Soul L4-2.0L (2010)
Parking Assist Distance Sensor: Description and Operation
Operation Principle
The sensor emits ultrasonic wave to the objects, and it measures the time until reflected wave returns, and calculates the distance to the object.
Distance Detection Type
Direct detection type and indirect detection type are used together for improving effectiveness of the detection.
1. Direct detection type: One sensor transmits and receives signals to measure the distance.
2. Indirect detection type: One sensor transmits signals and the other sensor receives the signals to measure the distance.
Measurement Principle
Rear parking assist system is a complementary device for reversing. Rear parking assist system detects objects behind vehicle and provides the driver
with buzzer alarm finding objects in a certain area, using ultrasonic wave propagation speed and time.
The propagation speed formula of ultrasonic wave in air is following :
v=331.5 + 0.6t (m/s)
v=ultrasonic wave propagation speed
t=ambient temperature
The basic principle of distance measurement using ultrasonic wave is :
Sensor Detection Range
