Design of the electric properties test system of capacitance proximity fuze for HE

In order to estimate the quality variety law of the stockpile capacitance proximity fuze for HE scientifically and provide a kind of technical instrument for the army to monitor the quality of the capacitance proximity fuze for HE, this article designs an electric properties test system of capacitance proximity fuze for HE. This test system is designed based on the virtual instrument technology and it uses a varactor network as the core. The article firstly analyses the basic principles of the capacitance fuze to detecting targets. Then the article points out that the essential of actualizing normal function of the fuze in laboratory conditions is to simulate the target function process on the fuze. The purpose to do this is to make the detector of the test fuze generate a variable demodulation signal just like the test fuze encountered a real target. Based on the above principle, this article puts forward the overall design scheme of the electric properties test system of capacitance proximity fuze for HE and detailedly designs the virtual instrument test platform, the signal conditioning circuit, the target effect simulation platform and the power supply. Taking the varactor network as the core, using the shielding box and the test interface equipment, the target effect simulation platform is constructed. On the basis of the virtual instrument technique, the test platform of the virtual instrument is constructed. According to modularizing design principle, the test software is developed on the platform of Lab VIEW edition 8.5. This article mainly designs modules of simulation bias voltage generation, target signatures signal fitting, data output and acquisition, data analyse and display, data storage and data called and displayed. Lastly, the engineering prototype of the test system is manufactured. In order to validate the function of the test system, we draw out stochastically 5 capacitance proximity fuzes for HE as the test object and finish the functionality experiment. The test results indicate that the designing scheme is reasonable, the technic is feasible, and the test system can satisfy the needs of electric properties test of the capacitance proximity fuze for HE.