Analysis of the Positioning Principle of Children's Watches

 Kids smart watches usually use GPS, WiFi and LBS technologies for positioning, through which relatively accurate location information can be obtained. 

The following is a detailed introduction and working principle of these three positioning methods:

GPS Positioning: GPS (Global Positioning System) uses satellite signals to determine the location of your device. Children's watches have built-in GPS chips and antennas that receive signals from satellites to calculate the longitude and latitude of the device. GPS positioning requires the device to be in an open area with a good view of the sky to obtain satellite signals, thereby providing higher positioning accuracy. 

WiFi positioning: WiFi positioning uses WiFi signals near the device to determine its location. The children's watch scans for nearby WiFi signals, obtains the signal's strength and identity, and then approximates the device's location by matching it to a database of known WiFi base station locations. This technology is suitable for indoor environments and urban areas, and its positioning accuracy is relatively high. 

LBS positioning: LBS (base station positioning system) uses mobile communication base stations to determine location. The children's watch will communicate with nearby mobile communication base stations and obtain the strength and identification of the base station signals. The device's location is then approximated by matching against a database of known base station locations. LBS technology works better in urban areas and areas with dense base stations, but its positioning accuracy is lower than GPS and WiFi positioning. 

Children's watches often use all three positioning technologies together to provide more accurate location information. The device will automatically select the best positioning method based on available signal sources and environmental conditions to provide the most accurate positioning results.