{"id":2971,"date":"2025-10-04T14:07:29","date_gmt":"2025-10-04T14:07:29","guid":{"rendered":"https:\/\/productionscrews.com\/"},"modified":"2025-10-04T14:07:29","modified_gmt":"2025-10-04T14:07:29","slug":"advanced-track-inspection-how-modern-technology-keeps-railways-safe","status":"publish","type":"post","link":"https:\/\/productionscrews.com\/vi\/advanced-track-inspection-how-modern-technology-keeps-railways-safe\/","title":{"rendered":"Ki\u1ec3m tra \u0110\u01b0\u1eddng ray Ti\u00ean ti\u1ebfn: C\u00f4ng ngh\u1ec7 Hi\u1ec7n \u0111\u1ea1i Gi\u00fap \u0110\u01b0\u1eddng s\u1eaft An to\u00e0n"},"content":{"rendered":"

V\u01b0\u1ee3t ra kh\u1ecfi b\u1ec1 m\u1eb7t: Hi\u1ec3u c\u00e1ch ch\u00fang ta gi\u1eef an to\u00e0n cho \u0111\u01b0\u1eddng ray t\u00e0u h\u1ecfa<\/h2>\n

Khoa h\u1ecdc quan tr\u1ecdng \u0111\u1eb1ng sau an to\u00e0n<\/h2>\n

C\u00e1c \u0111o\u00e0n t\u00e0u hi\u1ec7n \u0111\u1ea1i d\u1ef1a tr\u00ean m\u1ed9t ch\u00e2n l\u00fd c\u01a1 b\u1ea3n: \u0111\u01b0\u1eddng ray ph\u1ea3i \u1edf tr\u1ea1ng th\u00e1i ho\u00e0n h\u1ea3o. Ki\u1ec3m tra \u0111\u01b0\u1eddng ray, do \u0111\u00f3, kh\u00f4ng ch\u1ec9 l\u00e0 m\u1ed9t c\u00f4ng vi\u1ec7c \u0111\u01a1n gi\u1ea3n m\u00e0 c\u00f2n l\u00e0 m\u1ed9t s\u1ef1 s\u1eed d\u1ee5ng th\u00f4ng minh c\u1ee7a k\u1ef9 thu\u1eadt v\u00e0 khoa h\u1ecdc. Ch\u00ednh khoa h\u1ecdc \u0111\u00f3 gi\u1eef cho h\u00e0ng tri\u1ec7u h\u00e0nh kh\u00e1ch v\u00e0 h\u00e0ng t\u1ea5n h\u00e0ng h\u00f3a di chuy\u1ec3n an to\u00e0n. S\u1ef1 chuy\u1ec3n \u0111\u1ed5i t\u1eeb ki\u1ec3m tra tr\u1ef1c quan \u0111\u01a1n gi\u1ea3n sang h\u1ec7 th\u1ed1ng t\u1ed1c \u0111\u1ed9 cao, \u0111\u01b0\u1ee3c \u0111i\u1ec1u khi\u1ec3n b\u1eb1ng m\u00e1y t\u00ednh cho th\u1ea5y c\u00f4ng ngh\u1ec7 \u0111\u00e3 ti\u1ebfn b\u1ed9 nh\u01b0 th\u1ebf n\u00e0o. S\u1ef1 ti\u1ebfn b\u1ed9 n\u00e0y x\u1ea3y ra v\u00ec ch\u00fang ta li\u00ean t\u1ee5c c\u1ea7n ph\u00e1t hi\u1ec7n c\u00e1c v\u1ea5n \u0111\u1ec1 nh\u1ecf h\u01a1n, ph\u00e1t hi\u1ec7n s\u1edbm h\u01a1n v\u00e0 ch\u1eafc ch\u1eafn h\u01a1n v\u1ec1 nh\u1eefng g\u00ec ch\u00fang ta t\u00ecm th\u1ea5y.<\/p>\n

Chuy\u1ec3n t\u1eeb \u201cC\u00e1i g\u00ec\u201d sang \u201cT\u1ea1i sao\u201d<\/h3>\n

Ph\u00e2n t\u00edch n\u00e0y v\u01b0\u1ee3t ra ngo\u00e0i m\u1ed9t c\u00e1i nh\u00ecn t\u1ed5ng quan \u0111\u01a1n gi\u1ea3n v\u1ec1 c\u00e1c ph\u01b0\u01a1ng ph\u00e1p ki\u1ec3m tra. M\u1ee5c ti\u00eau c\u1ee7a ch\u00fang t\u00f4i l\u00e0 ph\u00e2n t\u00edch c\u00e1c c\u00f4ng ngh\u1ec7 ch\u00ednh, tr\u1ea3 l\u1eddi kh\u00f4ng ch\u1ec9 \u201cc\u00e1i g\u00ec\u201d ch\u00fang l\u00e0m m\u00e0 c\u00f2n \u201cnh\u01b0 th\u1ebf n\u00e0o\u201d ch\u00fang ho\u1ea1t \u0111\u1ed9ng v\u00e0 \u201ct\u1ea1i sao\u201d ch\u00fang c\u1ea7n thi\u1ebft. Ch\u00fang t\u00f4i s\u1ebd kh\u00e1m ph\u00e1 khoa h\u1ecdc c\u01a1 b\u1ea3n v\u1ec1 c\u00e1ch c\u00e1c v\u1ebft n\u1ee9t tr\u00ean \u0111\u01b0\u1eddng ray b\u1ecb ph\u00e1 v\u1ee1, \u0111i\u1ec1u n\u00e0y gi\u00fap ch\u00fang ta x\u00e1c \u0111\u1ecbnh c\u00e1c v\u1ea5n \u0111\u1ec1 c\u1ea7n t\u00ecm. Sau \u0111\u00f3, ch\u00fang t\u00f4i s\u1ebd xem x\u00e9t c\u00e1c quy t\u1eafc c\u1ee7a ki\u1ec3m tra kh\u00f4ng ph\u00e1 h\u1ee7y (NDT), c\u00e1ch ch\u00fang ta \u0111o v\u1ecb tr\u00ed \u0111\u01b0\u1eddng ray r\u1ea5t ch\u00ednh x\u00e1c, c\u00e1c chi ti\u1ebft c\u1ee7a vi\u1ec7c thu th\u1eadp d\u1eef li\u1ec7u ti\u00ean ti\u1ebfn, v\u00e0 cu\u1ed1i c\u00f9ng, c\u00e1ch tr\u00ed tu\u1ec7 nh\u00e2n t\u1ea1o \u0111ang thay \u0111\u1ed5i ch\u00fang ta t\u1eeb vi\u1ec7c s\u1eeda ch\u1eefa c\u00e1c v\u1ea5n \u0111\u1ec1 sau khi ch\u00fang x\u1ea3y ra sang ph\u00f2ng ng\u1eeba ch\u00fang tr\u01b0\u1edbc khi x\u1ea3y ra. \u0110\u00e2y l\u00e0 m\u1ed9t c\u00e1i nh\u00ecn s\u00e2u v\u00e0o c\u00e1c quy t\u1eafc k\u1ef9 thu\u1eadt gi\u1eef cho \u0111\u01b0\u1eddng s\u1eaft c\u1ee7a ch\u00fang ta an to\u00e0n v\u00e0 \u0111\u00e1ng tin c\u1eady.<\/p>\n

\"H\u00ecnh <\/p>\n

Khoa h\u1ecdc v\u1ec1 c\u00e1ch c\u00e1c \u0111\u01b0\u1eddng ray b\u1ecb ph\u00e1 v\u1ee1<\/h2>\n

\u0110\u1ec3 hi\u1ec3u v\u1ec1 ki\u1ec3m tra \u0111\u01b0\u1eddng ray, tr\u01b0\u1edbc ti\u00ean ch\u00fang ta ph\u1ea3i hi\u1ec3u c\u00e1c l\u1ef1c c\u1ed1 g\u1eafng l\u00e0m h\u1ecfng \u0111\u01b0\u1eddng ray. M\u1ed7i chuy\u1ebfn t\u00e0u \u0111i qua \u0111\u1ec1u g\u00e2y ra \u00e1p l\u1ef1c v\u1eadt l\u00fd l\u1edbn l\u00ean ray th\u00e9p v\u00e0 c\u1ea5u tr\u00fac h\u1ed7 tr\u1ee3. Ph\u1ea7n n\u00e0y gi\u1ea3i th\u00edch l\u00fd do khoa h\u1ecdc t\u1ea1i sao vi\u1ec7c ki\u1ec3m tra \u0111\u01b0\u1eddng ray l\u00e0 ho\u00e0n to\u00e0n c\u1ea7n thi\u1ebft trong k\u1ef9 thu\u1eadt \u0111\u01b0\u1eddng s\u1eaft. Ch\u00fang ta t\u00ecm ki\u1ebfm c\u00e1c d\u1ea5u hi\u1ec7u c\u1ee7a c\u00e1c v\u1ea5n \u0111\u1ec1 v\u1eadt l\u00fd n\u00e0y tr\u01b0\u1edbc khi ch\u00fang tr\u1edf th\u00e0nh c\u00e1c s\u1ef1 c\u1ed1 l\u1edbn.<\/p>\n

\u00c1p l\u1ef1c, bi\u1ebfn d\u1ea1ng v\u00e0 m\u1ecfi kim lo\u1ea1i<\/h3>\n

M\u1ed9t ray l\u00e0 m\u1ed9t d\u1ea7m kim lo\u1ea1i ph\u1ee9c t\u1ea1p ch\u1ecbu nhi\u1ec1u l\u1ef1c kh\u00e1c nhau. Khi b\u00e1nh xe \u0111i qua, n\u00f3 t\u1ea1o ra nhi\u1ec1u lo\u1ea1i \u1ee9ng su\u1ea5t kh\u00e1c nhau. Tr\u1ecdng l\u01b0\u1ee3ng tr\u1ef1c ti\u1ebfp h\u01b0\u1edbng xu\u1ed1ng t\u1ea1o ra \u1ee9ng su\u1ea5t \u00e9p, trong khi ph\u00e2n t\u00e1n tr\u1ecdng l\u01b0\u1ee3ng n\u00e0y qua \u0111\u1ea7u ray, web v\u00e0 ch\u00e2n ray g\u00e2y ra u\u1ed1n, t\u1ea1o ra c\u1ea3 \u1ee9ng su\u1ea5t \u00e9p v\u00e0 k\u00e9o. \u1ee8ng su\u1ea5t c\u1eaft x\u1ea3y ra trong m\u1eb7t c\u1eaft ngang c\u1ee7a ray khi c\u00e1c l\u1edbp kh\u00e1c nhau ch\u1ed1ng l\u1ea1i s\u1ef1 tr\u01b0\u1ee3t qua nhau.<\/p>\n

Th\u00e9p, gi\u1ed1ng nh\u01b0 b\u1ea5t k\u1ef3 v\u1eadt li\u1ec7u n\u00e0o, c\u00f3 m\u1ed1i quan h\u1ec7 \u1ee9ng su\u1ea5t - bi\u1ebfn d\u1ea1ng ri\u00eang bi\u1ec7t. Trong gi\u1edbi h\u1ea1n co gi\u00e3n c\u1ee7a n\u00f3, n\u00f3 u\u1ed1n cong v\u00e0 tr\u1edf v\u1ec1 h\u00ecnh d\u1ea1ng ban \u0111\u1ea7u. V\u01b0\u1ee3t qu\u00e1 gi\u1edbi h\u1ea1n n\u00e0y, n\u00f3 thay \u0111\u1ed5i v\u0129nh vi\u1ec5n. Tuy nhi\u00ean, m\u1ed1i \u0111e d\u1ecda nguy hi\u1ec3m nh\u1ea5t l\u00e0 m\u1ecfi kim lo\u1ea1i. Ngay c\u1ea3 khi \u1ee9ng su\u1ea5t th\u1ea5p h\u01a1n nhi\u1ec1u so v\u1edbi s\u1ee9c ch\u1ecbu \u0111\u1ef1ng g\u00e3y c\u1ee7a th\u00e9p, c\u00e1c chu k\u1ef3 t\u1ea3i l\u1eb7p \u0111i l\u1eb7p l\u1ea1i\u2014h\u00e0ng t\u1ef7 l\u1ea7n trong su\u1ed1t tu\u1ed5i th\u1ecd c\u1ee7a tuy\u1ebfn \u0111\u01b0\u1eddng s\u1eaft\u2014c\u00f3 th\u1ec3 b\u1eaft \u0111\u1ea7u h\u00ecnh th\u00e0nh c\u00e1c v\u1ebft n\u1ee9t nh\u1ecf. Nh\u1eefng v\u1ebft n\u1ee9t n\u00e0y, th\u01b0\u1eddng b\u1eaft \u0111\u1ea7u t\u1eeb c\u00e1c l\u1ed7i nh\u1ecf tr\u00ean b\u1ec1 m\u1eb7t ho\u1eb7c d\u01b0\u1edbi l\u00f2ng \u0111\u1ea5t, ph\u00e1t tri\u1ec3n theo t\u1eebng chuy\u1ebfn t\u00e0u cho \u0111\u1ebfn khi \u0111\u1ea1t k\u00edch th\u01b0\u1edbc nguy hi\u1ec3m, d\u1eabn \u0111\u1ebfn g\u00e3y \u0111\u1ed9t ng\u1ed9t. C\u00e1c ho\u1ea1t \u0111\u1ed9ng v\u1eadn chuy\u1ec3n h\u00e0ng n\u1eb7ng hi\u1ec7n \u0111\u1ea1i, v\u1edbi t\u1ea3i tr\u1ecdng b\u00e1nh xe th\u01b0\u1eddng tr\u00ean 30 t\u1ea5n, t\u1ea1o ra \u1ee9ng su\u1ea5t ti\u1ebfp x\u00fac t\u1ea1i \u0111i\u1ec3m g\u1eb7p nhau gi\u1eefa b\u00e1nh xe v\u00e0 ray nh\u1ecf c\u00f3 th\u1ec3 v\u01b0\u1ee3t qu\u00e1 700 MPa, th\u00fac \u0111\u1ea9y qu\u00e1 tr\u00ecnh m\u1ecfi n\u00e0y nhanh h\u01a1n.<\/p>\n

Hi\u1ec7u \u1ee8ng Nhi\u1ec7t v\u00e0 \u00c1p L\u1ef1c<\/h3>\n

S\u1ef1 thay \u0111\u1ed5i nhi\u1ec7t \u0111\u1ed9 g\u00e2y ra m\u1ed9t ngu\u1ed3n c\u0103ng th\u1eb3ng l\u1edbn kh\u00e1c, \u0111\u1eb7c bi\u1ec7t trong h\u1ec7 th\u1ed1ng ray h\u00e0n li\u00ean t\u1ee5c (CWR). Khi th\u00e9p m\u1edf r\u1ed9ng trong nhi\u1ec7t \u0111\u1ed9 cao v\u00e0 co l\u1ea1i trong nhi\u1ec7t \u0111\u1ed9 th\u1ea5p, m\u1ed9t \u0111o\u1ea1n d\u00e0i c\u1ee7a CWR b\u1ecb gi\u1eef ch\u1eb7t s\u1ebd ph\u00e1t sinh c\u00e1c l\u1ef1c n\u1ed9i t\u1ea1i m\u1ea1nh theo chi\u1ec1u d\u00e0i. V\u00e0o ng\u00e0y n\u00f3ng, \u0111i\u1ec1u n\u00e0y th\u1ec3 hi\u1ec7n d\u01b0\u1edbi d\u1ea1ng \u00e1p l\u1ef1c \u00e9p l\u1edbn, t\u1ea1o ra nguy c\u01a1 cong v\u1eb9o \u0111\u01b0\u1eddng ray, n\u01a1i \u0111\u01b0\u1eddng ray \u0111\u1ed9t ng\u1ed9t v\u00e0 d\u1eef d\u1ed9i l\u1ec7ch kh\u1ecfi v\u1ecb tr\u00ed ban \u0111\u1ea7u. Ng\u01b0\u1ee3c l\u1ea1i, nhi\u1ec7t \u0111\u1ed9 c\u1ef1c th\u1ea5p t\u1ea1o ra l\u1ef1c k\u00e9o, c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn g\u00e3y \u0111o\u1ea1n, l\u00e0m \u0111\u1ee9t ho\u00e0n to\u00e0n ray. Qu\u1ea3n l\u00fd c\u0103ng th\u1eb3ng nhi\u1ec7t n\u00e0y l\u00e0 m\u1ed9t th\u00e1ch th\u1ee9c ch\u00ednh trong k\u1ef9 thu\u1eadt \u0111\u01b0\u1eddng ray.<\/p>\n

Chuy\u1ec3n \u0111\u1ed9ng c\u1ee7a m\u00e0i m\u00f2n v\u00e0 u\u1ed1n cong<\/h3>\n

Khu v\u1ef1c ti\u1ebfp x\u00fac tr\u1ef1c ti\u1ebfp gi\u1eefa b\u00e1nh xe v\u00e0 ray l\u00e0 n\u01a1i x\u1ea3y ra t\u01b0\u01a1ng t\u00e1c chuy\u1ec3n \u0111\u1ed9ng m\u00e3nh li\u1ec7t. \u0110i\u1ec1u n\u00e0y d\u1eabn \u0111\u1ebfn m\u1ed9t s\u1ed1 d\u1ea1ng h\u01b0 h\u1ecfng. M\u00e0i m\u00f2n tr\u1ea7y x\u01b0\u1edbc l\u00e0 s\u1ef1 m\u1ea5t m\u00e1t v\u1eadt li\u1ec7u d\u1ea7n d\u1ea7n t\u1eeb \u0111\u1ea7u ray do ma s\u00e1t g\u00e2y ra. M\u1ec7t m\u1ecfi ti\u1ebfp x\u00fac l\u0103n (RCF) l\u00e0 m\u1ed9t lo\u1ea1i v\u1ea5n \u0111\u1ec1 g\u00e2y n\u1ee9t b\u1ec1 m\u1eb7t, nh\u01b0 v\u1ebft n\u1ee9t \u0111\u1ea7u v\u00e0 s\u1ee9t m\u1ebb, do c\u00e1c \u1ee9ng su\u1ea5t ti\u1ebfp x\u00fac l\u1eb7p \u0111i l\u1eb7p l\u1ea1i cao g\u00e2y ra. D\u00f2ng ch\u1ea3y nh\u1ef1a l\u00e0 s\u1ef1 u\u1ed1n cong v\u0129nh vi\u1ec5n c\u1ee7a th\u00e9p \u0111\u1ea7u ray d\u01b0\u1edbi t\u1ea3i tr\u1ecdng n\u1eb7ng, c\u00f3 th\u1ec3 l\u00e0m thay \u0111\u1ed5i h\u00ecnh d\u1ea1ng c\u1ee7a ray v\u00e0 t\u1ea1o ra c\u00e1c t\u1eadp trung \u1ee9ng su\u1ea5t, \u0111\u00f3ng vai tr\u00f2 l\u00e0 \u0111i\u1ec3m kh\u1edfi \u0111\u1ea7u cho c\u00e1c lo\u1ea1i v\u1ea5n \u0111\u1ec1 kh\u00e1c.<\/p>\n

Quy t\u1eafc ki\u1ec3m tra kh\u00f4ng ph\u00e1 h\u1ee7y trong \u0111\u01b0\u1eddng s\u1eaft<\/h2>\n

Ki\u1ec3m tra kh\u00f4ng ph\u00e1 h\u1ee7y (NDT) l\u00e0 n\u1ec1n t\u1ea3ng c\u1ee7a vi\u1ec7c ki\u1ec3m tra \u0111\u01b0\u1eddng ray hi\u1ec7n \u0111\u1ea1i. C\u00e1c c\u00f4ng ngh\u1ec7 n\u00e0y cho ph\u00e9p ch\u00fang ta \"nh\u00ecn th\u1ea5y\" b\u00ean trong th\u00e9p v\u00e0 tr\u00ean b\u1ec1 m\u1eb7t c\u1ee7a n\u00f3 \u0111\u1ec3 ph\u00e1t hi\u1ec7n c\u00e1c v\u1ea5n \u0111\u1ec1 do c\u00e1c l\u1ef1c v\u1eadt l\u00fd \u0111\u00e3 m\u00f4 t\u1ea3 tr\u01b0\u1edbc \u0111\u00f3 g\u00e2y ra, t\u1ea5t c\u1ea3 m\u00e0 kh\u00f4ng l\u00e0m h\u1ecfng ch\u00ednh \u0111\u01b0\u1eddng ray. M\u1ed7i ph\u01b0\u01a1ng ph\u00e1p s\u1eed d\u1ee5ng m\u1ed9t quy t\u1eafc khoa h\u1ecdc kh\u00e1c nhau \u0111\u1ec3 ph\u00e1t hi\u1ec7n c\u00e1c lo\u1ea1i l\u1ed7i c\u1ee5 th\u1ec3. Hi\u1ec3u c\u00e1c quy t\u1eafc n\u00e0y l\u00e0 ch\u00eca kh\u00f3a \u0111\u1ec3 \u0111\u00e1nh gi\u00e1 \u0111\u00fang c\u00e1c \u0111i\u1ec3m m\u1ea1nh v\u00e0 \u0111i\u1ec3m y\u1ebfu c\u1ee7a ch\u00fang.<\/p>\n

Ki\u1ec3m tra s\u00f3ng \u00e2m (UT)<\/h3>\n

Ki\u1ec3m tra s\u00f3ng \u00e2m l\u00e0 ph\u01b0\u01a1ng ph\u00e1p ch\u00ednh \u0111\u1ec3 ph\u00e1t hi\u1ec7n c\u00e1c v\u1ea5n \u0111\u1ec1 b\u00ean trong \u0111\u1ea7u ray, web v\u00e0 ch\u00e2n \u0111\u1ebf.<\/p>\n

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  1. Qu\u00e1 tr\u00ecnh b\u1eaft \u0111\u1ea7u v\u1edbi m\u1ed9t thi\u1ebft b\u1ecb ch\u1ee9a m\u1ed9t tinh th\u1ec3 \u0111\u1eb7c bi\u1ec7t. Khi \u0111i\u1ec7n \u0111\u01b0\u1ee3c c\u1ea5p v\u00e0o, tinh th\u1ec3 dao \u0111\u1ed9ng \u1edf t\u1ea7n s\u1ed1 cao (th\u01b0\u1eddng t\u1eeb 2-5 MHz cho \u0111\u01b0\u1eddng ray), t\u1ea1o ra s\u00f3ng \u00e2m.<\/li>\n
  2. D\u1ea3i s\u00f3ng \u00e2m n\u00e0y \u0111\u01b0\u1ee3c g\u1eedi v\u00e0o \u0111\u01b0\u1eddng ray b\u1eb1ng m\u1ed9t m\u00f4i tr\u01b0\u1eddng, th\u01b0\u1eddng l\u00e0 n\u01b0\u1edbc ho\u1eb7c gel, v\u00ec kh\u00f4ng kh\u00ed l\u00e0 ch\u1ea5t d\u1eabn \u00e2m k\u00e9m.<\/li>\n
  3. D\u1ea3i s\u00f3ng di chuy\u1ec3n qua th\u00e9p. Quy t\u1eafc ch\u00ednh \u1edf \u0111\u00e2y l\u00e0 kh\u1ea3 n\u0103ng ch\u1ed1ng \u00e2m, t\u1ee9c l\u00e0 kh\u1ea3 n\u0103ng c\u1ee7a v\u1eadt li\u1ec7u ch\u1ed1ng l\u1ea1i s\u1ef1 truy\u1ec1n \u00e2m. Th\u00e9p c\u00f3 kh\u1ea3 n\u0103ng ch\u1ed1ng \u00e2m \u0111\u1eb7c tr\u01b0ng.<\/li>\n
  4. N\u1ebfu d\u1ea3i s\u00f3ng g\u1eb7p m\u1ed9t ranh gi\u1edbi c\u00f3 kh\u1ea3 n\u0103ng ch\u1ed1ng \u00e2m kh\u00e1c\u2014ch\u1eb3ng h\u1ea1n nh\u01b0 kh\u00f4ng kh\u00ed trong m\u1ed9t v\u1ebft n\u1ee9t ho\u1eb7c m\u1ed9t ph\u1ea7n t\u1eed l\u1ed3ng gh\u00e9p\u2014m\u1ed9t ph\u1ea7n n\u0103ng l\u01b0\u1ee3ng c\u1ee7a d\u1ea3i s\u00f3ng s\u1ebd b\u1eadt tr\u1edf l\u1ea1i v\u1ec1 ph\u00eda thi\u1ebft b\u1ecb.<\/li>\n
  5. Thi\u1ebft b\u1ecb c\u00f9ng l\u00fac \u0111\u00f3ng vai tr\u00f2 nh\u01b0 m\u1ed9t b\u1ed9 thu. D\u1ea3i s\u00f3ng \u00e2m tr\u1edf l\u1ea1i l\u00e0m cho tinh th\u1ec3 rung \u0111\u1ed9ng, t\u1ea1o ra \u0111i\u1ec7n. T\u00edn hi\u1ec7u \u0111i\u1ec7n n\u00e0y sau \u0111\u00f3 \u0111\u01b0\u1ee3c x\u1eed l\u00fd v\u00e0 hi\u1ec3n th\u1ecb.<\/li>\n<\/ol>\n

    K\u1ebft qu\u1ea3 th\u01b0\u1eddng \u0111\u01b0\u1ee3c hi\u1ec3n th\u1ecb d\u01b0\u1edbi d\u1ea1ng A-scan (\u0110\u1ed9 m\u1ea1nh so v\u1edbi Th\u1eddi gian), B-scan (h\u00ecnh c\u1eaft ngang), ho\u1eb7c C-scan (h\u00ecnh nh\u00ecn t\u1eeb tr\u00ean xu\u1ed1ng), m\u1ed7i lo\u1ea1i cung c\u1ea5p th\u00f4ng tin kh\u00e1c nhau v\u1ec1 k\u00edch th\u01b0\u1edbc, \u0111\u1ed9 s\u00e2u v\u00e0 h\u01b0\u1edbng c\u1ee7a v\u1ea5n \u0111\u1ec1.<\/p>\n

    Ki\u1ec3m tra D\u00f2ng \u0110i\u1ec7n (ECT)<\/h3>\n

    Ki\u1ec3m tra d\u00f2ng \u0111i\u1ec7n ho\u1ea1t \u0111\u1ed9ng t\u1ed1t trong vi\u1ec7c ph\u00e1t hi\u1ec7n c\u00e1c v\u1ebft n\u1ee9t tr\u00ean b\u1ec1 m\u1eb7t v\u00e0 g\u1ea7n b\u1ec1 m\u1eb7t, ph\u00f9 h\u1ee3p \u0111\u1ec3 ph\u00e1t hi\u1ec7n c\u00e1c v\u1ea5n \u0111\u1ec1 RCF.<\/p>\n

      \n
    1. M\u1ecf probe ECT ch\u1ee9a m\u1ed9t cu\u1ed9n d\u00e2y qua \u0111\u00f3 d\u00f2ng xoay chi\u1ec1u (AC) \u0111\u01b0\u1ee3c truy\u1ec1n qua.<\/li>\n
    2. Theo quy t\u1eafc c\u1ea3m \u1ee9ng \u0111i\u1ec7n t\u1eeb, d\u00f2ng AC n\u00e0y t\u1ea1o ra m\u1ed9t tr\u01b0\u1eddng t\u1eeb ch\u00ednh thay \u0111\u1ed5i xung quanh cu\u1ed9n d\u00e2y.<\/li>\n
    3. Khi m\u1ecf probe \u0111\u01b0\u1ee3c \u0111\u01b0a g\u1ea7n \u0111\u01b0\u1eddng ray (ch\u1ea5t d\u1eabn \u0111i\u1ec7n), tr\u01b0\u1eddng t\u1eeb ch\u00ednh t\u1ea1o ra c\u00e1c d\u00f2ng \u0111i\u1ec7n nh\u1ecf, h\u00ecnh tr\u00f2n trong b\u1ec1 m\u1eb7t \u0111\u01b0\u1eddng ray. \u0110\u00e2y g\u1ecdi l\u00e0 \u201cd\u00f2ng xo\u00e1y\u201d.<\/li>\n
    4. C\u00e1c d\u00f2ng xo\u00e1y n\u00e0y t\u1ea1o ra tr\u01b0\u1eddng t\u1eeb ph\u1ee5 c\u1ee7a ri\u00eang ch\u00fang, ch\u1ed1ng l\u1ea1i tr\u01b0\u1eddng ch\u00ednh.<\/li>\n
    5. N\u1ebfu b\u1ec1 m\u1eb7t \u0111\u01b0\u1eddng ray kh\u00f4ng c\u00f3 v\u1ea5n \u0111\u1ec1, c\u00e1c d\u00f2ng xo\u00e1y s\u1ebd ch\u1ea3y kh\u00f4ng b\u1ecb c\u1ea3n tr\u1edf theo m\u1ed9t m\u00f4 h\u00ecnh d\u1ef1 \u0111o\u00e1n \u0111\u01b0\u1ee3c. Tuy nhi\u00ean, m\u1ed9t v\u1ebft n\u1ee9t ho\u1eb7c v\u1ebft n\u1ee9t kh\u00e1c s\u1ebd l\u00e0m gi\u00e1n \u0111o\u1ea1n d\u00f2ng ch\u1ea3y n\u00e0y, bu\u1ed9c c\u00e1c d\u00f2ng xo\u00e1y ph\u1ea3i \u0111i v\u00f2ng quanh.<\/li>\n
    6. S\u1ef1 gi\u00e1n \u0111o\u1ea1n n\u00e0y thay \u0111\u1ed5i tr\u01b0\u1eddng t\u1eeb ph\u1ee5, t\u1eeb \u0111\u00f3 l\u00e0m thay \u0111\u1ed5i \u0111i\u1ec7n tr\u1edf c\u1ee7a cu\u1ed9n d\u00e2y trong m\u1ecf probe. S\u1ef1 thay \u0111\u1ed5i n\u00e0y \u0111\u01b0\u1ee3c \u0111o l\u01b0\u1eddng v\u00e0 \u0111\u00e1nh d\u1ea5u nh\u01b0 m\u1ed9t kh\u1ea3 n\u0103ng c\u00f3 v\u1ea5n \u0111\u1ec1.<\/li>\n<\/ol>\n

      \"M\u1ed9t <\/p>\n

      Ki\u1ec3m tra H\u1ea1t t\u1eeb (MPI)<\/h3>\n

      MPI l\u00e0 ph\u01b0\u01a1ng ph\u00e1p r\u1ea5t \u0111\u00e1ng tin c\u1eady, m\u1eb7c d\u00f9 th\u01b0\u1eddng ch\u1eadm h\u01a1n, \u0111\u1ec3 ph\u00e1t hi\u1ec7n c\u00e1c v\u1ebft n\u1ee9t tr\u00ean b\u1ec1 m\u1eb7t v\u00e0 g\u1ea7n b\u1ec1 m\u1eb7t trong c\u00e1c v\u1eadt li\u1ec7u t\u1eeb t\u00ednh nh\u01b0 th\u00e9p \u0111\u01b0\u1eddng ray.<\/p>\n

        \n
      1. M\u1ed9t tr\u01b0\u1eddng t\u1eeb m\u1ea1nh \u0111\u01b0\u1ee3c t\u1ea1o ra trong \u0111o\u1ea1n \u0111\u01b0\u1eddng ray c\u1ea7n ki\u1ec3m tra. Vi\u1ec7c n\u00e0y c\u00f3 th\u1ec3 th\u1ef1c hi\u1ec7n b\u1eb1ng nam ch\u00e2m v\u0129nh c\u1eedu, nam ch\u00e2m \u0111i\u1ec7n ho\u1eb7c b\u1eb1ng c\u00e1ch truy\u1ec1n d\u00f2ng \u0111i\u1ec7n l\u1edbn qua \u0111\u01b0\u1eddng ray.<\/li>\n
      2. Trong m\u1ed9t m\u1ea3nh th\u00e9p t\u1ed1t, c\u00e1c \u0111\u01b0\u1eddng l\u1ef1c t\u1eeb b\u1ecb gi\u1eef g\u1ea7n nh\u01b0 ho\u00e0n to\u00e0n trong ph\u1ea7n \u0111\u00f3.<\/li>\n
      3. N\u1ebfu c\u00f3 v\u1ebft n\u1ee9t tr\u00ean b\u1ec1 m\u1eb7t ho\u1eb7c g\u1ea7n b\u1ec1 m\u1eb7t, n\u00f3 t\u1ea1o ra m\u1ed9t v\u1ebft n\u1ee9t. V\u00ec kh\u00f4ng kh\u00ed kh\u00f4ng th\u1ec3 h\u1ed7 tr\u1ee3 l\u1ef1c t\u1eeb l\u1edbn nh\u01b0 th\u00e9p, tr\u01b0\u1eddng t\u1eeb b\u1ecb \u201cr\u00f2 r\u1ec9\u201d ra kh\u1ecfi ph\u1ea7n t\u1ea1i v\u1ecb tr\u00ed c\u1ee7a v\u1ebft n\u1ee9t. \u0110\u00e2y g\u1ecdi l\u00e0 tr\u01b0\u1eddng r\u00f2 r\u1ec9 t\u1eeb tr\u01b0\u1eddng.<\/li>\n
      4. C\u00e1c h\u1ea1t t\u1eeb nh\u1ecf (ho\u1eb7c d\u1ea1ng b\u1ed9t kh\u00f4 ho\u1eb7c ph\u00e2n t\u00e1n trong dung d\u1ecbch) sau \u0111\u00f3 \u0111\u01b0\u1ee3c ph\u1ee7 l\u00ean b\u1ec1 m\u1eb7t.<\/li>\n
      5. C\u00e1c h\u1ea1t n\u00e0y b\u1ecb h\u00fat v\u00e0o v\u00e0 t\u1eadp trung t\u1ea1i tr\u01b0\u1eddng r\u00f2 r\u1ec9 t\u1eeb, t\u1ea1o ra m\u1ed9t d\u1ea5u hi\u1ec7u r\u00f5 r\u00e0ng ngay tr\u00ean v\u1ebft n\u1ee9t, gi\u00fap x\u00e1c \u0111\u1ecbnh v\u1ecb tr\u00ed v\u00e0 k\u00edch th\u01b0\u1edbc c\u1ee7a n\u00f3 ngay l\u1eadp t\u1ee9c.<\/li>\n<\/ol>\n

        B\u1ea3ng 1: So s\u00e1nh c\u00e1c ph\u01b0\u01a1ng ph\u00e1p NDT<\/h3>\n\n\n\n\n\n\n
        C\u00f4ng ngh\u1ec7<\/td>\nQuy t\u1eafc c\u01a1 b\u1ea3n<\/td>\nS\u1eed d\u1ee5ng ch\u00ednh (C\u00e1c lo\u1ea1i v\u1ea5n \u0111\u1ec1)<\/td>\n\u01afu \u0111i\u1ec3m<\/td>\nH\u1ea1n ch\u1ebf<\/td>\n<\/tr>\n
        Ki\u1ec3m tra s\u00f3ng \u00e2m (UT)<\/td>\nS\u00f3ng \u00e2m t\u1ea7n cao di chuy\u1ec3n v\u00e0 ph\u1ea3n x\u1ea1<\/td>\nV\u1ea5n \u0111\u1ec1 b\u00ean trong (g\u00e3y ngang, n\u1ee9t l\u1ed7 bu l\u00f4ng), t\u00e1ch \u0111\u1ea7u\/khung<\/td>\n\u0110\u1ed9 xuy\u00ean s\u00e2u cao, nh\u1ea1y c\u1ea3m v\u1edbi c\u00e1c l\u1ed7i nh\u1ecf b\u00ean trong<\/td>\nY\u00eau c\u1ea7u m\u00f4i tr\u01b0\u1eddng ti\u1ebfp x\u00fac, k\u1ef9 n\u0103ng ng\u01b0\u1eddi v\u1eadn h\u00e0nh r\u1ea5t quan tr\u1ecdng, v\u00f9ng \u201cch\u1ebft\u201d g\u1ea7n b\u1ec1 m\u1eb7t<\/td>\n<\/tr>\n
        Ki\u1ec3m tra D\u00f2ng \u0110i\u1ec7n (ECT)<\/td>\nD\u1eabn t\u1eeb \u0111i\u1ec7n t\u1eeb v\u00e0 thay \u0111\u1ed5i \u0111i\u1ec7n tr\u1edf<\/td>\nC\u00e1c v\u1ebft n\u1ee9t g\u00e3y tr\u00ean b\u1ec1 m\u1eb7t v\u00e0 g\u1ea7n b\u1ec1 m\u1eb7t (v\u00ed d\u1ee5: RCF, ki\u1ec3m tra \u0111\u1ea7u)<\/td>\nT\u1ed1c \u0111\u1ed9 cao, kh\u00f4ng c\u1ea7n m\u00f4i tr\u01b0\u1eddng ti\u1ebfp x\u00fac, nh\u1ea1y c\u1ea3m v\u1edbi c\u00e1c l\u1ed7i nh\u1ecf tr\u00ean b\u1ec1 m\u1eb7t<\/td>\n\u0110\u1ed9 xuy\u00ean s\u00e2u h\u1ea1n ch\u1ebf, nh\u1ea1y c\u1ea3m v\u1edbi thay \u0111\u1ed5i t\u00ednh ch\u1ea5t v\u1eadt li\u1ec7u<\/td>\n<\/tr>\n
        Ki\u1ec3m tra H\u1ea1t t\u1eeb (MPI)<\/td>\nR\u00f2 r\u1ec9 t\u1eeb tr\u01b0\u1eddng t\u1ea1i c\u00e1c \u0111i\u1ec3m g\u00e3y<\/td>\nC\u00e1c v\u1ebft n\u1ee9t tr\u00ean b\u1ec1 m\u1eb7t v\u00e0 r\u1ea5t g\u1ea7n b\u1ec1 m\u1eb7t<\/td>\nR\u1ea5t \u0111\u00e1ng tin c\u1eady cho c\u00e1c v\u1ebft n\u1ee9t tr\u00ean b\u1ec1 m\u1eb7t, cung c\u1ea5p d\u1ea5u hi\u1ec7u tr\u1ef1c quan r\u00f5 r\u00e0ng<\/td>\nCh\u1ec9 d\u00e0nh cho v\u1eadt li\u1ec7u t\u1eeb, y\u00eau c\u1ea7u chu\u1ea9n b\u1ecb b\u1ec1 m\u1eb7t, g\u00e2y b\u1ea9n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

        C\u00e1ch ch\u00fang t\u00f4i \u0111o v\u1ecb tr\u00ed \u0111\u01b0\u1eddng ray<\/h2>\n

        Trong khi NDT t\u1eadp trung v\u00e0o \u0111\u1ed9 b\u1ec1n c\u1ee7a v\u1eadt li\u1ec7u c\u1ee7a ch\u00ednh \u0111\u01b0\u1eddng ray, vi\u1ec7c \u0111o h\u00ecnh d\u1ea1ng \u0111\u01b0\u1eddng ray ki\u1ec3m tra v\u1ecb tr\u00ed v\u00e0 h\u01b0\u1edbng t\u1ed5ng th\u1ec3 c\u1ee7a \u0111\u01b0\u1eddng ray trong kh\u00f4ng gian ba chi\u1ec1u. C\u00e1c h\u1ec7 th\u1ed1ng \u0111o h\u00ecnh d\u1ea1ng \u0111\u01b0\u1eddng ray hi\u1ec7n \u0111\u1ea1i (TGMS) l\u00e0 s\u1ef1 k\u1ebft h\u1ee3p tuy\u1ec7t v\u1eddi c\u1ee7a c\u00e1c c\u1ea3m bi\u1ebfn, c\u00f3 kh\u1ea3 n\u0103ng t\u1ea1o ra \u0111\u1ed9 ch\u00ednh x\u00e1c d\u01b0\u1edbi m\u1ed9t milimet khi di chuy\u1ec3n v\u1edbi t\u1ed1c \u0111\u1ed9 cao. Ph\u00e9p m\u00e0u kh\u00f4ng n\u1eb1m \u1edf m\u1ed9t c\u1ea3m bi\u1ebfn ho\u00e0n h\u1ea3o duy nh\u1ea5t, m\u00e0 \u1edf s\u1ef1 k\u1ebft h\u1ee3p th\u00f4ng minh c\u1ee7a nhi\u1ec1u c\u1ea3m bi\u1ebfn kh\u00f4ng ho\u00e0n h\u1ea3o.<\/p>\n

        \u0110\u1ecbnh ngh\u0129a c\u00e1c tham s\u1ed1 v\u1ecb tr\u00ed<\/h3>\n

        M\u1ed9t TGMS \u0111o l\u01b0\u1eddng nhi\u1ec1u th\u00f4ng s\u1ed1 quan tr\u1ecdng, m\u1ed7i th\u00f4ng s\u1ed1 \u0111\u1ec1u thi\u1ebft y\u1ebfu cho ho\u1ea1t \u0111\u1ed9ng t\u00e0u an to\u00e0n v\u00e0 tr\u00f4i ch\u1ea3y:<\/p>\n

          \n
        • Kho\u1ea3ng c\u00e1ch: Kho\u1ea3ng c\u00e1ch gi\u1eefa c\u00e1c m\u1eb7t trong c\u1ee7a hai ray. Kho\u1ea3ng c\u00e1ch kh\u00f4ng ch\u00ednh x\u00e1c c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn s\u1ef1 \u1ed5n \u0111\u1ecbnh c\u1ee7a ph\u01b0\u01a1ng ti\u1ec7n k\u00e9m ho\u1eb7c, trong nh\u1eefng tr\u01b0\u1eddng h\u1ee3p nghi\u00eam tr\u1ecdng, tr\u1eadt b\u00e1nh.<\/li>\n
        • C\u0103n ch\u1ec9nh: \u0110\u1ed9 th\u1eb3ng c\u1ee7a \u0111\u01b0\u1eddng ray tr\u00ean m\u1eb7t ph\u1eb3ng ngang. Th\u01b0\u1eddng \u0111\u01b0\u1ee3c \u0111o b\u1eb1ng \u0111\u1ed9 l\u1ec7ch so v\u1edbi m\u1ed9t \u0111\u01b0\u1eddng th\u1eb3ng qua m\u1ed9t \u0111o\u1ea1n cung x\u00e1c \u0111\u1ecbnh.<\/li>\n
        • H\u1ed3 s\u01a1\/ B\u1ec1 m\u1eb7t: \u0110\u1ed9 m\u01b0\u1ee3t c\u1ee7a \u0111\u01b0\u1eddng ray tr\u00ean m\u1eb7t ph\u1eb3ng \u0111\u1ee9ng cho m\u1ed7i ray. \u0110i\u1ec1u n\u00e0y t\u01b0\u01a1ng t\u1ef1 nh\u01b0 c\u0103n ch\u1ec9nh nh\u01b0ng trong chi\u1ec1u d\u1ecdc.<\/li>\n
        • Nghi\u00eang (Superelevation): S\u1ef1 ch\u00eanh l\u1ec7ch chi\u1ec1u cao gi\u1eefa ray cao v\u00e0 ray th\u1ea5p tr\u00ean m\u1ed9t \u0111o\u1ea1n cong, \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 ch\u1ed1ng l\u1ea1i l\u1ef1c ly t\u00e2m.<\/li>\n
        • Xo\u1eafn: T\u1ed1c \u0111\u1ed9 thay \u0111\u1ed5i c\u1ee7a nghi\u00eang theo m\u1ed9t kho\u1ea3ng c\u00e1ch x\u00e1c \u0111\u1ecbnh. Qu\u00e1 nhi\u1ec1u xo\u1eafn c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn gi\u1ea3m t\u1ea3i b\u00e1nh xe v\u00e0 t\u0103ng nguy c\u01a1 tr\u1eadt b\u00e1nh.<\/li>\n<\/ul>\n

          \"H\u00ecnh <\/p>\n

          Trung t\u00e2m K\u1ebft h\u1ee3p C\u1ea3m bi\u1ebfn: IMUs<\/h3>\n

          T\u1ea1i trung t\u00e2m c\u1ee7a h\u1ea7u h\u1ebft c\u00e1c h\u1ec7 th\u1ed1ng TGMS hi\u1ec7n \u0111\u1ea1i, t\u1ed1c \u0111\u1ed9 cao l\u00e0 m\u1ed9t \u0110\u01a1n v\u1ecb \u0110o l\u01b0\u1eddng Qu\u00e1n t\u00ednh (IMU). M\u1ed9t IMU ch\u1ee9a hai lo\u1ea1i c\u1ea3m bi\u1ebfn ch\u00ednh:<\/p>\n

            \n
          • C\u1ea3m bi\u1ebfn gia t\u1ed1c: Nh\u1eefng c\u1ea3m bi\u1ebfn n\u00e0y \u0111o gia t\u1ed1c tuy\u1ebfn t\u00ednh (t\u1ed1c \u0111\u1ed9 thay \u0111\u1ed5i c\u1ee7a t\u1ed1c \u0111\u1ed9) theo ba tr\u1ee5c vu\u00f4ng g\u00f3c (X, Y, Z).<\/li>\n
          • C\u1ea3m bi\u1ebfn gyroscope: Nh\u1eefng c\u1ea3m bi\u1ebfn n\u00e0y \u0111o t\u1ed1c \u0111\u1ed9 g\u00f3c (t\u1ed1c \u0111\u1ed9 quay) quanh c\u00f9ng ba tr\u1ee5c.<\/li>\n<\/ul>\n

            Trong l\u00fd thuy\u1ebft, b\u1eaft \u0111\u1ea7u t\u1eeb m\u1ed9t v\u1ecb tr\u00ed v\u00e0 h\u01b0\u1edbng \u0111\u00e3 bi\u1ebft v\u00e0 li\u00ean t\u1ee5c c\u1ed9ng d\u1ed3n c\u00e1c \u0111\u1ea7u ra t\u1eeb c\u1ea3m bi\u1ebfn gia t\u1ed1c v\u00e0 gyroscope theo th\u1eddi gian, ch\u00fang ta c\u00f3 th\u1ec3 t\u00ednh to\u00e1n t\u1ed1c \u0111\u1ed9, v\u1ecb tr\u00ed v\u00e0 h\u01b0\u1edbng c\u1ee7a ph\u01b0\u01a1ng ti\u1ec7n t\u1ea1i b\u1ea5t k\u1ef3 th\u1eddi \u0111i\u1ec3m n\u00e0o. Tuy nhi\u00ean, IMU g\u1eb7p ph\u1ea3i v\u1ea5n \u0111\u1ec1 t\u00edch h\u1ee3p s\u1eb5n: tr\u00f4i c\u1ea3m bi\u1ebfn. Nh\u1eefng l\u1ed7i nh\u1ecf kh\u00f4ng th\u1ec3 tr\u00e1nh kh\u1ecfi trong m\u1ed7i ph\u00e9p \u0111o t\u00edch t\u1ee5 theo th\u1eddi gian, khi\u1ebfn v\u1ecb tr\u00ed t\u00ednh to\u00e1n<\/p>\n

            \u0110\u1ea1t \u0111\u1ed9 ch\u00ednh x\u00e1c th\u00f4ng qua k\u1ebft h\u1ee3p<\/h3>\n

            M\u1ed9t IMU ri\u00eang l\u1ebb kh\u00f4ng \u0111\u1ee7 ch\u00ednh x\u00e1c cho h\u00ecnh h\u1ecdc \u0111\u01b0\u1eddng ray. Gi\u1ea3i ph\u00e1p l\u00e0 li\u00ean t\u1ee5c ch\u1ec9nh s\u1eeda d\u1eef li\u1ec7u tr\u00f4i c\u1ee7a n\u00f3 b\u1eb1ng c\u00e1c \u0111\u1ea7u v\u00e0o c\u1ea3m bi\u1ebfn \u0111\u1ed9c l\u1eadp kh\u00e1c. Th\u01b0\u1eddng \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n b\u1eb1ng m\u1ed9t thu\u1eadt to\u00e1n th\u1ed1ng k\u00ea ph\u1ee9c t\u1ea1p nh\u01b0 b\u1ed9 l\u1ecdc Kalman, gi\u00fap t\u1ed1i \u01b0u h\u00f3a vi\u1ec7c k\u1ebft h\u1ee3p d\u1eef li\u1ec7u t\u1eeb nhi\u1ec1u ngu\u1ed3n \u0111\u1ec3 t\u1ea1o ra \u01b0\u1edbc l\u01b0\u1ee3ng t\u1ed1i \u01b0u. Qu\u00e1 tr\u00ecnh k\u1ebft h\u1ee3p nh\u01b0 sau:<\/p>\n

              \n
            1. IMU cung c\u1ea5p \u01b0\u1edbc l\u01b0\u1ee3ng chuy\u1ec3n \u0111\u1ed9ng v\u00e0 h\u01b0\u1edbng c\u1ee7a ph\u01b0\u01a1ng ti\u1ec7n v\u1edbi t\u1ea7n s\u1ed1 cao (v\u00ed d\u1ee5, 1000 Hz). \u0110i\u1ec1u n\u00e0y n\u1eafm b\u1eaft c\u00e1c chi ti\u1ebft nh\u1ecf c\u1ee7a c\u00e1c ch\u1ed7 bump v\u00e0 \u0111\u01b0\u1eddng cong c\u1ee7a \u0111\u01b0\u1eddng ray nh\u01b0ng c\u00f3 xu h\u01b0\u1edbng tr\u00f4i.<\/li>\n
            2. H\u1ec7 th\u1ed1ng \u0110\u1ecbnh v\u1ecb To\u00e0n c\u1ea7u (GPS) cung c\u1ea5p v\u1ecb tr\u00ed to\u00e0n c\u1ea7u ch\u00ednh x\u00e1c th\u1ea5p h\u01a1n (v\u00ed d\u1ee5, 1-10 Hz) nh\u01b0ng tuy\u1ec7t \u0111\u1ed1i. Kh\u00f4ng b\u1ecb tr\u00f4i theo th\u1eddi gian d\u00e0i nh\u01b0ng kh\u00f4ng \u0111\u1ee7 ch\u00ednh x\u00e1c \u0111\u1ec3 \u0111o c\u00e1c v\u1ea5n \u0111\u1ec1 c\u1ee7a \u0111\u01b0\u1eddng ray m\u1ed9t c\u00e1ch \u0111\u1ed9c l\u1eadp. B\u1ed9 l\u1ecdc Kalman s\u1eed d\u1ee5ng d\u1eef li\u1ec7u GPS \u0111\u1ec3<\/li>\n
            3. Odometer (ho\u1eb7c c\u1ea3m bi\u1ebfn t\u1ed1c \u0111\u1ed9) k\u1ebft n\u1ed1i v\u1edbi b\u00e1nh xe cung c\u1ea5p ph\u00e9p \u0111o ch\u00ednh x\u00e1c r\u1ea5t cao v\u1ec1 qu\u00e3ng \u0111\u01b0\u1eddng \u0111\u00e3 \u0111i tr\u00ean \u0111\u01b0\u1eddng ray. \u0110i\u1ec1u n\u00e0y gi\u00fap s\u1eeda l\u1ed7i t\u00edch h\u1ee3p trong t\u00ednh to\u00e1n t\u1ed1c \u0111\u1ed9 theo chi\u1ec1u d\u00e0i c\u1ee7a IMU.<\/li>\n
            4. H\u1ec7 th\u1ed1ng laser v\u00e0 camera kh\u00f4ng ti\u1ebfp x\u00fac cung c\u1ea5p ph\u00e9p \u0111o tr\u1ef1c ti\u1ebfp, ch\u00ednh x\u00e1c cao v\u1ec1 h\u1ed3 s\u01a1 ray v\u00e0 v\u1ecb tr\u00ed c\u1ee7a ch\u00fang so v\u1edbi th\u00e2n xe ki\u1ec3m tra. Nh\u1eefng ph\u00e9p \u0111o n\u00e0y \u0111\u00f3ng vai tr\u00f2 l\u00e0m tham chi\u1ebfu ch\u00ednh \u0111\u1ec3 t\u00ednh to\u00e1n c\u00e1c gi\u00e1 tr\u1ecb cu\u1ed1i c\u00f9ng c\u1ee7a kho\u1ea3ng c\u00e1ch, c\u0103n ch\u1ec9nh v\u00e0 nghi\u00eang.<\/li>\n<\/ol>\n

              D\u1eef li\u1ec7u h\u00ecnh h\u1ecdc cu\u1ed1i c\u00f9ng, ch\u00ednh x\u00e1c cao, kh\u00f4ng ph\u1ea3i l\u00e0 k\u1ebft qu\u1ea3 c\u1ee7a b\u1ea5t k\u1ef3 c\u1ea3m bi\u1ebfn \u0111\u01a1n l\u1ebb n\u00e0o. N\u00f3 l\u00e0 k\u1ebft qu\u1ea3 t\u1ed1i \u01b0u h\u00f3a th\u1ed1ng k\u00ea c\u1ee7a vi\u1ec7c k\u1ebft h\u1ee3p \u0111\u1ed9 \u1ed5n \u0111\u1ecbnh ng\u1eafn h\u1ea1n c\u1ee7a IMU v\u1edbi \u0111\u1ed9 ch\u00ednh x\u00e1c d\u00e0i h\u1ea1n c\u1ee7a GPS v\u00e0 c\u00e1c ph\u00e9p \u0111o tr\u1ef1c ti\u1ebfp t\u1eeb odometers v\u00e0 h\u1ec7 th\u1ed1ng quang h\u1ecdc.<\/p>\n

              Thu th\u1eadp & X\u1eed l\u00fd D\u1eef li\u1ec7u N\u00e2ng cao<\/h2>\n

              Ngo\u00e0i c\u00e1c h\u1ec7 th\u1ed1ng ki\u1ec3m tra kh\u00f4ng ph\u00e1 h\u1ee7y (NDT) v\u00e0 h\u00ecnh h\u1ecdc c\u1ed1t l\u00f5i, m\u1ed9t b\u1ed9 c\u00f4ng ngh\u1ec7 m\u1edbi \u0111ang cung c\u1ea5p c\u00e1i nh\u00ecn to\u00e0n di\u1ec7n h\u01a1n v\u1ec1 t\u00ecnh tr\u1ea1ng \u0111\u01b0\u1eddng ray. C\u00e1c h\u1ec7 th\u1ed1ng n\u00e0y nh\u00ecn xa h\u01a1n ch\u00ednh \u0111\u01b0\u1eddng ray \u0111\u1ebfn c\u00e1c th\u00e0nh ph\u1ea7n xung quanh v\u00e0 c\u1ea5u tr\u00fac ph\u1ee5 tr\u1ee3. Song song v\u1edbi s\u1ef1 ti\u1ebfn b\u1ed9 c\u1ee7a ph\u1ea7n c\u1ee9ng l\u00e0 c\u00f4ng vi\u1ec7c quan tr\u1ecdng, th\u01b0\u1eddng kh\u00f4ng th\u1ea5y, c\u1ee7a x\u1eed l\u00fd t\u00edn hi\u1ec7u, bi\u1ebfn d\u1eef li\u1ec7u c\u1ea3m bi\u1ebfn nhi\u1ec5u th\u00e0nh th\u00f4ng tin h\u1eefu \u00edch.<\/p>\n

              Th\u1ecb gi\u00e1c, LiDAR v\u00e0 GPR<\/h3>\n
                \n
              • H\u1ec7 th\u1ed1ng Th\u1ecb gi\u00e1c T\u1ed1c \u0111\u1ed9 Cao: \u0110\u00e2y l\u00e0 nh\u1eefng h\u1ec7 th\u1ed1ng v\u01b0\u1ee3t xa camera \u0111\u01a1n gi\u1ea3n. \u0110\u01b0\u1ee3c trang b\u1ecb camera qu\u00e9t d\u00f2ng \u0111\u1ed9 ph\u00e2n gi\u1ea3i cao, h\u1ec7 th\u1ed1ng chi\u1ebfu s\u00e1ng m\u1ea1nh m\u1ebd v\u00e0 thu\u1eadt to\u00e1n th\u1ecb gi\u00e1c m\u00e1y t\u00ednh tinh vi, ch\u00fang ki\u1ec3m tra n\u1ec1n \u0111\u01b0\u1eddng \u0111\u1ec3 ph\u00e1t hi\u1ec7n c\u00e1c h\u1ecfng h\u00f3c th\u00e0nh ph\u1ea7n. C\u00e1c m\u00f4 h\u00ecnh \u0111\u01b0\u1ee3c h\u1ed7 tr\u1ee3 AI c\u00f3 th\u1ec3 t\u1ef1 \u0111\u1ed9ng x\u00e1c \u0111\u1ecbnh v\u00e0 \u0111\u1ecbnh v\u1ecb c\u00e1c v\u1ea5n \u0111\u1ec1 nh\u01b0 k\u1eb9p gi\u1eef b\u1ecb m\u1ea5t ho\u1eb7c h\u1ecfng, c\u00e1c m\u1ed1i n\u1ed1i b\u00ea t\u00f4ng ho\u1eb7c g\u1ed7 b\u1ecb n\u1ee9t, v\u00e0 c\u00e1c th\u00e0nh ph\u1ea7n chuy\u1ec3n m\u1ea1ch b\u1ecb h\u01b0 h\u1ecfng v\u1edbi t\u1ed1c \u0111\u1ed9 v\u01b0\u1ee3t qu\u00e1 100 d\u1eb7m\/gi\u1edd.<\/li>\n
              • LiDAR (Ph\u00e1t hi\u1ec7n v\u00e0 \u0110o kho\u1ea3ng c\u00e1ch b\u1eb1ng tia laser): H\u1ec7 th\u1ed1ng LiDAR g\u1eedi c\u00e1c xung laser v\u00e0 \u0111o th\u1eddi gian \u0111\u1ec3 ph\u1ea3n x\u1ea1 tr\u1edf l\u1ea1i, t\u1ea1o ra \u0111\u00e1m m\u00e2y \u0111i\u1ec3m 3D d\u00e0y \u0111\u1eb7c v\u00e0 ch\u00ednh x\u00e1c c\u1ee7a to\u00e0n b\u1ed9 h\u00e0nh lang \u0111\u01b0\u1eddng s\u1eaft. D\u1eef li\u1ec7u n\u00e0y v\u00f4 c\u00f9ng qu\u00fd gi\u00e1 \u0111\u1ec3 ki\u1ec3m tra kho\u1ea3ng c\u00e1ch c\u1ea5u tr\u00fac (h\u1ea7m, c\u1ea7u, n\u1ec1n ga), \u0111o h\u1ed3 s\u01a1 ballast \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o h\u1ed7 tr\u1ee3 \u0111\u00fang c\u00e1ch c\u1ee7a \u0111\u01b0\u1eddng ray, v\u00e0 x\u00e1c \u0111\u1ecbnh s\u1ef1 ph\u00e1t tri\u1ec3n c\u1ee7a th\u1ef1c v\u1eadt v\u00e0o ph\u1ea1m vi quy\u1ec1n \u0111i qua.<\/li>\n
              • GPR (Radar xuy\u00ean \u0111\u1ea5t): GPR cung c\u1ea5p c\u00e1i nh\u00ecn d\u01b0\u1edbi b\u1ec1 m\u1eb7t. M\u1ed9t anten g\u1eedi s\u00f3ng radio t\u1ea7n s\u1ed1 cao v\u00e0o \u0111\u1ea5t. C\u00e1c ph\u1ea3n x\u1ea1 c\u1ee7a c\u00e1c s\u00f3ng n\u00e0y, thay \u0111\u1ed5i d\u1ef1a tr\u00ean \u0111\u1eb7c t\u00ednh \u0111i\u1ec7n c\u1ee7a c\u00e1c v\u1eadt li\u1ec7u d\u01b0\u1edbi l\u00f2ng \u0111\u1ea5t, \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 \u0111\u00e1nh gi\u00e1 t\u00ecnh tr\u1ea1ng ballast v\u00e0 l\u1edbp n\u1ec1n d\u01b0\u1edbi. GPR c\u00f3 th\u1ec3 x\u00e1c \u0111\u1ecbnh c\u00e1c khu v\u1ef1c ballast b\u1ecb \u00f4 nhi\u1ec5m (n\u01a1i c\u00e1c h\u1ea1t m\u1ecbn \u0111\u00e3 l\u00e0m \u00f4 nhi\u1ec5m ballast th\u00f4, g\u00e2y t\u1eafc ngh\u1ebdn tho\u00e1t n\u01b0\u1edbc), ph\u00e1t hi\u1ec7n c\u00e1c t\u00fai n\u01b0\u1edbc b\u1ecb m\u1eafc k\u1eb9t (m\u1ed9t nguy\u00ean nh\u00e2n ch\u00ednh g\u00e2y m\u1ea5t \u1ed5n \u0111\u1ecbnh n\u1ec1n d\u01b0\u1edbi), v\u00e0 l\u1eadp b\u1ea3n \u0111\u1ed3 \u0111\u1ed9 d\u00e0y c\u1ee7a c\u00e1c l\u1edbp c\u1ea5u tr\u00fac d\u01b0\u1edbi kh\u00e1c nhau.<\/li>\n<\/ul>\n

                T\u1eeb D\u1eef li\u1ec7u Th\u00f4 \u0111\u1ebfn Ch\u1eef k\u00fd<\/h3>\n

                D\u1eef li\u1ec7u th\u00f4 t\u1eeb b\u1ea5t k\u1ef3 c\u1ea3m bi\u1ebfn n\u00e0o \u0111\u1ec1u c\u00f3 ti\u1ebfng \u1ed3n t\u1ef1 nhi\u00ean. Ngh\u1ec7 thu\u1eadt v\u00e0 khoa h\u1ecdc c\u1ee7a x\u1eed l\u00fd t\u00edn hi\u1ec7u l\u00e0 tr\u00edch xu\u1ea5t d\u1ea5u hi\u1ec7u y\u1ebfu \u1edbt c\u1ee7a m\u1ed9t v\u1ea5n \u0111\u1ec1 t\u1eeb ti\u1ebfng \u1ed3n n\u1ec1n n\u00e0y, m\u1ed9t kh\u00e1i ni\u1ec7m \u0111\u01b0\u1ee3c \u0111o b\u1eb1ng T\u1ef7 l\u1ec7 T\u00edn hi\u1ec7u tr\u00ean Nhi\u1ec5u (SNR).<\/p>\n

                C\u00e1c k\u1ef9 thu\u1eadt ch\u00ednh bao g\u1ed3m:<\/p>\n

                  \n
                • L\u1ecdc: B\u1ed9 l\u1ecdc k\u1ef9 thu\u1eadt s\u1ed1 l\u00e0 c\u1ea7n thi\u1ebft \u0111\u1ec3 l\u00e0m s\u1ea1ch t\u00edn hi\u1ec7u. V\u00ed d\u1ee5, m\u1ed9t b\u1ed9 l\u1ecdc th\u00f4ng d\u1ea3i \u00e1p d\u1ee5ng cho t\u00edn hi\u1ec7u \u00e2m thanh c\u00f3 th\u1ec3 lo\u1ea1i b\u1ecf ti\u1ebfng \u1ed3n t\u1ea7n s\u1ed1 th\u1ea5p t\u1eeb rung \u0111\u1ed9ng c\u1ee7a ph\u01b0\u01a1ng ti\u1ec7n v\u00e0 ti\u1ebfng \u1ed3n \u0111i\u1ec7n t\u1eed t\u1ea7n s\u1ed1 cao, c\u00f4 l\u1eadp ph\u1ea1m vi t\u1ea7n s\u1ed1 n\u01a1i c\u00e1c ph\u1ea3n x\u1ea1 v\u1ea5n \u0111\u1ec1 d\u1ef1 ki\u1ebfn xu\u1ea5t hi\u1ec7n.<\/li>\n
                • Ph\u00e2n t\u00edch Wavelet: K\u1ef9 thu\u1eadt ti\u00ean ti\u1ebfn n\u00e0y cho ph\u00e9p ph\u00e2n t\u00edch t\u00edn hi\u1ec7u trong c\u1ea3 hai mi\u1ec1n th\u1eddi gian v\u00e0 t\u1ea7n s\u1ed1 c\u00f9ng l\u00fac. \u0110\u1ed1i v\u1edbi c\u00e1c ph\u1ea3n x\u1ea1 \u00e2m thanh ph\u1ee9c t\u1ea1p, ph\u00e2n t\u00edch wavelet c\u00f3 th\u1ec3 gi\u00fap ph\u00e2n bi\u1ec7t gi\u1eefa ch\u1eef k\u00fd c\u1ee7a v\u1ebft n\u1ee9t v\u00e0 ph\u1ea3n x\u1ea1 h\u00ecnh h\u1ecdc (nh\u01b0 ph\u1ea3n x\u1ea1 t\u1eeb \u0111\u00e1y ray) b\u1eb1ng c\u00e1ch xem x\u00e9t th\u00e0nh ph\u1ea7n t\u1ea7n s\u1ed1 \u0111\u1ed9c \u0111\u00e1o c\u1ee7a n\u00f3 theo th\u1eddi gian.<\/li>\n<\/ul>\n

                  V\u00ed d\u1ee5 th\u1ef1c t\u1ebf t\u1eeb kinh nghi\u1ec7m c\u1ee7a ch\u00fang t\u00f4i: khi ph\u00e2n t\u00edch m\u1ed9t A-scan cho m\u1ed9t v\u1ea5n \u0111\u1ec1 ch\u00e9o c\u00f3 th\u1ec3 x\u1ea3y ra, t\u00edn hi\u1ec7u ban \u0111\u1ea7u th\u01b0\u1eddng b\u1ecb nhi\u1ec5u b\u1edfi ti\u1ebfng \u1ed3n t\u1eeb c\u1ea5u tr\u00fac h\u1ea1t c\u1ee7a ray. B\u01b0\u1edbc \u0111\u1ea7u ti\u00ean l\u00e0 \u00e1p d\u1ee5ng b\u1ed9 l\u1ecdc k\u1ef9 thu\u1eadt s\u1ed1 \u0111\u1ec3 lo\u1ea1i b\u1ecf ti\u1ebfng \u1ed3n t\u1ea7n s\u1ed1 cao. Sau \u0111\u00f3, ch\u00fang t\u00f4i t\u00ecm ki\u1ebfm m\u1ed9t ph\u1ea3n x\u1ea1 xu\u1ea5t hi\u1ec7n t\u1ea1i th\u1eddi gian bay c\u1ee5 th\u1ec3 t\u01b0\u01a1ng \u1ee9ng v\u1edbi trung t\u00e2m c\u1ee7a \u0111\u1ea7u ray, v\u1edbi c\u01b0\u1eddng \u0111\u1ed9 v\u01b0\u1ee3t qu\u00e1 ng\u01b0\u1ee1ng decibel \u0111\u00e3 \u0111\u1ecbnh. S\u1ef1 k\u1ebft h\u1ee3p gi\u1eefa v\u1ecb tr\u00ed, c\u01b0\u1eddng \u0111\u1ed9 v\u00e0 h\u00ecnh d\u1ea1ng n\u00e0y ph\u00e2n bi\u1ec7t ch\u1eef k\u00fd c\u1ee7a v\u1ea5n \u0111\u1ec1 th\u1ef1c s\u1ef1 v\u1edbi ph\u1ea3n x\u1ea1 h\u00ecnh h\u1ecdc v\u00f4 h\u1ea1i.<\/p>\n

                  B\u1ea3ng 2: C\u00f4ng ngh\u1ec7 Thu th\u1eadp D\u1eef li\u1ec7u N\u00e2ng cao<\/h3>\n\n\n\n\n\n\n
                  C\u00f4ng ngh\u1ec7<\/td>\nQuy t\u1eafc c\u01a1 b\u1ea3n<\/td>\n\u0110o l\u01b0\u1eddng Ch\u00ednh<\/td>\n\u1ee8ng d\u1ee5ng Ch\u00ednh trong Ki\u1ec3m tra \u0110\u01b0\u1eddng ray<\/td>\n<\/tr>\n
                  Th\u1ecb gi\u00e1c T\u1ed1c \u0111\u1ed9 Cao<\/td>\nH\u00ecnh \u1ea3nh \u0111\u1ed9 ph\u00e2n gi\u1ea3i cao & thu\u1eadt to\u00e1n th\u1ecb gi\u00e1c m\u00e1y t\u00ednh<\/td>\nV\u1ea5n \u0111\u1ec1 tr\u1ef1c quan tr\u00ean c\u00e1c th\u00e0nh ph\u1ea7n \u0111\u01b0\u1eddng ray<\/td>\nPh\u00e1t hi\u1ec7n k\u1eb9p gi\u1eef b\u1ecb h\u1ecfng\/m\u1ea5t, c\u00e1c m\u1ed1i n\u1ed1i b\u1ecb n\u1ee9t, v\u1ea5n \u0111\u1ec1 b\u1ec1 m\u1eb7t<\/td>\n<\/tr>\n
                  LiDAR<\/td>\n\u00c1nh s\u00e1ng laser xung v\u00e0 \u0111o th\u1eddi gian bay<\/td>\n\u0110\u00e1m m\u00e2y \u0111i\u1ec3m 3D c\u1ee7a \u0111\u01b0\u1eddng ray v\u00e0 m\u00f4i tr\u01b0\u1eddng xung quanh<\/td>\nKi\u1ec3m tra \u0111\u1ed9 r\u00f5 r\u00e0ng c\u1ee7a c\u1ea5u tr\u00fac, \u0111o h\u1ed3 s\u01a1 ballast, s\u1ef1 ph\u00e1t tri\u1ec3n c\u1ee7a th\u1ef1c v\u1eadt<\/td>\n<\/tr>\n
                  Radar xuy\u00ean \u0111\u1ea5t (GPR)<\/td>\nChuy\u1ec3n \u0111\u1ed9ng v\u00e0 ph\u1ea3n x\u1ea1 c\u1ee7a s\u00f3ng \u0111i\u1ec7n t\u1eeb<\/td>\nThu\u1ed9c t\u00ednh v\u1eadt li\u1ec7u d\u01b0\u1edbi l\u00f2ng \u0111\u1ea5t (h\u1eb1ng s\u1ed1 \u0111i\u1ec7n)<\/td>\n\u0110\u00e1nh gi\u00e1 \u00f4 nhi\u1ec5m ballast, ph\u00e1t hi\u1ec7n h\u00e0m l\u01b0\u1ee3ng n\u01b0\u1edbc, ph\u00e2n t\u00edch l\u1edbp n\u1ec1n d\u01b0\u1edbi<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

                  Chuy\u1ec3n \u0111\u1ed5i sang Tr\u00ed tu\u1ec7 nh\u00e2n t\u1ea1o d\u1ef1 \u0111o\u00e1n<\/h2>\n

                  Ranh gi\u1edbi cu\u1ed1i c\u00f9ng trong ki\u1ec3m tra \u0111\u01b0\u1eddng ray l\u00e0 s\u1ef1 chuy\u1ec3n \u0111\u1ed5i t\u1eeb m\u00f4 h\u00ecnh b\u1ea3o tr\u00ec ph\u1ea3n \u1ee9ng ho\u1eb7c ph\u00f2ng ng\u1eeba sang m\u00f4 h\u00ecnh d\u1ef1 \u0111o\u00e1n th\u1ef1c s\u1ef1. Tr\u00ed tu\u1ec7 nh\u00e2n t\u1ea1o v\u00e0 h\u1ecdc m\u00e1y l\u00e0 \u0111\u1ed9ng l\u1ef1c th\u00fac \u0111\u1ea9y s\u1ef1 chuy\u1ec3n \u0111\u1ed5i n\u00e0y. Thay v\u00ec ch\u1ec9 ph\u00e1t hi\u1ec7n c\u00e1c v\u1ea5n \u0111\u1ec1 \u0111\u00e3 t\u1ed3n t\u1ea1i, ch\u00fang ta hi\u1ec7n \u0111ang ph\u00e1t tri\u1ec3n kh\u1ea3 n\u0103ng d\u1ef1 b\u00e1o n\u01a1i v\u00e0 khi n\u00e0o ch\u00fang c\u00f3 kh\u1ea3 n\u0103ng h\u00ecnh th\u00e0nh, cho ph\u00e9p can thi\u1ec7p ch\u1ee7 \u0111\u1ed9ng.<\/p>\n

                  H\u1ecdc m\u00e1y \u0111\u1ec3 ph\u00e1t hi\u1ec7n<\/h3>\n

                  C\u00e1c m\u00f4 h\u00ecnh h\u1ecdc m\u00e1y \u0111ang \u0111\u01b0\u1ee3c hu\u1ea5n luy\u1ec7n \u0111\u1ec3 th\u1ef1c hi\u1ec7n v\u00e0 n\u00e2ng cao kh\u1ea3 n\u0103ng ph\u00e1t hi\u1ec7n v\u1ea5n \u0111\u1ec1 v\u1edbi t\u1ed1c \u0111\u1ed9 v\u00e0 \u0111\u1ed9 nh\u1ea5t qu\u00e1n v\u01b0\u1ee3t xa kh\u1ea3 n\u0103ng c\u1ee7a con ng\u01b0\u1eddi.<\/p>\n