SBIR Phase I: An Optical Rolling Wheel Deflectometer

9860121这项小型企业创新研究第一期计划是为了研究开发一种光学测量装置，用于同时测量标准路面上使用重型测试轮所引起的弯沉盆地和路面表面轮廓。该装置基于几何光学定律来测量负载轮的微小挠度。该系统依赖于来自激光的强大的单色光源，理论上具有精确测量5到30+密耳范围内的偏转的能力。主要优点是：(1)该装置没有移动部件；(2)它测量整个偏转盆，同时以每小时10英里左右的速度连续移动。建议的测试将在现实但受控的条件下评估其性能，并使用真实路面来评估其在典型路面上发现的可变表面条件下的有效性。光学弯沉仪将被仔细测试和验证，以确保在测试真实路面移动时所预期的弯沉范围内的弯沉的准确性。这些测试包括实验室的数字数据记录和跨偏转盆地宽度的简化的现场数据。这一系统将使路面养护检查的效率提高四到五倍。它将测量整个弯沉盆地，而不是由今天的设备获得的单点测量，并同时测量路面表面轮廓。负责路面维修的所有政府和私人机构，无论是国内的还是外国的，都非常希望使用这个系统。

9860121 This Small Business Innovation Research Phase I project is for research to develop an optical measuring device for simultaneously measuring the deflection basin caused by application of a heavy test wheel on standard road pavement and the pavement surface profile. The device is based on the laws of geometrical optics to measure the small deflections from a load wheel. The system relies on strong, monochromatic light sources from lasers and has the theoretical capability of accurately measuring deflections in the range of 5 to 30+ mils. Major advantages are: (1) the device has no moving parts; and (2) it measures the entire deflection basin while moving continuously at around10 mph. The proposed tests will evaluate its capability under realistic, but controlled conditions, using real pavement to evaluate its effectiveness on the variable surface conditions found on typical pavement. The optical deflectometer will be carefully tested and verified for accuracy in measuring deflections over the range of deflection expected in testing real pavements while moving over the surface. These tests include digital data recording of laboratory and simplified field data across the width of the deflection basin. This system will increase the efficiency of pavement maintenance inspection by a factor of four or five. It will measure the entire deflection basin, rather than the single point measurements obtained by today's equipment and simultaneously the pavement surface profile. This system will be highly desirable to all government and private agencies, both domestic, and foreign, who are responsible for pavement maintenance.