Remote sensing system with time-of-flight sensor, active illuminator and light sensing system
A remote sensing system worn by a user comprises a plurality of LEDs that generate light having one or more optical wave lengths. Lenses direct a portion of the light towards bodily tissue of the user. A plurality of detectors are separated from each other to receive a portion of the light, generate an output signal that is synchronized to the light source. A signal to noise ratio of the output signal is increased by increasing the light intensity. The detection system compares a first signal with the LEDs off and a second signal with the LEDs on to increase the signal-to-noise ratio. The detection system is coupled to a processor, a display, and a light sensing system. The light sensing system comprises wavelength filters, a second detector, a second analog-to-digital converter that generates a color output that is used by the processor to display some of the physiological parameters.
1 . A system worn by a user, the system comprising:
a light source comprising a plurality of light emitting diodes that are configured to generate an output optical light having one or more optical wavelengths;
one or more lenses configured to receive at least a portion of the output optical light and to direct a lens output light towards a bodily tissue of the user; and
a detection system comprising a plurality of detectors that are spatially separated from each other, the detection system configured to: (i) receive at least a portion of the lens output light reflected from the bodily tissue and (ii) generate an output signal having a signal-to-noise ratio, and (iii) be synchronized to the light source, wherein the output signal is associated with one or more physiological parameters;
wherein the signal-to-noise ratio of the output signal is configured to be increased by increasing light intensity of at least one of the plurality of light emitting diodes from an initial light intensity;
wherein at least one analog to digital converter is coupled to at least one of the plurality of detectors; and
wherein the detection system is further configured to:
generate a first signal responsive to light received while the light emitting diodes are off,
generate a second signal responsive to light received while at least one of the light emitting diodes is on, and
further increase the signal-to-noise ratio by comparing the first signal and the second signal; and
wherein the light source and the detection system are further configured to be coupled to a processor, a display device, and a light sensing system, the light sensing system comprising:
one or more wavelength filters configured to separate incoming ambient light into one or more wavelength bands;
a second one or more detectors configured to capture at least some of the one or more wavelength bands;
a second analog to digital converter coupled to the second one or more detectors that is configured to generate a color output; and
wherein the processor is configured to receive at least a portion of the color output and adjust a visual output of the display device, and wherein the display device is configured to display at least some of the one or more physiological parameters.
2 . The system of claim 1 , wherein the plurality of light emitting diodes comprises six light emitting diodes, and wherein the detection system comprises the plurality of detectors arranged along an arc.
3 . The system of claim 1 , wherein the system is configured to use artificial intelligence in making decisions associated with at least a portion of the output signal.
4 . The system of claim 3 , wherein the system further comprises a biosensor, the biosensor configured to generate physiological data of the user, and wherein the system is further configured to combine at least a part of the output signal with physiological data from the biosensor.
5 . The system of claim 4 , wherein the system is further configured to transmit at least a part of the output signal and some of the physiological data of the user to a smart phone or a tablet, the smart phone or the tablet comprising a wireless receiver, a wireless transmitter, another display device, a speaker, a voice input module, a microprocessor, and a touch screen.
6 . The system of claim 5 , wherein the output optical light comprises three optical wavelengths for calibrating a measurement of at least a portion of the one or more of the physiological parameters, and wherein the three optical wavelengths comprise near infrared or visible wavelengths.
7 . The system of claim 5 , wherein the color output is configured to change based on variations due to sunlight.
8 . A system worn by a user comprising:
a light source comprising a plurality of light emitting diodes that are configured to generate an output optical light having one or more optical wavelengths;
one or more lenses configured to receive at least a portion of the output optical light and to direct a lens output light towards a bodily tissue of the user; and
a detection system comprising a plurality of detectors that are spatially separated from each other, the detection system configured to: (i) receive at least a portion of the lens output light reflected from the bodily tissue and (ii) generate an output signal having a signal-to-noise ratio, and (iii) be synchronized to the light source, wherein the output signal is associated with one or more physiological parameters;
wherein the signal-to-noise ratio of the output signal is configured to be increased by increasing light intensity of at least one of the plurality of light emitting diodes from an initial light intensity;
wherein at least one analog to digital converter is coupled to at least one of the plurality of detectors;
wherein the detection system is further configured to:
generate a first signal responsive to light received while the light emitting diodes are off,
generate a second signal responsive to light received while at least one of the light emitting diodes is on, and
further increase the signal-to-noise ratio by comparing the first signal and the second signal;
wherein the light source and the detection system are further configured to be coupled to a processor, a display device, and a light sensing system, the light sensing system comprising:
a multi-wavelength filter to separate incoming ambient light into a series of wavelength bands; and
a detector array configured to capture at least some of the series of wavelength bands and configured to be coupled to a second one or more analog to digital converters to generate a color output; and
wherein the processor is configured to receive at least a portion of the color output and adjust a visual output of the display device, and wherein the display device is configured to display at least some of the one or more physiological parameters.
9 . The system of claim 8 , wherein the plurality of light emitting diodes comprises six light emitting diodes, and wherein the detection system comprises the plurality of detectors arranged along an arc.
10 . The system of claim 8 , wherein the system is configured to use artificial intelligence in making decisions associated with at least a portion of the output signal, and wherein the system is further configured to combine at least a part of the output signal with data from other non-invasive devices or biosensors adapted to be placed on the user.
11 . The system of claim 10 , wherein the output optical light comprises three optical wavelengths for calibrating a measurement of at least a portion of the one or more physiological parameters, and wherein the three optical wavelengths comprise near infrared or visible wavelengths.
12 . The system of claim 8 , wherein the color output is configured to change based on variations due to sunlight.
13 . The system of claim 12 , wherein the processor is configured to be coupled to a non-transitory computer readable medium and is configured to use pattern matching algorithms to determine at least a part of the one or more physiological parameters.
14 . A physiological measurement device comprising:
a housing configured to be physically applied to a user;
a light source physically incorporated into the housing, the light source being configured to emit light;
a plurality of detectors including a first detector, a second detector, and a third detector,
the first detector being (i) configured to detect light and (ii) physically incorporated into a first side of the housing such that the first detector is positioned to face a first direction,
the second detector being (i) configured to detect light and (ii) physically incorporated into the first side of the housing such that the second detector is positioned to face a second direction, and
the third detector being (i) configured to detect ambient light and (ii) physically incorporated into a second opposing side of the housing such that the third detector is positioned to face a third direction, the third direction being generally opposite the first direction;
a processor coupled to the housing and configured to:
with the housing physically applied to the user such that the light source, the first detector, and the second detector are adjacent to a tissue of the user, generate a first reflected light signal, the first reflected light signal being associated with light reflected from the tissue of the user that was emitted from the light source and received by the first detector;
with the housing physically applied to the user such that the light source, the first detector, and the second detector are adjacent to the tissue of the user, generate a second reflected light signal, the second reflected light signal being associated with light reflected from the tissue of the user that was emitted from the light source and received by the second detector;
with (i) the housing physically applied to the user such that the light source, the first detector, and the second detector are adjacent to the tissue of the user and (ii) the light source not emitting light, generate a first ambient light signal, the first ambient light signal being associated with ambient light received by (i) the first detector, (ii) the second detector, or (iii) both;
with the housing physically applied to the user such that the light source, the first detector, and the second detector are adjacent to the tissue of the user, generate a second ambient light signal, the second ambient light signal being associated with ambient light received by the third detector;
perform an analysis of the first reflected light signal, the second reflected light signal, and the first ambient light signal;
based at least in part on the performed analysis, generate a processed output signal having a signal-to-noise ratio that is greater than a signal-to-noise ratio of the first reflected light signal, the processed output signal being associated with a physiological parameter of the user; and
using the processed output signal, determine a measurement of the physiological parameter for the user.
15 . The physiological measurement device of claim 14 , wherein the second direction is generally the same as the first direction.
16 . The physiological measurement device of claim 14 , wherein the processor is further configured to cause a display device to graphically display the measurement of the physiological parameter for the user.
17 . The physiological measurement device of claim 16 , wherein the graphical display of the measurement of the physiological parameter for the user is based at least in part on the second ambient light signal.
18 . The physiological measurement device of claim 17 , wherein the display device is coupled to the physiological measurement device.
19 . The physiological measurement device of claim 17 , wherein the display device is associated with the physiological measurement device.
20 . The physiological measurement device of claim 16 , wherein the processor is further configured to, using the second ambient light signal, adjust the graphical display of the display device.
21 . The physiological measurement device of claim 16 , further comprising:
a multi-wavelength filter positioned adjacent to the third detector and configured to separate incoming ambient light into a series of wavelength bands, the third detector being configured to capture at least a portion of the series of wavelength bands; and
an analog to digital converter coupled to the third detector, the processor being further configured to cause the analog to digital converter to convert the second ambient light signal to a digital ambient light signal.