A pulse detection method and device based on valve body opening driven by a stepping motor

Abstract

The invention relates to a pulse detection method based on the valve body opening driven by a stepping motor, including S1, determining and inputting the type of the stepping motor and the forward running direction of the valve body; S2, detecting whether there is a pulse signal input, if Yes, execute S3; otherwise, execute S5; S3, judge whether the direction of the pulse signal is the positive direction, if yes, execute S4, otherwise, the step count of the stepping motor will be displayed, and then execute S6; S4, check whether Satisfy the clearing condition, if yes, display the current step count of the stepping motor and then clear it, then increment the step count of the stepping motor and display, and return to S2; if not, increment the step count of the stepping motor and display , and return to S2; S5, judge whether the predetermined time is reached, if yes, the process ends; if not, return to S2; S6, check whether the clearing condition is satisfied, if yes, display the current step count of the stepping motor and then clear it , and then return to S2; if not, directly return to S2.

Description

technical field [0001] The invention relates to a method and a device for detecting the opening of a valve body, in particular to a method and system for detecting pulses of the opening of a valve body driven by a stepping motor. Background technique [0002] In household appliances, valve bodies driven by stepping motors such as electronic expansion valves and warm water valves are widely used. During the functional test of household appliances, it is necessary to detect the opening of the valve body. The traditional method is detected by mechanical devices such as pointer indication, which has the following shortcomings: [0003] (1) Since the opening value is indicated by means of pointer indication, etc., it is impossible to accurately read the number of action steps, and minor adjustments may not be observed; [0004] (2) Sometimes the interval between valve body actions is relatively long, and since there is no prompt, it is necessary to stare at the detection device...

AI Technical Summary

Problems solved by technology

[0003] (1) Since the opening value is indicated by means of pointer indication, etc., it is impossible to accurately read the number of action steps, and minor adjustments may not be observed;

[0004] (2) Sometimes the interval between valve body actions is relatively long, and since there is no prompt, it is necessary to stare at the detection device for a long time during the test;

[0005] (3) When the valve body is closed, the automatic zeroing action cannot be performed

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