Activity monitoring

• US 7,845,228 B2
• Filed: 11/21/2003
• Issued: 12/07/2010
• Est. Priority Date: 12/10/2002
• Status: Active Grant

• Current Assignee: Koninklijke Philips Electronics N.V. (Koninklijke Philips N.V.)
• Original Assignee: Koninklijke Philips Electronics N.V. (Koninklijke Philips N.V.)
• Inventors: Mimnagh-Kelleher, Gillian Antoinette, Bremer, Joannes Gregorius, Verhoeven, Wilhelmus Lambertus Marinus Cornelius, Dunias, Paraskevas, Rommers, Adrianus Petrus Johanna Maria
• Primary Examiner(s): Williams; Hezron
• Assistant Examiner(s): Shah; Samir M
• Application Number:
  US10/537,878
• Publication Number:
  US 20060075816A1
• Time in Patent Office: 2,573 Days
• Field of Search: 735/10, 735/143.4, 738/651, 738/653, 73/10.1, 235/116, 600/595
• US Class Current: 73/510
• CPC Class Codes: A61B 2560/0209 adapted for power saving
• CPC Class Codes: A61B 2562/0219 Inertial sensors, e.g. accelerometers, gyroscopes, tilt switches
• CPC Class Codes: A61B 5/1118 Determining activity level

Abstract

An activity monitor is provided that reduces the amount of power consumed during a monitoring operation.

Claims

1. An activity monitor comprising:

a measurement unit including a plurality of motion sensors operable to produce respective sensor signals indicative of motion experienced thereby; and

a processor operable to receive the sensor signals from the measurement unit and to process the sensor signals in accordance with a predetermined method,

characterized in that the activity monitor is operable to monitor and process the sensor signals discontinuously in time and the processor is operable to monitor the sensor signals in turn.

2. An activity monitor as claimed in claim 1, wherein the measurement unit is operable to output the sensor signals discontinuously in time.

3. An activity monitor as claimed in claim 1, wherein the processor is operable to monitor the sensor signals discontinuously in time.

4. An activity monitor as claimed in claim 1, wherein the processor is operable to enter a monitoring mode of operation in which the processor monitors the sensor signals and to enter a standby mode of operation in which no monitoring takes place.

5. An activity monitor as claimed in claim 4, wherein the processor is operable to enter the monitoring mode and the standby mode alternately.

6. An activity monitor as claimed in claim 5, wherein respective time periods for the monitoring and standby modes are variable.

7. An activity monitor as claimed in claim 5, wherein respective time periods for the monitoring and standby modes are fixed.

8. A method of monitoring activity using a plurality of motion sensors which are operable to produce respective sensor signals indicative of motion experienced thereby, the method comprising receiving the sensor signals and processing the sensor signals in accordance with a predetermined method, characterized in that the sensor signals are monitored and processed discontinuously in time and the sensor signals are monitored in turn.

9. A method as claimed in claim 8, comprising alternately monitoring the sensor signals and operating in a standby mode, in which no monitoring takes place, for respective time periods.

10. A method as claimed in claim 9, wherein the respective time periods are variable.

11. A method as claimed in claim 9, wherein the respective time periods are fixed.