星上热控回路阻值测试系统设计

Resistance Measurement System Design for Satellite Thermal Control Circuit

摘要:

开发了一种基于虚拟仪器的星上热控回路阻值测试系统。该系统在NI PXI硬件平台下集成了数字万用表和矩阵开关模块，在LabVIEW平台下开发了测控软件。系统通过控制开关切换实现了120个接入点的热控回路绝缘及阻值的快速自动测试，同时具备测试数据管理、报表生成等功能，与标定电阻的对比表明检测结果精确可靠，相对误差小于1%。实际应用表明，该系统集成度高，使用灵活，可极大提高检测效率，节约时间约80%，具有较高工程应用价值。

Abstract:

The design of a resistance measurement system for satellite thermal control circuit based on virtual instrument has been presented in this paper. The digital multi-meter and a matrix switch module are integrated in NI PXI platform, and the software is programmed in Labview development environment. The insulation and resistance measurement of satellite thermal control circuit which contains 120 access points can be implemented quickly and automatically through software controlled switch alternation. Data management and report generation function are also included. The measured results have been proved to be accurate and reliable through comparing with the calibrated resistance, the relative error is less than 1%. The system is highly integrated and flexible to use. It can improve the measurement efficiency, save about 80% test time, and has high application value.