Measurement of micromovements with the help of a nonlinear sinusoidal oscillator and an inductive sensor
- Laboratoire LURSA, Institut Universitaire de Technologie d'Alencon, Centre Universitaire de Montfoulon, F61250 Damigny (France)
Proximity magnetic sensors are based on an induction coil that creates a magnetic field. The presence of a metal target in the vicinity of this coil modifies the properties of the field created by the coil and consequently the value of its equivalent R/L circuit. The sensor is usually used as a coil to fix the frequency value of a sinusoidal oscillator. The types of oscillators used (and the suggested linear analysis) do not make it possible to determine the oscillation amplitude value. So, designers of such sensors have to connect the distance target/sensor only to the variation of the oscillation frequency value. We propose the development of a nonlinear oscillator that allows linking oscillation amplitude and parallel resistance of the sensor. One can thus connect the distance target/sensor to the amplitude and/or the frequency of the oscillation.
- OSTI ID:
- 20644135
- Journal Information:
- Review of Scientific Instruments, Vol. 76, Issue 3; Other Information: DOI: 10.1063/1.1857631; (c) 2005 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0034-6748
- Country of Publication:
- United States
- Language:
- English
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