Patents Assigned to AI TECHNOLOGY INC.
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Patent number: 10856814Abstract: 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.Type: GrantFiled: March 22, 2016Date of Patent: December 8, 2020Assignees: KYUSHU INSTITUTE OF TECHNOLOGY, AI TECHNOLOGY INC.Inventor: Yasushi Sato
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Patent number: 10561322Abstract: 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.Type: GrantFiled: March 17, 2016Date of Patent: February 18, 2020Assignees: KYUSHU INSTITUTE OF TECHNOLOGY, AI TECHNOLOGY INC.Inventor: Yasushi Sato
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Patent number: 10349858Abstract: 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.Type: GrantFiled: March 17, 2016Date of Patent: July 16, 2019Assignees: KYUSHU INSTITUTE OF TECHNOLOGY, AI TECHNOLOGY INC.Inventor: Yasushi Sato
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Patent number: 10058304Abstract: 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.Type: GrantFiled: March 17, 2016Date of Patent: August 28, 2018Assignees: KYUSHU INSTITUTE OF TECHNOLOGY, AI TECHNOLOGY INC.Inventor: Yasushi Sato
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Patent number: 9971056Abstract: A first oscillation circuit in which a helical antenna is used as a part of an element for a resonance circuit and a second oscillation circuit in which a loop antenna is used as a part of an element for a resonance circuit are caused to oscillate at substantially the same frequency. When a human body approaches the helical antenna and the loop antenna, the frequency difference between the first oscillation circuit and the second oscillation circuit increases. This frequency difference is extracted using a BPF.Type: GrantFiled: September 10, 2014Date of Patent: May 15, 2018Assignees: KYUSHU INSTITUTE OF TECHNOLOGY, AI TECHNOLOGY INC.Inventor: Yasushi Sato
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Publication number: 20180092552Abstract: 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.Type: ApplicationFiled: March 17, 2016Publication date: April 5, 2018Applicants: KYUSHU INSTITUTE OF TECHNOLOGY, AI TECHNOLOGY INC.Inventor: Yasushi SATO
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Publication number: 20180085067Abstract: In order to be able to accurately identify a signal source using a radio wave-type non-contact radio wave sensor without being affected by surrounding environmental vibrations, a first environmental information associated with a biological information detected by a first non-contact sensor, and a second environmental information associated with a biological information detected by a second non-contact sensor are subtracted by a first subtractor, and the signal from the first subtractor is added to a first adaptive filter and extracted as a noise source. Next, the noise source signal extracted by the adaptive filter is subtracted from the first environmental information associated with the biological information detected by the first non-contact sensor by a second subtractor, and the position of a subject is identified in accordance with the magnitude of the signal from the second subtractor.Type: ApplicationFiled: March 22, 2016Publication date: March 29, 2018Applicants: KYUSHU INSTITUTE OF TECHNOLOGY, AI TECHNOLOGY INC.Inventor: Yasushi SATO
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Publication number: 20180078211Abstract: 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.Type: ApplicationFiled: March 22, 2016Publication date: March 22, 2018Applicants: KYUSHU INSTITUTE OF TECHNOLOGY, AI TECHNOLOGY INC.Inventor: Yasushi SATO
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Publication number: 20180070919Abstract: 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.Type: ApplicationFiled: March 17, 2016Publication date: March 15, 2018Applicants: KYUSHU INSTITUTE OF TECHNOLOGY, AI TECHNOLOGY INC.Inventor: Yasushi SATO
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Publication number: 20180049660Abstract: 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.Type: ApplicationFiled: March 17, 2016Publication date: February 22, 2018Applicants: KYUSHU INSTITUTE OF TECHNOLOGY, AI TECHNOLOGY INC.Inventor: Yasushi SATO
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Publication number: 20180042499Abstract: A radio wave transmitted from an oscillation source through a first antenna is received each by a second antenna and a third antenna, and a synchronous detection is performed. Variation in impedance of a subject, i.e., variation in impedance of a human body, causes an effect equivalent to performing amplitude modulation with respect to an unmodulated radio wave, and gain fluctuation of a received radio wave caused due to the existence of the human body is cancelled out by a differential amplifier.Type: ApplicationFiled: March 7, 2016Publication date: February 15, 2018Applicants: KYUSHU INSTITUTE OF TECHNOLOGY, AI TECHNOLOGY INC.Inventor: Yasushi SATO