CN115930872A - Target temperature deformation correction method and system of visual deformation monitoring system - Google Patents
Target temperature deformation correction method and system of visual deformation monitoring system Download PDFInfo
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Abstract
The invention discloses a target temperature deformation correction method and a target temperature deformation correction system for a visual deformation monitoring system.
Description
Technical Field
The invention relates to a monitoring and measuring technology, in particular to a visual deformation monitoring technology.
Background
In recent years, the visual deformation monitoring technology plays an increasingly important role in the civil engineering industry as a novel monitoring and measuring means, can partially replace the traditional manual monitoring, and has the advantages of high automation degree, high monitoring frequency, high efficiency, labor saving and the like.
Compared with a binocular or multi-view system, the deformation monitoring system based on the monocular camera is most commonly adopted, is simple and convenient to install and operate, has high data processing speed, and can meet the long-term monitoring requirement of the building. The monocular camera-based visual deformation monitoring system mainly comprises a monocular intelligent camera, a target, an electric appliance cabinet, a cloud platform and the like. The target is arranged at the measuring point position and used for marking the measuring point and synchronously deforming along with the measured building; the monocular intelligent camera can automatically identify the target and regularly and intelligently calculate the displacement of the target; the electric appliance cabinet is used for supplying power to the system, is provided with a data communication module and can realize wireless remote transmission of deformation monitoring data; the cloud platform is used for receiving the target deformation data, and can achieve the functions of rapid data checking, analysis and pre-alarming.
At present, a visual deformation monitoring system based on a monocular camera is applied to a certain degree in bridge, foundation pit and side slope monitoring. However, in order to ensure the durability and the bearing capacity of the current targets, cameras and mounting brackets, metal materials and the heat-sensitive characteristics of the camera sensors are mostly adopted, so that in the practical process, the influence of the environmental temperature on related monitoring data is large. Especially, the target is large in size, so that the temperature deformation effect cannot be ignored. Therefore, when the target deformation monitoring device is placed in a monitoring environment, the target deformation measured by the visual monitoring technology comprises two parts, namely the true deformation of an attached building and the self temperature deformation of the target, when the change range of the environment temperature is large, the temperature deformation of the target is large, the true mechanical deformation characteristic of the structure can be directly covered, the authenticity and the effectiveness of a monitoring result are influenced, and the applicability and the popularization of the visual deformation monitoring technology are limited to a certain extent.
Therefore, how to effectively improve the accuracy of the visual deformation monitoring result based on the monocular camera is an urgent problem to be solved in the field.
Disclosure of Invention
Aiming at the problem of distortion of a visual monitoring result caused by target temperature deformation in the existing visual deformation monitoring scheme based on a monocular camera, the invention aims to provide a target temperature deformation correction method of a visual deformation monitoring system, and the visual deformation monitoring system based on the correction method, so that the target temperature deformation is eliminated from the visual deformation monitoring result, and the accuracy of the visual deformation monitoring result is improved.
In order to achieve the above object, the present invention provides a method for correcting target temperature deformation of a visual deformation monitoring system, comprising
(1) Establishing a target thermodynamic analysis finite element model based on the actual geometry and material parameters of the target, determining mechanical and thermodynamic parameters, and applying displacement and temperature boundary conditions;
(2) Applying uniform temperature load to the whole target in the established target thermodynamic analysis finite element model, and calculating the integral deformation characteristics of the target at different temperatures;
(3) Determining the integral deformation state data of the target at different installation angles and different temperatures according to the calculation result of the step (2), further extracting horizontal and vertical temperature deformation quantities of the center of the target under different calculation conditions, and forming a target temperature deformation quantity query statistical table based on the temperature and the installation angle according to the horizontal and vertical temperature deformation quantities;
(4) Acquiring the actual temperature of each region of the target according to a preset frequency, and calculating the average value of the actual temperature of each region of the target;
(5) Calculating the horizontal and vertical real-time temperature deformation correction quantity of the target by using a target temperature deformation inquiry statistical table based on the target installation angle and the average temperature through an interpolation algorithm;
(6) And (5) correcting the horizontal and vertical displacements of the monocular actually measured target based on the temperature deformation correction quantity calculated in the step (5).
In some examples of the present invention, the step (1) is performed based on a unified coordinate in constructing the target thermodynamic analysis finite element model.
In some examples of the present invention, in the step (1), the target installation orientation is evaluated by using a clockwise included angle θ between a central axis of the target and a vertical direction when the target thermodynamic analysis finite element model is constructed.
In some examples of the present invention, when the actual temperature of each region of the target is collected in step (4), several temperature sensors are installed on the back surface of the target, and the temperature sensors are heat-insulated and covered.
In some examples of the invention, said step (5) comprises the sub-steps of:
(5.1) according to the actual installation angle of the target, finding an angle interval where the actual installation angle is located in the target temperature deformation query statistical table determined in the step (3), and calculating the actual installation angle and vertical and horizontal temperature deformation at different temperatures by adopting a linear interpolation method;
and (5.2) based on the actually measured target average temperature, determining a temperature interval corresponding to the average temperature in a temperature deformation quantity query statistical table of the target at different temperatures under the actual installation angle determined in the step (5.1), and calculating vertical and horizontal temperature deformation quantities corresponding to the average temperature by adopting a linear interpolation method again to obtain the required temperature deformation correction quantity.
In order to achieve the purpose, the visual deformation monitoring system based on the monocular camera comprises a monocular intelligent camera, a target and a cloud platform, and further comprises a target thermodynamic analysis finite element model unit and a temperature acquisition unit;
the target thermodynamic analysis finite element model unit is used for calculating and forming a target temperature deformation inquiry statistical table based on temperature and installation angle;
the temperature acquisition unit is matched with the target and used for acquiring the actual temperature of each region of the target according to a certain frequency and transmitting the acquired data to the cloud platform;
the cloud platform is provided with a target temperature deformation query statistical table and a target temperature deformation correction unit, wherein the target temperature deformation correction unit comprises a target temperature processing module, a temperature deformation correction calculation module and a correction module;
the target temperature processing module acquires the temperature data of the temperature acquisition unit and calculates the average value of the actual temperature of each area of the target;
the temperature deformation correction calculation module calculates the target horizontal and vertical real-time temperature deformation correction through an interpolation algorithm according to the target installation angle and the average temperature calculated by the target temperature processing module and a target temperature deformation inquiry statistical table;
and the correction module corrects the horizontal and vertical displacements of the target measured by the monocular intelligent camera according to the real-time temperature deformation correction calculated and determined by the temperature deformation correction calculation module.
In some examples of the invention, the target thermodynamic analysis finite element model is built based on target actual geometry and material parameters, while determining mechanical and thermodynamic parameters, imposing displacement and temperature boundary conditions.
In some examples of the invention, the temperature acquisition unit includes a plurality of temperature sensors, a data acquisition module and a communication module, the plurality of temperature sensors are distributed on the back of the target and are in data connection with the data acquisition module, and the data acquisition module is in data connection with the cloud platform through the communication module.
In some examples of the invention, the temperature sensor is covered with a thermal insulation layer.
In some examples of the invention, the temperature deformation correction amount calculation module firstly finds an angle interval where an actual installation angle is located in a target temperature deformation query statistical table formed by two dimensions of temperature and installation angle according to the actual installation angle of a target, and calculates the actual installation angle and vertical and horizontal temperature deformation at different temperatures by adopting a linear interpolation method; and then determining a temperature interval corresponding to the average temperature based on the actually measured target average temperature, and calculating vertical and horizontal temperature deformation corresponding to the average temperature by adopting a linear interpolation method again to obtain the required temperature deformation correction.
According to the scheme provided by the invention, the target temperature deformation can be effectively removed from the visual deformation monitoring result under the condition that the overall composition framework of the deformation monitoring system based on the monocular camera is not changed, so that the accuracy of the visual deformation monitoring result is improved, and the problem that the target temperature deformation is difficult to correct in the existing visual deformation monitoring system is effectively solved.
Moreover, the scheme provided by the invention has the advantages of low overall implementation difficulty, higher feasibility, strong practicability and wider application prospect.
Drawings
The invention is further described below in conjunction with the appended drawings and the detailed description.
FIG. 1 is a schematic diagram of a finite element model for thermodynamic analysis of a target according to an embodiment of the present invention;
FIG. 2 is a front exemplary view of a target in an embodiment of the invention;
FIG. 3 is an illustration of a backside view of a target in an example of the invention.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further explained below by combining the specific drawings.
The inventor of the scheme carries out a great deal of research through the problems of the existing monocular camera-based visual deformation monitoring system, creatively establishes a temperature deformation correction table on the basis of the existing monocular camera-based visual deformation monitoring system, carries out corresponding function optimization on a target and a cloud platform, realizes temperature deformation correction under the condition of not changing the overall system composition framework, and improves the accuracy of a visual deformation monitoring result.
Specifically, the method for correcting the target temperature deformation of the visual deformation monitoring system is mainly realized through the following processes:
(1) Establishing a target thermodynamic analysis finite element model based on the actual geometry and material parameters of the target, determining mechanical and thermodynamic parameters, and applying displacement and temperature boundary conditions.
It should be noted here that in this step, a finite element model for thermodynamic analysis of the target is established, based on the unified coordinates, and different installation orientations of the target are introduced to determine the influence of the different installation orientations on the calculation result.
For example, referring to fig. 1, the target installation orientation may be evaluated by a clockwise included angle θ between the central axis of the target and the vertical direction (Y direction), and the target orientation influence within a 360 ° range needs to be considered in the calculation.
Because the target is generally in a non-centrosymmetric structure, the horizontal and vertical temperature deformation characteristics at the central point can be accurately obtained by constructing models with different installation angles.
(2) Based on the fact that the whole target is in a small-scale environment, and based on the condition that the temperatures of all the positions of the target are consistent, unified temperature loads are applied to the whole target in the established target thermodynamic analysis finite element model, and the integral deformation characteristics of the target at different temperatures are calculated.
It should be noted that, the specific temperature interval and the temperature variation involved in this step may be selected according to the actual environmental conditions in the field.
(3) And (3) determining the overall deformation state data of the target at different installation angles and different temperatures according to the calculation result of the step (2), further extracting the horizontal and vertical temperature deformation of the center of the target under different calculation conditions, and forming a target temperature deformation inquiry statistical table based on the temperature and the installation angle.
In the step, related deformation data of the target center point at different installation angles and different temperatures are directly extracted according to a model calculation result.
In addition, as a further preferable scheme, in the step, when the target temperature deformation amount query statistical table is generated, for the result sample obtained based on the model calculation, a neural network calculation model can be further introduced to perform prediction calculation on the result sample obtained by settlement, so that the result sample data obtained by calculation is optimized, and the accuracy of the result sample data is further improved. The target temperature deformation quantity formed in the target temperature deformation quantity query statistical table is high in accuracy and pertinence.
It should be noted that, the horizontal and vertical temperature deformation amounts at the center of the target calculated in this step are obtained based on the unified coordinate system determined in step (1).
(4) And acquiring the actual temperature of each region of the target according to a preset frequency, and calculating the average value of the actual temperature of each region of the target.
In the step, corresponding temperature sensors are introduced to acquire the temperatures of different areas on the target in real time. Specifically, in the step, the plurality of temperature sensors are arranged on the back surface of the target, and the distribution positions of the plurality of temperature sensors on the back surface of the target can cover the back surface of the whole target as much as possible, so that the temperature values of different areas on the target can be obtained in real time.
In order to avoid the temperature sensor being influenced by the ambient temperature and not being capable of accurately measuring the temperature of the target, the step is also to cover a layer of heat insulation layer on the temperature sensor arranged on the back of the target. The insulating layer here may consist of insulating cotton, by way of example.
(5) Based on the target installation angle, the average temperature is calculated through an interpolation algorithm according to the target temperature deformation inquiry statistical table to obtain the target horizontal and vertical real-time temperature deformation correction quantity.
For example, in the specific implementation of the step, firstly, according to the actual installation angle of the target, an angle interval where the actual installation angle is located is found in a target temperature deformation query statistical table formed by two dimensions of temperature and installation angle, and the actual installation angle and vertical and horizontal temperature deformations at different temperatures are calculated by adopting a linear interpolation method;
and then, based on the actually measured target average temperature, determining a temperature interval corresponding to the average temperature in a temperature deformation amount query statistical table of the target at different temperatures at the actual installation angle, and calculating vertical and horizontal temperature deformation amounts corresponding to the average temperature by adopting a linear interpolation method again to obtain the required temperature deformation correction amount.
(6) And (6) correcting horizontal and vertical displacements of the monocular actually measured target based on the temperature deformation correction quantity calculated in the step (5).
In the step, the target temperature deformation is eliminated from the visual deformation monitoring result by subtracting the corresponding target temperature deformation correction amount from the horizontal and vertical displacements of the actual measurement target of the monocular intelligent camera, so that the temperature deformation is corrected, and the accuracy of the visual deformation monitoring result is improved.
The target temperature deformation modification scheme for the above-mentioned visual deformation monitoring system is further described by way of example below.
In the embodiment, the corresponding monocular camera-based visual deformation monitoring system is constructed based on the visual deformation monitoring system target temperature deformation correction scheme, and the system can effectively remove the target temperature deformation from the visual deformation monitoring result, so that the temperature deformation is corrected, and the accuracy of the visual deformation monitoring result is improved.
Specifically, the visual deformation monitoring system based on the monocular camera mainly comprises a monocular intelligent camera, a target, a temperature acquisition unit and a cloud platform in composition.
The monocular intelligent camera in the system can automatically identify the target and regularly and intelligently calculate the displacement of the target, and the specific constitution is the same as that of the prior art, and the details are not repeated here.
The target 200 (as shown in fig. 2) in the system is installed at the measuring point position, and is used for marking the measuring point and generating synchronous deformation along with the measured building structure, and the specific structure is the same as the prior art, and is not described herein again.
The temperature acquisition unit in the system is matched with the target and used for acquiring the actual temperature of each region of the target according to a certain frequency and transmitting the acquired data to the cloud platform.
Referring to fig. 3, the temperature acquisition unit 10 in the system mainly includes a plurality of temperature sensors 11, a data acquisition module 12, and a communication module 13.
The temperature sensors 11 are distributed on the back of the target 200 to obtain temperature values of different areas on the target in real time.
Preferably, in this embodiment, when the plurality of temperature sensors 11 are distributed, the target support rods 210 and the target surface 220 need to be covered, and the number of the temperature sensors should reflect the overall temperature distribution of the target.
For example, in the present embodiment, 6 temperature sensors 11 are used, and 1 temperature sensor is mounted on the target support rod 210, and 5 temperature sensors are mounted on the target surface 220, wherein one temperature sensor is respectively disposed at four corners of the target surface 220, and 1 temperature sensor is disposed at the center of the target.
The 6 temperature sensors mounted on the target 200 were each coated with heat-insulating cotton.
The data acquisition module 12 in the unit is respectively connected with each temperature sensor 11 through a lead 14. The data acquisition module 12 is capable of acquiring data for each temperature sensor at a frequency.
The specific structure of the data acquisition module 12 is not limited herein, and may be determined according to actual requirements.
The communication module 13 in the unit is in data connection with the data acquisition module 12 and is used for transmitting the temperature data acquired by the data acquisition module 12 to the cloud platform.
The specific structure of the communication module 13 is not limited herein, and may be determined according to actual requirements.
A corresponding target thermodynamic analysis finite element model is constructed in a cloud platform in the system, a temperature deformation correction table is constructed according to the model, on the basis, the target horizontal and vertical real-time temperature deformation correction values are calculated according to the average temperature based on the target installation angle, and the horizontal and vertical displacements of the actual measurement target of the monocular intelligent camera are corrected based on the real-time temperature deformation correction values.
The cloud platform specifically comprises a target temperature deformation correction unit, and the target temperature deformation correction unit comprises a target thermodynamic analysis finite element model, a target temperature processing module, a temperature deformation correction calculation module and a correction module.
The target thermodynamic analysis finite element model is used for calculating and forming a target temperature deformation inquiry statistical table based on temperature and installation angle.
Specifically, when the finite element model for target thermodynamic analysis is established, based on the target specification, type and material parameters actually adopted by the system, the finite element model for target thermodynamic analysis is established through finite element analysis software such as ANSYS and the like, mechanical and thermodynamic parameters are input, and displacement and temperature boundary conditions are applied, wherein a fixed displacement boundary is applied to a support at the bottom of the target, and other parts are free boundaries. Target orientation influence in a 360-degree range needs to be considered in calculation, and modeling can be performed according to 5-degree increment.
And further applying uniform temperature load to the whole target based on the established target thermodynamic analysis finite element model, and calculating the whole deformation characteristics of the target at different temperatures. The specific temperature interval and the temperature variation can be selected according to the actual environmental conditions on site, the suggested value range is [ -50 ℃,100 ℃), and the temperature increment can be 1 ℃.
Finally, through the analysis, the overall deformation conditions of the target at different installation angles and different temperatures can be obtained, and the horizontal and vertical temperature deformation quantities of the center of the target under different calculation conditions are further extracted, so that a target temperature deformation quantity inquiry statistical table based on the temperature and the installation angles is formed, and the following steps are shown:
target temperature deformation inquiry statistical table
It should be noted that the formed target temperature deformation query statistical table can be embedded into a cloud platform as an independent functional unit, so as to facilitate rapid extraction in the subsequent correction calculation.
Alternatively, the formed target temperature deformation query statistical table can be used as a sub-function module of a target thermodynamic analysis finite element model to provide an external adjustment query.
As an alternative, the target thermodynamic analysis finite element model in the scheme may be operated as an independent functional module unit instead of being operated in the cloud platform, so as to form a target temperature deformation query statistical table; the independent target thermodynamic analysis finite element model can lead the generated target temperature deformation inquiry statistical table into the cloud platform, so that the correction amount can be rapidly extracted in the subsequent correction amount calculation process. The scheme of the target temperature deformation query statistical table generated by the finite element model for thermodynamic analysis of the independent target is the same as the above, and is not repeated here.
The finite element models for target thermodynamic analysis are independently distributed, so that the modeling and calculation schemes can be adjusted in real time according to the field conditions in actual application, and the efficiency is effectively improved.
The target temperature processing module in the cloud platform can enable the target and the temperature sensors mounted on the target to form a one-to-one correspondence relationship, and the module also obtains temperature data uploaded by the temperature acquisition unit and automatically calculates the average value of each temperature sensor of the target.
The specific structure of the target temperature processing module is not limited herein, and may be determined according to actual requirements.
The temperature deformation correction amount calculation module in the cloud platform is in data interaction with the target temperature processing module, and can calculate the horizontal and vertical real-time temperature deformation correction amounts of the target through the target temperature deformation inquiry statistical table by the interpolation algorithm according to the average temperature calculated by the target temperature processing module based on the target installation angle.
Specifically, the temperature deformation correction amount calculation module may specifically adopt two times of linear interpolation, and the specific process is as follows:
the temperature deformation correction calculation module firstly finds an angle interval where an actual installation angle is located in a target temperature deformation query statistical table formed by two dimensions of temperature and the installation angle according to the actual installation angle of a target, and calculates the actual installation angle and vertical and horizontal temperature deformations at different temperatures by adopting a linear interpolation method;
and the temperature deformation correction amount calculation module determines a temperature interval corresponding to the average temperature based on the actually measured target average temperature, and calculates vertical and horizontal temperature deformation amounts corresponding to the average temperature by adopting a linear interpolation method again to obtain the required temperature deformation correction amount.
The correction module in the cloud platform performs data interaction with the temperature deformation correction amount calculation module and is used for correcting the horizontal and vertical displacements of the target actually measured by the monocular intelligent camera according to the real-time temperature deformation correction amount calculated and determined by the temperature deformation correction amount calculation module.
Specifically, the correction module subtracts the corresponding target temperature deformation correction amount from the horizontal and vertical displacements of the actual measurement target of the monocular intelligent camera to correct the temperature deformation.
The monocular camera-based visual deformation monitoring system formed by the embodiment completes organic deployment of a monocular intelligent camera, a target, a temperature acquisition unit and a cloud platform when running.
The monocular intelligent camera automatically identifies the target, the displacement of the target is regularly and intelligently calculated, and the calculation result is uploaded to the cloud platform.
Meanwhile, a data acquisition module in the temperature acquisition unit acquires data of each temperature sensor on the target according to a certain frequency and transmits the data to a cloud platform of the visual deformation monitoring system.
And a target temperature processing module in the cloud platform acquires temperature data uploaded by the temperature acquisition unit and automatically calculates the average value of each temperature sensor of the target.
And a temperature deformation correction amount calculation module in the cloud platform is in data interaction with a target temperature processing module, and based on the target installation angle, the average temperature is calculated by a determined target temperature deformation amount inquiry statistical table through an interpolation algorithm to obtain the horizontal and vertical real-time temperature deformation correction amounts of the target.
And finally, a correction module in the cloud platform corrects the horizontal and vertical displacements of the target actually measured by the monocular intelligent camera based on the real-time temperature deformation correction quantity obtained through calculation, and the target temperature deformation quantity is removed from the visual deformation monitoring result, so that the accuracy of the visual deformation monitoring result is improved.
Therefore, the monocular camera-based visual deformation monitoring system provided by the embodiment is additionally provided with the temperature measuring module, the data acquisition module and the communication module by establishing the temperature deformation correction table, and improves the function of the cloud platform end, so that the problem that the real deformation of the structure is covered by the current target temperature deformation can be effectively solved, and the applicability of the visual deformation monitoring system is improved.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (10)
1. The target temperature deformation correction method of the visual deformation monitoring system is characterized by comprising the following steps
(1) Establishing a target thermodynamic analysis finite element model based on the actual geometry and material parameters of the target, determining mechanical and thermodynamic parameters, and applying displacement and temperature boundary conditions;
(2) Applying uniform temperature load to the whole target in the established target thermodynamic analysis finite element model, and calculating the integral deformation characteristics of the target at different temperatures;
(3) Determining integral deformation state data of the target at different installation angles and different temperatures according to the calculation result of the step (2), further extracting horizontal and vertical temperature deformation quantities of the center of the target under different calculation conditions, and forming a target temperature deformation quantity query statistical table based on the temperature and the installation angles according to the horizontal and vertical temperature deformation quantities;
(4) Acquiring the actual temperature of each region of the target according to a preset frequency, and calculating the average value of the actual temperature of each region of the target;
(5) Calculating the horizontal and vertical real-time temperature deformation correction quantity of the target by using a target temperature deformation inquiry statistical table based on the target installation angle and the average temperature through an interpolation algorithm;
(6) And (5) correcting the horizontal and vertical displacements of the monocular actually measured target based on the temperature deformation correction quantity calculated in the step (5).
2. The method for modifying temperature deformation of a target in a visual deformation monitoring system according to claim 1, wherein the step (1) is performed based on unified coordinates when constructing the finite element model for thermodynamic analysis of the target.
3. The method for correcting target temperature deformation of a visual deformation monitoring system according to claim 1, wherein in the step (1), when a finite element model for thermodynamic analysis of the target is constructed, the installation orientation of the target is evaluated by a clockwise included angle θ between a central axis of the target and the vertical direction.
4. The method for correcting temperature deformation of the target in the visual deformation monitoring system according to claim 1, wherein a plurality of temperature sensors are installed on the back surface of the target and are heat-insulated and coated when the actual temperature of each region of the target is collected in the step (4).
5. The visual deformation monitoring system target temperature deformation modification method of claim 1, wherein the step (5) comprises the following sub-steps:
(5.1) according to the actual installation angle of the target, finding an angle interval where the actual installation angle is located in the target temperature deformation query statistical table determined in the step (3), and calculating the actual installation angle and vertical and horizontal temperature deformation at different temperatures by adopting a linear interpolation method;
and (5.2) based on the actually measured target average temperature, determining a temperature interval corresponding to the average temperature in a temperature deformation quantity query statistical table of the target at different temperatures under the actual installation angle determined in the step (5.1), and calculating vertical and horizontal temperature deformation quantities corresponding to the average temperature by adopting a linear interpolation method again to obtain the required temperature deformation correction quantity.
6. The visual deformation monitoring system based on the monocular camera comprises a monocular intelligent camera, a target and a cloud platform, and is characterized by further comprising a target thermodynamic analysis finite element model unit and a temperature acquisition unit;
the target thermodynamic analysis finite element model unit is used for calculating and forming a target temperature deformation inquiry statistical table based on temperature and installation angle;
the temperature acquisition unit is matched with the target and is used for acquiring the actual temperature of each area of the target according to a certain frequency and transmitting the acquired data to the cloud platform;
the cloud platform is provided with a target temperature deformation query statistical table and a target temperature deformation correction unit, wherein the target temperature deformation correction unit comprises a target temperature processing module, a temperature deformation correction calculation module and a correction module;
the target temperature processing module acquires the temperature data of the temperature acquisition unit and calculates the average value of the actual temperature of each area of the target;
the temperature deformation correction calculation module calculates the target horizontal and vertical real-time temperature deformation correction through an interpolation algorithm according to the target installation angle and the average temperature calculated by the target temperature processing module and a target temperature deformation inquiry statistical table;
and the correction module corrects the horizontal and vertical displacements of the target measured by the monocular intelligent camera according to the real-time temperature deformation correction calculated and determined by the temperature deformation correction calculation module.
7. The monocular camera-based visual deformation monitoring system of claim 6, wherein the target thermodynamic analysis finite element model unit is built based on target actual geometry and material parameters, while determining mechanical and thermodynamic parameters, imposing displacement and temperature boundary conditions.
8. The monocular camera-based visual deformation monitoring system of claim 6, wherein the temperature acquisition unit comprises a plurality of temperature sensors, a data acquisition module and a communication module, the plurality of temperature sensors are distributed on the back of the target and are in data connection with the data acquisition module, and the data acquisition module is in data connection with the cloud platform through the communication module.
9. Monocular camera-based visual deformation monitoring system according to claim 8, characterized in that the temperature sensor is covered with a thermal insulation layer.
10. The monocular camera-based visual deformation monitoring system of claim 6, wherein the temperature deformation correction amount calculation module first finds an angle interval where an actual installation angle is located in a target temperature deformation amount query statistical table formed by two dimensions of temperature and installation angle according to the actual installation angle of the target, and calculates the actual installation angle, vertical and horizontal temperature deformation amounts at different temperatures by using a linear interpolation method; and then determining a temperature interval corresponding to the average temperature based on the actually measured target average temperature, and calculating vertical and horizontal temperature deformation corresponding to the average temperature by adopting a linear interpolation method again to obtain the required temperature deformation correction.
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| CN116974295A (en) * | 2023-09-22 | 2023-10-31 | 北京星河动力装备科技有限公司 | Flight control method and device of target and target |
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| CN116974295A (en) * | 2023-09-22 | 2023-10-31 | 北京星河动力装备科技有限公司 | Flight control method and device of target and target |
| CN116974295B (en) * | 2023-09-22 | 2024-02-23 | 北京星河动力装备科技有限公司 | Flight control method and device of target and target |
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