The blind area of automotive OBD systems is mainly influenced by the electronic connecting and wiring technology, quality of sensors, performance of actuators and grounding practice.
汽车OBD系统产生的盲区主要受电子连接及布线技术、汽车传感器质量和执行器性能、汽车接地技术等因素的影响。
According to related codes and standards the design method and some practice problems of grounding are discussed, combined with working principle of grounding of instrumentation and control system.
结合仪表及控制系统接地的工作原理，根据有关规范，讨论了接地工程的设计方法和一些实际问题。
The article introduces voltage unbalance of neutral non-grounding system, analyzes the cause of voltage unbalance. It is valuable on fault analysis in practice.
介绍了中性点不接地系统的几种电压不平衡现象，分析了不平衡现象产生的原因，对于运行中的故障分析具有一定的指导意义。
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