JAI Vehicle Imaging Subsystem 300, Руководство по установке

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VIS CAM 300/400 Installation Manual
Introduction
operations, such as frame store, JPEG compression, vehicle fingerprint extraction, license plate find,
running applications, and so on.
When the TLS-300 Traffic Light Sensor is used to control the VISCAM exposure settings, no moving
parts (such as an auto-iris lens) are included in the VIS system. This helps ensure high reliability for the
system.
A 12.5 mm to 75 mm manual zoom lens is provided as a standard with the VISCAM 300. This allows
the VISCAM to be mounted in a wide range of positions while ensuring sufficient resolution on the
vehicle license plates. A 35 mm fixed focal length lens is provided standard with the VISCAM 400. A
zoom lens is also available as an option. An anti-glare polarizing filter is mounted in front of the lens to
reduce smear in the picture caused by sun glints.
1.3.3 Illumination
1.3.3 (a) TNF-31 Flash
The TNF-31 Flash generates light in wavelengths that are invisible to the human eye, but visible to the
camera. This makes the flash suitable for illuminating both oncoming and receding views of traffic.
Unlike near-infrared illuminators, the TNF-31 yields high contrast images of license plates even if they
have red characters on white or yellow backgrounds.
The TNF-31 Flash is automatically enabled whenever the TLS-300 Light Sensor determines that
ambient light is insufficient to produce a picture of usable quality. When the TNF-31 is enabled, it fires
every time the vehicle detector triggers the camera.
1.3.3 (b) White light LED.
JAI offers White LEDs mounted inside the camera enclosure. This option is usually employed when
certain rare color combinations on license plates do not yield sufficient contrast with the TNF-31 Flash
option alone.
1.3.4 VJP-300 Junction Panel.
The VIS J-Panel is the central connection point for the VIS components. The J-Panel is a DIN-Rail
mounted PCB equipped with various interface terminals for interconnection of the VIS components;
this can be Ethernet connection, serial connection, TTL trigger feed and power supply. It offers the
possibility of manually selecting trigger polarity to the camera. Furthermore the J-Panel is equipped
with status LED’s and trigger switches for diagnostics and troubleshooting purposes.
1.3.5 RS485 Device Server.
The MOXA RS485 Device Server enables connection of RS485 serial devices to the Ethernet. The
purpose for the MOXA RS485 Device Server in the VIS system is to convert Ethernet to RS485
communication for the TLS-300 Light Sensor.