Entrance/Exit Node
The CAD design shown above is the design developed for demonstration purposes. They were developed using SOLIDWORKS CAD design software.
The LCD display is attached to the front of the unit, along with a pair of ultrasonic sensors. A pill-shaped slot was made in the front
of the unit in order to extend the tollgate barrier arm which is controlled by the servo motor from inside of the unit to the outside.
The Raspberry Pi camera holder is fixed at a certain angle in order to get a clear and uninterrupted view of the license plate numbers of
incoming vehicles. The camera holder was 3D printed. The thin slot was made within the inside of the holder in order
to insert the cable connecting the camera and the Raspberry Pi.
The Entrance/Exit Node was designed
to be reopenable from the back of the unit for repair and maintenance requirements.
Spot Node
The CAD designs for the Spot Node were developed using Autodesk Fusion 360.
The design consists of two pillars; one solid and the other hollow.
The hollow pillar has a servo motor connected to the top of it such that the Spot Node gate can be controlled through
this motor.
The hollow pillar provides an enclosure for the NodeMCU ESP8266 and the connecting wires.
The HC-SR04 ultrasonic sensor attached to the hollow pillar can be used to detect the occupancy status of the parking spot.
Additional CAD models for the NodeMCU ESP8266, the servo motor, the HC-SR04 ultrasonic sensor and the sensor holder have been
imported using the GRABCAD community library.