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1.引言 数据采集系统是自动化装置中必不可少的环节,而在工业现场中存在各种各样的干扰。实践证明数据采集系统受到的干扰与系统接地有很大关系。接地往往是抑制干扰的重要手段之一。良好的接地状况可以在很大程度上抑制噪声的耦合,防止外部干扰的侵入,提高系统的抗干扰能力。 2.浮地和共地 在数据采集系统中,直流稳压电源的地线处理有两种方式:浮地和共地。对于一个具体的系统,如何处理直流地才能获得较好的效果,是一个值得探讨
1. INTRODUCTION Data acquisition systems are an integral part of automation devices and present a variety of disturbances in industrial sites. Practice has proved that data acquisition system interference and grounding system has a great relationship. Grounding is often an important means of suppressing interference. Good grounding conditions can largely inhibit the noise coupling to prevent the intrusion of external interference and improve the anti-interference ability of the system. 2. Floating and common ground In the data acquisition system, DC power supply ground treatment in two ways: floating and common ground. For a specific system, how to deal with DC to get better results, it is worth to explore