| 摘要 |
PROBLEM TO BE SOLVED: To provide a liquid detector of a simple structure for determining a liquid existence state in a container from the exterior of the container in a shorter time with satisfactory work efficiency. SOLUTION: This liquid detector 1 is used by being detachably mounted on the container 190 at a measurement execution position set on an outer surface of its side wall part 200 with the container 190 containing a liquid L taken as a measured system, and includes an ultrasonic transducer 2 for thereinto inputting an ultrasonic beam for measurement via a side wall surface of the container 190. The ultrasonic transducer 2 functions also as a reverberation detection means for detecting reverberation information from the measured system when stopping the ultrasonic beam being input into the measured system. By envelope-detecting damped reverberation vibration waveforms, its amplitude damping behavior can be obtained in a simpler and more precise fashion and whether the liquid exists or not can be determined in a more precise fashion. Further, measurement is possible on whether or not the liquid exists with this liquid detector 1 mounted at an optional position on a container side wall surface. COPYRIGHT: (C)2008,JPO&INPIT |
