## 4 Results
### Wireless Connection Success Ratio Evaluation  
A wireless Bluetooth connection success ratio evaluation was conducted to measure the seamless transmission of the proposed solution in a real-time usage scenario. The test scheme shown in Figure 9 was conducted under the conditions specified in Section 4.1. The test cycle was repeated \(10\) times (n = 10).  
First, s-Guard was set to a default state (Step\({}_{0}\)). It was switched from off to on (Step\({}_{1}\)), which was the start of the first cycle. When pairing is complete, confirm the fixed connection statement \"Now connected to the BLE Server\" from the screen shown on the test computer (Step\({}_{2}\)). Then, the tilt s-Guard is used to check the sensing connection (Step\({}_{3}\)) and then check the screen that shows the six-axis values from the test computer again (Step\({}_{4}\)). Here, six-axis values refer to combinations of values (2 \(\times\) 3) calculated from the accelerometer (two-dimensional data) multiplied with gyroscope (x, y, z three-dimensional data). Finally, the s-Guard (Step\({}_{5}\)) completes one cycle, and the next cycle begins. When the final Step\({}_{5}\) is completed, complete C\({}_{n}\) and start another cycle. The final results indicated a success rate of 100%, as shown in Table 4.  
Accordingly, actual physiological signals of six-axis sensors (accelerometer and gyroscope) are shown in Figure 10. Figure 10a,b shows the accelerometer raw data and gyroscope data acquired by time. Each of the three colors of red, yellow, and blue in Figure 10a indicate x\({}_{1}\), y\({}_{2}\), and z\({}_{2}\) three-dimensional axes, respectively. On the other hand, each of the two colors of yellow and blue indicate x\({}_{2}\) and y\({}_{2}\) two-dimensional axes, respectively. Figure 10c shows the temperature data acquired by s-Guard. The blue line indicates raw data, the red line indicates linear average, and the green line indicates temperature  
\begin{table}
\begin{tabular}{c c c c c c c} \hline \hline \multirow{2}{*}{\
\begin{tabular}{c} **Test** \\ **Cycle** \\ \end{tabular} } & \multicolumn{4}{c}{**Six-Axis Value (Accelerometer and Gyroscope)**} & \multicolumn{2}{c}{
\begin{tabular}{c} **Connection** \\ **Statement** \\ **Confirmed** \\ **Positive** \\ \end{tabular} } \\ \hline C\({}_{1}\) & \(-96\) & \(152.4\) & \(914.7\) & \(-31,640.0\) & \(-1680.0\) & \(-12,670.0\) & O \\ C\({}_{2}\) & \(-194.3\) & \(141.2\) & \(913.2\) & \(2380.0\) & \(-210.0\) & 0.0 & O \\ C\({}_{3}\) & \(-184.3\) & \(149.9\) & \(980.3\) & \(2240.0\) & \(840.0\) & \(-280.0\) & O \\ C\({}_{4}\) & \(-194.9\) & \(114.6\) & \(982.2\) & \(2100.0\) & \(700.0\) & \(-1540.0\) & O \\ C\({}_{5}\) & \(-197.2\) & \(125.7\) & \(977.4\) & \(2170.0\) & \(210.0\) & \(3920.0\) & O \\ C\({}_{6}\) & \(-235.0\) & \(126.8\) & \(968.4\) & \(2800.0\) & \(-420.0\) & \(1470.0\) & O \\ C\({}_{7}\) & \(-218.2\) & \(144.8\) & \(971.0\) & \(350.0\) & \(-420.0\) & \(1470.0\) & O \\ C\({}_{8}\) & \(-307.4\) & \(247.1\) & \(926.6\) & \(2660.0\) & \(1540.0\) & \(-630.0\) & O \\ C\({}_{9}\) & \(-286.9\) & \(224.1\) & \(938.9\) & \(-2100.0\) & \(-280.0\) & \(3500.0\) & O \\ C\({}_{10}\) & \(-246.3\) & \(233.8\) & \(880.7\) & \(2170.0\) & \(-2170.0\) & \(420.0\) & O \\ \multicolumn{7}{c}{Total Success Rate} \\  & & & & & 100\% \\ \hline \hline \end{tabular}
\end{table}
Table 4: Connection success check test results.  
Figure 9: Connection success check test scenario cycle.  
critical level threshold. Lastly, Figure 10d shows raw data acquired from the SpO\({}_{2}\) sensor from s-Guard. The green, red, and blue lines refer to SpO\({}_{2}\) raw data, heart rate, and infrared raw data, respectively.