An infrared-based temperature measurement system for paving asphalt

Abstract

The invention discloses an infrared-based paving asphalt temperature measurement system, which relates to the field of temperature measurement. The system comprises: an infrared camera, a first positioning component, a second positioning component and a processor; the first positioning component, the second positioning component and the infrared camera are all arranged on a paving machine and are all connected to the processor; the first positioning component is used to collect the first position of the paving machine in real time, the second positioning component is used to collect the second position of the paving machine in real time, and the infrared camera is used to collect the infrared image of the paved road section within the setting range of the paving machine in real time; the processor is used to generate a paving asphalt temperature distribution diagram including the temperature value at each position coordinate of the paved road section according to the first position, the second position, the infrared image, the distance between the first positioning component and the infrared camera, the distance between the second positioning component and the infrared camera and the initial paving position. The invention improves the efficiency and accuracy of paving asphalt temperature measurement.

Description

Technical Field

[0001] The invention relates to the field of temperature measurement, and in particular to an infrared-based asphalt paving temperature measurement system. Background Art

[0002] Asphalt mixture is very sensitive to temperature. Under the same rolling process, areas with low temperature are difficult to compact, the compaction degree is relatively low, the road surface void ratio is large, and potholes, looseness and other problems are prone to occur. Areas with higher temperature are easy to compact, the compaction degree is relatively high, the road surface void ratio is small, and oil spills are prone to occur. Therefore, during the asphalt paving process, the temperature of the asphalt pavement needs to be tested so as to appropriately adjust the mixture rolling process to ensure the density and uniformity of the asphalt pavement.

[0003] In the prior art, when testing the temperature of asphalt pavement, technicians can only conduct fixed-point testing. In order to obtain effective data, technicians often need to conduct large-scale and multi-point testing, which undoubtedly increases the workload of technicians. In addition, the temperature measurement of the asphalt pavement is not comprehensive enough, so it is impossible to accurately analyze whether the asphalt pavement is compacted. Summary of the invention

[0004] The purpose of the present invention is to provide an infrared-based asphalt paving temperature measurement system, which can improve the efficiency and accuracy of asphalt paving temperature measurement.

[0005] To achieve the above-mentioned purpose, the present invention provides an infrared-based asphalt paving temperature measurement system, comprising: an infrared camera, a first positioning component, a second positioning component and a processor.

[0006] The first positioning component, the second positioning component and the infrared camera are all arranged on the paving machine; the first positioning component, the second positioning component and the infrared camera are all connected to the processor.

[0007] The first positioning component is used to collect the first position of the paver in real time, the second positioning component is used to collect the second position of the paver in real time, and the infrared camera is used to collect the infrared image of the paved road section within the set range of the paver in real time.

[0008] The processor is used to generate a paved asphalt temperature distribution map of the paved road section based on the first position, the second position, the infrared image, the distance between the first positioning component and the infrared camera, the distance between the second positioning component and the infrared camera, and the initial paving position; the paved asphalt temperature distribution map includes the temperature value at each position coordinate of the paved road section.

[0009] Optionally, the first positioning component and the second positioning component are both global navigation satellite systems GNSS.

[0010] Optionally, a bracket and an arm are provided on the top of the paver; the arm is fixed to the bracket and extends along the paved road section; the first positioning component and the second positioning component are respectively arranged at both ends of the bracket; and the infrared camera is arranged on the arm.

[0011] Optionally, the installation angle of the infrared camera is determined according to the paving width of the paver.

[0012] Optionally, the processor includes a sampling module, a fitting module, a storage module, a camera position determination module, a pixel position determination module and a distribution map generation module.

[0013] The sampling module is connected to the infrared camera and is used to sample the infrared image to obtain a plurality of sampling points and a temperature value at each sampling point.

[0014] The fitting module is connected to the sampling module and is used to fit the temperature values ​​at multiple sampling points to determine the temperature value at each pixel in the infrared image.

[0015] A storage module is used to store the distance between the first positioning component and the infrared camera, the distance between the second positioning component and the infrared camera, and the initial paving position; the initial paving position includes the initial positions of the endpoints on both sides of the road section to be paved.

[0016] The camera position determination module is respectively connected to the first positioning component, the second positioning component and the storage module, and is used to determine the position of the infrared camera according to the first position, the second position, the distance between the first positioning component and the infrared camera, and the distance between the second positioning component and the infrared camera.

[0017] The pixel position determination module is respectively connected to the fitting module, the storage module and the camera position determination module, and is used to determine the position coordinates of each pixel point in the infrared image according to the position of the infrared camera and the initial paving position.

[0018] The distribution map generation module is connected to the fitting module and the pixel position determination module respectively, and is used to generate a paved asphalt temperature distribution map of the paved road section according to the temperature value and position coordinates at each pixel point in the infrared image.

[0019] Optionally, a controller is provided on the paving machine, and the processor is integrated on the controller.

[0020] Optionally, the infrared-based asphalt paving temperature measurement system also includes an alarm component; the alarm component is connected to the controller; the controller is used to control the alarm component to generate a warning signal when the lowest temperature value in the asphalt paving temperature distribution diagram is lower than the set minimum temperature for multiple consecutive moments, so as to prompt the staff to improve the paving and rolling process.

[0021] Optionally, the processor is further used to send the asphalt paving temperature distribution map to a remote management platform in real time; the remote management platform is used to perform temperature segregation analysis based on the asphalt paving temperature distribution map.

[0022] According to the specific embodiments provided by the present invention, the present invention discloses the following technical effects: the present invention collects the position of the paver in real time through two positioning components, collects the infrared image of the paved road section within the set range of the paver in real time through the infrared camera, and generates a paved asphalt temperature distribution map including the temperature value at each position coordinate of the paved road section based on the position collected by the positioning components and the infrared image collected by the infrared camera. No manual fixed-point detection is required, which improves the efficiency of temperature measurement, and the measured temperature values ​​are more comprehensive, and can directly display the position coordinates of the paved section and the temperature value at each position coordinate, thereby improving the accuracy of paving asphalt temperature measurement. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0024] Figure 1 This is a structural block diagram of the infrared-based asphalt paving temperature measurement system provided by the present invention.

[0025] Explanation of symbols: 1-first positioning component, 2-second positioning component, 3-infrared camera, 4-processor. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] The purpose of the present invention is to provide an infrared-based asphalt paving temperature measurement system, which, through the cooperation of an infrared camera, a positioning component and a processor, can accurately monitor the temperature at various positions of a paved road section in real time during the pavement paving process.

[0028] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0029] like Figure 1 As shown, the infrared-based asphalt paving temperature measurement system provided by the present invention includes: an infrared camera 3, a first positioning component 1, a second positioning component 2 and a processor 4.

[0030] The first positioning component 1 , the second positioning component 2 and the infrared camera 3 are all arranged on the paving machine. The first positioning component 1 , the second positioning component 2 and the infrared camera 3 are all connected to the processor 4 .

[0031] In this embodiment, the first positioning component 1 and the second positioning component 2 are both Global Navigation Satellite System (GNSS).

[0032] A bracket and an arm are provided on the top of the paver. The arm is fixed to the bracket and extends along the paved road section. The first positioning component 1 and the second positioning component 2 are respectively provided at both ends of the bracket. The infrared camera 3 is provided on the arm. Specifically, the bracket extends along the width of the paved road surface, and the arm extends along the paving direction.

[0033] The installation angle of the infrared camera 3 is determined according to the paving width of the paving machine. By adjusting the installation angle of the infrared camera 3, the paving width temperature can be changed, and a super large paving width (maximum 22 meters) can be monitored.

[0034] The first positioning component 1 is used to collect the first position of the paver in real time, the second positioning component 2 is used to collect the second position of the paver in real time, and the infrared camera 3 is used to collect the infrared image of the paved road section within the set range of the paver in real time.

[0035] The first position and the second position are both three-dimensional coordinates.

[0036] The processor 4 is used to generate a paved asphalt temperature distribution map of the paved road section according to the first position, the second position, the infrared image, the distance between the first positioning component 1 and the infrared camera 3, the distance between the second positioning component 2 and the infrared camera 3, and the initial paving position. The paved asphalt temperature distribution map includes the temperature value at each position coordinate of the paved road section.

[0037] Specifically, the processor 4 includes: a sampling module, a fitting module, a storage module, a camera position determination module, a pixel position determination module and a distribution map generation module.

[0038] The sampling module is connected to the infrared camera 3, and is used to sample the infrared image to obtain a plurality of sampling points and the temperature value at each sampling point. The sampling point is a pixel point in the infrared image.

[0039] The fitting module is connected to the sampling module, and the fitting module is used to fit the temperature values ​​at multiple sampling points to determine the temperature value at each pixel in the infrared image. By fitting the temperature values ​​at the sampling points, the temperature values ​​at each pixel between the sampling points can be obtained, and finally the fitted temperature value at each pixel in the infrared image can be obtained.

[0040] The storage module is used to store the distance between the first positioning component 1 and the infrared camera 3, the distance between the second positioning component 2 and the infrared camera 3, and the initial paving position.

[0041] The distance between the first positioning component 1 and the infrared camera 3 and the position between the second positioning component 2 and the infrared camera 3 are fixed during installation. The initial paving position includes the initial positions of the end points on both sides of the road section to be paved.

[0042] The camera position determination module is respectively connected to the first positioning component 1, the second positioning component 2 and the storage module, and the camera position determination module is used to determine the position of the infrared camera 3 according to the first position, the second position, the distance between the first positioning component 1 and the infrared camera 3, and the distance between the second positioning component 2 and the infrared camera 3.

[0043] Since the distance between the first positioning component 1 and the infrared camera 3 and the distance between the second positioning component 2 and the infrared camera 3 are known, the position of the infrared camera 3 can be calculated based on the positions collected by the two positioning components.

[0044] The pixel position determination module is connected to the fitting module, the storage module and the camera position determination module respectively, and the pixel position determination module is used to determine the position coordinates of each pixel point in the infrared image according to the position of the infrared camera 3 and the initial paving position.

[0045] Specifically, the travel distance is recorded in real time during the movement of the paver, and the positions of the end points on both sides of the paved road section can be determined based on the travel distance and the initial paving position.

[0046] The height and acquisition angle (range) of the infrared camera 3 are known during installation. Based on the position, height, acquisition angle (range) of the infrared camera 3 and the position of the end points on both sides of the paved road section, the pixel coordinates of each pixel point in the infrared image are mapped to the real coordinates, and the position coordinates of each pixel point in the infrared image can be calculated.

[0047] The distribution map generation module is connected to the fitting module and the pixel position determination module respectively, and is used to generate a paved asphalt temperature distribution map of the paved road section according to the temperature value and position coordinates at each pixel point in the infrared image.

[0048] As a specific implementation manner, the paving machine is provided with a controller, and the processor 4 is integrated on the controller.

[0049] The infrared-based asphalt paving temperature measurement system also includes an alarm component. The alarm component is connected to the controller. The controller is used to control the alarm component to generate a warning signal when the lowest temperature value in the asphalt paving temperature distribution diagram is lower than the set lowest temperature for multiple consecutive moments, so as to prompt the staff to improve the paving and rolling process.

[0050] The alarm component may be a warning light and / or a buzzer.

[0051] Furthermore, the processor 4 is also used to send the paving asphalt temperature distribution map to the remote management platform in real time. The remote management platform is used to perform temperature segregation analysis based on the paving asphalt temperature distribution map. The remote management platform is a cloud platform that can automatically upload measurement data to facilitate data management and quality traceability. Among them, temperature segregation refers to the situation that the temperature distribution of the paved road surface is uneven due to the inconsistent temperature drop rate of the mixture in different parts during the transportation and paving process of the hot mix asphalt mixture.

[0052] When the lowest temperature value in the paving asphalt temperature distribution diagram is lower than the set lowest temperature for multiple consecutive moments, the controller is also used to send an alarm signal to the remote management platform, prompting the staff on the remote management platform to improve the paving and rolling process.

[0053] The remote management platform is also used to generate the maximum temperature distribution map, minimum temperature distribution map, average temperature distribution map, temperature distribution statistics map, detailed thermal profile of asphalt layer laying, etc. according to the paving asphalt temperature distribution map within the set time period, and generate a speed curve map according to the speed of the paver. The management personnel can analyze the quality of asphalt pavement paving through the above information generated by the remote management platform and obtain the complete inspection results of the entire paved road.

[0054] Managers can send control instructions to the controller on the paver through the remote management platform to control the operating status of the paver and communicate with on-site staff.

[0055] In addition, a display screen is integrated on the controller, and the controller is also used to display temperature abnormality information on the display screen when the lowest temperature value in the paving asphalt temperature distribution map is lower than the set lowest temperature for multiple consecutive moments. The temperature abnormality information includes the set lowest temperature, the lowest temperature value in the paving asphalt temperature distribution map, and the number of moments when the lowest temperature value in the paving asphalt temperature distribution map is continuously lower than the set lowest temperature.

[0056] The display screen can also show the current speed of the paver, the temperature distribution diagram of the paving asphalt, the paver number, the paving process, the location and other information.

[0057] The controller can also be integrated with a voice call module to interact with on-site staff through the voice call module. The interactive content can be: outputting information such as the lowest temperature value, the highest temperature value, the current speed of the paver in the asphalt paving temperature distribution map through voice, and receiving relevant instructions from on-site staff.

[0058] In order to improve the visualization of the paved asphalt temperature, a light-emitting diode (LED) display screen is also installed on the paver. The size of the LED display screen is larger than that of the display screen on the controller. The LED display screen displays the minimum and maximum temperature values ​​of the paved section in real time.

[0059] Furthermore, in order to take remedial measures for paved sections that do not meet quality requirements, different colors of paint can be sprayed on paved sections in unqualified areas during the paving process, so that staff can accurately find unqualified road surfaces in the future. In addition, the asphalt temperature of the road surface can be judged based on the different colors of the paint, whether it is too low or too high, so that operators can take remedial measures such as replacement and adjustment of construction technology for unqualified road surfaces to ensure road surface quality.

[0060] The present invention can monitor the interior of the asphalt pavement in real time during the pavement paving process, and can timely learn the adverse factors generated during the asphalt paving process, so that the staff can determine the solution in time and control the adverse factors, thereby ensuring the paving quality.

[0061] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0062] The principles and implementation methods of the present invention are described in this article using specific examples. The description of the above embodiments is only used to help understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. An infrared-based asphalt paving temperature measurement system, characterized in that: The infrared-based asphalt paving temperature measurement system includes: an infrared camera, a first positioning component, a second positioning component and a processor; The first positioning component, the second positioning component and the infrared camera are all arranged on the paver; the first positioning component, the second positioning component and the infrared camera are all connected to the processor; The first positioning component is used to collect the first position of the paver in real time, the second positioning component is used to collect the second position of the paver in real time, and the infrared camera is used to collect the infrared image of the paved road section within the set range of the paver in real time; The processor is used to generate a paved asphalt temperature distribution map of the paved road section according to the first position, the second position, the infrared image, the distance between the first positioning component and the infrared camera, the distance between the second positioning component and the infrared camera, and the initial paving position; the paved asphalt temperature distribution map includes the temperature value at each position coordinate of the paved road section; the paver is also provided with a light-emitting diode display screen, which displays the lowest temperature value and the highest temperature value of the paved road section in real time through the light-emitting diode display screen; The processor comprises: A sampling module, connected to the infrared camera, for sampling the infrared image to obtain a plurality of sampling points and a temperature value at each sampling point; A fitting module, connected to the sampling module, for fitting the temperature values ​​at a plurality of sampling points to determine the temperature value at each pixel in the infrared image; A storage module, used to store the distance between the first positioning component and the infrared camera, the distance between the second positioning component and the infrared camera, and an initial paving position; the initial paving position includes the initial positions of the endpoints on both sides of the road section to be paved; a camera position determination module, connected to the first positioning component, the second positioning component and the storage module respectively, and used to determine the position of the infrared camera according to the first position, the second position, the distance between the first positioning component and the infrared camera, and the distance between the second positioning component and the infrared camera; The pixel position determination module is connected to the fitting module, the storage module and the camera position determination module respectively, and is used to determine the position coordinates of each pixel point in the infrared image according to the position of the infrared camera and the initial paving position; specifically, the positions of the end points on both sides of the paved road section are determined according to the travel distance and the initial paving position; the pixel coordinates of each pixel point in the infrared image are mapped to the real coordinates according to the position, height, acquisition angle of the infrared camera and the positions of the end points on both sides of the paved road section, and the position coordinates of each pixel point in the infrared image are deduced; a distribution map generating module, connected to the fitting module and the pixel position determining module respectively, for generating a paved asphalt temperature distribution map of the paved road section according to the temperature value and position coordinates at each pixel point in the infrared image; The processor is also used to send the paving asphalt temperature distribution map to the remote management platform in real time; the remote management platform is used to perform temperature segregation analysis according to the paving asphalt temperature distribution map; temperature segregation refers to the situation that the temperature distribution of the paved road surface is uneven due to the inconsistent temperature drop rate of the mixture in different parts during the transportation and paving process of the hot mix asphalt mixture; The remote management platform is also used to generate maximum temperature distribution maps, minimum temperature distribution maps, average temperature distribution maps, temperature distribution statistics maps, detailed thermal profiles of asphalt layer laying, etc. based on the paving asphalt temperature distribution map within a set time period, and generate speed curves based on the speed of the paver. Management personnel can analyze the quality of asphalt pavement paving through the above information generated by the remote management platform and obtain complete inspection results for the entire paved road.

2. The infrared-based asphalt paving temperature measurement system according to claim 1 is characterized in that: The first positioning component and the second positioning component are both global navigation satellite systems GNSS.

3. The infrared-based asphalt paving temperature measurement system according to claim 1, characterized in that: A bracket and an arm are provided on the top of the paver; the arm is fixed to the bracket and extends along the paved road section; the first positioning component and the second positioning component are respectively provided at two ends of the bracket; The infrared camera is arranged on the supporting arm.

4. The infrared-based asphalt paving temperature measurement system according to claim 1, characterized in that: The installation angle of the infrared camera is determined according to the paving width of the paver.

5. The infrared-based asphalt paving temperature measurement system according to claim 1, characterized in that: The paving machine is provided with a controller, and the processor is integrated on the controller.

6. The infrared-based asphalt paving temperature measurement system according to claim 5, characterized in that: The infrared-based asphalt paving temperature measurement system further includes an alarm component; the alarm component is connected to the controller; The controller is used to control the alarm component to generate a warning signal when the lowest temperature value in the paving asphalt temperature distribution diagram is lower than the set lowest temperature for multiple consecutive moments, so as to prompt the staff to improve the paving and rolling process.

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