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公开(公告)号：US20240255637A1
公开(公告)日：2024-08-01
申请号：US18614786
申请日：2024-03-25
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Shinichi SASAKI , Takaaki ASADA , Yuuma WATABE
CPC classification number: G01S15/102 , G01S7/524 , G01S7/5276 , G01S15/101
Abstract: An object detection device includes a transmitter to generate an acoustic wave as a signal wave based on a predetermined transmission signal and transmit the signal wave toward an object, a receiver provided separately from the transmitter and to receive the acoustic wave to generate a reception signal, and a controller to generate the transmission signal to control the signal wave from the transmitter. The receiver has frequency characteristics such that the reception signal fluctuates when the receiver resonates. The transmission signal is set according to the frequency characteristics of the receiver to reduce or prevent a resonance of the receiver at a time of reception of the signal wave from the transmitter.
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公开(公告)号：US20220202650A1
公开(公告)日：2022-06-30
申请号：US17655058
申请日：2022-03-16
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Kosuke HAMADA , Takanori NAKAMURA , Takaaki ASADA , Risa CHIBA
Abstract: A medicine-taking detection system is provided that includes an ingestion device 1 and a detection device that detects taking of the ingestion device. The ingestion device includes a medicine, a signal transmission unit that transmits a first signal, a signal reception unit that receives a reflected signal of the first signal transmitted from the signal transmission unit, and a secondary battery that supplies power to the signal transmission unit and the signal reception unit. The signal transmission unit is configured to, when the signal reception unit receives the reflected signal, transmit a second signal including information on a signal intensity of the reflected signal, and the detection device receives the second signal and detects the taking of the ingestion device based on the information on the signal intensity of the reflected signal.
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公开(公告)号：US20220183929A1
公开(公告)日：2022-06-16
申请号：US17653179
申请日：2022-03-02
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Risa CHIBA , Takanori NAKAMURA , Kosuke HAMADA , Takaaki ASADA
Abstract: A medicine removal detection system is provided that includes a medication device and a storage member in a sheet shape storing the medication device. The medication device includes medicine, a secondary battery, and a signal transmission unit that transmits a signal indicating a state of the secondary battery. The storage member includes the electric current supply line for supplying an electric current to the secondary battery of the medication device, and is configured such that a supply environment of an electric current to the secondary battery changes when the medication device is taken out. The signal transmission unit transmits a signal indicating a state change of the secondary battery based on a change in the supply environment of an electric current to the secondary battery of the storage member.
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公开(公告)号：US20230367007A1
公开(公告)日：2023-11-16
申请号：US18226290
申请日：2023-07-26
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Shinichi SASAKI , Takaaki ASADA
CPC classification number: G01S15/101 , G01S7/527
Abstract: An object detection system includes an acoustic wave generator to generate an acoustic wave by generating heat upon energization and a processing circuit to perform object detection processing to detect an object in target space using an acoustic wave generated by the acoustic wave generator. The object detection processing includes setting processing, wave transmission processing, and determination processing. The setting processing sets a search range corresponding to a distance to the object in the target space. The wave transmission processing controls the acoustic wave generator to generate an acoustic wave at a target sound pressure associated with a search range set in the setting processing. The determination processing acquires, from a wave receiver to receive an acoustic wave from the target space, a received-wave signal representing an acoustic wave received by the wave receiver and determines whether the object is present based on the received-wave signal.
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5.发明申请公开(公告)号：US20200304924A1
公开(公告)日：2020-09-24
申请号：US16886836
申请日：2020-05-29
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Shinichi SASAKI , Takaaki ASADA
IPC: H04R23/00
Abstract: A thermal excitation acoustic-wave-generating device includes a first acoustic wave source that includes a first heating element and a substrate that includes a main surface along which the first heating element is disposed, a second acoustic wave source that includes a second heating element and a facing body that includes a main surface along which the second heating element is disposed, and a pair of electrodes connected to the first and second heating elements. The first and second acoustic wave sources are arranged such that the first and second heating elements are separated from each other and face each other. The pair of electrodes are disposed between the first and second acoustic wave sources.
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Patent Agency Ranking
公开(公告)号：US20240337739A1
公开(公告)日：2024-10-10
申请号：US18749159
申请日：2024-06-20
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Shinichi SASAKI , Takaaki ASADA , Yuuma WATABE
Abstract: An object detector includes a wave transmitter to transmit a modulated wave in a predetermined frequency range to an object, a first wave receiver to receive sound waves and to generate a first wave reception signal indicative of the reception of the sound waves, a second wave receiver to receive sound waves and to generate a second wave reception signal indicative of the reception of the sound waves, an adder to generate a third wave reception signal by adding the first and second wave reception signals, and a controller to detect the object based on the third wave reception signal by causing the wave transmitter to transmit the modulated wave. The second wave receiver is farther from the wave transmitter than the first wave receiver. A fluctuation range of the third wave reception signal is not greater than a fluctuation range of the first wave reception signal.
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公开(公告)号：US20240118415A1
公开(公告)日：2024-04-11
申请号：US18536530
申请日：2023-12-12
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Yuuma WATABE , Takaaki ASADA , Shinichi SASAKI
Abstract: A displacement detection device includes a transmitter, a receiver, and a controller configured or programmed to output a first transmission signal to the transmitter to transmit a modulated wave and acquire a responsive first reception signal in a first measurement period, extract first phase information indicating a phase defined in a correlation between a first transmission signal and a reception signal, output a second transmission signal to the transmitter and acquire a responsive second reception signal in a second measurement period after the first measurement period, extract second phase information indicating a phase defined in a correlation between the second transmission signal and reception signal, and detect a displacement of an object between the first and second measurement periods, depending on a difference between the first and second phase information.
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公开(公告)号：US20240118402A1
公开(公告)日：2024-04-11
申请号：US18537871
申请日：2023-12-13
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Yuuma WATABE , Takaaki ASADA , Shinichi SASAKI
CPC classification number: G01S7/539 , G01S7/52004 , G01S15/10
Abstract: An object detection device includes a wave transmitter to transmit a sound wave to an object, a wave receiver to receive the sound wave and generate a signal representing a reception result, and a controller to control transmission of the sound wave by the wave transmitter and obtain the receive signal from the wave receiver. The controller is configured or programmed to output a transmit signal to cause the wave transmitter to transmit the sound wave and obtain a corresponding receive signal. The controller is configured or programmed to generate detection information about the object by performing complexification on a correlation signal representing a correlation between the transmit signal and the receive signal. A signal corrector is configured or programmed to correct any of the correlation signal, the receive signal, and the transmit signal to mitigate a direct-current component in the correlation signal targeted for the complex analysis.
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公开(公告)号：US20230341546A1
公开(公告)日：2023-10-26
申请号：US18215328
申请日：2023-06-28
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Shinichi SASAKI , Takaaki ASADA
CPC classification number: G01S15/04 , G01S7/526 , G01S7/52004 , G01S2007/52007
Abstract: An object detection system includes a processing circuit to perform wave transmission processing and determination processing. In the wave transmission processing, an acoustic wave generator is controlled to generate a series of acoustic waves of a time-varying frequency at target sound pressures associated with a frequency and correspond to the respective acoustic waves. In the determination processing, a received-wave signal representing an acoustic wave from a target space received by a wave receiver is acquired and it is determined whether an object is present in the target space based on the received-wave signal. Each of the target sound pressures is set based on the frequency characteristics of sensitivity of the wave receiver to an acoustic wave of a predetermined sound pressure, such that the sensitivity of the wave receiver to an acoustic wave of the target sound pressure is in a predetermined range including a predetermined value.
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公开(公告)号：US20230338989A1
公开(公告)日：2023-10-26
申请号：US18215327
申请日：2023-06-28
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Shinichi SASAKI , Takaaki ASADA
IPC: B06B1/02
CPC classification number: B06B1/0215 , B06B2201/40 , B06B2201/51
Abstract: An acoustic-wave generating device includes a drive circuit and a power auxiliary circuit. The drive circuit includes a capacitor chargeable via a direct-current power supply, and a drive switch to cause power to be supplied from the capacitor to an acoustic-wave source which produces heat through energization to generate acoustic waves. The power auxiliary circuit is operable to supplies power to the drive circuit to avoid a decrease of power supplied to the acoustic-wave source in an operation of generating a series of acoustic waves from the acoustic-wave source through switching of the drive switch.
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