Instrument valve control method and instrument valve control device

Abstract

The present invention relates to an instrument valve control method and an instrument valve control device. The method comprises: continuously monitoring the work state of an instrument communication serial port, and extracting and outputting the serial port communication data; when receiving the serial port communication data, outputting control signals to hang up a motor and store the current motor state data; continuously detecting whether a setting time receives the serial port communication data or not, and determining whether the serial port communication data is read or not according to the detection result; reading the serial port communication data, and determining to recover the motor state or start the motor according to the reading result; continuously monitoring the valve in-place state, and outputting the valve in-place state signals; and receiving valve in-place state signals, and continuously holding the state of converting the state according to the received signal control motor. The instrument valve control device comprises corresponding modules realizing the functions mentioned above. The instrument valve control method and the instrument valve control device can realize stable, efficient and accurate valve control functions.

Description

technical field [0001] The invention relates to the field of automatic control. More specifically, the present invention relates to an instrument valve control method and an instrument valve control device. Background technique [0002] In valve-controlled instruments, the valve is usually controlled by a motor. Photoelectric direct reading water meters generally use small DC motors to drive the opening and closing of their valves. The water meter MCU controls the rotation of the DC motor (forward and reverse directions) and stops by generating different control signals to achieve the purpose of operating the valve. [0003] In the process of valve control, the MCU must timely and accurately identify whether the valve action is in place, not only to ensure that the valve can be opened and closed correctly, but also to prevent the motor from continuing to operate after the valve action is in place, resulting in waste of electric energy, or even burning the motor and control...

AI Technical Summary

Problems solved by technology

This method cannot detect the valve state in real time, so when the motor is in place and the action time is uncertain, such as the size of the water flow through the valve changes, the valve has rust, and the electrical characteristics of the motor circuit change, the normal opening and closing of the valve will not be completed.

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