This guide covers the installation of a complex camera and object detection solution used on full-size motorcoaches (capacity 48-56 passengers). The system includes a rear backup camera with radar object detection, left and right side blindspot cameras with blindspot radar object detection, an interior camera for internal recording coverage, a driver facing display for left, right, and rear view, a DVR for full HD recording of all cameras, and an adapter for integration of all video for viewing in the Samsara Cloud.
The components are all interconnected but are broken down into sub-system groups for ease of understanding:
- Side Cameras and Blind Spot Radar
- Rear Camera and Rear Radar
- DVR, Interior Camera, and Samsara Integration
- Driver Display
Sub-System Wiring Diagrams
Side Cameras and Blind Spot Radar Connections
Rear Camera and Radar Connections
DVR, Interior Camera, and Samsara Connections
Driver Display Connections
For more information about the 10.1" Quad Monitor, see the Article - 10.1" Quad Monitor
Side Camera and Blind Spot Radar Installation Details:
Vehicle Diagram
System Parts
1. [QTY 2] - 79 GHz 2T4R Radar Sensor (with required mounting hardware)
- 150° Detection Angle 7 m forward
- 7 m rear detection length
- 0.2 m to 3.5 m detection depth
2. [QTY 1] - BSD Radar Control Box (With required mounting hardware)
3. [QTY 1] - BSD Control Box Power/Trigger Harness
- 10-32 Vdc Power Wire
- Ground Wire
- 10-32 Vdc Trigger In Wire
- LED Signal Connection
4. [QTY 2] - Monitor Transition Cable
5. [QTY 2] - Sensor Transition Cable
6. [QTY 1] – Buzzer
Functionality
2 Modes:
Low Speed Mode @ below 10 mph Detection changes to 6 m forward | 6 m back | 2 m out
The system will alert for any object in the detection zone moving and non-moving objects.
High Speed Mode @ higher than 10 mph Detection changes to 7 m forward | 7 m back | 4 m out
The system will alert for any moving object only in the detection zone.
For more information about the Radar System, see Radar System Details/Installation
Installation Component Configuration
Placement Guidelines
Camera Location - The cameras should be located towards the front of the vehicle, facing rearwards, to capture the side of the bus when a turn signal is activated.
Radar Sensor Location - The mounting height of the radar should be 1 m ± 20 cm above the ground. The location on the vehicle should be such that it is no more than 6 m from the rear bumper and no closer than 7 m from the front bumper. If the vehicle is shorter than 7 m, then placement should be about 1 m - 2 m from the rear. The radar has a ±2 m vertical detection zone and ±7 m horizontal detection zone, so ideally, keep the 7 m detection zone to the rear as much as possible behind the vehicle while covering the blind spot of the driver.
One sensor will be installed on the driver’s side and the other on the passenger’s side. Note: The sensors are programmed to be on a specific side of the vehicle; they are not interchangeable.
Control Box Location - The control box should be mounted in a central location so that both radar sensors can reach it (a female to female 5 m CAN bus data extension cable can be used). The Side View Radar Detection Buzzer (standard male to female 10 m extension cables can be used) can be routed to the front of the bus, and the two LED Signal pucks can reach the control box extension cable. Note: The system requires that the left and right turn signals of the vehicle are wired to the Side View Radar Power Harness Assembly coming from the control box.
Buzzer Location - The Side View Radar Detection Buzzer should be mounted in the front of the bus so the driver can hear it alarm when the system is activated. Note: The buzzer may be omitted as the audible alerts also come through the monitor, where the volume can be controlled.
LED Signal Puck Location - The LED Signal Pucks should be mounted on the driver and passenger A-pillar inside the bus so that they will be within the driver’s view when activated.
Monitor Location - The monitor should be mounted on the dash of the coach bus so that it allows the driver to see the screen and use it for assistance when a turn signal is activated.
System Installation Examples
Figure 1: System power is grabbed from accessory power studs;
camera cables are neatly tucked behind connectors.
Figure 2: Driver side radar installation 6 m from rear bumper,
7 m from front wheel,1 m up from ground; radar is just above grille.
Figure 3: Passenger side, side-view camera installation.
Figure 4: Passenger side radar installation 6 m from rear bumper,
7 m from front wheel, 1 m up from ground.
Figure 5: Driver side, side-view camera installation.
Figure 6: Detail view of the passenger side radar installation.
Figure 7: Detail view of the driver side radar installation.
Figure 8: Driver side radar LED signal indicator puck assembly installed on A pillar.
Figure 9: Passenger side radar LED signal indicator puck assembly installed by A pillar.
Figure 10: Monitor installation on the vehicle dashboard.
Figure 11: Monitor installation on the vehicle dashboard.
Figure 12: Monitor viewed from the driver seat.
Rear View Radar Testing and Maintenance
A walk-around test should be performed every day to verify the proper function of the system and to familiarize the operator with the zone of detection.
More frequent inspections should be performed when:
- The vehicle is operating in a particularly dirty or harsh environment.
- The operator suspects that the system has been damaged.
The walk-around test should be performed with two people. One person remains in the cab (the operator), and one person walks through the sensor detection field (the assistant).
- Clean the sensor face and rear-view camera lens of any accumulation of dirt, mud, snow, ice, or debris.
- Visually inspect the attached wiring and cabling and verify that they are properly secured and undamaged. Inspect the Radar Sensor and Control Box and verify that they are securely attached to the vehicle.
- Set the parking brake, start the vehicle, depress, and hold the vehicle brake, and place the vehicle in reverse.
- The area to the rear of the vehicle should be clear of obstacles for a distance greater than the sensor range. If the monitor shows any overlay or has any buzzer sounds, then there are objects to the rear of the vehicle that will interfere with the test. Move the vehicle to an area clear of obstacles and proceed with the test.
- The assistant should move to just behind the rear corner of the vehicle within sight of the operator's mirrors. The assistant should then walk toward the center line of the vehicle parallel to the rear, while the operator notes when the monitor shows an overlay and the buzzer sounds, signifying the sensor has detected the object.
- The assistant should continue walking through the area at the rear of the vehicle while the operator notes the area where detection occurs.
- Next, the assistant should walk from the center of the rear of the vehicle straight back, away from the vehicle. When the buzzer quits sounding or the overlay disappears, the detection limit has been reached.
- The assistant should walk the complete rear of the vehicle while the operator notes the detection edges of the entire coverage area.
- After the test, the operator and the assistant should discuss and/or note the details of the detection zone they observed to use the Rear-View Radar System correctly.
Side View Radar Testing and Maintenance
A walk-around test should be performed every day to verify the proper function of the system and to familiarize the operator with the zone of detection.
More frequent inspections should be performed when:
- The vehicle is operating in a particularly dirty or harsh environment.
- The operator suspects that the system has been damaged.
The walk-around test should be performed with two people. One person remains in the cab (the operator), and one person walks through the sensor detection field (the assistant).
- Clean the radar sensor faces and side view camera lenses of any accumulation of dirt, mud, snow, ice, or debris.
- Visually inspect the attached wiring and cabling and verify that they are properly secured and undamaged. Inspect the Radar Sensors and Control Box and verify that they are securely attached to the vehicle.
- The area to the sides of the vehicle should be clear of obstacles for a distance greater than the sensor range. If the monitor shows any overlay or has any buzzer sounds, then there are objects to the side of the vehicle that will interfere with the test. Move the vehicle to an area clear of obstacles and proceed with the test.
- Set the parking brake and start the vehicle.
- Turn on the left turn signal and verify that the driver side camera image is shown on the monitor.
- Turn on the right turn signal and verify that the passenger side camera image is shown on the monitor.
- Turn off the turn signals and verify that both camera images are shown on split-screen on the monitor.
- Turn on the hazard signal and verify that both camera images are shown split-screen on the monitor.
- Turn off the hazard signal.
- The assistant should walk down the side of the vehicle, 1 m to 2 m from the side of the bus, from the front bumper to beyond the rear bumper. Verify that on the side of the vehicle the assistant is walking that there is a red overlay on the monitor image and the LED Signal Indicator is illuminated while the assistant is in the detection zone. There should be no audible alerts during this time. Repeat the process on the opposite side of the vehicle.
- Turn on the right turn signal. The assistant should walk down the passenger side of the vehicle, 1 m to 2 m from the side of the bus, from the front bumper to beyond the rear bumper. Verify that on the side of the vehicle the assistant is walking that there is a flashing red overlay on the monitor image and that the LED Signal Indicator flashes while the assistant is in the detection zone. While the overlay flashes and the LED Signal Indicator flashes, there should be an audible alert. Adjust the monitor volume, if necessary, to hear the audible alert.
- Turn on the left turn signal. The assistant should walk down the driver’s side of the vehicle, 1 m to 2 m from the side of the bus, from the front bumper to beyond the rear bumper. Verify that on the side of the vehicle the assistant is walking that there is a flashing red overlay on the monitor image and that the LED Signal Indicator flashes while the assistant is in the detection zone. While the overlay flashes and the LED Signal Indicator flashes, there should be an audible alert. Adjust the monitor volume, if necessary, to hear the audible alert.
- After the test, the operator and the assistant should discuss and/or note the details of the detection zone they observed to use the Side View Radar System correctly.
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