Design Of Measure System Of Blast Wave Overpressure Generated By Underwater Explosions

In this paper, measure system of blast wave overpressure generated by underwater explosions is researched, whose context is the study of underwater explosions. The system makes underwater blast pressure sensor,circuit module and power supply together, and put down in solid steel shell, which makes up of the underwater shock wave measurement system working independently, and can lay in underwater. This is of water-repellent, high SNR, low power consumption, the delay time and trigger level programmed adjustable. The memorized technique of underwater overpressure measurement has advantages of anti-interference and no-need of cable, and is specially fit for measure of underwater explosions.This thesis includes several points as follows:a)According to the analysis in the course of underwater blast, combines with some aspects like actual test characteristics, requirement of test environment and design and implement of hardware circuit, the suitable sampling frequency is attained.b)The project of system design and system constitute is put forward. The thesis mainly designs systemic hardware based on the general systemic scheme. Under the principle of the low power consumption design, the simulated signal which is output from blast sensor is disposed and transformed into digital signal by disposal signal circuit and A/D switch. Then the digital signal is stored in the memorizer. Connecting this system to computer through USB communication interface, the testing data could be read.c)The software is designed which includes the program about the part of MCU, the part of USB communication interface and the part of PC.d)It proposed the calibration method of the system, and the system is calibrated.