The automobile anti-theft device was controlled by the initial mechanical device and developed into an electronic code, a remote control, and an information alarm. Early anti-theft devices were mainly used to control interlocks such as door locks, doors and windows, starters, brakes, and cutoff oil, as well as to prevent thieves. A special socket wrench designed for dismantling parts. With the development of science and technology, automobile anti-theft devices have become increasingly rigorous and sophisticated, mainly for the protection of vehicles, and the introduction of new products.
Vehicle burglar alarm three anti-theft type
Vehicle anti-theft alarm can be roughly divided into mechanical anti-theft lock, electronic anti-theft device and GPRS network positioning anti-theft alarm
First, mechanical anti-theft lock
Mainly through the locking of the steering wheel, tires and other purposes to achieve theft, this anti-theft lock only anti-theft alarm, anti-theft performance is not complete. Because it is not anti-reported features are often easily destroyed by the master, and disassembly trouble. Its advantage is that the price is generally in the range of tens or hundreds of dollars.
The selection of the mechanical anti-theft lock is mainly judged by the lock body material and the lock core structure.
Second, electronic burglar alarm
Vehicle electronic anti-theft alarms rely mainly on locking ignition or start-up, vibration sensor alarm to achieve the purpose of theft. It also has anti-theft and audible alarm functions. Electronic anti-theft alarms are mainly controlled through remote control. At present, electronic anti-theft devices on the market are mainly divided into one-way remote control and two-way interactive remote control. In addition to one-way remote control anti-theft device with vibration detection gate protection and microwave or infrared probe function In addition, a number of convenient and practical additional functions have been added, such as: remote-controlled central locking, remote controlled air-conditioning, remote-controlled electric windows and doors, and remote opening of luggage compartments. The two-way function electronic anti-theft device has all the functions of the one-way anti-theft device. Besides, within a certain distance, it can not only control the vehicle by the owner of the vehicle, but also convey the status of the vehicle to the owner through the liquid crystal display on the remote controller. For example, which side of the door is opened or the window glass is broken.
but. The installation of electronic anti-theft alarms is more complicated and requires the removal and installation of vehicle circuits, which can easily cause damage to the circuit of the vehicle. Due to the adoption of infrared and microwave control, the effective distance between the control and the alarm is close; many burglars use wireless signal detectors to detect the vehicle control signal and then simulate the cracking of the anti-theft system.
The advantages of electronic anti-theft alarms for vehicles are mainly anti-theft alarm capabilities, which can play the role of reminding owners in a certain distance.
Third, GPRS network positioning burglar alarm
The vehicle GPRS network positioning burglar alarm uses the most advanced global positioning system to track the vehicle throughout the entire 24-hour period. When the position of the vehicle moves, it will immediately send an alarm signal to the owner of the vehicle to remind the owner. The positioning alarm also has the function of querying the position of the vehicle, driving trajectory and emergency alarm at any time. Your family can inquire your position at any time. When you are in danger of robbery, you can also call the emergency alarm. Due to the use of GSM phone alarms, the alarm signal is not limited by the distance. These functional features are unmatched by traditional mechanical anti-theft locks and electronic anti-theft systems.
Vehicle burglar alarm common troubleshooting
The use of car burglar alarm systems is based on the use of car power supplies and some of the car's own circuits. Once an alarm is detected, it will affect the normal use of the vehicle. This article analyzes the causes of some common faults and describes the processing methods. Most of the faults are handled by the user and can be resolved by reference.
Example 1. Symptom: The remote control does not work. When the remote control function keys are pressed, the red LED of the remote control does not light up.
Analysis of reasons: This fault is mostly in the remote control itself, and there are the following situations: (1) The battery is exhausted; (2) The battery is positive or negative and the reed is rusty or in poor contact; (3) The remote controller is rained or Water, oil, etc. In this regard, the circuit board can be removed, cleaned with industrial alcohol, dried with a household hair dryer or allowed to dry naturally before use.
Example 2. Symptom: The remote control distance becomes shorter and shorter. When the signal is transmitted, the LED brightness of the remote controller becomes dark or flickering.
Analysis of the reasons: This phenomenon is mostly battery power, replace the battery. In addition to this, it is recommended not to adjust or replace the components of the remote control yourself to avoid causing greater losses.
Example 3. Symptom: A function key of the remote controller fails. When this key is pressed, the LED indicator does not light.
Analysis of the reason: The failure of a function key (other function keys are normal) is mainly because the function keys are damaged or the soldering points of the key pins and the circuit board are detached. The keys of the remote control are mostly micro-switches, which are usually light when used, and they are waterproof, drop-proof, and heavy.
Example 4. Symptom: When the remote controller is not used, the LED indicators often turn on by themselves, or the LED indicator on the battery is always on, and the remote control does not respond.
Analysis of Causes: When the remote controller is not pressing the button, the indicator light is often on its own, and the button of the remote controller is usually mechanically damaged. The performance of the button is not good, there is no flexibility, replace the button. For the jump code type remote controller, pressing the function keys of the remote controller has no response. After the battery is replaced or the battery is reinstalled, the LED indicator is on for 20 to 40 seconds, and then no response occurs. This shows that the button is short-circuit damage, if there is no abnormality in the hand, use the multimeter R×1 file to test the buttons in the road, then replace the short-circuit button.
Example 5. Symptoms: The vehicle automatically shuts off and enters an alarm state after about 30 to 40 seconds of driving. After the anti-theft function is released, the above conditions are repeated during driving, and so on.
Analysis of reason: This phenomenon is caused by operating the remote control in the vehicle and causing secondary automatic theft prevention. As long as the anti-theft function key is pressed, the door is opened and closed again, and the problem can be solved. The remote control for automobile anti-theft system is limited by volume, and the function keys are generally not more than four, so that each key is often given several functions. Under certain conditions, the functions controlled by the same function key are different, or the function is more than one. With the completion of the keys, special attention should be used.
Example 6. Symptoms: The vehicle is in an anti-theft state and the anti-theft alarm is disabled with the remote controller.
Analysis of the reasons: In the anti-theft state of the system, due to failure of the remote control or system host (mainframe is mostly remote receiving circuit failure), causing the release of anti-theft failure (the remote control loses control of the system), the car direction light (dual lights) , The alarm horn often sounds and the vehicle cannot start driving. At this time, the anti-theft system can only be temporarily removed, which requires the user to pay attention to the general installation position of the anti-theft system host. If you do not know the location of the anti-theft device, you can find the system host according to the LED indicators of the anti-theft system, ultrasonic sensor probes or alarm horns, and unplug the connector of the alarm system host and the vehicle. In addition, some remote-controlled car burglar alarm system host has an emergency release function, you do not need to remove the system host, you can use the alarm to suspend.
Example 7. Malfunction: The car alarm system is working properly, and the ignition motor is operating normally, but the vehicle cannot be started.
Cause analysis: This phenomenon may be caused by an alarm or an electrical fault in the vehicle itself. Judgment method is: the car alarm accessories cut off the ignition relay (12V/30A, generally placed near the car's key door) short two thick lines, if the vehicle can start at this time, indicating that the anti-theft system is faulty, and mostly relay damage. If you short-circuit the two thick wires to cut off the ignition relay, the vehicle still cannot start, indicating that the circuit of the automobile itself is faulty. In addition, when the vehicle encounters a bumpy road during driving, it is easy to turn off or instantaneously turn off. Special attention should be paid to whether or not the normally closed contact of the ignition switch is cut off and the wiring is loosened.
Example 8. Symptoms: When turning on the car while turning the light, the other side is also bright.
Analysis of reason: This fault is the diode breakdown of the voltage output of the anti-theft system controlling the car's directional light (dual helium lamps) (some of the two diodes are inside the host, and some are attached to the connection). Excluding the same type of diode can eliminate the problem. malfunction.
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