CN113916184B - Improved connection method of multipoint displacement meter sensor connection device - Google Patents
Improved connection method of multipoint displacement meter sensor connection device Download PDFInfo
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- CN113916184B CN113916184B CN202111241109.0A CN202111241109A CN113916184B CN 113916184 B CN113916184 B CN 113916184B CN 202111241109 A CN202111241109 A CN 202111241109A CN 113916184 B CN113916184 B CN 113916184B
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- displacement
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- displacement sensor
- protective cover
- connecting plate
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- 238000006073 displacement reaction Methods 0.000 title claims abstract description 196
- 238000000034 method Methods 0.000 title claims abstract description 18
- 230000001681 protective effect Effects 0.000 claims abstract description 60
- 230000005540 biological transmission Effects 0.000 claims abstract description 39
- 238000012546 transfer Methods 0.000 claims abstract description 21
- 239000011435 rock Substances 0.000 claims description 16
- 230000000694 effects Effects 0.000 abstract description 5
- 238000004064 recycling Methods 0.000 abstract description 5
- 238000012544 monitoring process Methods 0.000 description 17
- 238000005259 measurement Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/32—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring the deformation in a solid
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Abstract
The invention discloses a connection method of an improved multipoint displacement meter sensor connection device, which comprises a transmission rod, a protective cover, a displacement sensing device and a connection plate, wherein the transmission rod is connected with the protective cover; the connecting plate and the displacement sensing device are both arranged in the protective cover, and the connecting plate is connected with the inner side of the protective cover through the displacement sensing device; the displacement sensing device comprises a sleeve and a displacement sensor, one end of the displacement sensor is connected with the connecting plate, the other end of the displacement sensor is connected with the sleeve in a sliding manner, the sleeve is connected with the inner side of the protective cover, and the displacement sensor is pulled out of the sleeve; the top of the transfer rod movably penetrates into the protective cover to be connected with the connecting plate, and the transfer rod and the displacement sensing device are positioned in the same side direction of the connecting plate and are parallel to each other. By adopting the scheme, the mode that the displacement sensor slides out of the sleeve to measure in the conventional mode can be changed, so that the displacement sensor slides into the sleeve to measure, and the displacement sensor can be always positioned in the protective cover, thereby achieving the effect of recycling.
Description
Technical Field
The invention relates to the technical field of safety monitoring, in particular to a connection method of an improved multipoint displacement meter sensor connection device.
Background
The multipoint displacement meter is one kind of instrument for rock deformation monitoring, and the instrument consists of mainly transmission rod, displacement sensor, sleeve, protecting hood, signal transmission cable, etc. and is installed via drilling inside rock.
The displacement sensor A and the transmission rod B of the existing scheme are directly connected through the bolt C, the displacement sensor A is completely located in the sleeve D, the sleeve D and the protection cover E are fixed through the bolt C, and the outer portion of the protection cover E is fixed with the wall of the rock hole. The initial state is shown in fig. 1. When the orifice rock mass is displaced, the protective cover E and the sleeve D are driven to displace together, until the measuring range of the displacement sensor A is used up, the displacement sensor A slides out of the sleeve D completely, and the displacement monitoring is finished. For structural reasons, the displacement sensor a is difficult to replace and cannot be reused. The end-of-range state of the displacement sensor A is shown in figure 2.
In view of the foregoing, there is a need for a device that can reuse the displacement sensor after the displacement sensor has been exhausted.
Disclosure of Invention
The invention aims to provide an improved connecting method of a multipoint displacement meter sensor connecting device, which solves the problems that the measuring range of a displacement sensor is difficult to replace and cannot be reused when the measuring range of the displacement sensor is used up due to structural reasons, and is particularly suitable for a scene of large deformation of a rock mass.
The invention is realized by the following technical scheme:
an improved multipoint displacement meter sensor connecting device comprises a transmission rod, a protective cover, a displacement sensing device and a connecting plate;
the connecting plate and the displacement sensing device are both arranged in the protective cover, and the connecting plate is connected with the inner side of the protective cover through the displacement sensing device; the displacement sensing device comprises a sleeve and a displacement sensor, one end of the displacement sensor is connected with the connecting plate, the other end of the displacement sensor is connected with the sleeve in a sliding manner, the sleeve is connected with the inner side of the protective cover, and the displacement sensor is pulled out of the sleeve;
The top of the transfer rod movably penetrates into the protective cover to be connected with the connecting plate, and the transfer rod and the displacement sensing device are positioned in the same side direction of the connecting plate and are parallel to each other.
Compared with the prior art, when the measuring range of the displacement sensor is used up, the displacement sensor is difficult to replace and cannot be reused due to structural reasons, and the scheme provides the improved multipoint displacement meter sensor connecting device which can change the measuring mode that the displacement sensor slides out of the sleeve to measure in the conventional mode, so that the displacement sensor slides into the sleeve to measure, and can be always positioned in the protective cover, and after the measuring range of the displacement sensor is used up, the displacement sensor is pulled out to achieve the effect of recycling; the device comprises a transmission rod, a protective cover and a displacement sensing device, and further comprises a connecting plate, wherein the connecting plate is preferably a cross arm piece and has certain connecting strength, the connecting plate is arranged in the protective cover, the top of the transmission rod can penetrate into the protective cover and is connected with the connecting plate, the transmission rod is movably connected with the protective cover, and the protective cover can move along the length direction of the transmission rod; the displacement sensor comprises a displacement sensor and a sleeve, wherein the two ends of the displacement sensor are respectively provided with a connecting plate and the sleeve, and the sleeve is fixed on the inner side of the protective cover, wherein the displacement sensor is pulled out of the sleeve, so that the measuring range of the displacement sensor is positioned outside the sleeve, and the measurement is convenient when the displacement sensor is contracted; because the transmission rod and the displacement sensing device are positioned in the same side direction of the connecting plate and are parallel to each other, when the orifice rock mass is displaced, the protective cover and the sleeve can be driven to displace together, at the moment, the displacement sensor gradually slides into the sleeve, and when the sensor completely slides into the sleeve, the displacement monitoring is completed at the moment; the displacement sensor is always positioned in the protective cover, after displacement monitoring is finished, the displacement sensor can be reset directly from the protective cover, namely the connecting plate is detached, the displacement sensor in the sleeve is pulled out again, and then the connecting plate is arranged, so that the displacement monitoring can be carried out again, and the reutilization of the displacement sensor is realized; wherein the connecting plate is preferably arranged at a position close to the top of the protective cover, so that the connecting plate is convenient to assemble and disassemble.
Further preferably, the top of the transmission rod and the displacement sensor are both connected with the connecting plate through bolts; the quick dismounting device is used for quickly dismounting the connecting plate.
Further optimized, the sleeve is connected with the inner side of the protective cover through a connecting rod; for bringing the connection plate close to the top of the protective cover.
Further optimizing, the sleeve is connected with the protective cover through bolts; the sleeve is used for facilitating the assembly and disassembly of the sleeve.
Further optimizing, wherein the displacement sensor is placed upside down; for facilitating displacement monitoring.
Further optimizing, wherein the measuring range of the displacement sensor is completely pulled out of the sleeve; for maximizing the monitoring amount of the displacement sensor.
Further preferably, the bottom of the transmission rod and the protection cover are fixed through grouting and rock hole walls.
Further optimizing, a connecting method of the improved multipoint displacement meter sensor connecting device comprises the following steps:
Step one: when the orifice rock mass displaces, the protective cover is driven to displace synchronously until the measuring range of the displacement sensor is completely used up, and the displacement sensor slides into the sleeve;
Step two: after the displacement sensors are all slid into the sleeve, the connecting plate is detached, the displacement sensors are pulled out of the sleeve, and then the long transmission rod is connected to the top of the transmission rod in a continuous mode;
step three: after the extension transfer rod is connected, the extension transfer rod and the displacement sensor are reconnected to the connecting plate.
Further preferably, the length of the continuous extension transmission rod is equal to the measuring range of the displacement sensor pulled out of the sleeve.
Further preferably, when the displacement sensor is pulled out of the sleeve, the measuring range of the displacement sensor is completely pulled out of the sleeve.
The specific working steps of the scheme are as follows: in the initial state, the displacement sensor is pulled out completely in the sleeve, namely the measuring range of the displacement sensor is positioned outside the sleeve, and when the orifice rock mass is displaced, the protective cover and the sleeve are driven to synchronously move, so that the displacement sensor gradually slides into the sleeve, the displacement sensor can transmit the displacement in real time, and when the displacement sensor completely slides into the sleeve, the measuring range of the displacement sensor is used up, namely the displacement monitoring is finished; at this moment, the displacement sensor and the transfer rod need to be detached from the connecting sheet in the protective cover, after being detached, the displacement sensor is reset, namely, the displacement sensor is pulled out from the sleeve completely, at this moment, the top of the transfer rod is shorter than the displacement sensing device, a new extension transfer rod needs to be connected to the top of the transfer 1, the length of the extension transfer rod is preferably kept consistent with the measurement range of the displacement sensor, the two ends are positioned at the same position, the two ends are conveniently connected with the connecting plate again, and the effect of recycling the displacement sensor is achieved.
Compared with the prior art, the invention has the following advantages and beneficial effects:
in the technical scheme, the device for connecting the displacement sensor and the transmission rod by adopting the connecting plate solves the problem that the range of the displacement sensor is difficult to recycle after being used up in the prior structure, thereby saving the cost and being particularly suitable for the scene of large deformation of the rock mass.
Drawings
In order to more clearly illustrate the technical solutions of the exemplary embodiments of the present invention, the drawings that are needed in the examples will be briefly described below, it being understood that the following drawings only illustrate some examples of the present invention and therefore should not be considered as limiting the scope, and that other related drawings may be obtained from these drawings without inventive effort for a person skilled in the art. In the drawings:
FIG. 1 is an initial state diagram of a prior art displacement sensor connection device;
FIG. 2 is a state diagram of the prior art when the range of the displacement sensor is over;
FIG. 3 is an initial state diagram of the connection device of the displacement sensor according to the present embodiment;
FIG. 4 is a state diagram of the displacement sensor provided by the scheme when the measuring range is over;
fig. 5 is a state diagram of the continuous extension transfer rod according to the present embodiment.
In the drawings, the reference numerals and corresponding part names:
The device comprises a 1-transmission rod, a 2-protection cover, a 3-connection plate, a 4-sleeve, a 5-displacement sensor and a 6-extension transmission rod.
Detailed Description
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. However, it will be apparent to one of ordinary skill in the art that: no such specific details are necessary to practice the invention. In other instances, well-known structures, circuits, materials, or methods have not been described in detail in order not to obscure the invention.
Throughout the specification, references to "one embodiment," "an embodiment," "one example," or "an example" mean: a particular feature, structure, or characteristic described in connection with the embodiment or example is included within at least one embodiment of the invention. Thus, the appearances of the phrases "in one embodiment," "in an example," or "in an example" in various places throughout this specification are not necessarily all referring to the same embodiment or example. Furthermore, the particular features, structures, or characteristics may be combined in any suitable combination and/or sub-combination in one or more embodiments or examples. Moreover, those of ordinary skill in the art will appreciate that the illustrations provided herein are for illustrative purposes and that the illustrations are not necessarily drawn to scale. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
In the description of the present invention, the terms "front", "rear", "left", "right", "upper", "lower", "vertical", "horizontal", "high", "low", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, merely to facilitate description of the present invention and simplify description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the scope of the present invention.
Example 1
The embodiment 1 provides an improved multipoint displacement meter sensor connecting device, which comprises a transmission rod 1, a protective cover 2, a displacement sensing device and a connecting plate 3, as shown in fig. 3 to 5;
The connecting plate 3 and the displacement sensing device are both arranged in the protective cover 2, and the connecting plate 3 is connected with the inner side of the protective cover 2 through the displacement sensing device; the displacement sensing device comprises a sleeve 4 and a displacement sensor 5, wherein one end of the displacement sensor 5 is connected with the connecting plate 3, the other end of the displacement sensor is in sliding connection with the sleeve 4, the sleeve 4 is connected with the inner side of the protective cover 2, and the displacement sensor 5 is pulled out from the sleeve 4;
the top of the transmission rod 1 movably penetrates into the protective cover 2 to be connected with the connecting plate 3, and the transmission rod 1 and the displacement sensing device are positioned in the same side direction of the connecting plate 3 and are parallel to each other.
Compared with the prior art, when the measuring range of the displacement sensor 5 is used up, due to structural reasons, the displacement sensor 5 is difficult to replace and cannot be reused, the scheme provides an improved multipoint displacement meter sensor connecting device, and by adopting the scheme, the mode that the displacement sensor 5 slides out of the sleeve 4 to carry out measurement in a conventional mode can be changed, the displacement sensor 5 slides into the sleeve 4 to carry out measurement, the displacement sensor 5 can be always positioned in the protective cover 2, and after the measuring range of the displacement sensor 5 is used up, the displacement sensor 5 is pulled out again to achieve the effect of recycling; the device comprises a transmission rod 1, a protective cover 2 and a displacement sensing device, and further comprises a connecting plate 3, wherein the connecting plate 3 is preferably a cross arm piece and has certain connecting strength, the connecting plate 3 is arranged in the protective cover 2, the top of the transmission rod 1 can penetrate into the protective cover 2 to be connected with the connecting plate 3, the transmission rod 1 is movably connected with the protective cover 2 at the moment, and the protective cover 2 can move along the length direction of the transmission rod 1; the displacement sensing device comprises a displacement sensor 5 and a sleeve 4, wherein two ends of the displacement sensor 5 are respectively provided with a connecting plate 3 and the sleeve 4, the sleeve 4 is fixed on the inner side of the protective cover 2, the displacement sensor 5 is pulled out from the sleeve 4, so that the measuring range of the displacement sensor 5 is positioned outside the sleeve 4, and the measurement is convenient when the device is contracted; because the transmission rod 1 and the displacement sensing device are positioned in the same side direction of the connecting plate 3 and are parallel to each other, when the orifice rock mass is displaced, the protection cover 2 and the sleeve 4 can be driven to displace together, at the moment, the displacement sensor 5 gradually slides into the sleeve 4, and when the sensors all slide into the sleeve 4, the displacement monitoring is completed at the moment; the displacement sensor 5 is always positioned in the protective cover 2, so that after displacement monitoring is finished, the displacement sensor 5 can be reset directly from the protective cover 2, namely the connecting plate 3 is detached, the displacement sensor 5 in the sleeve 4 is pulled out again, and then the connecting plate 3 is assembled, so that the displacement monitoring can be performed again, and the reutilization of the displacement sensor 5 is realized; wherein the connecting plate 3 is preferably arranged at a position close to the top of the protective cover 2, so that the connecting plate 3 is convenient to assemble and disassemble.
In the embodiment, the top of the transmission rod 1 and the displacement sensor 5 are both connected with the connecting plate 3 through bolts; for achieving a quick detachment of the connection plate 3.
In the embodiment, the sleeve 4 is connected with the inner side of the protective cover 2 through a connecting rod; in order to enable the connecting plate 3 to be close to the top of the protective cover 2, in the scheme, the sleeve 4 can be connected with the inner side of the bottom of the protective cover 2 through the connecting rod, so that the whole displacement sensing device is lengthened, the transmission rod 1 can extend into the protective cover 2 more, and the displacement sensor 5 is convenient to reset after displacement monitoring is completed.
In this embodiment, the sleeve 4 is connected with the protection cover 2 through bolts; for facilitating the loading and unloading of the sleeve 4.
In this embodiment, the displacement sensor 5 is placed upside down; to facilitate displacement monitoring; in this scheme, because the displacement sensor 5 in the prior art slides out of the sleeve 4 for measurement, and the displacement sensor 5 in the document of the present application slides into the sleeve 4 for measurement, the displacement sensor 5 in this scheme needs to be placed upside down, so that displacement monitoring is facilitated.
In this embodiment, the measuring range of the displacement sensor 5 is pulled out of the sleeve 4; for maximizing the monitoring amount of the displacement sensor 5.
In this embodiment, the bottom of the transmission rod 1 and the protection cover 2 are both fixed by grouting and rock hole walls.
Example 2
Embodiment 2 is further optimized based on embodiment 1, and provides an improved connection method of the multipoint displacement meter sensor connection device, which comprises the following steps:
Step one: when the orifice rock mass is displaced, the protective cover 2 is driven to synchronously displace until the measuring range of the displacement sensor 5 is completely used up, and the displacement sensor 5 completely slides into the sleeve 4;
step two: after the displacement sensor 5 is completely slid into the sleeve 4, the connecting plate 3 is detached, the displacement sensor 5 is pulled out of the sleeve 4, and then the long transmission rod 6 is connected to the top of the transmission rod 1;
step three: after the extension transfer rod 6 is connected, the extension transfer rod 6 and the displacement sensor 5 are connected to the connecting plate 3 again.
In this embodiment, the length of the extension transmission rod 6 that is connected is equal to the range in which the displacement sensor 5 is pulled out of the sleeve 4.
In this embodiment, when the displacement sensor 5 is pulled out from the sleeve 4, the measuring range of the displacement sensor 5 is pulled out from the sleeve 4.
The specific working steps of the scheme are as follows: in the initial state, the displacement sensor 5 is pulled out from the sleeve 4, namely the measuring range of the displacement sensor 5 is positioned outside the sleeve 4, and when the orifice rock mass is displaced, the protective cover 2 and the sleeve 4 are driven to synchronously move, so that the displacement sensor 5 gradually slides into the sleeve 4, the displacement sensor 5 can transmit the displacement in real time, and when the displacement sensor 5 completely slides into the sleeve 4, the measuring range of the displacement sensor 5 is used up, namely the displacement monitoring is finished; at this time, the displacement sensor 5 and the transfer rod 1 need to be detached from the connecting sheet in the protective cover 2, after being detached, the displacement sensor 5 is reset, namely, the displacement sensor is pulled out from the sleeve 4 completely, at this time, the top of the transfer rod 1 is shorter than the displacement sensor device, a new extension transfer rod 6 needs to be connected to the top of the transfer rod 1, wherein the length of the extension transfer rod 6 is preferably kept consistent with the measuring range of the displacement sensor 5, the two ends are positioned at the same position, and the two ends are convenient to be connected with the connecting plate 3 again, so that the effect of recycling the displacement sensor 5 is achieved.
The foregoing description of the embodiments has been provided for the purpose of illustrating the general principles of the invention, and is not meant to limit the scope of the invention, but to limit the invention to the particular embodiments, and any modifications, equivalents, improvements, etc. that fall within the spirit and principles of the invention are intended to be included within the scope of the invention.
Claims (9)
1. An improved connecting method of a multipoint displacement meter sensor connecting device, wherein the improved multipoint displacement meter sensor connecting device comprises a transmission rod (1), a protective cover (2) and a displacement sensing device, and is characterized by further comprising a connecting plate (3);
The connecting plate (3) and the displacement sensing device are both arranged in the protective cover (2), and the connecting plate (3) is connected with the inner side of the protective cover (2) through the displacement sensing device; the displacement sensing device comprises a sleeve (4) and a displacement sensor (5), one end of the displacement sensor (5) is connected with the connecting plate (3), the other end of the displacement sensor is connected with the sleeve (4) in a sliding manner, the sleeve (4) is connected with the inner side of the protective cover (2), and the displacement sensor (5) is pulled out from the sleeve (4);
The top of the transmission rod (1) movably penetrates into the protective cover (2) and is connected with the connecting plate (3), and the transmission rod (1) and the displacement sensing device are positioned in the same side direction of the connecting plate (3) and are parallel to each other;
the connection method further comprises the following steps:
step one: when the orifice rock mass is displaced, the protective cover (2) is driven to synchronously displace until the measuring range of the displacement sensor (5) is completely used up, and the displacement sensor (5) is completely slid into the sleeve (4);
step two: after the displacement sensors (5) are all slid into the sleeve (4), the connecting plate (3) is detached, the displacement sensors (5) are pulled out of the sleeve (4), and then the long transmission rod (6) is connected to the top of the transmission rod (1);
Step three: after the extension transfer rod (6) is connected, the extension transfer rod (6) and the displacement sensor (5) are connected to the connecting plate (3) again.
2. The connection method of the improved multipoint displacement meter sensor connection device according to claim 1, wherein the top of the transmission rod (1) and the displacement sensor (5) are both connected with the connecting plate (3) through bolts.
3. An improved connection method of a multipoint displacement meter sensor connection device according to claim 1, wherein the sleeve (4) is connected to the inside of the protective cover (2) by a connecting rod.
4. An improved connection method of a multipoint displacement meter sensor according to claim 1, wherein the sleeve (4) is bolted to the protective cover (2).
5. An improved connection method for a multipoint displacement meter sensor according to claim 1, wherein the displacement sensor (5) is placed upside down.
6. An improved connection method for a multipoint displacement meter sensor according to claim 1, wherein the measuring range of the displacement sensor (5) is pulled out of the sleeve (4) entirely.
7. The connection method of the improved multipoint displacement meter sensor connection device according to claim 1, wherein the bottom of the transmission rod (1) and the protection cover (2) are fixed through grouting and rock hole walls.
8. An improved connection method of a multipoint displacement meter sensor according to claim 1, characterized in that the length of the extension transmission rod (6) connected is equal to the measuring range of the displacement sensor (5) pulled out of the sleeve (4).
9. An improved connection method of a multipoint displacement meter sensor according to claim 1, wherein the measuring range of the displacement sensor (5) is pulled out from the sleeve (4) when the displacement sensor (5) is pulled out from the sleeve (4).
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| CN202111241109.0A CN113916184B (en) | 2021-10-25 | 2021-10-25 | Improved connection method of multipoint displacement meter sensor connection device |
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| CN202111241109.0A CN113916184B (en) | 2021-10-25 | 2021-10-25 | Improved connection method of multipoint displacement meter sensor connection device |
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| CN201429415Y (en) * | 2009-07-07 | 2010-03-24 | 中国水利水电科学研究院 | Installation base for multi-point displacement meter sensor |
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| CN101526339B (en) * | 2009-04-22 | 2010-12-08 | 东南大学 | Temperature self-compensation fiber grating displacement sensor |
| US20100277748A1 (en) * | 2009-04-30 | 2010-11-04 | Sergey Potapenko | Method and System for Measuring Relative Positions Of A Specular Reflection Surface |
| CN202018264U (en) * | 2011-04-25 | 2011-10-26 | 卢波 | Bridge detection displacement pre-stressing device |
| CN103603381A (en) * | 2013-12-08 | 2014-02-26 | 中铁西北科学研究院有限公司 | Detection device and detection method for buttress single-pile vertical uplift static load test |
| CN204115696U (en) * | 2014-06-12 | 2015-01-21 | 沈阳飞机工业（集团）有限公司 | For the flexible connecting device of rod-pulling type linear movement pick-up calibration |
| CN104264998B (en) * | 2014-10-20 | 2016-04-13 | 沈阳建筑大学 | For the machine drawing of FRP fixing quantity self-anchoring type prestressing force |
| JP7076954B2 (en) * | 2017-06-13 | 2022-05-30 | 株式会社キーエンス | Confocal displacement meter |
| CN207963846U (en) * | 2018-04-11 | 2018-10-12 | 中国电建集团成都勘测设计研究院有限公司 | Periphery fissure deformation monitoring device |
| CN108362209B (en) * | 2018-04-25 | 2024-04-16 | 深圳市迈步机器人科技有限公司 | Displacement sensor and displacement detection method |
| CN108981612B (en) * | 2018-05-04 | 2019-09-24 | 华中科技大学 | A kind of lathe vertical axis rolling angle error measurement method based on bidifly optical interferometer |
| CN210036584U (en) * | 2019-05-30 | 2020-02-07 | 河南发恩德矿业有限公司 | Long-life dam body displacement detection device |
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| CN201429415Y (en) * | 2009-07-07 | 2010-03-24 | 中国水利水电科学研究院 | Installation base for multi-point displacement meter sensor |
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