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Pulse width modulation based pneumatic proportion pressure regulating valve

A pneumatic proportional and pulse width modulation technology, applied in the direction of fluid pressure actuators, servo motor components, mechanical equipment, etc., can solve the problems of high price and achieve the effects of stable output pressure, good control performance and practicability

Inactive Publication Date: 2018-06-05
杨晶
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

its expensive

Method used

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  • Pulse width modulation based pneumatic proportion pressure regulating valve
  • Pulse width modulation based pneumatic proportion pressure regulating valve
  • Pulse width modulation based pneumatic proportion pressure regulating valve

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Embodiment Construction

[0016] The present invention will be further described below in conjunction with accompanying drawing and embodiment.

[0017] like figure 1 , The pneumatic proportional pressure regulating valve consists of a pilot pressure regulating valve, a two-position three-way high-speed switching valve, a pneumatic pressure sensor (MPX5700 from MOTOROLA), a control circuit, an LCD (SMS0424) display and a power supply module.

[0018] The hardware control circuit of the system is based on Silicon Laboratories' C8051 F020 microcontroller, including pressure sensor signal amplification, serial communication, keyboard control, high-speed switch valve drive, program download, and three-terminal voltage regulator.

[0019] like figure 2 After the system is powered on, enter the pressure value through the keyboard to start the system. When the system detects that the outlet pressure value of the pressure regulating valve is lower than the set pressure value, the intake solenoid valve opens...

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Abstract

The invention discloses a pulse width modulation based pneumatic proportion pressure regulating valve. A closed-loop control system is composed of a pilot pressure regulating valve, high-speed switching valves, a pressure sensor, a control circuit with a single-chip microcomputer as a core and a display circuit, the system outputs a pulse width modulation (PWM) signal through software programmingto control the two pneumatic high-speed switching valves, and the pressure of a pilot cavity of the pneumatic pressure regulating valve is controlled so as to achieve the aim of carrying out proportion control over the pressure of an outlet of the pressure regulating valve. According to the pneumatic proportion pressure regulating valve, continuous and adjustable pressure can be generated, stability of output pressure can be guaranteed, and good control performance and practicality are achieved.

Description

technical field [0001] The invention relates to a pneumatic proportional pressure regulating valve based on pulse width modulation, which is suitable for the mechanical field. Background technique [0002] With the rapid development of microelectronics technology and the wide application of computer technology, electromechanical hydraulic or electromechanical integration and the application of digital computers to control hydraulic or pneumatic systems are an important trend in the development of fluid transmission and control technology. [0003] Pneumatic proportional pressure regulating valve has small size, high control precision, low requirements on gas source, output pressure, flow rate, etc. can not be affected by load changes, has the performance of pressure compensation, and can be continuously and proportionally adjusted according to a given input signal. Control the pressure and flow of the air flow, so as to realize the continuously adjustable high-precision cont...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F15B13/02
CPCF15B13/02
Inventor 杨晶
Owner 杨晶
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