The document presents a detailed overview of Central Electronics Limited (CEL), a public sector undertaking founded in 1974, specializing in engineering products such as solar photovoltaic and railway electronics. It explains the functionality of axle counters used in railways, including their evolution, design improvements, and applications in safety signaling systems. Additionally, it highlights that CEL's manufacturing unit is located in Ghaziabad and is certified with ISO standards for quality and environmental management.

1. Industrial Training Presentation
(Central Electronics Limited)
Name . Ramakant Tyagi
Roll No. 1219431055
Session . 2012-16
Department of Electronic & Communication Engineering
H.R INSTITUTE OF TECHNOLOGY , GHAZIABAD(U.P)

2. COMPANY PROFILE
TYPE :PUBLIC SECTOR UNDERTAKING(PSU)
FOUNDED IN : 1974
HEADQAURTERS : NEW DELHI, INDIA
KEY PERSONS : Dr. NALIN SINGHAL
(Chairman & Managing director)
INDUSTRY : ENGINNERING
PRODUCTS: Solar Photovoltaic, Railways Electronic, Ceramics
WEBSITE : www.celindia.co.in

3. Cel Unit and Location
Central 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

4. *
*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.

5. *
*COUNTS AXLES
*COUNTS AXLES IN
AND OUT OF SECTION

6. *
Transmitter coils
Receiver coils
Base
Clamp

7. *
*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.

8. *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

9. *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.

10. *

11. *
•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

12. *
*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

13. *
•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

14. *
CARDFILE
Input Card
Logic Card
Output Card
Power supply

15. *
* 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.

16. *
* Axle counters have been finding more and more uses on
modern safety signaling systems in railways
These 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 .