| 摘要 |
An active sensor having a transmitter for emitting a measurement signal, having a receiver for receiving the measurement signal, having a transmission link for transmitting the measurement signal, and having an evaluation unit which is configured to register a change in the transmission characteristic of the measurement signal and to generate an output signal, which corresponds to the registered change, the transmitter being configured to emit the measurement signal discontinuously, the transmission power being briefly above a maximum transmission power that is possible during continuous operation and being on average below the maximum transmission power
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