Atsutoshi Ikeda(1), Yasuyuki Otoda(2), Etsuko Ueda(2), Takayuki Nakamura(3)

and Tsukasa Ogasawara(1)

(1) Nara Institute of Science and Technology(2) National Institute of Technology

(3) Wakayama University

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There is a need to prevent elderly patients from turning over and falling off their beds

When elderly patients try to leave from their beds, there are a lot of chance to get serious physical injuries

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Low-costEasy operationSafety and cleanHigh reliability

Magnetic type sensor Pressure sensor

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We propose low-cost and highly reliable patient monitoring device, MIMAMORI device, that monitors patient state in the bed

Device design concepts- Simple and economical hardware

- Component-oriented software

- Open-source

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(1) Xtion LIVE PRO

(3) Patient status LED

(4) System status LED

(5) Power switch

(6) Start switch

(7) Reset switch

(2) Raspberry Pi

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Open RTM implementation

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2 2 2 2

2 2 2 2 3

N=0

N=2

N=1

Capture depth image

Bed area extraction using the projective transformation matrix

Calculation of HLAC future

State classification by SVM SafeDangerous

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150

MIMAMORI device

60100

Subject: 1(170cm, 60kg)

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Safe state Dangerous state

Lying in the bed

Sitting on the bed

Moving out from the bed

Leaning against the fence

Training: 2003, Variation: 2672

Training: 2004, Variation: 2837

Training: 2005, Variation: 3476

Training: 2004, Variation: 3492

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Safe state Dangerous state

Lying in the bed

Sitting on the bed

Moving out from the bed

Leaning against the fence

Training: 2003, Variation: 2672

Training: 2004, Variation: 2837

Training: 2005, Variation: 3476

Training: 2004, Variation: 3492

Actual state

Safe Dangerous

Result

Safe 93.5% 6.5%

Dangerous 4.8% 95.2%

FNR

FPR

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http://robotics.naist.jp/~atsutoshi-i/mimamori/

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We are proposing low-cost and highly reliable patient monitoring device

Device design concepts - Simple and economical hardware

- Component-oriented software

- Open-source

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