Sensor signals

Every sensor emits an ultrasound beam with the following geometric specification.

• horizontal beam width = 120°
• vertical beam width = 60°

The control module measures the distance between the sensor and the obstacle at cyclical intervals. The measurement is based on the echo depth sounding principle.

The sensors are activated in regular intervals for a short period of time and emit ultrasound waves. Then the sensors are switched to reception and collect the reflected soundwaves. The control module then calculates the distance between the sensor and the obstacle from the running time of the soundwaves.

Fig 1: Identifying Ultrasound Beam Geometric Specification (1 Of 2)

Courtesy of PORSCHE OF NORTH AMERICA, INC.

Fig 2: Identifying Ultrasound Beam Geometric Specification (2 Of 2)

Courtesy of PORSCHE OF NORTH AMERICA, INC.