Sensor signals
WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2005 Porsche 911, 2004 Porsche 911, 2003 Porsche 911, 2002 Porsche 911, and 2001 Porsche 911. However, it is still accessible from the selected car via links, so may be relevant.
Every sensor emits an ultrasound beam with the following geometric specification.
- Horizontal beam angle = 120°
- Vertical beam angle = 60°
The control module measures the distance between the sensor and any obstacle in cyclical intervals. Measurement is based on echo-sounding techniques.
The sensors are actuated briefly at regular intervals and transmit ultrasonic waves. Next, the sensors are switched to receive mode, and receive the reflecting soundwaves. The control module then calculates the distance between the sensor and the obstacle from the running time of the soundwaves.