Brief information about the system
Nowadays, when there is a high concentration of cars, many cities decide to create multi-storey parking lots so that people coming from outside the city can park their car and switch to public transport, so that without causing traffic jams in the city, they can travel to their destination by public transport. Large car parks, often multi-storey or underground, are built at airports, at railway and bus stations, at shopping centers, sports stadiums and other public buildings. Finding a free space can often be difficult because you do not have a clear view of the entire parking lot while sitting in the car. For this purpose, modern parking lots offer systems that guide the driver to the best free space.
The parking management system, often called Smart Parking Management System, shows the driver by means of small displays with arrows and numbers on which level there are free parking spaces. Additional colored lights allow you to find a parking space precisely from a distance.
Often, multi-storey parking lots are equipped with a large display at the entrance which shows information about free spaces on all levels of the parking lot. This way the driver knows which level it is best to go to immediately.
In some cases, the systems work with access cards, payment systems, barriers, and vehicle license plate readers. This allows access to the parking lot for authorized vehicles or the collection of parking fees.
The simplest system to help drivers find an available seat consists of the following components:
Car Presence Sensor
Usually the sensors detect the car using ultrasound and are placed above the parking space. In addition to detecting the presence of a vehicle, the sensor either has an integrated lamp that indicates free spaces in green and occupied spaces in red. Blue is also used to signal disabled or priority spaces. Often, however, a separate beacon is used which is positioned closer to the parking aisle so that it can be seen more clearly, as there are many columns supporting the ceiling in parking lots and these obstruct visibility.
Row Parking displays
In order to direct drivers to the correct aisle in the parking lot, small displays are installed at each junction, which show the direction with arrows and the number of free spaces. Or they show that there are no more free spaces in a particular alley. Such displays usually have 2-3 digits and an arrow. It is good when the arrow is animated, because it increases the readability of the shown direction.
Main parking display
At the entrance to the parking lot as well as on each level, larger displays are used to show the number of free spaces on all levels.
Modbus/Ethernet interfaces and cabling
Sensors and displays must communicate with the main computer or local server. In order to ensure the lowest possible failure rate and continuity of communication, radio communication is not used in roofed parking lots due to the higher susceptibility to radio communication interference. Radio sensors are used in open parking lots where sensors are located in the floor and it is difficult to run cables underground and then battery power is used, which unfortunately is not desirable from the ecological point of view. In roofed parking lots wiring going under the ceiling is used so it is easy to repair. Mostly sensors communicate by Modbus RTU or Ethernet interface.
The server manages all sensors, displays and make statistics of use. If require it is possible to configure server for sending all data to the dedicated cloud service.