# US 9,433,377 B2 · Sleep state management device, sleep state management method, and sleep state management program

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- Number: US 9,433,377 B2
- Document ID: US9433377B2
- Status: Granted
- Kind: B2
- Application number: 14/388,120
- Filed: 2012-11-12
- Published: 2015-01-29
- Granted: 2016-09-06
- Earliest claimed: 2012-03-26
- Assignees: Omron Healthcare Co., Ltd.
- Applicants: OMRON HEALTHCARE Co., Ltd.
- Inventors: Hiroaki Aoyama; Teppei Sumino; Atsushi Sone; Hiroya Nakanishi; Takeshi Kubo
- Web page: https://patentgrep.com/patent/US9433377B2

## CPC

- A61B 5/4812: {Detecting sleep stages or cycles}
- A61B 5/11: Measuring movement of the entire body or parts thereof, e.g. head or hand tremor or mobility of a limb {(A61B5/1038 takes precedence; motion detection to correct for motion artifacts in physiological signals A61B5/721)}
- A61B 5/4815: {Sleep quality}
- A61B 5/6892: {Mats}
- A61B 5/7275: {Determining trends in physiological measurement data; Predicting development of a medical condition based on physiological measurements, e.g. determining a risk factor}
- G01H 1/00: Measuring {characteristics of} vibrations in solids by using direct conduction to the detector (G01H9/00, G01H11/00 take precedence)
- G01P 15/00: Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration
- G08B 21/06: indicating a condition of sleep, e.g. anti-dozing alarms
- A61B 2562/0219: Inertial sensors, e.g. accelerometers, gyroscopes, tilt switches
- A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D)
- G01H: MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01P: MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT (measuring or recording blood flow A61B5/02, A61B8/06; monitoring speed or deceleration of electrically-propelled vehicles B60L3/00; vehicle lighting systems adapted to indicate speed B60Q1/54; determining position or course in navigation, measuring ground distance in geodesy or surveying G01C; combined measuring devices for measuring two or more variables of movement G01C23/00; measuring velocity of sound G01H; measuring velocity of light G01J7/00; measuring direction or velocity of solid objects by reception or emission of radiowaves or other waves and based on propagation effects, e.g. Doppler effect, propagation time, direction of propagation, G01S; measuring speed of nuclear radiation G01T; measuring acceleration of gravity G01V; {measuring or recording the speed of trains B61L23/00; speed indicators incorporated in motor vehicles B60K35/00; measuring frequency or phase G01R; traffic control G08G})
- G08B: SIGNALLING SYSTEMS, e.g. PERSONAL CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS

## Abstract

A sleep state management device includes a sensor that detects movement in bedding where a measurement subject is sleeping, and a control unit that calculates a peak value difference, which is a difference between adjacent peak values in a detection signal outputted from the sensor, determines that a period in which a number of times the peak value difference exceeds a threshold is greater than a predetermined value is a period in which the measurement subject has moved, and manages the sleep state of the measurement based on a result of the determination.

## Claims

### Claim 1

A sleep state management method comprising:
a peak value difference calculation step of calculating a peak value difference that is a difference between adjacent peak values in a detection signal outputted from a sensor unit that detects vibration of a bed in which a measurement subject is sleeping;
a first body movement determination step of determining that a period in which a number of times the peak value difference exceeds a threshold is greater than a predetermined value is a period in which the sensor unit has detected vibration, said period including a plurality of unit segment periods;
a sleep state recording step of recording the sleep state of the measurement subject using a result of the determination made in the first body movement determination step;
a maximum/minimum difference calculation step of finding a maximum/minimum difference that is a difference between a maximum value and a minimum value in the detection signal in each unit segment period; and
a second body movement determination step of determining that the unit segment period in which the maximum/minimum difference exceeds a second threshold is a segment period in which the measurement subject's body has moved,
wherein the sleep state recording step further comprises recording the sleep state of the measurement subject using a result of the second body movement determination step.

### Claim 2 (depends on 1)

A sleep state management program stored on a non-transitory computer-readable medium for causing a computer to execute the steps of the sleep state management method according to claim 1.