CN213874871U - Night non-contact bridge deflection monitoring device - Google Patents
Night non-contact bridge deflection monitoring device Download PDFInfo
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- CN213874871U CN213874871U CN202120034151.4U CN202120034151U CN213874871U CN 213874871 U CN213874871 U CN 213874871U CN 202120034151 U CN202120034151 U CN 202120034151U CN 213874871 U CN213874871 U CN 213874871U
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Abstract
本实用新型公开了一种夜间非接触桥梁挠度监测装置，包括摄像设备、计算机和测距仪，所述摄像设备包括镜头和处理器，镜头的输出端与处理器电连接，处理器的输出端和测距仪的输出端均与计算机电连接；还包括用于标识桥梁上目标测点的反射片，所述反射片位于镜头的视场范围内；还包括用于照亮反射片的光源。本实用新型对目标测点捕捉效率高，特别是能够在光线较差环境或夜间环境精准捕捉到目标测点，数据准确度高，监测精度高，受外界干扰小，成本低，寿命长，适用范围广。
The utility model discloses a nighttime non-contact bridge deflection monitoring device, which comprises a camera device, a computer and a range finder. The camera device comprises a lens and a processor, an output end of the lens is electrically connected with the processor, and an output end of the processor Both the output end of the rangefinder and the rangefinder are electrically connected to the computer; it also includes a reflection sheet for identifying the target measuring point on the bridge, the reflection sheet is located in the field of view of the lens; and a light source for illuminating the reflection sheet. The utility model has high capture efficiency for the target measuring point, especially can accurately capture the target measuring point in a poor light environment or a nighttime environment, has high data accuracy, high monitoring accuracy, little external interference, low cost, long life, and is suitable for wide range.
Description
Technical Field
The utility model belongs to the technical field of bridge structures monitoring, in particular to non-contact bridge amount of deflection monitoring devices night.
Background
At present, the total number of highway bridges in China is more than 80 and the total number of railway bridges exceeds 20, wherein ancient bridges with long history like Zhao state bridges are reserved, and new roads and railway bridges with refreshed world records are continuously built. For the aspects of bridge detection, dangerous bridge transformation, new bridge acceptance and use stages and the like, the deflection of the bridge is used as one of key parameters for evaluating the quality of the bridge, the health of the bridge is greatly influenced, the measurement of the deflection is essential in bridge parameter monitoring, and the safety risk of the bridge can be evaluated by monitoring the change of the deflection.
At present, the testing methods which are applied to bridge deflection monitoring include a dial indicator method, a communicating tube method, a total station method, a GPS method, a photoelectric imaging method and the like.
The dial indicator method is characterized in that a side rod slightly moves linearly due to a measured point, and the side rod is amplified through rotation of a gear to become a pointer which rotates on a dial of the dial indicator. The dial indicator method is convenient to install and use, consumes a large amount of manpower, takes time to observe readings, cannot automatically record, and is only suitable for bridges under which supports can be erected.
The communicating tube method is characterized in that a container with a relatively large area is placed at a position where a pier is fixed, a communicating tube is fixed on the side wall of a bridge body, and the deflection value of a target measuring point is determined by monitoring the liquid level change in the communicating tube. The connecting pipe method only depends on manual measurement, is time-consuming and labor-consuming, and is only suitable for short-term static deflection measurement of bridges.
The total station method is to directly observe the height difference between a measuring station and a target point by using a built-in triangulation height measurement program of the total station. The total station method is greatly limited by natural conditions.
The system applied by the GPS method is expensive, is greatly interfered by the outside, and has certain limitation on the application range.
The photoelectric imaging method is that a target is arranged at a bridge target measuring point, the target is imaged on a photosensitive surface of digital camera equipment, and the movement of the target is monitored, so that the deflection value of the bridge target measuring point is obtained. The photoelectric imaging method has the advantages of non-contact, long measuring distance, high measuring precision and the like, but along with the continuous popularization and use of the method, some problems in practical operation are exposed, and because the method cannot carry out measuring work at night, when the monitoring environment relates to an environment with poor light or an environment at night, the accuracy of monitoring data is low.
As described above, the existing bridge deflection monitoring device is not accurate enough for capturing a target, or is limited in use environment, and cannot complete a monitoring task in an environment with poor light or in a night environment, so that the real popularization and application of the device in monitoring the dynamic and static deflection or displacement of a bridge body, a bridge pier and a suspension cable are severely restricted.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a night non-contact bridge amount of deflection monitoring devices to above-mentioned prior art not enough, the target measurement station is caught efficiently, especially can be at the relatively poor environment of light or the accurate target measurement station that catches of night environment, and the data accuracy is high, and application scope is wide.
In order to solve the technical problem, the utility model discloses the technical scheme who adopts is:
a non-contact bridge deflection monitoring device at night comprises a camera device, a computer and a distance meter, wherein the camera device comprises a lens and a processor, the output end of the lens is electrically connected with the processor, and the output end of the processor and the output end of the distance meter are both electrically connected with the computer; the structure is characterized by further comprising a reflector plate used for marking a target measuring point on the bridge, wherein the reflector plate is located in the field range of the lens.
By means of the structure, the reflector plate is arranged at the target measuring point, the utilization rate of light can be improved through the reflector plate, accordingly, the target measuring point capturing efficiency in the monitoring process is greatly improved, the target measuring point can be captured in the environment with poor light, and the accuracy of monitoring data is improved.
Further, the light source is used for illuminating the reflecting sheet.
During night monitoring, a light source is used cooperatively to illuminate the reflector plate, so that a target measuring point can be accurately captured in night environment, and deflection monitoring is realized.
As a preferable mode, the reflector plate comprises a substrate layer, a plastic film layer, a metal coating and a protective layer which are sequentially arranged, wherein the reflector plate is arranged at a target measuring point on a bridge, the substrate layer is in contact with the target measuring point, and the protective layer is opposite to the lens.
The substrate layer is used for bearing whole reflector plate, and the plastics rete is used for improving metal coating's efficiency and yield, and metal coating is used for the reflection of light, and the protective layer is transparent material and plays the guard action to the reflector plate.
Further, still include first support, camera equipment and distancer all set firmly on this first support.
Furthermore, the LED lamp also comprises a second bracket, and the light source is fixedly arranged on the second bracket.
Preferably, the distance measuring instrument is an infrared distance measuring instrument.
Preferably, the light source is a strong light flashlight with light intensity greater than a set value k.
As a preferable mode, the image pickup apparatus is a moving displacement type image pickup apparatus.
Compared with the prior art, the utility model discloses it is efficient to target measurement station seizure, especially can be at the relatively poor environment of light or the accurate target measurement station that catches of night environment, the data accuracy is high, and monitoring accuracy is high, receives external disturbance little, and is with low costs, longe-lived, and application scope is wide.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present invention.
The system comprises a camera 1, a lens 101, a processor 102, an image acquisition module 1021, an image processing module 1022, a computer 2, a range finder 3, a reflector 4, a light source 5, a first support 6 and a second support 7.
Detailed Description
As shown in fig. 1, the night non-contact bridge deflection monitoring device comprises an image pickup device 1, a computer 2 and a distance meter 3, wherein the image pickup device 1 comprises a lens 101 and a processor 102, an output end of the lens 101 is electrically connected with the processor 102, and an output end of the processor 102 and an output end of the distance meter 3 are electrically connected with the computer 2; the bridge target detection system further comprises a reflector plate 4 used for marking a target detection point on the bridge, and the reflector plate 4 is located in the field range of the lens 101. Through set up reflector plate 4 at target measurement station department, reflector plate 4 can improve the utilization ratio of light to improve the target measurement station capture efficiency in the monitoring process greatly, can catch the target measurement station in the relatively poor environment of light, improved the monitoring data degree of accuracy. The reflecting sheet 4 has various specifications of 2cm x 2cm/4cm x 4cm/6cm x 6cm/10cm x 10cm/20cm x 20cm and the like, and can select proper size according to the distance between the actual monitoring position and the target measuring point on site, and can select other sizes under the condition of special requirements.
The reflector plate 4 with a proper size is pasted at the target measuring point of the measured bridge member, so that the aiming efficiency in the measuring process can be greatly improved, the reflector plate 4 is low in cost, convenient to arrange, durable and suitable for long-term arrangement, the measuring distance can reach 50% of the initial distance after ten years in a normal sun and rain environment, and the measuring distance hardly has a problem in a general measuring period.
The processor 102 is provided with an image capturing module 1021 and an image processing module 1022, and the lens 101, the image capturing module 1021, the image processing module 1022 and the computer 2 are electrically connected in sequence.
The lens 101 is used for capturing a corresponding target measuring point image at the reflector 4, and different monitoring precision requirements can be met by replacing the lens 101. When the deflection measurement is carried out on multiple measuring points at the same time, under the condition that all the points are within the measuring range of the lens 101, the accuracy of the lens 101 is preferably selected to be a large value.
The distance meter 3 is used for measuring the linear distance and the pitch angle between the image pickup apparatus 1 and the target measurement point, so that the true deflection value of the target measurement point can be calculated based on the obtained image.
The image capturing module 1021 is configured to extract pixel distribution information of a target measurement point from an image captured by the lens 101, and send the pixel distribution information to the image processing module 1022. The image processing module 1022 calculates the pixel distribution information of the target measuring point and sends the pixel distribution information to the computer 2, and the computer 2 combines the measurement information of the distance meter 3 to obtain the deflection monitoring data of the target measuring point.
The utility model discloses still include the light source 5 that is used for illuminating reflector plate 4. During night monitoring, the light source 5 is used cooperatively to illuminate the reflector plate 4 for supplementing light, so that a target measuring point can be accurately captured in night environment, and deflection monitoring is realized.
Preferably, the reflector plate 4 includes a substrate layer, a plastic film layer, a metal plating layer, and a protective layer, which are sequentially disposed. The substrate layer is located the bottommost, and a surface of plastics rete bonds on the substrate layer, has plated the metal coating on another surface of plastics rete, and the protective layer covers in the metal coating surface. The specific structure of the reflector 4 is not shown in the drawings, but does not affect the understanding and implementation of the present invention by those skilled in the art. The reflector plate 4 is arranged at a target measuring point on the bridge, the base material layer is in contact with the target measuring point, and the protective layer is opposite to the lens 101. The substrate layer is used for bearing whole reflector plate 4, and the plastics rete is used for improving metal coating's efficiency and yield, and metal coating is used for the reflection of light, and the protective layer is transparent material and plays the guard action to reflector plate 4. The reflecting sheet 4 may be an existing commercially available product.
The utility model discloses still include first support 6, camera equipment 1 and distancer 3 all set firmly on this first support 6. The first support 6 is a tripod for supporting the image pickup apparatus 1 and the distance meter 3 so as to be stable.
The utility model discloses still include second support 7, light source 5 sets firmly on this second support 7. The second support 7 is a tripod and is used for fixing the light source 5 and preventing shaking so as to provide a stable and reliable light source for a target measuring point.
Preferably, the image pickup apparatus 1 is a moving displacement type image pickup apparatus.
Preferably, the distance meter 3 is an infrared distance meter. The light source 5 is a strong light flashlight with light intensity greater than a set value k, and the brightness of the light intensity 5 is determined according to the distance, but generally can not be less than 1500 lumens. The flashlight is a strong light flashlight, and the emergent light intensity of the flashlight is selected according to the monitored environment.
The utility model discloses a monitoring principle as follows:
step one, paste reflector plate 4 in the target measurement station position department that needs monitoring amount of deflection, select firm and stable ground to erect monitoring device, when light was not good at night, lighted reflector plate 4 with light source 5.
Secondly, debugging the instrument, displaying the target measuring point in the measuring range of the lens 101, obtaining the linear distance L between the camera device 1 and the target measuring point and the pitch angle alpha between the camera device 1 and the horizontal plane by using the infrared distance meter 3, obtaining image information of the target measuring point by the lens 101, transmitting the image information to the image acquisition module 1021, extracting pixel distribution information of the target measuring point from the image information by the image acquisition module 1021, transmitting the pixel distribution information to the image processing module 1022, calculating the pixel distribution information of the target measuring point by the image processing module 1022 to obtain the pixel point position change condition of the measuring point on the plane at different moments, and subtracting the pixel point coordinate at the previous moment from the pixel point coordinate at the next moment to obtain the relative pixel point displacement h under load action.
Thirdly, the image processing module 1022 sends the image information to the computer 2 in the form of an electric signal, and the computer 2 combines the measurement information of the infrared distance meter 3 to display the deflection change curve of the target measuring point in real time through calculation.
The utility model discloses an improvement point only lies in improving the measuring environment of target measurement station in order to improve the monitoring accuracy, catches the image after, if handle it in order to obtain the amount of deflection monitoring result, all belong to prior art. The utility model discloses in, how through camera equipment 1 and infrared range finder 3 survey target measurement station image and positional information, computer 2 how calculates the amount of deflection and the output display of target measurement station according to image and positional information, all belongs to prior art, consequently, the utility model discloses do not relate to the improvement of procedure or method, belong to the protection object of utility model.
The embodiments of the present invention have been described with reference to the accompanying drawings, but the present invention is not limited to the above-mentioned embodiments, which are only illustrative and not restrictive, and those skilled in the art can make many forms without departing from the spirit and scope of the present invention, which is within the protection scope of the present invention.
Claims (8)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120034151.4U CN213874871U (en) | 2021-01-07 | 2021-01-07 | Night non-contact bridge deflection monitoring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120034151.4U CN213874871U (en) | 2021-01-07 | 2021-01-07 | Night non-contact bridge deflection monitoring device |
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| Publication Number | Publication Date |
|---|---|
| CN213874871U true CN213874871U (en) | 2021-08-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120034151.4U Expired - Fee Related CN213874871U (en) | 2021-01-07 | 2021-01-07 | Night non-contact bridge deflection monitoring device |
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| Country | Link |
|---|---|
| CN (1) | CN213874871U (en) |
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2021
- 2021-01-07 CN CN202120034151.4U patent/CN213874871U/en not_active Expired - Fee Related
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| GR01 | Patent grant | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210803 Termination date: 20220107 |
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| CF01 | Termination of patent right due to non-payment of annual fee |