針對(duì)車用電線束插接器測(cè)試中全程記錄動(dòng)態(tài)阻抗數(shù)據(jù)的要求，構(gòu)建了一個(gè)基于PXI Express（PXIe）的車用電線束插接器動(dòng)態(tài)阻抗測(cè)試系統(tǒng)。系統(tǒng)硬件由PXIe機(jī)箱（含雙核嵌入式控制器）、PXIe高速數(shù)字化儀、函數(shù)波形發(fā)生器模塊、高精度電流源等組成。系統(tǒng)界面由LabVIEW設(shè)計(jì)，測(cè)試結(jié)果直觀地顯示在顯示器上。系統(tǒng)實(shí)時(shí)監(jiān)控線束端子振動(dòng)試驗(yàn)期間的接觸電阻變化并能完整記錄、顯示波形和打印；監(jiān)控電阻采樣率可達(dá)100M/S，采樣時(shí)間0.01us；在最高實(shí)時(shí)采樣速度和采樣點(diǎn)下，至少保證3小時(shí)的測(cè)試數(shù)據(jù)和記錄；設(shè)備具有判定，報(bào)警及統(tǒng)計(jì)功能。
關(guān)鍵詞： PXIe 車用電線束插接器 動(dòng)態(tài)阻抗 測(cè)試系統(tǒng)
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