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用微计算机对信号频率进行测量采集是实际中常遇到的,但直接对多通道频率,尤其是超低频信号的测量采集,通常是困难的。为了实际应用,这里介绍一种通用型的低、超低频信号采集系统。该系统已用于一套标准系统中,效果很好,使用可靠,精度高,功耗较小,测量范围宽,对被测频率上限不同的要求可任意组合,抗干扰能力强,对被测信号幅度要求低。
It is often encountered in practice to measure and collect the signal frequency with the microcomputer. However, it is usually difficult to directly measure the multi-channel frequency, especially the ultra-low frequency signal. For practical application, here is a general introduction of low, ultra-low frequency signal acquisition system. The system has been used in a standard system, the effect is good, reliable, high precision, low power consumption, wide measuring range, the upper limit of the measured frequency can be any combination of arbitrary requirements, anti-interference ability, the measured Low signal amplitude requirements.