| 摘要 |
<p>A width measurement device (10) is provided with a conveying device (11), an ultrasonic sensor (15), a control device (20), and a burst signal generator (25). The ultrasonic sensor (15) comprises a transmission probe (15a) for transmitting ultrasound in response to a drive signal from the burst signal generator (25) and a reception probe (15b) for receiving ultrasound transmitted from the transmission probe (15a). On the basis of variation in the ultrasound intensity when the ultrasonic sensor (15) detects a packaging container (30), a CPU (21) detects the distance that the packaging container (30) is moved by the conveying device (11) between the point when one end of a part under measurement of the packaging container (30) passes between the transmission probe (15a) and reception probe (15b) until the point when the other end of the part under measurement passes between the transmission probe (15a) and reception probe (15b), and the CPU (21) detects the width of the part under measurement on the basis of the detected movement distance.</p> |
