DE19515694A1 - Procedure for the automatic correction of counting errors in multi-section axle counting systems - Google Patents

Abstract

The error correction system detects a counting error by comparing the axle count provided by a counting point with the count values provided by the adjacent counting points. The individual track sections are associated with respective net counters (A1,A2,A3) holding the obtained count values, with evaluation of the count values provided by each set of 3 successive counters, for detection and correction of counting errors.

Description

The invention relates to a method according to the preamble of Claim 1.

Such a method is e.g. B. in "Signal + Draht 86" (1994) booklet 1/2, described on page 5 to page 8. The correction of There are counting errors from a comparison of the counting results from in Direction of travel depends on successive metering points. Come on one of several successive metering points more permanent compared to the meter readings of the other metering points 1 or 2 increased or decreased counter reading, so it is most likely due to a miscount and may be corrected in many cases. Crucial for whether a correction may be made and which others Conditions for this to occur must be certain Patterns of three consecutive points of delivery obtained counting results.

In addition to incorrect counts, axle counting systems can also Point of delivery failures occur and cause operational disabilities. In order to avoid such operational disabilities, an in  DE-OS 34 31 171 described track vacancy detection device Summary of those adjacent to a defective point of delivery Track sections to a single longer track section provided (see page 11, lines 3 to 8).

However, since axle counting is not possible in such a system is carried out on a point of delivery basis, but on a section basis a correction of metering point counts via counting patterns, such as not described in the area of a failed metering point possible.

It is therefore an object of the invention to provide a correction method specify that a count error correction for section-related working axle counting systems allowed, even in the case of Point of delivery failures caused by merging track sections can be mitigated in their effects.

This object is achieved by the specified in claim 1 Features resolved.

With the correction method according to the invention, the largest part the counting error can be corrected without redundant Facilities such as B. additional axis detectors Need to become.

This simple three-section correction adds to yours Execution of three consecutive free track sections ahead. It is indicated by in the subclaims Developments of the invention to an expanded Three-section correction improved, as described in claim 2 enables the correction to be carried out even if one of the three track sections already from a subsequent train was occupied and / or if, as provided in claim 3, the last of the three sections has not yet been cleared.

On the basis of 2 figures, exemplary embodiments of the Correction method according to the invention will be described.

Fig. 1 shows the principle of the three-section correction,

FIG. 2 shows the principle of the extended three-section correction when one or two of the three track sections cooperating in the correction are occupied.

In Fig. 1a, a railway line S is shown schematically, which by Zp1 equipped with a computer,. . . , ZP4 is divided into track sections. A axle counting computer, which is assigned to a number of track sections and is not shown in the figure, reads out internal memories of the metering point computers, which contain a current number of axles and the direction of passage of the last registered axis, at regular time intervals and manages a net counter A1, for each track section. . ., A3, to the counter reading of which he added changes to the number of axles stored in the counting points delimiting the track section, depending on whether the section is a running axis or a running axis from it, with a positive or negative sign. A certain target counter reading (eg the counter reading "0") is a prerequisite for a free signal from the respective track section.

In Fig. 1, the track section delimited by the metering points ZP1 and ZP2 is assigned the net counter A1, the net counters A2 and A3 belong to the track sections which are delimited by the metering points ZP2 and ZP3 or by the metering points ZP3 and ZP4.

FIG. 1 a also shows an error pattern that has arisen as a result of a positive incorrect count of + d axes at the metering point ZP3. The net counters A2 and A3 have been adversely affected by this incorrect count. The axes incorrectly counted at the point of delivery ZP3, moving in the direction of travel R, resulted in a negative deviation -d from the target meter reading (0) in the net counter A2, in the net counter A3 they left an excess of + d after clearing the assigned track section. The net counter A1 of the track section first traveled remained unaffected.

In this case a correction of the level of the net meters is required allowed. It always starts from the net counter, which after evacuation of the associated track section one against his Target meter reading has a lower meter reading. Such negative deviation from the target counter reading is a clear one Criterion for a miscount because of other operational events or malfunctions cannot cause negative meter readings and For example, it can be ruled out that a train will be during the Drive increased its number of axles. After finding a negative The meter reading of a net meter becomes the meter reading of the Net counter of neighboring sections checked. The net counter that after clearing the associated track section a positive one Deviation from its target counter reading, which in the amount of negative deviation of the net counter of the neighboring section corresponds, may also be corrected, since this with at Security of limited probability also on the miscount is due. A correction could only be wrong here Be place and lead to a dangerous release if at least one further counting error at an adjacent metering point and at the same time there would be a train separation. Such a Case is so unlikely that it can be excluded.

The location of the miscount is always the point of delivery at which the Track sections whose net counter is an opposite deviation show from their target counter readings, adjoin each other. The Correction is made by adding the missing count d to  Status of the negative deviation from the target meter reading Net counter and by deducting the shortfall d from the status of the positive deviation from the target meter reading net meter.

FIG. 1b shows the distance S corresponding to FIG. 1a with a negative incorrect count at the point of delivery ZP2. In the error image, the counter readings of the net counters A1 and A2 have been changed due to the insufficiently counted axes of a train traveling in the direction of travel R. The net counter A2 has the negative counter reading of -d, which is decisive for the admissibility of a correction, while the net counter A1 shows a positive remainder d of the same amount and the net counter A3 shows the unchanged target counter reading. The same applies here to the correction as to the case described in connection with FIG. 1a.

The described three-section correction corresponds to the Security of the magazine article mentioned at the beginning described "symmetrical quad correction", but only needs three free track sections to be able to be executed.

To be free with even less, available To be able to correct track sections counting errors can Three-section correction will be expanded.

Fig. 2 shows schematically three cases in which additional system checked by a Zählfehlerkorrektur conditions may be carried out:

• 1. The three-section correction after the occupation of the in Direction of the track section back.
• 2. The three-section correction in the event of incomplete clearance of the track section ahead in the direction of travel and  
• 3. The three-section correction in the presence of the both of the above cases.

In order to be able to carry out an extended three-section correction, the clearing of each track section and the direction of the Axis passage that led to this clearing after renewed occupation at least until the next vacancy get saved. Then the axle counter computer can make the correction make.

If, as in the fault diagram of FIG. 2, the net counter A1 of the neighboring section lying in the direction of travel shows a position Y above its target counter reading, then a check is carried out to determine whether a previous clearance message and its occurrence by counting axes in the direction of travel R is stored. If this is the case, the correction is made in accordance with the method described in connection with FIG . During the correction, the status of the net counter A1 remains unchanged, the net counter A2 receives the shortfall d corresponding to the counting error and the net counter A3 receives the amount d subtracted.

The latter also happens if the one belonging to the net meter A3 Track section has not yet been cleared completely and the Net counter A3 has a positive counter reading that is larger than the counting error, i.e. d + x. After the correction, the Net meter A3 the meter reading x.

If metering points fail, the adjacent ones Track sections combined into virtual track sections, see above are the contents of the net counter of the track sections that the form new sections of the virtual track section, in a new one, assigned to the virtual track section Net counter entered. The virtual track section can then like an ordinary track section will be treated.

Claims (3)

1.Procedure for correcting counting errors in multi-section axle counting systems, in which counting points equipped with computer systems (ZP1,..., ZP4), at which the number and direction of passage of passing axes are determined and stored, divide a distance (S) into individual track sections and in which an axle counting computer assigned to several track sections reads out the counting results stored by the computers of the metering points at short intervals and for each assigned track section a balance sheet is drawn up of the axes that have been moved into and out of this track section and, depending on this, reports the track section free or occupied and the counting error occurring at a metering point is determined and possibly corrected with the aid of axle information obtained at adjacent and neighboring metering points, characterized in that the axle counting computer calculates the axle counting balance of each track section assigned to it n a net counter assigned to this track section (A1,. . . , A3) saves and updates regularly that deviations (d, -d) of the net meter readings from given target meter readings, which cause the clearing of the respectively assigned track section, are recorded according to amount and sign, that a negative deviation (-d) of the status of a net meter (A2) of a track section is corrected from the respectively predetermined target meter reading if the net meter (A3) of a neighboring track section lying on two sides of the track section has a positive deviation of the target meter reading equal in magnitude to the negative deviation in amount and the net meter (A1) of the other neighboring track section has no deviation from its target counter reading, and that, together with the correction of the negative deviation, a correction of the positive deviation of the net counter of the neighboring track section of equal magnitude takes place. 2. The method according to claim 1, characterized in that the Occurrence of an indication of the absence of a track section Net counter reading (target counter reading) together with the direction (R) of the axis run leading to this net counter reading has registered for each track section and at least until the next time this net meter reading occurs and that the correction of the negative deviation of the state of the Net counter of a track section from the given one Target counter reading and the correction of the same amount positive deviation of the level of the net counter of one Neighboring track section from its target counter reading also occupied other neighboring track section if one Occurrence of a status of the target counter reading Net counter of this other neighboring track section saved and the co-stored direction (R) of the axis passage from this other neighboring track section towards that Track section points, the net counter reading the negative Deviation from its target counter reading shows.   3. The method according to claim 2, characterized in that a Correction of the negative deviation of the level of the net meter a track section from its target counter reading to this Target counter reading and a correction of the positive deviation of the Status of the track section adjacent to the direction of travel assigned net counter also takes place if the net counter of the in the direction of travel adjacent track section in their Amount higher positive deviation from its target counter reading than the negative deviation is and that the value is around which the positive deviation is corrected, the negative one Deviation corresponds.