Communications: directive radio wave systems and devices (e.g. – Return signal controls external device – Radar mounted on and controls land vehicle
Patent
1998-02-02
2000-05-23
Lobo, Ian J.
Communications: directive radio wave systems and devices (e.g.,
Return signal controls external device
Radar mounted on and controls land vehicle
342 71, 342109, G01S 1393
Patent
active
06067038&
ABSTRACT:
A vehicle-mounted radar apparatus comprises: a transmitting-receiving device 8 including an FM modulator 1 for generating an FM modulation signal, a voltage controlled oscillator 2 for generating an electromagnetic wave subjected to FM modulation by the FM modulation signal, a transmitting antenna 4 for transmitting the FM-modulated electromagnetic wave, a receiving antenna 6 for receiving the electromagnetic wave reflected by a preceding vehicle 5, and a mixer 7 for mixing the FM-modulated electromagnetic wave and the electromagnetic wave from the receiving antenna and for outputting a beat signal; a signal processor 9 for computing a relative velocity and a relative distance with respect to the preceding vehicle on the basis of the beat signal; and a scanning mechanism 12 for rotatively driving the transmitting-receiving device, wherein a modulation period of the FM-modulated electromagnetic wave and a rotation angle range of the scanning mechanism are changed in accordance with the relative velocity and the relative distance with respect to the preceding vehicle.
REFERENCES:
patent: 5694130 (1997-12-01), Suzuki et al.
patent: 5745070 (1998-04-01), Yamada
patent: 5767803 (1998-06-01), Yamada
patent: 5793325 (1998-08-01), Yamada
Uehara Naohisa
Watanabe Masahiro
Lobo Ian J.
Mitsubishi Denki & Kabushiki Kaisha
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