Pressure Sensor

A pressure transducer (Pressure Transducer) is a device or device that can sense a pressure signal and convert the pressure signal into a usable output electrical signal according to a certain rule.

Pressure sensors are usually composed of pressure sensitive components and signal processing units. According to different test pressure types, pressure sensors can be divided into gauge pressure sensors, differential pressure sensors and absolute pressure sensors.

Pressure sensor is the most commonly used sensor in industrial practice. It is widely used in various industrial self-control environments, involving water conservancy and hydropower, railway transportation, intelligent building, production automation, aerospace, military, petrochemical, oil well, electric power, ship, machine tool. Pipes and many other industries, the following briefly introduces some common sensor principles and their applications. There is also a medical pressure sensor.

Pressure sensor is one of the most widely used sensors. The traditional pressure sensor is based on the mechanical structure of the device, and the deformation of the elastic element indicates the pressure, but this structure is large in size and heavy in mass, and can not provide electrical output. With the development of semiconductor technology, semiconductor pressure sensors have also emerged. It is characterized by small size, light weight, high accuracy and good temperature characteristics. Especially with the development of MEMS technology, semiconductor sensors are developing towards miniaturization, and their power consumption is low and reliability is high.

There are many kinds of mechanical sensors, such as resistance strain gauge pressure sensor, semiconductor strain gauge pressure sensor, piezoresistive pressure sensor, inductive pressure sensor, capacitive pressure sensor, resonant pressure sensor and capacitive acceleration sensor. But the most widely used is the piezoresistive pressure sensor, which has a very low price, high accuracy and better linear characteristics.

Application fields

Hydraulic system

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. In typical walking machinery and industrial hydraulics, any pressure sensor will soon be destroyed if it is not designed with such extreme conditions in mind. Need to use the impact resistance of the pressure sensor, the pressure sensor to achieve the impact of the main two methods, one is to change the strain chip, the other is the external coil, generally in the hydraulic system to use the first method, mainly because the installation is convenient. In addition, another reason is that the pressure sensor also has to withstand the continuous pressure pulsation from the hydraulic pump.

Monitoring mine pressure

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; 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. 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. These sensors have a wide range of applications in the mining industry, and the specific sensor to be used is selected according to the specific mining environment.

Safety control system

Pressure sensors are often used in safety control systems, mainly in the field of air compressor's own safety management system. 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.

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