论文部分内容阅读
在恶劣的操作环境下,为增强抗干扰能力,用频率法进行数据传输已被证明十分有效。这种方法是将被测参数经过转换电路直接变为一个交流电压频率。频率的高低代表了被测参数的大小。例如为了测海水的一些物理量,把传感器放入水中,此传感器把物理量变换成频率,船上的接收仪器,主要就是一个计数器,将反映被测参数比的频率或周期测出。以下简要介绍这种仪器的工作原理。
In the harsh operating environment, to enhance the anti-interference ability, the frequency method of data transmission has proved to be very effective. This method is the measured parameters through the conversion circuit directly into an AC voltage frequency. The level of the frequency represents the size of the measured parameters. For example, in order to measure some physical quantities of seawater, the sensor is put into the water. The sensor converts the physical quantity into frequency. The receiving instrument on the ship is mainly a counter which will measure the frequency or period of the measured parameter ratio. The following briefly describes how this instrument works.