Parking radar for most motoristscauses associations with distance sensors. These are ultrasonic sensors that transmit to the driver the characteristics of a signal received from objects close to the car. The electromagnetic principle of determining the critical distance and the risk of collision is less common. In such systems, sensor tapes are used instead of sensors, which also transmits a fixed approximation signal to the central control unit. In practice, when operating parktronic electromagnetic gives many advantages, but also suffers from disadvantages. To assess the strengths and weaknesses of this device in the complex, you should read more about it.
The principle of the device
Technologically, two devices are involved in the operation of the device.Component - microcontroller and electromagnetic tape made of aluminum. The controller board in the process of operation receives a signal on an oscillatory circuit with a certain frequency. The signal source is the tape itself, that is, the strip-antenna of aluminum foil. By the way, a similar principle of object detection is used in low-cost models of metal detectors. Only in Parktronic the range of target items is much wider. Equipment, according to manufacturers, is able to fix the distance to metal, wooden, concrete and other objects. After registering the signal, the controller responds through the speakers. Today, popular parking sensors, which informs the driver about specific indicators of distance. The simplest models use an acoustic warning system from several levels. For example, a rare squeak is reproduced at a distance of 20 cm, and it increases by 15 cm.
Comparison with ultrasonic sensors
The electromagnetic principle of operation is newer andmore technologically, but not to say that it replaces the usual ultrasonic sensors. Indeed, the use of a tape antenna gives several significant advantages. For example, when an object is detected, there is no difference in its shape - it can be a chain-link, a thin pole, or a metal sheet. Active space is scanned completely without "dead" zones. In turn, the gaps between the sensors still give the probability of missing a small object, although the probability of such situations is small. In addition, parking sensors electromagnetic does not require the owner to create mounting holes. On the surface of the tape there is a factory adhesive coating on which the active element sits.
How do sensors benefit from a tape counterpart?The fact is that piezoceramic sensors form a monitoring zone consisting of several sections. This allows you to display graphic information indicating the approximation data in different parts of the machine. In the case of an electromagnetic sensitive strip, this approach is impossible, since the voice-activated parking sensors give readings in general from a solid line of observation. That is, if there is a critical approximation tape on the back side, then when the alarm sound information is received, the user will not know the exact place of the likely collision.
Installing the system
Installation work is facilitated by the reason thatthere is no need for complex plumbing operations with deformation of the bumper structure. But at the same time there will be, perhaps, an even more crucial task - the same construction will need to be removed. Dismantling is done in order to enable the tape to be accurately connected to the onboard network. The very same installation is implemented quite simply, but after the bumper will be thoroughly washed and cleaned on all sides. Usually, electromagnetic sensors are fixed on the “native” adhesive layer, but you can add a mounting effect using longitudinal strips of adhesive tape. And you need to have a strip on the front side. Many people mistakenly stick a tape at the bottom of the bumper, but this scheme violates the rule of observing the remoteness of the sensor from the ground. A distance of about 40-50 cm should be respected.
How to connect tape parking sensors?
Типовой алгоритм подключения предусматривает the formation of a network consisting of at least 4 points. This is powered by the battery pack, the tape itself, the controller and the audible warning system. These components are connected using bundled cables that provide power and information transfer. If you plan to install parking sensors with a mirror and a camera, then you will need to lay lines for video transmission. This circuit will start from a camera installed in the region of the electromagnetic strip and will end in a rearview mirror equipped with a small monitor.
User Reviews
Owners of electromagnetic parking devicesnote their high sensitivity. The system reacts quite sharply to approaching third-party objects when the distance is reduced to 30 cm. But unpleasant operational nuances are also noted. Basically it is a situation where there is no movement. If a potentially dangerous object is inactive, and the car itself is not traveling, then electromagnetic parking sensors will be silent. Reviews indicate that even with an initially critical distance of less than 30 cm, the system will remain silent. And only at the beginning of the movement Parktronic will begin processing the signal. Therefore, being in cramped conditions prior to the beginning of the maneuver, one will have to rely only on one’s own forces in assessing the position of the machine.
How much is parking sensor electromagnetic?
Development of parking systems involved in almostall major automotive accessories market participants. First of all, these are Cobra, Parkmaster and Flashpoint, offering quality-worthy kits with price tags of about 4-6 thousand rubles. Interesting inexpensive options are offered in the Tiger TG line. The basic model U 301 is available for only 1 thousand, but it includes only a boozer. More attractive are devices with a LED display, to which the U 302 modification also applies. A belt-mounted parking sensor in this version costs about 2 thousand.
What to consider when choosing?
Approach the choice is with a clear viewabout the possibilities of practical operation of the system. It is important to assess how useful an advanced kit with a camera and a rear-view mirror can be. This solution is usually resorted to beginners who want to protect themselves with additional information. On the other hand, parking sensors with a mirror and a monitor built into it can be a distraction, which is also undesirable. In a separate order is calculated and the ability to install a wireless tape detector, which eliminates the need for laying cable lines.
Conclusion
Electromagnetic stripe systems stilldemonstrate instability in the work and cause a lot of problems due to the shutdown at the moments of stopping the machine. This kit is interesting for its simplicity and affordable price tag, but the practice of operation reveals many unpleasant nuances. Therefore, at a minimum, it is worthwhile to focus on models with a high-quality technical basis, an example of which is shown by the same U 302 model. The belt electromagnetic parking sensors, among other things, must support modern communication capabilities. It is desirable that the model can connect to the tablet or GPS-navigator. This will smooth out the individual ergonomic nuances of system management. In general, the concept of electromagnetic radar is still quite raw, but it is possible that manufacturers will be able to develop the idea to a new level in the coming years.
