CN211783322U - Device for increasing measuring range of FBG displacement sensor - Google Patents
Device for increasing measuring range of FBG displacement sensor Download PDFInfo
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- CN211783322U CN211783322U CN202020873887.6U CN202020873887U CN211783322U CN 211783322 U CN211783322 U CN 211783322U CN 202020873887 U CN202020873887 U CN 202020873887U CN 211783322 U CN211783322 U CN 211783322U
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Abstract
The utility model provides a device of increase FBG displacement sensor range, when the monitoring object removes, because holding screw I is fixed with telescopic link and movable muffjoint, consequently, movable sleeve can outwards stretch out, through the spring drive sensor sideslip, thereby the length of monitoring component, when movable sleeve is whole stretches out, loosen holding screw I, when the monitoring object removes, telescopic link relative activity sleeve outwards stretches out, stretch out length through telescopic link relative activity sleeve adds movable sleeve's stretch out length, thereby under the condition that does not change the only sensor measurement accuracy of FBG, the range of sensor has been increased effectively, make the application of sensor more extensive.
Description
Technical Field
The utility model relates to a sensor technical field, concretely relates to device of increase FBG displacement sensor range.
Background
With the continuous improvement of the infrastructure of China in recent years, large-scale projects such as bridges, dams, tunnels and the like are increased. Compared with the traditional sensor, the fiber bragg grating sensor has the advantages of being more sensitive, strong in anti-interference capability, good in corrosion resistance and the like, and therefore, the fiber bragg grating sensor is widely applied to various engineering construction projects. The FBG displacement sensor is mainly used for monitoring the displacement change of an engineering structure and a soil body. The FBG displacement sensors used in China at present have limited measuring ranges which are mostly below 100mm, and in the field construction process, the displacement of a monitored object sometimes exceeds 100mm under the influence of complex geological conditions, improper manual operation, large-scale construction machinery and the like, and even the sensors are damaged due to too large out-of-range in severe cases. Therefore, potential risks in the construction process are greatly increased, the monitoring effect is influenced, relevant personnel make wrong decisions, and further the engineering quality is reduced, and even production safety accidents are caused.
Disclosure of Invention
The utility model discloses an overcome not enough of above technique, provide a range that has effectively increased the only sensor of FBG, increased the range of application of FBG sensor, be applicable to the device of the increase FBG displacement sensor range that uses under the various complicated geological conditions.
The utility model overcomes the technical scheme that its technical problem adopted is:
the utility model provides a device of increase FBG displacement sensor range, includes sensor housing, and its inside sensor that is provided with along horizontal slip still includes:
the movable sleeve is of a tubular structure, a through hole I is formed in the front end of the sensor shell, and the movable sleeve is horizontally inserted into the through hole I in a sliding mode;
one end of the spring is connected to the tail end of the movable sleeve, and the other end of the spring is connected to the sensor;
the telescopic rod is inserted into the movable sleeve in a sliding mode along the horizontal direction, the front end of the telescopic rod is provided with external threads, a screw hole is formed in the end hanging piece, the end hanging piece is screwed on the external threads through the screw hole, and the end hanging piece is connected with an object to be monitored; and
the fastening screw I is screwed on the movable sleeve, a slot is formed in the telescopic rod, and the lower end of the fastening screw I is inserted into the slot.
In order to protect the movable sleeve, the sensor further comprises a protective sleeve which is fixed at the front end of the sensor shell, a through hole II is formed in the front end of the protective sleeve, and the movable sleeve is located in the protective sleeve and is inserted into the through hole II in a horizontally sliding mode.
In order to improve the smoothness of movement, the tail end of the telescopic rod is provided with a piston, and the outer wall of the piston is in sliding friction contact with the inner wall of the movable sleeve.
Furthermore, the rear end of the sensor shell is provided with a fiber outlet hole, and the cable penetrates through the fiber outlet hole and then is connected to the sensor.
Preferably, the cross-sectional area of the end suspension member is a regular hexagonal prism shape.
In order to improve fixed firmness, the fixing device further comprises a set screw II, the set screw II is screwed on the end hanging piece, and the lower end of the set screw II is in contact with the external thread.
The utility model has the advantages that: when the monitoring object removes, because holding screw I is fixed with telescopic link and movable muffjoint, consequently, movable sleeve can outwards stretch out, through the spring drive sensor sideslip, thereby the length of monitoring component, when movable sleeve is whole to stretch out, loosen holding screw I, when the monitoring object removes, telescopic link activity sleeve outwards stretches out relatively, through telescopic link activity sleeve's the length of stretching out relatively in addition movable sleeve's the length of stretching out, thereby under the condition that does not change the only sensor measurement accuracy of FBG, the range of sensor has been increased effectively, make the application of sensor more extensive.
Drawings
Fig. 1 is a schematic view of the structure of the present invention;
fig. 2 is a schematic structural view of the telescopic rod part of the present invention;
FIG. 3 is a schematic side view of the end hanger of the present invention;
in the figure, 1, a sensor shell 2, a sensor 3, a through hole I4, a protective sleeve 5, a movable sleeve 6, a spring 7, a fiber outlet hole 8, a through hole II 9, a telescopic rod 10, a piston 11, a set screw I12, an external thread 13, an end hanging piece 14, a screw hole 15 and a set screw II are arranged.
Detailed Description
The present invention will be further explained with reference to fig. 1, fig. 2 and fig. 3.
The utility model provides a device of increase FBG displacement sensor range, includes sensor housing 1, and its inside is provided with sensor 2 along horizontal slip, still includes: the movable sleeve 5 is of a tubular structure, a through hole I3 is formed in the front end of the sensor shell 1, and the movable sleeve 5 is horizontally inserted into the through hole I3 in a sliding mode; one end of the spring 6 is connected with the tail end of the movable sleeve 5, and the other end of the spring is connected with the sensor 2; the telescopic rod 9 is inserted into the movable sleeve 5 in a sliding mode along the horizontal direction, an external thread 12 is arranged at the front end of the telescopic rod 9, a screw hole 14 is formed in the end hanging piece 13, the end hanging piece 13 is screwed on the external thread 12 through the screw hole 14, and the end hanging piece 13 is connected with an object to be monitored; and a set screw I11 screwed on the movable sleeve 5, a slot is arranged on the telescopic rod 9, and the lower end of the set screw I11 is inserted in the slot. When the monitoring object removes, because holding screw I11 is connected telescopic link 9 and activity sleeve 5 fixedly, consequently, activity sleeve 5 can outwards stretch out, 2 sideslip through spring 6 drive sensor, thereby the length of monitoring component, when activity sleeve 5 is whole to be stretched out, loosen holding screw I11, when the monitoring object removes, telescopic link 9 is the activity sleeve 5 outwards stretched out relatively, stretch out length through telescopic link 9 is the activity sleeve 5 relatively in addition to the stretch out length of activity sleeve 5, thereby under the condition that does not change the only sensor measurement accuracy of FBG, the range of sensor has been increased effectively, make the application of sensor more extensive.
Preferably, the sensor further comprises a protective sleeve 4 fixed at the front end of the sensor housing 1, a through hole II 8 is formed at the front end of the protective sleeve 4, and the movable sleeve 5 is located in the protective sleeve 4 and is horizontally slidably inserted into the through hole II 8. The protective sleeve 4 is arranged on the periphery of the movable sleeve 5, so that the movable sleeve 5 can be effectively protected, and the service life is prolonged.
Preferably, the tail end of the telescopic rod 9 is provided with a piston 10, and the outer wall of the piston 10 is in sliding friction contact with the inner wall of the movable sleeve 5. By arranging the piston 10, the telescopic rod 9 can smoothly slide in the movable sleeve 5, and the motion guidance is improved.
Further, the rear end of sensor housing 1 is provided with out fine hole 7, and the cable passes and connects in sensor 2 behind the fine hole 7 of play, through setting up out fine hole 7, can make things convenient for the cable to wear out from sensor housing 1. Preferably, the cross-sectional area of the end hanger 13 is a regular hexagonal prism shape.
Furthermore, the fixing device further comprises a set screw II 15, the set screw II 15 is screwed on the end hanging piece 13, and the lower end of the set screw II 15 is in contact with the external thread 12. The firmness of connection between the end hanging piece 13 and the external thread 12 can be improved by screwing the set screw II 15, and the use reliability is improved.
Claims (6)
1. The utility model provides a device of increase FBG displacement sensor range, includes sensor housing (1), and its inside is provided with sensor (2) along horizontal slip, its characterized in that still includes:
the sensor comprises a sensor shell (1), a movable sleeve (5) which is of a tubular structure, wherein the front end of the sensor shell (1) is provided with a through hole I (3), and the movable sleeve (5) is horizontally inserted into the through hole I (3) in a sliding manner;
one end of the spring (6) is connected to the tail end of the movable sleeve (5), and the other end of the spring is connected to the sensor (2);
the telescopic rod (9) is inserted into the movable sleeve (5) in a sliding mode along the horizontal direction, an external thread (12) is arranged at the front end of the telescopic rod (9), a screw hole (14) is formed in the end hanging piece (13), the end hanging piece (13) is screwed on the external thread (12) through the screw hole (14), and the end hanging piece (13) is connected with a monitored object; and
set screw I (11) closes in the activity sleeve (5) soon on, be provided with the slot on telescopic link (9), the lower extreme cartridge of set screw I (11) is in the slot.
2. The apparatus for increasing the range of FBG displacement sensors as claimed in claim 1, wherein: still include protective sleeve (4), its front end that is fixed in sensor housing (1), the front end of protective sleeve (4) is provided with through-hole II (8), and activity sleeve (5) are located protective sleeve (4) and its horizontal slip cartridge is in through-hole II (8).
3. The apparatus for increasing the range of FBG displacement sensors as claimed in claim 1, wherein: the tail end of the telescopic rod (9) is provided with a piston (10), and the outer wall of the piston (10) is in sliding friction contact with the inner wall of the movable sleeve (5).
4. The apparatus for increasing the range of FBG displacement sensors as claimed in claim 1, wherein: the rear end of the sensor shell (1) is provided with a fiber outlet hole (7), and the cable penetrates through the fiber outlet hole (7) and then is connected to the sensor (2).
5. The apparatus for increasing the range of FBG displacement sensors as claimed in claim 1, wherein: the cross-sectional area of the end hanger (13) is in a regular hexagonal prism shape.
6. The apparatus for increasing the range of FBG displacement sensors as claimed in claim 1, wherein: the clamping device is characterized by further comprising a set screw II (15), the set screw II (15) is screwed on the end hanging piece (13), and the lower end of the set screw II (15) is in contact with the external thread (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020873887.6U CN211783322U (en) | 2020-05-22 | 2020-05-22 | Device for increasing measuring range of FBG displacement sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020873887.6U CN211783322U (en) | 2020-05-22 | 2020-05-22 | Device for increasing measuring range of FBG displacement sensor |
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| Publication Number | Publication Date |
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| CN211783322U true CN211783322U (en) | 2020-10-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202020873887.6U Active CN211783322U (en) | 2020-05-22 | 2020-05-22 | Device for increasing measuring range of FBG displacement sensor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113790960A (en) * | 2021-09-08 | 2021-12-14 | 大连理工大学 | Variable sensitivity fiber grating sensor for monitoring fracture failure process under static load effect and use method |
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2020
- 2020-05-22 CN CN202020873887.6U patent/CN211783322U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113790960A (en) * | 2021-09-08 | 2021-12-14 | 大连理工大学 | Variable sensitivity fiber grating sensor for monitoring fracture failure process under static load effect and use method |
| CN113790960B (en) * | 2021-09-08 | 2022-05-27 | 大连理工大学 | Variable sensitivity fiber grating sensor for monitoring fracture failure process under static load effect and use method |
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