CN113514110A - Road and bridge engineering intelligent measurement system - Google Patents
Road and bridge engineering intelligent measurement system Download PDFInfo
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- CN113514110A CN113514110A CN202110952136.2A CN202110952136A CN113514110A CN 113514110 A CN113514110 A CN 113514110A CN 202110952136 A CN202110952136 A CN 202110952136A CN 113514110 A CN113514110 A CN 113514110A
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Abstract
The invention discloses an intelligent measuring system for road and bridge engineering, which relates to the technical field of bridge measurement and comprises a data acquisition module, a safety monitoring module, a compression resistance measuring module and a speed limit analysis module; the data acquisition module is used for acquiring contact parameter information of the bridge; the safety monitoring module is used for analyzing and processing the contact parameter information and judging whether the bridge is abnormal or not, so that the monitoring of the three-dimensional displacement of the bridge with high precision is realized, the health condition of the bridge is accurately known, and the occurrence rate of bridge accidents is reduced; the compression resistance measuring module is used for dynamically detecting and analyzing the compression resistance of the bridge, can quickly detect crack points through the ultrasonic detector and quickly judge whether the bridge can be continuously and safely used or not, and is high in monitoring speed and accurate in data; the speed limit analysis module is used for analyzing the speed limit interval of the bridge according to the crack detection result and the corresponding rotating speed, so that the service quality and the service life of the bridge are effectively improved.
Description
Technical Field
The invention relates to the technical field of bridge measurement, in particular to an intelligent measurement system for road and bridge engineering.
Background
Bridges are important components in modern ground traffic as buildings spanning large obstacles, rivers and ravines. Along with the increase of traffic demand and the promotion of construction technology, the length of bridge is constantly increased, and the model is constantly innovated. Meanwhile, the number, load and speed of passing vehicles are greatly changed, and the dynamic response of the bridge is increased.
Along with the increasing traffic volume, the operation time of the bridge is prolonged, the number of overloaded vehicles is increased, the bridge can be damaged to different degrees to generate potential safety hazards, and a large number of highway bridge structures are overloaded to cause various diseases. Therefore, the technical condition of the existing bridge is scientifically and reasonably evaluated, effective maintenance and reinforcement measures are further taken, the improvement of the service quality and the service life of the bridge is of great importance, meanwhile, in order to ensure the safe operation of the bridge, deformation monitoring needs to be carried out on the bridge, potential hidden dangers are discovered as soon as possible, and unnecessary loss is avoided.
Disclosure of Invention
In order to solve the problems existing in the scheme, the invention provides an intelligent measuring system for road and bridge engineering.
The purpose of the invention can be realized by the following technical scheme:
an intelligent measuring system for road and bridge engineering comprises a data acquisition module, a safety monitoring module, a controller, a compression resistance measuring module and a speed limit analysis module;
a data acquisition module: the system comprises a safety monitoring module, a bridge contact parameter acquisition module and a bridge contact parameter acquisition module, wherein the safety monitoring module is used for acquiring contact parameter information of the bridge and transmitting the contact parameter information to the safety monitoring module;
the safety monitoring module: the system is used for analyzing and processing the contact parameter information and judging whether the bridge is abnormal or not; if the abnormality occurs, generating an early warning signal;
a controller: the bridge contact parameter information acquisition module is used for receiving the early warning signal and then controlling the alarm to send out an alarm and transmitting the contact parameter information of the bridge to the display module for real-time display;
a compression resistance measurement module: the device comprises a hydraulic cylinder, a connecting shaft, tires, an ultrasonic probe and a driving motor which is in transmission connection with the connecting shaft through a built-in gear and is used for dynamically detecting and analyzing the compression resistance of the bridge; wherein, a piston of the hydraulic cylinder is connected with a connecting shaft, and tires are arranged on two sides of the connecting shaft;
the compression resistance measuring module also comprises a rotating speed sensor arranged on the connecting shaft and used for detecting the rotating speed of the connecting shaft in real time; and the speed limit analysis module is connected with the compression resistance measurement module and is used for analyzing the speed limit interval of the bridge according to the crack detection result and the corresponding rotating speed.
Further, the specific detection and analysis process of the compression resistance measurement module comprises the following steps:
equally dividing the bottom surface of the bridge into n areas; starting a driving motor to drive a connecting shaft to rotate, and driving tires on two sides to synchronously rotate by the connecting shaft;
the controller controls the piston of the hydraulic cylinder to extend out, and pushes the connecting shaft to move downwards until the output pressure of the hydraulic cylinder reaches a preset standard pressure value, and at the moment, the bottom surface of the tire is in contact with the surface of the bridge;
carrying out crack detection on the bottom surface of the bridge through an ultrasonic probe; and dynamically analyzing the compression resistance of the bridge according to the crack detection result.
Further, the dynamic analysis is carried out on the compression resistance of the bridge according to the crack detection result, and specifically comprises the following steps:
marking the bottom surface area of the bridge with cracks as Bv, and counting the number of the Bv areas;
acquiring a pressure value corresponding to the crack of the area Bv, and marking the pressure value as Ybv; calculating the difference value between Ybv and the standard pressure value to obtain the pressure resistance difference value;
evaluating the compression resistance difference coefficient of the bottom surface of the bridge according to the quantity ratio and the compression resistance difference value of the regions Bv; and if the compression difference coefficient is larger than or equal to the preset threshold value, judging that the compression resistance of the bottom surface of the bridge does not meet the use standard, generating an unqualified compression resistance signal and transmitting the unqualified compression resistance signal to the controller.
Further, the controller receives the unqualified pressure resistance signal and then sends the corresponding coordinates of the area Bv and the pressure difference resistance coefficient to the display module and the storage module, and controls the alarm module to give an alarm to prompt a manager to take effective maintenance and reinforcement measures for the area Bv.
Further, the specific analysis steps of the speed limit analysis module are as follows:
v1: acquiring an area Bv through a storage module, marking the rotating speed of a connecting shaft as Zv when the area Bv has cracks, and obtaining a crack speed interval;
v2: taking a rotating speed in a crack speed interval as a central speed ZX, and counting the number of the cracks appearing in a region with a radius r1 as Lg;
calculating the speed difference between the rotating speed when the crack appears and the central speed to obtain a rotating speed interval Gi; evaluating the crack coefficient corresponding to the central speed ZX according to the crack quantity Lg and the rotating speed interval Gi;
v3: if the crack coefficient is larger than or equal to a preset crack coefficient threshold value, marking a speed interval corresponding to the central speed ZX as a high-risk interval; the compression-resistant measuring module is used for reasonably formulating the speed-limiting interval of the bridge according to the high-risk interval and sending the formulated speed-limiting interval to the display module and the storage module.
Further, the data acquisition module comprises sensor groups arranged at a bridge girder, a bridge pier, a bridge tower and a foundation; the sensor group comprises a temperature sensor, an acceleration sensor, a displacement sensor, a deflection sensor and a vibration sensor; the contact parameter information comprises temperature, acceleration, displacement, deflection and vibration information of the bridge.
Further, the specific analysis processing steps of the safety monitoring module are as follows:
the method comprises the following steps: acquiring contact parameter information of the bridge in real time, acquiring corresponding temperature, acceleration, displacement and deflection in the contact parameter information, and comparing each parameter information with a standard range of a corresponding parameter;
if the standard range of the corresponding parameter is exceeded, generating an early warning signal;
step two: sensing vibration information of the bridge in real time through a vibration sensor, if the vibration information is out of a legal threshold range, creating a vibration element queue in a safety monitoring module, continuously acquiring the vibration information and storing the vibration information into the vibration element queue;
step three: and obtaining elements in the vibration element queue, and judging that the bridge vibrates abnormally at the moment if the number of the elements outside the legal threshold range reaches a preset first threshold or reaches a preset proportion within a preset time interval, so as to generate an early warning signal.
Further, the vibration sensor is an optical fiber vibration sensor, and the specific working steps are as follows:
connecting two optical fiber jumpers connected with sensing optical fibers on the optical fiber vibration sensor to a transmission optical cable, and connecting the transmission optical cable with an optical fiber demodulator; demodulating backward Rayleigh scattering intensity variable quantity in the optical fiber caused by vibration by adopting an interference type optical time domain reflection technology, and transmitting the backward Rayleigh scattering intensity variable quantity back to the safety monitoring module; the safety monitoring module performs Fourier change on the scattered light intensity information, converts the scattered light intensity information into time domain information, and automatically outputs the vibration frequency after analyzing the time domain information.
Compared with the prior art, the invention has the beneficial effects that:
1. the safety monitoring module is used for analyzing and processing the contact parameter information and judging whether the bridge is abnormal or not; the monitoring of the three-dimensional displacement of the bridge with high precision is realized, the health condition of the bridge is accurately known, and the incidence rate of bridge accidents is reduced;
2. the compression-resistant measuring module is used for dynamically detecting and analyzing the compression resistance of the bridge, loads with different sizes are applied to the bridge, the real stress of the bridge in the automobile driving state is simulated, crack points can be rapidly detected through the ultrasonic detector, whether the bridge can be continuously and safely used or not can be rapidly judged, the monitoring speed is high, data is accurate, and the bridge fracture condition caused by improper use or improper maintenance of the bridge in the past is greatly improved;
3. the speed limit analysis module is used for analyzing the speed limit interval of the bridge according to the crack detection result and the corresponding rotating speed to obtain a high-risk interval; the compression-resistant measuring module is used for reasonably formulating the speed-limiting interval of the bridge according to the high-risk interval, so that the service quality and the service life of the bridge are effectively improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic block diagram of the present invention.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood 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.
As shown in fig. 1, an intelligent measuring system for road and bridge engineering comprises a data acquisition module, a safety monitoring module, a controller, an alarm module, a display module, a compression resistance measuring module, a storage module and a speed limit analysis module;
the data acquisition module is used for acquiring contact parameter information of the bridge and transmitting the contact parameter information to the safety monitoring module, wherein the contact parameter information comprises temperature, acceleration, displacement, deflection and vibration information of the bridge; the data acquisition module comprises sensor groups arranged at a bridge girder, a bridge pier, a bridge tower and a foundation; the sensor group comprises a temperature sensor, an acceleration sensor, a displacement sensor, a deflection sensor and a vibration sensor;
the safety monitoring module is used for analyzing and processing the contact parameter information and judging whether the bridge is abnormal or not; the specific analysis and treatment steps are as follows:
the method comprises the following steps: acquiring contact parameter information of the bridge in real time, acquiring corresponding temperature, acceleration, displacement and deflection in the contact parameter information, and comparing each parameter information with a standard range of a corresponding parameter;
if the standard range of the corresponding parameter is exceeded, generating an early warning signal;
step two: through the vibration information of the real-time response bridge of vibration sensor, vibration information includes vibration frequency, and wherein vibration sensor is optic fibre vibration sensor, specifically is:
connecting two optical fiber jumpers connected with sensing optical fibers on the optical fiber vibration sensor to a transmission optical cable, and connecting the transmission optical cable with an optical fiber demodulator; demodulating backward Rayleigh scattering intensity variable quantity in the optical fiber caused by vibration by adopting an interference type optical time domain reflection technology, and transmitting the backward Rayleigh scattering intensity variable quantity back to the safety monitoring module; the safety monitoring module performs Fourier change on the scattered light intensity information, converts the scattered light intensity information into time domain information, and automatically outputs vibration frequency after analyzing the time domain information; the optical fiber vibration sensor can effectively measure the vibration of the bridge in the vertical and transverse directions, and avoids the damage of the sensing optical fiber when the amplitude of the large-span bridge is large, so that the safety monitoring module fails;
if the vibration information is out of the legal threshold range, a vibration element queue is created in the safety monitoring module so as to continuously acquire the vibration information and store the vibration information into the vibration element queue;
step three: acquiring elements in a vibration element queue, and judging that the bridge vibrates abnormally at the moment if the number of the elements outside a legal threshold range reaches a preset first threshold or reaches a preset proportion within a preset time interval, and generating an early warning signal;
the safety monitoring module is used for transmitting the contact parameter information and the early warning signal of the bridge to the controller, the controller controls the alarm to give an alarm after receiving the early warning signal, and the contact parameter information of the bridge is transmitted to the display module to be displayed in real time;
according to the invention, the contact parameter information of the bridge is monitored in real time, so that the monitoring of the three-dimensional displacement of the bridge with high precision is realized, the health condition of the bridge is accurately known, and the occurrence rate of bridge accidents is reduced;
the compression resistance measuring module is used for dynamically detecting and analyzing the compression resistance of the bridge; the compression-resistant measuring module comprises a hydraulic cylinder, a connecting shaft, tires, an ultrasonic probe and a driving motor in transmission connection with the connecting shaft through a built-in gear; a piston of the hydraulic cylinder is connected with a connecting shaft, and tires are arranged on two sides of the connecting shaft; the specific detection analysis process comprises the following steps:
s1: equally dividing the bottom surface of the bridge into n regions, wherein n =1, … …, u, setting a plane coordinate system according to the bottom surface of the bridge, marking the coordinates of the n regions as (Xn, Yn), acquiring pressure values of the n regions during dynamic compression detection, and marking the pressure values of the n regions as Yn;
s2: starting a driving motor to drive a connecting shaft to rotate, driving tires on two sides to synchronously rotate by the connecting shaft, sleeving a belt on the lateral circumferential surface of the bridge, and driving the belt to run by utilizing the friction force between the surface of the tire and the surface of the belt when the tires rotate, so that the bottom surface of the bridge is in a static state relative to the tires while the tires rotate at a high speed;
s3: acquiring a standard pressure value through a storage module; then the controller controls the piston of the hydraulic cylinder to extend out, and pushes the connecting shaft to move downwards until the bottom surface of the tire is contacted with the surface of the bridge;
then controlling the output pressure of the hydraulic cylinder to reach a preset standard pressure value, and carrying out crack detection on the bottom surface of the bridge through an ultrasonic probe;
s4: dynamically analyzing the compression resistance of the bridge according to the crack detection result; the method specifically comprises the following steps:
s41: marking the bridge bottom surface area with cracks as Bv, counting the number of the areas Bv, and obtaining the number ratio Bz of the areas Bv; the number ratio Bz is the ratio of the number of the areas Bv to n;
s42: acquiring a pressure value corresponding to the crack of the area Bv, and marking the pressure value as Ybv; calculating the difference value between Ybv and the standard pressure value to obtain a compression resistance difference value C1;
setting a plurality of compression difference resisting coefficients and marking as Kc; c =1, 2, …, w; k1 is more than K2 is more than … is more than Kw; each compression resistance difference coefficient Kc corresponds to a preset compression resistance difference range and is respectively (k 1, k 2), (k 2, k 3) and (…), (kw, kw + 1), wherein k1 is more than k2 is more than … and is more than kw + 1;
when C1 belongs to (Kw, Kw + 1), the pressure difference resistance coefficient corresponding to the preset pressure difference resistance range is Kw;
obtaining an influence value C2 corresponding to the compression resistance difference value by using a formula C2= C1 multiplied by Kw; summing the influence values corresponding to all the pressure-resistant difference values to obtain a total pressure-resistant difference influence value, and marking as C3;
s43: obtaining a pressure difference resistance coefficient C4 by using a formula C4= Bz × a1+ C3 × a 2; wherein a1 and a2 are proportionality coefficients;
comparing the pressure difference resistance coefficient C4 with a preset threshold value;
if C4 is less than a preset threshold value, judging that the compression resistance of the bottom surface of the bridge meets the use standard;
if the C4 is not less than the preset threshold value, judging that the compression resistance of the bottom surface of the bridge does not meet the use standard, and sending an unqualified compression resistance signal to the controller by the compression resistance measuring module; after receiving the unqualified pressure resistance signal, the controller sends the corresponding coordinates and the pressure difference resistance coefficient of the area Bv to the display module and the storage module, controls the alarm module to give an alarm and prompts a manager to take effective maintenance and reinforcement measures on the area Bv;
according to the invention, the compression-resistant measuring module applies different loads to the bridge as required to simulate the real stress of the bridge in the automobile driving state, the ultrasonic detector can quickly detect crack points and quickly judge whether the bridge can be continuously and safely used or not, the monitoring speed is high, the data is accurate, and the bridge fracture condition caused by improper use or improper maintenance of the bridge in the past is greatly improved;
the compression resistance measuring module also comprises a rotating speed sensor arranged on the connecting shaft, and the rotating speed sensor is used for detecting the rotating speed of the connecting shaft in real time;
the speed limit analysis module is connected with the compression resistance measurement module and used for analyzing the speed limit interval of the bridge according to the crack detection result and the corresponding rotating speed, and the specific analysis steps are as follows:
v1: acquiring an area Bv through a storage module, marking the rotating speed of a connecting shaft as Zv when the area Bv has cracks, wherein the Bv corresponds to the Zv one by one, and arranging the Zv in sequence from small to large to obtain a crack speed interval;
v2: taking a rotating speed in a crack speed interval as a central speed ZX, and counting the number of the cracks appearing in a region with a radius r1 as Lg;
calculating the speed difference between the rotating speed when the crack occurs and the central speed to obtain a rotating speed interval, and marking the rotating speed interval as Gi to obtain a rotating speed interval information group, wherein i =1, 2, … and Lg;
obtaining the standard deviation mu of the rotating speed interval information group according to a standard deviation calculation formula;
calculating a crack coefficient SY corresponding to the central speed ZX by using a formula SY = (Lg × b1)/(μ × b 2); wherein b1 and b2 are coefficient factors;
v3: acquiring a preset crack coefficient threshold value through a storage module, and comparing the crack coefficient SY with the preset crack coefficient threshold value;
if the crack coefficient SY is larger than or equal to a preset crack coefficient threshold value, marking a speed interval corresponding to the central speed ZX as a high-risk interval; wherein the speed interval corresponding to the central speed ZX is [ ZX-mu, ZX + mu ];
the anti-compression measuring module is used for reasonably formulating the speed-limiting interval of the bridge according to the high-risk interval and sending the formulated speed-limiting interval to the display module and the storage module, so that the service quality and the service life of the bridge are effectively improved.
The above formulas are all calculated by removing dimensions and taking numerical values thereof, the formula is a formula which is obtained by acquiring a large amount of data and performing software simulation to obtain the closest real situation, and the preset parameters and the preset threshold value in the formula are set by the technical personnel in the field according to the actual situation or obtained by simulating a large amount of data.
The working principle of the invention is as follows:
when the intelligent measuring system works, the data acquisition module is used for acquiring contact parameter information of a bridge and transmitting the contact parameter information to the safety monitoring module, and the safety monitoring module is used for analyzing and processing the contact parameter information and judging whether the bridge is abnormal or not; firstly, acquiring corresponding temperature, acceleration, displacement and deflection in contact parameter information, and comparing each parameter information with a standard range of a corresponding parameter; if the standard range of the corresponding parameter is exceeded, generating an early warning signal; then, sensing vibration information of the bridge in real time through a vibration sensor, if the vibration information is out of a legal threshold range, creating a vibration element queue in a safety monitoring module, and if the number of elements out of the legal threshold range reaches a preset first threshold or reaches a preset proportion within a preset time interval, generating an early warning signal; according to the invention, the contact parameter information of the bridge is monitored in real time, so that the monitoring of the three-dimensional displacement of the bridge with high precision is realized, the health condition of the bridge is accurately known, and the occurrence rate of bridge accidents is reduced;
the compression resistance measuring module is used for dynamically detecting and analyzing the compression resistance of the bridge, equally dividing the bottom surface of the bridge into n regions, starting the driving motor to drive the connecting shaft to rotate, driving the tires on two sides to synchronously rotate by the connecting shaft, then controlling the output pressure of the hydraulic cylinder to reach a preset standard pressure value, and detecting cracks on the bottom surface of the bridge through the ultrasonic probe; dynamically analyzing the compression resistance of the bridge according to the crack detection result, and prompting managers to take effective maintenance and reinforcement measures for the area Bv; according to the invention, the compression-resistant measuring module applies different loads to the bridge as required to simulate the real stress of the bridge in the automobile driving state, the ultrasonic detector can quickly detect crack points and quickly judge whether the bridge can be continuously and safely used or not, the monitoring speed is high, the data is accurate, and the bridge fracture condition caused by improper use or improper maintenance of the bridge in the past is greatly improved;
the speed limit analysis module is used for analyzing the speed limit interval of the bridge according to the crack detection result and the corresponding rotating speed, marking the rotating speed of the connecting shaft as Zv when the crack occurs in the area Bv, and obtaining a crack speed interval; then, taking a rotating speed in the crack speed interval as a central speed ZX, counting the number of cracks appearing in the area with the radius r1 and the corresponding rotating speed interval, and calculating to obtain a crack coefficient SY corresponding to the central speed ZX; if the crack coefficient SY is larger than or equal to a preset crack coefficient threshold value, marking a speed interval corresponding to the central speed ZX as a high-risk interval; the compression-resistant measuring module is used for reasonably formulating the speed-limiting interval of the bridge according to the high-risk interval, so that the service quality and the service life of the bridge are effectively improved.
In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise forms disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.
Claims (8)
1. The utility model provides a road and bridge engineering intelligence measurement system which characterized in that includes:
a data acquisition module: the system comprises a safety monitoring module, a bridge contact parameter acquisition module and a bridge contact parameter acquisition module, wherein the safety monitoring module is used for acquiring contact parameter information of the bridge and transmitting the contact parameter information to the safety monitoring module;
the safety monitoring module: the system is used for analyzing and processing the contact parameter information and judging whether the bridge is abnormal or not; if the abnormality occurs, generating an early warning signal; a controller: the bridge contact parameter information acquisition module is used for receiving the early warning signal and then controlling the alarm to send out an alarm and transmitting the contact parameter information of the bridge to the display module for real-time display;
a compression resistance measurement module: the device comprises a hydraulic cylinder, a connecting shaft, tires, an ultrasonic probe and a driving motor which is in transmission connection with the connecting shaft through a built-in gear and is used for dynamically detecting and analyzing the compression resistance of the bridge;
the compression resistance measuring module also comprises a rotating speed sensor arranged on the connecting shaft and used for detecting the rotating speed of the connecting shaft in real time; and the speed limit analysis module is connected with the compression resistance measurement module and is used for analyzing the speed limit interval of the bridge according to the crack detection result and the corresponding rotating speed.
2. The system of claim 1, wherein the specific detection and analysis process of the compression-resistant measurement module comprises the following steps:
equally dividing the bottom surface of the bridge into n areas; wherein, a piston of the hydraulic cylinder is connected with a connecting shaft, and tires are arranged on two sides of the connecting shaft; starting a driving motor to drive a connecting shaft to rotate, and driving tires on two sides to synchronously rotate by the connecting shaft;
the controller controls the piston of the hydraulic cylinder to extend out, and pushes the connecting shaft to move downwards until the output pressure of the hydraulic cylinder reaches a preset standard pressure value, and at the moment, the bottom surface of the tire is in contact with the surface of the bridge; and carrying out crack detection on the bottom surface of the bridge through the ultrasonic probe, and carrying out dynamic analysis on the compression resistance of the bridge according to a crack detection result.
3. The road and bridge engineering intelligent measurement system of claim 2, wherein the dynamic analysis is performed on the compression resistance of the bridge according to the crack detection result, specifically:
marking the bottom surface area of the bridge with cracks as Bv, and counting the number of the Bv areas;
acquiring a pressure value corresponding to the crack of the area Bv, and marking the pressure value as Ybv; calculating the difference value between Ybv and the standard pressure value to obtain the pressure resistance difference value;
evaluating the compression resistance difference coefficient of the bottom surface of the bridge according to the quantity ratio and the compression resistance difference value of the regions Bv; and if the compression difference coefficient is larger than or equal to the preset threshold value, judging that the compression resistance of the bottom surface of the bridge does not meet the use standard, generating an unqualified compression resistance signal and transmitting the unqualified compression resistance signal to the controller.
4. The system of claim 3, wherein the controller sends the corresponding coordinates and the pressure difference resistance coefficient of the area Bv to the display module and the storage module after receiving the pressure failure signal, and controls the alarm module to give an alarm to prompt a manager to take effective maintenance and reinforcement measures for the area Bv.
5. The road and bridge engineering intelligent measurement system of claim 4, wherein the specific analysis steps of the speed limit analysis module are as follows:
v1: acquiring an area Bv through a storage module, marking the rotating speed of a connecting shaft as Zv when the area Bv has cracks, and obtaining a crack speed interval;
v2: taking a rotating speed in a crack speed interval as a central speed ZX, and counting the number of the cracks appearing in a region with a radius r1 as Lg;
calculating the speed difference between the rotating speed when the crack appears and the central speed to obtain a rotating speed interval Gi; evaluating the crack coefficient according to the crack quantity Lg and the rotating speed interval Gi;
v3: if the crack coefficient is larger than or equal to a preset crack coefficient threshold value, marking a speed interval corresponding to the central speed ZX as a high-risk interval; the compression-resistant measuring module is used for reasonably formulating the speed-limiting interval of the bridge according to the high-risk interval and sending the formulated speed-limiting interval to the display module and the storage module.
6. The road and bridge engineering intelligent measurement system of claim 1, wherein the data acquisition module comprises sensor groups arranged at a bridge girder, a bridge pier, a bridge tower and a foundation; the sensor group comprises a temperature sensor, an acceleration sensor, a displacement sensor, a deflection sensor and a vibration sensor; the contact parameter information comprises temperature, acceleration, displacement, deflection and vibration information of the bridge.
7. The road and bridge engineering intelligent measurement system of claim 1 or 6, wherein the specific analysis and processing steps of the safety monitoring module are as follows:
the method comprises the following steps: acquiring contact parameter information of the bridge in real time, acquiring corresponding temperature, acceleration, displacement and deflection in the contact parameter information, and comparing each parameter information with a standard range of a corresponding parameter;
if the standard range of the corresponding parameter is exceeded, generating an early warning signal;
step two: sensing vibration information of the bridge in real time through a vibration sensor, if the vibration information is out of a legal threshold range, creating a vibration element queue in a safety monitoring module, continuously acquiring the vibration information and storing the vibration information into the vibration element queue;
step three: in a preset time interval, if the number of elements outside a legal threshold range reaches a preset first threshold or reaches a preset proportion, judging that the bridge vibrates abnormally at the moment, and generating an early warning signal;
the safety monitoring module is used for sending the early warning signal to the controller.
8. The road and bridge engineering intelligent measurement system of claim 6, wherein the vibration sensor is an optical fiber vibration sensor, and the specific working steps are as follows:
connecting two optical fiber jumpers connected with sensing optical fibers on the optical fiber vibration sensor to a transmission optical cable, and connecting the transmission optical cable with an optical fiber demodulator; demodulating backward Rayleigh scattering intensity variable quantity in the optical fiber caused by vibration by adopting an interference type optical time domain reflection technology, and transmitting the backward Rayleigh scattering intensity variable quantity back to the safety monitoring module; the safety monitoring module performs Fourier change on the scattered light intensity information, converts the scattered light intensity information into time domain information, and automatically outputs the vibration frequency after analyzing the time domain information.
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| CN114777896A (en) * | 2022-04-20 | 2022-07-22 | 江西天丰建设集团有限公司 | Vibration monitoring device and monitoring system for bridge construction |
| CN114964456A (en) * | 2022-04-20 | 2022-08-30 | 中国矿业大学 | Beam bridge steel structure vibration safety monitoring system utilizing vehicle speed monitoring |
| CN116840356A (en) * | 2023-09-01 | 2023-10-03 | 南京安盛电子有限公司 | Monitoring method for cracks of encapsulated transformer |
| CN117213894A (en) * | 2023-11-08 | 2023-12-12 | 青岛船研深海技术有限公司 | Abnormal operation monitoring system for ocean engineering equipment |
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Application publication date: 20211019 |