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Pressure regulating device

A technology of pressure regulation and pressure, applied in the direction of measuring device, fluid pressure control, measuring fluid pressure, etc., to achieve the effect of low consistency requirements, simple production, and improved anti-interference ability

Active Publication Date: 2015-06-03
WATSON MEASUREMENT & CONTROL TECH HEBEI CO LTD
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  • 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

[0027] The technical solutions of the present invention will be described in further detail below with reference to the accompanying drawings and embodiments.

[0028] Such as figure 2 As shown, the embodiment of the present invention provides a pressure regulating device that uses temperature control for precise pressure regulation, and the device includes an actuator (1) and a control mechanism (2). An actuator (1), comprising a temperature sensing chamber (3), a temperature control device (4), a rough pressure regulating mechanism (5) and a pressure generating chamber (10), the pressure generating chamber (10) and the temperature sensing chamber The cavities (3) are communicated, and the internal pressures of the cavities are equal; the control mechanism (2) includes a processor (6), a touch screen (7), an analog-to-digital converter (8), and a pressure sensor (9). The control mechanism composed of the pressure sensor 9, the analog-to-digital converter 8, and the processo...

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Abstract

A pressure adjusting device comprises a temperature-sensing chamber (3), a temperature control device (4), a coarse pressure adjusting mechanism (5), a processor (6), a touch screen (7), an analog-to-digital converter (8), a pressure sensor (9) and a venting / sucting cavity (10). The pressure sensor (9) senses the pressure in the venting / sucting cavity (10), the analog-to-digital converter (8) collects output electrical signals, the processor (6) calculates the collected electrical signals, and a real-time pressure value is obtained. The processor (6) compares an input pressure set value from the touch screen (7) and a pressure current value detected in real time, then obtains the error value, adopts a dual- closed-loop PI control algorithm, firstly controls the coarse pressure adjusting mechanism (5) of an inner loop to carry out coarse pressure adjustion fast, and then controls the temperature control device (4) of an outer loop, the chamber volume of the temperature-sensing chamber (3) is changed by controlling temperature, and accordingly the function of precise pressure adjustion is achieved. The pressure adjusting control system of the pressure adjusting device is high in precision, simple in structure, low in cost and wide in applicability.

Description

technical field [0001] The present invention relates to the field of industrial control, in particular to a double-closed-loop PI control method to control the volume change of a conventional rough pressure adjustment mechanism and a pressure vessel made of a high thermal expansion coefficient, so that the two can work together to realize pressure control. Fine adjustment. 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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05D16/20G01L27/00
CPCG01L27/002G01L27/005G05D16/2013
Inventor 郑德智丁伟
Owner WATSON MEASUREMENT & CONTROL TECH HEBEI CO LTD
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