Spacecraft test circuit

A technology for testing circuits and gate circuits, applied in the direction of measuring electricity, measuring electrical variables, instruments, etc., can solve the problems of not having multi-channel complex logic relations, and the test circuit cannot meet the requirements of spacecraft testing, etc., to achieve strong anti-interference, Guarantee the effect of service life and accuracy

Active Publication Date: 2018-04-06
BEIJING SPACE TECH RES & TEST CENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is no isolation means in the circuit of the existing test board, and there is no complex logic relationship of multi-channel
Therefore, none of the test circuits on the existing test boards can meet the test requirements for spacecraft

Method used

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  • Spacecraft test circuit
  • Spacecraft test circuit
  • Spacecraft test circuit

Examples

Experimental program
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Effect test

Embodiment approach

[0043] combine figure 1 and figure 2 As shown, according to an embodiment of the present invention, the isolation circuit 1 includes a first isolation sub-circuit 10 and a second isolation sub-circuit 11 . In this embodiment, the first isolation sub-circuit 10 and the second isolation sub-circuit 11 are independent of each other. Each independent isolation sub-circuit receives an independent input signal respectively. Such as image 3 As shown, the first input signal A is input into the first isolation sub-circuit 10 , and the second input signal B is input into the second isolation sub-circuit 11 .

[0044] combine figure 2 and image 3As shown, the negative output terminal outputting the first input signal A is connected to the first positive input terminal 10a of the first isolation subcircuit 10, and the positive output terminal outputting the first input signal A is connected to the first Negative input terminal 10b is connected. The positive output terminal that...

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Abstract

The invention relates to a spacecraft test circuit comprising an isolation circuit having an input end used for receiving input signals; a delay circuit having an input end connected with the output end of the isolation circuit; a driving circuit having an input end connected to the output end of the delay circuit; an event timer having an input end connected to the output end of the driving circuit. The input signals are isolated by the isolation circuit so as to be completely isolated from subsequent circuits, thereby further ensuring the safety of the entire test circuit. By using optical-coupler isolation, the input signals are completely isolated from the circuits behind the isolation circuit. The electrical isolation between a spacecraft test point and a ground test system is achieved during the ground test of the spacecraft. The safety of the spacecraft's internal circuits is guaranteed during the ground test.

Description

technical field [0001] The invention relates to a test circuit, in particular to a test circuit for spacecraft. Background technique [0002] During spacecraft testing, some key timing signals will be downloaded to ground testing equipment in the form of multi-channel pulse signals for measurement. The ground needs to measure the sending of each channel signal and the timing of the signal occurrence. Due to the safety requirements of the spacecraft, when testing these pulse signals, it is necessary to ensure the electrical isolation between the spacecraft measurement point and the ground test system. [0003] At present, most of the general-purpose pulse signal test circuits adopt single-channel pulse counting circuits, and the test circuits on some special-purpose pulse signal test circuits realize the counting function between multiple channels. However, there is no isolation means in the circuit of the existing test board, and there is no complex logic relationship of m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/00
CPCG01R31/00
Inventor 杨枫任亮刘武通
Owner BEIJING SPACE TECH RES & TEST CENT
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