Proportional valve pair accurate atmosphere controller

Abstract

The invention provides a device for generating and controlling standard pressure signals, which is applied to the fields of aviation, aerospace and pressure metering calibration, to be specific, the invention provides a precise pressure control device based on a pair of proportional valves. The device is composed of double sensors, a pair of proportional valves, a constant flow source, a sensor conditioning circuit, a practical differential circuit, a PID control circuit, a high resolution DA converter, a proportional valve driving circuit and serial interfaces. By the device, a pressure can be controlled to a scope ranging from 0 to 1500KPa, the indefinite degree is 0.01% F.S, the control stability is better than 0.002%F.S, and the pressure control process is fast and stable. The device is suitable for pressure control and detection under various environmental conditions.

Description

technical field [0001] The present invention proposes a device for generating and controlling standard air pressure signals used in the fields of aviation, aerospace, and air pressure measurement and calibration, specifically a proportional valve pair precision air pressure control device. Background technique [0002] With the development of modern science and technology, pressure measurement and testing technology has developed rapidly, not only reflected in the accuracy of pressure measurement, the range of measurement, etc., but also developed from the measurement test and calibration of static pressure in the past to dynamic pressure. The metrological testing and calibration of the measurement system have not only been developed in practice, but also gradually improved in theory. Precise control components, high-precision digital pressure measurement technology, pressure control technology, play an important role in pressure measurement and automatic control, and the co...

AI Technical Summary

Problems solved by technology

[0007] In order to overcome the shortcomings of the existing air pressure detection and control devices, the present invention proposes a proportional valve to a precision air pressure control device

The device solves technical problems such as precision, speed, and accuracy through the combination of high-stable and high-precision analog control circuits, proportional valves to air pressure control components, and dual-sensor control components.

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