EP1575013A2 - Capteur avec une sortie pour sortir des données par multiplexage - Google Patents

Capteur avec une sortie pour sortir des données par multiplexage Download PDF

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Publication number
EP1575013A2
EP1575013A2 EP04030561A EP04030561A EP1575013A2 EP 1575013 A2 EP1575013 A2 EP 1575013A2 EP 04030561 A EP04030561 A EP 04030561A EP 04030561 A EP04030561 A EP 04030561A EP 1575013 A2 EP1575013 A2 EP 1575013A2
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EP
European Patent Office
Prior art keywords
lsn
msn
sensor
data words
short data
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
EP04030561A
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German (de)
English (en)
Other versions
EP1575013A3 (fr
EP1575013B1 (fr
Inventor
Hans-Jörg Dipl.-Ing. Fink
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
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TDK Micronas GmbH
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Publication date
Application filed by TDK Micronas GmbH filed Critical TDK Micronas GmbH
Publication of EP1575013A2 publication Critical patent/EP1575013A2/fr
Publication of EP1575013A3 publication Critical patent/EP1575013A3/fr
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Publication of EP1575013B1 publication Critical patent/EP1575013B1/fr
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    • G—PHYSICS
    • G08—SIGNALLING
    • G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
    • G08C19/00—Electric signal transmission systems
    • 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

Definitions

  • Sensors are usually located at the location of the size to be determined. Either this already requires the measuring principle or is used to measure errors and uncertainties keep as small as possible.
  • the measured quantities such as temperature, magnetic field, pressure, Force, flow, level, etc. are in the sensor in physical signals converted, which are then fed to the receiving device.
  • a conversion into electrical signals instead of easily generating, can be transmitted and received, in particular if as a receiver, a processor is provided, which has appropriate interfaces.
  • signals can be analog or digital signals. Digital signals have the advantage over analog signals that they can be used on the Transmission can be disturbed less, however, by an increased Effort on the transmitter and receiver side as well as on the transmission line has to be bought.
  • digital signals often fit better in the Signal landscape of the connected processors, because their signal processing in essential parts are also digital.
  • a disadvantage of the serial data transmission is with longer data words that for the Transmission time required because the transmission rate is relatively slow. Long signal lines can smoothen the pulse edges, resulting in safe Detection requires compared to the processor clock significantly reduced data rate. In the rule is during this time at least the associated data input of the Receiver blocked for other data, in the worst case extends the Blocking on other parts of the processor, which then no example Interruption allows.
  • Another way of transferring data quickly is to transfer the data before the transmission by means of a digital-to-analog converter back into an analog signal discrete values and transmit this signal. This corresponds to one parallel data transmission. On the receiver side can then be out of the signal areas again the data by means of an analog-to-digital converter win back. At first glance, this looks awkward, because you could equal to the original analog output signal of the sensor transmitted. Finds though in the sensor processing of the sensor signal instead, for example, a filtering, Interpolation, compensation, level adjustment, equalization etc., then this is done a lot easier on the digital level, because then the associated parameters and Program steps are retrievable from digital stores and digital processing in with integrated computing devices takes place. There are problems with this type of transmission with high-resolution sensor output signals, because then the disturbances on the Transmission distance comparable or even greater than the step size of the Available signal grid.
  • the solution of the task is based on the knowledge that not all data simultaneously for transmission into an analog signal, a pseudo signal, to be implemented, but only in sections.
  • the resulting analog signals then become one after the other in multiplex mode.
  • On the receiver side are the the transmitted pseudo signals bits compiled correctly, so that the full data word is available for further processing stands.
  • the number of multiplexing sections and the number of multiplexing sections transmitted data is of the respective characteristics of the involved Function units and the expected interference dependent. If the disturbing influence is low, then this allows more discretely distinguishable states than when the Disturbance is high. In the limiting case the disturbing influence is so high that a Multiplex transmission is no longer possible, but each bit transmitted individually must be, but this is again purely sequential operation.
  • the multiplexed data packets must be on the receiver side be reassembled correctly. So there must be a secure association be predetermined, which of the various data packets are each. There are a lot of possibilities for this.
  • a very simple solution is the Marked by short breaks between the related ones Multiplex sections of a single data word and long pauses leading to Differentiation of different data words serve. Here is the order of fixed data packets.
  • a great advantage of the described multiplex transmission is that even high-resolution Sensor signals from the analog-to-digital converters with a lower Bit resolution in the processors can be detected.
  • the first 7 bits, which are the higher or lower digits of the Data word associated with are then stored in a first register.
  • At the second received signal are the 7 bits of the lower or higher order digits of the data word and in a second tab or left blank Positions of the first register are stored correctly.
  • the demand for one High transmission accuracy is the detection of the exact throttle position in an internal combustion engine, called for the setting of a quiet idle is required.
  • the example shows that as a rule the transmission with two steps is sufficient, which simplifies the procedures for marking the two sections. For example, you can choose the available voltage range between Split 0.25V and 4.75V into two 0.25V to 2.25V and 2.75V to 4.75V parts. In One area will then be the higher-ranking places and the other area transferred to lower-ranking bodies.
  • the interference immunity is halved, but has compared to the above example with the transmission of a 10 bit signal still a gain of about 15 times.
  • the definition of the respective data area or its request can also be done by the controller itself by this a load resistance of Transmission line via one of its I / O ports to the VSS or VDD potential on. This switching is via the changed current direction in one corresponding evaluation circuit detected in the sensor output and triggers the transmission of the desired data section.
  • Another way to define the Data packets and, if applicable, their tripping can be monitored via signals on the Supply line VDD or another connection of the sensor done.
  • VDD Supply voltage connection
  • the data does not change in the higher value range, but only the data in the low-order range. In this case it is expedient, as long as only the changes in the low-order data area until the higher-order data area a change results. If the transmission occurs in two control areas, the Marking which data section is currently being transmitted ensures otherwise, another label must ensure this. This method Accelerates the transfer further and reduces the occupancy of the controller.
  • the decimal value 5241 is the output voltage going from 0V to 5V Vout, where the full stroke corresponds to the decimal 16384.
  • the decimal value 5241 results in a voltage value of 1,600 V.
  • Fig. 4 shows schematically the analog output signal Vout for a sensor for Recording of angle values.
  • the angles ⁇ from -60 ° to + 60 ° are ⁇ linearly assigned the voltage values from 0 V to 5 V.
  • FIG. 5 shows in the time diagram the successive transmission of the short data words LSN and MSN of FIG. 1 as different voltage levels Vout of 4.727 V and 1.563 V.
  • a short transition of about 0.2 ms signals the change from the LSN to MSN.
  • the change is triggered in the embodiment in that in Sensor output is detected that the current flow direction on the Transmission line has reversed, which, for example, by switching the Load resistance RL from VSS or GND to VDD is effected.
  • FIG. 6 An example of such an implementation is shown in FIG. 6.
  • a sensor 1 is connected to its Signal output 2 connected to a transmission link 3, the one Load resistance RL, for example, 10 kOhm. That of the Transmission link 3 opposite end of the load resistor is connected to an I / O input a receiver 4, e.g. a controller connected to its output potential optionally switch between VSS and VDD and thus in the sensor 1, the output of the respective short data word as an analog pseudo signal controls.
  • FIG. 7 shows another implementation of the external triggering of the short data words shown schematically.
  • the control now takes place via the supply voltage VDD, which is modulated by the controller 4 in an appropriate manner via the I / O port. Whether an overvoltage and undervoltage +/- ⁇ U is used or different high overvoltages depends only on the detection circuit in the sensor. Of the Load resistance RL in this case is at a fixed potential, e.g. VDD, connected.
  • Fig. 8 shows schematically as a block diagram the functional units of an embodiment for a sensor 1.
  • the actual sensor element 6 delivers its analog measurement signal to an analog-to-digital converter 7.
  • the subsequent processing takes place digitally in the circuit block 8. If this parameter or program instructions needed, then these are brought from a memory 9. There also intermediate results etc. can be stored.
  • the result of the processing is the digital output signal of the block 8, a multi-digit data word, which is ultimately to be transmitted to a receiver, not shown.
  • This data word is split in the circuit block 10 into two short data words MSN and LSN, which are buffered in the registers 11, 12. Via an electronic switching device 13, the content of the two registers is switched by a control device 14 at the correct time to a digital-to-analog converter 15, which converts the short data words MSN and LSN each into an analog pseudo signal which is supplied via an amplifier 16 to an output terminal of the sensor 1 becomes.
  • the required supply lines and control lines and clocks are not shown for the sake of clarity. Whether the individual functional units are realized wholly or partly by means of an adapted circuit or by means of a program is within the scope of the invention.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Arrangements For Transmission Of Measured Signals (AREA)
  • Time-Division Multiplex Systems (AREA)
EP04030561A 2004-02-13 2004-12-23 Capteur avec une sortie pour sortir des données par multiplexage Active EP1575013B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004007486 2004-02-12
DE102004007486A DE102004007486A1 (de) 2004-02-13 2004-02-13 Sensor mit Multiplex-Datenausgang

Publications (3)

Publication Number Publication Date
EP1575013A2 true EP1575013A2 (fr) 2005-09-14
EP1575013A3 EP1575013A3 (fr) 2007-10-31
EP1575013B1 EP1575013B1 (fr) 2010-02-24

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP04030561A Active EP1575013B1 (fr) 2004-02-13 2004-12-23 Capteur avec une sortie pour sortir des données par multiplexage

Country Status (5)

Country Link
US (1) US7319418B2 (fr)
EP (1) EP1575013B1 (fr)
JP (1) JP4745679B2 (fr)
KR (1) KR101089486B1 (fr)
DE (2) DE102004007486A1 (fr)

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DE102007029660B4 (de) * 2007-06-27 2011-06-01 Vega Grieshaber Kg Adaptiver Fehlerzähler für ein drahtloses Feldgerät
DE102007046560A1 (de) * 2007-09-28 2009-04-02 Siemens Ag Feldgerät mit einem Analogausgang
EP2211147B1 (fr) * 2009-01-23 2012-11-28 Micronas GmbH Procédé de contrôle du fonctionnement d'une circuit électrique
IT1397584B1 (it) * 2009-12-18 2013-01-16 Eltek Spa Dispositivo di monitoraggio di una ruota di un veicolo e relativo metodo di comunicazione.
DE102012013072B4 (de) 2012-07-02 2015-01-08 Micronas Gmbh Vorrichtung zur Auswertung eines Magnetfeldes
JP5737327B2 (ja) * 2013-05-08 2015-06-17 株式会社デンソー 通信システム、送信装置、受信装置
WO2014204919A1 (fr) 2013-06-20 2014-12-24 Allegro Microsystems, Llc Système et procédé de réalisation de codage de signal, représentatif d'une région de signature dans une cible, et représentatif d'un sens de rotation
US9634715B2 (en) 2014-02-18 2017-04-25 Allegro Microsystems, Llc Signaling between master and slave components using a shared communication node of the master component
US9787495B2 (en) 2014-02-18 2017-10-10 Allegro Microsystems, Llc Signaling between master and slave components using a shared communication node of the master component
US9851416B2 (en) 2014-07-22 2017-12-26 Allegro Microsystems, Llc Systems and methods for magnetic field sensors with self-test
US9739846B2 (en) 2014-10-03 2017-08-22 Allegro Microsystems, Llc Magnetic field sensors with self test
US10156461B2 (en) 2014-10-31 2018-12-18 Allegro Microsystems, Llc Methods and apparatus for error detection in a magnetic field sensor
US10101410B2 (en) 2015-10-21 2018-10-16 Allegro Microsystems, Llc Methods and apparatus for sensor having fault trip level setting
US10495700B2 (en) 2016-01-29 2019-12-03 Allegro Microsystems, Llc Method and system for providing information about a target object in a formatted output signal
US10495485B2 (en) 2016-05-17 2019-12-03 Allegro Microsystems, Llc Magnetic field sensors and output signal formats for a magnetic field sensor
DE102016119446A1 (de) * 2016-10-12 2018-04-12 Fujitsu Technology Solutions Intellectual Property Gmbh Schnittstellenanordnung zum Anschluss eines Peripheriegeräts an eine Schnittstelle eines Host-Systems, Verfahren und elektronisches Gerät, insbesondere Computersystem
US10216559B2 (en) 2016-11-14 2019-02-26 Allegro Microsystems, Llc Diagnostic fault communication
US10747708B2 (en) 2018-03-08 2020-08-18 Allegro Microsystems, Llc Communication system between electronic devices
US10388362B1 (en) * 2018-05-08 2019-08-20 Micron Technology, Inc. Half-width, double pumped data path
US10656170B2 (en) 2018-05-17 2020-05-19 Allegro Microsystems, Llc Magnetic field sensors and output signal formats for a magnetic field sensor
US10725122B2 (en) 2018-07-20 2020-07-28 Allegro Microsystems, Llc Ratiometric sensor output topology and methods
US11686597B2 (en) 2019-06-07 2023-06-27 Allegro Microsystems, Llc Magnetic field sensors and output signal formats for magnetic field sensors
US11942831B2 (en) 2020-01-15 2024-03-26 Allegro Microsystems, Llc Three-phase BLDC motor driver/controller having diagnostic signal processing
US11029370B1 (en) 2020-05-22 2021-06-08 Allegro Microsystems, Llc Sensor output control methods and apparatus
US11811569B2 (en) 2020-09-01 2023-11-07 Allegro Microsystems, Llc Sensor integrated circuits having a single edge nibble transmission (SENT) output
US11885645B2 (en) 2021-06-17 2024-01-30 Allegro Microsystems, Llc Supply voltage configurable sensor
US11848682B2 (en) 2022-01-11 2023-12-19 Allegro Microsystems, Llc Diagnostic circuits and methods for analog-to-digital converters

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Also Published As

Publication number Publication date
KR101089486B1 (ko) 2011-12-02
DE502004010803D1 (de) 2010-04-08
US7319418B2 (en) 2008-01-15
US20050243184A1 (en) 2005-11-03
EP1575013A3 (fr) 2007-10-31
JP4745679B2 (ja) 2011-08-10
JP2005228336A (ja) 2005-08-25
KR20060041930A (ko) 2006-05-12
DE102004007486A1 (de) 2005-10-27
EP1575013B1 (fr) 2010-02-24

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