ULTRA-PRECISION CUTTING QUASI-STATIC FORCE MEASUREMENT SYSTEM BASED ON PIEZOELECTRIC CERAMIC SENSOR

摘要

The present invention relates to the field of ultra-precision cutting technology, specifically to a ultra-precision cutting quasi-static force measurement system based on piezoelectric ceramic sensor. This system includes a piezoelectric ceramic force sensing unit that responds to the force applied by a single-point diamond tool and generates an electric charge signal sent to an external post-processing module. The post-processing module includes a preamplifier circuit for the charge, a low-pass filter circuit, an ADC (Analog-to-Digital Converter) module, a DSP (Digital Signal Processor) and a computer. The computer calculates the actual force Fi applied to the piezoelectric ceramic force sensor at moment i based on the solution of the dynamically changing force fi at each moment and the accumulation of the dynamically changing forces from previous moment.