CN112097668A - Bridge deflection measuring device - Google Patents
Bridge deflection measuring device Download PDFInfo
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- CN112097668A CN112097668A CN202011202414.4A CN202011202414A CN112097668A CN 112097668 A CN112097668 A CN 112097668A CN 202011202414 A CN202011202414 A CN 202011202414A CN 112097668 A CN112097668 A CN 112097668A
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- bridge deflection
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- laser
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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
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- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Aviation & Aerospace Engineering (AREA)
- Length Measuring Devices By Optical Means (AREA)
- Optical Radar Systems And Details Thereof (AREA)
Abstract
The invention discloses a bridge deflection measuring device which comprises an auxiliary target unit arranged at the bottom end of a bridge and an auto-collimation laser unit arranged corresponding to the auxiliary target unit. The self-collimation laser unit is connected with the remote terminal, and is used for emitting infrared laser to the auxiliary target unit, receiving reflected light signals reflected by the auxiliary target unit, determining a bridge deflection value according to the reflected light signals, and sending the bridge deflection value to the remote terminal. The bridge deflection measuring device of the invention uses laser ranging to prove that the device has good measuring precision; the device has simple structure, extremely high cost performance and convenient operability; but also in complex environments.
Description
Technical Field
The invention relates to the field of bridge detection, in particular to a bridge deflection measuring device.
Background
The deflection deformation of the bridge is an important parameter for evaluating the health condition of the bridge, and the static and dynamic deflection values of the bridge need to be accurately measured in the aspects of bridge detection, dangerous bridge reconstruction, new bridge acceptance and the like. With the progress of bridge health detection technology, many methods for displacement and deflection measurement are researched. At present, the method for measuring the bridge deflection at home and abroad mainly comprises the following steps: the method comprises two aspects of the traditional manual measurement method and the automatic bridge deflection detection technology.
Traditional manual measurements include: dial indicator measuring method, precision level measuring method and total station measuring method. The traditional manual measurement method generally has the problems of high operation difficulty and low precision, and detailed description is omitted here, and the automatic bridge deflection detection technology is mainly introduced. The automatic detection technology for bridge deflection mainly comprises the following measuring methods: a communicating tube measuring method, an inclinometer method and a laser image deflection measuring method.
Principle of communicating tube measurement: and obtaining the deflection change of the bridge according to the height change of the liquid level in the communication pipes arranged at each position of the bridge. When the bridge body is deformed, the water pipes fixed on the bridge body move along with the bridge body, at the moment, the liquid level in each vertical water pipe is kept at the same horizontal plane with the liquid level at the reference point, but the liquid level of each vertical water pipe at each measuring point moves relatively in different sizes, and the measured relative displacement is the deflection value of the measured point. However, the bridge deflection measured by the method is a relative error of the bridge deflection, and the precision of the bridge deflection cannot be guaranteed when the bridge deflection value is less than 20 mm.
The working principle of the inclinometer method is as follows: firstly, the inclination angles of a plurality of sections of the bridge when the bridge is deformed are measured by using an inclinometer, an inclination angle curve is fitted according to the inclination angles, and then a deflection curve is obtained, so that the deflection value of any point on the bridge can be obtained. The inclinometer measurement method is characterized in that: the bridge does not need a static reference point, is particularly suitable for measuring river-crossing bridges, large-scale sea-crossing bridges, canyon-crossing bridges and high bridges, and can improve the measurement efficiency. But has the disadvantages of great operation difficulty and complex measurement.
The laser image deflection measurement method utilizes the good directivity of laser. Along with the deformation of the bridge in different degrees, the laser spot center irradiated on the photoelectric receiver with the fixed measured point changes in equal quantity, so that the bridge deflection can be obtained as long as the spot center position is obtained. The laser image deflection measuring method has the advantages of high measuring precision which can reach 0.1mm and high sampling rate. However, the method has higher requirements on the camera at the receiving end in order to ensure the accuracy of measurement, and the image algorithm is relatively complex to process and does not meet the requirements of high cost performance and convenient development; and meanwhile, the CMOS camera has a fragile risk, so that the CMOS camera is not suitable for working under complicated test conditions.
Disclosure of Invention
The invention mainly aims to provide a bridge deflection measuring device, which improves the cost performance of products and the applicability in a complex environment while ensuring the measuring precision, and is simple to operate and easy to operate.
In order to achieve the purpose, the invention provides the following technical scheme:
a bridge deflection measuring device comprises:
the auxiliary target unit is arranged at the bottom end of the bridge;
and the auto-collimation laser unit is connected with the remote terminal, corresponds to the auxiliary target unit, and is used for emitting infrared laser to the auxiliary target unit, receiving reflected light signals reflected by the auxiliary target unit, determining a bridge deflection value according to the reflected light signals, and sending the bridge deflection value to the remote terminal.
Optionally, the auto-collimation laser unit includes:
the laser ranging transmitting module is used for transmitting infrared laser to the auxiliary target unit;
the laser ranging receiving module is used for receiving the reflected light signal reflected by the auxiliary target unit;
the micro control unit MCU is connected with the laser ranging receiving module and the remote terminal and is used for determining a bridge deflection value according to the reflected light signal and sending the bridge deflection value to the remote terminal;
the first shell is used for placing the laser ranging transmitting module, the laser ranging receiving module and the MCU;
the first hoisting crane is fixedly connected with the first shell and used for adjusting the height of the first shell through lifting, so that the heights of the laser ranging transmitting module and the laser ranging receiving module are matched with the height of the auxiliary target unit.
Optionally, the auto-collimation laser unit further includes:
and the wireless communication module is arranged in the first shell, is respectively connected with the MCU and the remote terminal, and is used for transmitting the bridge flexibility value to the remote terminal.
Optionally, the wireless communication module is a wireless antenna.
Optionally, the auxiliary target unit comprises:
the receiving end diffuse reflection plate is used for reflecting the infrared laser emitted by the auto-collimation laser unit;
the second shell is used for placing the receiving end diffuse reflection plate;
and the second hoisting crane is fixedly connected with the second shell and used for adjusting the height of the second shell through lifting so that the height of the second shell is matched with the height of the auto-collimation laser unit.
Optionally, the auxiliary target unit further comprises:
and the reflecting plate angle rotating device is fixedly connected with the receiving end diffuse reflection plate.
Optionally, an original reflection film is adhered to the surface of the receiving-end diffuse reflection plate, so that a reflected light signal returns along an original path of an optical path of the infrared laser emitted by the auto-collimation laser unit.
Optionally, the second casing includes storage tank and transparent shield, the storage tank forms the accommodation space with the shield, place in the accommodation space receiving terminal diffuse reflection board, the infrared laser of auto-collimation laser unit transmission passes through the shield shines on the receiving terminal diffuse reflection board.
Optionally, the inner color of the second housing is black.
Optionally, the bridge deflection measuring device further comprises:
the wireless receiving unit is used for receiving the bridge deflection value sent by the auto-collimation laser unit and transmitting the bridge deflection value to the remote terminal;
the wireless receiving unit comprises a receiving wireless antenna, a portable acquisition module and a Universal Serial Bus (USB) port;
the receiving wireless antenna is connected with the portable acquisition module and is used for receiving the bridge deflection value sent by the auto-collimation laser unit and transmitting the bridge deflection value to the portable acquisition module;
the portable acquisition module is connected with the remote terminal through a USB port, and the portable acquisition module transmits the received bridge deflection value to the remote terminal.
According to the specific embodiment provided by the invention, the invention discloses the following technical effects:
the self-collimation laser unit in the bridge deflection measuring device emits infrared laser to the auxiliary target unit, receives reflected light signals reflected by the auxiliary target unit, determines a bridge deflection value according to the reflected light signals, and sends the bridge deflection value to the remote terminal. The bridge deflection measuring device ensures good precision by using laser ranging; the device has simple structure and improves the cost performance of the product; the device has convenient operability and can work in a complex environment.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a bridge deflection measuring device according to the present invention;
FIG. 2 is a schematic structural diagram of a self-collimating laser unit in the bridge deflection measuring device according to the present invention;
FIG. 3 is a schematic structural diagram of an auxiliary target unit in the bridge deflection measuring apparatus according to the present invention;
fig. 4 is a schematic structural diagram of a wireless receiving unit in the bridge deflection measuring device of the present invention.
Description of the symbols:
1-auxiliary target unit, 2-auto-collimation laser unit, 3-remote terminal, 4-wireless receiving unit, 11-second hoist and mount crane, 12-second casing, 13-receiving end diffuse reflection board, 14-reflecting board angle rotating device, 15-receiving shield, 21-first casing, 22-first hoist and mount crane, 23-transmission window flap, 24-220 VAC alternating current power supply socket, 25-wireless antenna, 41-receiving wireless antenna, 42-portable collection module, 43-USB port.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the 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.
The invention provides a bridge deflection measuring device, which is characterized in that an auto-collimation laser unit emits infrared laser to an auxiliary target unit, receives a reflected light signal reflected by the auxiliary target unit, determines a bridge deflection value according to the reflected light signal and sends the bridge deflection value to a remote terminal; the method improves the cost performance and operability of the product while ensuring the measurement precision, and can also work in a complex environment.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
As shown in fig. 1, the bridge deflection measuring device of the present invention includes an auxiliary target unit 1 and a self-collimating laser unit 2.
The auxiliary target unit 1 is arranged at the bottom of the bridge. The auto-collimation laser unit 2 is connected with the remote terminal 3 and is arranged corresponding to the auxiliary target unit 1; the self-collimation laser unit 2 is used for emitting infrared laser to the auxiliary target unit 1, receiving reflected light signals reflected by the auxiliary target unit 1, determining a bridge deflection value according to the reflected light signals, and sending the bridge deflection value to the remote terminal 3.
In this embodiment, the bridge deflection measuring device further includes a wireless receiving unit 4, and the wireless receiving unit 4 is configured to receive the bridge deflection value sent by the auto-collimation laser unit 2, and transmit the bridge deflection value to the remote terminal 3.
Further, the auto-collimation laser Unit 2 includes a laser ranging transmitting module, a laser ranging receiving module, an MCU (Micro Control Unit), a first housing 21 and a first hoisting crane 22.
The laser ranging and transmitting module is used for transmitting infrared laser to the auxiliary target unit 1; the laser ranging receiving module is used for receiving a reflected light signal reflected by the auxiliary target unit 1; the MCU is connected with the laser ranging receiving module and the remote terminal 3 and is used for determining a bridge flexibility value according to the reflected light signal and sending the bridge flexibility value to the remote terminal 3; the first shell 21 is used for placing the laser ranging transmitting module, the laser ranging receiving module and the MCU; the first hoisting crane 22 is fixedly connected with the first shell 21 and used for adjusting the height of the first shell 21 through lifting, so that the heights of the laser ranging transmitting module and the laser ranging receiving module are matched with the height of the auxiliary target unit 1.
Preferably, the auto-collimation laser unit 2 further comprises a wireless communication module; the wireless communication module is arranged in the first shell 21 and is respectively connected with the MCU and the remote terminal 3, and the wireless communication module is used for sending the bridge flexibility value to the remote terminal 3.
As shown in fig. 2, in this embodiment, the self-collimating laser unit 2 further comprises a transmission window cover 23, a 220VAC ac power outlet 24. In this embodiment, the wireless communication module is a wireless antenna 25.
Further, the auxiliary target unit 1 in the bridge deflection measuring device of the invention comprises a second hoisting crane 11, a second shell 12, a receiving end diffuse reflection plate 13, a reflection plate rotating device 14 and a dust cover 15.
The second hoisting crane 11 is fixedly connected with the second shell 12, and the height of the second shell 12 is adjusted through lifting, so that the height of the second shell 12 is matched with the height of the auto-collimation laser unit 2.
Specifically, when the bridge deflection measurement is started, the second hoisting crane 11 adjusts the height of the auxiliary target unit 1 through the expansion and contraction of the telescopic rod, so that the infrared laser emitted by the auto-collimation laser unit 2 irradiates the central position of the receiving end diffuse reflection plate 13 through the dust cover 15.
The second casing 12 includes storage tank and transparent shield 15, storage tank and shield 15 form the accommodation space, place in the accommodation space receiving terminal diffuse reflection board 13, the infrared laser of auto-collimation laser unit 2 transmission passes through shield 15 shines on the receiving terminal diffuse reflection board 13.
Preferably, the inside of the second housing 12 is roughened; the inner color of the second shell is black; the black inner wall is used for absorbing diffuse reflection clutter generated after infrared laser emitted by the auto-collimation laser unit 2 penetrates through the dustproof cover 15 and irradiates the receiving end diffuse reflection plate 13, and the influence of the diffuse reflection clutter on the measurement precision is reduced.
In addition, the bridge deflection measuring device often works outdoors, the working environment is humid, and a dustproof cover 15 is designed to avoid interference of device corrosion on the measuring precision; and in order to prevent the equipment from being corroded due to moisture, a drying agent is placed in the containing groove.
In the present embodiment, the receiving-end diffuse reflection plate 13 is used for reflecting the infrared laser light emitted by the auto-collimation laser unit 2; an original reflection film is adhered to the surface of the receiving-end diffuse reflection plate 13, so that a reflected light signal returns along the original path of the optical path of the infrared laser emitted by the auto-collimation laser unit 2; meanwhile, the primary reflecting film can enhance the intensity of the reflected light signal.
The reflecting plate angle rotating device 14 is fixedly connected with the receiving end diffuse reflection plate 13; the reflector angle rotating device 14 is used for adjusting the rotation angle of the receiving-end diffuse reflection plate 13, and the measuring range of the bridge deflection measuring device is adjusted through the change of the angle, so that after the distance between the auto-collimation laser unit 2 and the auxiliary target unit 1 is changed, the infrared laser emitted by the auto-collimation laser unit 2 can always irradiate on the receiving-end diffuse reflection plate 3.
Further, the wireless receiving unit 4 comprises a receiving wireless antenna 41, a portable acquisition module 42 and a universal serial bus USB port 43.
The receiving wireless antenna 41 is connected to the portable acquisition module 42, and the receiving wireless antenna 41 is configured to receive the bridge flexibility value sent by the auto-collimation laser unit 2 and transmit the bridge flexibility value to the portable acquisition module 42; the portable acquisition module 42 is connected with the remote terminal 3 through a USB port 43, and the portable acquisition module 42 transmits the received bridge deflection value to the remote terminal.
Further, after receiving the bridge deflection value, the remote terminal 3 simulates a bridge deflection change curve through an upper computer, and the bridge deflection change curve is used for a tester to observe.
In a specific embodiment, before bridge deflection measurement, an auxiliary target unit is arranged at the bottom end of a bridge, and a self-collimating laser unit is arranged corresponding to the auxiliary target unit; the heights of the auto-collimation laser unit and the auxiliary target unit are adjusted through the first hoisting crane and the second hoisting crane, so that infrared laser emitted by the auto-collimation laser unit irradiates on the diffuse reflection plate at the receiving end of the auxiliary target unit.
After the bridge deflection measurement is started, a laser ranging transmitting module in an auto-collimation laser unit transmits infrared laser to an auxiliary target unit, and a laser ranging receiving module receives a reflected light signal which is reflected in the original direction by a target receiving unit; the MCU obtains a reflected time difference according to the reflected light signal, and calculates the horizontal distance between the auto-collimation laser unit and the auxiliary target unit according to the time difference; determining the deflection of the bridge by combining the inclination angle of a diffuse reflection plate at a receiving end in the auxiliary target unit according to the horizontal distance change before and after the deformation of the bridge; and outputting the bridge deflection to a wireless communication module.
The wireless communication module sends the bridge deflection value to a wireless receiving unit; and the wireless receiving unit transmits the bridge deflection value to a remote terminal for observing and recording the change of the bridge deflection.
The principles and embodiments of the present invention have been described herein using specific examples, which are provided only to help understand the method and the core concept of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, this description should not be taken as limiting the invention.
Claims (10)
1. A bridge deflection measuring device, characterized in that, the bridge deflection measuring device includes:
the auxiliary target unit is arranged at the bottom end of the bridge;
and the auto-collimation laser unit is connected with the remote terminal, corresponds to the auxiliary target unit, and is used for emitting infrared laser to the auxiliary target unit, receiving reflected light signals reflected by the auxiliary target unit, determining a bridge deflection value according to the reflected light signals, and sending the bridge deflection value to the remote terminal.
2. The bridge deflection measuring device of claim 1, wherein the self-collimating laser unit comprises:
the laser ranging transmitting module is used for transmitting infrared laser to the auxiliary target unit;
the laser ranging receiving module is used for receiving the reflected light signal reflected by the auxiliary target unit;
the micro control unit MCU is connected with the laser ranging receiving module and the remote terminal and is used for determining a bridge deflection value according to the reflected light signal and sending the bridge deflection value to the remote terminal;
the first shell is used for placing the laser ranging transmitting module, the laser ranging receiving module and the MCU;
the first hoisting crane is fixedly connected with the first shell and used for adjusting the height of the first shell through lifting, so that the heights of the laser ranging transmitting module and the laser ranging receiving module are matched with the height of the auxiliary target unit.
3. The bridge deflection measuring device of claim 2, wherein the self-collimating laser unit further comprises:
and the wireless communication module is arranged in the first shell, is respectively connected with the MCU and the remote terminal, and is used for transmitting the bridge flexibility value to the remote terminal.
4. The bridge deflection measuring device of claim 3, wherein the wireless communication module is a wireless antenna.
5. The bridge deflection measuring device of claim 1, wherein the auxiliary target unit comprises:
the receiving end diffuse reflection plate is used for reflecting the infrared laser emitted by the auto-collimation laser unit;
the second shell is used for placing the receiving end diffuse reflection plate;
and the second hoisting crane is fixedly connected with the second shell and used for adjusting the height of the second shell through lifting so that the height of the second shell is matched with the height of the auto-collimation laser unit.
6. The bridge deflection measuring device of claim 5, wherein the auxiliary target unit further comprises:
and the reflecting plate angle rotating device is fixedly connected with the receiving end diffuse reflection plate.
7. The bridge deflection measuring device according to claim 5, wherein an original reflection film is adhered to the surface of the receiving-end diffuse reflection plate, so that a reflected light signal returns along an original path of an optical path of the infrared laser emitted by the auto-collimation laser unit.
8. The bridge deflection measuring device according to claim 5, wherein the second housing includes a receiving groove and a transparent dust cover, the receiving groove and the dust cover form a receiving space, the receiving diffuse reflection plate is disposed in the receiving space, and the infrared laser emitted by the auto-collimation laser unit irradiates onto the receiving diffuse reflection plate through the dust cover.
9. A bridge deflection measuring device according to claim 5, wherein the interior of said second housing is black in color.
10. The bridge deflection measuring device of claim 1, further comprising:
the wireless receiving unit is used for receiving the bridge deflection value sent by the auto-collimation laser unit and transmitting the bridge deflection value to the remote terminal;
the wireless receiving unit comprises a receiving wireless antenna, a portable acquisition module and a Universal Serial Bus (USB) port;
the receiving wireless antenna is connected with the portable acquisition module and is used for receiving the bridge deflection value sent by the auto-collimation laser unit and transmitting the bridge deflection value to the portable acquisition module;
the portable acquisition module is connected with the remote terminal through a USB port, and the portable acquisition module transmits the received bridge deflection value to the remote terminal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011202414.4A CN112097668A (en) | 2020-11-02 | 2020-11-02 | Bridge deflection measuring device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011202414.4A CN112097668A (en) | 2020-11-02 | 2020-11-02 | Bridge deflection measuring device |
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| CN112097668A true CN112097668A (en) | 2020-12-18 |
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| CN202011202414.4A Pending CN112097668A (en) | 2020-11-02 | 2020-11-02 | Bridge deflection measuring device |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113251940A (en) * | 2021-06-15 | 2021-08-13 | 湖南东润智能仪表有限公司 | Bridge structure deflection measuring device |
| CN113776447A (en) * | 2021-08-16 | 2021-12-10 | 武汉工程大学 | Method and system for calculating deflection obtaining and transverse distribution influence lines based on three-dimensional scanning |
| CN114413785A (en) * | 2021-12-28 | 2022-04-29 | 东南大学 | Bridge space form three-dimensional laser scanning's arrangement formula auxiliary mark area group |
| CN114485412A (en) * | 2021-12-13 | 2022-05-13 | 佛山市公路桥梁工程监测站有限公司 | Bridge deflection measuring device and control method |
| CN114858203A (en) * | 2021-01-20 | 2022-08-05 | 白康 | Road and bridge safety monitoring device |
-
2020
- 2020-11-02 CN CN202011202414.4A patent/CN112097668A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114858203A (en) * | 2021-01-20 | 2022-08-05 | 白康 | Road and bridge safety monitoring device |
| CN113251940A (en) * | 2021-06-15 | 2021-08-13 | 湖南东润智能仪表有限公司 | Bridge structure deflection measuring device |
| CN113776447A (en) * | 2021-08-16 | 2021-12-10 | 武汉工程大学 | Method and system for calculating deflection obtaining and transverse distribution influence lines based on three-dimensional scanning |
| CN114485412A (en) * | 2021-12-13 | 2022-05-13 | 佛山市公路桥梁工程监测站有限公司 | Bridge deflection measuring device and control method |
| CN114485412B (en) * | 2021-12-13 | 2024-02-20 | 佛山市公路桥梁工程监测站有限公司 | Bridge deflection measuring device and control method |
| CN114413785A (en) * | 2021-12-28 | 2022-04-29 | 东南大学 | Bridge space form three-dimensional laser scanning's arrangement formula auxiliary mark area group |
| CN114413785B (en) * | 2021-12-28 | 2024-03-19 | 东南大学 | Bridge space morphology three-dimensional laser scanning's placement type auxiliary marking band group |
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