| 摘要 |
PURPOSE:To judge the adequacy of the volume of a container accurately, by resonating the container at the resonance frequency of the container, and computing the volume of the container based on the detected signal of the resonance. CONSTITUTION:When a vibrator 2 is swept in a specified frequency range, a container 3 is resonated at the resonance frequency of the container 3. The resonance is detected by a sensor 8. Based on the detected signal, the resonance frequency is obtained by a signal processor 10. The volume of the container 3 is computed based on the obtained resonance frequency in a microcomputer 11. The adequacy of the volume as to whether the volume is within an examination reference value or not is judged. In this method, remaining of water in the container and the contamination of the inside due to use of water in the conventional method can be prevented. Thus the adequacy of the volume of the container can be automatically judged accurately. |
