关键词：传感器；运动；测量系统；无线射频技术
摘 要：Originated from the need in the training of sports universities,a new personal motion-measurement system via piezoelectric sensor is presented to detect step number,stride frequency,and energy consumption in motion.The motion-measurement system in training should be not only accurate in detection,but also convenient for athletes.The novel system consists of detection unit,RF-wireless unit,and display unit.Using a high-sensitive piezoelectric sensor placed within the ball or lateral side of a personal shoe,the accuracy is improved greatly.With RF-wireless,the system achieves the goal in convenience.In the display unit,detected step number,stride frequency,and energy consumption are used to evaluate the quantity of motion,so the athletics can adjust their gait immediately.Compared with existing systems,the personal motion-measurement system via piezoelectric sensor improves greatly in accuracy and convenience.