Heat treatment deformation detection method for copper alloy wire

Abstract

The invention discloses a copper alloy wire heat treatment deformation detection method, and relates to the technical field of copper alloy wire detection, and the method comprises the following steps: transmitting a to-be-detected wire; performing laser irradiation and information receiving; processing and analyzing electric signals; real-time self-inspection of the laser measurement equipment is carried out; and vibration correction. According to the heat treatment deformation detection method for the copper alloy wire, an amplitude sensor senses and feeds back amplitude data during shaking, and after the amplitude data is processed, the influence of each vibration amplitude on deformation detection calculation of a wire body can be learned by adopting a neural network and a deep learning model; the influence value caused by each vibration amplitude is substituted into the deformation calculation of the wire rod body, so that the detection part when the wire rod body vibrates can be calculated and corrected, and the situation that the deformation calculation result of the wire rod body is inaccurate and secondary detection is needed due to vibration is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of copper alloy wire material detection, in particular to a method for detecting deformation of a copper alloy wire material during heat treatment. Background Art

[0002] Copper alloy wire heat treatment deformation detection refers to the deformation detection of copper alloy wire after heat treatment. Deformation detection includes length deformation, diameter deformation, shape deformation, curvature deformation, bending deformation and torsional deformation. The commonly used detection method is mainly to use a laser measuring device to emit a laser beam to the surface of the wire, and convert the emitted laser beam into an electrical signal and calculate it to obtain the deformation of the wire. Based on the deformation condition, the production method of the wire is controlled and adjusted to improve the production quality.

[0003] When using laser measuring equipment to detect the deformation of copper alloy wires, vibration factors need to be taken into account, which requires a stable detection environment. However, during the transmission of the wire, transmission rollers and other transmission structures will inevitably vibrate after a long period of time due to reasons such as life, which causes vibration and inaccurate calculation results.

[0004] Therefore, in view of this, the existing structure and defects are studied and improved, and a method for detecting deformation of copper alloy wire during heat treatment is proposed. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a method for detecting deformation of a copper alloy wire during heat treatment, which solves the problems raised in the above-mentioned background technology.

[0006] To achieve the above objectives, the present invention is implemented by the following technical solutions: a method for detecting deformation of a copper alloy wire during heat treatment, the method comprising the following steps:

[0007] Step 1: The wire to be tested is transmitted. The wire body is transmitted through the rotation of the unwinding roller and the winding roller. The transmission of the wire body needs to pass through the detection area, which is the laser beam irradiation area of ​​the laser measuring equipment;

[0008] Step 2: Laser irradiation and information reception. The laser measuring device emits a laser beam and irradiates the surface of the wire body. The laser beam interacts with the surface of the wire body to generate a reflection signal. The laser device receives the reflection signal and converts it into an electrical signal. The laser measuring device is respectively set before and after the heat treatment of the wire body to perform two inspections on the wire body to obtain the original data before the heat treatment of the wire body and the measured data after the heat treatment. Both the original data and the measured data include length, diameter, shape, curvature, bending angle, and torsion angle.

[0009] Step 3: Electrical signal processing and analysis: the electrical signal is processed and analyzed to calculate the three-dimensional coordinate information of the wire surface. The acquired three-dimensional coordinate information is stored as point cloud data. The point cloud data is analyzed and processed to calculate the deformation of the wire body.

[0010] Based on the above description, the length of the wire is obtained by calculating the distances of all points in the point cloud and adding them together;

[0011] By analyzing the shape in the point cloud data, the radius method is used to estimate the diameter by calculating the distance from each point to the center of the wire and averaging the distance;

[0012] By analyzing the distribution and direction of points in the point cloud data, the curve fitting method is used to describe the shape of the wire by fitting the curve;

[0013] By analyzing the curves in the point cloud data, the curvature is estimated by calculating the distance between each point and its neighboring points using the Euclidean distance method;

[0014] By analyzing the curved part in the point cloud data, the angle method is used to estimate the bending angle by calculating the angle between two adjacent line segments;

[0015] By analyzing the rotation part in the point cloud data, the rotation matrix method is used to estimate the torsion angle by calculating the rotation matrix;

[0016] Step 4: The laser measuring device performs real-time self-test. This step is performed simultaneously with step 3. The laser measuring device emits a laser beam to irradiate the wire body in transmission, and simultaneously irradiates the standard block on the side of the wire body in the detection area. The laser beam reflected by the surface of the standard block and the laser beam reflected by the wire body are received and processed separately. If the final calculated deformation result of the standard block is consistent with the preset value, it means that the laser measuring device has passed the self-test. If the final calculated deformation result of the standard block exceeds the threshold, it means that the detection result of the laser measuring device is inaccurate.

[0017] Step 5: Vibration correction: Use the amplitude sensor to detect the vibration amplitude of the wire body in real time when it passes through the detection area. After processing the collected vibration amplitude data, the influence of each vibration amplitude on the detection result is learned through the neural network and deep learning model. The influence value caused by each vibration amplitude is brought into the deformation calculation of the wire body, thereby calculating and correcting the detection part when the wire body vibrates;

[0018] Among them, neural networks and deep learning models are suitable for calculating and correcting vibration effects, including but not limited to CNN models, support vector machines, and convolutional neural network models;

[0019] Taking the CNN model as an example, the specific process is as follows:

[0020] Convert point cloud data into 2D images such as depth maps;

[0021] Vibration features such as vibration amplitude and frequency are used as auxiliary inputs and embedded into high-level features of CNN through a fully connected layer or embedded into the high-level features of CNN;

[0022] Model structure diagram:

[0023] Input 1 is the measurement data:

[0024] Extract spatial features through 2D convolution;

[0025] Multiple convolutional layers + pooling layers gradually extract high-level features;

[0026] Finally, the feature vector is generated through the fully connected layer;

[0027] Input 2 is the vibration characteristic:

[0028] The vibration features are embedded through the fully connected layer to generate a feature vector;

[0029] Feature Fusion:

[0030] The feature vector of the measurement data is concatenated with the vector of the vibration feature to form a joint feature;

[0031] Output layer:

[0032] A fully connected layer is used to regress the joint features and output the corrected measurements.

[0033] Furthermore, in the step 1, the surface of the wire body needs to be clean and free of contamination, oxide scale and other impurities before being transmitted for inspection.

[0034] Furthermore, in step 1, the environment of the detection area needs to remain stable, and adverse factors such as light interference and temperature fluctuations need to be avoided.

[0035] Furthermore, in step 3, the three-dimensional coordinate information is calculated using the following formula:

[0036]

[0037] Among them, x, y and z are the three-dimensional coordinates of the wire surface, r is the radius of the laser beam, and θ is the elevation angle of the laser beam. is the azimuth angle of the laser beam.

[0038] Furthermore, in step three, the deformation includes but is not limited to changes in length, diameter and shape.

[0039] Furthermore, in step 3, the length deformation calculation formula of the wire body is as follows:

[0040] ΔL=L2-L1

[0041] Among them, ΔL is the length deformation, L2 is the measured length, and L1 is the original length;

[0042] The calculation formula for the diameter deformation of the wire body is as follows:

[0043] ΔD=D2-D1

[0044] Among them, ΔD is the diameter deformation, D2 is the measured diameter, and D1 is the original diameter;

[0045] The shape deformation calculation formula of the wire body is as follows:

[0046] ΔS=S2-S1

[0047] Among them, ΔS is the shape deformation, S2 is the measured shape, and S1 is the original shape.

[0048] Furthermore, in step 3, the curvature deformation calculation formula of the wire body is as follows:

[0049] ΔK=K2-K1

[0050] Among them, ΔK is the curvature deformation, K2 is the measured curvature, and K1 is the original curvature;

[0051] The calculation formula for the bending deformation of the wire body is as follows:

[0052] Δθ=θ2-θ1

[0053] Among them, Δθ is the bending deformation, θ2 is the bending angle after measurement, and θ1 is the original bending angle;

[0054] The calculation formula for the torsional deformation of the wire body is as follows:

[0055] Δφ=φ2-φ1

[0056] Among them, Δφ is the torsional deformation, φ2 is the measured torsion angle, and φ1 is the original torsion angle.

[0057] Furthermore, in step 4, the standard block is a reference object whose various parameters are all specified preset values. After the laser beam emitted by the laser measuring device is irradiated to the surface of the standard block and is transmitted, received and processed, the data obtained is consistent with the preset parameters.

[0058] Furthermore, the specific structure of the wire body during transmission in the copper alloy wire heat treatment deformation detection method includes a support frame, an output motor is fixed to the outside of the support frame, and the output end of the output motor is connected to a driving turntable, a driven turntable is provided at the bottom end of the support frame and an end away from the output motor, and a synchronous chain is sleeved on the outer walls of the driven turntable and the driving turntable, a wire body is passed through the upper surface of the synchronous chain, a bonding plate is provided on the top inner side surface of the bonding plate, and an elastic telescopic rod is connected to the middle of the bottom surface of the bonding plate, and an amplitude sensor is provided at the side edge of the bottom surface of the bonding plate.

[0059] Furthermore, one end of the active turntable away from the output motor is connected to a sector gear through a connecting shaft, and a rack carrier is arranged above the sector gear, the rack carrier is slidably connected to the support frame, and a spring telescopic rod is arranged in the middle of the surface of the rack carrier, the spring telescopic rod is fixedly connected to the support frame, a standard block is fixed on the side of the rack carrier surface away from the spring telescopic rod, and the standard block is located in the detection area.

[0060] The present invention provides a method for detecting deformation of a copper alloy wire during heat treatment, which has the following beneficial effects:

[0061] 1. In the copper alloy wire heat treatment deformation detection method, the wire body is attached to the surface of the synchronous chain for transmission, thereby avoiding inaccurate detection results caused by jitter when the wire body is suspended for transmission. When the active turntable and the driven turntable jitter due to life and other reasons, the amplitude sensor senses and feeds back amplitude data. After the amplitude data is processed, a neural network and a deep learning model can be used to learn the influence of each vibration amplitude on the deformation detection calculation of the wire body, thereby bringing the influence value caused by each vibration amplitude into the deformation calculation of the wire body, thereby calculating and correcting the detection position when the wire body vibrates, thereby avoiding the situation where the deformation calculation result of the wire body is inaccurate due to vibration and requires secondary detection.

[0062] 2. The method for detecting deformation of copper alloy wire during heat treatment, when the active turntable rotates, it drives the sector gear to rotate, so that the sector gear indirectly meshes with the rack carrier, and when meshing, the rack carrier slides horizontally to cause the spring telescopic rod to contract, and when the two are separated, the spring telescopic rod extends and resets to cause the rack carrier to slide back, thereby causing the standard block to continuously move back and forth in the detection area, and the laser measuring device emits a laser beam to irradiate the wire body in transmission, and simultaneously irradiates the standard block on the side of the wire body in the detection area, if the final calculated deformation result of the standard block is consistent with the preset value, it indicates that the laser measuring device has passed the self-test, if the final calculated deformation result of the standard block exceeds the threshold, it indicates that the detection result of the laser measuring device is inaccurate, thereby the laser measuring device can be self-checked in real time to avoid inaccurate detection results due to errors in the laser measuring device itself. BRIEF DESCRIPTION OF THE DRAWINGS

[0063] Figure 1 It is a schematic flow chart of a method for detecting deformation of a copper alloy wire during heat treatment according to the present invention;

[0064] Figure 2 It is a schematic diagram of the outer structure of a support frame of a method for detecting deformation of a copper alloy wire during heat treatment according to the present invention;

[0065] Figure 3 It is a schematic diagram of the active turntable structure of a method for detecting deformation of a copper alloy wire during heat treatment according to the present invention;

[0066] Figure 4 It is a schematic diagram of the synchronous chain structure of a method for detecting deformation of a copper alloy wire during heat treatment according to the present invention;

[0067] Figure 5 The present invention is a schematic diagram of a rack carrier structure of a copper alloy wire heat treatment deformation detection method.

[0068] In the figure: 1. Support frame; 2. Output motor; 3. Active turntable; 4. Driven turntable; 5. Synchronous chain; 6. Laminating plate; 7. Elastic telescopic rod; 8. Amplitude sensor; 9. Fan gear; 10. Rack carrier plate; 11. Spring telescopic rod; 12. Standard block. DETAILED DESCRIPTION

[0069] The following embodiments of the present invention are described in further detail in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0070] like Figure 1-Figure 5 As shown, the present invention provides a technical solution: a method for detecting deformation of a copper alloy wire during heat treatment, the method comprising the following steps:

[0071] Step 1: The wire to be tested is transmitted. The wire body is transmitted by the rotation of the unwinding roller and the winding roller. The wire body needs to pass through the detection area, which is the laser beam irradiation area of ​​the laser measuring equipment. Before the wire body is transmitted for testing, it is necessary to ensure that the surface is clean and free of impurities such as oxide scale. The environment of the detection area needs to be kept stable, and adverse factors such as light interference and temperature fluctuations need to be avoided.

[0072] Step 2: Laser irradiation and information reception. The laser measuring device emits a laser beam and irradiates the surface of the wire body. The laser beam interacts with the surface of the wire body to generate a reflection signal. The laser device receives the reflection signal and converts it into an electrical signal. The laser measuring device is respectively set before and after the heat treatment of the wire body to perform two inspections on the wire body to obtain the original data before the heat treatment of the wire body and the measured data after the heat treatment. Both the original data and the measured data include length, diameter, shape, curvature, bending angle, and torsion angle.

[0073] Step 3: Electrical signal processing and analysis: the electrical signal is processed and analyzed to calculate the three-dimensional coordinate information of the wire surface. The acquired three-dimensional coordinate information is stored as point cloud data. The point cloud data is analyzed and processed to calculate the deformation of the wire body.

[0074] Based on the above description, the length of the wire is obtained by calculating the distances of all points in the point cloud and adding them together;

[0075] By analyzing the shape in the point cloud data, the radius method is used to estimate the diameter by calculating the distance from each point to the center of the wire and averaging the distance;

[0076] By analyzing the distribution and direction of points in the point cloud data, the curve fitting method is used to describe the shape of the wire by fitting the curve;

[0077] By analyzing the curves in the point cloud data, the curvature is estimated by calculating the distance between each point and its neighboring points using the Euclidean distance method;

[0078] By analyzing the curved part in the point cloud data, the angle method is used to estimate the bending angle by calculating the angle between two adjacent line segments;

[0079] By analyzing the rotation part in the point cloud data, the rotation matrix method is used to estimate the torsion angle by calculating the rotation matrix. The deformation includes but is not limited to the change of length, diameter and shape. The three-dimensional coordinate information is calculated using the following formula:

[0080]

[0081] Among them, x, y and z are the three-dimensional coordinates of the wire surface, r is the radius of the laser beam, and θ is the elevation angle of the laser beam. is the azimuth angle of the laser beam;

[0082] The length deformation calculation formula of the wire body is as follows:

[0083] ΔL=L2-L1

[0084] Among them, ΔL is the length deformation, L2 is the measured length, and L1 is the original length;

[0085] The calculation formula for the diameter deformation of the wire body is as follows:

[0086] ΔD=D2-D1

[0087] Among them, ΔD is the diameter deformation, D2 is the measured diameter, and D1 is the original diameter;

[0088] The shape deformation calculation formula of the wire body is as follows:

[0089] ΔS=S2-S1

[0090] Among them, ΔS is the shape deformation, S2 is the measured shape, and S1 is the original shape;

[0091] The curvature deformation calculation formula of the wire body is as follows:

[0092] ΔK=K2-K1

[0093] Among them, ΔK is the curvature deformation, K2 is the measured curvature, and K1 is the original curvature;

[0094] The calculation formula for the bending deformation of the wire body is as follows:

[0095] Δθ=θ2-θ1

[0096] Among them, Δθ is the bending deformation, θ2 is the bending angle after measurement, and θ1 is the original bending angle;

[0097] The calculation formula for the torsional deformation of the wire body is as follows:

[0098] Δφ=φ2-φ1

[0099] Among them, Δφ is the torsional deformation, φ2 is the measured torsion angle, and φ1 is the original torsion angle;

[0100] Step 4: Real-time self-test of the laser measuring device. This step is performed simultaneously with step 3. The laser measuring device emits a laser beam to irradiate the wire body in transmission, and simultaneously irradiates the standard block on the side of the wire body in the detection area. The laser beam reflected by the surface of the standard block and the laser beam reflected by the wire body are received and processed separately. If the final calculated deformation result of the standard block is consistent with the preset value, it means that the self-test of the laser measuring device has passed. If the final calculated deformation result of the standard block exceeds the threshold, it means that the detection result of the laser measuring device is inaccurate. The standard block is a reference object with various parameters with specified preset values. After the laser beam emitted by the laser measuring device is irradiated to the surface of the standard block and is emitted, received and data processed, the data obtained is consistent with the preset parameters.

[0101] Step 5: Vibration correction: Use the amplitude sensor to detect the vibration amplitude of the wire body in real time when it passes through the detection area. After processing the collected vibration amplitude data, the influence of each vibration amplitude on the detection result is learned through the neural network and deep learning model. The influence value caused by each vibration amplitude is brought into the deformation calculation of the wire body, thereby calculating and correcting the detection part when the wire body vibrates;

[0102] Among them, neural networks and deep learning models are suitable for calculating and correcting vibration effects, including but not limited to CNN models, support vector machines, and convolutional neural network models;

[0103] Taking the CNN model as an example, the specific process is as follows:

[0104] Convert point cloud data into 2D images such as depth maps;

[0105] Vibration features such as vibration amplitude and frequency are used as auxiliary inputs and embedded into high-level features of CNN through a fully connected layer or embedded into the high-level features of CNN;

[0106] Model structure diagram:

[0107] Input 1 is the measurement data:

[0108] Extract spatial features through 2D convolution;

[0109] Multiple convolutional layers + pooling layers gradually extract high-level features;

[0110] Finally, the feature vector is generated through the fully connected layer;

[0111] Input 2 is the vibration characteristic:

[0112] The vibration features are embedded through the fully connected layer to generate a feature vector;

[0113] Feature Fusion:

[0114] The feature vector of the measurement data is concatenated with the vector of the vibration feature to form a joint feature;

[0115] Output layer:

[0116] A fully connected layer is used to regress the joint features and output the corrected measurements.

[0117] like Figure 2-Figure 5As shown, the specific structure of the wire body during transmission in the copper alloy wire heat treatment deformation detection method includes a support frame 1, an output motor 2 is fixed to the outside of the support frame 1, and the output end of the output motor 2 is connected to a driving turntable 3, the bottom end of the support frame 1 and the end away from the output motor 2 are both provided with a driven turntable 4, and the outer walls of the driven turntable 4 and the driving turntable 3 are both sleeved with a synchronous chain 5, the upper surface of the synchronous chain 5 is penetrated with the wire body, the top inner side surface of the synchronous chain 5 is provided with a bonding plate 6, and the middle of the bottom surface of the bonding plate 6 is connected There is an elastic telescopic rod 7, an amplitude sensor 8 is arranged on the side of the bottom surface of the bonding plate 6, the end of the active turntable 3 away from the output motor 2 is connected to the sector gear 9 through a connecting shaft, and a rack carrier 10 is arranged above the sector gear 9, the rack carrier 10 is slidably connected to the support frame 1, and a spring telescopic rod 11 is arranged in the middle of the surface of the rack carrier 10, the spring telescopic rod 11 is fixedly connected to the support frame 1, and a standard block 12 is fixed on the side of the surface of the rack carrier 10 away from the spring telescopic rod 11, and the standard block 12 is located in the detection area;

[0118] The specific operation is as follows: the wire body is attached to the top surface of the synchronous chain 5 for transmission during transmission. During the process, the output motor 2 drives the active turntable 3 to rotate, so that the synchronous chain 5 is circulated along the outer walls of the active turntable 3 and the driven turntable 4, and the transmission speed of the synchronous chain 5 is consistent with the transmission speed of the wire body, thereby avoiding the wire body from shaking easily during direct suspended transmission. During the transmission of the wire body, it passes through the detection area, and the laser measuring equipment in the detection area performs laser scanning on the surface of the wire body to obtain the deformation of various parts of the wire body. Since the wire body is attached to the surface of the synchronous chain 5 for transmission, the inaccurate detection result caused by the shaking of the wire body during suspended transmission can be avoided, thereby improving the accuracy of the deformation detection result of the wire body after heat treatment in disguised form;

[0119] The synchronous chain 5 between the active turntable 3 and the driven turntable 4 also falls due to being suspended in the air. The elastic force of the elastic telescopic rod 7 enables the laminating plate 6 to support the top of the synchronous chain 5, so that the synchronous chain 5 is horizontally adapted with the wire body. When the active turntable 3 and the driven turntable 4 vibrate due to life or other reasons, the amplitude sensor 8 senses and feeds back the amplitude data. After the amplitude data is processed, a neural network and a deep learning model can be used to learn the influence of each vibration amplitude on the deformation detection calculation of the wire body, thereby bringing the influence value caused by each vibration amplitude into the deformation calculation of the wire body, thereby calculating and correcting the detection part when the wire body vibrates, thereby avoiding the situation where the deformation calculation result of the wire body is inaccurate due to vibration and requires secondary detection.

[0120] When the active turntable 3 rotates, it drives the sector gear 9 to rotate, so that the sector gear 9 indirectly meshes with the rack carrier 10. When meshing, the rack carrier 10 slides horizontally to shrink the spring telescopic rod 11, and when the two are separated, the spring telescopic rod 11 extends and resets to make the rack carrier 10 slide back, thereby making the standard block 12 continuously move back and forth in the detection area, and the laser measuring device emits a laser beam to irradiate the wire body in transmission, and also irradiates the standard block 12 on the side of the wire body in the detection area. The laser beam reflected by the surface of the standard block 12 and the laser beam reflected by the wire body are received and processed separately. If the final calculated deformation result of the standard block 12 is consistent with the preset value, it means that the laser measuring device has passed the self-test. If the final calculated deformation result of the standard block 12 exceeds the threshold, it means that the detection result of the laser measuring device is inaccurate. Therefore, the laser measuring device can be self-checked in real time to avoid inaccurate detection results due to errors in the laser measuring device itself.

[0121] In summary, when the copper alloy wire heat treatment deformation detection method is used, the wire body is firstly transmitted through the rotation of the unwinding roller and the winding roller, and the transmission of the wire body needs to pass through the detection area, which is the laser beam irradiation area of ​​the laser measuring device. Among them, the wire body needs to ensure that the surface is clean and free of pollution, oxide scale and other impurities before transmission for detection, and the environment of the detection area needs to be kept stable, and adverse factors such as light interference and temperature fluctuation need to be avoided;

[0122] The laser measuring device emits a laser beam to irradiate the surface of the wire body. The laser beam interacts with the surface of the wire body to generate a reflection signal. The laser device receives the reflection signal and converts it into an electrical signal. The laser measuring device is respectively set before and after the heat treatment of the wire body to perform two inspections on the wire body to obtain the original data of the wire body before heat treatment and the measured data after heat treatment. The original data and the measured data both include length, diameter, shape, curvature, bending angle, and torsion angle. The electrical signal is processed and analyzed to calculate the three-dimensional coordinate information of the wire surface. The obtained three-dimensional coordinate information is stored as point cloud data. The point cloud data is analyzed and processed to calculate the deformation of the wire body. The deformation includes but is not limited to changes in length, diameter and shape. The three-dimensional coordinate information is calculated using the following formula:

[0123]

[0124] Among them, x, y and z are the three-dimensional coordinates of the wire surface, r is the radius of the laser beam, and θ is the elevation angle of the laser beam. is the azimuth angle of the laser beam;

[0125] The length deformation calculation formula of the wire body is as follows:

[0126] ΔL=L2-L1

[0127] Among them, ΔL is the length deformation, L2 is the measured length, and L1 is the original length;

[0128] The calculation formula for the diameter deformation of the wire body is as follows:

[0129] ΔD=D2-D1

[0130] Among them, ΔD is the diameter deformation, D2 is the measured diameter, and D1 is the original diameter;

[0131] The shape deformation calculation formula of the wire body is as follows:

[0132] ΔS=S2-S1

[0133] Among them, ΔS is the shape deformation, S2 is the measured shape, and S1 is the original shape;

[0134] The curvature deformation calculation formula of the wire body is as follows:

[0135] ΔK=K2-K1

[0136] Among them, ΔK is the curvature deformation, K2 is the measured curvature, and K1 is the original curvature;

[0137] The calculation formula for the bending deformation of the wire body is as follows:

[0138] Δθ=θ2-θ1

[0139] Among them, Δθ is the bending deformation, θ2 is the bending angle after measurement, and θ1 is the original bending angle;

[0140] The calculation formula for the torsional deformation of the wire body is as follows:

[0141] Δφ=φ2-φ1

[0142] Among them, Δφ is the torsional deformation, φ2 is the measured torsion angle, and φ1 is the original torsion angle.

[0143] The embodiments of the present invention are given for the purpose of illustration and description, and are not intended to be exhaustive or to limit the invention to the disclosed forms. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the present invention and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for specific uses.

Claims

1. A method for detecting deformation of a copper alloy wire during heat treatment, characterized in that: The copper alloy wire heat treatment deformation detection method comprises the following steps: Step 1: The wire to be tested is transmitted. The wire body is transmitted through the rotation of the unwinding roller and the winding roller. The transmission of the wire body needs to pass through the detection area, which is the laser beam irradiation area of ​​the laser measuring equipment; Step 2: Laser irradiation and information reception. The laser measuring device emits a laser beam and irradiates the surface of the wire body. The laser beam interacts with the surface of the wire body to generate a reflection signal. The laser device receives the reflection signal and converts it into an electrical signal. The laser measuring device is respectively set before and after the heat treatment of the wire body to perform two inspections on the wire body to obtain the original data before the heat treatment of the wire body and the measured data after the heat treatment. Both the original data and the measured data include length, diameter, shape, curvature, bending angle, and torsion angle. Step 3: Electrical signal processing and analysis: the electrical signal is processed and analyzed to calculate the three-dimensional coordinate information of the wire surface. The acquired three-dimensional coordinate information is stored as point cloud data. The point cloud data is analyzed and processed to calculate the deformation of the wire body. Based on the above description, the length of the wire is obtained by calculating the distances of all points in the point cloud and adding them together; By analyzing the shape in the point cloud data, the radius method is used to estimate the diameter by calculating the distance from each point to the center of the wire and averaging the distance; By analyzing the distribution and direction of points in the point cloud data, the curve fitting method is used to describe the shape of the wire by fitting the curve; By analyzing the curves in the point cloud data, the curvature is estimated by calculating the distance between each point and its neighboring points using the Euclidean distance method; By analyzing the curved part in the point cloud data, the angle method is used to estimate the bending angle by calculating the angle between two adjacent line segments; By analyzing the rotation part in the point cloud data, the rotation matrix method is used to estimate the torsion angle by calculating the rotation matrix; Step 4: The laser measuring device performs real-time self-test. This step is performed simultaneously with step 3. The laser measuring device emits a laser beam to irradiate the wire body in transmission, and simultaneously irradiates the standard block on the side of the wire body in the detection area. The laser beam reflected by the surface of the standard block and the laser beam reflected by the wire body are received and processed separately. If the final calculated deformation result of the standard block is consistent with the preset value, it means that the laser measuring device has passed the self-test. If the final calculated deformation result of the standard block exceeds the threshold, it means that the detection result of the laser measuring device is inaccurate. Step 5: Vibration correction: Use the amplitude sensor to detect the vibration amplitude of the wire body in real time when it passes through the detection area. After processing the collected vibration amplitude data, the influence of each vibration amplitude on the detection result is learned through the neural network and deep learning model. The influence value caused by each vibration amplitude is brought into the deformation calculation of the wire body, thereby calculating and correcting the detection part when the wire body vibrates; Among them, neural networks and deep learning models are suitable for calculating and correcting vibration effects, including but not limited to CNN models, support vector machines, and convolutional neural network models; Taking the CNN model as an example, the specific process is as follows: Convert point cloud data into 2D images such as depth maps; Vibration features such as vibration amplitude and frequency are used as auxiliary inputs and embedded into high-level features of CNN through a fully connected layer or embedded into the high-level features of CNN; Model structure diagram: Input 1 is the measurement data: Extract spatial features through 2D convolution; Multiple convolutional layers + pooling layers gradually extract high-level features; Finally, the feature vector is generated through the fully connected layer; Input 2 is the vibration characteristic: The vibration features are embedded through the fully connected layer to generate a feature vector; Feature Fusion: The feature vector of the measurement data is concatenated with the vector of the vibration feature to form a joint feature; Output layer: A fully connected layer is used to regress the joint features and output the corrected measurements.

2. A method for detecting deformation of a copper alloy wire during heat treatment according to claim 1, characterized in that: In the step 1, the surface of the wire body needs to be clean and free of contamination before being transmitted for inspection.

3. A method for detecting deformation of a copper alloy wire during heat treatment according to claim 1, characterized in that: In step 1, the environment of the detection area needs to avoid light interference and temperature fluctuation.

4. A method for detecting deformation of a copper alloy wire during heat treatment according to claim 1, characterized in that: In step 3, the three-dimensional coordinate information is calculated using the following formula: Among them, x, y and z are the three-dimensional coordinates of the wire surface, r is the radius of the laser beam, and θ is the elevation angle of the laser beam. is the azimuth angle of the laser beam.

5. A method for detecting deformation of a copper alloy wire during heat treatment according to claim 1, characterized in that: In step three, the deformation includes but is not limited to changes in length, diameter and shape.

6. A method for detecting deformation of a copper alloy wire during heat treatment according to claim 1, characterized in that: In step 3, the length deformation calculation formula of the wire body is as follows: ΔL=L2-L1 Among them, ΔL is the length deformation, L2 is the measured length, and L1 is the original length; The calculation formula of the diameter deformation of the wire body is as follows: ΔD=D2-D1 Among them, ΔD is the diameter deformation, D2 is the measured diameter, and D1 is the original diameter; The shape deformation calculation formula of the wire body is as follows: ΔS=S2-S1 Among them, ΔS is the shape deformation, S2 is the measured shape, and S1 is the original shape.

7. A method for detecting deformation of a copper alloy wire during heat treatment according to claim 1, characterized in that: In step 3, the curvature deformation calculation formula of the wire body is as follows: ΔK=K2-K1 Among them, ΔK is the curvature deformation, K2 is the measured curvature, and K1 is the original curvature; The calculation formula for the bending deformation of the wire body is as follows: Δθ=θ2-θ1 Among them, Δθ is the bending deformation, θ2 is the bending angle after measurement, and θ1 is the original bending angle; The calculation formula for the torsional deformation of the wire body is as follows: Δφ=φ2-φ1 Among them, Δφ is the torsional deformation, φ2 is the measured torsion angle, and φ1 is the original torsion angle.

8. A method for detecting deformation of a copper alloy wire during heat treatment according to claim 1, characterized in that: In step 4, the standard block is a reference object with various parameters having preset values. After the laser beam emitted by the laser measuring device is irradiated onto the surface of the standard block and is transmitted, received and processed, the data obtained is consistent with the preset parameters.

9. A method for detecting deformation of a copper alloy wire during heat treatment according to claim 1, characterized in that: The specific structure of the wire body during transmission in the copper alloy wire heat treatment deformation detection method includes a support frame (1), an output motor (2) is fixed on the outer side of the support frame (1), and the output end of the output motor (2) is connected to a driving turntable (3), the bottom end of the support frame (1) and the end away from the output motor (2) are both provided with a driven turntable (4), and the outer walls of the driven turntable (4) and the driving turntable (3) are both sleeved with a synchronous chain (5), the upper surface of the synchronous chain (5) is penetrated by the wire body, the top inner side surface of the synchronous chain (5) is provided with a bonding plate (6), and the middle part of the bottom surface of the bonding plate (6) is connected to an elastic telescopic rod (7), and the side edge of the bottom surface of the bonding plate (6) is provided with an amplitude sensor (8).

10. A method for detecting deformation of a copper alloy wire during heat treatment according to claim 9, characterized in that: The end of the active turntable (3) away from the output motor (2) is connected to a sector gear (9) via a connecting shaft, and a rack carrier (10) is arranged above the sector gear (9), the rack carrier (10) is slidably connected to the support frame (1), and a spring telescopic rod (11) is arranged in the middle of the surface of the rack carrier (10), the spring telescopic rod (11) is fixedly connected to the support frame (1), and a standard block (12) is fixed on the side of the surface of the rack carrier (10) away from the spring telescopic rod (11), and the standard block (12) is located in the detection area.

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