Toyota Jidosha Kabushiki Kaisha

Kabushiki Kaisha Toyota Chuo Kenkyusho

Makoto Nakai

Toshiaki Watanabe

Daisuke Inoue

Naoyuki Yamada

Tadashi Ichikawa

Tatsuya Yamashita

Shin-ichiro Matsuzawa

Yoshiaki Minami

Akari Nakao

Yuji Oda

A diffraction structure includes a supporting layer, a high refractive index layer, and a low refractive index layer. The high refractive index layer has a first refractive index, is formed above the supporting layer, configures a waveguide guiding input light input from an input terminal along a specific direction, and includes an opening section formed along the specific direction. The low refractive index layer has a second refractive index lower that the first refractive index, and is formed so as to cover the high refractive index layer and fill the opening section. The opening section modifies the input light in at least one of direction or speed according to a wavelength of the input light, and outputs the modified light as output light.

Diffraction structure, diffraction grating, diffraction grating array, optical phased array, optical modulator, optical filter, laser source

A radar apparatus includes a change amount calculation section for obtaining, for each of a plurality of peaks of a first spectrum belonging to the same group, a peak value at the present point in time and calculating the difference between the peak value and a peak value obtained before the present point in time; a ratio calculation section for comparing the obtained difference with a predetermined difference threshold and calculating a ratio of the number of peaks whose differences are greater than the difference threshold to the number of all the peaks belonging to the same group; and a pedestrian determination section for determining that the object is a pedestrian when the calculated ratio is greater than a predetermined ratio threshold and at least one of peaks belonging to the same group differs from the remaining peaks in terms of the sign of the difference.

Radar apparatus

A radar device includes: a receive antenna having a plurality of element antennas disposed in the left-right direction such that at least some of the plurality of element antennas is shifted in the up-down direction from the others; and a position detecting ECU. The position detecting ECU Includes: a first position detecting section, which detects a position of an object in the up-down direction, based on a phase difference between the respective reception signals received by the plurality of element antennas; and a first position correcting section which corrects the position in the up-down direction, based on the history of the position in the up-down direction, and obtains a first corrected position which is a position in the up-down direction after the correction.

Radar device

Growing community of inventors

Nagakute, Japan

Makoto Nakai