An imaging speed control system and method for a midframe detector

Abstract

The application discloses a kind of imaging line speed control system and method of middle frame detector, it is related to electronic manufacturing field, it solves the problem that existing imaging line speed control system has poor speed control effect, including straight edge imaging module: the imaging speed monitoring of target electronic equipment's middle frame straight edge is carried out, and the target equipment straight edge imaging speed is obtained by comprehensive analysis to monitoring result, R angle imaging module: the imaging angle speed monitoring of target electronic equipment's middle frame R angle is carried out, and the target equipment R angle imaging speed is obtained according to monitoring result, speed control module: according to target equipment R angle imaging speed and target equipment straight edge imaging speed, imaging speed control is carried out to middle frame detector, the accuracy and comprehensiveness of imaging speed control process can be effectively improved by the application.

Description

Technical Field

[0001] This invention belongs to the field of electronic manufacturing and relates to data analysis technology. Specifically, it is an imaging linear velocity control system and method for a mid-frame inspection instrument. Background Technology

[0002] Existing imaging linear velocity control systems have the following drawbacks when controlling the imaging speed of the mid-frame detector:

[0003] 1. The existing imaging linear velocity control system cannot perform image acquisition time difference monitoring and image acquisition distance monitoring based on the multiple frames of straight edge images acquired by the mid-frame detector within the sample straight edge monitoring cycle. It also cannot obtain the straight edge imaging speed of the target device by comprehensively analyzing the time monitoring results and distance monitoring results, and it cannot adjust the imaging linear velocity in real time based on the straight edge imaging speed of the target device, resulting in a lack of accuracy in the linear velocity adjustment process.

[0004] 2. The existing imaging linear velocity control system cannot perform image acquisition time difference monitoring and image acquisition angle monitoring separately based on the multiple frames of R-angle images acquired by the mid-frame detector within the sample R-angle monitoring period. Furthermore, it cannot obtain the R-angle imaging speed of the target device by comprehensively analyzing the time monitoring results and angle monitoring results. Based on the R-angle imaging speed of the target device, real-time imaging angular velocity adjustment cannot be performed, resulting in a lack of accuracy in the angular velocity adjustment process.

[0005] Therefore, we propose an imaging linear velocity control system and method for a mid-frame detector. Summary of the Invention

[0006] In view of the shortcomings of the existing technology, the purpose of this invention is to provide an imaging linear velocity control system and method for a mid-frame detector, and to improve the accuracy of the imaging linear velocity control system.

[0007] The objective of this invention can be achieved through the following technical solution: an imaging linear velocity control system for a mid-frame detector, wherein the specific working process of each module is as follows:

[0008] Straight-edge imaging module: monitors the imaging speed of the straight edges of the mid-frame of the target electronic device, and performs comprehensive analysis on the monitoring results to obtain the straight-edge imaging speed of the target device;

[0009] R-angle imaging module: monitors the imaging angular velocity of the mid-frame R-angle of the target electronic device and obtains the R-angle imaging velocity of the target device based on the monitoring results;

[0010] Speed ​​control module: Controls the imaging speed of the mid-frame detector based on the imaging speed of the target device's R-angle and straight edges.

[0011] Furthermore, the imaging speed of the target device along its straight edge is obtained, as follows:

[0012] The target electronic device is obtained by acquiring the mid-frame image of the electronic device that is currently acquiring the mid-frame image of the mid-frame detector.

[0013] The four straight edges of the middle frame corresponding to the target electronic device are obtained and named as the first straight edge of the middle frame, the second straight edge of the middle frame, the third straight edge of the middle frame, and the fourth straight edge of the middle frame, respectively.

[0014] The imaging linear velocity of the first straight edge of the first middle frame is monitored to obtain the imaging linear velocity of the first straight edge.

[0015] Repeat the process of obtaining the imaging line velocity of the first straight edge, and obtain the imaging line velocities of the straight edges corresponding to the second, third and fourth middle frame straight edges respectively, to obtain the imaging line velocities of the second, third and fourth straight edges.

[0016] The length values ​​of the straight edges of the first, second, third, and fourth middle frames are obtained respectively.

[0017] Sum the length values ​​of the first straight edge to the fourth straight edge to obtain the total length value of the straight edges of the middle frame;

[0018] The target device's straight-edge imaging speed is obtained by calculating the length values ​​of the first straight edge to the fourth straight edge, the imaging linear velocity of the first straight edge to the fourth straight edge, and the total length value of the straight edges of the middle frame.

[0019] The imaging speed along the straight edge of the target device is calculated using the following formula:

[0020] ;

[0021] Where Zcs is the straight edge imaging speed of the target device, Css1 to Css4 are the imaging linear speeds of the first straight edge to the fourth straight edge respectively, Zb1 to Zb4 are the length values ​​of the first straight edge to the fourth straight edge respectively, and Zlj is the total length value of the straight edges of the middle frame.

[0022] Furthermore, the imaging linear velocity of the first straight edge is obtained, as follows:

[0023] The time point at which the mid-frame detector begins to acquire images of the first straight edge of the mid-frame is designated as the first straight edge feature time point, and the time point at which the mid-frame detector begins and ends to acquire images of the first straight edge of the mid-frame is designated as the second straight edge feature time point. The first straight edge feature time point and the second straight edge feature time point are set as the sample straight edge monitoring cycle.

[0024] The images acquired by the mid-frame detector during the sample straight edge monitoring period are obtained frame by frame to obtain multiple sample straight edge images. The acquired sample straight edge images are set as Z1 straight edge image to Za straight edge image according to the order of acquisition time.

[0025] The image acquisition times corresponding to the Z1 straight edge image to the Za straight edge image are obtained respectively, thus obtaining the acquisition time points from the Z1 straight edge image to the Za straight edge image.

[0026] By analyzing the acquisition distance from the straight edge image of Z1 to the straight edge image of Za, the distance between the Z1 edge spacing and the Za-1 edge spacing is obtained.

[0027] Obtain the time difference between the sampling time points of Z1 and Z2 straight edges to get the Z1 straight edge time difference; obtain the time difference between the sampling time points of Z2 and Z3 straight edges to get the Z2 straight edge time difference; and so on, obtain the time difference between the sampling time points of Za-1 and Za straight edges to get the Za-1 straight edge time difference.

[0028] The imaging linear velocity of the first straight edge is obtained by calculating the distance from the Z1 edge spacing to the Za-1 edge spacing and the time difference between the Z1 straight edge and the Za-1 straight edge.

[0029] The linear velocity of the image on the first straight edge is calculated using the following formula:

[0030] ;

[0031] Where Cxx1 is the imaging linear velocity of the first straight edge, Jlci is the distance between the Zi edges, Zsci is the time difference of the Zi straight edge, and a is the quantity value corresponding to the sample straight edge image.

[0032] Furthermore, the distance between the edge lines is obtained, as follows:

[0033] Obtain the center point of the straight edge region in the Z1 straight edge image, and draw a straight line perpendicular to the ground through the center point of the straight edge region to obtain the Z1 straight edge line. Obtain the center point of the straight edge region in the Z2 straight edge image, and draw a straight line perpendicular to the ground through the center point of the straight edge region to obtain the Z2 straight edge line. And so on, obtain the center point of the straight edge region in the Za straight edge image, and draw a straight line perpendicular to the ground through the center point of the straight edge region to obtain the Za straight edge line.

[0034] Obtain the distance between the straight edge Z1 and the straight edge Z2 in the straight edge of the first middle frame to obtain the Z1 edge spacing distance. Obtain the distance between the straight edge Z2 and the straight edge Z3 in the straight edge of the first middle frame to obtain the Z2 edge spacing distance. And so on, obtain the distance between the straight edge Za-1 and the straight edge Za in the straight edge of the first middle frame to obtain the Za-1 edge spacing distance.

[0035] Furthermore, the imaging velocity of the target device's radius (R-angle) is obtained, as follows:

[0036] The four mid-frame R-corners corresponding to the target electronic device are obtained and named as the first mid-frame R-corner, the second mid-frame R-corner, the third mid-frame R-corner, and the fourth mid-frame R-corner, respectively.

[0037] The imaging angular velocity of the first middle frame R angle is monitored to obtain the imaging angular velocity of the first R angle;

[0038] Repeat the process of obtaining the imaging angular velocity of the first R angle, and obtain the linear imaging angular velocities corresponding to the second, third, and fourth middle frame R angles respectively, to obtain the imaging angular velocities of the second, third, and fourth R angles.

[0039] The average of the imaging angular velocities from the first R-angle to the fourth R-angle is calculated to obtain the R-angle imaging velocity of the target device.

[0040] Furthermore, the imaging angular velocity of the first R angle is obtained, as follows:

[0041] The time point at which the mid-frame detector begins to acquire images of the first mid-frame R-corner is designated as the first R-corner feature time point, and the time point at which the mid-frame detector begins and ends to acquire images of the first mid-frame R-corner is designated as the second R-corner feature time point. The first R-corner feature time point and the second R-corner feature time point are set as the sample R-corner monitoring cycle.

[0042] The images acquired by the mid-frame detector during the sample R-angle monitoring period are obtained frame by frame to obtain multiple sample R-angle images. The acquired sample R-angle images are set as P1R-angle image to PbR-angle image according to the order of acquisition time.

[0043] The image acquisition times corresponding to the P1R angle image to the PbR angle image are obtained respectively, thus obtaining the acquisition time points from the P1R angle to the PbR angle.

[0044] The image acquisition movement angles corresponding to the P1R angle image and the PbR angle image are obtained to obtain the movement angle of the P1 image;

[0045] The image acquisition movement angles corresponding to the P2R and P3R angle images are obtained to obtain the P2 image movement angle. The image acquisition movement angles corresponding to the P3R and P4R angle images are obtained to obtain the P3 image movement angle. Similarly, the image acquisition movement angles corresponding to the Pb-1R and PbR angle images are obtained to obtain the Pb-1 image movement angle.

[0046] Obtain the time difference between the P1R angle acquisition time point and the P2R angle acquisition time point to obtain the P1R angle time difference; obtain the time difference between the P2R angle acquisition time point and the P3R angle acquisition time point to obtain the P2R angle time difference; and so on, obtain the time difference between the Pb-1R angle acquisition time point and the PbR angle acquisition time point to obtain the Pb-1R angle time difference.

[0047] The first R-angle imaging angular velocity is obtained by calculating the time difference between the P1 image movement angle and the Pb-1 image movement angle, as well as the time difference between the P1R angle and the Pb-1R angle.

[0048] The imaging angular velocity of the first R angle is calculated using the following formula:

[0049] ;

[0050] Where Rxx1 is the first R-angle imaging angular velocity, Rlci is the Pi image movement angle, Rsci is the RiR angle time difference, and b is the quantity value corresponding to the sample R-angle image.

[0051] Furthermore, the movement angle of image P1 is obtained, as follows:

[0052] The center point of the R-angle region in the P1R-angle image is obtained to obtain the P1 angle feature point. The center point of the R-angle region in the P2R-angle image is obtained to obtain the P2 angle feature point. The arc intercepted by the P1 and P2 angle feature points in the R-angle of the first middle frame is obtained to obtain the P1 feature arc. The center point of the circle corresponding to the P1 feature arc is obtained to obtain the P1 center point.

[0053] The line connecting the center point of P1 and the angular feature point of P1 is set as the first center angle line, and the line connecting the center point of P1 and the angular feature point of P2 is set as the second center angle line.

[0054] The angle between the first and second central angle lines at the center point P1 is obtained to get the central angle of P1 in radians. The angle value of the central angle of P1 in radians is obtained to get the movement angle of the P1 image.

[0055] Furthermore, the imaging speed of the mid-frame detector is controlled as follows:

[0056] The imaging speed at the R-angle of the target device and the imaging speed at the straight edge of the target device are obtained respectively, and reasonable ranges for the imaging speed at the R-angle and the imaging speed at the straight edge are set respectively.

[0057] The R-angle image acquisition speed of the mid-frame detector is controlled based on the R-angle imaging speed of the target device and the reasonable range of the R-angle imaging speed.

[0058] The straight edge image acquisition speed of the mid-frame detector is controlled according to the reasonable range of the straight edge imaging speed and the R-angle imaging speed of the target device.

[0059] Specifically as follows:

[0060] If the straight edge imaging speed of the target device is greater than the upper limit of the reasonable range of straight edge imaging speed, the straight edge image acquisition speed corresponding to the mid-frame detector will be adjusted downward until the straight edge imaging speed of the target device is within the reasonable range of straight edge imaging speed.

[0061] If the straight edge imaging speed of the target device is less than the lower limit of the reasonable range of straight edge imaging speed, the straight edge image acquisition speed corresponding to the mid-frame detector will be adjusted upward until the straight edge imaging speed of the target device is within the reasonable range of straight edge imaging speed.

[0062] If the straight-edge imaging speed of the target device is within a reasonable range, then there is no need to adjust the straight-edge imaging speed.

[0063] Furthermore, the acquisition speed of the R-angle image is controlled as follows:

[0064] If the R-angle imaging speed of the target device is greater than the upper limit of the reasonable range of R-angle imaging speed, then the R-angle image acquisition speed corresponding to the mid-frame detector will be adjusted downward until the R-angle imaging speed of the target device is within the reasonable range of R-angle imaging speed.

[0065] If the R-angle imaging speed of the target device is less than the lower limit of the reasonable range of R-angle imaging speed, then the R-angle image acquisition speed corresponding to the mid-frame detector will be adjusted upward until the R-angle imaging speed of the target device is within the reasonable range of R-angle imaging speed.

[0066] If the R-angle imaging speed of the target device is within a reasonable range, then there is no need to adjust the R-angle imaging speed.

[0067] A method for controlling the imaging linear velocity of a mid-frame detector, comprising:

[0068] Step S1: Monitor the imaging speed of the straight edge of the midframe of the target electronic device, and perform comprehensive analysis on the monitoring results to obtain the imaging speed of the straight edge of the target device;

[0069] Step S2: Monitor the imaging angular velocity of the mid-frame R-angle of the target electronic device, and obtain the imaging velocity of the target device R-angle based on the monitoring results;

[0070] Step S3: Control the imaging speed of the mid-frame detector based on the imaging speed of the target device's R-angle and the imaging speed of the target device's straight edge.

[0071] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0072] 1. This invention uses multiple frames of straight edge images acquired by the mid-frame detector during the straight edge monitoring period of the sample to perform image acquisition time difference monitoring and image acquisition distance monitoring respectively. By comprehensively analyzing the time monitoring results and distance monitoring results, the straight edge imaging speed of the target device is obtained, and the imaging linear speed is adjusted in real time according to the straight edge imaging speed of the target device, thereby effectively improving the accuracy and comprehensiveness of the linear speed adjustment process.

[0073] 2. This invention uses multiple frames of R-angle images acquired by the mid-frame detector within the sample R-angle monitoring period to perform image acquisition time difference monitoring and image acquisition angle monitoring respectively. By comprehensively analyzing the time monitoring results and angle monitoring results, the R-angle imaging speed of the target device is obtained, and the imaging angular velocity is adjusted in real time according to the R-angle imaging speed of the target device, thereby effectively improving the accuracy and comprehensiveness of the angular velocity adjustment process. Attached Figure Description

[0074] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0075] Figure 1 This is an overall system block diagram of the present invention;

[0076] Figure 2 This is a diagram illustrating the implementation steps of the present invention. Detailed Implementation

[0077] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0078] Example 1

[0079] Please see Figure 1 The present invention provides a technical solution: an imaging line speed control system for a mid-frame detector, comprising a straight edge imaging module, an R-angle imaging module, a speed control module and a server, wherein the straight edge imaging module, the R-angle imaging module and the speed control module are respectively connected to the server, and the server controls the straight edge imaging module, the R-angle imaging module and the speed control module respectively.

[0080] The straight-edge imaging module monitors the imaging speed of the straight edges of the mid-frame of the target electronic device, and performs comprehensive analysis on the monitoring results to obtain the straight-edge imaging speed of the target device.

[0081] Specifically as follows:

[0082] The target electronic device is obtained by acquiring the mid-frame image of the electronic device that is currently acquiring the mid-frame image of the mid-frame detector.

[0083] It should be noted here that:

[0084] In this application, the electronic device referred to herein is specifically a smartphone.

[0085] The four straight edges of the middle frame corresponding to the target electronic device are obtained and named as the first straight edge of the middle frame, the second straight edge of the middle frame, the third straight edge of the middle frame, and the fourth straight edge of the middle frame, respectively.

[0086] The time point at which the mid-frame detector begins to acquire images of the first straight edge of the mid-frame is designated as the first straight edge feature time point, and the time point at which the mid-frame detector begins and ends to acquire images of the first straight edge of the mid-frame is designated as the second straight edge feature time point. The first straight edge feature time point and the second straight edge feature time point are set as the sample straight edge monitoring cycle.

[0087] The images acquired by the mid-frame detector during the sample straight edge monitoring period are obtained frame by frame to obtain multiple sample straight edge images. The acquired sample straight edge images are set as Z1 straight edge image to Za straight edge image according to the order of acquisition time.

[0088] It should be noted here that:

[0089] In this application, 1, 2, 3...a in the straight edge images Z1 to Za are the numbers corresponding to the straight edge images.

[0090] The image acquisition times corresponding to the Z1 straight edge image to the Za straight edge image are obtained respectively, thus obtaining the acquisition time points from the Z1 straight edge image to the Za straight edge image.

[0091] Obtain the center point of the straight edge region in the Z1 straight edge image, and draw a straight line perpendicular to the ground through the center point of the straight edge region to obtain the Z1 straight edge line. Obtain the center point of the straight edge region in the Z2 straight edge image, and draw a straight line perpendicular to the ground through the center point of the straight edge region to obtain the Z2 straight edge line. And so on, obtain the center point of the straight edge region in the Za straight edge image, and draw a straight line perpendicular to the ground through the center point of the straight edge region to obtain the Za straight edge line.

[0092] Obtain the distance between the straight edge Z1 and the straight edge Z2 in the straight edge of the first middle frame to obtain the Z1 edge spacing distance. Obtain the distance between the straight edge Z2 and the straight edge Z3 in the straight edge of the first middle frame to obtain the Z2 edge spacing distance. And so on, obtain the distance between the straight edge Za-1 and the straight edge Za in the straight edge of the first middle frame to obtain the Za-1 edge spacing distance.

[0093] Obtain the time difference between the sampling time points of Z1 and Z2 straight edges to get the Z1 straight edge time difference; obtain the time difference between the sampling time points of Z2 and Z3 straight edges to get the Z2 straight edge time difference; and so on, obtain the time difference between the sampling time points of Za-1 and Za straight edges to get the Za-1 straight edge time difference.

[0094] The imaging linear velocity of the first straight edge is obtained by calculating the distance from the Z1 edge spacing to the Za-1 edge spacing and the time difference between the Z1 straight edge and the Za-1 straight edge.

[0095] The linear velocity of the image on the first straight edge is calculated using the following formula:

[0096] ;

[0097] Where Cxx1 is the imaging linear velocity of the first straight edge, Jlci is the Zi edge line spacing distance, Zsci is the Zi straight edge time difference, and a is the quantity value corresponding to the sample straight edge image;

[0098] Repeat the process of obtaining the imaging line velocity of the first straight edge, and obtain the imaging line velocities of the straight edges corresponding to the second, third and fourth middle frame straight edges respectively, to obtain the imaging line velocities of the second, third and fourth straight edges.

[0099] The length values ​​of the straight edges of the first, second, third, and fourth middle frames are obtained respectively.

[0100] Sum the length values ​​of the first straight edge to the fourth straight edge to obtain the total length value of the straight edges of the middle frame;

[0101] The target device's straight-edge imaging speed is obtained by calculating the length values ​​of the first straight edge to the fourth straight edge, the imaging linear velocity of the first straight edge to the fourth straight edge, and the total length value of the straight edges of the middle frame.

[0102] The imaging speed along the straight edge of the target device is calculated using the following formula:

[0103] ;

[0104] Where Zcs is the straight edge imaging speed of the target device, Css1 to Css4 are the imaging linear speeds of the first straight edge to the fourth straight edge respectively, Zb1 to Zb4 are the length values ​​of the first straight edge to the fourth straight edge respectively, and Zlj is the total length value of the straight edges of the middle frame.

[0105] The straight-edge imaging module monitors the imaging angular velocity of the mid-frame radius (R-angle) of the target electronic device and obtains the imaging velocity of the target device's R-angle based on the monitoring results;

[0106] Specifically as follows:

[0107] The four mid-frame R-corners corresponding to the target electronic device are obtained and named as the first mid-frame R-corner, the second mid-frame R-corner, the third mid-frame R-corner, and the fourth mid-frame R-corner, respectively.

[0108] The time point at which the mid-frame detector begins to acquire images of the first mid-frame R-corner is designated as the first R-corner feature time point, and the time point at which the mid-frame detector begins and ends to acquire images of the first mid-frame R-corner is designated as the second R-corner feature time point. The first R-corner feature time point and the second R-corner feature time point are set as the sample R-corner monitoring cycle.

[0109] The images acquired by the mid-frame detector during the sample R-angle monitoring period are obtained frame by frame to obtain multiple sample R-angle images. The acquired sample R-angle images are set as P1R-angle image to PbR-angle image according to the order of acquisition time.

[0110] It should be noted here that:

[0111] In this application, 1, 2, 3...b in the P1R angle image to PbR angle image are the numbers corresponding to the R angle images.

[0112] The image acquisition times corresponding to the P1R angle image to the PbR angle image are obtained respectively, thus obtaining the acquisition time points from the P1R angle to the PbR angle.

[0113] The image acquisition movement angles corresponding to the P1R angle image and the PbR angle image are obtained to obtain the movement angle of the P1 image;

[0114] The center point of the R-angle region in the P1R-angle image is obtained to obtain the P1 angle feature point. The center point of the R-angle region in the P2R-angle image is obtained to obtain the P2 angle feature point. The arc intercepted by the P1 and P2 angle feature points in the R-angle of the first middle frame is obtained to obtain the P1 feature arc. The center point of the circle corresponding to the P1 feature arc is obtained to obtain the P1 center point.

[0115] The line connecting the center point of P1 and the angular feature point of P1 is set as the first center angle line, and the line connecting the center point of P1 and the angular feature point of P2 is set as the second center angle line.

[0116] The angle between the first and second central angle lines at the center point P1 is obtained to get the central angle of P1 in radians. The angle value of the central angle of P1 in radians is obtained to get the image movement angle of P1.

[0117] The image acquisition movement angles corresponding to the P2R and P3R angle images are obtained to obtain the P2 image movement angle. The image acquisition movement angles corresponding to the P3R and P4R angle images are obtained to obtain the P3 image movement angle. Similarly, the image acquisition movement angles corresponding to the Pb-1R and PbR angle images are obtained to obtain the Pb-1 image movement angle.

[0118] Obtain the time difference between the P1R angle acquisition time point and the P2R angle acquisition time point to obtain the P1R angle time difference; obtain the time difference between the P2R angle acquisition time point and the P3R angle acquisition time point to obtain the P2R angle time difference; and so on, obtain the time difference between the Pb-1R angle acquisition time point and the PbR angle acquisition time point to obtain the Pb-1R angle time difference.

[0119] The first R-angle imaging angular velocity is obtained by calculating the time difference between the P1 image movement angle and the Pb-1 image movement angle, as well as the time difference between the P1R angle and the Pb-1R angle.

[0120] The imaging angular velocity of the first R angle is calculated using the following formula:

[0121] ;

[0122] Where Rxx1 is the first R-angle imaging angular velocity, Rlci is the Pi image movement angle, Rsci is the RiR angle time difference, and b is the quantity value corresponding to the sample R-angle image;

[0123] Repeat the process of obtaining the imaging angular velocity of the first R angle, and obtain the linear imaging angular velocities corresponding to the second, third, and fourth middle frame R angles respectively, to obtain the imaging angular velocities of the second, third, and fourth R angles.

[0124] The average of the imaging angular velocities from the first R-angle to the fourth R-angle is calculated to obtain the R-angle imaging velocity of the target device.

[0125] The speed control module controls the imaging speed of the mid-frame detector based on the imaging speed of the target device's R-angle and the imaging speed of the target device's straight edge;

[0126] Specifically as follows:

[0127] The imaging speed at the R-angle of the target device and the imaging speed at the straight edge of the target device are obtained respectively, and reasonable ranges for the imaging speed at the R-angle and the imaging speed at the straight edge are set respectively.

[0128] It should be noted here that:

[0129] The electronic devices whose mid-frame inspection was completed and passed by the mid-frame inspection instrument on the previous working day are obtained to obtain multiple historical electronic devices. The imaging speed of the device's R-angle and the imaging speed of the device's straight edge are obtained for each historical electronic device. The numerical range formed by the imaging speed of the R-angle of the multiple devices is set as the reasonable range of the R-angle imaging speed, and the numerical range formed by the imaging speed of the straight edge of the multiple devices is set as the reasonable range of the straight edge imaging speed.

[0130] The R-angle image acquisition speed of the mid-frame detector is controlled based on the R-angle imaging speed of the target device and the reasonable range of the R-angle imaging speed.

[0131] Specifically as follows:

[0132] If the R-angle imaging speed of the target device is greater than the upper limit of the reasonable range of R-angle imaging speed, then the R-angle image acquisition speed corresponding to the mid-frame detector will be adjusted downward until the R-angle imaging speed of the target device is within the reasonable range of R-angle imaging speed.

[0133] If the R-angle imaging speed of the target device is less than the lower limit of the reasonable range of R-angle imaging speed, then the R-angle image acquisition speed corresponding to the mid-frame detector will be adjusted upward until the R-angle imaging speed of the target device is within the reasonable range of R-angle imaging speed.

[0134] If the R-angle imaging speed of the target device is within a reasonable range, then there is no need to adjust the R-angle imaging speed.

[0135] It should be noted here that:

[0136] In this application, the absence of R-angle imaging speed adjustment refers to the situation where the R-angle imaging speed of the target device is within the boundary of a reasonable R-angle imaging speed range.

[0137] The straight edge image acquisition speed of the mid-frame detector is controlled according to the reasonable range of the straight edge imaging speed and the R-angle imaging speed of the target device.

[0138] Specifically as follows:

[0139] If the straight edge imaging speed of the target device is greater than the upper limit of the reasonable range of straight edge imaging speed, the straight edge image acquisition speed corresponding to the mid-frame detector will be adjusted downward until the straight edge imaging speed of the target device is within the reasonable range of straight edge imaging speed.

[0140] If the straight edge imaging speed of the target device is less than the lower limit of the reasonable range of straight edge imaging speed, the straight edge image acquisition speed corresponding to the mid-frame detector will be adjusted upward until the straight edge imaging speed of the target device is within the reasonable range of straight edge imaging speed.

[0141] If the straight-edge imaging speed of the target device is within a reasonable range, then there is no need to adjust the straight-edge imaging speed.

[0142] It should be noted here that:

[0143] In this application, the phrase "no need to adjust the straight-edge imaging speed" refers to the situation where the straight-edge imaging speed of the target device is within the boundary of a reasonable range for straight-edge imaging speed.

[0144] Example 2

[0145] Please see Figure 2 Based on another concept of the same invention, a method for controlling the imaging linear velocity of a mid-frame detector is now proposed, comprising the following steps:

[0146] Step S1: Monitor the imaging speed of the straight edge of the midframe of the target electronic device, and perform comprehensive analysis on the monitoring results to obtain the imaging speed of the straight edge of the target device;

[0147] Step S1 includes the following steps:

[0148] The target electronic device is obtained by acquiring the mid-frame image of the electronic device that is currently acquiring the mid-frame image of the mid-frame detector.

[0149] The four straight edges of the middle frame corresponding to the target electronic device are obtained and named as the first straight edge of the middle frame, the second straight edge of the middle frame, the third straight edge of the middle frame, and the fourth straight edge of the middle frame, respectively.

[0150] The imaging linear velocity of the first straight edge of the first middle frame is monitored to obtain the imaging linear velocity of the first straight edge.

[0151] Specifically as follows:

[0152] The time point at which the mid-frame detector begins to acquire images of the first straight edge of the mid-frame is designated as the first straight edge feature time point, and the time point at which the mid-frame detector begins and ends to acquire images of the first straight edge of the mid-frame is designated as the second straight edge feature time point. The first straight edge feature time point and the second straight edge feature time point are set as the sample straight edge monitoring cycle.

[0153] The images acquired by the mid-frame detector during the sample straight edge monitoring period are obtained frame by frame to obtain multiple sample straight edge images. The acquired sample straight edge images are set as Z1 straight edge image to Za straight edge image according to the order of acquisition time.

[0154] The image acquisition times corresponding to the Z1 straight edge image to the Za straight edge image are obtained respectively, thus obtaining the acquisition time points from the Z1 straight edge image to the Za straight edge image.

[0155] By analyzing the acquisition distance from the straight edge image of Z1 to the straight edge image of Za, the distance between the Z1 edge spacing and the Za-1 edge spacing is obtained.

[0156] Specifically as follows:

[0157] Obtain the center point of the straight edge region in the Z1 straight edge image, and draw a straight line perpendicular to the ground through the center point of the straight edge region to obtain the Z1 straight edge line. Obtain the center point of the straight edge region in the Z2 straight edge image, and draw a straight line perpendicular to the ground through the center point of the straight edge region to obtain the Z2 straight edge line. And so on, obtain the center point of the straight edge region in the Za straight edge image, and draw a straight line perpendicular to the ground through the center point of the straight edge region to obtain the Za straight edge line.

[0158] Obtain the distance between the straight edge Z1 and the straight edge Z2 in the straight edge of the first middle frame to obtain the Z1 edge spacing distance. Obtain the distance between the straight edge Z2 and the straight edge Z3 in the straight edge of the first middle frame to obtain the Z2 edge spacing distance. And so on, obtain the distance between the straight edge Za-1 and the straight edge Za in the straight edge of the first middle frame to obtain the Za-1 edge spacing distance.

[0159] Obtain the time difference between the sampling time points of Z1 and Z2 straight edges to get the Z1 straight edge time difference; obtain the time difference between the sampling time points of Z2 and Z3 straight edges to get the Z2 straight edge time difference; and so on, obtain the time difference between the sampling time points of Za-1 and Za straight edges to get the Za-1 straight edge time difference.

[0160] The imaging linear velocity of the first straight edge is obtained by calculating the distance from the Z1 edge spacing to the Za-1 edge spacing and the time difference between the Z1 straight edge and the Za-1 straight edge.

[0161] The linear velocity of the image on the first straight edge is calculated using the following formula:

[0162] ;

[0163] Where Cxx1 is the imaging linear velocity of the first straight edge, Jlci is the Zi edge line spacing distance, Zsci is the Zi straight edge time difference, and a is the quantity value corresponding to the sample straight edge image;

[0164] Repeat the process of obtaining the imaging line velocity of the first straight edge, and obtain the imaging line velocities of the straight edges corresponding to the second, third and fourth middle frame straight edges respectively, to obtain the imaging line velocities of the second, third and fourth straight edges.

[0165] The length values ​​of the straight edges of the first, second, third, and fourth middle frames are obtained respectively.

[0166] Sum the length values ​​of the first straight edge to the fourth straight edge to obtain the total length value of the straight edges of the middle frame;

[0167] The target device's straight-edge imaging speed is obtained by calculating the length values ​​of the first straight edge to the fourth straight edge, the imaging linear velocity of the first straight edge to the fourth straight edge, and the total length value of the straight edges of the middle frame.

[0168] The imaging speed along the straight edge of the target device is calculated using the following formula:

[0169] ;

[0170] Where Zcs is the straight edge imaging speed of the target device, Css1 to Css4 are the imaging linear speeds of the first straight edge to the fourth straight edge respectively, Zb1 to Zb4 are the length values ​​of the first straight edge to the fourth straight edge respectively, and Zlj is the total length value of the straight edges of the middle frame.

[0171] The above step S1 has the following advantages:

[0172] The mid-frame inspection instrument acquires multiple frames of images within the straight edge monitoring cycle, and combines time difference and distance monitoring data to dynamically adjust the imaging line speed. This ensures the comprehensiveness and efficiency of straight edge area inspection, avoiding the omission of details due to excessive speed and preventing the impact of slow speed on the production line cycle, thus providing a reliable guarantee for the straight edge quality of electronic device mid-frames.

[0173] Step S2: Monitor the imaging angular velocity of the mid-frame R-angle of the target electronic device, and obtain the imaging velocity of the target device R-angle based on the monitoring results;

[0174] Step S2 includes the following steps:

[0175] The four mid-frame R-corners corresponding to the target electronic device are obtained and named as the first mid-frame R-corner, the second mid-frame R-corner, the third mid-frame R-corner, and the fourth mid-frame R-corner, respectively.

[0176] The imaging angular velocity of the first middle frame R angle is monitored to obtain the imaging angular velocity of the first R angle;

[0177] Specifically as follows:

[0178] The time point at which the mid-frame detector begins to acquire images of the first mid-frame R-corner is designated as the first R-corner feature time point, and the time point at which the mid-frame detector begins and ends to acquire images of the first mid-frame R-corner is designated as the second R-corner feature time point. The first R-corner feature time point and the second R-corner feature time point are set as the sample R-corner monitoring cycle.

[0179] The images acquired by the mid-frame detector during the sample R-angle monitoring period are obtained frame by frame to obtain multiple sample R-angle images. The acquired sample R-angle images are set as P1R-angle image to PbR-angle image according to the order of acquisition time.

[0180] The image acquisition times corresponding to the P1R angle image to the PbR angle image are obtained respectively, thus obtaining the acquisition time points from the P1R angle to the PbR angle.

[0181] The image acquisition movement angles corresponding to the P1R angle image and the PbR angle image are obtained to obtain the movement angle of the P1 image;

[0182] Specifically as follows:

[0183] The center point of the R-angle region in the P1R-angle image is obtained to obtain the P1 angle feature point. The center point of the R-angle region in the P2R-angle image is obtained to obtain the P2 angle feature point. The arc intercepted by the P1 and P2 angle feature points in the R-angle of the first middle frame is obtained to obtain the P1 feature arc. The center point of the circle corresponding to the P1 feature arc is obtained to obtain the P1 center point.

[0184] The line connecting the center point of P1 and the angular feature point of P1 is set as the first center angle line, and the line connecting the center point of P1 and the angular feature point of P2 is set as the second center angle line.

[0185] The angle between the first and second central angle lines at the center point P1 is obtained to get the central angle of P1 in radians. The angle value of the central angle of P1 in radians is obtained to get the image movement angle of P1.

[0186] The image acquisition movement angles corresponding to the P2R and P3R angle images are obtained to obtain the P2 image movement angle. The image acquisition movement angles corresponding to the P3R and P4R angle images are obtained to obtain the P3 image movement angle. Similarly, the image acquisition movement angles corresponding to the Pb-1R and PbR angle images are obtained to obtain the Pb-1 image movement angle.

[0187] Obtain the time difference between the P1R angle acquisition time point and the P2R angle acquisition time point to obtain the P1R angle time difference; obtain the time difference between the P2R angle acquisition time point and the P3R angle acquisition time point to obtain the P2R angle time difference; and so on, obtain the time difference between the Pb-1R angle acquisition time point and the PbR angle acquisition time point to obtain the Pb-1R angle time difference.

[0188] The first R-angle imaging angular velocity is obtained by calculating the time difference between the P1 image movement angle and the Pb-1 image movement angle, as well as the time difference between the P1R angle and the Pb-1R angle.

[0189] The imaging angular velocity of the first R angle is calculated using the following formula:

[0190] ;

[0191] Where Rxx1 is the first R-angle imaging angular velocity, Rlci is the Pi image movement angle, Rsci is the RiR angle time difference, and b is the quantity value corresponding to the sample R-angle image;

[0192] Repeat the process of obtaining the imaging angular velocity of the first R angle, and obtain the linear imaging angular velocities corresponding to the second, third, and fourth middle frame R angles respectively, to obtain the imaging angular velocities of the second, third, and fourth R angles.

[0193] The average of the imaging angular velocities from the first R-angle to the fourth R-angle is calculated to obtain the R-angle imaging velocity of the target device.

[0194] The following advantages exist in step S2 above:

[0195] For the critical appearance feature of the radius (R-angle), the mid-frame inspection instrument acquires multiple frames of images within the R-angle monitoring cycle, combining time difference and angle monitoring data to achieve precise control of the imaging angular velocity. This effectively solves the inspection problem caused by the smooth curvature of the R-angle, ensuring that the equipment can capture the R-angle image at the optimal angular velocity during rotation or movement, avoiding blurring or omissions caused by improper speed. It can efficiently identify subtle defects such as vertical lines and white spots in the R-angle area, while improving inspection adaptability through real-time angular velocity adjustment, ensuring the appearance accuracy and process requirements of the R-angle of the electronic device's mid-frame.

[0196] Step S3: Control the imaging speed of the mid-frame detector based on the imaging speed of the target device's R-angle and the imaging speed of the target device's straight edge;

[0197] Step S3 includes the following steps:

[0198] The imaging speed at the R-angle of the target device and the imaging speed at the straight edge of the target device are obtained respectively, and reasonable ranges for the imaging speed at the R-angle and the imaging speed at the straight edge are set respectively.

[0199] The R-angle image acquisition speed of the mid-frame detector is controlled based on the R-angle imaging speed of the target device and the reasonable range of the R-angle imaging speed.

[0200] Specifically as follows:

[0201] If the R-angle imaging speed of the target device is greater than the upper limit of the reasonable range of R-angle imaging speed, then the R-angle image acquisition speed corresponding to the mid-frame detector will be adjusted downward until the R-angle imaging speed of the target device is within the reasonable range of R-angle imaging speed.

[0202] If the R-angle imaging speed of the target device is less than the lower limit of the reasonable range of R-angle imaging speed, then the R-angle image acquisition speed corresponding to the mid-frame detector will be adjusted upward until the R-angle imaging speed of the target device is within the reasonable range of R-angle imaging speed.

[0203] If the R-angle imaging speed of the target device is within a reasonable range, then there is no need to adjust the R-angle imaging speed.

[0204] The straight edge image acquisition speed of the mid-frame detector is controlled according to the reasonable range of the straight edge imaging speed and the R-angle imaging speed of the target device.

[0205] Specifically as follows:

[0206] If the straight edge imaging speed of the target device is greater than the upper limit of the reasonable range of straight edge imaging speed, the straight edge image acquisition speed corresponding to the mid-frame detector will be adjusted downward until the straight edge imaging speed of the target device is within the reasonable range of straight edge imaging speed.

[0207] If the straight edge imaging speed of the target device is less than the lower limit of the reasonable range of straight edge imaging speed, the straight edge image acquisition speed corresponding to the mid-frame detector will be adjusted upward until the straight edge imaging speed of the target device is within the reasonable range of straight edge imaging speed.

[0208] If the straight-edge imaging speed of the target device is within a reasonable range, then there is no need to adjust the straight-edge imaging speed.

[0209] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to any specific implementation. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. An imaging speed control system for a mid-frame detector, characterized in that, include: Straight-edge imaging module: monitors the imaging speed of the straight edges of the mid-frame of the target electronic device, and performs comprehensive analysis on the monitoring results to obtain the straight-edge imaging speed of the target device; R-angle imaging module: monitors the imaging angular velocity of the mid-frame R-angle of the target electronic device and obtains the R-angle imaging velocity of the target device based on the monitoring results; Speed ​​control module: Controls the imaging speed of the mid-frame detector based on the imaging speed of the target device's radius (R-angle) and straight edge (straight edge). The specific details of the imaging speed control for the mid-frame detector are as follows: Set reasonable ranges for R-angle imaging speed and reasonable ranges for straight-edge imaging speed respectively; The R-angle image acquisition speed of the mid-frame detector is controlled based on the R-angle imaging speed of the target device and the reasonable range of the R-angle imaging speed. The straight edge image acquisition speed of the mid-frame detector is controlled based on the straight edge imaging speed of the target device and the reasonable range of the straight edge imaging speed. Specifically as follows: If the straight edge imaging speed of the target device is greater than the upper limit of the reasonable range of straight edge imaging speed, the straight edge image acquisition speed corresponding to the mid-frame detector will be adjusted downward until the straight edge imaging speed of the target device is within the reasonable range of straight edge imaging speed. If the straight edge imaging speed of the target device is less than the lower limit of the reasonable range of straight edge imaging speed, the straight edge image acquisition speed corresponding to the mid-frame detector will be adjusted upward until the straight edge imaging speed of the target device is within the reasonable range of straight edge imaging speed. If the straight-edge imaging speed of the target device is within a reasonable range, then there is no need to adjust the straight-edge imaging speed.

2. The imaging speed control system for a mid-frame detector according to claim 1, characterized in that, The imaging speed at the straight edge of the target device is obtained, as follows: The target electronic device is obtained by acquiring the mid-frame image of the electronic device that is currently acquiring the mid-frame image of the mid-frame detector. The four straight edges of the middle frame corresponding to the target electronic device are obtained and named as the first straight edge of the middle frame to the fourth straight edge of the middle frame, respectively. The imaging linear velocity of the first straight edge of the first middle frame is monitored to obtain the imaging linear velocity of the first straight edge. Obtain the linear velocity of the line corresponding to the straight edge of the second middle frame to the straight edge of the fourth middle frame, and obtain the linear velocity of the line from the second straight edge to the fourth straight edge. Obtain the length values ​​of the straight edges corresponding to the straight edges of the first middle frame to the fourth middle frame, and get the length values ​​of the first straight edge to the fourth straight edge. Sum the length values ​​of the first straight edge to the fourth straight edge to obtain the total length value of the straight edges of the middle frame; The target device's straight-edge imaging speed is obtained by calculating the length values ​​of the first straight edge to the fourth straight edge, the imaging linear velocity of the first straight edge to the fourth straight edge, and the total length value of the straight edges of the middle frame.

3. The imaging speed control system for a mid-frame detector according to claim 2, characterized in that, The linear velocity of the first straight edge is obtained as follows: During the imaging linear velocity analysis of the straight edge of the first middle frame, a sample straight edge monitoring cycle is set. The images collected by the mid-frame detector during the sample straight edge monitoring period are acquired frame by frame to obtain the Z1 straight edge image to the Za straight edge image; The image acquisition times corresponding to the Z1 straight edge image to the Za straight edge image are obtained respectively, thus obtaining the acquisition time points from the Z1 straight edge image to the Za straight edge image. By analyzing the acquisition distance from the straight edge image of Z1 to the straight edge image of Za, the distance between the Z1 edge spacing and the Za-1 edge spacing is obtained. Obtain the time difference between the sampling time point of Z1 straight edge and the sampling time point of Z2 straight edge to obtain the Z1 straight edge time difference. Obtain the time difference between the sampling time point of Z2 straight edge and the sampling time point of Z3 straight edge to obtain the Z2 straight edge time difference. Continue obtaining these values ​​until the time difference between the sampling time points of Za-1 straight edge and Za straight edge is obtained to obtain the Za-1 straight edge time difference. Here, 'a' represents the number of sample straight edge images. The imaging linear velocity of the first straight edge is obtained by calculating the distance from the Z1 edge spacing to the Za-1 edge spacing and the time difference between the Z1 straight edge and the Za-1 straight edge.

4. The imaging speed control system for a mid-frame detector according to claim 3, characterized in that, The edge spacing distance is obtained as follows: Obtain the center point of the straight edge region in the Z1 straight edge image, and draw a straight line perpendicular to the ground through the center point of the straight edge region to obtain the Z1 straight edge line. Obtain the center point of the straight edge region in the Z2 straight edge image, and draw a straight line perpendicular to the ground through the center point of the straight edge region to obtain the Z2 straight edge line. Continue this process until the center point of the straight edge region in the Za straight edge image is obtained, and a straight line perpendicular to the ground is drawn through the center point of the straight edge region to obtain the Za straight edge line. Obtain the distance between the straight edge Z1 and the straight edge Z2 in the straight edge of the first middle frame to obtain the Z1 edge spacing distance. Obtain the distance between the straight edge Z2 and the straight edge Z3 in the straight edge of the first middle frame to obtain the Z2 edge spacing distance. Continue obtaining these distances until the distance between the straight edge Za-1 and the straight edge Za in the straight edge of the first middle frame is obtained to obtain the Za-1 edge spacing distance.

5. The imaging speed control system for a mid-frame detector according to claim 1, characterized in that, The imaging velocity at the R-angle of the target device is obtained, as detailed below: The four mid-frame R-corners corresponding to the target electronic device are obtained, and the four obtained mid-frame R-corners are named as the first mid-frame R-corner to the fourth mid-frame R-corner, respectively. The imaging angular velocity of the first middle frame R angle is monitored to obtain the imaging angular velocity of the first R angle; The imaging angular velocities corresponding to the second R-angle to the fourth R-angle are obtained respectively, thus obtaining the imaging angular velocities from the second R-angle to the fourth R-angle; The average of the imaging angular velocities from the first R-angle to the fourth R-angle is calculated to obtain the R-angle imaging velocity of the target device.

6. The imaging speed control system for a mid-frame detector according to claim 5, characterized in that, The imaging angular velocity of the first R-angle is obtained as follows: During the imaging angular velocity analysis of the first middle frame's R-angle, a sample R-angle monitoring cycle is set. The images collected by the mid-frame detector during the sample R-angle monitoring period are acquired frame by frame to obtain the P1R-angle image to the PbR-angle image; The image acquisition times corresponding to the P1R angle image to the PbR angle image are obtained respectively, thus obtaining the acquisition time points from the P1R angle to the PbR angle. The image acquisition movement angles corresponding to the P1R and P2R angle images are obtained to get the movement angle of the P1 image; The image acquisition movement angles corresponding to the P2R and P3R angle images are obtained to obtain the P2 image movement angle. This process is repeated until the image acquisition movement angles corresponding to the Pb-1R and PbR angle images are obtained to obtain the Pb-1 image movement angle. Obtain the time difference between the P1R angle acquisition time point and the P2R angle acquisition time point to obtain the P1R angle time difference; obtain the time difference between the P2R angle acquisition time point and the P3R angle acquisition time point to obtain the P2R angle time difference; and so on, until the time difference between the Pb-1R angle acquisition time point and the PbR angle acquisition time point is obtained to obtain the Pb-1R angle time difference; b is the number of sample R-angle images; The first R-angle imaging angular velocity is obtained by calculating the time difference between the P1 image movement angle and the Pb-1 image movement angle, as well as the time difference between the P1R angle and the Pb-1R angle.

7. The imaging speed control system for a mid-frame detector according to claim 6, characterized in that, The movement angle of image P1 is obtained as follows: The center point of the R-angle region in the P1R-angle image is obtained to obtain the P1 angle feature point. The center point of the R-angle region in the P2R-angle image is obtained to obtain the P2 angle feature point. The arc intercepted by the P1 and P2 angle feature points in the R-angle of the first middle frame is obtained to obtain the P1 feature arc. The center point of the circle corresponding to the P1 feature arc is obtained to obtain the P1 center point. The line connecting the center point of P1 and the angular feature point of P1 is set as the first center angle line, and the line connecting the center point of P1 and the angular feature point of P2 is set as the second center angle line. The angle between the first and second central angle lines at the center point P1 is obtained to get the central angle of P1 in radians. The angle value of the central angle of P1 in radians is obtained to get the movement angle of the P1 image.

8. The imaging speed control system for a mid-frame detector according to claim 1, characterized in that, The acquisition speed of the R-angle image is controlled as follows: If the R-angle imaging speed of the target device is greater than the upper limit of the reasonable range of R-angle imaging speed, then the R-angle image acquisition speed corresponding to the mid-frame detector will be adjusted downward until the R-angle imaging speed of the target device is within the reasonable range of R-angle imaging speed. If the R-angle imaging speed of the target device is less than the lower limit of the reasonable range of R-angle imaging speed, then the R-angle image acquisition speed corresponding to the mid-frame detector will be adjusted upward until the R-angle imaging speed of the target device is within the reasonable range of R-angle imaging speed. If the R-angle imaging speed of the target device is within a reasonable range, then there is no need to adjust the R-angle imaging speed.

9. A method for controlling the imaging speed of a mid-frame detector, applicable to the imaging speed control system of a mid-frame detector as described in any one of claims 1-8, characterized in that, The control method includes: Step S1: Monitor the imaging speed of the straight edge of the midframe of the target electronic device, and perform comprehensive analysis on the monitoring results to obtain the imaging speed of the straight edge of the target device; Step S2: Monitor the imaging angular velocity of the mid-frame R-angle of the target electronic device, and obtain the imaging velocity of the target device R-angle based on the monitoring results; Step S3: Control the imaging speed of the mid-frame detector based on the imaging speed of the target device's radius (R-angle) and straight edge (straight edge). The imaging speed control of the mid-frame detector is as follows: Set reasonable ranges for R-angle imaging speed and reasonable ranges for straight-edge imaging speed respectively; The R-angle image acquisition speed of the mid-frame detector is controlled based on the R-angle imaging speed of the target device and the reasonable range of the R-angle imaging speed. The straight edge image acquisition speed of the mid-frame detector is controlled based on the straight edge imaging speed of the target device and the reasonable range of the straight edge imaging speed. Specifically as follows: If the straight edge imaging speed of the target device is greater than the upper limit of the reasonable range of straight edge imaging speed, the straight edge image acquisition speed corresponding to the mid-frame detector will be adjusted downward until the straight edge imaging speed of the target device is within the reasonable range of straight edge imaging speed. If the straight edge imaging speed of the target device is less than the lower limit of the reasonable range of straight edge imaging speed, the straight edge image acquisition speed corresponding to the mid-frame detector will be adjusted upward until the straight edge imaging speed of the target device is within the reasonable range of straight edge imaging speed. If the straight-edge imaging speed of the target device is within a reasonable range, then there is no need to adjust the straight-edge imaging speed.

Images