CN110132159B - Bridge deflection measuring method and device and computer readable storage medium - Google Patents
Bridge deflection measuring method and device and computer readable storage medium Download PDFInfo
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- CN110132159B CN110132159B CN201910500656.2A CN201910500656A CN110132159B CN 110132159 B CN110132159 B CN 110132159B CN 201910500656 A CN201910500656 A CN 201910500656A CN 110132159 B CN110132159 B CN 110132159B
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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
- G01B11/16—Measuring arrangements characterised by the use of optical techniques for measuring the deformation in a solid, e.g. optical strain gauge
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M5/00—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings
- G01M5/0008—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings of bridges
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M5/00—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings
- G01M5/0041—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings by determining deflection or stress
- G01M5/005—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings by determining deflection or stress by means of external apparatus, e.g. test benches or portable test systems
Abstract
The invention discloses a method for measuring bridge deflection, wherein a device for measuring bridge deflection comprises a camera assembly, and the method for measuring bridge deflection comprises the following steps: determining a deflection detection point; controlling the camera shooting assembly to acquire a first image comprising the deflection detection point; controlling the camera shooting assembly to move a first distance towards a preset direction, and controlling the camera shooting assembly to acquire a second image comprising the deflection detection point; and determining the bridge deflection corresponding to the deflection detection point according to the first distance, the first image and the second image. The invention also discloses a device for measuring the bridge deflection and a computer readable storage medium, which carry out self-calibration through the image change and the moving distance which are acquired by the camera assembly and comprise the deflection characteristic points so as to determine the deflection corresponding to the deflection detection points, thereby realizing the simplification of the steps of deflection measurement, reducing the difficulty of deflection measurement and being applicable to various different measuring environments.
Description
Technical Field
The invention relates to the field of bridge measurement, in particular to a method and a device for measuring bridge deflection and a computer readable storage medium.
Background
The bridge is an important component of a transportation network and has an important position in national economic life, so that the safety and reliability of the bridge structure are extremely important to ensure. The deflection is a key performance parameter for evaluating the safety of the bridge, and the bridge deflection monitoring has important significance for knowing the health condition and the working state of the existing bridge and provides important basis for the bearing capacity and the operation condition of the bridge.
When the bridge deflection is detected, steel wires need to be arranged at each detection point or a frame needs to be erected, so that the measurement cannot be carried out when water exists under the bridge; when the bridge is a overpass bridge, the method cannot be used due to the influence of the traffic clearance of railways or highways; high bridges crossing canyons and the like cannot be directly measured; whether the measuring instruments are arranged or cancelled, the arrangement is complicated, the time consumption is long, and therefore the detection of the bridge deflection is very complicated, and the requirement on the measuring environment is high.
The above is only for the purpose of assisting understanding of the technical aspects of the present invention, and does not represent an admission that the above is prior art.
Disclosure of Invention
The invention mainly aims to provide a method and a device for measuring bridge deflection and a computer readable storage medium, aiming at determining the deflection corresponding to a deflection detection point by self-calibrating the image change and the moving distance of a deflection characteristic point acquired by a camera component, simplifying the steps of deflection measurement, reducing the difficulty of deflection measurement and being applicable to various different measuring environments.
In order to achieve the aim, the invention provides a method for measuring bridge deflection, which comprises the following steps:
determining a deflection detection point;
controlling the camera shooting assembly to acquire a first image comprising the deflection detection point;
controlling the camera shooting assembly to move a first distance towards a preset direction, and controlling the camera shooting assembly to acquire a second image comprising the deflection detection point;
and determining the bridge deflection corresponding to the deflection detection point according to the first distance, the first image and the second image.
Optionally, the step of determining the bridge deflection corresponding to the deflection detection point according to the first distance, the first image and the second image includes:
acquiring a second distance of the deflection detection point in the first image and the second image, wherein the second distance is offset in the preset direction;
and determining the bridge deflection according to the first distance and the second distance.
Optionally, the step of acquiring a second distance, in which the deflection detection point is offset in the preset direction, in the first image and the second image includes:
acquiring a first coordinate of the deflection detection point in the first image and acquiring a second coordinate of the deflection detection point in the second image;
and acquiring a second distance of the deflection detection point in the offset direction according to the first coordinate and the second coordinate.
Optionally, the step of determining the bridge deflection from the first distance and the second distance comprises:
acquiring the ratio of the first distance to the second distance;
and determining the bridge deflection according to the ratio.
Optionally, the step of determining the bridge deflection according to the ratio comprises:
acquiring a third distance of vertical offset of the deflection detection point, wherein the third distance is the distance of the deflection detection point in the image detected within a preset time length in the vertical direction;
and acquiring the bridge deflection according to the ratio and the third distance.
Optionally, the step of determining a deflection detection point comprises:
determining the center position of the bridge;
and determining the deflection detection point according to the central position of the bridge.
Optionally, the preset direction is a vertical direction.
In addition, in order to achieve the above object, the present invention further provides a device for measuring bridge deflection, including: the bridge deflection measuring method comprises a camera shooting assembly, a memory, a processor and a bridge deflection measuring program which is stored on the memory and can run on the processor, wherein the camera shooting assembly is connected with the processor, and the bridge deflection measuring program is executed by the processor to realize the steps of the bridge deflection measuring method.
Optionally, the device for measuring bridge deflection further comprises a lifting assembly and a base, wherein one end of the lifting assembly is fixedly connected with the camera assembly, the other end of the lifting assembly is fixedly connected with the base, and the lifting assembly is connected with the processor.
In addition, to achieve the above object, the present invention further provides a computer readable storage medium, on which a bridge deflection measuring program is stored, which when executed by a processor implements the steps of the bridge deflection measuring method according to any one of the above.
The method, the device and the computer-readable storage medium for measuring the bridge deflection provided by the embodiment of the invention are used for determining deflection detection points; controlling the camera shooting assembly to acquire a first image comprising the deflection detection point; controlling the camera shooting assembly to move a first distance towards a preset direction, and controlling the camera shooting assembly to acquire a second image comprising the deflection detection point; and determining the bridge deflection corresponding to the deflection detection point according to the first distance, the first image and the second image, and performing self-calibration through image change and moving distance which are acquired by a camera assembly and comprise deflection characteristic points to determine the deflection corresponding to the deflection detection point, thereby simplifying the deflection measurement steps, reducing the deflection measurement difficulty and being applicable to various different measurement environments.
Drawings
Fig. 1 is a schematic terminal structure diagram of a hardware operating environment according to an embodiment of the present invention;
FIG. 2 is a schematic flow chart of an embodiment of the method for measuring bridge deflection of the present invention;
FIG. 3 is a detailed flowchart of step S40 in FIG. 2;
fig. 4 is a detailed flowchart of step S10 in fig. 2.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The main solution of the embodiment of the invention is as follows:
determining a deflection detection point;
controlling the camera shooting assembly to acquire a first image comprising the deflection detection point;
controlling the camera shooting assembly to move a first distance towards a preset direction, and controlling the camera shooting assembly to acquire a second image comprising the deflection detection point;
and determining the bridge deflection corresponding to the deflection detection point according to the first distance, the first image and the second image.
In the prior art, when the deflection of the bridge is detected, steel wires need to be arranged at each detection point or a frame needs to be erected, so that the measurement cannot be carried out when water exists under the bridge; when the bridge is a overpass bridge, the method cannot be used due to the influence of the traffic clearance of railways or highways; high bridges crossing canyons and the like cannot be directly measured; whether the measuring instruments are arranged or cancelled, the arrangement is complicated, the time consumption is long, and therefore the detection of the bridge deflection is very complicated, and the requirement on the measuring environment is high.
The invention provides a solution, which is characterized in that the deflection corresponding to a deflection detection point is determined by self-calibration of the image change and the moving distance of the deflection characteristic point acquired by a camera component, so that the steps of deflection measurement are simplified, the difficulty of deflection measurement is reduced, and the method can be used in various different measurement environments.
As shown in fig. 1, fig. 1 is a schematic terminal structure diagram of a hardware operating environment according to an embodiment of the present invention.
The terminal of the embodiment of the invention is a high-precision camera device.
As shown in fig. 1, the terminal may include: a processor 1001, such as a CPU, a network interface 1004, a user interface 1003, a memory 1005, a communication bus 1002. Wherein a communication bus 1002 is used to enable connective communication between these components. The user interface 1003 may include a Display screen (Display), an input unit such as a Keyboard (Keyboard), and the optional user interface 1003 may also include a standard wired interface, a wireless interface. The network interface 1004 may optionally include a standard wired interface, a wireless interface (e.g., WI-FI interface). The memory 1005 may be a high-speed RAM memory or a non-volatile memory (e.g., a magnetic disk memory). The memory 1005 may alternatively be a storage device separate from the processor 1001.
Those skilled in the art will appreciate that the terminal structure shown in fig. 1 is not intended to be limiting and may include more or fewer components than those shown, or some components may be combined, or a different arrangement of components.
As shown in fig. 1, a memory 1005, which is a kind of computer storage medium, may include therein an operating system, a network communication module, a user interface module, and a measurement program of bridge deflection.
In the terminal shown in fig. 1, the network interface 1004 is mainly used for connecting to a backend server and performing data communication with the backend server; the user interface 1003 is mainly used for connecting a client (user side) and performing data communication with the client; and the processor 1001 may be configured to call up a measurement program of bridge deflection stored in the memory 1005 and perform the following operations:
determining a deflection detection point;
controlling the camera shooting assembly to acquire a first image comprising the deflection detection point;
controlling the camera shooting assembly to move a first distance towards a preset direction, and controlling the camera shooting assembly to acquire a second image comprising the deflection detection point;
and determining the bridge deflection corresponding to the deflection detection point according to the first distance, the first image and the second image.
Further, the processor 1001 may call a measurement program of bridge deflection stored in the memory 1005, and also perform the following operations:
acquiring a second distance of the deflection detection point in the first image and the second image, wherein the second distance is offset in the preset direction;
and determining the bridge deflection according to the first distance and the second distance.
Further, the processor 1001 may call a measurement program of bridge deflection stored in the memory 1005, and also perform the following operations:
acquiring a first coordinate of the deflection detection point in the first image and acquiring a second coordinate of the deflection detection point in the second image;
and acquiring a second distance of the deflection detection point in the offset direction according to the first coordinate and the second coordinate.
Further, the processor 1001 may call a measurement program of bridge deflection stored in the memory 1005, and also perform the following operations:
acquiring the ratio of the first distance to the second distance;
and determining the bridge deflection according to the ratio.
Further, the processor 1001 may call a measurement program of bridge deflection stored in the memory 1005, and also perform the following operations:
acquiring a third distance of vertical offset of the deflection detection point, wherein the third distance is the distance of the deflection detection point in the image detected within a preset time length in the vertical direction;
and acquiring the bridge deflection according to the ratio and the third distance.
Further, the processor 1001 may call a measurement program of bridge deflection stored in the memory 1005, and also perform the following operations:
determining the center position of the bridge;
and determining the deflection detection point according to the central position of the bridge.
Further, the processor 1001 may call a measurement program of bridge deflection stored in the memory 1005, and also perform the following operations:
and controlling the camera shooting assembly to move a first distance towards the vertical direction.
Referring to fig. 2, in an embodiment, the method for measuring the bridge deflection comprises the following steps:
step S10, determining a deflection detection point;
in the embodiment, the deflection is a key performance parameter for evaluating the safety of the bridge, and the monitoring of the deflection of the bridge has important significance for knowing the health condition and the working state of the existing bridge, and provides an important basis for the bearing capacity and the operation condition of the bridge. The self-calibration of a camera assembly in the bridge deflection measuring device can be used for detecting and monitoring various displacement phenomena such as bridge deflection, ground settlement, landslide, building settlement and the like. In addition, the technical scheme disclosed by the embodiment can be used for measuring the deflection of the bridge in the vertical direction and can also be used for measuring the deformation in any other direction. When the camera shooting assembly is subjected to self-calibration, firstly, a deflection detection point needs to be determined, the deflection detection point needs to have obvious identification characteristics, and the ratio of the actual distance to the image distance can be measured through the deflection detection point. Any one of the deflection characteristic point and the bridge deflection measuring device is required to be positioned on the bridge to be detected, so that the deflection of the bridge changes after a long time, the vertical displacement of the deflection characteristic point or the bridge deflection measuring device can be obtained, and the change of the bridge deflection is calculated by combining the ratio of the actual distance and the image distance. The deformation of the middle part of the bridge is generally the largest, so when the maximum deflection of the bridge is measured, the central position of the bridge can be determined, the characteristic point which is on the surface of the bridge and is closest to the central position is further determined, the characteristic point is used as a deflection detection point, and the deflection of the bridge detected by the deflection detection point is used as the maximum deflection of the bridge. As another determination method of the deflection detection point, after the camera assembly is controlled to acquire the image, a measurer is prompted to mark a specific position of the deflection detection point in the image. Or the characteristics of the deflection detection point are obtained through a plurality of images of the deflection detection point, and after the image is obtained by controlling the camera shooting assembly, the specific position of the deflection detection point in the image is identified according to the characteristics of the deflection detection point.
Step S20, controlling the camera shooting assembly to collect a first image comprising the deflection detection point;
step S30, controlling the camera shooting assembly to move a first distance towards a preset direction, and controlling the camera shooting assembly to acquire a second image comprising the deflection detection point;
in this embodiment, after the deflection detection point is determined, the camera assembly may be controlled to capture an image. The camera assembly may include a measuring camera, a lens, an image capture card, etc. Because the measurement of the bridge deflection needs to be very accurate, the camera assembly generally adopts a camera with higher accuracy. In order to ensure that the acquired image is more stable, the camera shooting assembly can be fixed on the ground or other static objects through the base in the bridge deflection measuring device, so that the shaking phenomenon of the camera shooting assembly when the image is acquired is prevented. When the first image is collected, parameters such as the angle, the focal length, the image brightness, the contrast and the like of the measuring camera can be adjusted according to the actual measuring environment, so that the deflection detection point in the image is as clear as possible and is convenient to distinguish. And the deflection detection point can be positioned in the middle area of the image so as to be convenient for a measurer to observe. And after the camera shooting assembly is controlled to collect a first image comprising the deflection detection point, the camera shooting assembly is controlled to move a first distance towards a preset direction. The step of moving the camera shooting assembly can be realized by a lifting assembly in the bridge deflection measuring device, wherein the lifting assembly can be arranged between the base and the camera shooting assembly, one end of the lifting assembly is fixedly connected with the camera shooting assembly, and the other end of the lifting assembly is connected with the base, so that the aim of controlling the camera shooting assembly to move a first distance in a preset direction can be realized by controlling the lifting of the lifting assembly. For more accurate deflection measurement, the preset direction may be a vertical direction, so that the lifting assembly can be lifted in the vertical direction. The lifting assembly may further include a scale to facilitate a measuring person reading the first distance. As another way of moving the camera assembly, the lift assembly may be replaced with a motor of known precision to achieve precise movement of the camera assembly. And after the camera shooting assembly is controlled to move a first distance towards the preset direction, the camera shooting assembly can be controlled to acquire a second image comprising the deflection detection point.
And step S40, determining the bridge deflection corresponding to the deflection detection point according to the first distance, the first image and the second image.
In this embodiment, since the first image and the second image respectively acquired before and after the camera assembly moves the first distance in the preset direction both include the deflection detection point, the distance that the deflection detection point is shifted in the image, that is, the second distance, can be calculated. And determining the bridge deflection corresponding to the deflection detection point according to the ratio of the first distance to the second distance. In addition, the camera shooting assembly can further comprise a positioning module and a data transmission module, so that the measuring device of the bridge deflection can be conveniently positioned, the obtained image data can be conveniently transmitted to a computer and other intelligent equipment terminals in a wired or wireless mode, calculation and analysis of the bridge deflection can be conveniently carried out, and an analysis result can be sent to one end of a measurer.
In the technical scheme disclosed in the embodiment, the deflection corresponding to the deflection detection point is determined by self-calibration of the image change including the deflection characteristic point and the moving distance acquired by the camera assembly, so that the deflection measurement steps are simplified, the deflection measurement difficulty is reduced, and the method can be used in various different measurement environments.
In another embodiment, as shown in fig. 3, on the basis of the embodiment shown in fig. 2, the step S40 includes:
step S41, acquiring a second distance of the deflection detection point in the first image and the second image, which is deviated in the preset direction;
in this embodiment, after the first distance, the first image, and the second image are acquired, the second distance of the deflection detection point in the preset direction can be measured according to the first image and the second image. Firstly, a coordinate system is established by the first image and the second image respectively, and the origin points of the coordinate system in the first image and the second image can be corresponding points in the edge part of the images, namely, under the condition that the sizes of the first image and the second image are the same, the distance from the corresponding point in the first image to any vertex in the first image is equal to the distance from the corresponding point in the second image to the corresponding vertex in the second image. After coordinate systems are respectively established on the first image and the second image, a first coordinate of a deflection detection point in the first image is obtained, and a second coordinate of the deflection detection point in the second image is obtained. And calculating a second distance of deflection detection point offset according to the first coordinate and the second coordinate.
And step S42, determining the bridge deflection according to the first distance and the second distance.
In this embodiment, after the second distance is obtained, the ratio of the first distance to the second distance is the ratio of the actual distance to the image distance. After the ratio of the first distance to the second distance is measured, the device for measuring the bridge deflection can still be fixed in the original position, and after the deflection detection point is observed for a long time, the bridge begins to bend downwards due to the slow deformation of the bridge under the action of gravity, so that the phenomenon of the middle part of the bridge bends downwards is more obvious. At the moment, the deflection detection point can vertically and downwardly deflect in the image collected by the camera assembly, so that the camera assembly is controlled to collect images before and after the slow deformation of the bridge, and a third distance of the deflection detection point in the image detected within the preset time length in the vertical direction can be obtained. Since the third distance is a distance in the image, an actual distance corresponding to the third distance can be calculated according to the ratio of the first distance to the second distance and the third distance, and the actual distance corresponding to the third distance is used as the bridge deflection corresponding to the deflection detection point.
In addition, the deflection of the bridge can be measured for multiple times, so that the change of the deflection of the bridge at different time points is obtained, whether the quality of the bridge is qualified or not is judged according to the change trend of the deflection of the bridge, the service life of the bridge is calculated, and the like.
In the technical scheme disclosed in this embodiment, a second distance of the deflection detection point in the first image and the second image is obtained, the deflection of the bridge is determined according to the first distance and the second distance, and the deflection of the bridge is determined through the change of the image containing the characteristic point of the bridge, so that the measurement of the deflection of the bridge is simpler and more convenient, and the difficulty in implementing a deflection measurement project is reduced.
In yet another embodiment, as shown in fig. 4, on the basis of the embodiment shown in any one of fig. 2 to 3, the step S10 includes:
step S11, determining the center position of the bridge;
in this embodiment, the deflection detection points are typically feature points on the bridge that are easy to distinguish. When the deflection detection point is determined, in order to detect the bridge deflection at different points on the bridge, the characteristic points at different positions can be selected as the deflection detection point. When measuring the maximum deflection of a bridge, generally, a characteristic point of the middle part of the bridge is selected as a deflection characteristic point, namely the center position of the bridge. The bridge is generally designed to be arched, so the center position of the bridge is generally positioned at the top of the arch.
And step S12, determining the deflection detection point according to the center position of the bridge.
In this embodiment, after the central position of the bridge is determined, a feature point on the surface of the bridge and closest to the central position is determined, and the feature point is used as the deflection detection point, and the bridge deflection obtained from the deflection detection point can be regarded as the maximum deflection of the bridge. As another determination method of the deflection detection point, after the camera assembly is controlled to acquire the image, a measurer is prompted to mark a specific position of the deflection detection point in the image. After the maximum deflection of the bridge is obtained, the overall quality and the service life of the bridge can be determined according to the maximum deflection so as to facilitate maintenance, safety evaluation of the bridge, acceptance of a new bridge and the like of the bridge.
In the technical scheme disclosed in the embodiment, the center position of the bridge is determined, and the deflection detection point is determined according to the center position of the bridge, so that the deflection of the bridge is measured according to the deflection detection point, and the purpose of measuring the maximum deflection of the bridge is achieved.
In addition, the embodiment of the invention also provides a device for measuring the bridge deflection, which comprises: the bridge deflection measuring method comprises a camera shooting assembly, a memory, a processor and a bridge deflection measuring program which is stored on the memory and can run on the processor, wherein the camera shooting assembly is connected with the processor, and the steps of the bridge deflection measuring method in the embodiment are realized when the bridge deflection measuring program is executed by the processor.
The device for measuring the bridge deflection further comprises a lifting assembly and a base, wherein one end of the lifting assembly is fixedly connected with the camera assembly, the other end of the lifting assembly is fixedly connected with the base, and the lifting assembly is connected with the processor.
In addition, an embodiment of the present invention further provides a computer-readable storage medium, where a program for measuring bridge deflection is stored on the computer-readable storage medium, and when the program is executed by a processor, the steps of the method for measuring bridge deflection described in the above embodiment are implemented.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or system. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or system that comprises the element.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium (e.g., ROM/RAM, magnetic disk, optical disk) as described above and includes instructions for enabling a terminal device (e.g., a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present invention.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (7)
1. The method for measuring the bridge deflection is characterized in that a device for measuring the bridge deflection comprises a camera assembly, and the method for measuring the bridge deflection comprises the following steps:
determining a deflection detection point;
controlling the camera shooting assembly to acquire a first image comprising the deflection detection point;
controlling the camera shooting assembly to move a first distance towards a preset direction, and controlling the camera shooting assembly to acquire a second image comprising the deflection detection point;
acquiring a second distance of the deflection detection point in the first image and the second image, wherein the second distance is offset in the preset direction;
determining the bridge deflection according to the first distance and the second distance;
acquiring the ratio of the first distance to the second distance;
acquiring a third distance of vertical offset of the deflection detection point, wherein the third distance is the distance of the deflection detection point in the image detected within a preset time length in the vertical direction;
and acquiring the bridge deflection according to the ratio and the third distance.
2. The method for measuring the deflection of the bridge according to claim 1, wherein the step of obtaining a second distance of the deflection detection point in the first image and the second image, which is offset in the preset direction, comprises:
acquiring a first coordinate of the deflection detection point in the first image and acquiring a second coordinate of the deflection detection point in the second image;
and acquiring a second distance of the deflection detection point in the offset direction according to the first coordinate and the second coordinate.
3. The method for measuring bridge deflection of claim 1, wherein the step of determining the deflection detection point comprises:
determining the center position of the bridge;
and determining the deflection detection point according to the central position of the bridge.
4. A method of measuring bridge deflection as claimed in claim 1, wherein said predetermined direction is vertical.
5. A bridge deflection measuring device is characterized by comprising: a camera assembly, a memory, a processor and a bridge deflection measuring program stored on the memory and executable on the processor, the camera assembly being connected with the processor, the bridge deflection measuring program when executed by the processor implementing the steps of the bridge deflection measuring method according to any one of claims 1 to 4.
6. The bridge deflection measuring device of claim 5, further comprising a lifting assembly and a base, wherein one end of the lifting assembly is fixedly connected with the camera assembly, the other end of the lifting assembly is fixedly connected with the base, and the lifting assembly is connected with the processor.
7. A computer-readable storage medium, characterized in that the computer-readable storage medium has stored thereon a measuring program of bridge deflection, which when executed by a processor implements the steps of the measuring method of bridge deflection according to any one of claims 1 to 4.
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| CN110617775B (en) * | 2019-09-26 | 2021-07-23 | 杭州鲁尔物联科技有限公司 | Method, device and system for monitoring bridge deflection based on visual perception |
| CN112857305A (en) * | 2019-11-28 | 2021-05-28 | 湖南五新模板有限公司 | Landing stage of detectable deformation state |
| CN111504245B (en) * | 2020-04-24 | 2022-01-28 | 山东高速工程检测有限公司 | Bridge linear measuring method in operation period |
| CN114965969B (en) * | 2022-05-13 | 2023-07-28 | 上海同丰工程咨询有限公司 | Wireless sensor-based intelligent monitoring and early warning system for health of large-span bridge structure |
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