Device, system and method for detection and processing of heartbeat signals
First Claim
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1. A heart beat detection device, comprising:
- at least one optical sensor unit configured to be placed on a person'"'"'s skin, the optical sensor unit including;
a light emitter and a corresponding light receiver, the light emitter configured for emitting light onto the person'"'"'s skin, the light receiver configured to convert light received from the skin into an electric signal,the sensor unit further including electrically adjustable optical filters connected to the emitter, to the receiver, or to both,the electrically adjustable optical filters configured to select, upon operation, a desired wavelength of the light emitted by the light emitter, of the light receivable by the light receiver, or both,wherein the electrically adjustable optical filters include Fabry-Perot monochromators.
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Abstract
A heart beat detection device comprises at least one optical reflection sensor to be positioned on the skin of a person. The sensor unit is provided with a light emitter and a corresponding light receiver which converts the light reflected by the skin into an electric signal and comprises electrically adjustable opt cal filters connected to the emitter, to the receiver or to both of them in order to select, upon operation, a desired light wavelength and perform processing of the signals thus obtained in order to reinforce the heart beat signal. A system with this device and a detection method are also described.
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Citations
16 Claims
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1. A heart beat detection device, comprising:
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at least one optical sensor unit configured to be placed on a person'"'"'s skin, the optical sensor unit including; a light emitter and a corresponding light receiver, the light emitter configured for emitting light onto the person'"'"'s skin, the light receiver configured to convert light received from the skin into an electric signal, the sensor unit further including electrically adjustable optical filters connected to the emitter, to the receiver, or to both, the electrically adjustable optical filters configured to select, upon operation, a desired wavelength of the light emitted by the light emitter, of the light receivable by the light receiver, or both, wherein the electrically adjustable optical filters include Fabry-Perot monochromators. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method for increasing the signal/noise ratio of an electric signal for detecting heart beat optically by means of an optical reflection sensor unit, the method comprising:
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differentiating, by means of an adaptive numerical filter, between the effects of at least two light wavelengths by means of electrically adjustable optical filters, a first wavelength of the two light wavelengths associated with operation of the optical reflection sensor unit in an absorption mode, a second wavelength of the two light wavelengths associated with operation of the optical reflection sensor unit in a fluorescence mode; and processing the corresponding signals received from the optical reflection sensor unit so as to obtain the electric signal representing the heart beat, wherein the electrically adjustable optical filters are adjusted so as to tune dynamically the two (or more) wavelengths in order to maximize signal levels of the optical reflection sensor unit. - View Dependent Claims (13, 14, 15, 16)
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Specification