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系统由多路开关、频率信号预处理电路、可编程频率计以及长城微机系统组成。多路开关的输入来自井下压力温度变送器。后者是一种两线传感器,输出量为压力频率信号和温度频率信号。它的电源由可编程电源提供。在计算机控制下,可编程电源的输出可在一定的电压范围内作上下跳变,其跳变量传至井下,为变送器提供分时测量压力和温度时的切换信号。多路开
The system consists of multiple switches, frequency signal preprocessing circuit, programmable frequency meter and the Great Wall computer system. The input of the multiplexer comes from the downhole pressure and temperature transmitter. The latter is a two-wire sensor, the output pressure and temperature frequency signal frequency signal. Its power is supplied by a programmable power supply. Under computer control, the output of the programmable power supply can jump up and down within a certain voltage range, and its jump variable is transmitted downhole, providing the transmitter with the switching signal when the pressure and temperature are measured in time sharing. More open