JAI VIS-CAM System, Руководство по установке

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System Set-Up 33
VIS-CAM Systems
4 System Set-Up
This section provides a generic procedure for aligning one or more of the VIS CAM cameras and their associated
equipment at a site. If you received a specific installation manual from JAI for your project then follow those
instructions instead of the procedure described here.
The example installation process described in this section assumes that:
•
The cameras are being mounted on an overhead structure directly over the lane(s) being
observed. The process for aligning a camera mounted at the side of a lane is essentially the
same as aligning a single camera mounted directly over the lane.
•
The site employs an accurate vehicle detection device that outputs a discrete TTL signal to the
VIS system whenever the back (or front) of a vehicle crosses a fixed line across the road. This
line is referred to as the “trigger line” in this document. Examples of such triggering devices
are: Peak’s trafficLoop, STI’s Vehicle Detector light curtain, and JAI’s Laser Vehicle Detector.
•
License plate reading or vehicle matching is performed on the images produced by the VIS
system. In these cases, precise location and alignment of the cameras is critical to project
success. If the VIS images are only for human interpretation, then achieving the exact camera
alignment is much less critical.
•
The installer is familiar with using the ENSetup program supplied by JAI. Please refer to the
ENSetup Program User’s Guide if you are unfamiliar with this software. JAI offers engineering
support and software tools to help select the optimum camera and trigger locations to meet
your specific project needs. Contact ITS Engineering Support at (408) 383-0300 for further
information about obtaining JAI assistance.
4.1 Preparation for Alignment
4.1.1 Pre-Alignment Checklist
• Make sure you have a JAI supplied setup computer with the ENSetup program installed.
•
The Setup computer needs to have an Ethernet network adapter installed (preferably 1 Gigabit
Ethernet Adapter) and the TCP/IP network configured with the correct IP-address, subnet-mask
and default-gateway.
•
The Setup computer and the cameras need to be on the same subnet. The cameras are shipped
with the standard IP-address “10.0.0.65” and subnet-address “255.255.255.0”, and the Setup
computer needs to be assigned an IP-address “10.0.0.xx” in order to automatically discover the
cameras using the ENSetup program (NB! “xx” must not be “65”).
•
All cameras have to be given unique IP-addresses before the alignment begins. This is done using
the ENSetup application.
•
Confirm all VIS CAM components and cables are properly connected.
4.1.2 Select a Suitable Vehicle, License Plate, and Plate Stand for the Setup
To accurately set up the Vehicle Imaging Subsystem, the system installers need access to: