Testing device for gas-detonation-driven ultra-high-speed emission

Abstract

The invention discloses a testing device for gas-detonation-driven ultra-high-speed emission. The testing device for gas-detonation-driven ultra-high-speed emission comprises a model and a target chamber measuring section at a position a certain distance away from the model, wherein four observation windows A, B, C and D are sequentially formed in the target chamber measuring section at certain intervals separately; the window A, the window B and the window C are connected with a delay controller separately; a laser system and a camera are arranged at the position of the window D; a projectilepasses through the window A, the window B and the window C of a detection point in sequence, a flight speed is calculated by calculating the flight time between the adjacent detection windows, then the time needing to be delayed is calculated, the delay controller outputs the delay time to control the laser system to flash, and a schlieren image of the projectile passing through the window D is captured through the camera. Higher stability is achieved; higher sensitivity is achieved, and a non-triggering phenomenon is avoided; experimental data is richer, and analysis of experimenters is facilitated; and the time can be corrected manually and accurately.

Description

technical field [0001] The invention belongs to the technical field of ultra-high-speed projectile / model test equipment, and in particular relates to a test device for ultra-high-speed launch driven by gas detonation. Background technique [0002] The gas detonation-driven ultra-high-speed launch test device is used to measure the flight model flow field, attitude and velocity measurement. It is necessary to establish a multi-set shadow (schlieren) camera system on the basis of multiple sets of shadow (schlieren) camera systems in the target room measurement section and configure the model detection and reference system. The measurement and control system is used to obtain test data and pictures. [0003] The method usually adopted in the prior art is the principle of a single observation window, by calculating the distance of the projectile to point AB / the flight time of point AB, the flight speed is calculated, and then the time that needs to be delayed is calculated. But...

AI Technical Summary

Problems solved by technology

[0007] 1. Low sensitivity, often does not trigger

[0008] The speed of the projectile is very fast, and the change in light intensity caused by the rapid flight is too small, so that the detection system cannot detect it and cause no trigger, and cannot take pictures normally

[0009] 2. There are many false triggers

[0012] 3. Insufficient data for analysis after the test

[0013] The signal collected by the acquisition card is not enough to fully analyze the experiment process, and the reason for the experiment failure cannot be analyzed from the detector signal when the experiment fails

When the experiment is normal, the accuracy of the measurement cannot be improved from the signal analysis

[0014] To sum up, the original system in the prior art only calculates the velocity. When the vacuum degree is not high enough or the blasting gas enters the projectile flight space, the projectile does not move perfectly at a uniform speed in the horizontal direction.

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