Hall type intelligent valve positioner

Abstract

The invention discloses a Hall type intelligent valve positioner. The valve positioner comprises a magnetic steel structural body, a Hall probe, a Hall element and an accessory circuit thereof, a main control circuit, and an integration type piezoelectric valve, wherein the magnetic steel structural body is designed and packaged into a groove shape; the Hall element and the accessory circuit thereof are arranged and sealed in the Hall probe, and an input / output port of the Hall accessory circuit is connected with the main control circuit; the Hall probe is arranged in a center position among magnetic steel structural body grooves, when a valve body moves, the Hall probe outputs an analog voltage signal which forms a specific function relation with motion displacement; and the signal is sent into the main control circuit through the Hall accessory circuit. The valve positioner can overcome the defects that a displacement sensor in the positioner has the defects of great mechanical corrosion and lag, is easy to be influenced by environment shock, is in low precision, is in low structural life and the like, and meanwhile the dynamic and static properties of the intelligent valve positioner are improved.

Description

technical field [0001] The invention relates to the technical field of electronic information and automatic control, in particular to a Hall type intelligent valve positioner. Background technique [0002] Intelligent valve positioner is one of the key accessories of pneumatic actuators, widely used in industrial production, especially in the field of process control engineering. Its working principle is to obtain the current position data of the valve position through real-time sampling of the valve position, compare it with the set value of the valve position opening, and complete the adjustment of the valve position of the pneumatic valve according to the difference and the change of the difference. And control, so that the valve opening is always maintained at the set value. [0003] Through the position feedback circuit, the valve position position data can be fed back and output to the system controller. At the same time, the parameters of the software can be set and...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a Hall-type intelligent valve positioner, which can overcome the shortcomings of the contact displacement sensor in the positioner, such as large mechanical wear, serious mechanical hysteresis, easy to be affected by external vibration, low measurement accuracy, and low structural life. , while improving the dynamic and static performance of the intelligent valve positioner

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