Abstract: : In order to ensure the accurate selection of the effective standard area for the snake test, two methods of selecting the effective marker area for the snake test, namely, the peak mark and the photoelectric trigger mark were studied and compared. Through simulation and test comparison, the accuracy of the two methods of snake passing speed was found that the speed calculated by the photoelectric trigger mark method was more accurate than that the peak mark method, and the photoelectric trigger mark method could significantly improve the uncertainty of the test results at the reference speed, ensure the accuracy of test results.

Key words: Commercial vehicle; Pylon course slalom; Effective stake area; Uncertainty; Photoelectric trigger mark; Peak mark

摘要： 为确保蛇行试验有效标准区的准确选取，研究对比了峰值标记和光电触发标记两种蛇 行试验有效标桩区选取方法，通过仿真和试验比对两种方法蛇行通过车速的准确性，发现光 电触发标记法计算得到的车速比峰值标记法更为准确，并且光电触发标记方法可显著提升基 准车速下试验结果不确定度，保证试验结果的准确性。

关键词: 商用车；蛇行试验；有效标桩区；不确定度；光电触发标记；峰值标记