Pressure sensors are one of the most commonly used sensors in industrial practice. They are widely used in various industrial automation environments, including water conservancy and hydropower, railway transportation, intelligent buildings, production automation, aerospace, military, petrochemical, oil wells, power, shipbuilding, machine tools, pipelines and many other industries.
What are the different types of pressure sensors?
The fundamental principle of multi-sensor information fusion technology is similar to the human brain's comprehensive information processing. It involves multi-level and multi-spatial information complementarity and optimized combination from various sensors to ultimately produce a consistent interpretation of the observed environment. This process requires the full and rational allocation and use of multi-source data. The ultimate goal of information fusion is to derive more useful information from the separate observation information obtained by each sensor through multi-level and multi-faceted combination of information. This not only leverages the advantages of multiple sensors working together but also comprehensively processes data from other information sources to enhance the intelligence of the entire sensor system.
1. Diffused silicon pressure transmitter
Diffused silicon pressure transmitters are made by encapsulating an isolated silicon piezoresistive pressure sensing element in a stainless steel housing. They convert the sensed liquid or gas pressure into a standard electrical signal for output. The DATA-52 series diffused silicon pressure transmitters are widely used in field measurement and control of industrial processes such as water supply/drainage, heating, petroleum, chemical, and metallurgy.
2. Semiconductor Piezoresistive Type
A semiconductor piezoresistive diffusion pressure sensor is created by forming a semiconductor deformation pressure on the surface of a thin film. External force (pressure) deforms the thin film, generating a piezoresistive effect, thereby converting the change in impedance into an electrical signal.
3. Capacitive type
Capacitive pressure sensors form a capacitor by placing a fixed glass electrode and a movable silicon electrode together. The change in capacitance caused by deformation of the movable electrode due to external force (pressure) is converted into an electrical signal. (The E8Y operates on the capacitive principle, while other models use a semiconductor method).
Pressure sensors are among the most widely used types of sensors. Traditional pressure sensors are primarily mechanical devices that indicate pressure through the deformation of elastic elements. However, this type of structure is large, heavy, and cannot provide electrical output. With the development of semiconductor technology, semiconductor pressure sensors have emerged. Their characteristics include small size, light weight, high accuracy, and good temperature characteristics. Especially with the development of MEMS technology, semiconductor sensors are becoming increasingly miniaturized, and their power consumption and reliability are also improving.
