IP Library Granted Patent US 12,405,166
Granted Patent B2
US 12,405,166 · App. 17/696,554 · Granted Sep 2, 2025

Detecting impact and heat events on products and generating a diagnosis

Inventors: Robert James Norton, Jr. (Raleigh, NC); Thorsten Stremlau (Morrisville, NC); Kevin W. Beck (Raleigh, NC)
Assignee: Lenovo (United States) Inc.
G01J5/0096B65D79/02G01J5/0265G01J5/48G01J5/60G01K11/12G09F3/0291G01J2005/0077G01L5/0052G01N31/229G01P15/036G01P15/04H05K5/0252
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Quick Facts
Patent No.
US 12,405,166
App. No.
17/696,554
Granted
Sep 2, 2025
Kind
B2
Abstract

For generating a diagnosis, a method irradiates a product surface of a product with infrared light, the product surface including a stress sensitive pigment. The method detects an activation of the stress sensitive pigment as a color change at an infrared visible activation location. The method generates a diagnosis based on the activation.

Claims (27)

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.

2. The method of claim 1 , wherein the heat corresponds to a temperature exceeding 50 degrees Celsius.

3. The method of claim 1 , wherein the impact exceeds 600 Newton seconds.

4. The method of claim 1 , the method further comprising receiving diagnostic data for the product, wherein the diagnosis is based on the irreversible activation and the diagnostic data.

5. The method of claim 1 , wherein the infrared light is generated by an infrared light source.

6. The method of claim 1 , wherein the diagnosis comprises an estimated remaining life, an estimated value, and/or a failure mechanism.

7. An apparatus comprising:

a processor executing code stored on a memory to perform:

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 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 a diagnosis based on the irreversible activation.

8. The apparatus of claim 7 , wherein the heat corresponds to a temperature exceeding 50 degrees Celsius.

9. The apparatus of claim 7 , wherein the impact exceeds 600 Newton seconds.

10. The apparatus of claim 7 , the method further comprising receiving diagnostic data for the product, wherein the diagnosis is based on the irreversible activation and the diagnostic data.

11. The apparatus of claim 7 , wherein the infrared light is generated by an infrared light source and the irreversible activation is captured by a camera.

12. The apparatus of claim 7 , wherein the diagnosis comprises an estimated remaining life, an estimated value, and/or a failure mechanism.

13. A system comprising:

an infrared light that irradiates a product surface of a product, 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;

a camera that captures a surface image of the product surface; and

a processor that detects an irreversible activation of the pigment as a color change in the surface image in response to the infrared light, wherein the activation comprises an activation center and an activation area and that generates a diagnosis based on the irreversible activation.

14. The system of claim 13 , wherein the heat corresponds to a temperature exceeding 50 degrees Celsius.

15. The system of claim 13 , wherein the impact exceeds 600 Newton seconds.

16. The system of claim 13 , the processor further receiving diagnostic data for the product, wherein the diagnosis is based on the irreversible activation and the diagnostic data.

17. The system of claim 13 , wherein the diagnosis comprises an estimated remaining life, an estimated value, and/or a failure mechanism.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded May 18, 2022
From: NORTON, ROBERT JAMES, JR.; STREMLAU, THORNSTEN; BECK, KEVIN W
To: LENOVO (UNITED STATES) INC.
Reel/Frame 059947/0376 →
Continuity (1)
Related Publication 20230296440A1 · Sep 21, 2023
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