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Development history and trends of pressure transmitters
Time：
2024-08-12
At present, pressure transmitters include many industries such as water conservancy and hydropower, military industry, petrochemicals, oil wells, electricity, railway transportation, intelligent buildings, production automation control, aerospace, ships, machine tools, pipelines, etc; Widely used in various industrial automatic control environments. Now, let's learn about the development history and trends of pressure transmitters with the editor.
The development of pressure transmitters has generally gone through four stages:
(1) Early pressure transmitters, such as mercury float differential pressure gauges and membrane type differential pressure transmitters, used a large displacement working principle. These transmitters had low accuracy and large volume.
(2) There is a force balance differential pressure transmitter with slightly higher accuracy, which appeared in the 1950s, but its structure is complex, with poor reliability, stability, and vibration resistance, and small feedback force.
(3) With the emergence of new processes, materials, and technologies, especially the rapid development of electronic technology in the mid-1970s. A displacement transmitter with simple structure and small volume has emerged.
(4) With the rapid development of science and technology, the measurement accuracy of transmitters was improved in the 1990s and gradually developed towards intelligence. Digital signal transmission is more conducive to data acquisition. There are different types of diffused silicon piezoresistive transmitters, capacitive transmitters, differential inductive transmitters, and ceramic capacitive transmitters.
The development trend of pressure transmitters:
The research field of pressure transmitters is very common in various countries around the world today, almost penetrating into various industries. However, it can be summarized as follows:
1. Intelligence: With the emergence of integration, transmitters can have functions such as automatic compensation, communication, self diagnosis, and logic judgment, and some microprocessors can be added to integrated circuits.
2. Integration: Pressure transmitters are increasingly integrated with other measurement transmitters to form measurement and control systems. This integrated system can improve the operational speed and efficiency of process control and factory automation.
3. Miniaturization: The demand for small pressure transmitters in the market is constantly increasing. These small transmitters can operate in extremely harsh environments, require almost no maintenance, and have minimal impact on the surrounding environment. They can be placed in various important areas to collect data without affecting people's normal lives.
4. Standardization: The design and manufacturing of transmitters have established certain industry standards.
5. Overview: Another development trend of pressure transmitters, such as automotive components, medical instruments, and energy and environmental control systems, is to expand from the mechanical industry to other fields.
A pressure transmitter can convert physical pressure parameters such as liquids and gases sensed by pressure sensors into standard electrical signals (such as 4-20m, 0-5V, etc.). A device that can convert pressure into pneumatic or electrical signals for control and remote transmission. Provide measurement, indication, and process adjustment for secondary instruments such as indicator recorders, regulators, and alarm instruments.
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