## 3 Experiment  
The fire detection system's effectiveness in detecting fires was evaluated through comprehensive testing under varying experimental conditions, considering both short-range and long-range capabilities. Table 1 provides an overview of the experimental conditions, while Figure 3 illustrates the system employed for the fire detection test. The experiments were conducted during daylight hours, acknowledging that environmental factors can influence the test results. Specifically, the presence of sunlight could emit UV radiation within the sensor's targeted range of 185-280 nm. To mitigate this, our fire  
Figure 2: Control circuit for the fire detection system. detection system implementation ensures that the sensor is not directly exposed to sunlight. In practical applications, the device is installed overhead, facing downwards. For assessing the system's short-range capabilities, a candle was utilized as the test fire, positioned at distances ranging from 1 to 10 m. The distance between the fire sensor and the candle was accurately measured using a laser distance meter (Leica Disto D2, Leica Geosystems AG, St. Gallen, Switzerland), which provides a measurement range of up to 100 m. To identify the fire's location, the fire detection system was rotated around the test area, comparing the density of generated pulses. The outcomes of the experiment, specifically the results obtained at the fire's location, are presented in Figure 4.  
To evaluate the system's long-range detection capability, a fire with a size of 300 mm \(\times\) 300 mm was used as the test object. The experimental setup and results for the long-range test are shown in Figure 5, which includes the experiment setup in (a) and the stable warning signal in (b). The experiment demonstrated that the system can detect fires at distances of up to 50 m. It is worth noting that the warning signal remained stable throughout the long-range detection experiment, which demonstrates the system's ability to effectively detect fires even at extended distances. The experimental results indicate that the proposed fire detection system is highly effective in detecting fires, both at short and long distances. The system's use of a UV detector with a rapid response time and the ability to cancel out background noise, coupled with the rotation of the parabolic mirror to enhance its sensitivity, enables it to accurately detect fires and provide timely warnings to prevent property damage and protect lives. The system's ability to send warning signals to a smartphone or via Wi-Fi and to be monitored in real-time from a monitoring center further enhances its capabilities and makes it suitable for use in warehouses, seaports, and factories. \begin{table}
\begin{tabular}{c c} \hline \hline Measurement target size & Short range: 5 mm \(\times\) 10 mm \\  & Long range: 300 mm \(\times\) 300 mm \\  & Short range: 1.5, 3.0, 5.0, 10.0 m \\ Testing distance & Long range: 50 m \\  & 185–280 nm \\ Detected wavelength range & 185–280 nm \\   Power supply & 12 V \\   Current supply & 2 mA \\ \hline \hline \end{tabular}
\end{table} 
Table 1: Condition of the fire detection experiment. Figure 3: Experimental fire detection system and setup used to verify its measurement range and sensitivity: (**a**,**b**) experimental system in detail; (**c**) test of the fire detection experiment using a candle. The experimental results indicate that the fire detection system is capable of accurately detecting the presence of a fire source within a maximum distance of 50 m. The system's detection capability is optimized for specific dimensions of 300 mm \(\times\) 300 mm, ensuring reliable and precise identification of fire sources within this defined area. The reliable and accurate detection of fires is critical for ensuring safety in various industries, including chemical, petroleum, and electrical power. False alarms can lead to costly disruptions, reduce efficiency, and cause unnecessary evacuations.