Bacteriostatic circle scanning correction template

Jane Medium ： Use the standard template to correct the measurement proportion of bacteriostasis circle , It can minimize the influence of the up and down movement of the antibacterial circle tray on the measurement results during production and use . For measurements in this regard, see Use the contour area of the circle to calculate the radius of the ring ：cv2.findContours, contourArea For the change of measurement results caused by vertical movement .

key word ： correction , Templates

 

§01 school Positive template

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1.1 Correction template

   stay Scan the standard shadow circle template In the experiments , The scanner distortion is tested . stay Scanner standard template sliding acquisition image and its processing As a result , The influence of the height of the tray of the bacteriostatic circle on the size is much greater than Errors caused by scanner movement .

▲ chart 1.1.1 Template for calibrating the scanner

   One method for correction is based on the existing pallet , A standard correction plate is placed on the chassis to obtain the corresponding correction accuracy . The template can be made by STM Laser steel mesh To process . utilize STM Laser steel mesh A standard calibration template is pasted at the bottom of the bacteriostatic ring , It can ensure the consistency of bacteriostasis circle .

▲ chart 1.1.1 STM Laser steel mesh

1.2 Formwork design

1.2.1 Design documents

AD\XQWF\2022\Template

1.2.2 Design parameters

   According to the requirements , The size of steel that can be processed by the other party is 28 centimeter ×36 centimeter . Next, design a corresponding size PCB Territory .

   Here is 14 Design of groups of circles of different sizes . Circle used TOPLayer Of PAD, Set their corresponding parameters ：

PAD_ Parameters ：

shape ：Round
X-Size：10,12,14,16,18,20,22
Y-Size：10,12,14,16,18,20,22

▲ chart 1.2.1 STM Steel mesh template file

 

※ set up Summary of calculation ※

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   benefit Use the standard template to correct the measurement proportion of bacteriostasis circle , It can minimize the influence of the up and down movement of the antibacterial circle tray on the measurement results during production and use . For measurements in this regard, see Use the contour area of the circle to calculate the radius of the ring ：cv2.findContours, contourArea For the change of measurement results caused by vertical movement .

▲ chart 2.1 Measure the change of measurement result caused by the vertical movement of the target

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■ Links to related literature :

• Scan the standard shadow circle template
• Scanner standard template sliding acquisition image and its processing
• STM Laser steel mesh
• utilize STM Laser steel mesh
• Use the contour area of the circle to calculate the radius of the ring ：cv2.findContours, contourArea

● Related chart Links :

• chart 1.1.1 Template for calibrating the scanner
• chart 1.1.1 STM Laser steel mesh
• chart 1.2.1 STM Steel mesh template file
• chart 2.1 Measure the change of measurement result caused by the vertical movement of the target