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A pressure precision adjustment device

A precision adjustment and pressure technology, applied in the direction of electric fluid pressure control, liquid variable capacity machinery, pump control, etc., to achieve the effect of improving anti-interference ability, high-precision pressure stable adjustment, and low consistency requirements

Active Publication Date: 2016-01-27
WATSON MEASUREMENT & CONTROL TECH HEBEI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the pressure-making system of air pushing liquid, there are similar problems to the air pressure system

Method used

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Embodiment Construction

[0033] The technical solutions of the present invention will be described in further detail below with reference to the accompanying drawings and embodiments.

[0034] The embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0035] Such as figure 2 As shown, the embodiment of the present invention provides a pressure precision adjustment device, which can be seen from the figure. The devices include:

[0036] An actuator (1), which includes an elastic sensitive element (3), an elastic deformation conversion device (4), a stepper motor and a driver (5), a coarse pressure adjustment mechanism (6) and a pressure chamber (11), the The pressure cavity (11) communicates with the cavity of the elastic sensitive element (3), and the internal pressure of the cavity is equal;

[0037] A control mechanism (2), which includes a processor (7), a touch screen (8), an analog-to-digital converter (9), a pressure se...

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Abstract

A device for precisely adjusting pressure, the device comprising: an elasticity sensitive element (3), an elastic deformation conversion device (4), a stepping motor and driver (5), a coarse pressure adjustment mechanism (6), a processor (7), a touch screen (8), an analog-digital converter (9), a pressure sensor (10), and a pressure building chamber (11). The pressure building chamber (11) communicates with the chamber of the elasticity sensitive element (3), the pressure inside the cavities being equal. The pressure sensor (10) senses the pressure in the pressure building chamber (11); an outputted electronic signal is acquired by the analog digital converter (9) and calculated by the processor (7) to obtain a real-time pressure value. The processor (7) compares an error value between a preset pressure value inputted by the touch screen (8) and the current pressure value detected in real time, employs a double closed-loop PI control algorithm to firstly control the coarse pressure adjustment mechanism (6) on the inner-ring to quickly conduct a coarse pressure adjustment, and then to control the rotation direction and angle of the stepping motor on the outer-ring, changes the chamber size of the elasticity sensitive element (3) via the elastic deformation conversion device (4), thus precisely adjusting the pressure. The pressure adjustment and control system has high precision, short adjustment time, low cost and extensive applicability.

Description

technical field [0001] The invention relates to the field of industrial control, in particular to a pressure precision regulating device. Background technique [0002] Pressure measurement plays an important role in industrial process control, and the performance of pressure calibration devices determines the calibration accuracy, efficiency and cost of pressure instruments. Due to its high precision, wide application range, easy operation, functional integration, small size and many other advantages, the automatic pressure calibrator is gradually replacing the traditional piston pressure gauge and is widely used in electric power, petroleum, petrochemical, metallurgy, pharmaceutical and other fields. [0003] Automatic pressure calibrator is mainly divided into pneumatic calibrator and hydraulic calibrator according to the difference of the instrument to be tested. The air pressure calibrator uses non-corrosive gas as the working medium, and is often used to calibrate pre...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05D16/20
CPCF04B49/08
Inventor 孙晓君
Owner WATSON MEASUREMENT & CONTROL TECH HEBEI CO LTD
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