Abstract: The paper developed a controlling system on the integrated child safety seats platform which was already built, taken the “child restraint systems safe height” as the protection mechanism and based on the Android platform and MC9S12SX128MAA microcontroller. The controlling system send data to the microcontroller via bluetooth based on Android platform and the data includes the height of child and the controlling commands, the MCU will automatically adjust the height of the seats according to the instructions. The system has developed a complete set of hardware circuit and controlling programs and has made the hardware ring test with the phone clients, through which the signal reception accuracy was 100% and the maximum error between the theory and the practical height of the seat is 3.5%.

Key words: integrated child safety seat, bluetooth, intelligent control system