Drone 3D centimeter positioning scheme
Real-time indoor positioning is one of the key technologies for indoor applications of drones . The indoor environment is limited, and the position of the drone changes very fast. It requires the accuracy above the decimeter level to meet the requirements of real-time navigation control.
PLUS has developed an ultra-wideband real-time three-dimensional positioning system with positioning accuracy of up to 2cm-10cm with its world-leading technology advantages. It has been highly recognized by the market with a response speed of 0.01 seconds, a small coin-sized volume and stable working performance in a complex environment.
First, three-dimensional positioning software introduction
The PLUS 3D positioning software adopts the 4-point positioning principle, which adds a height reference point to the 3-point positioning of the two-dimensional positioning to obtain accurate X, Y, and Z coordinate information.
Below is our 3D software interface:
As shown in the figure, the eight blue dots are the location of the PLUS positioning reader, one red dot is a flying drone, and the red dot is the real-time three-dimensional coordinate information of the drone.
PLUS three-dimensional positioning system has significant advantages and features such as high precision, high refresh rate and high stability in the field of UAV positioning , and can directly output GPS format coordinates, so that the UAV positioning can be seamlessly connected indoors and outdoors, and also Drawing 3D map directly in PLUS 3D positioning software is a powerful assistant in the development and application of drones.
First, the PLUS system introduction
1, system composition
The PLUS Ultra Wideband (UWB) Instant Positioning System consists of a tag, reader, antenna, sync splitter, and positioning software.
1, working principle
The tag transmits 1 to 100 UWB signals per second. The antenna receives the signal from the tag and is parsed by the reader. The reader and antenna group are connected to the server via a network cable (Super Category 5 anti-shielded cable) and a synchronous distributor. The data of each reader is synchronously processed by the synchronous distributor and transmitted to the server computer for calculation, and the label position and the motion track can be obtained. Each tag has a unique ID number, so the system knows where each tag is at each moment and motion information. The center frequency is 6G~7G, and the bandwidth is 1~2G. It is the top high-end positioning system in China.
1, system characteristics
The system's positioning accuracy is 2-10 cm, supporting multiple modes, including 0-dimensional (coarse mode), 1D (pipeline/corridor configuration), 2D (precise plane positioning), 2.5 dimensions (precise plane positioning plus floor area) Information) and 3D (accurate 3D spatial positioning), which can track 8000 tags at the same time, using the Time Difference Alignment Method (TDOA) positioning and tracking, can dynamically change the tag working state and refresh frequency. The system is certified by the FCC (Federal Communications Commission) and ETL (American Electronic Testing Laboratory, Edison).
Compared with the wireless local area network Wi-Fi positioning system, UWB system has the characteristics of high precision, stable signal, no anti-interference ability, good real-time performance, etc. Compared with other ultra-wideband positioning systems, PLUS system has price concessions and convenient deployment. When expanding, there is no need to re-verify the existing system, and it is resistant to low temperatures, and the number of labels that can be tracked at the same time has outstanding advantages.
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