公开(公告)号：US3723862A

公开(公告)日：1973-03-27

申请号：US3723862D

申请日：1971-04-05

Applicant: SIEMENS AG

Inventor： WENTZEL P ,  SCHULZE E

IPC: C07D201/04 ,  H03K17/14 ,  H03K17/95 ,  G01R33/00

CPC classification number: H03K17/9547 ,  C07D201/04 ,  H03K17/14

Abstract: A detector for detecting objects as they move through a magnetic field established between a transmitter coil connected to an electrical supply and a receiver coil spaced from and magnetically coupled to the transmitter coil. The receiver coil, together with a capacitor, form the oscillatory circuit of an amplifier to provide an oscillator which oscillates to provide a high amplitude output signal in response to alteration of the magnetic field due to an object passing therethrough. The oscillator is provided with three feedback networks including one feedback network which functions as a source of alternating current which causes the oscillator to provide the low amplitude output signal. The oscillatory circuit includes a resistor for providing a highly damped operation which supports the effect of the first mentioned feedback circuit. A second feedback circuit provides constant amplification and a third feedback circuit includes the transmitter and receiver coils for effecting the regenerative function for oscillation.

Abstract translation: 一种检测器，用于当物体移动通过建立在连接到电源的发射器​​线圈与与发射器线圈间隔开并且磁耦合到发射器线圈的接收器线圈之间的磁场时进行检测。 接收器线圈与电容器一起形成放大器的振荡电路，以提供振荡器，振荡器响应由于物体通过的磁场的变化而提供高幅度输出信号。 振荡器具有三个反馈网络，其中包括一个反馈网络，其作为交流电源，其使振荡器提供低振幅输出信号。 振荡电路包括用于提供高阻尼操作的电阻器，其支持第一提及的反馈电路的效果。 第二反馈电路提供恒定的放大，并且第三反馈电路包括用于实现振荡的再生功能的发射器和接收器线圈。