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In JAPAN some ICCs (Intelligent Cruise Control systems) with recognition systems using Laser Radar have been produced since 1995. However these recognition systems have some improvement challenges; 1) Improvement of detectability for less reflective objects, 2) Improvement of identification performance of a vehicle to be tracked in the same lane (a target vehicle), 3) Improvement of detection performance under bad weather condition. We are developing a New Recognition System using sensitive Laser Radar with APD (Avalanche Photo Diode) as a solution for these challenges. In this paper, we will describe our experimental system using sensitive Laser Radar, especially, algorithm for target vehicle recognition and its performance.

Two types of the Fuel Composition Sensor (FCS) are under development for the following purposes; (1) Detection of methanol concentration in methanol blended gasoline fuel for FFV. (2) Detection of gasoline quality, heavy or light, for vehicles using ordinary gasoline at the fuel. Measurement of refractive index or dielectric constant is effective for the purpose of above (1), and measurement of refractive index is effective for the purpose of above (2). Of the sensors of these two types, the FCS of new optical type which has been developed earlier is descrived in this report. The FCS is designed compact, has a high response, and gives liner voltage output within any desired range of refractive index. As the primary advantages, the FCS is resistive to deposits on optical parts and is highly durable as a result of applying refractive method and photo-position detection system.