SYSTEMS AND METHODS FOR DETECTING PULSES
First Claim
1. A method for detecting pulses in a PPG signal, the method comprising:
- detecting local minima and local maxima points in the PPG signal;
comparing segments formed by pairs of the local minima and local maxima points to a number of respective neighboring segments; and
determining based at least in part upon the comparison if each segment is a pulse segment.
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Abstract
According to embodiments, systems and methods are provided for detecting pulses in a PPG signal. Local minima and maxima points may be identified in the PPG signal. Each minimum may be paired with an adjacent maximum forming an upstroke segment. Noise may be removed by comparing adjacent segments and ignoring segments that are too long or too large. Notches in the pulse may be identified and ignored by analyzing adjacent segments. Adjacent upstroke segments may be combined as a single upstroke if the lengths of adjacent upstroke segments are about the same, have similar slopes, and the end point of one segment is close to the start point of an adjacent segment. Segments having small temporal or amplitude difference relative to adjacent segments may be disregarded. The remaining segments may represent the pulse upticks. A sliding time window may be used instead to detect pulses in the PPG signal.
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Citations
21 Claims
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1. A method for detecting pulses in a PPG signal, the method comprising:
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detecting local minima and local maxima points in the PPG signal; comparing segments formed by pairs of the local minima and local maxima points to a number of respective neighboring segments; and determining based at least in part upon the comparison if each segment is a pulse segment. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A system for detecting pulses in a signal, the system comprising:
processing circuitry capable of; receiving an input signal; detecting local minima and local maxima points in the input signal, comparing segments formed by pairs of the local minima and local maxima points to a number of respective neighboring segments, and determining based at least in part upon the comparison if each segment is a pulse segment. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A computer-readable medium having logic recorded thereon for performing a method for detecting pulses in a PPG signal, the method comprising:
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detecting local minima and local maxima points in the PPG signal; comparing segments formed by pairs of the local minima and local maxima points to a number of respective neighboring segments; and determining based at least in part upon the comparison if each segment is a pulse segment.
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Specification