Hitachi Astemo Ltd.

Hitachi Automotive Systems, Ltd.

Chugai Seiyaku Kabushiki Kaisha

Akira Kitayama

Keisuke Yamamoto

Hiroshi Kuroda

Hideyuki Nagaishi

Akira Kuriyama

Goichi Ono

Tadashi Kishimoto

Daichi Murata

Satoshi Sasaki

Katsumi Ouchi

Yukinori Akamine

Takeshi Sasoh

An arithmetic operation device causes a convolution arithmetic unit to perform a convolution arithmetic operation between a filter and target data corresponding to a size of the filter in each of a plurality of convolution layers constituting a neural network. The arithmetic operation device includes: a bit reduction unit that reduces a bit string corresponding to a first bit number from a least significant bit of the target data and reduces a bit string corresponding to a second bit number from a least significant bit of a weight that is an element of the filter for each convolution layer; and a bit addition unit that adds a bit string corresponding to a third bit number obtained by adding the first bit number and the second bit number to a least significant bit of a convolution arithmetic operation result output from the convolution arithmetic unit by inputting the target data and the weight after being reduced by the bit reduction unit to the convolution arithmetic unit.

Arithmetic operation device and arithmetic operation method

A reception power supplying unit generates each of reception signals before and after a switching operation. A signal processing circuit generates each of difference signals before and after the switching operation on the basis of the reception signal and a reference signal. A phase difference detector calculates, as a transmission phase difference, the phase difference between transmission power supplying units on the basis of the respective difference signals, and adjusts a phase shift amount on the basis of the transmission phase difference and a set phase difference that is previously set.

Radar sensor

The present invention minimizes the overall area occupied by a reception antenna while preventing erroneous detections resulting from azimuth aliasing. A reception antenna includes antenna elements that are disposed along the horizontal direction, antenna elements that are disposed along the vertical direction, and an antenna element that is disposed at an angle from the antenna elements with respect to the horizontal direction and is disposed at an angle from the antenna elements with respect to the vertical direction. The distance between the centers of the antenna elements in the horizontal direction differs from the distances between the center of the antenna element and the respective centers of the antenna elements in the horizontal direction. The distance between the centers of the antenna elements in the vertical direction differs from the distances between the center of the antenna element and the respective centers of the antenna elements in the vertical direction.

Radar device and antenna device

The present invention provides an antenna comprising: a radiation unit that is formed on a substrate; a waveguide that propagates therein radio waves radiated from the radiation unit and radiates the radio waves as a beam; and a dielectric lens that is arranged in an opening of the waveguide and has an incident plane facing the radiation unit and a radiation plane radiating radio waves entered from the incident plane. The radiation plane of the dielectric lens has a plane orientation different from a flat plane perpendicular to the radiation direction of the beam.

Antenna, array antenna, radar apparatus, and in-vehicle system

The present invention provides a radar device capable of reducing processing load while arraying receiving antennas in two directions. In the present invention, a transmitting unit (transmitting antenna) transmits an electromagnetic wave. A plurality of receiving antennasreceive a reflected wave from an object which reflects the electromagnetic wave, and convert the reflected wave into a first signal Sig. A plurality of receiving circuitsare respectively connected to the receiving antennasand generate a second signal Sigfrom the first signal Sig. A signal processing unitprocesses the second signal Sig. The plurality of receiving antennasare arrayed in a first direction and a second direction crossing the first direction. The signal processing unitswitches the combination of the second signal Sigthat is processed, for each frame indicating a time period extending from when the transmitting antenna transmits the electromagnetic wave to when the signal processing unitprocesses the second signal Sig

Radar device

The present invention realizes stable operation of a radar device even if there is radio wave interference between multiple radar devices. A radar deviceis provided with the following: an oscillatorthat generates a modulated signal that has undergone frequency modulation; a transmission unitthat emits a transmission signal that has undergone frequency modulation during a prescribed modulation operation period using the modulated signal generated by the oscillator; a reception unitthat receives a reception signal which is the transmission signal that has been reflected off of an object in the area; and a signal processing unit. The signal processing unitis provided with: an object information calculation unit that calculates information of an object on the basis of the reception signal; an interference state analysis unit that measures a surrounding radio wave interference state, from a prescribed minimum frequency Fmin to a maximum frequency Fmax, during a search modulation operation period that does not overlap the modulation operation period; and a band selection unit that selects a frequency band of the transmission signal on the basis of the radio wave interference state measured by the interference state analysis unit.

The present invention is an antenna provided with: a plurality of radiating parts formed on a base plate; a waveguide tube inside of which radio waves emitted from the radiating parts propagate; a lens having a plurality of curved surfaces having a substantially hyperbolic shape and disposed in an opening of the waveguide tube; and a protruding part formed in a tapered shape between the plurality of radiating parts. The tip of the protruding part is formed at a position lower than an opening surface.

Antenna, sensor, and vehicle mounted system

Provided is an antenna which includes a plurality of radiating portions which are formed on a substrate and a plurality of dielectric lenses for respectively converting a spherical wave radiated from each radiating portion into a plane wave, wherein the shape of a cross section of each dielectric lens perpendicular to a radiation direction of a beam is formed in a shape which radiates a beam which is narrower in a second direction than in a first direction orthogonal to the second direction, and the plurality of dielectric lenses are arranged side by side in the second direction so that beams radiated from the respective dielectric lenses are synthesized.

Growing community of inventors

Hitachinaka, Japan

Akira Kitayama