Eddy current probe

专利名称：Eddy current probe

发明人：EGNER, HARALD,RUS, ROBERT,ANTHONIO,

PAUL

申请号：EP109240.5申请日：190523公开号：EP0343590A3公开日：19900725

摘要：The magnetic field of one me spule wirbelstromsensor is described, this is theobject being collected into and setting, and the coil of a sinusgenerator referenzspule,the output signal of its output signal is subtracted by a substrahierers, directly passthrough the circuit design of a 90-degree phase shifter in the first and second

demodulators of the output signal of demodulator, wherein having controllable phasedelay by the output signal of a phase shifter to the demodulator of PM signal PMadditional as one is so to select to the phase angle of sinusgenerators, it is in complicatedinterference impedanzebene in certain direction. The characteristics of sensor is theoutput signal of the first demodulators of erfindungsgem e, it by a controllable gainamplifier (b) is benevolence in a wide subtrahierer that this, which is by the output signal(a) of a controllable gain amplifier and the second demodulator, and as measurement,the object is recorded activation threshold value of output signal (such as utrig).

申请人：FRAUNHOFER-GESELLSCHAFT ZUR FORDERUNG DER ANGEWANDTENFORSCHUNG E.V.

地址：Leonrodstrasse 80636 München DE

国籍：DE

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