In view of the extensive applications of electronic gears in sports contests and the development of Taekwondo electronic gears

fiber-optic sensor-based Sanda electronic protective gear is proposed.On the basis of the principle and characteristics of the existing fiber-optic microbend sensors

an appropriate microbend modulator and sending/receiving system of this gear is designed.Fibers are bended to different degrees under the action of certain external impact force

thus different voltage values obtained

which are used to judge the sizes of the impact force.The experimental test results show that in a certain range

the impact force is approximately linear with the voltage values

realizing the automatic evaluation and scoring for Sanda competitions.