A novel DSP-based LVDT signal conditioner

Ford, Ralph M.; Weissbach, Robert; Loker, David

doi:10.1109/19.930452

Cited by 44 publications

(6 citation statements)

References 3 publications

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“…Air-bearing LVDTs are now available with improved linearities and less damping. Modern LVDTs can have multiple axes [77,78] and use digital signal processing [79] to correct for non-linearities and to compensate for environmental conditions and fluctuations in the control electronics [80].…”

Section: Eddy Current and Inductive Displacement Sensorsmentioning

confidence: 99%

Displacement Measurement

Leach¹

2014

Fundamental Principles of Engineering Nanometrology

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Section: Eddy Current and Inductive Displacement Sensorsmentioning

confidence: 99%

Displacement Measurement

Leach¹

2014

Fundamental Principles of Engineering Nanometrology

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“…Ralph M. Ford , et al [4] presented a DSP-based approach for a typical I/Q demodulator of LVDT signal conditioning. In their system, the position information is akin to the signal to be transmitted and the input sine wave excitation to the LVDT is akin to the carrier wave.…”

Section: State Of the Art Lvdt Conditioning Modulesmentioning

confidence: 99%

An Adaptive Analog Circuit for LVDT’s Nanometer Measurement Without Losing Sensitivity and Range

et al. 2015

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Abstract-A self-adaptive circuit for the linear variable differential transformer (LVDT) has been developed to enhance its nanometer measurement range without loss resolution. By applying a fuzzy-PID controlled programmable gain amplifier array (PGAA) to produce a reference signal, which can adjust itself according to LVDT's core position, the conditioning circuit has ensured the signal to analog-to-digital converter (ADC) varying in a very small interval over full-scale operating range. Thus the sensitivity of the measurement system can be improved without losing measurement range. The simulation result demonstrated the proposed circuit has solved the contradiction between resolution and range, which usually occurs in weak signal detection. Moreover, the signal-to-noise ratio has been ameliorated greatly. Additionally, the DSP-based signal conditioner, which utilizes the self-adaptive circuit, demonstrates the performance of the novel design and nanometer precision is obtained in a wide range.

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“…Usually f C is in the order of 10 kHz to prevent sensor overheating and to ensure good performances. Two basic methods are available to estimate m(t): the ratio-based method [3] and the synchronous demodulation method [2].…”

Section: A Displacement Sensors and Measuring Algorithmmentioning

confidence: 99%

“…Currently, among the displacement sensors available on the market, LVDT (Linear Variable Differential Transformer) and DVRT (Differential Variable Reluctance Transducer) are characterized by high accuracy, high speed and low cost. Many commercial measuring devices manage several LVDT and DVRT simultaneously and some solutions have been proposed to enhance both accuracy and sampling rate of such kind of systems [2,3,4].…”

Section: Introductionmentioning

confidence: 99%

IEEE 1588-based Synchronization System for a Displacement Sensor Network

Ferrari

Flammini

Marioli

et al. 2006

2006 IEEE Instrumentation and Measurement Technology Conference Proceedings

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This paper deals with a displacement sensor network that is built over Ethernet and synchronized according to IEEE1588. Actually, distribution of precise time reference in an Ethernet network allows implementations of distributed measurement systems, overcoming limitations of complex architecture. The application of the well known IEEE1588 lets sensors to share the same time reference and, in the case of displacement measures, enables accurate calculation of cross-derived quantities (multidimensional speed and acceleration). In this work a description of the sensor architecture is given and the attention is focused on the IEEE1588 implementation. In particular the proposed low-cost system does not use any dedicated synchronization hardware but it can reduce the deviation from time reference down to 20 µs.

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A novel DSP-based LVDT signal conditioner

Cited by 44 publications

References 3 publications

Displacement Measurement

Displacement Measurement

An Adaptive Analog Circuit for LVDT’s Nanometer Measurement Without Losing Sensitivity and Range

IEEE 1588-based Synchronization System for a Displacement Sensor Network

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A novel DSP-based LVDT signal conditioner

Cited by 44 publications

References 3 publications

Displacement Measurement

Displacement Measurement

An Adaptive Analog Circuit for LVDT&#x2019;s Nanometer Measurement Without Losing Sensitivity and Range

IEEE 1588-based Synchronization System for a Displacement Sensor Network

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An Adaptive Analog Circuit for LVDT’s Nanometer Measurement Without Losing Sensitivity and Range