Smart wheel energy harvester

Patent metadata

Field	Value
Publication number	US-11791748-B2
Application number	US-201916681620-A
Country	US
Kind code	B2
Filing date	Nov 12, 2019
Priority date	Jul 24, 2019
Publication date	Oct 17, 2023
Grant date	Oct 17, 2023

Abstract

Systems and methods for an energy harvester proximate to a rotatable component of a vehicle's wheel are disclosed. In some embodiments, an energy harvester system includes: a substrate having a first surface configured to contact and interface with a surface of a wheel, and a second surface opposite the first surface; a piezoelectric component configured to produce energy in response to mechanical strain imparted on the piezoelectric component, wherein the piezoelectric component is configured to deform while experiencing the mechanical strain so as to contact at least a portion of the second surface.

First claim

What is claimed is:

1. An energy harvester system, comprising:
a substrate comprising:
a first surface configured to contact and interface with a surface of a wheel, and
a second surface opposite the first surface, wherein the second surface has a curved surface;

a piezoelectric component configured to produce energy in response to mechanical strain imparted on the piezoelectric component, wherein a portion of the piezoelectric component is attached to a first portion of the second surface, the second surface comprising a second portion that is configured to contact the piezoelectric component when mechanical strain is imparted on the piezoelectric component, wherein the second portion is further configured to not contact the piezoelectric component when no mechanical strain is imparted on the piezoelectric component, and wherein the piezoelectric component is configured to deform while experiencing the mechanical strain so as to contact the second portion of the second surface; and
an interconnect conductively coupled to the piezoelectric component, the interconnect being configured to conduct electrical energy from the piezoelectric component to a device coupled to the wheel.

2. The system of claim 1 , wherein the piezoelectric component comprises multiple layers.

3. The system of claim 2 , wherein the piezoelectric component comprises: a tensile load backing layer, a piezoelectric material layer, and an electrode layer.

4. The system of claim 3 , wherein the electrode layer comprises an electrode configured to connect to the interconnect.

5. The system of claim 3 , wherein the electrode is formed in a mesh configuration.

6. The system of claim 3 , wherein the electrode layer is closer to the second surface than the tensile load backing layer.

7. The system of claim 3 , wherein the electrode layer comprises an elongated electrode that traverses a two dimensional space.

8. The system of claim 1 , wherein the first surface is curved in three dimensions along a length, a width, and a height of the substrate.

9. A system, comprising:
a wheel comprising a staging surface formed therein, wherein the staging surface has a curved surface; and
a piezoelectric component configured to produce energy in response to mechanical strain, wherein the piezoelectric component is flat and fixed to a first portion of the staging surface, the staging surface comprising a second portion that is configured to contact the piezoelectric component when mechanical strain is imparted on the piezoelectric component, wherein the second portion is further configured to not contact the piezoelectric component when no mechanical strain is imparted on the piezoelectric component, and wherein the piezoelectric component is configured to deform and contact the second portion of the staging surface while experiencing the mechanical strain.

10. The system of claim 9 , wherein the wheel comprises a rim, and wherein the staging surface is part of a depression along the rim.

11. The system of claim 9 , wherein the piezoelectric component comprises a piezoelectric material layer between two electrode layers.

12. The system of claim 11 , wherein the two electrode layers comprise different mesh structures.

13. The system of claim 9 , wherein the wheel has a spherical shape.

14. The system of claim 9 , wherein the piezoelectric component comprises a piezoelectric material that is least one of: a crystal and semiconductor material or a polymer and organic material.

15. The system of claim 9 , wherein the wheel comprises an airless tire and the staging surface is along a spoke of the airless tire.

16. A method, comprising:
rotating a wheel, wherein the wheel comprises a staging surface formed in the wheel, wherein the staging surface has a curved surface;
deforming a piezoelectric component, wherein the piezoelectric component configured to produce energy in response to mechanical strain, wherein the piezoelectric component is flat and fixed to a first portion of the staging surface, and wherein the piezoelectric component is configured to deform and contact a second portion of staging surface while experiencing the mechanical strain, wherein the second portion of the staging surface is further configured to not contact the piezoelectric component when not experiencing the mechanical strain; and
powering a device located on the wheel using the energy.

17. The method of claim 16 , further comprising:
receiving, at a processor located within a vehicle body, sensor data from the device, wherein the device is configured to produce the sensor data while disposed on the wheel;
determining a parameter value based on the sensor data; and
performing an action based on the parameter value meeting a threshold value.

18. The method of claim 17 , wherein the parameter value is based on the sensor data and data received from a remote server.

19. The method of claim 17 , wherein the device is configured to send the sensor data to the processor via a wireless connection.

20. The method of claim 16 , wherein the piezoelectric component is configured to contact a surface on which the wheel is configured to rotate.

Assignees

• Tdk Corp

Inventors

• Griswold Ryan
• Sze John
• Vivek Vibhu

Classifications

• H02N2/18 Primary

  producing electrical output from mechanical input, e.g. generators (for measurement devices G01) · CPC title

• B60B27/0015

  for driven wheels · CPC title

• B60C23/0411

  Piezoelectric generators · CPC title

• B60C23/0486

  comprising additional sensors in the wheel or tyre mounted monitoring device, e.g. movement sensors, microphones or earth magnetic field sensors · CPC title

• B60C7/00

  Non-inflatable or solid tyres (B60C1/00 takes precedence) · CPC title