A real-time negative pressure simulation device

Abstract

The invention provides a real-time negative pressure simulation device. According to the invention, a PCI (peripheral component interconnect)-1711 board card 2 is installed in a computer 1; the PCI-1711 board card 2 is connected with a pressure-isolating sensor I 8 and a vacuum electric proportional valve 3 via data lines; an atmospheric pressure source 5 is connected with the pipeline connector of the vacuum electric proportional valve 3 through an air filter 4 via a gas pipeline 10; a vacuum pump 6 is connected with the pipeline connector of the vacuum electric proportional valve 3 via the gas pipeline 10; a pressure simulation cabin 7 is connected with the pipeline connector of the vacuum electric proportional valve 3 via the gas pipeline 10; and the pressure simulation cabin 7 is connected with the pressure-isolating sensor I 8 and a pressure-isolating sensor II 9 by means of threaded connection. The real-time negative pressure simulation device provided by the invention can be used for rapidly adjusting the pressure in a pressure container according to the set negative pressure value, and has the characteristics of being high in accuracy and good in real-time performance.

Description

technical field [0001] The invention relates to the technical field of air pressure environment simulation, in particular to a real-time negative pressure simulation device. Background technique [0002] In the development process of aviation and aerospace products, it is necessary to establish various environmental simulation equipment of different scales, and the pressure simulation equipment is an important part of the environmental simulation equipment. For the pressure simulation equipment of the whole machine, the development of the product is long, the capital cost is large, and it is restricted by the experimental conditions, and the pressure parameters are difficult to meet the test requirements. [0003] Patent 201110042703.7 proposes an atmospheric pressure environment simulation device, which is mainly designed to simulate a light-atmosphere transmission environment, and is suitable for the study of physical problems during laser-atmosphere transmission. Patent ...

AI Technical Summary

Problems solved by technology

Due to the large space of the pressure simulation equipment in the large space, the depressurization process has high requirements on the exhaust volume and depressurization rate of the pressure control system. The literature "Design and Verification of Digital Pressure Control System in Vacuum Experiment Chamber" and patent 201010603570.1 respectively designed large capacity The digital pressure control system in the experimental cabin and the pressure control system with PLC as the controller, the structural design and control system design of these two systems are relatively complicated, and are mainly suitable for laboratory environment simulation of specific devices and technologies

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