Dual-channel atmospheric parameter pressure control gas circuit and adjusting method

Abstract

The invention discloses a dual-channel atmospheric parameter pressure control gas circuit and an adjusting method, and belongs to a static pressure measurement calibration instrument. The device comprises a pressure sensor and a pressure component which are sequentially connected through a pipeline to form three main parts which are an air source system, a static pressure channel and a full pressure channel, and a static pressure channel pressure output interface and a full pressure channel pressure output interface are respectively led out and used for being connected with a calibrated atmospheric parameter instrument. In the pressure adjusting process, initial pressure is provided through a pressure / vacuum integrated air pump, the initial pressure is adjusted to the fixed pressure through a reasonably-arranged pressure reducer, the flow of gas entering and discharging the system is controlled through a flow adjusting valve, the opening and closing time of a channel where a stop valve is located is controlled through the stop valve, and finally accurate pressure control is achieved. A flow control mode is adopted for double-channel pressure control, gas pressure control is achieved by increasing or reducing the mass of gas in the closed containing cavity, the situation that a calibrated object has the large load volume can be handled, and the influence on the control speed is small.

Description

technical field [0001] The invention belongs to a static pressure measurement and calibration instrument, and relates to a dual-channel atmospheric parameter pressure control gas circuit and an adjustment method. Background technique [0002] With the development of modern aerospace technology, various aircraft (such as military aircraft, unmanned aerial vehicles, missiles, etc.) have put forward more accurate requirements for the atmospheric parameters measured in flight. [0003] The atmospheric data required by the aircraft usually refers to the relative parameters of the atmosphere around the fuselage of the aircraft during the flight process. The atmospheric data test system is an important system for the aircraft to obtain the flight parameters relative to the external environment during the flight process. Measurement of pressure (total pressure, static pressure), temperature and airflow angle, including true air speed, Mach number, barometric altitude, field pressure...

AI Technical Summary

Problems solved by technology

[0010] In order to solve the problem that the existing single-channel pressure control gas circuit design cannot meet the calibration requirements of atmospheric parameter instruments, the purpose of the present invention is to provide a dual-channel atmospheric parameter pressure control gas circuit and an adjustment method to achieve rapid and high-precision dual-channel pressure Accurate and reliable traceability of atmospheric parameter instruments

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