[특허]Multi-frequency, multi-target vehicular radar system using digital signal processing

Multi-frequency, multi-target vehicular radar system using digital signal processing 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	G01S-013/00
출원번호	US-0930066 (1992-08-14)
발명자 / 주소	Asbury Jimmie R. (Imperial Beach CA) Woll Bryan D. (Laguna Niguel CA) Malan Van R. (La Jolla CA)
출원인 / 주소	Vorad Safety Systems, Inc. (San Diego CA 02)
인용정보	피인용 횟수 : 98 인용 특허 : 0

초록 ▼

A vehicular collision avoidance radar system using digital signal processing techniques including a transmit section that generates a two channel transmit frequency. An antenna both transmits the transmit signal and receives a reflected receive signal. A Schottky diode mixer generates a difference signal having a frequency equal to the transmit frequency minus the receive frequency. A signal switch in a front end electronics section time demultiplexes and samples the channel 1 and channel 2 signals. The samples are coupled to a two-channel analog to digital (A/D) converter. A digital electronics section receives the digital information and performs a Fast Fourier Transform (FFT) on each channel of digital data to determine relative speed and range of a target based upon the frequency and the difference in phase of the two channels. The digital electronics section also receives information regarding the status of vehicle operation and/or controls to determine the degree of danger presented by an identified target.

대표청구항 ▼

A vehicular radar system for detecting targets about an automotive vehicle having an operator, and warning the operator of dangers presented by the targets, including: a) a microwave transceiver means for transmitting, receiving, and comparing the frequencies of at least two radio frequency (RF) signals, and generating a time-multiplexed output signal of the frequencies; b) front end electronics means, coupled to the microwave transceiver means, for digitizing the time-multiplexed output signal generated by the microwave transceiver means and converting the output signal of the microwave transceiver means from an analog signal to an interleaved sequence of digital data words, each subsequence of digital data words corresponding to one of the frequencies; c) digital electronics means for determining the presence of targets, calculating the range of each target, and calculating the relative speed of each target with respect to the automotive vehicle, including: (1) at least one digital signal processor means, coupled to the front end electronics means, for mapping the digital data words output by the front end electronics means from the time domain to the frequency domain for each subsequence of digital data words to determine the frequency of the received signal from each target; (2) at least one microcontroller means, coupled to at least one of the digital signal processor means, for determining the range of each target from the phase difference between the received signal from such target for each of the RF signals, and for determining the relative speed from the frequency difference between the received signal from such target for each of the RF signals and for tracking the targets and assessing dangers presented by the targets as a function of such determined range and relative speed; and d) display and sensor means coupled to the microcontroller means for presenting a indications to the automotive vehicle operator of the presence of danger presented by the targets.

이 특허를 인용한 특허 (98)

Harris, Fred; Trager, David; Davis, Curtis; Rao, Raghunath K., Adaptive filtering for FMCW interference mitigation in PMCW radar systems.
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Schofield, Kenneth; Lynam, Niall R., Vision system for vehicle.
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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

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Multi-frequency, multi-target vehicular radar system using digital signal processing 원문보기

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Multi-frequency, multi-target vehicular radar system using digital signal processing 원문보기

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