With the increasing popularity of cars, cars bring convenience to people, but also bring many problems. For example, in recent years, forgetting children in the car has happened everywhere from time to time, which leads to accidents. According to relevant data, in the nine months of 2017, at least 38 children in the United States died of heat stroke caused by the heat in the car. And since 1994, more than 800 children have died in similar accidents. In 55 per cent of these accidents, parents were unaware that their children were in the car.
Experts say that even if the temperature outside the car is in the twenties, the temperature inside a car parked in direct sunlight can quickly reach 50 degrees Celsius, and the temperature inside a child's body rises three to five times faster than that of an adult, so it only takes a few minutes for the heat to throw the child's ability to regulate his or her body temperature out of whack. Solve this problem without delay!
At present, one after another, car manufacturers have introduced rear passenger monitoring system (ROA system). The ROA system introduced by Hyundai uses ultrasonic sensors to monitor the rear seats to detect any movement of children. After the driver locks the car and leaves, the system detects a child's movement and sends out an alarm with a flashing light and the ability to send an alert message to the owner's smartphone via Hyundai's Blue Link system. A message on the dashboard also reminds the owner to check the rear seats before exiting the vehicle.
Monitoring with ultrasonic sensors is a proven solution for ROA systems. The product is mounted on the roof of the vehicle and detects moving objects by means of the ultrasonic ranging principle, sending an alert message to inform the vehicle owner when a moving object (person, pet) is detected in the back seat of the vehicle, with the advantages of stable performance and cost-effectiveness. If you want to know more about it, please visit Audiowell's booth at electronica China in Munich, where we will explain the new automotive technology to you.
Ultrasonic Sensor Principle: When the AC electrical signal is input to the sensor, the sensor will emit ultrasonic signals, which will propagate in the air, and when encountering obstacles, the signals will be reflected back and received by the sensor.
Ultrasonic sensor features:
- Can measure objects of different shapes and materials
- Not affected by ambient light
- Large measuring range
- In addition, ultrasonic sensors can also sense speed, using the Doppler effect of ultrasound to sense the movement speed of objects, which can be used for dynamic target detection, breathing detection, etc.
- Micro-motion sensing, overcoming the limitation of spatial resolution
- Tracking algorithm optimisation, motion model upgrade
- Target feature recognition and classification
- More accurate target trend judgement
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