CN110823175A - Displacement high-frequency observation device and method based on multi-point reverse recognition technology - Google Patents
Displacement high-frequency observation device and method based on multi-point reverse recognition technology Download PDFInfo
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- CN110823175A CN110823175A CN201911082395.3A CN201911082395A CN110823175A CN 110823175 A CN110823175 A CN 110823175A CN 201911082395 A CN201911082395 A CN 201911082395A CN 110823175 A CN110823175 A CN 110823175A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C5/00—Measuring height; Measuring distances transverse to line of sight; Levelling between separated points; Surveyors' levels
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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
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
- G01B11/022—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness by means of tv-camera scanning
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Abstract
The invention discloses a displacement high-frequency observation device and a method based on a multipoint reverse identification technology, wherein the displacement high-frequency observation device comprises a measuring device and a calibration plate; the measuring device comprises a base, a measuring box movably arranged on the base and a transparent protective cover arranged on the base, wherein the measuring box is arranged in the transparent protective cover; the inside of the measuring box is provided with a processing module, a power supply module connected with the processing module, a camera, a communication module and a storage module; a plurality of identification patterns with known sizes and distances are printed on the calibration board, and the identification patterns are positioned in the monitoring range of the camera; the invention shoots the images of a plurality of identification patterns on a calibration plate through a camera; the processing module calibrates the pixel distance according to the size and the actual distance of the identification pattern, and then calculates the sedimentation and the horizontal displacement of the base according to the pixel coordinate change of the identification pattern on different frame images; the device has the advantages of high measurement precision, simple structure, easy installation, good portability and good application prospect.
Description
Technical Field
The invention belongs to the technical field of geotechnical engineering monitoring, and particularly relates to a displacement high-frequency observation device and method based on a multipoint reverse recognition technology.
Background
With the continuous development of social economy, geotechnical engineering is continuously developing towards artistry, greenization and intellectualization, and functions are more diversified and comprehensive, so that higher requirements are provided for the safety of geotechnical engineering. Among them, monitoring of displacement at specific positions in engineering, such as surface subsidence and horizontal displacement, is an important monitoring project in geotechnical engineering, and the control requirements in actual engineering are increasingly strict. For example, in the areas such as the ground surface around the foundation pit, the slope top of the side slope and the like, if excessive settlement or horizontal displacement occurs, instability of the foundation pit or the side slope can be caused, and economic loss and even life safety are threatened. The displacement is mainly monitored manually in the traditional geotechnical engineering, and although the monitoring precision is higher, the displacement is seriously influenced by regions and weather conditions. Meanwhile, manual field monitoring cannot timely and effectively feed back the change of the displacement, and the monitoring frequency is very limited. How to enable the monitoring work not to be interfered by external conditions, and simultaneously, the high-frequency measurement can be carried out in real time, and early warning can be timely given out when necessary, which is a problem to be solved urgently. Therefore, the novel technology which has high measurement precision, high stability and continuous monitoring and can be automatically monitored is developed.
Chinese patent publication No. CN105043344B discloses a settlement distribution monitoring system and method based on continuous fiber composite profiles, wherein the detection system includes a sub-region measuring station, a settlement calculation module and a monitoring control center, the sub-region measuring station is composed of a longitudinal positioning rod and a horizontal sensing rod; the longitudinal positioning rod consists of an anchoring section embedded in the soil body, a joint part connected with the horizontal sensing rod outside the soil body and a soil surface anchoring sheet; two sides of the joint part are respectively connected with the horizontal sensing rods through hinging and fixedly connecting, and each horizontal sensing rod is implanted with a strain sensing unit along the axial direction; each sub-area measuring station is connected to the settlement computing module and the monitoring control center through data transmission lines. The invention has convenient construction and low cost, and can be widely applied to the fields of measuring and connecting and monitoring the vertical settlement displacement of large buildings and geotechnical engineering such as tunnels, inclined plane landslides, long-distance track foundations and the like.
Chinese patent with publication number CN110306608A discloses subway elevated section pile foundation settlement monitoring device and monitoring method, and relates to the technical field of pile foundation settlement monitoring, including base and embedded pile, the vertical shallow layer test bar that wears to be equipped with in the embedded pile, the vertical middle level test bar that wears to be equipped with in the shallow layer test bar and the bottom has set firmly shallow layer buried plate respectively, middle level buried plate and deep layer buried plate, the cover is equipped with three telescopic link on the base and respectively with shallow layer test bar, the top of middle level test bar and deep layer test bar is articulated to be connected, embedded three displacement meter that is equipped with of embedded pile. Subside the monitoring through shallow layer test bar, middle level test bar and deep test bar to the soil layer of the different degree of depth of pile foundation week side, the soil layer of which degree of depth position has appeared subsiding through the turned angle rapid judgement of telescopic link, and then takes precaution in advance in order to avoid the degree of depth to subside, and the displacement meter can assist and subside the monitoring. The soil layers on the periphery of the pile foundation are subjected to settlement monitoring in two different monitoring modes, so that errors are reduced, and the monitoring precision is improved.
Although the existing monitoring system also has an automatic monitoring function, most of the existing monitoring systems do not have the function of monitoring settlement and horizontal displacement data simultaneously, and the existing monitoring systems have the defects of more related sensing assemblies, complex structure, inconvenient installation and maintenance, higher cost and poorer transportability.
Disclosure of Invention
The invention aims to solve the problems in the prior art, and provides a displacement high-frequency observation device and method based on a multipoint reverse recognition technology, which are simple in structure, convenient to install and maintain and capable of monitoring vertical settlement and horizontal displacement data of a point to be measured simultaneously.
In order to achieve the purpose, the invention adopts the technical scheme that:
a displacement high-frequency observation method based on a multipoint reverse identification technology specifically comprises the following steps:
s1, mounting the calibration board at a position where displacement does not occur;
s2, mounting the base at a position where sedimentation and horizontal displacement easily occur;
s3, mounting the measuring box on the base, adjusting the pitching angle of the measuring box to enable the calibration plate to be positioned in the monitoring range of the camera, and fixing the angle of the measuring box;
s4, calibrating the pixel distance of the camera according to the sizes of the plurality of identification patterns on the calibration board and the actual distance, and establishing a pixel coordinate system of the image shot by the camera;
s5, installing a transparent protective cover on the base;
s6, periodically collecting image data of a plurality of identification patterns on the calibration plate through a camera, and calculating the settlement and horizontal displacement data of the base by using a processing module according to the coordinate change of the identification patterns on different frame images in a pixel coordinate system;
and S7, sending the image data obtained by monitoring and the calculated settlement and displacement data to a monitoring terminal through a communication module.
Specifically, a plurality of identification patterns on the calibration plate are not intersected with each other, and the operation amount of the single chip microcomputer can be reduced by arranging the non-intersected identification patterns.
Specifically, the bottom of the measuring box is provided with a threaded through hole, the base is provided with a mounting hole, and the measuring box is connected with the base through the threaded through hole, the mounting hole and a bolt; the pitching angle of the measuring box is adjusted and fixed through a bolt.
Optionally, the power module comprises a rechargeable battery, a solar panel and a charging module; the charging module is respectively connected with the solar panel and the rechargeable battery; the solar panel is used for converting solar energy into electric energy, and the charging module is used for charging the rechargeable battery after voltage regulation, rectification and filtering of the converted electric energy.
Optionally, the communication module is a wireless communication module, and specifically, an RS485 wireless communication module can be adopted, so that the wireless communication distance is long, and the communication effect is good.
Specifically, the processing module is a single chip microcomputer.
Optionally, the storage module is a hard disk or a USB memory.
Corresponding to the displacement high-frequency observation method based on the multipoint reverse identification technology, the invention also provides a displacement high-frequency observation device based on the multipoint reverse identification technology, which comprises a measuring device and a calibration plate; the measuring device comprises a base, a measuring box movably arranged on the base and a transparent protective cover arranged on the base, wherein the measuring box is arranged in the transparent protective cover; the inside of the measuring box is provided with a processing module, a power supply module connected with the processing module, a camera, a communication module and a storage module; a plurality of identification patterns with known sizes and distances are printed on the calibration board, and the identification patterns are positioned in the monitoring range of the camera; the calibration plate is arranged at a position where displacement does not occur, and the base is arranged at a position where sedimentation and horizontal displacement easily occur;
the camera is used for shooting images of a plurality of identification patterns on the calibration plate; the processing module is used for processing the shot images, calibrating the pixel distance according to the sizes and the actual distances of the plurality of identification patterns, and calculating the sedimentation and the horizontal displacement of the base according to the pixel coordinate change of the identification patterns on different frame images; the communication module is used for sending the shot images and the settlement and horizontal displacement data of the point locations to the monitoring terminal; the storage module is used for storing monitoring data; the power module is used for supplying power for the measuring box.
Specifically, a plurality of identification patterns on the calibration plate are not intersected with each other, and the operation amount of the single chip microcomputer can be reduced by arranging the non-intersected identification patterns.
Specifically, the bottom of the measuring box is provided with a threaded through hole, the base is provided with a mounting hole, and the measuring box is connected with the base through the threaded through hole, the mounting hole and a bolt; the pitching angle of the measuring box is adjusted and fixed through a bolt.
Optionally, the power module comprises a rechargeable battery, a solar panel and a charging module; the charging module is respectively connected with the solar panel and the rechargeable battery; the solar panel is used for converting solar energy into electric energy, and the charging module is used for charging the rechargeable battery after voltage regulation, rectification and filtering of the converted electric energy.
Optionally, the communication module is a wireless communication module, and specifically, an RS485 wireless communication module can be adopted, so that the wireless communication distance is long, and the communication effect is good.
Optionally, the storage module is a hard disk or a USB memory.
Specifically, the processing module is a single chip microcomputer.
Compared with the prior art, the invention has the beneficial effects that: (1) the device adopts the measuring box comprising the camera and the singlechip and the calibration plate printed with a plurality of specific identification patterns as the measuring device, and has the characteristics of simple equipment, good linearity and high automation degree compared with the traditional displacement measuring device; (2) according to the invention, the camera is used for image acquisition, and the pixels of the camera are higher, so that the precision of the measuring device is improved; (3) according to the method, a pixel coordinate system is established in an image shot by a camera, and vertical settlement and horizontal displacement data of a point to be measured are calculated according to pixel coordinate differences of identification patterns on different shot frame images; (4) the measuring box can be detached for turnover use after the monitoring task is completed, so that the monitoring cost is reduced, and the measuring box has good economic benefit and social benefit.
Drawings
FIG. 1 is a schematic view of an installation structure of a displacement high-frequency observation device based on a multi-point reverse recognition technology according to the present invention;
FIG. 2 is a schematic diagram of a process of calculating the sedimentation amount by the observation device according to the coordinate difference of different frame patterns;
FIG. 3 is a schematic block diagram of the connection structure of the internal electrical components of the high-frequency displacement observation device based on the multi-point reverse recognition technology;
in the figure: 1. a measuring device; 2. calibrating the plate; 3. a base; 4. a measurement box; 5. a protective cover; 6. a camera; 7. a logo pattern; 8. settling the reinforcing steel bars; 9. a threaded through bore.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1 to 3, the present embodiment provides a displacement high-frequency observation method based on a multipoint reverse identification technology, which specifically includes the following steps:
s1, mounting the calibration board 2 at a position where displacement does not occur;
s2, installing the base 3 at a position where sedimentation and horizontal displacement easily occur;
s3, mounting the measuring box 4 on the base 3, adjusting the pitching angle of the measuring box 4 to enable the calibration board 2 to be positioned in the monitoring range of the camera 6, and fixing the angle of the measuring box 4;
s4, calibrating the pixel distance of the camera 6 according to the sizes and the actual distances of the plurality of identification patterns 7 on the calibration board 2, and establishing a pixel coordinate system of the image shot by the camera 6;
s5, installing a transparent protective cover 5 on the base 3;
s6, periodically acquiring image data of a plurality of identification patterns 7 on the calibration plate 2 through the camera 6, and calculating the settlement and horizontal displacement data of the base 3 by using the processing module according to the coordinate change of the identification patterns 7 on different frame images in the pixel coordinate system; (in FIG. 2,. DELTA.S is the amount of vertical sinkage displacement)
And S7, sending the image data obtained by monitoring and the calculated settlement and displacement data to a monitoring terminal through a communication module.
The embodiment also provides a displacement high-frequency observation device based on the multipoint reverse identification technology, which comprises a measuring device 1 and a calibration plate 2; the measuring device 1 comprises a base 3, a measuring box 4 movably arranged on the base 3 and a transparent protective cover 5 arranged on the base 3, wherein the measuring box 4 is arranged in the transparent protective cover 5; a single chip microcomputer, a power supply module connected with the single chip microcomputer, a camera 6, a communication module and a storage module are arranged in the measuring box 4; a plurality of identification patterns 7 with known sizes and distances are printed on the calibration board 2, and the identification patterns 7 are positioned in the monitoring range of the camera 6; the calibration plate 2 is arranged at a position where displacement does not occur, and the base 3 is arranged at a position where sedimentation and horizontal displacement easily occur;
the camera 6 is used for shooting images of a plurality of identification patterns 7 on the calibration plate 2; the single chip microcomputer is used for processing the shot images, calibrating the pixel distance according to the sizes and the actual distances of the plurality of identification patterns 7, and calculating the sedimentation and the horizontal displacement of the base 3 according to the pixel coordinate change of the identification patterns 7 on different frame images; the communication module is used for sending the shot images and the settlement and horizontal displacement data of the point locations to the monitoring terminal; the storage module is used for storing monitoring data; the power module is used for supplying power to the measuring box 4.
Specifically, the plurality of identification patterns 7 on the calibration board 2 are not intersected with each other, and the calculation amount of the single chip microcomputer can be reduced by arranging the identification patterns 7 which are not intersected with each other.
Specifically, the bottom of the measuring box 4 is provided with a threaded through hole 9, the base 3 is provided with a mounting hole, and the measuring box 4 is connected with the base 3 through the threaded through hole 9, the mounting hole and a bolt; the pitching angle of the measuring box 4 is adjusted and fixed through a bolt.
Optionally, the power module comprises a rechargeable battery, a solar panel and a charging module; the charging module is respectively connected with the solar panel and the rechargeable battery; the solar panel is used for converting solar energy into electric energy, and the charging module is used for charging the rechargeable battery after voltage regulation, rectification and filtering of the converted electric energy. (the power supply module in the present embodiment is not limited thereto)
Optionally, the communication module is a wireless communication module, and specifically, an RS485 wireless communication module can be adopted, so that the wireless communication distance is long, and the communication effect is good. (the communication module of the embodiment is not limited thereto)
Optionally, the storage module is a hard disk or a USB memory. (the memory module of the embodiment is not limited thereto)
Specifically, the processing module is a single chip microcomputer.
Example 1
And (3) a settlement reinforcing steel bar 8 is arranged on the enclosure pile top of a certain excavated square foundation pit for monitoring the settlement and horizontal displacement of the pile top. And (3) selecting a certain point on a wall surface as a datum point at a position which is far away from the foundation pit, does not generate displacement and has no line of sight shielding, and installing a calibration plate 2 on the wall surface. Fix the installation of base 3 on subsiding reinforcing bar 8, will measure box 4 and fix on base 3 through its bottom screw thread through-hole 9, adjust the angle of measuring box 4 for calibration plate 2 is located the monitoring range of camera 6, and the transparent safety cover 5 of installation is measured to the fixed angle of measuring box 4. The OpenMV programmable camera 6 is adopted for shooting and image processing, and the identification pattern 7 on the calibration board 2 is programmed through a computer, so that the OpenMV programmable camera 6 can identify the pattern on the calibration board 2. The OpenMV camera 6 is controlled to periodically collect pattern image data on the calibration plate 2, the collected image data of different frames are compared and processed through the single chip microcomputer, and horizontal displacement of pile top settlement towards or away from the foundation pit can be obtained through calculation.
Example 2
A settlement reinforcing steel bar 8 is arranged at a position, close to a slope surface, of a slope top of a certain slope for monitoring displacement of the slope top, 2 points are selected as datum points at positions, which are far away from the slope surface, do not displace and are shielded by no sight line, an inverted L-shaped reinforcing steel bar is arranged at each datum point, a calibration plate 2 is hung on the inverted L-shaped reinforcing steel bar, and the steel bar is fixed. Fix the installation of base 3 on subsiding reinforcing bar 8, will measure box 4 and fix on base 3 through its bottom screw thread through-hole 9, adjust the angle of measuring box 4 for calibration plate 2 is located the observation scope of camera 6, installs transparent safety cover 5. The camera 6 selects a DF-XX-camera, the singlechip selects a Risym AVR, and the singlechip is programmed to recognize the pattern on the calibration board 2. The cameras 6 are utilized to shoot 2 calibration plates 2 respectively so as to establish a three-dimensional coordinate network. And in each subsequent monitoring process, the camera 6 is utilized to respectively shoot 2 calibration plates 2, data is collected, and the three-dimensional displacement of the slope top point to be measured can be obtained through calculation.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. A displacement high-frequency observation method based on a multipoint reverse identification technology is characterized by comprising the following steps:
s1, mounting the calibration board at a position where displacement does not occur;
s2, mounting the base at a position where sedimentation and horizontal displacement easily occur;
s3, mounting the measuring box on the base, adjusting the pitching angle of the measuring box to enable the calibration plate to be positioned in the monitoring range of the camera, and fixing the angle of the measuring box;
s4, calibrating the pixel distance of the camera according to the sizes of the plurality of identification patterns on the calibration board and the actual distance, and establishing a pixel coordinate system of the image shot by the camera;
s5, installing a transparent protective cover on the base;
s6, periodically collecting image data of a plurality of identification patterns on the calibration plate through a camera, and calculating the settlement and horizontal displacement data of the base by using a processing module according to the coordinate change of the identification patterns on different frame images in a pixel coordinate system;
and S7, sending the image data obtained by monitoring and the calculated settlement and displacement data to a monitoring terminal through a communication module.
2. The displacement high-frequency observation method based on the multipoint reverse recognition technology as claimed in claim 1, wherein the plurality of identification patterns on the calibration plate are mutually exclusive.
3. The displacement high-frequency observation method based on the multipoint reverse recognition technology is characterized in that a threaded through hole is formed in the bottom of the measuring box, a mounting hole is formed in the base, and the measuring box is connected with the base through the threaded through hole, the mounting hole and a bolt; the pitching angle of the measuring box is adjusted and fixed through a bolt.
4. The displacement high-frequency observation method based on the multipoint reverse identification technology is characterized in that the power supply module comprises a rechargeable battery, a solar panel and a charging module; the charging module is respectively connected with the solar panel and the rechargeable battery.
5. The displacement high-frequency observation method based on the multipoint reverse identification technology as claimed in claim 1, wherein the processing module comprises a single chip microcomputer.
6. A displacement high-frequency observation device based on a multipoint reverse identification technology is based on the observation method of any one of claims 1 to 5, and is characterized by comprising a measuring device and a calibration plate; the measuring device comprises a base, a measuring box movably arranged on the base and a transparent protective cover arranged on the base, wherein the measuring box is arranged in the transparent protective cover; the inside of the measuring box is provided with a processing module, a power supply module connected with the processing module, a camera, a communication module and a storage module; a plurality of identification patterns with known sizes and distances are printed on the calibration board, and the identification patterns are positioned in the monitoring range of the camera; the calibration plate is arranged at a position where displacement does not occur, and the base is arranged at a position where sedimentation and horizontal displacement easily occur;
the camera is used for shooting images of a plurality of identification patterns on the calibration plate; the processing module is used for processing the shot images, calibrating the pixel distance according to the sizes and the actual distances of the plurality of identification patterns, and calculating the sedimentation and the horizontal displacement of the base according to the pixel coordinate change of the identification patterns on different frame images; the communication module is used for sending the shot images and the settlement and horizontal displacement data of the point locations to the monitoring terminal; the storage module is used for storing monitoring data; the power module is used for supplying power for the measuring box.
7. The displacement high-frequency observation device based on the multipoint reverse recognition technology as claimed in claim 6, wherein the plurality of identification patterns on the calibration plate are mutually exclusive.
8. The displacement high-frequency observation device based on the multipoint reverse recognition technology is characterized in that a threaded through hole is formed in the bottom of the measuring box, a mounting hole is formed in the base, and the measuring box is connected with the base through the threaded through hole, the mounting hole and a bolt; the pitching angle of the measuring box is adjusted and fixed through a bolt.
9. The displacement high-frequency observation device based on the multipoint reverse identification technology is characterized in that the power supply module comprises a rechargeable battery, a solar panel and a charging module; the charging module is respectively connected with the solar panel and the rechargeable battery.
10. The displacement high-frequency observation device based on the multipoint reverse identification technology as claimed in claim 6, wherein the processing module comprises a single chip microcomputer.
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| CN113188512A (en) * | 2021-05-08 | 2021-07-30 | 深圳市鹰眼在线电子科技有限公司 | Pavement settlement camera monitoring system |
| CN113899339A (en) * | 2021-09-07 | 2022-01-07 | 广州小鹏自动驾驶科技有限公司 | Distance detection method and device and vehicle |
| CN113899339B (en) * | 2021-09-07 | 2024-06-07 | 广州小鹏自动驾驶科技有限公司 | Distance detection method and device and vehicle |
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Application publication date: 20200221 |