Method for identifying a system state of a technical system with a sensor device having a passive component, as well as a sensor device and use of a sensor device

摘要

A method, as well as an associated sensor device and use of such method, for identifying a system state of a technical system (7) by a sensor device with an antenna element (1; 10) for receiving and transmitting radio signals (13; 14) to detect and communicate the system state. The transmission behavior of the antenna element is determined by controlling at least one load impedance (8) of the antenna element. The load impedance of the antenna element is controlled by a physical signal (6).