EP4028838A1 - Automation field device - Google Patents
Automation field deviceInfo
- Publication number
- EP4028838A1 EP4028838A1 EP20761545.1A EP20761545A EP4028838A1 EP 4028838 A1 EP4028838 A1 EP 4028838A1 EP 20761545 A EP20761545 A EP 20761545A EP 4028838 A1 EP4028838 A1 EP 4028838A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- antenna
- field device
- housing
- electromagnetic waves
- circuit board
- 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.)
- Withdrawn
Links
- 238000004891 communication Methods 0.000 claims description 15
- 238000005516 engineering process Methods 0.000 claims description 11
- 238000011156 evaluation Methods 0.000 claims description 11
- 239000004020 conductor Substances 0.000 claims description 10
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 claims description 10
- 230000005404 monopole Effects 0.000 claims description 3
- 239000002184 metal Substances 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 17
- 230000005540 biological transmission Effects 0.000 description 16
- 238000004519 manufacturing process Methods 0.000 description 8
- 210000004907 gland Anatomy 0.000 description 4
- 238000012544 monitoring process Methods 0.000 description 3
- 230000001419 dependent effect Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000010354 integration Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000004801 process automation Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004886 process control Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000012800 visualization Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
- G05B19/0423—Input/output
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
- H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
- H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
- H01Q9/04—Resonant antennas
- H01Q9/30—Resonant antennas with feed to end of elongated active element, e.g. unipole
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
- G05B2219/24—Pc safety
- G05B2219/24215—Scada supervisory control and data acquisition
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
- G05B2219/25—Pc structure of the system
- G05B2219/25011—Domotique, I-O bus, home automation, building automation
Definitions
- the invention relates to a field device in automation technology.
- field devices are often used which are used to determine, monitor, optimize and / or influence especially variable process variables.
- sensors are used that record process variables such as fill level, flow rate, pressure, temperature or conductivity.
- Actuators such as valves or pumps, are used to influence process variables
- Field devices often have a sensor unit, in particular at least temporarily and / or at least in sections, which is in contact with a process medium and which is used to generate a signal that is dependent on the process variable.
- these often have an electronic unit arranged in a housing, the electronic unit serving to process and / or forward signals generated by the sensor unit, in particular electrical and / or electronic signals.
- the electronics unit typically comprises at least one printed circuit board with components arranged thereon.
- field devices In principle, all devices that are used close to the process, that supply or process process-relevant information are referred to as field devices.
- field devices are also understood to mean remote I / Os (electrical interfaces), radio adapters or, in general, devices that are arranged on the field level. A large number of such field devices are manufactured and sold by the applicant.
- the higher-level units are control systems or control units, such as a PLC (programmable logic controller) or PLC (programmable logic controller).
- PLC programmable logic controller
- PLC programmable logic controller
- the higher-level units are used, among other things, for process control, visualization and monitoring as well as for commissioning the field devices.
- the process variables or data recorded by the field devices, in particular by their sensors, are transmitted to one or, if necessary, to several higher-level devices via the connected fieldbus
- the end device is, for example, a smartphone, a tablet, data glasses, or a mobile end device specific to process automation technology such as the FieldXpert sold by Endress + Hauser. So that wireless data transmission can be implemented, the field devices must be equipped with a corresponding radio antenna that is set up to emit and receive electromagnetic waves.
- the field device housings are mostly made of a conductive material, in particular metal, which ensure that the electromagnetic waves are only greatly weakened or possibly not allowed through at all. This in turn means that the range of the radio signal for wireless data transmission with the field device is very short.
- the prior art in DE 102014 118 391 A1 proposes a field device in which electromagnetic waves emitted by a primary antenna located inside the field device couple to a first secondary antenna inside the housing and then from the first Secondary antenna to a second secondary antenna outside the
- Housing are transmitted so as to be decoupled from the second secondary antenna.
- the transmission from the inside of the housing to the outside of the housing takes place here by means of guided waves, the losses of which are lower than free waves.
- the secondary antennas are placed in an unused cable gland.
- the disadvantage of the solution described in DE 10 2014 118 391 A1 is its complex structure, consisting of several individual antennas, which must be coordinated with one another. Another disadvantage is that the screwed cable gland with the secondary antenna integrated in it can no longer be used for the intended use of passing a cable through.
- a disadvantage of the solution disclosed in DE 10 2012 109 539 A1 is, on the one hand, that the coil arrangement for transmission from the housing opening must be arranged at a certain point inside the housing, and on the other hand, that the coil arrangement disclosed therein does not go into the electronics unit of the field device can be integrated.
- DE 10 2017 110 597 A1 discloses the solution of using a flexible film to apply an antenna to a plastic cable screw connection of a feed-through cable.
- the antenna is in turn connected to the electronics unit of the field device by means of a coaxial conductor, so that a wireless communication link with the electronics unit can be established by means of the antenna.
- the disadvantage of the solution disclosed in DE 10 2017 110 597 A1 is that the special adaptation of the feed-through cable described therein is relatively cumbersome or may even be undesirable in the industries mentioned above. Last but not least, as standard feed-through cables are preferred.
- the object of the invention is therefore to specify a field device that is easy to manufacture and has an electronics unit with an antenna integrated therein.
- the task is solved by a field device of automation technology, having:
- an electronics unit arranged in the interior of a housing and having at least one printed circuit board; -a arranged in the housing opening and leading into the interior of the housing
- Cable connection with a plastic component wherein a cable with a further plastic component can be connected to the cable connection;
- an antenna which is arranged on a first printed circuit board of the electronics unit, - the antenna being designed to transmit and receive electromagnetic waves with at least one predetermined wavelength
- the antenna being aligned in such a way that it is designed to transmit electromagnetic waves in the direction of the housing opening and to receive electromagnetic waves to be received from the direction of the housing opening, --and wherein the plastic components are permeable to the electromagnetic waves, so that electromagnetic waves emitted by the antenna can be transmitted from the inside of the housing via the plastic components, and electromagnetic waves to be received by the antenna can be transmitted via the plastic components into the interior of the housing, whereby by means of the antenna, a wireless communication link can be established between the electronics unit and a transmitting / receiving unit arranged outside the housing of the field device.
- the plastic components are permeable to the electromagnetic waves
- the integration of the antenna into the electronics unit can take place very easily in the context of the manufacture of the electronics unit of the field device, for example in the manufacture and / or assembly of the circuit board of the electronics unit.
- the antenna is designed in such a way that it can be used for a predetermined
- Frequency or wavelength is matched.
- Usual communication frequencies are, for example, usually 2.4 GHz (WLAN, Wi-Fi, Wi-Fi, Wi-Fi, Wi-Fi, Wi-Fi, Wi-Fi, Wi-Fi, Wi-Fi, Wi-Fi, Wi-Fi, Wi-Fi, Wi-Fi, Wi-Fi, Wi-Fi, Wi-Fi, Wi-Fi, Wi-Fi, Wi-Fi, Wi-Fi, Wi-Fi, Wi-Fi, etc.
- the antenna can be designed by means of appropriate antenna structures in such a way that it is used to transmit data in accordance with the Bluetooth standard IEEE 802.15 or a variant modified therefrom, e.g. Bluetooth LE (Low Energy).
- Bluetooth LE Low Energy
- the antenna and the plastic parts that are permeable to the emitted / received electromagnetic waves i.e. the plastic part of the cable connection and the further plastic part of a cable connected to it
- a wireless communication link is established between the electronics unit and a corresponding (ie on the specified wavelength tuned) transmitter / receiver unit can be produced.
- the transmitting / receiving unit is, for example, part of an above-mentioned mobile terminal.
- the housing can be designed as an otherwise fully welded housing.
- it is a metallic housing with exactly one housing opening which is filled by the cable connection leading into the housing interior.
- the antenna arranged on the first printed circuit board is integrated into the electronics unit, that it is encompassed by a component soldered onto the first printed circuit board and / or that it is formed by a conductor track arranged on the first printed circuit board.
- the antenna is part of the production of the printed circuit board (if the antenna is formed by a conductor track arranged on the first printed circuit board) and / or as part of the production of the electronics unit when the printed circuit board is processed (if the antenna is encompassed by a component soldered onto the printed circuit board ) can be integrated into the electronics unit.
- the addition of the antenna in the usual context of manufacturing and / or processing a circuit board leads to very little additional effort.
- the field device is therefore very easy to manufacture.
- a cable connected to it is connected to the electronics unit via the cable connection, so that the electronics unit can be supplied with electrical energy by means of the cable and / or can be communicated with the electronics unit in a wired manner.
- wired communication reference is again made to the field buses described at the beginning.
- the wired communication and / or energy supply can also take place via the cable of an analog measurement transmission path, e.g. via a 4-20 mA measurement transmission path, to which the field device is connected, e.g. via a 2 or 4-wire cable.
- the antenna is a monopole antenna, in particular with a length of 1/4 of the predetermined wavelength.
- the field device comprises a further component, arranged on the first printed circuit board, with a signal generation / evaluation unit which is used to generate the electromagnetic waves emitted by the antenna and for the
- the component comprising the antenna and / or the signal generation / evaluation unit is / are designed as an SMD component. Since an SMD component is soldered together with other SMD components in a single reflow process, the integration of the antenna in the electronics unit does not cause any additional process steps in production in this case.
- the first circuit board with the signal generation / evaluation unit and the antenna forms a module which is arranged on a second circuit board of the electronics unit.
- the component comprising the antenna and / or the conductor track forming the antenna for transmitting and / or receiving the electromagnetic waves through the housing opening with respect to the housing opening is / are arranged at an essentially arbitrarily predeterminable position on the first circuit board , or the module for transmitting and / or receiving the electromagnetic waves through the housing opening is in relation to the
- Housing opening arranged at a substantially arbitrarily predeterminable position on the second printed circuit board.
- the direction of transmission or reception of the antenna is essentially only determined via its alignment.
- the antenna (the module) is therefore arranged at any position on the first circuit board (second circuit board) that can be predetermined.
- the direction of reception / transmission with regard to the arrangement of the antenna on the first (second) circuit board.
- the housing opening has a cable screw connection for the cable, in particular with a metric thread.
- the cable is connected to the cable connection by means of the cable gland.
- the field device is preferably used in the aforementioned industries with increased hygiene requirements. The configurations mentioned below are relevant for this.
- the cable connection and the cable connected to it by means of the screwed cable connection essentially completely fills the housing opening and seals it, in particular, in a liquid-tight manner.
- the housing apart from the housing opening completely filled by the cable connection and the cable connected to it, is an otherwise completely closed, in particular fully welded, metallic housing.
- the field device conforms to an IP degree of protection with a degree of protection of IP69K in accordance with the DIN EN 60529 standard.
- the invention is explained in more detail with reference to the following figures, which are not true to scale, with the same reference symbols denoting the same features. If it is necessary for clarity or if it appears to be useful in some other way, the reference symbols already mentioned are dispensed with in the following figures.
- FIG. 1 A perspective view of a field device in automation technology according to a first embodiment of the invention
- FIG. 2a-2c top views of various configurations of the electronics unit of a field device according to the invention in automation technology.
- the field device has a sensor unit (not shown) which enables the generation of one of the Process variable-dependent signal is used, as well as an electronics unit 3 with a first printed circuit board 4 arranged in a housing interior G1.
- a cable connection 5 leading into a housing interior G1 is disposed in a housing opening 2.
- the field device can be connected to a pipe and / or a container wall via a process connection PA, so that the sensor unit is in contact with a medium arranged in a pipe or container for determining and / or monitoring the Process size of the medium can be brought.
- the housing opening 2 additionally comprises a screwed cable connection 15, here a metric M12 thread, by means of which a cable 14 can be connected to the cable connection 5.
- the cable connection 5 (see dashed lines) is shown again in more detail in a plan view (from above, i.e. rotated by 90 ° in relation to the perspective view, about an axis running horizontally along the plane of the paper).
- the cable connection 5 comprises an external metallic part and an internal plastic part KA, into which the 4-conductors (black dots) of the cable connection 5 are integrated.
- the plastic component KA of the cable connection 5 is formed, for example, by insulating the cable connection 5.
- the cable connection 5 is here an M12 plug, that is to say a standardized plug, to which a standardized cable 14 is connected by means of the screwed cable connection 15 with a metric thread of a specific diameter is connectable.
- the cable 14 connected to the cable connection 5 also comprises a (further) plastic component KA2.
- the cable 14 connected to the cable connection 5 with a first end section is thus connected to the electronics unit 3 arranged in the housing interior G1.
- the cable 14 is used to supply the electronics unit 3 or the field device with electrical energy and / or for wired communication with the electronics unit 3 or the field device.
- the cable 14 is connected to a higher-level unit (not shown), for example the aforementioned SPS or PLC, with possibly a voltage supply, with its second end section essentially opposite the first end section,
- the electronics unit 3 has an antenna 6.
- the antenna 6 is arranged on the first printed circuit board 4 of the electronics unit 3, the antenna 6 being oriented in such a way that it is used for emitting electromagnetic waves EW in the direction of the housing opening 2 and for receiving electromagnetic waves to be received from the direction of the housing opening 2 EW is designed.
- the transmission or reception direction is therefore essentially determined on the basis of an alignment of the antenna 6.
- the electromagnetic waves EW representing the received or transmitted signal can be sent out or sent in through the plastic component KA of the cable connection 5, in this case the M12 cable connector.
- a wireless communication link KV can be established between the electronics unit 3 and a corresponding transmitting / receiving unit 7.
- the antenna is tuned to a common communication frequency, usually 2.4 GHz (WLAN, Bluetooth, ANT).
- a common communication frequency usually 2.4 GHz (WLAN, Bluetooth, ANT).
- the antenna 6 is designed in such a way that it is used to transmit data in accordance with the Bluetooth standard IEEE 802.15 or a variant modified thereof, for example Bluetooth LE (for “Low Energy”).
- FIGS. 2a to 2c show top views of different configurations of the first printed circuit board 4 and a second printed circuit board 13 of the electronics unit.
- the configurations each show different options for integrating the antenna 6 into the first printed circuit board of the electronics unit 3.
- the antenna 6 is designed as an SMD-solderable component 8 which is arranged on the first printed circuit board 4. Furthermore, a further component 10, which has the signal generation / evaluation unit 11, is arranged on the first printed circuit board 4.
- the further component 10 is thus a highly integrated component (so-called “system-on-chips”), which has the task of generating and evaluating signals of the electromagnetic waves EW emitted or received by the antenna 6 with a customary type mentioned above Communication frequency or wavelength takes over.
- the further component 11 is advantageously also designed as an SMD component.
- FIG. 2b a configuration similar to the configuration shown in FIG. 2a shows, only that, in contrast to FIG. 2a in FIG. 2b, the antenna 6 is formed by means of a specially structured and aligned conductor track 9.
- the component e already shown in FIG. 2a with the antenna 6, the further component 10 with the signal generation / evaluation unit 11 and the first circuit board 4 form a module 12.
- the module 12 is in turn on a second circuit board 13 the electronics unit 3 arranged.
- the antenna 6 is designed as a monopole antenna, preferably a Lamba / 4 or quarter-wave radiator.
- the transmission / reception direction of the antenna 6 is advantageously essentially independent of the position of the antenna 6 on the first circuit board 4 (FIGS.
- the transmission / reception direction of the antenna 6 determined by the alignment of the component 8, the structured conductor track 9 or the module 12 is specified according to the invention in that (in the event that the first circuit board 4 or the second circuit board 13 is specified in a Installation position is built into the housing 1) shows the transmission / reception direction in the direction of the housing opening 2 (ie in the direction of the cable connection 5 arranged therein with the plastic component KA).
- the invention is particularly advantageous in the case of a housing 1 that is otherwise fully welded apart from the housing opening 2, which is configured, for example, conforming to an IP protection rating with a protection rating of IP69K in accordance with the DIN EN 60529 standard.
- a wireless communication link KV can also be established in this case between the electronics unit 3 and a corresponding transmitting / receiving unit 7 (ie which is designed to receive / transmit electromagnetic waves EW of the specified wavelength).
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Support Of Aerials (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
- Transceivers (AREA)
- Arrangements For Transmission Of Measured Signals (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102019124704.7A DE102019124704A1 (en) | 2019-09-13 | 2019-09-13 | Field device of automation technology |
PCT/EP2020/073393 WO2021047885A1 (en) | 2019-09-13 | 2020-08-20 | Automation field device |
Publications (1)
Publication Number | Publication Date |
---|---|
EP4028838A1 true EP4028838A1 (en) | 2022-07-20 |
Family
ID=72240417
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20761545.1A Withdrawn EP4028838A1 (en) | 2019-09-13 | 2020-08-20 | Automation field device |
Country Status (5)
Country | Link |
---|---|
US (1) | US20220326672A1 (en) |
EP (1) | EP4028838A1 (en) |
CN (1) | CN114375425A (en) |
DE (1) | DE102019124704A1 (en) |
WO (1) | WO2021047885A1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN113906819A (en) | 2019-12-20 | 2022-01-07 | 施耐德电子系统美国股份有限公司 | Intelligent wireless adapter |
DE102021122562A1 (en) | 2021-08-31 | 2023-03-02 | Endress+Hauser SE+Co. KG | Ring-shaped protective gas nozzle |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102011087588A1 (en) * | 2011-12-01 | 2013-06-06 | Endress + Hauser Conducta Gesellschaft für Mess- und Regeltechnik mbH + Co. KG | Field device for automation technology |
DE102012109539A1 (en) * | 2012-10-08 | 2014-06-12 | Endress + Hauser Gmbh + Co. Kg | Device for transmitting signals from a metal housing |
DE102014117315A1 (en) * | 2014-11-26 | 2016-06-02 | Endress + Hauser Gmbh + Co. Kg | Device for transmitting signals from a housing opening of a metallic housing |
DE102014118391A1 (en) * | 2014-12-11 | 2016-06-16 | Endress + Hauser Gmbh + Co. Kg | Device for transmitting signals from a metal housing |
EP3056953A1 (en) * | 2015-02-11 | 2016-08-17 | Siemens Aktiengesellschaft | Self-contained field device used in automation technology for remote monitoring |
DE102017102587A1 (en) * | 2017-02-09 | 2018-08-09 | Krohne Messtechnik Gmbh | Level switch and method for determining a level limit of a medium in a container |
DE102017110597A1 (en) * | 2017-05-16 | 2018-11-22 | Endress+Hauser SE+Co. KG | Field device of automation technology |
CN109961125A (en) * | 2017-12-26 | 2019-07-02 | 广州市创机自动化科技有限公司 | Field device for automatic control technology |
-
2019
- 2019-09-13 DE DE102019124704.7A patent/DE102019124704A1/en active Pending
-
2020
- 2020-08-20 CN CN202080063462.1A patent/CN114375425A/en active Pending
- 2020-08-20 WO PCT/EP2020/073393 patent/WO2021047885A1/en unknown
- 2020-08-20 US US17/753,652 patent/US20220326672A1/en active Pending
- 2020-08-20 EP EP20761545.1A patent/EP4028838A1/en not_active Withdrawn
Also Published As
Publication number | Publication date |
---|---|
CN114375425A (en) | 2022-04-19 |
US20220326672A1 (en) | 2022-10-13 |
DE102019124704A1 (en) | 2021-03-18 |
WO2021047885A1 (en) | 2021-03-18 |
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