Guide: The air pressure sensor is a kind of device that detects the gas pressure. How does the air pressure sensor realize this function? What is the principle of the air pressure sensor ? Come and look at it~
First, the principle of air pressure sensor - - Introduction
The sensor, the national standard GB7665-87, is defined as a device or device consisting of a sensitive component and a conversion component that can be sensed and converted into a usable signal according to a certain rule. The air pressure sensor is used to sense the gas pressure and output it in other forms. It is mainly used to complete the detection of the absolute pressure of the gas, and is generally used in various experiments related to gas pressure.
Second, the principle of air pressure sensor
The air pressure sensor of the air compressor mainly uses a film, a thimble and a flexible resistor to perform the function of detecting and converting the air pressure. The film is extremely sensitive to the change of the pressure of the air pressure. Once the change of the air pressure is sensed, it will deform and drive the thimble. This series of actions will change the resistance value of the flexible resistor, and convert the change of the air pressure into the change of the resistance value. The form of the signal is presented, and then the electrical signal is processed accordingly and output to the computer for presentation.
Other air pressure sensors use a variable-capacity silicon capsule to perform air pressure detection. When the air pressure changes, the deformation of the variable-capacity silicon capsule is induced and the capacitance of the parallel-plate capacitor in the silicon capsule is changed, so that the pressure change is output as an electrical signal, and after being processed, it is transmitted to the computer for display.
Third, the principle of air pressure sensor - - application
The air pressure sensor is used to measure the gas pressure. On the surface, we don't care what the pressure is. It seems to be useless, but the fact is not purple. For good climbers, the air pressure can be measured according to the pressure sensor in the mobile phone to calculate the current altitude; the air pressure sensor can also be used to assist navigation and reduce the mistakes when navigating on the viaduct; in the absence of signal zone, Accurate positioning can be achieved according to the air pressure sensor and the accelerometer and gyroscope. Do you still think that the air pressure sensor is useless?
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