【摘要】 基于位置信息的应用越来越广泛,对精度的要求也越来越高,为此设计了一种基于超声波测距的高精度室内位置感知系统。首先对超声波测距原理及误差来源进行系统分析,并建立误差修正模型,采用多项式拟合法确定模型参数后对测距误差进行修正;其次,通过最小二乘定位算法解算得到目标位置并在上位机上实时显示,最后对位置感知系统的定位结果和定位精度进行对比分析。结果表明:经过误差修正模型补偿后的定位精度有了明显提高,改进的定位精度在30 mm内的达到95%、最大误差为59 mm、平均误差在18 mm左右、满足设计要求。该位置感知系统结构简单、易于实现且精度较高,具有一定的应用意义。更多还原

【Abstract】 The application of location information is more widely,and the demand for precision is also increasing. Therefore,a high precision indoor position sensing system was designed based on ultrasonic distance measurement. Firstly,the principle of ultrasonic distance measurement and the source of error were systematically analyzed,and the error correction model was established. After the model parameters were determined by polynomial fitting method,the distance error was corrected. Secondly,the target location was obtained by the least square localization algorithm and was real-time displayed on the host computer,and finally the position-sensing system positioning results and positioning accuracy of comparative were analyzed. The results show that the accuracy of the positioning accuracy is improved by 95%,the maximum error is 59 mm,and the average error is about18 mm,which satisfies the design requirements. The location sensing system is simple,easy to implement and has high precision,so it has certain application significance.更多还原