| 摘要 |
PURPOSE:To moderate the volume and timbre of a horn automatically according to a road environment and/or travel motion situation, by converting the pushing force and pushing depth of a horn button using pressure sensor elements and a car speed or volume of the external noise into electric signals, and controlling an audio frequency oscillator. CONSTITUTION:By using pressure sensor elements instead of electric contacts of push button for horn use, a pressure of pushing button or a pushed depth is detected electrically. An audio frequency oscillator is controlled by this electric signal, and a strong pushing causes a big volume oscillation, while weak pushing, a small volume oscillation. While, the car speed, volume of external noise, travel motion time, etc., are sensed and converted to electric signals and this signal controls the audio frequency oscillator. That is, if a pushing situation of a horn button is the same, the faster car speed or the bigger external noise are controlled by a bigger singing volume of the speaker. Accordingly, a horn can be sounded at a moderate volume and timbre according to the road environment or travel motion automatically.
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