STATE DETERMINING DEVICE AND STATE DETERMINATION METHOD

• US 20120289867A1
• Filed: 05/02/2012
• Published: 11/15/2012
• Est. Priority Date: 05/12/2011
• Status: Abandoned Application

• Current Assignee: Fujitsu Limited
• Original Assignee: Fujitsu Limited
• Inventors: KASAMA, KOUICHIROU
• Application Number:
  US13/462,703
• Publication Number:
  US 20120289867A1
• Time in Patent Office: Days
• US Class Current: 600/595
• CPC Class Codes: A61B 2562/0204 Acoustic sensors
• CPC Class Codes: A61B 2562/0238 Optical sensor arrangements for performing transmission measurements on body tissue
• CPC Class Codes: A61B 5/0059 using light, e.g. diagnosis by transillumination, diascopy, fluorescence A61B5/0093, A61B5/1455, A61B5/02416 and A61B5/0261 take precedence
• CPC Class Codes: A61B 5/11 Measuring movement of the entire body or parts thereof, e.g. head or hand tremor, mobility of a limb for measuring pulse A61B5/02 ;A61B5/1038 takes precedence; motion detection to correct for motion artifacts in physiological signals A61B5/721
• CPC Class Codes: A61B 5/4809 Sleep detection, i.e. determining whether a subject is asleep or not
• CPC Class Codes: A61B 5/6887 mounted on external non-worn devices, e.g. non-medical devices
• CPC Class Codes: A61B 8/08 Detecting organic movements or changes, e.g. tumours, cysts, swellings A61B8/02 - A61B8/06 take precedence

Abstract

A state determining device includes a sensor and a processor. The sensor of the state determining device detects body motions of a test subject without physical contact. The processor of the state determining device determines whether the test subject is asleep or awake based on numbers of body motions detected for predetermined time periods.

Claims

1. A state determining device comprising:

a sensor to detect body motions of a test subject without physical contact; and

a processor to determine whether the test subject is asleep or awake based on numbers of body motions detected for predetermined time periods.

2. The state determining device according to claim 1, wherein

the processor calculates a state determination value that is an index of the determination, based on a first number of body motions detected for a first predetermined time period before a reference time and a second number of body motions detected for a second predetermined time period after the reference time, the reference time being a time for which the determination is made, and

the processor determines whether the test subject is asleep or awake based on a result of comparing the state determination value with a predetermined threshold value.

3. A state determination method executed by a state determining device including a sensor and a processor, the state determination method comprising:

detecting, by the sensor, body motions of a test subject without physical contact; and

determining, by the processor, whether the test subject is asleep or awake based on numbers of body motions detected for predetermined time periods.