一种分布式振动爆炸冲击测试系统的设计

中图分类号:TP751 ?文献标识码:A

摘要:

为满足试验件的局域与广域多工号分布式振动及爆炸冲击环境试验测试需求，开展 1 km 局域与 100 km 广域多试验场地测试信号同步采集与传输技术研究，构建相关分布式测试网络并完成试验验证。针对 1 km 内信号传输，提出模拟信号远程光纤实时传输与复现技术，研制振动、爆炸冲击两类模拟信号传输复现装置实现信号传输；针对 100 km 广域测试，提出基于客户 / 服务器架构的广域组网方案，采用软件虚拟 PTP精确时间同步协议与跨网段静态 IP 识别技术，实现广域分布式振动信号同步采集传输，阐述 PTP协议编程要点。试验表明，1 km 内振动模拟信号可实现幅值 ±10 V、频率 2 kHz、群延迟 10 μs 的实时传输，爆炸冲击模拟信号可实现幅值 0 V～3.3 V、频率 2 MHz 的无失真传输；广域测试系统同步精度优于 10 ms，数据传输速率不低于 12.8 Mbps。所提技术与装置有效适配某试验产品的跨地域多工号分布式环境试验需求，为其分布式综合测试提供了完整可靠的技术解决方案。

Abstract:

To meet the requirements of distributed vibration and explosion shock environmental tests for test systems in local and wide-area multi-channel scenarios, this paper studies the synchronous acquisition and transmission technology of multi-channel test signals in a 1 km local area and a 100 km wide area, constructs a distributed test network, and completes experimental verification. For 1 km signal transmission, a remote real-time optical fiber transmission and reproduction technology for analog signals is proposed. Two kinds of analog signal transmission and reproduction devices for vibration and explosion shock are developed to realize signal remote transfer. For 100 km wide-area testing, a wide-area networking scheme based on client/server architecture is presented. By using software virtual Precision Time Protocol (PTP) and cross-network static IP identification technology, synchronous acquisition and transmission of wide-area distributed vibration signals are realized, and the key points of PTP protocol programming are described. The experimental results show that within 1 km, the vibration analog signal can be transmitted in real time with amplitude of ±10 V, frequency of 2 kHz and group delay of 10 μs, and the explosion shock analog signal can be transmitted without distortion with amplitude of 0 V–3.3 V and frequency of 2 MHz. The wide-area test system achieves synchronization accuracy better than 10 ms and data transmission rate not less than 12.8 Mbps. The proposed technologies and devices effectively adapt to the cross-regional multi-channel distributed environmental test requirements of weapon systems, providing a complete and reliable technical solution for their distributed comprehensive testing.