基于MMA8452Q传感器的计步器抗干扰设计  

An anti-interference design for pedometer based on MMA8452Q sensor

作　　者：李萍[1] 陈鹏宇[1] 李泽仁[1] 

机构地区：[1]大连交通大学动车运用与维护工程学院,辽宁大连116028

出　　处：《电子设计工程》2014年第7期161-164,共4页Electronic Design Engineering

摘　　要：介绍了基于MMA8452Q加速度传感器的计步器设计。MMA8452Q是一款具有12位分辨率的智能低功耗、三轴、电容式微机械加速度传感器。本设计充分利用了该传感器对被检测模拟信号的滤波处理能力,并配合软件抗干扰措施,通过检测人行走时腰部产生的垂直加速度的变化,实现间接检测步数的目的。设计硬件简单,计步精度较高,稳定性好,已经通过实际调试,具有实用价值。This paper introduces a design of pedometer based on MMA8452Q. MMA8452Q is a smart low-power, three- axis, capacitive micro-machined aecelerometer with 12 bits of resolution. The design takes full advantage of the filter inside MMA8452Q for analog signal, and besides, uses anti-interference methods in software ways. The pedometer depends on detecting the changes of vertical acceleration on waist in walking process which indirectly reflect the step numbers to be measured. Though hardware design is much simple, the accuracy of counting is pretty high with good stability. This design has been passed practical tests, so it can be put into practice.

关 键 词：计步器 单片机 抗干扰 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置]