WO2018050422A1 - Adaptation de la puissance d'émission et/ou de réception dans un appareil de terrain - Google Patents

Adaptation de la puissance d'émission et/ou de réception dans un appareil de terrain Download PDF

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Publication number
WO2018050422A1
WO2018050422A1 PCT/EP2017/071343 EP2017071343W WO2018050422A1 WO 2018050422 A1 WO2018050422 A1 WO 2018050422A1 EP 2017071343 W EP2017071343 W EP 2017071343W WO 2018050422 A1 WO2018050422 A1 WO 2018050422A1
Authority
WO
WIPO (PCT)
Prior art keywords
field device
wireless module
receiver
module
power
Prior art date
Application number
PCT/EP2017/071343
Other languages
German (de)
English (en)
Inventor
Christian Seiler
Original Assignee
Endress+Hauser Gmbh+Co. Kg
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 Endress+Hauser Gmbh+Co. Kg filed Critical Endress+Hauser Gmbh+Co. Kg
Publication of WO2018050422A1 publication Critical patent/WO2018050422A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/01—Protocols
    • H04L67/12—Protocols specially adapted for proprietary or special-purpose networking environments, e.g. medical networks, sensor networks, networks in vehicles or remote metering networks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/70—Services for machine-to-machine communication [M2M] or machine type communication [MTC]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/80—Services using short range communication, e.g. near-field communication [NFC], radio-frequency identification [RFID] or low energy communication
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/18—TPC being performed according to specific parameters
    • H04W52/24—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters
    • H04W52/245—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters taking into account received signal strength
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/18—TPC being performed according to specific parameters
    • H04W52/24—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters
    • H04W52/246—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters where the output power of a terminal is based on a path parameter calculated in said terminal
    • 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
    • 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
    • G05B2219/30—Nc systems
    • G05B2219/33—Director till display
    • G05B2219/33331—Test, diagnostic of field device for correct device, correct parameters

Definitions

  • the invention relates to a method for improving the measurement performance of a field device of process automation and such a field device.
  • field devices are often used to detect and / or influence process variables.
  • a large number of such field devices are manufactured and distributed by the Endress + Hauser Group.
  • field devices are connected to a control center using two-wire technology
  • Field device to be shared.
  • the sensor element for detecting the process variable, the communication with other units and the controller have to get along with the existing power budget.
  • Field device has the potential in the industrial sector to reduce costs for wiring, to improve the usability and thus benefit for the
  • Energy storage capacitor has sufficient capacity. The duration of the period between the individual measurements then depends on how much power is required by the wireless interface and further functional modules in the system just out of the two-wire current loop. Excess power is stored in the corresponding energy storage capacitor.
  • US Pat. No. 7,262,693 discloses the use of a capacitor to latch the energy from the bus and then to it
  • both functions radio transmission and measurement
  • both functions can often not be operated simultaneously because then a synchronization of the various units is necessary, so that the power balance of the entire
  • Device can be maintained or it is often necessary to give priority to one of the functions in terms of energy consumption.
  • the invention is based on the object, a sufficiently high
  • the field device comprises at least one wireless module and at least one functional module for detecting a measured variable and wherein the field device is supplied with energy by a two-conductor bus is, and wherein depending on environmental parameters, the transmission and / or reception power of the wireless module is adjusted.
  • the measurement performance of the field device is increased by changing operating parameters, and vice versa.
  • the operating parameters are the measuring rate, measuring power, resolution, mathematical operations, clock rate of participating computing units, activation of additional evaluation units,
  • connection quality between the field device and a receiver is measured, and the transmission and / or reception power is reduced to a defined minimum, so that the required measurement performance is still maintained.
  • the consumed power of the wireless module is reduced and thus more energy is available to the functional module.
  • connection quality determined by the ambient conditions is determined by the field device and / or the receiver by means of the measurement of the Received Signal Strength Indicator (RSSI) and / or the
  • the distance from field device to receiver can be determined at least qualitatively on the basis of this measurement.
  • the operation of the wireless module and the functional module is controlled so that the wireless module energy priority over the functional module has priority. It is particularly advantageous that no synchronization takes place between the wireless module and the functional module.
  • the environmental parameters are preferably at least one of the parameters: distance between the field device and a receiver,
  • the object is likewise achieved by a field device which is set up to carry out a method described above.
  • Fig. 1 shows a field device in which the method according to the invention is applied.
  • Fig. 1 shows field devices FG of process automation technology. More specifically, two field devices FG1 and FG2 are depicted, these being sensors.
  • the sensor is a pH, redox potential, ISFET, conductivity, turbidity or oxygen sensor. Further possible sensors are flow sensors according to the principles of Coriolis, magnetic induction, vortex and ultrasound. Further possible sensors are sensors for measuring the fill level according to the principles of guided and free-radar radar and ultrasound, also for detecting a limit level, which can also be used to detect the limit level and capacitive methods.
  • the sensor comprises a sensor element as a function module M of the field device FG. Also, the sensor element may be part of the electronic circuit 2, see below.
  • the field device FG determines a measured variable of a medium 1, in the example in a cup as shown on the left side. Nevertheless, they are other containers such as pipes, tanks (as shown on the right), containers, boilers, pipes, pipes or similar possible.
  • the field device FG communicates with a control station, such as directly with a control system 5 or with an intermediate transmitter. Also, the control station FG communicates with a control station, such as directly with a control system 5 or with an intermediate transmitter. Also, the control station FG communicates with a control station, such as directly with a control system 5 or with an intermediate transmitter. Also, the control station FG communicates with a control station, such as directly with a control system 5 or with an intermediate transmitter. Also, the
  • Transmitter part of the field device such as in the case of the level sensor.
  • the interface 6 to the bus additionally or alternatively as a wireless interface, such as the WirelessHART standard (not shown), via WirelessHART a connection directly to a control system via a gateway.
  • a 4..20 mA interface is optionally or additionally provided in the case of the HART protocol (not shown). Is this done?
  • PROFIBUS PA or FOUNDATION Fieldbus or a proprietary protocol of the "Mennosens" type, for example, is used, and corresponding field devices as described above are marketed by the Applicant.
  • an interface 6 for connection to the two-wire bus 4 is provided on the bus-side end of the field device FG. Shown is a wired variant for connection to the bus by means of the interface 6.
  • the interface 6 is, for example, as a galvanically isolating, in particular as inductive
  • the interface 6 designed. This is shown with the pH sensor.
  • the interface 6 then consists of two parts with a first part on the field device side and a second part on the bus side. These are by means of a mechanical
  • Plug connection can be coupled together.
  • Data (bidirectional) and energy (unidirectional, i.e., in the direction from the control station 5 to the field device FG) are sent via the interface 6.
  • an appropriate cable with or without galvanic isolation is used.
  • Possible versions include a cable with an M12 or 7/8 "plug
  • the field device FG further comprises an electronic circuit 2 comprising a wireless module BT for wireless communication 3. This wireless
  • the wireless module BT is designed as a Bluetooth module.
  • the module complies with the protocol stack Low Energy as "Bluetooth Low Energy” (also known as BTLE, BLE, or Bluetooth Smart.) If necessary, the wireless module BT comprises a corresponding circuit or components The field device FG thus satisfies at least the "Bluetooth 4.0" standard. ,
  • the communication 3 is performed by the field device FG to a higher-level unit H here or receiver.
  • the higher-level unit H is, for example, a mobile unit such as a
  • the higher-level unit H can also be designed as a non-portable device, such as a computer.
  • the higher-level unit H is a display with a corresponding interface.
  • the operating parameters are, for example, the measuring rate, measuring accuracy, resolution,
  • Wireless module BT adapted.
  • environment parameters should be at least one of the parameters distance between field device FG and a receiver H, atmospheric attenuation / absorption, attenuation / absorption by persons and objects in the vicinity of the field device FG and / or the receiver H, and / or reflections and extinction by superimposition of radio waves, electromagnetic interference fields / waves, other sparking systems in the
  • the measurement of the Received Signal Strength Indicator should be mentioned.
  • the RSSI is the received broadband power in the frequency channel, including thermal noise and noise generated in the receiver itself. Also, the power components from all other sources, for example, neighboring neighboring cells and adjacent channel interference, are included in the measurement.
  • the packet error rate i. how many packets per time unit arrive undisturbed at the receiver. Or in other words, it checks how many repetitions were necessary to transmit the packets / time unit.
  • a feedback of the respective remote station H is necessary. If the measurement is located at the receiver H, an adjustment between transmitter FG and receiver H is necessary only for acyclic data transmission. Based on these two measurements, it is possible to approximate the distance between the measuring device and the evaluation unit.
  • the wireless module BT always transmits with the lowest possible power and thus provides the measuring function with the highest possible power output from the
  • Measurement performance increased, for example by increasing the measurement rate, measurement accuracy, further calculation such as averaging, clock rate of participating computing units,
  • a synchronization of the wireless module BT with the function module M does not take place. In the optimal case, this is not necessary either, since sufficient power is available for both.
  • the security is increased if the field device FG does not transmit with maximum possible power, but with minimum required power, since then the "operating radius" of the field device FG is limited to the radio transmission.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Health & Medical Sciences (AREA)
  • Computing Systems (AREA)
  • General Health & Medical Sciences (AREA)
  • Medical Informatics (AREA)
  • Arrangements For Transmission Of Measured Signals (AREA)

Abstract

L'invention concerne un procédé d'amélioration de la puissance de mesure d'un appareil de terrain (FG) de l'automatisation de processus, l'appareil de terrain (FG) comportant au moins un module sans fil (BT) et au moins un module fonctionnel (M) pour détecter une grandeur de mesure, l'appareil de terrain (FG) étant alimenté en énergie au moyen d'un bus à deux conducteurs (4). La puissance d'émission et/ou de réception du module sans fil (BT) est adaptée en fonction de paramètres environnementaux. L'invention concerne également un appareil de terrain (FG) destiné à la mise en oeuvre d'un tel procédé.
PCT/EP2017/071343 2016-09-19 2017-08-24 Adaptation de la puissance d'émission et/ou de réception dans un appareil de terrain WO2018050422A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102016117624.9A DE102016117624A1 (de) 2016-09-19 2016-09-19 Verfahren zur Verbesserung der Messleistung eines Feldgeräts sowie Feldgerät
DE102016117624.9 2016-09-19

Publications (1)

Publication Number Publication Date
WO2018050422A1 true WO2018050422A1 (fr) 2018-03-22

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2017/071343 WO2018050422A1 (fr) 2016-09-19 2017-08-24 Adaptation de la puissance d'émission et/ou de réception dans un appareil de terrain

Country Status (2)

Country Link
DE (1) DE102016117624A1 (fr)
WO (1) WO2018050422A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102018122014A1 (de) * 2018-09-10 2020-03-12 Endress + Hauser Flowtec Ag Meßgeräte-System sowie damit gebildete Meßanordnung

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102023106173B3 (de) 2023-03-13 2024-05-02 Vega Grieshaber Kg Feldgerät mit mehreren Modulen zur drahtlosen Kommunikation von Daten

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050152321A1 (en) * 2003-10-03 2005-07-14 Thomas Maufer Systems and methods for autonomously and dynamically optimizing transmission power in a wireless network
US20060290328A1 (en) * 2005-06-27 2006-12-28 Orth Kelly M Field device with dynamically adjustable power consumption radio frequency communication
US7262693B2 (en) 2004-06-28 2007-08-28 Rosemount Inc. Process field device with radio frequency communication
US20090168677A1 (en) * 2007-12-27 2009-07-02 D&S Technology Co., Ltd. Method of Minimizing Electric Power Consumption In Wireless Sensor Network
KR20140137750A (ko) * 2013-05-23 2014-12-03 경기대학교 산학협력단 무선 바디 센서 디바이스 및 이의 전송 파워 제어 방법

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Publication number Priority date Publication date Assignee Title
EP3936950A3 (fr) 2014-03-28 2022-05-11 Rosemount Inc. Émetteur de variable de processus avec émetteur-récepteur sans fil alimenté par boucle
DE102015115273A1 (de) 2015-09-10 2017-03-16 Endress+Hauser Gmbh+Co. Kg Elektronische Schaltung zum autarken Versorgen eines ersten und zweiten Moduls eines Feldgeräts, Feldgerät und entsprechendes Verfahren

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050152321A1 (en) * 2003-10-03 2005-07-14 Thomas Maufer Systems and methods for autonomously and dynamically optimizing transmission power in a wireless network
US7262693B2 (en) 2004-06-28 2007-08-28 Rosemount Inc. Process field device with radio frequency communication
US20060290328A1 (en) * 2005-06-27 2006-12-28 Orth Kelly M Field device with dynamically adjustable power consumption radio frequency communication
US20090168677A1 (en) * 2007-12-27 2009-07-02 D&S Technology Co., Ltd. Method of Minimizing Electric Power Consumption In Wireless Sensor Network
KR20140137750A (ko) * 2013-05-23 2014-12-03 경기대학교 산학협력단 무선 바디 센서 디바이스 및 이의 전송 파워 제어 방법

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Title
"Draft Standard for ; P802-15-1a_D5", IEEE DRAFT; P802-15-1A_D5, IEEE-SA, PISCATAWAY, NJ USA, vol. 802.15, no. D5, 7 June 2004 (2004-06-07), pages 1 - 699, XP017646962 *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102018122014A1 (de) * 2018-09-10 2020-03-12 Endress + Hauser Flowtec Ag Meßgeräte-System sowie damit gebildete Meßanordnung
WO2020052892A1 (fr) 2018-09-10 2020-03-19 Endress+Hauser Flowtec Ag Système d'appareils de mesure et agencement de mesure constitué dudit système
US12055428B2 (en) 2018-09-10 2024-08-06 Endress+Hauser Flowtec Ag Measuring-device system and measuring assembly formed therewith

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Publication number Publication date
DE102016117624A1 (de) 2018-03-22

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