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An axle counter is a system used in railway signalling to detect the clear or occupied status of a specified section of track. The system generally consists of a wheel sensor (one for each end of the section) and an evaluation unit for counting the axles of the train both into and out of the section.
CEL has also developed axle counter systems that are being used in Railway signaling system for safe running of trains. Railway products include Single Section Digital Axle Counters (SSDAC), High Availability SSDAC (HA-SSDAC), Multi-section Digital Axle Counter (MSDAC) & Block Proving by Axle Counter (BPAC) using Universal Fail Safe Block ...
Illustration of track circuit invented by William Robinson in 1872 Track circuit transformer on the right, new axle counter on the left (Slovenia). A track circuit is an electrical device used to prove the absence of a train on a block of rail tracks to control railway signals. An alternative to track circuits are axle counters.
CBTC is a signalling standard defined by the IEEE 1474 standard. [1] The original version was introduced in 1999 and updated in 2004. [1] The aim was to create consistency and standardisation between digital railway signalling systems that allow for an increase in train capacity through what the standard defines as high-resolution train location determination. [1]
The first deployments of new axle counter systems, which will be interoperable with Argos interlockings, are expected in 2025. Germany (DB Netz): In 2023, DB Netz successfully commissioned a new digital interlocking from Thales, based on NeuPro/EULYNX specifications, on the route between Meitingen and Mertingen. The system features a resilient ...
If the number of axles leaving the block section equals those that entered it, the block is assumed to be clear. Axle counters provide similar functions to track circuits, but also exhibit a few other characteristics. In a damp environment an axle counted section can be far longer than a track circuited one.
D-ATC indicator used on the E233 series trains. The digital ATC system uses the track circuits to detect the presence of a train in the section and then transmits digital data from wayside equipment to the train on the track circuit numbers, the number of clear sections (track circuits) to the next train ahead, and the platform that the train will arrive at.
A CIP consists of 3 main processor modules which perform the safety-critical interlocking functionality. In addition it possesses two communications modules which provide redundant Ethernet connectivity (duplicated for availability) and two digital input modules (duplicated for availability) which can service up to 32 local inputs.