Interface circuit between a sensor, particularly a thick film pressure sensor, and an electrodynamic instrument, and a sensor incorporating such a circuit
    1.
    发明公开
    Interface circuit between a sensor, particularly a thick film pressure sensor, and an electrodynamic instrument, and a sensor incorporating such a circuit 失效
    的换能器,特别是一种厚膜电阻器的压力换能器,并且配备有这种电路转换器的电动工具之间的互连。

    公开(公告)号:EP0216288A1

    公开(公告)日:1987-04-01

    申请号:EP86112733.0

    申请日:1986-09-15

    IPC分类号: G01L9/04

    CPC分类号: G01L9/04

    摘要: An electrical sensor device, particularly a pressure sensor device, comprises at least one pressure transducer, (11 to 14), particularly a thick-film transducer, connected to a monitoring circuit (10) arranged to output an electrical signal (V) which is variable in dependence on the pressure (p), an interface circuit (15 to 17) connected to the monitoring circuit (10) and arranged, in response to the said signal (V), to present an output resistance which increases or decreases in accordance with a predetermined response curve, on increase in the pressure (p) detected by the transducers.

    Circuit for detecting and signalling failure and irregular operation of a charging device for batteries
    4.
    发明公开
    Circuit for detecting and signalling failure and irregular operation of a charging device for batteries 失效
    电路,用于检测和报告错误和Betriebsunregelmässigkeiten电池充电设备。

    公开(公告)号:EP0053103A1

    公开(公告)日:1982-06-02

    申请号:EP81830211.9

    申请日:1981-10-28

    IPC分类号: H02J7/14 H02J7/24

    摘要: In a system (1) for recharging electric accumulators (2), including a polyphase alternator (3) connected to a rectifier circuit (7), and a voltage regulator circuit (6) connected to the rectifier circuit (7) and the field winding (4) of the alternator (3), there is connected a circuit (9) for detecting and indicating faults and operating anomalies. This circuit (9) includes a signal processor circuit (10) which is connected to the armature winding (5) of the alternator (3) and is operable to provide an output test signal substantially proportional to the mean value of the signal appearing, in operation, at the actual or virtual star point of the phases of the armature winding (5) of the alternator (3). Generator means (11) provide first and second predetermined reference output signals. A comparison circuit (12) activates 3 1arm signalling means (13) when the test signal falls below the first reference signal, and when the test signal exceeds the second reference signal.