In the era of rapid development of science and technology, from the start of the semiconductor era, our lives stop gradually changed. Everywhere from simple computer to the network terminal, the electronic system. Meanwhile, back in the late 1970s and early 1980s, when produced with large etching silicon structure and etched back diaphragm pressure sensor. Since the vibration of the thin silicon film is deformed under pressure, will affect its curve of the surface of the varistor, this change can convert a pressure into an electric signal. The circuit later moving mass of capacitive sensing accelerometer, gyroscope used to trigger automobile airbags and positioning. These technologies currently used in car navigation, car security. Automotive safety for the vehicle is divided into two major aspects of the active and passive safety. Active safety: is to try to ease the manipulation of control car. Both braking and acceleration on the straight line or around the direction of play should be as smooth as possible, and will not deviate from the established route, but does not affect the driver's field of vision and comfort.
Passive safety: refers to a car accident after the vehicle occupant protection, this protection concept, as well as inside and outside the vehicle extends to all people and even objects.
Active safety is absolutely the most critical part of the technology in the automotive electronics R & D, especially in the automatic collision avoidance design, the main contents include the vehicle front / rear / side collision warning (FCW), panoramic surveillance video system (AVM), lane deviation from the warning (LDW), the reversing image recognition system (RVC), tire pressure monitoring system (TPMS) and driver fatigue warning and so on.
But so many active safety systems, how do choose it? To make the right choice, first to understand the other side is a must, "Know thyself, ever-victorious". Next, small as we explain more practical electronic active safety systems, and many electronic systems can be installed after, everyone can be a choice based on their driving habits and needs. Of course, the active safety system ESP, ABS and other vehicle control yet can not be generally after the installation, and can only be modified in order to obtain.
, The panoramic surveillance video system (AVM) with the reverse image recognition system (RVC)
Storage in dense cities parking is a depressing thing, especially in the commercial center of the underground car park. The owners of a small space for parking a test, especially beginners. Inevitably sometimes some small collision will occur. After all the vehicles in close cases or many visual dead ends.
The traditional optical car sight Auxiliary:
Most of the vehicle or the traditional optical sight auxiliary, but enough for the veteran who has been completely. But some of the smaller low objects or children or easily ignored. The panoramic surveillance video of the original system (AVM)
With the increasing of the camera CCD technology and electronic system level, many depots launched by four cameras to monitor vehicles around a variety of road conditions, the formation of a top-down look at the visual effects, the panoramic surveillance video system (AVM ). Can be installed after the the reversing image recognition system (RVC)
Usually when we drive, the distance of the front car is quite easy familiar grasp. Car rear vision blind spot, distance and road conditions are often difficult to grasp, for car reversing visual system is not installed, or more cost effective to spend money to install a reverse image recognition system. Active safety systems installed after the reverse image
The frequency of use of the reverse image in the road can be described as very high, after all, entails a drive-parking. In particular, some intensive business district parking lot, if there is a reverse image is very helpful.
Second, the lane departure warning (LDWS)
When we were driving, always can not be avoided to distract us several things happen. Such as a telephone, or roadside small things, or if he suddenly remembered some of the public service. Fatigue driving is inevitable distraction. Automotive safety experts pointed out: about 50% of car accidents are caused because the car deviates from the normal driving lane, the main reason is distraught mind of the driver inattention or driver fatigue. The system provides intelligent lane departure warning alert deviate from the original lane in the unconscious (the driver does not hit the turn signal) in 0.5 seconds before veering off the road for the driver's reaction time, greatly reduced due to lane departure collisions triggered LDWS can correct the driver does not hit the turn signal habits, the system and its main function is to remind overtired or prolonged monotonous driving caused by inattention.
Such as the Volkswagen CC configuration lane departure warning system can rely on more than the 65km / h speed lane marking to maintain tracking a slight correction direction, once the danger of veering off the road vehicles, will lead the steering mechanism of electronic control devices gentle firmly, "Squeak look as if by magnetic attraction front to quickly drove back on track.
Although this system safety for motorists not only help, but also correct some motorists not to fight the bad habits of the turn signal to change lanes or turning. Set security system also can be installed, but there are some differences with the front-loading. Afterloading increase the entire system in the central LCD display, and at night with night vision systems. After all, after installed, so not like pre-installed as the direction automatically back positive function.
Afterloading: use the same robot vision
Afterloading lane departure warning system and pre-installed configuration almost have to use a high-tech robot vision as lane standard analysis unit. But after all, not in conjunction with the original car design, so after installed to automatically back to the lane departure direction.
Third, tire pressure monitoring system (TPMS)
TPMS we see that one might think of wireless tire pressure monitoring system, but in fact TPMS only on behalf of a tire pressure monitoring system, and must be wireless. Currently TPMS There are two main points:
The first is a wheel speed differential induction, use of front and rear the group wheel speed sensor for the left and right wheel speed comparison, if a an error RPM will prompt a tire pressure anomaly. The second is the relatively high cost of a wireless tire pressure monitoring system, the use of a way to measure the tire pressure and the wireless transmission of data, and the installation of a sensor in the interior of the tire.
This tire pressure monitoring cost is more expensive, but it can be very accurate read out the tire pressure of each wheel, and every time we overwhelm the nail on the highway, we can estimate the leak rate, if allowed, can be opened to repair reprocessing plant without the need for the moment to change a spare tire. However, the products with the depletion of the battery (3-5 years), and can not replace the battery, we can only replace all. Wireless tire pressure monitoring system
Of course, the high cost of course high. From the figure can be seen that each individual wheel tire pressure, temperature. Lane when alarm occurs when we can under the leak rate decision to place the replacement tire or support to the nearest repair factory fill tires. This tire pressure monitoring afterloading market more popular, less use of front-loading.
Summary:
Although a wide variety of security systems, but after the introduction of about screening function, all of these products also have a certain understanding. Security system you need everyone can be selected depending on the status of their own driving habits. For example, some novice or often in dense parking Parking owners can consider installing Rear view. Often car rushing business owners can consider installing a lane departure warning system, prevent fatigue driving when the accident. Often run mountain road or bad way owners can consider the installation of tire pressure monitoring, prevention tires stone scratched or overwhelm nails leak pose a security risk to the lane.
Of course, the eyes of the beholder, the wise see wisdom. Individuals have their own different needs, different views. Finally, I hope you are able to find based on their own needs to the rival products.
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