Patent ID: 8222585
Filing Date: 2012-07-17
Classification: G01D

Abstract:
1. A method for using a three-dimensional position detecting device, comprising: (a) providing an electromagnetic radiation source for generating electromagnetic radiations, a first sensing module having a plurality of first sensing elements, and at least one second sensing module having a plurality of second sensing elements, wherein the electromagnetic radiation source is a point source; (b) using the first sensing elements and the second sensing elements for receiving different radiation energies generated by the electromagnetic radiations from the electromagnetic radiation source from different spatial angles; (c) obtaining the values of two spatial direction angles of the electromagnetic radiation source relative to the first sensing module and the second sensing module according to the magnitude relationship of the radiation energies received by the first sensing module and the second sensing module; and (d) obtaining a spatial coordinate position of the electromagnetic radiation source relative to the first sensing module and the second sensing module according to the matrix operation of two spatial distances from the electromagnetic radiation source to the first sensing module and the second sensing module and the two spatial direction angles of the electromagnetic radiation source relative to the first sensing module and the second sensing module; wherein the step of (b) to the step of (d) further comprises: building a first projection transformation matrix by the first sensing module relative to the electromagnetic radiation source, wherein the normal vector of the first sensing element is parallel to a reference axis of a spatial coordinate, and the normal vectors of the other first sensing elements each are relative to the reference axis in order to generate corresponding included angles; building a second projection transformation matrix by the second sensing module relative to the electromagnetic radiation source, wherein the normal vector of the second sensing element is parallel to a reference axis of a spatial coordinate, and the normal vectors of the other second sensing elements each are relative to the reference axis in order to generate corresponding included angles; selecting the radiation energies that are received by one part of the first sensing elements and are higher than the radiation energies received by the other first sensing elements; selecting the radiation energies that are received by one part of the second sensing elements and are higher than the radiation energies received by the other second sensing elements; obtaining the value of a first spatial direction angle of the electromagnetic radiation source relative to the first sensing module according to the matrix operation of the radiation energies received by the one part of the first sensing elements and the first projection transformation matrix built by the first sensing module relative to the electromagnetic radiation source; obtaining the value of a second spatial direction angle of the electromagnetic radiation source relative to the second sensing module according to the matrix operation of the radiation energies received by the one part of the second sensing elements and the second projection transformation matrix built by the second sensing module relative to the electromagnetic radiation source; figuring out a first spatial distance from the electromagnetic radiation source to the first sensing module; figuring out a second spatial distance from the electromagnetic radiation source to the second sensing module; and obtaining the spatial coordinate position of the electromagnetic radiation source relative to the first sensing module and the second sensing module according to the matrix operation of the two spatial distances and the two spatial direction angles.