In the last issue, we talked about how the image of the electronic X-ray inspection machine can be zooming in and zooming out. However, how much did it zoomed in and zoomed out, that is, how is the magnification calculated?
Let’s figure out the definitions of several terms at first:
From the figure above, we can see that the actual diameter of the object is A. After the object is penetrated by the X-ray from the X-ray source, it is projected on the flat panel detector. The projected diameter on the flat panel detector is B, which is called geometry magnification. The diameter displayed on the computer screen is C, which is called system magnification.
Here are two terms related to distance.
FOD (Focus to object distance): X-ray source focus to object distance
FDD (Focus to detector distance): X-ray source focus to flat panel detector distance
Then, the magnification can be divided into two types:
Geometric Magnification = B / A = FDD / FOD
System magnification = C / A
Well, this is how the magnification of the electronic X-ray inspection machine is calculated.
But why does WELLMAN electronic X-ray inspection machine not display the current magnification on the software? In this way, we know the magnification of each product should be! That’s because we have a better choice.
WELLMAN electronic X-ray inspection machine can save the inspection parameters of tens of thousands of products, including magnification, voltage, current contrast, the X-ray source, and flat-panel detector position, etc., which can be called directly next time. So there is no need to display the current magnification on the software, just let the software remember it for you.