CN113090882A - Tunnel model warp measurement and uses miniature displacement sensor fixing device - Google Patents
Tunnel model warp measurement and uses miniature displacement sensor fixing device Download PDFInfo
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- CN113090882A CN113090882A CN202110337060.2A CN202110337060A CN113090882A CN 113090882 A CN113090882 A CN 113090882A CN 202110337060 A CN202110337060 A CN 202110337060A CN 113090882 A CN113090882 A CN 113090882A
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- 238000006073 displacement reaction Methods 0.000 title claims abstract description 71
- 238000005259 measurement Methods 0.000 title description 6
- 239000003822 epoxy resin Substances 0.000 claims description 9
- 229920000647 polyepoxide Polymers 0.000 claims description 9
- 238000012360 testing method Methods 0.000 abstract description 19
- 238000000034 method Methods 0.000 description 14
- 238000002474 experimental method Methods 0.000 description 6
- 238000012544 monitoring process Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 5
- 230000008859 change Effects 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 239000003292 glue Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000009412 basement excavation Methods 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000009933 burial Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16M—FRAMES, CASINGS OR BEDS OF ENGINES, MACHINES OR APPARATUS, NOT SPECIFIC TO ENGINES, MACHINES OR APPARATUS PROVIDED FOR ELSEWHERE; STANDS; SUPPORTS
- F16M11/00—Stands or trestles as supports for apparatus or articles placed thereon ; Stands for scientific apparatus such as gravitational force meters
- F16M11/02—Heads
- F16M11/04—Means for attachment of apparatus; Means allowing adjustment of the apparatus relatively to the stand
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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
- G01B21/02—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 length, width, or thickness
-
- 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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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Aerodynamic Tests, Hydrodynamic Tests, Wind Tunnels, And Water Tanks (AREA)
Abstract
The invention relates to a miniature displacement sensor fixing device for measuring deformation of a tunnel model. Comprises a fixed bracket, a sensor and a sensor fixed chassis; wherein the fixed bracket is provided with a horizontal fixed rod and a vertical fixed rod, and the horizontal fixed rod is provided with a chute; the vertical fixed rod is fixedly connected with the model box; the sensor is fixed on a sensor fixing chassis, the sensor fixing chassis is provided with an opening, the opening is coaxially provided with an opening after being combined with the sliding rail and the horizontal supporting rod, the upper surface of the opening is provided with a buckle, the buckle and the sliding rail are correspondingly consistent, and the buckle can move on the sliding rail and can be fixed at a determined position; the stability of the sensor fixing chassis is guaranteed when the sensor fixing chassis slides to the inner section of a certain tunnel model. When a model test with a smaller size is carried out, the miniature displacement sensor is fixed in the tunnel model to collect the deformation displacement data of the tunnel model, so that the deformation data of different sections of the tunnel model can be collected.
Description
Technical Field
The invention relates to a fixing device for a miniature displacement sensor, which can solve the problem that the miniature displacement sensor is difficult to fix in a narrow and long space, and particularly provides a fixing device for the miniature displacement sensor for measuring the deformation of a tunnel model. The method is better applied to acquisition of deformation data in a narrow model space.
Background
At present, in underground engineering construction, safety problems of adjacent pipelines often exist, and therefore displacement monitoring of peripheral pipelines is particularly important, but in actual engineering, monitoring difficulty is higher due to various problems such as pipeline burial depth and the like, pipelines capable of being migrated are migrated as much as possible, migration possibility does not exist for existing operated subway tunnels, monitoring protection is strengthened, and for problems which exist and are difficult to operate, displacement conditions of the underground engineering can be reflected to a certain extent through a model test. Thereby playing a certain guiding role in the construction process.
The model experiment refers to an entity experiment, and related data are acquired and design defects are checked through corresponding experiments on a scale-down or equal-ratio model. The method is characterized in that a test structure (or a component) which is made of similar materials in proper proportion and is similar to a prototype is loaded in proportion, so that the model can reproduce the structural test of the actual work of the prototype structure after being stressed. The test object is a test representative which is copied according to a certain scale by imitating a prototype (actual structure) and has all or part of the characteristics of the actual structure. The model size is generally smaller than the prototype structure. The indoor simulation experiment can effectively reduce the experiment floor area, the material preparation is comparatively simple and convenient, the expense is less and the cycle of carrying out the experiment is shorter, and although there is its unique advantage, there is certain degree of difficulty in the in-process of actual measurement yet. In the actual construction process, most of monitoring data are vertical displacement and horizontal displacement of a designed section of the tunnel, so that data required to be acquired in a model test also correspond to displacement values of the tunnel model.
The method is characterized in that the method is limited by engineering scale, different scales are often selected to be reduced according to different engineering and actual equipment in the process of model test, the influence of foundation pit excavation on an adjacent tunnel needs to be researched, the displacement of the tunnel model is measured in the mode adopted in the test operation, the displacement mainly comprises horizontal displacement and vertical displacement, the large scale is adopted in the model test to reduce the operation, and therefore after the shield tunnel is scaled down, the displacement condition of the tunnel model is measured due to undersize.
Based on the actual problem of data measurement under the small model size, the measuring instrument that can take at present is miniature displacement sensor, but miniature displacement sensor need keep fixed position in experimental, because the experimental space is narrow and small, consequently need solve the problem of arranging a plurality of miniature displacement sensors simultaneously in narrow and small space. This device can carry out data acquisition after miniature displacement sensor fixes in narrow and small space, and in the actual work progress, there are a plurality of cross sections to the monitoring in tunnel, and it is more to consider monitoring section quantity in the model test process, and this device has still promoted when satisfying narrow and small space miniature sensor's fixed demand, thereby utilizes mutual slip between buckle and the spout to make it fix at different cross sections and carry out the collection of data.
Disclosure of Invention
The data that can reflect tunnel safety problem most in actual engineering are the horizontal displacement and the settlement problem in tunnel, consequently also need gather the same data in tunnel model, and miniature displacement sensor need place and carry out data acquisition in tunnel model's inside, thereby this device can be fixed tunnel inner space with miniature displacement sensor and carry out tunnel model displacement data acquisition smoothly.
The technical scheme of the invention is as follows:
a micro displacement sensor fixing device for measuring deformation of a tunnel model; comprises a fixed bracket, a sensor and a sensor fixed chassis; wherein the fixed bracket is provided with a horizontal fixed rod and a vertical fixed rod, and the horizontal fixed rod is provided with a chute; the vertical fixed rod is fixedly connected with the model box; the sensor is fixed on a sensor fixing chassis, the sensor fixing chassis is provided with an opening, the opening is coaxially provided with an opening after being combined with the sliding rail and the horizontal supporting rod, the upper surface of the opening is provided with a buckle, the buckle and the sliding rail are correspondingly consistent, and the buckle can move on the sliding rail and can be fixed at a determined position; the stability of the sensor fixing chassis is guaranteed when the sensor fixing chassis slides to the inner section of a certain tunnel model.
The opening of the device fixing chassis is rectangular, preferably square.
The device buckle is V-shaped, two circular bulges are arranged on the upper portion of the V-shaped buckle, and the circular bulges of the buckle are tangent to the sawteeth of the sliding groove.
The device sliding groove and the horizontal fixing rod are bonded by epoxy resin.
The micro displacement sensor and the surface of the sensor fixing chassis are bonded by epoxy resin.
The device buckle and the sensor fixing chassis are bonded by epoxy resin.
The cross section of the device in use state is shown in fig. 2, the device main body is fixed on the model box through a vertical fixing rod, and a fixing chassis and a displacement sensor are fixed inside the tunnel model through a horizontal fixing rod and a sliding rail.
The fixed chassis of displacement sensor provides the fixed plane for the sensor, thereby can adjust the number of displacement sensor according to required data type.
The displacement data acquisition of different sections can be carried out through nesting between the square opening of the sensor fixing chassis and the horizontal fixing rod and the sliding rail and through the tangential relation between the buckles at the square opening and the sliding rail.
The device is mainly assembled according to the figure 3 and is provided with a fixing support and a sensor fixing chassis, wherein the fixing support is provided with a horizontal fixing rod and a vertical fixing rod, a sliding groove is formed in the horizontal fixing rod, so that the sensor fixing chassis can slide in the horizontal direction, the horizontal fixing rod can integrally fix the device on the outer surface of a model box, and the horizontal fixing rod can place a displacement sensor fixing chassis and a displacement sensor in a tunnel model for data acquisition; the miniature displacement sensor is fixed on the sensor fixing chassis, the sensor fixing chassis is provided with a square opening concentric with the circle center of the sensor fixing chassis, a buckle is arranged on the upper surface of the square opening and is V-shaped, two circular bulges are arranged on the upper portion of the V-shaped buckle, and the tangent relation between the circular bulges of the buckle and the sawteeth of the sliding groove can ensure that the stability of the sensor fixing chassis is kept when the sensor fixing chassis slides to the inner section of a certain tunnel model. And all parts of the device cooperate to complete the acquisition of the deformation data of the tunnel model.
The concrete description is as follows:
this device can be fixed on model case 1 through vertical dead lever 4 and two screws, connects through the screw between vertical dead lever 4 bottom and the 6 edges of horizontal fixation pole, and wherein the length of horizontal fixation pole 6 should be unanimous with the width of model case to make vertical dead lever 4 can hug closely further keep device's stability in the surface of model case, the horizontal fixation pole can place displacement sensor fixed chassis and displacement sensor in tunnel model inside simultaneously and carry out data acquisition.
The main part of the device is assembled according to the figure 3, wherein the sliding groove 5 and the horizontal fixing rod 6 are bonded by epoxy resin AB glue according to the position relation shown in the figure 5, the micro displacement sensor 3 is bonded to the surface of the sensor fixing chassis 7 by the epoxy resin AB glue, the buckle 8 and the sensor fixing chassis 7 are bonded by the epoxy resin AB glue, the position relation is shown in the figure 9, and the tail part of the buckle 8 is bonded with the upper surface of the sensor fixing chassis hole 9. Wherein the mutual sliding between the sensor fixing chassis 7 and the horizontal support bar 6 is performed by the tangential relation between the buckle 8 and the sliding chute 5.
The fixed chassis hole 9 is square, the center of the square hole and the circle center of the fixed chassis are in a concentric relation, the size of the hole is the same as the cross sectional area of the combined sliding groove 5 and the horizontal supporting and fixing rod 6, the hole can be ensured to smoothly penetrate into the hole and also ensure the stable relation between the fixed chassis and the horizontal fixing rod after combination, the sliding groove 5 and the horizontal supporting and fixing rod 6 are horizontally penetrated into the hole 9 after the buckle 8 and the sensor fixing chassis 7 are well bonded as shown in fig. 9 after combination according to the structure shown in fig. 5, the buckle slides between the sliding grooves to adjust the position of the sensor fixing chassis as shown in fig. 8 after combination of the two parts shown in fig. 5 and 9, and therefore the function of acquiring displacement information data of different sections is achieved.
The combined sliding of the buckle 8, the sliding groove 5 and the horizontal fixing rod 6 in the device is shown in fig. 7, the tangential relation between the buckle 8 and the sliding groove 5 is shown in fig. 10, wherein two circular convex areas at the front part of the buckle are respectively inscribed with triangular areas between sawteeth at two sides of the sliding groove.
In the device, the vertical fixing rods keep the vertical direction from displacement change, and the horizontal fixing rods keep the device stable in the horizontal direction. Meanwhile, data acquisition of different cross sections of the tunnel model is carried out through the horizontal sliding relation between the buckle and the sliding groove, the front part of the buckle and the sliding groove are tangent, and stability can be kept while sliding.
The material used by the device is a sensor fixing chassis, a miniature displacement sensor, a buckle, a chute, a horizontal fixing rod and a vertical fixing rod.
The device needs to be fixed outside the model box, and the vertical fixing rod and the model box are fixed through the turnbuckles, so that the support frame is prevented from displacing in the horizontal direction and the vertical direction to influence the measurement precision and the measurement result.
This device can be when carrying out the less model test of size, fixes miniature displacement sensor inside the tunnel model, can carry out the collection of tunnel model deformation displacement data, utilizes mutually supporting between this device buckle and the slide rail simultaneously, can make the sensor fix and carry out the slip of horizontal direction after fixed chassis and fix to can carry out the collection of deformation data to the different cross-sections of tunnel model.
Drawings
The patent is further described below with reference to the accompanying drawings and examples.
FIG. 1 is a schematic overall view of the apparatus in use;
FIG. 2 is a cross-sectional view of the device in use;
FIG. 3 is an assembled view of the present apparatus;
FIG. 4 is a combination view of the fixing rod and the sliding groove;
FIG. 5 is a combination view of a horizontal fixing rod and a chute;
FIG. 6 is a view of the displacement sensor and the stationary base plate and the snap assembly;
FIG. 7 is a schematic view of the sliding of the combination of the buckle and the sliding groove and the horizontal fixing rod;
FIG. 8 is a schematic view of a horizontal support portion of the apparatus;
FIG. 9 is a view of the sensor mounting base plate and the snap fastener combination
FIG. 10 is a schematic view of the tangential relationship between the slide slot and the buckle
In the figure:
the model box 1, the tunnel model 2 and the miniature displacement sensor 3; the sensor fixing device comprises a vertical fixing rod 4, a sliding chute 5, a horizontal fixing rod 6, a sensor fixing chassis 7 and a buckle 8; the chassis holes 9 are fixed.
Detailed Description
The invention is described in further detail below with reference to the following figures and detailed description: the whole use effect of device is as shown in figure 1, and two vertical fixed poles can pass through the screw fixation at the mold box surface, thereby pass through screwed connection holding device's stability between vertical fixed pole and the horizontal fixation pole, miniature displacement sensor pastes the collection that carries out displacement data on fixed chassis, and the tangent relation between buckle and the spout can make fixed chassis slide in the horizontal direction to can fix in a certain position, thereby satisfy the demand that different cross-section displacement data gathered. The device comprises a fixed bracket, a sensor and a sensor fixed chassis; wherein the fixed bracket is provided with a horizontal fixed rod and a vertical fixed rod, and the horizontal fixed rod is provided with a chute; the vertical fixed rod is fixedly connected with the model box; the sensor is fixed on a sensor fixing chassis, the sensor fixing chassis is provided with an opening, the opening is coaxially provided with an opening after being combined with the sliding rail and the horizontal supporting rod, the upper surface of the opening is provided with a buckle, the buckle and the sliding rail are correspondingly consistent, and the buckle can move on the sliding rail and can be fixed at a determined position; the stability of the sensor fixing chassis is guaranteed when the sensor fixing chassis slides to the inner section of a certain tunnel model. A
The assembly drawing is shown in fig. 3, wherein the vertical fixing rod is rectangular, the horizontal fixing rod and the slide rail are combined to form a square section, and the sectional area of the square section is the same as the size of a square opening at the center of the sensor fixing chassis. The upper surface of the square opening of the sensor fixing chassis is provided with a buckle, the buckle is V-shaped, the upper part of the V-shaped buckle is provided with two circular bulges, and the tangential relation between the circular bulges of the buckle and the sawteeth of the sliding groove can ensure that the stability of the sensor fixing chassis is kept when the sensor fixing chassis slides to the inner section of a certain tunnel model. And all parts of the device cooperate to complete the acquisition of the deformation data of the tunnel model.
This device can also change displacement sensor quantity, when required data is vertical displacement and horizontal displacement, required miniature displacement sensor's quantity be 4 quadrature arrange as shown in fig. 6 can, can only arrange two horizontal direction's displacement sensor when the displacement that only needs the horizontal direction, only need vertical direction's displacement when with the above-mentioned same reason, further if need measure except vertical and horizontal direction's displacement, can come to carry out the installation of different angles to miniature displacement sensor according to required displacement condition, thereby satisfy the different difference of required data difference in the different experiments, make this device obtain better application and extension.
In an actual model test, the diameter of a tunnel model is calculated to be 60mm according to an adopted scale and a formula, the diameter of a sensor fixing chassis is 50mm, the miniature displacement sensor adopts an Abek FCXA10 series high-temperature and high-pressure resistant small LVDT displacement sensor, the size of the device is 24mm, the side length of a square opening at the center of the sensor fixing chassis is 10mm, all parts of the device are assembled as shown in figure 3 and then fixed on the outer surface of a model box as shown in figure 2, the DH3816N static stress strain test analysis system of the Jiangsu Donghua test technology GmbH for data acquisition and processing is matched with the device in a model test, in the test process, the miniature displacement sensor is connected with a data acquisition end in a wired transmission mode for ensuring stability, the wiring mode between the miniature displacement sensor and the DH3816N panel is in half-bridge connection, and the input mode is DIF-DC. After the device is connected with a data acquisition system, test operation and data acquisition can be carried out.
This device application in model test not only can use when tunnel model diameter is 60mm, when tunnel model diameter carries out relevant change according to the scale, can adjust displacement sensor's model and fixed chassis and vertical and horizontal fixed rod's size to satisfy the demand of measuring the variety.
The device solves the problem of fixing the miniature displacement sensor in a narrow space, and simultaneously, because the tunnel model has more measuring sections in actual operation, the device is required to be designed to meet the requirements of displacement data acquisition of different tunnel model sections while the sensor is fixed. The device has good feasibility. The problem of fixing the displacement sensor during the acquisition of displacement data of different tunnel model sections is solved, and the requirements for measuring different angular displacements can be met.
While the methods and techniques of the present invention have been described in terms of preferred embodiments, it will be apparent to those of ordinary skill in the art that variations and/or modifications of the methods and techniques described herein may be made without departing from the spirit and scope of the invention. It is expressly intended that all such similar substitutes and modifications apparent to those skilled in the art are deemed to be within the spirit, scope and content of the invention.
Claims (6)
1. A micro displacement sensor fixing device for measuring deformation of a tunnel model; the device is characterized by comprising a fixed support, a sensor and a sensor fixing chassis; wherein the fixed bracket is provided with a horizontal fixed rod and a vertical fixed rod, and the horizontal fixed rod is provided with a chute; the vertical fixed rod is fixedly connected with the model box; the sensor is fixed on a sensor fixing chassis, the sensor fixing chassis is provided with an opening, the opening is coaxially provided with an opening after being combined with the sliding rail and the horizontal supporting rod, the upper surface of the opening is provided with a buckle, the buckle and the sliding rail are correspondingly consistent, and the buckle can move on the sliding rail and can be fixed at a determined position; the stability of the sensor fixing chassis is guaranteed when the sensor fixing chassis slides to the inner section of a certain tunnel model.
2. The apparatus of claim 1; the fixing base plate is characterized in that an opening of the fixing base plate is rectangular, preferably square.
3. The apparatus of claim 1; the novel sliding groove is characterized in that the buckle is V-shaped, two circular bulges are arranged on the upper portion of the V-shaped buckle, and the circular bulges of the buckle are tangent to the sawteeth of the sliding groove.
4. The apparatus of claim 1; the novel horizontal fixing rod is characterized in that the sliding groove and the horizontal fixing rod are bonded by epoxy resin.
5. The apparatus of claim 1; the miniature displacement sensor is characterized in that the surfaces of the miniature displacement sensor and the sensor fixing chassis are bonded by epoxy resin.
6. The apparatus of claim 1; the sensor fixing base plate is characterized in that the buckle and the sensor fixing base plate are bonded by epoxy resin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110337060.2A CN113090882A (en) | 2021-03-29 | 2021-03-29 | Tunnel model warp measurement and uses miniature displacement sensor fixing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110337060.2A CN113090882A (en) | 2021-03-29 | 2021-03-29 | Tunnel model warp measurement and uses miniature displacement sensor fixing device |
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| CN113090882A true CN113090882A (en) | 2021-07-09 |
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| CN202110337060.2A Pending CN113090882A (en) | 2021-03-29 | 2021-03-29 | Tunnel model warp measurement and uses miniature displacement sensor fixing device |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20070000032A (en) * | 2005-06-24 | 2007-01-02 | (주)지티씨코퍼레이션 | Instrument for measuring two dimensional deformation in tunnels |
| CN103063821A (en) * | 2013-01-10 | 2013-04-24 | 南宁轨道交通有限责任公司 | Model box, sensor fixing device and test method |
| CN209605794U (en) * | 2019-03-29 | 2019-11-08 | 上海歌尔泰克机器人有限公司 | A kind of blade measuring device |
| CN210917501U (en) * | 2019-10-11 | 2020-07-03 | 郑州大学建设工程质量研究检测有限公司 | Displacement sensor fixing device |
| CN111396695A (en) * | 2020-02-21 | 2020-07-10 | 珠海格力电器股份有限公司 | Base assembly structure and human body sensor |
| CN211651624U (en) * | 2020-04-11 | 2020-10-09 | 潘文忠 | Control point device for controlling and measuring underground plane of subway tunnel |
-
2021
- 2021-03-29 CN CN202110337060.2A patent/CN113090882A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20070000032A (en) * | 2005-06-24 | 2007-01-02 | (주)지티씨코퍼레이션 | Instrument for measuring two dimensional deformation in tunnels |
| CN103063821A (en) * | 2013-01-10 | 2013-04-24 | 南宁轨道交通有限责任公司 | Model box, sensor fixing device and test method |
| CN209605794U (en) * | 2019-03-29 | 2019-11-08 | 上海歌尔泰克机器人有限公司 | A kind of blade measuring device |
| CN210917501U (en) * | 2019-10-11 | 2020-07-03 | 郑州大学建设工程质量研究检测有限公司 | Displacement sensor fixing device |
| CN111396695A (en) * | 2020-02-21 | 2020-07-10 | 珠海格力电器股份有限公司 | Base assembly structure and human body sensor |
| CN211651624U (en) * | 2020-04-11 | 2020-10-09 | 潘文忠 | Control point device for controlling and measuring underground plane of subway tunnel |
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Effective date of registration: 20220130 Address after: 300072 Tianjin City, Nankai District Wei Jin Road No. 92 Applicant after: Tianjin University Applicant after: CHINA TIESIJU CIVIL ENGINEERING GROUP Co.,Ltd. Address before: 300350 Haijing garden, Haihe Education Park, Jinnan, Tianjin, 135, Tianjin University. Applicant before: Tianjin University |
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Application publication date: 20210709 |