## 4 Example Verification  
### Description of Collection Data Type  
To verify the effectiveness of the above methods, this paper takes the bulb tubular hydropower units, with a rated power of 30.77 MW, which was put into use in May 2015, in Guangxi Province of China as the research object. The general structure and some sensors installation positions of the hydropower unit studied are shown in Figure 2. The Monitoring System of NaRI Open-2000 installed in this power station is designed and manufactured by NARI Group Co., Ltd. (Nanjing, China). The function of the Open-2000 monitoring system is to realize the centralized monitoring and control, recording and management of the whole power station, and remote monitoring of the system. Its data acquisition system can collect real-time data from various field control units and external data links, complete the database refresh, and analyze, process and calculate the collected data to form the data needed for monitoring and management, and store these data in the database. The monitoring parameters collected by the acquisition system include electrical parameters such as current, voltage, and power, mechanical parameters such as vibration, travel, displacement, guide vane opening, water level, flow, pressure, and other hydraulic parameters, and thermal parameters such as tile temperature, oil temperature, winding temperature, etc. In this paper, 107 kinds of parameters are selected from the above monitoring parameters for analysis. Some of the original data of some monitoring parameters are shown in Table 1. It can be seen from Table 1 that the data of monitoring are discrete data, which cannot be analyzed by traditional diagnosis method based on the continuous signal. The main types of sensors used are shown in Table 2. Figure 3 shows the installation position of the RTZ bearing bush temperature sensors for collecting the temperature of water guide bearing bush, and basic dimensions parameters of turbine model are shown in Table 3.  
\begin{table}
\begin{tabular}{c c c c c c c} \hline \hline \multirow{2}{*}{**Monitoring Parameters**} & \multirow{2}{*}{**Units**} & \multicolumn{5}{c}{**Time**} \\ \cline{3-7}  & & **8:00:00** & **8:10:00** & **8:20:00** & **8:30:00** & **8:40:00** \\ \hline Temperature of No.11 forward thrust bearing bush & \({}^{\circ}\)C & 48.52 & 48.47 & 48.46 & 48.42 & 48.33 \\ Temperature of No.12 forward thrust bearing bush & \({}^{\circ}\)C & 48.59 & 48.65 & 48.55 & 8.56 & 48.51 \\ Unit speed & r/min & 78.88 & 78.88 & 79.10 & 78.88 & 78.79 \\ The swing of oil receiver in X direction & \(\mu\)m & 64.39 & 120.91 & 87.60 & 61.38 & 86.50 \\ Vibration of stator frame in the X direction & \(\mu\)m & 38.87 & 33.34 & 33.80 & 28.81 & 30.26 \\ Vibration of stator frame in the Y direction & \(\mu\)m & 40.97 & 29.42 & 14.38 & 18.21 & 32.44 \\ Vibration of combined bearing in the X direction & \(\mu\)m & 12.95 & 8.73 & 11.35 & 11.03 & 11.32 \\ Vibration of combined bearing in the Y direction & \(\mu\)m & 3.85 & 3.50 & 2.86 & 3.60 & 3.45 \\ Vibration of water guide bearing in the X direction & \(\mu\)m & 39.33 & 28.71 & 47.77 & 40.69 & 41.12 \\ Vibration of water guide bearing in the Y direction & \(\mu\)m & 20.94 & 17.49 & 14.50 & 16.18 & 19.55 \\ \hline \hline \end{tabular}
\end{table}
Table 1: Part of the original data of some of 107 measuring parameters on 9 October 2015.