Motion detector
OwnerDietmar Janusinventor
Life of this patent
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Abstract
The invention relates to a motion detector or proximity switch for detecting moving objects, wherein a high frequency electromagnetic radiation is generated by a free running oscillator and transmitted via a transmitter antenna. The transmitter antenna detects the Doppler modified radiation reflected by the moving object as a function of its phase position or amplitude variation. The radiation is compared with the transmitted radiation parameters in an evaluation device with a view to producing an output signal. The inventive detector is characterized in that it included a free running oscillator having a feedback guaranteed by at least one transmitter antenna ANT RX and at least one receiver antenna ANT TX which are oriented towards the object and coupled via a side or leakage radiation.
Claims6
A motion detector or proximity switch for detecting moving objects, a high-frequency electromagnetic being produced via a freely oscillating oscillator and being emitted via a transmitting antenna, and the radiation reflected from the moving object and modified due to the Doppler effect being detected with regard to change in its phase angle or amplitude via a receiving antenna and being compared in an evaluation device with the parameters of the emitted radiation for the production of an output signal, wherein it comprises a freely oscillating oscillator that comprises at least one transmitting antenna ANT RX and at least one receiving antenna ANT TX, which are orientated in the direction of the object and are positioned relative to one another to cause a part of the radiation emitted by the transmitting antenna to be radiated directly into the receiving antenna in order to produce electrical oscillations.
Dependencies are inferred from the claim text.