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(e.g.: eddy current sensors, capacitive sensors, CCD sensors, Encoders, fibre-optic
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New Noncontact Displacement Sensor for
National Instruments CompactRIO System |
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Lion Precision: The new ECD140 sensor, scheduled for release in
Q4 2009, will add displacement and position data to test, measurement,
and control systems designed around National Instrument’s CompactRIO
architecture. Based on eddy-current (inductive) sensing technology, the
new sensor provides displacement measurements of conductive targets with
sub-micron resolutions and measurement ranges of 2mm to 3.5mm. Other
ranges are also available upon request. A fully functional ECD140 will
be demonstrated during NI Week in Austin, Texas August 4-6 (www.ni.com/niweek).
The CompactRIO system from National Instruments is an open, expandable
system powered by LabVIEW. The system allows hot swapping of a multitude
of modules to quickly configure a data acquisition system. No other
noncontact displacement sensor module is available for the CompactRIO
system ... |
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Turbocharger speed sensor for high volume
production |
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 New
from Micro-Epsilon is a range of turbocharger speed sensors for
high volume production. The turboSPEED TSSC series of sensors operates
according to the eddy
current principle and so provide several benefits. The sensor is
cast in plastic and has a separate electronics unit, which can be
integrated in the engine compartment separate from the turbocharger.
Speeds of 200 to 400,000rpm can be measured accurately with the sensor.
Due to the complex electronics and special linearisation, the sensor can
measure on turbine wheels made from aluminium or titanium. Titanium is
well known as a poor electrical conductor and is therefore generally
difficult to measure. The electronics for each turbine model is
configured and fixed afterwards for high precision. The low cost version
of the sensor meets all necessary requirements for the
automotive industry. The housing is protected to IP67; the
electronics complies with the EMC requirements in the engine
compartment. Different from conventional sensors for turbochargers, the
new sensor does not measure on the shaft between the two turbine wheels,
since these are often no longer accessible with the latest
turbochargers. The turboSPEED TSSC detects the edge of the compressor
wheel on the “cold” side of the turbocharger ... |
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A
selection of recently
published
technical articles & products
in the field of:
eddy
current
sensors |
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Find
all manufacturers and suppliers of eddy current sensors |
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High-Performance Eddy Current Sensor
Offers Improved Displacement Measurements |
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 Lion
Precision: The ECL101 Eddy-Current displacement sensor is an
improved, CE compliant version of Lion Precision’s original ECL100
sensor. The ECL101 noncontact sensor offers improvements in immunity to
electromagnetic interference (EMI) and thermal stability as well as
lower power consumption. The linear output sensor is available with a
selection of probes offering measurement ranges from 0.5mm to 15mm, and
features a unique front panel range indicator to alert the operator to
out-of-range conditions. The sensor has applications in any industry
requiring precision noncontact displacement measurement, especially in a
hostile environment involving fluids or debris in the measurement area ... |
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New measuring principle for low cost
displacement sensors |
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 Micro-Epsilon
has developed a completely new displacement measurement principle with
its new Magnetic Displacement Sensor (MDS). In contrast to the widely
used Hall Effect principle, the MDS is based on a method patented by
Micro-Epsilon, which is based on a linear relationship between the
position of the magnet and the output signal. As printed coils are used
for this measurement principle, the manufacturing method does not depend
on semiconductor processes. This makes customer-specific adaptations
considerably easier. The sensors have an extremely high basic
sensitivity, which enables a very simple and low cost evaluation
circuit. With an eddy current sensor as the technological core, very
fast, high resolution versions can be achieved. Compared to Hall Effect
sensors, much larger measuring ranges (currently 60mm limit) can be
achieved. In addition, significantly smaller magnets are required as the
target. ... |
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Customer-specific eddy current sensors
for OEMs |
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 Micro-Epsilon
provides extremely flexible solutions in the area of eddy current
sensors for OEM applications. This flexibility ranges from cost-optimised
sensor systems with highly integrated electronics through to innovative
sensors with silver/palladium coils embedded in glass/ceramic. In this
way, these sensors achieve high levels of temperature stability and
service life that were previously not possible. The sensors can also be
used in the most difficult operating conditions (pressure, temperature,
aggressive media, high vacuum). The sensors are easily adapted in terms
of form, size and design. Separate electronics is not necessary as all
the sensor’s electronic components can be incorporated in the
multiple-layer ceramic substrate. Therefore, solutions with detached and
with integrated electronics are now possible. Sensors with a
glass/ceramic substrate are intended for applications in aerospace and
defence, semiconductors, power station construction or for industrial
applications with high loads. The sensors can also be used in clean
rooms or in an ultra-high vacuum as they are hermetically-sealed and
offer correspondingly low gas emission rates. Micro-Epsilon therefore
provides a cost-efficient solution for OEMs to develop and supply eddy
current sensors for individual ... |
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Eddy current sensors in tribology testers |
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 Eddy
current sensors from Micro-Epsilon are once again being used in a
new high-performance test system at the Institute for Tribology at the
Clausthal Technical University. The new tester, which is currently under
construction, will be used to examine the tribological, flow mechanics
and rotor dynamic processes of highly loaded sliding bearings at maximum
circumferential speeds of the shaft. Based on previous positive
experiences with Micro-Epsilon eddy current sensors used on existing
testers for examining hydrodynamic radial plain bearings or plain
bearings with particularly high loads, eddyNCDT series sensors will also
be used in the new tester. In doing so, the shaft reaches
circumferential speeds of up to 200m/s; conventional test systems
achieve a maximum of 120m/s. The position of the test bearing housing
and the relative movement between the rotor and the test bearing is
detected in the tester using eddy current displacement sensors. The
bearing gap of the plain bearing between bearing surface and rotor is
also measured using eddy current sensors. Or this, 22 sensor channels
will be integrated in the test structure. Miniature eddyNCDT sensors
with 0.5mm measuring range are used due to their high cut-off frequency
and high resolution. Another key criterion is the sensor’s small
installation footprint. Therefore, measuring points for very tight
installation requirements are possible without requiring any disruptive
modifications to the test design. High environmental compatibility is
also a key reason for selecting eddy current sensors: oil or water in
the measuring gap, high temperatures or strong electromagnetic
interference ... |
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Micro-Epsilon receives large sensor order
for segmented reflector telescope |
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 Sensor
specialist Micro-Epsilon has received an order from the Chinese
Academy of Science to supply 600 eddy current sensors to the largest
Chinese reflector telescope LAMOST (Large Sky Area Multi-Object Fibre
Spectroscopic Telescope). The telescope is located in the Chinese
observatory Yinglong Station near Peking. LAMOST is a new type of
segmented reflector telescope for the spectroscopic surveying of space.
A primary mirror receives the light from space and directs it to a
correction mirror, which is in the focus of the primary mirror. The
corrector, in turn, bundles the light information on an optical element
such as, in this case, the fibre optic cable. The telescope has a
primary mirror diameter of approx. 4m. The primary mirror and corrector
comprise 46 or 24 individual mirror segments. The segments can be moved
and can therefore be adjusted to different receiving angles between -10°
and +90°. Due to the high optical resolution, the mirrors must be
precisely aligned with each other. 600 eddy current sensors from
Micro-Epsilon are used to achieve the required precision. The sensors
were selected because of their sub-nanometre resolution ... |
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Noncontact position sensor exploits FPGA
technology for higher performance |
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The new ECL202 eddy-current displacement/position sensor has
significantly improved thermal stability and immunity to electromagnetic
interference (EMI) as well as improved linearity and resolution. The
sensor employs FPGA technology enabling complex, proprietary
mathematical algorithms to achieve higher performance levels than purely
analog methods. According to Don Martin, president of Lion Precision,
“Using FPGA digital processing techniques, we can achieve performance
that simply is not possible with discrete analog electronics.” Digital
technology can very precisely detect the sensor’s signal and more easily
differentiate it from other electrical signals present in the sensing
environment. This means the sensor continues to work well in
electrically noisy environments such as near motor controllers or other
high-power switching electronics. Using this same proprietary method,
multiple ECL202 sensors can be positioned near each other without the
mutual interference usually experienced with eddy-current sensors. ... |
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All manufacturers and suppliers of eddy current sensors |
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