RU2418706C1 - Device to control track non-occupancy - Google Patents

Abstract

FIELD: transport.

SUBSTANCE: invention relates to railway ACS and telemetry and may be used for controlling track non-occupancy. Control device comprises track generator 1, limiting resistor 2, two track transformers, first band filter 7, first track rectifier 8, first ADC 9, second band filter 12, second track rectifier 12, second ADC 13, isolating joints and track line 19. Additionally, device incorporates track receiver 10, track coils and extra generator 11. Note here that track generator is connected via limiting resistor and first track transformer 3 to one end of track. Second track receiver is connected to second end of said track via second track transfer 8, first track rectifier and first ADC. Track coils are connected to second track receiver via second ADC, second track rectifier and second band filter. Said track coils are located at the center of aforesaid track. Auxiliary generator is connected to mid pints of secondaries of track transformers.

EFFECT: increased controlled track length and shut sensitivity, reduced tolerable insulance.

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Description

The invention relates to railway automation and telemechanics and can be used to monitor the condition of the rail line.

A device is known that implements a method for controlling the freeness of a rail line, selected as an analogue, comprising a track generator, a limiting resistor, a switching device, resistors and matching transformers, rail lines, a first bandpass filter, a first rectifier, a first analog-to-digital converter, and an electronic computer , a second band-pass filter, a second rectifier, a second analog-to-digital converter, a control circuit [RF patent No. 2361765 C1, IPC B61L 23/16. A method for controlling the freedom of a rail line and a device for its implementation. Authors: Polevoy Yu.I., Vaishnaras A.V. July 20, 2009].

The disadvantage of this device is the low shunt sensitivity at low values of insulation resistance.

A device is known that implements a method for controlling rail line freeness, comprising a track generator, a limiting resistor, a switching device, resistors and matching transformers, rail lines, a first bandpass filter, a first rectifier, a first analog-to-digital converter, an electronic computer, and a second bandpass filter ( two-way, transmitting signal and additional frequencies), a second rectifier, a second analog-to-digital converter, a control circuit [RF patent No. 2362699 C1, IPC B61L 23/16. A method for controlling the freedom of a rail line and a device for its implementation. Authors: Lisenkov V.M., Bestemyanov P.F., Polevoy Yu.I., Vayshnaras A.V. July 27, 2009].

The disadvantage of this device is that with a large length of the rail line and low insulation resistance, false monitoring of the condition of the track sections is possible.

This technical solution is selected as a prototype.

The technical result is an increase in the controlled length of the rail line, an increase in shunt sensitivity, a decrease in the allowable insulation resistance due to continuous monitoring of the insulation resistance value.

The specified technical result is achieved by the fact that in the device for monitoring the condition of the rail line containing a track generator, a limiting resistor, two track transformers, a first bandpass filter, a first track filter, a rectifier, a first analog-to-digital converter, a second bandpass filter, a second track rectifier, a second analog -digital converter, insulating joints, rail line, a track receiver, track coils and an auxiliary generator are additionally introduced, and the track generator through limiting a resistor and a first track transformer are connected to one end of the rail line, to the other end of which a second track receiver is connected to the other via a second track transformer, a first band-pass filter, a first analog-to-digital converter, and a second analog-to-digital converter, to a second track rectifier, a second bandpass filter, track coils located in the middle of the rail line are connected in series, the auxiliary generator is connected to the midpoints of the secondary s travel winding transformers.

The introduction of an additional auxiliary generator, track coils, track receiver will allow continuous continuous monitoring of the insulation resistance, even if there is a shunt on the rail line, and thereby increase the controlled length of the rail line, increase the shunt sensitivity, and reduce the permissible insulation resistance.

The drawing shows a block diagram of a device.

The device comprises a track generator 1, a limiting resistor 2, a first track transformer 3, a first track coil 4, a second track coil 5, a second track transformer 6, a first bandpass filter 7, a first track rectifier 8, a first analog-to-digital converter 9, a track receiver 10 , auxiliary generator 11, second band-pass filter 12, second track rectifier 13, second analog-to-digital converter 14, insulating joints 15, 16, 17, 18, rail line 19.

The path generator 1 through the limiting resistor 2 and the first path transformer 3 is connected to one end of the rail line 19, to the other end of which through the second path transformer 6, the first bandpass filter 7, the first path rectifier 8, the first analog-to-digital converter 9 is connected to the second track receiver 10, to which, through the second analog-to-digital converter 14, the second path rectifier 13, the second bandpass filter 12, the first 4 and second 5 path coils, which are located in the middle of the rail th line 19. The midpoints of the secondary windings of the first 3 and second 6 track transformers are connected to the auxiliary generator 11.

The device operates as follows. At the output of the path generator 1, a signal is generated with a frequency f ₁ , which is fed through the limiting resistor 2 to the input of the first path transformer 3, from the output of which the signal enters the rail line 19, bounded by insulating joints 15, 16, 17, 18 and is received by the second path transformer 6, the output of which a signal through a first bandpass filter 7, a rectifier 8, a first track, a first analog-to-digital converter 9 to a first input track receiver 10. The signal with the frequency f ₂ generated at the output of the auxiliary re iterator 11, enters the midpoint of the secondary winding of the first track transformer 3, where it is divided into two signals of the same magnitude and frequency and, passing through the rail line 19, enters the midpoint of the secondary winding of the second track transformer 6, combines into one signal and returns to the auxiliary generator 11. in the middle of the railway line 19 are travel coils 4 and 5. The signal with frequency f ₁ from the track generator 1 passes through rail thread induces in the coil 4 of the first track and the second track coil 5 EMF koto s directed counter, so they cancel each other out when added. The signal with a frequency f ₂ from the auxiliary generator 11 passes along the rail threads in one direction, has the same sign, therefore, the EMF induced from it in the first track coil 4 and the second track coil 5 are added and fed to the input of the second band-pass filter 12, from the output of which the second path rectifier 13, the second analog-to-digital converter 14 are fed to the second input of the receiving device 10. The second analog-to-digital converter 14, having received a signal at its input, generates an insulation resistance value at the output and before this value is also input to the second track receiver 10.

In the track receiver 10, the occupation and release thresholds are determined by calculation, compared with the current value, determining the state of the rail line. The threshold values are continuously corrected by the constantly determined value of the insulation resistance, both in the presence of a train on the rail line 19 and in the absence thereof, which in turn increases the controlled length of the rail line.

The proposed device will increase the controlled length of the rail line, increase the shunt sensitivity and lower the allowable insulation resistance.

Claims (1)

A rail line condition monitoring device comprising a path generator, a terminating resistor, two path transformers, a first bandpass filter, a first path rectifier, a first analog-to-digital converter, a second bandpass filter, a second path rectifier, a second analog-to-digital converter, insulating joints, a rail line characterized in that the track receiver, track coils and auxiliary generator are additionally introduced, the track generator through a limiting resistor and a first track track the formulator is connected to one end of the rail line, to the other end of which, through the second track transformer, the first bandpass filter, the first track rectifier, the first analog-to-digital converter, the second track receiver is connected to which through the second analog-to-digital converter, the second track rectifier, the second strip the filter is connected in series to the track coils, which are located in the middle of the rail line, the auxiliary generator is connected to the midpoints of the secondary windings of the track transformer in.