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This paper presents a prototype of Linear Variable Differential Transformer, which has been designed, simulated and produced in order to observe, study and characterize the effects on its working of an external interfering magnetic field. The LVDT prototype has been first simulated, both in standard conditions and in case of external interference, by using the FEM software FLUX. The design guidelines...
This paper proposes a rigorous and repeatable measurement procedure to analyze the effects of magnetic interferences on Linear Variable Differential Transformer sensors. This issue is neither addressed in the sensor datasheet, nor in the scientific literature. The potential of the method and the performance of an automated test bench, that implements the procedure, are proved by measuring the drift...
The sensitivity of linear variable differential transformer (LVDT) position sensors to external slowly varying magnetic fields represents a critical issue when these sensors are installed close to high-current cables or electrical motors with significant fringe fields. The resulting position error can reach several hundreds of micrometers against a specified uncertainty normally below a few micrometers...
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