| 摘要 |
PURPOSE:To measure weight and width of a passing body accurately by providing a piezoelectric sensor made of piezoelectric bodies divided into the plural in the direction of the way width on a passing way of the body and obtaining a signal in proportion to the pressure from between electrodes of the piezoelectric bodies. CONSTITUTION:The piezoelectric sensor 5 is constituted of the piezoelectric bodies 6a-6f divided into six in the direction of the way width and a shared electrode 9 having the electrodes 8a-8f and the protrusions 9a-9f provided between the respective piezoelectric bodies 6a-6f and a base, and the signal in proportion to the pressure is obtained. Then, the piezoelectric sensor 5 is provided on the passing way W of the body and connected with a signal processor 11 via multiplexers 10a and 10b. When the body G moves on the passing way W and presses the protrusions 9a-9f of the piezoelectric sensor 5, the signal in proportion to the pressure is obtained from between the electrodes 8a-8f and processed with the signal processor 11 and the weight and width of the body G are measured accurately.
|
