| 摘要 |
<p>An ultrasonic sensor (11) and a main control unit (18a) are provided in an inspection device (10) for inspecting the presence or absence of gas or foreign matter inside a vacuum-packed product (20). The ultrasonic sensor (11) is provided with a transmission probe (11a) and a reception probe (11b), and detects the vacuum-packed product (20) by locating the vacuum-packed product (20) between the transmission probe (11a) and the reception probe (11b) and receiving ultrasonic waves transmitted by the transmission probe (11a) by the reception probe (11b). The main control unit (18a) determines, according to the transmissivity of the ultrasonic waves when the ultrasonic sensor (11) detects the vacuum-packed product (20), whether or not gas or foreign matter with an amount greater than or equal to a set value is present in the vacuum-packed product (20). Further, a moving unit (12) for moving the ultrasonic sensor (11) with respect to the vacuum-packed product (20) is provided.</p> |
