Method and apparatus for measuring biological signal
First Claim
1. An apparatus for measuring a biological signal of a body, the apparatus comprising:
- at least three interfaces;
a signal application unit which applies a signal having a predetermined frequency which is higher than a frequency of interest of the biological signal directly to a first interface from among the at least three interfaces, and one of a plurality of internal elements of the apparatus;
a feedback signal generation unit which extracts component signals from a signal obtained from the body using at least one of a second interface and a third interface from among the at least three interfaces and generates a feedback signal for removing motion artifacts based on the extracted component signals wherein the feedback signal generation unit comprises a demodulator which demodulates the signal obtained from at least one of the second interface and the third interface using the signal applied by the signal application unit; and
an input control unit which receives the generated feedback signal and controls a signal input from at least one of the second interface and third interface to an amplifier to remove the motion artifacts included in the input signal by using the feedback signal,wherein a difference between a frequency of each of the component signals and the frequency of the applied signal is within a predetermined range.
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Abstract
An apparatus for measuring a biological signal of a body, the apparatus including; at least three interfaces which obtain signals from the body, a signal application unit which applies a signal having a frequency which is higher than one of a frequency of interest of the biological signal to one of a first interface from among the at least three interfaces, and one of a plurality of internal elements of the apparatus, a feedback signal generation unit which generates a feedback signal from component signals generated due to the applied signal, wherein the feedback signal generation unit generates the feedback signal using a signal obtained from at least one of a second interface and a third interface from among the at least three interfaces and an input control unit which receives the generated feedback signal and controls a signal input from at least one of the second interface and third interface to an amplifier.
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Citations
16 Claims
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1. An apparatus for measuring a biological signal of a body, the apparatus comprising:
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at least three interfaces; a signal application unit which applies a signal having a predetermined frequency which is higher than a frequency of interest of the biological signal directly to a first interface from among the at least three interfaces, and one of a plurality of internal elements of the apparatus; a feedback signal generation unit which extracts component signals from a signal obtained from the body using at least one of a second interface and a third interface from among the at least three interfaces and generates a feedback signal for removing motion artifacts based on the extracted component signals wherein the feedback signal generation unit comprises a demodulator which demodulates the signal obtained from at least one of the second interface and the third interface using the signal applied by the signal application unit; and an input control unit which receives the generated feedback signal and controls a signal input from at least one of the second interface and third interface to an amplifier to remove the motion artifacts included in the input signal by using the feedback signal, wherein a difference between a frequency of each of the component signals and the frequency of the applied signal is within a predetermined range. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method of measuring a biological signal of a body using an apparatus for measuring the biological signal, the method comprising:
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applying a signal having a predetermined frequency higher than a frequency of interest of the biological signal directly to a first interface from among the at least three interfaces and one of a plurality of internal elements of the apparatus; extracting component signals from a signal obtained from the body using at least one of a second interface and a third interface from among the at least three interfaces; generating a feedback signal for removing motion artifacts based on the extracted component signals wherein the generating of the feedback signal comprises demodulating the signal obtained from at least one of the second interface and the third interface using the applied signal; receiving the generated feedback signal, controlling a signal input from at least one of the second interface and the third interface to remove the motion artifacts included in the input signal by using the feedback signal and sending the controlled signal to an amplifier; and outputting a measured biological signal of the body using the controlled signal, wherein a difference between a frequency of each of the component signals and the frequency of the applied signal is within a predetermined range. - View Dependent Claims (11, 12, 13, 14, 15)
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16. An apparatus for measuring a biological signal of a body, the apparatus comprising:
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at least three interfaces; a signal application unit which applies a carrier signal which has a predetermined frequency higher than a frequency of interest of the biological signal directly to a first interface from among the at least three interfaces, and one of a plurality of internal elements of the apparatus; and a feedback signal generation unit which generates a feedback signal from component signals generated due to the applied carrier signal, using a signal obtained from the body using at least one of a second interface and a third interface from among the at least three interfaces wherein the feedback signal generation unit comprises a demodulator which demodulates the signal obtained from at least one of the second interface and the third interface using the signal applied by the signal application unit, wherein the carrier signal is synthesized based on a signal having a frequency higher than a frequency of interest of the biological signal, and the feedback signal received from the feedback signal generation unit, and is output from the signal application unit.
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Specification