HRP20220656T1 - Senzorska jedinica optičkih vlakana, optički mjerni sustav, uređaj za brojanje osovina, postupak brojanja osovina - Google Patents
Senzorska jedinica optičkih vlakana, optički mjerni sustav, uređaj za brojanje osovina, postupak brojanja osovina Download PDFInfo
- Publication number
- HRP20220656T1 HRP20220656T1 HRP20220656TT HRP20220656T HRP20220656T1 HR P20220656 T1 HRP20220656 T1 HR P20220656T1 HR P20220656T T HRP20220656T T HR P20220656TT HR P20220656 T HRP20220656 T HR P20220656T HR P20220656 T1 HRP20220656 T1 HR P20220656T1
- Authority
- HR
- Croatia
- Prior art keywords
- sensor
- fiber
- optical
- optical fiber
- strain
- Prior art date
Links
- 239000000835 fiber Substances 0.000 title claims 33
- 230000003287 optical effect Effects 0.000 title claims 12
- 238000000034 method Methods 0.000 title claims 5
- 239000013307 optical fiber Substances 0.000 claims 26
- 230000007935 neutral effect Effects 0.000 claims 4
- 230000000630 rising effect Effects 0.000 claims 2
- 230000008878 coupling Effects 0.000 claims 1
- 238000010168 coupling process Methods 0.000 claims 1
- 238000005859 coupling reaction Methods 0.000 claims 1
- 238000005259 measurement Methods 0.000 claims 1
- 230000003595 spectral effect Effects 0.000 claims 1
- 238000001228 spectrum Methods 0.000 claims 1
- 230000007704 transition Effects 0.000 claims 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61K—AUXILIARY EQUIPMENT SPECIALLY ADAPTED FOR RAILWAYS, NOT OTHERWISE PROVIDED FOR
- B61K9/00—Railway vehicle profile gauges; Detecting or indicating overheating of components; Apparatus on locomotives or cars to indicate bad track sections; General design of track recording vehicles
- B61K9/08—Measuring installations for surveying permanent way
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
- G01L1/24—Measuring force or stress, in general by measuring variations of optical properties of material when it is stressed, e.g. by photoelastic stress analysis using infrared, visible light, ultraviolet
- G01L1/242—Measuring force or stress, in general by measuring variations of optical properties of material when it is stressed, e.g. by photoelastic stress analysis using infrared, visible light, ultraviolet the material being an optical fibre
- G01L1/246—Measuring force or stress, in general by measuring variations of optical properties of material when it is stressed, e.g. by photoelastic stress analysis using infrared, visible light, ultraviolet the material being an optical fibre using integrated gratings, e.g. Bragg gratings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
- B61L1/00—Devices along the route controlled by interaction with the vehicle or train
- B61L1/16—Devices for counting axles; Devices for counting vehicles
- B61L1/163—Detection devices
- B61L1/166—Optical
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
- B61L23/00—Control, warning or like safety means along the route or between vehicles or trains
- B61L23/04—Control, warning or like safety means along the route or between vehicles or trains for monitoring the mechanical state of the route
- B61L23/042—Track changes detection
- B61L23/047—Track or rail movements
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/26—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light
- G01D5/32—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light
- G01D5/34—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells
- G01D5/353—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells influencing the transmission properties of an optical fibre
- G01D5/35306—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells influencing the transmission properties of an optical fibre using an interferometer arrangement
- G01D5/35309—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells influencing the transmission properties of an optical fibre using an interferometer arrangement using multiple waves interferometer
- G01D5/35316—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells influencing the transmission properties of an optical fibre using an interferometer arrangement using multiple waves interferometer using a Bragg gratings
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M5/00—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings
- G01M5/0025—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings of elongated objects, e.g. pipes, masts, towers or railways
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M5/00—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings
- G01M5/0091—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings by using electromagnetic excitation or detection
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Aviation & Aerospace Engineering (AREA)
- Mechanical Engineering (AREA)
- Electromagnetism (AREA)
- Automation & Control Theory (AREA)
- Optical Transform (AREA)
- Length Measuring Devices By Optical Means (AREA)
- Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
- Machines For Laying And Maintaining Railways (AREA)
Claims (17)
1. Senzorska jedinica optičkih vlakana (1a; 1b; 1c) za detekciju mehaničke sile koja djeluje na tračnicu (15) sadrži:
najmanje prvo senzorsko vlakno (2, 3; 10),
prvi produženi senzor naprezanja optičkih vlakana (4) i drugi produženi senzor naprezanja optičkih vlakana (5),
pri čemu prvo senzorsko vlakno (2; 10) sadrži prvi senzor naprezanja (4), pri čemu su optički senzori naprezanja (4, 5) vlaknaste Braggove rešetke,
pri čemu su obje vlaknaste Braggove rešetke od vlakana upisane u jedno senzorsko vlakno (10) ili je svaka Braggova rešetka od vlakana upisana u zasebno senzorsko vlakno (2, 3),
naznačena time
što je najmanje jedno senzorsko vlakno (2, 3; 10) pričvršćeno na senzorsku ploču (6), i
što su prvi senzor naprezanja vlakana (4) i drugi senzor naprezanja (5) raspoređeni u geometriji tipa x ili tipa v, pri čemu su prvi senzor naprezanja (4) i drugi senzor naprezanja (5) raspoređeni pod kutom od 60° do 120°, posebno od 90°, jedan prema drugome, te
što senzorska ploča ima udubljenje (9, 9a, 9b), pri čemu najmanje jedno vlakno proteže udubljenje (9, 9a, 9b) tako da su senzori naprezanja slobodno postavljeni unutar udubljenja (9, 9a, 9b) bez kontakta sa senzorskom pločom.
2. Senzorska jedinica optičkih vlakana (1a; 1b) prema zahtjevu 1, naznačena time što su prvi senzor naprezanja (4) i drugi senzor naprezanja (5) raspoređeni u geometriji tipa x, i pri čemu su senzori naprezanja (4, 5) međusobno udaljeni u smjeru okomitom na uzdužne nastavke senzora naprezanja (4, 5).
3. Senzorska jedinica optičkih vlakana (1a; 1b; 1c) prema jednom od prethodnih zahtjeva, naznačena time što senzorska ploča (6) sadrži najmanje jedan utor (7, 8; 11) u kojem se nalazi najmanje jedno senzorsko vlakno (2, 3; 10) koji je u prilogu.
4. Senzorska jedinica optičkih vlakana (1a; 1b; 1c) prema zahtjevu 3, naznačena time što je najmanje jedan utor (7, 8; 11) urezan.
5. Senzorska jedinica optičkih vlakana (1a; 1b) prema zahtjevu 3 ili 4, naznačena time što su prvi utor (7, 8) i drugi utor dio iste senzorske ploče, pri čemu su dva utora (7, 8) na različitoj razini visine senzorske ploče (6).
6. Senzorska jedinica optičkih vlakana (1b, 1c) prema bilo kojem od zahtjeva 1 do 5, naznačena time što senzorsko vlakno (10) sadrži obje, prvu vlaknastu Braggovu rešetku (4) kao i drugu vlaknastu Braggovu rešetku (5).
7. Senzorska jedinica optičkih vlakana (1a) prema bilo kojem od zahtjeva 1 do 5, naznačena time što senzorska jedinica optičkih vlakana sadrži dva senzorska vlakna (2, 3), svaka vlaknasta Braggova rešetka (4, 5) je dio zasebnog senzorskog vlakna (2, 3).
8. Jedinica optičkog senzora prema bilo kojem od prethodnih zahtjeva, naznačena time što je senzorska ploča (6) pričvršćena na osnovnu ploču za montažu optičkog senzora na tračnicu, pri čemu osnovna ploča ima kontinuiranu donju ravninu.
9. Senzorska jedinica optičkih vlakana prema bilo kojem od prethodnih zahtjeva, naznačena time što senzorska ploča (6) uključuje mehaničko pojačalo, koje prenosi i umnožava izmjenu duljine od tračnice do vlaknaste Braggove rešetke.
10. Optički mjerni sustav za mjerenje posmičnog naprezanja tračnice (15), sustav sadrži:
tračnica (15) koja ima uzdužni nastavak i neutralnu os (16), koja se proteže duž uzdužnog nastavka,
senzorska jedinica optičkih vlakana (1a; 1b; 1c) prema jednom od prethodnih zahtjeva za detekciju optičkih signala u ovisnosti o posmičnoj deformaciji djelujući na tračnicu (15), pri čemu je senzorska jedinica optičkih vlakana (1a; 1b; 1c) postavljena na šinu (15) tako da su vlaknaste Braggove rešetke ukošeno orijentirane u odnosu na neutralnu os (16),
izvor svjetlosti (18) koji je prilagođen za spajanje svjetlosti u senzorska vlakna (2, 3; 10) senzorske jedinice optičkih vlakana, i
jedinica za obradu signala (20) za obradu signala detektiranih od strane senzorske jedinice optičkih vlakana (1a; 1b; 1c).
11. Optički mjerni sustav prema zahtjevu 10, naznačen time što jedinica za obradu signala (20) sadrži rubni filtar s padajućim rubom i podižućim rubom, te da prva vlaknasta Braggova rešetka (4) ima Braggovu valnu duljinu na podižućem rubu i druga vlaknasta Braggova rešetka (5) ima Braggovu valnu duljinu na padajućem rubu rubnog filtra.
12. Optički mjerni sustav prema zahtjevima 10 do 11, naznačen time što su senzori naprezanja (4, 5) postavljeni simetrično prema ravnini koja se sastoji od neutralne osi (16) tračnice (15).
13. Optički mjerni sustav prema bilo kojem od zahtjeva 10 do 12, naznačen time što su senzori deformacije (4, 5) postavljeni simetrično na ravninu okomitu na neutralnu os (16) tračnice.
14. Uređaj za brojanje osovina koji sadrži najmanje jedan izvor svjetlosti (18) i najmanje jednu jedinicu za brojanje (19), pri čemu svaka jedinica za brojanje (19) sadrži najmanje jednu senzorsku jedinicu optičkih vlakana (1a; 1b; 1c) prema bilo kojem od zahtjeva 1 do 9, pri čemu je najmanje jedna senzorska jedinica optičkih vlakana (1a; 1b; 1c) prilagođena za montažu na tračnicu (15), i jedinica za obradu signala (20), pri čemu je izvor svjetlosti (18) prilagođen za spajanje svjetlosti u senzorska vlakna (2, 3,; 10) senzorske jedinice optičkih vlakana (1a; 1b; 1c).
15. Postupak brojanja osovina za željeznička vozila, sadrži sljedeće korake postupka:
a) spajanje, preko najmanje jednog senzorskog vlakna (2, 3,; 10), svjetlosti u prvi i drugi optički senzor naprezanja (4, 5) koji su vlaknaste Braggove rešetke senzorske jedinice optičkih vlakana (1a; 1b; 1c) koja je pričvršćena na tračnicu (15),
b) detektiranje svjetlosti reflektirane od prvog i drugog senzora naprezanja optičkih vlakana (4, 5), rezultat čega je primanje signala posmičnog naprezanja tračnice (15) u svakom slučaju, pri čemu svaki senzor naprezanja optičkih vlakana (4, 5) ima refleksijski spektar koji ima vrh refleksije (P1, P2) koji je na Braggovoj valnoj duljini λ1, λ2 i ima punu širinu pri pola maksimuma (FWHM),
c) generiranje signala razlike posmičnog naprezanja iz dva primljena signala posmičnog naprezanja;
d) generiranje signala kotača unutar jedinice za obradu signala ako signal razlike posmičnog naprezanja premašuje unaprijed određenu gornju graničnu vrijednost ili padne ispod unaprijed određene donje granične vrijednosti,
naznačen time što
optički senzori naprezanja (4, 5) koji se koriste raspoređeni su u geometriji tipa x ili tipa v, pri čemu su prvi senzor naprezanja (4) i drugi senzor naprezanja (5) postavljeni pod kutom od 60° do 120°, posebno od 90°, jedan prema drugom, pri čemu su ili obje vlaknaste Braggove rešetke upisane u jedno senzorsko vlakno (10) ili svaka od vlaknaste Braggove rešetke je upisana u zasebno senzorsko vlakno (2, 3), pri čemu senzorska ploča sadrži udubljenje (9, 9a, 9b), pri čemu se najmanje jedno vlakno proteže kroz udubljenje (9, 9a, 9b) tako da su senzori naprezanja slobodno postavljeni unutar udubljenja (9, 9a, 9b) bez kontakta sa senzorskom pločom, i
pri čemu je puna širina na pola maksimuma (FWHM) vrha refleksije (P1, P2) prvog optičkog senzora deformacije (4) i drugog senzora naprezanja optičkih vlakana (5) odstupaju jedan od drugog za najviše 200%.
16. Postupak brojanja osovina prema zahtjevu 15, naznačen time
što senzorsko vlakno (10) koje se koristi sadrži oba, prvi i drugi senzor naprezanja optičkih vlakana (4, 5), prvi i drugi optički senzor naprezanja (4, 5) su raspoređeni u nizu i imaju različite Braggove valne duljine (λ1, λ2), i
što je signal razlike posmičnog naprezanja optički generiran spektralnim preklapanjem refleksijskih vrhova (P1, P2) dva senzora naprezanja optičkih vlakana (4, 5) tijekom prijelaza iz neopterećenog stanja u opterećeno stanje.
17. Postupak brojanja osovina prema zahtjevu 15 ili 16, naznačen time što se koraci postupka od a) do d) izvode s dodatnom senzorskom jedinicom optičkih vlakana (1a; 1b; 1c) koja je pričvršćena na drugu tračnicu kolosijeka pri čemu su dvije senzorske jedinice optičkih vlakana razmaknute jedna od druge u smjeru tračnice.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP19162729.8A EP3708990B1 (en) | 2019-03-14 | 2019-03-14 | Fiber optic sensor unit, optical measuring system, axle-counting device, axle-counting method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| HRP20220656T1 true HRP20220656T1 (hr) | 2022-06-24 |
Family
ID=65812145
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| HRP20220656TT HRP20220656T1 (hr) | 2019-03-14 | 2019-03-14 | Senzorska jedinica optičkih vlakana, optički mjerni sustav, uređaj za brojanje osovina, postupak brojanja osovina |
Country Status (15)
| Country | Link |
|---|---|
| US (1) | US20210403059A1 (hr) |
| EP (1) | EP3708990B1 (hr) |
| JP (1) | JP2022524187A (hr) |
| KR (1) | KR20210135595A (hr) |
| CN (1) | CN113661385B (hr) |
| AU (1) | AU2020235348A1 (hr) |
| CA (1) | CA3131823A1 (hr) |
| DK (1) | DK3708990T3 (hr) |
| ES (1) | ES2914115T3 (hr) |
| HR (1) | HRP20220656T1 (hr) |
| PL (1) | PL3708990T3 (hr) |
| PT (1) | PT3708990T (hr) |
| RS (1) | RS63214B1 (hr) |
| SI (1) | SI3708990T1 (hr) |
| WO (1) | WO2020182876A1 (hr) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112629427B (zh) * | 2020-11-27 | 2022-06-17 | 山东航天电子技术研究所 | 一种用于航天器应变测量的光纤传感系统 |
| CN112833809B (zh) * | 2021-01-13 | 2022-06-28 | 苏州热工研究院有限公司 | 一种光纤光栅高温应变片及其标定方法 |
| CN113335338B (zh) * | 2021-06-30 | 2023-01-20 | 北京全路通信信号研究设计院集团有限公司 | 一种计轴用轮轨耦合垂向力检测装置及计轴方法 |
| CN116080706B (zh) * | 2023-03-06 | 2023-06-30 | 北京全路通信信号研究设计院集团有限公司 | 一种光纤光栅传感器计轴方法、系统、设备和存储介质 |
Family Cites Families (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6668105B2 (en) * | 2000-07-27 | 2003-12-23 | Systems Planning & Analysis, Inc. | Fiber optic strain sensor |
| NO334515B1 (no) * | 2002-03-13 | 2014-03-31 | Light Structures As | Fiberoptisk sensorpakke |
| DE602004021377D1 (de) * | 2004-08-27 | 2009-07-16 | Schlumberger Holdings | Sensor und Vermessungsvorrichtung zur Bestimmung des Biegeradius und der Form eines Rohrleitungs |
| US20060202860A1 (en) * | 2005-03-10 | 2006-09-14 | Fibera, Inc. | Fiber optic track circuit |
| JP4897445B2 (ja) * | 2006-11-28 | 2012-03-14 | 株式会社共和電業 | 光ファイバ式ひずみゲージ |
| EP2056086A1 (de) * | 2007-11-05 | 2009-05-06 | Technische Universität München | Kraft-Momenten-Sensor |
| DE102008014644A1 (de) * | 2008-03-17 | 2009-10-01 | Siemens Aktiengesellschaft | Antriebswelle für eine Propellergondel mit Sensorik |
| US8547534B2 (en) * | 2009-09-03 | 2013-10-01 | Honda Motor Co., Ltd. | Optical fiber sensor, pressure sensor, end effector and sensor signal processor |
| US9267854B2 (en) * | 2010-09-20 | 2016-02-23 | Indian Institue of Science | Strain and temperature discrimination using fiber bragg gratings in a cross-wire configuration |
| US8701500B2 (en) * | 2011-12-02 | 2014-04-22 | Lake Shore Cryotronics, Inc. | Method and apparatus for fixing strained optical fibers against creep and temperature and strain sensors using said technology |
| DE102014100653B4 (de) * | 2014-01-21 | 2016-01-21 | fos4X GmbH | Schienenmesssystem |
| PT3069952T (pt) * | 2015-03-20 | 2017-07-14 | Thales Deutschland Gmbh | Processo para a produção de um painel de vidro com um revestimento condutor de eletricidade com defeitos isolados eletricamente |
| DE102015115925B3 (de) * | 2015-09-21 | 2016-12-08 | fos4X GmbH | Lichtleiter-Einspannvorrichtung, faseroptischer Sensor und Herstellungsverfahren |
| US20170122826A1 (en) * | 2015-10-30 | 2017-05-04 | Wicor Holding Ag | Sensors Having Multiple Fiber-Grating Sensing Elements That Provide Differing Responses to an Environmental Input and Related Systems and Methods |
| AU2015401228A1 (en) * | 2015-11-14 | 2017-06-01 | Beijing Oriental Railway Technology Development Co.,Ltd | Optical fiber detection device with steel rail as elastomer and railway overload and unbalanced load detection system |
-
2019
- 2019-03-14 RS RS20220466A patent/RS63214B1/sr unknown
- 2019-03-14 HR HRP20220656TT patent/HRP20220656T1/hr unknown
- 2019-03-14 EP EP19162729.8A patent/EP3708990B1/en active Active
- 2019-03-14 ES ES19162729T patent/ES2914115T3/es active Active
- 2019-03-14 DK DK19162729.8T patent/DK3708990T3/da active
- 2019-03-14 PL PL19162729.8T patent/PL3708990T3/pl unknown
- 2019-03-14 SI SI201930239T patent/SI3708990T1/sl unknown
- 2019-03-14 PT PT191627298T patent/PT3708990T/pt unknown
-
2020
- 2020-03-11 JP JP2021552945A patent/JP2022524187A/ja active Pending
- 2020-03-11 CA CA3131823A patent/CA3131823A1/en active Pending
- 2020-03-11 WO PCT/EP2020/056493 patent/WO2020182876A1/en active Application Filing
- 2020-03-11 CN CN202080021074.7A patent/CN113661385B/zh active Active
- 2020-03-11 KR KR1020217032992A patent/KR20210135595A/ko unknown
- 2020-03-11 AU AU2020235348A patent/AU2020235348A1/en active Pending
-
2021
- 2021-09-09 US US17/447,267 patent/US20210403059A1/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| JP2022524187A (ja) | 2022-04-28 |
| RS63214B1 (sr) | 2022-06-30 |
| US20210403059A1 (en) | 2021-12-30 |
| KR20210135595A (ko) | 2021-11-15 |
| CA3131823A1 (en) | 2020-09-17 |
| WO2020182876A1 (en) | 2020-09-17 |
| EP3708990B1 (en) | 2022-04-27 |
| DK3708990T3 (da) | 2022-05-16 |
| CN113661385B (zh) | 2024-05-10 |
| CN113661385A (zh) | 2021-11-16 |
| PT3708990T (pt) | 2022-05-27 |
| ES2914115T3 (es) | 2022-06-07 |
| SI3708990T1 (sl) | 2022-06-30 |
| PL3708990T3 (pl) | 2022-08-01 |
| EP3708990A1 (en) | 2020-09-16 |
| AU2020235348A1 (en) | 2021-08-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| HRP20220656T1 (hr) | Senzorska jedinica optičkih vlakana, optički mjerni sustav, uređaj za brojanje osovina, postupak brojanja osovina | |
| JP6719480B2 (ja) | 車軸計数方法及び車軸計数装置 | |
| US8576386B2 (en) | Detecting particulate contaminants in a fluid | |
| JP6560238B2 (ja) | 光ファイバセンサユニットの使用方法及び取り付け方法、並びに、レール測定システム | |
| US6175108B1 (en) | Accelerometer featuring fiber optic bragg grating sensor for providing multiplexed multi-axis acceleration sensing | |
| CN101087989B (zh) | 可嵌入的偏振光纤传感器及监测结构的方法 | |
| US6674928B2 (en) | Optical sensing device containing fiber Bragg gratings | |
| GB0712158D0 (en) | Structural joint strain monitoring apparatus and system | |
| CA2695587A1 (en) | Physical quantity measuring apparatus utilizing optical frequency domain reflectometry and method for temperature and strain measurement using the apparatus | |
| US9689714B2 (en) | Multiplexed fiber-coupled fabry-perot sensors and method therefor | |
| JP2936352B2 (ja) | 光ファイバをセンサとして使用するための方法 | |
| KR101314857B1 (ko) | 변형률 측정 모듈 및 이를 결합한 변형률 측정 장치 | |
| EP3710787B1 (en) | A fibre optic sensing device | |
| FR2909446B1 (fr) | Dispositif et procede de mesure des deformations mecaniques d'un profile | |
| CN203231735U (zh) | 一种基于波长可调谐激光器的高空间分辨率光纤传感系统 | |
| CN103245299B (zh) | 一种基于波长可调谐激光器的高空间分辨率光纤传感系统 | |
| JPWO2022044612A5 (ja) | 環境情報取得システム及び環境情報取得方法 | |
| SU636491A1 (ru) | Чувствительный элемент пьезооптического преобразовател | |
| Todd et al. | Optical Sensing Device Containing Fiber Bragg Gratings | |
| Li et al. | FBG tread wear detecting lines |