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1、前言利用数字技术的设备愈来愈多地正为工业厂家所采用,这是因为数字设备往往胜过常规的模拟设备。一般来说,数字设备响应快,抗扰性强,不易受元件漂移的影响,适应性也比较强,然而其费用与模拟设备大致相同。 2、数字设备的优点从电子学上讲,数字设备在有规律的时间间隔内取样输入信号。该方法通常给出以微秒而不是秒计的时间常数。这种较短的时间常数意味着要更精确地测量高频信号和捕获持续时间较短的瞬变过程(图1)。取得的数
1. INTRODUCTION Devices using digital technologies are increasingly being adopted by industrial manufacturers because digital devices tend to outperform conventional analog devices. In general, digital devices respond fast, strong immunity, less susceptible to component drift, adaptability is also relatively strong, but the cost of analog devices and roughly the same. 2, the advantages of digital devices Electronically, digital devices sample input signals at regular intervals. This method usually gives a time constant in microseconds instead of seconds. This shorter time constant means measuring the high-frequency signal more accurately and capturing transient processes with shorter durations (Figure 1). The number of acquisitions