RU2273582C2 - Method of checking non-occupancy of rail line - Google Patents

Method of checking non-occupancy of rail line Download PDF

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Publication number
RU2273582C2
RU2273582C2 RU2004116748/11A RU2004116748A RU2273582C2 RU 2273582 C2 RU2273582 C2 RU 2273582C2 RU 2004116748/11 A RU2004116748/11 A RU 2004116748/11A RU 2004116748 A RU2004116748 A RU 2004116748A RU 2273582 C2 RU2273582 C2 RU 2273582C2
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RU
Russia
Prior art keywords
rail line
occupation
voltage
threshold
rail
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RU2004116748/11A
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Russian (ru)
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RU2004116748A (en
Inventor
Юрий Иосифович Полевой (RU)
Юрий Иосифович Полевой
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Самарская государственная академия путей сообщения (СамГАПС)
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Priority to RU2004116748/11A priority Critical patent/RU2273582C2/en
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Abstract

FIELD: railway transport; signaling and communication.
SUBSTANCE: invention relates to interval control of traffic. According to proposed method ac voltage is supplied to middle of rail line and information of running voltages is received at ends of line and, basing on this information occupation or clearing of rail line is revealed. If occupation threshold exceeds ratio of voltage of rail line input end to voltage of output end, rail line is considered occupied. Used as occupation threshold is occupation coefficient. Clearing of rail line is recorded if several conditions are met: equality of voltage at ends of rail line at current of supply end exceeding threshold current and than at excess of ratio of voltages of rail line output end to voltage of input end over clearing threshold are checked. Clearing coefficient is used as clearing threshold, and occupation of rail line following in direction of running is recorded.
EFFECT: improved reliability of checking condition of rail lines.
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Description

The invention relates to railway equipment, namely to railway automation and telemechanics, and can be used to regulate the movement of trains.

A known method of controlling the freeness of a rail line, which consists in determining the number of free rail lines on the haul and the sum of the voltage values on the same lines, and then find the arithmetic mean value of the stresses. The current value of each of the lines is compared with the arithmetic mean value. With a significant difference between the current value and the arithmetic average, the busyness of the track section is recorded, otherwise, it is free [RF Patent No. 2025358, IPC B 61 L 23/16. A method of controlling the freedom of track sections and a device for its implementation. Authors: Polevoy Yu.I., Streltsov S.K., Mazalova I.V., Kravtsova N.A., BI No. 24, 1994].

The disadvantage of this method is that in the presence of significant longitudinal asymmetry, false control of the state of the rail line is possible.

A known method of controlling the freedom of rail lines, which consists in the fact that the value of the current voltage at the receiver is compared with threshold voltage values. The excess of the current voltage over the threshold value is recorded as the freedom of the rail line, otherwise - employment [Kotlyarenko N.F. Track lock and auto adjustment. - M .: Transport, 1983, pp. 145-159].

This technical solution is selected as a prototype.

The disadvantage of this method is that with a reduced insulation resistance, false monitoring of the condition of rail lines is possible.

The technical result to which this invention is directed is to increase the reliability of monitoring the condition of the rail line.

The technical result is achieved by the fact that the method of controlling the freedom of the rail line, which consists in the fact that in the middle of the rail line an AC voltage is supplied, and at the ends, information about current voltages is received and the occupation or release of the rail line is recorded, and the occupation is fixed when the occupation threshold is exceeded the ratio of the voltage of the input end of the rail line to the voltage of the output, and as the occupation threshold, the occupation coefficient is taken, the release of the rail line is fixed when several Under these conditions, they control the equality of stresses at the ends of the rail line when the supply end current exceeds the threshold current, then when the ratio of the voltages of the output end of the rail line to the input voltage over the release threshold is exceeded, and the release coefficient is taken as the release threshold and the occupation of the next train rail line.

Figure 1 shows a diagram of a rail line. Figure 2 shows graphs of the dependencies of the stresses at the ends of the rail line and the current of the power source from the coordinates of the regulatory shunt.

Figure 1 shows a rail circuit containing a track generator 1 connected through resistors 2 (current limiter of the supply end) and 3 (cable resistance equivalent) to the first winding of the first matching transformer 4, to the second winding of which the left part 5 of the rail line is connected, to the second end of which, through the second matching transformer 6, resistor 7 (equivalent cable resistance), band-pass filter 8 (protection against signal currents of adjacent rail circuits), rectifier 9 (rectifier bridge and smoothing capacitor), analog-to-digital Converter (ADC) 10 connected to the first input of the computer 11. To the second winding of the first matching transformer 4 is also connected to the right side 12 of the rail line, to the other end of which through the third matching transformer 13, resistor 14 (equivalent cable resistance), bandpass filter 15 , the rectifier 16 and the ADC 17 is connected to the second input of the computer 11. To the poles of the resistor 2 through the bandpass filter 18, the rectifier 19, the ADC 20 is connected to the third input of the computer 11.

Figure 2 shows the curves representing the dependence on the coordinate of the shunt (X W ) voltage at the ends of the rail line (U1, U2) and the current of the power source (I). Curve U1 shows the change in voltage at the first input of the computer, and curve U2 - at the second. Curve I represents the dependence of the power supply current on the coordinate of the shunt at the third input of the computer. Points G, P1, P2 indicate respectively the connection points to the rail line of the generator, left and right receivers. Points Z and O are the coordinates of the fixation points of the occupation and the release of the rail line (rail line is a set of parts 5 and 12), respectively. Points Z1 and O1 belong to the curve U1 and correspond to the occupation and release coordinates, respectively. Points Z2 and O2 belong to the curve U2 and correspond to the occupation and release coordinates, respectively. Point R indicates the equality of stresses at the ends of the rail line with a symmetrical arrangement of the regulatory shunt. (With the actual value of the train shunt, the value of which is less than 0.06 Ohms, it is quite difficult to fix the equality of stresses, and therefore the condition of equality of stresses can be replaced by the condition of approximate equality of stresses).

The operation of the device is as follows. From the generator 1 (figure 1) through the resistors 2 and 3, the transformer 4 an alternating voltage is supplied to the rail line. From the receiving end of part 5 of the rail line through a transformer 6, resistor 7, filter 8, rectifier 9 and ADC 10, the converted voltage (binary code, the value of which is proportional to the voltage of the end of part 5 of the rail line) is supplied to the first input of the computer 11. To the second input of the computer 11 information is received about the voltage of the end of part 12 of the rail line through the elements 13, 14, 15, 16, 17 in the same way as it was supplied to the first input of the computer. From the poles of the limiter 2 through the elements 18, 19, 20 to the third input of the computer serves information about the voltage drop across the resistor 2, which is used to determine the current of the power source. The obtained information about the current voltages at the ends of parts 5 and 12 of the rail line and about the current value of the power source is processed on a computer using a program that is designed to monitor the condition of the rail line. Occupancy control is fixed provided that the ratio of the current voltage at the end of the rail line part 5 to the voltage of the end of the rail line part 12 is below the occupation coefficient. 2, this ratio represents the ratio of the lengths of the segments Z1Z and Z2Z. In this example, the occupation coefficient and the release coefficient are taken equal to 0.5 (the coefficient is determined based on the study of the rail line on a computer according to a specially developed program). The release control of the entire rail line (set of parts 5 and 12) is fixed when several conditions are met. When the threshold current of the power source is reached, the equality of voltages at the ends of parts 5 and 12 of the rail line is recorded. The threshold current is the current of the power source with dry ballast and the application of a regulatory shunt at the connection point of the supply transformer 4. Then, the excess ratio of the voltage of the end of the rail part 12 to the voltage of the end of the rail part 5 is monitored, i.e. the ratio of the length of the O2O segment to the length of the O1O segment, above the threshold release coefficient (0.5). And finally, control the occupation of the next rail line (line to the right of the transformer 13). When all the above conditions are met, the control of the release of the rail line consisting of parts 5 and 12 is fixed.

The proposed method improves the safety of train traffic due to the higher reliability of monitoring the state of the rail line.

Claims (1)

  1. A method for controlling the freedom of a rail line, namely, that AC voltage is applied to the middle of the rail line, and information about current voltages is received at the ends and the occupation or release of the rail line is recorded, characterized in that the occupation is fixed when the occupation threshold is exceeded over the input voltage ratio the end of the rail line to the output voltage, and the occupation coefficient is taken as the occupation threshold, the release of the rail line is fixed when several conditions are met, control equality of stresses at the ends of the rail line at a supply end current exceeding the threshold current, then when the ratio of the voltage of the output end of the rail line to the input voltage exceeds the release threshold, and the release coefficient is taken as the release threshold and the occupation of the next rail line along the train is taken.
RU2004116748/11A 2004-06-01 2004-06-01 Method of checking non-occupancy of rail line RU2273582C2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
RU2004116748/11A RU2273582C2 (en) 2004-06-01 2004-06-01 Method of checking non-occupancy of rail line

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
RU2004116748/11A RU2273582C2 (en) 2004-06-01 2004-06-01 Method of checking non-occupancy of rail line

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2457136C2 (en) * 2010-06-16 2012-07-27 Государственное образовательное учреждение высшего профессионального образования "Самарский государственный университет путей сообщения" (СамГУПС) Method of controlling track state

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
КОТЛЯРЕНКО Н.Ф. Путевая блокировка и авторегулировка. - М.: Транспорт, 1983, с.145-159. *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2457136C2 (en) * 2010-06-16 2012-07-27 Государственное образовательное учреждение высшего профессионального образования "Самарский государственный университет путей сообщения" (СамГУПС) Method of controlling track state

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Effective date: 20070602