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公开(公告)号：US10349858B2
公开(公告)日：2019-07-16
申请号：US15560756
申请日：2016-03-17
发明人： Yasushi Sato
IPC分类号： A61B5/00 , A61B5/0456 , A61B5/024 , A61B5/0245 , A61B5/021 , A61B5/0205 , A61B5/0452 , A61B5/18
摘要： The difference between the current value and the last value of an RR interval is compared with a predetermined reference differential value, and an attenuation time constant of a peak-hold section is controlled according to the comparison result.
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公开(公告)号：US10058304B2
公开(公告)日：2018-08-28
申请号：US15560729
申请日：2016-03-17
发明人： Yasushi Sato
CPC分类号： A61B8/4416 , A61B5/053 , A61B5/6893 , A61B5/7257 , A61B8/02 , A61B8/488 , A61B8/5269 , A61B2503/08
摘要： A biological signal detection device including a first FFT transformer that performs fast Fourier transformation on a signal of a first sensor, and that outputs a complex data row formed by a first real part data row and a first imaginary part data row; a second FFT transformer that performs fast Fourier transformation on a signal of a second sensor, and that outputs a complex data row formed by a second real part data row and a second imaginary part data row; a frequency component subtractor that subtracts the first real part data row from the second real part data row to output a noise-removed first real part data row; and a FFT inverse transformer that performs fast Fourier inverse transformation on the noise-removed first real part data row and the second imaginary part data row.
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公开(公告)号：US20180014789A1
公开(公告)日：2018-01-18
申请号：US15715991
申请日：2017-09-26
发明人： Yasushi Sato
CPC分类号： A61B5/7203 , A61B5/024 , A61B5/0402 , A61B5/0452 , A61B5/7235 , A61B5/725 , A61B7/04
摘要： Provided is a heart sound denoising apparatus that includes: a heart sound signal acquisition unit that acquires a heart sound signal collected by a sound collector; a pulsation signal acquisition unit that acquires a pulsation signal of a living body; a peak interval acquisition unit that acquires a peak interval of the acquired pulsation signal; a first resampling unit that resamples the heart sound signal corresponding to the acquired peak interval, to a predetermined number of samples, with respect to the heart sound signal detected at a same time as the acquired pulsation signal; a noise removal unit that removes a noise component from the resampled heart sound signal; and a second resampling unit that resamples the heart sound signal resampled by the first resampling unit and with the noise removed, to a number of samples of the peak interval.
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公开(公告)号：US20160088418A1
公开(公告)日：2016-03-24
申请号：US14959797
申请日：2015-12-04
发明人： Yasushi Sato
CPC分类号： H04S7/305 , G10K11/346 , H04R3/12 , H04R2217/03 , H04S2420/03
摘要： A signal control apparatus comprises: a first delay unit that receives a modulated signal corresponding to a positive input signal component; a second delay unit that receives a modulated signal corresponding to a negative input signal component; transducers that receive signals from the delay units and that output, as ultrasonic waves, the received signals; a microphone that detects the ultrasonic waves outputted from the transducers; a waveform characteristic detection unit that integrates the detected ultrasonic waves, thereby detecting the waveform characteristics of the positive sonic wave and of the negative sonic wave; and a delay adjustment unit that inputs, based on the detected waveform characteristics, to the first delay unit or second delay unit, the information of a delay amount being in accordance with a phase difference between the signal outputted from the first delay unit and the signal outputted from the second delay unit to reduce the phase difference.
摘要翻译： 信号控制装置包括：第一延迟单元，其接收对应于正输入信号分量的调制信号; 第二延迟单元，其接收对应于负输入信号分量的调制信号; 从延迟单元接收信号并将其作为超声波输出的传感器; 麦克风，其检测从换能器输出的超声波; 波形特性检测单元，其对检测到的超声波进行积分，从而检测正弦波和负声波的波形特性; 以及延迟调整单元，其基于检测到的波形特性向第一延迟单元或第二延迟单元输入延迟量的信息，该延迟量根据从第一延迟单元输出的信号与信号之间的相位差 从第二延迟单元输出以减小相位差。
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公开(公告)号：US20150003624A1
公开(公告)日：2015-01-01
申请号：US14372965
申请日：2013-01-31
发明人： Yasushi Sato
CPC分类号： H04R1/1083 , G10K11/178 , G10K2210/128 , G10K2210/3221 , G10K2210/3226 , H04R1/028 , H04R3/002 , H04R3/005 , H04R5/023 , H04R2217/03 , H04R2410/05 , H04R2460/01 , H04R2499/13
摘要： In order to enable noises entering the ear from random directions to be muted without wearing headphones, this muting device is provided with: a super-directional microphone that detects noises in spot areas around the ear at pinpoints; and an ultrasonic speaker that modulates and outputs a carrier signal supplied by a transmitter according to noise signals detected by the super-directional microphone. Furthermore, an adaptive filter is provided, and the adaptive filter supplies noise signals with the opposite phase to noises detected by the super-direction microphone, and transmits an ultrasonic signal from the ultrasonic speaker toward the eardrum of a human.
摘要翻译： 为了使噪音从随机方向进入耳朵而不佩戴耳机，该静音装置设置有：一个超定向麦克风，可以精确检测耳朵周围的斑点区域的噪声; 以及超声波扬声器，其根据由所述超定向麦克风检测到的噪声信号调制并输出由发射机提供的载波信号。 此外，提供自适应滤波器，并且自适应滤波器将具有与超声麦克风检测到的噪声相反的相位的噪声信号提供给超声波扬声器的超声波信号朝向人的鼓膜发送。
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公开(公告)号：US10107885B2
公开(公告)日：2018-10-23
申请号：US14439474
申请日：2013-11-19
发明人： Yasushi Sato
IPC分类号： G01R33/563 , G01R33/60 , G01R33/34 , A61B5/024 , A61B5/055 , G01R33/36 , A61B5/00 , A61B5/18 , G01R33/341
摘要： Provided is a pulse detection apparatus and a pulse detection method less susceptible to movement of a subject and less susceptible to noise. An oscillation frequency controller is configured to cause a frequency variable oscillator to oscillate at a predetermined oscillation frequency, which is a frequency within a range assumed as a resonance frequency of a molecule of a predetermined constituent constituting the blood flowing through a human body. The oscillation frequency controller also controls an oscillation frequency based on a phase difference signal and an amplitude signal, wherein the phase difference signal indicates the phase difference between a transmission signal transmitted from an antenna to the human body and a reception signal received by the antenna, and the amplitude signal indicates the magnitude of the amplitude of the received signal. A pulse detector detects the change of the amplitude signal in an amplitude direction as a pulse signal.
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公开(公告)号：US20180017696A1
公开(公告)日：2018-01-18
申请号：US15716125
申请日：2017-09-26
发明人： Yasushi Sato
摘要： Provided is a detection circuit that has a first inductor connected to two opened input ends and detects an external signal having a waveform with a gradient at each input end. The detection sensor further includes an output circuit that has a second inductor magnetically coupled with the first inductor as a primary side. In the output circuit, a third inductor constituting a delay circuit having one end connected to an intermediate tap of the second inductor is connected. Diodes are respectively connected to terminals of the second inductor in a forward direction. Other terminals of the diodes are connected to another terminal of the third inductor via elements each having an impedance characteristic. The output circuit outputs a detection signal detected at the input ends, from the other terminal(s) of at least one of the diodes.
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公开(公告)号：US20170089864A1
公开(公告)日：2017-03-30
申请号：US15127726
申请日：2015-03-17
发明人： Yasushi Sato
CPC分类号： G01N29/12 , G01H13/00 , G01N29/043 , G01N29/343 , G01N2291/0237 , G01N2291/0258 , G01S15/04 , G01S15/88 , G07D7/08 , G07D11/0036
摘要： A sound wave sensor, capable of reliably detecting presence or absence of a banknote very easily with use of sound waves, is provided. The sound wave sensor includes a sounding body 2 that outputs a sound wave signal of a predetermined frequency, an echo body 3 opposed to the sounding body 2 in a direction in which the sounding body 2 outputs the sound wave signal, the echo body 3 being provided at a position where the sound wave signal resonates at the predetermined frequency; a slit 5 through which a sheet-like banknote 4 passes, the slit 5 being provided between the sounding body 2 and the echo body 3; and a resonance determination unit 6 that determines a resonant state of the frequency output from the sounding body 2. The resonance determination unit 6 determines a resonant state by detecting variation in power consumption of the sounding body 2.
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公开(公告)号：US10856814B2
公开(公告)日：2020-12-08
申请号：US15560765
申请日：2016-03-22
发明人： Yasushi Sato
IPC分类号： A61B5/00 , A61B5/0245
摘要： A device and method for detecting biological information without being affected by sudden-onset signal even when sudden-onset large vibration is caused while driving a vehicle or the like. Peak input and output values of a variable delay device are detected, and the difference between the values is determined by a subtractor. The difference is compared to a predetermined threshold to obtain a positive or negative output as an up/down selection output for an up/down counter. The output of the up/down counter is sent to a variable delay device with a clock generated based on an inputted peak signal of biological information to obtain a variable delay amount corresponding to one cycle of the biological information. When the subtractor output exceeds the predetermined threshold, a predetermined output voltage is generated, and an amplifier connected to the variable delay device is controlled so that the gain of the amplifier becomes zero.
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公开(公告)号：US10561322B2
公开(公告)日：2020-02-18
申请号：US15560643
申请日：2016-03-17
发明人： Yasushi Sato
IPC分类号： A61B5/021 , A61B5/024 , A61B5/0245 , A61B5/0456 , A61B5/00
摘要： An R-wave of a heartbeat signal accompanied by periodic fluctuation is detected to obtain the average value of an RR interval. Further, a waveform of a heart sound signal, which periodically fluctuates in synchronization with the heartbeat signal, is forcibly repositioned at an interval equivalent to the average value of the RR interval. After performing reposition, noise is removed by using orthogonal transformation and orthogonal inverse transformation, so that the position of obtained waveform is restored to its original position.
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