Capacitance pressure transmitter and pressure sensing system
A transmitter and capacitive technology, applied in the field of pressure transmitters and pressure sensing systems, can solve the problems of easily damaged knobs, time-consuming and labor-intensive adjustments, and inconvenient adjustments
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[0037] The pressure sensing system of this embodiment includes a capacitive pressure transmitter and a computer, and the computer provides a zero pressure command or a full pressure command for the capacitive pressure transmitter.
[0038] Specifically, as figure 1 As shown, the capacitive pressure transmitter of this embodiment includes a capacitive differential pressure sensor 1 , a demodulator 2 , an MCU 3 , a HART communication module 4 , an AD421 chip 5 , a temperature sensor 6 and an oscillator 7 .
[0039] Wherein the demodulator 2 is used to convert the capacitance difference generated by the capacitance differential pressure sensor 1 into an analog voltage signal; the MCU3 is used to convert the analog voltage signal output by the demodulator 2 into a digital voltage signal .
[0040] The MCU3 also records the digital voltage signal output by the MCU3 when it receives the zero-voltage command or the full-voltage command based on the zero-voltage command or the full-v...
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