Smart braking devices, systems, and methods
First Claim
1. A friction element that measures an external compression force applied to the friction element, the friction element comprising:
- a support element;
a friction material attached to and in contact with the support element;
at least one force sensor positioned between the support element and the friction material; and
a protective element positioned between the friction material and the at least one force sensor such that a top surface and side surfaces of the at least one force sensor are separated from the friction material by the protective element,wherein the friction material, the at least one force sensor and the protective element exhibit a linear elastic behavior in a direction of the external compression force (F) applied to the friction material,wherein the protective element applies a final force (Fp) to the at least one force sensor when the external compression force (F) is applied to the friction material, andwherein elastic constants of the friction material, the at least one force sensor and the protective element are selected such that (Fp/F) is not less than 0.1.
1 Assignment
0 Petitions
Accused Products
Abstract
Various braking devices, systems, and methods are disclosed. In some embodiments, the braking device includes a support element, a block of friction material supported by the support element, at least one piezoceramic sensor supported by the support element and interposed between the block of friction material (and the support element, and a protective element located at the piezoceramic sensor and embedding the latter. The protective element can have one or more layers of resin-based material applied to protect the piezoceramic sensor and direct a predetermined part of the external compression force onto an area of the support element surrounding the piezoceramic sensor. In some embodiments, a signal transduction device is provided and includes at least one piezoceramic sensor supported on a support element and has an integral protective coating having properties of mechanical and temperature resistance.
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Citations
11 Claims
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1. A friction element that measures an external compression force applied to the friction element, the friction element comprising:
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a support element; a friction material attached to and in contact with the support element; at least one force sensor positioned between the support element and the friction material; and a protective element positioned between the friction material and the at least one force sensor such that a top surface and side surfaces of the at least one force sensor are separated from the friction material by the protective element, wherein the friction material, the at least one force sensor and the protective element exhibit a linear elastic behavior in a direction of the external compression force (F) applied to the friction material, wherein the protective element applies a final force (Fp) to the at least one force sensor when the external compression force (F) is applied to the friction material, and wherein elastic constants of the friction material, the at least one force sensor and the protective element are selected such that (Fp/F) is not less than 0.1. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification