A Hall-type quarter-stroke valve position transmitter

Abstract

The invention discloses a Hall type rotary-motion valve position transmitter. The technical scheme includes that a Hall type displacement sensor is fixed to a rotary shaft of a pneumatic actuating mechanism or a valve stem of a valve, and is used for converting displacement of the valve stem into an electric signal and transmitting the position signal to a main circuit during movement of the valve stem of the valve; and the main circuit is used for receiving the position signal transmitted by the Hall type displacement sensor and sampling and processing information processing of the position signal, so that position data of the valve position of the valve are measured. According to the technical scheme, on the one hand, shortcomings of high mechanical abrasion, lagging, easiness in being affected by external vibration, sort service life of a structure, and the like of a displacement sensor of an existing rotary-motion valve position transmitter can be overcome, on the other hand, dynamic and static properties of a valve positioning device of the rotary-motion valve position transmitter can be improved, and high-precision feedback transmission of the data of the valve position can be realized.

Description

technical field [0001] The invention relates to the fields of electronic technology, sensor technology and automatic control technology, and more specifically, relates to a Hall-type angular stroke valve position transmitter. Background technique [0002] The quarter-turn valve position transmitter is one of the important accessories of the valve, which is widely used in industrial production, especially in the field of process control engineering. The working principle of the angular stroke valve position transmitter is mainly: to sample the valve position in real time to obtain the current position data of the valve position; through the valve position feedback circuit, the obtained valve position position data is fed back and output to the system controller. [0003] At present, in the valve position detection devices of quarter-stroke valve position transmitters, electric valve positioners or valve transmitters in the prior art, the "feedback link + gear set + rotary pot...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a Hall-type quarter-turn valve position transmitter, which can not only overcome the large mechanical wear, serious mechanical hysteresis, susceptibility to external vibration, low measurement accuracy, and structural life of existing contact displacement sensors. Low disadvantages, but also can improve the dynamic and static performance of angular stroke valve position transmitters and valve positioners, and can realize high-precision feedback transmission of valve position data

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