发明名称 |
Rear obstacle detecting system for automotive vehicles |
摘要 |
A rear obstacle detecting system for automotive vehicles includes an ultrasonic transmitter/receiver unit, distance detecting unit and an indicator for measuring distance to an obstacle while a vehicle is in backward movement. The ultrasonic transmitter/receiver unit having a ultrasonic vibrator is always energized as long as the vehicle is in an operating condition irrespective of whether the vehicle is in a backward movement or not, in order to maintain the ultrasonic vibrator being vibrated to achieve a self-cleaning function. The indicator is energized only when the vehicle is in backward movement.
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申请公布号 |
US4404541(A) |
申请公布日期 |
1983.09.13 |
申请号 |
US19810279014 |
申请日期 |
1981.06.30 |
申请人 |
NIPPON SOKEN, INC. |
发明人 |
KODERA, MASAO;AKITA, SIGEYUKI;YOSHINO, YASUHISA |
分类号 |
B60R21/00;B60Q1/52;B60R21/34;G01S7/521;G01S15/93;(IPC1-7):G08G1/00 |
主分类号 |
B60R21/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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