Method and apparatus for reducing sensor power dissipation

Patent metadata

Field	Value
Publication number	US-10866096-B2
Application number	US-201916710221-A
Country	US
Kind code	B2
Filing date	Dec 11, 2019
Priority date	May 17, 2016
Publication date	Dec 15, 2020
Grant date	Dec 15, 2020

Abstract

A sensor produces the sensor data for a sensor data consumer. A device receives a sensor profile of the sensor indicating a relationship between a sensor parameter operating range and a deviation of the sensor data as a result of scaling one or more sensor parameters. The device receives a tolerance profile of the sensor data consumer indicating a tolerable degree of deviation of the sensor data and scales a parameter of the sensor according to the tolerance profile. The scaling reduces a power dissipation level of the sensor.

First claim

What is claimed is:

1. A device in communication with a sensor configured to produce sensor data and provide sensor data to a sensor data consumer, the device in communication with the sensor via a sensor driver in communication with the sensor and configured to receive the sensor data and/or to control operation of the sensor, the device comprising:
a processor and a memory configured to store non-transient instructions, which when executed by the processor performs the steps of:
receiving a sensor profile of the sensor indicating relationship between a sensor parameter operating range and a resulting deviation of the sensor data;
receiving a tolerance profile of the sensor data consumer indicating a tolerable degree of deviation of the sensor data; and
scaling a parameter of the sensor according to the tolerance profile,

wherein said scaling reduces a power dissipation level of the sensor, and wherein said deviation comprises a difference between data output by the sensor with and without scaling the parameter.

2. The device of claim 1 , wherein the tolerance profile comprises one of the group consisting of a latency tolerance, a loss or throughput tolerance, an offset value, and a value deviation tolerance.

3. The device of claim 1 , wherein scaling the parameter of the sensor further comprises changing a timing of when the sensor produces sensor data.

4. The device of claim 1 , further comprising an operating system operating in conjunction with the sensor driver.

5. The device of claim 1 , wherein the device is configured to access the sensor data.

6. The device of claim 5 , wherein the processor further performs the steps of defining the tolerance profile and/or the sensor profile.

7. The device of claim 6 , wherein the device is configured to define the tolerance profile based at least partially on needs of the sensor data consumer and/or the sensor profile.

8. The device of claim 6 , wherein the parameter comprises a bit granularity of digital data reported by the sensor.

9. The device of claim 6 , wherein the parameter comprises a data smoothing/averaging parameter.

10. A device in communication with a sensor power supply for a sensor configured to produce sensor data and provide sensor data to a sensor data consumer, the device comprising:
a processor and a memory configured to store non-transient instructions, which when executed by the processor performs the steps of:
receiving a sensor profile of the sensor indicating relationship between a sensor parameter operating range and a resulting deviation of the sensor data;
receiving a tolerance profile of the sensor data consumer indicating a tolerable degree of deviation of the sensor data; and
scaling a parameter of the sensor power supply according to the tolerance profile,

wherein said scaling reduces a power dissipation level of the sensor, and wherein said deviation comprises a difference between data output by the sensor with and without scaling the parameter.

11. The system of claim 10 , wherein scaling the parameter of the sensor power supply comprises changing a voltage level provided to the sensor.

12. The system of claim 10 , wherein scaling the parameter of the sensor power supply comprises changing a current level provided to the sensor.

13. The system of claim 10 , further comprising the step of determining a tolerable degree of deviation in the sensor data resulting from changing the power parameter of the sensor power supply.

14. The system of claim 13 , wherein an amount of the scaling of the parameter of the sensor power supply is informed by the tolerable degree of deviation in the sensor data.

Assignees

• Massachusetts Inst Technology

Inventors

• Stanley-Marbell Phillip
• Rinard Martin C

Classifications

• A61B5/112 Primary

  Gait analysis · CPC title

• A61B2560/0209

  adapted for power saving · CPC title

• A61B5/00

  Measuring for diagnostic purposes (radiation diagnosis A61B6/00; diagnosis by ultrasonic, sonic or infrasonic waves A61B8/00); Identification of persons · CPC title

• A61B2562/0219

  Inertial sensors, e.g. accelerometers, gyroscopes, tilt switches · CPC title

• A61B5/1123

  Discriminating type of movement, e.g. walking or running (A61B5/1116, A61B5/112 take precedence) · CPC title