Experimental data
Tests conducted using a computer bring up data showing changes in temperature, smoke concentration and the presence or absence of fire. dB/m (decibels per meter): indicates the degree of light attenuation in smoke, the larger the value, the denser the smoke. 0 and -1 indicate the presence or absence of an open fire, -1 means there is an open fire, 0 means there is none. Temperature is in degrees Celsius.
Other Test Pictures
First photo:
The fire alarm utilizes smoke and heat sensors to detect flames. I integrated them to improve performance after realizing that the alarms on the market were singularly functional and tested them in several iterations. After ensuring functionality, I used my own enclosure design and conducted safety and durability tests to ensure actual reliability.
Second photo:
The LED indicator changes from red (alarm) to blue (recovery), providing a versatile, intuitive alarm system. The round LED design enhances aesthetics and ensures accessibility for all users. This balance of function and aesthetics makes the fire alarm both efficient and user-friendly.
Third photo:
In standby mode, the fire alarm's flame-retardant plastic housing ensures safety and affordability. Future versions may use self-extinguishing plastic. My goal is to design a fire alarm that balances cost, functionality, and reliability so that more people can use it.
Photos of testing with a lighter while ensuring safety.
Photo 1
Photo 2
Photo 3
Test History
Challenges we've faced, how we've succeeded
Tests and Result
The first test was conducted on July 21, 2024 on a first generation prototype. During the test, we created smoke in a controlled environment and used a lighter to simulate a high temperature scenario.
Challenge
The results showed that the smoke alarm function responded normally and was able to trigger a beep quickly; however, the temperature alarm had a delay issue and triggered approximately 4 seconds slower than expected. In addition, the system failed to record the test data successfully, and the camera module failed to activate the video recording function correctly. At the same time, the equipment's fire prevention capability is weak.
Our solution ,how to continue to develop!
In response to the problems found in the test, we proposed specific improvement measures: replacing the thermistor with higher sensitivity, optimizing the startup logic, changing the power supply scheme, adjusting the connection of the USB interface, and changing the fire-resistant material used in the device to flame-retardant plastic. Improve the overall performance and stability.
With the gradual progress of function development, we introduce more usage scenarios in the subsequent tests, including high humidity environment test, camera recognition ability test in dark environment, and response efficiency evaluation of multi-sensor linkage, etc., to ensure that the device still performs well in complex real-world environments.