Pressure transmitter principle is the use of piezoresistive effect, the measured pressure will be converted into an electrical signal output; applications are: industrial automation control, petrochemical, ? Environmental monitoring, medical equipment.
1, principle
Pressure transmitter principle is the use of piezoresistive effect, the measured pressure will be converted into an electrical signal output. Its core part is a pressure-sensitive element, usually using metal thin-film strain gauges or silicon piezoresistive sheet. When the measured pressure acts on the sensitive element, it will produce strain or deformation, resulting in changes in the resistance value. Through the measurement and processing of the resistance value, an electrical signal output proportional to the measured pressure can be obtained.
2, application
Industrial automation control: in industrial automation control system, pressure transmitter is often used to measure the pressure inside the pipeline, container, boiler and other equipment, and will be converted into a standard electrical signal output for PLC, DCS and other controllers. Through the real-time monitoring and control of the pressure signal, it can ensure the stable operation of the equipment and improve the production efficiency and quality.
Petrochemical: In the petrochemical industry, pressure transmitters are widely used in oil and gas pipelines, tanks, reactors and other equipment pressure measurement and control. Through the real-time monitoring and control of pressure signals, the safe operation of equipment can be ensured and accidents can be prevented.
Environmental monitoring: in the field of environmental monitoring, pressure transmitters are commonly used in the atmosphere, water quality and other environmental parameters of the monitoring. Through the real-time monitoring and processing of pressure signals, accurate measurement and control of environmental parameters can be realized to protect the environment and people's health.
Medical equipment: In medical equipment, pressure transmitters are commonly used in blood pressure, respiratory machines, infusion pumps and other equipment for pressure monitoring and control. Through the real-time monitoring and processing of pressure signals, it can ensure the safe operation of medical equipment and improve the quality and efficiency of medical treatment.
Basic introduction of pressure transmitter:
Pressure transmitter is the most commonly used in industrial practice of a sensor, which is widely used in a variety of industrial self-control environment, involving water conservancy and hydropower, railroad transportation, intelligent buildings, production self-control, aerospace, military, petrochemical, oil wells, electric power, ships, machine tools, pipelines and many other The industry.
Pressure transmitter has electric and pneumatic two categories. The unified output signal of the electric type is 0 ~ 10mA, 4 ~ 20mA or 1 ~ 5V and other DC signals. Pneumatic type of unified output signal for 20 ~ 100Pa gas pressure.
Pressure transmitters can be divided into different conversion principles of force (torque) balance, capacitive, inductive, strain and frequency, etc., the following briefly introduces the principle of several pressure (differential pressure) transmitter, structure, use, maintenance and calibration and other knowledge.