摘要
设计了多传感器测距系统的硬件电路和相应的软件,采用高速运放和高速比较器减小信号传输延时,用双比较器整形电路消除回波前沿时间误差,利用FPGA进行高速计时,对声速进行温度补偿,并对其盲区采用红外线测距传感器和碰撞开关进行弥补,提高超声波测距精度。实验表明,在近距离测量范围内,该超声波测距方法可以达到毫米级。这种测量系统可以满足机器人避障与定位的实际需要。
The hardware circuit and corresponding software of multi-sensor ranging system were designed. High speed amplifiers and comparators were used to reduce signal delay time, dou-comparator reshaping circuit was used to eliminate the front time error of echo, and FPGA was used as high speed counter. All these were to improve the ultrasonic ranging precision. Infrared ranging sensor and collision-switch were made up for the blind-spot of ultrasonic sensor. In the near distance measurement scope, experiments indicate that the precision of ultrasonic ranging method is millimeter. The multi-sensor ranging system can satisfy the needs of avoiding obstacles and location.
出处
《计算机应用》
CSCD
北大核心
2008年第B06期340-343,共4页
journal of Computer Applications
基金
国家自然科学基金资助项目(60674070)
