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NTIS 바로가기국가/구분 | United States(US) Patent 등록 |
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국제특허분류(IPC7판) |
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출원번호 | US-0797803 (1985-11-13) |
우선권정보 | JP-0239998 (1984-11-14) |
발명자 / 주소 |
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출원인 / 주소 |
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인용정보 | 피인용 횟수 : 3 인용 특허 : 5 |
A vehicle speedometer is disclosed which accurately measures vehicle velocity despite significant vehicle vibration, which causes variation of the angle of incidence of the measuring wave. Two transceivers are mounted on the vehicle, along with means to determine a frequency difference and an angle
A vehicle speedometer comprising: (1) a first transmitting and receiving means installed on a vehicle and directed towards a road surface in a predetermined angle q1 with respect to the road surface, for transmitting the measuring wave of frequency f1 towards the road surface and receiving the refle
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