A parking assistant is an electronic system that makes parking a vehicle easier, especially in tight spaces.
Passive systems
Under this category, orientation points can be included on the vehicle or in the parking space, which help determine the position of the vehicle with respect to it. An example of these systems are the flexible bars at the ends of the front bumper on some older trucks, since this is not visible from the cabin.
The predecessors emerged in the 1960s, some large luxury vehicles (especially Cadillac and Mercedes-Benz) integrated into their design the then popular tail fins that served as additional orientation points at the rear of the vehicle. Mercedes-Benz implemented two expandable antennas on both sides of the trunk in the S-Classe S (W140) to facilitate reversing when parking. These antennas were later replaced by an active parking system.
Active systems
Contenido
En el 2008 existen dos tipos de conceptos de reglaje utilizados en vehículos. Independientemente del concepto implementado el conductor del vehículo recibirá, según el fabricante, una señal acústica u óptica o una mezcla de ambos según la distancia a un objeto. La versión exclusivamente acústica alterará la frecuencia del pitido hasta hacerlo continuo a medida que el vehículo se aproxime a un objeto, activándose a distancias menores de aprox. 30 cm. Los sistemas óptico-acústicos muestran por medio de LEDs o gráficos la distancia de forma visual. El BMW X5 supuso un avance en este campo haciendo uso de una cámara trasera y de ayudas gráficas en forma de guía (overlays) mostrando dinámicamente la ruta seguida por el vehículo según el giro del volante y así ver la trayectoria teórica de este en la pantalla de la videocámara.
Ultrasound-based systems
These systems work with ultrasonic sensors, which are integrated into the bumpers. There is a difference between systems with 2, 4 and 6 channels, or circular sensors inserted and painted with the same color as their surroundings. The more sensors, the more precise the measurement resulting from all of them will be, although, as is evident, a wider vehicle will require more sensors than a narrow one. The sensors send and receive ultrasonic signals and send the data received to an electronic switchboard to be processed and the closest distance to an object is calculated.
Smart Parking Sensors
Introduction
A parking assistant is an electronic system that makes parking a vehicle easier, especially in tight spaces.
Passive systems
Under this category, orientation points can be included on the vehicle or in the parking space, which help determine the position of the vehicle with respect to it. An example of these systems are the flexible bars at the ends of the front bumper on some older trucks, since this is not visible from the cabin.
The predecessors emerged in the 1960s, some large luxury vehicles (especially Cadillac and Mercedes-Benz) integrated into their design the then popular tail fins that served as additional orientation points at the rear of the vehicle. Mercedes-Benz implemented two expandable antennas on both sides of the trunk in the S-Classe S (W140) to facilitate reversing when parking. These antennas were later replaced by an active parking system.
Active systems
Contenido
En el 2008 existen dos tipos de conceptos de reglaje utilizados en vehículos. Independientemente del concepto implementado el conductor del vehículo recibirá, según el fabricante, una señal acústica u óptica o una mezcla de ambos según la distancia a un objeto. La versión exclusivamente acústica alterará la frecuencia del pitido hasta hacerlo continuo a medida que el vehículo se aproxime a un objeto, activándose a distancias menores de aprox. 30 cm. Los sistemas óptico-acústicos muestran por medio de LEDs o gráficos la distancia de forma visual. El BMW X5 supuso un avance en este campo haciendo uso de una cámara trasera y de ayudas gráficas en forma de guía (overlays) mostrando dinámicamente la ruta seguida por el vehículo según el giro del volante y así ver la trayectoria teórica de este en la pantalla de la videocámara.
The first parking assistant based on this system was developed by the company Hella") for the manufacturer Volkswagen. Depending on the manufacturer, it has different names, Audi calls it APS (Acoustic Parking System), BMW PDC (Park Distance Control), Mercedes-Benz PARKTRONIC and Volkswagen ParkPilot.
The field of application of this system has increased and they are currently operational at a speed of 20 km/h for measuring the distance to the preceding vehicle in traffic jam situations in which the vehicle is traveling at a limited speed. There are elements such as pressure brakes on trucks or buses or pneumatic pile drivers) that can cause interference. These devices can be installed after sales.
Radar based systems
The first radar-based system was made possible by means of a radar close to the millimeter area and was marketed under the term Parkassistent in 2005 in the Mercedes-Benz S-Class (W221) as well as in 2006 in the CL-Class (C216) "in combination with the automatic distance regulator"). The measurement principle is the same as ultrasound, but using radar signals. The advantage is that no additional sensors are needed, which brings with it a number of advantages:
The disadvantage of this system occurs in situations with significant rainfall. Radar sensors may occasionally recognize rain in front of the bumper as an obstacle.
Self-parking systems
In addition to the systems that control the distance of the vehicle to nearby objects, there are also parking assistants that are responsible for carrying out the entire maneuver on their own, turning the steering wheel and moving the vehicle automatically. The basis is an active parking system as previously described together with an electromechanical servo, powered by an electric motor, as well as measurement sensors in a direction transverse to the direction of movement of the vehicle. Some also require a rear camera with which the driver can choose the desired parking space before the automatic parking maneuver begins.[1].
After the maneuver is started by pressing the button, the sensors measure the free space in the transverse direction. If the size of the parking space is sufficient, the driver will receive a notification. The driver only has to stop the vehicle at a certain distance from the parking space, engage reverse gear and press the accelerator pedal carefully if the traffic situation allows it. The turn assistant is responsible for turning the steering wheel in both directions. At the moment when the vehicle reaches the minimum distance backwards, the driver must brake, shift into forward gear and then he himself must drive forward.[1] The necessary maneuvers are carried out with the help of clothoid guides with a constant angle travel calculation. Because the driver is the one who presses the brake and accelerator, he is responsible for parking. These types of systems are available from Audi, Lexus, Toyota and Volkswagen.[2].
These systems work with ultrasonic sensors, which are integrated into the bumpers. There is a difference between systems with 2, 4 and 6 channels, or circular sensors inserted and painted with the same color as their surroundings. The more sensors, the more precise the measurement resulting from all of them will be, although, as is evident, a wider vehicle will require more sensors than a narrow one. The sensors send and receive ultrasonic signals and send the data received to an electronic switchboard to be processed and the closest distance to an object is calculated.
The first parking assistant based on this system was developed by the company Hella") for the manufacturer Volkswagen. Depending on the manufacturer, it has different names, Audi calls it APS (Acoustic Parking System), BMW PDC (Park Distance Control), Mercedes-Benz PARKTRONIC and Volkswagen ParkPilot.
The field of application of this system has increased and they are currently operational at a speed of 20 km/h for measuring the distance to the preceding vehicle in traffic jam situations in which the vehicle is traveling at a limited speed. There are elements such as pressure brakes on trucks or buses or pneumatic pile drivers) that can cause interference. These devices can be installed after sales.
Radar based systems
The first radar-based system was made possible by means of a radar close to the millimeter area and was marketed under the term Parkassistent in 2005 in the Mercedes-Benz S-Class (W221) as well as in 2006 in the CL-Class (C216) "in combination with the automatic distance regulator"). The measurement principle is the same as ultrasound, but using radar signals. The advantage is that no additional sensors are needed, which brings with it a number of advantages:
The disadvantage of this system occurs in situations with significant rainfall. Radar sensors may occasionally recognize rain in front of the bumper as an obstacle.
Self-parking systems
In addition to the systems that control the distance of the vehicle to nearby objects, there are also parking assistants that are responsible for carrying out the entire maneuver on their own, turning the steering wheel and moving the vehicle automatically. The basis is an active parking system as previously described together with an electromechanical servo, powered by an electric motor, as well as measurement sensors in a direction transverse to the direction of movement of the vehicle. Some also require a rear camera with which the driver can choose the desired parking space before the automatic parking maneuver begins.[1].
After the maneuver is started by pressing the button, the sensors measure the free space in the transverse direction. If the size of the parking space is sufficient, the driver will receive a notification. The driver only has to stop the vehicle at a certain distance from the parking space, engage reverse gear and press the accelerator pedal carefully if the traffic situation allows it. The turn assistant is responsible for turning the steering wheel in both directions. At the moment when the vehicle reaches the minimum distance backwards, the driver must brake, shift into forward gear and then he himself must drive forward.[1] The necessary maneuvers are carried out with the help of clothoid guides with a constant angle travel calculation. Because the driver is the one who presses the brake and accelerator, he is responsible for parking. These types of systems are available from Audi, Lexus, Toyota and Volkswagen.[2].