{"id":4289,"date":"2025-08-22T08:59:11","date_gmt":"2025-08-22T08:59:11","guid":{"rendered":"https:\/\/commmesh.com\/?p=4289"},"modified":"2025-10-11T09:03:33","modified_gmt":"2025-10-11T09:03:33","slug":"distributed-acoustic-sensing-das","status":"publish","type":"post","link":"https:\/\/commmesh.com\/vi\/distributed-acoustic-sensing-das\/","title":{"rendered":"C\u1ea3m bi\u1ebfn \u00e2m thanh ph\u00e2n t\u00e1n (DAS) l\u00e0 g\u00ec?"},"content":{"rendered":"<p>C\u1ea3m bi\u1ebfn \u00c2m thanh Ph\u00e2n t\u00e1n (DAS) \u0111\u00e3 n\u1ed5i l\u00ean nh\u01b0 m\u1ed9t c\u00f4ng ngh\u1ec7 mang t\u00ednh c\u00e1ch m\u1ea1ng trong l\u0129nh v\u1ef1c c\u1ea3m bi\u1ebfn v\u00e0 gi\u00e1m s\u00e1t, t\u1eadn d\u1ee5ng s\u1ee9c m\u1ea1nh c\u1ee7a s\u1ee3i quang \u0111\u1ec3 ph\u00e1t hi\u1ec7n rung \u0111\u1ed9ng v\u00e0 t\u00edn hi\u1ec7u \u00e2m thanh t\u1eeb kho\u1ea3ng c\u00e1ch xa v\u1edbi \u0111\u1ed9 ch\u00ednh x\u00e1c ch\u01b0a t\u1eebng c\u00f3. Khi nhu c\u1ea7u v\u1ec1 c\u01a1 s\u1edf h\u1ea1 t\u1ea7ng ng\u00e0y c\u00e0ng t\u0103ng trong c\u00e1c l\u0129nh v\u1ef1c nh\u01b0 n\u0103ng l\u01b0\u1ee3ng, an ninh v\u00e0 gi\u00e1m s\u00e1t m\u00f4i tr\u01b0\u1eddng, DAS mang \u0111\u1ebfn m\u1ed9t gi\u1ea3i ph\u00e1p thay th\u1ebf hi\u1ec7u qu\u1ea3 v\u1ec1 chi ph\u00ed v\u00e0 \u0111\u1ed9 ph\u00e2n gi\u1ea3i cao cho c\u00e1c c\u1ea3m bi\u1ebfn truy\u1ec1n th\u1ed1ng. H\u01b0\u1edbng d\u1eabn n\u00e0y kh\u00e1m ph\u00e1 c\u00e1c nguy\u00ean t\u1eafc, \u1ee9ng d\u1ee5ng, th\u00e1ch th\u1ee9c v\u00e0 xu h\u01b0\u1edbng t\u01b0\u01a1ng lai c\u1ee7a DAS, d\u1ef1a tr\u00ean nh\u1eefng ti\u1ebfn b\u1ed9 g\u1ea7n \u0111\u00e2y v\u00e0 \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf ri\u00eang cho c\u00e1c chuy\u00ean gia trong l\u0129nh v\u1ef1c vi\u1ec5n th\u00f4ng, k\u1ef9 thu\u1eadt v\u00e0 c\u00e1c l\u0129nh v\u1ef1c li\u00ean quan \u0111ang t\u00ecm ki\u1ebfm gi\u1ea3i ph\u00e1p t\u1eeb CommMesh.<\/p>\n\n\n\n\n\n<h2 class=\"wp-block-heading\">Gi\u1edbi thi\u1ec7u v\u1ec1 c\u1ea3m bi\u1ebfn \u00e2m thanh ph\u00e2n t\u00e1n<\/h2>\n\n\n\n<p>C\u1ea3m bi\u1ebfn \u00c2m thanh Ph\u00e2n t\u00e1n (DAS) l\u00e0 m\u1ed9t c\u00f4ng ngh\u1ec7 d\u1ef1a tr\u00ean s\u1ee3i quang, bi\u1ebfn c\u00e1p quang th\u00f4ng th\u01b0\u1eddng th\u00e0nh c\u00e1c c\u1ea3m bi\u1ebfn ph\u00e2n t\u00e1n li\u00ean t\u1ee5c \u0111\u1ec3 ph\u00e1t hi\u1ec7n s\u00f3ng \u00e2m, rung \u0111\u1ed9ng v\u00e0 bi\u1ebfn d\u1ea1ng. Kh\u00f4ng gi\u1ed1ng nh\u01b0 c\u00e1c c\u1ea3m bi\u1ebfn \u0111i\u1ec3m th\u00f4ng th\u01b0\u1eddng, DAS s\u1eed d\u1ee5ng to\u00e0n b\u1ed9 chi\u1ec1u d\u00e0i c\u1ee7a s\u1ee3i quang - th\u01b0\u1eddng d\u00e0i h\u00e0ng kil\u00f4m\u00e9t - l\u00e0m th\u00e0nh ph\u1ea7n c\u1ea3m bi\u1ebfn, cung c\u1ea5p d\u1eef li\u1ec7u th\u1eddi gian th\u1ef1c v\u1edbi \u0111\u1ed9 ph\u00e2n gi\u1ea3i kh\u00f4ng gian l\u00ean \u0111\u1ebfn h\u00e0ng m\u00e9t. C\u00f4ng ngh\u1ec7 n\u00e0y d\u1ef1a tr\u00ean t\u00e1n x\u1ea1 ng\u01b0\u1ee3c Rayleigh, trong \u0111\u00f3 c\u00e1c xung \u00e1nh s\u00e1ng \u0111\u01b0\u1ee3c truy\u1ec1n qua s\u1ee3i quang t\u01b0\u01a1ng t\u00e1c v\u1edbi nhi\u1ec5u lo\u1ea1n \u00e2m thanh, l\u00e0m thay \u0111\u1ed5i t\u00edn hi\u1ec7u t\u00e1n x\u1ea1 ng\u01b0\u1ee3c \u0111\u01b0\u1ee3c ph\u00e2n t\u00edch \u0111\u1ec3 l\u1eadp b\u1ea3n \u0111\u1ed3 c\u00e1c s\u1ef1 ki\u1ec7n.<\/p>\n\n\n\n<p>\u0110\u01b0\u1ee3c ph\u00e1t tri\u1ec3n l\u1ea7n \u0111\u1ea7u ti\u00ean v\u00e0o nh\u1eefng n\u0103m 1980 cho ho\u1ea1t \u0111\u1ed9ng th\u0103m d\u00f2 d\u1ea7u kh\u00ed, DAS \u0111\u00e3 c\u00f3 nh\u1eefng b\u01b0\u1edbc ph\u00e1t tri\u1ec3n \u0111\u00e1ng k\u1ec3, v\u1edbi c\u00e1c h\u1ec7 th\u1ed1ng hi\u1ec7n c\u00f3 kh\u1ea3 n\u0103ng ph\u00e1t hi\u1ec7n t\u1ea7n s\u1ed1 t\u1eeb 0,001 Hz \u0111\u1ebfn v\u00e0i kHz tr\u00ean kho\u1ea3ng c\u00e1ch l\u00ean \u0111\u1ebfn 100 km. T\u00ednh \u0111\u1ebfn n\u0103m 2025, vi\u1ec7c tri\u1ec3n khai DAS \u0111\u00e3 m\u1edf r\u1ed9ng t\u1eeb gi\u00e1m s\u00e1t ng\u1ea7m sang c\u01a1 s\u1edf h\u1ea1 t\u1ea7ng \u0111\u00f4 th\u1ecb v\u00e0 c\u00e1c \u1ee9ng d\u1ee5ng h\u00e0ng h\u1ea3i, do nhu c\u1ea7u v\u1ec1 c\u00e1c gi\u1ea3i ph\u00e1p c\u1ea3m bi\u1ebfn kh\u00f4ng x\u00e2m l\u1ea5n, c\u00f3 kh\u1ea3 n\u0103ng m\u1edf r\u1ed9ng. Theo m\u1ed9t \u0111\u00e1nh gi\u00e1 n\u0103m 2024, DAS \u0111\u00e3 tr\u1edf th\u00e0nh m\u1ed9t c\u00f4ng c\u1ee5 quan tr\u1ecdng trong \u0111\u1ecba ch\u1ea5n h\u1ecdc v\u00e0 an ninh nh\u1edd kh\u1ea3 n\u0103ng cung c\u1ea5p c\u00e1c ph\u00e9p \u0111o li\u00ean t\u1ee5c, d\u00e0y \u0111\u1eb7c m\u00e0 kh\u00f4ng c\u1ea7n ph\u1ea7n c\u1ee9ng b\u1ed5 sung.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><a href=\"https:\/\/commmesh.com\/wp-content\/uploads\/2025\/08\/das.jpg\"><img fetchpriority=\"high\" decoding=\"async\" width=\"1000\" height=\"683\" src=\"https:\/\/commmesh.com\/wp-content\/uploads\/2025\/08\/das.jpg\" alt=\"das\" class=\"wp-image-4292\" srcset=\"https:\/\/commmesh.com\/wp-content\/uploads\/2025\/08\/das.jpg 1000w, https:\/\/commmesh.com\/wp-content\/uploads\/2025\/08\/das-300x205.jpg 300w, https:\/\/commmesh.com\/wp-content\/uploads\/2025\/08\/das-768x525.jpg 768w, https:\/\/commmesh.com\/wp-content\/uploads\/2025\/08\/das-18x12.jpg 18w, https:\/\/commmesh.com\/wp-content\/uploads\/2025\/08\/das-600x410.jpg 600w\" sizes=\"(max-width: 1000px) 100vw, 1000px\" \/><\/a><figcaption class=\"wp-element-caption\">das<\/figcaption><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">Nguy\u00ean l\u00fd c\u1ee7a c\u1ea3m bi\u1ebfn \u00e2m thanh ph\u00e2n t\u00e1n<\/h2>\n\n\n\n<p>The core principle of DAS involves interrogating an optical fiber with laser pulses and analyzing the backscattered light to detect acoustic perturbations. Here&#8217;s a breakdown of the key mechanisms:<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>Th\u1ea9m v\u1ea5n quang h\u1ecdc<\/strong>\n<ul class=\"wp-block-list\">\n<li>Ngu\u1ed3n laser \u0111\u1ed3ng b\u1ed9 ph\u00e1t ra c\u00e1c xung ng\u1eafn (th\u01b0\u1eddng k\u00e9o d\u00e0i 10\u2013100 ns) v\u00e0o s\u1ee3i quang \u1edf b\u01b0\u1edbc s\u00f3ng kho\u1ea3ng 1550 nm, v\u1edbi \u0111\u1ed9 suy gi\u1ea3m th\u1ea5p (kho\u1ea3ng 0,2 dB\/km). \u00c1nh s\u00e1ng truy\u1ec1n qua l\u00f5i, v\u00e0 m\u1ed9t ph\u1ea7n nh\u1ecf b\u1ecb t\u00e1n x\u1ea1 tr\u1edf l\u1ea1i do hi\u1ec7n t\u01b0\u1ee3ng t\u00e1n x\u1ea1 Rayleigh g\u00e2y ra b\u1edfi s\u1ef1 kh\u00f4ng \u0111\u1ed3ng nh\u1ea5t vi m\u00f4 trong s\u1ee3i quang.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>T\u00e1n x\u1ea1 ng\u01b0\u1ee3c Rayleigh<\/strong>\n<ul class=\"wp-block-list\">\n<li>S\u00f3ng \u00e2m ho\u1eb7c rung \u0111\u1ed9ng g\u00e2y ra bi\u1ebfn d\u1ea1ng c\u1ee5c b\u1ed9 trong s\u1ee3i quang, l\u00e0m d\u1ecbch chuy\u1ec3n pha ho\u1eb7c t\u1ea7n s\u1ed1 c\u1ee7a \u00e1nh s\u00e1ng t\u00e1n x\u1ea1 ng\u01b0\u1ee3c. S\u1ef1 d\u1ecbch chuy\u1ec3n n\u00e0y \u0111\u01b0\u1ee3c ph\u00e1t hi\u1ec7n b\u1eb1ng c\u00e1c k\u1ef9 thu\u1eadt giao thoa, ch\u1eb3ng h\u1ea1n nh\u01b0 ph\u00e9p \u0111o ph\u1ea3n x\u1ea1 mi\u1ec1n th\u1eddi gian quang h\u1ecdc nh\u1ea1y pha (\u03c6-OTDR).<\/li>\n\n\n\n<li>L\u01b0u \u00fd k\u1ef9 thu\u1eadt: \u0110\u1ed9 ph\u00e2n gi\u1ea3i kh\u00f4ng gian \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh b\u1edfi \u0111\u1ed9 r\u1ed9ng xung (v\u00ed d\u1ee5: 10 ns t\u01b0\u01a1ng \u1ee9ng v\u1edbi \u0111\u1ed9 ph\u00e2n gi\u1ea3i 1 m), trong khi ph\u1ea1m vi c\u1ea3m bi\u1ebfn b\u1ecb gi\u1edbi h\u1ea1n b\u1edfi suy hao s\u1ee3i quang, th\u01b0\u1eddng l\u00e0 50\u2013100 km n\u1ebfu kh\u00f4ng c\u00f3 b\u1ed9 l\u1eb7p.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>X\u1eed l\u00fd t\u00edn hi\u1ec7u<\/strong>\n<ul class=\"wp-block-list\">\n<li>T\u00edn hi\u1ec7u tr\u1ea3 v\u1ec1 \u0111\u01b0\u1ee3c gi\u1ea3i \u0111i\u1ec1u ch\u1ebf b\u1eb1ng ph\u01b0\u01a1ng ph\u00e1p ph\u00e1t hi\u1ec7n m\u1ea1ch l\u1ea1c ho\u1eb7c ph\u01b0\u01a1ng ph\u00e1p d\u1ef1a tr\u00ean c\u01b0\u1eddng \u0111\u1ed9 \u0111\u1ec3 tr\u00edch xu\u1ea5t th\u00f4ng tin \u00e2m thanh. C\u00e1c thu\u1eadt to\u00e1n ti\u00ean ti\u1ebfn, bao g\u1ed3m bi\u1ebfn \u0111\u1ed5i Fourier, chuy\u1ec3n \u0111\u1ed5i c\u00e1c thay \u0111\u1ed5i pha th\u00e0nh d\u1eef li\u1ec7u bi\u1ebfn d\u1ea1ng (c\u1ea5p nano) ho\u1eb7c d\u1eef li\u1ec7u rung \u0111\u1ed9ng.<\/li>\n\n\n\n<li>V\u00ed d\u1ee5, trong c\u00e1c \u1ee9ng d\u1ee5ng d\u01b0\u1edbi b\u1ec1 m\u1eb7t, DAS c\u00f3 th\u1ec3 \u0111o bi\u1ebfn d\u1ea1ng \u0111\u1ed9ng v\u1edbi \u0111\u1ed9 nh\u1ea1y xu\u1ed1ng t\u1edbi 10^{-9} bi\u1ebfn d\u1ea1ng\/\u221aHz, cho ph\u00e9p ph\u00e1t hi\u1ec7n c\u00e1c s\u1ef1 ki\u1ec7n \u0111\u1ecba ch\u1ea5n nh\u1ecf.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>C\u00e1c bi\u1ebfn th\u1ec3 h\u1ec7 th\u1ed1ng<\/strong>\n<ul class=\"wp-block-list\">\n<li><strong>Pha-DAS<\/strong>: \u0110\u1ed9 nh\u1ea1y cao \u0111\u1ed1i v\u1edbi c\u00e1c s\u1ef1 ki\u1ec7n t\u1ea7n s\u1ed1 th\u1ea5p (v\u00ed d\u1ee5: \u0111\u1ed9ng \u0111\u1ea5t).<\/li>\n\n\n\n<li><strong>C\u01b0\u1eddng \u0111\u1ed9-DAS<\/strong>: \u0110\u01a1n gi\u1ea3n h\u01a1n \u0111\u1ed1i v\u1edbi rung \u0111\u1ed9ng t\u1ea7n s\u1ed1 cao (v\u00ed d\u1ee5: gi\u00e1m s\u00e1t giao th\u00f4ng).<\/li>\n\n\n\n<li>L\u01b0u \u00fd k\u1ef9 thu\u1eadt: T\u00edch h\u1ee3p v\u1edbi c\u00e1c s\u1ee3i vi\u1ec5n th\u00f4ng hi\u1ec7n c\u00f3 cho ph\u00e9p c\u1ea3i t\u1ea1o, gi\u1ea3m chi ph\u00ed tri\u1ec3n khai 50% so v\u1edbi c\u1ea3m bi\u1ebfn chuy\u00ean d\u1ee5ng.<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n\n\n\n<h2 class=\"wp-block-heading\">\u1ee8ng d\u1ee5ng c\u1ee7a c\u1ea3m bi\u1ebfn \u00e2m thanh ph\u00e2n t\u00e1n<\/h2>\n\n\n\n<p>DAS&#8217;s ability to provide continuous, real-time monitoring has led to widespread adoption across industries:<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>Khai th\u00e1c d\u1ea7u kh\u00ed<\/strong>\n<ul class=\"wp-block-list\">\n<li>DAS \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 l\u1eadp h\u1ed3 s\u01a1 \u0111\u1ecba ch\u1ea5n th\u1eb3ng \u0111\u1ee9ng (VSP) v\u00e0 gi\u00e1m s\u00e1t gi\u1ebfng khoan, ph\u00e1t hi\u1ec7n d\u00f2ng ch\u1ea3y ch\u1ea5t l\u1ecfng v\u00e0 c\u00e1c v\u1ebft n\u1ee9t v\u1edbi \u0111\u1ed9 ph\u00e2n gi\u1ea3i 1 m tr\u00ean c\u00e1c gi\u1ebfng khoan d\u00e0i 10 km. N\u00f3 cho ph\u00e9p ch\u1ee5p \u1ea3nh \u0111\u1ecba ch\u1ea5n th\u1ee5 \u0111\u1ed9ng, c\u1ea3i thi\u1ec7n \u0111\u1eb7c t\u00ednh v\u1ec9a ch\u1ee9a b\u1eb1ng 20% so v\u1edbi c\u00e1c m\u00e1y \u0111o \u0111\u1ecba ch\u1ea5n truy\u1ec1n th\u1ed1ng.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>\u0110\u1ecba ch\u1ea5n h\u1ecdc v\u00e0 \u0110\u1ecba v\u1eadt l\u00fd<\/strong>\n<ul class=\"wp-block-list\">\n<li>\u0110\u01b0\u1ee3c tri\u1ec3n khai d\u1ecdc theo m\u1ea1ng l\u01b0\u1edbi c\u00e1p quang \u0111\u1ec3 t\u1ea1o ra c\u00e1c m\u1ea3ng \u0111\u1ecba ch\u1ea5n d\u00e0y \u0111\u1eb7c, DAS thu th\u1eadp c\u00e1c rung \u0111\u1ed9ng m\u1eb7t \u0111\u1ea5t v\u1edbi t\u1ea7n s\u1ed1 l\u00ean \u0111\u1ebfn 500 Hz, h\u1ed7 tr\u1ee3 c\u00e1c h\u1ec7 th\u1ed1ng c\u1ea3nh b\u00e1o s\u1edbm \u0111\u1ed9ng \u0111\u1ea5t. \u1ede khu v\u1ef1c \u0111\u00f4 th\u1ecb, n\u00f3 gi\u00e1m s\u00e1t c\u00e1c vi ch\u1ea5n \u0111\u1ec3 \u0111\u00e1nh gi\u00e1 t\u00ecnh tr\u1ea1ng k\u1ebft c\u1ea5u.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>Gi\u00e1m s\u00e1t c\u01a1 s\u1edf h\u1ea1 t\u1ea7ng<\/strong>\n<ul class=\"wp-block-list\">\n<li>\u0110\u1ed1i v\u1edbi \u0111\u01b0\u1eddng \u1ed1ng v\u00e0 \u0111\u01b0\u1eddng s\u1eaft, DAS ph\u00e1t hi\u1ec7n r\u00f2 r\u1ec9 ho\u1eb7c x\u00e2m nh\u1eadp v\u1edbi \u0111\u1ed9 nh\u1ea1y nano, bao ph\u1ee7 50 km ch\u1ec9 v\u1edbi m\u1ed9t b\u1ed9 d\u00f2 duy nh\u1ea5t. N\u00f3 x\u00e1c \u0111\u1ecbnh s\u1ef1 can thi\u1ec7p c\u1ee7a b\u00ean th\u1ee9 ba (v\u00ed d\u1ee5: \u0111\u00e0o b\u1edbi) theo th\u1eddi gian th\u1ef1c, gi\u1ea3m th\u1eddi gian ph\u1ea3n h\u1ed3i xu\u1ed1ng 30%.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>An ninh v\u00e0 B\u1ea3o v\u1ec7 Chu vi<\/strong>\n<ul class=\"wp-block-list\">\n<li>C\u00e1c s\u1ee3i quang \u0111\u01b0\u1ee3c ch\u00f4n d\u01b0\u1edbi \u0111\u1ea5t ho\u1ea1t \u0111\u1ed9ng nh\u01b0 h\u00e0ng r\u00e0o \u1ea3o, ph\u00e1t hi\u1ec7n ti\u1ebfng b\u01b0\u1edbc ch\u00e2n ho\u1eb7c ph\u01b0\u01a1ng ti\u1ec7n v\u1edbi \u0111\u1ed9 ch\u00ednh x\u00e1c 5m trong ph\u1ea1m vi 40 km. \u0110\u01b0\u1ee3c s\u1eed d\u1ee5ng trong an ninh bi\u00ean gi\u1edbi v\u00e0 c\u01a1 s\u1edf h\u1ea1 t\u1ea7ng quan tr\u1ecdng, DAS gi\u1ea3m thi\u1ec3u b\u00e1o \u0111\u1ed9ng gi\u1ea3 th\u00f4ng qua b\u1ed9 l\u1ecdc AI.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>\u1ee8ng d\u1ee5ng \u0111\u1ea1i d\u01b0\u01a1ng v\u00e0 h\u00e0ng h\u1ea3i<\/strong>\n<ul class=\"wp-block-list\">\n<li>C\u00e1p ng\u1ea7m cho ph\u00e9p c\u1ea3m bi\u1ebfn \u00e2m thanh d\u01b0\u1edbi n\u01b0\u1edbc \u0111\u1ec3 ph\u00e1t hi\u1ec7n s\u00f3ng th\u1ea7n v\u00e0 theo d\u00f5i \u0111\u1ed9ng v\u1eadt c\u00f3 v\u00fa bi\u1ec3n, v\u1edbi ph\u1ea1m vi l\u00ean t\u1edbi 100 km v\u00e0 \u0111\u00e1p \u1ee9ng t\u1ea7n s\u1ed1 t\u1edbi 1 kHz.<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n\n\n\n<p>Technical Note: DAS&#8217;s scalability allows integration with existing telecom infrastructure, turning 1000 km of fiber into a sensor array equivalent to 100,000 point sensors.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Th\u00e0nh ph\u1ea7n k\u1ef9 thu\u1eadt v\u00e0 thi\u1ebft k\u1ebf h\u1ec7 th\u1ed1ng<\/h2>\n\n\n\n<p>H\u1ec7 th\u1ed1ng DAS bao g\u1ed3m m\u1ed9t s\u1ed1 th\u00e0nh ph\u1ea7n ch\u00ednh:<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u0110\u01a1n v\u1ecb th\u1ea9m v\u1ea5n<\/strong>\n<ul class=\"wp-block-list\">\n<li>The &#8220;brain&#8221; of DAS, it generates laser pulses (1\u201310 kHz repetition rate) and analyzes backscattered light with photodetectors and DSP chips. Modern units achieve 1 m spatial resolution and 100 km range.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>C\u00e1p quang<\/strong>\n<ul class=\"wp-block-list\">\n<li>Ti\u00eau chu\u1ea9n <a href=\"https:\/\/commmesh.com\/vi\/single-mode-vs-multimode-fiber\/\" target=\"_blank\" rel=\"noreferrer noopener\">s\u1ee3i quang \u0111\u01a1n mode<\/a> (9\/125 \u03bcm) \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng, v\u1edbi \u0111\u1ed9 suy gi\u1ea3m th\u1ea5p (0,2 dB\/km) \u1edf 1550 nm. S\u1ee3i quang t\u0103ng c\u01b0\u1eddng v\u1edbi \u0111\u1ed9 t\u00e1n x\u1ea1 Rayleigh cao gi\u00fap c\u1ea3i thi\u1ec7n \u0111\u1ed9 nh\u1ea1y l\u00ean 10%.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>Ph\u1ea7n m\u1ec1m x\u1eed l\u00fd t\u00edn hi\u1ec7u<\/strong>\n<ul class=\"wp-block-list\">\n<li>Thu\u1eadt to\u00e1n AI x\u1eed l\u00fd d\u1eef li\u1ec7u \u0111\u1ec3 ph\u00e2n lo\u1ea1i s\u1ef1 ki\u1ec7n (v\u00ed d\u1ee5: xe c\u1ed9 so v\u1edbi \u0111\u1ed9ng v\u1eadt), v\u1edbi m\u00e1y h\u1ecdc gi\u00fap gi\u1ea3m s\u1ed1 l\u01b0\u1ee3ng k\u1ebft qu\u1ea3 d\u01b0\u01a1ng t\u00ednh gi\u1ea3 xu\u1ed1ng 25%.<\/li>\n\n\n\n<li>Ghi ch\u00fa k\u1ef9 thu\u1eadt: Bi\u1ebfn \u0111\u1ed5i Fourier nhanh (FFT) chuy\u1ec3n \u0111\u1ed5i t\u00edn hi\u1ec7u mi\u1ec1n th\u1eddi gian th\u00e0nh ph\u1ed5 t\u1ea7n s\u1ed1, x\u00e1c \u0111\u1ecbnh c\u00e1c rung \u0111\u1ed9ng t\u1eeb 0,001 Hz \u0111\u1ebfn kHz.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>T\u00edch h\u1ee3p v\u1edbi c\u00e1c c\u00f4ng ngh\u1ec7 kh\u00e1c<\/strong>\n<ul class=\"wp-block-list\">\n<li>H\u1ec7 th\u1ed1ng lai k\u1ebft h\u1ee3p DAS v\u1edbi c\u1ea3m bi\u1ebfn nhi\u1ec7t \u0111\u1ed9 ph\u00e2n t\u00e1n (DTS) \u0111\u1ec3 gi\u00e1m s\u00e1t \u0111a th\u00f4ng s\u1ed1, \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong \u0111\u01b0\u1eddng \u1ed1ng \u0111\u1ec3 ph\u00e1t hi\u1ec7n r\u00f2 r\u1ec9 v\u1edbi \u0111\u1ed9 ch\u00ednh x\u00e1c 0,1\u00b0C.<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n\n\n\n<h2 class=\"wp-block-heading\">Nh\u1eefng th\u00e1ch th\u1ee9c trong c\u1ea3m bi\u1ebfn \u00e2m thanh ph\u00e2n t\u00e1n<\/h2>\n\n\n\n<p>M\u1eb7c d\u00f9 c\u00f3 nhi\u1ec1u \u01b0u \u0111i\u1ec3m, DAS v\u1eabn ph\u1ea3i \u0111\u1ed1i m\u1eb7t v\u1edbi m\u1ed9t s\u1ed1 r\u00e0o c\u1ea3n:<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>C\u00e1c v\u1ea5n \u0111\u1ec1 v\u1ec1 ti\u1ebfng \u1ed3n v\u00e0 \u0111\u1ed9 nh\u1ea1y<\/strong>\n<ul class=\"wp-block-list\">\n<li>Ti\u1ebfng \u1ed3n xung quanh (v\u00ed d\u1ee5 nh\u01b0 gi\u00f3 ho\u1eb7c giao th\u00f4ng) c\u00f3 th\u1ec3 che khu\u1ea5t c\u00e1c t\u00edn hi\u1ec7u y\u1ebfu, l\u00e0m gi\u1ea3m SNR t\u1eeb 5\u201310 dB. Gi\u1ea3i ph\u00e1p: L\u1ecdc n\u00e2ng cao v\u00e0 ph\u00e1t hi\u1ec7n \u0111\u1ed3ng b\u1ed9 c\u1ea3i thi\u1ec7n \u0111\u1ed9 nh\u1ea1y l\u00ean \u0111\u1ebfn bi\u1ebfn d\u1ea1ng 10^{-9}\/\u221aHz.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>\u0110\u1ed9 ph\u00e2n gi\u1ea3i kh\u00f4ng gian v\u00e0 s\u1ef1 \u0111\u00e1nh \u0111\u1ed5i ph\u1ea1m vi<\/strong>\n<ul class=\"wp-block-list\">\n<li>\u0110\u1ed9 ph\u00e2n gi\u1ea3i cao h\u01a1n (1 m) gi\u1edbi h\u1ea1n ph\u1ea1m vi \u1edf m\u1ee9c 50 km do suy gi\u1ea3m t\u00edn hi\u1ec7u. Gi\u1ea3i ph\u00e1p: Khu\u1ebfch \u0111\u1ea1i Raman ph\u00e2n t\u00e1n m\u1edf r\u1ed9ng ph\u1ea1m vi l\u00ean \u0111\u1ebfn 100 km trong khi v\u1eabn duy tr\u00ec \u0111\u1ed9 ph\u00e2n gi\u1ea3i 5 m.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>Qu\u1ea3n l\u00fd d\u1eef li\u1ec7u<\/strong>\n<ul class=\"wp-block-list\">\n<li>DAS t\u1ea1o ra h\u00e0ng terabyte d\u1eef li\u1ec7u m\u1ed7i ng\u00e0y (v\u00ed d\u1ee5: 1 TB\/km\/ng\u00e0y \u1edf t\u1ea7n s\u1ed1 l\u1ea5y m\u1eabu 1 kHz), g\u00e2y qu\u00e1 t\u1ea3i l\u01b0u tr\u1eef. Gi\u1ea3i ph\u00e1p: Edge AI x\u1eed l\u00fd d\u1eef li\u1ec7u theo th\u1eddi gian th\u1ef1c, n\u00e9n b\u1eb1ng 80%.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>C\u00e0i \u0111\u1eb7t v\u00e0 kh\u1ea3 n\u0103ng t\u01b0\u01a1ng th\u00edch<\/strong>\n<ul class=\"wp-block-list\">\n<li>Vi\u1ec7c c\u1ea3i t\u1ea1o c\u00e1c s\u1ee3i quang hi\u1ec7n c\u00f3 c\u00f3 th\u1ec3 l\u00e0m gi\u1ea3m hi\u1ec7u su\u1ea5t vi\u1ec5n th\u00f4ng 0,1 dB. Gi\u1ea3i ph\u00e1p: S\u1eed d\u1ee5ng s\u1ee3i quang c\u1ea3m bi\u1ebfn chuy\u00ean d\u1ee5ng ho\u1eb7c c\u00e1p vi\u1ec5n th\u00f4ng-DAS lai gi\u00fap gi\u1ea3m thi\u1ec3u nhi\u1ec5u.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>C\u00e1c y\u1ebfu t\u1ed1 m\u00f4i tr\u01b0\u1eddng<\/strong>\n<ul class=\"wp-block-list\">\n<li>DAS d\u01b0\u1edbi n\u01b0\u1edbc b\u1ecb \u1ea3nh h\u01b0\u1edfng b\u1edfi nhi\u1ec5u \u0111\u1ea1i d\u01b0\u01a1ng (cao h\u01a1n t\u1edbi 10 dB), l\u00e0m gi\u1ea3m \u0111\u1ed9 ch\u00ednh x\u00e1c ph\u00e1t hi\u1ec7n. Gi\u1ea3i ph\u00e1p: C\u00e1c thu\u1eadt to\u00e1n ch\u1ecdn l\u1ecdc t\u1ea7n s\u1ed1 s\u1ebd c\u00f4 l\u1eadp t\u00edn hi\u1ec7u.<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n\n\n\n<p>L\u01b0u \u00fd k\u1ef9 thu\u1eadt: Th\u00e1ch th\u1ee9c c\u00e0ng l\u1edbn h\u01a1n trong c\u00e1c s\u1ee3i quang nhi\u1ec1u ng\u01b0\u1eddi d\u00f9ng, n\u01a1i l\u01b0u l\u01b0\u1ee3ng vi\u1ec5n th\u00f4ng g\u00e2y nhi\u1ec5u c\u00e1c xung c\u1ea3m bi\u1ebfn.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Xu h\u01b0\u1edbng t\u01b0\u01a1ng lai trong c\u1ea3m bi\u1ebfn \u00e2m thanh ph\u00e2n t\u00e1n<\/h2>\n\n\n\n<p>DAS \u0111\u00e3 s\u1eb5n s\u00e0ng cho nh\u1eefng b\u01b0\u1edbc ti\u1ebfn \u0111\u00e1ng k\u1ec3 v\u00e0o n\u0103m 2025:<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>T\u00edch h\u1ee3p AI v\u00e0 H\u1ecdc m\u00e1y<\/strong>\n<ul class=\"wp-block-list\">\n<li>AI enhances event classification, reducing false alarms by 30% and enabling predictive maintenance. Dekam-Fiber&#8217;s 2025 prototypes use ML for real-time strain mapping.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>Ph\u1ea1m vi v\u00e0 \u0111\u1ed9 ph\u00e2n gi\u1ea3i m\u1edf r\u1ed9ng<\/strong>\n<ul class=\"wp-block-list\">\n<li>Thi\u1ebft k\u1ebf s\u1ee3i quang m\u1edbi v\u1edbi kh\u1ea3 n\u0103ng t\u00e1n x\u1ea1 Rayleigh n\u00e2ng cao s\u1ebd m\u1edf r\u1ed9ng ph\u1ea1m vi l\u00ean 200 km v\u1edbi \u0111\u1ed9 ph\u00e2n gi\u1ea3i 0,5 m, s\u1eed d\u1ee5ng c\u00f4ng ngh\u1ec7 ph\u00e1t hi\u1ec7n t\u0103ng c\u01b0\u1eddng l\u01b0\u1ee3ng t\u1eed.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>C\u1ea3m bi\u1ebfn \u0111a ph\u01b0\u01a1ng th\u1ee9c<\/strong>\n<ul class=\"wp-block-list\">\n<li>H\u1ec7 th\u1ed1ng DAS-DTS-DBR lai s\u1ebd theo d\u00f5i \u00e2m thanh, nhi\u1ec7t \u0111\u1ed9 v\u00e0 bi\u1ebfn d\u1ea1ng \u0111\u1ed3ng th\u1eddi, v\u1edbi \u0111\u1ed9 nh\u1ea1y bi\u1ebfn d\u1ea1ng 0,1\u00b0C\/10^{-9} \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o t\u00ecnh tr\u1ea1ng c\u01a1 s\u1edf h\u1ea1 t\u1ea7ng to\u00e0n di\u1ec7n.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>DAS t\u0103ng c\u01b0\u1eddng l\u01b0\u1ee3ng t\u1eed<\/strong>\n<ul class=\"wp-block-list\">\n<li>C\u1ea3m bi\u1ebfn l\u01b0\u1ee3ng t\u1eed s\u1ebd t\u0103ng \u0111\u1ed9 nh\u1ea1y l\u00ean 10^{-10} bi\u1ebfn d\u1ea1ng\/\u221aHz, l\u00fd t\u01b0\u1edfng cho c\u00e1c \u1ee9ng d\u1ee5ng \u0111\u1ecba v\u1eadt l\u00fd, v\u1edbi c\u00e1c th\u1eed nghi\u1ec7m cho th\u1ea5y kh\u1ea3 n\u0103ng ph\u00e1t hi\u1ec7n \u0111\u01b0\u1ee3c c\u1ea3i thi\u1ec7n c\u1ee7a 20%.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>T\u00ednh b\u1ec1n v\u1eefng v\u00e0 gi\u1ea3m chi ph\u00ed<\/strong>\n<ul class=\"wp-block-list\">\n<li>C\u00e1c b\u1ed9 d\u00f2 th\u00e2n thi\u1ec7n v\u1edbi m\u00f4i tr\u01b0\u1eddng (gi\u1ea3m 20% \u0111i\u1ec7n n\u0103ng) v\u00e0 s\u1ee3i t\u00e1i ch\u1ebf s\u1ebd gi\u00fap gi\u1ea3m chi ph\u00ed 15%, ph\u00f9 h\u1ee3p v\u1edbi c\u00e1c s\u00e1ng ki\u1ebfn xanh.<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n\n\n\n<p>L\u01b0u \u00fd k\u1ef9 thu\u1eadt: T\u00edch h\u1ee3p 6G s\u1ebd s\u1eed d\u1ee5ng DAS \u0111\u1ec3 b\u1ea3o m\u1eadt m\u1ea1ng, ph\u00e1t hi\u1ec7n h\u00e0nh vi gi\u1ea3 m\u1ea1o v\u1edbi \u0111\u1ed9 ch\u00ednh x\u00e1c nano.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">C\u00e1c nghi\u00ean c\u1ee9u \u0111i\u1ec3n h\u00ecnh v\u1ec1 c\u1ea3m bi\u1ebfn \u00e2m thanh ph\u00e2n t\u00e1n<\/h2>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>Gi\u00e1m s\u00e1t \u0111\u01b0\u1eddng \u1ed1ng d\u1eabn d\u1ea7u \u1edf Hoa K\u1ef3<\/strong>\n<ul class=\"wp-block-list\">\n<li>M\u1ed9t c\u00f4ng ty n\u0103ng l\u01b0\u1ee3ng l\u1edbn \u0111\u00e3 tri\u1ec3n khai DAS tr\u00ean 50 km \u0111\u01b0\u1eddng \u1ed1ng, ph\u00e1t hi\u1ec7n r\u00f2 r\u1ec9 v\u1edbi \u0111\u1ed9 ch\u00ednh x\u00e1c 5 m v\u00e0 \u0111\u1ed9 nh\u1ea1y bi\u1ebfn d\u1ea1ng 10^{-8}.<\/li>\n\n\n\n<li>K\u1ebft qu\u1ea3: Gi\u1ea3m 25% s\u1ed1 v\u1ee5 tr\u00e0n d\u1ea7u, ti\u1ebft ki\u1ec7m h\u00e0ng tri\u1ec7u \u0111\u00f4 la chi ph\u00ed d\u1ecdn d\u1eb9p.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>M\u1ea1ng l\u01b0\u1edbi \u0111\u1ecba ch\u1ea5n \u1edf Nh\u1eadt B\u1ea3n<\/strong>\n<ul class=\"wp-block-list\">\n<li>M\u1ed9t m\u1ea3ng c\u00e1p quang \u0111\u00f4 th\u1ecb d\u00e0i 100 km theo d\u00f5i c\u00e1c c\u01a1n \u0111\u1ecba ch\u1ea5n nh\u1ecf v\u1edbi ph\u1ea3n h\u1ed3i t\u1ea7n s\u1ed1 kHz, cung c\u1ea5p c\u1ea3nh b\u00e1o s\u1edbm v\u1ec1 \u0111\u1ed9ng \u0111\u1ea5t.<\/li>\n\n\n\n<li>K\u1ebft qu\u1ea3: C\u1ea3i thi\u1ec7n th\u1eddi gian ph\u1ea3n h\u1ed3i th\u00eam 10 gi\u00e2y, n\u00e2ng cao an to\u00e0n c\u00f4ng c\u1ed9ng.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>An ninh bi\u00ean gi\u1edbi \u1edf Ch\u00e2u \u00c2u<\/strong>\n<ul class=\"wp-block-list\">\n<li>H\u1ec7 th\u1ed1ng c\u00e1p quang ch\u00f4n s\u00e2u 40 km \u0111\u00e3 ph\u00e1t hi\u1ec7n ra s\u1ef1 x\u00e2m nh\u1eadp v\u1edbi \u0111\u1ed9 ch\u00ednh x\u00e1c 99%, s\u1eed d\u1ee5ng AI \u0111\u1ec3 ph\u00e2n bi\u1ec7t ti\u1ebfng b\u01b0\u1edbc ch\u00e2n c\u1ee7a con ng\u01b0\u1eddi v\u1edbi \u0111\u1ed9ng v\u1eadt.<\/li>\n\n\n\n<li>K\u1ebft qu\u1ea3: Gi\u1ea3m b\u00e1o \u0111\u1ed9ng gi\u1ea3 xu\u1ed1ng c\u00f2n 40%, t\u1ed1i \u01b0u h\u00f3a vi\u1ec7c ph\u00e2n b\u1ed5 t\u00e0i nguy\u00ean.<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n\n\n\n<h2 class=\"wp-block-heading\">Ph\u1ea7n k\u1ebft lu\u1eadn<\/h2>\n\n\n\n<p>C\u1ea3m bi\u1ebfn \u00c2m thanh Ph\u00e2n t\u00e1n (Distributed Acoustic Sensing) bi\u1ebfn \u0111\u1ed5i s\u1ee3i quang th\u00e0nh c\u00e1c c\u1ea3m bi\u1ebfn ph\u00e2n t\u00e1n m\u1ea1nh m\u1ebd, cho ph\u00e9p ph\u00e1t hi\u1ec7n rung \u0111\u1ed9ng v\u1edbi \u0111\u1ed9 ph\u00e2n gi\u1ea3i h\u00e0ng m\u00e9t tr\u00ean ph\u1ea1m vi h\u00e0ng ch\u1ee5c km. Nguy\u00ean l\u00fd c\u1ee7a n\u00f3, d\u1ef1a tr\u00ean t\u00e1n x\u1ea1 ng\u01b0\u1ee3c Rayleigh v\u00e0 ph\u00e2n t\u00edch pha, cho ph\u00e9p \u1ee9ng d\u1ee5ng trong d\u1ea7u kh\u00ed, \u0111\u1ecba ch\u1ea5n h\u1ecdc, c\u01a1 s\u1edf h\u1ea1 t\u1ea7ng, an ninh v\u00e0 m\u00f4i tr\u01b0\u1eddng bi\u1ec3n. M\u1eb7c d\u00f9 v\u1eabn c\u00f2n t\u1ed3n t\u1ea1i nh\u1eefng th\u00e1ch th\u1ee9c nh\u01b0 nhi\u1ec5u v\u00e0 qu\u00e1 t\u1ea3i d\u1eef li\u1ec7u, c\u00e1c gi\u1ea3i ph\u00e1p nh\u01b0 AI v\u00e0 h\u1ec7 th\u1ed1ng lai \u0111ang th\u00fac \u0111\u1ea9y c\u00f4ng ngh\u1ec7 n\u00e0y. C\u00e1c xu h\u01b0\u1edbng trong t\u01b0\u01a1ng lai, bao g\u1ed3m c\u1ea3i ti\u1ebfn l\u01b0\u1ee3ng t\u1eed v\u00e0 c\u1ea3m bi\u1ebfn \u0111a ph\u01b0\u01a1ng th\u1ee9c, h\u1ee9a h\u1eb9n nh\u1eefng kh\u1ea3 n\u0103ng v\u01b0\u1ee3t tr\u1ed9i h\u01a1n n\u1eefa. \u0110\u1ec3 t\u00ecm hi\u1ec3u th\u00eam v\u1ec1 c\u00e1c gi\u1ea3i ph\u00e1p h\u1ed7 tr\u1ee3 DAS, h\u00e3y kh\u00e1m ph\u00e1 CommMesh.<\/p>","protected":false},"excerpt":{"rendered":"<p>C\u1ea3m bi\u1ebfn \u00c2m thanh Ph\u00e2n t\u00e1n (DAS) \u0111\u00e3 n\u1ed5i l\u00ean nh\u01b0 m\u1ed9t c\u00f4ng ngh\u1ec7 mang t\u00ednh c\u00e1ch m\u1ea1ng trong l\u0129nh v\u1ef1c c\u1ea3m bi\u1ebfn v\u00e0 gi\u00e1m s\u00e1t, t\u1eadn d\u1ee5ng s\u1ee9c m\u1ea1nh c\u1ee7a s\u1ee3i quang \u0111\u1ec3 ph\u00e1t hi\u1ec7n rung \u0111\u1ed9ng v\u00e0 t\u00edn hi\u1ec7u \u00e2m thanh t\u1eeb kho\u1ea3ng c\u00e1ch xa v\u1edbi \u0111\u1ed9 ch\u00ednh x\u00e1c ch\u01b0a t\u1eebng c\u00f3. Khi nhu c\u1ea7u v\u1ec1 c\u01a1 s\u1edf h\u1ea1 t\u1ea7ng ng\u00e0y c\u00e0ng t\u0103ng trong c\u00e1c l\u0129nh v\u1ef1c nh\u01b0 n\u0103ng l\u01b0\u1ee3ng, an ninh v\u00e0 gi\u00e1m s\u00e1t m\u00f4i tr\u01b0\u1eddng, DAS mang \u0111\u1ebfn m\u1ed9t gi\u1ea3i ph\u00e1p thay th\u1ebf hi\u1ec7u qu\u1ea3 v\u1ec1 chi ph\u00ed v\u00e0 \u0111\u1ed9 ph\u00e2n gi\u1ea3i cao cho c\u00e1c c\u00f4ng ngh\u1ec7 truy\u1ec1n th\u1ed1ng [\u2026]<\/p>","protected":false},"author":1,"featured_media":4292,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_seopress_robots_primary_cat":"34","_seopress_titles_title":"What Is Distributed Acoustic Sensing (DAS)","_seopress_titles_desc":"","_seopress_robots_index":"","footnotes":""},"categories":[34],"tags":[],"class_list":["post-4289","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"_links":{"self":[{"href":"https:\/\/commmesh.com\/vi\/wp-json\/wp\/v2\/posts\/4289","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/commmesh.com\/vi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/commmesh.com\/vi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/commmesh.com\/vi\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/commmesh.com\/vi\/wp-json\/wp\/v2\/comments?post=4289"}],"version-history":[{"count":6,"href":"https:\/\/commmesh.com\/vi\/wp-json\/wp\/v2\/posts\/4289\/revisions"}],"predecessor-version":[{"id":4437,"href":"https:\/\/commmesh.com\/vi\/wp-json\/wp\/v2\/posts\/4289\/revisions\/4437"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/commmesh.com\/vi\/wp-json\/wp\/v2\/media\/4292"}],"wp:attachment":[{"href":"https:\/\/commmesh.com\/vi\/wp-json\/wp\/v2\/media?parent=4289"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/commmesh.com\/vi\/wp-json\/wp\/v2\/categories?post=4289"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/commmesh.com\/vi\/wp-json\/wp\/v2\/tags?post=4289"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}