Abstract: The invention relates to a mass flow meter for flowing media, which operates according to the Coriolis principle. At least one oscillator and at lest one sensor that detects Coriolis forces and/or oscillations based on Coriolis forces are mounted on a Coriolis measuring tube. As evaluation unit determines a measured flow valve from the measurement signal of the sensor. Means are provided which make it possible to detect zero flow in the measuring tube regardless of the detection of Coriolis forces and/or oscillations based on Coriolis forces and generate a corresponding measurement signal.

Abstract: The pressure transducer provided with a measuring chamber is separated by a medium which is to be measured by a separation membrane. A piezoelectric element is arranged on the measuring chamber which is filled with silicone oil, thereby enabling the specific volume of said chamber to be modified. An adjustable path of the measuring signal is compared to a reference path and considerable deviations indicate an error on the membrane. As a result, the state of the separation membrane can be monitored when the pressure transducer is in the installed state.

Abstract: The invention relates to a mass flow meter for flowing media, which operates according to the Coriolis principle. At least one oscillator and at lest one sensor that detects Coriolis forces and/or oscillations based on Coriolis forces are mounted on a Coriolis measuring tube. As evaluation unit determines a measured flow valve from the measurement signal of the sensor. Means are provided which make it possible to detect zero flow in the measuring tube regardless of the detection of Coriolis forces and/or oscillations based on Coriolis forces and generate a corresponding measurement signal.

Abstract: A diagnostic system for a valve (2) that can be actuated by a position controller via a drive. The diagnostic system includes a device (14) provided for recording, storing, and evaluating, body sound spectra on the valve. In order to enable a valve to be diagnosed in a particularly reliable manner, a body sound spectrum which is recorded when the intact valve (2) is slightly open is stored in the device (14) provided for recording, storing, and evaluating, whereby the valve can be closed for diagnostic purposes and the resemblance of the recorded body sound spectrum to the stored body sound spectrum is used as a criterion for evaluating a non-sealing condition of the valve.

Abstract: A diagnostic system for a valve (2) that can be actuated by a position controller via a drive. The diagnostic system includes a device (14) provided for recording, storing, and evaluating, body sound spectra on the valve. In order to enable a valve to be diagnosed in a particularly reliable manner, a body sound spectrum which is recorded when the intact valve (2) is slightly open is stored in the device (14) provided for recording, storing, and evaluating, whereby the valve can be closed for diagnostic purposes and the resemblance of the recorded body sound spectrum to the stored body sound spectrum is used as a criterion for evaluating a non-sealing condition of the valve.

Abstract: Method and apparatus by which skidding wheels of a vehicle are quickly recognized and distinguished from drive train vibrations. The method uses the difference between values of a comparison parameter (e.g. wheel circumferential distance) of a driven wheel and a similar comparison parameter of a non-driven wheel. The differences are summed over time intervals as soon as a kinetic parameter (e.g. slippage of the driven wheel) exceeds a threshold value. When the sum of the difference values exceeds a maximum value, a control signal is generated that can be used, for example, as an alarm signal for the driver, or as a control signal for changing the drive moment of the wheel, for changing gears, or for driving additional wheels.

Abstract: An output stage having a load is connected to a voltage source via a source-drain path of a field effect transistor. Between drain and gate terminals of the field effect transistor a specifically designed voltage doubling circuit is provided. This has the effect that only one control voltage and one switch (control transistor T1) is required for driving the field effect transistor.