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US 8,298,141 B2Granted
Method for measuring physiological parameters
AssigneeIndustrial Technology Research Institute
InventorsTai Been Chen, Yen Hsien Lee, Mu Yu Tsai, Yu Jen Su
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Abstract
A method for measuring physiological parameters uses statistical properties, spectrum analysis and feedback mechanisms to remove the signal noise generated by human body movement from a detected physiological signal.
Claims39
A method for measuring physiological parameters, the method comprising the steps of:
- continuously receiving a physiological signal, wherein the physiological signal comprises at least one physiological parameter of a subject;
- calculating a statistical parameter of the physiological signal;
- determining whether the physiological signal comprises movement interference noise according to the statistical parameter;
- reducing the movement interference noise if it is determined that the received signal comprises the movement interference noise;
- calculating a maximum value of the physiological signal on a frequency spectrum using a Fast Fourier Transform, and deciding at least one physiological parameter of the subject according to the step of calculating the maximum value;
- deciding the maximum value of the physiological signal on the frequency spectrum using the Fast Fourier Transform;
- and
- determining whether the maximum value is able to be used as a dominant frequency of the physiological signal.
5 more elements
A method for measuring physiological parameters, the method comprising the steps of:
- continuously receiving a physiological signal, wherein the physiological signal comprises at least one physiological parameter of a subject;
- calculating a statistical parameter of the physiological signal;
- determining whether the physiological signal comprises movement interference noise according to the statistical parameter;
- reducing the movement interference noise if it is determined that the received signal comprises the movement interference noise;
- and
- calculating a maximum value of the physiological signal on a frequency spectrum using a Fast Fourier Transform, and deciding at least one physiological parameter of the subject according to the step of calculating a maximum value;
- wherein the determining step is to determine whether a difference between each sampling point of the physiological signal and an average value of the physiological signal is greater than an integral multiple of a standard deviation of the physiological signal;
- if the difference is greater than the integral multiple of the standard deviation of the physiological signal, then the received signal is determined to include the movement interference noise.
5 more elements
Dependencies are inferred from the claim text.