How was the Parking Sensor Discovered?
In fact, as we know, this sensor is not a very new technology, but a technology that was discovered many years ago. Because it was first revealed in the 1970s and started to be used with a much simpler mechanism than today. In the following years, parking sensor technology developed gradually, and in 1983, Dr. Tony Heyes has received a patent for this system.
Parking sensors have been developed with new technologies by many different brands and have been used internally and externally in vehicles. The first use of this system in the automotive market was seen in Toyota Corolla models in 1982. In this vehicle model, parking sensors have been used with ultrasonic structure for 6 years. Likewise, today, there are two types of sensor structures, electromagnetic or ultrasonic. So how do the front and rear parking sensors come into play?
Parking Sensor Working Principle and Types
What is Ultrasonic Parking Sensor and How It Works
Ultrasonic sensors provide a great advantage, especially for novice drivers, as mentioned from the first point, thanks to their structures that have survived to the present day with an advanced technology. The ultrasonic parking sensor, which is still used in vehicles today, has a detector structure and enables the detection of objects located in close proximity, especially at the rear of the vehicle.
While obtaining a sonar structure thanks to ultrasonic parking detectors, an acoustic sound over 20,000 Hz is emitted, which the human ear cannot hear. Thanks to these sounds, the point where the object is located is calculated by taking into account the return speed from the sound reflection provided by the striking object. According to this system, the distance of the object that may be hit for the return signal to the driver is determined according to the distance and proximity, while the sound transmitted to the driver increases and decreases accordingly.
While developing the ultrasonic parking sensor, bats were used as the basic working principle. Because as it is known, bats detect the location of different objects and their prey with sound waves. In this system, the sensors at the rear point are connected with the reverse gear of the vehicle and the sensor loses its effect when switching to another gear. With the presence of sensors in the front of the vehicle, these sensors can be activated manually.
Ultrasonic parking sensors can be used after mounting in suitable slots on the vehicle bumper. While the system is effective on both transparent and reflective surfaces, it has an advantageous structure in terms of sound signals. However, sound waves may not reach as the objects that sound reflects become smaller. In particular, the opposite object is detected with an approach of at least 40 cm.
How Does an Electromagnetic Parking Sensor Work?
As a newer technology, the electromagnetic parking sensor working principle is as follows; creates an electromagnetic field in the bumper and detects the point where the object is. With the radio waves it sends to the object, it creates an analysis thanks to the radio waves that return and sends signals to the vehicle user with this analysis. These intermittent signals increase as they get closer to the object and decrease as they move away from the object. In this way, the driver detects whether it is approaching the object or not.
Electromagnetic parking sensors, patented in 1992, are practically used after being mounted on the inside of the vehicle bumper. While these sensors are easily mounted, they are placed in the vehicle by removing the bumper. Although it is not visible from the outside, it does not provide an aesthetic disadvantage. While the sensor starts to give signals 40 cm from the object, the signals continue up to a distance of 10 cm.
The electromagnetic parking sensor cannot detect beyond 0.8 meters. Especially in some systems, the parking sensor does not detect unless the vehicle is in motion. It is stated by some drivers that it does not work correctly in rainy weather.
How Does Front Parking and Sensor Engage? How does it work
We tried to answer this question in our article. The working principle of front or rear parking sensors is based on sensors. Wherever the sensors are attached to the vehicle, when that part approaches the object, it beeps intermittently or continuously with an audible warning. If you have parking problems, you can have parking sensors installed in your vehicle.
