Railway Vehicles Controllers & Sensors
Controllers for Electro-Hydraulic Brakes
Successfully
operating
on
Bombardier
Niederflur-Beiwagen
tram
vehicles,
in
the
towns
of
Rostock
and
Leipzig
(Germany).
It
controls
and
monitors
the
brake
equipment,
implementing also the ABS control function.
C-Sigma
C-Sigma s.r.l. 2015
Controller for UIC541-05 Brake Equipments
For
conventional
pneumatic
brake
equipments
the
International
Union
of
Railways
(UIC)
specifies
strict
requirements
to
be
fulfilled
by
any
Wheel
Slip
Prevention
Equipment
(fiche
UIC
541-05).
In
particular,
UIC
541-05
prescribes
the
use
of
independent
watchdogs,
one
for
each
controlled
axles,
and
which
shall
inhibit
any
override
of
the
Main
Brake
Command
issued
by
the
driver,
would
such
an
override
lasts
for
longer
than
10
seconds.
This
is
the
purpose
of
the
UIC
Watchdog
Board,
utilised
in
our
controllers
configured
for
Pneumatic
Brake Equipments conforming to UIC prescriptions.
GPS/GSM-GPRS Rx & Tx Board
Rugged
GPS
Location
Rx
&
Tx
Board,
with
on-board
GSM-GPRS
modem.
Optional
plug-in
for
our
Brake
Controllers,
it
allows
customers
to
add
useful
functionalities,
such
as fleet management and remote diagnostics.
It also features a CAN bus interface, allowing the monitoring of dozens of CAN sensors.
NOTE:
Currently being updated for obsolescence of some of its components.
Digital Multi Feedback Proportional Amplifier for Electro-Hydraulics
A
rugged,
multi-feedback,
digital
proportional
amplifier,
for
the
complete
control of Hydraulic Power Control Units.
The accumulator pressure transducer is monitored for pump on-off control.
The
signal
from
the
brake
pressure
transducer
provides
feedback
for
the
proportional valve PID controller.
Fully Redundant Self-Compensating Hall Effect Absolute Angular Sensor
An
innovative
self-compensating
design,
which
is
not
only
suitable
for
the
demanding
environment
of
outer
space,
but
also
for
rugged
industrial
applications
such
as
railway,
oil & gas, avionics (for applications other than Space, licensing is available).
•
Self compensating configuration of Hall effect probes.
•
Rotary
Magnetics
Design
inherently
stores
angle
position,
no
stand-by
current
needed to retain position information.
•
Purely analogue signal processing (no software).
•
Hollow shaft configuration with 14mm diam. bore.
•
It withstands axial and radial misalignments up to ±0.1 mm
•
0-5V 0-360° sawtooth output.
•
Or
0-5V
4
x
0-90°
sawtooth
+
2
pins
index
D
output
(indexing
the
four
90°
arcs),
for higher accuracy applications.
•
Fully redundant.
Analog Proportional Amplifier Board
Very rugged indeed !
Our
plug-in
(100x160
mm)
analogue
proportional
amplifier
board,
with
4-20mA
isolated
feedback interface.
For the close loop control of proportional valves in electro-hydraulic applications.
Multi-purpose Wheelset Monitoring Board
Implements
our
proprietary
method
of
processing
jitter
on
signals
from
speed
sensors.
On
existing
applications
it
can
monitor
speed
signals
without
interfering
with
them.
Monitoring
jitter
noise
allows
detection
of
wheelset
defects/wearing,
as
well
as
derailment
On-board
3-axes
micro-
accelerometer
allows
correlation
with
“low
frequency”
events.
Combining
speed
sensor
and
micro-accelerometer
data
yields
road
gradient
measurements.
It
naturally
complements
GPS
receiver
boards,
allowing
effective dead reckoning.
A
variety
of
interfaces
are
available
to
suit
most
data
buses:
CAN,
ETHERNET,
USB,
RS232.
On-board
FPC
ZIF
connector
for
direct
driving
of various brands of graphic 128x64 LCDs
Real Time Emulator
A
LabView
based
Emulator,
and
dedicated
Emulator
HW
Unit,
were
developed,
as
to
allow
direct
verification
of
the
efficacy
of
the
ABS
control
algorithm by means of real-time simulations.
Realistic
physical
models
were
translated
into
differential
equations,
then
integrated
in
realtime
(by
the
finite
difference
method,
within
the
LabView
vi
purposely developed for this task), in order to emulate:
•
axles dynamics
•
wheel-rail adhesion curves
•
bogies dynamic front-back differential loading while braking
•
delayed response of electro-valves
•
charge-discharge of pneumatic cylinders
