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公开(公告)号：US12066533B2
公开(公告)日：2024-08-20
申请号：US17834309
申请日：2022-06-07
Inventor： Hiroki Yamashita , Atsushi Seki
IPC: G01S15/931
CPC classification number: G01S15/931
Abstract: An object detection system includes distance measurement sensors and a hardware processor functioning as a wave transmission control circuit and a determination circuit. The distance measurement sensors provided at different positions in a vehicle. The wave transmission control circuit sets one of the distance measurement sensors as a top of a wave transmission order. A detection range of the one of the distance measurement sensors covers a region where an object is located. The object has been detected through preliminary detection when power supply to the vehicle is started. The wave transmission control circuit then repeats a cyclic wave transmission control on the distance measurement sensors to emit ultrasonic waves sequentially in the wave transmission order. The determination circuit determines an object as a detection target object when any one of the distance measurement sensors has detected the object a predetermined number of times.
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公开(公告)号：US12259470B2
公开(公告)日：2025-03-25
申请号：US17703363
申请日：2022-03-24
Inventor： Hiroki Yamashita , Atsushi Seki
IPC: G01S15/931 , G01S13/42 , G01S13/86 , G01S13/931 , G06V20/58
Abstract: An object detection device according to the present disclosure, installed in a vehicle, includes a plurality of ranging sensors and each including a transmitter configured to transmit ultrasonic waves and a receiver configured to receive reflected waves of the ultrasonic waves transmitted by the transmitter and reflected by an object around the vehicle, and processing circuitry configured to detect the object around the vehicle based on the reflected waves received by the receiver during a wave receiving period until a predetermined period of time elapses from transmission of the ultrasonic waves by the transmitter. The processing circuitry is configured to acquire an imaged image imaged by an in-vehicle camera that images surroundings of the vehicle. The processing circuitry is configured to determine whether a specific object is contained based on the imaged image. The processing circuitry is configured to set the wave receiving period from a first wave receiving period to a second wave receiving period longer than the first wave receiving period when the specific object is determined to be contained in the imaged image.
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公开(公告)号：US11770068B2
公开(公告)日：2023-09-26
申请号：US17667324
申请日：2022-02-08
Inventor： Hideki Nakata , Atsushi Seki
CPC classification number: H02M1/4233 , H02M1/0085 , H02M1/36 , H02M7/125 , H02M1/0083 , H02M7/1555 , H02M7/1626
Abstract: In a switching power supply device, a control circuit controls a first thyristor, a second thyristor, and a switching element according to an input voltage. The control circuit maintains the first thyristor in an on state while maintaining the second thyristor and the switching element in an off state in a first period in which the absolute amplitude value is equal to or less than a first threshold value within the latter half of a first half-cycle of the input voltage at startup, and maintains the second thyristor in an on state while maintaining the first thyristor and the switching element in an off state in a second period in which the absolute amplitude value is equal to or less than a second threshold value within the latter half of a second half-cycle of the input voltage at startup. The second half-cycle is the half-cycle following the first half-cycle.
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公开(公告)号：US20230268760A1
公开(公告)日：2023-08-24
申请号：US18164393
申请日：2023-02-03
Inventor： Hiroyuki Hosoi , Atsushi Seki
CPC classification number: H02J7/06 , H02M7/23 , H02M3/33573 , H02M1/0058 , H02J2207/20
Abstract: A charging system includes an AC/DC converter a DC/DC converter, and a control circuit. The AC/DC converter is connected between first/second input nodes and first/second intermediate nodes and is connected to an AC power supply via the first/second input nodes. The DC/DC converter is connected between the first/second intermediate nodes and first/second output nodes and is connectable to a battery via the first/second output nodes. The DC/DC converter includes an isolation transformer, a primary circuit, and a secondary circuit. The primary circuit includes switching elements. The control circuit causes the switching elements to start operation at a first frequency when the AC/DC converter and the DC/DC converter are activated, and causes the switching elements to operate at a second frequency when the AC/DC converter and the DC/DC converter are in steady operation. The first frequency is higher than the second frequency.
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