FI108016B - signaling - Google Patents

Abstract

The invention relates to a signalling system which exhibits at least two separately arranged detector elements (2 and 4, respectively) which are in each case fed by a separate voltage source (U1 and U2, respectively) and which output indicating signals to a signalling device (5 and 6, respectively) allocated to each detector element (2 and 4, respectively), in which signalling system a monitoring element (10, 19 and 14, 22, respectively) is also allocated to the supply system of each detector element (2 and 4, respectively), which monitoring element, in the event of a voltage failure in the corresponding supply system, outputs an indicating signal to the signalling device (5 and 6, respectively) allocated to the relevant detector element (2 and 4, respectively) in dependence on the supply voltage of the other detector element (4 and 2, respectively). This makes it possible to monitor the failure of a voltage source. <IMAGE>

Description

1 108016

Signaling system

The invention relates to a signaling system.

Signaling systems often use two similar, electrically powered detectors for specific reasons. In track systems they are, for example, wheel sensors. Especially if the messages given by these sensors are important for operational safety, they must also be monitored for proper power supply. The loss of the operating voltage of the detector supply-10 could be detected immediately if such a detector were to produce a permanent signal, e.g. However, many sensors generate signaling signals only in certain operating conditions, so that no signal can be drawn for possible voltage loss.

It is an object of the invention to provide a track signaling system whose detector voltage is supplied in a multichannel manner so that interference detection is technically as easy as possible when a supply voltage is lost.

The critical signaling system for the task is described in claim 1. Thus, this signaling system also uses existing devices to indicate a loss of supply voltage. Therefore, each auxiliary current-25 circuit only needs to be provided with a voltage loss monitoring element.

With very little technical effort, the signaling system of claim 2 is resolved. If 30 separate signaling voltages are used in addition to the detector supply voltages, it is preferable to implement the signaling system according to the features of claim 3.

From a safety point of view, it is reasonable to use the signaling system according to any one of claims 1, 2 or 3, especially when the track systems and detectors are wheel sensors fed by two galvanically separated secondary windings of the 2 108016 transformer. Such wheel sensors are used to investigate the charge status of track sections, so for safety reasons it is necessary to detect an immediate loss of supply voltage to one of the sensors.

Further, it is appropriate to distinguish between the voltage loss notification issued by the monitoring body and other potential input to the signaling device in question. Potential separation is particularly easy with op-10 separators.

The invention will be further illustrated by the following exemplary embodiment.

Figure 1 illustrates a wiring example of a signaling system, Figure 2 shows a wiring example of a signaling system using a separate signaling voltage.

A detector 2 is connected to the terminal 1 of the voltage source U1. The signals 20 provided by the detectors 2 and 4 are similarly connected to the signaling devices 5 and 6. The received signals are either directly or after processing their outputs 7 and 8 in the signaling devices 5 and 6. through a data collection point, for example, to a steering agency.

In addition, a diode portion 9 of opto-isolator 10 is connected to terminal 1 of voltage source UI 10. The switch portion 11 of opto-isolator 10 is connected to a conductor 12 leading from terminal 3 of second voltage source U2 to signaling device 5.

Similarly, the diode portion 13 of the second opto disconnector 14 is connected to the terminal 3 of the second voltage source U2 by a coupling portion 15 of the op-30 disconnector 14 connected to a conductor 16 from the terminal 1 of the voltage source U1.

If either of the voltages U1 or U2 disappears, the opto-disconnector 10 or 14 associated with that voltage source no longer receives voltage so that its switch portion 11 or 15 goes into a non-conductive state. At the same time, the signal at the respective input of the corresponding signal carrier 5 or 6 is turned off. Said signaling device 5 or 6 generates a corresponding notification to one of its outputs 7 or 8 due to signal loss, so that a fault in the voltage source U1 5 or U2 is immediately detected and measures to restore the proper voltage supply can be initiated.

The embodiment illustrated in Fig. 2 illustrates a signaling system that uses a separate signal-10 output voltage U3 in addition to the supply voltages U1 and U2 of the detectors 2 and 4. In this alternative, the opto-disconnectors 19, 22 are connected to each of the opto-disconnectors 10 and 14 connected to the respective supply voltage U1, U2 by their diode terminals 9 and 13. , 22 in parallel with the diode part 18, 21 to the second supply voltage U2, U1.

The coupling part 20, 23 of the opto-isolator 19, 22 is connected from the terminal 17 of the signaling voltage U3 to the conductor 12, 16 leading to the notification input of the signaling device 5, 6.

The signaling voltage U3 is simultaneously used as the supply voltage of the signaling devices 5 and 6.

This switching option works as follows: if one of the supply voltages U1, U2 disappears, the opto-disconnector 10, 14 connected to it no longer receives voltage so that its switch section 11, 15 goes into a non-conductive state. Until then, switching part 11, 15 short-circuits the diode part 18, 21 of the second opto-disconnector 19, 22 and the switching part 20, 23 goes into a conductive state. The signaling device 5, 6 thus receives a signal through the conductor 12, 16. The signaling device 5, 6 30 then gives a corresponding notification of the signal to the data collection point.

Unlike in Figure 1, where the notification is caused by the loss of the signal from the output of the signaling device 5, 6, in the alternatives of Figure 2, the notification is output when the signal 35 enters the signaling device 5, 6.

Claims (6)

Signal system, characterized in that it comprises at least two separate detectors (2, 4) which are measured from different voltage sources (Ui, U2) and which output signals to a signal device (5, 6) in connection with each detector (2). , 4) and in which signal system a control means (10, 19; 14, 22) is connected to the auxiliary circuit of each detector (2, 4), which at a voltage failure in the corresponding auxiliary circuit produces a signal dependent on the other detector ( 4, 2) supply voltage to the signal device (5, 6) adjacent to said detector (2, 4). Signal system according to claim 1, characterized in that the control means is an opto-separator (10, 14), the diode part (9, 13) of which is connected to the auxiliary circuit and switching part (11, 15) of the detector (2, 4). the second detector (4, 2) auxiliary circuit. Signal system according to claim 1, which comprises voltage sources for the detectors having a signal voltage source, characterized in that the control means consists of two opto separators (10 and 19; 14, 22), the diode part of the control means opto-separator (10, 14). (9, 13) is coupled to the auxiliary circuit of the detector (2, 4) and the coupling part (11, 15) is coupled parallel to the diode part (18, 21) of the second detector (19, 22) diode (18, 21) to the second detector (4). , 2) auxiliary circuit, and that a signal voltage (U3) can be connected to a signal length 30 in the signal device (5, 6) adjacent to the detector (2, 4) by means of the coupling part (20, 23) of the opto-separator (19, 22). 4. Signaling system according to claim 1, 2 or 3 for saving plants, characterized in that the detectors (2, 4) are wheel sensors, which are measured galvanically separated by a transformer by two secondary windings. 7 108016 Signal system according to any one or more of the preceding claims, characterized in that the message omitted by the control means differs to the potential from the other signals emitted by said signal device (5, 6). Signal system according to claim 5, characterized in that the potential separation takes place by means of opto-separators.