B. I. SHABOTENKO, chief of signaling and communication Southwest Road
C. V. Solovyov, head of laboratory automation and robot AP KIRIKASHVILI, head of the wagon-meter
A feature of the maintenance of modern devices of railway automation and remote control is carrying out numerous measurements in order to monitor compliance with the required parameters of the established norms and identify predotkaznogo state. The timeliness and accuracy of this work depends largely on the reliability of the devices to ensure the safety of trains. Therefore it is quite natural that in this area there is a tendency to improve techniques and methods of measurement and control health devices.
For many years on the road network in accordance with the PTE verification steps devices ALSN travel and stationary radio stations carried out by specially-equipped cars gauges.
Wagon-meter ALSN Southwest road features developed by UO VNIIZhT control and measuring system «Ear», which during operation is constantly being improved. Part of the experience of technical improvement and effectiveness of the device carriage-meter were recorded in the journal «Atis», 1978, and 1982, number 9, number 3.
In recent years, we developed and introduced a device for determining the relative asymmetry of the torque current, and a device for measuring the residual signal at the current frequency code intervals.
At the same time replaced by more sophisticated and other components of the measuring system. These works were carried out in stages, so that was not broken for a long time equipment performance of the car and provides performance measurement schedule of the road segments.
To date, the technical capabilities of the equipment of the car allow you to control the current code, timing asymmetry traction current, residual current in the intervals, and identify defective insulated joints, broken butt connectors, magnetic antinodes, breaks or no coding. In addition, the nature of change is determined by the current lack of a code limiting resistors on the ends of the rail supply chain discrepancy normals transformation ratios throttle transformers.
Detected as measured deficiencies in the maintenance of the devices are documented and sent to the distance with a timetable and removal notice.
In the operation of the devices, these disadvantages have different effects. Some of them are causes permanent disruption of the track circuits and ALSN. When traveling by car precisely identified the problem and the place of its origin. However, most of the identified shortcomings does not lead to termination of the devices at the moment, and is evidence of their non-compliance with established norms and settlement relations, such as shunt or control mode.
In these cases, the data-meter wagon are actually the main source of information on the status of track circuits and track locomotive signaling devices, as indicated type deficiencies can occur at certain coincidence of adverse circumstances. For example, an increase in small code interval to 0.2 seconds, instead of the allowable limit of 0.12 … 0.18 locomotives normally adjusted equipment is not currently lead to failures. But the track circuit no longer has a margin of safety. It may make single failures in the quality of life if it would be a locomotive and deviations from the norm ALSN equipment. By lowering the power supply voltage is also a signal to install or ballast resistance (in translation) pulses are shortened even more, and the intervals will increase, which will already lead to failures ALSN and locomotives normally regulated equipment.
The speed of movement is also a factor which determines the impact of the identified deficiencies have not operation. For example, magnetic antinodes rails and turnouts disrupt ALSN at high speeds, when the interference pulses induced in the receiver coils are such that they cause oscillatory processes in locomotive filters are sufficient to trigger impulse relay amplifiers. At low speeds it is not. For trains following station on a high speed, no coding short track circuit can not lead to failure. But it will inevitably lead to failure at the train moving at low speed.
Therefore distances strict requirements to address in a timely comments after driving the car, regardless of whether there are fixed ALSN failures or not.
Some of the deficiencies identified in the rail chains after driving the car, and the meter is not caused by failure of the locomotive signaling a long time can not be detected by service personnel in a normal schedule process. This applies to rail circuits with the wrong set of transformation coefficients throttle transformer with shorted (because of an error in the installation of a signal point) limiting resistors with a broken spark suppression circuit relay transmitter because of an error in the installation.
Certain shortcomings can be associated with other abnormalities in the service signaling devices. So, the reason for the presence of residual current in the ranges of code at several stations had underestimated the resistance of the cable insulation. At current growth curve we revealed rail station chain derived almost zero limiting resistors, found suction throttle transformer with broken circuit resonant capacitors.
All information received in the car fixed on tapes digital printer devices and recording instruments. These tapes are stored as the document before the next passage of the car on the same site.
Examples of the identified deficiencies are shown in the chart tape samopischuschego powered device (Fig. 1-4).
In the process of measuring instruments in the area of the car a few tens or hundreds of kilometers in a few hours takes quite a considerable amount of information on the status of track circuits. One can clearly talk about a substantial savings in operating costs, if you imagine that this amount of information would have to be produced directly on the spot even with advanced mobile devices.
This is especially true of such works as a measurement timing at the stations, the measurement interval encoding availabilty magnetic antinodes measuring asymmetry traction current across the track circuit, and others. The measurement accuracy of the code of the current in the car can be higher than in the linear conditions when using a galvanometer .
Despite the fact that today the wagon-meter ALSN provides a variety of information on the state floor devices can not be said that the possibility that engineering controls have been exhausted.
Not used yet possible to determine the resistivity of the ballast on the steepness of the rise of the signal current, but work in this direction were carried out.
When equipped with the car control and measuring system «Kolos» certain hopes pinned on the recording device sleepers with low insulation resistance, but due to a number of shortcomings, recognized at the time the authors, the unit that was not involved (as in cars adjacent to the Southwest roads equipped the same system). A track circuit operating experience shows the need for such a device with the possibility of detection of increased conductivity grounding of all buildings connected to the rails.
Therefore, I would like to know whether the network on completion of the development in this respect and what are the practical results of their use?
It seems important and further automation of the measurement process and the issuance of the test results in a form suitable for machine processing.
There are certain organizational difficulties in operational use cars ALSN and radio, common, obviously, for all roads. Since the cars usually operate with passenger train, the possibility of leaving the line is limited by the presence of complete trains. Therefore, not every site can leave at any time of the year. In some areas it is allowed only to cavil postal-luggage trains passing through the stations along the side paths, resulting in not checked coding main roads and sections.
Complex and the procedure of registration of applications for slinging, especially if the car perepritsepka held on a nearby road.
It should therefore be considered appropriate that in all areas have been allocated a train in the schemes which have been provided permanent possibility slinging service and technical cars monitored during movement of the device to ensure traffic safety, and the application for slinging them submitted directly to the passenger service, bypassing manual roads and MEAs.
Interests ensure reliable operation and automatic lock ALSN require continuous improvement of technical means of control, which include wagons meters.