EP1048934A3 - Dual-wire-type detector - Google Patents

Dual-wire-type detector Download PDF

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Publication number
EP1048934A3
EP1048934A3 EP00106483A EP00106483A EP1048934A3 EP 1048934 A3 EP1048934 A3 EP 1048934A3 EP 00106483 A EP00106483 A EP 00106483A EP 00106483 A EP00106483 A EP 00106483A EP 1048934 A3 EP1048934 A3 EP 1048934A3
Authority
EP
European Patent Office
Prior art keywords
wire
lines
wire sensors
properties
series
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Withdrawn
Application number
EP00106483A
Other languages
German (de)
French (fr)
Other versions
EP1048934A2 (en
Inventor
Lothar Dipl.-Phys. Blossfeld
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
TDK Micronas GmbH
Original Assignee
TDK Micronas GmbH
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 TDK Micronas GmbH filed Critical TDK Micronas GmbH
Publication of EP1048934A2 publication Critical patent/EP1048934A2/en
Publication of EP1048934A3 publication Critical patent/EP1048934A3/en
Withdrawn legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
    • G08C19/00—Electric signal transmission systems
    • G08C19/02—Electric signal transmission systems in which the signal transmitted is magnitude of current or voltage

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Arrangements For Transmission Of Measured Signals (AREA)

Abstract

Zweidrahtsensoren zur Messung physikalischer Größen haben nur zwei Anschlüsse (A1, A2), die sowohl der Stromversorgung als auch der Weiterleitung der Messsignale dienen. Weil Zweidrahtsensoren aber die Eigenschaften gesteuerter Stromquellen haben, können sie nur parallel geschaltet werden. Für eine Parallelschaltung aus n an unterschiedlichen Orten angeordneten Zweidrahtsensoren sind daher zwei n Leitungen erforderlich. Um die Anzahl der Leitungen zu reduzieren ist im Zweidrahtsensor eine Endstufe (W) vorgesehen, die eine Ausgangsspannung (UA) erzeugt, welche ein Maß für die von einem Messsensor (S) gemessenen pysikalischen Größe und stets größer als ein vorgebbares Referenzspannungssignal (Uref) ist. Weil der erfindungsgemäße Zweidrahtsensor deshalb die Eigenschaften einer Spannungsquelle hat, lassen sich mehrere in Serie schalten. Es sind daher auch bei einer Serienschaltung mehrerer Zweidrahtsensoren nur zwei Leitungen erforderlich.

Figure 00000001
Two-wire sensors for measuring physical quantities have only two connections (A1, A2), which are used both for the power supply and for the transmission of the measurement signals. However, because two-wire sensors have the properties of controlled current sources, they can only be connected in parallel. For a parallel connection of n two-wire sensors arranged at different locations, two n lines are therefore required. In order to reduce the number of lines, an output stage (W) is provided in the two-wire sensor that generates an output voltage (UA), which is a measure of the physical size measured by a measuring sensor (S) and is always larger than a predefinable reference voltage signal (Uref) , Because the two-wire sensor according to the invention therefore has the properties of a voltage source, several can be connected in series. Therefore, only two lines are required even if several two-wire sensors are connected in series.
Figure 00000001
EP00106483A 1999-04-27 2000-03-25 Dual-wire-type detector Withdrawn EP1048934A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19919084A DE19919084C2 (en) 1999-04-27 1999-04-27 Two-wire sensor device
DE19919084 1999-04-27

Publications (2)

Publication Number Publication Date
EP1048934A2 EP1048934A2 (en) 2000-11-02
EP1048934A3 true EP1048934A3 (en) 2003-12-10

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP00106483A Withdrawn EP1048934A3 (en) 1999-04-27 2000-03-25 Dual-wire-type detector

Country Status (3)

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US (1) US6437581B1 (en)
EP (1) EP1048934A3 (en)
DE (1) DE19919084C2 (en)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10145520B4 (en) * 2001-09-14 2004-09-09 Vega Grieshaber Kg Circuit arrangement for the voltage supply of a two-wire sensor
DE10146204A1 (en) * 2001-09-19 2003-04-10 Grieshaber Vega Kg Circuit arrangement for the voltage supply of a two-wire sensor
US7252009B2 (en) * 2004-08-27 2007-08-07 Ashcroft-Nagano, Inc. System and method for pressure measurement
US7100455B2 (en) * 2004-08-27 2006-09-05 Dresser-Nagano, Inc. System and method for pressure measurement
US7433267B2 (en) * 2004-12-13 2008-10-07 Ssi Technologies, Inc. Two wire resistive sensor
US7719411B2 (en) * 2007-06-12 2010-05-18 Robert Bosch Gmbh Method and system of transmitting a plurality of movement parameters of a vehicle via a two-wire interface
US8054071B2 (en) 2008-03-06 2011-11-08 Allegro Microsystems, Inc. Two-terminal linear sensor
US7969041B2 (en) * 2009-02-03 2011-06-28 Infineon Technologies Ag System where the number of conductors equals the number of sensors and each of the sensors receives voltages via a different set of two conductors and provides data via the different set of two conductors
JP4830058B2 (en) * 2009-10-21 2011-12-07 旭化成エレクトロニクス株式会社 2-wire transmitter
US9464880B2 (en) * 2010-07-15 2016-10-11 Metrix Instrument Co., Lp Dual wire dynamic proximity transducer interface for use in proximity transducer system and proximity transducer system including the same
DE102012219501A1 (en) * 2012-10-25 2014-04-30 BSH Bosch und Siemens Hausgeräte GmbH Sensor arrangement for a household appliance and a household appliance with such a sensor arrangement
DE102017119575A1 (en) 2017-08-25 2019-02-28 Tdk-Micronas Gmbh Method for programming a two-wire sensor and a programmable two-wire sensor
FR3081560B1 (en) * 2018-05-22 2020-06-05 Autovib ELECTRONIC DEVICE FOR MEASURING A DETERMINED SIZE HAVING A TWO WIRE INTERFACE.

Citations (3)

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Publication number Priority date Publication date Assignee Title
DE3519709A1 (en) * 1984-06-04 1985-12-05 Yamatake-Honeywell Co. Ltd., Tokio/Tokyo Dialog method and device for carrying out this method
US5790046A (en) * 1994-06-30 1998-08-04 Deutsche Itt Industreis Gmbh Sensor with a programmable switching threshold
US5793754A (en) * 1996-03-29 1998-08-11 Eurotherm Controls, Inc. Two-way, two-wire analog/digital communication system

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Publication number Priority date Publication date Assignee Title
DE6912918U (en) 1969-03-25 1969-09-18 Varta Ag DEVICE FOR THE CONTINUOUS PRODUCTION OF NEGATIVE ACTIVE MASS FOR ALKALINE ACCUMULATORS
FR2447540A1 (en) * 1979-01-26 1980-08-22 Jaeger ANALOGUE MEASUREMENT MEASUREMENT CIRCUIT WITH REMOTE INDICATION
US4374333A (en) * 1980-05-27 1983-02-15 Sprague Electric Company Two terminal Hall-sensor
US5049878A (en) * 1981-05-13 1991-09-17 Drexelbrook Engineering Company Two-wire compensated level measuring instrument
EP0337396B1 (en) * 1988-04-11 1996-07-17 Omron Corporation Two-wire detection system having self-diagnosis means
DE3828428C1 (en) * 1988-08-22 1989-11-02 Honeywell-Schild Ag, Biel, Ch Voltage supply for proximity switches
US4939455A (en) * 1988-09-02 1990-07-03 Hamilton Standard Controls, Inc. Sensor having two-wire connection to load
FR2668257B1 (en) * 1990-10-18 1994-05-13 Telemecanique TWO WIRE TYPE DETECTOR WITH REGULATED VOLTAGE.
US5488307A (en) * 1993-12-22 1996-01-30 Namco Controls Corporation Sensor interface method and apparatus
US5535243A (en) * 1994-07-13 1996-07-09 Rosemount Inc. Power supply for field mounted transmitter
WO1996004630A1 (en) * 1994-08-03 1996-02-15 Drexelbrook Controls, Inc. High reliability instrument system
DE19723645B4 (en) * 1997-06-05 2006-04-13 Endress + Hauser Gmbh + Co. Kg Arrangement for signal transmission between a donor site and a receiving site

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3519709A1 (en) * 1984-06-04 1985-12-05 Yamatake-Honeywell Co. Ltd., Tokio/Tokyo Dialog method and device for carrying out this method
US5790046A (en) * 1994-06-30 1998-08-04 Deutsche Itt Industreis Gmbh Sensor with a programmable switching threshold
US5793754A (en) * 1996-03-29 1998-08-11 Eurotherm Controls, Inc. Two-way, two-wire analog/digital communication system

Also Published As

Publication number Publication date
EP1048934A2 (en) 2000-11-02
DE19919084C2 (en) 2001-05-31
DE19919084A1 (en) 2000-11-16
US6437581B1 (en) 2002-08-20

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