Based On STM32, The Remote Alarm System For Children's Accidental Locking In The Car

With the continuous development and progress of modern science and technology,The automobile industry has also got great development,and The car has become the first choice of most young people's daily travel.But while bringing convenience,there are also certain safety risks.In recent years,there are many cases of children locked in the car to death,which has become an urgent problem in the field of children's car safety.In this dissertation,by looking up the existing related products on the market and studying the published research results,we find that the existing products have some shortcomings,such as high price,easy to be disturbed and so on.In previous studies,the design of human body detection and in-vehicle feedback is insufficient.And through the actual experiment,summed up the causes of children's accidental locked in the car and the main factors of death.On the basis of these studies,we have developed our own design scheme,and determined the overall framework of the remote alarm system for children's accidental locked based on STM32.This dissertation introduces GPRS technology and Aliyun server into the system design.GPS positioning module,MPU6050 acceleration sensor and hall proximity switch are used to determine the driving state and door switch state of the vehicle.DS18B20 temperature sensor and SGP30 gas sensor are used to monitor the interior environment.The back seat human activity detection adopts the combination of microwave radar and vibration sensor to reduce the false alarm rate.When signs of human activity are detected,the system connects to Alibaba cloud server through GPRS module to send data.For the problem of insufficient feedback on the situation inside the car,the system connects an OV2640 camera to capture the rear seat,and the image is transferred to OSS,which is called through the API interface.When there is an emergency situation where a child locked in the vehicle by accident,the buzzer will warn the surrounding environment.Through Aliyun server,the system sends alarm information,snapshot photos of the rear seat of the vehicle and real-time environmental conditions in the car to the owner's application to give an alarm.When the door is opened or the owner turns off the alarm,the system will turn off.The overall system test shows that the introduction of GPRS technology and Alibaba cloud server into the system research improves the reliability of the system,makes up for the shortcomings of the existing research,and reduces the data transmission delay.