MATERIALS AND APPARATUS WITH MULTIPLE IMPACT LEVEL AND TORQUE DETECTION

摘要

The disclosure relates to materials and articles that provide an irreversible history of compression forces and torques experienced by the materials and articles. The disclosure relates more particularly to an multiple impact level detection assembly as well as related articles and methods. The multiple impact level detection assembly provides distinct impact patterns depending on the impact force and direction (for torqueing motions) received by the detection assembly. The detection assembly can be incorporated into a variety of articles and used in a variety of settings, for example to monitor personal safety in a protective garment such as a helmet. The detection assembly incorporates an impact detection medium (e.g., a plurality of microcapsules with an indicator therein), which can serve as an irreversible means for detecting impact on the assembly via a relief substrate incorporated into the assembly.

主权项

1. A multiple impact level detection assembly comprising:
(a) a first substrate having a top surface, an opposing bottom surface, and an interior substrate volume between the top surface and the bottom surface; (b) a relief substrate having a top surface, an opposing bottom surface, and an interior substrate volume between the top surface and the bottom surface, wherein:
(i) the relief substrate bottom surface opposes the first substrate top surface, and(ii) the relief substrate bottom surface comprises at least two contact regions having different separation distances from the first substrate top surface; and (c) an impact detection medium positioned at one or more of the first substrate top surface, the first substrate interior volume, the first substrate bottom surface, and the relief substrate contact regions, wherein the impact detection medium has a characteristic impact threshold for generating a detectable property associated with the impact detection medium.