US 12,405,166 B2
Detecting impact and heat events on products and generating a diagnosis
Robert James Norton, Jr., Raleigh, NC (US); Thorsten Stremlau, Morrisville, NC (US); and Kevin W. Beck, Raleigh, NC (US)
Assigned to Lenovo (United States) Inc., Morrisville, NC (US)
Filed by Lenovo (United States) Inc., Morrisville, NC (US)
Filed on Mar. 16, 2022, as Appl. No. 17/696,554.
Prior Publication US 2023/0296440 A1, Sep. 21, 2023
Int. Cl. G01J 5/60 (2006.01); B65D 79/02 (2006.01); G01J 5/00 (2022.01); G01J 5/02 (2022.01); G01J 5/48 (2022.01); G01K 11/12 (2021.01); G01P 15/04 (2006.01); G09F 3/00 (2006.01); G09F 3/02 (2006.01); G01L 5/00 (2006.01); G01N 31/22 (2006.01); G01P 15/03 (2006.01); H05K 5/02 (2006.01)
CPC G01J 5/0096 (2013.01) [B65D 79/02 (2013.01); G01J 5/0265 (2013.01); G01J 5/48 (2013.01); G01J 5/60 (2013.01); G01K 11/12 (2013.01); G09F 3/0291 (2013.01); G01J 2005/0077 (2013.01); G01L 5/0052 (2013.01); G01N 31/229 (2013.01); G01P 15/036 (2013.01); G01P 15/04 (2013.01); H05K 5/0252 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A method comprising:
irradiating a product surface of a product with infrared light, the product surface comprising a plurality of stress sensitive hollow, opaque capsules that each enclose a pigment sensitive to infrared light and that are each configured to rupture in response to heat and/or an impact;
detecting, using a camera, an irreversible activation of the pigment as a color change in response to the infrared light, wherein the activation comprises an activation center and an activation area; and
generating, using a processor, a diagnosis based on the irreversible activation.