Track valve position measuring system and method based on Kalman filter

Abstract

The invention discloses a track valve position measuring system and method based on a Kalman filter. The system comprises a gyroscope and a Hall sensor which are both arranged on a track valve; the system further comprises a controller, wherein the controller is connected with the gyroscope and the Hall sensor through a data collector; the data collector acquires measurement data of the gyroscopeand the Hall sensor, and the controller constructs the Kalman filter and controls the data collector to perform measurement updating on the measurement data of the gyroscope so as to obtain an updatedone-step prediction first state vector and an updated one-step prediction system covariance; a gain matrix of the updated Kalman filter is obtained according to the prediction system covariance; anda current first state vector and a current system covariance are updated according to the gain matrix. According to the track valve position measuring system and method based on the Kalman filter, thedata of the Hall sensor and the gyroscope are fused, so that the problem of poor measurement precision through using a single sensor can be solved.

Description

technical field [0001] The present application relates to valve position detection technology in the field of valves, in particular to a Kalman filter-based orbital valve position measurement system and method. Background technique [0002] As a ball valve with single seat and two-way sealing, orbit valve combines the advantages of gate valve, ball valve, globe valve and plug valve, and is widely used in gas pipelines. Orbit valves are usually configured with feedback valve position feedback. The feedback device cooperates with the on-site PLC (programmable logic circuit) system to realize the remote feedback of the valve switch state, and provides the corresponding valve position signal output for the monitoring system that manages the valve. However, limited by the structure of the existing orbital valve, the integrated feedback device is mainly used for on-site operators to observe, and the sampling accuracy directly combined with the PLC system is limited, and the cable...

AI Technical Summary

Problems solved by technology

However, during the rotation of the valve, it is difficult to avoid vibration interference perpendicular to the rotation plane, resulting in counting errors of the Hall sensor

Gyroscopes have various errors such as temperature drift, time drift, and random interference, making it difficult to be used in rotation measurement systems alone

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