SYSTEM AND METHOD FOR CAPTURING AND DECONTAMINATING PHOTOPLETHYSMOPGRAPHY (PPG) SIGNALS IN A VEHICLE
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Abstract
A system and method for processing photoplethysmography (PPG) signals in a vehicle. The system and method include receiving a PPG waveform signal from an optical sensor. The system and method also include processing a PPG measurement signal based on the PPG waveform signal. The system and method additionally include receiving a noise waveform signal from at least one of: a seat assembly sensor, a vehicle sensor, and a vehicle system. Additionally, the system and method include processing a motion artifacts measurement signal based on the noise waveform signal. The system and method further include processing a refined PPG signal to suppress the motion artifacts measurement signal from the PPG measurement signal.
27 Citations
40 Claims
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1-20. -20. (canceled)
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21. A computer-implemented method for processing photoplethysmography (PPG) signals in a vehicle, comprising:
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receiving a plurality of PPG waveform signals output from a plurality of optical sensors included in one or more sensor assemblies; receiving a plurality of pressure measurement signals output from a plurality of pressure sensors included in the one or more sensor assemblies; selecting optimum PPG waveform signals from the plurality of PPG waveform signals based on the plurality of pressure measurement signals and based on a position of a driver in the vehicle; aggregating the optimum PPG waveform signals into a PPG measurement signal; and outputting the PPG measurement signal to determine a state of the driver. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32)
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33. A system for processing photoplethysmography (PPG) signals in a vehicle, comprising:
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a computing device that includes a processor; and a PPG determinant module that is included as a module of the computing device that; receives a plurality of PPG waveform signals output from a plurality of optical sensors included in one or more sensor assemblies, receives a plurality of pressure measurement signals output from a plurality of pressure sensors included in the one or more sensor assemblies, evaluates the plurality of PPG waveform signals to determine a set of consistent PPG waveform signals including optimum PPG waveform signals selected from the plurality of PPG waveform signals based on the plurality of pressure measurement signals and based on a position of a driver in the vehicle, aggregates the set of consistent PPG waveform signals into a PPG measurement signal, and outputs the PPG measurement signal to the computing device. - View Dependent Claims (34, 35, 36)
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37. A non-transitory computer-readable medium for detecting a head pose in a vehicle including instructions stored thereon, that when executed by a processor perform a method, the method comprising:
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receiving a plurality of PPG waveform signals output from a plurality of optical sensors included in one or more sensor assemblies; receiving a plurality of pressure measurement signals output from a plurality of pressure sensors included in the one or more sensor assemblies; selecting optimum PPG waveform signals from the plurality of PPG waveform signals based on the plurality of pressure measurement signals and based on a position of a driver in the vehicle; aggregating the optimum PPG waveform signals into a PPG measurement signal; and transmitting the PPG measurement signal to a control device for signal processing. - View Dependent Claims (38, 39, 40)
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Specification