A Digital Controller of Proportional Valve

Abstract

The invention provides a digital controller of a proportional valve. The digital controller of the proportional valve comprises a monitoring configuration module, an ARM (Advanced RISC Machine) processor, a signal collection module, a digital signal processor and a digital driver, wherein the monitoring configuration module is used for collecting configuration information about the work of the digital signal processor and sending the configuration information to the ARM processor through a data bus; the ARM processor is used for configuring the control mode and control parameter of the digital signal processor according to the configuration information; the signal collection module is used for collecting the analog signal of the proportional valve, converting the analog signal into a digital instruction signal and sending the digital instruction signal to the digital signal processor; the digital signal processor is used for calculating the duty ratio value of a pulse width modulated signal according to the received digital signal and sending the duty ratio value of the pulse width modulated signal to the digital driver; the digital driver is used for outputting the pulse width modulated signals of various duty ratios according to the received duty ratio value of the pulse width modulated signal so as to drive the proportional valve.

Description

technical field [0001] The invention relates to the technical field of hydraulic proportional control, in particular to a digital controller of a proportional valve. Background technique [0002] The proportional controller is the core control element of the proportional control system, and its performance directly affects the overall performance of the proportional valve. At present, my country's electro-hydraulic proportional controllers have few functions, low performance, short service life, poor environmental adaptability, low reliability, etc., and cannot compete with foreign products. [0003] At present, most of the proportional controllers in China are implemented by analog circuits composed of op amps and discrete components. There is no digital processor, and the hardware circuits are relatively complicated. They are greatly affected by environmental factors and have poor reliability. Moreover, the parameter setting is completed by the potentiometer, which has po...

AI Technical Summary

Problems solved by technology

At present, my country's electro-hydraulic proportional controllers have few functions, low performance, short service life, poor environmental adaptability, low reliability, etc., and cannot compete with foreign products.

[0003] At present, most of the proportional controllers in China are implemented by analog circuits composed of op amps and discrete components. There is no digital processor, and the hardware circuits are relatively complicated. They are greatly affected by environmental factors and have poor reliability.

And the parameter setting is done by the potentiometer, the repeatability and replicability are very poor, once it is changed, it will be difficult to restore, and the wear of the potentiometer has serious hidden dangers to the reliability of the proportional controller

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