Gatekeeper SP-210 Manuel utilisateur

Rev 2.0

Gatekeeper Student Protector SP-210 System

Stop Arm Camera Installation Guide

Note:

This document describes the installation and aim of the cameras associated with Gatekeepers Stop

Arm Camera System.

A firmware configuration guide is available that describes how to configure a Nitro 404 DVR for use with

the Gatekeeper Stop Arm Camera System.

A hardware installation document is available that describes to wire the various hardware components

associated with Gatekeepers Stop Arm Camera System.

Copies of these documents are available by calling Gatekeeper Service Support at 604.864.6187

Rev 2.0

Gatekeeper Student Protector SP-210 System

Stop Arm Cameras Installation Guide

One of the most important issues when installing a SP-210 system is the placement of the cameras and

the subsequent aiming. The SP-210 should be mounted to the side of a bus and aimed as per the

diagrams below.

Figure 1

General Information

Aim the SP100 and the SP210 towards the rear so that they are more protected from rain, sleet,

hail snow, road spray etc. Note: If your state/province only requires a single rear license plate,

one of the two SP-210 cameras must be mounted aiming forward.

The SP-100 (overview camera) comes from the factory oriented to face the rear of the bus. If

this camera is mounted facing forward the image will be upside down. The SP-210 (license

plate capture camera) can be configured to face either forwards or backwards - see Figure 7.

The cameras should be mounted between the two black rub rails found on most school busses.

See Figure 1. If the bus does not have the black rub rail mount the cameras high enough so

they are not in the spray of the front tires. Do not mount the cameras too high (usually above

4.5 feet from the ground (approximately)). While we want the cameras high enough to avoid

road spray from the tires and passing vehicles we also want to minimize the vertical angle from

the camera to the license plate of passing vehicles.

Park the bus in a location where there is sufficient room on the drivers side to park a vehicle for

camera aiming purposes.

Rev 2.0

The SP100 (overview camera) must be mounted forward of the stop arm aimed towards the

rear. See Figure 1. Note: With some newer busses the front body work is curved inwards.

Before drilling holes test the mounting location to see that it is possible to aim the camera

correctly.

Positioning of the cameras as indicated in Figure 1 typically allows cables to be routed through

interior channels that can be accessed by removing the covers.

The SP-210 utilizes infrared illumination technology. Due to this the image is black and white

and will often appear dark. The reflectivity of the license plate is key for this camera to function

correctly. Aiming the camera at a non reflective surface will often result in a black image. This

is most often seen when the camera is indoors and being tested. This is normal. The only way

to see if the camera is operating correctly is to aim the camera at a reflective license plate.

3M is a major supplier of the reflective material that is used in license plates. 3M guarantees

the plates reflectivity for 5 years. 3M also has stated that a useful life of the reflective plate is

about 7 years. Plates older than 7 year may not have sufficient reflectivity to allow for a clear

image to be captured. In this case the plate will appear gray and the plate characters may not

be readable.

Damaged license plate can also be problematic. If the reflectivity material on a license plate is

damaged or chipped one will see dark spots on the image of the plate.

Note: Other documentation is provided to configure the Gatekeeper Systems N404 DVR and is

not included here.

Mounting and Aiming of Rear Facing SP100 and SP210

Please be aware of the following when positioning the SP210:

oWhen the SP-210 is mounted between the black rub rails on the side of the bus, make

sure there is sufficient room for the protective shroud to be installed on the SP210 frame

after the frame has been screwed to the bus.

oTypically the SP-210 is angled down about 10 to 15 degrees – see Figure 1 for the

relative mounting position. While there is flexibility to angle the SP-210 downward after

the frame is screwed to the bus, it is important to get the aiming as close as possible

before the SP-210 camera frame is mounted to the bus. Be careful to not strip the

supplied TEK screws by over tightening them.

In order to aim the rear facing cameras masking tape should be placed on the road beside the

bus so as to locate the position of a vehicle. Once the position is determined then a vehicle

should be parked in the target position while the camera is being aimed. See Figure 3.

Place masking tape on the ground 22 feet back from the location of the SP-210 and 6 feet out

from the bus. See Figure 2 for geometry. Position a vehicle to be used for aiming at the

masking tape. See Figure 3.

The SP-100 should be aimed so that it captures the bottom of the stop arm when the stop arm

is deployed. See Figure 4.

The SP-100 is provided with a poly base. This is to ensure that the camera is not grounded to

the bus. If the camera is grounded to the bus degraded video may result.

Rev 2.0

Figure 2 – Aiming Geometry For Rear Facing Cameras

Figure 3 Vehicle positioned within tape marks for aiming of the cameras

22 feet

6 feet

School Bus

Target

Vehicle

SP100 Overview

Camera on Side

of Bus

SP210 Camera

on Side of Bus

Rev 2.0

Figure 4 – view from SP100 – Overview camera – The deployed stop arm is at the top of the image

Before drilling any holes in the bus it is strongly recommended that the cameras be held against

the side of the bus and aimed. By connecting a monitor to the “video out” connector of the

Gatekeeper Systems N404 DVR a live image can be viewed.

The positioning of the SP-210 camera is critical.

Again: It is strongly recommended that the SP210 be held against the side of the bus and

aimed before drilling any holes.

Rev 2.0

Use the supplied grommet so that the metal of the bus does not cut into the camera cable when

it is routed through the exterior of the bus.

The SP210 should be aimed so that the resulting image appears as in Figure 5 when the

vehicle is located 22 back and 6 feet away from the bus.

This aiming should be considered preliminary aiming only. It is strongly recommended that final

aiming be done with drive bys when the bus is located on a typical road that it will run on – see

section – Final Aiming

The SP-210 has 2 knobs at the bottom to zoom and focus the camera.

Loosen the two protruding screws on the SP-210, one screw adjusts the zoom level and the

other adjusts the focus. Note: these two adjustments interact with each other so the focus must

to be reset when zoom level is changed. When the correct zoom and focus is achieved, tighten

the screws. Be sure to not over tighten them.

Cable passes through this slot

Fasten supplied Tek screws in the curved slots

Cable passes through this slot

Fasten supplied Tek screws in the curved slots

Cable passes through this slot

Fasten supplied Tek screws in the curved slots

Rev 2.0

Figure 5 – Aiming and zoom example when vehicle is 22 feet back and 6 feet away from the bus.

Locating and Mounting a Second Forward Facing SP-210

In States/Provinces that only require vehicles to have rear license plates a second SP-210 will

be required in order to capture license plate images of vehicles passing a bus in both directions

(back to front and front to back).

Locating and aiming a second, front facing SP-210 is very similar to aiming the rear facing SP-

210

The front facing SP210 should be located behind the stop arm so that it has a clear view of the

target vehicle when the stop arm is deployed and the target vehicle is 22 feet and 6 feet away

from the SP-210 camera. See Figure 6.

It is recommended that a live image be viewed by connecting a monitor to the “video out”

connector of the N404 DVR.

While viewing the live image on the monitor, test position the SP-210 watching for the following:

oField of view is not obstructed by deployed stop arm

oIR from the rear facing SP-210 camera is not visible in the front facing SP-210

oIR from the front facing SP-210 camera is not visible in the rear facing SP-210

Usually the Front facing SP-210 is located approximately 5 to 6 feet behind the stop arm.

Once the position is identified screw the SP-210 to the bus using the supplied Tek screws.

Rev 2.0

Figure 6 – Aiming Geometry For Front Facing Cameras

SP-100 and SP-210 Image Orientation

The SP-100 is shipped for installation facing the rear of the bus. If The SP-100 is mounted facing

forward the image will be inverted. Therefore mount the SP-100 facing the rear of the Bus.

The orientation of the image can be changed in the SP-210. This is required whether the camera is

aimed forwards or backwards. The camera cylinder (inside the SP-210) has a collar secured around

the camera. The collar is attached to the camera cylinder with the middle bolts. See Figure 7. The two

outside bolts secure the collar to the SP-210 mounting base. In order to correctly orientate the image

correctly remove the collar from the mounting base. This is done by removing the two outside bolts.

Flip the camera over and reattach the collar to the mounting base using the bolts.

SP-210 cameras will ship with the correct orientation. However if the orientation needs to be changed,

because the image is upside down, follow the above procedure.

Rev 2.0

Figure 7 – SP-210 Collar and Bolts

Final Aiming

Initial aiming of the SP210 and the SP100 should be done as indicated previously in this

document.

For final aiming it is recommended that the bus be parked in the center of the lane on a

road that it would normally travel on.

Then deploy the stop arm and drive a vehicle past the bus with the Stop Arm camera system

operational.

The vehicle should make two passes – from back to front of bus and then from front to back

of bus.

For the first two passes the test vehicle should be driven very close to the bus in the adjacent

lane.

The next two passes the test vehicle should be in the center of the adjacent lane.

For the last two passes the vehicle should be driven so that it hugs the shoulder of the

adjacent lane.

Review the video and then fine tune the aiming of the SP-210 and SP-100. In most

cases the SP-100 will not have to adjusted however in Gatekeepers Systems

experience the SP-210 usually needs to be fine tuned (with respect to aiming) to

capture the license plates of the passing vehicle.

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