- 2 -
How the System Works
The Backup Parking Sensor System determines obstacle distance by measuring the time
needed for the ultrasonic wave emitted by a sensor to reach an obstacle and for the sensor to
receive the ultrasonic wave reflected from the obstacle. Given the speed of the ultrasonic wave,
the system can then calculate and display the distance between the sensor and the obstacle.
To have the look of factory installed system, the system comes with 4 in-bumper type sensors to
be installed in the rear bumper by drilling holes through the bumper.
The main control box is
powered by tapping into the back up light wires so that the system will work only when vehicle is
put in reverse.
It is supplied with a wireless LED digital display which shows the exact
distance from an obstacle and eliminates the wiring between the display and main control box.
The wireless display can be mounted up to 20m (66 feet) away from the main control box (still
requires its own +12V power supply). This is especially convenient for installation on long
vehicles.
The wireless display can be powered by cigarette lighter, ACC or ignition switch.
Seven (7) LED Lights (3xGreen/2xYellow/2xRed) on each side of the wireless display indicate
both orientation of obstacle and Safe/Warning/Stop zone.
The audible alert (beeper) with
on/off switch is built in the wireless display. It beeps faster as vehicle gets closer to obstacle and
sounds continuously when vehicle is within 0.3m (1ft) from obstacle.
http://parkingsensors.net
HY Technologies
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Milpitas
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California
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USA All Rights Reserved
Fig. 3
Control Box, Wireless LED Display, and Wiring
Fig.1
Mounting Height and Position of Sensors
H = 50 ~ 80cm (20” ~ 32”)
L1 = 6 ~ 15cm (2” ~ 6”)
L2 = L3 = L4 or L2 = L4 = 0.3L, L3 = 0.4L
Ground
50 ~ 80cm (20” ~ 32”)
Sensor Center Line
Parallel to Ground
Sensor
Sensor Mounting Height
Fig.2
Mounting Height and Angle of Sensor
L2
H
L1
L3
L4
L1
Ground
L
D
C
B
A
Sensors
D
C
B
A
Back Up Light
Red (+) 12V
Black ( - )
or Chassis Ground
Control Box
To Cigarette Lighter
(+12V)
A
B
C
D
PWR
Beeper On/Off Switch on Back of Display
R
L
8.8
Wireless LED Display
Power Plug
Power Plug
Sensor Plugs
