Ultrasonic wave positioning system has been used in various areas

especially some situation out of human’s reach or control

such as robot positioning

reverse positioning

positioning of machine tool parts.In order to solve problem of conventional ultrasonic wave positioning method has poor precision and limited range

a new positioning method based on double urtrasonic wave module is proposed.The method uses AT89S52 as control chip of whole system

and through improving conventional ultrasonic wave positioning process

and optimizing positioning algorithm

the third path is found to verify that two paths measured by around ultrasonic wave module forms a triangle and to achieve accurate positioning.