୍⯡㈈ᅋἲே᪂₲┴ᘓタᢏ⾡ࢭࣥࢱ࣮ ◊✲ຓᡂ஦ᴗሗ ࿌ ᭩ᖹᡂ  ᖺ  ᭶᪂₲኱Ꮫ⮬↛⛉Ꮫ⣔㸦㎰Ꮫ㒊㸧㕥ᮌဴஓ㸬ᴫせᮏሗ࿌᭩ࡣ㸪୍⯡㈈ᅋἲே᪂₲┴ᘓタᢏ⾡ࢭࣥࢱ࣮ᖹᡂ  ᖺᗘ◊✲ຓᡂ஦ᴗ࡟ಀࢃࡿ◊✲ᡂᯝࢆྲྀࡾࡲ࡜ࡵࡓࡶࡢ࡛࠶ࡿ㸬 ⏦ㄳㄢ㢟ྡᙎᛶἼィ ࢆ᥼⏝ࡋࡓ㓄⟶᪋タࡢ㠀◚ቯᦆയ᳨ฟἲࡢ㛤Ⓨ㹼㛗ᮇ౪⏝ୗࡢୖୗỈ㐨᪋タࢆᑐ㇟࡜ࡋ࡚㹼 ⏦ㄳ⪅᪂₲኱Ꮫ⮬↛⛉Ꮫ⣔㸦㎰Ꮫ㒊㸧 ෸ᩍᤵ 㕥ᮌဴஓ ◊✲┠ⓗୖỈ㐨ࡸୗỈ㐨࡟௦⾲ࡉࢀࡿ㓄⟶᪋タࡣ㸪♫఍ᇶ┙᪋タࡢ୰࡛ࡶ኱つᶍᆅ㟈࡟௦⾲ࡉࢀࡿ✺Ⓨⓗ⅏ᐖࡀⓎ⏕ࡋࡓ㝿࡟㐨㊰࡞࡝࡜ẚ㍑ࡋ࡚᚟ᪧ࡟ᅔ㞴ࡀక࠺ࠋᮏ⏦ㄳ࡛ࡣ㸪ୖୗỈ㐨᪋タࢆᑐ㇟࡟᪤Ꮡ᪋タ࠿ࡽⓎ⏕ࡍࡿᙎᛶἼࢆཷືⓗ࡟᳨ฟࡋ㸪⟶ෆ࡛Ⓨ⏕ࡍࡿࠕὶࢀሙࠖ࡜ࠕᮦᩱᦆയࠖࡢ㠀◚ቯィ ἲࢆᵓ⠏ࡍࡿࡇ࡜ࢆ┠ⓗ࡜ࡍࡿࠋᙎᛶἼィ࡟ࡣ㸪⏦ㄳ⪅ࡢ◊✲ᐇ⦼ࡢ࠶ࡿ AE㸦Acoustic Emission㸧ἲࢆ⏝࠸ࡿࠋࣔࢹࣝヨ㦂ࢆᐇ᪋ࡋࡓᚋ࡟బΏᆅᇦࡢ኱つᶍ᪋タ࡛ࡢᐇ⎔ቃୗ࡛ࡢィ ࢆ㏻ࡋ࡚㸪㛤Ⓨᢏ⾡ࡢ㧗ᗘ໬ࢆヨࡳࡿࠋ ◊✲ᡂᯝᮏ◊✲࡟㛵㐃ࡍࡿ◊✲ᡂᯝࢆ௨ୗ࡟ิᣲࡍࡿ㸬㸦㸧 ㄽᩥ1㸧 㕥ᮌဴஓ㸪ሷ㇂ᬛᇶ㸸AE ィ

࡟ᇶ࡙ࡃ㏦㓄Ỉࣃ࢖ࣉࣛ࢖ࣥࡢ㠀◚ቯࣔࢽࢱࣜࣥࢢἲ

ࡢ㛤Ⓨ㸪ᥖ㍕チྍ㸪2018.
㸦㸧 ཱྀ㢌Ⓨ⾲1㸧 㧗ᶫ೺୍㸪ᓥᮏ⏤㯞㸪㕥ᮌဴஓ㸸AE ࣃ࣓࣮ࣛࢱࢆ⏝࠸ࡓ኱つᶍ㏦Ỉࣃ࢖ࣉࣛ࢖ࣥࡢᅽຊἼఏᦙ≉ᛶࡢᐃ㔞ホ౯࡟㛵ࡍࡿ◊✲㸪➨ 45 ᅇᅵᮌᏛ఍㛵ᮾᨭ㒊ᢏ⾡◊✲Ⓨ⾲఍せ᪨㸪2018.
2㸧 㕥ᮌဴஓ㸪ᓥᮏ⏤㯞㸸AE ࣃ࣓࣮ࣛࢱゎᯒ࡟ᇶ࡙ࡃ኱つᶍ㏦㓄Ỉࣃ࢖ࣉࣛ࢖ࣥࡢᅽຊἼఏᦙ≉ᛶホ౯㹼⥭ᛴ㐽᩿ᘚࡢᛶ⬟ホ౯ࢆ஦౛࡟㹼㸪ᖹᡂ 29 ᖺᗘ JSNDI ➨ 2 ᅇ࢔ࢥ࣮ࢫࢸ࢕ࢵࢡ࣭࢚࣑ࢩࣙࣥ㒊㛛ㅮ₇఍㸪pp. 13-20㸪2017.
3㸧 ᮏ⏣૗኱㸪㕥ᮌဴஓ㸪୰㐩㞝㸪ᶡᒇၨஅ㸸AE ࣃ࣓࣮ࣛࢱࢆ⏝࠸ࡓࣃ࢖ࣉࣛ࢖ࣥࡢỈ⌮ᶵ⬟ホ౯࡟㛵ࡍࡿ◊✲㸪ᖹᡂ 29 ᖺᗘ㎰ᴗ㎰ᮧᕤᏛ఍ㅮ₇఍ㅮ₇せ᪨㞟㸪CD-R㸪2017.
4㸧 㕥ᮌဴஓ㸪ᓥᮏ⏤㯞㸪㧗ᶫ೺୍㸸㏦㓄Ỉࣃ࢖ࣉࣛ࢖ࣥ࡟Ⓨ⏕ࡉࡏࡓᅽຊἼࡢ AE ࣃ࣓࣮ࣛࢱ࡟ࡼࡿ᳨ฟ㸪➨ 21 ᅇ AE ⥲ྜࢥࣥࣇ࢓ࣞࣥࢫㄽᩥ㞟㸪pp. 17-20㸪2017.
㸬◊✲ᡂᯝ㸦ᴫせ㸧㸬ࡣࡌࡵ࡟
㏆ᖺ㸪♫఍ᇶ┙᪋タࡢ⥔ᣢ⟶⌮ศ㔝࡟࠾ࡅࡿᢏ⾡㛤Ⓨ࡛ࡣ ICT ࡸ IoT㸪AI ࡞࡝㸪᝟ሗᢏ⾡ࢆά⏝ࡋࡓ㠀◚ቯ᳨ᰝ⢭ᗘࡢྥୖࡀヨࡳࡽࢀ࡚࠸ࡿࠋ➹⪅ࡢ୍ே࡛࠶ࡿሷ㇂ࡽࡣ㸪㐨㊰ᶫᗋ∧ࡢຎ໬࣭ᦆ
യᶵᵓࡢゎ᫂࡜࡜ࡶ࡟㸪ࡑࢀࡽ࠿ࡽⓎ⏕ࡍࡿᙎᛶἼ ࢆ 㧗 ⢭ ᗘ ᳨࡛ ฟ ࡍ ࡿ᪂ ࡓ࡞ ࢭ ࣥ ࢧ ࢩ ࢫࢸ ࣒ᅗ ᐇ㦂࣭ィ᪋タ 11)

㸦Super Acoustic Sensor System㸧1)ࢆ㛤Ⓨࡍࡿ࡞࡝㸪㧗ᗘ࡞㠀◚ቯィᢏ⾡ࡢ◊✲㛤ⓎࢆάⓎ࡟㐍ࡵAE ࢭࣥࢧ࡚࠸ࡿࠋୖୗỈ㐨ࡸỈ฼᪋タ㛵㐃ศ㔝࡟࠾࠸࡚ࡶ୍౛࡜ࡋ࡚᳃ࡽ 2), 3)࡟ࡼࡿỈ㊰ࢺࣥࢿࣝࢆᑐ㇟࡜ࡋࡓኚ≧ㄪᰝࢩࢫࢸ࣒ࡢ㛤Ⓨࡸ࿘⸨ࡽ 4), 5)࡟ࡼࡿ
ࢥࣥࢡ࣮ࣜࢺỈ฼ᵓ㐀≀ࢆᑐ㇟࡟ࡋࡓ⌧఩⨨࡛ࡢືᙎᛶಀᩘホ౯ἲࡢ㛤Ⓨ࡞࡝ࡀ࠶ࡿࠋ
ᮏሗࡢᑐ㇟࡛࠶ࡿ㏦㓄Ỉࣃ࢖ࣉࣛ࢖࡛ࣥࡣ㸪₃Ỉࢆྵࡴ₃ὤ⌧㇟ 6)࡟ࡘ࠸࡚ᙎᛶἼࢆཷືⓗ࡟᳨ฟࡍࡿ AE㸦Acoustic Emission㸧ἲ 7)ࢆ⏝࠸ࡓ᳨ฟ࣭ᅗ 㓄⟶᪋タ࡬ࡢ AE ࢭࣥࢧタ⨨≧ἣ㸦ᆅⅬ A㸧ホ౯ࡢヨࡳࡀᩘከࡃ⾜ࢃࢀ࡚࠸ࡿ㸦౛࠼ࡤᩥ⊩8)㸧ࠋィᑐ㇟ࡢᵓ㐀ⓗ≉ᚩࡣ㸪ෆỈᅽࢆ᭷ຠ฼⏝ࡋࡓ㏦Ỉࢩࢫࢸ࣒ࡀᵓ⠏ࡉࢀ࡚࠸ࡿࡇ࡜࡟࠶ࡿࠋࡋ࠿ࡋ㸪ᙜึタィ࡜ࡣ␗࡞ࡿ฼⏝᮲௳ࡢሙྜ㸪᪤Ꮡ᪋タ࡛ࡣẼᾮ஧┦ὶࡸᅽຊἼࡀⓎ⏕ࡋ㸪ᨾ㞀ࡸ₃Ỉࡢཎᅉ࡜࡞ࡿࠋ➹⪅ࡽࡣ㸪AE ᣦᶆࢆ⏝࠸ࡓỈ⌮⌧㇟㉳※ᙎᛶἼࡢ≉ᛶホ౯࠿ࡽ㏦㓄Ỉࢩࢫࢸ࣒ࡢᏳ඲ᛶデ᩿ࢆヨࡳ࡚ࡁࡓ 9), 10), 11)ࠋ⌧ᅾ㸪ࡑࢀࡽࡢ◊✲ᡂᯝࢆ㋃ࡲ࠼࡚㸪᪂ࡓ࡞Ỉᐦᛶ⬟ホ౯ἲࢆᥦ᱌ࡋ࡚࠸ࡿ 12),13)ࠋ

ᅗ ↓⥺ AE ィᮏሗ࡛ࡣ㸪ຠᯝⓗ࠿ࡘຠ⋡ⓗ࡞㏦㓄Ỉࣃ࢖ࣉࣛ࢖ࣥࡢ⥔ᣢ⟶⌮ࢆ┠ⓗ࡟㸪➹⪅ࡽࡀ⌧ᅾ㛤Ⓨࡋ࡚࠸ࡿ↓⥺ AE ࢩࢫࢸ࣒࡟ࡼࡿ㏦Ỉࣃ࢖ࣉࣛ࢖ࣥ࡟Ⓨ⏕ࡉࡏࡓᅽຊἼࡢ㠀◚ቯィ⤖ᯝࢆ᝟ሗ㏻ಙᢏ

⾡࡛࠶ࡿ ICT ࡢほⅬ࠿ࡽ⪃ᐹࡍࡿࠋࡑࡢ⤖ᯝࢆ㋃
ࡲ࠼࡚㸪ࣃ࢖ࣉࣛ࢖ࣥ≧ែホ౯࡬ࡢ AE ἲࡢ㐺⏝࡜
ICT ά⏝ࡢ᭷⏝ᛶࢆ᫂ࡽ࠿࡟ࡍࡿࠋࢩࢫࢸ࣒ࡢᴫᛕᅗ

㸬 ↓⥺ $( ࢩࢫࢸ࣒࡟ࡼࡿᅽຊἼ᳨ฟ㸦㸧 ィィᑐ㇟᪋タᑐ㇟ࡣ㸪ࢩࢫࢸ࣒ࡀỈᵴ㹼༢୍⟶㊰㹼ࣂࣝࣈ⣔ࡢ㏦Ỉࣃ࢖ࣉࣛ࢖࡛ࣥ࠶ࡿ㸦ᅗ̺㸧ࠋ᪂₲┴బΏᕷ࡟❧ᆅࡋ㸪❹ᕤᚋ 6 ᖺࡀ⤒㐣ࡋࡓẚ㍑ⓗ᪂ࡋ࠸᪋タ࡛࠶ࡿࠋ඲㛗ࡣ⣙ 18 km㸪⟶ᚄȭ1,000㹼600mm ࡛࠶ࡿࠋ⟶✀ࡣ㗰⟶࠾ࡼࡧࢲࢡࢱ࢖ࣝ㗪㕲⟶࡛࠶ࡿࠋࢩࢫࢸ࣒ෆ㒊ࡢタィ᭱኱Ỉᅽࡣ 2.618 MPa㸦㟼Ỉᅽ=1.868 MPa㸪Ỉᧁᅽ=0.750 MPa㸧࡛࠶ࡿࠋ⾲ ࣃ࢖ࣉࣛ࢖ࣥ࡟Ⓨ⏕ࡍࡿἼື࣭᣺ືཎᅉ୙ලྜཎᅉྠᐃ᪉ἲᢏ⾡ㄢ㢟Ⓨ⏕Ⅼ࡜࿘㎶࡬ࡢᙳ㡪⠊ᅖ₃ࢀᮦᩱḞᦆ␗࡞ࡿ 2 Ⅼ࡛ྠᐃࡋࡓ₃ࢀ㉳※ࡢᙎᛶἼ᳨ฟ⢭ᗘ

Ⓨ⏕Ⅼࣂࣝࣈ➼ࡢᛴ⦰㒊࡟࠾࠸࡚ẼἻⓎ⏕ࢆక᧯స㏿ᗘⓎ⏕Ⅼ࠺࢟ࣕࣅࢸ࣮ࢩࣙࣥࡀⓎ⏕ࡍࡿࡓࡵ㸪Ἴ㓄⟶ᵓ㐀ࢆ┦஫┦㛵㛵ᩘ࡛ฎ⌮ࡋ㸪Ⓨ⏕఩⨨ࢆྠᐃ࢟ࣕࣅࢸ࣮ࣂࣝࣈ᧯సࢩࣙࣥື࡞࠸ࡋ᣺ື≉ᛶ࡜ࡋ࡚ྠᐃᅽຊἼࣂࣝࣈ᧯సỈᅽィࢆ⏝࠸ࡓィࡀ୍⯡ⓗ㸦Ỉᧁᅽ㸧᪋タ⪁ᮙ㓄⟶඲య໬㸦ᅽຊ⬦Ỉᅽィタື㸧⨨⟶య᣺ືࣂࣝࣈ᧯స⟶య᣺ືࡢཎᅉ࡜᣺ືࣞ࣋ࣝ࡜ࡢ┦㛵᣺ືཎᅉⓎ⏕Ⅼࡢྠᐃὶ㏿ኚື⟶㊰⥺ᙧ࡞࡝0.55Ỉᅽ䠄MPa)

0.50
0.45
0.40
0.35
0.30
0.25
0500

1000

1500

2000

᫬㛫䠄s䠅඲㛤㛢ሰ㛤ጞ㛢ሰ᏶஢ᅗ ᳨ฟࡋࡓᅽຊኚື≉ᛶ㸦ᆅⅬ $㸸ࣂࣝࣈ᧯సᆅⅬ㸧ࣃ࢖ࣉࣛ࢖ࣥ࡟Ⓨ⏕ࡍࡿỈ⌮⌧㇟㉳※ࡢ᣺ືࡸ఩㸪Wi-Fi ฼⏝࡟ࡼࡿࢹ࣮ࢱ㌿㏦ࢆᐇ⌧ࡋࡓࠋィἼືࡣ⾲̺ ࡟♧ࡍ 4 ✀ࡢ୺࡞⌧㇟ࡀ☜ㄆ࡛ࡁࡿࠋྍ⬟ࢳࣕࣥࢿࣝᩘࡣ 16 ࢳࣕࣥࢿ࡛ࣝ࠶ࡿࠋᴫせ㛤Ⓨ୰ࡢ↓⥺ AE ࢩࢫࢸ࣒ࡢ᪤Ꮡ᪋タ࡬ࡢ㐺⏝࡟ࢆᅗ̺ ࡟♧ࡍࠋ㛤Ⓨࢩࢫࢸ࣒ࡢ㐺⏝࡟ࡣ㸪ᐇ㦂㛤ࡘ࠸࡚ࡣ㸪᭱ࡶᙳ㡪ࡢ኱ࡁ࠸࡜⪃࠼ࡽࢀࡿᅽຊἼጞ๓࡟㟁Ἴࡢᣦྥᛶホ౯ࢆヨࡳ㸪ィࢹ࣮ࢱࡢఏࡢྠᐃࢆィ㏦⢭ᗘࡢ᳨ドࢆᐇ᪋ࡋࡓᚋ࡟㸪AE ィࢆヨࡳࡓࠋAE ィ᫬࡟Ⓨ⏕ࡍᑐ㇟࡟ᐇドⓗ᳨ウࢆヨࡳࡓ㸦ᅗ̺㸧ࠋ㸦㸧↓⥺ $( ࢩࢫࢸ࣒ࡢᵓ⠏࡜ᐇᵓ㐀≀࡛ࡢ᳨ドᵓ⠏ࡋࡓ↓⥺ AE ࢩࢫࢸ࣒ࡣ㸪ᙎᛶἼࡢࢧࣥࣉࣜ
ࣥࢢ࣮ࣞࢺࢆ 1 MHz ࡜ࡋ㸪GPS ࣔࢪ࣮ࣗࣝ࡟ࡼࡿ࡟ ICT ࢆᑟධࡍࡿࡇ࡜ࡣ㸪ィࡿ⭾኱࡞ᙎᛶἼ᝟ሗࡢ㎿㏿࡞ฎ⌮࣭ホ౯ࡀྍ⬟࡟
࡞ࡿ฼Ⅼࡀ࠶ࡿࠋᮏᐇ㦂ⓗ᳨ウ࡛ࡣ㸪ィࢆṆỈ≧ែ࠿ࡽ඲㛤ࢆ࡬࡚㸪ᮎ➃AE䜶䝛䝹䜼(V2䠅࠾࠸࡚㸪AE ィᑐ㇟࡛࠶ࡿ᪤Ꮡ᪋タ࡟ࣂࣝࣈࡢ⦆㛢ሰ࡟ࡼࡾᅽຊἼࢆⓎ⏕ࡉࡏ࡚ᐇ᪋ࡋࡓ 11)ࠋィᆅⅬࡣ㸪ᮎ➃ࣂࣝࣈ᧯సᆅⅬ㸦௨ୗ㸪ᆅⅬ A 㸪ᅗ̺㸧࡟ຍ࠼࡚㸪ᮎ➃࠿ࡽ⣙ 7.0 km㸦ᆅ

7060
50
4030
20100㡿ᇦ 05001000

Ⅼ B㸪᭱኱ỈᅽᆅⅬ㸧࠾ࡼࡧᮎ➃࠿ࡽ⣙ 14.1 km㸦ᆅ
Ⅼ C㸧ࡢ 2 ᆅⅬ࡛࠶ࡿ㸦ᅗ̺㸦D㸧㸧ࠋᅽຊἼࡢⓎ⏕

0.0025᪋タ࡟タ⨨ࡉࢀ࡚࠸ࡿࣈࣝ

ࢻࣥ⟶ࢆᑐ㇟࡟ 30 Hz ࡢ⏬ീྲྀᚓ࡛㸪⟶ෆࡢᅽຊኚືࢆྠᐃࡋࡓࠋAE ィ᮲௳ࡣ㸪㜈್ 42 dB㸪ቑAE䜶䝛䝹䜼䠄V2䠅

0.0030ィᅽຊἼࡢつᶍࡣ㸪ィ

2000

D ᆅⅬ $㸸ࣂࣝࣈ᧯సᆅⅬⅬࡣᆅⅬ A ࡛࠶ࡿࠋᆅⅬ B ࠾ࡼࡧᆅⅬ C ࡛ࡣ AEࡢࡳࢆᐇ᪋ࡋ㸪ࣂࣝࣈ᧯సࡣ⾜ࡗ࡚࠸࡞࠸ࠋ1500

᫬㛫 (s)

㡿ᇦ 

0.00200.00150.00100.00050.00000ᖜ 60 dB㸪౑⏝ࢭࣥࢧ 150 kHz ඹ᣺ᆺ㸪60 kHz ඹ᣺

500

1000

1500

2000

᫬㛫(䡏䠅ᆺ㸪30 kHz ඹ᣺ᆺ࡛࠶ࡿࠋE ᆅⅬ %㸸ࣂࣝࣈ᧯సᆅⅬࡼࡾ⣙ NP

ࣃ࢖ࣉࣛ࢖ࣥᅽຊἼⓎ⏕ᐇ㦂ᅗ ᳨ฟࡋࡓ $( ࡢ࢚ࢿࣝࢠ≉ᛶ㹼Ỉᅽኚື࡜ $( Ⓨ⏕ᣲືࡢ㛵ಀ㹼ࣂࣝࣈ᧯స࡟క࠸ィ㸦౑⏝ࢭࣥࢧ㸸N+] ඹ᣺ᆺ㸧ࣃ࢖ࣉࣛ࢖ࣥ࡟Ⓨ⏕ࡋࡓᅽຊኚືࢆᅗ̺ ࡟♧ࡍࠋィ᫬㛫ࡣ 2,340 ⛊㛫

0.040
0.030

㸦39 ศ㛫㸧࡛࠶ࡾ㸪඲㛢≧ែ࠿ࡽ㛤ᗘ 30 %ࡲ࡛㏻
᣺ᖜ್ (V)0.020Ỉ㸦᧯స㛤ጞ࠿ࡽ 840 ⛊㸧ࡋࡓᚋ࡟㛢ሰࢆ㛤ጞࡋ㸦᧯స㛤ጞ࠿ࡽ 960 ⛊㸧㸪඲㛢ࡋࡓ㸦᧯స㛤ጞ࠿ࡽ

0.010
0.000
-0.010-0.0201,616 ⛊㸧ࠋࣂࣝࣈ᧯సࢆᐇ᪋ࡋࡓᆅⅬ A ࡛ࡣ㸪Ỉᅽኚືࡀࣂࣝࣈ᧯స࡟౫Ꮡࡋ㸪ィ

-0.030-0.040㛤ጞ࠿ࡽ㛤ᗘ

020030 %ࡲ࡛ࡢỈᅽኚືࡀ 0.16 MPa ࡛࠶ࡿࡢ࡟ᑐࡋ࡚㸪㛢ሰ㛤ጞ࠿ࡽ඲㛢ࡲ࡛ࡀ 0.18 MPa㸪඲㛢ᚋࡢ

400600
᫬㛫 (μs)

800

1000



D ᳨ฟ $( Ἴᙧ3000.05࡛ࡣ㸪㛤ᨺ㐣⛬ࡀ 0.08 MPa㸪㛢ሰ㐣⛬ 0.18 MPa㸪

2500.04඲㛢ᚋ 0.19 MPa ࡛࠶ࡗࡓࠋᆅⅬ C ࡛ࡣ㸪㛤ᨺ㐣⛬
ࡀ 0.01 MPa㸪㛢ሰ㐣⛬ 0.03 MPa㸪඲㛢ᚋ 0.03 MPa࡛࠶ࡗࡓࠋᆅⅬ A ࡛ࡣ᫂☜࡟ࣂࣝࣈ᧯స࡟క࠺⟶య᣺ື㉳※ࡢᅽຊኚື㸦㛤ᨺ㐣⛬㸪㛢ሰ㐣⛬㸧࡜ᅽຊἼ㸦඲㛢ᚋ㸧࡜ࡢ┦㐪ࡀ᫂ࡽ࠿࡟࡞ࡗࡓࠋᆅⅬ B
࡜ᆅⅬ C ࡛ࡣ㸪ᆅⅬ A ࡜ẚ㍑ࡋ࡚㸪Ỉ⌮⌧㇟㉳※ࡢᅽຊኚືࡢᙳ㡪ࡀ⦰ᑠࡋࡓࠋ
ࡑࡇ࡛ᅗ̺ ࡟ࣂࣝࣈ᧯స᫬ࡢ AE ࢚ࢿࣝࢠ≉࿘Ἴᩘ(KHz)ᅽຊἼ㉳※ࡢ➨ 1 Ἴࡣ 0.24 MPa ࡛࠶ࡗࡓࠋᆅⅬ B

2000.03

1500.021000.01

500200600
400᫬㛫(μs)

800

1,0000E ࢙࣮࢘ࣈࣞࢵࢺゎᯒ⤖ᯝᅗ ᳨ฟἼ≉ᛶ㸦ᆅⅬ %㸸ࣂࣝࣈ㛢ሰᚋ㸧ᛶ 11)ࢆ♧ࡋ㸪AE ࣃ࣓࣮ࣛࢱゎᯒ 8)ࡢほⅬ࠿ࡽ⪃ᐹ࡛ࡣタィᇶ‽ 14)࡟ᇶ࡙ࡃᵓ㐀タィࡀ⾜ࢃࢀࡿࡀ㸪

ࡍࡿࠋᆅⅬ A ࡛ࡣ㸪ࣂࣝࣈ᧯స࡟క࠺⟶య᣺ື࡜᪋タࡢ㛗ᑑ࿨໬࡟క࠺ᦆയ⵳✚ࡸỈ⌮⌧㇟ࡢᙳ㡪⪃࠼ࡽࢀࡿ AE ࡀࣂࣝࣈ㛢ሰࡲ࡛㢖ฟࡋࡓ㸦ᅗ̺ࢆཷࡅࡿࠋࡑࡢ⤖ᯝ㸪㐠⏝ࢩࢫࢸ࣒࡛ࡣ≉᭷ࡢᵓ㐀㡿ᇦ 1㸧
ࠋᆅⅬ B ࡛ࡣ㸪ᆅⅬ A ࡜ࡣ␗࡞ࡾ㸪ࣂࣝࣈᙅ㒊ࡀⓎ㐩ࡍࡿࠋࡑࢀࡽࡣタィẁ㝵࡟࠾࠸࡚༑ศ

᧯స㛤ጞ࠿ࡽ 1,616 ⛊ᚋࡢ㛢ሰࡀ᏶஢ࡋࡓᚋ࡟ఏ࡟᫂ࡽ࠿࡟ࡍࡿࡇ࡜ࡀᅔ㞴࡛࠶ࡾ㸪㠀◚ቯ᳨ᰝ࡟᧛ࡋࡓᅽຊἼ࡜⪃࠼ࡽࢀࡿ AE ࡀ᳨ฟࡉࢀࡓ㸦ᅗ̺ࡼࡿྠᐃࡀ୙ྍḞ࡛࠶ࡿࠋᮏሗ࡛ᥦ᱌ࡋࡓ↓⥺ AE 㡿ᇦ 2㸧ࠋ㡿ᇦ 2 ࡟࠾ࡅࡿ AE ࡣ㛢ሰᚋ 57.1 ⛊࡛ࢩࢫࢸ࣒࡟ࡼࡿィ ࣭ホ౯ࡣ㸪ᗈ኱࡞⠊ᅖ࡟ࢩࢫࢸ

AE ࢚ࢿࣝࢠࡢࣆ࣮ࢡࡀほࡉࢀࡓࠋࡑࢀ௨ᚋ㸪ᖹ࣒ࢆᵓ⠏ࡋ࡚࠸ࡿ⥺ⓗ᪋タࡢ⪁ᮙ໬ᐇែࢆྠᐃࡍ

ᆒ 61.4 ⛊㸦57.1㹼65.9 ⛊㸧ẖ࡟ AE ࢚ࢿࣝࢠࣆ࣮ࢡࡿ᪉ἲㄽ࡜ࡋ࡚᭷⏝࡛࠶ࡿ࡜᥎ᐹࡉࢀࡿࠋAE ᢏ⾡ࡀほࡉࢀࡓࠋࣂࣝࣈ㛢ሰᚋ㸪ᅽຊィࡀ᳨▱ࡋࡓᅽࢆ⏝࠸ࡿࡇ࡜࡟ࡼࡾ㸪᳨ฟἼ≉ᛶ࠿ࡽỈ⌮⌧㇟࡜ຊἼࡢ➨ 1 Ἴࡣ 56.5 ⛊࡛฿㐩ࡋࡓࠋࡇࢀࡣ AE ࢚࡜ࡶ࡟㸪ᮦᩱᦆയࢆྵࡵࡓ㆟ㄽࡀྍ⬟࡜࡞ࡿࠋྠᵝࢿࣝࢠࣆ࣮ࢡ࡜࡯ࡰ୍⮴ࡋࡓࠋ᳨ฟࡋࡓ AE ࢆᅗ̺ࡢᣦ᦬ࡣ㸪᪤ ◊✲ 15)࡟࠾࠸࡚ࡶ☜ㄆ࡛ࡁࡿࠋ㏦

㸦ᆅⅬ B㸧࡟♧ࡍࠋᅗ̺ (a)ࡀ᳨ฟἼࡢ᫬้ṔἼ㓄Ỉࣃ࢖ࣉࣛ࢖ࣥ࡟࠾ࡅࡿ᝟ሗ㏻ಙᢏ⾡ࡢά⏝ࡣ㸪ᙧ࡛࠶ࡾ㸪ᅗ̺ (b)ࡀࡑࡢ࢙࣮࢘ࣈࣞࢵࢺゎᯒ⤖ᯝࣅࢵࢡࢹ࣮ࢱゎᯒ࡟ࡼࡿ᪤Ꮡ᪋タࡢ≉ᛶホ౯ࡀ୺࡛࠶ࡿࠋ࢙࣮࢘ࣈࣞࢵࢺゎᯒ࡜ࡣ᫬㛫㍈ୖ࡛ࡢྛ࡞ᑐ㇟࡜࡞ࡗ࡚࠸ࡿࡀ㸪ࡑࡢከࡃࡀ₃Ỉ஦ᨾࡸỈ࿘Ἴᩘᡂศࡢᙉᗘࢆどぬⓗ࡟ᅗ♧ࡋࡓࡶࡢ࡛࠶ࡿࠋ㟂せண࡞࡝㸪㝈ᐃࡉࢀࡓỈ⌮⌧㇟ࡢゎᯒⓗ᳨ウࡢ⤖ᯝ㸪ᆅⅬ A ࡟࠾ࡅࡿ㛤ᨺ㐣⛬ࡢ AE ࡣ㐃࡟⏝࠸ࡽࢀࡿࡇ࡜ࡀከ࠸㸦౛࠼ࡤᩥ⊩ 16)㸧ࠋࡼࡾ㛗⥆ᆺ AE ࡀ㢖ฟࡋࡓࡢ࡟ᑐࡋ࡚㸪ࣂࣝࣈ㛢ሰᚋ࡟᳨ᮇⓗ࡞᪋タಖ඲ࢆ⪃៖ࡋࡓሙྜ㸪Ỉ⌮⌧㇟࡜ᮦᩱฟࡉࢀࡓᆅⅬ B ࡛ࡢ AE ࡣᚤᙅ࡛ࡣ࠶ࡿࡀ✺Ⓨᆺᦆയࡢྠᐃࢆ AE ἲ࡟ࡼࡾヨࡳࡿࡇ࡜ࡣ᭷⏝ᛶࡢAE ࡟㏆࠸Ἴᙧᙧ≧࡛࠶ࡗࡓࠋᆅⅬ B ࡟࠾ࡅࡿ AE㧗࠸㠀◚ቯ᳨ᰝ࡛࠶ࡿ࡜⪃࠼ࡽࢀࡿࠋࡇࢀࡣ㸪ᮏᢏ※ࡣ㸪⟶య᣺ື࡟క࠺㐃⥆ᆺ AE ࡛ࡣ࡞ࡃ㸪ᆅⅬ A⾡ࡀᙎᛶἼࢆཷືⓗ࡟᳨ฟࡍࡿ≉ᚩ࠿ࡽ㸪㉳※ࡢ࡛Ⓨ⏕ࡋࡓᚋ࡟㓄⟶ෆࢆఏᦙࡋࡓᅽຊἼ࡟㉳ᅉࡍ␗࡞ࡿ AE ⌧㇟ࢆྠ᫬࠿ࡘ㧗⢭ᗘ᳨࡛ฟ࡛ࡁࡿࡇࡿ✺Ⓨᆺ AE ࡛࠶ࡿ࡜᥎ᐹࡉࢀࡿࠋᅽຊἼ㉳※ࡢ࡜࡟࠶ࡿࠋྠᵝࡢ᳨ウࡣ㸪࣏ࣥࣉタഛ࡞࡝࡟௦⾲ࡉAE ࡣ㸪㓄⟶ෆࢆᅽຊἼࡀఏᦙࡍࡿࡇ࡜࡟క࠸⟶ᮦࢀࡿືᶵᲔデ᩿ 17)࡟࠾࠸࡚ࡶヨࡳࡽࢀ࡚࠾ࡾ㸪AEࡀ⭾ᙇ཰⦰ࡍࡿ㝿ࡢኚᙧᣲື࡟㉳ᅉࡍࡿࡶࡢ࡜⪃ศ㔝࡟࠾ࡅࡿ◊✲஦౛ࡣከ࠸ࠋィ࠼ࡽࢀࡿࠋࡇࢀࡽࡢࡇ࡜࠿ࡽ㸪ࣃ࢖ࣉࣛ࢖ࣥࡢ≧ែホ౯࡟ࡇࢀࡽࡢࡇ࡜࠿ࡽ㸪ࣃ࢖ࣉࣛ࢖ࣥࢆఏ᧛ࡍࡿᅽࡣ㸪Ỉ⌮⌧㇟࡜ᮦᩱᦆയ࡟㉳ᅉࡍࡿ኱㔞ࡢἼື࣭᣺

ຊἼࡣ AE ࡜ࡋ᳨࡚ฟྍ⬟࡛࠶ࡿ࡜⪃࠼ࡽࢀࡿࠋ᳨ືࢹ࣮ࢱࡀ᭷⏝࡛࠶ࡿ࡜⪃࠼ࡽࢀࡿࠋࡑࡢ㝿㸪AEฟἼࡣ㸪ࣂࣝࣈ᧯సᆅⅬ࡜ࡣ␗࡞ࡾ㸪✺Ⓨᆺ AE ࡢἲࡣࡑࡢ≉ᚩ࠿ࡽ ICT ࢆ฼⏝ࡋࡓ኱つᶍࢹ࣮ࢱࡢᙧ≧ⓗ≉ᚩࢆ᭷ࡍࡿࡶࡢ࡜⪃࠼ࡽࢀࡿࠋຠ⋡ⓗ࠿ࡘࣜ࢔ࣝࢱ࢖࣒ィ࡟࠾࠸࡚᭷ᮃ࡞ᢏ⾡ศ㔝࡛࠶ࡿ࡜᥎ᐹࡉࢀࡿࠋࡑࡢ㝿㸪࣮ࣘࢨ࣮࣮࣋ࢫ㸬 ࣃ࢖ࣉࣛ࢖ࣥ≧ែホ౯࡬ࡢ $( ἲࡢ࡛ࡢࢹ࣮ࢱࢫࢺ࣮ࣞࢪࢆヲ⣽タᐃ㸦౛࠼ࡤ㸪ࢹ࣮ࢱ㐺⏝࡜᝟ሗ㏻ಙᢏ⾡㸦,&7㸧ࡢά⏝ฎ⌮᪉ἲࢆ㟂せ᫬ᮇ࡟༊ูࡋ࡚タᐃࡍࡿ࡞࡝㸧ࡍ

㏦㓄Ỉࣃ࢖ࣉࣛ࢖ࣥࡢᏳ඲ᛶࡣ㸪⟶ෆ࡛Ⓨ⏕ࡍࡿࡇ࡜࡟ࡼࡾ㸪㏦㓄Ỉࣃ࢖ࣉࣛ࢖ࣥ≉᭷ࡢỈ฼⏝ࡿỈ⌮⌧㇟࡜ࢩࢫࢸ࣒ࢆᵓᡂࡍࡿ⟶ᮦࡢ⪏ᅽᙉᗘᐇែࢆ㋃ࡲ࠼ࡓᶵ⬟デ᩿ࡀྍ⬟࡟࡞ࡿࡶࡢ࡜⪃࠼࡜ࡢ㛵ಀ࡛ᙳ㡪ࢆཷࡅࡿࠋ୍⯡ⓗ࡟㎰ᴗỈ฼᪋タࡽࢀࡿࠋ㸬࠾ࢃࡾ࡟8)

Suzuki, T., Ikeda, Y., Tomoda, Y. and Ohtsu, M.: Waterᮏㄽ࡛ࡣ㸪➹⪅ࡽࡀ㛤Ⓨࡋ࡚࠸ࡿ↓⥺ AE ࢩࢫࢸ- Leak Evaluation in Service Pipeline by Acoustic࣒ࢆ฼⏝ࡋࡓ㏦Ỉࣃ࢖ࣉࣛ࢖࡛ࣥࡢᅽຊἼⓎ⏕ᐇ

Emission, Journal of Acoustic Emission, 23, pp.

㦂ࢆ஦౛࡟㸪ࣃ࢖ࣉࣛ࢖ࣥ≧ែホ౯࡬ࡢ AE ἲࡢ㐺

272~276 (2005)⏝࡜ࡑࡢ᭷⏝ᛶ࡟ࡘ࠸࡚᝟ሗ㏻ಙᢏ⾡㸦ICT㸧ࡢほ9)㕥ᮌဴஓ㸪୰㐩㞝㸪ᶡᒇၨஅ㸪⏣୰Ⰻ࿴㸪㟷ᮌṇ

Ⅼ࠿ࡽ⪃ᐹࡋࡓࠋ᳨ウࡢ⤖ᯝ㸪AE ἲ࡜ ICT ࡟௦⾲㞝㸸AE ἲࢆ⏝࠸ࡓ࣮࢜ࣉࣥᆺࣃ࢖ࣉࣛ࢖ࣥ࡟Ⓨࡉࢀࡿ᝟ሗ㏻ಙᢏ⾡ࡢ⼥ྜ࡟ࡼࡾ㸪᪤Ꮡ᪋タࡢ≧⏕ࡍࡿẼᾮ஧┦ὶࡢ≉ᛶホ౯㸪ᵓ㐀ᕤᏛㄽᩥ㞟㸪ែホ౯⢭ᗘࡢྥୖࡣྍ⬟࡛࠶ࡿࡶࡢ࡜᥎ᐹࡉࢀࡿࠋ56A㸪pp. 665~670㸦2010㸧10) 㕥ᮌဴஓ㸪ஂಖᡂ㝯㸪㣤⏣ಇᙲ㸸ࣃ࢖ࣉࣛ࢖ࣥ࡟ཧ⪃ᩥ⊩1)2)Ⓨ⏕ࡋࡓᅽຊἼࡢ㠀◚ቯ᳨ฟ࡟㛵ࡍࡿ◊✲㸪㎰ᴗሷ㇂ᬛᇶ㸸㐨㊰࢖ࣥࣇࣛࡢ⥔ᣢ⟶⌮࡟㈨ࡍࡿඛ➃㎰ᮧᕤᏛ఍ㄽᩥ㞟㸪287㸪pp. 95~103㸦2013㸧ᢏ⾡◊✲㛤Ⓨ࡬ࡢྲྀࡾ⤌ࡳ㸦࢖ࣥࣇࣛඛ➃ᢏ⾡ඹ11) 㕥ᮌဴஓ㸪ᓥᮏ⏤㯞㸸AE ࣃ࣓࣮ࣛࢱゎᯒ࡟ᇶ࡙ྠ◊✲ㅮᗙ㸧㸪ி㒔኱Ꮫᢏ⾡ኈ఍఍ሗ㸪➨ 5 ྕ㸪ࡃ኱つᶍ㏦㓄Ỉࣃ࢖ࣉࣛ࢖ࣥࡢᅽຊἼఏᦙ≉ᛶ

pp. 1~4㸦2017㸧ホ౯㹼⥭ᛴ㐽᩿ᘚࡢᛶ⬟ホ౯ࢆ஦౛࡟㹼㸪ᖹᡂ 29᳃඘ᗈ㸪⸨ཎ㕲ᮁ㸪㰻⸨㇏㸪ቑᕝ᫴㸪Ώ჆ᩜ຾㸸ᖺᗘ JSNDI ➨ 2 ᅇ࢔ࢥ࣮ࢫࢸ࢕ࢵࢡ࣭࢚࣑ࢩࣙ㎰ᴗ⏝Ỉ㊰ኚ≧ㄪᰝࢩࢫࢸ࣒ࡢ㛤Ⓨ㸪㎰ᴗ㎰ᮧᕤࣥ㒊㛛ㅮ₇఍㸪pp. 13~20㸦2017㸧Ꮫ఍ㄽᩥ㞟㸪253㸪pp. 71~78㸦2016㸧3)

4)⸨ཎ㕲ᮁ㸪୰ᒣᐉὒ㸪᳃඘ᗈ㸪᳃୔ஂ㸪Ώ჆ᩜ຾㸪᳨ฟ࡟ࡼࡿ⿵ಟࣃ࢖ࣉࣛ࢖ࣥࡢỈᐦᛶ↷ᰝἲࡢ㰻⸨㇏㸪㧗ᒾᗤ༤㸸㎰ᴗ⏝Ỉ㊰ࢺࣥࢿ࣭ࣝࢧ࢖࣍

㛤Ⓨ㸪㎰ᴗ㎰ᮧᕤᏛ఍ㄅ㸪78㸦1㸧㸪pp. 3~6㸦2010㸧ࣥࡢ୙᩿Ỉㄪᰝ࣭デ᩿ᢏ⾡ࡢ㛤Ⓨ㸪ARIC ᝟ሗ㸪13) 㕥ᮌဴஓ㸪ஂಖᡂ㝯㸪㣤⏣ಇᙲ㸸ᙎᛶἼィ ࡟ࡼ104㸪pp. 42~48㸦2011㸧ࡿᦆയࣃ࢖ࣉࣛ࢖ࣥࡢỈᐦᛶホ౯࡟㛵ࡍࡿ◊✲㸪࿘⸨ᑗྖ㸪⥴᪉ⱥᙪ㸪ර㢌ṇᾈ㸪ᅵᒃ㈼ᙪ㸸ࢥࣥᅵᮌᏛ఍ㄽᩥ㞟 F6㸦Ᏻ඲ၥ㢟㸧㸪69㸦2㸧㸪pp. Ϩࢡ࣮ࣜࢺỈ฼ᵓ㐀≀ࢆᑐ㇟࡟ࡋࡓ⌧ᆅ㠀◚ቯヨ49~Ϩ54㸦2013㸧ᐃ᪉ἲ࡟㛵ࡍࡿ◊14) ㎰ᯘỈ⏘┬㎰ᮧ᣺⯆ᒁᩚഛ㒊タィㄢ┘ಟ㸪9. ⟶✲㸪㎰ᴗ㎰ᮧᕤᏛ఍ㄽᩥ㞟㸪295㸪pp. 69~75㸦2015㸧㊰ࡢᵓ㐀タィ㸪ᅵᆅᨵⰋ஦ᴗィ⏬タィᇶ‽ཬࡧ㐠࿘⸨ᑗྖ㸪⥴᪉ⱥᙪ㸪▼⚄ᬡ㑻㸪బ⸨ ᬛ㸸෾ᐖ⏝࣭ゎㄝ タィࠕࣃ࢖ࣉࣛ࢖ࣥࠖ㸪pp. 264~438㸦2009㸧㦂࡟ࡼࡿ୍ḟඹ㬆᣺ືᩘࡢ5)6)7)12) 㕥ᮌဴஓ㸪୰㐩㞝㸪ᶡᒇၨஅ㸪㟷ᮌṇ㞝㸸ᙎᛶἼຎ໬ࡢ⏕ࡌࡓࢥࣥࢡ࣮ࣜࢺࡢຊᏛ≉ᛶ࠾ࡼࡧ⌧15) Droubi, M. G., Reuben, R. L. and Steel, J. I.: Flowᆅ㠀◚ቯヨ㦂࡟ࡼࡿືᙎᛶಀᩘࡢホ౯ἲ࡟㛵ࡍnoise identification using acoustic emission (AE)ࡿ ◊ ✲ 㸪 ㎰ ᴗ ㎰ ᮧ ᕤ Ꮫ ఍ ㄽ ᩥ 㞟 㸪 303 㸪 pp.

energy decomposition for sand monitoring in flow

I_291~I_299㸦2016㸧pipeline, APPLIED ACOUSTICS, 131, pp. 5-15

Wright, S. J., Lewis, J. W. and Vasconcelos, J. G.:(2018)

Physical Process Resulting in Geysers in Rapidly16) Liu, X. F. and Nielsen, P. S.: A hybrid ICT-solution for

Filling Storm-Water Tunnels, Journal of Irrigation andsmart meter data analytics, ENERGY, 115, pp. 1710-

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Grosse, C. U. and Ohtsu, M. (Eds.): Acoustic Emission
Testing, Springer, (2008)17) ᪥ᮏ㠀◚ቯ᳨ᰝ༠఍㸸࢔ࢥ࣮ࢫࢸ࢕ࢵࢡ࣭࢚࣑ࢩࣙࣥ࡟ࡼࡿᶵᲔデ᩿㸪㸦2014㸧