Patent
Vehicle-mounted radar system and detection method
TLDR
In this paper, a modulation frequency setting device sets the modulation frequency on the basis of the vehicle speed data from a vehicle speed detector and the detected range data, causing a low-frequency oscillator to generate a low frequency signal of the set frequency.Abstract:
Modulation frequency setting device sets the modulation frequency on the basis of the vehicle speed data from a vehicle speed detector and the detected range data, causing a low frequency oscillator to generate a low frequency signal of the set frequency. A transmitter transmits an electromagnetic wave (e.g., infrared light) which have been modulated with the low frequency signal. A phase comparator detects the phase difference between the low frequency signal and a detector output, and a range operating device produces range data. Relative speed operating unit finds the relative speed based on the range data. In case of a high vehicle speed, the modulation frequency is set low to extend the detection range. If an object in a short distance is detected, the modulation frequency is set high to limit the detection range to a short range, thereby enhancing the range resolution.read more
Citations
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Patent
Multi-sensor anticipatory object detection system
TL;DR: In this paper, a multi-sensor anticipatory object detection system for detecting the instantaneous range, relative velocity, collision angle and point of impact of a colliding object is presented.
Patent
Vehicle radar system having multiple operating modes
TL;DR: A vehicle radar system includes a processing system which operates in one of a plurality of operating modes which are selected based upon an environment (or changes to an environment) surrounding the radar system as mentioned in this paper.
Patent
Vehicle-mounted radar apparatus
TL;DR: In this paper, a vehicle-mounted radar apparatus consisting of an FM modulator, a voltage controlled oscillator and a signal processor is used to calculate a relative velocity and a relative distance with respect to the preceding vehicle on the basis of the beat signal.
Patent
Anticipatory collision sensor system
TL;DR: In this paper, an anticipatory object detention system includes a transducer device (18) for transmitting a modulated carrier signal from an object, a detection device (22), a range determining device (24) responsive to the amplitude of at least one of the harmonic components for determining the instantaneous range of the object, and a velocity measurement device (26), responsive to a frequency of one or more of the Doppler shifted harmonic components.
Patent
Wide-angle, static and positional anticipatory object detection system
TL;DR: In this article, a wide angle, static, positional anticipatory object detection system includes a transducer device for transmitting a modulated carrier signal and receiving the modulated-carrier signal reflected from an object, a detection device for detecting a plurality of Doppler shifted harmonic components from the reflected modulated carriers signal, a range determining device responsive to the amplitudes of at least two of the harmonic components being equal for determining the instantaneous range of the object and, a predetermined distance thereafter, to a predetermined difference between the amplitude of at most two harmonic components.
References
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Patent
Doppler radar system for automotive vehicles
TL;DR: In this paper, a continuous wave Doppler radar system with a transmitter module and a receiver module is provided for automotive vehicles, where each module includes an antenna system, including a horn, a lens, and a waveguide system, which is attached to a monolithic microwave integrated circuit (MMIC) chip that provides all necessary electronic functions.
Patent
FM radar system
Satoru Komatsu,Hiroshi Kudo +1 more
TL;DR: In this paper, an FM radar system of more simple construction, smaller size, lower cost and improved performance is provided in which circulators of any type in the prior art are eliminated by constructing a transceiver comprised of a transmitting part and a receiving part, each formed on a common dielectric plate.
Patent
Multi-frequency, multi-target vehicular radar system using digital signal processing
TL;DR: In this paper, a vehicle collision avoidance radar system using digital signal processing techniques including a transmit section (202) that generates a two-channel transmit frequency and a Schottky diode mixer (208) generates a difference signal having a frequency equal to the transmit frequency minus the receive frequency.
Patent
Radar system for an anti-collision system for a vehicle
TL;DR: In this paper, a pair of antennas mounted on a vehicle receive an echo wave reflected from an obstacle to produce pair of Doppler signals, the variation of the phase difference of which is used to indicate the direction of the relative movement of the obstacle.
Patent
Vehicle collision anticipating method and device
TL;DR: In this paper, an improvement of a vehicle collision anticipating method and device using transmitted and reflected frequency-modulated continuous waves is provided, where a low frequency wave is produced by mixing a part of transmitted wave and a reflected wave from the object.