Application of pressure sensor on air compressor
Pressure sensor is the most common sensor in industrial practice. It is widely used in various self-control environments, designing water conservancy and hydropower, railway transportation, construction only, production automation, aerospace, military, petrochemical, oil well, electric power, ship, machine tool. , pipelines and many other industries.
What is the difference between the seal pressure and the gauge pressure in the selection of the pressure sensor: the seal pressure means that the back pressure chamber of the pressure sensor seals a reference pressure of a standard atmospheric pressure, and the back pressure chamber is isolated from the atmospheric pressure, so the seal pressure can be used to maintain the pressure. The sensor's high environmental resistance (eg moisture, atmospheric pressure, etc.). When the gauge pressure is measured, it is affected by changes in atmospheric pressure. However, when measuring the gauge pressure of a higher range (for example, 350 bar), the influence of atmospheric pressure change is negligible, so the sealed pressure product is often used in the place where the high pressure force is measured.
The gauge pressure refers to the pressure sensor back pressure chamber directly through the atmosphere. The biggest advantage is that the gauge pressure is not affected by changes in the external atmospheric pressure, but the environmental resistance is relatively weak. Mainly used in places with small pressure ranges.
Pressure sensor Working principle:
We know that crystals are anisotropic and amorphous are isotropic. Some crystal media, when deformed by mechanical force in a certain direction, have a polarization effect; when the mechanical force is removed, it will return to the uncharged state, that is, when subjected to pressure, These crystals may produce an electricity output effect, which is called the polarization effect. Scientists have developed pressure sensors based on this effect. Piezoelectric materials mainly used in piezoelectric sensors include quartz, sodium potassium tartrate, and dihydrogen phosphate.
The piezoelectric effect is the main working principle of the piezoelectric sensor. The piezoelectric sensor cannot be used for static measurement, because the electric charge after the external force is saved only when the loop has an infinite input impedance. This is not the case, so this determines that the piezoelectric sensor can only measure dynamic stresses. Piezoresistive pressure sensors are commonly used to measure static pressure.
Pressure sensor improves safety of air compressor
Air compressors are compressed air pressure generating devices commonly found in various factories, mines, road construction and construction industries.
How air compressor works
The mechanical energy of the prime mover is converted into gas pressure energy, providing a constant flow of compressed air with a certain pressure.
For example, supplying air to a pneumatic valve provides a source of gas for a process that requires a certain pressure of gas.
The safe operation of air compressors is inseparable from the support of various sensors.
In the air compressor safety management system, the role of the Hedeck pressure sensor is mainly to achieve side airbag control.
In fact, there are two solutions for the control of the airbag side airbags - acceleration sensors and pressure sensors.
In detecting the speed of the side impact, the pressure sensor is nearly three times faster than the acceleration sensor, and the probability of malfunction is smaller.
Micro-sensors are widely used on air compressors because of their low price, small size, ease of integration, and improved system test accuracy.
Then, with the introduction of a miniature intelligent sensor with a dedicated computer, the safety performance of the air compressor will be raised to an unprecedented field.
As the number of air compressors increases, and the pressure sensors used on each air compressor increase.
China's sensor market demand will be larger and larger, industry experts are very optimistic about the prospects of the Chinese sensor market.