Air source structure of large reverberation chamber based on remote control

Abstract

The invention discloses a large reverberation chamber gas source structure based on remote control. The large reverberation chamber gas source structure comprises a liquid nitrogen storage tank, a low-temperature power valve, a water bath type vaporizer, a pressure stabilization tank with a pressure transmitter, and the like. The self-pressurization liquid nitrogen storage tank conveys liquid nitrogen out into the water bath type vaporizer under the internal pressure effect, and the liquid nitrogen is vaporized into nitrogen to enter the pressure stabilization tank; gas in the pressure stabilization tank is conveyed into a gas source distributor and then distributed into front end pipelines of acoustic generators through multiple sets of parallel nitrogen branches; and the opening degree of the valve is controlled through a control device so as to automatically adjust the flows of the nitrogen entering the acoustic generators. Nitrogen flows with any set pressure and set flow rate within the working range can be obtained, the problem of pressure and flow rate instability brought by manual operation is solved, the working efficiency is improved greatly, a system operates stably, theoperation cost is low, and energy consumption is less.

Description

technical field [0001] The invention belongs to the technical field of spacecraft noise environment test, in particular to a large-scale reverberation chamber air source based on remote control. Background technique [0002] Spacecraft will experience harsh noise environment during launch and flight, and the noise environment will induce severe vibration response. The damage or failure of spacecraft is closely related to the intensity of vibration response. Spacecraft noise environment test is an essential means to simulate the noise environment experienced by spacecraft and test the reliability of spacecraft design, and plays an important role in the process of spacecraft development. The spacecraft noise environment test is generally carried out in the reverberation room noise test system, which requires a large test space and a high sound pressure level. The high-power sound source that generates the noise environment generally uses the mechanical energy of the gas to be...

AI Technical Summary

Problems solved by technology

Due to the large air source system, it is generally placed outdoors, and the noise test control personnel and the air source system operators can only communicate by telephone, and the spacecraft noise test time is generally relatively short. The test time is 120s. In a short period of time, it is difficult to obtain a nitrogen flow with a stable pressure and flow rate through manual operation, which will affect the working efficiency of the acoustic generator. Airflow pressure will reach 0.4MPa, the error is very large

In addition, operators directly contact liquid nitrogen and high-pressure nitrogen pipeline valves, posing a major safety hazard

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