Views: 85 Author: Site Editor Publish Time: 2020-03-03 Origin: Site
A pressure sensor is a device or fitting that can sense a pressure signal and convert the pressure signal into a usable output electrical signal according to a certain rule. The pressure sensor applied in car is called TPMS (tire pressure monitoring system)
A pressure sensor usually consists of a pressure-sensitive element and a signal processing unit. According to different test pressure types, pressure sensors can be divided into gauge pressure sensors, differential pressure sensors and absolute pressure sensors.
Pressure transducer is the most commonly used sensor in industrial practice. It is widely used in various industrial automatic control environments, including water conservancy and hydropower, railway transportation, intelligent buildings, production automatic control, aerospace, military, petrochemical, oil wells, electricity, ships, machine tools , pipelines and many other industries.
The output of a common pressure sensor is generally an analog signal. An analog signal refers to a continuous signal with information parameters within a given range. Or within a continuous time interval, the characteristic quantity of the information can be presented as a signal of any value at any instant. The pressure transducer we usually use is mainly manufactured by using the piezoelectric effect. Such a sensor is also called a piezoelectric sensor. The following briefly introduces some common sensor principles and their applications. Another is medical pressure sensor.
Heavy-duty pressure sensors are also a type of sensor, but we rarely hear about this type of pressure sensor. It is commonly used in transportation applications by monitoring pneumatic, light-load hydraulic pressure, brake pressure, oil pressure, transmission, and The pressure, hydraulic force, flow rate and liquid level of key systems such as truck / trailer airlocks to maintain the performance of heavy-duty equipment. Heavy-duty pressure sensors have been developed. In order to be able to be used for more complex control systems, design engineers must improve sensor accuracy and reduce costs to facilitate practical applications.
The basic principle of multi-sensor information fusion technology is similar to the process of comprehensive processing of information by the human brain. It performs various layers of multi-level and multi-space information complementation and optimized combination processing, and finally produces a consistent interpretation of the observation environment. In this process, we must make full use of multi-source data for reasonable control and use. The ultimate goal of information fusion is to derive more useful information by combining multiple levels and aspects of information based on the separated observation information obtained by each sensor. This is not only to take advantage of the cooperative operation of multiple sensors, but also to comprehensively process data from other information sources to improve the intelligence of the entire sensor system.
Pressure sensors are the most widely used type of sensor. The traditional pressure transducers are mainly mechanical structure type devices, and the deformation of the elastic element is used to indicate the pressure. However, this structure has large size and heavy weight, and cannot provide electrical output. With the development of semiconductor technology, semiconductor pressure sensors have also emerged. Its characteristics are 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 small and reliability is high.
Diffused silicon pressure transmitters are made by packaging isolated silicon piezoresistive pressure-sensitive elements in a stainless steel housing. It can convert the felt liquid or gas pressure into a standard electric signal for external output. The DATA-52 series diffused silicon pressure transmitter is widely used in field measurement and control of industrial processes such as water supply / drainage, heat, petroleum, chemical, metallurgy and so on.
The semiconductor piezoelectric impedance diffusion pressure sensor forms a semiconductor deformation pressure on the surface of the sheet, and deforms the sheet by external force (pressure) to produce a piezoelectric impedance effect, so that the change in impedance is converted into an electrical signal.
The electrostatic capacity type pressure sensor is a capacitor that opposes the fixed pole of glass and the movable pole of silicon to form a capacitance, and converts the change in electrostatic capacity generated by the deformation of the movable pole by external force (pressure) into an electrical signal. (The operating principle of E8Y is the capacitance method, and other models use the semiconductor method).
1. Standard thread pressure measurement method.
2. All stainless steel structure, protection grade IP68.
3. Measurement accuracy is up to 0.1 level.
4. RS485, 4 ~ 20mA output are optional.
5. Polyurethane professional cable, high temperature resistance and corrosion resistance.
