Automated real-time dimension measurement of moving vehicles using infrared laser rangefinders

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dc.contributor.authorHalvorson, Glenen_US
dc.date.accessioned2024-08-14T16:41:54Z
dc.date.available2024-08-14T16:41:54Z
dc.date.copyright1995en_US
dc.date.issued1995
dc.degree.departmentDepartment of Mechanical Engineering
dc.degree.levelMaster of Applied Science M.A.Sc.en
dc.description.abstractIn the last few years, much research and development has been carried out on Intelligent Vehicle-Highway Systems (IVHS) due to increased demand on the current transportation infrastructure. One aspect of IVHS is the development of automatic vehicle classification systems. The Automatic Vehicle Dimension Measurement System (AVDMS) has been de­veloped by a team of Engineers at the University of Victoria and the British Columbia Ministry of Transportation and Highways. The research and development included in this thesis forms the main part of the AVDMS project. The developed system allows vehicles to be classified based on height, width, length, or overall volume. The AVDMS consists of two high-speed infrared laser range-finding scanners, an in­frared laser vehicle speed sensor, a high-speed data acquisition board, and an 80486 computer to process the data. In this thesis, vehicle dimension measurement methods are discussed, as well as, the processes which led to the selection of the range sensing solution for the AVDMS. Background on range sensing techniques and range data processing are provided. A brief overview of geometric model generation and multiple-view fusion is included to help the reader understand range sensing applications and the possibilities for other related applications of this technology. The reader is also provided with a detailed look at vehicle dimension measurement, including description and specifications of the AVDMS range-finding scanners, and technical details on the AVD MS method of range data acquisition and vehicle dimension measurement. The vehicle speed measurement problem is reviewed including an overview of the investigations, a de­scription and comparison of the different measurement methods, and a detailed look at the speed measurement solution. The layout of the AVDMS hardware configu­ration is presented, as well as, descriptions and flowcharts of the AVDMS software. Results of the AVDMS prototype testing in the laboratory and on the highway with a number of highway travelling vehicles are provided to demonstrate the capability and usefulness of the system. A number of potential applications for the technology used in the AVDMS are discussed as a possibility for future work. The AVDMS is to be installed on the approach causeway to the Tsawwassen ferry terminal at Tsawwassen, British Columbia, where it will measure the maximum length, width, and height of commercial and oversize vehicles travelling at speeds up to 120 km/hr. Vehicle height and width will be measured to within 15 cm and vehicle length to within 30 cm. This information will be used for determining the fare for each vehicle based on its volume. Volume is calculated as the product of a vehicle's dimension maximums, that is, the maximum height, width, and length measured by the AVDMS system. The measurements and calculations are made in real-time as each vehicle passes through the system helping reduce queue sizes at the toll booths and improving efficiency. The automatic real-time vehicle dimension measuring system (AVDMS) developed in this work is the first system capable of automatically measuring the dimensions of vehicles travelling at highway speeds. The AVDMS system demonstrates new capabilities of laser range-finding devices. The development of this technology may lead to many other applications.
dc.format.extent117 pages
dc.identifier.urihttps://hdl.handle.net/1828/18021
dc.rightsAvailable to the World Wide Weben_US
dc.titleAutomated real-time dimension measurement of moving vehicles using infrared laser rangefindersen_US
dc.typeThesisen_US

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