| 摘要 |
A circuit arrangement having a master microcontroller operably connected to a sensor for detecting a parameter. A power communications line is connected between the power source, master microcontroller, and sensor, wherein the power communications line carries power to the sensor as well as communication signals between the sensor and the master microcontroller. An embodiment of an automotive ultrasonic sensor system for object detection is disclosed, where the master microcontroller is connected to a number of external ultrasonic sensors via the circuit arrangement. The circuit arrangement is also advantageous in enabling a separate wire harnesses to be configured for the external ultrasonic sensors that operates at logic power levels (e.g., 5V) rather than the vehicular accessory drive voltage (typically 12V) present in the vehicular wire harness that interfaces the master microcontroller with other controllers in the vehicle.
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