Hitachi, Ltd.

Clarion Co

Mitsutoshi Morinaga

Shoji Muramatsu

Takehito Ogata

Katsuyuki Nakamura

Hiroshi Shinoda

Keiichiro Nagatsuka

Takashi Tsutsui

Toshiyuki Nagasaku

Hiroto Mitoma

An environment recognizing device for a vehicle is provided that can correctly detect a preceding vehicle in a scene, such as for instance the dusk, which is under an illumination condition different from that in the daytime. The device detects a vehicle external shape while detecting vehicle taillights, and determines a region in which the vehicle external shape and the vehicle taillights move in synchronization, as a vehicle.

Environment recognizing device for a vehicle and vehicle control system using the same

In a conventional automotive radar, a return occurs in a phase difference characteristic necessary for a super-resolution method, resulting in an increase of a detection error, or an extremely narrowed azimuth detection range. A transmitting array antenna, and receiving array antennas are composed of antenna elements respectively, and aligned in a horizontal direction. The weighting of receiving sensitivities of the antenna elements of the receiving array antennais A, A, A, and A, which are monotonically decreased from an inner side toward an outer side as represented by A&#x2267;A&#x2267;A&#x2267;A. On the other hand, the receiving array antennais symmetrical with the receiving array antenna with respect to the receiving array antenna

Mobile radar and planar antenna

A radar apparatus capable of determining the position of targets at a high accuracy even when plural objects of an identical relative velocity are present in a detection view field of the radar, using signal processing of obtaining an effect which is similar with that of virtually increasing the number of antennas along the moving direction of the radar by determining the change of intensity of reception signals using data in the past in which an identical antenna was positioned at a slightly different place (T) and data at present (T+&#x394;T) as a unit data set.

Radar apparatus and method of measuring azimuth angle of target

The radar apparatus of the present invention can obtain distance to a target and speed with higher accuracy even when multiple targets are running within a detecting field of a radar. The radar apparatus can transmit a radio wave by alternately switching a section having a frequency slope and a section having no frequency slope with the radar for simultaneously transmitting a couple of frequencies having a frequency difference. Measurement of distance to the target and relative speed is conducted in the above two sections, results of measurement are compared with each other in the adjacent sections, and the result of measurement is determined correct only when there is no inconsistency in these measurement results.

Radar apparatus and signal processing method

An inexpensive surveillance radar apparatus capable of identifying the kind of an object by using a monopulse radar that performs wide-angle two-dimensional surveillance. The radar apparatus receives reflected waves from a plurality of points on a moving object within a monitoring area, using a monopulse radar apparatus for measuring of angles, and determines the reflection point for each reflected wave, and then calculates the position and the width in the measuring angle of the surveillance radar of a moving object.

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Tokyo, Japan

Mitsutoshi Morinaga