Industrial Training Presentation (Central Electronics Limited)

Name . Ramakant TyagiRoll No. 1219431055Session . 2012-16

Department of Electronic & Communication Engineering H.R INSTITUTE OF TECHNOLOGY , GHAZIABAD(U.P)

COMPANY PROFILE TYPE :PUBLIC SECTOR UNDERTAKING(PSU)

FOUNDED IN : 1974

HEADQAURTERS : NEW DELHI, INDIA KEY PERSONS : Dr. NALIN SINGHAL  (Chairman & Managing director)

INDUSTRY : ENGINNERINGPRODUCTS: Solar Photovoltaic, Railways Electronic, Ceramics WEBSITE : www.celindia.co.in

Cel Unit and LocationCentral Electronics Limited (CEL) manufacturing unit is located in Sahibabad, district Ghaziabad in state of Uttar Pradesh. and has been producing Solar Photovoltaic, Railways Electronic, Ceramics .

CEL has developed a number of critical components for strategic applications and is supplying these items to Defence Industry. CEL is ISO-9001:2008 & ISO-14001:2004 certifications company, backed by a strong group of high dedicated and well qualified R&D team and has a production plant with an established capacity of 13 MW per year

* Axle Counter *An axle counter is a device on a railway that detects the passing of a train between two points on a track.

*A counting head (or 'detection point') is installed at each end of the section, and as each train axle passes the counting head at the start of the section, a counter increments.

*Axle Counter

*COUNTS AXLES*COUNTS AXLES IN AND OUT OF SECTION

*CLOSE LOOK AT TRACK DEVICE INSTALLATION

Transmitter coils

Receiver coils

Base

Clamp

*INTRODUCTION CON…

*A detection point comprises two independent sensors, therefore the device can detect the direction and speed of a train by the order and time in which the sensors are passed. As the train passes a similar counting head at the end of the section, the counter decrements. If the net count is evaluated as zero, the section is presumed to be clear for a second train.

*Initially axle counters were imported from Germany to gain experience and to evaluate their suitability for adoption on Indian Railways.

*Mark-I model was introduced in Indian Railways after extensive laboratory and field trials under various conditions. Later stage based on the field feedback, two models of axle counters known as single entry/exit (RDSO Mark-II) axle counter and Multi entry/exit axle counter were emerged and after extensive laboratory and field trials under various conditions, the design was finalized and commercialized through private sector as well as public sector

*Based on the feedback from field, a new axle counter has been developed by RDSO, known as “UNIVERSAL AXLE COUNTER”. It is universal system up to four entry / exit points of one section of straight road or Points zone portion and number of entry/ exit points are easily convertible at site as per the required application.

*Track Device Assembly

*COUNTING OF AXLES

•Earlier Axle counters only monitored the amplitude of the signal from detectors.

•Present versions monitor both amplitude and phase. This gives additional discrimination between presence and absence of wheels

*HOW IT WORKS AS TRACK CIRCUIT

*IF AXLES IN NOT EQUAL TO AXLES OUT THEN SECTION OCCUPIED

IN = 50 OUT = 0

SECTION IS OCCUPIED

IN = 50 OUT = 50

SECTION IS CLEAR

IN = 50 OUT = 40

*DETECTION OF DIRECTION

•Detection of direction of movement is important and it is done by having two detectors adjacent to each other. •Depending on the direction of movement the sequence of dips of the two detectors changes.

A B

A

B

Dip of A precedes that of B

A B

A

B

Dip of B precedes that of A

Time

Signal

*TYPICAL AXLE COUNTER

INDOOR EQUIPMENTCARDFILE

Input Card

Logic Card

Output Card

Power supply

*Advantages

* An axle counter system can cover a very long section up to 15 Kms.

*It does not get affected either by flooding of track or poor maintenance of tracks unlike the track circuit, which is highly susceptible to these conditions.

*Efficiency and safe working of axle counters does not depend

up various track parameters and climate condition such as

length, ballast condition, drainage, stray voltage and currents,

track feed voltage and lead cables, etc. like track circuits.

*Applications * Axle counters have been finding more and more uses on

modern safety signaling systems in railwaysThese are being used presently for the following :-

a) Automatic Signaling systems.b) Level-crossing warning system using axle counter.c) Monitoring of berthing tracks in station areas and yards.d) Intermediate Block Signaling in Double line sections .