Bluetooth and WiFi are generally triangulation, similar to satellite positioning in the sky. Four Bluetooth base stations can locate a point in three-dimensional space.
Bluetooth indoor positioning
The network-side positioning scheme adopts a positioning system based on Bluetooth gateway (TD05/TD05A/TD05B/VDB2603) and Bluetooth bracelet, which can monitor the indoor personnel's position information in real time, and can upload data such as heart rate, body temperature, steps, etc. from real-time remote control Bluetooth bracelet. The positioning accuracy is 2 ~ 3m, and it is widely used in schools, nursing homes, hospitals, prisons and other places.
Network side positioning scheme based on Bluetooth gateway
Positioning principle: Bluetooth gateways are connected with the positioning server by wired (Ethernet) or wireless (WiFi) mode, and each Bluetooth gateway is powered by power adapter (5V) or POE mode. The Bluetooth gateway will directly upload the scanning receipt of the tamper-proof Bluetooth bracelet to the positioning server through the existing wired network or wireless WiFi network coverage, so as to realize the positioning on the Bluetooth network side.
The whole system can monitor real-time position, historical trajectory, real-time heart rate, real-time body temperature, real-time steps and personnel distribution density.
Ultra-wideband indoor location map
Ultra-wideband indoor positioning principle;
The positioning principle of UWB is to arrange four positioning base stations with known coordinates indoors, and the positioned person or equipment carries UWB positioning tags. The UWB tag emits pulses at a certain frequency, continuously ranging with four base stations with known positions, and accurately calculates the position of the UWB positioning tag through a certain algorithm.
Ultra-wideband positioning principle
Demonstration kit of ultra-wideband positioning minimalist system
The main application scenarios of UWB positioning are: electronic fence, follow me, robot positioning, factory personnel/materials positioning, prison inmates positioning, nursing home elderly positioning, tunnel/pipe gallery construction personnel positioning, power station positioning and other applications that require centimeter-level high-precision indoor positioning information.
Overall architecture of UWB ultra-wideband indoor positioning;
UWB positioning system consists of UWB base station, UWB tag, UWB positioning engine and terminal display.