Fujitsu Ten Limited

Shinichi Shibata

Hideki Kajioka

Hiroyuki Ishimori

Hisateru Asanuma

Yasuhiro Kurono

Tokio Shinagawa

A radar apparatus includes a retrieval unit, an estimation unit, a calculation unit, and a determination unit. The retrieval unit retrieves a strong reflection object based on a signal strength which a frequency spectrum of a beat signal generated by mixing a transmission signal which is frequency-modulated and emitted and a reception signal which is formed in the transmission signal is reflected on a target indicates. The estimation unit estimates an estimation orientation which is an orientation of a target assumed to be present around the strong reflection object, based on a relative distance to the strong reflection object. The calculation unit calculates power which is the signal strength for the estimation orientation by generating an orientation spectrum in the estimation orientation based on a frequency component corresponding to the relative distance. The determination unit determines whether there is the target in the estimation orientation based on the power.

Radar apparatus and target detecting method

A radar device () comprising a transmission antenna () for transmitting electromagnetic waves; a reception antenna () for receiving waves; and a detector unit () which detects, based on the reflected waves, the positions of a preceding vehicle and a preceding object, judges the preceding object to be the same as the preceding vehicle if the position of the preceding object is in a predetermined preceding vehicle judging range with the position of the preceding vehicle as a reference, detects the positions of an oncoming vehicle and an oncoming object and judges the oncoming object to be the same as the oncoming vehicle if the position of the oncoming object is in a predetermined oncoming vehicle judging range with the position of the oncoming vehicle as a reference; wherein the oncoming vehicle judging range is set to be narrower than the preceding vehicle judging range.

Radar device

A signal processing apparatus performs an object detection process of detecting object data with respect to peak signals which indicate a difference in frequency between a transmitted signal of which the frequency is changed in a predetermined period and a received signal which is obtained by receiving a reflected wave that corresponds to a transmitted wave which is based on the transmitted signal and is reflected from an object, by deriving the peak signals in a first period where the frequency of the transmitted signal ascends and in a second period where the frequency of the transmitted signal descends and by pairing the peak signals in the first period and the second period. A continuity determination section determines a continuity between the object data and past object data detected prior to the object data. A moving objection data detection section detects newly detected moving object data that has no continuity with the past object data among the object data as a result of continuity determination by the continuity determination section. A position relationship detection section detects a position relationship between the moving object data and other object data. A data determination section re-pairs the moving object data if one object data among the other object data has a predetermined position relationship with the moving object data.

Signal processing apparatus, radar apparatus, object detection system, signal processing method, and computer-readable medium

A vehicle mounted radar device operable to scan a transmission wave to detect a detection point representing a position of an object disposed around the vehicle on the basis of a reflected wave of the transmission wave from the object. The radar device includes a reading unit, a continuity determination unit, a setting unit, anti an object determination unit that are configured to prevent the radar device from erroneously determining different pieces of object information as a single object.

Radar device, object detection system, and object detection method

A radar apparatus is provided. An antenna is configured to transmit a frequency-modulated transmission wave toward an object and receive a reception wave from the object. A mixer is configured to mix the transmission wave with the reception wave to generate a beat signal having a first beat interval and a second beat interval. A detecting section is configured to detect a plurality of first peak signals contained in the first beat interval of the beat signal and a plurality of second peak signals contained in the second beat interval. A grouping section is configured to group the second peak signals. A searching section is configured to search a part of the first peak signals corresponding to the grouped second peak signals. A separating section is configured to separate the part of the first peak signals from the other part of the first peak signals.

Radar apparatus and control method of the same

To provide a radar apparatus capable of rapidly detecting an object at the end of a detecting range. The present invention provides a radar apparatus comprising a radar sensor that transmits a transmitting wave to a predetermined angular range and receives a reflected wave reflected by an object and a processing unit that obtains a peak of strength from a distribution of strength for angle of the received reflected wave and determines the direction of the object based on the peak. The processing unit detects the reflected wave at the end of the angular range and, when the peak is not detected, determines whether the object exists in the direction of the end of the angular range, based on the distribution of strength of the detected reflected wave.

Growing community of inventors

Kobe, Japan

Shinichi Shibata