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New Noncontact Displacement Sensor for National Instruments CompactRIO System
 
Noncontact Displacement Sensor

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
 
Turbocharger speed sensorNew 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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eddy current sensors

 

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High-Performance Eddy Current Sensor Offers Improved Displacement Measurements
 
Eddy-Current displacement sensorLion 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
 
Magnetic Displacement Sensor MDSMicro-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
 
Eddy current sensors with AgPd coils in glass/ceramicMicro-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
 
Eddy current sensors in tribology testersEddy 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
 
600 eddy current sensors for the largest Chinese reflector telescope LAMOST (Large Sky Area Multi-Object Fibre Spectroscopic Telescope)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
 
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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