Eurotherm TC3001 User Manual page 13

Transit Inspector Pro
by camera configuration (minimum distance — 3 m, maximum distance — 30 m), see
number recognizer on page
meters.
On sensor applying (see
should not be one-coloured.
There are some guidelines for choosing and setting up video cameras. For list of recommended
cameras see 7 Appendix A: Recommended Cameras
Warning! Wrong installation may cause carriage numbers recognition errors.
Camera type. Use a standard analog video camera. It is recommended to use a monochrome
camera with high resolution and 1/2" or 1/3" interleave transfer sensor.
Camera objective type. It is helpful to use cameras with auto-zoom lenses. The upper limit of
the focal length must be more then 80 mm. These lenses allow you to get contrast images of
carriages from any distances. Set up the aperture to reach the result when a distance between
bay and freight car top takes up all frame on the screen width.
Camera features. Automatic focus and levelling quaking image features has to be disable.
Camera with auto-aperture (ELC). Auto-aperture may be used when there are no quick bright-
ness changes within the camera view. In other cases, this feature has to be turned off.
To setup the iris diaphragm:
1. Turn the objective to auto-aperture work
2. Almost shade the camera aperture
3. Make some snap-shots of carriages
4. Watch the created images from the video-archive
If these images are blurry, slightly open the aperture and repeat the procedure.
Electronic shutter. Use cameras with high resolution and manual exposure time of 1/2000 or
1/5000 seconds.
Sensitivity. It is recommended to use cameras with high sensitivity (for darkened conditions),
e. g. 0.1–0.001 lux.
Camera angle of rotation. Mount a camera in such a way that the horizontal level of the
camera does not deviate from the horizon more than 10 .
Camera angle of inclination. The best camera position is that the carriages move transversely
to camera view. Some deviations are acceptable: horizontal — not more than 10 and vertical —
not more than 40 .
Warning! On system deploying picture frequency from recognition camera has to be not less
than 25 fps to see each carriage number completely at least on three contiguous frames at
common carriage velocities.
13
Deploying Module
25 for more information. Cameras has to be mounted at a height of 2–4
3.2.6 Sensors on page
www.isscctv.com
15 for more information) camera view background
on page 59.
User Guide
4.2.3 Transit: