Sensor Interval Distance Dividing Alarm Output Specification

The condition logic is as below according to phase logic in priority. (In same sensor)

Fig 1: Condition Logic & Phase Logic Reference Chart

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RPAS operation ranges according to distance are as below.

1. First alarm (81 cm ~ 120 cm)
   Fig 2: Timing Pattern Graph - First Alarm (81 cm ~ 120 cm)

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2. Secondary alarm (41 cm ~ 80 cm)
   Fig 3: Timing Pattern Graph - Secondary Alarm (41 cm ~ 80 cm)

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3. Third alarm (40 cm or less)
   Fig 4: Timing Pattern Graph - Third Alarm (40 cm Or Less)

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4. Failure alarm cycle

   When the system starts and sensor has errors, the warning sound as the sensor position is like following.

   Fig 5: Timing Pattern Graph - Failure Alarm Cycle

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   * In the case that the multiple sensors have errors, the sequence of sensor's warning is like followings.

   RL → RCL → RCR → RR

   Fig 6: Timing Pattern Graph (Multiple Errors)

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   * After the warning sound for diagnosis is generated, the other normal sensors execute the normal function such as the detection and the transmission of distance data.

   NOTE:

   1. Time tolerance of the above waveform : Time ± 10%
   2. At nearer distance than 30 cm, detection may not occur.
   3. Alarm will be generated with vehicle reversing speed 10 km/h or less.
   4. For moving target, maximum operation speed shall be target approach speed of 10 km/h.
   5. When the vehicle or the target is moving, sequential alarm generation or effective alarm may be failed.
   6. False alarm, or failure of the alarm to trigger 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 to the sensor.
      • Dirt on the sensor.
      • Sequential alarm may not occur due to the reversing speed or the target shape.