Abstract: In order to improve the positioning precision of the target, an optimal disposition method for multiple sensors intersection system for large scale precision measurement is researched. Taking electronic theodolites as an example, a mathematical optimal disposition model for multiple sensors based on error separation is presented firstly, then the spatial constraints of the sensor disposition are analyzed with geometric approximation algorithm, the question of non-linear programming with inequality constraint conditions is solved by Guo algorithm and the best disposition of the sensors in permitted space is attained at last. The result indicates that the precision of the measurement is improved evidently and it can be use to provide guidance for disposition of multiple sensors in industrial field.

Key words: Large scale measurement, Optimal disposition, Error separation, Spatial constraints, Guo algorithm