19
Theory of Operation
First, we must find the angle r by applying formulas from basic trigonometry:
tan r = (A/2)
and
Z
2
= (P/2)
2
+ D
2
F
Since we know A,F,P and Z can be calculated and the angle can be found using trigonometric tables. Once
the angle is known, we can use it in another trigonometry formula to find D:
D = (P/2)
tan r
Since we know P and r we can calculate D – we now know the distance the pen is from the camera.
Applying this to the 3D Aligner, the image analysis software takes each image and precisely measures the
size of each dot on the photograph – this is the perceived size (A). We already discussed the known values of
focal length (F) and size of the dots (P). Thus, using the above math the 3D Aligner can measure the distance
from the cameras to any dot on the targets and can do so with a high degree of accuracy – it can measure a
target 20 feet away to less than 1 mm accuracy.
Summary of Contents for UHR Ultra
Page 1: ...Service Manual Ultra UHR Ultra and V3400 WHEEL ALIGNER May 2014 ...
Page 13: ...11 AC DC POWER DISTRIBUTION ...
Page 14: ...12 AC DC POWER DISTRIBUTION ...
Page 16: ...14 Theory of Operation Figure 2 Top Field of View Figure1 Side Field of View ...
Page 19: ...17 Theory of Operation Configuration using single pole wheel clamp ...
Page 46: ...44 NOTES ...
Page 67: ...65 Diagnostics ...
Page 68: ...66 NOTES ...
Page 83: ......
Page 84: ...05 07 2014 2014 Impreso en U S A 309 Exchange Avenue Conway AR 72032 TEEWA546P4 Rev C ...