NON-INTRUSIVE SENSOR FOR GAS FILL VERIFICATION OF INSULATED GLASS WINDOWS

Freedman, Andrew ; Kebabian, Paul L. ; Romano, Richard R. ; Woodroffe, James

Aerodyne Research Inc. (United States)

关键词: Windows;    Oxygen;    Gas Analysis;    Argon;    Glass;   

DOI  :  10.2172/822121
RP-ID  :  NONE
RP-ID  :  FC26-00NT40997
RP-ID  :  822121

美国|英语

来源: UNT Digital Library

【 摘 要 】

A sensor capable of measuring the amount of oxygen (an unwanted component that is only present because of improper filling or seal failure) within an argon-filled insulated glass window has been designed, built and successfully tested. It operates by using the optical absorption of oxygen in the atmospheric A-band centered at 762 nm. Light emitted by an argon-filled surface glow discharge lamp is Zeeman-tuned on and off an oxygen absorption line using an AC-modulated electromagnet. In the presence of oxygen, the change in the measured intensity of the lamp, obtained using standard demodulation techniques, is proportional to the oxygen column density. Measurements using an industry-standard insulated glass window indicate that the sensor can measure the amount of oxygen in a nominally argon-filled IG window (with a window gap of 10 mm) with a precision of 0.50% oxygen using a 16 second integration time. This level of precision is well within the limits required by the IG window manufacturing industry for proper monitoring of newly manufactured window units.