WO1995023395A1 - Unite de production de signaux, par exemple un capteur de temperature, destinee a etre couplee a un reseau de transmission de signaux - Google Patents

Unite de production de signaux, par exemple un capteur de temperature, destinee a etre couplee a un reseau de transmission de signaux Download PDF

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Publication number
WO1995023395A1
WO1995023395A1 PCT/DK1995/000083 DK9500083W WO9523395A1 WO 1995023395 A1 WO1995023395 A1 WO 1995023395A1 DK 9500083 W DK9500083 W DK 9500083W WO 9523395 A1 WO9523395 A1 WO 9523395A1
Authority
WO
WIPO (PCT)
Prior art keywords
signal
network
unit
sensor
temperature sensor
Prior art date
Application number
PCT/DK1995/000083
Other languages
English (en)
Inventor
Bent H. Jensen
Bjørn SAHL
Peter Nyegaard Jensen
Original Assignee
Lanng & Stelman A/S
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 Lanng & Stelman A/S filed Critical Lanng & Stelman A/S
Priority to AU18069/95A priority Critical patent/AU1806995A/en
Publication of WO1995023395A1 publication Critical patent/WO1995023395A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/02—Details
    • H04L12/10—Current supply arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/40—Bus networks

Definitions

  • a signal producing unit e.g.:.a temperature sensor, to be coupled to a signal network.
  • the present invention relates to a signal producing unit adapted for operative coupling to a signal network such as a so-called fieldbus network.
  • a signal network such as a so-called fieldbus network.
  • a signal network can be used for establishing a selective signal connection between one or more control units and various types of measuring and adjustment systems.
  • the signal network is a pure signal carrier, which is used for traditional communication, and which may sometimes be electrically dead and sometimes very much alive, e.g. with traffic of addressing signals from the control unit and responding reporting signals from various measuring units and other sensors etc.
  • the invention has its immediate background in the ship area, particularly in connection with large ships, where there is a need for measuring and remote reporting of different values, e.g. for temperature or pressure, with reference to places far away from the "electrically civilized" areas of the ship, i.e. at places to which it is expensive to establish cable connections.
  • it has been found possible to operate with a sufficient current supply through a tapping of energy directly from the signal network, i.e. directly from the occurring signal voltages.
  • the sig ⁇ nals on the network will originate from conventionally current supplied control units and signal generators, and this provides a basis for the application of a num ⁇ ber of units which, with a very low current consumption, may be current supplied by the signal energy, inasfar as these units may exhibit a storage capacity sufficient for currently collecting a sufficient energy without the signals being unduly attenuated.
  • This collected energy of the signal units will be used, whenever a signal unit is actuated to transmit signals to the control unit, to provide, briefly, suf ⁇ ficient current for driving the signal network with all its associated units.
  • the units should be provided with all required circuitry, and preferably they are also, physi ⁇ cally, designed as self-contained units, e.g. as a tem ⁇ perature sensor with both sensing equipment and electro ⁇ nics collectively housed in an apparatus box for plug connection with the laid-out signal cable. Thus, it will be sufficient to lay out this cable only.
  • the common apparatus box may typically be a standard DIN 43729 sensor housing, such that the signal unit is mechani ⁇ cally compatible with existing equipment; it will be appreciated that the advantages of the system are not obtained with associated counterdrawbacks, such as phy ⁇ sically enlarged units.
  • the single signal units will collect, by them ⁇ selves, the relevant measuring values and convert them into digital signals and transmit them to the signal network at request from the superior control unit.
  • the invention will comprise the entirety of interface to sensor, A/D converter, micro ⁇ processor, communication interface and voltage supply.
  • Associated software may comprise a protocol and imple ⁇ mentation thereof in the sensor.
  • the protocol may exhibit facilities not only for the transmission of digital measuring values, but also for the set-up of alarm limits (max./min. level) for event control of the transfer of the measuring values. Moreover, the protocol may enable a software controlled adjustment of the sensor, e.g. for span, zero point, correction of linearity, etc.
  • the invention may be applied in any relevant con ⁇ nection, but in particular, as mentioned, where it is expensive or for other reasons undesirable to arrange for external voltage supply.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Arrangements For Transmission Of Measured Signals (AREA)

Abstract

Unité de production de signaux, par exemple un capteur de température, logée dans un boîtier pour capteur conjointement avec un dispositif permettant à ladite unité d'être reliée de façon opérante à un réseau de bus de terrain sans aucun autre raccordement, c'est-à-dire, sans un quelconque montage de câble destiné à l'alimentation en énergie. Le boîtier possède une capacité de stockage d'énergie, laquelle est généralement prise en petites quantités à partir de l'énergie même des signaux produite sur le réseau de transmission de signaux, ainsi que des moyens destinés à signaler brièvement la valeur de mesure pertinente à la demande de l'unité centrale de commande.
PCT/DK1995/000083 1994-02-24 1995-02-24 Unite de production de signaux, par exemple un capteur de temperature, destinee a etre couplee a un reseau de transmission de signaux WO1995023395A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU18069/95A AU1806995A (en) 1994-02-24 1995-02-24 A signal producing unit, e.g. a temperature sensor, to be coupled to a signal network

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DK0229/94 1994-02-24
DK22994 1994-02-24

Publications (1)

Publication Number Publication Date
WO1995023395A1 true WO1995023395A1 (fr) 1995-08-31

Family

ID=8091187

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DK1995/000083 WO1995023395A1 (fr) 1994-02-24 1995-02-24 Unite de production de signaux, par exemple un capteur de temperature, destinee a etre couplee a un reseau de transmission de signaux

Country Status (2)

Country Link
AU (1) AU1806995A (fr)
WO (1) WO1995023395A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4222113A (en) * 1977-12-14 1980-09-09 Danfoss A/S Transmit-receive switching unit
US4949359A (en) * 1987-09-09 1990-08-14 Willemin Electronis S.A. Method for the electronic transmission of data and installation for carrying out this method
US5032819A (en) * 1988-10-24 1991-07-16 Murata Mfg. Co., Ltd. Data communications system

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4222113A (en) * 1977-12-14 1980-09-09 Danfoss A/S Transmit-receive switching unit
US4949359A (en) * 1987-09-09 1990-08-14 Willemin Electronis S.A. Method for the electronic transmission of data and installation for carrying out this method
US5032819A (en) * 1988-10-24 1991-07-16 Murata Mfg. Co., Ltd. Data communications system

Also Published As

Publication number Publication date
AU1806995A (en) 1995-09-11

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