用三块超声波模块组成一个等边三角形,以三角形的中心为坐标源点,可以测出空间中任意一点到坐标源点的距离及其在空间中的坐标,并通过12864LCD显示出来.-3 ultrasonic module with the formation of a equilateral triangle to the center of the triangle for the coordinates of the source point, can be measured in any point of space