DD238219A1 - DIAGNOSTIC CIRCUIT ARRANGEMENT FOR MONITORING POINT SOFT LEADING MEANS - Google Patents

Abstract

The invention relates to a diagnostic circuit arrangement for monitoring pairs of oppositely arranged and working in parallel punktfoermigen track switching means for detecting Ausfaellen, z. B. in Achszahlmeldeanlagen. According to the invention, using pulse shapers and counters, an error evaluation and display is carried out separately after failure errors and continuous pulse input errors. The task is solved by doubling the signal path. Logical links are used to assign the error type failure error or continuous pulse output error to a programmable error counter. The error counters are arranged downstream memory, which are occupied only when reaching a predetermined number of successive similar errors and control subsequent displays. The displays allow the early detection of drift or total failures of one of the two track switching devices. The benefit of the diagnostic device is that timely maintenance measures prevent malfunctions in the plants, which are controlled by track switching means. Fig. 1

Description

According to the error counters are arranged downstream of memory, which are occupied only upon reaching a predetermined number of successive similar errors and control subsequent displays. This is necessary because not all cases each wheel exerts an effect on the track switching means by departing Radkränze and by the sinusoidal running of the vehicles on the rails in each case.

The resetting of the axle counter, the error counter and the memory takes place automatically or manually before each new train journey.

According to one embodiment of the invention, the combinational circuit consists of two different logics.

According to the invention, the error type failure errors are evaluated by logical links of the individual signals in the logic 1.

According to the invention, the logic 2 checks the type of fault continuous pulse output error.

According to a further embodiment of the invention, the error counters are programmable. If a programmed number of consecutive identical failure errors is exceeded, according to the invention, these errors can be stored in a memory S1 and in a memory S2 all successive, similar continuous pulse output errors can be stored. Thus, the type of fault can always be recognized by the personnel and targeted maintenance measures initiated.

embodiment

The invention will be explained in more detail with reference to a block diagram of FIG. 1.

After driving the pulse generator, the signals are processed in the pulse shaper stages. By the downstream differentiating the flip-flop is set with the leading edge of the pulse triggered by the first-acting wheel of an axis.

After leaving the point of action, the trailing edge of the pulse resets the flip-flop. The flip-flop controls the counter of the axis-number-signaling system and the error counters.

Logic 1 checks whether the two encoders have worked between the driving and the retraction of the pulse generator.

[Failure error] Logic 2 checks whether both pulse transmitters have returned to their initial position after entering the point of action.

[Continuous pulse output error)

If both pulse generators work properly in both cases, the error counters are reset. In the event of a fault, the reset pulse remains off and the counter remains ready for counting. If the number of errors set for an indication is reached without interruption, the following memory is set, which in turn controls a display.

/ The beginning of the next train ride will reset the entire system.

For example, if the number of errors is programmed to 3 and 2 consecutive errors are detected, the third pulse is again properly counted. detected by both encoders, the error counter is reset and st ready for a renewed work.

Claims (3)

Invention claim: 1. Diagnostic circuit arrangement for monitoring point-shaped track switching means, which are arranged in parallel in the track, preferably for Achszahlmeldeanlagen consisting of a signal path with a Impulsformerstufe and a counter, characterized in that the signal path is doubled such that each track switching means (GM 1 and GM ) is followed by a pulse shaper (If 1 and If 2), which rectangular signals each lead to a differentiator (D 1 D2), in which a subdivision into Impulsvorderflanke and impulse trailing edge is made, the differentiating (D 1 and D 2) a common flip-flop ( FF), which sets the pulse leading edge and resets the pulse trailing edge when leaving the wheel pair from the effective range of the track switching means (G 1 and G 2), the output of the flip-flop (FF) simultaneously with an axis counter (AZ) and one error counter (FZ1 and FZ2) is connected, each of which memory (S 1 and S 2) downstream are associated with a respective error indication (FA 1 and FA2) that the signal outputs of the pulse shaper stages (IF1 and IF2) in a combinational circuit (KS) are logically linked such that in the presence of the complete pulse output of the track switching means (GM 1 or GM2) the error counters (FZ1 and FZ 2) are reset and reset by a reset device (RL) of the axis counter (AZ), the memory (S 1 and S 2) and the error counter (FZ 1 and FZ2). 2. Circuit arrangement according to item 1, characterized in that the combinational circuit (KS) consists of a logic (L1 and L2) such that the logic (L 1) in case of failure of a track switching means (GM 1 or GM 2) the error counter (FZ 1) does not reset and the logic (L2) does not reset the error counter (FZ2) during continuous pulse output of a track switching device (GM 1 or GM 2). 3. The circuit arrangement according to item 1, characterized in that the error counter (FZ1 and FZ2) are programmable such that exceeding the programmed number of consecutive similar failure errors in a memory (S 1) can be stored and the successive similar duration pulse output error in a memory (S2 ) are storable. For this 1 page drawing Field of application of the invention The invention relates to a diagnostic circuit arrangement for monitoring pairs of oppositely disposed and parallel-working point-shaped track switching means, preferably in Achszahlmeldeanlagen for detecting failures of a punctiform track switching means. It is with all paired and parallel working track switching means ' applicable. Characteristic of the known technical solutions Circuit arrangements for monitoring pairs of oppositely disposed and parallel-working punctiform track switching means are z.Z. not known in the art. For example, e.g. when in operation Achszahlmeldeanlagen in case of failure point-shaped track switching means (pulse generator) by drifting of the operating point and by total failures disadvantageous that these malfunctions can not be brought early to the staff for display. This deficiency leads to false counts of the Achszahlmeldeanlage. The consequences are railway operating faults combined with a reduction in availability and operational safety. In zugbedienten Wegübergangssicherungsanlagen (WÜS) is only an error message when a long time existing total failure of a punctiform track switching means occurs. With this known circuit arrangement no short-term total failures and no drift failures of the punctiform track switching means are recognizable. Object of the invention The aim of the invention is to increase the reliability and availability of such systems by early detection of technical failures by a diagnostic circuitry. Explanation of the essence of the invention The invention has as its object to develop a diagnostic circuit for monitoring point-shaped track switching means angordnet pairs in the track and operate in parallel, which allows using impulse converters and counters a fault indication separately after failure errors or Dauerimpulsabgabefehlern. According to the invention the object is achieved in that the signal path is doubled. Each track switching means downstream of pulse shaper in which rectangular signals are generated, which are then each supplied to a differentiator. In them, a subdivision into the pulse leading edge and the pulse trailing edge is made. The differentiating is followed by a common flip-flop, which sets when driving through the first wheel of the axis in the effective range of the track switching means the pulse leading edge, wherein the first this effective range of the track switching means abandoned wheel resets the pulse trailing edge. The flip-flop controls the actual axis counter of the Achszahlmeldeanlage and the two error counter for error detection. Within a combinatorial circuit, the signals are logically linked in such a way that an evaluation is carried out as to whether both track switching means have passed through an entire cycle without error per axis pass. If both track switching means have worked properly, the error counters are reset by the logic circuits.