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原文传递 AUTOMATED SYSTEM FOR PAVEMENT PROFILE ANALYSIS FROM PROFILOGRAPH TRACES.

题名：	AUTOMATED SYSTEM FOR PAVEMENT PROFILE ANALYSIS FROM PROFILOGRAPH TRACES.
作者：	Devore-J; Hossain-M; Parcells-WH Jr.
关键词：	PROFILOGRAMS-; TRACE-REDUCTION; AUTOMATION-; PROFILE-INDEX; BUMPS-; LOCATIONS-; ALGORITHMS-; COMPARISONS-; MANUAL-ANALYSIS-METHODS; AUTOMATED-PROFILOGRAPHS; REPEATABILITY-
摘要：	An automated method, KSCAN, for reduction of the profilograms produced by the mechanical profilograph into a profile index (PRI) and for identification of bump locations for grinding has been developed. The algorithm followed was the Kansas Test Method KT-46I: Determination of Pavement Profile with the 7.62-m (25-ft) Profilograph. The profilograph trace is scanned to digitize its tracing. An image enhancement program is used to prepare the image for analysis, and then a line is identified, tracked, and digitized. A linear regression analysis is performed to establish the location of the "floating" centerline (corresponding to a "null" or "zero" blanking band) along this line. The PRIs are calculated based on deviation of the line from the floating centerline, and bumps are located based on any specified deviation from a 25.4-mm (1-in.) reference moving baseline. Options are available to incorporate blanking band widths of any value into the PRI calculations. Comparison of the results of profile reduction using the manual methods, automated profilographs, and KSCAN showed that KSCAN results should easily satisfy the KT-46I requirement that the results of comparison between manual trace reduction by the Kansas Department of Transportation and automated trace reduction should not differ by more than 32 mm/km (2 in./mi) on a segment by segment basis (0.16 km or 0.1 mi). Extensive tests indicated that the PRI computed by the KSCAN for a given segment generally varied less than +/-3% from scan to scan, and five or more successive segments showed totals that rarely differed by more than +/-1%. The process has been implemented on a personal computer, and an assembled system consisting of the software, the special scanning hardware, an IBM-compatible 486 computer, and a printer costs under $7,500.
总页数：	Transportation Research Record. 1995. (1505) pp47-56 (2 Fig., 6 Tab., 8 Ref.)
报告类型：	科技报告