Car alarm sensor principle is very simple: if someone hit, strike, or move your car, the sensor will send a signal to the controller, indicating vibration intensity. According to the intensity of the vibration, the controller will issue a warning beep or full sounding the alarm. There are many methods to assemble car alarm sensor. There is a kind of sensor is relatively simple, composed by two metal contacts, the longer flexible metal contact is located on top of the other metal contact. You can easily set these the contacts into a simple switch: when they are in contact with each other, the current will pass. When the vehicle violent shakes, the elastic metal contacts will follow shaking, and expose to the following contact plate, thereby temporarily form a closed circuit. The problem of this design is that the circuit will be closed as long as the car is vibrating or shaking, and the controller cannot measure vibration intensity, so it is easy to cause false positives. More advanced sensors can transmit different information based on the strength of the vibration.
ultrasonic alarm sensor
A set of state-of-the-art car alarm system should also include a separate alarm, the alarm can issue sharp siren. A lot of noise makes people notice the car thieves, so most car thieves will quickly fled the scene when sirens sound. Some alarm systems have set the alarm sound; you can select a unique sound, so as not to confuse with other vehicles. Some alarm systems can play a recorded warning when someone is too close to the vehicle. The main purpose is to warn the thieves that your car is equipped with a state-of-the-art ultrasonic alarm sensor before the theft. In most cases, the recidivists ignore such warnings, but for amateur car thieves who try their luck, this will play a strong deterrent. In a sense, this gives the alarm system the power to deter criminals. Inadvertently, your car is not just a concoction of the device, become equipped smart machine.
From the 1990s to the present, the car alarm system has rapidly developed, which is applied more and more widely. In the next decade, we believe that the car alarm system will use more high-tech. Car GPS receiver has opened a vast world for the field of security. If the receiver is connected with the alarm system controller, it can report the position of the vehicle to the owners or the police at any time. In this way, even if the car is stolen, you can quickly get it back.
www.chinacaralarm.com is a company specializes in producing and developing auto electric products, such as car alarms, motorcycle alarms, parking sensor, universal power window kits and central door locking systems.
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