Power management for wearable devices
View Patent ↗Described herein are apparatuses and methods for power adjustments of user measurement device. In one apparatus, a processing element is coupled to a first sensor interface and a second sensor interface. The processing element measures a physiological measurement via the first sensor interface and measures an amount of activity of the apparatus via the second sensor interface. The processing element performs a power adjustment activity in view of the amount of activity. For example, the power adjustment activity may be to perform any one or more of the following: adjust a number of different physiological measurements to take; adjusting a frequency of taking physiological measurements; turning off one or more systems; adjusting a type, frequency, data rate, number of channels and/or power at which to communicate data.
1. A wearable user measurement device (UMD) comprising:
a plurality of sensors operable to take a first plurality of physiological measurements; and
a processor operatively coupled to the plurality of sensors, wherein the processor is to execute a sensor module to control the plurality of sensors and an power management module (PMM), wherein the PMM is operable to:
identify default configuration at which the sensor module takes the first plurality of physiological measurements with the plurality of sensors, the default configuration comprising a frequency of the first plurality of physiological measurement, a granularity of the first plurality of physiological measurement, and a power consumption level of different ones of the plurality of sensors, wherein the default configuration is a first combination of different frequencies, granularities, and power consumption for different ones of the plurality of sensors;
determine a physiological event based on the first plurality of physiological measurements;
determine a power consumption level of the wearable UMD and a first quality level of the first plurality of physiological measurements for the physiological event based on the default configuration;
determine a second configuration for at least one of the plurality of sensors using the determined amount of activity to reduce the power consumption level of the wearable UMD while maintaining a second quality level of a second plurality of physiological measurements for the physiological event that is substantially similar to the first quality level; and
instruct the sensor module to adjust the at least one of the plurality of sensors to the second configuration for the second plurality of physiological measurements.
2. The wearable UMD of claim 1 , wherein the PMM is further operable to calculate a rate of change of at least two of the of the first plurality of physiological measurements in a period of time to determine the power consumption level of the wearable UMD.
3. The wearable UMD of claim 1 , wherein the second configuration causes the wearable UMD to measure the second plurality of physiological measurements at a higher fidelity than the first plurality of physiological measurements.
4. The wearable UMD of claim 1 , wherein the second configuration is a second combination of frequencies, granularities, and power consumption levels for different ones of the plurality of sensors than the first configuration.
5. The wearable UMD of claim 1 , wherein the plurality of sensors comprises a first sensor to measure a first type of physiological measurement and a second sensor to measure a second type of physiological measurement, wherein the PMM is operable to determine the power consumption level based at least in part on the first type of physiological measurement and the second type of physiological measurement.
6. The wearable UMD of claim 5 , wherein the first sensor is an accelerometer, a gyroscope, a magnetometer, a global position system (GPS) sensor, or a geomagnetic field sensor.
7. The wearable UMD of claim 1 , wherein the plurality of sensors comprises two or more of sensors from the following types of sensors: a physiological sensor, an environmental sensor, and a Newtonian sensor.
8. The wearable UMD of claim 1 , wherein the plurality of sensors comprises two or more of sensors from the following types of sensors: a pulse oximeter sensor, an electrocardiography (ECG) sensor, a fluid level sensor, an oxygen saturation sensor, a body temperature sensor, an ambient temperature sensor, a plethysmograph sensor, a respiration sensor, a breath sensor, a cardiac sensor, a heartrate sensor, an impedance sensor, an optical sensor, a spectrographic sensor, a humidity sensor, an ambient temperature sensor, an altitude sensor, a barometer, a global positioning system (GPS) sensor, a triangulation sensor, a location sensor, a gyroscope sensor, a vibration sensor, an accelerometer sensor, a three dimensional (3D) accelerometer sensor, a force sensor, a pedometer, a strain gauge, a magnetometer, and a geomagnetic field sensor.
9. The wearable UMD of claim 1 , wherein the first plurality of physiological measurements comprises two or more measurements of the following types of measurements: a hydration level measurement, a heart rate measurement, a blood pressure measurement, an oxygen level measurement, and a temperature measurement.