Aiming at some problems of algometer

such as low precision and sensitivity

a kind of algometer based on high precision pull or press force sensor is developed.This instrument uses single-chip microcomputer C8051F020 as core

and by signal acquisition and processing circuit coordinated with software programming

collection

display and data storage of pressure pain threshold（PPT）are realized.Test results show that the obtained PPT has higher accuracy（<0.3N）and better stability

which provides reliable technical support for treatment and curative effect evaluation.