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增量调制和脉冲调频是两种不同的脉冲调制方式,应用这两种方式可有效地对次声频信号作调制解调。本文介绍这两种方式的原理并根据它的基本原理设计出相应的电路,用以广泛应用的漂浮式波浪仪的调制解调。这将给由传感器把波高转换成电量的传输和记录带来极大的方便。这些电路也可应用于测量其它具有次声频的海洋参数场合,也可作为磁带记录仪的附属设备,尤其是增量调制可实现多路传输,这对直接或遥测海洋参数无疑有着重要意义。
Incremental modulation and pulse FM are two different pulse modulation methods, the application of these two methods can be effective on the secondary audio signal modulation and demodulation. This article describes the principles of these two approaches and based on its basic principles to design the corresponding circuit for the widely used modulation and demodulation of floating wave instrument. This will greatly facilitate the transmission and recording of the wave height converted to electricity by the sensor. These circuits can also be used to measure other infrasonic ocean parameters, as well as ancillary equipment for tape recorders. In particular, incremental modulation enables multiplexing, which undoubtedly makes sense for direct or telemetric ocean parameters.