差频解调技术在感应同步器数显表中的实现

Actualization of Demodulation Technology in Inductosyn Data Display Instrument

传统双相激磁感应同步器数显表是直接通过测量感应信号中的相位信息来获取位移数据的,这会造成其抗干扰能力和其检测分辨率不能同时提高的问题。由此,介绍了应用差频解调技术,把原本为感应信号的相位信息转载到某一低频信号上,再把该低频信号作为被测信号来解决问题的原理,并提出了通过以数字与门和滤波器组成的电路模块来实现差频解调技术的具体方法。

Both anti-jamming capability and measuring resolution can't be advanced in the traditional inducto-syn data display instrument of biphase excitation, because it is directly by measuring inducted signal that the data display instrument gains the positional data. In order to solve the problem,the principle of demodulation technology is introduced; that the phase of inducted signal loads certain low-frequency signal and this signal is regarded as measured one, and then, the way to actualize the demodulation technology with the module of AND gate and filter is put forward.