Spatial coordinate positioning system
AssigneeKorea Institute of Industrial Technology
InventorHo-Jae Lee
Life of this patent
Estimating the term…
Abstract
The present invention relates to a spatial coordinate positioning system, particularly to a spatial coordinate positioning system which is capable of measuring a position of spatial positioning target in high-precision by calculating spatial coordinates of assistant point stations at a predetermined interval on the basis of a coordinate of a ground base point station and distance information between the assistant point stations in a space where the plurality of assistant point stations are installed of which coordinates were unknown.
Claims11
A spatial coordinate positioning system comprising:
- at least one ground base point station of which position information was already determined and which has a laser distance measurement function and a wireless distance measurement function;
- a plurality of assistant point stations which have a wireless distance measurement function;
- and
- an assistant point position calculation server which receives laser distance information between each of the as least one ground base point station and a specific assistant point station of the plurality of assistant point stations, first wireless distance information between each of the at least one ground base point station and each of the plurality of assistant point stations except for the specific assistant point station, and second wireless distance information between the plurality of assistant point stations at a predetermined time, and calculates position information of the plurality of assistant point stations at a predetermined time, on the basis of the laser distance information, the first wireless distance information, the second wireless distance information, and the position information of the at least one ground base point station.
A spatial coordinate positioning system comprising:
- at least one ground base point station of which position information was already determined and which has a laser distance measurement function and a wireless distance measurement function;
- and
- a plurality of assistant point stations which have a wireless distance measurement function, wherein
- the at least one ground base point station receives wireless distance information between the plurality of assistant point stations at a predetermined time and calculates position information of the plurality of assistant point stations at a predetermined time on the basis of laser distance information between a specific assistant point station of the plurality of assistant point stations and each of the at least one ground base point station, the wireless distance information, and the position information of the at least one ground base point station.
A ground base point station comprising:
- a laser module which includes a light source emitting laser and a light receiving portion detecting reflected laser,
- a distance measurement portion which calculates laser distance information with an assistant point station on the basis of time information related to emission and detection of laser;
- a wireless communication portion which transmits and receives a radio signal to and from the assistant point station and transmits wireless distance information to an assistant point position calculation server, and
- a control portion which controls the laser module, allowing transmitting laser distance information calculated from the distance measurement portion through the wireless communication portion.
A method for calculating spatial coordinates of a plurality of assistant point stations by an assistant point position calculation device in a spatial coordinate positioning system composed of at least one ground base point station of which spatial coordinate was known and the plurality of assistant point stations of which spatial coordinates were not known, comprising steps of:
- receiving laser distance information between each of the at least one ground base point station and a specific assistant point station of the plurality of assistant point stations;
- receiving wireless distance information between the plurality of assistant point stations;
- generating a system of equations for each of the distance information (Lij) with respect to the laser distance information and the multiple wireless distance information,
- Lij=Lji=√{square root over ((Xi−Xj)2+(Yi−Yj)2+(Zi−Zj)2)}
- wherein i, j=1, 2, . . . , M+N, M is the number of the at least one ground base point station and N is the number of the plurality of assistance point stations;
- and
- calculating spatial coordinates (Xn, Yn, Zn) of the plurality of assistant point stations from the system of equations.
Dependencies are inferred from the claim text.