Indoor laser positioning system based on frequency labeling method

Abstract

The invention discloses an indoor laser positioning system based on a frequency labeling method. A frequency label algorithm module is used for completing demodulation conducted on modulated lasers emitted by a positioning light source and determining the position of a positioning terminal according to the correspondence between the laser frequency and the position coordinates of the area to be positioned. The positioning light source modulates and emits a laser bundle array so that laser light spots with different frequency labels can be formed in positions to be positioned to be detected and processed through a positioning terminal. The positioning terminal receives the lasers which are emitted by the positioning light source and have different frequencies, captures frequency information of the lasers after filtering, photovoltaic conversion and A / D conversion are conducted, and achieves positioning through the frequency label algorithm. Due to the fact that the lasers serve as carrier waves of signals, reliable and stable positioning service can be easily provided; due to the adoption of the frequency labeling method, the position is determined according to the frequency of laser modulation light received by the positioning terminal; the positioning accuracy of the light spots generated by the positioning light source reaches the centimeter level; hardware implementation and conversion are easily achieved so that the product can be popularized and used.

Description

technical field [0001] The invention belongs to the technical field of navigation, in particular to the indoor positioning technology of the frequency tag method, which is used for indoor laser positioning based on the frequency tag method. Background technique [0002] Compared with the vigorous development and wide application of outdoor navigation and positioning, the development of indoor navigation and positioning technology is relatively slow. As people's requirements for navigation services are getting higher and higher, researchers have conducted some research and attempts on indoor navigation and positioning, and proposed some indoor positioning technologies. Commonly used indoor positioning technologies include ultrasonic-based indoor positioning technology, infrared-based indoor positioning technology, ultra-broadband-based indoor positioning technology, and radio frequency identification positioning technology. For example, some engineers in Finland proposed Ind...

AI Technical Summary

Problems solved by technology

[0007] The indoor positioning methods involved in the above research are all inseparable from the support of the network. The strength of the network signal directly affects the positioning results, and even the system cannot work smoothly in places with poor network signals.

In addition, they require an extremely cumbersome and complicated information collection process and information search and matching process, a huge database needs to be established, and the real-time performance of positioning needs to be improved.

Images