Gas pressure fast-regulating device and method based on pulse width modulation mode
What is Al technical title?
Al technical title is built by PatSnap Al team. It summarizes the technical point description of the patent document.
A Gas Pressure, Pulse Width Modulation Technology
Active Publication Date: 2014-01-01
BEIJING CHANGCHENG INST OF METROLOGY & MEASUREMENT AVIATION IND CORP OF CHINA
View PDF5 Cites 11 Cited by
Summary
Abstract
Description
Claims
Application Information
AI Technical Summary
This helps you quickly interpret patents by identifying the three key elements:
Problems solved by technology
Method used
Benefits of technology
Problems solved by technology
[0006] The purpose of the present invention is to solve the problem of difficult pressure regulation due to the large axial thrust of the high pressure gas on the piston in the existing gas variable volume technology, and propose a gas pressure rapid adjustment device and adjustment method based on pulse width modulation, which is more accurate Accurate gas pressure control provides a quick control method for the front stage
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more
Image
Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
Click on the blue label to locate the original text in one second.
Reading with bidirectional positioning of images and text.
Smart Image
Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0042]Gas pressure rapid adjustment device based on pulse width modulation, the device includes a gas circuit part and a circuit part; the gas circuit part includes a gas source 1, a pressure reducing valve 2, a filter 3, a boost solenoid valve 4, and a pressure relief solenoid valve 5 , pressure transmitter 6, gas capacity 8 and test port 9;
[0043] The booster solenoid valve 4 and the pressure relief solenoid valve 5 are all normally closed solenoid valves, which are respectively driven by pulse width modulation, that is, the switching frequency of the solenoid valve is adjusted by changing the period of the control pulse train, and the width of the control pulse is changed. Or the duty cycle, to adjust the length of time for the solenoid valve to be opened or closed;
[0044] The gas source 1 is connected to the pressure reducing valve 2 through a pipeline, the pressure reducing valve 2 is connected to the filter 3 through a pipeline, the outlet of the filter 3 is connecte...
Embodiment 2
[0066] The gas pressure rapid adjustment method based on the pulse width modulation method, the steps are:
[0067] Step 1: The input target pressure value is 0.5MPa, adjust the pressure reducing valve 2, so that the output pressure of the air source 1 is 1.5MPa, and the single-chip microcomputer 11 converts the input target pressure value into a voltage value V proportional to it 1 =2.5V, the pressure transmitter 6 measures the current pressure as 1MPa, and the AD sampling chip 10 collects the voltage value V fed back by the pressure transmitter 6 2 =5.0V, and sent to the single-chip microcomputer 11, the single-chip microcomputer 11 pairs voltage value V 1 , V 2 is compared, the result is V 2 greater than V 1 , immediately the current pressure is greater than the target pressure, the channel B15 of the solid state relay 13 is closed, the 12V voltage is applied to the pressure relief solenoid valve 5, the pressure boost solenoid valve 4 is closed, the pressure relief solen...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more
PUM
Login to view more
Abstract
The invention relates to a gas pressure fast-regulating device and method based on the pulse width modulation mode and belongs to the technical field of static pressure measurement and calibration. The device comprises a gas channel part and a circuit part. The gas channel part comprises a gas source (1), a pressure relief valve (2), a filter (3), a pressurizing solenoid valve (4), a pressure relief solenoid valve (5), a pressure transmitter (6), a gas capacitor (8) and a test port (9). According to the device and method, through the flow control mode, a wider pressure regulating range is obtained, the solenoid valves are driven by adopting the relatively cheap pressure transmitter and reasonable circuit design and combining the pulse width modulation mode to save a large amount of time for digital acquisition and pressure control, and preceding-stage fast control is provided for higher accuracy gas pressure control.
Description
technical field [0001] The invention relates to a gas pressure rapid adjustment device and an adjustment method based on a pulse width modulation method, and belongs to the technical field of static pressure measurement and calibration. Background technique [0002] Pressure, like other physical parameters, is an indispensable control parameter in industrial production processes and automation processes, and its measurement accuracy directly affects the economic benefits of production and energy utilization. Due to the large number and high requirements of pressure verification and calibration, it is necessary to have a high-performance and automatic pressure calibration device. [0003] The traditional gas piston pressure gauge, because it can only generate discrete pressure points and needs to move weights, cannot quickly generate target pressure, etc., is not suitable for on-site calibration and quickly providing target pressure values for external devices. In recent y...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more
Application Information
Patent Timeline
Application Date:The date an application was filed.
Publication Date:The date a patent or application was officially published.
First Publication Date:The earliest publication date of a patent with the same application number.
Issue Date:Publication date of the patent grant document.
PCT Entry Date:The Entry date of PCT National Phase.
Estimated Expiry Date:The statutory expiry date of a patent right according to the Patent Law, and it is the longest term of protection that the patent right can achieve without the termination of the patent right due to other reasons(Term extension factor has been taken into account ).
Invalid Date:Actual expiry date is based on effective date or publication date of legal transaction data of invalid patent.
Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): G05D16/20
Inventor 彭轶盛晓岩李鑫武张贤王丽闫继超
Owner BEIJING CHANGCHENG INST OF METROLOGY & MEASUREMENT AVIATION IND CORP OF CHINA
Login to view more 
Login to view more