Collision detection system and method and intake and exhaust test detection system

Abstract

The invention is suitable for the technical field of wind tunnel tests, and provides a collision detection system and method and an intake and exhaust test detection system. The collision detection system comprises a non-contact sealing device, a power source, a voltage sampling resistor, a voltage measuring and stabilizing device and a voltage detection and acquisition device. The non-contact sealing device comprises a first sealing end and a second sealing end; the first sealing end and the second sealing end are in non-contact connection; the first sealing end, the second sealing end, the power supply and the voltage sampling resistor are connected in series; and the voltage measuring and stabilizing device is connected in parallel with the voltage sampling resistor and is connected with the voltage detection and acquisition device. The collision detection system of the non-contact sealing device has the advantages of high test efficiency, high reliability and quick response.

Description

technical field [0001] The invention belongs to the technical field of wind tunnel tests, and in particular relates to a collision detection system and method, and an intake and exhaust test detection system. Background technique [0002] In the process of aircraft research, it is often necessary to study the influence of the intake / exhaust airflow of the aircraft power plant on the overall aerodynamic characteristics of the aircraft, and then simulate the aerodynamic performance of the aircraft during flight, providing an important reference for the improvement of the aircraft. An important means of studying the aerodynamic characteristics of the aircraft in the prior art is to carry out the intake / exhaust test in the wind tunnel. Specifically, during the intake / exhaust wind tunnel test, it is necessary to simulate the intake airflow and exhaust flow when the aircraft power plant is working. It is an effective method to simulate the intake / exhaust airflow of the aircraft po...

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Problems solved by technology

[0004] However, the above method will face the following key problems: (1) During use, in order to ensure the sealing effect, the width of the sealing groove of the sealing device needs to be as small as possible, and the model is exposed to air under certain test conditions during the test. The dynamic load is large, and the elastic deformation displacement of the floating end of the balance is large, which may cause contact or collision at the front / rear end of the sealing device. At this time, the result data obtained by the balance measurement includes some non-aerodynamic loads, which cannot be identified (2) During each test, it is impossible to determine in real time whether or not the sealing device has contacted or collided, and when the contact or collision occurred; (3) The existing identification of some non-aerodynamic loads is mainly done manually based on similar Compared with the test result data under different conditions, manual comparison has the disadvantages of low test efficiency, high test cost, low test result accuracy and possible misjudgment

[0006] 1. Due to the narrow width of the sealing groove of the non-contact sealing device in the prior art, under the test condition of large aerodynamic load, the elastic deformation displacement of the floating end of the balance is relatively large, which may cause contact or collision between the two ends of the non-contact sealing device , so that non-aerodynamic loads are included in the measurement results of the balance, which affects the authenticity of the test results;

[0007] 2. The identification and identification of non-aerodynamic loads in the prior art is mainly through manual comparison and identification of test results under multiple similar conditions, which greatly affects the test efficiency and increases the test cost. At the same time, the accuracy and reliability of manual identification It is difficult to guarantee the reliability, which is easy to lead to misjudgment, and it is also difficult to identify the non-aerodynamic load changes caused by slight collision or contact by manual identification;

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