Alarm system for children detained in car

The invention provides an alarm system for children detained in a vehicle. The alarm system comprises a main control unit module, a TFT color screen module, a pyroelectric module, a motor module, an openmv machine vision module, a temperature and humidity sensor, an air quality sensor, a GPS module, a GSM module, a buzzer module and a highlight diode module. Whether a dynamic target exists in the vehicle or not can be monitored in real time while power consumption is low, and it is guaranteed that the system can work for a long time without affecting vehicle starting; pyroelectricity and an openmv machine vision module are matched to determine whether a child is left in the vehicle or not, and the false alarm rate is reduced; when it is determined that the child stays in the car and the temperature exceeds an early warning value, the car window can automatically descend by a certain height, the temperature in the car is reduced, and air circulation is improved; a danger alarm lamp and a display screen are tur