# Alarm about a child left in the car

Александр Юльевич Иоффе

It is not recommended to forget the child in the car. If the child is not prepared mentally, he may feel bad from crying. The child's clothes should be warm. Fresh air in the cabin, etc. In addition, even in warm countries, it is cold at night, especially in winter. Our invention is more perfect than others, and it will work in a country with any climate, both winter and summer, night and day, to protect the child from overheating, from hypothermia and from thieves. An alarm will be sent.

The device equipped with a mobile phone and is equipped with sensors and an information processing tool, has a delay button for sending a signal and timers with the possibility of settings. It must be electrically coordinated with the anti-theft security device and sensors.

The logical principles that underlie the operation of the device.

1- After turning off the engine, after a given short time, neither parents nor children should be in the car. Otherwise, an alarm signal will be sent. The car is used to move from point A to point B, not to live in it. And so it is 99 percent of the time.

2-If the parents, however, want to stay in the car for a while, then let them press the button to delay sending an alarm signal for a given time. The same if they want to leave the child for a while.


Operation of the device.

The device turns on after the car engine is turned off or the temperature in the cabin is exorbitant and periodically checks the presence of people in the car every few minutes. If after the time set in the device settings (timer), say, if after 2 minutes, a child or other people (say thieves) will still be in the car, an alert about this will occur in various forms. Calls will be made to parents or other people whose phone numbers will be recorded in the memory of the mobile phone installed in the device, and a prerecorded message will sound. After the period of time required for the return of parents or guardians and the rescue of the child, if the child is found in the car again, the car alarm will be turned on, the horn and flashing lights will be activated to attract the attention of parents who have left nearby (maybe their phones are turned off and they have not received a call from the device), passers-by or traffic police. If the child is in the car after the engine is turned off with his parents or alone, but with their knowledge, you can delay the alarm by using a special button for the time set in the settings, say 10 minutes. When all the people leave the car (another check will show this), the device will turn off. When the engine is turned on, the device does not check for the presence of people in the cabin, the exception is the extreme temperature. For example, a child was forgotten with the engine turned on, and from sun or from frost, the temperature in the cabin became life-threatening.


Sensors.

Information about the engine running or turned off can come in several ways. One is from a sensor that senses the vibration of the machine, which occurs when the engine is running. The second is from the operation of the alternator, which, as it known, mechanically connected to the motor, and generates electricity during its operation. You can use the battery charging sensor, which is in every car and is directly related to the operation of the alternator. In addition, you can get information that the motor is turned off by cooling it down, you need to put a temperature sensor with a threshold value near the motor. In addition, there must be a temperature sensor in the cabin, which will warn of life-threatening values and also include a check of the location of people.

Information about the presence of a child or other people in the car will come not from one, but from several sensors (for reliability). You can select several sensors from the options presented below, the list of which can probably be continued. When at least one of the sensors installed on the machine is triggered, an alert will occur.

1. Capacitive, common for car anti-theft alarm.

2. From the movement of air in the car.

3. Chemical. It will analyze the dynamics of changes in the content of oxygen and carbon dioxide in the air in the cabin (from the child's breathing).

4. Voice. A special program will process audio signals in the car interior and isolate the crying and voice of the child from them.

5. Thermal imaging scanning system* and/or local thermal sensors**.

6. Pressure sensors that respond to the weight of the child, which can be equipped with a special child's chair and car seats.

* Thermal imaging system with automatic image recognition. It is better to put two such thermal images in the front and rear of the cabin, so that the seat backs do not interfere with the view.

** As they are described in the US invention owned by Pelar Thompson US 8618926 B1.


Note. All these sensors and a mobile phone, when the proposed device "falls asleep", can be used by another anti-theft device. Actually, the difference between the proposed device and the anti-theft alarm device with a call to the owner's mobile phone is that the anti-theft alarm is activated from the button on the key chain, and this is from turning off the engine after a given short time or an exorbitant temperature, plus with the possibility of delaying the activation of a special button. And it seems reasonable to combine these two devices in one.


The Addition Is A Luxury Option.

This version of the device is more expensive, but also more perfect.

Its difference is that the parents or guardians of the child are given the opportunity, after receiving a warning call, by answering the mobile phone of the device, to deactivate it for a given time (here we will need another timer) and come and rescue the child without noise to the whole street. Such a possibility of deactivating calls will be given to them a given maximum number of times, say 3. If the device, after the end of the deactivation time, still finds a child in the car, then the noise and light alarms will already turn on and even a call will be made to the police indicating the location of the car, which will be read from the built-in GPS (which will slightly increase the cost to us) ***.

*** The idea of reading coordinates from GPS for such a device is contained in the aforementioned patent of Pelar Thompson and should be purchased from her.


AN ADDITIONAL INEXPENSIVE BUT EFFECTIVE OPTION.

When the engine is turned off, the sound reproducing device will turn on and remind you: 'Don't forget the child in the car!'