WO2009000701A1 - Procédé et dispositif permettant d'évaluer un signal indusi - Google Patents

Procédé et dispositif permettant d'évaluer un signal indusi Download PDF

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Publication number
WO2009000701A1
WO2009000701A1 PCT/EP2008/057609 EP2008057609W WO2009000701A1 WO 2009000701 A1 WO2009000701 A1 WO 2009000701A1 EP 2008057609 W EP2008057609 W EP 2008057609W WO 2009000701 A1 WO2009000701 A1 WO 2009000701A1
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WO
WIPO (PCT)
Prior art keywords
signal
indusi
criterion
frequencies
frequency
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Application number
PCT/EP2008/057609
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German (de)
English (en)
Inventor
Chris Kakuschke
Original Assignee
Siemens Aktiengesellschaft
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 Siemens Aktiengesellschaft filed Critical Siemens Aktiengesellschaft
Publication of WO2009000701A1 publication Critical patent/WO2009000701A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
    • B61L3/00—Devices along the route for controlling devices on the vehicle or train, e.g. to release brake or to operate a warning signal
    • B61L3/02—Devices along the route for controlling devices on the vehicle or train, e.g. to release brake or to operate a warning signal at selected places along the route, e.g. intermittent control simultaneous mechanical and electrical control
    • B61L3/08—Devices along the route for controlling devices on the vehicle or train, e.g. to release brake or to operate a warning signal at selected places along the route, e.g. intermittent control simultaneous mechanical and electrical control controlling electrically
    • B61L3/12—Devices along the route for controlling devices on the vehicle or train, e.g. to release brake or to operate a warning signal at selected places along the route, e.g. intermittent control simultaneous mechanical and electrical control controlling electrically using magnetic or electrostatic induction; using radio waves
    • B61L3/121—Devices along the route for controlling devices on the vehicle or train, e.g. to release brake or to operate a warning signal at selected places along the route, e.g. intermittent control simultaneous mechanical and electrical control controlling electrically using magnetic or electrostatic induction; using radio waves using magnetic induction

Definitions

  • the invention relates to a method and a device for evaluating an INDUSI signal.
  • INDUSI - inductive Werner ⁇ tion - is a widely used method for punctiform train control - PZB - and described for example in DE 197 58 365 Al.
  • the passage of a traction unit at a track position must be reliably detected.
  • electromagnets are mounted both on the vehicle and on the track position, which interact via magnetic fields.
  • the vehicle magnet serves, inter alia, as a transmitter and generates ak ⁇ tively magnetic fields by the supply of constant alternating current.
  • the solenoid on the track is in presence of the vehicle magnet induces in its immediate vicinity, a corresponding current, which must be reliably detected by the subsequent evaluation ⁇ electronics and reliably distinguished from disorder.
  • the frequency response is chosen such that the three useful frequencies, namely the INDUSI frequencies at 500 Hz, 1000 Hz and 2000 Hz, are in the passband. Within the passband but so far no suppression possi ⁇ probability for interference frequencies.
  • the bandpass of the can suppress, when applied to the raw signal Magne ⁇ th the influence of traction currents effectively, which is visible in the lowering of the wide-band filtered signal in FIG. 2
  • the signal representation in Figure 2 shows as a maximum - normalized to 1 - the induction of the vehicle magnet at its passage. This is followed by a massive disturbance within the passband after approx. 0.7 s. It reaches the tolerance range for the signal amplitude while undamped from the bandpass the vehicle magnetic passage, so that previous Ausreteverfah ⁇ ren transition to the error state.
  • the object is inventively achieved in that the He ⁇ bill discrete frequency band limited power values is provided with Goertzel and comb filters from a digitized signal, wherein the filtering on the basis of a system on a chip device according to using digital signal processing - SoC - takes place.
  • a doubling of Görtzelfilter is provided by the INDUSI frequencies, in addition, a comb filtering can be done.
  • FIG. 1 shows an approximate frequency selectivity of previous methods with INDUSI frequencies
  • FIG. 2 shows a broadband-filtered signal of a train passage
  • FIG. 3 shows an envelope in the case of vehicle magnetic passage
  • FIG. 4 shows a signal in the case of vehicle magnetic passage
  • FIG. 5 shows a line split in vehicle magnetic passage
  • FIG. 6 shows a frequency selectivity - spectral amplitude - of a Görtzel algorithm
  • FIG. 7 shows a frequency selectivity through a Görtzel pair around 1000 Hz
  • FIG. 8 shows a frequency selectivity through a pair of Görtzel around 2000 Hz
  • Figure 10 shows the effect of a Görtzel pair at 1000 Hz
  • Figure 10 shows a frequency selectivity of a comb filter
  • FIG. 11 shows a relative interference increase through the comb filter
  • FIG. 12 shows a frequency selectivity of a flanking gate for the negative evaluation at 1500 Hz
  • Categories 2 and 3 can be grouped together as no differentiation is expected from downstream processing. However, the distinction for no later ⁇ ter-defined quantitative optimization of the Ministry Klass mecanicskrite- is useful.
  • the feature space is thus the known representation of the relative signal amplitude over time or over the frequency during the preparatory disturbance isolation. On this basis, several partial characteristics are quantified.
  • the finally formulated relative distance criterion provides the categorization result via a threshold comparison not explicitly shown here.
  • the useful signal to be detected, induced by the vehicle magnet, must be sufficiently resolved even at high speeds.
  • a default for the time granulation of the evaluation can be derived ⁇ to.
  • FIG. 3 shows a time segment of the vehicle magnet passage of the signal already shown in FIG.
  • the chosen granularity for the envelope solves the Nutzsig ⁇ nal on when passing by the vehicle magnets with several reference points. It is assumed on the basis of the uncertainty principle that even interferers no much finer Ortsl. Develop time dependence, since they would also have to be effective in ent ⁇ speaking frequency band ( Figure 1). Due to the almost uniform translation in the considered short period of the train passage, this assumption is on the temporal resolution of the filters and representations considered below transferable.
  • a further processing of the power values is possible, but this leads to a doubling of the word width of the signal processor necessary for the dynamics representation.
  • a simulation of this ultimately rejected approach demonstrates the need to elaborate calculation ⁇ nender broken powers in the criteria form.
  • the frequency behavior is dimensioned by two parameters, the values depending on each other.
  • V n integer factor for the frequency selectivity -LU of the Görtzel resonator
  • phase locked RMS algorithm would only produce an exact result if the phase were the same.
  • the block length is only dependent on the selection frequency and its divisors on the ripple
  • the number of low frequency ripple together with the main peak is equal to the integer factor in the block length formula. If so for maximum selectivity when Auswer ⁇ processing of INDUSI Freqenzen emphasis, it must be for the 1000 Hz factor just to muffle at 500 Hz and 2000 Hz ma ⁇ ximal. For the 2000 Hz, analogous consideration yields a multiple of 4.
  • each of the three INDUSI frequencies form a corresponding relationship, which on the parameters, for. B. bi, is dimensioned in terms of its sensitivity to frequency asymmetry. Sizes to positive evaluation are available with the frequency-specific criteria for the desired overall evaluation criterion, which is opposite to the original signal having a verbes ⁇ Sertes signal / noise ratio. In order to fully exploit the possibilities of the feature selection, it is also possible to formulate negative evaluations, which particularly select the disorders to be expected. Because of by definition insensitivity to the harmonic INDUSI useful frequencies, the class of comb filters characterized in FIG. 10, which have equidistant attenuation frequencies in the linear spectrum, appears suitable.
  • the introduced target grid of the criterion also serves as the basis for the comb filter calculation.
  • FIG. 14 shows the behavior of the overall criterion for a linear interpolation of the Görtzel values for the subcriteria.
  • the Interpolationsaufwand can be increased compared to the li ⁇ nearen variant and z. B. be carried out in the manner of a cubic ⁇ interpolation according to Lagrange. As a result, however, no relevant increase in accuracy can be seen.
  • a good indicator for the rating of the classification is the relative fluctuation range of the overall criterion of a defined signal segment under different parameterizations compared to the achieved noise reduction.
  • the histogram of the signal amplitude in the initial state - bandpass - is compared with the histogram of the total ⁇ criterion in a logarithmic representation in Figure 15. All the relevant operations in the criteria formulation - multiplication and exponentiation - convert the logarithms to shifts and dilations of the histograms. If we limit our, as practiced in the following, to the formulation relative Quantilterme, the desired independence of the valuation of AMENDING ⁇ gen is reached in the criteria calculation.
  • the event vector which is summarized below in size hb, therefore contains the normalized to the useful signal amplitude and then Logarithm investigating criteria values of a representative train passage in the time frame with the exception of the useful signal values themselves.
  • Criterion distribution across the entire range of interference enhancement ensures more than sufficient scalability of the approach. Together with the exclusive use relative to the signal amplitude of effective operations can thus be based on the independence of the criteria effectiveness be ⁇ delay signal and interference intensity. In order to determine the effect of signal dynamics on the shift in emphasis and range of variation of the criteria distribution, separate considerations of different representative disturbances would otherwise be necessary.
  • the quotient of standard deviation and mean value is used as orientation.
  • This quotient referred to as the coefficient of variation VK or CV - the coefficient of variation - is distributed. depending on the condition.
  • the mean value against the central value is it - Median - and the Stan ⁇ deviation against the Quantilabstand Q .6 s - Q .35 - corresponds to a normal distribution as the standard deviation - exchanged.
  • the exact distribution-independent formulation does not show any relevant advantages, whereas it is much more expensive to calculate.
  • the uniting quality measure Störquo ⁇ tient can be formed, which combines the statistical and systematic ⁇ approach. It should stay as small as possible:

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
  • Noise Elimination (AREA)

Abstract

L'invention concerne un procédé et un dispositif permettant d'évaluer un signal INDUSI (contrôle inductif des trains), le calcul de valeurs de puissance discrètes à bande de fréquences limitée avec des filtres en peigne et de Görtzel à partir d'un signal numérisé par traitement numérique du signal, sur la base d'un système sur puce (SoC), servant à établir la distinction entre des signaux utiles et des signaux parasites.
PCT/EP2008/057609 2007-06-28 2008-06-17 Procédé et dispositif permettant d'évaluer un signal indusi WO2009000701A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200710030598 DE102007030598A1 (de) 2007-06-28 2007-06-28 Verfahren und Vorrichtung zur Auswertung eines INDUSI-Signals
DE102007030598.4 2007-06-28

Publications (1)

Publication Number Publication Date
WO2009000701A1 true WO2009000701A1 (fr) 2008-12-31

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WO (1) WO2009000701A1 (fr)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9243933B2 (en) 2011-09-09 2016-01-26 Continental Teves Ag & Co. Ohg Amplitude evaluation by means of a goertzel algorithm in a differential transformer displacement sensor

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10127277A1 (de) * 2001-05-28 2002-12-05 Siemens Ag System zur induktiven Zugsicherung
DE10223116A1 (de) * 2002-05-21 2003-12-18 Siemens Ag System zur induktiven Zugsicherung
DE10302858A1 (de) * 2003-01-03 2004-07-22 Siemens Ag System zur induktiven Zugsicherung
EP1739451A1 (fr) * 2005-06-24 2007-01-03 Siemens Aktiengesellschaft Capteur de vitesse pour véhicule

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3708788A1 (de) * 1987-03-18 1988-09-29 Standard Elektrik Lorenz Ag Frequenzmodulierter gleisstromkreis
DE19758365B4 (de) 1997-12-22 2004-07-08 Siemens Ag Fahrzeuggerät für die punktförmige induktive Zugbeeinflussung
DE10223241B4 (de) * 2002-05-21 2014-05-08 Siemens Aktiengesellschaft System zur induktiven Zugsicherung

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10127277A1 (de) * 2001-05-28 2002-12-05 Siemens Ag System zur induktiven Zugsicherung
DE10223116A1 (de) * 2002-05-21 2003-12-18 Siemens Ag System zur induktiven Zugsicherung
DE10302858A1 (de) * 2003-01-03 2004-07-22 Siemens Ag System zur induktiven Zugsicherung
EP1739451A1 (fr) * 2005-06-24 2007-01-03 Siemens Aktiengesellschaft Capteur de vitesse pour véhicule

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
DOLCH K ET AL: "INDUSI 60-R", SIGNAL + DRAHT, TELZLAFF VERLAG GMBH. DARMSTADT, DE, vol. 81, no. 10, 1 October 1989 (1989-10-01), pages 215 - 223, XP000094438, ISSN: 0037-4997 *

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