EP3987251A1 - Sensor device and fluid flow-rate measuring assembly having a sensor device of this type - Google Patents

Sensor device and fluid flow-rate measuring assembly having a sensor device of this type

Info

Publication number
EP3987251A1
EP3987251A1 EP20733727.0A EP20733727A EP3987251A1 EP 3987251 A1 EP3987251 A1 EP 3987251A1 EP 20733727 A EP20733727 A EP 20733727A EP 3987251 A1 EP3987251 A1 EP 3987251A1
Authority
EP
European Patent Office
Prior art keywords
energy
sensor device
sensor
evaluation unit
data interface
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP20733727.0A
Other languages
German (de)
French (fr)
Inventor
Michael Löken
Matthias LANSING
Florian Hallermann
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fraba BV
Original Assignee
Fraba BV
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fraba BV filed Critical Fraba BV
Publication of EP3987251A1 publication Critical patent/EP3987251A1/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D21/00—Measuring or testing not otherwise provided for
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F15/00—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
    • G01F15/06—Indicating or recording devices
    • G01F15/061—Indicating or recording devices for remote indication
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
    • G01F1/05—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects
    • G01F1/06—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects using rotating vanes with tangential admission
    • G01F1/075—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects using rotating vanes with tangential admission with magnetic or electromagnetic coupling to the indicating device
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
    • G01F1/05—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects
    • G01F1/06—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects using rotating vanes with tangential admission
    • G01F1/08—Adjusting, correcting or compensating means therefor
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F15/00—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
    • G01F15/02—Compensating or correcting for variations in pressure, density or temperature
    • G01F15/022—Compensating or correcting for variations in pressure, density or temperature using electrical means
    • G01F15/024—Compensating or correcting for variations in pressure, density or temperature using electrical means involving digital counting
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F15/00—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
    • G01F15/06—Indicating or recording devices
    • G01F15/065—Indicating or recording devices with transmission devices, e.g. mechanical
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F15/00—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
    • G01F15/06—Indicating or recording devices
    • G01F15/065—Indicating or recording devices with transmission devices, e.g. mechanical
    • G01F15/066—Indicating or recording devices with transmission devices, e.g. mechanical involving magnetic transmission devices
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
    • G01P3/42—Devices characterised by the use of electric or magnetic means
    • G01P3/44—Devices characterised by the use of electric or magnetic means for measuring angular speed
    • G01P3/48—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage
    • G01P3/481—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage of pulse signals
    • G01P3/4815—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage of pulse signals using a pulse wire sensor, e.g. Wiegand wire

Definitions

  • the invention relates to a sensor device with an excitation magnet for generating an alternating excitation magnetic field, an energy generator with a pulse wire element in which electrical energy pulses can be generated by the alternating excitation magnetic field, at least one sensor element for detecting a physical variable and for providing a sensor signal, an evaluation unit for Evaluation of the sensor signal.
  • the invention also relates to a fluid flow measuring arrangement with such a sensor device.
  • Such sensor devices or fluid flow measuring arrangements can be used, for example, in complex industrial plants.
  • such sensor devices can be used, for example, to detect the rotational movement of a machine shaft
  • such fluid flow measuring arrangements can be used, for example, to detect the flow of a gas or liquid line.
  • a fluid flow measuring arrangement with such a sensor device is known, the exciter magnet of the sensor device being arranged on a shaft driven by a gas flow.
  • the disclosed sensor device comprises a position sensor for detecting a current angle of rotation of the shaft and a temperature sensor and a pressure sensor for detecting the current temperature and the current pressure of the Fluid flow measuring arrangement of gas flowing through.
  • the disclosed sensor device electrical energy pulses are generated in the pulse wire element of the energy generator during operation by the alternating excitation magnetic field generated by the excitation magnet.
  • the electrical energy generated in this way is sufficient to supply both the multiple sensor elements and the evaluation unit with the electrical energy required in each case for operation.
  • the sensor device of the disclosed fluid flow measuring arrangement consequently operates in an energy self-sufficient manner, so that no external energy supply is required for the operation of the fluid flow measuring arrangement.
  • a wired data connection is required in the disclosed sensor device or fluid flow measuring arrangement. Consequently, either a complex, permanent cable connection to the sensor device or to the fluid flow measuring arrangement must be provided, or the sensor device or fluid flow measuring arrangement must be installed at a relatively easily accessible measuring point so that a cable with the sensor device or fluid flow can be used for reading if necessary -Measuring arrangement can be connected.
  • the object is therefore to create a sensor device or a fluid flow measuring arrangement that can be installed cost-effectively even at measuring points that are difficult to access.
  • the sensor device comprises an excitation magnet for generating an alternating excitation magnetic field.
  • the permanent magnetic exciter magnet is attached to a rotatable shaft in such a way that the alternating excitation magnetic field is generated by a rotary movement of the shaft.
  • the exciter magnet can also be attached to a device that moves linearly back and forth or on any closed curved path. In any case, the movement of the permanent magnet exciter magnet generates an alternating exciter magnetic field, i.e. an exciter magnetic field in which the polarity is continuously reversed, i.e. the (effective) direction of the field lines continuously changes over time.
  • the sensor device comprises an energy generator with a pulse wire module, in which electrical energy pulses can be generated by the alternating excitation magnetic field.
  • the pulse wire module generally has a pulse wire - also referred to as a Wiegand wire - and a coil arrangement that radially surrounds the pulse wire wire.
  • the direction of magnetization of the pulse wire changes suddenly under the influence of an external magnetic field as soon as a specific trigger field strength is exceeded. As a result, a short voltage pulse with a defined electrical energy is generated in the coil arrangement.
  • the reversal of the direction of magnetization of the pulse wire is also referred to below as “triggering” the pulse wire module.
  • the pulse wire module typically has a single pulse wire, but can also have several pulse wires.
  • the sensor device comprises at least one sensor element for detecting a physical variable and for providing a sensor signal.
  • the sensor element can for example be a temperature sensor for detecting a device temperature and / or a fluid temperature, or a pressure sensor for detecting a fluid pressure.
  • the sensor element can, for example, also be a movement and / or acceleration sensor for detecting the movement - including vibrations or brief shocks - and / or the spatial alignment of a device.
  • a force sensor, a magnetic field sensor, a humidity sensor, a sound pressure sensor and / or a volume sensor are also conceivable, for example.
  • the sensor element can be any type of sensor that is designed to detect a physical variable and to provide a sensor signal that is dependent on the detected variable.
  • the sensor device according to the invention can have a single sensor element, or can have several different or similar sensor elements.
  • the sensor device comprises an evaluation unit for evaluating the at least one sensor signal.
  • the evaluation unit is preferably electrically connected to the at least one sensor element.
  • the evaluation unit can in principle be connected to the at least one sensor element via any type of data connection.
  • the evaluation unit evaluates the received sensor signal in a predefined manner in order to determine at least one output parameter.
  • the evaluation unit can have a microcontroller or it can be formed entirely by a microcontroller.
  • the evaluation unit can in principle be formed by any electrical circuit that is suitable for evaluating the at least one sensor signal and determining an output parameter.
  • the sensor device comprises a radio data interface that has a data connection with the evaluation unit connected is.
  • the radio data interface enables wireless communication with an external EDP system with a suitable receiving interface, and in particular enables wireless reading out or transmission of the output parameters determined by the evaluation unit.
  • the sensor device according to the invention is thus basically also suitable for a connection to the so-called “Internet of Things” (IoT: Internet of Things).
  • the radio data interface can, for example, be based on the known interface standards / specifications "(Passive) Wi-Fi” , “LoRa (Backscatter)", “Bluetooth”, “SigFox”, “ZigBee” or "RFID”.
  • the radio data interface can be formed by any type of electrical circuit that enables wireless data transmission
  • the radio data interface is designed in such a way that the electrical energy required for operating the radio data interface can be generated by the radio data interface itself, for example from incident electromagnetic radiation.
  • the radio data interface can also be designed in such a way that it can pass through the Energy generator can be supplied with the required electrical energy.
  • the at least one sensor element and the evaluation unit are each electrically connected to the energy generator and can be supplied with the respectively required electrical energy by this.
  • the individual components can be electrically connected directly to the energy generator or can be indirectly connected to the energy generator, for example via a voltage converter or another sensor device component.
  • the electrical energy required for proper operation of the sensor device is completely generated and provided by the energy generator.
  • the sensor device according to the invention works completely self-sufficient in energy and therefore does not require any external ones Power supply, neither via a cable nor by inserting a battery.
  • the sensor device according to the invention there is no need to provide a cable connection for the energy supply or for the transmission of the output parameters. Furthermore, the sensor device according to the invention does not have to be relatively easily accessible neither for the energy supply (battery replacement) nor for reading out the output parameters. The sensor device according to the invention can therefore be installed cost-effectively even at measuring points that are difficult to access.
  • the fluid flow measuring arrangement comprises a shaft, the current speed of which is proportional to the current fluid flow.
  • the fluid flow measuring arrangement has an impeller connected to the shaft in a rotationally fixed manner, against which the fluid flowing through the fluid flow measuring arrangement flows so that the impeller and consequently also the shaft are driven in rotation by the fluid.
  • the fluid flow measuring arrangement according to the invention comprises a sensor device according to the invention described above, wherein the exciter magnet is attached to the shaft and is thus driven by the fluid flow.
  • the alternation frequency of the excitation magnetic field generated by the excitation magnet is directly proportional to the speed of the shaft and thus to the current fluid flow.
  • the evaluation unit of the sensor device of the fluid flow measuring arrangement is designed to detect a rotary movement of the shaft by evaluating the energy pulses of the pulse wire element.
  • each is in principle Understand the type of processing of energy pulse information, in particular a simple counting of the energy pulses generated.
  • the evaluation unit evaluates the time course of the energy pulses of the pulse wire element in order to determine the alternation frequency of the excitation magnetic field, the current shaft speed and thus the current fluid flow being able to be determined via the current alternation frequency.
  • the energy pulses can either be evaluated continuously or retrospectively using a stored energy pulse curve.
  • At least one sensor element of the sensor device of the fluid flow measuring arrangement according to the invention is arranged and designed such that a physical property of the fluid flowing through the fluid flow measuring arrangement can be detected by the at least one sensor element.
  • About the fluid flow measuring arrangement according to the invention is thus in addition to the current
  • Fluid flow also at least one physical property of the fluid can be detected.
  • the sensor device of the fluid flow measuring arrangement according to the invention can be a
  • the fluid flow measuring arrangement according to the invention is Can also be installed cost-effectively at measuring points that are difficult to access - for example within a complex industrial plant.
  • the energy generator in a preferred embodiment of the invention has an energy store which is electrically connected to the pulse wire module and in which the electrical energy of the energy pulses can be temporarily stored. This enables - from a certain alternation frequency of the excitation magnetic field - an essentially continuous one
  • the energy store enables short-term operation of the sensor device, for example to read out the sensor device via the radio data interface, even when there is no excitation magnetic field and thus when there is no energy generation.
  • the energy store is typically designed in such a way that its storage capacity is greater than the electrical energy of an individual energy pulse. The energy store consequently makes it possible - if the electrical energy of the energy pulses generated is not completely required for the operation of the sensor device - to briefly provide electrical energy that is greater than the electrical energy of an individual energy pulse.
  • the energy store can be designed, for example, as an inexpensive ceramic capacitor.
  • At least one resistive sensor element is advantageously provided, the electrical resistance of which changes as a function of the physical variable to be detected.
  • the resistive sensor element can be implemented simply and inexpensively and requires only a relatively small amount of electrical energy for reliable functioning.
  • the resistive sensor element can be a resistive one Be a temperature sensor, a resistive pressure sensor or a resistive force sensor.
  • each sensor element being designed to detect a different physical variable, and each sensor element being able to be supplied with electrical energy by the energy generator.
  • the sensor device is therefore suitable for detecting various physical variables and, in particular, for correlating them with one another during the evaluation. This enables a particularly precise evaluation and thus creates a reliable and versatile energy-self-sufficient sensor device.
  • the radio data interface works on the principle of modulated backscattering. This means that the radio data interface does not generate its own radio signals, but rather reflects incoming radio signals and modulates them - usually by means of field weakening in opposite phase. In comparison to the active generation of radio signals, significantly less electrical energy is required for this.
  • the radio data interface is particularly preferably designed in such a way that the electrical energy required for the modulation is generated from incident electromagnetic radiation, so that no external energy supply is required to operate the radio data interface. This consequently creates a particularly energy-efficient radio data interface that enables reliable data transmission without an external energy supply or with only a relatively small external energy supply.
  • the radio data interface is preferably electrically connected to the energy generator.
  • the radio data interface can be directly connected electrically to the energy generator, or can be indirectly - for example, be connected to the energy generator via a voltage converter or some other sensor device component. In any case, an energy transfer - that is to say a transfer of electrical energy - between the radio data interface and the energy generator is possible.
  • the electrical connection is preferably designed in such a way that bidirectional energy transmission is possible, i.e. both a transmission of electrical energy from the energy generator to the radio data interface and a transmission of electrical energy from the radio data interface to the energy generator.
  • the radio data interface is designed in such a way that more electrical energy is generated in the radio data interface than is required to operate the radio data interface, then this energy can be provided to the energy generator and thus used to supply the sensor device with energy. If the radio data interface does not generate electrical energy or the electrical energy generated in the radio data interface should not be sufficient for its operation, then the required electrical energy can be made available via the electrical connection from the energy generator to the radio data interface. In this way, reliable functioning of the radio data interface is ensured.
  • the data interface thus creates a particularly reliable and energy-efficient sensor device.
  • a data memory is advantageously provided which is connected to the evaluation unit via a data connection.
  • the data memory enables the output parameters determined by the evaluation unit to be stored so that they do not have to be transmitted continuously, but can be read out and / or transmitted collectively if required.
  • the data memory is preferably a non-volatile data memory - for example a ferroelectric one Memory - designed so that the data can still be read out even after an interruption in the power supply. This creates an energy efficient and reliable sensor device.
  • the exciter magnet of the sensor device is typically arranged on a rotatable shaft.
  • the evaluation unit is designed to detect a rotary movement of the shaft by evaluating the energy pulses of the pulse wire element.
  • Evaluation of the energy pulses is to be understood here in principle as any type of processing of energy pulse information, in particular also simple counting of the energy pulses generated.
  • the evaluation of the energy pulses can either take place continuously or can also take place retrospectively on the basis of a stored energy pulse curve.
  • the evaluation unit evaluates the time course of the energy pulses of the pulse wire element in order to determine the alternation frequency of the excitation magnetic field.
  • the exciter magnet is arranged on the shaft in such a way that the current alternation frequency of the exciter magnetic field is directly proportional to a current shaft speed. No additional sensor element is therefore required to detect the rotary movement of the shaft. This creates an inexpensive and energy-efficient sensor device that can be used in many ways.
  • FIG. 10 Shows measuring arrangement with the sensor device according to the invention.
  • the figure shows a fluid flow measuring arrangement 10 with a sensor device 12 and a shaft 14.
  • the shaft 14 is non-rotatably with connected to an impeller 16, which is arranged in a fluid channel 18 through which a fluid flows.
  • the impeller 16 is designed such that the impeller 16 - and consequently also the shaft 14 - are rotationally driven by the fluid flowing through the fluid channel 18.
  • the sensor device 12 comprises a permanent magnetic exciter magnet 20 which is attached to an end of the shaft 14 facing away from the impeller 16.
  • the exciter magnet 20 is non-rotatably connected to the shaft 14 and is designed and arranged in such a way that the exciter magnet 20 generates an alternating excitation magnetic field when the shaft 14 rotates.
  • the sensor device 12 further comprises an energy generator 22 with a pulse wire module 24 and an energy store 26.
  • the energy store 26 is electrically connected to the pulse wire module 24 and can be formed, for example, by a simple capacitor. Due to the alternating excitation magnetic field, the direction of magnetization of a pulse wire 28 (Wiegand wire) of the pulse wire module 24 changes continuously, with an electrical energy pulse being generated in a coil arrangement 30 radially surrounding the pulse wire 28 with each change in the direction of magnetization.
  • the energy store 26 is charged by the electrical energy of the energy pulses generated. The generated electrical energy is thus temporarily stored in the energy store 26.
  • the energy store 26 is designed such that its storage capacity is greater than the electrical energy of an individual energy pulse.
  • the sensor device 12 comprises two sensor elements 32, 34 which are arranged in the fluid channel 18 in order to determine a physical property of the fluid channel 18 flowing through Capture fluids.
  • the two sensor elements 32, 34 are each electrically connected to the energy generator 22 for energy supply, the energy generator 22 providing the two sensor elements 32, 34 each with all of the electrical energy required for operation.
  • the first sensor element 32 is a resistive temperature sensor, the electrical resistance of which changes as a function of the temperature.
  • the first sensor element 32 therefore provides a temperature sensor signal when a constant electrical voltage is applied, the current intensity of which is proportional to the detected temperature.
  • the first sensor element 32 can also be supplied with a constant electrical current, in which case an electrical voltage of the temperature sensor signal is proportional to the detected temperature.
  • the second sensor element 34 is a resistive pressure sensor, the electrical resistance of which changes as a function of the ambient pressure.
  • the second sensor element 34 therefore provides a pressure sensor signal when a constant electrical voltage is applied, the current strength of which is proportional to the detected ambient pressure, or when energized with a constant electrical current, it provides a pressure sensor signal whose electrical voltage is proportional to the detected Ambient pressure is.
  • the sensor device 12 further comprises an evaluation unit 36 which is electrically connected to the energy generator 22 for the energy supply, the energy generator 22 providing the evaluation unit 36 with all the electrical energy required for operation.
  • the evaluation unit 36 is electrically connected to the two for sensor signal transmission Sensor elements 32,34 connected.
  • the evaluation unit 36 for the sensor signal transmission can also be connected to the sensor elements 32, 34 via any type of data interface.
  • the evaluation unit 36 is designed to evaluate the sensor signals received from the two sensor elements 32, 34 and to determine and provide corresponding output parameters.
  • the evaluation unit 36 is also designed in the present exemplary embodiment, the time course of the in the pulse wire element 24 of the
  • Energy generator 22 to evaluate generated energy pulses and thereby to determine and provide a current speed and / or a current angle of rotation of the shaft 14.
  • the sensor device 12 further includes a radio data interface 38 which is electrically connected to the energy generator 22.
  • the radio data interface 38 is via a data connection with the
  • the radio data interface enables, for example, a wireless transmission of the output parameters determined by the evaluation unit 36 to an external EDP system (not shown) with a corresponding receiving interface.
  • the radio data interface 38 works in the present embodiment according to the principle of modulated backscattering, for example according to the known "LoRa Backscatter" specification.
  • the electrical energy required to operate the radio data interface 38 is - ideally completely - from received electromagnetic radiation
  • the radio data interface 38 can even provide electrical energy to the energy generator 22 if the radio Data interface 38 generates more electrical energy than for theirs Operation is required. If the electrical energy generated in the radio data interface 38 is temporarily insufficient for the operation of the radio data interface 38, the missing electrical energy can, however, also be provided by the energy generator 22 to the radio data interface 38.
  • the sensor device 12 furthermore comprises a data memory 40 which is electrically connected to the energy generator 22 for supplying energy, the energy generator 22 providing the data memory 40 with all of the electrical energy required for operation.
  • the data memory 40 is preferably designed as a non-volatile ferroelectric data memory.
  • the data memory 40 is connected to the evaluation unit 36 via a data connection - preferably via a simple electrical connection - and enables, for example, the storage of the output parameters determined by the evaluation unit 36.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Electromagnetism (AREA)
  • Measuring Volume Flow (AREA)
  • Arrangements For Transmission Of Measured Signals (AREA)

Abstract

The invention relates to a sensor device (12), comprising: an excitation magnet (20) for producing an alternating excitation magnetic field; an energy generator (22) having a pulse wire module (24), in which electrical energy pulses can be produced by means of the alternating excitation magnetic field; at least one sensor element (32, 34) for sensing a physical variable and for providing a sensor signal; an evaluation unit (36) for evaluating the at least one sensor signal; and a radio data interface (38), which is connected to the evaluation unit by means of a data connection, wherein the at least one sensor element (32, 34) and the evaluation unit (36) are each electrically connected to the energy generator (22) and can be supplied with electrical energy by the energy generator. The invention also relates to a fluid flow-rate measuring assembly (10) having a sensor device (12) of this type. The sensor device (12) and the fluid flow-rate measuring assembly (10) according to the invention do not require an external cable connection for energy supply or for data transfer and therefore can be installed economically even in measurement locations that are difficult to access.

Description

B E S C H R E I B U N G Sensorvorrichtung und Fluiddurchfluss-Messanordnung mit einer derartigen Sensorvorrichtung B E S C H R E I B U N G Sensor device and fluid flow measuring arrangement with such a sensor device
Die Erfindung betrifft eine Sensorvorrichtung mit einem Erregermagneten zur Erzeugung eines alternierenden Erregermagnetfelds, einem Energiegenerator mit einem Impulsdraht-Element, in dem durch das alternierende Erregermagnetfeld elektrische Energiepulse erzeugbar sind, mindestens einem Sensorelement zur Erfassung einer physikalischen Größe und zur Bereitstellung eines Sensorsignals, einer Auswerteeinheit zur Auswertung des Sensorsignals. Die Erfindung betrifft ferner eine Fluiddurchfluss-Messanordnung mit einer derartigen Sensorvorrichtung. The invention relates to a sensor device with an excitation magnet for generating an alternating excitation magnetic field, an energy generator with a pulse wire element in which electrical energy pulses can be generated by the alternating excitation magnetic field, at least one sensor element for detecting a physical variable and for providing a sensor signal, an evaluation unit for Evaluation of the sensor signal. The invention also relates to a fluid flow measuring arrangement with such a sensor device.
Derartige Sensorvorrichtungen beziehungsweise Fluiddurchfluss- Messanordnungen können beispielsweise in komplexen Industrieanlagen verwendet werden. H ierbei können derartige Sensorvorrichtungen beispielsweise zur Erfassung der Drehbewegung einer Maschinenwelle verwendet werden, und können derartige Fluiddurchfluss- Messanordnungen beispielsweise zur Erfassung des Durchflusses einer Gas- oder Flüssigkeitsleitung verwendet werden. Aus der EP 2 479 542 Bl ist beispielsweise eine Fluiddurchfluss- Messanordnung mit einer derartigen Sensorvorrichtung bekannt, wobei der Erregermagnet der Sensorvorrichtung an einer durch einen Gasdurchfluss angetriebenen Welle angeordnet ist. Die offenbarte Sensorvorrichtung umfasst einen Positionssensor zur Erfassung eines aktuellen Drehwinkels der Welle sowie einen Temperatursensor und einen Drucksensor zur Erfassung der aktuellen Temperatur und des aktuellen Drucks des die Fluiddurchfluss-Messanordnung durchströmenden Gases. Bei der offenbarten Sensorvorrichtung werden im Betrieb durch das von dem Erregermagneten erzeugte alternierende Erregermagnetfeld in dem Impulsdraht-Element des Energiegenerators elektrische Energiepulse erzeugt. Die derart erzeugte elektrische Energie ist hierbei ausreichend, um sowohl die mehreren Sensorelemente als auch die Auswerteeinheit mit der jeweils für den Betrieb benötigten elektrischen Energie zu versorgen. Die Sensorvorrichtung der offenbarten Fluiddurchfluss-Messanordnung arbeitet folglich energieautark, sodass für den Betrieb der Fluiddurchfluss- Messanordnung keine externe Energiezufuhr erforderlich ist. Such sensor devices or fluid flow measuring arrangements can be used, for example, in complex industrial plants. Here, such sensor devices can be used, for example, to detect the rotational movement of a machine shaft, and such fluid flow measuring arrangements can be used, for example, to detect the flow of a gas or liquid line. From EP 2 479 542 B1, for example, a fluid flow measuring arrangement with such a sensor device is known, the exciter magnet of the sensor device being arranged on a shaft driven by a gas flow. The disclosed sensor device comprises a position sensor for detecting a current angle of rotation of the shaft and a temperature sensor and a pressure sensor for detecting the current temperature and the current pressure of the Fluid flow measuring arrangement of gas flowing through. With the disclosed sensor device, electrical energy pulses are generated in the pulse wire element of the energy generator during operation by the alternating excitation magnetic field generated by the excitation magnet. The electrical energy generated in this way is sufficient to supply both the multiple sensor elements and the evaluation unit with the electrical energy required in each case for operation. The sensor device of the disclosed fluid flow measuring arrangement consequently operates in an energy self-sufficient manner, so that no external energy supply is required for the operation of the fluid flow measuring arrangement.
Zum Auslesen der erfassten und/oder ermittelten Ausgabeparameter ist bei der offenbarten Sensorvorrichtung beziehungsweise Fluiddurchfluss- Messanordnung jedoch eine kabelgebundene Datenverbindung erforderlich. Es muss folglich entweder eine aufwendig installierte dauerhafte Kabelverbindung zu der Sensorvorrichtung beziehungsweise zu der Fluiddurchfluss-Messanordnung vorgesehen sein, oder die Sensorvorrichtung beziehungsweise Fluiddurchfluss-Messanordnung muss an einer relativ leicht zugänglichen Messtelle installiert sein, sodass zum Auslesen bei Bedarf ein Kabel mit der Sensorvorrichtung beziehungsweise Fluiddurchfluss-Messanordnung verbindbar ist. In order to read out the recorded and / or determined output parameters, however, a wired data connection is required in the disclosed sensor device or fluid flow measuring arrangement. Consequently, either a complex, permanent cable connection to the sensor device or to the fluid flow measuring arrangement must be provided, or the sensor device or fluid flow measuring arrangement must be installed at a relatively easily accessible measuring point so that a cable with the sensor device or fluid flow can be used for reading if necessary -Measuring arrangement can be connected.
Es stellt sich daher die Aufgabe, eine Sensorvorrichtung beziehungsweise eine Fluiddurchfluss-Messanordnung zu schaffen, die kostengünstig auch an schwer zugänglichen Messstellen installierbar ist. The object is therefore to create a sensor device or a fluid flow measuring arrangement that can be installed cost-effectively even at measuring points that are difficult to access.
Diese Aufgabe wird durch eine Sensorvorrichtung mit den Merkmalen des Anspruchs 1 beziehungsweise durch eine Fluiddurchfluss-Messanordnung mit den Merkmalen des Anspruchs 9 gelöst. Die erfindungsgemäße Sensorvorrichtung umfasst einen Erregermagneten zur Erzeugung eines alternierenden Erregermagnetfelds. Typischerweise ist der permanentmagnetische Erregermagnet derart an einer drehbaren Welle angebracht, dass durch eine Drehbewegung der Welle das alternierende Erregermagnetfeld erzeugt wird. Alternativ kann der Erregermagnet jedoch auch an einer Vorrichtung angebracht sein, die sich linear vor und zurück oder auf einer beliebigen geschlossenen Kurvenbahn bewegt. In jedem Fall wird durch die Bewegung des permanentmagnetischen Erregermagneten ein alternierendes Erregermagnetfeld erzeugt, also ein Erregermagnetfeld, bei dem sich die Polarität kontinuierlich umkehrt, also die (effektive) Richtung der Feldlinien im zeitlichen Verlauf kontinuierlich wechselt. This object is achieved by a sensor device with the features of claim 1 or by a fluid flow measuring arrangement with the features of claim 9. The sensor device according to the invention comprises an excitation magnet for generating an alternating excitation magnetic field. Typically, the permanent magnetic exciter magnet is attached to a rotatable shaft in such a way that the alternating excitation magnetic field is generated by a rotary movement of the shaft. Alternatively, however, the exciter magnet can also be attached to a device that moves linearly back and forth or on any closed curved path. In any case, the movement of the permanent magnet exciter magnet generates an alternating exciter magnetic field, i.e. an exciter magnetic field in which the polarity is continuously reversed, i.e. the (effective) direction of the field lines continuously changes over time.
Die erfindungsgemäße Sensorvorrichtung umfasst einen Energiegenerator mit einem Impulsdraht-Modul, in dem durch das alternierende Erregermagnetfeld elektrische Energiepulse erzeugbar sind. Das Impulsdraht-Modul weist im Allgemeinen einen Impulsdraht - auch als Wiegand-Draht bezeichnet - und eine den Impulsdraht-Draht radial umschließende Spulenanordnung auf. Die Magnetisierungsrichtung des Impulsdrahts klappt unter Einwirkung eines externen Magnetfelds schlagartig um, sobald eine spezifische Auslösefeldstärke überschritten wird. Flierdurch wird in der Spulenanordnung ein kurzer Spannungspuls mit einer definierten elektrischen Energie erzeugt. Das Umklappen der Magnetisierungsrichtung des Impulsdrahts wird nachfolgend auch als „Auslösen" des Impulsdraht-Moduls bezeichnet. Das Impulsdraht-Modul weist typischerweise einen einzigen Impulsdraht auf, kann jedoch auch mehrere Impulsdrähte aufweisen. The sensor device according to the invention comprises an energy generator with a pulse wire module, in which electrical energy pulses can be generated by the alternating excitation magnetic field. The pulse wire module generally has a pulse wire - also referred to as a Wiegand wire - and a coil arrangement that radially surrounds the pulse wire wire. The direction of magnetization of the pulse wire changes suddenly under the influence of an external magnetic field as soon as a specific trigger field strength is exceeded. As a result, a short voltage pulse with a defined electrical energy is generated in the coil arrangement. The reversal of the direction of magnetization of the pulse wire is also referred to below as “triggering” the pulse wire module. The pulse wire module typically has a single pulse wire, but can also have several pulse wires.
Die erfindungsgemäße Sensorvorrichtung umfasst mindestens ein Sensorelement zur Erfassung einer physikalischen Größe und zur Bereitstellung eines Sensorsignals. Das Sensorelement kann beispielweise ein Temperatursensor zur Erfassung einer Vorrichtungstemperatur und/oder einer Fluidtemperatur sein, oder ein Drucksensor zur Erfassung eines Fluiddrucks sein. Das Sensorelement kann beispielsweise auch ein Bewegungs- und/oder Beschleunigungssensor zur Erfassung der Bewegung - auch von Vibrationen oder kurzzeitigen Erschütterungen - und/oder der räumlichen Ausrichtung einer Vorrichtung sein. Auch denkbar sind beispielsweise ein Kraftsensor, ein Magnetfeldsensor, ein Feuchtigkeitssensor, ein Schalldrucksensor und/oder ein Flelligkeitssensor. Grundsätzlich kann das Sensorelement jede beliebige Art von Sensor sein, der ausgebildet ist, eine physikalische Größe zu erfassen und ein von der erfassten Größe abhängiges Sensorsignal bereitzustellen. Die erfindungsgemäße Sensorvorrichtung kann ein einziges Sensorelement aufweisen, oder kann mehrere verschiedenartige oder gleichartige Sensorelemente aufweisen. The sensor device according to the invention comprises at least one sensor element for detecting a physical variable and for providing a sensor signal. The sensor element can for example be a temperature sensor for detecting a device temperature and / or a fluid temperature, or a pressure sensor for detecting a fluid pressure. The sensor element can, for example, also be a movement and / or acceleration sensor for detecting the movement - including vibrations or brief shocks - and / or the spatial alignment of a device. A force sensor, a magnetic field sensor, a humidity sensor, a sound pressure sensor and / or a volume sensor are also conceivable, for example. In principle, the sensor element can be any type of sensor that is designed to detect a physical variable and to provide a sensor signal that is dependent on the detected variable. The sensor device according to the invention can have a single sensor element, or can have several different or similar sensor elements.
Die erfindungsgemäße Sensorvorrichtung umfasst eine Auswerteeinheit zur Auswertung des mindestens einen Sensorsignals. Für die Sensorsignal- Übertragung ist die Auswerteeinheit vorzugsweise elektrisch mit dem mindestens einen Sensorelement verbunden. Die Auswerteeinheit kann jedoch grundsätzlich über jede Art von Datenverbindung mit dem mindestens einen Sensorelement verbunden sein. Die Auswerteeinheit wertet das empfangene Sensorsignal auf eine vordefinierte Art und Weise aus, um mindestens einen Ausgabeparameter zu bestimmen. Die Auswerteeinheit kann einen Microkontroller aufweisen oder vollständig durch einen Microkontroller ausgebildet sein. Die Auswerteeinheit kann jedoch grundsätzlich durch jede beliebige elektrische Schaltung gebildet sein, die geeignet ist, das mindestens eine Sensorsignal auszuwerten und einen Ausgabeparameter zu bestimmen. Die erfindungsgemäße Sensorvorrichtung umfasst eine Funk- Datenschnittstelle, die über eine Datenverbindung mit der Auswerteeinheit verbunden ist. Die Funk-Datenschnittstelle ermöglicht eine kabellose Kommunikation mit einem externen EDV-System mit einer geeigneten Empfangsschnittstelle, und ermöglicht insbesondere ein kabelloses Auslesen beziehungsweise Übermitteln des von der Auswerteeinheit ermittelten Ausgabeparameters. Die erfindungsgemäße Sensorvorrichtung ist somit grundsätzlich auch für eine Anbindung an das sogenannte „Internet der Dinge" (IoT: Internet of Things) geeignet. Die Funk- Datenschnittstelle kann beispielsweise auf den bekannten Schnittstellen- Standards/-Spezifikationen „(Passive) Wi-Fi", „LoRa (Backscatter)", „Bluetooth",„SigFox",„ZigBee" oder„RFID" basieren. Grundsätzlich kann die Funk-Datenschnittstelle jedoch durch jede beliebige Art von elektrischer Schaltung gebildet sein, die eine kabellose Datenübertragung ermöglicht. Vorzugsweise ist die Funk-Datenschnittstelle derart ausgebildet, dass die für den Betrieb der Funk-Datenschnittstelle benötigte elektrische Energie von der Funk-Datenschnittstelle selbst erzeugbar ist, beispielweise aus einfallender elektromagnetischer Strahlung. Alternativ kann die Funk-Datenschnittstelle jedoch auch derart ausgebildet sein, dass sie durch den Energiegenerator mit der benötigten elektrischen Energie versorgbar ist. The sensor device according to the invention comprises an evaluation unit for evaluating the at least one sensor signal. For the sensor signal transmission, the evaluation unit is preferably electrically connected to the at least one sensor element. However, the evaluation unit can in principle be connected to the at least one sensor element via any type of data connection. The evaluation unit evaluates the received sensor signal in a predefined manner in order to determine at least one output parameter. The evaluation unit can have a microcontroller or it can be formed entirely by a microcontroller. However, the evaluation unit can in principle be formed by any electrical circuit that is suitable for evaluating the at least one sensor signal and determining an output parameter. The sensor device according to the invention comprises a radio data interface that has a data connection with the evaluation unit connected is. The radio data interface enables wireless communication with an external EDP system with a suitable receiving interface, and in particular enables wireless reading out or transmission of the output parameters determined by the evaluation unit. The sensor device according to the invention is thus basically also suitable for a connection to the so-called "Internet of Things" (IoT: Internet of Things). The radio data interface can, for example, be based on the known interface standards / specifications "(Passive) Wi-Fi" , "LoRa (Backscatter)", "Bluetooth", "SigFox", "ZigBee" or "RFID". In principle, however, the radio data interface can be formed by any type of electrical circuit that enables wireless data transmission The radio data interface is designed in such a way that the electrical energy required for operating the radio data interface can be generated by the radio data interface itself, for example from incident electromagnetic radiation. Alternatively, however, the radio data interface can also be designed in such a way that it can pass through the Energy generator can be supplied with the required electrical energy.
Erfindungsgemäß sind das mindestens eine Sensorelement und die Auswerteeinheit jeweils elektrisch mit dem Energiegenerator verbunden und durch diesen mit der jeweils benötigten elektrischen Energie versorgbar. Die einzelnen Komponenten können direkt elektrisch mit dem Energiegenerator verbunden sein, oder können indirekt - beispielsweise über einen Spannungswandler oder eine andere Sensorvorrichtungs- Komponente mit dem Energiegenerator verbunden sein. In jedem Fall wird die für einen ordnungsgemäßen Betrieb der Sensorvorrichtung benötigte elektrische Energie vollständig von dem Energiegenerator erzeugt und bereitgestellt. Die erfindungsgemäße Sensorvorrichtung arbeitet vollständig energieautark und benötigt somit keine externe Energieversorgung, weder über ein Kabel noch durch das Einsetzen einer Batterie. According to the invention, the at least one sensor element and the evaluation unit are each electrically connected to the energy generator and can be supplied with the respectively required electrical energy by this. The individual components can be electrically connected directly to the energy generator or can be indirectly connected to the energy generator, for example via a voltage converter or another sensor device component. In any case, the electrical energy required for proper operation of the sensor device is completely generated and provided by the energy generator. The sensor device according to the invention works completely self-sufficient in energy and therefore does not require any external ones Power supply, neither via a cable nor by inserting a battery.
Bei der erfindungsgemäßen Sensorvorrichtung muss weder für die Energieversorgung noch für das Übertragen der Ausgabeparameter eine Kabelverbindung vorgesehen werden. Ferner muss die erfindungsgemäße Sensorvorrichtung weder für die Energieversorgung (Batteriewechsel), noch für das Auslesen der Ausgabeparameter relativ leicht zugänglich sein. Die erfindungsgemäße Sensorvorrichtung ist daher kostengünstig auch an schwer zugänglichen Messstellen installierbar. In the sensor device according to the invention, there is no need to provide a cable connection for the energy supply or for the transmission of the output parameters. Furthermore, the sensor device according to the invention does not have to be relatively easily accessible neither for the energy supply (battery replacement) nor for reading out the output parameters. The sensor device according to the invention can therefore be installed cost-effectively even at measuring points that are difficult to access.
Die erfindungsgemäße Fluiddurchfluss-Messanordnung umfasst eine Welle, deren aktuelle Drehzahl proportional zu dem aktuellen Fluiddurchfluss ist. Typischerweise weist die Fluiddurchfluss-Messanordnung ein drehfest mit der Welle verbundenes Flügelrad auf, das von dem durch die Fluiddurchfluss-Messanordnung fließenden Fluid angeströmt wird, sodass das Flügelrad und folglich auch die Welle von dem Fluid rotatorisch angetrieben sind. Die erfindungsgemäße Fluiddurchfluss-Messanordnung umfasst eine zuvor beschriebene erfindungsgemäße Sensorvorrichtung, wobei der Erregermagnet an der Welle befestigt ist und somit durch den Fluiddurchfluss angetrieben ist. H ierbei ist die Alternierungsfrequenz des von dem Erregermagneten erzeugten Erregermagnetfelds direkt proportional zu der Drehzahl der Welle und somit zu dem aktuellen Fluiddurchfluss. The fluid flow measuring arrangement according to the invention comprises a shaft, the current speed of which is proportional to the current fluid flow. Typically, the fluid flow measuring arrangement has an impeller connected to the shaft in a rotationally fixed manner, against which the fluid flowing through the fluid flow measuring arrangement flows so that the impeller and consequently also the shaft are driven in rotation by the fluid. The fluid flow measuring arrangement according to the invention comprises a sensor device according to the invention described above, wherein the exciter magnet is attached to the shaft and is thus driven by the fluid flow. The alternation frequency of the excitation magnetic field generated by the excitation magnet is directly proportional to the speed of the shaft and thus to the current fluid flow.
Die Auswerteeinheit der Sensorvorrichtung der erfindungsgemäßen Fluiddurchfluss-Messanordnung ist ausgebildet, durch Auswertung der Energiepulse des Impulsdraht-Elements eine Drehbewegung der Welle zu erfassen. Unter Auswertung der Energiepulse ist hierbei grundsätzlich jede Art von Verarbeitung einer Energiepuls-Information zu verstehen, insbesondere auch ein einfaches Zählen der erzeugten Energiepulse. Typischerweise wertet die Auswerteeinheit den zeitlichen Verlauf der Energiepulse des Impulsdraht-Elements aus, um daraus die Alternierungsfrequenz des Erregermagnetfelds zu bestimmen, wobei über die aktuelle Alternierungsfrequenz wiederum die aktuelle Wellendrehzahl und somit der aktuelle Fluiddurchfluss bestimmbar sind. Die Auswertung der Energiepulse kann hierbei entweder fortlaufend erfolgen, oder kann auch rückwirkend anhand eines gespeicherten Energiepuls-Verlaufs erfolgen. The evaluation unit of the sensor device of the fluid flow measuring arrangement according to the invention is designed to detect a rotary movement of the shaft by evaluating the energy pulses of the pulse wire element. When evaluating the energy pulses, each is in principle Understand the type of processing of energy pulse information, in particular a simple counting of the energy pulses generated. Typically, the evaluation unit evaluates the time course of the energy pulses of the pulse wire element in order to determine the alternation frequency of the excitation magnetic field, the current shaft speed and thus the current fluid flow being able to be determined via the current alternation frequency. The energy pulses can either be evaluated continuously or retrospectively using a stored energy pulse curve.
Mindestens ein Sensorelement der Sensorvorrichtung der erfindungsgemäßen Fluiddurchfluss-Messanordnung ist derart angeordnet und ausgebildet, dass durch das mindestens eine Sensorelement eine physikalische Eigenschaft des die Fluiddurchfluss-Messandordnung durchströmenden Fluids erfassbar ist. Über die erfindungsgemäße Fluiddurchfluss-Messanordnung ist somit neben dem aktuellenAt least one sensor element of the sensor device of the fluid flow measuring arrangement according to the invention is arranged and designed such that a physical property of the fluid flowing through the fluid flow measuring arrangement can be detected by the at least one sensor element. About the fluid flow measuring arrangement according to the invention is thus in addition to the current
Fluiddurchfluss auch mindestens eine physikalische Eigenschaft des Fluids erfassbar. Beispielsweise kann die Sensorvorrichtung der erfindungsgemäßen Fluiddurchfluss-Messanordnung einenFluid flow also at least one physical property of the fluid can be detected. For example, the sensor device of the fluid flow measuring arrangement according to the invention can be a
Temperatursensor und/oder einen Drucksensor zur Erfassung der aktuellen Fluidtemperatur und/oder des aktuellen Fluiddrucks aufweisen. Dies schafft eine vielseitig einsetzbare Fluiddurchfluss-Messanordnung. Durch Korrelation mit den erfassten physikalischen Fluid-Eigenschaften ist ferner eine besonders exakte Erfassung des Fluiddurchflusses möglich. Have temperature sensor and / or a pressure sensor for detecting the current fluid temperature and / or the current fluid pressure. This creates a versatile fluid flow measuring arrangement. Correlation with the recorded physical fluid properties also enables particularly precise recording of the fluid flow.
Da bei der erfindungsgemäßen Sensorvorrichtung weder für die Energieversorgung, noch für das Auslesen beziehungsweise das Übertragen der Ausgabeparameter eine Kabelverbindung vorgesehen werden muss, ist die erfindungsgemäße Fluiddurchfluss-Messanordnung kostengünstig auch an schwer zugänglichen Messstellen - beispielsweise innerhalb einer komplexen Industrieanlage - installierbar. Since a cable connection does not have to be provided in the sensor device according to the invention neither for the energy supply nor for reading out or transmitting the output parameters, the fluid flow measuring arrangement according to the invention is Can also be installed cost-effectively at measuring points that are difficult to access - for example within a complex industrial plant.
Da beim Auslösen des Impulsdraht-Moduls lediglich relativ kurze Energiepulse erzeugt werden, weist der Energiegenerator in einer bevorzugten Ausführung der Erfindung einen Energiespeicher auf, der elektrisch mit dem Impulsdraht-Modul verbunden ist, und in dem die elektrische Energie der Energiepulse zwischengespeichert werden kann. Dies ermöglicht - ab einer bestimmten Alternierungsfrequenz des Erregermagnetfelds - eine im Wesentlichen kontinuierlicheSince only relatively short energy pulses are generated when the pulse wire module is triggered, the energy generator in a preferred embodiment of the invention has an energy store which is electrically connected to the pulse wire module and in which the electrical energy of the energy pulses can be temporarily stored. This enables - from a certain alternation frequency of the excitation magnetic field - an essentially continuous one
Energieversorgung der Sensorvorrichtungs-Komponenten. Ferner ermöglicht der Energiespeicher auch bei fehlendem Erregermagnetfeld und somit bei ausbleibender Energieerzeugung einen kurzzeitigen Betrieb der Sensorvorrichtung, beispielsweise zum Auslesen der Sensorvorrichtung über die Funk-Datenschnittstelle. Der Energiespeicher ist typischerweise derart ausgebildet, dass seine Speicherkapazität größer ist als die elektrische Energie eines einzelnen Energiepulses. Der Energiespeicher ermöglicht es folglich - sofern die elektrische Energie der erzeugten Energiepulse nicht vollständig für den Betrieb der Sensorvorrichtung benötigt wird - kurzzeitig eine elektrische Energie bereitzustellen, die größer ist als die elektrische Energie eines einzelnen Energiepulses. Der Energiespeicher kann beispielweise als kostengünstiger Keramikkondensator ausgebildet sein. Vorteilhafterweise ist mindestens ein resistives Sensorelement vorgesehen, dessen elektrischer Widerstand sich in Abhängigkeit der zu erfassenden physikalischen Größe verändert. Das resistive Sensorelement ist einfach und kostengünstig realisierbar und benötigt für eine zuverlässige Funktion nur eine relativ geringe elektrische Energie. Beispielsweise kann das resistive Sensorelement ein resistiver Temperatursensor, ein resistiver Drucksensor oder ein resistiver Kraftsensor sein. Power supply of the sensor device components. Furthermore, the energy store enables short-term operation of the sensor device, for example to read out the sensor device via the radio data interface, even when there is no excitation magnetic field and thus when there is no energy generation. The energy store is typically designed in such a way that its storage capacity is greater than the electrical energy of an individual energy pulse. The energy store consequently makes it possible - if the electrical energy of the energy pulses generated is not completely required for the operation of the sensor device - to briefly provide electrical energy that is greater than the electrical energy of an individual energy pulse. The energy store can be designed, for example, as an inexpensive ceramic capacitor. At least one resistive sensor element is advantageously provided, the electrical resistance of which changes as a function of the physical variable to be detected. The resistive sensor element can be implemented simply and inexpensively and requires only a relatively small amount of electrical energy for reliable functioning. For example, the resistive sensor element can be a resistive one Be a temperature sensor, a resistive pressure sensor or a resistive force sensor.
In einer vorteilhaften Ausführung der Erfindung sind mehrere Sensorelement vorgesehen, wobei jedes Sensorelement zur Erfassung einer unterschiedlichen physikalischen Größe ausgebildet ist, und wobei jedes Sensorelement durch den Energiegenerator mit elektrischer Energie versorgbar ist. Die Sensorvorrichtung ist somit geeignet, verschiedene physikalische Größen zu erfassen und insbesondere auch bei der Auswertung miteinander zu korrelieren. Dies ermöglicht eine besonders exakte Auswertung und schafft somit eine zuverlässige und vielseitig einsetzbare energieautarke Sensorvorrichtung. In an advantageous embodiment of the invention, several sensor elements are provided, each sensor element being designed to detect a different physical variable, and each sensor element being able to be supplied with electrical energy by the energy generator. The sensor device is therefore suitable for detecting various physical variables and, in particular, for correlating them with one another during the evaluation. This enables a particularly precise evaluation and thus creates a reliable and versatile energy-self-sufficient sensor device.
In einer bevorzugten Ausführung der Erfindung arbeitet die Funk- Datenschnittstelle nach dem Prinzip der modulierten Rückstreuung. Dies bedeutet, dass die Funk-Datenschnittstelle keine eigenen Funksignale erzeugt, sondern eingehende Funksignale reflektiert und dabei - in der Regel durch gegenphasige Feldschwächung - moduliert. H ierfü r ist im Vergleich zum aktiven Erzeugen von Funksignalen deutlich weniger elektrische Energie erforderlich. Besonders bevorzugt ist die Funk- Datenschnittstelle hierbei derart ausgebildet, dass die für die Modulierung erforderliche elektrische Energie aus einfallender elektromagnetischer Strahlung erzeugt wird, sodass für den Betrieb der Funk-Datenschnittstelle keine externe Energiezufuhr erforderlich ist. Dies schafft folglich eine besonders energieeffiziente Funk-Datenschnittstelle, die ohne externe Energieversorgung oder mit nur relativ geringer externer Energieversorgung eine zuverlässige Datenübertragung ermöglicht. In a preferred embodiment of the invention, the radio data interface works on the principle of modulated backscattering. This means that the radio data interface does not generate its own radio signals, but rather reflects incoming radio signals and modulates them - usually by means of field weakening in opposite phase. In comparison to the active generation of radio signals, significantly less electrical energy is required for this. The radio data interface is particularly preferably designed in such a way that the electrical energy required for the modulation is generated from incident electromagnetic radiation, so that no external energy supply is required to operate the radio data interface. This consequently creates a particularly energy-efficient radio data interface that enables reliable data transmission without an external energy supply or with only a relatively small external energy supply.
Vorzugsweise ist die Funk-Datenschnittstelle elektrisch mit dem Energiegenerator verbunden. Die Funk-Datenschnittstelle kann direkt elektrisch mit dem Energiegenerator verbunden sein, oder kann indirekt - beispielsweise über einen Spannungswandler oder eine andere Sensorvorrichtungs-Komponente mit dem Energiegenerator verbunden sein. In jedem Fall ist eine Energieübertragung - also eine Übertragung von elektrischer Energie - zwischen der Funk-Datenschnittstelle und dem Energiegenerator möglich. Vorzugsweise ist die elektrische Verbindung hierbei derart ausgebildet, dass eine bidirektionale Energieübertragung möglich ist, also sowohl eine Übertragung von elektrischer Energie aus dem Energiegenerator zu der Funk-Datenschnittstelle als auch eine Übertragung von elektrischer Energie aus der Funk-Datenschnittstelle zu dem Energiegenerator. Falls die Funk-Datenschnittstelle derart ausgebildet ist, dass in der Funk-Datenschnittstelle mehr elektrische Energie erzeugt wird, als für den Betrieb der Funk-Datenschnittstelle benötigt wird, dann kann diese Energie an den Energiegenerator bereitgestellt und somit für die Energieversorgung der Sensorvorrichtung verwendet werden. Falls die Funk-Datenschnittstelle keine elektrische Energie erzeugt oder die in der Funk-Datenschnittstelle erzeugte elektrische Energie für deren Betrieb nicht ausreichen sollte, dann ist die benötigte elektrische Energie über die elektrische Verbindung von dem Energiegenerator an die Funk- Datenschnittstelle bereitstellbar. Auf diese Weise ist eine zuverlässige Funktion der Funk-Datenschnittstelle sichergestellt. Die elektrische Verbindung zwischen dem Energiegenerator und der Funk-The radio data interface is preferably electrically connected to the energy generator. The radio data interface can be directly connected electrically to the energy generator, or can be indirectly - for example, be connected to the energy generator via a voltage converter or some other sensor device component. In any case, an energy transfer - that is to say a transfer of electrical energy - between the radio data interface and the energy generator is possible. The electrical connection is preferably designed in such a way that bidirectional energy transmission is possible, i.e. both a transmission of electrical energy from the energy generator to the radio data interface and a transmission of electrical energy from the radio data interface to the energy generator. If the radio data interface is designed in such a way that more electrical energy is generated in the radio data interface than is required to operate the radio data interface, then this energy can be provided to the energy generator and thus used to supply the sensor device with energy. If the radio data interface does not generate electrical energy or the electrical energy generated in the radio data interface should not be sufficient for its operation, then the required electrical energy can be made available via the electrical connection from the energy generator to the radio data interface. In this way, reliable functioning of the radio data interface is ensured. The electrical connection between the energy generator and the radio
Datenschnittstelle schafft somit eine besonders zuverlässige und energieeffiziente Sensorvorrichtung. Vorteilhafterweise ist ein Datenspeicher vorgesehen, der über eine Datenverbindung mit der Auswerteeinheit verbunden ist. Der Datenspeicher ermöglicht ein Speichern der von der Auswerteeinheit ermittelten Ausgabeparameter, sodass diese nicht kontinuierlich übertragen werden müssen, sondern bei Bedarf gesammelt auslesbar und/oder übertragbar sind. Vorzugsweise ist der Datenspeicher hierbei als nicht-flüchtiger Datenspeicher - beispielsweise als ferroelektrischer Speicher - ausgebildet, sodass die Daten auch nach einer Unterbrechung der Energieversorgung noch auslesbar sind. Dies schafft eine energieeffiziente und zuverlässige Sensorvorrichtung. Typischerweise ist der Erregermanget der Sensorvorrichtung an einer drehbaren Welle angeordnet. In einer vorteilhaften Ausführung der Erfindung ist hierbei die Auswerteeinheit ausgebildet, durch Auswertung der Energiepulse des Impulsdraht-Elements eine Drehbewegung der Welle zu erfassen. Unter Auswertung der Energiepulse ist hierbei grundsätzlich jede Art von Verarbeitung einer Energiepuls-Information zu verstehen, insbesondere auch ein einfaches Zählen der erzeugten Energiepulse. Die Auswertung der Energiepulse kann hierbei entweder fortlaufend erfolgen, oder kann auch rückwirkend anhand eines gespeicherten Energiepuls- Verlaufs erfolgen. Typischerweise wertet die Auswerteeinheit den zeitlichen Verlauf der Energiepulse des Impulsdraht-Elements aus, um daraus die Alternierungsfrequenz des Erregermagnetfelds zu bestimmen. Der Erregermagnet ist hierbei derart an der Welle angeordnet, dass die aktuelle Alternierungsfrequenz des Erregermagnetfelds direkt proportional zu einer aktuellen Wellendrehzahl ist. Für die Erfassung der Wellen- Drehbewegung ist somit kein zusätzliches Sensorelement erforderlich. Dies schafft eine kostengünstige und energieeffiziente Sensorvorrichtung, die vielseitig einsetzbar ist. The data interface thus creates a particularly reliable and energy-efficient sensor device. A data memory is advantageously provided which is connected to the evaluation unit via a data connection. The data memory enables the output parameters determined by the evaluation unit to be stored so that they do not have to be transmitted continuously, but can be read out and / or transmitted collectively if required. The data memory is preferably a non-volatile data memory - for example a ferroelectric one Memory - designed so that the data can still be read out even after an interruption in the power supply. This creates an energy efficient and reliable sensor device. The exciter magnet of the sensor device is typically arranged on a rotatable shaft. In an advantageous embodiment of the invention, the evaluation unit is designed to detect a rotary movement of the shaft by evaluating the energy pulses of the pulse wire element. Evaluation of the energy pulses is to be understood here in principle as any type of processing of energy pulse information, in particular also simple counting of the energy pulses generated. The evaluation of the energy pulses can either take place continuously or can also take place retrospectively on the basis of a stored energy pulse curve. Typically, the evaluation unit evaluates the time course of the energy pulses of the pulse wire element in order to determine the alternation frequency of the excitation magnetic field. The exciter magnet is arranged on the shaft in such a way that the current alternation frequency of the exciter magnetic field is directly proportional to a current shaft speed. No additional sensor element is therefore required to detect the rotary movement of the shaft. This creates an inexpensive and energy-efficient sensor device that can be used in many ways.
Ein Ausführungsbeispiel einer erfindungsgemäßen Fluiddurchfluss- Messanordnung mit einer erfindungsgemäßen Sensorvorrichtung wird nachfolgend anhand der beigefügten Figur beschrieben, die eine schematische Darstellung der erfindungsgemäßen Fluiddurchfluss-An embodiment of a fluid flow measuring arrangement according to the invention with a sensor device according to the invention is described below with reference to the attached figure, which is a schematic representation of the fluid flow according to the invention
Messanordnung mit der erfindungsgemäßen Sensorvorrichtung zeigt. Die Figur zeigt eine Fluiddurchfluss-Messanordnung 10 mit einer Sensorvorrichtung 12 und einer Welle 14. Die Welle 14 ist drehfest mit einem Laufrad 16 verbunden, das in einem Fluidkanal 18 angeordnet, der von einem Fluid durchflossen ist. Das Laufrad 16 ist derart ausgebildet, dass das Laufrad 16 - und folglich auch die Welle 14 - von dem durch den Fluidkanal 18 strömenden Fluid rotatorisch angetrieben werden. Shows measuring arrangement with the sensor device according to the invention. The figure shows a fluid flow measuring arrangement 10 with a sensor device 12 and a shaft 14. The shaft 14 is non-rotatably with connected to an impeller 16, which is arranged in a fluid channel 18 through which a fluid flows. The impeller 16 is designed such that the impeller 16 - and consequently also the shaft 14 - are rotationally driven by the fluid flowing through the fluid channel 18.
Die Sensorvorrichtung 12 umfasst einen permanentmagnetischen Erregermagneten 20, der an einem von dem Laufrad 16 abgewandten Ende der Welle 14 befestigt ist. Der Erregermagnet 20 ist drehfest mit der Welle 14 verbunden und ist derart ausgebildet und angeordnet, dass von dem Erregermagneten 20 bei rotierender Welle 14 ein alternierendes Erregermagnetfeld erzeugt wird. The sensor device 12 comprises a permanent magnetic exciter magnet 20 which is attached to an end of the shaft 14 facing away from the impeller 16. The exciter magnet 20 is non-rotatably connected to the shaft 14 and is designed and arranged in such a way that the exciter magnet 20 generates an alternating excitation magnetic field when the shaft 14 rotates.
Die Sensorvorrichtung 12 umfasst ferner einen Energiegenerator 22 mit einem Impulsdraht-Modul 24 und einem Energiespeicher 26. Der Energiespeicher 26 ist elektrisch mit dem Impulsdraht-Modul 24 verbunden und kann beispielsweise durch einen einfachen Kondensator gebildet sein. Auf Grund des alternierenden Erregermagnetfelds wechselt die Magnetisierungsrichtung eines Impulsdrahtes 28 (Wiegand-Draht) des Impulsdraht-Moduls 24 kontinuierlich, wobei bei jedem Wechsel der Magnetisierungsrichtung ein elektrischer Energiepuls in einer den Impulsdraht 28 radial umschließenden Spulenanordnung 30 erzeugt wird. Durch die elektrische Energie der erzeugten Energiepulse wird im vorliegenden Ausführungsbeispiel der Energiespeicher 26 geladen. Die erzeugte elektrische Energie wird also in dem Energiespeicher 26 zwischengespeichert. Der Energiespeicher 26 ist hierbei derart ausgebildet, dass seine Speicherkapazität größer ist als die elektrische Energie eines einzelnen Energiepulses. The sensor device 12 further comprises an energy generator 22 with a pulse wire module 24 and an energy store 26. The energy store 26 is electrically connected to the pulse wire module 24 and can be formed, for example, by a simple capacitor. Due to the alternating excitation magnetic field, the direction of magnetization of a pulse wire 28 (Wiegand wire) of the pulse wire module 24 changes continuously, with an electrical energy pulse being generated in a coil arrangement 30 radially surrounding the pulse wire 28 with each change in the direction of magnetization. In the present exemplary embodiment, the energy store 26 is charged by the electrical energy of the energy pulses generated. The generated electrical energy is thus temporarily stored in the energy store 26. The energy store 26 is designed such that its storage capacity is greater than the electrical energy of an individual energy pulse.
Die Sensorvorrichtung 12 umfasst im vorliegenden Ausführungsbeispiel zwei Sensorelemente 32,34, die in dem Fluidkanal 18 angeordnet sind, um eine physikalische Eigenschaft des den Fluidkanal 18 durchströmenden Fluids zu erfassen. Die zwei Sensorelemente 32,34 sind zur Energieversorgung jeweils elektrisch mit dem Energiegenerator 22 verbunden, wobei der Energiegenerator 22 den zwei Sensorelementen 32,34 jeweils sämtliche für den Betrieb benötigte elektrische Energie bereitstellt. In the present exemplary embodiment, the sensor device 12 comprises two sensor elements 32, 34 which are arranged in the fluid channel 18 in order to determine a physical property of the fluid channel 18 flowing through Capture fluids. The two sensor elements 32, 34 are each electrically connected to the energy generator 22 for energy supply, the energy generator 22 providing the two sensor elements 32, 34 each with all of the electrical energy required for operation.
Das erste Sensorelement 32 ist im vorliegenden Ausführungsbeispiel ein resistiver Temperatursensor, dessen elektrischer Widerstand sich in Abhängigkeit der Temperatur ändert. Das erste Sensorelement 32 stellt daher im vorliegenden Ausführungsbeispiel bei Anlegen einer konstanten elektrischen Spannung ein Temperatur-Sensorsignal bereit, dessen Stromstärke proportional zur erfassten Temperatur ist. Alternativ kann das erste Sensorelement 32 auch mit einem konstanten elektrischen Strom bestromt werden, wobei in diesem Fall eine elektrische Spannung des Temperatur-Sensorsignals proportional zur erfassten Temperatur ist. In the present exemplary embodiment, the first sensor element 32 is a resistive temperature sensor, the electrical resistance of which changes as a function of the temperature. In the present exemplary embodiment, the first sensor element 32 therefore provides a temperature sensor signal when a constant electrical voltage is applied, the current intensity of which is proportional to the detected temperature. Alternatively, the first sensor element 32 can also be supplied with a constant electrical current, in which case an electrical voltage of the temperature sensor signal is proportional to the detected temperature.
Das zweite Sensorelement 34 ist im vorliegenden Ausführungsbeispiel ein resistiver Drucksensor, dessen elektrischer Widerstand sich in Abhängigkeit des Umgebungsdrucks ändert. Das zweite Sensorelement 34 stellt daher im vorliegenden Ausführungsbeispiel bei Anlegen einer konstanten elektrischen Spannung ein Druck-Sensorsignal bereit, dessen Stromstärke proportional zum erfassten Umgebungsdruck ist, oder stellt bei Bestromung mit einem konstanten elektrischen Strom ein Druck- Sensorsignal bereit, dessen elektrische Spannung proportional zum erfassten Umgebungsdruck ist. In the present exemplary embodiment, the second sensor element 34 is a resistive pressure sensor, the electrical resistance of which changes as a function of the ambient pressure. The second sensor element 34 therefore provides a pressure sensor signal when a constant electrical voltage is applied, the current strength of which is proportional to the detected ambient pressure, or when energized with a constant electrical current, it provides a pressure sensor signal whose electrical voltage is proportional to the detected Ambient pressure is.
Die Sensorvorrichtung 12 umfasst ferner eine Auswerteeinheit 36, die zur Energieversorgung elektrisch mit dem Energiegenerator 22 verbunden ist, wobei der Energiegenerator 22 der Auswerteeinheit 36 sämtliche für den Betrieb benötigte elektrische Energie bereitstellt. Die Auswerteeinheit 36 ist zur Sensorsignal-Übertragung jeweils elektrisch mit den zwei Sensorelementen 32,34 verbunden. Alternativ kann die Auswerteeinheit 36 zur Sensorsignal-Übertragung auch über eine beliebige Art von Datenschnittstelle mit den Sensorelementen 32,34 verbunden sein. Die Auswerteeinheit 36 ist ausgebildet, die von den zwei Sensorelementen 32,34 empfangenen Sensorsignale auszuwerten und entsprechende Ausgabeparameter zu bestimmen und bereitzustellen. Die Auswerteeinheit 36 ist im vorliegenden Ausführungsbeispiel ferner ausgebildet, den zeitlichen Verlauf der in dem Impulsdraht-Element 24 desThe sensor device 12 further comprises an evaluation unit 36 which is electrically connected to the energy generator 22 for the energy supply, the energy generator 22 providing the evaluation unit 36 with all the electrical energy required for operation. The evaluation unit 36 is electrically connected to the two for sensor signal transmission Sensor elements 32,34 connected. Alternatively, the evaluation unit 36 for the sensor signal transmission can also be connected to the sensor elements 32, 34 via any type of data interface. The evaluation unit 36 is designed to evaluate the sensor signals received from the two sensor elements 32, 34 and to determine and provide corresponding output parameters. The evaluation unit 36 is also designed in the present exemplary embodiment, the time course of the in the pulse wire element 24 of the
Energiegenerators 22 erzeugten Energiepulse auszuwerten und dadurch eine aktuelle Drehzahl und/oder einen aktuellen Drehwinkel der Welle 14 zu bestimmen und bereitzustellen. Energy generator 22 to evaluate generated energy pulses and thereby to determine and provide a current speed and / or a current angle of rotation of the shaft 14.
Die Sensorvorrichtung 12 umfasst ferner eine Funk-Datenschnittstelle 38, die elektrisch mit dem Energiegenerator 22 verbunden ist. Die Funk- Datenschnittstelle 38 ist über eine Datenverbindung mit derThe sensor device 12 further includes a radio data interface 38 which is electrically connected to the energy generator 22. The radio data interface 38 is via a data connection with the
Auswerteeinheit 36 verbunden, wobei die Datenverbindung vorzugsweise als einfache elektrische Verbindung ausgeführt ist. Die Funk- Datenschnittstelle ermöglicht beispielsweise eine drahtlose Übertragung der von der Auswerteeinheit 36 bestimmten Ausgabeparameter an ein nicht gezeigtes externes EDV-System mit einer korrespondierenden Empfangsschnittstelle. Die Funk-Datenschnittstelle 38 arbeitet im vorliegenden Ausführungsbeispiel nach dem Prinzip der modulierten Rückstreuung, beispielweise nach der bekannten „LoRa Backscatter"- Spezifikation. H ierbei wird die für den Betrieb der Funk-Datenschnittstelle 38 benötigte elektrische Energie - idealerweise vollständig - aus empfangener elektromagnetischer Strahlung erzeugt. Für den Betrieb der Funk-Datenschnittstelle 38 muss daher im Idealfall gar keine elektrische Energie von dem Energiegenerator 22 an die Funk-Datenschnittstelle 38 bereitgestellt werden, vielmehr kann die Funk-Datenschnittstelle 38 sogar elektrische Energie an den Energiegenerator 22 bereitstellen, falls die Funk-Datenschnittstelle 38 mehr elektrische Energie erzeugt, als für ihren Betrieb benötigt wird. Falls die in der Funk-Datenschnittstelle 38 erzeugte elektrische Energie zeitweise nicht für den Betrieb der der Funk- Datenschnittstelle 38 ausreichen sollte, dann kann die fehlende elektrische Energie jedoch auch von dem Energiegenerator 22 an die Funk- Datenschnittstelle 38 bereitgestellt werden. Evaluation unit 36 connected, the data connection preferably being designed as a simple electrical connection. The radio data interface enables, for example, a wireless transmission of the output parameters determined by the evaluation unit 36 to an external EDP system (not shown) with a corresponding receiving interface. The radio data interface 38 works in the present embodiment according to the principle of modulated backscattering, for example according to the known "LoRa Backscatter" specification. Here, the electrical energy required to operate the radio data interface 38 is - ideally completely - from received electromagnetic radiation For the operation of the radio data interface 38, therefore, in the ideal case, no electrical energy at all has to be provided from the energy generator 22 to the radio data interface 38, rather the radio data interface 38 can even provide electrical energy to the energy generator 22 if the radio Data interface 38 generates more electrical energy than for theirs Operation is required. If the electrical energy generated in the radio data interface 38 is temporarily insufficient for the operation of the radio data interface 38, the missing electrical energy can, however, also be provided by the energy generator 22 to the radio data interface 38.
Die Sensorvorrichtung 12 umfasst im vorliegenden Ausführungsbeispiel ferner einen Datenspeicher 40, der zur Energieversorgung elektrisch mit dem Energiegenerator 22 verbunden ist, wobei der Energiegenerator 22 dem Datenspeicher 40 sämtliche für den Betrieb benötigte elektrische Energie bereitstellt. Der Datenspeicher 40 ist vorzugsweise als nicht flüchtiger ferroelektrischer Datenspeicher ausgebildet. Der Datenspeicher 40 ist über eine Datenverbindung - vorzugsweise über eine einfache elektrische Verbindung - mit der Auswerteeinheit 36 verbunden und ermöglicht beispielsweise ein Abspeichern der von der Auswerteeinheit 36 bestimmten Ausgabeparameter. In the present exemplary embodiment, the sensor device 12 furthermore comprises a data memory 40 which is electrically connected to the energy generator 22 for supplying energy, the energy generator 22 providing the data memory 40 with all of the electrical energy required for operation. The data memory 40 is preferably designed as a non-volatile ferroelectric data memory. The data memory 40 is connected to the evaluation unit 36 via a data connection - preferably via a simple electrical connection - and enables, for example, the storage of the output parameters determined by the evaluation unit 36.
Bezugszeichenliste List of reference symbols
10 Fluiddurchfluss-Messanordnung 12 Sensorvorrichtung 10 fluid flow measuring arrangement 12 sensor device
14 Welle 14 wave
16 Laufrad 16 impeller
18 Fluidkanal 18 fluid channel
20 Erregermagneten 20 excitation magnets
22 Energiegenerator 22 Energy generator
24 Impulsdraht-Modul 24 pulse wire module
26 Energiespeicher 26 energy storage
28 Impulsdrahtes 28 pulse wire
30 Spulenanordnung 30 coil arrangement
32 erstes Sensorelement 32 first sensor element
34 zweites Sensorelement 34 second sensor element
36 Auswerteeinheit 36 evaluation unit
38 Funk-Datenschnittstelle 38 Radio data interface
40 Datenspeicher 40 data memory

Claims

P A T E N T A N S P R Ü C H E 1. Sensorvorrichtung (12) mit P A T E N T A N S P R Ü C H E 1. Sensor device (12) with
- einem Erregermagneten (20) zur Erzeugung eines alternierenden Erregermagnetfelds, - an excitation magnet (20) for generating an alternating excitation magnetic field,
- einem Energiegenerator (22) mit einem Impulsdraht-Modul (24), in dem durch das alternierende Erregermagnetfeld elektrische Energiepulse erzeugbar sind, - An energy generator (22) with a pulse wire module (24), in which electrical energy pulses can be generated by the alternating excitation magnetic field,
- mindestens einem Sensorelement (32,34) zur Erfassung einer physikalischen Größe und zur Bereitstellung eines Sensorsignals, - At least one sensor element (32, 34) for detecting a physical variable and for providing a sensor signal,
- einer Auswerteeinheit (36) zur Auswertung des mindestens einen Sensorsignals, und - An evaluation unit (36) for evaluating the at least one sensor signal, and
- einer Funk-Datenschnittstelle (38), die über eine Datenverbindung mit der Auswerteeinheit verbunden ist, - a radio data interface (38) which is connected to the evaluation unit via a data link,
wobei das mindestens eine Sensorelement (32,34) und die Auswerteeinheit (36) jeweils elektrisch mit dem Energiegenerator (22) verbunden sind und durch diesen mit elektrischer Energie versorgbar sind. wherein the at least one sensor element (32, 34) and the evaluation unit (36) are each electrically connected to the energy generator (22) and can be supplied with electrical energy by this.
2. Sensorvorrichtung (12) nach Anspruch 1, wobei der Energiegenerator (22) einen Energiespeicher (26) aufweist, der elektrisch mit dem Impulsdraht-Modul (24) verbunden ist. 2. Sensor device (12) according to claim 1, wherein the energy generator (22) has an energy store (26) which is electrically connected to the pulse wire module (24).
3. Sensorvorrichtung (12) nach einem der vorhergehenden Ansprüche, wobei mindestens ein resistives Sensorelement (32,34) vorgesehen ist, dessen elektrischer Widerstand sich in Abhängigkeit der zu erfassenden physikalischen Größe verändert. 3. Sensor device (12) according to one of the preceding claims, wherein at least one resistive sensor element (32, 34) is provided, the electrical resistance of which changes as a function of the physical variable to be detected.
4. Sensorvorrichtung (12) nach einem der vorhergehenden Ansprüche, wobei mehrere Sensorelement (32,34) vorgesehen sind, wobei jedes Sensorelement (32,34) zur Erfassung einer unterschiedlichen physikalischen Größe ausgebildet ist und durch den Energiegenerator (22) mit elektrischer Energie versorgbar ist. 4. Sensor device (12) according to one of the preceding claims, wherein a plurality of sensor elements (32,34) are provided, wherein each sensor element (32,34) is designed to detect a different physical variable and can be supplied with electrical energy by the energy generator (22) is.
5. Sensorvorrichtung (12) nach einem der vorhergehenden Ansprüche, wobei die Funk-Datenschnittstelle (38) nach dem Prinzip der modulierten Rückstreuung arbeitet. 5. Sensor device (12) according to one of the preceding claims, wherein the radio data interface (38) operates on the principle of modulated backscatter.
6. Sensorvorrichtung (12) nach einem der vorhergehenden Ansprüche, wobei ein Datenspeicher (40) vorgesehen ist, der über eine Datenverbindung mit der Auswerteeinheit (36) verbunden ist. 6. Sensor device (12) according to one of the preceding claims, wherein a data memory (40) is provided which is connected to the evaluation unit (36) via a data connection.
7. Sensorvorrichtung (12) nach einem der vorhergehenden Ansprüche, wobei die Funk-Datenschnittstelle (38) elektrisch mit dem Energiegenerator (22) verbunden ist, derart, dass eine Übertragung von elektrischer Energie zwischen der Funk-Datenschnittstelle (38) und dem Energiegenerator (22) möglich ist. 7. Sensor device (12) according to one of the preceding claims, wherein the radio data interface (38) is electrically connected to the energy generator (22) in such a way that a transmission of electrical energy between the radio data interface (38) and the energy generator ( 22) is possible.
8. Sensorvorrichtung (12) nach einem der vorhergehenden Ansprüche, wobei der Erregermanget (20) an einer drehbaren Welle (14) angeordnet ist, und 8. Sensor device (12) according to one of the preceding claims, wherein the exciter magnet (20) is arranged on a rotatable shaft (14), and
wobei die Auswerteeinheit (36) ausgebildet ist, durch Auswertung des zeitlichen Verlaufs der Energiepulse des Impulsdraht-Elements (24) eine Drehbewegung der Welle (14) zu erfassen. wherein the evaluation unit (36) is designed to detect a rotary movement of the shaft (14) by evaluating the time profile of the energy pulses of the pulse wire element (24).
9. Fluiddurchfluss-Messandordnung (10) mit 9. Fluid flow measuring arrangement (10) with
- einer Welle (14), deren aktuelle Drehzahl proportional zu dem aktuellen Fluiddurchfluss ist, und - A shaft (14), the current speed of which is proportional to the current fluid flow rate, and
- einer Sensorvorrichtung (12) mit • einem an der Welle (14) befestigten Erregermagneten (20) zur Erzeugung eines alternierenden Erregermagnetfelds, - A sensor device (12) with • an excitation magnet (20) attached to the shaft (14) for generating an alternating excitation magnetic field,
• einem Energiegenerator (22) mit einem Impulsdraht-Modul (24), in dem durch das alternierende Erregermagnetfeld elektrische Energiepulse erzeugbar sind, • an energy generator (22) with a pulse wire module (24), in which electrical energy pulses can be generated by the alternating excitation magnetic field,
• mindestens einem Sensorelement (32,34) zur Erfassung einer physikalischen Eigenschaft eines die Fluiddurchfluss- Messandordnung durchströmenden Fluids und zur Bereitstellung eines Sensorsignals, • at least one sensor element (32, 34) for detecting a physical property of a fluid flowing through the fluid flow measuring arrangement and for providing a sensor signal,
· einer Auswerteeinheit (36) zur Auswertung des mindestens einen Sensorsignals, wobei die Auswerteeinheit (36) ausgebildet ist, durch Auswertung des zeitlichen Verlaufs der Energiepulse des Impulsdraht-Elements (24) eine Drehbewegung der Welle (14) zu erfassen, und An evaluation unit (36) for evaluating the at least one sensor signal, the evaluation unit (36) being designed to detect a rotary movement of the shaft (14) by evaluating the time profile of the energy pulses of the pulse wire element (24), and
· einer Funk-Datenschnittstelle (38), die über eine · A radio data interface (38), which has a
Datenverbindung mit der Auswerteeinheit (36) verbunden ist, wobei das mindestens eine Sensorelement (32,34), die Auswerteeinheit (36) und die Funk-Datenschnittstelle (38) jeweils elektrisch mit dem Energiegenerator (22) verbunden sind und durch diesen mit elektrischer Energie versorgbar sind. Data connection is connected to the evaluation unit (36), the at least one sensor element (32, 34), the evaluation unit (36) and the radio data interface (38) each being electrically connected to the energy generator (22) and through this with electrical energy can be supplied.
EP20733727.0A 2019-06-19 2020-06-15 Sensor device and fluid flow-rate measuring assembly having a sensor device of this type Pending EP3987251A1 (en)

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DE102019116636.5A DE102019116636A1 (en) 2019-06-19 2019-06-19 Sensor device and fluid flow measuring arrangement with such a sensor device
PCT/EP2020/066513 WO2020254258A1 (en) 2019-06-19 2020-06-15 Sensor device and fluid flow-rate measuring assembly having a sensor device of this type

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US (1) US11913818B2 (en)
EP (1) EP3987251A1 (en)
JP (2) JP2022537101A (en)
CN (1) CN217585898U (en)
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DE102007039051B8 (en) 2007-08-17 2023-09-28 Avago Technologies International Sales Pte. Limited Absolute fine-resolution segment or revolution counter
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DE102008064677A1 (en) * 2008-08-23 2010-12-02 Amphiro Ag Method and arrangement for determining the consumption of resources
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DE102011011871A1 (en) 2011-01-06 2012-07-12 Walter Mehnert Method and device for determining the mass of a fluid flowing through a flow meter in a consumption time interval
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DE102011002179B4 (en) 2011-04-19 2023-10-12 Avago Technologies International Sales Pte. Limited Method and arrangement for synchronizing a segment counter with a fine position sensor
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JP2022537101A (en) 2022-08-24
CN217585898U (en) 2022-10-14
US11913818B2 (en) 2024-02-27
WO2020254258A1 (en) 2020-12-24
DE212020000655U1 (en) 2022-01-27
DE102019116636A1 (en) 2020-12-24
JP3242779U (en) 2023-07-11

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