An automatic inspection and calibration system and method thereof

Abstract

The application discloses an automatic inspection and calibration system and method, and relates to the technical field of industrial automation and quality control. The system comprises a calibration sample hole disc, which is provided with micro-holes and used for simulating pinhole defects on a strip surface; a sample hole disc driving device is arranged at the bottom of a pinhole detection device, and the sample hole disc driving device can drive the calibration sample hole disc to move to a position where the strip pinhole detection is located; a pinhole detection visual detection device is arranged on the pinhole detection device, and the pinhole detection visual detection device can collect the micro-holes on the calibration sample hole disc; and a data processing and control system can receive image signals of the pinhole detection visual detection device, and perform image processing, analysis and pinhole detection device inspection and calibration. The automatic inspection and calibration system and the automatic inspection and calibration method thereof can automatically calibrate pinhole detection device detection parameters.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of industrial automation and quality control, in particular to an automatic point inspection and calibration system and method thereof. BACKGROUND

[0002] In the production process of aluminum foil and other strip materials, a pinhole detection device is an indispensable quality detection tool, which can monitor the pinhole defects on the surface of the strip material in real time to ensure product quality.

[0003] However, the pinhole detection device itself may also cause detection accuracy to decrease or malfunction due to long-term use, environmental factors or equipment aging, and even cause false detection or missed detection. Therefore, it is urgent to design a technical solution that can automatically calibrate the detection parameters of the pinhole detection device. SUMMARY

[0004] The purpose of the present application is to provide an automatic point inspection and calibration system and method to solve the problems existing in the prior art and automatically calibrate the detection parameters of the pinhole detection device.

[0005] To achieve the above purpose, the present application provides the following solutions:

[0006] The present application provides an automatic point inspection and calibration system, comprising:

[0007] A calibration sample hole disc is provided with micro-holes for simulating pinhole defects on the surface of the strip material;

[0008] A sample hole disc driving device is arranged at the bottom of the pinhole detection device and can drive the calibration sample hole disc to move to the position where the strip material pinhole is detected;

[0009] A pinhole detection visual detection device is arranged on the pinhole detection device and can collect the micro-holes on the calibration sample hole disc;

[0010] A data processing and control system can receive the image signal of the pinhole detection visual detection device and perform image processing, analysis and point inspection and calibration of the pinhole detection device.

[0011] The present application aims to confirm whether the current state of the pinhole detection device is normal, and to update the internal parameters of the pinhole detection device when the related factors of the pinhole detection device change.

[0012] In terms of point inspection, the present application comprehensively checks the detection measurement range, detection signal state, detection capability, detection performance index and consistency of repeated detection results of physical detection of the pinhole detection device. Through this series of checks, it is ensured that the pinhole detection device functions normally and meets the design requirements.

[0013] In the aspect of calibration, the present application confirms the lateral pixel proportion parameter of the pinhole detection device, and calculates the two-dimensional projection of the non-actual corresponding light spot of the micro target, so as to obtain the deviation between the lateral and longitudinal measurement size of the micro hole target on the calibration sample hole disc and the actual size. The calculation is based on a processing computer, which is a mature technology and will not be described here. At the same time, the present application also calculates and corrects the measurement deviation of the micro hole area (especially the non-occupied state in the edge pixel). In addition, when multiple cameras are jointly applied, the system can calculate and correct the overlap amount of the measurement area. In particular, for the case that the measured micro hole target is smaller than one pixel, the system can process the light spot projection mapping and calibrate and correct the related calculation parameters such as the length, width and area of the micro hole target.

[0014] The automatic inspection and calibration system of the present application ensures the accuracy and reliability of the pinhole detection device through the two functions of inspection and calibration, and improves the accuracy and stability of the online detection process.

[0015] Preferably, the sample hole disc driving device comprises a lifting module, an access module is arranged on the lifting module, and the calibration sample hole disc is horizontally arranged on the access module; the lifting module can lift the access module and the calibration sample hole disc to the level of the strip; the access module can drive the calibration sample hole disc to horizontally move to the pinhole detection position of the strip; a rotating motor is arranged at the bottom of the calibration sample hole disc, and the rotating motor can drive the calibration sample hole disc to rotate.

[0016] Preferably, a horizontal moving linear module is further arranged, a horizontal guide rail is arranged at the bottom of the pinhole detection device, the horizontal moving linear module is movably connected to the horizontal guide rail, and the lifting module is arranged on the horizontal moving linear module; the horizontal moving linear module can drive the lifting module, the access module and the calibration sample hole disc to move at a constant speed along the axis direction of the strip conveying roller.

[0017] Preferably, the lifting module comprises a first guide rail plate connected to the horizontal linear moving module, a first linear guide rail is vertically arranged on the outer side of the first guide rail plate, a first sliding block is arranged on the first linear guide rail, and the first sliding block is connected to the access module on the outer side; a first driving motor is arranged on the first guide rail plate, and the first driving motor is used to drive the first sliding block to move up and down along the first linear guide rail.

[0018] Preferably, the access module comprises a second guide rail plate fixedly connected to the first sliding block, a second linear guide rail is horizontally arranged on the top of the second guide rail plate, a second sliding block is arranged on the second linear guide rail, and the second sliding block is connected to the calibration sample hole disc on the top; a second driving motor is arranged on the second guide rail plate, and the second driving motor is used to drive the second sliding block to move horizontally forward and backward along the second linear guide rail.

[0019] Preferably, the pinhole detection device comprises a mounting frame, both ends of the mounting frame are provided with strip material conveying rollers, one end of one of the strip material conveying rollers is provided with a synchronous encoder wheel above, and the synchronous encoder wheel is connected with an encoder; the mounting frame comprises a left side plate and a right side plate, and the left side plate and the right side plate are connected through a top plate above.

[0020] Preferably, the pinhole detection visual detection device comprises a camera and a light source; the camera is arranged on the top plate, the left side plate is connected with a left light source adjusting plate at the bottom, the right side plate is provided with a right light source adjusting plate at the bottom, the light source is horizontally arranged between the left light source adjusting plate and the right light source adjusting plate, and the light source is located below the strip material pinhole detection position.

[0021] Preferably, the data processing and control system comprises a data line acquisition card, a processing computer and the encoder; the data line acquisition card can receive the image signal of the camera, the processing computer can perform image processing and analysis, and can perform pinhole detection device point inspection and calibration according to the image aperture measurement value.

[0022] Preferably, the processing computer can automatically judge the outer boundary of the imaging of the calibration sample hole disc, and can perform flat field correction according to the signal state; and the processing computer can automatically eliminate interference signals.

[0023] The application also provides an automatic point inspection and calibration method, comprising the following steps:

[0024] Step one, system starting and initialization;

[0025] Step two, entering the automatic point inspection and calibration state; when the pinhole detection device reaches the point inspection and maintenance cycle time point, or the operator finds that it has an abnormal situation reaction, the automatic or manual switching to the automatic point inspection and calibration state; the strip material is automatically withdrawn from the production area to make space for the calibration sample hole disc;

[0026] Step three, the sample hole disc driving device moves the calibration sample hole disc to the position where the strip material pinhole detection is located;

[0027] Step four, the calibration sample hole disc rotates to simulate the straight line conveying state of the strip material, and the camera collects images;

[0028] Step five, image processing and analysis; the processing computer receives the image signal of the camera, performs image processing and analysis, calculates the aperture size of the micro hole through an algorithm, and compares the aperture size with the actual size;

[0029] Step six, parameter adjustment and calibration; if the aperture measurement deviation is found to be out of range, the aperture measurement parameter is automatically or manually adjusted; the steps of image collection, processing and analysis are repeated until the aperture measurement deviation is within the allowable range;

[0030] Step seven, lateral movement and multi-point detection; the lateral movement linear module is started, and the calibration sample hole disc is driven to move uniformly along the center direction of the material conveying roller, in the moving process, steps four to six are repeated at different position points according to the set interval;

[0031] Step eight, system reset and state switching; after all the position points are automatically detected and calibrated, the calibration sample hole disc exits to the initial position; the state of the pinhole detection device is switched to the online production detection state.

[0032] The present application has the following technical effects relative to the prior art:

[0033] The automatic detection and calibration system of the present application is independent of the pinhole detection device and does not interfere with the normal work of the pinhole detection device; the calibration sample hole disc simulates the micro-hole defects that may occur on the material surface, the sample hole disc driving device moves the calibration sample hole disc to the detection position of the original material, the current state of the pinhole detection device can be automatically detected, and the system can automatically calibrate the size deviation according to the standard sample hole, the deviation is continuously corrected until it converges to the target range, and the detection accuracy is improved. BRIEF DESCRIPTION OF DRAWINGS

[0034] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the embodiments will be briefly introduced below, and obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0035] Figure 1 It is a schematic diagram of the installation position of the automatic detection and calibration system in one or more embodiments of the present application.

[0036] Figure 2 It is a side view of the automatic detection and calibration system in one or more embodiments of the present application.

[0037] In the figure: 1-left side plate, 2-right side plate, 3-left light source adjusting plate, 4-right light source adjusting plate, 51-first camera, 52-second camera, 6-light source, 7-encoder, 8-synchronous encoder wheel, 9-material conveying roller, 10-material, 11-calibration sample hole disc, 12-in-out module, 13-lifting module, 14-lateral movement linear module. DETAILED DESCRIPTION

[0038] With reference to the accompanying drawings, the technical solutions in the embodiments of the present application will be described clearly and completely. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0039] The present application aims to provide an automatic point inspection and calibration system and method to solve the problems in the prior art and automatically calibrate the detection parameters of a pinhole detection device.

[0040] To make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the present application will be further described in detail below with reference to the drawings and specific embodiments.

[0041] The pinhole detection device is mainly used for detecting pinhole defects on the surface of foil products. The pinhole detection device known to the inventor is mostly based on machine vision technology and realizes the detection of pinhole through an industrial camera and image processing software. However, the pinhole detection device itself may also cause a decrease in detection accuracy or failure due to long-term use, environmental factors or equipment aging, and even cause false detection or missed detection. Therefore, in order to ensure the working accuracy and accuracy of the pinhole detection device, it is necessary to regularly perform point inspection and calibration to reduce errors. Based on this, the present application provides an automatic point inspection and calibration system, as shown in Figure 1 and Figure 2 The present application provides an automatic point inspection and calibration system, as shown in

[0042] The automatic inspection and calibration system of the present application is a key component for ensuring the efficient and accurate operation of the pinhole detection device. Based on the data processing and control system, the current state of the pinhole detection device is verified comprehensively and systematically through the inspection function of different detection positions of the pinhole detection device. The inspection process not only covers the confirmation of the detection measurement range, but also includes the stability of the detection signal state, the sufficiency of the detection capability, and the compliance of the detection performance index. More importantly, it verifies the consistency of the detection results by repeatedly detecting the calibration sample hole disc, thereby ensuring the reliability and accuracy of the pinhole detection device in actual application.

[0043] The calibration function is another core of the present application. When the pinhole detection device changes due to any factor, its internal parameters need to be updated accordingly to maintain the detection accuracy. The automatic inspection and calibration system is responsible for this task, which confirms the horizontal pixel ratio parameter of the pinhole detection device through the computer software of the data processing and control system, ensuring the accuracy of the measurement results. At the same time, the present application can also handle the two-dimensional projection problem of the non-physical corresponding light spot of the micro target, accurately calculate the deviation of the horizontal and vertical measurement size of the micro hole target from the actual size through the processing computer, and use relevant calculation parameters for correction. The processing computer uses a computer, and its calculation method is a mature technology, which will not be described in detail. In addition, for the measurement deviation of the micro hole area (especially the non-occupied state in the edge pixel), the present application can also provide accurate calculation parameters for correction. When multiple cameras are used together, the present application can also calculate and correct the overlap of the measurement area, ensuring the continuity and accuracy of the overall measurement.

[0044] It is particularly worth mentioning that the present application also has the ability to handle the light spot projection mapping when the measured micro hole target is smaller than one pixel, which is a mature technology and therefore will not be described in detail. Through the accurate calculation method in the mature known computer software, the related calculation parameters such as the length, width, and area of the micro hole target can be calibrated and corrected, thereby further improving the detection accuracy and reliability of the pinhole detection device. In summary, the automatic inspection and calibration system of the present application provides strong support for the pinhole detection device with its comprehensive inspection function and accurate calibration ability, ensuring the normal and accurate online detection process.

[0045] In an embodiment, the pinhole detection device comprises a mounting frame, both ends of the mounting frame are provided with strip conveying rollers 9, one end of the strip conveying rollers 9 is provided with a synchronous encoder wheel 8 above, the synchronous encoder wheel 8 is connected with an encoder 7, and the strip conveying speed of the strip 10 can be detected; the mounting frame comprises a left side plate 1 and a right side plate 2, the left side plate 1 and the right side plate 2 are connected through a top plate above, a laser ranging sensor can be arranged at the bottom of the top plate, the distance between the laser ranging sensor and the strip or the calibration sample hole disc 11 can be detected, and the image acquisition distance of the camera can be determined; the pinhole detection visual detection device comprises a camera and a light source 6; two cameras are arranged on the top plate in the embodiment, and the two cameras are a first camera 51 and a second camera 52; a left light source adjusting plate 3 is connected to the bottom of the left side plate 1 through bolts, and a right light source adjusting plate 4 is connected to the bottom of the right side plate 2 through bolts; a plurality of mounting holes are arranged on the left side plate 1 and the right side plate 2, therefore, the height position of the light source 6 can be adjusted by connecting the left light source adjusting plate 3 to different mounting holes of the left side plate 1 and connecting the right light source adjusting plate 4 to different mounting holes of the right side plate 2; the light source 6 can adopt an LED lamp tube, which is horizontally arranged between the left light source adjusting plate 3 and the right light source adjusting plate 4, and the light source 6 is located below the pinhole detection position of the strip 10, and is used for providing the light source 6, irradiating the bottom of the strip or the calibration sample hole disc 11, and making the pinhole more clear, so that the first camera 51 and the second camera 52 can collect pinhole images.

[0046] When the pinhole detection device works, the strip 10 enters the pinhole detection device from the bottom of the strip conveying roller 9 at one end, and then is conveyed out from the top of the strip conveying roller 9 at the other end, during which the first camera 51 and the second camera 52 on the top plate of the pinhole detection device collect image information of the strip 10, and transmit the image information to a data processing and control system to detect pinhole defects; the pinhole detection device and the working principle are mature technologies, and will not be described herein.

[0047] In order to make the device of the present application not interfere with the normal work of the pinhole detection device, and can be moved to the original detection position of the strip 10 when the pinhole detection device fails, and carry out point detection and calibration work, therefore the structure of the sample hole disc driving device of the embodiment includes a transverse moving linear module 14, the bottom of the pinhole detection device is provided with a transverse guide rail, the transverse sliding block of the transverse moving linear module 14 is movably connected to the transverse guide rail, the transverse sliding block can realize the sliding of the transverse sliding block along the transverse guide rail through the driving motor and the screw nut pair, the screw is arranged parallel to the transverse guide rail, the nut on the screw is connected with the transverse sliding block, and one end of the screw is connected with the driving motor, so as to realize the above functions; further, the first guide rail plate of the lifting module 13 is arranged on the sliding block of the transverse moving linear module 14; the first guide rail plate is provided with a first linear guide rail arranged vertically on the outer side, the first linear guide rail is provided with a first sliding block, and the first sliding block is connected with the in-out module 12 on the outer side; the first guide rail plate is provided with a first driving motor, the first driving motor is a linear motor, and is used for driving the first sliding block to move up and down along the first linear guide rail, and a screw nut pair can also be used to realize the function. The in-out module 12 includes a second guide rail plate fixedly connected with the first sliding block, the second guide rail plate is provided with a second linear guide rail arranged horizontally on the top, the second linear guide rail is provided with a second sliding block, and the second sliding block is connected with the calibration sample hole disc 11 on the top; the second guide rail plate is provided with a second driving motor, the second driving motor is a linear motor, and is used for driving the second sliding block to move horizontally forward and backward along the second linear guide rail; the lifting module 13 can lift the in-out module 12 and the calibration sample hole disc 11 to the position of the strip 10; the in-out module 12 can drive the calibration sample hole disc 11 to move horizontally to the pinhole detection position of the strip 10; the bottom of the calibration sample hole disc 11 is provided with a rotating motor, the rotating motor can drive the calibration sample hole disc 11 to rotate, and is used for simulating the transmission state of the strip 10.

[0048] The data processing and control system of this embodiment includes a data acquisition card, a processing computer, and an encoder 7. The data acquisition card can receive image signals from the first camera 51 and the second camera 52. The processing computer can perform image processing and analysis, and inspect and calibrate the pinhole detection device according to the image aperture measurement values. The processing computer processes the acquired sample hole images, extracts the sample hole size information, compares the measurement results with the standard sample hole size, calculates the size deviation, and continuously corrects the deviation according to intelligent calculation methods such as visual spot projection and nonlinear dynamic optimization until it converges to the target range. The processing computer, in conjunction with the PLC control system, can realize the switching of the working state between the device of the present invention and the pinhole detection device, and control the movement of each module of the device of the present invention. The processing computer automatically records the data of each inspection and calibration, including the detection time, detection result, calibration parameters, etc. According to the detection result and calibration result, it provides corresponding feedback and prompt information, such as detection qualified, calibration required, etc. After each inspection and calibration is completed, it automatically shuts down or enters the initialization standby state, waiting to start. The mature software built into the processing computer can automatically determine the outer boundary of the image formed by the calibration sample plate 11 and perform flat-field correction based on the signal status, ensuring that the measured size of the detected pinholes is consistent in the areas at the edge and far from the edge. The mature software built into the processing computer is equipped with an automatic micro-hole detection interference identification function, which can automatically eliminate interference signals, ensuring the authenticity, stability and effectiveness of the automatic inspection and calibration process.

[0049] The present invention also provides an automatic inspection and calibration method, comprising the following steps:

[0050] Step 1: System startup and initialization;

[0051] Step 2: Enter automatic inspection and calibration state; when the pinhole detection device reaches the inspection and maintenance cycle time point, or when the operator finds that it has an abnormal reaction, it automatically or manually switches to automatic inspection and calibration state; the material 10 automatically withdraws from the production area to make room for the calibration sample plate 11.

[0052] Step 3: The sample plate drive device moves the calibration sample plate 11 to the location of the pinhole detection of the material 10;

[0053] Step four: The rotating motor controls the calibration sample plate 11 to rotate, simulating the linear conveying state and speed of the material 10. The rotating motor is a stepper motor or a servo motor. The movement of the stepper motor or servo motor drives the controller connected to it to send pulse signals to the first camera 51 and the second camera 52. After receiving the pulse signals, the cameras wait for the automatic calibration start signal. When the processing computer determines that the rotation speed of the calibration sample plate 11 has reached the specified speed based on the data from the controller, it sends an automatic calibration start signal through the PLC control system, and the cameras acquire images.

[0054] The first camera 51 and the second camera 52 of the embodiment are both line scan cameras; the acquisition speed of the first camera 51 and the second camera 52 is controlled by the pulse signal generated by the motor controller when the stepping motor or the servo motor moves; when the stepping motor or the servo motor drives the calibration sample hole disc 11 to rotate, the pulse signal generated by the motor controller synchronously drives the line trigger acquisition operation of the first camera 51 and the second camera 52; in the process, in order to match the pulse signal and the line trigger acquisition frequency of the camera, the diameter of the calibration sample hole disc 11 can be recalculated and redesigned, the rotating motor model of the calibration sample hole disc 11 can be replaced, or the trigger signal pulse frequency converter inside the camera can be replaced, so that the pulse signal and the line trigger acquisition frequency of the camera are synchronized, which is a mature technology and will not be described here; when the rotating speed of the calibration sample hole disc 11 and the actual speed of the strip 10 do not match, the frequency division and frequency multiplication parameters of the camera can be adjusted; the camera and the processing computer are connected by wires, and the image data collected can be transmitted to the processing computer;

[0055] Step five, image processing and analysis; the processing computer receives the image signal of the camera, performs image processing and analysis, calculates the aperture size of the micro hole through an algorithm, and compares it with the actual size;

[0056] Step six, parameter adjustment and calibration; if the aperture measurement deviation is found to be out of range, the aperture measurement parameters are automatically or manually adjusted; the steps of image acquisition, processing and analysis are repeated until the aperture measurement deviation is within the allowed range, at which time the automatic point inspection and calibration of the current position are completed;

[0057] Step seven, transverse movement and multi-point detection; the transverse movement straight line module 14 is started to drive the calibration sample hole disc 11 to move uniformly along the axis of the strip conveying roller 9; in the moving process, steps four to six are repeated at different positions according to the set interval; when the calibration sample hole disc 11 moves to the overlapping area, two identical calibration holes can be detected on the first camera 51 and the second camera 52 at the same time, and the software in the processing computer will automatically determine that the micro hole appears in the first camera 51 and the second camera 52 at the same time; at this time, the position of the transverse movement straight line module 14 is recorded as position A, and the calculation starts from this position; the transverse movement straight line module 14 continues to move, until the software determines that the situation that the micro hole is detected by the first camera 51 and the second camera 52 synchronously disappears; at this time, the position B of the transverse movement straight line module 14 is calculated, and the position difference between the position B and the position A is the overlapping amount; this method is not limited by the number of cameras, and the overlapping amount can be automatically measured and calculated by combining the calibration position information appearing at the same time; when the automatic calibration action is completed, the calibration parameter value of the overlapping amount is automatically updated to the configuration parameters of the pinhole detection device and put into use.

[0058] Step eight, system reset and state switching; after all the position points are automatically inspected and calibrated, the processing computer controls the PLC controller to drive the calibration sample hole disc 11 to exit to the initial position; the state of the pinhole detection device is switched to the online production detection state, at this time the strip material 10 can be normally transmitted and the pinhole detection of the strip material 10 can be performed; at this time, the square wave pulse signal generated by the synchronous encoder wheel 8 drives the encoder 7 to control the first camera 51 and the second camera 52 to work, at this time, the acquisition speed of the first camera 51 and the second camera 52 is determined by the movement speed of the synchronous encoder wheel 8, since the synchronous encoder wheel 8 and the strip material 10 have the same speed, that is, the movement speed of the strip material 10.

[0059] The present application applies optical vision detection technology to the auxiliary inspection and calibration of the pinhole detection device. By rotating the calibration sample hole disc 11 to simulate the detection object (such as aluminum foil) of the pinhole detection device, and using the camera to automatically take the standard micro-hole image on the calibration sample hole disc 11. Then, the computer system processes and analyzes the image, judges the size of the measured hole, and compares it with the preset standard size. If the deviation is found to be beyond the allowed range, the computer system automatically calibrates the detection parameters of the pinhole detection device to ensure that it is always in a precise detection state. Optical vision detection technology is a technology that uses optical principles to detect objects non-contact. It captures the image of the object through the camera, and then uses image processing algorithms to analyze and process the image, so as to realize the measurement and judgment of the object size, shape, defect and other parameters. This technology has the advantages of non-contact, high precision, high speed, etc., and has been widely used in industrial automation field, and belongs to mature technology, so it is not described in detail.

[0060] The present application can significantly improve the detection accuracy and stability of the pinhole detection device, reduce the false detection and missed detection. At the same time, the automation operation is realized, the cost and risk of manual intervention are reduced. In addition, through the functions of flat field correction and interference automatic identification, the accuracy and reliability of the system are further improved.

[0061] The principles and implementation modes of the present application are described by applying specific examples in the present application, the above embodiment is only used to help understand the method of the present application and its core idea; at the same time, for those skilled in the art, according to the idea of the present application, the specific implementation mode and application range will be changed. In view of the above, the content of the specification should not be understood as a limitation of the present application.

Claims

1. An automatic inspection and calibration system, characterized by: The utility model relates to a kind of pinhole detection device, including: Calibration sample hole disc, micro-hole is equipped on it, for simulating the pinhole defect of strip surface; Sample hole disc driving device, it is arranged at the bottom of pinhole detection device, it can drive the calibration sample hole disc to move to the position where strip pinhole detection is; Pinhole detection visual detection device, it is arranged on pinhole detection device, it can collect micro-hole on calibration sample hole disc; Data processing and control system, it can receive the image signal of pinhole detection visual detection device, and carry out image processing, analysis and pinhole detection device point detection and calibration; The sample hole disc driving device includes lifting module, the lifting module is equipped with in-out module, and the calibration sample hole disc is horizontally arranged on the in-out module; The lifting module can lift the in-out module and calibration sample hole disc to the position where strip is equal height, and the in-out module can drive the calibration sample hole disc to move horizontally to the position where strip pinhole detection is;The bottom of the calibration sample hole disc is equipped with rotating motor, and the rotating motor can drive the calibration sample hole disc to rotate;The pinhole detection device includes mounting bracket, and the mounting bracket both ends are equipped with strip conveying roller, and one end of the strip conveying roller is equipped with synchronous encoder wheel above, and the synchronous encoder wheel is connected with encoder;The mounting bracket includes left side plate and right side plate, and the left side plate and right side plate are connected through top plate above; In terms of point detection, the detection measurement range, detection signal state, detection ability, detection performance index of pinhole detection device are comprehensively checked, and the consistency of repeated detection results of physical detection is checked. In terms of calibration, the lateral pixel ratio parameter of pinhole detection device is confirmed, and the two-dimensional projection of non-physical corresponding light spot of micro target is calculated to obtain the deviation of horizontal and vertical measurement size of micro-hole target on calibration sample hole disc from actual size. Meanwhile, the measurement deviation of micro-hole area is also calculated and corrected.

2. The automatic inspection and calibration system of claim 1, wherein: It also includes a horizontal movement linear module, the pinhole detection device bottom is equipped with horizontal guide rail, the horizontal movement linear module is movably connected to the horizontal guide rail, and the lifting module is arranged on the horizontal movement linear module;The horizontal movement linear module can drive the lifting module, the in-out module and the calibration sample hole disc to move uniformly along the axis direction of strip conveying roller.

3. The automatic inspection and calibration system of claim 2, wherein: The lifting module includes a first guide rail plate connected to the horizontal movement linear module, a first linear guide rail is arranged vertically outside the first guide rail plate, a first slider is arranged on the first linear guide rail, and the first slider is connected to the in-out module outside.

4. The automatic inspection and calibration system of claim 3, wherein: The in-out module includes a second guide rail plate fixedly connected to the first slider, a second linear guide rail is arranged horizontally on the top of the second guide rail plate, a second slider is arranged on the second linear guide rail, and the top of the second slider is connected to the calibration sample hole disc. The second guide rail plate is equipped with second drive motor, and the second drive motor is used to drive the second slider to move horizontally forward and backward along the second linear guide rail.

5. The automatic inspection and calibration system of claim 1, wherein: The pinhole detection visual inspection device comprises a camera and a light source; the camera is arranged on the top plate; the left light source adjusting plate is connected to the bottom of the left side plate; the right light source adjusting plate is arranged at the bottom of the right side plate; the light source is horizontally arranged between the left light source adjusting plate and the right light source adjusting plate, and the light source is located below the pinhole detection position of the strip.

6. The automatic inspection and calibration system of claim 5, wherein: The data processing and control system comprises a data line acquisition card, a processing computer and the encoder; the data line acquisition card can receive the image signal of the camera; the processing computer can perform image processing and analysis, and can detect and calibrate the pinhole detection device according to the image aperture measurement value.

7. The automatic inspection and calibration system of claim 6, wherein: The processing computer can automatically judge the outer boundary of the imaging of the calibration sample hole disc, and can perform flat field correction according to the signal state; and the processing computer can automatically eliminate the interference signal.

8. An automatic inspection and calibration method based on the automatic inspection and calibration system according to any one of claims 1 to 7, characterized in that: The method comprises the following steps: Step one, system startup and initialization; Step two, enter the automatic point inspection and calibration state; when the pinhole detection device reaches the point inspection and maintenance cycle time point, or the operator finds that it has an abnormal reaction, automatically or manually switch to the automatic point inspection and calibration state; the strip is automatically withdrawn from the production area to provide space for the calibration sample hole disc; Step three, the sample hole disc driving device moves the calibration sample hole disc to the position where the strip pinhole detection is located; Step four, the calibration sample hole disc rotates to simulate the straight line conveying state of the strip, and the camera collects images; Step five, image processing and analysis; the processing computer receives the image signal of the camera, performs image processing and analysis, calculates the aperture size of the micro hole through an algorithm, and compares it with the actual size; Step six, parameter adjustment and calibration; If the aperture measurement deviation is found to be out of range, the aperture measurement parameters are automatically or manually adjusted; the steps of image collection, processing and analysis are repeated until the aperture measurement deviation is within the allowed range; Step seven, transverse movement and multi-point detection; the transverse movement straight line module is started to drive the calibration sample hole disc to move at a constant speed along the center direction of the strip conveying roller, and in the moving process, steps four to six are repeated at different position points at a uniform interval according to the set interval; Step eight, system reset and state switching; After all the position points are automatically detected and calibrated, the calibration sample hole disc is withdrawn to the initial position; The state of the pinhole detection device is switched to the online production detection state.

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