DE102005039827A1 - Sensor information transmission procedure combines outputs from all sensor modules with modulation marking into single signal data interface with processor - Google Patents

Sensor information transmission procedure combines outputs from all sensor modules with modulation marking into single signal data interface with processor

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Publication number
DE102005039827A1
DE102005039827A1 DE102005039827A DE102005039827A DE102005039827A1 DE 102005039827 A1 DE102005039827 A1 DE 102005039827A1 DE 102005039827 A DE102005039827 A DE 102005039827A DE 102005039827 A DE102005039827 A DE 102005039827A DE 102005039827 A1 DE102005039827 A1 DE 102005039827A1
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Germany
Prior art keywords
sensor
signal
marking
current
respective
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
DE102005039827A
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German (de)
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DE102005039827B4 (en
Inventor
Henrik Antoni
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.)
Continental Teves AG and Co oHG
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Continental Teves AG and Co oHG
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Priority to DE102004042938.3 priority Critical
Priority to DE102004042938 priority
Application filed by Continental Teves AG and Co oHG filed Critical Continental Teves AG and Co oHG
Priority to DE102005039827.8A priority patent/DE102005039827B4/en
Publication of DE102005039827A1 publication Critical patent/DE102005039827A1/en
Application granted granted Critical
Publication of DE102005039827B4 publication Critical patent/DE102005039827B4/en
Application status is Active legal-status Critical
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Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01DMEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D5/00Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
    • G01D5/12Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
    • G01D5/14Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage
    • G01D5/142Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage using Hall-effect devices
    • G01D5/145Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage using Hall-effect devices influenced by the relative movement between the Hall device and magnetic fields
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01PMEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P3/00Measuring linear or angular speed; Measuring differences of linear or angular speeds
    • G01P3/42Devices characterised by the use of electric or magnetic means
    • G01P3/44Devices characterised by the use of electric or magnetic means for measuring angular speed
    • G01P3/48Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage
    • G01P3/481Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage of pulse signals
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01PMEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P3/00Measuring linear or angular speed; Measuring differences of linear or angular speeds
    • G01P3/42Devices characterised by the use of electric or magnetic means
    • G01P3/44Devices characterised by the use of electric or magnetic means for measuring angular speed
    • G01P3/48Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage
    • G01P3/481Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage of pulse signals
    • G01P3/489Digital circuits therefor

Abstract

A method for transmitting sensory information of a plurality of sensor modules (14, 16) is intended to enable a distinction and individual evaluation of individual sensor signals (18, 20) in a reliable manner and with a particularly low outlay. For this purpose, it is provided according to the invention that an output signal (18, 26) of the measuring arrangement (4, 16) from the sensor signal (18, 20) of the sensor module (14, 16) is assigned to a measuring arrangement (4, 6) assigned to the respective sensor module (14, 16). 6), wherein the sensor signal (20) of at least one sensor module (16) an individual mark signal is impressed and wherein from the output signals (18, 26) of all measuring arrangements (4, 6) a sum signal (28) is formed, which via a common information interface to an evaluation unit (12) is transmitted.

Description

  • The The invention relates to a method for transmitting sensory Information of a plurality of sensor modules via a common information interface. It further relates to a method suitable for carrying out the method Contraption.
  • active Measuring arrangements in which the wiring between a sensor module and one provided for the evaluation of the sensory information Evaluation circuit both for transmission the sensor signals as well as the voltage supply of the sensor module is used, are widely known. They come in particular modern motor vehicles are used because they are on the one hand signal technology reliable and Generate comparatively less error-prone measured values can, and on the other hand, the total cost of the wiring due to the Multiple use of the cable can be kept very low.
  • For example, is from the EP 0 922 230 B1 an active measuring arrangement known, in which the sensor module in addition to the sensor element also called actual transducer comprises a current source and a modulator. The modulator controls the current source, which then supplies an impressed current representing the recorded measured value to the evaluation unit. The transmission of the current signal modulated in this way to the evaluation unit takes place via the same two-wire line, or more generally via the same interface, via which the supply voltage required for operating the sensor element and the modulator is provided.
  • at It is the use of multiple independent sensor modules for one further reduction of the signal / supply lines desirable all sensor modules over to connect a common interface with the evaluation unit. For this purpose, from the older, previously unpublished German Patent Application No. 102004010962 a sensory arrangement in which a plurality of sensor modules of the above-described Type is connected in parallel, with a single two-wire line a composite of the individual sensor signals sum signal transmitted to the evaluation unit becomes. In general, however, is a distinction on the same sensors on the Origin of the sensor signals based on the sum signal in principle not possible.
  • Of the Invention is therefore based on the object, a device and a method of transmission of sensory information of a plurality of sensor modules ready to deliver on reliable Way and with particularly low effort a distinction and individual evaluation of the individual sensor signals, in particular in the case of similar sensors, allow.
  • Regarding the Method, the object is achieved according to the invention by in a measuring arrangement assigned to the respective sensor module the sensor signal of the sensor module, an output signal of the measuring arrangement is formed, wherein the sensor signal of at least one sensor module an individual marker signal is impressed, and wherein from the Output signals of all measuring arrangements formed a sum signal that's over a common information interface transmitted to an evaluation becomes.
  • Of the Invention is the consideration based on that already known and in terms of circuit complexity particularly advantageous and cost-effective concept the transmission a sum signal or a beat signal via a common information interface to be refined should be that on the basis of the sum signal a reliable reconstruction the waveforms the individual signals possible is. In other words, the overlay The individual sensor signals should be done in such a way that the originals, the signal components assigned to the individual sensor modules again reliably and clearly identify or decode.
  • This will according to the here concept achieved by adding even before the formation of the sum signal one or more sensor signals in each case an individual marking signal is imprinted. In other words: Only the processed by the marking and modified sensor signals are added and then as a sum signal over transfer the common interface to the evaluation unit. The evaluation unit can then use the tag shares respective (original) Identify or reconstruct the sensor signal.
  • The marking of a single sensor signal is carried out in the measuring arrangement or circuit environment assigned to the respective sensor module. In the case of a plurality of sensor modules with corresponding sensor signals, it suffices to mark all the sensor signals except one individually for the purpose of distinguishing all the signals. In the special case that no marking is required or desired for this one or for another special sensor signal, it is sufficient if the measuring arrangement only consists of the sensor module itself and thus the output signal of this special measuring arrangement by the unmodi fied sensor signal itself is given.
  • Especially is appropriate the method with digital sensor signals, so sensor signals with a fixed number of possible discrete function values. An identification of a single signal designed in accordance with simple because that in the evaluation incoming sum signal only with the inclusion of the marking components must be sampled according to the known amplitude values. Especially the respective sensor signal can also be a binary signal, the only two conditions can accept. There is a particular advantage of the method in that it is also the signals of several similar sensor modules, where the possible Signal values match, reliable process and can differ in the evaluation. In the Time can the signals be continuous or discrete (clocked).
  • Preferably the marking of a sensor signal takes place in that in the Type of amplitude modulation a signal proportional to the sensor signal is added to the sensor signal. Advantageously, the associated proportionality factor a number different from an integer. This can be a single output signal of a measuring arrangement always from the sum of two or multiple output signals. In a majority of sensor signals to be marked can be the concept accordingly expand. It should then preferably all proportionality factors be different from each other. Particularly advantageous is an implementation of the method in which the respective sensor signal, the respective Marking signal and the sum signal represented by electric currents and where the common information interface is a power interface The type described above is.
  • A to carry out the method suitable device according to the invention has a plurality from electrically connected in parallel and via a common power interface connected to an evaluation unit measuring arrangements, wherein the respective measuring arrangement comprises a sensor module, and wherein at least a measuring arrangement comprises a marking device which is such is switched that the sensor current of the associated sensor module during operation of the device, a marking current is impressed. That over the Information interface transmitted Output signal then corresponds to the sum of the individual sensor modules impressed and marked or modified by the marking devices Sensor signals.
  • Prefers two or more sensor modules are connected in parallel. In the event of several sensor modules is the circuit by simple parallel connection the outputs the other sensor modules and their specific marking devices in principle arbitrarily expandable. In this way, the Signals of several sensor modules with the same current interface via one Two-wire transmission and still distinguishable.
  • Prefers are all sensor modules of the device of the same type, which the entire circuit arrangement is based on standardized electronic components can be realized particularly cost-effective. Yet can the individual sensor modules with their respective sensors for perfect different measurement purposes and for recording very different Measured variables provided be.
  • Preferably, the respective sensor module is designed such that it supplies a digital current signal, in particular a binary current signal, as a sensor signal. Such a sensor module can, for example, as in the EP 0 922 230 B1 described, in particular as an integrated electrical component to be executed.
  • The Marking device is preferably by an electrical amplifier circuit formed, which is preferably for providing a sensor current proportional marker current comprises a proportional element. The amplifier circuit can in particular by a simple and inexpensive transistor circuit be realized. In this case, the entirety of the measuring arrangements is advantageously over one Two-wire line connected to the evaluation unit. About these Two-wire signal line is also the supply of the measuring arrangements with the operating voltage.
  • advantageously, the respective sensor module comprises a magnetic sensor element, for example, together with one on a rotating machine part (about a shaft or a wheel) arranged encoder or encoder can act as a speed sensor. The respective sensor element can but also for be designed or provided a detection of translational movements. The apparatus and method are preferred in the control and monitoring technical installations and machines, but especially in the automotive sector used. Very particularly preferred is the use of the here described Concept in the sector of hydraulic and electrohydraulic Brake systems, the parking brake, the drive gear, the vehicle door or else of the safety belt in a motor vehicle.
  • The advantages achieved by the invention be stand in particular that with the described method, the signals of a plurality of sensor elements can be transmitted via a common interface or transmission path, while still the individual signal components remain distinguishable. As a result, the otherwise required for each sensor element two-wire lines can be saved, so that significantly reduce the cost of the transmission path when using multiple sensor elements. In addition to the lower material costs, lower installation costs for laying the interface cables or cables contribute to cost reduction. A further advantage of the invention is that the marking device advantageously provided in each case for marking or marking the sensor signals can be realized in a particularly simple and cost-effective manner in the manner of an amplifier circuit, for example as a simple transistor amplifier.
  • One embodiment The invention will be explained in more detail with reference to a drawing. Show:
  • 1 schematically a device for transmitting sensory information via a common information interface, and
  • 2 Diagrams showing the current flow within the transmission device.
  • In the 1 illustrated device 2 For the transmission and evaluation of sensory information comprises two electrically parallel connected measuring arrangements 4 . 6 , which has a two-wire line serving as common information interface 8th with a signal receiver 10 are connected. The measuring arrangements 4 . 6 be over the two-wire line 8th supplied with the operating voltage U B. The signal receiver 10 is part of an evaluation unit 12 that by the current I in the two-wire line 8th represented current signal can convert into a numerical value.
  • Each of the two measuring arrangements 4 . 6 includes a sensor module 14 . 16 , which changes its resistance and thus the partial current I S1 , I S2 in the respective branch depending on the underlying physical quantity. Such a sensor module 14 . 16 can according to the EP 0 922 230 B1 be constructed and have a not further shown here sensor element and a modulator. The effective as an actual transducer sensor element controls the current interface via the modulator, wherein a binary current signal, represented by the current I S1 , I S2 , is impressed in the respective circuit. The respective sensor element may, for example, be a magnetic sensor element for detecting the rotational speed of a rotating machine part or wheel triggered by an associated signal transmitter, so that the sensor module 14 . 16 in this case provides a rotational behavior representing binary current signal. This measurement principle has proven to be particularly robust in terms of signal technology and at the same time economically inexpensive in motor vehicle technology in application in wheel speed detection, and is therefore generally accepted.
  • In the present case, the two similar sensor modules 14 . 16 used to detect different, independent measured variables. 2 shows in the image a) on the sensor module 14 output sensor signal 18 , Shown is the measured in dimensionless units current I S1 as a function of time. The binary current signal assumes the values "1" or "2". Partial image b) shows a corresponding sensor signal 20 of the sensor module 16 in the same time interval. The sensor module 16 is of the same type as the sensor module 14 so that the sensor signal 20 even in this case can only accept the values "1" or "2".
  • Through a simple parallel connection of the sensor modules 14 . 16 would result in a sum signal that, depending on the instantaneous values of the individual signals 18 . 20 may have the values "2", "3" or "4." This has the disadvantage that if the value "3" is present, it can not be decided with ease on the basis of the sum signal which of the two sensor modules 14 . 16 the signal value "1" or "2" is assigned.
  • Nevertheless, the economically advantageous signal transmission over the common power interface even with similar sensor modules 14 . 16 to be able to use and thereby to enable an identification of the individual signal components, is in the in 1 provided circuit arrangement provided, the sensor signals 18 . 20 the sensor modules 14 . 16 - Before the formation of the sum signal - to make distinguishable by a specific marker signal. For this purpose, the measuring arrangement comprises 6 next to the sensor module 16 also an amplifier circuit which acts as a marking device 22 , which corresponds to the sensor current I S2 of the sensor module 16 proportional marking current I V2 generated by the resistor 24 is added to the sensor current I S2 . The amplifier circuit 22 is realized in the embodiment as a simple transistor circuit. Of course, other amplifier circuits may also be used. The output signal formed in this way 26 the measuring arrangement 6 is in part c) of 2 illustrated, wherein for the sensor current I S2 proportional to marking current I V2 a proportionality factor of 0.5 a provided or, was specified. This takes the output signal 26 the values "1.5" or "3". Because the measuring arrangement 4 only from the sensor module 14 is in this case the sensor signal 18 equal to the output of the measuring device 4 ,
  • Finally, partial image d) shows that from the output signals 18 . 26 the measuring arrangements 4 . 6 formed summation signal 28 that over the two-wire line 8th to the signal receiver 10 is transmitted. Possible signal values are "2.5", "3.5", "4.0" and "5.0". On the basis of these values, an unambiguous identification or reconstruction of the original sensor currents I S1 and I S2 is possible, since there is only a single combination of the individual signals, which in total sum to the stated values of the sum signal 28 leads. Such an assignment and evaluation can be done, for example, by means of a suitable logic circuit in the evaluation unit 12 be made automated.
  • The described circuit configuration can be expanded by further sensor modules and in each case specifically assigned amplifier circuits. This allows the signals of several sensor modules 14 . 16 with the same current interface via a single two-wire line 8th transferred and still distinguishable.
  • 2
    contraption
    4, 6
    measuring arrangement
    8th
    Two-wire line
    10
    signal receiver
    12
    evaluation
    14 16
    sensor module
    18 20
    sensor signal
    22
    amplifier circuit / Marking device
    24
    resistance
    26
    output
    28
    sum signal
    U B
    operating voltage
    I
    total current
    I S1
    sensor current
    I S2
    sensor current
    I V2
    amplifier current

Claims (15)

  1. Method for transmitting sensory information of a plurality of in each case one measuring arrangement ( 4 . 6 ) associated sensor modules ( 14 . 16 ), from which the sensor signal ( 18 . 20 ) of the respective sensor module ( 14 . 16 ) an output signal ( 18 . 26 ) of the associated measuring arrangement ( 4 . 6 ) is formed, wherein the sensor signal ( 18 . 20 ) at least one sensor module ( 16 ) an individual marking signal is impressed, and wherein from the output signals ( 18 . 26 ) of all measuring arrangements ( 4 . 6 ) a sum signal ( 28 ) is formed, which via a common information interface to an evaluation unit ( 12 ) is transmitted.
  2. Method according to Claim 1, in which the respective sensor signal ( 18 . 20 ) is a digital signal, in particular a binary signal.
  3. Method according to Claim 1 or 2, in which the possible signal values of all sensor signals ( 18 . 20 ) are the same.
  4. Method according to one of claims 1 to 3, wherein the marking is carried out by a sensor signal ( 18 . 20 ) proportional marking signal to the sensor signal ( 18 . 20 ) is added.
  5. The method of claim 4, wherein the proportionality factor is not integer.
  6. Method according to Claim 4 or 5, in which a plurality of sensor signals ( 18 . 20 ), all proportionality factors being different from each other.
  7. Method according to one of Claims 1 to 6, in which the respective sensor signal ( 18 . 20 ), the respective marking signal and the sum signal ( 28 ) are represented by electrical currents (I S1 , I S2 , I V2 , I), and in which the common information interface is a current interface.
  8. Device for carrying out the method according to one of claims 1 to 7 with a plurality of electrically connected in parallel and via a common current interface with an evaluation unit ( 12 ) associated measuring arrangements ( 4 . 6 ), wherein the respective measuring arrangement ( 4 . 6 ) a sensor module ( 14 . 16 ), and wherein at least one measuring arrangement ( 6 ) a marking device ( 22 ), which is connected such that the sensor current (I S2 ) of the associated sensor module ( 16 ) during operation of the device ( 2 ) a marking current (I V2 ) is impressed.
  9. Apparatus according to claim 8, wherein all sensor modules ( 14 . 16 ) are of the same type.
  10. Apparatus according to claim 8 or 9, wherein the respective sensor module ( 14 . 16 ) a digital current signal, in particular a binary current signal, as a sensor signal ( 18 . 20 ).
  11. Device according to one of Claims 8 to 10, in which the marking device ( 22 ) is formed by an electrical amplifier circuit.
  12. Apparatus according to claim 11, wherein the amplifier circuit for providing a the Sensor current (I S2 ) proportional marking current comprises a proportional element.
  13. Device according to one of Claims 8 to 12, in which the entirety of the measuring arrangements ( 4 . 6 ) via a two-wire line ( 8th ) with the evaluation unit ( 12 ) connected is.
  14. Device according to Claim 13, in which the two-wire line ( 8th ) for the supply of the measuring arrangements ( 4 . 6 ) is connected to the required operating voltage (U B ) to a voltage source.
  15. Device according to one of claims 1 to 14, in which the respective sensor module ( 14 . 16 ) comprises a magnetic sensor element, in particular a magnetic sensor element for detecting translational or rotational movements.
DE102005039827.8A 2004-09-02 2005-08-22 Method for transmitting sensory information and device for carrying out the method Active DE102005039827B4 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE102004042938.3 2004-09-02
DE102004042938 2004-09-02
DE102005039827.8A DE102005039827B4 (en) 2004-09-02 2005-08-22 Method for transmitting sensory information and device for carrying out the method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102005039827.8A DE102005039827B4 (en) 2004-09-02 2005-08-22 Method for transmitting sensory information and device for carrying out the method

Publications (2)

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DE102005039827A1 true DE102005039827A1 (en) 2006-07-13
DE102005039827B4 DE102005039827B4 (en) 2020-01-16

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008055775A1 (en) * 2006-11-08 2008-05-15 Austriamicrosystems Ag Sensor evaluation arrangement, and method for operating a sensor arrangement
CN104713579A (en) * 2014-12-09 2015-06-17 深圳市德赛微电子技术有限公司 Universal type sensor signal processing system

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19618867A1 (en) * 1995-08-26 1997-02-27 Bosch Gmbh Robert System for changing a rotational speed signal
DE19634715A1 (en) 1996-08-28 1998-03-05 Teves Gmbh Alfred Arrangement for detecting the rotational behavior of a wheel
DE19815011A1 (en) * 1998-04-03 1999-10-14 Temic Semiconductor Gmbh A method for transmission of digital broadcast signals
JP4122221B2 (en) * 2000-11-22 2008-07-23 コンティネンタル・テーベス・アクチエンゲゼルシヤフト・ウント・コンパニー・オッフェネ・ハンデルスゲゼルシヤフト Active magnetic sensor for electronic brake equipment

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008055775A1 (en) * 2006-11-08 2008-05-15 Austriamicrosystems Ag Sensor evaluation arrangement, and method for operating a sensor arrangement
CN104713579A (en) * 2014-12-09 2015-06-17 深圳市德赛微电子技术有限公司 Universal type sensor signal processing system

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