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№ | Property | Range | Comment |
1 | Camera type | Analog color PAL camera, or analog monochrome CCIR camera | IP cameras with not less than 25 fps and 4 Mbit/s bitrate also can be used. |
2 | Camera resolution | Not less than 480 TLV 320x240 |
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3 | Illuminance in the monitored area | Not less than 0.02 lux |
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4 | Signal/noise ration | 50 dB or more |
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5 | Auto aperture and auto electronic shutter | 1/1000 |
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6 | Focal length | 4-8 mm for 1/3'' CCD |
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If the camera meets the main requirements (see the General requirements for mounting and configuring of cameras section) and is aimed at the recommended directions, up to six lanes can be processed in case of a central camera location, and up to four lanes in case of a side location.
If recomendations for parameters, mounting and configuring video camera are fulfilled, the typical error of counting the following characteristics will be as follows:
- 5% - while determining number of vehicles;
- 10% - while determining average speed of moving;
- 10% - while determining average distance;
- 10% - while classifying vehicles.
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Depending on conditions of monitoring and factors of video camera mounting/configuring, errors can differ from typical error. |
Conditions of applicability of the Traffic Detector module are following:
- visibility of vehicle or vehicle headlight (at night) - not less than 50m;
- speed of vehicle - more than 20 km/h;
- statistical sampling - not less than 1000 vehicles.
When mounting the Traffic Detector cameras, follow these recommendations:
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