031] A board-level total dose test method for COTS products, such as figure 2 As shown, mainly for the case where the total environmental dose is ≤5 K rad (Si), the following steps are included:

[0032] Step S1: first obtain the dose-depth curve according to the orbital parameters and lifetime of the satellite, and use the three-dimensional total dose analysis to obtain the maximum total environmental dose value and the maximum total environmental dose value of the internal components of extraterrestrial electronic products, and use the maximum total environmental dose value as Test radiation dose;

[0033] Step S2: Build a test system, fix the PCB board 1 of the COTS product or the PCB board 1 of the COTS product and the casing together on the bracket 2, and make the plane of the PCB board 1 perpendicular to the ground and facing the direction of the radiation source 3, Such as figure 1 As shown, the radiation source 3 is cobalt 60; the inside of the casing contains les...

Embodiment 2

[0037] A board-level total dose test method for COTS products, such as image 3 As shown, mainly for the case where the total environmental dose is >5 K rad (Si), the following steps are included:

[0038] Step S1: First obtain the dose-depth curve according to the orbital parameters and lifetime of the satellite, and use the three-dimensional total dose analysis to obtain the maximum total environmental dose value and the maximum total environmental dose of the internal components of extraterrestrial electronic products, and determine the test radiation dose;

[0039] Step S2: Build a test system, fix the PCB board 1 of the COTS product or the PCB board 1 of the COTS product and the casing together on the bracket 2, and make the plane of the PCB board 1 perpendicular to the ground and facing the direction of the radiation source 3, Such as figure 1 As shown, the radiation source 3 is cobalt 60; the inside of the casing contains less than 3 circuit boards, and the size of the c...

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Abstract

The invention provides a COTS production board level accumulated dose test method. The COTS production board level accumulated dose test method comprises steps that three-dimensional accumulated dose analysis is employed to acquire a largest environment accumulated dose value which is taken as a test irradiation dose; a test system is established, a PCB of a COTS product is fixed on a support, a plane of the PCB is made to be perpendicular to the ground and just points to a direction of a radioactive source, and the PCB of the COTS product is connected with the test system; the COTS product is made to be in a live-line state, irradiation is carried out, testing on performance parameters of the COTS product is regularly carried out, and power-off restart is carried out after each test; after a test irradiation dose is realized, testing on the performance parameters of the COTS product is carried out, if the COTS product is qualified according to testing, the process is finished; if the COTS product is not qualified according to testing, the COTS product is made to stay in a live-line state, backout operation is carried out, and testing on the performance parameters is carried out. The COTS production board level accumulated dose test method is advantaged in that test verification sufficiency is guaranteed, reliability of the test data is improved, and manpower and material resources are saved.

Description

technical field [0001] The invention belongs to the technical field of space environment engineering, and in particular relates to a board-level total dose test method for COTS products, in particular a total dose screening method for COTS (Commercial off-the-shelf, commercial shelf) electronic products used in spaceflight. Background technique [0002] COTS products are widely used in the ground environment, and usually have better performance and lower prices than aerospace products of the same period. Due to cost and performance considerations, microsatellites use a large number of COTS products, but COTS products are usually only used on the ground, and there is no space anti-total dose index, and the total dose effect is one of the important factors that limit the space application of COTS products. At present, the anti-total dose test method of components is relatively mature. In the past, the aerospace products first carried out the total dose test on the components t...

Claims

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Application Information

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IPC IPC(8): G01R31/00
CPCG01R31/00
Inventor 张振力薛力军李春汪茅姜文志唐心春
Owner AEROSPACE DONGFANGHONG DEV LTD