in-circuit test

Most in-circuit test fixtures use spring-loaded probes and are vacuum actuated.

很多 在线 测试固定装置是带有弹簧的探针或者采用真空启动的.

Second, the hardware circuits designs of each part belong to system are expounded in detail, including four sections consist of the key control module, in-circuit test unit, relay array and needle-bed.

其次，详细论述了系统各组成部分的硬件电路设计，包括核心控制模块、路内测试单元、继电器阵列和针床四个部分。

The difficulty of which is the design of in-circuit test unit, three-wire test method and six-wire test method are used to solve effectively the key problem that isolates measured components from others on measured electronic function module in the paper.

其中，路内测试单元的设计是难点，本文采用三线测试法和六线测试法有效地解决了被测器件与电子功能模件上其他器件隔离的关键问题。