CN112923886A - Modular real-time measuring device for deep displacement of soil body - Google Patents
Modular real-time measuring device for deep displacement of soil body Download PDFInfo
- Publication number
- CN112923886A CN112923886A CN202110227139.XA CN202110227139A CN112923886A CN 112923886 A CN112923886 A CN 112923886A CN 202110227139 A CN202110227139 A CN 202110227139A CN 112923886 A CN112923886 A CN 112923886A
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- steel
- inclination
- inclinometer
- segments
- sensor
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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
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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
Abstract
The invention discloses a modularized real-time measuring device for deep displacement of a soil body, which consists of a ground traction fixing device, a plurality of inclination measuring sections and a sensor string. The ground traction fixing device bears the gravity of the inclination measuring section and fixes the inclination measuring section on the ground surface. The inclinometry section is formed by connecting a plurality of steel sections. The steel segment takes a stainless steel plate as a substrate and is bent into a U-shaped component, and an inclination sensor and a connecting cable are arranged in the U-shaped groove. The two ends of the segment base plate are fixed with steel bars, the steel bars are connected with steel universal joints, and the segments are connected through the universal joints. The steel bar of the section at the uppermost end is connected with the ground traction fixing device through a bolt. The inclination measuring section is provided with a spring guide wheel and a steel cover plate for fixing and protecting the guide wheel. The segments are sequentially connected and then placed in the inclinometer pipe, and the guide wheel is placed in a guide groove of the inclinometer pipe so as to fix the orientation of the segments. When the segment is pushed by the horizontal displacement of the soil body to generate inclination, the inclination angle is measured by the inclination angle sensor, and the horizontal displacement generated by the current segment is obtained by multiplying the length of the segment by the inclination angle. The horizontal displacements of the segments are accumulated, and the horizontal displacement of the soil body at each depth can be obtained.
Description
Technical Field
The invention relates to the technical field of structural deformation monitoring, in particular to a device for indirectly measuring the displacement change of the deep part of a soil body based on a plurality of inclination angle sensors which are sequentially arranged at different depths of the soil body. Belongs to the technical field of structural deformation monitoring.
Background
The horizontal displacement monitoring of the deep soil body can accurately know the displacement change conditions and the change trend of soil bodies at different depths so as to judge whether the surrounding environment is safe or not. The existing monitoring method and equipment mainly comprise: 1. manual measurement based on a mobile inclinometer; 2. an automatic measurement method based on a plurality of mobile inclinometers; 3. an automatic measurement method based on a fixed inclinometer.
Manual measurement based on a mobile inclinometer: and placing a movable inclinometer in the inclinometer, sequentially measuring the inclination angle of the inclinometer according to certain interval depth from top to bottom and recording depth and angle data. And after the bottom is measured, the mobile inclinometer is put forward and rotated by 90 degrees, and then the inclinometer is put into the inclinometer tube again to repeatedly measure data once. And calculating the data to obtain displacement values of the soil body at all depths. This method usually requires two workers to operate simultaneously, is slow and inefficient, and cannot acquire displacement data in real time.
An automatic measurement method based on a plurality of mobile inclinometers comprises the following steps: and sequentially installing a movable inclinometer at each depth of the inclinometer to measure inclination angle data. The method has the advantages that: data is automatically collected at a high frequency without human intervention. The disadvantages are that: 1. a plurality of mobile inclinometers are needed, and the cost of the instrument is extremely high; 2. every inclinometer all needs a waterproof cable, and the aperture of inclinometer pipe is less, will hold inclinometer and more waterproof cable simultaneously, and the wiring is very inconvenient. The aperture of the inclinometer tube limits the use number of the inclinometers, so the inclinometer can be used only in a shallow soil body.
An automatic measurement method based on a fixed inclinometer; a plurality of mobile inclinometers are integrated, the inclination angle sensors of the inclinometers are connected into a whole by a 485 bus, and only one outgoing line is arranged. This method overcomes the disadvantage of using a large number of cables with multiple mobile inclinometers. The sensor cable has the disadvantages of high price, fixed connection between the sensor cable and the structural member, and difficult transportation, installation and disassembly.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a modular real-time measuring device for the deep displacement of a soil body. Has the characteristics of low cost, convenient transportation and installation, and the like.
The device consists of a ground traction fixing device, a plurality of inclination measuring sections and a sensor string. The ground traction fixing device fixes the inclination measuring section on the ground surface. The two ends of the segments are connected with steel universal joints through steel bars, and the segments are connected through the universal joints. The steel bar of the uppermost segment is connected with the ground traction fixing device through a bolt, see the attached figure 1. The inclinometer section is provided with a spring guide wheel and a steel cover plate for fixing and protecting the guide wheel, which is shown in figure 2. The segments are connected in sequence and then placed in the inclinometer, and the guide wheels are placed in the guide grooves of the inclinometer to fix the orientation of the segments, as shown in figure 3. When the segment is pushed by the horizontal displacement of the soil body to generate inclination, the inclination angle is measured by the inclination angle sensor, and the horizontal displacement generated by the current segment is obtained by multiplying the length of the segment by the inclination angle. The horizontal displacements of the segments are accumulated, and the horizontal displacement of the soil body at each depth can be obtained.
In order to achieve the purpose, the invention adopts the technical scheme that: the ground traction fixing device consists of a steel disc with a central opening and a handle. The outer diameter of the disc is greater than the outer diameter of the inclinometer tube used for installing the device, so that the device is prevented from falling into the inclinometer hole. The handle is used for lifting the device so as to facilitate the overhaul and the disassembly.
Suspended below the ground traction fixtures are a plurality of inclinometer sections. A fixed inclination angle sensor is mounted on each inclinometer section.
The inclination measuring section is made of common stainless steel plates and is bent into a U-shaped metal groove. On this metal tank are mounted various accessories and sensors, see fig. 4.
The inclination angle sensor and the inclination measuring section are designed in a separated mode, and are connected and fixed through screws and wire arranging clamps, see attached figure 5.
A stainless steel plate is bent and then welded to the back of the U-shaped steel groove to fix and protect the guide wheel and the accessory.
The segments are connected by common standard universal joints and are fixed by screws, so that the segments can be simply disassembled.
The separate sensor string consists of an inclination angle sensor circuit board, a shell and a connecting cable, see figure 6.
The inclination angle sensors are connected in a mode that 4-core 485 buses are connected in parallel, and the whole system is sequentially connected with the inclination angle sensors of all the sections through 4-core waterproof electric wires.
The inclination angle sensor is waterproof packaged in a glue pouring mode.
The circuit adopts the reason fastener of plastic to fix on the base plate, leans on the elasticity clamp of reason fastener to fix the 485 cables on the base plate, can be convenient dismantle the cable from the base plate get off.
The universal joint is connected with the steel plate through a round steel bar. The steel bar is processed into a certain size and a positioning hole according to requirements so as to ensure that the U-shaped steel groove and the universal joint are connected according to a specific relative position. Through the locating hole on the rod iron, cooperate guide wheel structure again to guarantee that the sensor is located the central point of whole section all the time.
The invention has the beneficial effects that: the detachable design of the modular structure design facilitates transportation, installation and detachment. The system comprises structure and inclination angle sensor two parts, and adopts the screw connection who easily dismantles between sensor and the structure to realize the simple and easy separation of sensor circuit part and mechanical structure part, be convenient for retrieve cyclic utilization. The detachable universal joint is adopted for connection between the structural members, and the universal joint has the advantages of simple structure, low cost and convenience in transportation, installation and use. The use requirement of the structural deformation monitoring project can be better adapted.
The inclination angle sensor and the inclination measuring section structural member are connected and fixed through screws and wire arranging clamps, so that the cable is easy to install and disassemble, and the cable is convenient to use for multiple times after being disassembled, and the cost is reduced.
The structural member is designed by adopting a thin stainless steel plate to be bent and formed at one time. The design of bending into the U-shaped groove has the following advantages: 1. the rigidity of the structure is increased, compared with a rod piece design mode of the same kind of products, the processing difficulty is reduced, the material consumption is reduced, the weight is reduced, and the cost is reduced; 2. the inner space of the U-shaped groove provides protection for the sensor, and the probability of falling and damage of the sensor is reduced; 3. the inner space of the U-shaped groove provides protection for the sensor cable, and the cable is prevented from being wound and worn.
Adopt the advantage that the back that welds to U type groove after the corrosion resistant plate is buckled is as the guide pulley protection shield: 1. the system rigidity is improved; 2. protecting the guide wheel and accessories; 3. a whole thin steel plate is bent and welded, the structure is simple, the production is easy, and the guide wheel structure inside can be better protected.
The segments are connected by common standard universal joints, and the connection is screw fixation and convenient to detach. Advantages of using a gimbal arrangement: 1. the universal joint product of the industrial standard is used, the cost is low, the quality is good, and the system cost is reduced; 2. providing a wide range of rotation angles; 3. facilitating linking between segments.
Advantages of the split sensor string: 1. the modular design separated from the segments is easy to install and transport, and the transportation damage of the integrated design is avoided; 2. the glue-pouring type sealing is low in cost, waterproof is achieved 3, the maintenance is convenient, if a damaged module is damaged, the module is cut off, and glue is poured after the module is replaced.
The connecting piece cooperation guide pulley structural design of round rod iron can guarantee the middle part of the whole deviational survey pipe of sensor base plate displacement, makes the data of inclination sensor more accurate.
Good waterproof performance: because the monitoring device needs to be buried underground for a long time, the monitoring device is probably completely soaked in water, and the structural part made of stainless steel has waterproofness naturally. The inclination angle sensor is packaged in a glue pouring mode, and water immersion can be prevented.
The reliability is high: the inclination angle sensor is completely embedded in the inclinometer, and because the segments are fixed and connected with each other, even if the inclinometer is damaged after the soil body is deformed, the inclination angle sensor can still normally work in the soil body.
Easy wiring: data lines among the plurality of inclination angle sensors are connected in series in a 485 interface mode, only one data line is used, and wiring is simple and convenient.
Scope of protection and system description of the invention: 1. for convenience of description and understanding, the description will be made with an easily understandable "segment" as a special term for a stainless steel plate bent into a U-shaped groove on which a guide wheel is mounted. The structural design of the U-shaped groove is adopted to increase the rigidity of the segment, reduce the weight and provide the installation protection effect for the sensor and the cable, and the structural design of the U-shaped groove is not limited by the material and the processing mode; 2. the design of fixing and protecting the guide wheel and the auxiliary structure by using the fixed bending plate on the U-shaped groove member belongs to the protection scope of the invention no matter what material and connection mode are adopted. 3. The invention uses the MEMS glue pouring inclination angle sensor, and can simultaneously measure the inclination angles of the three shafts. As to what type and accuracy of sensor is used, depending on the needs of the user, the protection of the invention is not affected. 4. The user can adjust mounting means, material according to actual conditions. The modification can be performed in other ways. However, these improvements are all of perfect nature and do not affect the scope of the invention.
In the research and development process, the system and the method are used and tested on a plurality of structural deformation monitoring projects, and the system is improved and perfected according to the test result, so that the use effect is good. In order to make the user fully understand the technical principle and the using method of the present invention, a more general installation embodiment is further described herein: 1. drilling a hole on the ground of a measuring point needing to monitor the deep horizontal displacement of the soil body; 2, installing an inclinometer pipe in the hole; 3. the method comprises the following steps of (1) swinging an inclination measuring section and an inclination angle sensor string along a straight line on the ground near a measuring point; 3. interconnecting the ground fixture attachment cap and the first inclinometer section using screws, as shown; 4. connecting the bodies of the plurality of inclinometer sections using screws and gimbals, as shown; 5. fixing the sensor on the inclinometer main body by using screws, and clamping the cable into the cable management card as shown in the figure; 5. putting the inclination measuring sections with the inclination angle sensors fixed into an inclination measuring pipe one by one at a proper angle; 6. reading initial data after stabilizing soil mass on the periphery of the inclined tube to be detected; 7. and calculating the horizontal displacement of the current segment according to the inclination angle of each inclination measuring sensor and the length of the installation segment. And after the displacement values of the segments are accumulated, the displacement value of each depth of the soil body can be obtained.
The foregoing description of specific embodiments of the present invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes or modifications of the application scenarios within the scope of the claims may be made by those skilled in the art without affecting the spirit of the present invention. In the case of conflict, the embodiments and features in the embodiments of the present application may be arbitrarily combined.
The present invention has various embodiments, and the above description is only an example of the present invention, and does not limit the scope of the present invention. All technical solutions formed by using equivalent detection modes and measurement modes in the content of the specification and the attached drawings of the invention, or directly or indirectly applied to other related technical fields, are within the scope of the invention as claimed.
Drawings
FIG. 1: ground traction attachment and connection between segments
FIG. 2 is a drawing: universal joint, guide wheel and steel cover plate structure diagram for protecting guide wheel
FIG. 3: installation diagram in a deviational survey tube
FIG. 4 is a drawing: single segment schematic
FIG. 5: installation schematic diagram of sensor in segment
FIG. 6: sensor string connection diagram.
Claims (9)
1. The invention relates to a modular real-time measuring device for deep displacement of a soil body, which consists of a ground traction fixing device, a plurality of inclination measuring sections and a sensor string.
2. A ground traction attachment as claimed in claim 1, comprising a centrally apertured steel disc of greater outer diameter than the outer diameter of the inclinometer tube used to mount the attachment, to prevent the attachment from falling into the inclinometer hole, and a handle for lifting the attachment for easy access and removal.
3. The plurality of inclinometer sections of claim 1, connected by a plurality of single sections through universal joints.
4. The sensor string according to claim 1, which is formed by connecting a plurality of sensors in sequence by cables; an MEMS tilt angle sensor is employed and encapsulated in a housing with a waterproof resin.
5. A single inclinometer section as claimed in claim 3, bent in the shape of a U-section from stainless steel plate.
6. The single inclinometer section of claim 5, the inclination angle sensor of claim 4 being screwed into a U-shaped groove; an elastic bayonet type cable clamp is fixed in the U-shaped groove by screws and used for restraining and fixing cables of the sensor string in claim 1.
7. A guide wheel protective cover is made of a steel plate and is welded to the back surface of the U-shaped groove of the single inclination measuring section according to claim 5 for fixing and protecting the guide wheel and accessories thereof, and a steel rod with drilled holes is fixed at two ends of the single inclination measuring section according to claim 5.
8. The steel bar of claim 8 inserted into a steel gimbal and screwed to connect adjacent segments, the segments being connected by a plurality of gimbals and the steel bar.
9. The diameter of the opening at the center of the steel disc is matched with the diameter of the steel rod in claim 8, so that the steel rod can pass through the steel disc and then be pinned by a screw.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110227139.XA CN112923886A (en) | 2021-03-02 | 2021-03-02 | Modular real-time measuring device for deep displacement of soil body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110227139.XA CN112923886A (en) | 2021-03-02 | 2021-03-02 | Modular real-time measuring device for deep displacement of soil body |
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| CN112923886A true CN112923886A (en) | 2021-06-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110227139.XA Pending CN112923886A (en) | 2021-03-02 | 2021-03-02 | Modular real-time measuring device for deep displacement of soil body |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102878893A (en) * | 2012-09-05 | 2013-01-16 | 三峡大学 | System and method for monitoring displacement of deep part of landslide |
| CN207335694U (en) * | 2017-09-22 | 2018-05-08 | 上海宝冶工程技术有限公司 | Automate detachable soil body inclination monitoring device |
| CN207688853U (en) * | 2017-11-07 | 2018-08-03 | 深圳市北斗云信息技术有限公司 | A kind of full-automatic deep displacement inclinometer of more piece independent assortment |
| CN109115145A (en) * | 2018-05-25 | 2019-01-01 | 中国地质大学（武汉） | A kind of embedded landslide depth large deformation monitoring device and method |
| CN208780164U (en) * | 2018-08-20 | 2019-04-23 | 深圳市北斗云信息技术有限公司 | Full depth array inclinometer |
-
2021
- 2021-03-02 CN CN202110227139.XA patent/CN112923886A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102878893A (en) * | 2012-09-05 | 2013-01-16 | 三峡大学 | System and method for monitoring displacement of deep part of landslide |
| CN207335694U (en) * | 2017-09-22 | 2018-05-08 | 上海宝冶工程技术有限公司 | Automate detachable soil body inclination monitoring device |
| CN207688853U (en) * | 2017-11-07 | 2018-08-03 | 深圳市北斗云信息技术有限公司 | A kind of full-automatic deep displacement inclinometer of more piece independent assortment |
| CN109115145A (en) * | 2018-05-25 | 2019-01-01 | 中国地质大学（武汉） | A kind of embedded landslide depth large deformation monitoring device and method |
| CN208780164U (en) * | 2018-08-20 | 2019-04-23 | 深圳市北斗云信息技术有限公司 | Full depth array inclinometer |
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Application publication date: 20210608 |