Abstract: A power conversion device includes: a first smoothing circuit connected to a first electric device; a second smoothing circuit connected to a second electric device; a first bridge circuit connected to the first smoothing circuit; a transformer having a primary side connected to a third electric device and a secondary side connected to the first bridge circuit and the second smoothing circuit; and a controller, wherein the controller varies a duty ratio of the first bridge circuit at a frequency higher than cutoff frequencies of the first and second smoothing circuits, controls a constant component of the duty ratio to control power exchange between the first and second electric devices, and controls a phase of a varying component of the duty ratio to control power exchange to and from the third electric device.

Abstract: The bird's-eye view image system is provided with a plurality of cameras for acquiring a surrounding image of the work vehicle, a display unit for displaying a bird's-eye view image based on the image acquired by the plurality of cameras, and a control unit for causing a bird's-eye view image to be generated and displayed by the display unit. The plurality of cameras have a first front camera provided in the traveling body for acquiring an image ahead of the travelling body, a first rear camera provided in the traveling body for acquiring an image backward of the traveling body, a right camera provided on the swivel base for acquiring an image rightward of the swivel base, and a left camera provided on the swivel base for acquiring an image leftward of the swivel base.

Abstract: In a storage battery system charging control device, on the basis of estimated temperature data until the end of life of a storage battery calculated by a power estimation unit, an ambient temperature estimation unit, and a temperature estimation unit, and a deterioration coefficient stored in a data storage unit, a capacity retention calculation unit sequentially calculates capacity retention data with respect to each state of charge until the end of life of the storage battery, using the state of charge as a parameter. A cumulative capacity calculation unit calculates a cumulative capacity corresponding to each state of charge, on the basis of the rated capacity of the storage battery and the capacity retention data. A charging control voltage determination unit determines charging control voltage on the basis of the cumulative capacities calculated by the cumulative capacity calculation unit.

Abstract: A power conversion device includes: a first smoothing circuit connected to a first electric device; a second smoothing circuit connected to a second electric device; a first bridge circuit connected to the first smoothing circuit; a transformer having a primary side connected to a third electric device and a secondary side connected to the first bridge circuit and the second smoothing circuit; and a controller, wherein the controller varies a duty ratio of the first bridge circuit at a frequency higher than cutoff frequencies of the first and second smoothing circuits, controls a constant component of the duty ratio to control power exchange between the first and second electric devices, and controls a phase of a varying component of the duty ratio to control power exchange to and from the third electric device.

Abstract: The positive electrode of the unit in an m-th configuration stage (m is an integer satisfying 2?m?n) is connected to a negative electrode of the unit in an (m?1)-th configuration stage. A drain-side terminal of the step-up switch included in the m-th configuration stage is connected to a source-side terminal of the step-up switch included in the (m?1)-th configuration stage. A source-side terminal of the step-up switch included in an n-th configuration stage is connected to a negative electrode of the unit included in the n-th configuration stage. The n step-up switches connected in series are connected in parallel to a series circuit including the power storage mechanism and the reactor.

Abstract: A voltage sensor includes a vibrator configured to be supported by a mechanical supporting portion and to be given a floating potential, a drive electrode configured to be disposed adjacent to the vibrator and to resonate the vibrator with applied AC voltage, a driver configured to apply an AC voltage that crosses 0 V to the drive electrode, a fixed electrode configured to be disposed adjacent to the vibrator with a gap formed between the fixed electrode and the vibrator, and a calculator configured to detect a magnitude of a measurement target voltage based on a change of a resonant frequency of the vibrator when the measurement target voltage is applied to the fixed electrode.

Abstract: A voltage sensor includes an oscillator that has a circular or roughly circular shape and is supported by a mechanical support member, a fixed electrode that has a predetermined gap between the oscillator and the fixed electrode, and a drive electrode that is placed at a position different from the fixed electrode across the oscillator, and to which an AC drive voltage is applied to make the oscillator oscillate. In the voltage sensor, an electrostatic attractive force acts on the oscillator by applying a voltage to the fixed electrode, and a resonance frequency of the oscillator changes.

Abstract: The bird's-eye view image system is provided with a plurality of cameras for acquiring a surrounding image of the work vehicle, a display unit for displaying a bird's-eye view image based on the image acquired by the plurality of cameras, and a control unit for causing a bird's-eye view image to be generated and displayed by the display unit. The plurality of cameras have a first front camera provided in the traveling body for acquiring an image ahead of the travelling body, a first rear camera provided in the traveling body for acquiring an image backward of the traveling body, a right camera provided on the swivel base for acquiring an image rightward of the swivel base, and a left camera provided on the swivel base for acquiring an image leftward of the swivel base.

Abstract: A sheet correcting device includes a plurality of curved surface members including curved surfaces, respectively, to deform a sheet along the curved surfaces, the plurality of curved surface members disposed along a conveyance direction of the sheet, a plurality of pressing members disposed facing the curved surfaces of the plurality of curved surface members, respectively, to press the sheet against the curved surfaces of the plurality of curved surface members, respectively, a sheet tensioner to apply tension to the sheet, and a heater to heat the sheet that is bent by the curved surfaces of the plurality of curved surface members.

Abstract: A sheet correcting device includes a belt pair to sandwich a sheet with an upper belt and a lower belt to convey the sheet in a sheet conveyance direction, a plurality of curved surface members disposed along the sheet conveyance direction, each of the plurality of curved surface members comprising a curved surface to contact the belt pair where the belt pair sandwiches the sheet, a plurality of pressing members facing the curved surface of each of the plurality of curved surface members, respectively, to press the belt pair against the curved surface of each of the plurality of curved surface members, and a heater to heat the sheet via at least one of the upper belt and the lower belt of the belt pair.

Abstract: Semiconductor devices each include: a semiconductor substrate that contains beta-gallium oxide and has a first conductivity type; a first semiconductor region that contains beta-gallium oxide, has the first conductivity type, and is provided on an upper side of the semiconductor substrate; a second semiconductor region that contains beta-gallium oxide, has a second conductivity type, and is provided on an upper side of a part of the first semiconductor region; and a third semiconductor region that contains beta-gallium oxide, has the first conductivity type, and is provided on an upper side of a part of the second semiconductor region. When the first conductivity type is an n-type and the second conductivity type is a p-type, the second semiconductor region further contains a band gap control element. The band gap control element is selected from a group of boron, aluminum, and indium.

Abstract: The present invention makes it possible to prevent an optical loss in association with mode field diameter conversion and to prevent deformation in a mode field converter. The present invention includes: (a) temporarily fixing an end surface of an optical fiber (1) to an end surface of a core part (8) via a highly-viscous resin (3); and (b) after the step (a), while butting the end surface of the optical fiber (1) against the end surface of the core part (8) through the highly-viscous resin (3), fixing the optical fiber (1) to a semiconductor optical device (100) at a place away from the end surface of the optical fiber (1).

Abstract: A voltage sensor includes a vibrator configured to be supported by a mechanical supporting portion and to be given a floating potential, a drive electrode configured to be disposed adjacent to the vibrator and to resonate the vibrator with applied AC voltage, a driver configured to apply an AC voltage that crosses 0 V to the drive electrode, a fixed electrode configured to be disposed adjacent to the vibrator with a gap formed between the fixed electrode and the vibrator, and a calculator configured to detect a magnitude of a measurement target voltage based on a change of a resonant frequency of the vibrator when the measurement target voltage is applied to the fixed electrode.

Abstract: An optical modulation device configured of a planar optical waveguide, includes: a light incidence unit which allows light to be incident on the planar optical waveguide; a Mach-Zehnder interferometer which includes a first optical splitter section branching the light incident on the light incidence unit, two arm portions guiding the light branched by the first optical splitter section, a phase modulation unit linearly disposed on each of the two arm portions, and a first optical coupler section combining the light guided from the two arm portions; a light launching unit which launches the light combined by the first optical coupler section from the planar optical waveguide; and a traveling-wave electrode which includes an input unit and an output unit, and applies a voltage to the phase modulation unit.

Abstract: A voltage sensor includes an oscillator that has a circular or roughly circular shape and is supported by a mechanical support member, a fixed electrode that has a predetermined gap between the oscillator and the fixed electrode, and a drive electrode that is placed at a position different from the fixed electrode across the oscillator, and to which an AC drive voltage is applied to make the oscillator oscillate. In the voltage sensor, an electrostatic attractive force acts on the oscillator by applying a voltage to the fixed electrode, and a resonance frequency of the oscillator changes.

Abstract: The present invention makes it possible to prevent an optical loss in association with mode field diameter conversion and to prevent deformation in a mode field converter. The present invention includes: (a) temporarily fixing an end surface of an optical fiber (1) to an end surface of a core part (8) via a highly-viscous resin (3); and (b) after the step (a), while butting the end surface of the optical fiber (1) against the end surface of the core part (8) through the highly-viscous resin (3), fixing the optical fiber (1) to a semiconductor optical device (100) at a place away from the end surface of the optical fiber (1).

Abstract: A bracket is used in a support structure for a steering column. The support structure includes an instrument panel reinforcement, a steering support bracket, and a floor brace. In one aspect, the bracket includes a first portion and a second portion, which are configured to be arranged spanning between the steering support bracket and the floor brace. The first portion is arranged between the steering support bracket and the floor brace at a first angle with respect to horizontality. The second portion is arranged between the steering support bracket and the floor brace at a second angle, which is different from the first angle.

Abstract: A bracket is used in a support structure for a steering column. The support structure includes an instrument panel reinforcement, a steering support bracket, and a floor brace. In one aspect, the bracket includes a first portion and a second portion, which are configured to be arranged spanning between the steering support bracket and the floor brace. The first portion is arranged between the steering support bracket and the floor brace at a first angle with respect to horizontality. The second portion is arranged between the steering support bracket and the floor brace at a second angle, which is different from the first angle.

Abstract: An optical modulation device configured of a planar optical waveguide, includes: a light incidence unit which allows light to be incident on the planar optical waveguide; a Mach-Zehnder interferometer which includes a first optical splitter section branching the light incident on the light incidence unit, two arm portions guiding the light branched by the first optical splitter section, a phase modulation unit linearly disposed on each of the two arm portions, and a first optical coupler section combining the light guided from the two arm portions; a light launching unit which launches the light combined by the first optical coupler section from the planar optical waveguide; and a traveling-wave electrode which includes an input unit and an output unit, and applies a voltage to the phase modulation unit.

Abstract: A pair of reinforcing ribs (50, 50) are formed on the bottom plate (33) of a box body (31) of an electrical component box (30). The reinforcing ribs (50, 50) have their respective pivot guides (50a, 50a) provided at their front ends to engage with associated pins (38b, 38b) on the safety cover (38). The safety cover (38) is pivotally supported to the pivot guides (50a, 50a) of the reinforcing ribs (50, 50) to allow it to open and close the opening of the box body (31).