Method of inspecting articles using imaging inspection apparatus with directional cooling

• US 20080170670A1
• Filed: 08/02/2007
• Published: 07/17/2008
• Est. Priority Date: 06/01/2005
• Status: Active Grant

• Current Assignee: Surescan Corporation
• Original Assignee: Endicott Interconnect Technologies Incorporated
• Inventors: Bhatt, Ashwinkumar C., McNamara, James J., Sathe, Sanjeev, Calmidi, Varaprasad V.
• Granted Patent: US 7,510,324 B2
• Time in Patent Office: Days
• US Class Current: 378/200
• CPC Class Codes: G01N 2223/419 computed tomograph
• CPC Class Codes: G01N 23/046 using tomography, e.g. computed tomography [CT]

Abstract

A method of inspecting articles using an imaging inspection apparatus which utilizes a plurality of individual imaging devices for directing beams onto the articles having objects therein to detect the objects based on established criteria. The method involves the enhanced cooling of the heat-generating imaging devices in which a fan directs cooling fluid onto a plurality of deflectors which in turn direct said fluid onto selected ones of said imaging devices.

Claims

1. A method of inspecting articles to determine the presence of objects located within said articles, said method comprising:

providing a frame structure;

using a plurality of heat-generating imaging devices positioned on said frame structure to direct beams onto articles located substantially within said frame structure to thereby inspect said articles;

providing output signals from said plurality of heat-generating imaging devices as a result of said inspecting;

processing and analyzing said output signals from said plurality of heat-generating imaging devices to identify said objects within said articles; and

using a fan to direct cooling fluid in a substantially first direction to a plurality of fluid deflectors spacedly positioned on said frame structure relative to said heat-generating imaging devices; and

using said plurality of fluid deflectors to direct said cooling fluid over said plurality of heat-generating imaging devices to cool said heat-generating imaging devices during operation thereof, selected ones of said fluid deflectors deflecting at least some of said cooling fluid from said fan onto selected ones of said heat-generating imaging devices.

2. The method of claim 1 wherein said plurality of heat-generating imaging devices positioned on said frame direct said beams onto said articles along at least three different planes.

3. The method of claim 2 wherein said beams are directed onto said articles from vertically above said articles and from opposite sides of said articles.

4. The method of claim 1 further including using a plurality of detectors positioned on said frame for receiving said beams from said plurality of heat-generating imaging devices as said beams pass through said articles.

5. The method of claim 1 further including providing an opening within selected ones of said fluid deflectors, said cooling fluid being directed such that some of said cooling fluid passes through said openings.

6. The method of claim 5 further including positioning said fluid deflectors at different distances from said fan and providing said openings within said fluid deflectors of a size proportionately smaller as the distance from said fan increases such that said fluid deflectors nearest said fan allow a greater percentage of said cooling fluid to pass there-through than said fluid deflectors located at greater distances from said fan.

7. The method of claim 1 further including promoting fluid turbulence of said cooling fluid as said cooling fluid passes over selected ones of said fluid deflectors.

8. The method of claim 1 further including providing secondary cooling of selected ones of said fluid deflectors.

9. The method of claim 8 wherein said secondary cooling is provided by pumping cooling fluid through selected ones of cooling pipes.

10. The method of claim 1 further including conveying said articles having said objects located therein along a path of travel on a conveyor not physically coupled to said frame structure.

11. The method of claim 10 further including driving said conveyor using a single drive.