| 摘要 |
PURPOSE: A coasting driving noise measurement system is provided to raise the Pass-by noise test ability since the tire of the various types is mountable, to improve the stability since the instrument, not the test, travels, and to attain the effect that the accuracy of test is improved by excluding all the effects of the vehicles. CONSTITUTION: The coasting driving noise measurement system(100) includes: a trailer(110); a sand section(120); a motor part(130); and a reflective plate(140). The trailer is mountable to the use of the truck tire and the tire for passenger car used in the Pass-by noise test. The sand section is needed for the trailer to brake automatically after passing by the test section in the middle of the Pass-by noise test. The motor part controls the drive of trailer. The motor part is installed in both sides of the trailer progressive direction to drive in the center of the test section by the fixed speed. The reflective plate is installed in both sides of trailer in the driving of trailer. The reflective plate grasps the location of trailer.
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