| 摘要 |
PROBLEM TO BE SOLVED: To provide a configuration pertaining to a rainfall measurement device for vehicles using a rainfall detection function mounted in a vehicle, with which it is possible to measure rainfall more accurately.SOLUTION: A rainfall measurement device 10 for vehicles includes a rainfall specification circuit 14 and a correction circuit 15 in a rainfall measurement unit 11-1. Since a falling speed varies with the size of raindrops, the rainfall specification circuit 14 has a plurality of filters having a filter characteristic that corresponds to the size of raindrops, and a plurality of counters corresponding to each filter. The correction circuit 15 corrects a rainfall specified by the rainfall specification circuit 14 on the basis of a travelling associated element caused to occur by the running of a vehicle.SELECTED DRAWING: Figure 1 |
