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公开(公告)号：US20220113404A1
公开(公告)日：2022-04-14
申请号：US17645570
申请日：2021-12-22
Applicant: DENSO CORPORATION
Inventor： Yu KOYAMA , Mitsuyasu MATSUURA , Satoru NORO , Tetsuya AOYAMA
IPC: G01S15/52
Abstract: An object detection apparatus detects an object in a vicinity of a moving body to which it is mounted. In the object detection apparatus, first drive signal and second drive signals for driving a transmitting unit are generated and outputted to the transmitting unit. The first drive signal corresponds to a first transmission wave included in a plurality of transmission waves that are continuously transmitted from a start to an end of a transmission process of the transmission wave, and respectively encoded based on waveform patterns. The second drive signal corresponds to a second transmission wave included in the plurality of transmission waves and transmitted after the first transmission wave. Reception determination regarding the reflected wave is performed based on a frequency signal, corresponding to a waveform pattern of the reception signal, and a reference signal that corresponds to a waveform pattern of the first drive signal.
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公开(公告)号：US20210311185A1
公开(公告)日：2021-10-07
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 , G01S15/931 , G01S7/52
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：US20210223394A1
公开(公告)日：2021-07-22
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: G01S15/931 , 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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公开(公告)号：US20190317202A1
公开(公告)日：2019-10-17
申请号：US16306977
申请日：2017-05-29
Applicant: DENSO CORPORATION
Inventor： Mitsuyasu MATSUURA , Taketo HARADA , Tetsuya AOYAMA , Yu KOYAMA , Takuya NOMURA
Abstract: An ultrasonic sensor, that transmits probe waves which are ultrasonic waves and acquires detection waves including reflected waves which have been reflected from surrounding objects, includes a transmitter/receiver that transmits the probe waves and acquires the detection waves, a detection wave processing section that executes processing for passing a predetermined frequency band which includes the frequency of the probe waves, an amplitude measurement section which measures the amplitude of the detection waves, and a judgement section which judges whether there is adherence of foreign matter on the transmitter/receiver, based on a relationship between a time axis and values of the amplitude of the detection waves during a reverberation interval following the termination of transmitting the probe waves.
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公开(公告)号：US20250164625A1
公开(公告)日：2025-05-22
申请号：US19035418
申请日：2025-01-23
Applicant: DENSO CORPORATION
Inventor： Shogo NAKAMURA , Yu KOYAMA , Tetsuya AOYAMA
IPC: G01S7/524 , G01S15/58 , G01S15/931
Abstract: An object detection device has a transmitter that transmits a long pulse signal, in which a pulse width is longer than a predetermined time, as a transmission wave, the transmission wave being an ultrasonic wave; a receiver that obtains a received signal corresponding to a reflected wave reflected by an object of the transmission wave; a signal processor that obtains a fluctuation signal based on the received signal and detects the object based on the fluctuation signal, wherein the fluctuation signal is a signal corresponding to a composite wave generated when receiving the reflected wave and a wave which frequency is different from the reflected wave, or a signal generated by a phase change of the reflected wave when the distance to the object changes.
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Patent Agency Ranking
公开(公告)号：US20230243945A1
公开(公告)日：2023-08-03
申请号：US18004642
申请日：2021-06-25
Applicant: DENSO CORPORATION
Inventor： Syoya ISHIDA , Yu KOYAMA , Tetsuya AOYAMA
CPC classification number: G01S7/52006 , G01S7/534 , G01S2007/52009
Abstract: An object detection device includes a transceiver configured to transmit/receive an ultrasonic wave; a drive signal generation unit configured to generate a drive signal for driving the transceiver; a transmitter circuit configured to cause the transceiver to transmit a probe wave, which is an ultrasonic wave, by driving the transceiver based on the drive signal; and a receiver circuit configured to generate a reception signal corresponding to a reception result of the ultrasonic wave of the transceiver, wherein the drive signal generation unit is configured to generate the drive signal so that frequency of the probe wave changes over time. The device further includes: a voltage measurement unit configured to measure a voltage signal generated in the transceiver while the transceiver transmits the probe wave with frequency changing over time; and a state determination unit configured to make a state determination regarding the transceiver based on the voltage signal.
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公开(公告)号：US20230204765A1
公开(公告)日：2023-06-29
申请号：US18173476
申请日：2023-02-23
Applicant: DENSO CORPORATION
Inventor： Takafumi NISHI , Yu KOYAMA , Tetsuya AOYAMA
IPC: G01S15/04 , G01S15/931 , G01S7/536
CPC classification number: G01S15/04 , G01S7/536 , G01S15/931
Abstract: An object detection device includes: a transceiver having a predetermined resonance frequency; a driving signal generation unit generating a driving signal having a driving frequency different from the resonance frequency for driving the transceiver; a filter extracting and outputting at least one received signal from received signals of the transceiver; and a detection determination unit performing object detection determination based on the extracted at least one received signal. The received signals include a first and second received signals, the first received signal having a frequency that has been shifted from the driving frequency to the resonance frequency; and the filter has a characteristic that: when extracting the first received signal, outputs the extracted first received signal as a first output signal, and when extracting the second received signal, outputs the extracted second received signal as a second output signal, the first output signal being greater than the second output signal.
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公开(公告)号：US20230013319A1
公开(公告)日：2023-01-19
申请号：US17936515
申请日：2022-09-29
Applicant: DENSO CORPORATION
Inventor： Takafumi NISHI , Masayoshi SATAKE , Yu KOYAMA , Masayoshi OOISHI , Masaya TAKATSUJI
IPC: G01S15/931
Abstract: An object detection device that detects a corner of an object includes: a transmitter that transmits a search wave; receivers that receive a reflected wave reflected off the corner. The device determines a first path length of the search wave from the transmitter to a first receiver, and uses the positions of the transmitter and the first receiver as focal points to find a first ellipse whose distances from the transmitter and the first receiver add up to the first path length. The device determines a second path length of the search wave from the transmitter to a second receiver, and uses the positions of the transmitter and the second receiver as focal points to find a second ellipse whose distances from the transmitter and the second receiver add up to the second path length. The device finds an intersection point between the first and second ellipses as the corner.
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公开(公告)号：US20220003856A1
公开(公告)日：2022-01-06
申请号：US17477268
申请日：2021-09-16
Applicant: DENSO CORPORATION
Inventor： Mitsuyasu MATSUURA , Taketo HARADA , Tetsuya AOYAMA , Yu KOYAMA , Takuya NOMURA
Abstract: An ultrasonic sensor (10), that transmits probe waves which are ultrasonic waves and acquires detection waves including reflected waves which have been reflected from surrounding objects, includes a transmitter/receiver (12) that transmits the probe waves and acquires the detection waves, a detection wave processing section (13) that executes processing for passing a predetermined frequency band which includes the frequency of the probe waves, an amplitude measurement section (14) which measures the amplitude of the detection waves, and a judgement section (17) which judges whether there is adherence of foreign matter on the transmitter/receiver, based on a relationship between a time axis and values of the amplitude of the detection waves during a reverberation interval following the termination of transmitting the probe waves.
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公开(公告)号：US20210263149A1
公开(公告)日：2021-08-26
申请号：US17315091
申请日：2021-05-07
Applicant: DENSO CORPORATION
Inventor： Yu KOYAMA , Mitsuyasu MATSUURA , Takuya NOMURA
Abstract: An object detection device includes a drive signal generation unit provided to generate a drive signal for driving a transmitter configured to transmit a search wave to the outside, and a control unit provided to control output of the drive signal from the drive signal generation unit to the transmitter. The drive signal generation unit generates a first drive signal corresponding to a first search wave and a second drive signal corresponding to a second search wave having an encoding scheme that is different from the encoding scheme of the first search wave. The control unit causes the drive signal generation unit to output the first drive signal and the second drive signal to the transmitter at different timings so that one of the first and second search waves is transmitted in a transmission interval between transmissions of the other search wave.
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