DE10310419A1 - Use of mobile telephones as alarm systems for use in motor vehicles, by notifying driver or owner in event of theft or break-in - Google Patents

Abstract

The driver or owner himself is notified in the event of a theft or break-in to the vehicle. An electronic kit having similar functions to a mobile telephone, but with alarm functionality is retro-fitted.

Description

The invention relates to an alarm system for motor vehicles the above the functions of a cell phone works.

Mobile phones have the function in which any telephone number can be stored and it is activated at the push of a button. this function is also called redial of the last number dialed.

Becomes a cellphone accordingly connected in a motor vehicle so this can with an electrical Impulse such as to open a door or actuate the ignition trigger the redial and its owner over a second cell phone over warn of theft (in this case CN1 contacts 1+ and 2-) there Today mobile phone providers are offering a second "chip card" with another on the market Offer phone number. This variant is ideal for this application the customer has two different phone numbers in a usage contract Has. The latter is a prerequisite for the functioning of this alarm system.

The battery of the mobile phone is over the Car battery charged (on the diagram CN2 contacts 1 and 2). The connection CN3 is for the charging monitor. The microcontroller also controls the charging current. This will appear at certain intervals and switched off so that the phone can recognize the electricity charge. Furthermore, two contacts of the menu button are used.

The power for the controller comes from Mobile phone. This means that the battery from the phone has a minimum charge in order to initially supply the microcontroller with power can.

When commissioning must be guaranteed be that the battery has a minimum charge. Otherwise, that must Radio telephone that is installed in the vehicle once and for a short time be charged conventionally.

The power supply for the mobile phone must be otherwise come from the "cell phone battery" would at disconnecting the car battery the system will not work.

The connections on the menu button (CN2 Contact 3 and 4) are for the redial is responsible. The circuit connects the Contact 5 5 times in intervals from 1s.

This will be the first phone number selected from the list. This circuit can be set according to the type of telephone.

The redial is always after Repeats 5 minutes and thus ensures that even if the electrical impulse (door opening or e.g. ignition actuate) remains off, at least two redials have been made.

The time intervals between redials is independent on the number of impulses and on the duration of these.

The impulse for redialing can also by a motion detector e.g. in the theft of alloy wheels. In this type of theft jerky movements are mostly added to the vehicle.

The installed mobile phone can also be connected to the loudspeaker circuit of the vehicle as well the phone's microphone can be placed in a position that the noises transmitted in the passenger compartment can be.

Since the complete system has one Microcontroller is switched this is any telephone system customizable.

Claims (2)

Use of mobile phones as alarm systems for the application in motor vehicles. Marked that the driver or keeper at Theft or burglary in his motor vehicle itself is notified. Use of replicated electronic building blocks the similar Like a mobile phone, however, functions have at least the properties of for flag the use as an alarm.