| 摘要 |
PURPOSE:To perform sensory inspection automatically and accurately by dividing the frequency of a sample percussion sound through a band-pass filter, and referring to filter outputs of a learning storage memory classified by conforming and nonconforming articles, and sorting conforming sample from nonconforming samples. CONSTITUTION:The percussion sound that a sample 1 generates with a percussion device 2 is collected by a microphone 3, frequency-divided by a BPF4, and stored in an inspection data register 7. The contents of this register 7 are compared by a comparator 8 with outputs of the BPF4 which is stored previously in the learning storage memory 6 and classified by conforming and nonconforming articles to decide and display whether the sample 1 is normal or not on a result display device 9. Thus, the sensory inspection of a casting, etc., by percussion is performed easily and accurately by this automatic inspection. |
