CN204286372U - Be applicable to the fiber grating torque sensor structure of underwater environment - Google Patents
Be applicable to the fiber grating torque sensor structure of underwater environment Download PDFInfo
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- CN204286372U CN204286372U CN201420676226.9U CN201420676226U CN204286372U CN 204286372 U CN204286372 U CN 204286372U CN 201420676226 U CN201420676226 U CN 201420676226U CN 204286372 U CN204286372 U CN 204286372U
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Abstract
The utility model relates to a kind of fiber grating torque sensor structure being applicable to underwater environment, there is a torque measurement axle, a sealed cylindrical, described torque measurement axle is placed in sealed cylindrical, sealed cylindrical is stretched out at two ends, and be sealedly and fixedly connected by two pieces of circular metal plates and sealed cylindrical two ends, Symmetric Orthogonal distributing installation fiber grating moment of torsion strain transducer on torque measurement axle, responsive for improving measurement sensistivity and eliminating Temperature cross-over, sealed cylindrical is installed watertight type fiber-optical socket, optical signal transmission is carried out by watertight Optical fiber plug between fiber grating torque sensor and measuring equipment.The utility model structure is simple, easy for installation, electromagnetism interference, and measuring accuracy is high, and the life-span is long, efficiently solves the measurement of equipment torque parameter under the rotten rugged surroundings of high undersea hydrostatic pressures height.
Description
Technical field
The utility model relates to a kind of fiber grating torque sensor, especially a kind of fiber grating torque sensor structure being applicable to the measurement of the torque parameter of equipment under underwater environment and severe wet environment.
Background technology
Underwater research vehicle, underwater vehicle, marine drilling platform etc., the power shafting system of these equipment is usually operated under water in wet environment, and be subject to environmental corrosion, the real-time measurement carrying out moment of torsion to these equipment dynamic axle systems is the critical process that support equipment normally runs simultaneously.Traditional torque sensor adopts resistance strain gage as survey sensor, invades to duck in drink and carry out torque measurement after sealing.Under the long term of high hydraulic pressure, high salt and various corrosion, resistance strain gage is easily aging; And when measuring in deep water, longer stube cable also can affect measuring accuracy.
Fiber-optic grating sensor is a kind of novel fiber optic sensing device, has that volume is little, encapsulation is simple, electromagnetism interference, anticorrosive, long range propagation loss is little, strain sensitive, be easy to build the features such as distributed sensor.Torque sensor at present based on fiber grating design mostly is theoretical analysis, as have studied solid cylinder and hollow cylinder to the impact of Linear Tuning of Fiber Bragg Grating characteristic; Use high birefringence optical fiber grating and long period fiber grating to carry out torque measurement etc., these researchs are also in laboratory study, and under being applicable to the rugged surroundings such as under water, the fiber grating torque sensor of torque measurement rarely has report especially.
Summary of the invention
Under the medium moist rugged surroundings of water, Problems existing and active demand is used for traditional electrical class torque sensor, give full play to the advantage of fiber-optic grating sensor in stress measurement, the utility model provides a kind of fiber grating torque sensor structure being applicable to underwater environment, this sensor construction simple structure, measuring accuracy is high, the life-span is long, can be directly used in the rugged surroundings such as the high corrosion of high undersea hydrostatic pressures.
The technical scheme that the utility model solves the employing of its technical matters is: a kind of fiber grating torque sensor structure being applicable to underwater environment, there is a torque measurement axle, a sealed cylindrical, described torque measurement axle is placed in sealed cylindrical, sealed cylindrical is stretched out at two ends, and be sealedly and fixedly connected by two pieces of circular metal plates and sealed cylindrical two ends, Symmetric Orthogonal distributing installation fiber Bragg grating strain sensor on torque measurement axle, responsive for improving measurement sensistivity and eliminating Temperature cross-over, sealed cylindrical is installed watertight type fiber-optical socket, optical signal transmission is carried out by watertight Optical fiber plug between fiber grating torque sensor and measuring equipment.
Between described measurement axle and circular metal plate, " O " RunddichtringO is all housed between circular metal plate and sealed cylindrical.
Described circular metal plate by three threaded holes of its end face and the threaded hole of three on periphery respectively with sealed cylindrical with measure axle and be fixedly connected with.
Described sealed cylindrical is provided with a rectangular recess perforate of installing watertight type fiber-optical socket; between described watertight type fiber-optical socket inside and rectangular recess, " O " RunddichtringO is housed, watertight type fiber-optical socket and rectangular recess outside are coated with moisture protection glue.
Described torque measurement axle is carved with the stria of the Symmetric Orthogonal distribution of installing optical fibres grating strain transducer.
Described fiber Bragg grating strain sensor is metal coating fiber grating.Described fiber Bragg grating strain sensor is arranged to half-bridge or full-bridge mode on measurement axle.Described watertight Optical fiber plug fiber pigtail pours into sealing glue.
The beneficial effects of the utility model are: sensor construction of the present utility model is simple, easy for installation, and measuring accuracy is high, and the life-span is long, are applicable to the torque measurement of rugged surroundings under water, have good waterproof sealing performance.
Accompanying drawing explanation
Fig. 1 is the front view of sensor construction of the present utility model;
Fig. 2 is the structural representation of watertight Optical fiber plug;
Fig. 3 is the front view of torque measurement axle;
Fig. 4 is the structural representation of sheet metal;
Fig. 5 is the fiber-optical socket structure cut-open view along A-A in Fig. 1.
Embodiment
As shown in Figures 1 to 5, a kind of fiber grating torque sensor structure being applicable to underwater environment, comprises sealed cylindrical 1, torque measurement axle 3, circular metal plate 4, watertight Optical fiber plug 5 etc.
Torque measurement axle 3 is placed in sealed cylindrical 1, sealed cylindrical 1 is stretched out at two ends, and be sealedly and fixedly connected by two pieces of circular metal plates 4 and sealed cylindrical 1 two ends, Symmetric Orthogonal distributing installation fiber Bragg grating strain sensor on torque measurement axle 3, responsive for improving measurement sensistivity and eliminating Temperature cross-over, sealed cylindrical 1 is installed watertight type fiber-optical socket 202, between fiber Bragg grating strain sensor and measuring equipment, carry out optical signal transmission by watertight Optical fiber plug 5.Measure between axle 3 and circular metal plate 4, " O " RunddichtringO is all housed between circular metal plate 4 and sealed cylindrical 1.
As shown in Figure 4, circular metal plate 4 by three threaded holes 401 of its end face and the threaded hole of three on periphery 402 respectively with sealed cylindrical 1 with measure axle 3 and be fixedly connected with.
As shown in Figure 5, sealed cylindrical 1 is provided with the rectangular recess 2 also perforate 201 that is installed watertight type fiber-optical socket 202.Between watertight type fiber-optical socket 202 inside and rectangular recess 2, " O " RunddichtringO is housed, watertight type fiber-optical socket 202 is coated with moisture protection glue with rectangular recess 2 outside.
As shown in Figure 3, torque measurement axle 3 is carved with the stria 301 of the Symmetric Orthogonal distribution of installing optical fibres Grating torque sensor.Fiber Bragg grating strain sensor is metal coating fiber grating.Fiber Bragg grating strain sensor is arranged to half-bridge or full-bridge mode on measurement axle 3.
As shown in Figure 2, watertight Optical fiber plug 5 fiber pigtail 501 pours into sealing glue.
Be produced on by metal-coated membrane fiber grating on an optical fiber, one end of optical fiber is connected with water-stop type fiber-optical socket 202; Fiber grating is welded in good stria 301 at torque axis 3 quarter; Fiber-optical socket 202 adds " O " RunddichtringO close installation and coordinates with sealed cylindrical 1; Two pieces of circular metal plates 4 are connected torque measurement axle 3 and sealed cylindrical 1, realizes the installation of strain transducer; Connect watertight Optical fiber plug 5 and fiber-optical socket 202, realize strain transducer and extraneous Power supply and Signal transmissions.
The fiber grating of plating serial connection is welded in full-bridge (or half-bridge) mode in the stria that torque measurement axle has been carved, and be connected with fiber-optical socket, at intermediate ends facing cut one rectangular recess of sealed cylindrical, a through hole is opened in the middle of groove, be screwed with fiber-optical socket, add " O " RunddichtringO between the two, thering is provided luminous energy to supply utilizes watertight type Optical fiber plug to be connected with fiber-optical socket with the optical fiber of optical signal transmission, , wherein watertight type Optical fiber plug carries out water-proofing treatment at outlet fluid sealant, with two pieces of sheet metals, sealed cylindrical and torque measurement axle are fixed together, middle interpolation " O " RunddichtringO, finally smear anticorrosion waterproof sealing glue in all junctions, complete the water-tight protection of fiber Bragg grating strain sensor.
Claims (8)
1. one kind is applicable to the fiber grating torque sensor structure of underwater environment, there is a torque measurement axle (3), a sealed cylindrical (1), it is characterized in that: described torque measurement axle (3) is placed in sealed cylindrical (1), sealed cylindrical (1) is stretched out at two ends, and be sealedly and fixedly connected by two pieces of circular metal plates (4) and sealed cylindrical (1) two ends, the upper Symmetric Orthogonal distributing installation fiber Bragg grating strain sensor of torque measurement axle (3), responsive for improving measurement sensistivity and eliminating Temperature cross-over, sealed cylindrical (1) is upper installs watertight type fiber-optical socket (202), optical signal transmission is carried out by watertight Optical fiber plug (5) between fiber grating torque sensor and measuring equipment.
2. the fiber grating torque sensor structure being applicable to underwater environment according to claim 1, it is characterized in that: between described measurement axle (3) and circular metal plate (4), " O " RunddichtringO is all housed between circular metal plate (4) and sealed cylindrical (1).
3. the fiber grating torque sensor structure being applicable to underwater environment according to claim 1, is characterized in that: described circular metal plate (4) by three threaded holes (401) of its end face and the threaded hole of three on periphery (402) respectively with sealed cylindrical (1) with measure axle (3) and be fixedly connected with.
4. the fiber grating torque sensor structure being applicable to underwater environment according to claim 1; it is characterized in that: described sealed cylindrical (1) be provided with one install watertight type fiber-optical socket (202) rectangular recess (2) and perforate (201); between described watertight type fiber-optical socket (202) inside and rectangular recess (2), " O " RunddichtringO is housed, watertight type fiber-optical socket (202) is coated with moisture protection glue with rectangular recess (2) outside.
5. the fiber grating torque sensor structure being applicable to underwater environment according to claim 1, is characterized in that: the stria (301) described torque measurement axle (3) being carved with the Symmetric Orthogonal distribution of installing optical fibres grating strain transducer.
6. the fiber grating torque sensor structure being applicable to underwater environment according to claim 1, is characterized in that: described fiber Bragg grating strain sensor is metal coating fiber grating.
7. the fiber grating torque sensor structure being applicable to underwater environment according to claim 1, is characterized in that: described fiber Bragg grating strain sensor is arranged to half-bridge or full-bridge mode in measurement axle (3).
8. the fiber grating torque sensor structure being applicable to underwater environment according to claim 1, is characterized in that: described watertight Optical fiber plug (5) fiber pigtail (501) pours into sealing glue.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420676226.9U CN204286372U (en) | 2014-11-13 | 2014-11-13 | Be applicable to the fiber grating torque sensor structure of underwater environment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420676226.9U CN204286372U (en) | 2014-11-13 | 2014-11-13 | Be applicable to the fiber grating torque sensor structure of underwater environment |
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| CN204286372U true CN204286372U (en) | 2015-04-22 |
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| CN201420676226.9U Active CN204286372U (en) | 2014-11-13 | 2014-11-13 | Be applicable to the fiber grating torque sensor structure of underwater environment |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104330046A (en) * | 2014-11-13 | 2015-02-04 | 中国船舶重工集团公司第七0四研究所 | Fiber bragg grating torque sensor structure applicable to underwater environment |
| CN110631500A (en) * | 2019-09-12 | 2019-12-31 | 南京林业大学 | Online measurement method of birefringent optical fiber loop mirror strain sensor |
-
2014
- 2014-11-13 CN CN201420676226.9U patent/CN204286372U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104330046A (en) * | 2014-11-13 | 2015-02-04 | 中国船舶重工集团公司第七0四研究所 | Fiber bragg grating torque sensor structure applicable to underwater environment |
| CN110631500A (en) * | 2019-09-12 | 2019-12-31 | 南京林业大学 | Online measurement method of birefringent optical fiber loop mirror strain sensor |
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