摘要
提出一种基于超声传感器的低成本三维测量方法。该方法采用一个超声波发射端和多个超声波接收端的组合,通过超声测距原理获得发射端到多个接收端的距离,从而计算超声波接收端的空间三维位置;在超声波三维测量方法的基础上,推导了基于最小二乘法的三维位置反演算法,搭建了基于FPGA的测量硬件系统并进行了实验研究。实验结果表明:坐标估计的绝对误差小于20 mm,重复性较好,测量精度有进一步提高的空间。
A low-cost three-dimensional coordinate measuring method based on ultrasonic sensors is proposed.One ultrasonic wave transmitting terminal and multiple ultrasonic wave receiving terminal are used in this method.The distances between transmitting and receiving terminal are calculated by the principle of ultrasonic ranging,then spatial three-dimensional coordinates of receiving terminal are calculated.On the basis of ultrasonic wave three-dimensional measurement method,three-dimensional position inversion algorithm based on least-square method is derived and measuring system based on FPGA is set up and experimental research is carried out.The experimental results indicate that the absolute error of coordinate estimation is less than 20 mm with good repeatability and measuring precision can be improved further.
出处
《传感器与微系统》
CSCD
北大核心
2013年第6期123-125,共3页
Transducer and Microsystem Technologies
