SBIR Phase I: An Optical Rolling Wheel Deflectometer

9860121 本小型企业创新研究第一阶段项目的研究是开发一种光学测量装置，用于同时测量在标准道路路面上应用重型测试轮所引起的弯沉盆地和路面表面轮廓。该装置是基于几何光学定律来测量来自负载轮的小偏转。该系统依赖于来自激光器的强单色光源，理论上能够精确测量5至30+ mils范围内的偏转。主要优点是：（1）该设备没有移动部件;（2）它可以在以大约10 mph的速度连续移动的同时测量整个挠度盆地。拟议的测试将评估其在现实但受控条件下的能力，使用真实的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。在测试真实的路面时，将仔细测试并验证光学弯沉仪在预期弯沉范围内测量弯沉的准确性。这些测试包括数字数据记录的实验室和简化的现场数据横跨宽度的偏转盆地。 该系统将使路面维修检查的效率提高四到五倍。它将测量整个弯沉盆地，而不是通过今天的设备获得的单点测量，同时测量路面表面轮廓。这一系统将是非常可取的所有政府和私人机构，无论是国内和国外，谁是负责路面维修。

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.