Contactless Temperature Sensor ECE342-W22
By
The Contactless Temperature Sensor was a project for ECE342 Junior Design II done during the Winter Term of 2022. As the project was done during the Covid-19 pandemic, the use of the temperature sensor was to accurately determine what a person's temperature was without them needing to interact with the system. As such, there are three main technologies being used in order to perform this operation. First is the MLX90614 Temperature Sensor. This device uses IR waves in order to measure the temperature of the object in front of it and therefore can be configured for human skin temperature. The next technology was the VCNL4040 Proximity Sensor which used IR waves in order to get the distance for any object in front of it. Lastly, a custom PCB was designed and manufactured in order to act as a relay between the individual components and the microcontroller used, allowing for modularity and ease of use compared to conventional prototyping methods. The most notable accomplishment of this device was the additional requirements that were added on as an extra challenge. The main one, and most noticeable, was the ability of the system to enter a sleep state. When not reading, the system would automatically go into standby without human interaction. This would save on power and increase the longevity of the components inside of it. After 5 minutes, a deep shutdown would begin turning the device off. These two systems not only reduce the work of the device but also allow the user to save power in the long run. No other group attempted this and it was very impressive by Junior Design standards. Areas of future improvements would be adding data transmission to a server so that data access would be easier, the implementation of RFID scanning technology so that data on specific users could be logged, and an external display on a desk or within a kiosk for easier usability.
Artifacts
Name | Description | |
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Block Diagram | The top-level and functional block digrams of the system. | Download |
Mechanical Drawings | The mechanical drawings for the system | Download |
Electrical Schematic | The full electrical schematic of the system | Download |
PCB Layers | The PCB Layers of the custom-made PCB used in the system. | Download |
Engineering Requirements | The engineering and customer requirements the system had to meet. | Download |
Executive Project Summary | Written summary explaining the original design problem and how the team approached the project. As well as what we learned as a team and the project timeline. | Download |
Code | The code used for the system | Download |
Project Summary Video | A video going over a summary of the project as well as future ventures if we were to continue the project | Link |