| Title | Technology Development and Application for Dynamic Traffic Information (II)- Capability Development and Promotion for Vehicle Detector |
| Dept | Transportation Technology and Information Division |
| Year | 2009 |
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| Summary | Vehicle detectors play an important role in collecting traffic data. In Taiwan, lots of vehicle detectors have been deployed in order to improve ITS (Intelligent Transportation System). Most of these detectors are foreign products therefore, the costs of implementation and maintenance are dominated by foreign agencies. Moreover, these detectors cannot perform well under the complex mixed traffic flow, which consists of motorcycles. To design a vehicle detector which has relatively suitable function compared to foreign products, along with an affordable cost for a large number of deployments, is a main issue in the domestic transportation field. This study applies the vehicle detector prototype from the 2006 and 2007 "Development and Demonstration of Automatic Traffic Information Detection System (I) (II)" and improves its hardware and software. For the hardware, improvements include the systematic integration of the radar antenna, RF (Radio Frequency) module and DSP (Digital Signal Processing). The DSP module retains the advantage of its specification and size, and this study also adds an AGC (Automatic gain control) component to magnify the gain of received radar signals. For the software part, algorithms of automatic lane number recognition and lane boundaries identification are introduced. The algorithms of identifying effective vehicle length, lane width and measuring vehicle passing time duration are strengthened. The computation logic of other traffic parameters is also improved. The RFIC (Radio Frequency Integrated Circuits) proposed in this study integrates all modules into one chip to reduce costs. We expect that the outcomes of this study could drive and cooperate with the domestic manufacturers to produce low-cost and high-accuracy vehicle detectors through technology transfer in the future. Furthermore, vehicle detectors could be implemented more comprehensively and provide more complete traffic information. |
| Post date | 2009/12/01 |
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