Long-strip-shaped product multi-parameter detection device and method based on machine vision

Abstract

The invention discloses a long-strip-shaped product multi-parameter detection device based on machine vision. The long-strip-shaped product multi-parameter detection device comprises a first conveying assembly, a second conveying assembly and a detection mechanism, wherein the first conveying assembly and the second conveying assembly are used for conveying long-strip-shaped products and arranged at intervals, and the detection mechanism is arranged between the first conveying assembly and the second conveying assembly and used for detecting the long-strip-shaped products. The detection mechanism comprises a detection support, a middle section detection assembly, two end face detection assemblies and a coding assembly, wherein the middle section detection assembly and the two end face detection assemblies are arranged on the detection support, and the coding assembly is connected with the detection support in a swinging mode. The detection scanning directions of the two end face detection assemblies are parallel to the transmission direction and are opposite. The detection device is high in integration degree and small in occupied area; moreover, the device is high in compatibility and adaptation degree for products, is good in universality, can achieve the direct detection of products with different lengths, avoids the reassembly and debugging of equipment, and greatly saves the manpower and material resources.

Description

Technical Field

[0001] The present invention relates to the field of long strip product detection, and more specifically, to a multi-parameter detection device and method for long strip products based on machine vision. Background Art

[0002] Before using the product, it is necessary to conduct parameter testing to ensure the quality and pass rate of the product. For long strip products, the existing testing equipment can often test relatively single parameters or parts. When testing multiple parameters, multiple devices are required to cooperate, resulting in high testing costs. In addition, due to the long length of some long strip products, the testing equipment occupies a large area, which limits the applicable occasions of the testing equipment. In addition, the compatibility and adaptability of the existing testing equipment with the product is not high. When testing long strip products of different lengths, the equipment must be reassembled or debugged, which requires a lot of manpower and material resources. Summary of the invention

[0003] The present invention aims to overcome at least one defect of the above-mentioned prior art and provide a multi-parameter detection device and method for long strip products based on machine vision, which is used to solve the problems that the parameters or parts detected by the detection equipment in the prior art are relatively single, the detection cost is high, the floor space is large, and the compatibility and adaptability with the products is not high.

[0004] The technical solution adopted by the present invention is as follows: A multi-parameter detection device for long strip products based on machine vision, comprising: a first conveying assembly and a second conveying assembly which are used to transport the long strip products and are arranged at intervals, and a detection mechanism which is arranged between the first conveying assembly and the second conveying assembly and is used to detect the long strip products; The detection mechanism comprises a detection bracket and a middle section detection component arranged on the detection bracket, two sets of end face detection components, and a coding component swingably connected to the detection bracket; the detection scanning directions of the two sets of end face detection components are parallel to the transmission direction and the detection scanning directions are opposite; The end face detection assembly includes a first laser profiler and a rangefinder, and a displacement driving member for driving the first laser profiler and the rangefinder to move, wherein the moving directions of the first laser profiler and the rangefinder are perpendicular to the product transmission direction; The middle section detection component includes a plurality of second laser profilers arranged at intervals, the collection ranges of the plurality of second laser profilers cover 360 degrees of the long strip product, and the collection ranges of two adjacent second laser profilers on the long strip product have overlapping areas; The encoding component includes an encoder swivellingly connected to the detection bracket and a detection wheel connected to the output shaft of the encoder, the axial direction of the output shaft is perpendicular to the transmission direction of the long strip product, and the detection wheel is used to contact the long strip product.

[0005] In one embodiment, the second laser profiler is a dual-frequency laser profiler or a multi-frequency laser profiler, and two adjacent second laser profilers use different laser frequencies.

[0006] In one embodiment, two adjacent second laser profilers are located at different latitudes of the elongated product compared to the elongated product.

[0007] In one of the embodiments, the encoding component further includes a swing driving member for driving the encoder to swing.

[0008] In one embodiment, the swing driving member is a telescopic cylinder disposed on the detection bracket and provided with a telescopic rod; the encoder is swingably connected to the detection bracket through a swing arm, and an abutment rod is provided on the telescopic rod, and the abutment rod is located below the swing arm and abuts against the swing arm, and the telescopic direction of the telescopic rod is perpendicular to the swing axis of the swing arm.

[0009] In one embodiment, the swing arm is connected to the abutment rod via a tension spring, and the tension spring is always in a stretched state.

[0010] In one of the embodiments, it further includes a guide rail that slidably cooperates with the detection component; the guiding direction of the guide rail is parallel to the transmission direction.

[0011] In one of the embodiments, the detection bracket is further provided with a high-transmittance dust cover, and a plurality of the second laser profilers are arranged around the high-transmittance dust cover.

[0012] In one of the embodiments, the end face detection assembly includes a mounting box for mounting the first laser profiler and the rangefinder, and the mounting box is connected to the displacement drive member.

[0013] The present technical solution also provides a multi-parameter detection method for long strip products based on machine vision, comprising the following steps: Placing the long strip product to be inspected on the first conveying component; The first conveying assembly is started. When the long strip product moves to a first preset distance, the first laser profiler and the distance meter in the first group of end surface detection assemblies are driven by the displacement driving member to move back and forth, and the distance meter obtains first distance data. When the first end surface of the long strip product is within the depth of field of the first laser profiler, the first conveying assembly stops, and the first end surface data of the long strip product is obtained by the first laser profiler. The first conveying assembly continues to operate, causing the long strip product to move toward the detection mechanism; When the long strip product moves to a position below the encoding assembly, the encoder swings downward to press the detection wheel down and contact the long strip product, and at the same time, multiple second laser profilers operate to obtain mid-section detection data and encoding data; The first conveying component continues to operate and transports the long strip product to the second conveying component; When the long strip product moves to a position away from the bottom of the encoding component, the encoder is lifted upward to lift the detection wheel, and the second plurality of laser profilers stops running at the same time; When the long strip product moves to the second preset distance, the first laser profiler and the rangefinder in the second group of end face detection components are driven by the displacement drive member to move back and forth; the second distance data is obtained by the rangefinder, and when the second end face of the long strip product is within the depth of field of the first laser profiler, the second conveying component stops, and the second end face data of the long strip product is obtained by the first laser profiler.

[0014] Compared with the prior art, the beneficial effects of the present invention include at least: The multi-parameter detection device and method for long strip products based on machine vision in this technical solution can realize automatic detection of various parameters of the end faces of both ends of the long strip products, as well as the circumferential surface (i.e., the middle section) in the axial direction. The detection device of this technical solution has a high degree of integration and occupies a small area. The length of the first conveying assembly and the second conveying assembly can be adjusted according to actual conditions. The area occupied by the detection mechanism can meet the space requirements of most workshops, saving site costs. In addition, the technical solution has a high degree of compatibility and adaptability with products and good universal performance. Even products of different lengths can be directly detected, eliminating the need for reassembly and debugging of equipment, greatly saving manpower and material resources.

[0015] Specifically, the detection device of the present technical solution completes the automatic detection of the long strip products through the cooperation of the first conveying component and the second conveying component, and all the components involved in the detection are integrated on the detection bracket.

[0016] When inspection is required, the long strip product to be inspected is placed on the first conveying component; the first conveying component is started, and when the long strip product moves to the first preset distance, the first laser profiler and the rangefinder in the first group of end face detection components are driven by the displacement drive member to move back and forth, and the back and forth movement direction here is perpendicular to the transmission direction of the long strip product, and the first end face data and the first distance data of the long strip product are obtained by back and forth scanning. After collecting the above data, the first group of end face detection components returns to the initial position, and the first conveying component continues to operate to move the long strip product toward the detection mechanism.

[0017] When the long strip product moves to the position below the encoding component, the encoder swings downward to press the detection wheel down and contact the long strip product. At the same time, multiple second laser profilers operate to obtain mid-section detection data and encoding data; the first conveying component continues to operate and transports the long strip product to the second conveying component.

[0018] When the long strip product moves to a position away from below the encoding component, the encoder is lifted upward to lift the detection wheel, and at the same time, the plurality of second laser profilers stop running.

[0019] When the long strip product moves to the second preset distance, the first laser profiler and the rangefinder in the second group of end face detection components are driven by the displacement drive to move back and forth. The back and forth movement direction here is perpendicular to the transmission direction of the long strip product, and the second end face data and the second distance data of the long strip product are obtained by back and forth scanning; after collecting the above data, the second group of end face detection components returns to the initial position.

[0020] The first end surface data, the middle section detection data, the encoding data, and the second end surface data are processed to obtain corresponding parameter data. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic structural diagram of the multi-parameter detection device for long strip products based on machine vision described in Example 1 of the present invention.

[0022] Figure 2 This is a schematic diagram of the structure of the detection mechanism described in Example 1 of the present invention.

[0023] Figure 3 This is a schematic diagram of the internal structure of the detection mechanism described in Example 1 of the present invention.

[0024] Figure 4 This is a schematic diagram of the structure of the encoding component described in Example 1 of the present invention.

[0025] Figure numerals: 10, first conveying assembly; 20, second conveying assembly; 30, detection mechanism; 31, detection bracket; 32, middle section detection assembly; 321, second laser profiler; 33, end face detection assembly; 331, first laser profiler; 332, rangefinder; 333, installation box; 334, displacement drive member; 34, encoding assembly; 341, encoder; 342, detection wheel; 343, swing drive member; 3431, telescopic cylinder; 3432, telescopic rod; 3433, abutment rod; 344, swing arm; 345, tension spring; 40, long strip product; 50, guide rail; 60, high-transmittance dust cover. DETAILED DESCRIPTION

[0026] The drawings of the present invention are only for illustrative purposes and should not be construed as limiting the present invention. In order to better illustrate the following embodiments, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product; it is understandable to those skilled in the art that some well-known structures and their descriptions in the drawings may be omitted.

[0027] Example 1

[0028] like Figure 1-Figure 4 The multi-parameter detection device for long-shaped products based on machine vision shown in the figure includes: a first conveying component 10 and a second conveying component 20 which are arranged at intervals for transmitting long-shaped products 40, and a detection mechanism 30 which is arranged between the first conveying component 10 and the second conveying component 20 and is used to detect the long-shaped products 40.

[0029] The detection mechanism 30 includes a detection bracket 31 and a middle section detection component 32 arranged on the detection bracket 31, two groups of end face detection components 33, and an encoding component 34 swingably connected to the detection bracket 31; the detection scanning directions of the two groups of end face detection components 33 are parallel to the transmission direction and the detection scanning directions are opposite.

[0030] The end face detection assembly 33 includes a first laser profiler 331 and a rangefinder 332 , and a displacement driver 334 for driving the first laser profiler 331 and the rangefinder 332 to move. Here, the moving directions of the first laser profiler 331 and the rangefinder 332 are perpendicular to the product transmission direction.

[0031] The middle section detection component 32 includes a plurality of second laser profilers 321 arranged at angular intervals, and the collection range of the plurality of second laser profilers 321 covers 360 degrees of the long strip product 40, and there is an overlapping area between the collection ranges of two adjacent second laser profilers 321 on the long strip product 40; since the image range that needs to be captured by the plurality of second laser profilers 321 needs to cover 360 degrees of the long strip product 40, the collection range of the two adjacent second laser profilers 321 on the long strip product 40 is set to have an overlapping area, so that the images collected by different second laser profilers 321 can be spliced ​​without omission, thereby achieving 360-degree high-precision splicing. In addition, since the collection range of the two adjacent second laser profilers 321 on the long strip product 40 is set to have an overlapping area, the overlapping area is the intersection area in the coordinates. The data collected by the two adjacent second laser profilers 321 can be integrated and converted into the same coordinate system through an algorithm, and the data integration is performed two by two, so that the data coordinate system collected by each second laser profiler 321 in the middle section detection component 32 is in the same coordinate system, thereby improving the accuracy and efficiency of data processing.

[0032] like Figure 4 As shown, the encoding component 34 includes an encoder 341 swingably connected to the detection bracket 31 and a detection wheel 342 connected to the output shaft of the encoder 341, the axial direction of the output shaft is perpendicular to the transmission direction of the long strip product 40, and the detection wheel 342 is used to contact the long strip product 40. When the long strip product 40 moves, the detection wheel 342 rotates along the output shaft, so that the encoder 341 connected to the detection wheel 342 can obtain the encoding data, accurately obtain the moving distance of the long strip product 40, and integrate the encoding data collected by the encoder 341 with the image data collected by the second laser profiler 321 for data analysis, so as to obtain the three-dimensional information of the long strip product 40 and accurately obtain the detection parameters of the long strip product 40 at different positions or within a certain length.

[0033] The multi-parameter detection device and method for long strip products based on machine vision in this embodiment can realize automatic detection of various parameters of the end faces of both ends of the long strip product 40, as well as the circumferential surface (i.e., the middle section) in the axial direction. The detection device of this embodiment has a high degree of integration and a small footprint. The lengths of the first conveying assembly 10 and the second conveying assembly 20 can be adjusted according to actual conditions. The footprint of the detection mechanism 30 can meet the space requirements of most workshops, saving site costs. In addition, the present embodiment has a high degree of compatibility and adaptability with products and good universal performance. Even products of different lengths can be directly detected, eliminating the need for reassembly and debugging of equipment, greatly saving manpower and material resources.

[0034] Specifically, the detection device of this embodiment completes the automatic detection of the long strip product 40 through the cooperation of the first conveying component 10 and the second conveying component 20, and all the components involved in the detection are integrated on the detection bracket 31.

[0035] In this embodiment, the first conveying assembly 10 and the second conveying assembly 20 are conveying rollers. In other embodiments, the first conveying assembly 10 and the second conveying assembly 20 may be conveyor belts or other conveying forms.

[0036] When inspection is required, the long strip product 40 to be inspected is placed on the first conveying component 10; the first conveying component 10 is started, and when the long strip product 40 moves to the first preset distance, the first laser profiler 331 and the rangefinder 332 in the first group of end face detection components 33 are driven by the displacement drive 334 to move back and forth, and the back and forth movement direction here is perpendicular to the transmission direction of the long strip product 40, and the first end face data and the first distance data of the long strip product 40 are obtained by back and forth scanning; after collecting the above data, the first group of end face detection components 33 returns to the initial position, and the first conveying component 10 continues to operate, so that the long strip product 40 moves toward the detection mechanism 30.

[0037] When the long strip product 40 moves to the position below the encoding component 34, the encoder 341 swings downward to press the detection wheel 342 down and contact the long strip product 40, and at the same time, multiple second laser profilers 321 operate to obtain mid-section detection data and encoding data; the first conveying component 10 continues to operate and transports the long strip product 40 to the second conveying component 20.

[0038] When the long strip product 40 moves to a position away from below the encoding assembly 34, the encoder 341 is lifted upward to lift the detection wheel 342, and at the same time, the plurality of second laser profilers 321 stop running.

[0039] When the long strip product 40 moves to the second preset distance, the first laser profiler 331 and the rangefinder 332 in the second group of end face detection components 33 are driven by the displacement driver 334 to move back and forth. The back and forth movement direction is perpendicular to the transmission direction of the long strip product 40, and the second end face data and the second distance data of the long strip product 40 are obtained by back and forth scanning; after collecting the above data, the second group of end face detection components 33 return to the initial position.

[0040] The first end surface data, the first distance data, the middle section detection data, the encoding data, the second end surface data, and the second distance data are processed to obtain corresponding parameter data.

[0041] The two groups of end face detection components 33 in this embodiment have the same structure and are respectively used to detect the end faces of both ends of the long strip product 40. Specifically, each group of the end face detection components 33 includes a mounting box 333 for mounting the first laser profiler 331 and the rangefinder 332, and the mounting box 333 is connected to the displacement driving member 334. The displacement driving member 334 drives the mounting box 333 to move so that the first laser profiler 331 and the rangefinder 332 move synchronously.

[0042] Since the detection scanning directions of the two groups of end surface detection components 33 are opposite and parallel to the transmission direction, the scanning directions of the two groups of end surface detection components 33 can be set to be opposite or opposite. In this embodiment, the scanning directions of the two groups of end surface detection components 33 are set to be opposite, that is, the first group of end surface detection components 33 scans facing the first conveying component 10, and the second group of end surface detection components 33 scans facing the second conveying component 20, so that image data of the end surfaces of the long strip product 40 can be obtained. Specifically, in this embodiment, the two groups of end surface detection components 33 are respectively arranged on two opposite sides of the detection bracket 31.

[0043] The rangefinder 332 and the first laser profiler 331 of this embodiment are located on the same plane, so that the rangefinder 332 can obtain the distance between the first laser profiler 331 and the end face of the long strip product 40, ensuring that the end face of the long strip product 40 is within the depth of field of the first laser profiler 331, making data collection more reliable and preventing invalid collection.

[0044] In this embodiment, the displacement driving member 334 drives the installation box 333 to move up and down to collect data. In other embodiments, the displacement driving member 334 can also be set to drive the installation box 333 to move left and right to collect data according to the situation.

[0045] The displacement driving member 334 described in this embodiment can be in the form of a motor-driven screw-nut pair or a motor-driven synchronous belt and a slider, or other forms that can drive to form a linear displacement.

[0046] Specifically, when the long strip product 40 is conveyed, the installation box 333 can be driven to move up and down to facilitate data collection of the rangefinder 332 and the first laser profiler 331, and the end face distance data is obtained through the rangefinder 332. When it is detected that the end face to be detected of the long strip product 40 is within the depth of field of the first laser profiler 331, that is, when the distance data detected by the rangefinder 332 is within the depth of field, the first conveying component 10 or the second conveying component 20 stops, and the first laser profiler 331 on the corresponding side is operated to collect the end face data. When the distance data detected by the rangefinder 332 is outside the depth of field, the end face to be detected of the long strip product 40 is transported close to the end face detection component 33 on the corresponding side by the first conveying component 10 or the second conveying component 20, so that the end face to be detected is within the depth of field of the first laser profiler 331.

[0047] The rangefinder 332 described in this embodiment is a laser rangefinder, and other rangefinders may be used in other embodiments.

[0048] Since there is an overlapping area in the acquisition range of two adjacent second laser profilers 321 in this embodiment, there is a possibility that the laser lines of the two adjacent second laser profilers 321 are confused, which affects the acquisition accuracy. Therefore, in this embodiment, the second laser profiler 321 is a dual-frequency laser profiler or a multi-frequency laser profiler, and the laser frequencies used by the two adjacent second laser profilers 321 are different, so as to avoid the confusion of data acquisition caused by the confusion of the laser lines of the two adjacent second laser profilers 321. For example, the two adjacent second laser profilers 321 can respectively use a laser profiler with a blue light wavelength and a laser profiler with a red light wavelength. Due to the different frequencies, that is, different wavelengths, the laser lines are different, and the laser lines of the two adjacent second laser profilers 321 are distinguished. Each laser profiler only collects the data of the corresponding laser line, so as to achieve one-to-one precise matching and ensure the accuracy of the data.

[0049] The encoding assembly 34 of this embodiment further includes a swinging driving member 343 for driving the encoder 341 to swing. When the long strip product 40 moves to a position below the encoding assembly 34, the swinging driving member 343 drives the encoder 341 to swing downward so that the detection wheel 342 is pressed down and contacts the long strip product 40, and cooperates with the collection of multiple second laser profilers 321 to obtain the middle section detection data and encoding data. Conversely, when the long strip product 40 moves to a position away from the bottom of the encoding assembly 34, the swinging driving member 343 drives the encoder 341 to lift up so that the detection wheel 342 is lifted up, and the multiple second laser profilers 321 stop running at the same time. The swinging driving member 343 realizes the automatic pressing down and lifting of the encoder 341, and realizes the automatic collection of encoding data.

[0050] In this embodiment, a position sensor such as a photoelectric switch can be used to sense whether the long strip product 40 is located below the encoding component 34, and the signal is communicated with the swing driving component 343 to achieve timely driving of the swing driving component 343.

[0051] Specifically, the swing driving member 343 of this embodiment is a telescopic cylinder 3431 provided on the detection bracket 31 and provided with a telescopic rod 3432; the encoder 341 is swingably connected to the detection bracket 31 through a swing arm 344, and a contact rod 3433 is provided on the telescopic rod 3432, and the contact rod 3433 is located below the swing arm 344 and abuts against the swing arm 344, and the telescopic direction of the telescopic rod 3432 is perpendicular to the swing axis of the swing arm 344. In the initial position, the telescopic rod 3432 is in an extended state, and the contact rod 3433 is located below the swing arm 344 and close to the detection wheel 342, and the detection wheel 342 is lifted upward under the support of the contact rod 3433. When it is necessary to press down the detection wheel 342 to make it contact with the long strip product 40, the telescopic cylinder 3431 drives the telescopic rod 3432 to contract, and the abutment rod 3433 moves in the direction away from the detection wheel 342, that is, the abutment rod 3433 moves toward the swing axis, and after the swing arm 344 loses the support at the far end, it swings downward along the swing axis, driving the detection wheel 342 to be pressed down.

[0052] In order to ensure that the abutment rod 3433 and the swing arm 344 are always in abutment contact, and to ensure the reliability of lifting and pressing down the detection wheel 342, the swing arm 344 and the abutment rod 3433 are connected by a tension spring 345 in this embodiment, and the tension spring 345 is always in a tensioned state, so that the abutment rod 3433 is always in abutment with the swing arm 344. In addition, the tension force of the tension spring 345 in this embodiment has at least a component force parallel to the extension direction of the telescopic rod 3432, so that the tension spring 345 can also guide the movement of the abutment rod 3433.

[0053] As mentioned above, when the distance data detected by the rangefinder 332 is outside the depth of field, the end face to be detected of the long strip product 40 is transported close to the corresponding side end face detection component 33 through the first conveying component 10 or the second conveying component 20, so that the end face to be detected is located within the depth of field of the first laser profiler 331 on the corresponding side. At this time, the position of the long strip product 40 is flexibly adjusted by the first conveying component 10 or the second conveying component 20 to ensure the acquisition accuracy.

[0054] The present embodiment also includes a guide rail 50 that is slidably matched with the detection component; the guiding direction of the guide rail 50 is parallel to the transmission direction. Therefore, the position of the detection mechanism 30 can be selectively adjusted to make the collection more accurate and improve the fault tolerance of the detection device. For example, when the distance data detected by the rangefinder 332 is outside the depth of field, the detection mechanism 30 can be adjusted to move along the guide rail 50 so that it moves close to the long strip product 40, so that the end face to be detected and collected is located within the depth of field of the first laser profiler 331 on the corresponding side. In addition, by setting the guide rail 50, the detection mechanism 30 can also be moved back and forth to focus on or repeatedly collect certain special parts of the product to improve the reliability of the collected data.

[0055] The movement of the detection mechanism 30 on the guide rail 50 of this embodiment can be driven by the combination of a gear rack and a driving motor.

[0056] Considering that the environment of some workshops is not good and the dust is heavy, the detection bracket 31 described in this embodiment is also provided with a high-transmittance dust cover 60, and multiple second laser profilers 321 are arranged around the high-transmittance dust cover 60. When the long strip product 40 is transported to the detection bracket 31 for mid-section inspection, some dust will be brought in. If the high-transmittance dust cover 60 is not provided, the dust will be raised and affect the clarity of the camera lens of the second laser profiler 321. If the dust is wiped off, the second laser profiler 321 will be touched during the erasing process, which will cause partial movement or rotation, resulting in instrument coordinate errors, or affecting the acquisition range, thereby affecting the acquisition accuracy.

[0057] By providing the high-transmittance dust cover 60, dust can be prevented from being raised and dust cleaning can be facilitated. That is, only the dust on the high-transmittance dust cover 60 needs to be wiped off, and each second laser profiler 321 does not need to be cleaned, which is not only efficient but also avoids instrument errors caused by dust erasing.

[0058] The high-transmittance dust cover 60 can be a high-transmittance glass plate or a high-transmittance plastic plate.

[0059] This embodiment also provides a multi-parameter detection method for a long strip product 40 based on machine vision, comprising the following steps: Place the long strip product 40 to be inspected on the first conveying assembly 10; The first conveying assembly 10 is started. When the long strip product 40 moves to the first preset distance, the first laser profiler 331 and the rangefinder 332 in the first group of end face detection assemblies are driven by the displacement driving member 334 to move back and forth, and the first distance data is acquired by the group of rangefinders 332. When the first end face of the long strip product 40 is located within the depth of field of the first laser profiler 331 of the group, the first conveying assembly 10 is stopped, and the first end face data of the long strip product 40 is acquired by the first laser profiler 331. When the first end face of the long strip product 40 is outside the depth of field of the first laser profiler 331 of the group, the first conveying assembly 10 is operated or the position of the detection mechanism 30 is adjusted so that the first end face of the long strip product 40 is located within the depth of field of the first laser profiler 331 of the group and then data acquisition is performed. After completing the above data collection, the first set of end face detection components returns to the initial position; The first conveying assembly 10 continues to operate, so that the long strip product 40 moves toward the detection mechanism 30; When the long strip product 40 moves to the position below the encoding assembly 34, the encoder 341 swings downward to make the detection wheel 342 press down and contact the long strip product 40, and at the same time, the plurality of second laser profilers 321 operate to obtain the middle section detection data and encoding data; The first conveying assembly 10 continues to operate and transports the long strip product 40 to the second conveying assembly 20; When the long strip product 40 moves to a position away from the bottom of the encoding assembly 34, the encoder 341 is lifted upward to lift the detection wheel 342, and the plurality of second laser profilers 321 stop running; When the long strip product 40 moves to the second preset distance, the first laser profiler 331 and the rangefinder 332 in the second group of end face detection components are driven by the displacement driving member 334 to move back and forth; the second distance data is obtained by the group of rangefinders 332, and when the second end face of the long strip product 40 is located within the depth of field of the first laser profiler 331, the second conveying component 20 stops, and the second end face data of the long strip product 40 is obtained by the group of first laser profilers 331; when the second end face of the long strip product 40 is outside the depth of field of the first laser profiler 331, the second conveying component 20 is operated or the position of the detection mechanism 30 is adjusted to make the second end face of the long strip product 40 within the depth of field of the first laser profiler 331 and then data collection is performed; After collecting the above data, the second set of end face detection components returns to the initial position; The first end surface data, the middle section detection data, the encoding data, and the second end surface data are processed to obtain corresponding parameter data.

[0060] Example 2

[0061] The structure and principle of this embodiment are similar to those of the first embodiment, except that, in this embodiment, two adjacent second laser profilers 321 are located at different latitudes of the long strip product 40, that is, the projections of the two adjacent second laser profilers 321 on the long strip product 40 are located at different latitudes of the long strip product 40, so that the second laser profiler 321 can be a single-frequency laser profiler. That is, by setting the two adjacent second laser profilers 321 at different latitudes, the laser lines emitted by the two adjacent second laser profilers 321 can be sufficiently identified and distinguished without confusion. The different latitudes here can be understood as the two adjacent second laser profilers 321 being arranged in a staggered manner or the two adjacent laser profilers being arranged one after the other in the length direction of the long strip product 40, so as to avoid data collection confusion caused by laser line confusion.

[0062] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the technical solution of the present invention, and are not intended to limit the specific implementation methods of the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the claims of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A multi-parameter detection device for long strip products based on machine vision, characterized in that: include: A first conveying assembly and a second conveying assembly arranged at intervals for conveying the long strip products along the conveying direction, and a detection mechanism arranged between the first conveying assembly and the second conveying assembly and for detecting the long strip products; The detection mechanism comprises a detection bracket and a middle section detection component arranged on the detection bracket, two sets of end face detection components and a coding component swingably connected to the detection bracket; the detection scanning direction of the two sets of end face detection components is parallel to the transmission direction; The end face detection assembly includes a first end face detection assembly and a second end face detection assembly, and the first end face detection assembly and the second end face detection assembly each include a first laser profiler, a rangefinder, and a displacement driving member for driving the first laser profiler and the rangefinder to move; The middle section detection component includes a plurality of second laser profilers. When observed along the transmission direction, the plurality of second laser profilers are distributed around the long strip product and the collection range covers 360 degrees of the long strip product, and the collection ranges of two adjacent second laser profilers on the long strip product have overlapping areas; The encoding component includes an encoder oscillatingly connected to the detection bracket and a detection wheel connected to the output shaft of the encoder, the axial direction of the output shaft is perpendicular to the transmission direction of the long strip product, and the detection wheel can contact the long strip product by swinging.

2. The multi-parameter detection device for long strip products based on machine vision according to claim 1 is characterized in that: The second laser profiler is a dual-frequency laser profiler or a multi-frequency laser profiler, and two adjacent second laser profilers use different laser frequencies.

3. The multi-parameter detection device for long strip products based on machine vision according to claim 1, characterized in that: Two adjacent second laser profilers are located at different latitudes of the long strip product compared to the long strip product.

4. The multi-parameter detection device for long strip products based on machine vision according to claim 1, characterized in that: The encoding component also includes a swing driving member for driving the encoder to swing.

5. The multi-parameter detection device for long strip products based on machine vision according to claim 4 is characterized in that: The swing driving member is a telescopic cylinder arranged on the detection bracket and provided with a telescopic rod; the encoder is swingably connected to the detection bracket through a swing arm, and an abutment rod is provided on the telescopic rod, and the abutment rod is located below the swing arm and abuts against the swing arm, and the telescopic direction of the telescopic rod is perpendicular to the swing axis of the swing arm.

6. The multi-parameter detection device for long strip products based on machine vision according to claim 5, characterized in that: The swing arm is connected to the abutment rod via a tension spring, and the tension spring is always in a stretched state.

7. The multi-parameter detection device for long strip products based on machine vision according to any one of claims 1 to 6, characterized in that: It also includes a guide rail that slidably cooperates with the detection component; the guiding direction of the guide rail is parallel to the transmission direction.

8. The multi-parameter detection device for long strip products based on machine vision according to any one of claims 1 to 6, characterized in that: The detection bracket is also provided with a high-transmittance dust cover, and a plurality of the second laser profilers are arranged around the high-transmittance dust cover.

9. The multi-parameter detection device for long strip products based on machine vision according to any one of claims 1 to 6, characterized in that: The first end face detection assembly and the second end face detection assembly also include a mounting box for mounting the first laser profiler and the rangefinder, and the mounting box is connected to the displacement driving member.

10. A multi-parameter detection method for long strip products based on machine vision, characterized in that: The steps include: Placing the long strip product to be inspected on the first conveying component; The first conveying assembly is started. When the long strip product moves to a first preset distance, the first laser profiler and the distance meter in the first group of end surface detection assemblies are driven by the displacement driving member to move up and down, and the distance meter of the first end surface detection assembly obtains first distance data. When the first end surface of the long strip product is within the depth of field of the first laser profiler of the first end surface assembly, the first conveying assembly is stopped, and the first end surface data of the long strip product is obtained by the first laser profiler of the first end surface assembly. The first conveying assembly continues to operate, causing the long strip product to move toward the detection mechanism; When the long strip product moves to a position below the encoding assembly, the encoder swings downward to press the detection wheel down and contact the long strip product, and at the same time, multiple second laser profilers operate to obtain mid-section detection data and encoding data; The first conveying component continues to operate and transports the long strip product to the second conveying component; When the long strip product moves to a position away from the bottom of the encoding component, the encoder is lifted upward to lift the detection wheel, and the second plurality of laser profilers stop running at the same time; When the long strip product moves to a second preset distance, the first laser profiler and the rangefinder in the second group of end face detection components are driven up and down by the displacement drive member; the second distance data is obtained by the rangefinder of the second end face detection component, and when the second end face of the long strip product is within the depth of field of the first laser profiler, the second conveying component stops, and the second end face data of the long strip product is obtained by the first laser profiler of the second end face detection component.

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