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    • 11. 发明授权
    • Proximity switch and circuit system
    • 接近开关和电路系统
    • US4107555A
    • 1978-08-15
    • US771806
    • 1977-02-24
    • Lothar HaasRolf BrautigamAlbert Weckenmann
    • Lothar HaasRolf BrautigamAlbert Weckenmann
    • H03K17/955H03K17/00G01R27/26
    • H03K17/955Y10T307/766
    • Two surface electrodes are applied to an insulating substrate. The surface electrodes are totally surrounded by a metallic shield which is electrically floating, one of the electrodes being an emitter electrode emitting ac radiation and the other a receiving electrode. A portion of the emitted field is conducted by the shield. Upon approach, or touching of the shield by a grounded body, for example by the hand of a user, the field distribution within the shield will change and the radiation received by the receiving electrode will likewise change. In accordance with the present invention, an integrated circuit (IC) evaluation circuit is located beneath the metallic shield on the insulating substrate, the surface electrodes as well as external terminals passing through the insulated substrate being connected to the IC. Preferably, the shield is a plastic cap which is metallized, formed with snap tongs to snap over the insulated substrate.
    • 将两个表面电极施加到绝缘基板。 表面电极被电浮动的金属屏蔽体完全包围,其中一个电极是发射交流辐射的发射电极,另一个是接收电极。 发射场的一部分由屏蔽件传导。 在通过接地的身体接近或接触屏蔽时,例如通过使用者的手,屏蔽内的场分布将改变,接收电极接收的辐射也将同样改变。 根据本发明,集成电路(IC)评估电路位于绝缘基板上的金属屏蔽下方,表面电极以及通过绝缘基板的外部端子连接到IC。 优选地,屏蔽件是金属化的塑料盖,其形成有卡钳以卡扣绝缘基板。
    • 12. 发明授权
    • Capacitative proximity sensing system
    • 电容接近感应系统
    • US4016490A
    • 1977-04-05
    • US637181
    • 1975-12-03
    • Albert WeckenmannLothar HaasRolf Brautigam
    • Albert WeckenmannLothar HaasRolf Brautigam
    • H03K17/955H03K17/96G01R27/26
    • H03K17/962H03K17/955H03K2217/960765H03K2217/960775
    • A leakage field capacitor has two adjacently located surface electrodes placed on an essentially plane support surface. A signal source is connected to one of the electrodes, so that this electrode, which may then be termed the transmitting electrode, will provide an electrical field which is sensed by the other, receiving electrode, which is connected to an evaluation circuit which evaluates disturbance of the field generated by the transmitting electrode. A metallic shield which is electrically floating i.e., is galvanically isolated with respect to the electrodes is connected to the signal source as well as to the evaluation circuit in such a manner as to draw off a portion of the field generated by the transmitting electrode when a mass connected to a terminal of the electrodes -- for example ground of chassis -- approaches the shield to cause an increase in leakage field being drawn off by the shield and thereby provide a positive signal indication; the grounded mass may, for example, be the finger of a user operating a switch.
    • 泄漏场电容器具有放置在基本上平面的支撑表面上的两个相邻定位的表面电极。 信号源连接到一个电极,使得该电极(其可以被称为发射电极)将提供由另一个接收电极感测的电场,该电场连接到评估电路,其评估干扰 由发射电极产生的场。 电浮动的金属屏蔽体,即相对于电极电流隔离,连接到信号源以及评估电路,以便当发出电极产生的场的一部分时, 连接到电极的端子(例如机架的接地)的质量接近屏蔽件以导致由屏蔽件吸走的泄漏场的增加,从而提供正信号指示; 接地质量例如可以是操作开关的用户的手指。