What are the classifications of oil pressure sensors?

Oil pressure sensor-Semiconductor piezoresistive sensors use the piezoresistive effect of semiconductors. The deformation of ordinary semiconductor materials is better than the strain sensitivity coefficient of metal materials. Using the piezoresistive effect of monocrystalline silicon, on the basis of monocrystalline silicon, the components made by semiconductor technology, when the semiconductor is under pressure, the resistance will change, and the signal output of the pressure change will be formed. Commonly used piezoresistive sensors form a bridge from four equivalent deformation elements. If the pressure effect changes, it is divided into two pairs to produce a change effect. As one pair becomes larger and one pair becomes smaller, the bridge becomes unbalanced and a voltage signal proportional to the pressure is input. The larger features are high sensitivity, wide measurement range, strong output signal, and easy integration. However, the resistance to oil pollution and particulate effects is weak. To obtain the correct effect, media must be used for isolation.

Oil pressure sensorThe traditional elastic deformation sensor has a wide measurement range, high precision, good stability, long life, and can withstand the effects of high temperature, high speed, high pressure, and vibration, so it is more suitable for automobile detection environment. The strain sensor is generally composed of four bridge resistors. The opposite bridge arm resistor group causes the tension change by the pressure, and the other produces the pressure change that affects the pressure. The signal size is the same, and the sign is opposite, which improves the sensitivity of the sensor. The output signal amplitude of the sensor changes very little, and the temperature environment changes greatly, temperature compensation is needed, but it is very difficult.

Oil pressure sensorThick film pressure sensor is a new force sensor. Its utilization is made of the piezoresistive effect of thick film resistors, and its strain resistors are thick film acid resistors with piezoresistive effect, which are directly printed and sintered on ceramic elastomers using thick film process technology. After high temperature baking, the strain resistor and ceramic are firmly combined without pasting. Due to the commonly used stress force sensor, this form avoids the disadvantages of aging in the paste process. The thick film has stable deformation resistance, high temperature resistance, and the temperature coefficient is more than an order of magnitude smaller than that of diffused silicon.

Oil pressure sensorCeramic piezoresistive sensors use dry ceramic pressure sensors made of ceramic materials through special processes. Ceramic is a good material with good elasticity, good corrosion, good wear and high vibration. The thermal stability of the ceramic is obviously better than the working range of the thick film resistance sensor, the temperature range can reach -40~125, and it still has high accuracy and stability at high temperature. Electrical insulation strength

2kV, strong output signal, with long-term stability. The working principle is: the measuring pressure directly acts on the surface of the ceramic diaphragm, causing the ceramic diaphragm to deform. The thick film resistor is printed on the back of the ceramic diaphragm to form a bridge. Under the action of the varistor, the bridge generates a proportional electrical signal related to pressure and voltage. At the same time, the signal is distinguished according to the difference in pressure range and is compatible with inductive sensors. Through laser measurement, the sensor has temperature stability and time stability, and the sensor contains temperature compensation, which can contact most of the media to ensure the detection effect. However, the cost is high and publicity requires more time.

Jiangmen Hengmin Intelligent Control Instrument Co., Ltd. is a pressure transmitter manufacturer, mainly engaged in oil pressure sensors, wall-mounted boiler water pressure sensors, urea pump pressure sensors, hydrogen pressure sensors, pressure calibrators, automobile pressure sensors, water pump pressure sensors, water pressure Sensors, intelligent pressure controllers, high pressure sensors and other products. Our company found in the research industry production activities that with the increasing popularity of the Internet of Things and intelligent manufacturing concepts, the demand for pressure sensors in my country has grown rapidly in recent years. In response to the needs of the era of intelligent manufacturing, our company has developed high-precision testing instruments and special production system equipment for pressure sensor manufacturers to help sensor manufacturers greatly reduce the labor intensity of testing, reduce the number of workers, improve product quality, improve production efficiency and reduce production costs.