Patent CZ-20041148-A3 (CZ)
Title: Method of safe assessment of freedom of a track section with respect to increase resistance to disturbing affects and a track circuit arrangement for making the method
Inventor: FARAN ANTONIN
IPC: B61L21/06
Filed: 2004-11-26
Abstract: The present invention relates to a method of safe assessment of vacancy of a track section with regard to increase of resistance to spurious effects, where a the track circuit (KO), intended for assessment of a railway vehicle (KV) in a certain track section (KU), is formed by a feeding end (NK) and a receiver end (PK), wherein the method is characterized in that a voltage correction component (KSN) as well as contractually deformed voltage component (SDN) are supplied in the track circuit. At the same time, a voltage spurious component (RSN) penetrates into the track circuit (KO) due to spurious effects (RV). Consequently, by superposing these voltages (KSN, SDN, and RSN) a track voltage (UK) is generated. said track voltage (UK) is then subjected to mathematical analysis in a first channel receiver (KP1) to m-th channel receiver (KPM) by the action of both a reference voltage (RN) and a control voltage (CN) intended for controlling time characteristic of said contractually deformed voltage (SDN), to thereby safely suppressing the voltage spurious component (RSN) below a required limit, and at the same time, there is assessed a vacancy of the track section (KU) including accidental state of the track circuit (KO) or occupancy thereof by a railway vehicle (KV) based on amplitude and phase of the track voltage (UK) relative to amplitude and phase of the reference voltage (RN) and time characteristic of the control voltage (CN). Subsequently vacancy of the track section (KU) is identified by assessment of a first channel output (V1) of the first channel receiver (KP1) to the m-th channel output (VM) of the m-th channel receiver (KPM) in the output assessment unit (JVV) using a method of two from two to two from m channel outputs. Disclosed is also a track circuit arrangement for making the above-described method of safe assessment of vacancy of a track section with regard to increase resistance to spurious effects wherein the invented track circuit arrangement is characterized in that the first terminal (ZNN-1) of a supply voltage source (ZNN) is connected to a third terminal (KP1-3) of a first channel receiver (KP1), to a third terminal (KP2-3) of a second channel receiver (KP2) and to a third terminal (KPM-3) of an m-th channel receiver (KPM), the second terminal (ZNN-2) of said supply voltage source (ZNN) is connected to a fourth terminal (KP1-4) of the first channel receiver (KP1), to a fourth terminal (KP2-4) of the second channel receiver (KP2) and to a fourth terminal (KPM-4) of the m-th channel receiver (KPM), the third terminal (ZNN-3) of said supply voltage source (ZNN) is connected to a first terminal (ZSDN-1) of a contractually deformed voltage (SDN) source (ZSDN), the fourth terminal (ZNN-4) of said supply voltage source (ZNN) is connected to a second terminal (ZSDN-2) of said contractually deformed voltage (SDN) source (ZSDN), the third terminal (ZSDN-3) of said contractually deformed voltage (SDN) source (ZSDN) is connected to a first terminal (KR-1) of a control element (KR), The fourth terminal (ZSDN-4) of said contractually deformed voltage (SDN) source (ZSDN) is connected to a second terminal (KR-2) of said control element (KR), the fifth terminal (ZSDN-5) of said contractually deformed voltage (SDN) source (ZSDN) is connected to a second terminal (PC-2) of a current sensor (PC), the sixth terminal (ZSDN-6) of said contractually deformed voltage (SDN) source (ZSDN) is connected to a first terminal (PC-1) of said current sensor (PC), the seventh terminal (ZSDN-7) of said contractually deformed voltage (SDN) source (ZSDN) is connected to a second terminal (KO-2) of the track circuit (KO) further to the fourth terminal (PC-4) of said current sensor (PC), The eighth terminal (ZSDN-8) of said contractually deformed voltage (SDN) source (ZSDN) is connected to a first terminal (PZK-1) of a complex-nature pre-load in series with a first switch (KR1) of the control element (KR) to the first terminal (KO-1) of the track circuit (KO), the third terminal (PC-3) of said current sensor (PC) is connected to a second terminal (PZK-2) of the complex-nature pre-load (PZK), the first terminal (ZCN-1) of a control voltage source (ZCN) is connected to the first terminal (KP1-1) of the first channel receiver (KP1) further to the first terminal (KP2-1) of the second channel receiver (KP2) and to the first terminal (KPM-1) of the m-th channel receiver (KPM), the second terminal (ZCN-2) of said control voltage source (ZCN) is connected to the second terminal (KP1-2) of the first channel receiver (KP1), further to the second terminal (KP2-2) of the second channel receiver (KP2) and to the second terminal (KPM-2) of the m-th channel receiver (KPM), the third terminal (KO-3) of said track circuit (KO) is connected to the first terminal (RV-1) of spurious effects (RV), the fourth terminal (KO-4) of said track circuit (KO) is connected to the second terminal (RV-2) of the spurious effects (RV), the fifth terminal (KO-5) of said track circuit (KO) is connected to the fifth terminal (KP1-5) of the first channel receiver (KP1), further to the sixth terminal (KP2-6) of the second channel receiver (KP2) and to the sixth terminal (KPM-6) of the m-th channel receiver (KPM), the sixth terminal (KO-6) of the track circuit (KO) is connected to the sixth terminal (KP1-6) of the first channel receiver (KP1), to the fifth terminal (KP2-5) of the second channel receiver (KP2) and to the fifth terminal (KPM-5) of the m-th channel receiver (KPM), the seventh terminal (KP1-7) of the first channel receiver (KP1) is connected to the second terminal (JVV-2) of the output assessment unit (JVV), the eighth terminal (KP1-8) of the first channel receiver (KP1) is connected to the first terminal (JVV-1) of said output assessment unit (JVV), the seventh terminal (KP2-7) of the second channel receiver (KP2) is connected to the fourth terminal (JVV-4) of said output assessment unit (JVV), the eighth terminal (KP2-8) of the second channel receiver (KP2) is connected to the third terminal (JVV-3) of said output assessment unit (JVV), the seventh terminal (KPM-7) of the m-th channel receiver (KPM) is connected to the sixth terminal (JVV-6) of said output assessment unit (JVV), and the eighth terminal (KPM-8) of the m-th channel receiver (KPM) is connected to the fifth terminal (JVV-5) of said output assessment unit (JVV).