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公开(公告)号：US11237265B2
公开(公告)日：2022-02-01
申请号：US16867421
申请日：2020-05-05
Applicant: DENSO CORPORATION
Inventor： Tetsuya Aoyama , Yu Koyama , Satoru Noro
IPC: G01S15/04 , G01S15/931 , G08G1/16 , H04B11/00
Abstract: A transmission/reception control device is configured to control transmission and reception in an ultrasonic sensor. The ultrasonic sensor includes an ultrasonic transducer. The ultrasonic transducer is configured to transmit a probe wave as an ultrasonic wave and receive a reception wave. The reception wave includes a reflected wave of the probe wave. The transmission/reception control device includes a transmission frequency setting unit, a reception signal processing unit, and an object detection unit. The transmission frequency setting unit sets a frequency of the probe wave to a transmission frequency different from a resonance frequency of the ultrasonic transducer. The reception signal processing unit processes a reception result of the reception wave based on the probe wave transmitted with the transmission frequency. The object detection unit detects the object based on a result of processing by the reception signal processing unit.
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公开(公告)号：US10852430B2
公开(公告)日：2020-12-01
申请号：US16659820
申请日：2019-10-22
Applicant: DENSO CORPORATION
Inventor： Tetsuya Aoyama , Yu Koyama , Dai Kondo
Abstract: An object detection device includes: a transceiver section that transmits an ultrasonic wave and receives an ultrasonic wave including a reflected wave of the transmitted ultrasonic wave, and outputs a signal in accordance with a wavelength of the received ultrasonic wave; a frequency control section that changes a frequency of the ultrasonic wave transmitted by the transceiver section to a plurality of frequencies different from a driving frequency used to detect the distance from the object; and a fault determination section that determines whether a fault occurs in the function of detecting the distance from the object due to a value of an environment temperature or a wavelength of the ultrasonic wave transmitted by the transceiver section, based on a value of the signal outputted from the transceiver section when the transceiver section transmits the ultrasonic wave at a selected one of the frequencies different from the driving frequency.
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公开(公告)号：US12253598B2
公开(公告)日：2025-03-18
申请号：US18450248
申请日：2023-08-15
Applicant: DENSO CORPORATION
Inventor： Yu Koyama , Tetsuya Aoyama
IPC: G01S15/931 , G01S7/534
Abstract: An object detection device includes a drive signal generator that generates a drive signal including frequency modulation, a first correlation filter that performs correlation detection between the reception signal and a first reference signal corresponding to the drive signal, a first determiner that determines, based on the correlation signal from the first correlation filter, whether the reception signal is a reflected wave of the probe wave transmitted from the transmitter, a second correlation filter that performs correlation detection between the reception signal and a second reference signal corresponding to a portion of the drive signal, a third correlation filter that performs correlation detection between the reception signal and a third reference signal corresponding to another portion of the drive signal having higher frequencies than the second reference signal, and a second determiner that determines whether there is an object within a detection region based on correlation signals from the second and third correlation filters.
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公开(公告)号：US12061258B2
公开(公告)日：2024-08-13
申请号：US17349603
申请日：2021-06-16
Applicant: DENSO CORPORATION
Inventor： Yohei Suzuki , Yu Koyama , Mitsuyasu Matsuura , Satoru Noro , Tetsuya Aoyama , Hideki Otsuka
IPC: G01S15/931 , G01S7/523 , G01S15/10
CPC classification number: G01S15/931 , G01S7/523 , G01S15/104
Abstract: An object detecting apparatus is configured to detect a surrounding object. The object detecting apparatus is provided with a driving signal generation unit provided to generate a driving signal that drives a transmitter unit including a transmitter emitting transmission waves externally; and a control unit provided to control an output of the driving signal transmitted to the transmitter unit from the driving signal generation unit. The driving signal generation unit is configured to generate the driving signal of which the frequency changes stepwise.
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公开(公告)号：US11977153B2
公开(公告)日：2024-05-07
申请号：US17807305
申请日：2022-06-16
Applicant: DENSO CORPORATION
Inventor： Yu Koyama , Satoru Noro , Tetsuya Aoyama
IPC: G01S15/931 , G01S7/52
CPC classification number: G01S15/931 , G01S7/52004
Abstract: An object detection apparatus detects an object in a vicinity of a moving body in a state of being mounted to the moving body. The object detection apparatus measures a reverberation frequency that is a frequency of a reverberation signal that is generated in a transceiver that externally transmits a transmission wave that is an ultrasonic wave and receives a reception wave that includes a reflected wave of the transmission wave from the object. The object detection apparatus detects a specific segment that is an occurrence segment in which occurrence of beat that is attributed to a plurality of reverberation frequency components is confirmed in the reverberation signal, or a non-occurrence segment in which the occurrence of beat does not significantly occur. The object detection apparatus sets a measurement segment in which the reverberation frequency is measured in the non-occurrence segment based on a detection result of the specific segment.
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Patent Agency Ranking
公开(公告)号：US11555922B2
公开(公告)日：2023-01-17
申请号：US16829473
申请日：2020-03-25
Applicant: DENSO CORPORATION
Inventor： Yohei Suzuki , Taketo Harada , Mitsuyasu Matsuura , Tetsuya Aoyama
Abstract: An object detection device comprises a transmission sound pressure adjustment unit adjusting a sound pressure of the search wave so that the sound pressure of the search wave or a reflected wave based on the search wave is within a predetermined transmission target range. The transmission unit transmits, as the search wave, a first search wave with a first frequency changing with time at a first rate and a second search wave with a second frequency changing with time at a second rate that is different from the first rate. The transmission sound pressure adjustment unit is configured to adjust the sound pressure of each of the first and second search waves so that the sound pressure of the corresponding one of the first and second search waves or the reflected wave based on the corresponding one of the first and second search waves is within the transmission target range.
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公开(公告)号：US11816009B2
公开(公告)日：2023-11-14
申请号：US17350357
申请日：2021-06-17
Applicant: DENSO CORPORATION
Inventor： Tetsuya Aoyama , Masakazu Takeichi
IPC: G06F11/30 , H04B1/16 , H04L67/12 , B60R16/023
CPC classification number: G06F11/3051 , B60R16/023 , G06F11/3006 , G06F11/3027 , H04B1/1615 , H04L67/12
Abstract: A communication system includes a primary apparatus and a plurality of secondary apparatuses connected in a daisy chain to the primary apparatus. In each of the secondary apparatuses, a detecting unit detects a current. In response to a switching unit being in an on state, the switching unit allows a current from a primary apparatus to be applied to a detecting unit of at least one other secondary apparatus that is positioned further toward the primary apparatus side than own secondary apparatus is. In response to the switching unit being in an off state, the switching unit allows the current from the primary apparatus not to be applied to the detecting unit of the at least one other secondary apparatus and the detecting unit of the own secondary apparatus. A secondary control unit sets an ID of the secondary apparatus based on a detection result of the detecting unit.
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公开(公告)号：US12174294B2
公开(公告)日：2024-12-24
申请号：US17349608
申请日：2021-06-16
Applicant: DENSO CORPORATION
Inventor： Yu Koyama , Mitsuyasu Matsuura , Satoru Noro , Tetsuya Aoyama
IPC: G01S15/10 , G01S7/52 , G01S15/931
Abstract: An apparatus includes a drive signal generator that selectively outputs, as a drive signal, one of a first drive signal and a second drive signal. The first drive signal has a first temporal frequency change within a first frequency band that is defined from a first lowest frequency to a first highest frequency inclusive. The second drive signal has a second temporal frequency change within a second frequency band that is defined from a second lowest frequency to a second highest frequency inclusive. Each of the first and second frequency bands has a corresponding one of first and second intermediate frequencies that is defined as one of a center frequency and an average frequency of the corresponding one of the first and second frequency bands. The second intermediate frequency is different from the first intermediate frequency. The second frequency band is partially overlapped with the first frequency band.
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公开(公告)号：US11977151B2
公开(公告)日：2024-05-07
申请号：US17807492
申请日：2022-06-17
Applicant: DENSO CORPORATION
Inventor： Yu Koyama , Tetsuya Aoyama
CPC classification number: G01S15/104 , G01S7/52004 , G01S7/524
Abstract: An object detection apparatus detects an object in a vicinity of a moving body in a state of being mounted to the moving body. The object detection apparatus measures a reverberation frequency that is a frequency of a reverberation signal that is generated in a transceiver that externally transmits a transmission wave that is an ultrasonic wave and receives a reception wave that includes a reflected wave of the transmission wave from the object. object detection apparatus detects the object based on the reception wave. The object detection apparatus sets at least one of a transmission characteristic and a reception characteristic in the transceiver. The object detection apparatus sets at least one of transmission characteristics of the transmission wave and/or sets circuit characteristics in the transceiver. The object detection apparatus reduces at least one of the transmission characteristic and the reception characteristic during measurement of the reverberation frequency.
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公开(公告)号：US11754709B2
公开(公告)日：2023-09-12
申请号：US17220423
申请日：2021-04-01
Applicant: DENSO CORPORATION
Inventor： Yu Koyama , Mitsuyasu Matsuura , Satoru Noro , Hideki Otsuka , Tetsuya Aoyama
IPC: G01S15/88 , G01S15/931 , G01S7/524 , G01S7/526
CPC classification number: G01S15/931 , G01S7/524 , G01S7/526
Abstract: An object detection device includes a signal generator configured to generate a drive signal including an identification signal for identifying ultrasonic waves, a transmitter configured to transmit an ultrasonic wave as a probe wave in response to the drive signal, a receiver configured to receive the ultrasonic wave to generate a reception signal, and a determiner configured to analyze frequencies of the reception signal to determine whether the received wave is a reflected wave of the probe wave, thereby detecting an object. The drive signal includes a ramp-up signal generated to be followed by the identification signal and is used to ramp up an amplitude of the probe wave. A frequency of the ramp-up signal is set to include a frequency at which a transmission/reception efficiency is higher than a transmission/reception efficiency at each of a maximum frequency of the identification signal and a minimum frequency of the identification signal.
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