EP0432101A1 - Multiplex-Messvorrichtung mit einer Vielzahl von Sensoren - Google Patents

Multiplex-Messvorrichtung mit einer Vielzahl von Sensoren Download PDF

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Publication number
EP0432101A1
EP0432101A1 EP90810943A EP90810943A EP0432101A1 EP 0432101 A1 EP0432101 A1 EP 0432101A1 EP 90810943 A EP90810943 A EP 90810943A EP 90810943 A EP90810943 A EP 90810943A EP 0432101 A1 EP0432101 A1 EP 0432101A1
Authority
EP
European Patent Office
Prior art keywords
sensors
supply
sensor
multiplexing
conductors
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.)
Granted
Application number
EP90810943A
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English (en)
French (fr)
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EP0432101B1 (de
Inventor
Daniel Hobmaier
José Barros
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.)
Baumer Electric AG
Original Assignee
EUCRON SA
EUCRON SA
Baumer Electric AG
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Publication of EP0432101A1 publication Critical patent/EP0432101A1/de
Application granted granted Critical
Publication of EP0432101B1 publication Critical patent/EP0432101B1/de
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    • G—PHYSICS
    • G08—SIGNALLING
    • G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
    • G08C15/00—Arrangements characterised by the use of multiplexing for the transmission of a plurality of signals over a common path
    • G08C15/06—Arrangements characterised by the use of multiplexing for the transmission of a plurality of signals over a common path successively, i.e. using time division
    • G—PHYSICS
    • G08—SIGNALLING
    • G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
    • G08C19/00—Electric signal transmission systems
    • G08C19/38—Electric signal transmission systems using dynamo-electric devices

Definitions

  • the present invention relates to a measuring device comprising two or more sensors for one or more quantities to be measured, these sensors being arranged to be connected to an electrical power source and to supply, on output conductors, signals depending on the quantity to be measured, the device further comprising devices for transmitting and processing the sensor output signals.
  • the invention applies more particularly to a device for indicating the absolute angular position of a shaft, comprising position sensors with a rotary member, the rotary member of a first sensor being mechanically coupled with said shaft, and the rotary members of the other sensor or sensors being successively coupled to that of the first sensor by means of gears, these sensors being arranged to be supplied by a sinusoidal or pulse voltage, and to provide output signals as a function of the angular position of their rotating organ.
  • the sensors In such devices, the sensors must be connected, on the one hand, to a power source and, on the other hand, to a device for processing their output signals.
  • these output signals appear at the terminals of two phases and therefore require up to four conductors per sensor for their transmission to the processing device generally located at a certain distance. sensors.
  • the number of sensors used depends on the working field of the device, i.e. the maximum number of revolutions of the input shaft that the device allows to indicate, so that a large number of connecting conductors is often necessary, which in practice is a significant drawback.
  • gears with high reduction ratio can be used between the various sensors, so as to reduce the number of sensors required for a given field of work.
  • this solution requires very precise sensors and gears, and therefore leads to relatively high cost prices of the entire device.
  • the invention aims to provide a device of the type mentioned at the start, in which the number of connecting conductors between the sensors and a signal processing device and a power supply device can be substantially reduced, while also making it possible to reduce, in some cases significantly, the cost price of the entire device.
  • the device comprises a supply and multiplexing assembly connected to said sensors and connected, moreover, on the one hand by means of a number of conductors at least approximately equal to that of said output conductors from a single sensor, to the signal processing device and, on the other hand, to a multiplexing supply and control device.
  • the number of connecting conductors thus becomes independent of the number of sensors.
  • the number of sensors can, for example, be increased so as to allow the use of lower reduction ratios, or more generally fewer teeth, and therefore significantly less expensive gears.
  • the first sensor directly coupled to the input shaft whose position we want to measure angular
  • the other sensors used to indicate the number of complete revolutions of the shaft between a starting position and a final position, needing only sufficient precision to determine this number of revolutions, demanding precision which decreases with the reduction ratio used.
  • very economical structure sensors can be constructed, for example according to the principle of varying the coupling between a primary winding and secondary windings in phase quadrature, using a passive mobile member, sensors which are capable of providing output signals of the same format as that of inductive sensors of the resolver type which are significantly more expensive.
  • the addressing of the various sensors for the multiplexing is carried out in an extremely simple manner by means of coding at the supply voltage, not requiring as well as the two supply conductors for the transmission of the addressing command.
  • Different preferred embodiments of the present device are described in claims 2 to 6.
  • an input shaft 1 the absolute angular position of which is to be indicated, that is to say the position from a starting position, including the number of complete revolutions carried out between these positions, is coupled mechanically with a first position sensor C1 which is, in this case, by a resolver.
  • This sensor C1 is supplied by two conductors designated as a whole by MC1 and provides output signals on four conductors designated as a whole by SC1.
  • Fig. 1 shows, moreover, by way of nonlimiting example, three other sensors C2, C3 and C4 which could also be resolvers but which are preferably constituted by inductive sensors with a passive movable member supplying output signals same format as a resolver and therefore able to be processed by the same converter device.
  • the rotary members of these sensors C1 to C4, mounted on respective axes 2,3,4,5, are successively coupled, that is to say each with that of the previous sensor, by means of gears, for example d reduction gears such as 6.7 between C1 and C2, 8.9 between C2 and C3, and 10.11 between C3 and C4.
  • Their reduction ratio can be 16: 1, for example, which makes it possible to produce these gears in a very economical way compared to gears having, for example, ratios of 100: 1, as usually used in such a device.
  • the supply conductors of the sensors C2 to C4 and the conductors connecting their output terminals to a supply and multiplexing assembly 12 are designated, respectively, by MC2, MC3, MC4, and SC2, SC3, SC4, in a similar manner to those of sensor C1.
  • the power supply and multiplexing assembly 12 is installed near the sensors, for example on a machine such as an industrial robot, and it is connected to a signal processing device represented schematically by the blocks 13, 14, thus than to a multiplexing supply and control device represented by blocks 15, 16, 17.
  • a signal processing device represented schematically by the blocks 13, 14, thus than to a multiplexing supply and control device represented by blocks 15, 16, 17.
  • this connection is made, on the one hand, by four conductors S1, S2, S3, S4 and, on the other hand, by two conductors M1, M2, therefore by six conductors in total.
  • the signals appearing on conductors S1 to S4 are first processed in block 13, essentially constituted, in the illustrated case, by an analog-digital R / D converter, to transform analog signals of resolver format into digital signals, which will then be processed in an operating device 14 in order to determine the angular position of the input shaft and / or the speed of rotation of this shaft.
  • a supply current source for the sensors and the assembly 12 is indicated by block 15. It supplies, via two conductors R1, R2, a sinusoidal or pulse voltage to a coding circuit 16 connected by the conductors M1, M2 to set 12.
  • the selection of the sensors C1 to C4 for the transmission of the corresponding output signals, in multiplex, to the device 13, is carried out under the control of addressing signals supplied on conductors A1, A2, A3, A4, as indicated schematically FIG. 1, by a control device 17 also connected to the operating device 14.
  • Fig. 2 shows the diagram of the circuit 16 according to an exemplary embodiment, making it possible to superimpose on the supply voltage applied between R1 and R2 different offset voltages defined respectively by the level of DC voltages selectively applied to the conductors A1 to A4.
  • the superimposed DC voltages determined, for example, by the choice of resistors r1 to r6 in FIG. 2 preferably have a value substantially smaller than the supply voltage but must, of course, be sufficient to allow easy discrimination. It should also be noted that the potentials of M1 and M2 are floating.
  • Fig. 3 is a simplified diagram of a power supply and multiplexing assembly 12 used in the device of FIG. 1.
  • the voltage applied via conductors M1 and M2 is, on the one hand, rectified and filtered by circuits 18 to 21, in order to obtain a DC supply voltage Vcc, in particular for supplying analog multiplexers represented by a block 22.
  • the voltage on M1, M2 is, moreover, supplied to the various sensors via the conductors MC1 to MC4, a filtering being provided to eliminate the DC component by means of a high-pass filter 23 which, in the present example , can be mounted downstream of the power supply of the first sensor C1.
  • the voltage on M1, M2 is filtered by a low-pass filter 24 to apply the continuous offset voltage to a level discriminator 25 shown diagrammatically in FIG. 3.
  • This discriminator supplies to addressing inputs A 1 ′, A 2 ′, A 3 ′, A 4 ′ a corresponding addressing signal which causes the output signals of the respective sensor to appear on the transmission conductors S1 to S4 .
  • the detection of the DC offset voltage is preferably carried out in the interval between two consecutive pulses.
  • the multiplexing according to the invention practically does not complicate the overall structure of the present device, since it allows the use of a single analog-digital converter or other device for signal processing.
  • the use of a minimum of connection conductors, and, in particular in the case described by way of example, the possibility of using simple and more economical sensors, and gears with relatively low number of teeth, provides decisive technical and economic advantages.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
  • Transmission And Conversion Of Sensor Element Output (AREA)
  • Arrangements For Transmission Of Measured Signals (AREA)
  • Testing Or Calibration Of Command Recording Devices (AREA)
  • Length Measuring Devices With Unspecified Measuring Means (AREA)
EP90810943A 1989-12-06 1990-12-04 Multiplex-Messvorrichtung mit einer Vielzahl von Sensoren Expired - Lifetime EP0432101B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH4381/89A CH681655A5 (de) 1989-12-06 1989-12-06
CH4381/89 1989-12-06

Publications (2)

Publication Number Publication Date
EP0432101A1 true EP0432101A1 (de) 1991-06-12
EP0432101B1 EP0432101B1 (de) 1995-03-08

Family

ID=4275054

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Application Number Title Priority Date Filing Date
EP90810943A Expired - Lifetime EP0432101B1 (de) 1989-12-06 1990-12-04 Multiplex-Messvorrichtung mit einer Vielzahl von Sensoren

Country Status (7)

Country Link
US (1) US5211063A (de)
EP (1) EP0432101B1 (de)
JP (1) JPH03225217A (de)
CH (1) CH681655A5 (de)
CS (1) CS603790A3 (de)
DE (1) DE69017607T2 (de)
PL (1) PL288080A1 (de)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0548439A1 (de) * 1991-12-18 1993-06-30 Endress + Hauser Flowtec AG Schaltungsanordnung zum Betrieb mehrerer magnetisch-induktiver Durchflussaufnehmer an einer einzigen Auswerteelektronik
DE4303235A1 (en) * 1992-02-05 1993-08-12 Asm Automation Sensorik Messte Sensor for absolute rotational angle measurement over several revolutions - has resolver as fine angle sensor element connected to rotating shaft to be monitored and coarse angle sensor elements each inductively coupled across reduction drive
ES2125804A1 (es) * 1996-08-21 1999-03-01 Inelcom Ingenieria Electronica Dispositivo telecomandado de conexion de un equipo de medida de señales electricas con diferentes puntos distribuidos.
US8540942B2 (en) 2009-01-14 2013-09-24 David Kyle Pierce Continuous methods for treating liquids and manufacturing certain constituents (e.g., nanoparticles) in liquids, apparatuses and nanoparticles and nanoparticle/liquid solution(s) therefrom
US9067263B2 (en) 2009-01-15 2015-06-30 Gr Intellectual Reserve, Llc Continuous, semicontinuous and batch methods for treating liquids and manufacturing certain constituents (e.g., nanoparticles) in liquids, apparatuses and nanoparticles and nanoparticle/liquid solution(s) and colloids resulting therefrom
US9387452B2 (en) 2009-01-14 2016-07-12 Gr Intellectual Reserve, Llc. Continuous methods for treating liquids and manufacturing certain constituents (e.g., nanoparticles) in liquids, apparatuses and nanoparticles and nanoparticle/liquid solution(s) resulting therefrom
US9743672B2 (en) 2007-07-11 2017-08-29 Gr Intellectual Reserve, Llc Continuous methods for treating liquids and manufacturing certain constituents (e.g., nanoparticles) in liquids, apparatuses and nanoparticles and nanoparticle/liquid solution(s) resulting therefrom

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4429998C2 (de) * 1994-08-25 2002-07-11 Kostal Leopold Gmbh & Co Kg Anordnung zur Positionssteuerung von Elektromotoren
DE19507180A1 (de) * 1995-03-02 1996-09-05 Bosch Gmbh Robert Weggeber zur Erfassung des Verstellweges eines Stellglieds
US6020830A (en) * 1997-10-14 2000-02-01 The United States Of America As Represented By The Secretary Of The Navy Telemetry system using broadband correlation techniques
US6697763B1 (en) 1999-12-07 2004-02-24 Pei Electronics, Inc. Measurement module and system for monitoring the status of armored vehicle electronic components
DE10345059B4 (de) * 2003-09-26 2015-03-19 Dspace Digital Signal Processing And Control Engineering Gmbh Schaltungsanordnung zum Verbinden von Signalanschlüssen
EP2806967B1 (de) * 2012-01-27 2016-01-27 Outotec (Finland) Oy Verfahren zum betrieb eines brennstoffbefeuerten reaktors
US9464918B2 (en) 2014-05-30 2016-10-11 Goodrich Corporation Sensor wire count reduction system

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GB1214168A (en) * 1967-02-27 1970-12-02 Giddings & Lewis Apparatus for digitally signalling absolute position
AT341036B (de) * 1975-08-04 1978-01-10 Neumann Heinz Schaltungsanordnung zur fernsteuerung mehrerer verbraucher
US4207505A (en) * 1977-05-09 1980-06-10 Sundstrand Corporation Measuring system
US4430576A (en) * 1981-11-05 1984-02-07 Rick Fowler Remote load selector circuit and method
EP0254142A2 (de) * 1986-07-24 1988-01-27 NICOTRA SISTEMI S.p.A. Ein- oder Mehrfachtransduktor zum Messen einer oder mehrerer physikalischen oder elektrischen Grössen

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1214168A (en) * 1967-02-27 1970-12-02 Giddings & Lewis Apparatus for digitally signalling absolute position
AT341036B (de) * 1975-08-04 1978-01-10 Neumann Heinz Schaltungsanordnung zur fernsteuerung mehrerer verbraucher
US4207505A (en) * 1977-05-09 1980-06-10 Sundstrand Corporation Measuring system
US4430576A (en) * 1981-11-05 1984-02-07 Rick Fowler Remote load selector circuit and method
EP0254142A2 (de) * 1986-07-24 1988-01-27 NICOTRA SISTEMI S.p.A. Ein- oder Mehrfachtransduktor zum Messen einer oder mehrerer physikalischen oder elektrischen Grössen

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0548439A1 (de) * 1991-12-18 1993-06-30 Endress + Hauser Flowtec AG Schaltungsanordnung zum Betrieb mehrerer magnetisch-induktiver Durchflussaufnehmer an einer einzigen Auswerteelektronik
US5402685A (en) * 1991-12-18 1995-04-04 Endress & Hauser Flowtec Ag Circuit arrangement for operating a plurality of magnetic flow sensors with a single electronic evaluating unit
DE4303235A1 (en) * 1992-02-05 1993-08-12 Asm Automation Sensorik Messte Sensor for absolute rotational angle measurement over several revolutions - has resolver as fine angle sensor element connected to rotating shaft to be monitored and coarse angle sensor elements each inductively coupled across reduction drive
ES2125804A1 (es) * 1996-08-21 1999-03-01 Inelcom Ingenieria Electronica Dispositivo telecomandado de conexion de un equipo de medida de señales electricas con diferentes puntos distribuidos.
US9743672B2 (en) 2007-07-11 2017-08-29 Gr Intellectual Reserve, Llc Continuous methods for treating liquids and manufacturing certain constituents (e.g., nanoparticles) in liquids, apparatuses and nanoparticles and nanoparticle/liquid solution(s) resulting therefrom
US10092007B2 (en) 2007-07-11 2018-10-09 Clene Nanomedicine, Inc. Continuous methods for treating liquids and manufacturing certain constituents (e.g., nanoparticles) in liquids, apparatuses and nanoparticles and nanoparticle/liquid solution(s) resulting therefrom
US11000042B2 (en) 2007-07-11 2021-05-11 Clene Nanomedicine, Inc. Continuous methods for treating liquids and manufacturing certain constituents (e.g., nanoparticles) in liquids, apparatuses and nanoparticles and nanoparticle/liquid solution(s) resulting therefrom
US12415218B2 (en) 2007-07-11 2025-09-16 Ciene Nanomedicine, Inc. Continuous methods for treating liquids and manufacturing certain constituents (e.g., nanoparticles) in liquids, apparatuses and nanoparticles and nanoparticle/liquid solution(s) resulting therefrom
US8540942B2 (en) 2009-01-14 2013-09-24 David Kyle Pierce Continuous methods for treating liquids and manufacturing certain constituents (e.g., nanoparticles) in liquids, apparatuses and nanoparticles and nanoparticle/liquid solution(s) therefrom
US9387452B2 (en) 2009-01-14 2016-07-12 Gr Intellectual Reserve, Llc. Continuous methods for treating liquids and manufacturing certain constituents (e.g., nanoparticles) in liquids, apparatuses and nanoparticles and nanoparticle/liquid solution(s) resulting therefrom
US10441608B2 (en) 2009-01-14 2019-10-15 Clene Nanomedicine, Inc. Continuous methods for treating liquids and manufacturing certain constituents (e.g., nanoparticles) in liquids, apparatuses and nanoparticles and nanoparticle/liquid solution(s) resulting therefrom
US9067263B2 (en) 2009-01-15 2015-06-30 Gr Intellectual Reserve, Llc Continuous, semicontinuous and batch methods for treating liquids and manufacturing certain constituents (e.g., nanoparticles) in liquids, apparatuses and nanoparticles and nanoparticle/liquid solution(s) and colloids resulting therefrom

Also Published As

Publication number Publication date
EP0432101B1 (de) 1995-03-08
PL288080A1 (en) 1991-12-02
DE69017607T2 (de) 1995-12-07
JPH03225217A (ja) 1991-10-04
DE69017607D1 (de) 1995-04-13
CH681655A5 (de) 1993-04-30
US5211063A (en) 1993-05-18
CS603790A3 (en) 1992-08-12

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