| 摘要 |
A liquid detection system for determining a presence of a liquid, including a piezoelectric element that outputs a first ultrasonic signal in response to an input electrical signal, and a housing with a first surface and a second surface disposed on opposite sides of a portion of the housing, a third surface disposed opposite the second surface across a gap in the housing, and a fourth surface and a fifth surface extending between the second surface and the third surface. The piezoelectric element is coupled to the first surface of the housing so that the piezoelectric element directs the first ultrasonic signal toward the second surface, and the gap in the housing is in fluid communication with a surrounding environment so that when fluid from the surrounding environment is present in the gap, the third surface of the housing reflects a second ultrasonic signal in response to the first ultrasonic signal when the liquid is present in the gap. |
