Title:
MEASUREMENT METHOD IN AIR-TIGHTNESS INSPECTION DEVICE THAT IS FOR INSPECTING BOX BODY AND HAS SEAM MOVEMENT CONTROL DEVICE
Document Type and Number:
WIPO Patent Application WO/2004/104544
Kind Code:
A1
Abstract:
A measurement method capable of stabilizing pressure variation caused by resonance and reflection wave of air supplied, where drive of a pump of an air supply device is adjusted, starting at time at which the measurement starts, to a volume whose air tightness is to be inspected. In a measurement method using an air-tightness inspection device that is for inspecting a box body and has a steam movement control device, a differential pressure is obtained as a measurement result in a time corresponding to a measurement section where an acoustic pressure in an air supply path is low. Program operation of the air supply device and timer AND output of contact point information of a differential pressure gauge are combined so that a differential pressure is indicated as an accurate measurement result with a little error which result is measured in a specific time section and in a measurement section where acoustic pressure variation in the air supply path is low. The air supply device is operated by program control so that a pressure variation amount follows a pressure rising process of a trapezoid shape.
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Inventors:
MIZOBE KUNITAKA (JP)
Application Number:
PCT/JP2003/006558
Publication Date:
December 02, 2004
Filing Date:
May 26, 2003
Export Citation:
Assignee:
KYUSHU SANKOSHA INC (JP)
MIZOBE KUNITAKA (JP)
MIZOBE KUNITAKA (JP)
International Classes:
G01M3/32; (IPC1-7): G01M3/26
Foreign References:
| JPH04157335A | 1992-05-29 | |||
| JPS6291830A | 1987-04-27 | |||
| JPH05322060A | 1993-12-07 | |||
| JPH1164207A | 1999-03-05 | |||
| JP2002048363A | 2002-02-15 |
Attorney, Agent or Firm:
Hirata, Yoshinori (Nishizin 1-chome Sawara-k, Fukuoka-shi Fukuoka, JP)
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