WO2009030655A1 - Method for axle counting in rail vehicles - Google Patents
Method for axle counting in rail vehicles Download PDFInfo
- Publication number
- WO2009030655A1 WO2009030655A1 PCT/EP2008/061474 EP2008061474W WO2009030655A1 WO 2009030655 A1 WO2009030655 A1 WO 2009030655A1 EP 2008061474 W EP2008061474 W EP 2008061474W WO 2009030655 A1 WO2009030655 A1 WO 2009030655A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- waveform
- digital
- pulse
- switching threshold
- signal
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims abstract description 9
- 101100129500 Caenorhabditis elegans max-2 gene Proteins 0.000 claims description 6
- 230000002123 temporal effect Effects 0.000 claims description 3
- 238000000638 solvent extraction Methods 0.000 abstract 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 238000001514 detection method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 230000004913 activation Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 229910000498 pewter Inorganic materials 0.000 description 1
- 239000010957 pewter Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
- B61L1/00—Devices along the route controlled by interaction with the vehicle or train
- B61L1/16—Devices for counting axles; Devices for counting vehicles
- B61L1/162—Devices for counting axles; Devices for counting vehicles characterised by the error correction
Definitions
- the invention relates to a method for axle counting in
- Rail vehicles with a in particular in the region of a rail curve arranged axle counting, wherein an analog waveform is compared at the output of Achs destroyedsensors with a first switching threshold, between the exceeding of which and subsequent undershooting a digital count is generated.
- Axle counting sensors are used in the railway industry for track vacancy detection, but also for other switching and reporting tasks. In this case, the magnetic field influencing effect of the iron wheels of rail vehicles is predominantly utilized.
- Two-channel sensors are required for the direction of travel detection of the rail vehicle. When driving over a vehicle wheel, the two sensor channels generate successively time-shifted signals which are used to detect the direction of travel.
- inductive mode axle counter can be in addition to the one- or two-channel design in proximity switches that detect the reaction of the iron wheels on a magnetic field generating sensor, and the railroad systems encompassing systems with separate transmitter and receiver.
- Allen inductively working sensors is common that they are susceptible to bogie tilting, which occur especially in the region of a rail bend. Through this so-called P understandgang bin it can become a brief break in the analog waveform to below the first switching threshold come, so that a division of the digital count results. This count pulse division leads to miscounts with respect to the number of axes that have passed the sensor. Of the
- Spategang bin occurs particularly pronounced in rail arches with relatively small radius, as it typically occurs in local traffic.
- the behavior of rail vehicles when cornering is u. a. described in Friedrich, F. "Tracking in narrow track arches", The Nah Industries 2/1985, pages 52 - 61.
- the invention has for its object to provide a method for axle counting with Achsieresensoren in which the P mangang bin does not adversely affect, so that Achsprogressivelyinen be avoided.
- the object is achieved in that a division of the digital count pulse for a brief break in the analog waveform to below the first
- Switching threshold is avoided by the waveform in the region of the burglary is either raised or converted into a digital pulse and ORed with the originally divided pulse to the digital Zählimpuls.
- the signal curve in the area of the intrusion is virtually artificially straightened in the manner of an envelope curve.
- the signal dip it is also possible to use the signal dip to separately generate a digital pulse which is superimposed on the originally divided pulse, resulting in an undivided total pulse, which is further evaluated as a digital count.
- the bridging of the signal dip according to variant 1 can be realized in that the analog waveform is digitized and compared with a lying below the first switching threshold second switching threshold that signal sections between maxima of lying above the second switching threshold digitized waveform by digitally generated signal sections, which connect the maxima by a straight line, be replaced and that the thus modified digitized waveform is analogized and replaces the original analog waveform.
- the second switching threshold ensures that true counts resulting from two different axes are not merged into a single pulse.
- the second variant in which the signal collapse is not quasi retouched, but deliberately used to correctors, can be realized in that the analog waveform is evaluated by a differentiator in terms of slope, the digital pulse at turning points at which the slope becomes negative, is generated. This digital pulse thus arises in the region of the signal dip and is ORed with the originally divided pulse to the digital count. From the original double pulse thus arises by superposition with the at the inflection point, ie at the beginning of Burglary, the analog signal waveform starting additional impulse a single count.
- Claim 4 provided that the temporal length of the digital pulse of the average slope in a previous time interval is dependent.
- FIG. 1 shows the generation of a counting pulse when an axle counting sensor is arranged on a straight track
- FIG. 2 shows the generation of a double counting pulse when the axle counting sensor is arranged on a curved track
- FIG. 3 shows a first variant for avoiding the double counting pulse according to FIG. 2 and FIG
- FIG. 4 shows a second variant for avoiding the double counting pulse according to FIG. 2.
- FIG. 1 illustrates the situation with an axle counting sensor which is mounted on a straight track and is run over by a railway wheel. It can be seen that at the output of the Achsterrorismsensors a waveform 2 results, upon reaching a first switching threshold 3 a turn-on signal for the generation of a digital Count 4 is activated. As the wheel continues to move, a maximum of the influence 1 and thus also of the output-side signal course 2 is initially achieved. Subsequently, the influence 1 decreases, wherein when falling below the first switching threshold 3, the signal that the digital
- Count 4 generated is deactivated again. Consequently, there is exactly one digital count 4 for each wheel of the rail vehicle.
- the influence of a hysteresis causing the turn-off threshold for the activation of count 4 to be slightly lower than the turn-on threshold has been ignored for ease of illustration.
- axle counting sensor is mounted on a curved track, it can - as Figure 2 shows - by tilting a bogie, d. H. through the pewter effect, the
- FIG. 3 shows a first variant for avoiding the division in two parts 4.1 / 4.2 of the counting pulse 4.
- first the entire analogue signal course 2.1 is digitized and stored in a memory.
- second switching threshold 6 which is below the first switching threshold 3
- FIG. 4 illustrates a second variant for avoiding a double counting pulse 4.1 / 4.2.
- the analog influence 1.1 of the Achsterrorismsensors is evaluated by a differentiator.
- the differentiated signal is a measure of the steepness of the analog influence 1.1 of the axle counting sensor.
- d. H. if slope 0, the sign of the differentiated signal changes.
- a delay signal 8.1, 8.2, 8.3 is generated, whose temporal
Landscapes
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Mechanical Engineering (AREA)
- Train Traffic Observation, Control, And Security (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH00258/10A CH699856B1 (en) | 2007-09-03 | 2008-09-01 | Axle counting process for rail vehicles. |
DE112008002203T DE112008002203A5 (en) | 2007-09-03 | 2008-09-01 | Axis counting procedure for rail vehicles |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102007041956.4 | 2007-09-03 | ||
DE102007041956 | 2007-09-03 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2009030655A1 true WO2009030655A1 (en) | 2009-03-12 |
Family
ID=40054674
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2008/061474 WO2009030655A1 (en) | 2007-09-03 | 2008-09-01 | Method for axle counting in rail vehicles |
Country Status (4)
Country | Link |
---|---|
CH (1) | CH699856B1 (en) |
DE (1) | DE112008002203A5 (en) |
TW (1) | TW200918381A (en) |
WO (1) | WO2009030655A1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102248954A (en) * | 2011-05-24 | 2011-11-23 | 深圳科安达电子科技股份有限公司 | Method and system for overcoming poor branches of track circuit by using axle counting equipment |
CN102815321A (en) * | 2012-08-24 | 2012-12-12 | 深圳市科安达轨道交通技术有限公司 | System for solving poor shunting of track circuit by using axle counting equipment |
CN109613357A (en) * | 2018-12-10 | 2019-04-12 | 通号城市轨道交通技术有限公司 | Method for judging running state of track circuit |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1755159A1 (en) * | 1968-04-06 | 1971-11-18 | Standard Elek K Lorenz Ag | Method for monitoring and pulse evaluation in axle counting devices for railway systems |
US5333820A (en) * | 1993-02-18 | 1994-08-02 | Union Switch & Signal Inc. | Railway vehicle wheel detector utilizing magnetic differential bridge |
DE19745436A1 (en) * | 1997-10-15 | 1999-04-22 | Cit Alcatel | Rail track contact for axle counting device |
-
2008
- 2008-08-25 TW TW97132349A patent/TW200918381A/en unknown
- 2008-09-01 CH CH00258/10A patent/CH699856B1/en not_active IP Right Cessation
- 2008-09-01 WO PCT/EP2008/061474 patent/WO2009030655A1/en active Application Filing
- 2008-09-01 DE DE112008002203T patent/DE112008002203A5/en not_active Withdrawn
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1755159A1 (en) * | 1968-04-06 | 1971-11-18 | Standard Elek K Lorenz Ag | Method for monitoring and pulse evaluation in axle counting devices for railway systems |
US5333820A (en) * | 1993-02-18 | 1994-08-02 | Union Switch & Signal Inc. | Railway vehicle wheel detector utilizing magnetic differential bridge |
DE19745436A1 (en) * | 1997-10-15 | 1999-04-22 | Cit Alcatel | Rail track contact for axle counting device |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102248954A (en) * | 2011-05-24 | 2011-11-23 | 深圳科安达电子科技股份有限公司 | Method and system for overcoming poor branches of track circuit by using axle counting equipment |
CN102815321A (en) * | 2012-08-24 | 2012-12-12 | 深圳市科安达轨道交通技术有限公司 | System for solving poor shunting of track circuit by using axle counting equipment |
CN109613357A (en) * | 2018-12-10 | 2019-04-12 | 通号城市轨道交通技术有限公司 | Method for judging running state of track circuit |
Also Published As
Publication number | Publication date |
---|---|
DE112008002203A5 (en) | 2011-02-24 |
CH699856B1 (en) | 2011-07-29 |
TW200918381A (en) | 2009-05-01 |
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