Children's Anti-Lost Alarm Based on Single Chip Computer

The working principle of the child alarm is STC89C52 single chip microcomputer as the control core, NRF wireless module as the transmission of positioning information data, based on the global satellite positioning system (GPS), through GPS signals to track the location of the child. System through the single-chip microcomputer minimum system, GPS positioning module, GSM module, NRF wireless communication module, alarm module to achieve the positioning of children's alarm, communication and alarm functions. The GPS module can detect the loss in time, so that the location information of the lost child can be found in time. The wireless communication module enables the signal transmission between the mother and the child. The GPS positioning signal is transmitted to the GSM module, and the SIM card is installed to receive the positioning information to the mobile phone SMS. Alarm is one of the core functions of the alarm, it is necessary to test its sensitivity to trigger the alarm and the error rate of the alarm test timing function. Including sound alarm test and LED warning light test two aspects, the alarm module designed by the buzzer as the main component.