Piezoelectric sensors are used in a large number of vector force testing applications

and the crystal box composed of quartz wafers is the core component of the piezoelectric sensor. The crystal box is composed of different cut quartz wafers and electrode sheets through a certain arrangement

so the piezoelectric performance of the quartz wafer is the basis of piezoelectric sensor research. The force-electric conversion performance of a crystal group consisting of quartz crystals containing seed crystals is the focus of research. Based on optical microscopy analysis

static test on crystal group composed of X0°and Y0° seed crystal. Output characteristics of different types of crystal groups are obtained. And matrix of positive piezoelectric effect of seed crystal is deduced on the basis of piezoelectric theory of crystal physics and elastic mechanics. The research provides a reference for the application of seed crystal wafers in piezoelectric sensors.