脚步测试仪是一种颇受欢迎的日常锻炼进度监控器，可以激励人们挑战自己，增强体质，帮助瘦身。与传统的机械式传感器不同，ADXL345是电容式三轴传感器，由它捕获人体运动时加速度信号，更加准确。信号通过低通滤波器滤波，由单片机内置A／D转换器对信号进行采样、A／D转换。软件采用自适应算法实现计步功能，减少误计数，更加精确。单片机STC89C52控制液晶显示计步状态。整机工作电流只有1-1.5mA，实现超低功耗。(The foot tester is a popular daily exercise monitor that motivates people to challenge themselves, build up their fitness and help them lose weight. The function of the foot tester can be analyzed according to the human movement. The human movement can be analyzed by many characteristics. Unlike conventional mechanical sensors, the ADXL345 is a capacitive three axis sensor that captures the acceleration signals of human motion more accurately. The signal is filtered by low pass filter, and the A / D converter is used to sample the signal and convert the A / D. The software uses adaptive algorithm to implement step function, reducing the number of errors, and more accurate. SCM STC89C52 control LCD step state. The working current of the whole machine is only 1-1.5mA, and ultra low power consumption is realized.)