With the image detection algorithm the Optical image graph (See Figure 2 for explanation) should look like Figure 1, right side. The vertical dotted line indicates the position of the shadow edge. For empty pipe, the optical image looks like Figure 1, left side. The soft key SLOPE leads to a graph (see Figure 2) showing the slope (or first differential) of the optical image graph in Figure 1.
| In case there is no signal from the sensor, the image field is crossed over. |
The optical image changed slightly with sensor program version 3.13. The optical image starts now at origin and the sides of the image are straight and slope slightly. This is done programmatically, it is not a property of the optical module.
