多通道存储式坑道冲击波测试系统设计

Design of a Multichannel Stored Test System for Tunnel Shock Wave

摘要:

随着武器装备的不断发展，弹药威力、科学性、特殊性等方面不断提升，针对坑道的钻地式武器也与日俱增。针对目前对于坑道内冲击波测试的需求逐渐增多，测试要求越来越高，设计了一种针对坑道冲击波的测试系统。采用FPGA软件控制提供了多个可程控参数，赋予系统对不同药量战斗部冲击波测试的通用性；采用数字电位器结合仪表放大器结合以ICP传感器直流偏置，最大程度上降低了传感器自身直流信号对数据的干扰，提高了系统精度与可靠性；采用保留区替换的方法进行FLASH存储器坏块管理，保证了数据存储连续性，避免了因坏块导致通道间数据记录混乱。系统放大器具有1~100倍可调增益，滤波器截止频率40k~500k可调，采样精度16bit，采样频率最高可达每通道2MSPS。经多次实弹测试结果表明，本系统操作便捷，数据符合预期，验证了本系统的可靠性，提供了一种新的坑道内冲击波测试手段。

Abstract:

With the continuous development of weapons and equipment, the power, scientificity and particularity of ammunition are constantly improved, and the burrowing weapons for tunnels are also increasing day by day.In view of the increasing demand for shock wave test in tunnel, the test requirements are getting higher and higher. A test system for shock wave in tunnel is designed.FPGA software control provides a number of programmable parameters, endowing the system with different charge warhead shock wave testing versatility;Digital potentiometer combined with instrument amplifier combined with ICP sensor DC bias, to minimize the interference of the sensor's own DC signal to the data, improve the accuracy and reliability of the system;The bad block management of FLASH memory is carried out by using the method of reserve area replacement, which ensures the continuity of data storage and avoids the chaos of data recording between channels caused by bad blocks.The system has 1~100 times adjustable gain amplifier, the filter cutoff frequency is 40K ~ 500K, the sampling accuracy is 16bit, the sampling frequency can be up to 2MSPs per channel.The results of many live ammunition tests show that the system is convenient to operate and the data meet the expectation, which verifies the reliability of the system and provides a new means of shock wave test in tunnel.