The inlet pipe is mainly responsible for the entry of air. When the air enters the interior of the sensor, it will exert pressure on the vacuum tube, and the pressure will increase with the continuous increase of the amount of air entering, and the other side of the vacuum tube is installed with a pressure-sensitive resistor. A varistor is a rheostat that can constantly change its resistance based on the amount of pressure. The change in the size of the resistance can affect the size of the current in the circuit, so as to send different electrical signals and produce different control effects on the circuit. This is how air pressure sensors work.
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What are the applications of air pressure sensors?
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1. Applied to hydraulic system
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Pressure sensor in the hydraulic system is mainly to complete the closed loop control of force. When the control spool moves suddenly, a peak pressure several times the working pressure of the system will be formed in a very short time.
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2. Applied to safety control system
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Pressure sensors are often used in safety control systems, mainly in the field of air compressor's own safety management system.
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There are many sensor applications in the field of safety control, and it is not surprising that pressure sensors, as a very common sensor, are used in safety control systems. In the field of safety control, the application is generally considered from the performance aspect, from the consideration of price, and from the safety and convenience of actual operation, and it has been proved that the effect of selecting pressure sensors is very good.
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The pressure sensor uses the machining technology of mechanical equipment to install some components and signal regulators and other devices on a small chip.
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So the small size is also one of its advantages, in addition, the cheap price is also another big advantage. To some extent, it can improve the accuracy of system testing.
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In the safety control system, the pressure brought by the compressor is controlled to a certain extent by installing a pressure sensor in the pipeline equipment of the air outlet, which is a certain protective measure and a very effective control system.
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When the compressor starts normally, if the pressure value does not reach the upper limit, then the controller will open the air intake to adjust the equipment to reach the maximum power.
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3. Applied to injection molds
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Pressure sensor plays an important role in injection mold. The pressure sensor can be installed in the nozzle of the injection molding machine, the hot runner system, the cold runner system and the mold cavity, and it can measure the plastic pressure somewhere between the nozzle of the injection molding machine and the mold cavity during the injection, filling, pressure holding and cooling process.
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4. Used to monitor mine pressure
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Sensor technology is one of the key technologies of mine pressure monitoring. On the one hand, we should correctly apply the existing sensors to serve the mining industry;
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On the other hand, as a sensor manufacturer, it is necessary to develop and develop new pressure sensors to adapt to more mining industry applications.
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There are many kinds of pressure sensors, and based on the special environment of mine pressure monitoring, mine pressure sensors mainly include: vibrating string pressure sensor, semiconductor piezoresistive pressure sensor, metal strain gauge pressure sensor, differential transformer pressure sensor and so on.