Pressure generating device and detecting system including the same

A pressure generating device, comprising:

• a tank defining a chamber therein, and including an opening and a communication port each of which is in fluid communication with said chamber;
• a deformable membrane which is disposed to seal said opening, and which is deformable between a flat state and a deformed state;
• a driving device disposed on an outer surface of said tank;
• and an actuating arm coupled to be driven by said driving device to move between a first position, where said deformable membrane is in the flat state, and a second position, where said deformable membrane is forced to be in the deformed state, such that a predetermined pressure is generated through said communication port when said actuating arm is driven from one of the first and second positions to the other one of the first and second positions;
• wherein said tank includes an end portion in which said opening is formed;
• said driving device is a motor including a motor body which is mounted on said outer surface of said tank, and an output shaft which is driven by said motor body to rotate about a rotational axis, said output shaft being rotatably retained on said outer surface of said tank, and being formed with an outer threaded surface;
• said pressure generating device further comprises a slider which is retained slidably on said outer surface of said tank along the rotational axis, and which is formed with an inner threaded surface configured to be in threaded engagement with said outer threaded surface of said output shaft so as to permit said slider to be driven by said output shaft to slide along the rotational axis between a distal position, where said slider is distal from said motor body, and a proximate position, where said slider is proximate to said motor body;
• and wherein said actuating arm is coupled to move with said slider, and includes a first horizontal portion extending from said slider over said end portion of said tank to terminate at an outer end, a vertical portion extending downwardly from said outer end of said first horizontal portion to terminate at a lower end, and a second horizontal portion coupled with said lower end of said vertical portion and extending toward said deformable membrane to terminate at an inner end such that when said actuating arm is driven to move with said slider from the first position to the second position, said inner end is moved to force said deformable membrane to deform from the flat state to the deformed state.