Cladding quality visualization method and system integrating infrared thermal imaging and laser ultrasonic technology

Abstract

The invention belongs to the technical field of laser cladding, and particularly relates to a cladding quality visualization method and system integrating an infrared thermal imaging technology and a laser ultrasonic technology, and the method comprises the steps: constructing a molten pool quality monitoring system integrating the infrared thermal imaging technology and the laser ultrasonic technology; the infrared thermal imaging module is used for measuring the temperature of the surface of the molten pool in real time to obtain a temperature distribution image of the surface of the molten pool; through an image processing technology, a temperature signal is extracted and is used as a feedback signal for controlling parameters such as laser power; the laser ultrasonic module emits laser pulses to the cooled cladding layer to excite ultrasonic waves; when ultrasonic waves are propagated in a cladding layer and encounter internal defects, the phenomena of reflection, scattering and the like can occur; the reflected ultrasonic signals are received and analyzed to obtain defect information in the molten pool; and the data processing and visualization module carries out fusion processing on the temperature information and the defect information to generate a comprehensive visualization image of the quality of the molten pool. The advantages of the two technologies are combined, real-time monitoring and visualization of the surface temperature and the internal quality of the molten pool are achieved, and the control precision of the cladding process and the product quality are improved.

Description

Technical Field

[0001] The present invention belongs to but is not limited to the field of laser cladding technology, and in particular relates to a cladding quality visualization method and system integrating infrared thermal imaging and laser ultrasonic technology. Background Art

[0002] Laser cladding technology has been widely used in the field of metal surface modification and repair due to its high efficiency and precision. However, the temperature, internal structure and quality of the molten pool during the cladding process are difficult to directly observe and control, resulting in unstable quality of the cladding layer. In the prior art, infrared thermal imaging technology is mainly used to monitor the temperature distribution on the surface of the molten pool, and to control parameters such as laser power through temperature signals to improve the cladding quality. However, this method can only provide temperature information and cannot fully reflect the internal quality of the molten pool. Laser ultrasonic technology uses laser to excite ultrasonic waves and uses the propagation characteristics of ultrasonic waves in the material to detect internal defects of the material, but it is difficult to obtain temperature information on the surface of the molten pool in real time when used alone. However, the two have not yet been effectively combined and applied to the comprehensive detection and quality visualization of laser cladding molten pools. Summary of the invention

[0003] In view of the problems existing in the prior art, the present invention provides a cladding quality visualization method and system integrating infrared thermal imaging and laser ultrasonic technology.

[0004] The present invention is implemented as follows: a cladding quality visualization method integrating infrared thermal imaging and laser ultrasonic technology, the method comprising:

[0005] S1, build a molten pool quality monitoring system integrating infrared thermal imaging and laser ultrasonic technology, including infrared thermal imaging module, laser ultrasonic module, data processing and visualization module, etc.;

[0006] S2, the infrared thermal imaging module includes an infrared thermal imager and an infrared image processing module. The infrared thermal imaging module is used to measure the temperature of the molten pool surface in real time to obtain a temperature distribution image of the molten pool surface; the temperature signal is extracted through image processing technology and used as a feedback signal for controlling parameters such as laser power;

[0007] S3, the laser ultrasonic module includes a laser excitation source, a laser ultrasonic receiving module, a signal processing module, etc. The laser ultrasonic module is used to emit laser pulses to the cooled cladding layer to excite ultrasonic waves. When the ultrasonic waves propagate in the cladding layer, they will be reflected and scattered when encountering internal defects such as pores and cracks. By receiving and analyzing the reflected ultrasonic signals, the defect information inside the molten pool can be obtained.

[0008] S4, the data processing and visualization module fuses the temperature information obtained by the infrared thermal imaging module with the defect information obtained by the laser ultrasonic module to generate a comprehensive visualization image of the molten pool quality; this image can simultaneously display the temperature distribution on the molten pool surface and the internal defects, providing operators with intuitive monitoring results.

[0009] Furthermore, the infrared thermal imager in S2 is placed directly at the molten pool, the laser excitation source in S3 is aimed at the cladding layer at a short distance after the molten pool is cooled, and the laser ultrasonic receiving module is placed next to the laser excitation source; during the laser cladding process, the infrared thermal imaging module and the laser ultrasonic module are started at the same time to synchronously detect the molten pool; the infrared thermal imaging data and the laser ultrasonic data are collected and processed in real time to extract the temperature information and internal structure information of the molten pool; the processed data is subjected to three-dimensional modeling and rendering technology to form a three-dimensional temperature field and internal structure model of the molten pool, and is visualized on a computer screen.

[0010] Another object of the present invention is to provide a cladding quality visualization system integrating infrared thermal imaging and laser ultrasonic technology based on the cladding quality visualization method integrating infrared thermal imaging and laser ultrasonic technology, the system specifically comprising:

[0011] The infrared thermal imaging module, including the infrared thermal imager and the infrared image processing module, measures the temperature of the molten pool surface in real time and obtains the temperature distribution image of the molten pool surface; through the image processing technology, the temperature signal is extracted and used as the feedback signal for controlling the laser power and other parameters;

[0012] The laser ultrasonic module, including a laser excitation source, a laser ultrasonic receiving module, a signal processing module, etc., emits laser pulses to the cooled cladding layer to excite ultrasonic waves; when ultrasonic waves propagate in the cladding layer, they encounter internal defects such as pores and cracks, which will cause reflection and scattering; by receiving and analyzing the reflected ultrasonic signals, the defect information inside the molten pool can be obtained;

[0013] The data processing and visualization module is connected to the infrared thermal imaging module and the laser ultrasonic module. It fuses the temperature information obtained by the infrared thermal imaging module with the defect information obtained by the laser ultrasonic module to generate a comprehensive visualization image of the molten pool quality. This image can simultaneously display the temperature distribution on the molten pool surface and the internal defects, providing operators with intuitive monitoring results.

[0014] Another object of the present invention is to provide a computer device, which includes a memory and a processor, wherein the memory stores a computer program, and when the computer program is executed by the processor, the processor executes the steps of the cladding quality visualization method integrating infrared thermal imaging and laser ultrasonic technology.

[0015] Another object of the present invention is to provide a computer-readable storage medium storing a computer program, which, when executed by a processor, enables the processor to perform the steps of the cladding quality visualization method integrating infrared thermal imaging and laser ultrasonic technology.

[0016] Another object of the present invention is to provide an information data processing terminal, which is used to realize the cladding quality visualization system integrating infrared thermal imaging and laser ultrasonic technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a flow chart of a cladding quality visualization method integrating infrared thermal imaging and laser ultrasonic technology provided by an embodiment of the present invention;

[0018] Figure 2 A structural diagram of a cladding quality visualization system integrating infrared thermal imaging and laser ultrasonic technology in a visualization method provided by an embodiment of the present invention;

[0019] In the figure: 1. Infrared thermal imaging module; 2. Infrared thermal imager; 3. Infrared image processing module; 4. Laser ultrasound module; 5. Laser excitation source; 6. Laser ultrasound receiving module; 7. Signal processing module; 8. Data processing and visualization module. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0021] like Figure 1 As shown, an embodiment of the present invention provides a cladding quality visualization method integrating infrared thermal imaging and laser ultrasonic technology, the method comprising:

[0022] S1, build a molten pool quality monitoring system integrating infrared thermal imaging and laser ultrasonic technology, including infrared thermal imaging module, laser ultrasonic module, data processing and visualization module, etc.;

[0023] S2, the infrared thermal imaging module includes an infrared thermal imager and an infrared image processing module. The infrared thermal imaging module is used to measure the temperature of the molten pool surface in real time to obtain a temperature distribution image of the molten pool surface; the temperature signal is extracted through image processing technology and used as a feedback signal for controlling parameters such as laser power;

[0024] S3, the laser ultrasonic module includes a laser excitation source, a laser ultrasonic receiving module, a signal processing module, etc. The laser ultrasonic module is used to emit laser pulses to the cooled cladding layer to excite ultrasonic waves. When the ultrasonic waves propagate in the cladding layer, they will be reflected and scattered when encountering internal defects such as pores and cracks. By receiving and analyzing the reflected ultrasonic signals, the defect information inside the molten pool can be obtained.

[0025] S4, the data processing and visualization module fuses the temperature information obtained by the infrared thermal imaging module with the defect information obtained by the laser ultrasonic module to generate a comprehensive visualization image of the molten pool quality; this image can simultaneously display the temperature distribution on the molten pool surface and the internal defects, providing operators with intuitive monitoring results.

[0026] The infrared thermal imager in S2 is placed directly at the molten pool, the laser excitation source in S3 is aimed at the cladding layer at a short distance after the molten pool is cooled, and the laser ultrasonic receiving module is placed next to the laser excitation source; during the laser cladding process, the infrared thermal imaging module and the laser ultrasonic module are started at the same time to synchronously detect the molten pool; the infrared thermal imaging data and the laser ultrasonic data are collected and processed in real time to extract the temperature information and internal structure information of the molten pool; the processed data is used through three-dimensional modeling and rendering technology to form a three-dimensional temperature field and internal structure model of the molten pool, and is visualized on the computer screen.

[0027] like Figure 2 As shown, an embodiment of the present invention provides a cladding quality visualization system integrating infrared thermal imaging and laser ultrasonic technology based on the cladding quality visualization method integrating infrared thermal imaging and laser ultrasonic technology, and the system specifically includes:

[0028] The infrared thermal imaging module 1 includes an infrared thermal imager 2 and an infrared image processing module 3, which measures the temperature of the molten pool surface in real time and obtains a temperature distribution image of the molten pool surface; through image processing technology, the temperature signal is extracted and used as a feedback signal for controlling parameters such as laser power;

[0029] The laser ultrasonic module 4, including a laser excitation source 5, a laser ultrasonic receiving module 6, a signal processing module 7, etc., emits laser pulses to the cooled cladding layer to excite ultrasonic waves; when the ultrasonic waves propagate in the cladding layer, they encounter internal defects such as pores and cracks, and reflection and scattering phenomena will occur; by receiving and analyzing the reflected ultrasonic signals, the defect information inside the molten pool can be obtained;

[0030] The data processing and visualization module 8 is connected to the infrared thermal imaging module 1 and the laser ultrasonic module 4, and fuses the temperature information obtained by the infrared thermal imaging module 1 with the defect information obtained by the laser ultrasonic module 4 to generate a comprehensive visualization image of the molten pool quality; the image can simultaneously display the temperature distribution on the molten pool surface and the internal defects, providing intuitive monitoring results for operators.

[0031] An embodiment of the present invention provides a computer device, which includes a memory and a processor. The memory stores a computer program. When the computer program is executed by the processor, the processor executes the steps of the cladding quality visualization method integrating infrared thermal imaging and laser ultrasonic technology.

[0032] An embodiment of the present invention provides a computer-readable storage medium storing a computer program. When the computer program is executed by a processor, the processor executes the steps of the cladding quality visualization method integrating infrared thermal imaging and laser ultrasonic technology.

[0033] An embodiment of the present invention provides an information data processing terminal, which is used to implement the cladding quality visualization system integrating infrared thermal imaging and laser ultrasonic technology.

[0034] It should be noted that the embodiments of the present invention can be implemented by hardware, software, or a combination of software and hardware. The hardware part can be implemented using dedicated logic; the software part can be stored in a memory and executed by an appropriate instruction execution system, such as a microprocessor or dedicated design hardware. It can be understood by a person of ordinary skill in the art that the above-mentioned devices and methods can be implemented using computer executable instructions and / or contained in a processor control code, such as a carrier medium such as a disk, CD or DVD-ROM, a programmable memory such as a read-only memory (firmware), or a data carrier such as an optical or electronic signal carrier. Such code is provided on the carrier medium. The device and its modules of the present invention can be implemented by hardware circuits such as very large-scale integrated circuits or gate arrays, semiconductors such as logic chips, transistors, etc., or programmable hardware devices such as field programmable gate arrays, programmable logic devices, etc., can also be implemented by software executed by various types of processors, and can also be implemented by a combination of the above-mentioned hardware circuits and software, such as firmware.

[0035] The above description is only a specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Any modifications, equivalent substitutions and improvements made by any technician familiar with the technical field within the technical scope disclosed by the present invention and within the spirit and principle of the present invention should be covered by the protection scope of the present invention.

Claims

1. A cladding quality visualization method integrating infrared thermal imaging and laser ultrasonic technology, characterized in that: The method includes: A molten pool quality monitoring system integrating infrared thermal imaging and laser ultrasonic technology is constructed, wherein the system comprises an infrared thermal imaging module, a laser ultrasonic module, and a data processing and visualization module. The molten pool surface is temperature-measured in real time by the infrared thermal imaging module to obtain a temperature distribution image of the molten pool surface, and the temperature signal is extracted as a feedback signal for controlling the laser power. The laser ultrasonic module is used to emit laser pulses to the cooled cladding layer, and the reflected ultrasonic signal is received to obtain the internal defect information of the molten pool. The temperature information and the defect information are fused and processed by the data processing and visualization module to generate a comprehensive visualization image.

2. According to the cladding quality visualization method of claim 1, the infrared thermal imager is directly aimed at the molten pool, the laser excitation source is aimed at the small section of cladding layer after the molten pool has cooled, and the laser ultrasonic receiving module is placed next to the laser excitation source; the infrared thermal imaging module and the laser ultrasonic module are synchronously started during the laser cladding process, and the temperature and internal structure information of the molten pool are collected and processed in real time, and the three-dimensional temperature field and internal structure model of the molten pool are generated and visualized through three-dimensional modeling and rendering technology.

3. According to the cladding quality visualization method of claim 1, the laser ultrasonic module analyzes the reflection phenomenon of ultrasonic waves in the cladding layer through signal processing, detects defects such as pores and cracks, and fuses the acquired defect information with infrared thermal imaging data to generate a visual monitoring image that can simultaneously display the surface temperature distribution of the molten pool and the internal defect conditions.

4. A cladding quality visualization system integrating infrared thermal imaging and laser ultrasonic technology based on the cladding quality visualization method integrating infrared thermal imaging and laser ultrasonic technology as described in claims 1-3, characterized in that: The system specifically includes: The infrared thermal imaging module, including the infrared thermal imager and the infrared image processing module, measures the temperature of the molten pool surface in real time and obtains the temperature distribution image of the molten pool surface; through the image processing technology, the temperature signal is extracted and used as the feedback signal for controlling the laser power and other parameters; The laser ultrasonic module, including a laser excitation source, a laser ultrasonic receiving module, a signal processing module, etc., emits laser pulses to the cooled cladding layer to excite ultrasonic waves; when ultrasonic waves propagate in the cladding layer, they encounter internal defects such as pores and cracks, which will cause reflection and scattering; by receiving and analyzing the reflected ultrasonic signals, the defect information inside the molten pool can be obtained; The data processing and visualization module is connected to the infrared thermal imaging module and the laser ultrasonic module. It fuses the temperature information obtained by the infrared thermal imaging module with the defect information obtained by the laser ultrasonic module to generate a comprehensive visualization image of the molten pool quality. This image can simultaneously display the temperature distribution on the molten pool surface and the internal defects, providing operators with intuitive monitoring results.

5. A computer device, characterized in that: The computer device includes a memory and a processor, the memory stores a computer program, and when the computer program is executed by the processor, the processor executes the steps of the cladding quality visualization method integrating infrared thermal imaging and laser ultrasonic technology as described in any one of claims 1-3.

6. A computer-readable storage medium storing a computer program, wherein when the computer program is executed by a processor, the processor executes the steps of the cladding quality visualization method integrating infrared thermal imaging and laser ultrasonic technology as described in any one of claims 1 to 3.

7. An information data processing terminal, characterized in that: The information data processing terminal is used to realize the cladding quality visualization system integrating infrared thermal imaging and laser ultrasonic technology as described in claim 4.

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