Abekas AirCleaner, Руководство пользователя

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46 AirCleaner • User Guide
4. Operations
Theory of Operation
Theory of Operation
The basic operation of AirCleaner is described and illustrated in the following series
of diagrams. For the sake of simplicity, only the video pathway is described, and the
basic increment of time in the illustrations is one second (with up to 30 frames
included in each second, depending on the video format).
In this operational example, AirCleaner is programmed with the following significant
parameters:
•
Screeners = One
•
Total PGM Delay = 40:00
•
Video Reaction 1 = 2:00
•
On Video Trigger = Defocus
•
Defocus Ramp = 0:00
This example begins at an arbitrary “time zero” (00:00) as illustrated by the stop
watch timer. As this example progresses, the stop watch timer advances as the
violation segment of video shifts rightward through the video pipeline.
The real-time defocus engine is positioned at the end of the video pipeline in
AirCleaner, and is normally switched out of the video pathway. As you will see, when
the first video frame that is marked as the start of violation reaches the end of the
delay pipeline, AirCleaner then automatically switches the video output to the
processed output of the real-time defocus engine.
1.
TIME 00:00 |
At the left edge of the illustration below, there are “violation”
frames (marked with an X ) advancing towards the Screener’s video monitor
and input to AirCleaner. The screening operator doesn’t yet know this, but the
first frame of this violation will reach his screening monitor in 5 seconds (as
depicted by the five one-second squares between the violation video and the
video input to AirCleaner). The “
0
” frame will also advance through the delay.
Figure 4-1. Theory of Operation Example: Elapsed Time of 00:00 seconds