LIFE2014 2014 ¸ 9 ã 24 ÚŤ26 Ú üńGS8-2/*)'#

514!56%2

Estimating Babies’ Awakening-time at Night Improving Childcare Support ŋĀĭ¤š%çê¢Ţ  lĮĈśš%çê¢Ţ  ĮŊœYš%çê¢Ţ
Rina KANAZAWA, Future University HAKODATE
Ikuma Sato, Future University HAKODATE
Yuichi FUJINO, Future University HAKODATE
Abstract: Recently, a childcare environment has been changing due to increase in the number of nuclear family. Therefore, mothers
have to take care their child by only themselves. We focused on a babies crying at night. We believe it is possible to estimate a baby'scrying and awakening-time at night by changing his/her sleep rhythm. We propose a method of reducing a mother's stress by informing
her of her baby's sleeping rhythm and awakening-time at night. We tried to estimate babies’ awakening-times and sleep rhythms at nightby using sensors. We conducted three experiments to detect babies' sleep rhythms through the cooperation of young parents. We
confirmed the presence of body movements, awakening and crying at night by using video and the sensor-mat data. We analyzed thedata and detected breathing rates, heart rates and body movements by fast Fourier transform and digital filtering. We also classified
active and quiet sleep based on body movements. This study showed that a baby's sleeping condition at night could be evaluated bydetecting the breathing, heart rate and body movements. We were able to detect babies’ breathing rates with or without bodymovements; however, their breathing rates did not change before or after the awakening. We estimated the babies’ awakening-times
after a few sleep cycles, which shortened sleep just before awakening.

Key Words: Childcare Support, Sleep Rhythm of Baby’s, Night Crying, Awakening, Sleep Sensor
1. 0"§Ĩ51ôĵ$§Ĩ# 1]©-?
FT?5Ì1ťh%ţ£¦$_ĵ ² -ŀÊg "!#.0ţ§Ĩ$fØ$ĤË§!,5Ř  21"!§Ĩ# 21dŀ #ť ţeÚ%í­ÙŃ*ţôĵ% 1d§Ĩ51Á"ąø "1ť$ģëţ
ôĵ%ĨxH8UXB "1 0âÆ$#%§!,5į¾)co,21ť è%ax$¡ŎĴňÞŎ$Ñª#ŏĆ)$ģë#ł&1ť
2. *)ôĵ%~+$§Ĩ# ţax$ĴňÞŎ5bÿ "ť ţĝ 2 §ţĝ 3 §#"1 ĢŜ#.0ax$¡ŎĴňÞŎ51ěºbÿ 1 21ť.
ţ~+§Ĩ51ôĵ# / +ax
¡Ŏ#Ĵň1ÞŎ5ē1cĽÍ$Ŀþ#"1 ħ1ť
ax$Ēđ5ĹŌ1Œ#ţð"AV=51 Ē
đ5Ő¬1ĩÄ-ôĵ#ĠęĎ"ĽÍ5^)
ĩÄ 1ťax$Ēđ5ăÏé"AV=#.0ķÿĕĜ-¡Ŏ$ĴňÞŎ5ÑªĕĜ%Ĳ/2"ťYØţďĳĖĻ#.0ax$Ēđ5ĹŌĒđR@O5
ĳ 1ĕĜ 1)2) 1ť2%ôĵ#ĽÍ5 1" òĖ#ĹŌ "ĩÄ 1ťţax$Ē
đ5ăÏé"AV=#.0Ĭķÿţ¡Ŏ$ĴňÞŎ5Ñª1
ôĵ$ĨxÔÓ#ä1 ħ1ť
èĕĜ%ţax$Ēđ5ăÏé#ĹŌ1Øù5ÒîţÕţĪÎÕ$ -m#.1Ēđ$}Ś#.0ţ¡Ŏ$ĴňÞŎ#ïĸ1ť
3. &  ,+ ¢d%ýĒđÞ#Õ þ±1ťax,ð
1 ħţÕ$
ĒđąÈ$ #ïĸ1ť)ţĪÎ,ð1 ħ1ť/#ţ¢d%GS8-2-1HVTOĒđ$¥)0 /TOĒđ$ġ40 1 $Ēđæ0ţ . 90 }Y¡# 45 ĥ0Ł21 3)
2 0ţ$R@O5ïĸ¯ļ 1ť
 ax$Ēđ%ţĒđţŕĒđ#}Ś21 4)ť2%ţ
TOĒđţHVTOĒđ$0ţīú$ņ#.0}Ś21ťĒđ ŕĒđ#%īúh#,m"!$ĄÂ 1ť2/#.0ţīú5ķÿĒđ ŕĒđ$}Ś ĩ1 ħ1ťax$Ēđæ,¢d ð#ţŕĒđ$¥)0 /Ēđ$ġ405
1  1ť×Ĉx 4050 }ţ3 Wãhő 5060 }
1 21 4)ť 7 -m /ax$Ēđ5ķÿ1Ă#ţCGCĘı
$ sleepscan AV=NDF5nĉťèAV=NDF#%ţĠıö y 0ţN8<UM9VAV=#.
0Ð5ķÿ1ťèAV=NDF%ţ¯ļ 10 óh[ "1 bv«Ŝ"! /ax$EXC,Áĩ1 ħť)ţax$¡Ŏ$ąÈ5ĖĻ1+#ţßĳñĩ$KE:;PQĹŌ5İť «Ŝ%ţax$¶$\#AV=NDF5Ö ţax$ř ĖĻ 1kĦ#KE:;PQ5ĺĦť1ċ
$§ $_ĵ#ŗ ţĈ¿ 3 Wãţ4 Wãţ7
Wã$ķ 3 $«Ŝ5İť ÕţĪÎÕ5÷+1+#ţE>CSM7SCX5
ĺķťax$Õ%ţ1 }Ŏ# 2545 1/;DF:MúÕ5 0.3Hz ťð#ţĪÎÕ%1 }Ŏ# 80160 1/ţ;DF:MúÕ51.3Hz
ťÕţĪÎÕ5÷+1+#22M
7SCX{ć¿# FFT 5İť)ţax$ĪÎÕ
5ĖĻ1+#ţğÝAV=#.0ax$ĪÎÕ5ķÿť ĈEXC5 FFT {ćģë KE:EXC5Ķ®ģë#.0ţFFT #.0Á/2¼º 70 h[$m1ţ2h\5m "ąÈ ťm 1ąÈ5Ēđţm "ąÈ5ŕĒđ }ŚťLIFE2014 2014 ¸ 9 ã 24 ÚŤ26 Ú üńï|Õ% 20 #ŀt ť2%ţĒđÞ$+Õ þ± ħ1ť.ţI8J?M7
SCX FFT #.0Õ5÷+1c   ħ1ťm "ąÈ%ţ©ªúÕ5ï|ť ţm 1ąÈ%ţúÕ$ 0ţ2%m5 #.0   ħ1ť3 }$«Ŝ
EXC#.0ax$Éō#j&$ąÈ# ©ªúÕ5ï| ť2%ţax$mŉ +1 Ñª1ť
ĪÎÕ#%ţ3 ď$«ŜEXC$*ax$ĪÎÕ ð$Õ "1úÕ5ï|ť3 ď$EXC$*ï|  #%ţĪÎ%-m.0,°+ţax$mŉ 1ěº#"/" ï|"$%"Ã421ť
Ĵň$Õ$ #%ţÜĖ" %Ĳ/2" ť)ţĪÎ#%ţï|1|ê
3 ď$«Ŝ%¡Ŏ$Ĵň ľ/Ĵň$ #ïĸ1|ê" ť
ĈEXC5 FFT {ćģë$¼º#.0ţm$äă
/Ēđ5}Śť 2 # Ĵň$#ōĒđæ Ĕ " Ĵň ľ1c } ť 2 ď$«Ŝ$ģë,ð$w Ĳ/2ť)ţ¡û" 3 ď$«Ŝ%ţĒđæ !6!6ō "w Ĳ/2ť)ţ3 ď$«Ŝ%ţĒđæõ$µ ° ť2/$ģë#.0ţĒđæ 1Yª$ō.0Ĕ  "1 Ĵň#ŏp1 ħ
/21ť

4. -$
AV=NDF$ĈEXC5;DF:MúÕ 0.3Hz $I
8J?M7SCX
FFT # . 0 { ć    3 ţ
0.33~0.75Hz $úÕ·LX<5ï|ť 1 #ţ Y¡}$ĈEXC5 32 Ěõ#}{ćģë5ėť
2#.0ţ1 }Ŏ# 2045  "1ax$Õ#ŀĄÂúÕ5ï|ťï|t$ 94ť4Š 2045 "1úÕ$Ğťð#ţ2 ď$«Ŝţ3 ď$«Ŝ# , 90Šh[ ax$Õ#ŀúÕ·LX<5ï|ťð#ţY¡$ĈEXC5;DF:MúÕ 1.2Hz $I
8J?M7SCX FFT #.0{ćť 3 ď$«Ŝģë$*ţ&$ąÈ# ax$ĪÎÕ#ŀ 70~120 "1úÕ5ï|ťï|'(&$t
1.17~2.67Hz $úÕ·Ĳ/2ť)ţSPO2 #.0ax$ĪÎ 72122 ť2/#.0ţï|t ĪÎÕ1 5ĖĻť
ĈEXC# FFT 5İģë$¼º /ĒđţŕĒđ5}ŚťŕĒđ$¥)0 /Ēđ$ġ40)5 1
$Ēđæ ť 2 %ţ«Ŝ 1 $Ēđæ5ėť$ŞŇ} ţĒđţčŇ} ŕĒđ1ť 1ť«ŜŦď$I8J?M7SCX(0.3Hz)

FFT ģë

 2ť«Ŝ 1 ď$Ēđæ
5. .
m 1ąÈ-"ąÈ"!z$ąÈ 2045 "1úÕ5ï|ťax$Õ% 2545 0ţ

6. -3
ax$ĴňÞŎ5Ñª1+#ăÏé"AV=ND
F5nax$Õ ĪÎÕ5ï|ţm$äă5#Ēđ ŕĒđ5}Śťm 1ąÈ-"ąÈ"!Õ5ï| 
ţĴň$# %Ĳ/2" ťÀe$«Ŝ
%ţÕ$ #.ĴňÞŎ5Ñª1 %|ê" ť3 ď$«Ŝ# ĪÎÕ5ï|1  ţax ¡Ŏ#û " +ax$ĴňÞŎ ĪÎÕ$ŏp%ª|ê" ťe¿ţ  $ãş$ax$EXC-.0Çº$ŝAV=NDF5n
EXC5Ŕ+ť[Ĺģë5) +1 ţ  $ĔĒđæ$¿#ax Ĵň1 5ĖĻ +ţĒđæ5Õ1
 ĴňÞŎ5Ñª 1$%"
ħ1ťax¡Ŏ#û #ľ %ţĒđæ%å#ō"1c5ĖĻťĒđæ%ţsdµ#.1½Ŗ 
1 ħ1+ţ/#«Ŝ5İEXC5Ŕ+ť
.((1) ³ĊZÅ§, ā´Û`, ÚàĐţâŀ$ax$ĒđÞ
Ŏ$ãşĒđĴňR@O$ČŅ, °xquĕĜ,vol. 58, no. 5, pp. 592-598, 1999.
(2) Avi Sadeh, Activity-based assessment of sleep-wakepatterns during the 1st year of life, Infant Behavior andDevelopment, vol. 18, no. 3, pp329-337, 1995.
(3) Dement WC, Kleitman N, Cyclic variations in EEG sleepand their relation to eye movements, body motility, anddreaming, Electroencephal Clin Neurophysiol, vol.9,
pp.673-690, 1957(4) ÚèĒđ¨i, Ēđ¨,ì»iĘårá¹, vol.4, 2011

GS8-2-2