Spotwatch LLC
Spotwatch LLC is developing a non-invasive, wireless smart parking detection system to be mounted on street lamp posts in parking lots. The system will use four embedded cameras to detect the occupancy status of nearby parking spots using machine learning and wirelessly transmit the data for real-time usage by drivers in university settings.
This project is actively being pursued at the University of Michigan with collaborations with Logistics, Transportation, and Services and the University of Michigan Division of Public Safety & Security.
Significance
This project is focused on creating a professionally refined enclosure and installation model for our device. This includes addressing real-world challenges like environmental resilience, public safety, and ease of manufacturing, maintenance, and design.
Goals
Design Non-Invasive, Aesthetic Enclosure
Ensure the device does not appear intrusive or “surveillance-like” to the public.
Blend into existing street infrastructure while maintaining a distinct, modern identity.
Apply human-centered design principles: public perception, installer ergonomics, and city worker accessibility. Develop prototypes at low-fidelity and high-fidelity stages, with feedback cycles from stakeholders.
Design around four outward-facing cameras, optimizing visibility and coverage. Prevent lens obstruction due to weather, birds, or debris while maintaining line of sight. Protect internal electronics (LoRa, ESP32, power modules) from heat, cold, moisture, dust, and UV exposure.
Ensure mounting mechanisms are safe for public installation (non-fall risk). Include sealed yet accessible ports for maintenance, firmware flashing, and cable interfacing.
Consider injection molding, 3D printing, or sheet metal fabrication depending on cost and scale.
Mechanical Functionality
Beginning Prototype
The Device mounted on a street pole
The prototype was successful and able to function as intended, detecting parking spots, using machine learning. However, it was not prone to harsh weather conditions, and needed a shell or a covering to house all the components (battery, 4 cameras, raspberry pi +, lora, antenna, two solar panels), making it secure and easy to mount on the lamp post.
The Mechanism
The device will have a rubber strip that will cup the lamp post to provide friction, ensuring secure placement. For easy tighening and mounting, there will be a latch and a locking clamp mechanism. After discussion and multiple iterations, our team decided to use a heavy duty velcro instead of a latch for the MVP.
Fusion 360 CAD
Vent design and camera openings.
CAD hinge design for locking clamp mechanism.
High fidelity rendering in Blender.