Digital pressure switch

Abstract

The invention discloses a digital pressure switch, comprising a CPU single chip microcomputer taken as a controller as well as a power supply module, a sensor module and a warning and control module which are connected with the CPU single chip microcomputer, wherein a power driver module which has fast response speed, is provided with a freewheel diode and protects a circuit board from being influenced by a back electromotive force is connected between the CPU single chip microcomputer and the warning and control module; and a signal processing module which can inhibit common-mode interference and improve antijamming capability is connected between the CPU single chip microcomputer and a sensor. The digital pressure switch has the characteristics of good stability, high accuracy and long service life.

Description

technical field [0001] The invention belongs to the field of electronic technology, in particular to a digital pressure switch. Background technique [0002] The pressure switch is a simple pressure control device. When the measured pressure reaches the rated value, the pressure switch can send out an alarm or control signal. Traditional mechanical pressure switches generally have a dead zone of 15% to 30% between the zero point and the full scale set point; traditional pressure switches tend to malfunction when the pressure changes greatly or has instantaneous fluctuations; and Traditional pressure switches have low precision and are difficult to calibrate. Repeated tests are required to determine the set value during calibration. Due to the use of mechanical contacts, the traditional pressure switch generally has a long operating time, and long-term work will also cause the contacts to age, which cannot achieve the ideal switching effect and has a short service life. Co...

AI Technical Summary

Problems solved by technology

Traditional mechanical pressure switches generally have a dead zone of 15% to 30% between the zero point and the full scale set point; traditional pressure switches tend to malfunction when the pressure changes greatly or has instantaneous fluctuations; and The traditional pressure switch has low precision and is difficult to calibrate. Repeated tests are required to determine the set value during calibration.

Due to the use of mechanical contacts, the traditional pressure switch generally has a long operating time. Long-term work will also cause the contacts to age, which cannot achieve the ideal switching effect and has a short service life.

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