Endress + Hauser Gmbh + Co. Kg

Festo Se &Co. Kg

Endress+hauser Gmbh+co.

Holger Steltner

Dietmar Spanke

Edgar Schmitt

Alexey Malinovskiy

Manfred Eckert

Stefan Maier

Jan Reich

Matthias Joachimsthaler

Reinhard Schaefer

Fabrice Peter

Bernhard Ottenbreit

Patrick Laux

Bastian Fassbender

Uwe Leonhardt

Jürgen Ruoff

A process valve apparatus includes a process fitting, a pneumatic valve drive and a control device with a control unit. The control device is configured to carry out a partial stroke test. The control unit is configured to control a valve device of the control device with an electrical control signal in order to effect a pneumatic actuation of the valve drive. The control device is configured to perform a plurality of partial stroke tests and the control unit is configured to provide the electrical control signal with the same control signal values for each partial stroke test.

Process valve apparatus and method

A diagnostic device () for a valve drive () having a drive element () for driving a valve member () of a process valve (). The diagnostic device () is configured to perform a play detection procedure to detect play between the drive element () and the valve member () and to provide play information in accordance with the detected play.

Diagnostic device, system and method

A diagnostic device for diagnosing leakage of pressurized fluid from at least one pressure chamber to which a pressurized fluid can be applied. The diagnostic device is configured to diagnose the pressurized fluid leakage on the basis of at least one pressure control actuating signal for controlling a valve arrangement provided for closed-loop pressure control of the pressure chamber.

Diagnostic device, control device, fluid system and method for diagnosing leakage of pressurized fluid

A diagnostic apparatus for a fluidic actuator, in particular a fluidic valve drive, which has an actuator element displaceable into different positions (x, x, xp, xp), wherein the diagnostic apparatus is configured to provide a first break-away pressure measured value (pi) for a first position of the actuator element. The diagnostic apparatus is further configured to determine, based on the first break-away pressure measured value (pi) and break-away pressure reference information (pri) stored in the diagnostic apparatus, a first break-away pressure prediction value (pp) for a first prediction position (xp) of the actuator element, the first prediction position being different from the first position (x).

Diagnostic apparatus, system and method

An improved and more accurate method for evaluating and correcting total measurement signals (TS(n)) of measuring devices. The invention concerns a method for evaluating and correcting total measurement signals (TS(n)) of a measuring device, wherein measuring signals are transmitted in the direction of a medium and reflected on a surface of the medium as wanted echo signals or on a surface of a disturbing element as interference signals and received. In the case of a modification of at least one technical, process condition in the container and/or a modification of at least one technical, measurement condition of the measuring device, an independent reference curve is ascertained on the basis of a current static reference curve, wherein the interference signals are masked out of the raw echo curve on the basis of a masking algorithm, which applies the independent reference curve.

Method for evaluating and correcting total measurement signals

A method for measuring a fill level of a fill substance in a container and for monitoring at least one predetermined fill level (L, L), using a fill level measuring device working according to the travel-time principle, as well as a corresponding fill level measuring device, wherein the monitoring satisfies high safety standards, wherein, in each measuring cycle, transmission signals (S) are sent toward the fill substance and their echo signals (E) are received, the fill level is determined, based on the echo signals (E), in a first evaluation method, and it is determined, based on the echo signals (E), in a second evaluation method independent of the first evaluation method, whether the fill level exceeds or falls beneath the predetermined fill levels (L, L).

Filling level measurement device and filling level measurement and monitoring method

A measuring instrument is provided, to which various ultrasonic sensors can be connected in a simple way. The measuring instrument has an electronic measuring instrument unit, to which various ultrasonic sensors can be connected, and having an apparatus for detecting the ultrasonic sensor that is connected, which apparatus, for detecting the ultrasonic sensor, causes the ultrasonic sensor to oscillate, picks up its oscillation behavior, and from that derives a sensor-specific variable.

Measuring instrument

A method for a fill level measurement in accordance with the running time principle, which functions dependably over a long period of time, is provided, having a fill level measuring device with an ultrasonic sensor for transmitting and receiving ultrasound, wherein a repeated check of a resonance frequency of the ultrasonic sensor is performed, in the course of which the ultrasonic sensor is briefly excited to oscillate, following the excitation a signal received by the ultrasonic sensor is picked up, and the actual resonance frequency of the ultrasonic sensor is determined by means of the received signal in that the received signal is digitized and supplied to a digital signal processor, a Fourier transformation of the digitized received signal is performed in the signal processor, a maximum of the Fourier-transformed received signal is determined as a function of the frequency, a frequency at which the maximum occurs is stored as the actual resonance frequency, and during measuring operations the ultrasonic sensor is excited by the digital signal processor by means of the last determined actual resonance frequency.

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Esslingen, Germany

Holger Steltner