Liquid measurement systems, apparatus, and methods optimized with temperature sensing
An apparatus for measuring liquid volume in a container includes a plurality of light sources for emitting electromagnetic radiation (EMR) toward the container, a plurality of sensors optically coupleable to the plurality of light sources, each sensor of the plurality of sensors for detecting the EMR emitted by at least a portion of the plurality of light sources, a temperature sensor for measuring at least one temperature associated with a liquid in the container, and at least one processor for receiving data representative of the portion of the detected EMR from each of the plurality of sensors, comparing the at least one measured temperature to a temperature guideline to identify any temperature events associated with the received data; normalizing the received data based on any temperature events associated with the received data; and converting the normalized data into a signature representative of the EMR detected by the plurality of sensors.
1. An apparatus for measuring liquid volume in a drug container, comprising:
at least one light source disposed and configured to emit electromagnetic radiation toward the drug container;
a plurality of sensors optically coupleable to the at least one light source, each sensor of the plurality of sensors disposed and configured to detect a portion of the electromagnetic radiation emitted by the at least one light source;
one or more temperature sensors disposed and configured to measure at least one temperature associated with a liquid in the drug container; and
at least one processor configured to receive data representative of the portion of the detected electromagnetic radiation from each of the plurality of sensors and the at least one measured temperature from the one or more temperature sensors, the at least one processor operable to:
convert the data into a signal signature including a plurality of values representative of the electromagnetic radiation detected by each sensor from the plurality of sensors, and
correct the signal signature based on the at least one measured temperature and one or more of a calibration temperature and background electromagnetic radiation, in which both the at least one measured temperature, and the one or more of the calibration temperature and the background electromagnetic radiation are used in determining one or more adjustments for the plurality of values of the signal signature.
2. The apparatus of claim 1 ,
wherein the at least one processor is further configured to receive, from the plurality of sensors, data representative of the background electromagnetic radiation detected by the plurality of sensors with the at least one light source in a dark state,
wherein the signal signature is corrected based on the at least one measured temperature and the background electromagnetic radiation.
3. The apparatus of claim 2 , wherein the at least one processor operable to:
convert the data representative of the background electromagnetic radiation into a background signature,
wherein the correction of the signal signature includes comparing the signal signature with the background signature, and
wherein the one or more adjustments for the plurality of values of the signal signature includes removing the background signature from the signal signature.
4. The apparatus of claim 1 , wherein
the at least one processor is configured to receive, from an independent temperature sensor of an external system, an external calibration temperature, the at least one processor operable to:
determine an offset that is a difference between the external calibration temperature and an internal temperature measured by the one or more temperature sensors,
adjust the at least one measured temperature by the offset,
wherein the signal signature is corrected based on the at least one measured temperature adjusted by the offset, and
wherein the one or more adjustments for the plurality of values of the signal signature includes the adjusting of the at least one measured temperature by the offset.
5. The apparatus of claim 4 , further comprising a communication interface configured to communicate with the external system, the at least one processor configured to receive the calibration temperature from the external system via the communication interface.
6. The apparatus of claim 1 ,
wherein the at least one processor operable to compare the at least one measured temperature to at least one temperature guideline to identify any temperature events associated with the received data,
wherein the correction of the signal signature is based on any temperature events associated with the received data and the one or more of the calibration temperature and the background electromagnetic radiation.
7. The apparatus of claim 6 , wherein the temperature event is at least one of a relationship and a difference between the at least one measured temperature and the at least one temperature guideline.
8. The apparatus of claim 6 , wherein the temperature guideline is specific to at least one of the apparatus, the drug container, and the liquid.
9. The apparatus of claim 1 , wherein the correction of the signal signature includes correcting the data representative of the electromagnetic radiation as detected by the plurality of sensors based on the at least one measured temperature, and the data corrected by the at least one measured temperature is converted into the signal signature.
10. The apparatus of claim 1 , wherein the at least one processor is configured to compare the signal signature as corrected to a plurality of reference signatures to determine a volume of the liquid in the drug container.
11. A method, comprising:
causing at least one light source to emit electromagnetic radiation toward a drug container;
detecting the emitted electromagnetic radiation through the drug container with a plurality of sensors;
measuring at least one temperature associated with a liquid in the drug container with a temperature sensor;
converting data from the plurality of sensors into a signal signature including a plurality of values representative of the electromagnetic radiation detected by each sensor from the plurality of sensors; and
correcting the signal signature based on the at least one measured temperature and one or more of a calibration temperature and background electromagnetic radiation, in which the correcting of the signal signature includes using both the at least one measured temperature, and the one or more of the calibration temperature and the background electromagnetic radiation in determining one or more adjustments for the plurality of values of the signal signature.
12. The method of claim 11 , further comprising:
detecting the background electromagnetic radiation with the at least one light source in a dark state with the plurality of sensors,
wherein the correcting of the signal signature is based on the at least one measured temperature and data representative of the background electromagnetic radiation detected by the plurality of sensors.
13. The method of claim 12 , further comprising:
converting the data representative of the background electromagnetic radiation into a background signature representative of the background electromagnetic radiation detected by each of the plurality of sensors,
wherein the correcting of the signal signature includes comparing the signal signature with the background signature, and
wherein the one or more adjustments for the plurality of values of the signal signature includes removing the background signature from the signal signature.
14. The method of claim 11 , further comprising:
detecting, with an independent temperature sensor of an external system, an external calibration temperature;
determine an offset that is a difference between the external calibration temperature and an internal temperature measured by the one or more temperature sensors;
adjusting the at least one measured temperature by the offset,
wherein the correcting of the signal signature is based on the at least one measured temperature adjusted by the offset, and
wherein the one or more adjustments for the plurality of values of the signal signature include the adjusting of the at least one measured temperature by the offset.
15. The method of claim 11 , further comprising:
comparing the at least one measured temperature to a temperature guideline to identify any temperature events associated with the received data,
wherein the correcting of the signal signature is based on the temperature events identified and the one or more of the calibration temperature and the background electromagnetic radiation.
16. The method of claim 11 , wherein the correcting of the signal signature includes correcting the data representative of the electromagnetic radiation based on both the at least one measured temperature, and one or more of a calibration temperature and background electromagnetic radiation, in which the data representative of the electromagnetic radiation as corrected is converted into the signal signature.
17. The method of claim 11 , further comprising:
comparing the signal signature as corrected to a plurality of reference signatures to determine the volume of the liquid in the drug container.
18. A health management system, comprising:
a drug delivery device including a drug reservoir; and
a dose measurement system configured to be removably coupleable to the drug delivery device, the dose measurement system including:
at least one light source disposed and configured to emit electromagnetic radiation toward the drug reservoir,
a plurality of sensors optically coupleable to the light source, each sensor of the plurality of sensors disposed and configured to detect a portion of the electromagnetic radiation emitted by the at least one light source;
one or more temperature sensors disposed and configured to measure at least one temperature associated with a liquid in the drug delivery device; and
at least one processor configured to receive data representative of the portion of the detected electromagnetic radiation from each of the plurality of sensors and the at least one measured temperature from the one or more temperature sensors, the at least one processor operable to:
convert the data into a signal signature including a plurality of values representative of the electromagnetic radiation detected by each sensor from the plurality of sensors, and
correct the signal signature based on the at least one measured temperature and one or more of a calibration temperature and background electromagnetic radiation, in which both the at least one measured temperature, and the one or more of the calibration temperature and the background electromagnetic radiation are used in determining one or more adjustments for the plurality of values of the signal signature, and the signature signal as corrected being representative of a volume of the liquid remaining in the drug reservoir.
19. The system of claim 18 , wherein the at least one processor is operable to compare the signal signature as corrected to a plurality of reference signatures to determine the volume of the liquid in the drug container, and the dose measurement system includes a display configured to present information to a user indicative of the volume of liquid remaining in the drug reservoir.