An apparatus measuring and determining the small length automatically

An apparatus which can measure and determine the small length automatically,is introduced.It consists of the microcontroller units,FPGA,DDS sine wave generator,differential transformer wire,gears,voltage measurement circuit,motor driving circuit,etc..It used the magnetic-electric transformation and the principle of the differential transformer.Combining with the newly developed embedding control technology,it's pointed to the automatic measurement and determination,accurate error≤0.05 mm.The apparatus is simple,easy to use and has the flexibility to adapt to the new usage.