CN108119427A - A kind of pneumatic proportional pressure regulator valve based on pulsewidth modulation - Google Patents
A kind of pneumatic proportional pressure regulator valve based on pulsewidth modulation Download PDFInfo
- Publication number
- CN108119427A CN108119427A CN201611072877.7A CN201611072877A CN108119427A CN 108119427 A CN108119427 A CN 108119427A CN 201611072877 A CN201611072877 A CN 201611072877A CN 108119427 A CN108119427 A CN 108119427A
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- Prior art keywords
- pressure regulator
- regulator valve
- pneumatic
- program
- control
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Fluid Pressure (AREA)
Abstract
A kind of pneumatic proportional pressure regulator valve based on pulsewidth modulation, by pilot-operated type pressure regulator valve, high-speed switch valve, pressure sensor, the closed-loop control system formed using microcontroller as the control circuit of core and display circuit, system modulates (PWM) signal to control two Pneumatic high-speed switch valves by software programming output pulse width, air vent valve guide's cavity pressure is controlled, to realize the purpose that ratio control is carried out to pressure regulator valve outlet pressure.The pneumatic proportional pressure regulator valve can generate continuously adjustable pressure and ensure the stabilization of output pressure, have good control performance and practicability.
Description
Technical field
The present invention relates to a kind of pneumatic proportional pressure regulator valve based on pulsewidth modulation, suitable for machinery field.
Background technology
With the fast development of microelectric technique and the extensive use of computer technology, mechanical electronic hydraulic or electromechanical gas integral and
The important trend that control is Fluid-transmission and control technology development is carried out to hydraulic pressure or pneumatic system using digital computer.
Pneumatic proportional pressure regulator valve has small, control accuracy height, and low to source of the gas requirement, output pressure, flow etc. can not
By load variation influenced, have pressure compensated performance, can by given input signal continuously, control air-flow pari passu
Pressure, flow etc., so as to fulfill the continuously adjustable high-precision control of the position of executive component, speed and power, realize pressure
Multistage and stepless variation, meet automation equipment flexible production requirement.With electronic technology, computer technology, control
The fast development of the modern industrial technologies such as technology, application field constantly expand.
At present, domestic high speed pneumatic proportional dump valve is also in the laboratory research stage, and there are no production pneumatic proportionals
The producer of valve is more not carried out seriation, the variation of product.Practical application is mainly from external import.Main production in the world
There are FESTO, BURKERT of Germany, Japanese SMC etc. in the company of pneumatic proportional valve.Its is expensive.Therefore developing has
The pneumatic proportional valve of China's characteristic has good market prospects.
The content of the invention
The present invention proposes a kind of pneumatic proportional pressure regulator valve based on pulsewidth modulation, by pilot-operated type pressure regulator valve, high-speed switch
Valve, pressure sensor, the closed-loop control system formed using 08051020 microcontroller as the control circuit of core and display circuit are
System modulates (PWM) signal to control two Pneumatic high-speed switch valves, to air vent valve guide by software programming output pulse width
Cavity pressure is controlled, to realize the purpose that ratio control is carried out to pressure regulator valve outlet pressure.
The technical solution adopted in the present invention is：
The pneumatic proportional pressure regulator valve by pilot-operated type pressure regulator valve, two-bit triplet high-speed switch valve, pneumatic pressure transmitter (
The MPX5700 of MOTOROLA companies), control circuit, LCD (SMS0424) display and power module composition.
The hardware control circuit of the pneumatic proportional pressure regulator valve is with Silicon Laboratories companies
C8051F020 microcontrollers are core, are driven including pressure sensor signal amplification, serial communication, Keyboard Control, high-speed switch valve
The modules such as dynamic, program download and three-terminal voltage-stabilizing.
The software control of the pneumatic proportional pressure regulator valve is using modularized design, by system initialization routine, keyboard pipe
Manage program, LCD shows program, data acquisition process program, PID control program, PWM control program, timer interrupt program, string
The modules such as port communications program form.
Answer reverse parallel connection one in the both ends of the pneumatic proportional pressure regulator valve each high-speed switch electromagnetic valve on the control circuitry
A diode, during for preventing from powering off suddenly, the inverse electromotive force that electromagnetic valve coil generates damages other electronic devices.
The beneficial effects of the invention are as follows：The pneumatic proportional pressure regulator valve can generate continuously adjustable pressure and ensure
The stabilization of output pressure has good control performance and practicability.
Description of the drawings
Fig. 1 is the system composition figure of the present invention.
Fig. 2 is the work flow diagram of the present invention.
Fig. 3 is the principal function flow chart of the present invention.
In figure：1. air compressor；2. pneumatic piloted reducer；3. gas supply electromagnetic valve；4. exhaust solenoid valve；5. pressure
Sensor.
Specific embodiment
The present invention is described further with reference to the accompanying drawings and examples.
Such as Fig. 1, pneumatic proportional pressure regulator valve is by pilot-operated type pressure regulator valve, two-bit triplet high-speed switch valve, pneumatic pressure transmitter
(MPX5700 of MOTOROLA companies), control circuit, LCD (SMS0424) displays and power module composition.
The hardware control circuit of the system be using the C8051 F020 microcontrollers of Silicon Laboratories companies as
Core, including pressure sensor signal amplification, serial communication, Keyboard Control, high-speed switch valve driving, program download and three ends
The modules such as voltage stabilizing.
Such as Fig. 2, after system electrification, pass through input through keyboard pressure value, activation system.When system detectio to pressure regulation valve outlet pressure
When force value is less than setup pressure value, air inlet electromagnetic valve is opened, and to pressure regulator valve elder generation guide cavity supply, output pressure increases.Simultaneity factor
By the outlet pressure feedback that pressure sensor detects to control circuit, the inclined of output pressure value and setup pressure value is drawn again
Difference calculates controlled quentity controlled variable U.As the input of microcontroller PID control, output pwm signal amplifies through 75452 rp-drives
Inlet and outlet solenoid valve is driven to carry out pressure adjusting to first guide cavity, until main valve plug reaches balance on new position, obtains one
The output pressure proportional to input.
Due to the compressibility of air is big, withered property it is small can bring pressure response hysteresis, easily cause system response vibration etc..Cause
This carries out gas pressure control with apparent non-linear, uncertain, it is difficult to establish accurate mathematical model.PID control
As a kind of common control algolithm, it is maximum the characteristics of be strong robustness, it is not necessary to establish accurate mathematical model.But PID
Ratio, integration and the differential gain coefficient of control be difficult to determine, need to pass through many experiments, heavy workload.
Such as Fig. 3, the software control of the system be using modularized design, by system initialization routine, Keyboard management program,
LCD shows program, data acquisition process program, PID control program, PWM controls program, timer interrupt program, serial communication
The modules such as program form.Debugging and optimization are greatly facilitated using modularization programming.
Claims (4)
1. a kind of pneumatic proportional pressure regulator valve based on pulsewidth modulation, it is characterized in that：The pneumatic proportional pressure regulator valve is by pilot-operated type tune
Pressure valve, two-bit triplet high-speed switch valve, pneumatic pressure transmitter (MPX5700 of MOTOROLA companies), control circuit, LCD
(SMS0424) display and power module composition.
2. a kind of pneumatic proportional pressure regulator valve based on pulsewidth modulation according to claim 1, it is characterized in that：The pneumatic ratio
Example pressure regulator valve hardware control circuit be the C8051F020 microcontrollers using Silicon Laboratories companies as core, bag
Include pressure sensor signal amplification, serial communication, Keyboard Control, high-speed switch valve driving, program download and three-terminal voltage-stabilizing etc.
Module.
3. a kind of pneumatic proportional pressure regulator valve based on pulsewidth modulation according to claim 1, it is characterized in that：The pneumatic ratio
The software control of example pressure regulator valve be using modularized design, by system initialization routine, Keyboard management program, LCD show program,
The modules groups such as data acquisition process program, PID control program, PWM controls program, timer interrupt program, serial communication program
Into.
4. a kind of pneumatic proportional pressure regulator valve based on pulsewidth modulation according to claim 1, it is characterized in that：The pneumatic ratio
One diode of reverse parallel connection is answered at the both ends of example pressure regulator valve each high-speed switch electromagnetic valve on the control circuitry, for preventing from dashing forward
So during power-off, the inverse electromotive force that electromagnetic valve coil generates damages other electronic devices.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611072877.7A CN108119427A (en) | 2016-11-29 | 2016-11-29 | A kind of pneumatic proportional pressure regulator valve based on pulsewidth modulation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611072877.7A CN108119427A (en) | 2016-11-29 | 2016-11-29 | A kind of pneumatic proportional pressure regulator valve based on pulsewidth modulation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108119427A true CN108119427A (en) | 2018-06-05 |
Family
ID=62226203
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611072877.7A Pending CN108119427A (en) | 2016-11-29 | 2016-11-29 | A kind of pneumatic proportional pressure regulator valve based on pulsewidth modulation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108119427A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111879621A (en) * | 2020-07-23 | 2020-11-03 | 华侨大学 | Intelligent dynamic hydraulic loading device |
-
2016
- 2016-11-29 CN CN201611072877.7A patent/CN108119427A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111879621A (en) * | 2020-07-23 | 2020-11-03 | 华侨大学 | Intelligent dynamic hydraulic loading device |
| CN111879621B (en) * | 2020-07-23 | 2022-07-01 | 华侨大学 | Intelligent dynamic hydraulic loading device |
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Legal Events
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| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20180605 |