美国科学家日前发明一种检测高速公路路面状况的新方法。对于高速公路路面裂痕的检测 ,通常要派人携带设备沿路步行观察、测量并记录。工作危险且耗时长 ,并且不同人员测量的数据往往还存在差异。美国阿肯色大学的凯尔文·王教授发明了一种新方法。他在一辆汽车后安装了 4盏闪 U.S. scientists recently invented a new method of detecting the condition of the highway pavement. For the detection of highway pavement cracks, it is usually necessary to send someone to carry the equipment along the road for observation, measurement and record. Work is dangerous and time-consuming, and there are often differences between the data measured by different people. Professor Kelvin Wang of the University of Arkansas in the United States invented a new method. He installed four flashes behind a car