Abstract
LVDT displacement transducer is a main mean to measure the linear displacement,it has been widely used in the industrial, especially in the field of automatic control. This article start from the LVDT displacement transducer principle, by using QuickField in finite element modeling and simulation, getting the relationship between resistance and detection range of LVDT displacement sensor .Then to get output voltage by changing the displacement. The simulation results show that basing on the finite element method of QuickField have important guiding significance to LVDT displacement sensor. The influence of changing parameters to LVDT displacement sensor on performance is more significant, so the key to design LVDT displacement transducer is to optimize the parameters of the sensor. The simulating results indicated that short length of winding, large width of winding and small distance between winding and reflector can bring better sensitivity. The results will provide useful method for the optimization of LVDT displacement sensor. The results of studying provides the optimal sensor a favorable method and means.
The thesis is divided into four chapters, each chapter are summarized as follows:
Chapter I. LVDT displacement sensor characteristics of the nonlinear, it’s a key to understand the mechanism will improve the LVDT linear displacement sensor performance.
Chapter II.The design of LVDT displacement sensor components. As the magnetic field exists inhomogeneity, there are great difficulties and obstacles to give an accurate mathematical models.
Chapter III.Using finite element technology to establish a differential transformer with spiral coil characterized by three sections, simulate the final synthesis parameters of sensor coil mutual inductance variation with armature displacement to reveal the nonlinear mechanism.at last,get the results of simulation.
Chapter IV.A theoretical basis for the further of this sensor will provide a favorable method and means.
Key words: LVDT displacement transducer Finite element analysis QuickField
