針對車用電線束插接器測試中全程記錄動態阻抗數據的要求，構建了一個基于PXI Express（PXIe）的車用電線束插接器動態阻抗測試系統。系統硬件由PXIe機箱（含雙核嵌入式控制器）、PXIe高速數字化儀、函數波形發生器模塊、高精度電流源等組成。系統界面由LabVIEW設計，測試結果直觀地顯示在顯示器上。系統實時監控線束端子振動試驗期間的接觸電阻變化并能完整記錄、顯示波形和打印；監控電阻采樣率可達100M/S，采樣時間0.01us；在最高實時采樣速度和采樣點下，至少保證3小時的測試數據和記錄；設備具有判定，報警及統計功能。
關鍵詞： PXIe 車用電線束插接器 動態阻抗 測試系統
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