Reflection microwave barrier
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United States of America Patent
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Jul 7, 2020
Grant Date -
Dec 14, 2017
app pub date -
Jun 14, 2017
filing date -
Jun 14, 2016
priority date (Note) -
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Abstract
A reflection microwave barrier for monitoring a limit level in at least one working area by outputting a switching signal. The reflection microwave barrier including a microwave transmitter for continuously emitting a time modulated microwave signal, a microwave receiver arranged on the same side of the at least one working area as the microwave transmitter to receive a reflection of the microwave signal, and a control circuitry communicating with the microwave receiver for a detection and monitoring of echo signals in the received reflection of the microwave signal. The control circuitry calculates the runtime of an echo signal), when the amplitude of the echo signal rises or increases. Furthermore, the control circuitry determines by the calculated runtime, whether an origin of the echo signal lies within the at least one working area, and only outputs the switching signal in this case.
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