公开(公告)号：US5576619A

公开(公告)日：1996-11-19

申请号：US309939

申请日：1994-09-21

申请人： Dieter Buser ,  Wolfgang Frank

发明人： Dieter Buser ,  Wolfgang Frank

IPC分类号： G01D3/028 ,  G01F23/26 ,  G01R29/00

CPC分类号： G01F23/266 ,  G01D3/028

摘要： A method is provided for the monitoring of a moving medium (1), in particular the measurement of the filling level in a container or the distance signal of an object (1) to be detected where a sensor (2) is employed. The sensor (2) is subjected at its input to a supply voltage source (Ubs) or a supply current source. In order to suppress relatively slowly changing interfering values, the output signal (Uas) of the sensor (2) is fed back in a feedback loop to the input of the sensor (2) or, respectively, to the supply voltage of the sensor (2). The feedback loop is formed such that the input supply voltage source (Ubs) of the sensor, which is changeable for adjustment of the sensitivity, changes in dependence on the output signal (Uas) of the sensor (2) such that a constant sensitivity is present at all times. In case of an occurrence of a sufficiently fast or, respectively, sufficiently jumpy change larger than 0.01 V/sec. of the output signal (Uas) of the sensor (2) relative to the quiescent output signal (Uw) in case of an absence or, respectively, in case of a presence or rest of the medium (1) in case of a spatial-geometrically moving medium (1), the feedback loop is broken up and interrupted and the interruption of the feedback loop is interpreted as a local change of the medium (1), where the local change is larger than 0.5 mm.

摘要翻译： 提供了一种用于监测移动介质（1）的方法，特别是测量容器中的填充水平或使用传感器（2）时待检测物体（1）的距离信号。 传感器（2）在其输入端经受电源电压源（Ubs）或电源电流源。 为了抑制相对缓慢变化的干扰值，将传感器（2）的输出信号（Uas）反馈回传感器（2）的输入端，或分别反馈到传感器（2）的电源电压 2）。 反馈回路形成为使得传感器的可调节灵敏度的输入电源电压源（Ubs）根据传感器（2）的输出信号（Uas）而变化，使得恒定灵敏度为 随时出席 在发生足够快的情况下，或者分别充分跳跃大于0.01V /秒的变化。 在不存在的情况下，或分别在介质（1）的存在或休息的情况下，相对于静态输出信号（Uw）的传感器（2）的输出信号（Uas） 几何运动介质（1）中，反馈环路被分解和中断，反馈环路的中断被解释为介质（1）的局部变化，其中局部变化大于0.5mm。