A Synchronous Automatic Sampling and Measurement System for Wind Tunnel Experiments

Abstract

The present invention provides a synchronous automatic sampling and measurement system for wind tunnel experiments. The system includes: a gas storage control cabinet system, a gas analysis system and a data acquisition control system; the gas storage control cabinet system includes: a gas storage cylinder, a solenoid valve, and a vacuum pump and a sampling flowmeter; the gas analysis system includes: a gas analyzer, a gas suction pump, a gas path control panel and a gas path sampling pipe; the sampling measurement system is an N-point simultaneous sampling measurement system consisting of M shunt systems, Each branch system controls K sampling measurement points, and each branch can be turned on and off independently, where N=MK, and N, M, and K are all positive integers. The system provided by the present invention is based on the actual needs of wind tunnel experimental research. While ensuring measurement accuracy, multi-point synchronous measurement solves the simultaneity of multi-point measurement data, improves the accuracy of wind tunnel experiments, and effectively reduces the analysis time. cost.

Description

technical field [0001] The invention belongs to the technical field of concentration field measurement in wind tunnels, and in particular relates to a synchronous automatic sampling measurement system for wind tunnel experiments. Background technique [0002] The wind tunnel experiment is a kind of box-shaped experimental equipment that artificially generates and controls the air flow to simulate the flow of gas around the research object, measure the effect of the air flow on the entity, and observe physical phenomena. One of the most commonly used and effective tools for dynamic experiments. In recent years, as people continue to pay attention to environmental issues, various pollution incidents in the atmospheric environment, such as: industrial pollution discharge, hazardous chemical leakage, vehicle exhaust and dust haze control, etc. need to be carefully studied, and the governance and Emergency measures, and wind tunnel experiment is an effective method to study the ...

AI Technical Summary

Problems solved by technology

[0003] For the diffusion of pollutants in the actual atmospheric environment, when simulating with the physical simulation method of wind tunnel experiment, the ideal is to measure the concentration of all sampling points at the same time, and give the concentration field distribution of the tracer at a certain moment, but now Concentration measurements in wind tunnel experiments are generally made at a single point or several points for multiple measurements

For example, in wind tunnel experiments, it is often necessary to measure the concentration distribution of a certain horizontal or vertical surface, and it is necessary to measure data at the same time as many measurement points as possible. Due to the time difference of multiple measurements, there is continuity between each measurement and changes in environmental conditions. and other issues, so the experimental results have great uncertainty

[0004] Simultaneous measurement of tracer gas at multiple points in wind tunnel experiments has always been a difficult problem for people. For example, the most direct method for simultaneous measurement of 60 points is to use 60 gas analyzers for detection. The analysis cost reaches 4 million and requires a large number of personnel. It is difficult to guarantee the accuracy of experimental data, and it cannot be realized in actual work

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