The biggest hot topic in the technology industry in 2019 was 5G, and many intelligent wearables have also attracted everyone's attention. Taking the positioning bracelet as an example, it does not actually rely on 5G technology, but in recent years, the powerful positioning function has led to an increasing demand in many scenarios. So, what is the principle of positioning the bracelet? Why can positioning bracelets continue to gain market recognition?
The principle of locating a bracelet is not actually complex. Simply put, it is achieved through a Bluetooth gateway (also known as a base station) to locate the position. The bracelet is connected to the gateway and has a signal strength value RSSI, which is used to calculate the distance from the gateway and achieve position positioning. This is ambiguous positioning, only knowing that for example, it is 5 meters away from the gateway, but it can be any angle 5 meters away from the gateway. If precise positioning is to be achieved, it is necessary to have three gateways covering the bracelet. By using three RSSI values, namely the principle of three-point positioning, the specific position of the bracelet at which point can be calculated.