Method and device for measuring electrical impedance of biological tissues

    公开(公告)号:US10660540B2

    公开(公告)日:2020-05-26

    申请号:US15665903

    申请日:2017-08-01

    Abstract: A device for measuring an electrical impedance of biologic tissue may include electrodes configured to contact the biologic tissue and generate a differential voltage thereon. The device may include a first circuit coupled to the electrodes and configured to force an oscillating input signal therethrough, and a differential amplitude modulation (AM) demodulator coupled to the plurality of electrodes. The differential AM demodulator may be configured to demodulate the differential voltage, and generate a base-band signal representative of the demodulated differential voltage. The device may further include an output circuit downstream from the differential AM demodulator and may be configured to generate an output signal representative of the electrical impedance as a function of the base-band signal.

    BREATHING ACTIVITY MONITORING DEVICE, CORRESPONDING SYSTEM AND METHOD

    公开(公告)号:US20190231227A1

    公开(公告)日:2019-08-01

    申请号:US16259254

    申请日:2019-01-28

    Inventor: Stefano Rossi

    Abstract: A device for monitoring breathing activity of, e.g., athletes while exercising includes a breathing activity sensor configured to be worn by a wearer and to provide a breathing activity signal indicative of the breathing activity of the wearer. A motion sensor is configured to be worn by the wearer and to provide a motion signal indicative of the motion activity of the wearer. A processing arrangement is coupled to the breathing activity sensor to process the breathing activity signal and produce a processed breathing activity signal. The processing arrangement includes filter circuitry having a first filtering bandwidth and a second filtering bandwidth. The first filtering bandwidth is larger than the second filtering bandwidth. The filter circuitry is coupled to the motion sensor and operates with one of the first filtering bandwidth and the second filtering bandwidth selected as a function of the motion signal from the motion sensor.

    Breathing activity monitoring device, corresponding system and method

    公开(公告)号:US11116427B2

    公开(公告)日:2021-09-14

    申请号:US16259254

    申请日:2019-01-28

    Inventor: Stefano Rossi

    Abstract: A device for monitoring breathing activity of, e.g., athletes while exercising includes a breathing activity sensor configured to be worn by a wearer and to provide a breathing activity signal indicative of the breathing activity of the wearer. A motion sensor is configured to be worn by the wearer and to provide a motion signal indicative of the motion activity of the wearer. A processing arrangement is coupled to the breathing activity sensor to process the breathing activity signal and produce a processed breathing activity signal. The processing arrangement includes filter circuitry having a first filtering bandwidth and a second filtering bandwidth. The first filtering bandwidth is larger than the second filtering bandwidth. The filter circuitry is coupled to the motion sensor and operates with one of the first filtering bandwidth and the second filtering bandwidth selected as a function of the motion signal from the motion sensor.

    Compensation and calibration for a low power bio-impedance measurement device

    公开(公告)号:US10758152B2

    公开(公告)日:2020-09-01

    申请号:US16429254

    申请日:2019-06-03

    Abstract: A method and apparatus for compensating and calibrating a bio-impedance measurement device are provided. In the method and apparatus, a memory stores a plurality of compensation parameters and a first detection channel receives a first detection signal, compensates the first detection signal using a first compensation parameter of the plurality of compensation parameters. In the method and apparatus, a second detection channel receives a second detection signal and a third detection signal and compensates the second and third detection signals using second and third compensation parameters of the plurality of compensation parameters and the compensated first detection signal. The impedance measurement device generates a first output signal representative of a first impedance measurement and a second output signal representative of a second impedance measurement based on the compensated first, second and third detection signals.

    Wearable sensing device
    5.
    发明授权

    公开(公告)号:US11571157B2

    公开(公告)日:2023-02-07

    申请号:US16734264

    申请日:2020-01-03

    Abstract: A wearable sensing device includes a connector socket provided with contact pads connectable to sensing electrodes for sensing biological electrical signals. A supply module is provided with a battery, which is housed in a first casing configured for reversible coupling with the connector socket. A control module is housed in a second casing distinct from the first casing and configured for coupling with the supply module and with the connector socket. The control module is equipped with a processing unit configured to process biological electrical signals detectable through the contact pads. Mechanical-connection members couple the supply module to the connector socket. Electrical-connection members distinct from the mechanical-connection members are configured to connect the battery and the contact pads to the control module.

    Device for measuring impedance of biologic tissues including an alternating current (AC) coupled voltage-to-current converter

    公开(公告)号:US10357176B2

    公开(公告)日:2019-07-23

    申请号:US15338674

    申请日:2016-10-31

    Inventor: Stefano Rossi

    Abstract: A device for measuring impedance of biological tissue may include electrodes and a voltage-to-current converter coupled to the electrodes to drive an alternating current (AC) through the tissue and sense an AC voltage. The converter may include an amplifier having first and second inputs and an output, a first voltage divider coupled to the first input, a second voltage divider coupled to the second input, a filter capacitor coupled between the output and the second voltage divider, a current limiting resistor coupled between the second input the second voltage divider, and a bypass capacitor coupled to the second input of the amplifier and in parallel with the resistor. A single-ended amplitude modulation (AM) demodulator may demodulate the AC voltage and generate a corresponding baseband voltage representing the impedance. The device may also include an output circuit to generate output signals representative of DC and AC components of the baseband voltage.

    Compensation and calibration for a low power bio-impedance measurement device

    公开(公告)号:US10401465B2

    公开(公告)日:2019-09-03

    申请号:US15380597

    申请日:2016-12-15

    Abstract: A method and apparatus for compensating and calibrating a bio-impedance measurement device are provided. In the method and apparatus, a memory stores a plurality of compensation parameters and a first detection channel receives a first detection signal, compensates the first detection signal using a first compensation parameter of the plurality of compensation parameters. In the method and apparatus, a second detection channel receives a second detection signal and a third detection signal and compensates the second and third detection signals using second and third compensation parameters of the plurality of compensation parameters and the compensated first detection signal. The impedance measurement device generates a first output signal representative of a first impedance measurement and a second output signal representative of a second impedance measurement based on the compensated first, second and third detection signals.

    COMPENSATION AND CALIBRATION FOR A LOW POWER BIO-IMPEDANCE MEASUREMENT DEVICE

    公开(公告)号:US20190285717A1

    公开(公告)日:2019-09-19

    申请号:US16429254

    申请日:2019-06-03

    Abstract: A method and apparatus for compensating and calibrating a bio-impedance measurement device are provided. In the method and apparatus, a memory stores a plurality of compensation parameters and a first detection channel receives a first detection signal, compensates the first detection signal using a first compensation parameter of the plurality of compensation parameters. In the method and apparatus, a second detection channel receives a second detection signal and a third detection signal and compensates the second and third detection signals using second and third compensation parameters of the plurality of compensation parameters and the compensated first detection signal. The impedance measurement device generates a first output signal representative of a first impedance measurement and a second output signal representative of a second impedance measurement based on the compensated first, second and third detection signals.

    METHOD AND DEVICE FOR MEASURING ELECTRICAL IMPEDANCE OF BIOLOGICAL TISSUES

    公开(公告)号:US20170354345A1

    公开(公告)日:2017-12-14

    申请号:US15665903

    申请日:2017-08-01

    CPC classification number: A61B5/0535 A61B5/6804 G01N27/028

    Abstract: A device for measuring an electrical impedance of biologic tissue may include electrodes configured to contact the biologic tissue and generate a differential voltage thereon. The device may include a first circuit coupled to the electrodes and configured to force an oscillating input signal therethrough, and a differential amplitude modulation (AM) demodulator coupled to the plurality of electrodes. The differential AM demodulator may be configured to demodulate the differential voltage, and generate a base-band signal representative of the demodulated differential voltage. The device may further include an output circuit downstream from the differential AM demodulator and may be configured to generate an output signal representative of the electrical impedance as a function of the base-band signal.

    Device for measuring impedance of biologic tissues including an alternating current (AC) coupled voltage-to-current converter
    10.
    发明授权
    Device for measuring impedance of biologic tissues including an alternating current (AC) coupled voltage-to-current converter 有权
    用于测量包括交流(AC)耦合电压 - 电流转换器的生物组织阻抗的装置

    公开(公告)号:US09510768B2

    公开(公告)日:2016-12-06

    申请号:US14480024

    申请日:2014-09-08

    Inventor: Stefano Rossi

    Abstract: A device for measuring impedance of biological tissue may include electrodes and a voltage-to-current converter coupled to the electrodes to drive an alternating current (AC) through the tissue and sense an AC voltage. The converter may include an amplifier having first and second inputs and an output, a first voltage divider coupled to the first input, a second voltage divider coupled to the second input, a filter capacitor coupled between the output and the second voltage divider, a current limiting resistor coupled between the second input the second voltage divider, and a bypass capacitor coupled to the second input of the amplifier and in parallel with the resistor. A single-ended amplitude modulation (AM) demodulator may demodulate the AC voltage and generate a corresponding baseband voltage representing the impedance. The device may also include an output circuit to generate output signals representative of DC and AC components of the baseband voltage.

    Abstract translation: 用于测量生物组织的阻抗的装置可以包括电极和耦合到电极的电压 - 电流转换器,以驱动通过组织的交流电(AC)并感测AC电压。 转换器可以包括具有第一和第二输入和输出的放大器,耦合到第一输入的第一分压器,耦合到第二输入的第二分压器,耦合在输出和第二分压器之间的滤波电容器, 耦合在第二输入端和第二分压器之间的限流电阻器和耦合到放大器的第二输入端并与电阻器并联的旁路电容器。 单端幅度调制(AM)解调器可以解调AC电压并产生表示阻抗的相应基带电压。 该器件还可以包括输出电路,以产生表示基带电压的DC和AC分量的输出信号。

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