CN115372042A - Method and system for detecting working performance of bridge expansion joint based on smart phone - Google Patents
Method and system for detecting working performance of bridge expansion joint based on smart phone Download PDFInfo
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Abstract
The embodiment of the specification provides a method and a system for detecting the working performance of a bridge expansion joint based on a smart phone, wherein the method comprises the following steps: when the vehicle runs at a constant speed at a normal running speed, acquiring the vibration acceleration and the running track of the vehicle passing through the expansion joint by the smart phone; obtaining the vibration acceleration response of the vehicle passing through each expansion joint position within a certain period of time according to the vibration acceleration and the running track; and evaluating the working performance of the bridge expansion joint by comparing the initial test data with the vibration acceleration response. The method aims to solve the problems of traffic safety risk, time waste and labor waste of the existing detection method.
Description
Technical Field
The document relates to the technical field of bridge engineering, in particular to a method and a system for detecting the working performance of a bridge expansion joint based on a smart phone.
Background
The expansion joint is an important component of a highway bridge, and has the main function of ensuring that the bridge has a free expansion function under the action of traffic flow, temperature change, concrete contraction, creep and the like. Meanwhile, the expansion joint is a key weak link of the bridge, and is easy to damage and destroy under the repeated action of vehicle load. On one hand, damage and damage of the expansion joint can cause obvious driving vibration, not only influence driving comfort, but also aggravate the impact effect of a vehicle on the expansion joint, so that the expansion joint is easy to damage; on the other hand, the free deformability of the bridge after a telescopic failure may be limited, which directly affects the operational safety of the bridge.
At present, the detection and maintenance cost of the expansion joint caused by the damage of the expansion joint can even reach 20 percent of the total maintenance cost of the bridge every year, so the detection of the expansion joint of the bridge needs to be paid sufficient attention. The special detection of the conventional expansion joint mainly depends on manual appearance detection to judge the working performance of the expansion joint, which is highly dependent on the specialty of detection personnel, and even manual observation cannot be carried out in partial areas; in addition, the detection method has traffic safety risk, is time-consuming and labor-consuming, and needs to be improved urgently. In addition, a method for specially detecting the working performance of the expansion joint is also provided, the brief process is that a sensor is arranged at the position of the expansion joint of the bridge, when a test heavy vehicle drives across the expansion joint of the bridge at different speeds, the sensor records a dynamic response time curve of the expansion joint to obtain vibration frequency and vibration acceleration response amplitude, and therefore the health state of the expansion joint is evaluated.
Disclosure of Invention
One or more embodiments of the present specification provide a method for detecting a working performance of a bridge expansion joint based on a smart phone, including:
s1, collecting vibration acceleration and a driving track of a vehicle passing through an expansion joint through a smart phone when the vehicle is driven at a constant speed at a normal driving speed;
s2, obtaining the vibration acceleration response of the vehicle passing through each expansion joint within a certain period of time according to the vibration acceleration and the driving track;
and S3, evaluating the working performance of the bridge expansion joint by comparing the initial test data with the vibration acceleration response.
One or more embodiments of this specification provide a bridge expansion joint working property detecting system based on smart mobile phone, include:
a data acquisition module: the intelligent mobile phone is used for collecting the vibration acceleration and the running track of the vehicle passing through the expansion joint when the vehicle runs at a constant speed at a normal running speed;
a data processing module: the system is used for obtaining the vibration acceleration response of the vehicle passing through each expansion joint position within a certain period of time according to the vibration acceleration and the running track;
a performance evaluation module: and the initial test data is used for comparing the initial test data with the vibration acceleration response to evaluate the working performance of the bridge expansion joint.
By adopting the embodiment of the invention, the rapid detection and evaluation of the working performance of the expansion joint of the road network group bridge can be realized, the method has the quantitative analysis capability of the traditional expansion joint dynamic load test result, and the measurement is carried out in a vehicle-mounted smart phone manner, so that the mobility is increased; the intelligent mobile phone positioning device can generate vehicle track information to match the position of the expansion joint, a large amount of personnel are not needed to settle and carry and transfer devices such as sensors and acquisition instruments, a large-area lane is not needed to be sealed, manpower is saved, life safety is guaranteed, and detection time is greatly shortened due to mobility.
The foregoing description is only an overview of the technical solutions of the present invention, and the embodiments of the present invention are described below in order to make the technical means of the present invention more clearly understood and to make the above and other objects, features, and advantages of the present invention more clearly understandable.
Drawings
In order to more clearly illustrate one or more embodiments or prior art solutions of the present specification, the drawings used in the description of the embodiments or prior art will be briefly described below, it is obvious that the drawings in the description below are only some embodiments described in the present specification, and that other drawings may be obtained by those skilled in the art without inventive labor.
Fig. 1 is a flowchart of a method for detecting a working performance of a bridge expansion joint based on a smart phone according to one or more embodiments of the present disclosure;
FIG. 2 is a diagram showing a phenomenon of "jumping" in which a vertical vibration acceleration is recorded by a smart phone when a vehicle passes through an expansion joint position;
fig. 3 is a schematic composition diagram of a system for detecting the working performance of a bridge expansion joint based on a smart phone according to one or more embodiments of the present disclosure.
Detailed Description
In order to make those skilled in the art better understand the technical solutions in one or more embodiments of the present disclosure, the technical solutions in one or more embodiments of the present disclosure will be clearly and completely described below with reference to the drawings in one or more embodiments of the present disclosure, and it is obvious that the described embodiments are only a part of the embodiments of the present disclosure, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from one or more of the embodiments described herein without making any inventive step, shall fall within the scope of protection of this document.
Method embodiment
According to an embodiment of the present invention, a method for detecting a working performance of a bridge expansion joint based on a smart phone is provided, and fig. 1 is a flowchart of a method for detecting a working performance of a bridge expansion joint based on a smart phone provided in one or more embodiments of the present specification, as shown in fig. 1, the method for detecting a working performance of a bridge expansion joint based on a smart phone according to an embodiment of the present invention specifically includes:
s1, when the vehicle runs at a constant speed at a normal running speed, collecting vibration acceleration and a running track of the vehicle passing through an expansion joint through a smart phone.
Installing a smart phone for data acquisition at a certain fixed position in a vehicle, namely an interior, starting a vibration acceleration acquisition function and a running track recording function of the smart phone, and keeping the vehicle running at a constant speed according to a normal running speed to pass through a bridge group detected by a road network;
testing vertical vibration acceleration by calling an accelerometer in a core motion frame of the smart phone, firstly correcting the influence of mobile phone inclination by a mobile phone gyroscope, collecting acceleration vibration signals in X, Y and Z directions, and recording vertical acceleration vibration data;
acquiring longitude and latitude information by calling a smartphone positioning system, and recording a track according to the longitude and latitude information: starting a positioning function of the smart phone, providing three-dimensional positioning of the vehicle in a specified coordinate system in real time by depending on a GPS satellite, and recording longitude and latitude coordinates of the vehicle path at corresponding time points; calculating the distance between each time point and the starting time according to the longitude and latitude coordinates; and finally determining the travel track of the vehicle time course according to the distance.
And S2, obtaining the vibration acceleration response of the vehicle passing through each expansion joint within a certain period of time according to the vibration acceleration and the running track.
And determining the position of the expansion joint, and combining the determined vehicle running track and the collected vertical vibration acceleration data according to the length of the bridge and the position of the expansion joint to obtain the vibration acceleration response of the vehicle passing through each expansion joint at a certain time interval.
The specific method for determining the position of the expansion joint comprises the following steps: the vibration acceleration acquisition and the driving track recording of the smart phone are based on the same time coordinate, when a vehicle passes through the expansion joint, the phenomenon of vehicle jumping can occur, which is represented as a sudden amplitude value of acceleration response, and as shown in fig. 2, the position of the expansion joint can be determined by comparing with the recorded driving track.
And S3, evaluating the working performance of the bridge expansion joint by comparing the initial test data with the vibration acceleration response. Specifically, the method comprises the following steps:
the vibration acceleration response of a vehicle passing through each expansion joint position in a certain period of time obtained by the first test is used as initial test data, the same working condition detection is carried out every 3-6 months, the average value of the absolute values of the five peak values before the acceleration of each expansion joint position is used as comparison, and the working performance of the bridge expansion joint is evaluated based on the change of the average value;
if the integral variation range of the statistical absolute value is less than 5%, the working performance of the telescopic seam is good, and if the integral variation range of the statistical absolute value is more than 5%, the working performance of the telescopic seam is reduced.
By adopting the embodiment of the invention, the rapid detection and evaluation of the working performance of the expansion joint of the road network group bridge can be realized, the method has the quantitative analysis capability of the traditional expansion joint dynamic load test result, and the measurement is carried out in a vehicle-mounted smart phone mode, so that the mobility is increased; the intelligent mobile phone positioning device can generate vehicle track information to match the position of the expansion joint, a large amount of personnel are not needed to settle and carry and transfer devices such as sensors and acquisition instruments, a large-area lane is not needed to be sealed, manpower is saved, life safety is guaranteed, and detection time is greatly shortened due to mobility.
System embodiment
According to an embodiment of the present invention, a system for detecting a working performance of a bridge expansion joint based on a smart phone is provided, and fig. 3 is a schematic structural diagram of a system for detecting a working performance of a bridge expansion joint based on a smart phone provided in one or more embodiments of the present specification, as shown in fig. 3, the system for detecting a working performance of a bridge expansion joint based on a smart phone according to an embodiment of the present invention specifically includes:
the data acquisition module 30: the method is used for collecting the vibration acceleration and the running track of the vehicle passing through the expansion joint through the smart phone when the vehicle runs at a constant speed at a normal running speed.
The intelligent mobile phone for data acquisition is installed at a certain fixed position inside the vehicle, and the vehicle can keep a constant speed to pass through a bridge group detected by the road network according to a normal driving speed.
The data acquisition module 30 includes a vibration acceleration acquisition module and a driving track recording module:
the vibration acceleration acquisition module is specifically used for:
testing vertical vibration acceleration by calling an accelerometer in a core motion frame of the smart phone, firstly correcting the influence of mobile phone inclination by a mobile phone gyroscope, collecting acceleration vibration signals in X, Y and Z directions, and recording vertical acceleration vibration data;
the driving track recording module is specifically used for:
acquiring longitude and latitude information by calling a smartphone positioning system, and recording a track according to the longitude and latitude information: starting a positioning function of the smart phone, providing three-dimensional positioning of the vehicle in a specified coordinate system in real time by depending on a GPS satellite, and recording longitude and latitude coordinates of the vehicle path at corresponding time points; calculating the distance between each time point and the starting time according to the longitude and latitude coordinates; and finally determining the travel track of the vehicle time course according to the distance.
The data processing module 32: and the vibration acceleration response of the vehicle passing through each expansion joint position within a certain period of time is obtained according to the vibration acceleration and the running track.
The data processing module 32 is specifically configured to:
and according to the length of the bridge and the position of the expansion joint, combining the determined vehicle running track and the collected vertical vibration acceleration data to obtain the vibration acceleration response of the vehicle passing through each expansion joint position in a certain time period.
The performance evaluation module 34: and the initial test data is used for comparing the initial test data with the vibration acceleration response to evaluate the working performance of the bridge expansion joint.
The performance evaluation module 34 is specifically configured to:
obtaining vibration acceleration response of a vehicle passing through each expansion joint position in a certain period of time;
the vibration acceleration response of a vehicle passing through each expansion joint position in a certain period of time obtained by the first test is used as initial test data, the same working condition detection is carried out every 3-6 months, the average value of the absolute values of the five peak values before the acceleration of each expansion joint position is used as comparison, and the working performance of the bridge expansion joint is evaluated based on the change of the average value;
if the integral variation range of the statistical absolute value is less than 5%, the working performance of the telescopic seam is good, and if the integral variation range of the statistical absolute value is more than 5%, the working performance of the telescopic seam is reduced.
The embodiment of the present invention is a system embodiment corresponding to the above method embodiment, and specific operations of each module may be understood with reference to the description of the method embodiment, which is not described herein again.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and these modifications or substitutions do not depart from the spirit of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A method for detecting the working performance of a bridge expansion joint based on a smart phone is characterized by comprising the following steps:
s1, collecting vibration acceleration and a driving track of a vehicle passing through an expansion joint through a smart phone when the vehicle is driven at a constant speed at a normal driving speed;
s2, obtaining a vibration acceleration response of the vehicle passing through each expansion joint position within a certain time period according to the vibration acceleration and the running track;
and S3, evaluating the working performance of the bridge expansion joint by comparing the initial test data with the vibration acceleration response.
2. The method according to claim 1, wherein the concrete method for collecting the vibration acceleration and the driving track of the vehicle passing through the expansion joint in the step S1 is as follows:
testing vertical vibration acceleration by calling an accelerometer in a core motion frame of the smart phone;
and acquiring longitude and latitude information by calling a smartphone positioning system, and recording a track through the longitude and latitude information.
3. The method of claim 1, wherein the smartphone is fixed in position within the cab of the vehicle during data acquisition.
4. The method according to claim 2, wherein the specific method for acquiring the longitude and latitude information recording track by calling the smartphone positioning system comprises the following steps:
recording longitude and latitude coordinates of the vehicle path at the corresponding time point;
calculating the distance between each time point and the starting time according to the longitude and latitude coordinates;
and finally determining the travel track of the vehicle time course according to the distance.
5. The method of claim 1, wherein the step S3 of evaluating the performance of the bridge expansion joint by comparing the initial test data of the vibration acceleration response comprises:
obtaining vibration acceleration response of a vehicle passing through each expansion joint position in a certain period of time;
and carrying out detection on the same working condition every 3-6 months, comparing the average value of the absolute values of the five peak values before the measured acceleration of each expansion joint position, and evaluating the working performance of the expansion joint of the bridge based on the change of the average value.
6. The utility model provides a bridge expansion joint working property detecting system based on smart mobile phone which characterized in that includes:
a data acquisition module: the intelligent mobile phone is used for acquiring the vibration acceleration and the running track of the vehicle passing through the expansion joint when the vehicle runs at a constant speed at a normal running speed;
a data processing module: the system is used for obtaining the vibration acceleration response of the vehicle passing through each expansion joint position within a certain period of time according to the vibration acceleration and the running track;
a performance evaluation module: and the initial test data is used for comparing the initial test data with the vibration acceleration response to evaluate the working performance of the bridge expansion joint.
7. The system of claim 6, wherein the smartphone is mounted in a fixed location in the interior cab of the vehicle.
8. The system of claim 6, wherein the data acquisition module comprises a vibration acceleration acquisition module and a travel track recording module:
the vibration acceleration acquisition module is used for testing vertical vibration acceleration by calling an accelerometer in a core motion frame of the smart phone;
the driving track recording module is used for acquiring longitude and latitude information by calling a smart phone positioning system and recording tracks through the longitude and latitude information.
9. The system according to claim 8, wherein the driving trajectory recording module is specifically configured to:
recording longitude and latitude coordinates of the vehicle path at the corresponding time point;
calculating the distance between each time point and the starting time according to the longitude and latitude coordinates;
and finally determining the travel track of the vehicle time course according to the distance.
10. The system of claim 6, wherein the performance evaluation module is specifically configured to:
obtaining vibration acceleration response of a vehicle passing through each expansion joint position in a certain period of time;
and carrying out the same working condition detection every 3-6 months, comparing the average value of the absolute values of the five peak values before the acceleration of each expansion joint position, and evaluating the working performance of the bridge expansion joint based on the change of the average value.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117554007A (en) * | 2024-01-12 | 2024-02-13 | 陕西炬烽建筑劳务有限公司 | Bridge expansion joint measuring device |
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