Apparatus and method of measuring pulse wave
First Claim
1. An apparatus for measuring a pulse wave, the apparatus comprising:
- a first receiver that receives a first pulse wave signal that is detected at a first point of an object;
a second receiver that receives a second pulse wave signal that is detected at a second point of the object;
an effective signal determiner configured to receive at least one signal, from among an output signal of the first receiver and an output signal of the second receiver, and determine an effective pulse wave signal period using the at least one output signal;
a first signal processor configured to detect a peak of an output signal of the first receiver as a first peak value, compare a magnitude of the output signal of the first receiver with a first comparative reference value, the first comparative reference value being less than the first peak value by a predetermined percentage during the effective pulse wave signal period, and determine a first output value based on a result of the comparison;
a second signal processor configured to detect a peak of the output signal of the second receiver as a second peak value, compare a magnitude of an output signal of the second receiver with a second comparative reference value, the second comparative reference value being less than the second peak value by the predetermined percentage during the effective pulse wave signal period, and determine a second output value based on a result of the comparison; and
a pulse transit time (PTT) obtainer configured to obtain a PTT from using the first output value of the first signal processor and second the output value of the second signal processor to determine a beginning time and an ending time for the pulse transit time.
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Accused Products
Abstract
Provided is an apparatus and method of measuring a pulse wave. The method includes: causing receivers to respectively receive pulse wave signals that are detected at two points of an object, determining an effective pulse wave signal period by using the received pulse wave signals, and obtaining a pulse transit time (PTT) between the two points by using a result obtained after comparing a magnitude of an output signal of each of the receivers with a value that is less by a predetermined percentage than a peak value of an output signal of each of the receivers during the determined effective pulse wave signal period.
4 Citations
21 Claims
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1. An apparatus for measuring a pulse wave, the apparatus comprising:
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a first receiver that receives a first pulse wave signal that is detected at a first point of an object; a second receiver that receives a second pulse wave signal that is detected at a second point of the object; an effective signal determiner configured to receive at least one signal, from among an output signal of the first receiver and an output signal of the second receiver, and determine an effective pulse wave signal period using the at least one output signal; a first signal processor configured to detect a peak of an output signal of the first receiver as a first peak value, compare a magnitude of the output signal of the first receiver with a first comparative reference value, the first comparative reference value being less than the first peak value by a predetermined percentage during the effective pulse wave signal period, and determine a first output value based on a result of the comparison; a second signal processor configured to detect a peak of the output signal of the second receiver as a second peak value, compare a magnitude of an output signal of the second receiver with a second comparative reference value, the second comparative reference value being less than the second peak value by the predetermined percentage during the effective pulse wave signal period, and determine a second output value based on a result of the comparison; and a pulse transit time (PTT) obtainer configured to obtain a PTT from using the first output value of the first signal processor and second the output value of the second signal processor to determine a beginning time and an ending time for the pulse transit time. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A method of measuring a pulse wave, the method comprising:
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receiving at a first receiver, a first pulse wave signal that is detected at a first point of an object and receiving at a second receiver, a second pulse wave signal that is detected at a second point of the object; determining an effective pulse wave signal period by using at least one signal from among an output signal of the first receiver and an output signal of the second receiver; during the effective pulse wave signal period, detecting a peak of the output signal of the first receiver as a first peak signal and detecting a peak of the output signal of the second receiver as a second peak signal; determining a first output value based on a result obtained after comparing magnitudes of the output signal of the first receiver with a first comparative value, the first comparative value being less than the first peak value of the output signal of the first receiver and determining a second output value based on a result obtained after comparing magnitudes of the output signal of the second receiver with a second comparative value, the second comparative value being less than the second peak value of the output signal of the second receiver; and obtaining a pulse transit time (PTT) from a beginning point to an ending point by using the first output value and the second output value. - View Dependent Claims (18, 19, 20, 21)
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Specification