Method of safe assessment of rail circuit unrestraint with regard to enhanced resistance against perturbing influence and arrangement for making the same

摘要

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 v oltage (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.