Audible Warning Device: Description and Operation

BACK WARNING SYSTEM

DESCRIPTION
The Back Warning System is active in 'R' range. This system uses ultrasonic sensors to detect objects behind the vehicle; the driver is alerted using 3 - stage audible warning.




ALARM RANGE
First alarm : Object comes near to the sensor located at the rear of vehicle, within 81 - 120 cm ± 15 cm
Second alarm : Object comes near to the sensor located at the rear of vehicle, within 41 - 80 cm ± 10 cm
Third alarm : Object comes near to the sensor located at the rear of vehicle, within 40 cm ± 10 cm

NOTE:
1. Time tolerance of the above waveform : Time ± 10%
2. At nearer distance than 40 cm, detection may not occur.
3. Alarm will be generated with vehicle reversing speed 10 km/h or less.
For moving target, maximum operation speed shall be target approach speed of 10 km/h.

4. When the vehicle or the target is moving, sequential alarm generation or effective alarm may be fail.
5. False alarm may occur in the following conditions.
- Irregular road surface, gravel road, reversing toward grass.
- Horn, motor cycle engine noise, large vehicle air brake, or other object generating ultrasonic wave is near.
- When a wireless transmitter is used near the sensor.
- Dirt on the sensor.
- Sequential alarm may not occur due to the reversing speed or the target shape.