电缆故障在线检测定位装置研究

电缆作为飞机电源系统的重要组成部分,实现电缆故障的在线诊断,可以提高其可靠性。采用扩展频谱时域反射法(SSTDR),基于FPGA技术,设计一种板级速率为500 MHz的飞机电缆故障在线检测和定位装置,并进行实验验证。结果表明:该装置能够实现电缆开路、短路以及间歇性电弧的在线检测和定位,具有定位精度高、实时性好等优点;利用该装置在线监测电缆的健康状态,实现难以复现的间歇性故障的检测,能够提高地面运营、维护效率,节省人力物力,具有较高的工程应用价值。

Research on Cable Fault Online Detection and Location Device

As an important part of aircraft power supply system, it is particularly important to realize cable fault online diagnosis and improve reliability. This paper designs a cable fault online detection and location device with the 500MHz board level rate based on FPGA by Spread Spectrum Time Domain Reflectometry (SSTDR), according to the characteristics of aircraft cable faults and the specification of aircraft cable detection. The instrument can realize the online detection and location of the open circuit, short circuit and intermittent arc of cables, and has the advantages of high positioning accuracy and good real-time performance. Using this device to monitor the health state of the cable fault on-line and realize the detection of the intermittent fault which is difficult to reappear, it can improve the efficiency of ground operation and afterwards maintenance to save a lot of manpower and material resources and has higher engineering value.