Sensor unit, sensing and evaluation device with such a sensor unit and motor vehicle or trailer with it and method for protecting an evaluation

摘要

The invention relates to a sensor unit (2) for installation in a motor vehicle or trailer, wherein the sensor unit has a sensor measuring structure (16) for sensing at least one physical variable, a sensor housing (12) partially or completely surrounded sensor housing (12) and at least two connecting lines (12). 18). The sensor unit (2) is galvanically connected to the sensor housing (12) with a conductive part of the motor vehicle or trailer, and the sensor measurement structure (16) can be connected to an evaluation device (6) via the connecting lines (18). For discharging existing electrostatic charge from the conductive part of the motor vehicle or trailer, the sensor unit (2) has a predetermined discharge path (4) between the electrically conductive sensor housing (12) and a connection line (18) or between the sensor housing (12) and the sensor measurement structure ( 16), so that the electrostatic charge is dissipated via the evaluation unit (6) connected to the sensor unit (2). Furthermore, the invention relates to a sensing and evaluation device with a sensor unit (2) and an evaluation device (6) and a motor vehicle or trailer with at least one sensor unit (2) and / or at least one sensing and evaluation device according to the invention, and a method for Protecting the evaluation device (6).