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    • 19. 发明公开
    • ELEKTRONISCHE SCHALTUNG FÜR EINEN WEIGHT-IN-MOTION SENSOR
    • ELEKTRONISCHE SCHALTUNGFÜREINEN重量在运动传感器
    • EP2831554A1
    • 2015-02-04
    • EP13713073.8
    • 2013-03-26
    • Kistler Holding AG
    • AMSTUTZ, LeoSTREBEL TSCHANNEN, RomanCAVALLONI, ClaudioHOFMANN, AdrianCORNU, David
    • G01G3/13G01G19/02G01L1/16
    • G05F5/00G01D3/036G01D18/004G01G3/13G01G19/024G01L1/16H03F3/347H03F3/70
    • The invention relates to an electronic circuit for converting a charge signal of a WIM (Weigh-in-Motion) sensor 3, that is installed in a roadway 6 and has a charge signal output and a ground output, into a voltage signal. The circuit comprises a charge amplifier having an IC1 that has a first and a second input as inputs of the sensor 3. The circuit also comprises an integrated impedance converter (IEPE) at the output to a two-core cable 5 having a voltage signal output "OUT" and a ground output "GND". According to the invention, a capacitor (Cc) is connected in series to the charge signal output "In" of the sensor 3 at the first input of the IC1 of the charge amplifier for decoupling the internal DC voltage of the circuit via the sensor 3. Furthermore, a Zener diode D is arranged between the ground output "GND" of the sensor 3 and the second input of the IC1, which diode can be fed through a resistor R1, together with a current source 8 arranged at the output side, via the two-core cable 5 in order to adjust the potential at the second input of the IC1. In particular, the ground output of the sensor is at the same potential as the ground output of the two-core cable 5.
    • 本发明涉及一种用于将安装在道路6中并且具有充电信号输出和接地输出的WIM(动态称重)传感器3的充电信号转换为电压信号的电子电路。 该电路包括具有IC1的电荷放大器,该IC1具有作为传感器3的输入的第一和第二输入。该电路还包括位于具有电压信号输出的双芯电缆5的输出处的集成阻抗转换器(IEPE) “OUT”和接地输出“GND”。 根据本发明,电容器(Cc)串联连接到电荷放大器的IC1的第一输入端处的传感器3的充电信号输出“In”,用于经由传感器3去耦电路的内部DC电压 此外,在传感器3的接地输出“GND”与IC1的第二输入端之间,齐纳二极管D与布置在输出侧的电流源8一起设置,该二极管可以通过电阻器R1馈送, 经由两芯电缆5以调整IC1的第二输入端的电位。 特别地,传感器的接地输出与双芯电缆5的接地输出处于相同的电位。
    • 20. 发明公开
    • SENSOREINHEIT
    • 传感器单元
    • EP1904822A1
    • 2008-04-02
    • EP06741679.2
    • 2006-07-04
    • Kistler Holding AG
    • VON BERG, JochenSONDEREGGER, ChristofCAVALLONI, ClaudioTANNER, RenéGNIELKA, Marco
    • G01L9/00G01L19/04
    • G01L23/18G01L19/0636
    • The invention relates to a sensor unit (1) for measuring a measurable variable, especially in an aggressive medium (2). Said sensor unit (1) comprises a sensor (4) which is disposed in a sensor casing (3) and is provided with a sensor zone (6) located on a base (5). In order to detect the measurable variable in the sensor zone (6), a measuring hole (7) which allows the medium (2) to advance directly to the sensor zone (6) is provided in the sensor casing (3). A side of the sensor zone (6) that faces away from the measuring hole (7) is equipped with a measuring surface (9) which encompasses measuring electronics (8). An electrical feeder (10) is provided on the sensor (4) in order to transmit a sensor signal generated by the measuring electronics (8). The sensor (4) is sealingly arranged on a sealing surface (11) located on the sensor casing (3) in such a way that the measuring surface (9) is isolated from the medium (2). According to the invention, a disconnecting means (12) is provided by means of which the sensor (4) can be disconnected from thermally and/or mechanically induced changes in the sensor casing (3). The invention further relates to a probe comprising a sensor unit (1), as well as an internal combustion engine, a hydraulic or pneumatic tool, and an air conditioner encompassing an inventive sensor unit (1).