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Develop Pushcart and Vehicle-Mount Laser Thickness-Measuring Devices for Thermoplastic Pavement Marking Material. Research rept.
| 题名： | Develop Pushcart and Vehicle-Mount Laser Thickness-Measuring Devices for Thermoplastic Pavement Marking Material. Research rept. |
| 作者： | CHEN, X.; CHEN, Y.; EKBOTE, A.; LI, J.; LIU, R.; SUN, W. |
| 关键词： | *Pavement-markings; *Measuring-instruments; *Lasers-.;Thickness-; Thermoplastics-. |
| 摘要： | Based on the research results in Projects 0-4282, lightweight in compact size pushcart and vehicle-mount laser thickness-measurement devices have been successfully developed. The Length, Width, and Height which are 42.5 inches, 29 inches, and 47 inches in the old pushcart version have been reduced to 28 inches, 15 inches and 37 inches in the new pushcart version. The weight of the new pushcart is only the half of the old version. The new pushcart is easy to be handled by one person to conduct routine project monitoring practice. To increase the TPPM thickness measurement speed, a prototype of vehicle-mount laser thickness measurement system is developed. Two independent laser devices are installed onto a golf cart. One laser device shots a laser beam on the pavement with tape, and the other one shots a beam on the pavement without tape. The tape thickness is obtained by processing the output signals from two laser devices. Both lab and field results of the pushcart and vehicle-mount devices are very close to real thickness of thermoplastic. The measurement accuracy can reach 5 mils in both lab and field conditions. An auto-synchronized laser scanning for the 3D measurement of the TPPM thickness is also studied. The optical simulation and some initial tests show that this new method with high speed laser scanning makes a highway speed vehicle-mount TPPM thickness measurement feasible. |
| 报告类型： | 科技报告 |
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