發送短信 : Health monitoring of light-weight structures

 _    _     _____    __   __   __   __   ______   
| \  / ||  |  ___||  \ \\/ //  \ \\/ // |      \\ 
|  \/  ||  | ||__     \   //    \ ` //  |  --  // 
| .  . ||  | ||__     / . \\     | ||   |  --  \\ 
|_|\/|_||  |_____||  /_//\_\\    |_||   |______// 
`-`  `-`   `-----`   `-`  --`    `-`'   `------`