Alarm attempt to prevent the theft of car

Alarm attempt to prevent the theft of car An alarm is a device in a vehicle in an attempt to discourage the theft of cars. Most alarms work by a loud sound. Other alarms disable the ignition of the car, or send a message to the owner (by an avalanche) that his car alarm car is unaffected by vibrations, tilting the machine (to prevent the trailer), or touching the machine. The vast majority of car alarms, the sound are random. They are supported by a transfer of large trucks, the vibration of thunder or people touching the machine (to tie the shoe on a bumper). Since most car alarms are random, most people in American cities are numbed to the sound of memories, and do nothing to prevent theft. New York City Police Department claims that car alarms in fact the crime problem worse (see their booklet called "Police Strategy No. 5: The recovery of public spaces in New York," City of New York, New York, 1994) because it does nothing for the memories, the overall impression is that nobody cares about the neighborhood. Due to the large number of false alarms with car alarms, many vehicle manufacturers no longer factory fit alarms offer in silence - but effective - instead of immobilizers. As a post-installation, a system for tracking the vehicle, which allows the police to report stolen vehicles is much more effective. Both classes of devices in case someone tries to register the vehicle without consent, but not for theft or vandalism, the vehicle. If you want to have a car alarm in its simplest form, which is one or more sensors connected to a kind of siren. The simple waing system would have a switch on the driver's door, and would be wired so that if someone has opened the door of the siren will Wailing Wall. You can use this car alarm with a switch, a couple of pieces of wire and a siren. Most mode car alarm systems are much more demanding than this. This is: a series of sensors that can switch, motion sensors and a siren, often able to offer a variety of sounds so that you can use your own sound for your car radio receiver for wireless control In a key auxiliary battery so that the alarm, even if the battery is disconnected, a computer monitor that control everything and alarm - the "brain" of the system, the brain, in most mode systems has been actually a small computer. The brain of the workplace is to conclude that the switch to activate alarm devices - the ho, headlights or an installed siren - when certain switches, sensors, power devices are opened or closed. Security systems differ mainly in which sensors are used and how the different devices are connected to the brain. The brain and the functions of alarm can be connected to the main battery, but usually have a backup source of energy. This hidden battery applies when someone cuts the main power source (battery by cutting the cables, for example). Since the power cut is a possible indication of an intruder, it triggers the brain to sound the alarm. The crucial element in a car alarm system, door alarm. When you open the bonnet, trunk or a door to a fully protected machine, the brain triggers the alarm system. Most alarm systems use the exchange mechanism, which is already upon us. In mode cars, opening a door or the trunk will tu on the lights inside. The switch, this work is the mechanism of the light in your refrigerator. If the door is closed, is expressed in a small, spring-activated button or lever, which opens the circle. When the door opened, the spring pushes the button for opening, closing the circuit and sending electricity to the light. All you need to do to the door sensor is a new element of this pre-wired circuit. With new lines in place, opening the door (closing the switch) sends an electric current to the brain in addition to the lights inside. If this current, which causes the brain to sound the alarm. As a security generally, mode alarm systems typically drive voltage for the electrical circuit. If there is a drop in voltage in this circuit, the brain knows that someone has interfered with the electrical system. A light (with the opening of the door), brass with electric wires under the hood or remove a trailer with an electrical connection would be all for such a lowering of tension. Door sensors are highly effective, but they offer limited protection. There are other ways to get in the car (breaking a window), and thieves do not really need to steal your car in you (which can tow the car away). Over the next few paragraphs, we address some of the most advanced car alarm systems, which protect against craftier criminals. In those days, only the packages cheaper car alarm sensors at the door only. Advanced alarm systems depend mainly on shock sensors to deter thieves and vandals. The idea of a shock sensor is fairly simple: if someone takes jostles or otherwise moves the vehicle, the sensor sends a signal to the brain by the intensity of the movement. Depending on the severity of the stroke, the brain signals an audible waing ho or sound the alarm on a large scale. There are several ways to provide a shock sensor. A simple sensor has a long, flexible metal contact positioned just before another metal contact. You can easily configure these contacts as a simple switch: When you touch them together, the current flows between them. Severely shaken flexibility will ensure that the contact to prevail, so that it touches the contact form below, the implementation of a short circuit. The problem with this project is that all the bumps and vibrations Connect the circuit in the same way. The brain has no way of measuring the intensity of the shock, which translates into a lot of false alarms. More advanced sensors send different information depending on how severe is the shock. The design is shown, patented by Randall Woods in 2000, is a good example of this type of sensor. For more information about the alarm system, please visit the Resource Center alarm.