Endress+hauserse+co. Kg

Endress + Hauser Flowtec Ag

Endress+hauser Conducta Gmbh+co. Kg

Endress+hasuer Se+co. Kg

Universitat Basel

Raphael Kuhnen

Dietmar Frühauf

Tobias Brengartner

Izabella Sandor

Mohammad Sadegh Ebrahimi

Sergey Lopatin

Jan Schleiferböck

Thorsten Springmann

Ira Henkel

Romuald Girardey

Ralf Wacker

Wolfgang Drahm

Sergej Lopatin

Hao Zhu

Thomas Wilhelm

Anh Tuan Tham

Sascha D'Angelico

Franco Ferraro

Gerd Bechtel

Stefan Pflüger

Matthäus Speck

Volker Frey

Anne Habermehl

Peter Wimberger

Johannes Kölbl

Stefan PFLÜGER

Mohd Syafiq Affendi Ibrahim

A detection device for a magnetic sensor for detecting a magnetic field by means of a crystal body having at least one defect comprises a light source for exciting the defect; an excitation unit for producing a first excitation signal having a first specifiable frequency and a second excitation signal having a second specifiable frequency; a detector of a magnetic-field-dependent fluorescence signal of the crystal body; and an evaluation unit designed to determine the first excitation frequency and the second excitation frequency of the first and second excitation signals on the basis of the fluorescence signal such that the fluorescence signal as a function of the frequency has a minimum at the first excitation frequency and/or at the second excitation frequency Also disclosed is a magnetic sensor, a sensor device, and a method for detecting a magnetic field.

Detection unit for magnetic sensor

A method for distinguishing between the presence of a foreign body and a gas bubble in a flowable medium in a pipeline or a container includes evaluating received microwave signals, wherein mechanical vibrations are introduced into the medium by means of which a gas bubble present in the medium is set into vibration. A gas bubble is detected only in the event that when mechanical vibrations are introduced and the received microwave signals or the value derived therefrom is/are modulated; otherwise, a foreign body is detected. Also disclosed is a system which is suitable for carrying out the method according to the present disclosure.

Method for distinguishing between the presence of a foreign body or a gas bubble in a medium, and corresponding system

The present invention relates to a magnetic field sensor for detecting a magnetic field, comprising: a magnetoelectric sensor element which can mechanically oscillate, the sensor element having at least one first layer made of a magneto-restrictive material, a second layer made of a piezoelectric material, and at least one electrode made of an electrically conductive material, more particularly metal; and electronics. The magnetic field sensor, more particularly the electronics, is designed to induce mechanical oscillations of the sensor element by means of an excitation signal, to receive the mechanical oscillations of the sensor element and to convert said mechanical oscillations into a reception signal, to produce the excitation signal from the reception signal, and to determine a variable related to the magnetic field on the basis of the reception signal.

Magnetic field sensor and sensor assembly

A sensor apparatus for determining and/or monitoring a process variable of a medium in a containment includes: a crystal body including at least one defect; a magnetic field system for producing a magnetic field in the region of the crystal body and in the region of the medium within the containment, wherein the crystal body and the magnetic field system are arrangeable from the outside at a wall of the containment; a detection unit for detecting a magnetic field-dependent, fluorescent signal from the crystal body, wherein the detection unit has an excitation unit for optical exciting of the defect and a detector for detecting the fluorescent signal; and an evaluation unit for ascertaining at least one piece of information concerning the process variable based on the fluorescent signal.

Quantum sensor

A device and a method for determining and/or monitoring at least one process variable of a medium include a sensor unit having a mechanically oscillatable unit, at least a first piezoelectric element, a conductivity/capacitance detecting unit for determining and/or monitoring a conductivity and/or capacitance of the medium and an electronics unit. The device is embodied to excite the mechanically oscillatable unit by means of an excitation signal such that mechanical oscillations are executed, to receive the mechanical oscillations of the oscillatable unit, to convert them into a first received signal, to transmit a transmitted signal, and to receive a second received signal. The electronics unit is embodied, based on the first and/or second received signal, to determine the at least one process variable of the medium.

Vibronic multisensor

A device and a method for determining and/or monitoring at least one process variable of a medium include a sensor unit having a mechanically oscillatable unit, at least a first piezoelectric element, a temperature detection unit for determining and/or monitoring a temperature of the medium and an electronics unit. The device is embodied to excite the mechanically oscillatable unit by means of an excitation signal such that mechanical oscillations are executed, to receive mechanical oscillations of the oscillatable unit and convert them into a first received signal, to transmit a transmitted signal and to receive a second received signal. The electronics unit is embodied, based on the first and/or second received signal, to determine the at least one process variable and, based on a third received signal received from the temperature detection unit, to determine the temperature of the medium.

A method for monitoring the condition of a coil, wherein the coil is part of a device for determining at least one process variable of a medium in a container, includes applying an electrical excitation signal to the coil and receiving an electrical reception signal from the coil, determining a first value for the reception signal at a first predefinable measurement time, comparing the first value for the reception signal at the first measurement time with a reference value, and determining a condition indicator for the coil on the basis of the comparison. Disclosed also is a device that is designed for carrying out the disclosed method.

Monitoring the condition of a vibronic sensor

A device and a method for determining and/or monitoring at least one process variable of a medium include a sensor unit having a mechanically oscillatable unit, at least a first piezoelectric element, a pressure detection unit for determining and/or monitoring a pressure, and an electronics unit. The device is embodied to excite the mechanically oscillatable unit using an excitation signal such that mechanical oscillations are executed, to receive mechanical oscillations of the oscillatable unit, to convert them into a first received signal, to transmit a transmitted signal and to receive a second received signal. The electronics unit is embodied, based on the first and/or second received signal, to determine the at least one process variable of the medium.

Vibronic multisensor with pressure detection unit

The invention relates to a method for state monitoring of a coil that is part of a device for determining at least one process variable of a medium in a containment. The method includes supplying the coil with an electrical excitation signal and receiving an electrical, received signal from the coil, ascertaining a first frequency for the excitation signal, in the case of which a first phase shift between the excitation signal and received signal is less than a predeterminable limit value, and ascertaining a state indicator for the coil based on the first frequency. Further disclosed is a device embodied for performing a method of the invention.

Monitoring the state of a vibronic sensor

The present disclosure relates to a pH-sensor for determining and/or monitoring a pH value of a medium, having a sensor unit with a wall in contact with the medium, and at least one pH-sensitive material, which has at least one spin state that changes as a function of a pH value. The at least one pH-sensitive material is arranged in or on a region of the wall in such a way that the at least one spin state is subjected to a change in the pH value of the medium. The pH-sensor also includes a spin-sensitive unit, which is configured to detect a variable associated with the at least one spin state, wherein the spin-sensitive unit is arranged in an environment of the at least one pH-sensitive material such that the spin-sensitive unit is subjected to a change in the spin state of the at least one pH-sensitive material.

PH-sensor for determining and/or measuring a pH-value of a medium

The present invention relates to a vibronic sensor for determining a process variable of a medium in a containment, comprising a mechanically oscillatable unit, a driving/receiving unit and an electronics unit having an adaptive filter. The present invention relates also to a method for operating the sensor. The electronics unit is embodied alternately to execute a first operating mode and a second operating mode. The driving/receiving unit is embodied during the first operating mode to excite the oscillatable unit using an electrical excitation signal. During the second operating mode, the exciting of the oscillatable unit is interrupted and the oscillations of the oscillatable unit are received and transduced into an electrical, received signal. At least one filter characteristic of the adaptive filter is set such that a predeterminable phase shift is present between the excitation signal and the received signal, and the process variable is determined from the received signal.

Vibronic sensor

A method for determining and/or monitoring a process variable of a medium using a vibronic sensor includes: exciting a mechanically vibratable unit to vibrate in a first vibration mode via a drive/receiving unit using a first excitation signal; receiving and converting the vibrations of the first vibration mode into a first reception signal; generating the first excitation signal based on the first reception signal; determining the process variable from the first reception signal; exciting the vibratable unit to vibrate in a second vibration mode via the drive/receiving unit via a second excitation signal; receiving and converting the vibrations the second vibration mode into a second reception signal, where the second excitation signal is generated based on the second reception signal; and compensating for an influence of a temperature of the medium on the first reception signal using the second reception signal.

Vibronic sensor with temperature compensation

The present invention relates to a method for monitoring state of a coil having at least two connection wires, which coil is part of an apparatus for determining at least one process variable of a medium in a containment, as well as relating to an apparatus for executing the method. The method, in such case, includes method steps as follows: ascertaining a desired-value of an ohmic total resistance for the coil and the connection wires, supplying the coil with an electrical excitation signal and receiving an electrical, received signal from the coil by means of the two connection wires, ascertaining an actual-value of the ohmic total resistance based at least on the received signal, and comparing the actual-value with the desired-value and ascertaining a state indicator based on the comparison.

Monitoring the state of a coil in a sensor

The present disclosure includes an electromechanical transducer unit for a field device of automation technology including a membrane having a base area and displaceable to execute mechanical oscillations, three rods secured to the membrane perpendicular to the base area, a housing, wherein the rods extend into the housing, three magnets, each secured to one of the rods opposite the membrane, and a coil having a core and secured within the housing adjacent the magnets, the coil embodied to produce a magnetic field that causes the rods to execute mechanical oscillations. The rods are secured to the membrane such that oscillations of the membrane result from the oscillations of the rods. At least one of the rods is secured to the base area where the second derivative of the deflection of the membrane from a rest position as a function of the site on the base area is essentially zero.

Electromagnetic driving/receiving unit for a field device of automation technology

A vibration sensor comprising an oscillatable unit, which is composed of a membrane with an inner surface and an outer surface and, in given cases, at least one oscillatory element secured on the outer surface of the membrane. A transmitting/receiving unit is provided, which with a predetermined exciter frequency excites the oscillatable unit to execute oscillations and which receives oscillations of the oscillatable unit. A control/evaluation unit is provided, which signals reaching of the predetermined fill level or ascertains the density, respectively the viscosity, of the medium. In order to be able to apply the vibration sensor in high temperature applications, a disc shaped element of a magnetostrictive material is provided, which has a force transmitting connection with the inner surface of the membrane. The transmitting/receiving unit is an electromagnetic drive.

Growing community of inventors

Schliengen, Germany

Raphael Kuhnen