| 摘要 |
PROBLEM TO BE SOLVED: To prevent a rear-end collision accident while generating an accident preventive alarm by checking the reaction of a driver to the fact that distance between cars becomes short and deciding whether or not the driver has done a series of due operations. SOLUTION: When an operation starts, a distance between cars measuring instrument 1 measures the distance to a precedent travel vehicle. At this time, the distance between cars is, for example, 22m. A microcomputer 2 reads in a signal from an operation member 4 linked with an accelerator pedal 3 and stores its value in a memory. Then when the distance between cars veries to <=20m which is predetermined with respect to the measured distance between cars of 22m, the microcomputer 2 reads in an output signal value from the operation member 4. Then the microcomputer 2 compares the stored output signal value from the operation member 4 with the current output signal value and when it judges that a proper measure such as release of the accelerator pedal 3 is not taken although the vehicle distance varies, driver's attention is attracted by an alarm unit 10.
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