Mitsubishi Electric Corporation patent applications published on November 9th, 2023

Patent applications for Mitsubishi Electric Corporation on November 9th, 2023

MOTOR, FAN, AND AIR CONDITIONER (18245648)

Main Inventor

Ryogo TAKAHASHI

Brief explanation

The patent application describes a motor with several components, including a rotor, a stator, a circuit board, a mold resin part, a lead wire, and a cover member made of resin. 

• The motor includes a rotor and a stator, with a circuit board attached to the stator.
• A mold resin part covers the stator and the circuit board.
• A lead wire is connected to the circuit board and drawn out of the mold resin part.
• A cover member made of resin is provided on the mold resin part.
• The cover member and the outer circumferential surface of the mold resin part create a housing space for the lead wire.
• The cover member has a hole through which the lead wire is drawn out of the housing space.

Abstract

A motor includes a rotor, a stator surrounding the rotor, a circuit board attached to the stator, a mold resin part covering the stator and the circuit board, a lead wire connected to the circuit board and drawn out of the mold resin part, and a cover member provided on the mold resin part and made of a resin. The cover portion and an outer circumferential surface of the mold resin part form a housing space in which the lead wire is housed. The cover portion has a hole portion through which the lead wire is drawn out of the housing space.

INDOOR UNIT AND REFRIGERATION CYCLE DEVICE (18027235)

Main Inventor

Atsushi KONO

Brief explanation

The patent application describes an indoor unit for air conditioning systems.

• The unit consists of a main body attached to an installation section, with an opening near the target space.
• A panel covers the opening and has an air inlet and outlet for suctioning and discharging air.
• A fan is provided in the main body to generate airflow by suctioning air from the panel's inlet and blowing it out from the outlet.
• A bell mouth is positioned before the fan to guide the suctioned air towards it.
• An electric component box is located before the bell mouth, creating an air-flowing space and housing a control unit for the fan's operation.

Abstract

An indoor unit includes: a main body having an opening near an air-conditioning target space and attached to an installation section; a panel having an air inlet through which air is suctioned and an air outlet through which the suctioned air is discharged, and covering the opening of the main body; a fan provided to the main body and generating flow of air that is suctioned from the air inlet of the panel and blown out from the air outlet of the panel; a bell mouth provided upstream of the fan in the main body and guiding the air suctioned from the air inlet toward the fan; and an electric component box provided upstream of the bell mouth in the main body, to thereby define an air-flowing space between the electric component box and the bell mouth, and accommodating a control unit that controls operation of the fan.

LEARNING DEVICE AND INFERENCE DEVICE FOR STATE OF AIR CONDITIONING SYSTEM (18245015)

Main Inventor

Mitsuhiro ISHIGAKI

Brief explanation

The patent application describes a learning device that acquires operation data from an air conditioning system and converts a specific model into a trained model using this data. The operation data includes various parameters related to the system's performance. The specific model estimates a specific parameter based on the other operation data. The specific parameter includes the operating frequency of the compressor, the degree of opening of the expansion valve, and the amount of air blown per unit time by the blower.

• Learning device for air conditioning systems
• Acquires operation data from the system
• Converts a specific model into a trained model
• Operation data includes various parameters
• Specific model estimates a specific parameter based on other operation data
• Specific parameter includes compressor frequency, expansion valve opening, and blower airflow

Abstract

The learning device includes: a first data acquisition unit; and a model generation unit. The first data acquisition unit is configured to acquire operation data of an air conditioning system. The model generation unit is configured to convert a specific model into a trained model using the operation data. The operation data includes a specific parameter and at least one of a temperature of air passing through the second heat exchanger, a temperature and a pressure of refrigerant, and a temperature outside a space where each of at least one indoor unit is arranged. The specific model estimates the specific parameter from the operation data other than the specific parameter. The specific parameter includes at least one of an operating frequency of the compressor, a degree of opening of the expansion valve, and an amount of air blown per unit time by the blower.

REFRIGERATION CYCLE DEVICE (18044844)

Main Inventor

Kenta MURATA

Brief explanation

The patent application describes a refrigeration cycle device that can provide both cooling and heating functions.

• The device has a refrigerant flow path that allows for a counter flow of air and refrigerant during both cooling and heating.
• This design reduces the amount of refrigerant needed by allowing low-pressure two-phase refrigerant to flow through a liquid pipe.
• The device includes an outdoor unit with a compressor, a four-way valve, an outdoor heat exchanger, and an outdoor expansion valve.
• It also includes an indoor unit with an indoor heat exchanger and an indoor expansion valve.
• The outdoor and indoor units are connected by a gas pipe and a liquid pipe.
• The device can switch between cooling and heating operations using the four-way valve.
• It includes either a first bridge circuit or a second bridge circuit, both of which have flow path opening-closing units.
• The first bridge circuit allows the refrigerant to flow through the outdoor heat exchanger in the same direction during both cooling and heating.
• The second bridge circuit allows the refrigerant to flow through the indoor heat exchanger in the same direction during both cooling and heating.

Abstract

To provide a refrigeration cycle device that has a refrigerant flow path with a structure to form a counter flow of air and refrigerant not only during cooling, but also during heating, and that allows low-pressure two-phase refrigerant to flow through a liquid pipe and can thereby reduce the amount of refrigerant needed. The refrigeration cycle device includes: an outdoor unit  including a compressor , a four-way valve , an outdoor heat exchanger , and an outdoor expansion valve , the four-way valve  being configured to switch between cooling operation and heating operation; an indoor unit  including an indoor heat exchanger  and an indoor expansion valve ; and a gas pipe  and a liquid pipe  configured to connect the outdoor unit  and the indoor unit ; and at least either one of a first bridge circuit  having a configuration including a plurality of flow path opening-closing units  to allow the refrigerant to flow through the outdoor heat exchanger  in the same direction both during the cooling operation and during the heating operation, and a second bridge circuit  having a configuration including a plurality of flow path opening-closing units  to allow the refrigerant to flow through the indoor heat exchanger  in the same direction both during the cooling operation and during the heating operation.

DISTRIBUTOR, HEAT EXCHANGER AND AIR CONDITIONER (18042674)

Main Inventor

Atsushi TAKAHASHI

Brief explanation

The patent application describes a distributor used in a refrigeration system.

• The distributor has multiple flow paths for the refrigerant.
• The refrigerant flows in a first direction from an inflow unit towards an outflow unit.
• Two second flow paths branch off from the first flow path.
• Two third flow paths are provided for the refrigerant to flow in the opposite direction.
• Two fourth flow paths protrude from the main body in a direction intersecting the third flow paths.
• Two fifth flow paths allow the refrigerant to flow in the first direction again.

Abstract

A distributor includes at least: a first flow path through which refrigerant flowing in from a refrigerant inflow unit flows in a first direction toward a heat transfer tube disposed on the side of a refrigerant outflow unit; two second flow paths branched from the first flow path; two third flow paths, through each of which the refrigerant flows in a second direction opposite to the first direction; two fourth flow paths, each of which is formed to protrude from a main body toward the second direction and through each of which the refrigerant flows in a third direction intersecting the two third flow paths; and two fifth flow paths, through each of which the refrigerant flows in the first direction.

HEAT EXCHANGER AND AIR-CONDITIONING APPARATUS INCLUDING HEAT EXCHANGER (18025939)

Main Inventor

Nanami KISHIDA

Brief explanation

The patent application describes a heat exchanger that includes multiple heat transfer pipes, a header, and a fin.

• The heat transfer pipes are spaced apart from each other in one direction.
• The header has insertion holes where the front ends of the heat transfer pipes are inserted from a different direction.
• A fin is attached to the heat transfer pipes.
• The header has a divider that separates it into two spaces - one with the insertion holes and another connected to a refrigerant pipe.
• The divider has an opening surrounding the front ends of the heat transfer pipes.
• This heat exchanger can be used as a condenser or an evaporator in an air-conditioning apparatus.

Abstract

A heat exchanger includes a plurality of heat transfer pipes provided at spacings from each other in a first direction, a header having an insertion hole in which a front end of each of the plurality of heat transfer pipes is inserted from a second direction orthogonal to the first direction, and a fin attached to heat transfer pipes. The header includes a divider configured to divided the inside of the header into a first space in which the insertion hole is provided and a second space to which a refrigerant pipe is connected. The divider is provided with an opening surrounding the outer periphery of the front end of the heat transfer pipe as seen from the second direction. An air-conditioning apparatus includes the heat exchanger as a condenser or an evaporator.

HEAT EXCHANGER AND REFRIGERATION CYCLE APPARATUS (18247236)

Main Inventor

Akira YATSUYANAGI

Brief explanation

The patent application describes a heat exchanger design that includes a fin and a heat transfer tube.

• The fin extends in a widthwise direction and a longitudinal direction, and the heat transfer tube passes through the fin.
• The fin consists of a planar portion and multiple first and second protruding portions.
• The first protruding portions are curved downward in the longitudinal direction, while the second protruding portions are curved upward.
• Each second protruding portion surrounds a through hole in the fin.
• The vertices of the first and second protrusions are located at the same position in the widthwise direction.

Abstract

A heat exchanger includes: a fin extending in a widthwise direction along an air flow direction and extending in a longitudinal direction crossing the air flow direction; and a heat transfer tube passing through the fin. The fin includes a planar portion, and a plurality of first protruding portions and a plurality of second protruding portions that protrude from the planar portion. The plurality of first protruding portions include a first projection curved downward in the longitudinal direction, and a second projection curved upward in the longitudinal direction. Each of the plurality of second protruding portions surrounds a corresponding one of the plurality of through holes. A vertex of the first projection and a vertex of the second projection are located at the same position in the widthwise direction.

MAP DATA MANAGEMENT APPARATUS AND MAP DATA MANAGEMENT METHOD (18026382)

Main Inventor

Seigo KANAZAWA

Brief explanation

The abstract describes a map update controller for a map data management apparatus.

• The controller predicts which parts of the map data will be requested by a map application.
• It identifies meshes (sections) of the map data that are not up-to-date in the map database.
• These identified meshes are considered "update-necessary" meshes.
• The controller performs a first map update process to immediately update the map data of the update-necessary meshes if it can be done before the map application requests them.
• If the map data cannot be updated immediately, the controller performs a second map update process at a specific timing determined by a predefined condition.
• The purpose of this innovation is to ensure that the map data used by the map application is always up-to-date and accurate.

Abstract

A map update controller of a map data management apparatus predicts meshes whose pieces of map data will be requested from a map application, and identifies meshes whose pieces of map data stored in the map database are not latest as update-necessary meshes, from among the predicted meshes whose pieces of map data will be requested. The map update controller performs a first map update process of immediately updating pieces of map data of the update-necessary meshes when the pieces of map data of the update-necessary meshes can be updated before the map application requests the pieces of map data of the update-necessary meshes, and performs a second map update process of updating the pieces of map data of the update-necessary meshes at the timing that an operation of the map application satisfies a predefined condition when the pieces of map data cannot be updated.

OBJECT SCANNING DEVICE, CONTROL CIRCUIT, STORAGE MEDIUM, AND OBJECT SCANNING METHOD (18223319)

Main Inventor

Michiya HAYAMA

Brief explanation

- The patent application describes an object scanning device that uses radio waves to generate an image of a measurement subject.

- The device radiates radio waves of multiple frequencies towards the measurement subject and captures the reflected waves. - A phase composite image generation unit is included in the device, which combines multiple images obtained from the reflected waves. - The combination is done by performing complex addition for each pixel of the images. - The resulting phase composite image provides a comprehensive representation of the measurement subject. - The purpose of this innovation is to simplify the imaging process and improve the accuracy of the generated image.

Abstract

An object scanning device generates an image of a radio wave scatterer that is a measurement subject disposed in a measurement area based on reflected waves of radio waves including a plurality of frequencies radiated to the radio wave scatterer, and includes a phase composite image generation unit that generates a phase composite image into which a plurality of images obtained through imaging based on the reflected waves are composed by performing complex addition for each pixel of the plurality of images.

RADAR SIGNAL PROCESSING DEVICE AND RADAR SIGNAL PROCESSING METHOD (18223708)

Main Inventor

Tomoya YAMAOKA

Brief explanation

The patent application describes a radar signal processing device that includes several components to improve the accuracy of target object detection and measurement. 

• The device forms beams using reception signals.
• It compensates for phase within a certain frequency range.
• It generates an image of each beam by applying Fourier transform in an azimuth direction.
• The device identifies the position of a target object based on the generated image.
• It calculates the power of each beam at the position of the target object.
• It computes the antenna gain of each beam at the position of the target object.
• The device measures the angle on the target object using maximum likelihood estimation by comparing the power of each beam with the antenna gain of each beam at the target object's position.

Abstract

A radar signal processing device includes: a forming unit to form beams by using reception signals; a compensation unit to compensate for a phase within a range frequency; a generation unit to generate an image of each beam by applying Fourier transform in an azimuth direction to the beams (with phases compensated; an identification unit to identify a position of a target object based on the image; a calculation unit to calculate power of each beam represented by the image of each beam at a position of the target object; a computing unit to compute an antenna gain of each beam at a position of the target object; and an angle measurement unit to measure angle on the target object by performing maximum likelihood estimation of comparing the power of each beam with the antenna gain of each beam at the position of the target object.

DATA PROCESSING APPARATUS, DATA PROCESSING METHOD, AND COMPUTER READABLE MEDIUM (18221472)

Main Inventor

Takefumi HASEGAWA

Brief explanation

The patent application describes a system for estimating the movement of a vehicle using both camera and LiDAR data. 

• The system includes a camera installed on the vehicle and a camera movement amount acquisition unit that calculates the estimated movement amount of the vehicle based on the image data captured by the camera.
• In addition to the camera, the system also includes a LiDAR movement amount acquisition unit that calculates a more accurate estimated movement amount of the vehicle using LiDAR data.
• The camera movement amount and the LiDAR movement amount are acquired in synchronization with each other.
• A comparison decision unit compares the camera movement amount with the LiDAR movement amount.
• If the difference between the camera movement amount and the LiDAR movement amount is less than a threshold value, the system decides to use the camera movement amount for a calibration operation.

Abstract

A camera movement amount acquisition unit () acquires as a camera movement amount (), an estimated movement amount of a vehicle () calculated using photographed image data acquired by, a camera () installed on the vehicle (). In synchronization with the acquisition of the camera movement amount () by the camera movement amount acquisition unit (), a LiDAR movement amount acquisition unit () acquires as a LiDAR movement amount (), an estimated movement amount of the vehicle () with higher estimation accuracy than estimation accuracy of the camera movement amount (). A comparison decision unit () compares the camera movement amount () with the LiDAR movement amount (), and decides to use the camera movement amount () for a calibration operation when a difference between the camera movement amount () and the LiDAR movement amount () is less than a threshold value.

WRONG-WAY DRIVING DETERMINATION APPARATUS AND WRONG-WAY DRIVING DETERMINATION METHOD (18029464)

Main Inventor

Takumi KASHIHARA

Brief explanation

This patent application describes a system for determining if a vehicle is driving in the wrong direction. Here are the key points:

• The system uses a surroundings monitoring sensor to gather information about the vehicle's surroundings.
• A road information generation unit uses this information to generate details about the road, including the location and proper direction of each lane.
• A travel state information calculation unit uses the surroundings information to determine the location and direction of the vehicle on the road.
• A wrong-way driving determination unit calculates the possibility of the vehicle driving in the wrong direction based on the road information and the vehicle's travel state information.
• The system then determines if the vehicle is indeed driving the wrong way based on the value of the wrong-way driving possibility.

Abstract

In a wrong-way driving determination apparatus, a road information generation unit generates, based on surroundings information acquired by a surroundings monitoring sensor of a subject vehicle, road information including information on a location and a proper direction of travel of each lane of a road on which the subject vehicle is traveling. A travel state information calculation unit calculates, based on the surroundings information, travel state information including information on a location and a direction of travel of the subject vehicle on the road on which the subject vehicle is traveling. A wrong-way driving determination unit calculates a wrong-way driving possibility of the subject vehicle based on the road information and the travel state information, and determines whether the subject vehicle is traveling the wrong way based on a value of the wrong-way driving possibility.

WAVEGUIDE-MICROSTRIP LINE CONVERTER (18026132)

Main Inventor

Takashi MARUYAMA

Brief explanation

The patent application describes a waveguide-microstrip line converter.

• The converter includes a waveguide with an open end and a dielectric substrate with two surfaces.
• A ground conductor is connected to the open end and has a slot in a specific region.
• A line conductor is provided on the second surface of the substrate.
• The line conductor has a conversion section, a microstrip line, and an impedance transformer.
• The conversion section converts power between the line conductor and the waveguide.
• The microstrip line is located at a distance from the conversion section.
• The impedance transformer matches the impedance between the conversion section and the microstrip line.
• A hole is formed in the conversion section.

Abstract

A waveguide-microstrip line converter includes a waveguide having an open end, a dielectric substrate having a first surface facing the open end and a second surface facing the opposite direction to the first surface, a ground conductor provided on the first surface and connected to the open end, the ground conductor being provided with a slot in a region enclosed by the end face of the open end, and a line conductor provided on the second surface. The line conductor includes a conversion section that performs power conversion between the line conductor and the waveguide, a microstrip line-provided at a distance from the conversion section in a first direction, and an impedance transformer provided between the conversion section and the microstrip line, for performing impedance matching between the conversion section and the microstrip line. A hole is formed in the conversion section.

PHASED ARRAY ANTENNA CALIBRATION METHOD AND PHASED ARRAY ANTENNA CALIBRATION SYSTEM (18025644)

Main Inventor

Takashi MARUYAMA

Brief explanation

The patent application describes a method for calibrating a phased array antenna.

• The phased array antenna consists of multiple transmission modules and a reception module.
• Each transmission module includes a phase shifter, an amplifier, and a transmission antenna.
• The reception module includes a reception antenna.
• The method involves receiving a reflected wave, which is a radio wave transmitted from the transmission antenna of each transmission module and reflected outside the phased array antenna.
• Based on the amplitude and phase of the reflected wave received, the method adjusts the phase shifter and amplifier of each transmission module.

Abstract

A method for calibrating a phased array antenna is provided. The phased array antenna includes multiple transmission modules each including a phase shifter that changes a phase of a high frequency signal output from a signal source, an amplifier that amplifies an amplitude of the high frequency signal, and a transmission antenna that converts the high frequency signal into a radio wave, and a reception module including a reception antenna. The method includes a step of receiving, by the reception antenna, a reflected wave that is a radio wave transmitted from the transmission antenna of each of the multiple transmission modules and reflected outside the phased array antenna, and a step of adjusting the phase shifter and the amplifier of each of the multiple transmission modules based on an amplitude and a phase of the reflected wave received.

OPTICAL SEMICONDUCTOR DEVICE (18043018)

Main Inventor

Ryosuke NAGAO

Brief explanation

The patent application describes an optical semiconductor device that includes a semiconductor substrate, a semiconductor laser, an optical multiplexer/demultiplexer circuit, a first waveguide portion, and a second waveguide portion.

• The device is designed to multiplex or demultiplex the output light of the semiconductor laser.
• The second output light is outputted from an end face of the semiconductor substrate.
• The third output light is amplified by an optical amplifier in the second waveguide portion.
• The reflecting portion in the second waveguide portion includes a diffraction grating that reflects the amplified third output light back to the semiconductor laser.
• The semiconductor laser and the reflecting portion form a resonator.

Abstract

An optical semiconductor device according to the present disclosure includes a semiconductor substrate, at least one semiconductor laser provided on the semiconductor substrate, an optical multiplexer/demultiplexer circuit provided on the semiconductor substrate, multiplexing or demultiplexing first output light of the semiconductor laser and outputting second output light and third output light, a first waveguide portion provided on the semiconductor substrate, and outputting the second output light from an end face of the semiconductor substrate, and a second waveguide portion including an optical amplifier amplifying the third output light and a reflecting portion and provided on the semiconductor substrate, wherein the reflecting portion includes a diffraction grating that reflects the third output light amplified by the optical amplifier to feed back to the semiconductor laser via the optical amplifier and the optical multiplexer/demultiplexer circuit, and the semiconductor laser and the reflecting portion form a resonator.

TWO-DIMENSIONAL PHOTONIC-CRYSTAL LASER (17908202)

Main Inventor

Susumu NODA

Brief explanation

The patent application describes a two-dimensional photonic-crystal laser design.

• The laser includes a substrate made of an n-type semiconductor.
• A p-type cladding layer is placed on top of the substrate, made of a p-type semiconductor.
• An active layer is positioned on top of the cladding layer.
• A two-dimensional photonic-crystal layer is placed on top of the active layer, consisting of a plate-shaped base body made of an n-type semiconductor.
• The photonic-crystal layer includes modified refractive index areas that differ from the base body.
• A first tunnel layer made of an n-type semiconductor with a higher carrier density than the substrate is located between the substrate and cladding layer.
• A second tunnel layer made of a p-type semiconductor with a higher carrier density than the p-type semiconductor layer is placed between the first tunnel and cladding layers.
• A first electrode is located on the lower side of or within the substrate.
• A second electrode is positioned on the upper side of the two-dimensional photonic-crystal layer.

Abstract

A two-dimensional photonic-crystal laser includes: a substrate made of an n-type semiconductor; a p-type cladding layer on an upper side of the substrate made of a p-type semiconductor; an active layer on an upper side of the cladding layer; a two-dimensional photonic-crystal layer on an upper side of the active layer including a plate-shaped base body made of an n-type semiconductor wherein modified refractive index areas whose refractive index differs from the base body are arranged; a first tunnel layer between the substrate and cladding layer made of an n-type semiconductor having a carrier density higher than the substrate's; a second tunnel layer between the first tunnel and cladding layers, made of a p-type semiconductor having a carrier density higher than the p-type semiconductor layer's; a first electrode on a lower side of or in the substrate; and a second electrode on an upper side of the two-dimensional photonic-crystal layer.

SEMICONDUCTOR LASER DEVICE (18044959)

Main Inventor

Kimio SHIGIHARA

Brief explanation

The patent application describes a semiconductor laser device with a specific structure for guiding laser beams.

• The device includes various layers such as cladding layers, optical guide layers, and a contact layer.
• It also has a resonator with a front end surface and a rear end surface.
• The device features a ridge region that guides the laser beam between the front and rear end surfaces.
• The ridge region consists of a ridge inner region with a specific refractive index and ridge outer regions on both sides.
• The ridge outer regions have current non-injection structures and a width greater than the distance to the active layer.

Abstract

A semiconductor laser device of the present disclosure includes: a first-conductivity-type cladding layer, a first-conductivity-type-side optical guide layer, an active layer, a second-conductivity-type-side optical guide layer, a second-conductivity-type cladding layer, and a second-conductivity-type contact layer laminated above a semiconductor substrate; a resonator having a front end surface and a rear end surface; and a ridge region for guiding a laser beam between the front and rear end surfaces. The ridge region is composed of a ridge inner region in which an effective refractive index is n, and ridge outer regions which are provided on both sides of the ridge inner region and in which an effective refractive index is n, the ridge outer regions having current non-injection structures. A ridge outer region width Wis greater than a distance from a lower end of each current non-injection structure to the active layer.

POWER CONVERSION DEVICE (17785913)

Main Inventor

Kenji FUJIWARA

Brief explanation

The patent application describes a system for connecting multiple DC-DC converters in parallel.

• The system includes two groups of converters, each performing PWM switching with a different carrier frequency.
• Each group is assigned one or more converters.
• The system offers multiple drive modes, allowing for different combinations of driven converters and converter groups.
• The drive modes are determined by comparing a preset threshold value with the total output of all converters.
• The system ensures that the ratio between total outputs in the first and second converter groups falls within a predetermined range.

Abstract

For connected-in-parallel N DC-DC converters ( to N, where N is 3 or more), a first converter group on which PWM switching is performed with a first carrier, and a second converter group on which PWM switching is performed with a second carrier having a phase different from that of the first carrier, are provided. One or more of the DC-DC converters ( to N) are assigned to each converter group. A plurality of drive modes in which the number of the DC-DC converters that are driven and the converter groups are set, are provided. The drive modes are switched through comparison between a preset threshold value and a total output of the N DC-DC converters ( to N), and a ratio between total outputs in the first and second converter groups is set to fall within a predetermined range.

Power Conversion Device (18246252)

Main Inventor

Fuminori NAKAMURA

Brief explanation

The patent application describes a power conversion device that converts power between an AC circuit and a DC circuit.

• The device includes a self-commutated power converter and a control device.
• The control device controls the switching operation of a switching element in the power converter.
• When a control command value for the power converter reaches or exceeds a certain threshold value, the control device increases the switching frequency of the switching element.
• This allows for more efficient power conversion and improved performance of the power conversion device.

Abstract

A power conversion device includes a self-commutated power converter that performs power conversion between an AC circuit and a DC circuit, and a control device that controls switching operation of a switching element included in the self-commutated power converter. The control device performs first control to increase a switching frequency of the switching element when a control command value for the self-commutated power converter becomes equal to or greater than a first threshold value.

DIGITAL-TO-ANALOG CONVERTER (18223861)

Main Inventor

Shuichi SAKATA

Brief explanation

- The patent application describes a digital-to-analog converter (DAC) that converts digital signals into analog voltage waveforms.

- The DAC consists of multiple 1-bit elements, each of which outputs a current based on the value indicated by the input digital signal. - These 1-bit elements are connected to a capacitive load, which helps generate the analog voltage waveform. - Each 1-bit element includes a switching circuit that adjusts the bias of the voltage within the element based on the input digital signal. - The switching circuit also controls the connection and disconnection with a power supply based on changes in the bias. - The innovation in this patent application lies in the design and configuration of the 1-bit elements and the switching circuit, which enable accurate and efficient conversion of digital signals into analog voltage waveforms.

Abstract

A digital-to-analog converter includes a plurality of 1-bit elements each of which outputs a current corresponding to a value indicated by a digital signal when the digital signal is input; and a capacitive load connected to the plurality of 1-bit elements, the digital-to-analog converter being configured to generate an analog voltage waveform via the capacitive load that receives currents output from the plurality of 1-bit elements, wherein each of the 1-bit elements includes a switching circuit to change a bias of a voltage in each of the 1-bit elements according to a value indicated by an input digital signal, and to switch connection and non-connection with a power supply according to a change in the bias.

COMMUNICATION APPARATUS (18222070)

Main Inventor

Shigenori KITANAKA

Brief explanation

- The patent application describes a communication apparatus with multiple receiving antennas that receive interference signals and desired signals transmitted by a transmitting apparatus.

- The apparatus includes an interference suppressor that generates weights for each receiving antenna to combine the reception signals and perform interference suppression. - The interference suppressor applies reverse sequence multiplication processing to vary interference forms in the reception signals. - Different combinations of reception signals are used to generate different weights for interference suppression. - The interference suppressor selects weights that strengthen the desired signals when performing interference suppression.

Abstract

A receiver that is a communication apparatus includes a plurality of receiving antennas that receives, as reception signals, interference signals and desired signals transmitted by a transmitting apparatus that performs sequence multiplication processing at the time of transmission, and an interference suppressor that generates, for each of the receiving antennas, a weight used when combining the reception signals received by the respective receiving antennas, and performs inter-antenna combining that is combining of the reception signals, using the weights, to perform interference suppression on the reception signals. The interference suppressor performs reverse sequence multiplication processing on the reception signals to vary interference forms in the reception signals, generates the weights differently for different combinations of the reception signals on which to perform the interference suppression, and performs the interference suppression using, from among the generated weights, the weights by which the desired signals strengthen each other.

TERMINAL AND BASE STATION (18221088)

Main Inventor

Shigenori TANI

Brief explanation

The patent application describes a terminal that can be installed in a machine with rotor blades in a communication system.

The terminal and a base station communicate with each other through a relay station. The terminal includes a rotor blade state monitoring unit that measures the timing at which the rotor blades block the communication path between the relay station and the terminal. The terminal also includes a transceiver that transmits the rotor blade state to the base station. The transceiver uses radio resources allocated by the base station to transmit data. The innovation in this patent application is the ability to monitor the state of the rotor blades and transmit this information to the base station. This allows for better communication and coordination between the terminal and the base station. The use of radio resources allocated by the base station ensures efficient transmission of data.

Abstract

A terminal to be installed in a machine having rotor blades in a communication system in which the terminal and a base station transmit and receive data via a relay station to and from each other, includes a rotor blade state monitoring unit that monitors a rotor blade state by measuring the timing at which the rotor blades block a communication path in midair between the relay station and the terminal, and a transceiver that transmits the rotor blade state to the base station and transmit the data using radio resources allocated by the base station.

CONTROLLER, CONTROL CIRCUIT, AND RESOURCE ALLOCATION METHOD (18223902)

Main Inventor

Kenichi NAKURA

Brief explanation

The abstract describes a controller that manages resources and connections in a wireless access network.

• Physical network information is obtained, including device resources and device connections.
• Physical path resource information is calculated based on the device resources and connections.
• Abstract path resource information is then calculated based on the physical path resource information.
• Correlation information between abstract paths is generated.
• The abstract path resource information and correlation information are stored in a resource pool.
• A temporary resource pool is used to temporarily store the abstract path resource information and correlation information.
• The controller determines if a slice meeting a slice request requirement can be generated.
• The temporary resource calculation unit updates information in the temporary resource pool.

Abstract

A controller includes a physical network information acquisition unit obtaining information about resource of a device and information about connection between devices in a wireless access network, a physical path calculation unit calculating physical path resource information based on the information about resource of the device and the information about connection between the devices, an abstract path resource calculation unit calculating abstract path resource information based on the physical path resource information, an abstract path correlation calculation unit generating correlation information between abstract paths, a resource pool storing the abstract path resource information and the correlation information, a temporary resource pool temporarily storing the abstract path resource information and the correlation information, an abstract resource allocation unit determining whether a slice meeting a requirement of a slice request can be generated, and a temporary resource calculation unit updating information in the temporary resource pool.

MOBILE COMMUNICATION SYSTEM, ORIGINATING BASE STATION, CANDIDATE BASE STATION, AND MOBILE TERMINAL (18222347)

Main Inventor

Yasuhiro ONAKA

Brief explanation

The patent application describes a mobile communication system that allows a mobile device to switch its communication partner from one base station to another.

• The system sends a request message from the current base station to multiple potential destination base stations, asking to become a candidate for communication.
• The potential destination base stations respond with a response message to the request.
• The current base station then transmits information about the candidate base stations to the mobile device.
• The purpose of this system is to enable seamless handover of communication between different base stations, improving the overall mobile communication experience.

Abstract

A mobile communication system, which changes a communication partner of a mobile terminal from an originating base station to a destination base station, wherein a request message requesting to become a candidate is transmitted to a plurality of candidate base stations, which are potential destination base stations, from the originating base station, a response message responding to the request message is transmitted from the plurality of candidate base stations to the originating base station, and information of the candidate base stations is transmitted from the originating base station to the mobile terminal.