车用电线束插接器动态阻抗测试系统

针对车用电线束插接器测试中全程记录动态阻抗数据的要求，构建了一个基于PXI Express（PXIe）的车用电线束插接器动态阻抗测试系统。系统硬件由PXIe机箱（含双核嵌入式控制器）、PXIe高速数字化仪、函数波形发生器模块、高精度电流源等组成。系统界面由LabVIEW设计，测试结果直观地显示在显示器上。系统实时监控线束端子振动试验期间的接触电阻变化并能完整记录、显示波形和打印；监控电阻采样率可达100M/S，采样时间0.01us；在最高实时采样速度和采样点下，至少保证3小时的测试数据和记录；设备具有判定，报警及统计功能。
关键词： PXIe 车用电线束插接器 动态阻抗 测试系统
technology was established. The system hardware was composed of PXIe box, PXIe high speed digitalizer, PXIe arbitrary waveform generator, high precision currency sourse and so forth. And the system operating interface was designed by LabVIEW, a virtual
instrumentation software, with direct test results displayed on screen. This system can measure dynamic resistance and output alarm. Measurement result shows the maximum sampling rate is 100 million per second and can record at least 3 hours.
Key words：PXI express, vehicle electronic line connector, measurement system, dynamic resistance