汽车道路试验自适应脉冲数据采集仪的研制

The development of an adaptive data acquisition instrument for pulse signals applied to motor vehicle road test

针对汽车性能道路试验特点研制了脉冲数据采集仪样机。样机中设计了全程采样定时器并根据精度和采样频率要求实时确定每次采样的脉冲组脉冲个数,克服了串行通信速率瓶颈限制和传输延迟对数据处理精度的影响。实车试验表明样机的设计是合理正确的。

The pulse signal DAQ instrument is developed for testing motor vehicle performance.A full range sampling timer is designed and installed in a data acquisition circuit so as to make a real-time determination of the pulse group and pulse number per sampling according to the requirement for the sampling accuracy and rate,thus eliminating the influence of the serial communication rate limit and its transfer time delay on the data processing accuracy.The real motor vehicle road tests show the design of the DAQ instrument is practical and effective.