CN101285700A - Piston type optical fibre grating sonic device - Google Patents
Piston type optical fibre grating sonic device Download PDFInfo
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- CN101285700A CN101285700A CNA2007100653243A CN200710065324A CN101285700A CN 101285700 A CN101285700 A CN 101285700A CN A2007100653243 A CNA2007100653243 A CN A2007100653243A CN 200710065324 A CN200710065324 A CN 200710065324A CN 101285700 A CN101285700 A CN 101285700A
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Abstract
The invention relates to the fiber sensor technical field and discloses a plunger type fiber raster hydrophone. The fiber raster hydrophone comprises a support cylinder, a protective sleeve, a first piston, a second piston and a fiber raster, wherein, the support cylinder is used as a main body of the hydrophone; the protective sleeve is sleeved on the surface of the support cylinder and used for protecting the support cylinder and an inner structure of the support cylinder; the first piston and the second piston are symmetrically arranged inside the support cylinder and used for sensing pressure and producing displacement along the normal directions of the pistons under the action of the pressure; and the fiber raster for measuring underwater sound pressure is arranged inside the support cylinder and runs through the first piston and the second piston. When the plunger type fiber raster hydrophone is utilized, the plunger type fiber raster hydrophone improves high-sensitivity and can operate in different hydrostatic environments.
Description
Technical field
The present invention relates to the fiber optic sensor technology field, relate in particular to a kind of novel piston type optical fibre grating sonic device.
Background technology
Fibre Optical Sensor is compared with corresponding conventional sensors, has remarkable advantages at aspects such as sensitivity, dynamic range, reliabilities, seems particularly outstanding in national defence, Military Application field, is classified as the defense technology of giving priority to by many countries.
Fibre optic hydrophone is all mudulation effects of utilizing the biography light characteristic of optical fiber and it and surrounding environment to interact and produce, surveys the instrument of signals such as pressure, sound in the liquid.It is compared with traditional piezoelectric type sensor, and following main advantage is arranged: bandwidth, sound pressure sensitivity height, be not subjected to electromagnetic interference (EMI), in light weight, can be designed to arbitrary shape, and have information sensing concurrently and optical information is transmitted in advantages such as the whole body.
In view of the as above technical advantage of fibre optic hydrophone, can satisfy of the requirement of each developed country in fields such as oil, military affairs, actively launched research at present in this regard.In common intensity modulation type, digital, fiber Bragg grating type fibre optic hydrophone, the fiber Bragg grating type nautical receiving set is present main direction of studying.
People such as Zheng Chengdong have reported a kind of optical fiber grating sonic device, are the methods that adopts in the metal cylinder that fiber grating is encapsulated in an end opening.The polymeric material that embedding is arranged in the metal cylinder, and only bear the pressure of metal cylinder opening direction.Do the time spent as acoustic pressure, polymkeric substance shrinks, and drives fiber grating and produces strain, thereby detect pressure.The optical fiber pressure sensor of Zhi Zuoing has not only limited the sensitivity of nautical receiving set because the fiber grating pressurized makes fiber grating produce easily and warbles and bending like this, also influences the detection of signal simultaneously.Only by polymkeric substance opposing static pressure itself, the static pressure that can bear is limited, is unsuitable for darker environmental work for this optical fiber grating sonic device simultaneously.
Therefore, how improving the pressure survey sensitivity of nautical receiving set and make nautical receiving set can be operated in the different degree of depth, is the essential important technological problems that solves of optical fiber grating sonic device large-scale application.
Summary of the invention
(1) technical matters that will solve
In view of this, fundamental purpose of the present invention is to provide a kind of piston type optical fibre grating sonic device, with the high sensitivity of raising optical fiber grating sonic device, and nautical receiving set can be worked under different static pressure environment.
(2) technical scheme
For achieving the above object, technical scheme of the present invention is achieved in that
A kind of piston type optical fibre grating sonic device, this optical fiber grating sonic device comprises:
Be sleeved on the protection sleeve 20 on support tube 10 surfaces, be used to protect the structure of support tube 10 and support tube 10 inside;
Symmetry is installed in the first piston and second piston 40 of described support tube 10 inside, is used to experience pressure and produces displacement in the normal orientation of pressure action lower edge piston;
It is inner and run through the fiber grating 30 of the described first piston and second piston to be installed on described support tube 10, is used to measure the underwater sound and presses.
This optical fiber grating sonic device further includes the hole 12 that the pectination rotational symmetry distributes vertically at support tube 10 sidewalls at the middle part, be used to the intermediate cavity 13 that makes extraneous acoustic pressure enter the nautical receiving set support tube, and act on the first piston and second piston 40.
In the such scheme, described support tube 10 is an axial symmetrical structure, and support tube 10 both ends central authorities have hole 11, are used to draw the tail optical fiber of fiber grating 30 and are used for packing matcrial.
In the such scheme, the described first piston and second piston 40 are made by rubber, plastics, metal or compound substance, central authorities in its relative one side further are equipped with hard center 41, are used to improve the equivalent stiffness of piston, increase the strain in fiber grating 30 that is caused by hydraulic pressure.
In the such scheme, described fiber grating 30 passes the central authorities at first piston, second piston 40 and hard center 41 and fixes by bonding mode with first piston, second piston 40, has certain initial tension in the fiber grating 30.
In the such scheme, the rigidity at described hard center 41 is much larger than the rigidity of piston 40.
In the such scheme, the part in the described support tube 10 between the first piston and second piston is an intermediate cavity 13, and full of liquid in the intermediate cavity 13 is used to transmit acoustic pressure.
In the such scheme, the intermediate cavity 13 of described support tube 10 becomes a closed chamber by protection sleeve 20, and the liquid that is full of in this closed chamber is water or oil.
In the such scheme, part in the described support tube 10 between the first piston or second piston and support tube 10 two ends is the side chamber, the side chamber is a closed chamber, wherein be the gas under the normal pressure, or be evacuated or the partial vacuum, the mobile space that provides of the first piston or second piston is provided, increases the sensitivity of nautical receiving set.
In the such scheme, described protection sleeve 20 is the acoustic window material manufacturing, has certain rigidity, is used to resist certain hydrostatic force, makes optical fiber grating sonic device be operated in water-bed depths.
(3) beneficial effect
From technique scheme as can be seen, the present invention has following beneficial effect:
1, this piston type optical fibre grating sonic device provided by the invention, by piston water is acted on the axial stress that axial pressure on the piston changes fiber grating into, this axial stress connects the axial stress that is produced when acting on the fiber grating much larger than underwater sound straightening, has improved the high sensitivity of optical fiber grating sonic device.
2, this piston type optical fibre grating sonic device provided by the invention, the method by the encapsulation of tubular type polymer elastomer reduces the volume of optical fiber grating sonic device to a great extent.In the technical program, the external diameter of support tube can be less than 10mm.
3, this piston type optical fibre grating sonic device provided by the invention because the protection sleeve that adopts can bear bigger static pressure, is used for the balance hydrostatic force, so can make the nautical receiving set can be darker environmental work.
Description of drawings
Fig. 1 is the section of structure of piston type optical fibre grating sonic device provided by the invention.
Fig. 2 is the middle part sectional side view of piston type optical fibre grating sonic device provided by the invention.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, below in conjunction with specific embodiment, and with reference to accompanying drawing, the present invention is described in more detail.
As depicted in figs. 1 and 2, Fig. 1 is the section of structure of piston type optical fibre grating sonic device provided by the invention, and Fig. 2 is the middle part sectional side view of piston type optical fibre grating sonic device provided by the invention.
This optical fiber grating sonic device comprises: as the support tube 10 of nautical receiving set main body; Be sleeved on the protection sleeve 20 on support tube 10 surfaces, be used to protect the structure of support tube 10 and support tube 10 inside; Symmetry is installed in the first piston and second piston 40 of described support tube 10 inside, is used to experience pressure and produces displacement in the normal orientation of pressure action lower edge piston; It is inner and run through the fiber grating 30 of the described first piston and second piston to be installed on described support tube 10, is used to measure the underwater sound and presses.
This optical fiber grating sonic device further includes the hole 12 that the pectination rotational symmetry distributes vertically at support tube 10 sidewalls at the middle part, be used to the intermediate cavity 13 that makes extraneous acoustic pressure enter the nautical receiving set support tube, and act on the first piston and second piston 40.
The first piston and second piston 40 are made by rubber, plastics, metal or other compound substance, the central authorities of relative in the central one side further are equipped with hard center 41, be used to improve the equivalent stiffness of piston, increase the strain in fiber grating 30 that causes by hydraulic pressure.The rigidity at hard center 41 should so just can improve the equivalent stiffness of piston much larger than the rigidity of piston 40.
Fiber grating 30 passes the central authorities at first piston, second piston (40) and hard center (41) and fixes by bonding mode with first piston, second piston 40, generally have certain initial tension in the fiber grating 30, this initial tension can make fiber grating 30 keep tensioning state.
Part in the support tube 10 between the first piston and second piston is an intermediate cavity 13, and full of liquid in the intermediate cavity 13 is used to transmit acoustic pressure.
The intermediate cavity 13 of support tube 10 becomes a closed chamber by protection sleeve 20, and the liquid that is full of in this closed chamber is water, wet goods.
Part in the support tube 10 between the first piston or second piston and support tube 10 two ends is the side chamber, the side chamber is a closed chamber, wherein is to be evacuated the gas under the normal pressure or the partial vacuum state, the mobile space that provides of the first piston or second piston is provided, increases the sensitivity of nautical receiving set.
The principle of work of this piston type optical fibre grating sonic device provided by the invention is as follows: when this optical fiber grating sonic device places water (or other liquid); sound field in the water can see through protection sleeve 20 and be coupled in the intermediate cavity 13 of nautical receiving set support tube 10; and by the liquid effects in the intermediate cavity 13 on the end face at piston 40 and hard center 41, thereby press piston 40 and hard center 41 produces displacement to the direction of both ends of support tube 10.The rigidity at hard center 41 is greater than the rigidity of piston 40, thus can overcome the distortion of the piston 40 that the pressure owing to fiber grating 30 causes, thus increased the equivalent stiffness of piston 40.Because piston 40 and fiber grating 30 are adhesively fixed, produce strain thereby drive fiber grating.For fiber grating, so the variable quantity of its reflection wavelength and strained being directly proportional are by detecting the size that the wavelength change amount can obtain outside pressure.
In addition, can be by regulating the external diameter of support tube 10, the parameters such as radius at piston 40 and hard center 41 wait the sensitivity of regulating optical fiber grating sonic device.
Above-described specific embodiment; purpose of the present invention, technical scheme and beneficial effect are further described; institute is understood that; the above only is specific embodiments of the invention; be not limited to the present invention; within the spirit and principles in the present invention all, any modification of being made, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1, a kind of piston type optical fibre grating sonic device is characterized in that, this optical fiber grating sonic device comprises:
Support tube (10) as the nautical receiving set main body;
Be sleeved on the protection sleeve (20) on support tube (10) surface, be used to protect support tube (10) and the inner structure of support tube (10);
Symmetry is installed in described support tube (10) inner first piston and second piston (40), is used to experience pressure and produces displacement in the normal orientation of pressure action lower edge piston;
It is inner and run through the fiber grating (30) of the described first piston and second piston to be installed on described support tube (10), is used to measure the underwater sound and presses.
2, piston type optical fibre grating sonic device according to claim 1, it is characterized in that, this optical fiber grating sonic device further includes the hole (12) that the pectination rotational symmetry distributes vertically at support tube (10) sidewall at the middle part, be used to the intermediate cavity (13) that makes extraneous acoustic pressure enter the nautical receiving set support tube, and act on first piston and second piston (40).
3, piston type optical fibre grating sonic device according to claim 1, it is characterized in that, described support tube (10) is an axial symmetrical structure, and support tube (10) both ends central authorities have hole (11), is used to draw the tail optical fiber of fiber grating (30) and be used for packing matcrial.
4, piston type optical fibre grating sonic device according to claim 1, it is characterized in that, described first piston and second piston (40) are made by rubber, plastics, metal or compound substance, central authorities in its relative one side further are equipped with hard center (41), be used to improve the equivalent stiffness of piston, increase the strain in fiber grating (30) that causes by hydraulic pressure.
5, piston type optical fibre grating sonic device according to claim 1, it is characterized in that, described fiber grating (30) passes the central authorities at first piston, second piston (40) and hard center (41) and fixes by bonding mode with first piston, second piston (40), has certain initial tension in the fiber grating (30).
According to each described piston type optical fibre grating sonic device in the claim 1,4 and 5, it is characterized in that 6, the rigidity at described hard center (41) is much larger than the rigidity of piston (40).
7, piston type optical fibre grating sonic device according to claim 1 is characterized in that, the part in the described support tube (10) between the first piston and second piston is intermediate cavity (13), and full of liquid in the intermediate cavity (13) is used to transmit acoustic pressure.
8, piston type optical fibre grating sonic device according to claim 6 is characterized in that, the intermediate cavity (13) of described support tube (10) becomes a closed chamber by protection sleeve (20), and the liquid that is full of in this closed chamber is water or oil.
9, piston type optical fibre grating sonic device according to claim 1, it is characterized in that, part in the described support tube (10) between first piston or second piston and support tube (10) two ends is the side chamber, the side chamber is a closed chamber, wherein be the gas under the normal pressure, or be evacuated or the partial vacuum, the mobile space that provides of the first piston or second piston is provided, increase the sensitivity of nautical receiving set.
10, piston type optical fibre grating sonic device according to claim 1; it is characterized in that described protection sleeve (20) is the acoustic window material manufacturing, has certain rigidity; be used to resist certain hydrostatic force, make optical fiber grating sonic device be operated in water-bed depths.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200710065324A CN100587415C (en) | 2007-04-11 | 2007-04-11 | Piston type optical fibre grating sonic device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200710065324A CN100587415C (en) | 2007-04-11 | 2007-04-11 | Piston type optical fibre grating sonic device |
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| CN101285700A true CN101285700A (en) | 2008-10-15 |
| CN100587415C CN100587415C (en) | 2010-02-03 |
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| CN200710065324A Expired - Fee Related CN100587415C (en) | 2007-04-11 | 2007-04-11 | Piston type optical fibre grating sonic device |
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Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102196349A (en) * | 2011-03-21 | 2011-09-21 | 中国科学院半导体研究所 | Fiber microphone with band-pass sound filter function |
| CN101660939B (en) * | 2009-09-25 | 2012-06-06 | 暨南大学 | Optical fiber sound pressure sensor |
| CN103492842A (en) * | 2011-04-14 | 2014-01-01 | 泰勒斯公司 | All-optical hydrophone that is not sensitive to temperature or static pressure |
| CN104932019A (en) * | 2014-01-31 | 2015-09-23 | Pgs地球物理公司 | Hydrophone |
| CN105115586A (en) * | 2015-05-28 | 2015-12-02 | 北京航天控制仪器研究所 | Self-balancing static-pressure resistant air-back mandrel-type interference fiber hydrophone probe |
| CN105940286A (en) * | 2013-08-16 | 2016-09-14 | 辉固技术有限公司 | Sensor for detecting pressure waves in liquid |
| CN106595509A (en) * | 2016-12-27 | 2017-04-26 | 中国神华能源股份有限公司 | Fiber grating type sensor |
| CN109839514A (en) * | 2019-03-19 | 2019-06-04 | 合肥工业大学 | A kind of high-precision optical accelerometer with from zeroing function |
| CN111337117A (en) * | 2020-04-14 | 2020-06-26 | 青岛海洋科学与技术国家实验室发展中心 | Optical fiber laser hydrophone |
| CN112629641A (en) * | 2020-11-30 | 2021-04-09 | 中山市精量光电子科技有限公司 | Flywheel-shaped diaphragm type high-sensitivity standard hydrophone and method |
| CN112924013A (en) * | 2021-01-28 | 2021-06-08 | 哈尔滨工程大学 | Acceleration-resistant optical fiber hydrophone probe device |
| CN113405645A (en) * | 2021-06-08 | 2021-09-17 | 哈尔滨工程大学 | Hydrostatic pressure resistant optical fiber hydrophone based on piston |
| CN114623914A (en) * | 2022-02-28 | 2022-06-14 | 浙江大学 | Fiber grating hydrophone adopting frustum diaphragm and tensile coating |
| CN114623915A (en) * | 2022-02-28 | 2022-06-14 | 浙江大学 | Double-diaphragm fiber grating hydrophone adopting tensile coating for sensitization |
| CN114623913A (en) * | 2022-02-28 | 2022-06-14 | 浙江大学 | Fiber grating hydrophone adopting cymbal-shaped diaphragm and tensile coating |
| CN114623916A (en) * | 2022-02-28 | 2022-06-14 | 浙江大学 | Fiber grating hydrophone adopting double-cone-frustum-shaped diaphragm |
| CN114674411A (en) * | 2022-03-02 | 2022-06-28 | 浙江大学 | Fiber grating hydrophone adopting double cymbals-shaped diaphragms |
| CN115638908A (en) * | 2022-09-30 | 2023-01-24 | 海纳云物联科技有限公司 | Stress monitoring equipment based on fiber grating sensor |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5363342A (en) * | 1988-04-28 | 1994-11-08 | Litton Systems, Inc. | High performance extended fiber optic hydrophone |
| US5668779A (en) * | 1996-03-29 | 1997-09-16 | The United States Of America As Represented By The Secretary Of The Navy | Hydrophone group design for shallow towed applications |
| CN1292238C (en) * | 2004-09-29 | 2006-12-27 | 上海交通大学 | Optical fiber vibrative sensor based on optical fiber raster |
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2007
- 2007-04-11 CN CN200710065324A patent/CN100587415C/en not_active Expired - Fee Related
Cited By (27)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101660939B (en) * | 2009-09-25 | 2012-06-06 | 暨南大学 | Optical fiber sound pressure sensor |
| CN102196349A (en) * | 2011-03-21 | 2011-09-21 | 中国科学院半导体研究所 | Fiber microphone with band-pass sound filter function |
| CN103492842A (en) * | 2011-04-14 | 2014-01-01 | 泰勒斯公司 | All-optical hydrophone that is not sensitive to temperature or static pressure |
| CN103492842B (en) * | 2011-04-14 | 2016-08-24 | 泰勒斯公司 | Full light hydrophone insensitive for temperature or static pressure |
| CN105940286A (en) * | 2013-08-16 | 2016-09-14 | 辉固技术有限公司 | Sensor for detecting pressure waves in liquid |
| CN105940286B (en) * | 2013-08-16 | 2019-08-09 | 辉固技术有限公司 | For detecting the sensor of the pressure wave in liquid |
| CN104932019A (en) * | 2014-01-31 | 2015-09-23 | Pgs地球物理公司 | Hydrophone |
| CN104932019B (en) * | 2014-01-31 | 2019-06-21 | Pgs 地球物理公司 | Hydrophone |
| CN105115586B (en) * | 2015-05-28 | 2018-05-22 | 北京航天控制仪器研究所 | A kind of anti-static pressure gas back of the body mandrel type interference optical fiber hydrophone probe of self-balancing |
| CN105115586A (en) * | 2015-05-28 | 2015-12-02 | 北京航天控制仪器研究所 | Self-balancing static-pressure resistant air-back mandrel-type interference fiber hydrophone probe |
| CN106595509A (en) * | 2016-12-27 | 2017-04-26 | 中国神华能源股份有限公司 | Fiber grating type sensor |
| CN109839514A (en) * | 2019-03-19 | 2019-06-04 | 合肥工业大学 | A kind of high-precision optical accelerometer with from zeroing function |
| CN109839514B (en) * | 2019-03-19 | 2021-01-15 | 合肥工业大学 | High-precision optical accelerometer with self-zero-adjusting function |
| CN111337117A (en) * | 2020-04-14 | 2020-06-26 | 青岛海洋科学与技术国家实验室发展中心 | Optical fiber laser hydrophone |
| CN111337117B (en) * | 2020-04-14 | 2022-07-05 | 青岛海洋科学与技术国家实验室发展中心 | Optical fiber laser hydrophone |
| CN112629641A (en) * | 2020-11-30 | 2021-04-09 | 中山市精量光电子科技有限公司 | Flywheel-shaped diaphragm type high-sensitivity standard hydrophone and method |
| CN112629641B (en) * | 2020-11-30 | 2023-03-28 | 中山市精量光电子科技有限公司 | Flywheel-shaped diaphragm type high-sensitivity standard hydrophone and method |
| CN112924013A (en) * | 2021-01-28 | 2021-06-08 | 哈尔滨工程大学 | Acceleration-resistant optical fiber hydrophone probe device |
| CN113405645A (en) * | 2021-06-08 | 2021-09-17 | 哈尔滨工程大学 | Hydrostatic pressure resistant optical fiber hydrophone based on piston |
| CN113405645B (en) * | 2021-06-08 | 2022-09-27 | 哈尔滨工程大学 | Hydrostatic pressure resistant optical fiber hydrophone based on piston |
| CN114623914A (en) * | 2022-02-28 | 2022-06-14 | 浙江大学 | Fiber grating hydrophone adopting frustum diaphragm and tensile coating |
| CN114623916A (en) * | 2022-02-28 | 2022-06-14 | 浙江大学 | Fiber grating hydrophone adopting double-cone-frustum-shaped diaphragm |
| CN114623913A (en) * | 2022-02-28 | 2022-06-14 | 浙江大学 | Fiber grating hydrophone adopting cymbal-shaped diaphragm and tensile coating |
| CN114623915A (en) * | 2022-02-28 | 2022-06-14 | 浙江大学 | Double-diaphragm fiber grating hydrophone adopting tensile coating for sensitization |
| CN114674411A (en) * | 2022-03-02 | 2022-06-28 | 浙江大学 | Fiber grating hydrophone adopting double cymbals-shaped diaphragms |
| CN115638908A (en) * | 2022-09-30 | 2023-01-24 | 海纳云物联科技有限公司 | Stress monitoring equipment based on fiber grating sensor |
| CN115638908B (en) * | 2022-09-30 | 2024-10-29 | 海纳云物联科技有限公司 | Stress monitoring equipment based on fiber bragg grating sensor |
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