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公开(公告)号：US20180003808A1
公开(公告)日：2018-01-04
申请号：US15541527
申请日：2015-12-04
Applicant: Rohm Co., Ltd.
Inventor： Isao Niwa
CPC classification number: G01S7/524 , G01S15/88 , G01S15/93 , H02M2001/0035
Abstract: An ultrasonic sensor 1000 has a transmission/reception processing circuit 100, and the transmission/reception processing circuit 100 has a burst signal transmission circuit 1 that generates and transmits burst signals S0, and a signal processing circuit 7 that processes reception signals received by a piezoelectric element 4. The signal processing circuit 7 verifies the reverberation frequency of the reverberation signals of ultrasonic signals (reception signals) reflected to the piezoelectric element 4 from a subject, and on the basis of the verified reverberation frequency and reverberation time of the reception signals, adjusts the frequency of the burst signals S0 to be substantially equal to the reverberation frequency, said burst signals being to be generated by the burst signal transmission circuit 1.
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Patent Agency Ranking
公开(公告)号：US10852404B2
公开(公告)日：2020-12-01
申请号：US15541527
申请日：2015-12-04
Applicant: Rohm Co., Ltd.
Inventor： Isao Niwa
Abstract: An ultrasonic sensor 1000 has a transmission/reception processing circuit 100, and the transmission/reception processing circuit 100 has a burst signal transmission circuit 1 that generates and transmits burst signals S0, and a signal processing circuit 7 that processes reception signals received by a piezoelectric element 4. The signal processing circuit 7 verifies the reverberation frequency of the reverberation signals of ultrasonic signals (reception signals) reflected to the piezoelectric element 4 from a subject, and on the basis of the verified reverberation frequency and reverberation time of the reception signals, adjusts the frequency of the burst signals S0 to be substantially equal to the reverberation frequency, said burst signals being to be generated by the burst signal transmission circuit 1.
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公开(公告)号：US10782169B2
公开(公告)日：2020-09-22
申请号：US16123036
申请日：2018-09-06
Applicant: Rohm Co., Ltd.
Inventor： Isao Niwa
Abstract: An ultrasonic flowmeter has oscillators 1, 2, a transmitter 31 for transmitting burst waves BURST, amplifiers 34, 35 for amplifying a received signal, a first comparator 36 for checking whether the crest of the amplified signal falls within a predetermined range, a second comparator 37 for checking whether the amplified signal exceeds a predetermined threshold, a third comparator 38 for detecting zero-cross points in the amplified signal, and a controller 40 including a time counter for measuring the propagation time from when the burst waves are transmitted until when the amplified signal reaches a zero-cross point. The time counter has a low-speed clock, a mid-speed clock whose frequency is calibrated with the low-speed clock and whose propagation time is shorter than that of the low-speed clock, and a high-speed clock whose frequency is calibrated with the mid-speed clock and whose propagation time is shorter than that of the mid-speed clock.
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公开(公告)号：US10374143B2
公开(公告)日：2019-08-06
申请号：US15691993
申请日：2017-08-31
Applicant: Rohm Co., Ltd.
Inventor： Akihiro Ota , Yuzo Mizushima , Yuji Kaneda , Isao Niwa
Abstract: A semiconductor integrated circuit constituting a part of a sensor signal processing apparatus for processing sensor signal output from a sensor includes: a first terminal where one end of a vibrator externally attached to the semiconductor integrated circuit is connected and a second terminal where the other end of the vibrator is connected; and an oscillation circuit oscillating the vibrator connected via the first and second terminals, wherein the oscillator circuit intermittently oscillating the vibrator based on control signal, wherein a first period where the oscillation circuit oscillates the vibrator and a second period where the oscillation circuit does not oscillate the vibrator are alternately switched, wherein, during the first period, potentials of the first and second terminals are alternately switched complementarily to high level and low level, and wherein, during the second period, the potentials of the first terminal and the second terminal are fixed to the low level.
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15.发明申请公开(公告)号：US20180024195A1
公开(公告)日：2018-01-25
申请号：US15648574
申请日：2017-07-13
Applicant: Rohm Co., Ltd.
Inventor： Shogo Takamura , Isao Niwa , Yuji Kaneda , Yuzo Mizushima
IPC: G01R31/327
CPC classification number: G01R31/327 , G01R31/007 , G01R31/3277 , H01H9/167
Abstract: A semiconductor integrated circuit for monitoring a switch, including: a first detection part that detects a state of a first switch; a second detection part that detects a state of a second switch; a sub-voltage monitoring part that monitors whether the sub-voltage is within a predetermined range; a switch monitoring part that monitors a change in a state of the first switch and a change in a state of the second switch; a setting part that determines an invalid period, during which the monitoring result of the switch monitoring part regarding the change in the state of the second switch is invalidated; and a transmission part that transmits the monitoring result of the switch monitoring part and information on the invalid period.
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16.发明申请公开(公告)号：US20140043940A1
公开(公告)日：2014-02-13
申请号：US13962472
申请日：2013-08-08
Applicant: Rohm Co., Ltd.
Inventor： Isao Niwa
IPC: G10K11/18
CPC classification number: G10K11/18 , B06B1/0215 , B06B2201/30 , G01S7/524 , G01S15/87 , G01S15/931
Abstract: A transmission circuit transmits an ultrasonic signal from an ultrasonic vibrator by driving a terminal voltage of the ultrasonic vibrator using a first pulse signal and then further driving the terminal voltage using a second pulse signal having an opposite phase to the first pulse signal. At least one of a pulse number of the second pulse signal and a pulse level of the terminal voltage is arbitrarily set.
Abstract translation: 传输电路使用第一脉冲信号驱动超声波振动器的端电压，然后使用与第一脉冲信号具有相反相位的第二脉冲信号进一步驱动终端电压，从超声波振动器发送超声信号。 第二脉冲信号的脉冲数和终端电压的脉冲电平中的至少一个被任意设定。
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