摘要
提出一种基于STM8S单片机控制的超声波测距系统的设计方案．在分析超声波测距产生盲区和误差原因的基础上，设计时间增益补偿电路和峰值时间检测电路，并使用电容触摸按键代替机电开关，确保正确捕捉回波的到达时间，提高测距精度．试验验证表明：该系统在2．5～10m范围内测距误差不超过0．25％．
A design of ultrasonic ranging measurement system based on STMSS microcontroller is presented. The time- gain compensation （TGC） circuit and the peak time detecting circuit are designed on the basis of the blind area and error analysis. In addition, capacitive touch button is used to replace mechanical and electrical switch. The arrival time of ultra- sonic echo can be correctly detected. And the ranging accuracy is increased. Experiments show that ranging error of the system is below 0. 25% between 2.5-10 m,
出处
《华侨大学学报（自然科学版）》
CAS
北大核心
2013年第5期489-493,共5页
Journal of Huaqiao University(Natural Science)
基金
福建省自然科学基金资助项目(2011J01350)
中央高校基本科研业务费专项资金资助项目
华侨大学科研基金资助项目(JB-ZR1107)
