Research on the experiment system for the inductive displacement sensor in the optical synthesis telescope

摘要

The optical synthesis telescope is based on the optical synthesis imaging technology which joins small diameter sub-mirrors to form a large diameter telescope by segmented mirrors and position optimization. It can satisfy the high resolution observation. However, the detection technology of displacement between syntheses plays a crucial role in optical synthesis telescope. The principle of inductive displacement transducer is used to acquire the tangential displacement between two sub-mirrors in the paper. Inductive sensor is one kind of small, light plane inductor pair which is easy to install between two sub-mirrors. The paper introduces a sinusoidal wave excitation signal generating circuit for the inductive sensor, and selects the best excitation frequency to optimize the sensor performance. The results of the experiment indicate that our method is accurate by designing and testing the sensor, which provides a key technology for the development large telescope in the world.