火箭橇试验用多参量同步采集系统设计

Design of Multi-parameter Synchronous Acquisition System for Rocket Sled Test

摘要:

为满足侵彻引信火箭橇试验高速触靶极端环境下多参数同步测量需求，设计22通道高精度同步采集系统。采用模块化功能分区设计，构建电源模块与三个测量模块；各测量模块以FPGA驱动A/D转换器与Flash存储器完成数据采集存储，由同一晶振保障同板采样同步，利用数字触发采集与模拟信号交叉输入时间差修正技术实现多模块间高精度同步；采用多级缓冲防护结构提升系统抗高冲击能力。系统可实现侵彻引信、加速度及应变信号200 kHz/通道同步采集，同步精度优于100 ns。在516 m/s和578 m/s触靶速度下，系统可有效捕获侵彻全程多参数信号，为武器性能评估提供关键数据支撑。

Abstract:

A 22-channel high-precision synchronous acquisition system is designed for multi-parameter measurement in high-speed impact tests of penetration fuze rocket sleds. The system uses a modular structure with one power module and three measurement modules. An FPGA controls A/D converters and Flash memory to complete data acquisition and storage. A single crystal oscillator ensures synchronous sampling on the same board. High-precision synchronization between modules is realized by digital trigger and analog cross-input time difference correction. A multi-stage buffer structure improves the system’s high-impact resistance. The system achieves 200 kHz per channel synchronous sampling for fuze, acceleration and strain signals. Synchronization accuracy is better than 100 ns. Tests are carried out at impact velocities of 516 m/s and 578 m/s. The system captures full penetration signals effectively and provides key data for weapon performance evaluation.