EP3765931A1 - Feldgerät mit einem metallgehäuse, einer durch eine kabeldurchführung geführten anschlussleitung und einem funkmodul mit einer antenne - Google Patents
Feldgerät mit einem metallgehäuse, einer durch eine kabeldurchführung geführten anschlussleitung und einem funkmodul mit einer antenneInfo
- Publication number
- EP3765931A1 EP3765931A1 EP19711843.3A EP19711843A EP3765931A1 EP 3765931 A1 EP3765931 A1 EP 3765931A1 EP 19711843 A EP19711843 A EP 19711843A EP 3765931 A1 EP3765931 A1 EP 3765931A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- antenna
- field device
- radio module
- housing
- cable
- 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- Withdrawn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
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—Program-control systems
- G05B19/02—Program-control systems electric
- G05B19/04—Program control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Program control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
- G05B19/0423—Input/output
-
- 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
- H01Q1/225—Supports; Mounting means by structural association with other equipment or articles used in level-measurement devices, e.g. for level gauge measurement
-
- 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
- H01Q1/2208—Supports; Mounting means by structural association with other equipment or articles associated with components used in interrogation type services, i.e. in systems for information exchange between an interrogator/reader and a tag/transponder, e.g. in Radio Frequency Identification [RFID] systems
- H01Q1/2233—Supports; Mounting means by structural association with other equipment or articles associated with components used in interrogation type services, i.e. in systems for information exchange between an interrogator/reader and a tag/transponder, e.g. in Radio Frequency Identification [RFID] systems used in consumption-meter devices, e.g. electricity, gas or water meters
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/44—Details of, or arrangements associated with, antennas using equipment having another main function to serve additionally as an antenna, e.g. means for giving an antenna an aesthetic aspect
- H01Q1/46—Electric supply lines or communication lines
-
- 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
- G05B2219/10—Plc systems
- G05B2219/15—Plc structure of the system
- G05B2219/15117—Radio link, wireless
-
- 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
- G05B2219/25428—Field device
Definitions
- Field device with a metal housing, a cable run through a cable gland and a radio module with an antenna
- the present invention relates to a field device with a Me tallgephaseuse, a guided through a cable bushing connection line and a radio module with an antenna.
- field devices are often used which serve to detect and / or influence process variables.
- Examples of such field devices are level gauges, level gauges and pressure gauges with sensors that detect the corresponding process variables level, level or pressure.
- such field devices are connected to higher-level units, for example control systems or control units. These higher-level units are used for process control, process visualization and / or process monitoring.
- field devices with metallic housings are used because of their mechanical stability and resistance to environmental influences.
- field devices When field devices are used in potentially explosive environments, they must meet certain requirements which also require the use of metal housings.
- explosion-proof flameproof enclosure Ex-d
- the components that can trigger an ignition eg. A flammable gas
- the openings of the housing are such that a transmission of the explosion to the outside is prevented. All closures and bushings of the housing are to be designed according to this type of protection and are therefore sometimes very expensive to design.
- radio modules for easier operation and parameterization of field devices. Operation and parameterization via radio modules makes it easier for the operating personnel to work on site, since the field device, for example, does not need to be opened for parameterization and, if necessary, must be completely disconnected from the system in potentially explosive environments.
- radio modules are in contradiction to metal housings. Is a radio transmitter / receiver together with the remaining sensor electronics of a filling
- a field device with a metal housing, a guided through a cable gland connection line and a radio module with an antenna, characterized in that the antenna housing at least partially outside the Ge, parallel to the connecting cable and in the cable implementation runs.
- the antenna can be designed as a dipole antenna, in particular as a 1/4 or 1/2 dipole.
- a wire stub antenna is an antenna formed from a piece of wire or another conductor understood that preferably has a length of 1/4. At frequencies of several GHz, it is possible that the antenna is completely located in the cable gland. As a result, a compact arrangement is created that does not require additional attachments.
- the antenna can in particular during the production of the cable bushing tion already embedded in this and molded with plastic.
- connection cable to be connected to the radio module and used as an antenna. It is thus possible to use an additional wire of the connecting cable or a shield of the connecting cable as an antenna.
- the shield is connected via a frequency-selective circuit to ground, preferably the housing.
- a frequency-selective circuit to ground, preferably the housing.
- the frequency-selective circuit is for this purpose preferably designed such that it is high-impedance at a transmission and reception frequency of the radio module.
- the radio signals are not derived on the transmission frequency of the radio module for housin semasse but the antenna, respectively, the gui determination of the connecting line supplied to the radiation.
- received radio signals are also not available Housing mass derived but supplied to the radio module for further processing.
- the frequency-selective circuit is preferably low impedance, ie permeable and dissipates this to the housing ground.
- the transmission and reception frequency of the radio module is preferably between 400 MHz and 10 GHz. All common radio standards for data communication via radio, in particular Bluetooth, Wireless HART, ZIGBEE, WLAN, mobile radio (GSM, LTE, etc And LoRa (Long Range Wide Area Network) can be covered in this frequency band.
- Figure 1 shows a first embodiment of a field device ge according to the present application
- Figure 2 shows a second embodiment of a field device ge according to the present application.
- Figure 1 shows a schematic diagram of a firstmittedsbei game of a field device 1 according to the present application.
- the field device 1 is shown only schematically in FIG. 1 for the sake of clarity. To explain the idea underlying the present application, only a Me tallgeophuse 3 of the field device 1 and a disposed in the metal housing 3 radio module 9 is shown. A variety of other components, in particular electronics, an energy Supply and any existing sensors are not illustrated.
- the metal housing 3 has a grommet 5, which seals an opening in the metal housing 3 in accordance with the Prehal border regulations for explosion protection.
- An on circuit line 7 is passed through the cable bushing 5 from an outside of the metal housing 3 into the housing interior.
- the metal housing 3 and the cable bushing are in vorlie lowing embodiment in the type of protection flameproof enclosure, which is also referred to as Ex-d executed.
- the metal housing 3 in the present embodiment a single cable gland 5, through which the connection line 7 is guided. This is particularly advantageous because more cable penetrations each would require a high sealing effort, which can be avoided in this way.
- the connecting line is designed in the present embodiment as a two-wire line with a shield 13.
- This is a typical embodiment, on the one hand a Messwer tübertragung to a higher-level unit, for example.
- a Leit wait over the 4-20 mA protocol and / or bidirectional communication with the field device via, for example, the HART protocol allows, and on the other hand, the field device powered by the 4-20 mA current loop.
- the radio module 9 is at its transmitting and receiving port via a capacitor C, which ensures a galvanic isolation, with a shield 13 of the connecting cable 7 verbun the.
- the shield 13 is also a frequency-selective Circuit 15, for example.
- the frequency-selective circuit 15 is designed so that it is high-impedance at a transmission and reception frequency f of the radio module 9, and simultaneously derives other frequencies, in particular in the field of electromagnetic interference to the housing ground.
- the shield 13 continues to fulfill its original task, namely the shielding and dissipation of electromagnetic interference, and at the same time, in the range of the transmission and reception frequency f of the radio module 9, is used as an antenna.
- a transmission signal provided by the radio module 9 is thus guided out of the metal housing 3 without additional design effort by the cable feedthrough 5 and can be radiated there without impairment.
- an additional, otherwise unused wire of the connection line can be used as an antenna 11.
- this Ausgestal device can be dispensed with the frequency-selective circuit 15, since the screen 13 of the connecting line 7 can be regularly connected to the housing. It should be noted here that the additional wire may not be shielded to allow the radio signal to be transmitted, since the shielding would otherwise prevent radiation.
- connection line 7 can also be designed as a special cable.
- a multi-shielded, eg double-shielded, cable may be used, and an outer shield may be used as the antenna 11 for the purposes of the present application, while an inner shield may be used Shield is connected to the housing. Also in this case can be dispensed with a frequency-selective circuit 15 who the.
- FIG. 2 shows a further exemplary embodiment of a Feldge device according to the present application.
- the radio module 9 is connected via a capacitance C, which ensures galvanic isolation, to an antenna 11, which is designed as a rod antenna, in the present case as a wire stub antenna.
- the antenna 11 is embedded in a modified cable bushing 5.
- the antenna 11 is in the cable passage 5, which is made of a plastic, be already be encapsulated in the manufacture of the cable gland 5 with the plastic of the grommet, so le diglich an electrical connection to the radio module 9 Herge must be ,
- the antenna can also be arranged in a recess of the Ka bel notebook arrangement 7 or embedded in a guide arranged in the cable guide 7 seal.
- an antenna 11 is provided by an arrangement outside the Me tallgeophuses 3, wherein for the transfer of the radio signal from the interior of the metal housing 3 to the outside an existing and otherwise used cable implementation is used.
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Details Of Aerials (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102018105903.5A DE102018105903A1 (de) | 2018-03-14 | 2018-03-14 | Feldgerät mit einem Metallgehäuse, einer durch eine Kabeldurchführung geführten Anschlussleitung und einem Funkmodul mit einer Antenne |
| PCT/EP2019/055854 WO2019175051A1 (de) | 2018-03-14 | 2019-03-08 | Feldgerät mit einem metallgehäuse, einer durch eine kabeldurchführung geführten anschlussleitung und einem funkmodul mit einer antenne |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP3765931A1 true EP3765931A1 (de) | 2021-01-20 |
Family
ID=65817976
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP19711843.3A Withdrawn EP3765931A1 (de) | 2018-03-14 | 2019-03-08 | Feldgerät mit einem metallgehäuse, einer durch eine kabeldurchführung geführten anschlussleitung und einem funkmodul mit einer antenne |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US11387543B2 (de) |
| EP (1) | EP3765931A1 (de) |
| CN (1) | CN111406241A (de) |
| DE (1) | DE102018105903A1 (de) |
| WO (1) | WO2019175051A1 (de) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7259827B2 (ja) * | 2020-10-30 | 2023-04-18 | 横河電機株式会社 | フィールド機器ケース及びフィールド機器 |
| DE102021213362A1 (de) | 2021-11-26 | 2023-06-01 | Robert Bosch Gesellschaft mit beschränkter Haftung | Gehäuse für eine Fertigungseinrichtung |
| EP4400922B1 (de) * | 2023-01-11 | 2025-09-10 | VEGA Grieshaber KG | Feldgerät mit funkmodul und verfahren zur datenfernübertragung |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100053005A1 (en) * | 2008-08-28 | 2010-03-04 | Kouichi Mukai | Receiver apparatus, junction cable, and power supply apparatus |
| US20110316757A1 (en) * | 2010-06-29 | 2011-12-29 | Yokogawa Electric Corporation | Wireless explosion-proof apparatus |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3573962B2 (ja) * | 1998-06-15 | 2004-10-06 | 三菱電機株式会社 | 防爆基地局装置 |
| US6980174B2 (en) * | 2002-09-30 | 2005-12-27 | Magnetrol International, Inc. | Process control instrument intrinsic safety barrier |
| US8694060B2 (en) * | 2008-06-17 | 2014-04-08 | Rosemount Inc. | Form factor and electromagnetic interference protection for process device wireless adapters |
| DE102010043031A1 (de) * | 2010-10-28 | 2012-05-03 | Endress + Hauser Flowtec Ag | Funk-Feldgerät |
| FR2978874B1 (fr) * | 2011-08-02 | 2014-01-24 | Sagemcom Energy & Telecom Sas | Ensemble de deux equipements electroniques relies par une liaison filaire formant antenne |
| DE102012109539A1 (de) * | 2012-10-08 | 2014-06-12 | Endress + Hauser Gmbh + Co. Kg | Vorrichtung zur Übertragung von Signalen aus einem Metallgehäuse |
| EP3207591B1 (de) * | 2014-10-16 | 2019-03-27 | Signify Holding B.V. | Versorgungskabel, treiberanordnung mit drahtloser steuerungsfunktion und steuerungsverfahren |
| DE102014118391A1 (de) * | 2014-12-11 | 2016-06-16 | Endress + Hauser Gmbh + Co. Kg | Vorrichtung zur Übertragung von Signalen aus einem Metall-Gehäuse |
| DE102015110350A1 (de) * | 2015-06-26 | 2016-12-29 | Endress + Hauser Flowtec Ag | Adapter für den Anschluss einer Übertragungsleitung an ein Feldgerät |
| DE102017110597A1 (de) * | 2017-05-16 | 2018-11-22 | Endress+Hauser SE+Co. KG | Feldgerät der Automatisierungstechnik |
-
2018
- 2018-03-14 DE DE102018105903.5A patent/DE102018105903A1/de active Pending
-
2019
- 2019-03-08 US US16/762,431 patent/US11387543B2/en active Active
- 2019-03-08 WO PCT/EP2019/055854 patent/WO2019175051A1/de not_active Ceased
- 2019-03-08 EP EP19711843.3A patent/EP3765931A1/de not_active Withdrawn
- 2019-03-08 CN CN201980005997.0A patent/CN111406241A/zh active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100053005A1 (en) * | 2008-08-28 | 2010-03-04 | Kouichi Mukai | Receiver apparatus, junction cable, and power supply apparatus |
| US20110316757A1 (en) * | 2010-06-29 | 2011-12-29 | Yokogawa Electric Corporation | Wireless explosion-proof apparatus |
Non-Patent Citations (1)
| Title |
|---|
| See also references of WO2019175051A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| US11387543B2 (en) | 2022-07-12 |
| CN111406241A (zh) | 2020-07-10 |
| US20210218122A1 (en) | 2021-07-15 |
| DE102018105903A1 (de) | 2019-09-19 |
| WO2019175051A1 (de) | 2019-09-19 |
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