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High-precision valve control method

A valve control and control method technology, which is applied in the control system, motor control, position/direction control, etc., can solve the problems of unable to realize motor speed regulation, target valve overshoot, large motor inertia, etc., to achieve flexible adjustment of operating speed, Effect of reducing mechanical shock and low performance requirements

Active Publication Date: 2018-06-29
NANJING SCIYON AUTOMATION GRP
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AI Technical Summary

Problems solved by technology

Neither of these two methods can realize the speed regulation of the motor. In the process of valve control, due to the large inertia of the motor, there are large errors, overshooting of the target valve, and large start-up impact. For those who require high-precision valve control in the production process Occasions that cannot be achieved with traditional actuators

Method used

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Embodiment Construction

[0037] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0038] Such as figure 1 As shown, the high-precision valve control method of the present invention is mainly divided into the following steps:

[0039] Step 1. Use the MCU on the circuit board to read the value of the valve position sensor, then read the saved switch limit value, use the two-point method to calculate the current valve position opening, and convert it into a percentage. It is most direct to use this data format to participate in the calculation .

[0040] Step 2, implement the scanning external command, and calculate the target valve position according to the signal type. Commonly used commands include digital switch commands, analog signals, and bus control signals. After receiving the open signal from the switch signal, the target valve position is converted to 100%. After receiving the switching signal, the target valve position is converted to ...

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Abstract

The invention discloses a high-precision valve control method. The method comprises the following steps of 1, setting system parameters; 2, judging a current valve location value of a valve; 3, according to a target valve location value, calculating a motion stroke at this time; 4, judging the motion stroke at this time; 5, planning a speed curve, wherein according to the motion stroke at this time, the speed curve is planned, and is divided into an acceleration phase, a uniform speed phage and a deceleration phase; 6, controlling the rotational speed according to the speed curve planed in step 5. By means of the high-precision valve control method, the motion control precision of an executor is improved, the running speed can be flexibly adjusted, mechanical shock brought in running is lowered, the material wearing condition of a transmission structure is improved, and the service life of products is prolonged.

Description

technical field [0001] The invention relates to a high-precision valve control method, in particular to a valve control method applied in the industry of electric actuators, which uses a speed curve to control the operation of a motor. Background technique [0002] At present, the motor control of most products in the electric actuator industry basically uses AC contactors and solid-state relay modules. Neither of these two methods can realize the speed regulation of the motor. In the process of valve control, due to the large inertia of the motor, there are large errors, overshooting of the target valve, and large start-up impact. For those who require high-precision valve control in the production process Occasionally, it cannot be realized with traditional actuators. Contents of the invention [0003] The object of the present invention is to solve the defects in the prior art, and provide a valve control method capable of realizing high-precision control of the valve ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05D3/12F16K31/04H02P23/20H02P25/022
CPCF16K31/046G05D3/121H02P2207/05H02P23/20H02P25/024
Inventor 王成杭哲徐艳超
Owner NANJING SCIYON AUTOMATION GRP
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