Bar experiment is a usual method that measures high-frequency sensitivity of radio fuze, transmitting methods using electric and optical fiber cables in the early time have some errors and are not convenient. Design and realization of recorder inside mini-bomb is introduced in this paper, AduC812 chip and MGL-24064 high lightness indicator are used to make the instrument small enough to be putted into the projectile of each caliber. High-frequency sensitivity when fuze approaches to the target can be quickly and accurately measured by reasonable program design, at the same time has the function of data call-back and performance analysis and accurate and stable measured data, is a new-type practical bar experiment which measures in the projectile, stores and records data.
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