EP4341648A1 - Remote sensoranordnung - Google Patents
Remote sensoranordnungInfo
- Publication number
- EP4341648A1 EP4341648A1 EP22728801.6A EP22728801A EP4341648A1 EP 4341648 A1 EP4341648 A1 EP 4341648A1 EP 22728801 A EP22728801 A EP 22728801A EP 4341648 A1 EP4341648 A1 EP 4341648A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- sensor
- magnetic field
- magnetic
- sensor arrangement
- medium
- 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
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
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/72—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables
- G01N27/82—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws
- G01N27/90—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws using eddy currents
- G01N27/9006—Details, e.g. in the structure or functioning of sensors
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
- G01K7/36—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using magnetic elements, e.g. magnets, coils
- G01K7/38—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using magnetic elements, e.g. magnets, coils the variations of temperature influencing the magnetic permeability
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L9/00—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means
- G01L9/16—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means by making use of variations in the magnetic properties of material resulting from the application of stress
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/02—Measuring direction or magnitude of magnetic fields or magnetic flux
- G01R33/06—Measuring direction or magnitude of magnetic fields or magnetic flux using galvano-magnetic devices
- G01R33/063—Magneto-impedance sensors; Nanocristallin sensors
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/02—Measuring direction or magnitude of magnetic fields or magnetic flux
- G01R33/06—Measuring direction or magnitude of magnetic fields or magnetic flux using galvano-magnetic devices
- G01R33/07—Hall effect devices
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/02—Measuring direction or magnitude of magnetic fields or magnetic flux
- G01R33/06—Measuring direction or magnitude of magnetic fields or magnetic flux using galvano-magnetic devices
- G01R33/09—Magnetoresistive devices
- G01R33/093—Magnetoresistive devices using multilayer structures, e.g. giant magnetoresistance sensors
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/12—Measuring magnetic properties of articles or specimens of solids or fluids
- G01R33/1223—Measuring permeability, i.e. permeameters
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/12—Measuring magnetic properties of articles or specimens of solids or fluids
- G01R33/16—Measuring susceptibility
Definitions
- field devices In industrial process automation, a wide variety of field devices are used for monitoring and/or determining various process variables and/or parameters of a medium in a wide variety of configurations.
- all measuring devices are referred to as field devices that are used close to the process and that supply or process process-relevant information, including remote I/Os, wireless adapters or general electronic components that are arranged at the field level.
- a large number of such field devices are manufactured and sold by companies in the Endress + Hauser Group.
- Non-invasive measuring devices in which the sensor unit is brought into direct contact with the respective medium
- non-invasive measuring devices in which the process variable of the medium outside the container in which the medium is located
- Non-invasive measuring devices basically offer the advantage that no intervention in the process is necessary.
- such measuring devices have only been available to a limited extent so far, since many different factors have to be taken into account with regard to the achievable measuring accuracy and with regard to possible interference, for example due to the container wall or the environment. Nevertheless, a general aim is to use the measuring device used to intervene as little as possible in the respective process.
- Another goal is the ongoing miniaturization while at the same time increasing the performance and expanding the area of application of the respective sensors.
- such sensors are desirable that enable a comprehensive characterization of the respective medium with regard to many different process variables and/or parameters of the medium.
- magnetic and/or electrical properties of the medium precise devices for detecting changes in magnetic and/or electrical fields and, depending on the sensor type, possibly also in gravitational fields are required in this context.
- the present invention is based on the object of providing a sensor for characterizing media, in particular in industrial Process automation, by means of which high-precision measurements are possible with minimal intervention in the process.
- a sensor arrangement for determining and/or monitoring a process variable and/or characteristic variable of a medium in a container comprising a sensor device, a magnetic field device and a detection device.
- the magnetic field device is used to generate a magnetic field in such a way that the magnetic field penetrates at least the sensor device, the detection device and partially the medium.
- the sensor device is in turn designed and/or arranged in such a way that at least one magnetic property of a component of the sensor device depends on the process variable and/or parameter and the magnetic field of the magnetic field device can be influenced by means of the sensor device depending on the process variable and/or parameter.
- the detection device is designed to detect a variable related to the magnetic field, in particular the magnetic flux density, the magnetic susceptibility or the magnetic permeability, and to determine the process variable and/or parameter based on the variable related to the magnetic field and/or or to monitor.
- the sensor device is arranged within an inner volume of the container and the detection device is arranged outside of the container.
- the sensor arrangement according to the invention is thus designed in such a way that there is minimal intervention in the process.
- the sensor device which is arranged in an inner volume of the container and is therefore in contact with the medium.
- the detection device is arranged outside the container.
- the magnetic field device can also be arranged outside the container.
- an opening in a wall of the container is not required.
- the sensor device can have either a single component or multiple components for which at least one magnetic property is dependent on the process variable and/or parameter. Different can
- Components can be designed the same or different, in particular be made of the same or different materials. Combinations of different components are particularly advantageous with regard to the suppression of interfering external magnetic fields or with regard to the desired extension of the area of application of the respective sensor arrangement.
- the sensor device can also be attached to an inner wall of the container, for example a container or a pipeline. Both a detachable and a non-detachable, in particular cohesive, attachment can be considered, which attachment can be produced in particular using suitable attachment means. However, the sensor device can also be integrated into the
- the sensor device floats in the medium. It is also conceivable to integrate the sensor device into the wall of the container, in particular in such a way that the sensor device ends flush with the wall of the container.
- the detection device can be attached to an outer wall of the container or arranged at a distance from it.
- the detection device can also be part of a separate unit which can be brought into the vicinity of the container in each case in order to detect the process variable and/or characteristic variable of the medium.
- the container is, for example, a container or a pipeline. It can also be a disposable container. Disposable process solutions or single-use technologies are being used to an increasing extent in many industrial processes, particularly in pharmaceutical, biological, biochemical or biotechnological processes. Corresponding process systems include pipelines or reactors that are designed as single-use containers (disposable bioreactor or single-use bioreactor or single-use component). Such disposable containers can be, for example, flexible containers, such as bags, hoses or fermenters. Some disposable containers, e.g. B. bioreactors or fermenters, have inlets and outlets, which can be designed as hoses, or in which solid pipe sections can be used as inlets and outlets.
- An advantage of the single-use technology is that the disposable containers are disposed of after the end of a process. In this way, complex cleaning and sterilization processes are avoided. In particular, the use of disposable containers prevents the risk of cross-contamination and thus increases process reliability.
- sensors in the field of single-use technology have to meet special requirements, for example, it is important to avoid feedthroughs to the environment, especially leaks. It is also customary to place the sensors used in the disposable container (invasive sensors), which makes coupling to the medium particularly easy to implement, but sensors attached to the container from the outside (non-invasive sensors) have the advantage that no Connection to the process is necessary and the sensors may be reusable and the sterility requirements can be fulfilled much more easily.
- the senor device With the present solution, only the sensor device has to be introduced into the container.
- the other components can be arranged outside of the container and are therefore advantageously reusable.
- a connection from the interior volume of the container to the environment is not necessary, so that no leaks in the container can occur.
- the magnetic field device comprises at least one coil and/or one permanent magnet.
- a coil core in particular made of a material with high permeability, can also be present.
- a component of the sensor device comprises a ferromagnetic material.
- the ferromagnetic material has a phase transition from a paramagnetic state to a ferromagnetic state at a predeterminable phase transition temperature.
- the ferromagnetic state is characterized by a tendency for the magnetic moments of the atoms of the material to be aligned in parallel.
- the ferromagnetic material is, for example, a material such as cobalt, iron or nickel or one of their alloys. In particular, however, it can also be a nanocrystalline or amorphous material.
- An alternative configuration of the sensor arrangement includes that a component of the sensor device comprises a magnetostrictive material.
- a magnetostrictive material is characterized by a deformation of the material as a result of an applied magnetic field.
- Joule magnetostriction which is understood to mean a change in length as a result of a change in magnetization
- Villary effect which is also referred to as the inverse magnetostrictive effect, in which a change in mechanical stress leads to a change in magnetization
- the Delta-E effect which is a change in
- the magnetostrictive material is, for example, nickel or an iron alloy, in particular an alloy of cobalt and iron, an alloy of gallium and iron or galfenol, or an alloy of terbium, dysprosium and iron or terfenol.
- a material with the highest possible permeability is preferably selected in order to maximize penetration of the sensor device by the magnetic field.
- Both fixed magnetostrictive components and components made of a porous material can be used. In the case of a porous material, a mechanical deformation of the porous material can also be used to record the respective process variable and/or parameter.
- the component of the sensor device comprises a ferrite material or a permanent magnet, the magnetic field of which depends on the process variable, for example the temperature of the medium.
- the sensor device it is advantageous if it comprises a carrier or a membrane on which the component of the sensor device, in particular the ferromagnetic or magnetostrictive material, for example in
- Form of a layer or an elongate element is applied, for example by means of a material connection.
- the component can be joined to the carrier or the membrane.
- the support or the membrane can be used to attach it to an inner wall of the container.
- the carrier or the membrane is preferably made of a non-magnetic material, for example stainless steel, brass or aluminium. It is also advantageous if the component, which for this configuration preferably comprises a magnetostrictive material, is applied to the carrier or the membrane in such a way that there is a predeterminable, basic mechanical stress between the component and the carrier or the membrane. In this way, a sensor characteristic or the sensor behavior can be linearized.
- the component of the sensor device comprises a magnetostrictive material which is applied to the carrier or the membrane
- the carrier or the membrane and the magnetostrictive material have different thermal expansion coefficients.
- This configuration is particularly suitable for detecting the temperature of the medium.
- the temperature of the medium can therefore be determined using the Villary effect on the basis of the magnetic field.
- a sensor device with a carrier or a membrane is also suitable for determining other process variables and/or characteristic variables of the medium, such as the pressure of the medium in the container.
- a further refinement of the sensor device includes the component, the at least one magnetic property of which is dependent on the process variable and/or characteristic variable, being arranged in a housing.
- the component can be a medium-tight encapsulation, in particular made of a non-magnetic material, z. B. stainless steel act.
- compatibility with the respective medium can be achieved.
- Such an embodiment is also advantageous in the case of a sensor device floating in the medium.
- the detection device comprises a magnetic field sensor.
- the magnetic field sensor serves to detect the magnetic field outside the container, which is influenced by the sensor device inside the container depending on the process variable and/or characteristic variable of the medium, or to detect the variable related to the magnetic field.
- the detection device can also have a computing unit which is designed to determine the process variable and/or characteristic variable of the medium based on the variable related to the magnetic field.
- the magnetic field sensor is a Hall sensor or a GMR sensor.
- the magnetic field sensor is a quantum sensor.
- Quantum sensors in which a wide variety of quantum effects are used to determine various physical and/or chemical measured variables, relate to various recent developments in the field of sensor technology. In the context of industrial process automation, such approaches are of particular interest with regard to increasing efforts towards miniaturization while at the same time increasing the performance, in particular the measuring accuracy, of the respective sensors.
- Quantum sensors are based on the fact that certain quantum states of individual atoms or ensembles of atoms can be very precisely controlled and read out. In this way, for example, precise and low-interference measurements of electric and / or magnetic fields and gravitational fields with resolutions in nanometer range possible.
- various spin-based sensor arrangements have become known, for which atomic transitions in crystal bodies are used to detect changes in movements, electric and/or magnetic fields or gravitational fields.
- different systems based on quantum-optical effects have also become known, such as, for example, quantum gravimeters, NMR gyroscopes or optically pumped magnetometers, the latter in particular being based on gas cells, among other things.
- An embodiment of the magnetic field sensor in the form of a quantum sensor thus includes the magnetic field sensor being a gas cell.
- Quantum sensors in the form of a gas cell are used to optically detect atomic transitions and spin states, for example to determine magnetic and/or electrical properties.
- a gas cell typically includes a gaseous alkali metal and a buffer gas. Magnetic properties of a medium surrounding the gas cell can be determined using Rydberg states generated in the gas cell.
- Gas cells are often used in quantum-based standards that record physical quantities with high precision, for example in frequency standards or atomic clocks, as known from EP 0 550 240 B1.
- US Pat. No. 10,184,796 B2 describes a chip-sized atomic gyroscope in which a gas cell is used to determine the magnetic field.
- An optically pumped magnetometer based on a gas cell is known from US Pat. No. 9,329,152 B2.
- JP 4066804 A2 describes the use of gas cells to determine absolute path lengths.
- gas cells are also called
- the magnetic field sensor in the form of a quantum sensor means that the magnetic field sensor is a sensor comprising at least one crystal body with at least one defect.
- spin-based quantum sensors atomic transitions in different crystal bodies are used to detect even small changes in movements, electric and/or magnetic fields or gravitational fields.
- diamond with at least one silicon or nitrogen defect, silicon carbide with at least one silicon defect or hexagonal boron nitride with at least one defect color center is used as the crystal body.
- the crystal bodies can have one or more defects. In the case of several defects, a linear arrangement of the defects is preferred.
- DE 3742878 A1 discloses an optical magnetic field sensor in which a crystal is used as a magnetically sensitive optical component.
- DE 10 2017205 099 A1 discloses a sensor device with a crystal body having at least one defect, a light source, a high-frequency device for applying a high-frequency signal to the crystal body, and a detection unit for detecting a magnetic-field-dependent fluorescence signal. Further sensors using defects in crystal bodies are described in DE 102017 205 265 A1, DE 10 2014 219 550 A1, DE 10 2018 214 617 A1, or DE 102016 210 259 A1.
- a sensor device which uses a fluorescence signal from a crystal body with at least one defect to determine a process variable of a medium and which also uses a variable that is characteristic of the magnetic field to monitor the status of the respective medium
- a limit level sensor is also known from the previously unpublished German patent application with the file number 10 2021 100223.0, in which a statement about a limit level is determined on the basis of the fluorescence.
- the detection device with a quantum sensor with a crystal body with at least one defect, it is advantageous if the detection device also has an excitation unit for optically exciting the defect, a device for detecting a magnetic field-dependent fluorescence signal from the crystal body and an evaluation unit for determining the with the magnetic field related size based on the fluorescence signal.
- the excitation unit for the optical excitation of the defect can be, for example, a laser or a light-emitting diode (LED).
- the detector in turn, can be a photodetector or a CMOS sensor, for example.
- the detection unit can have additional optical elements, such as various filters, lenses or mirrors.
- the excitation unit and the detector can be arranged on the one hand in the area of the crystal body, or they can be spatially separated from the crystal body. In the second case, optical fibers can be present for conducting the excitation light and fluorescence signal.
- the detection device can have a unit for exciting high-frequency or microwave radiation. This allows electrons to be excited to higher energy levels.
- the evaluation unit for determining the variable related to the magnetic field using the fluorescence signal can include a lock-in amplifier and a modulator, by means of which modulator the magnetic field can be modulated, for example. This allows an evaluation of the fluorescence signal based on the frequency and, associated therewith, an evaluation that can be implemented in a simple manner, in particular with a reduced influence of interference signals.
- the process variable is the temperature of the medium.
- the temperature it is advantageous that only the sensor device is arranged inside the container. The sensor device thus always has good thermal contact with the medium.
- no openings or windows are required within the container to record a temperature-dependent measurement signal.
- the temperature is recorded without contact using the magnetic field influenced by the sensor device.
- no heat conduction or heat flows from the environment need be taken into account for such a thermometer when determining the temperature.
- the component of the sensor device comprises a ferromagnetic material.
- the phase transition from the paramagnetic to the ferromagnetic state or vice versa does not occur abruptly at the phase transition temperature, but rather continuously within a phase transition temperature interval around the Curie temperature that is characteristic of the respective material.
- a highly precise temperature determination can be made since a change in temperature results in a comparatively large change in magnetization, which in this case is taken as the quantity related to the magnetic field.
- the component of the sensor device comprises a magnetostrictive material
- an embodiment is advantageous in which different thermal expansion coefficients of the magnetostrictive material and an element that is firmly connected to the magnetostrictive material are used, such as when using a carrier or a membrane.
- the quantity related to the magnetic field is the magnetic flux density, with the temperature being determined using the gyromagnetic ratio and the magnetic flux density.
- the gyromagnetic ratio is defined as the proportionality factor between the spin of a particle and the magnetic moment and is not itself affected by temperature. Rather, the product of the gyromagnetic ratio and the magnetic flux density is influenced.
- the process variable is the pressure of the medium.
- a change in the pressure inside the container results, for example, in mechanical stress and/or deformation in the magnetostrictive material that is in contact with the medium, and an associated change in the magnetization or the magnetic field , which can be used to determine the pressure.
- the Villary effect is used to record the pressure.
- an embodiment of the sensor device in the form of a ceramic pressure measuring cell known from the prior art is also conceivable, on which a magnetostrictive material, for example in the form of a thin layer , is upset.
- a change in pressure leads to a deflection of a membrane of the ceramic pressure measuring cell and, as a result, to tension in the magnetostrictive material as a result of the deformation.
- a further embodiment of the sensor arrangement includes that the sensor arrangement, in particular the detection device, is designed to determine an influence of a wall of the container, in particular based on the thickness of the wall and/or based on the material from which the container is made, on the magnetic field record, and that the detection device is designed to take into account the influence of the wall of the container when determining and/or monitoring the process variable and/or parameter.
- the sensor arrangement in particular the detection device, is designed to determine an influence of a wall of the container, in particular based on the thickness of the wall and/or based on the material from which the container is made, on the magnetic field record, and that the detection device is designed to take into account the influence of the wall of the container when determining and/or monitoring the process variable and/or parameter.
- the present invention allows a process variable and/or characteristic variable of a medium to be detected through a wall of a container in which the medium is located. This does not require any openings or windows within the container.
- the invention is based on the finding that a magnetic field, which is influenced by the respective process variable and/or characteristic variable of the medium using a suitable sensor arrangement, can be detected from outside the container, i.e. through the wall of the container.
- the invention accordingly provides a high-performance, simple and robust structure for a sensor, which is particularly advantageously also low-maintenance.
- the intervention in the process required for installing the same can advantageously be minimized, since only the sensor device has to be introduced into an inner volume of the container.
- use of the sensor arrangement in a potentially explosive atmosphere is also readily possible and in particular without the need for auxiliary energy.
- Fig. 4 a sensor arrangement according to the invention for determining the pressure of the medium
- Fig. 5 A simplified energy scheme for a negatively charged NV center in diamond
- FIG. 6 shows a schematic arrangement of a detection device for a quantum sensor with a crystal body with at least one defect.
- the same elements are provided with the same reference symbols.
- Fig. 1 shows a first, schematically illustrated embodiment for a sensor arrangement 1 according to the invention for determining and/or monitoring a process variable and/or characteristic variable of a medium M in a container 2.
- the sensor device 3 is within the inner volume V of the container 2 (here in the form of a Container) arranged and attached to the inner wall of the container 2 Wdes.
- the sensor device 3 includes a component 5, for which at least one magnetic property depends on the process variable and/or characteristic variable of the medium M, which is designed in the present case in the form of a thin, elongated element.
- this component 5 can be an element made of a ferromagnetic or magnetostrictive material.
- the component 5 is arranged on a carrier or a membrane 4 .
- this is not absolutely necessary, which is why the carrier or the membrane is shown in dashed lines.
- the sensor arrangement 1 also includes a magnetic field device 6 for generating a magnetic field B in the area of the sensor device 3, at least part of the medium M and in the area of the detection device 7.
- the magnetic field B therefore penetrates the detection device 7, the sensor device 3 and the medium.
- the magnetic field B is also influenced by the sensor device 3 or by the component 5, so that based on the detected or detected by the detection device 7 magnetic field B, or based on a detected or detected with the magnetic field B related variable, the Process variable and / or parameter of the medium M can be determined and / or monitored.
- the detection device 7 and, for the example shown, also the magnetic field device 6 are arranged outside the container 2 .
- FIG. 1 A further configuration for a sensor arrangement 1 according to the invention is shown in FIG.
- the sensor device 3 arranged in a housing G, which is configured spherically here, floats in the medium.
- the magnetic field is dependent on location, which can be taken into account in this way in the case of a floating sensor device.
- the sensor arrangement 1, in particular the detection device 7, is advantageously designed to determine an influence of the wall W of the container on the detected magnetic field B, in particular based on a thickness of the wall and/or based on the material from which the container 2 is made and to be taken into account when determining and/or monitoring the process variable and/or parameter.
- suitable reference curves or calculation rules for example for different materials of the containers 2 , can be stored in the detection device 7 , in particular in a computing unit of the detection device 7 .
- FIG. 3 shows a sensor arrangement 1 according to the invention, which serves to detect the temperature T of the medium in the example shown here.
- the sensor device 3 comprises a magnetostrictive material 5 applied to a carrier 4a, which is applied in the form of a layer to the carrier 4a and attached to the wall W of the container from the inside.
- the carrier 4a and the magnetostrictive material 5 have different thermal expansion coefficients, so that a temperature change in the medium leads to mechanical stress in the sensor device 3, which in turn results in a changed magnetization of the magnetostrictive material 5 and, as a result, a change in the magnetic field B
- the magnetic field device 6 includes here, for example, a permanent magnet 8 and a coil 9 with a core 9a, which consists of two L-shaped elements.
- the detection device 7 which comprises a magnetic field sensor 10 and a computing unit 11 , is arranged in a gap between the two elements of the core 9a.
- the magnetic field sensor 10 can be a Hall sensor, a GMR sensor or a quantum sensor, for example.
- the temperature T of the medium can be determined, for example, in the computing unit using the gyromagnetic ratio as the variable related to the magnetic field B.
- a further possibility for temperature determination with a sensor arrangement according to the invention arises when using a ferromagnetic material as component 5 of the sensor device 3, in which at least one magnetic property depends on the process variable and/or characteristic variable of the medium M, i.e. the temperature T.
- the sensor arrangement 1 can be constructed analogously to the configuration shown in FIG. 3 .
- the sensor arrangement according to the invention can also be used to determine other process variables and/or characteristic variables of the medium M, as illustrated by way of example for the case of a determination of the pressure p of the medium in FIG. 4 .
- the Magnetic field device 6 and the detection unit 7 are designed as for the variant shown in FIG.
- Particularly advantageous configurations of the present sensor arrangement relate to detection devices 7 in which magnetic field sensors 8 in the form of a quantum sensor 12 are used. These are characterized by great compactness with very high performance and precision.
- the use of magnetic field sensors 8 in the form of quantum sensors 12 is explained below by way of example using a quantum sensor 12 in the form of a sensor 14 comprising at least one crystal body 15 with at least one defect.
- NV center a nitrogen vacancy center
- the negatively charged NV centers are important for the excitation and evaluation of fluorescence signals.
- An applied magnetic field with a magnetic field density B leads to a splitting (Zeeman splitting) of the magnetic sub-states, so that the ground state consists of three energetically separated sub-states, each of which can be excited.
- the intensity of the fluorescence signal LF depends on the respective magnetic substate from which the excitation was made, so that based on the distance of the Fluorescence minima, for example, the magnetic field density B can be calculated using the Zeeman formula.
- exemplary detection device 7 for use with such a quantum sensor 10 in the form of a sensor 14 with a crystal body 15 with a defect is finally shown in Fig. 6.
- the detection device 7 has an excitation unit 16 for generating the excitation light LA , and a device 17 for detecting the magnetic-field-dependent fluorescence signal LF from the crystal body 15.
- the detection device 7 has an evaluation unit 18 for determining the variable related to the magnetic field B using the fluorescence signal LF.
- Evaluation unit 18 in addition to a lock-in amplifier 19, a control/processing unit 20 and a modulator 21 for modulating the magnetic field of the magnetic field device.
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Nanotechnology (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
- Measuring Magnetic Variables (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102021113199.5A DE102021113199A1 (de) | 2021-05-20 | 2021-05-20 | Remote Sensoranordnung |
| PCT/EP2022/062718 WO2022243120A1 (de) | 2021-05-20 | 2022-05-11 | Remote sensoranordnung |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4341648A1 true EP4341648A1 (de) | 2024-03-27 |
Family
ID=81984810
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP22728801.6A Pending EP4341648A1 (de) | 2021-05-20 | 2022-05-11 | Remote sensoranordnung |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US20240241082A1 (de) |
| EP (1) | EP4341648A1 (de) |
| CN (1) | CN117337377A (de) |
| DE (1) | DE102021113199A1 (de) |
| WO (1) | WO2022243120A1 (de) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102021132527A1 (de) | 2021-12-09 | 2023-06-15 | Endress+Hauser SE+Co. KG | Sensoranordnung |
| DE102022107534A1 (de) | 2022-03-30 | 2023-10-05 | Endress+Hauser SE+Co. KG | Sensor zur Bestimmung eines Drucks eines in einem Behältnis befindlichen Mediums |
| DE102022117897A1 (de) * | 2022-07-18 | 2024-01-18 | Endress+Hauser SE+Co. KG | System zur Bestimmung eines Drucks eines in einem Behältnis befindlichen Mediums |
| DE102024118612A1 (de) * | 2024-07-01 | 2026-01-08 | Endress+Hauser SE+Co. KG | Sensoranordnung |
Family Cites Families (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3742878A1 (de) | 1987-08-07 | 1989-07-06 | Siemens Ag | Optischer magnetfeldsensor |
| US5327105A (en) | 1991-12-31 | 1994-07-05 | Westinghouse Electric Corp. | Gas cell for a miniaturized atomic frequency standard |
| JP3238747B2 (ja) | 1992-06-18 | 2001-12-17 | パイオニア株式会社 | 適応型映像記録再生システム、適応型映像再生システム、適応型映像記録再生方法および適応型映像再生方法 |
| US6133800A (en) | 1999-08-02 | 2000-10-17 | Datum Inc. | Subminiature microwave cavity |
| US7126332B2 (en) * | 2001-07-20 | 2006-10-24 | Baker Hughes Incorporated | Downhole high resolution NMR spectroscopy with polarization enhancement |
| DE10207278B4 (de) * | 2002-02-21 | 2007-03-01 | Robert Bosch Gmbh | Verfahren zur Füllstandsbestimmung und Füllstandsmessvorrichtung |
| JP4066804B2 (ja) | 2002-12-19 | 2008-03-26 | 住友電気工業株式会社 | 光ファイバモジュール、光ファイバモジュールの波長分散調整方法及び光伝送システム |
| WO2008089302A1 (en) * | 2007-01-17 | 2008-07-24 | United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration | Wireless sensing system for non-invasive monitoring of attributes of contents in a container |
| KR20090017013A (ko) * | 2007-08-13 | 2009-02-18 | 삼성전자주식회사 | 자기장을 이용한 미세 입자 및 미생물 검출 장치 및 그방법 |
| US9506994B2 (en) * | 2010-04-06 | 2016-11-29 | Fmc Technologies, Inc. | Inductively interrogated passive sensor apparatus |
| US9329152B2 (en) | 2011-08-05 | 2016-05-03 | Wisconsin Alumni Research Foundation | Gas magnetometer |
| US10184796B2 (en) | 2013-04-10 | 2019-01-22 | Microsemi Frequency And Time Corporation | Chip-scale atomic gyroscope |
| DE102014106703A1 (de) | 2014-05-13 | 2015-11-19 | Endress+Hauser Flowtec Ag | Sensorelement und Verfahren zur Gewinnung elektrischer Energie aus Druckdifferenzen, sowie Wirbelströmungsmessgerät |
| DE102014219550A1 (de) | 2014-09-26 | 2016-03-31 | Robert Bosch Gmbh | Kombinationssensor zur Messung von Druck und/oder Temperatur und/oder Magnetfeldern |
| DE102016210259B4 (de) | 2016-06-10 | 2021-12-02 | Robert Bosch Gmbh | Sensorvorrichtung, Verfahren zum Kalibrieren einer Sensorvorrichtung und Verfahren zum Erfassen einer Messgröße |
| DE102017205099A1 (de) | 2017-03-27 | 2018-09-27 | Robert Bosch Gmbh | Sensorvorrichtung, Sensorvorrichtungseinheit, System und Verfahren zum Erfassen einer Messgröße sowie Verfahren zum Herstellen einer Sensorvorrichtung |
| DE102017205265A1 (de) | 2017-03-29 | 2018-10-04 | Robert Bosch Gmbh | Sensorvorrichtung, System und Verfahren zum Erfassen einer Messgröße |
| DE102018214617A1 (de) | 2018-08-29 | 2020-03-05 | Robert Bosch Gmbh | Sensoreinrichtung |
| DE102020123993A1 (de) | 2020-09-15 | 2022-03-17 | Endress+Hauser SE+Co. KG | Quantensensor |
| DE102021100223A1 (de) | 2021-01-08 | 2022-07-14 | Endress+Hauser SE+Co. KG | Sensorvorrichtung und Verfahren zur Bestimmung und/oder Überwachung einer Prozessgröße eines Mediums in einem Behälter |
-
2021
- 2021-05-20 DE DE102021113199.5A patent/DE102021113199A1/de active Pending
-
2022
- 2022-05-11 EP EP22728801.6A patent/EP4341648A1/de active Pending
- 2022-05-11 US US18/562,054 patent/US20240241082A1/en active Pending
- 2022-05-11 WO PCT/EP2022/062718 patent/WO2022243120A1/de not_active Ceased
- 2022-05-11 CN CN202280035987.3A patent/CN117337377A/zh active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| US20240241082A1 (en) | 2024-07-18 |
| DE102021113199A1 (de) | 2022-11-24 |
| CN117337377A (zh) | 2024-01-02 |
| WO2022243120A1 (de) | 2022-11-24 |
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