Digital air pressure sensor

Abstract

The invention discloses a digital air pressure sensor. The digital air pressure sensor comprises a shell and a digital display screen arranged on the shell. A sensor body is arranged in the shell, andthe sensor body comprises a terminal button, a mounting piece, a buffer assembly, a sensitive element assembly and a connector. An axial ventilation pipe I is arranged on the connector, an air pressure sensing assembly is arranged in the ventilation pipe I, the air pressure sensing assembly comprises a concave deformation film and a retainer, the concave deformation film is arranged on the retainer, and a resistance strain gauge is arranged in the concave deformation film. An air inlet pipe is arranged at the upper end of the ventilation pipe I. A movable cavity is formed in the mounting piece, the sensitive element assembly is movably arranged in the movable cavity, and an annular clamping plate is arranged at the upper end of the sensitive element assembly in the movable cavity. According to the invention, the sensitive element assembly can be buffered when the air pressure is large, and the air inlet pipe can be blocked when the air pressure exceeds the measurement range, thereby preventing the sensor from being damaged.

Description

technical field [0001] The invention relates to the technical field of sensors, in particular to a digital air pressure sensor. Background technique [0002] The air pressure sensor is widely used as a traditional device for monitoring gas pressure. The air pressure monitored by the air pressure sensor is large or small. When a large air pressure enters the sensor, it will cause a large instantaneous pressure on the sensitive element assembly inside the sensor. The impact will cause damage to the sensitive component assembly in the long run; moreover, the sensor has a range for measuring air pressure, and when the air pressure entering the sensor exceeds this range, the sensor may be directly damaged. Contents of the invention [0003] The problem to be solved by the present invention is to provide a digital air pressure sensor, which can buffer the sensitive element assembly when the air pressure is high, and can block the intake pipe when the air pressure exceeds the mea...

AI Technical Summary

Problems solved by technology

[0002] The air pressure sensor is widely used as a traditional device for monitoring gas pressure. The air pressure monitored by the air pressure sensor is large or small. When a large air pressure enters the sensor, it will cause a large instantaneous pressure on the sensitive element assembly inside the sensor. The impact will cause damage to the sensitive element assembly in the long run; moreover, the sensor has a range for measuring the air pressure, and when the air pressure entering the sensor exceeds this range, the sensor may be directly damaged

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