Tire deformation sensor and tire inflation system

• US 9,579,936 B2
• Filed: 11/05/2013
• Issued: 02/28/2017
• Est. Priority Date: 11/06/2012
• Status: Active Grant

• Current Assignee: Texas Research International Incorporated
• Original Assignee: Texas Research International Incorporated
• Inventors: Brushaber, Robert Philip
• Primary Examiner(s): Alharbi, Adam
• Application Number:
  US14/438,877
• Publication Number:
  US 20150251502A1
• Time in Patent Office: 1,211 Days
• Field of Search: None
• US Class Current: 1/1
• CPC Class Codes: B60C 23/002 by monitoring conditions other than tyre pressure or deformation
• CPC Class Codes: B60C 23/004 the control being done on the wheel, e.g. using a wheel-mounted reservoir
• CPC Class Codes: B60C 23/066 by monitoring wheel-centre to ground distance
• CPC Class Codes: B60C 23/10 Arrangement of tyre-inflating pumps mounted on vehicles
• CPC Class Codes: G01N 27/72 by investigating magnetic variables

Abstract

A tire deformation sensing and tire inflation system for a steel belted tires which makes use of magnetic coils embedded in the wheel assembly to detect the position of the tire'"'"'s steel belting and uses the information obtained to adjust the tire pressure through a central tire inflation system.

Claims

1. A tire deformation sensing and tire inflation system for a steel belted tire comprising:

a. At least one magnetic sensing coil embedded in the wheel assembly, wherein the at least one magnetic sensing coil embedded in the wheel assembly comprises a three coil system with two receiver coils positioned on opposite sides of a transmitter coil;

b. a counterweight embedded in the wheel assembly on the opposite side from said magnetic coils;

c. a power source for said magnetic coils;

d. a central tire inflation system deployed in the tire;

e. a data acquisition system to collect voltage signals from said magnetic sensing coils;

f. software code to analyze collected data from data acquisition system;

g. a central tire inflation system to adjust tire pressure based on instructions from said software code.

2. The tire deformation sensing and tire inflation system for a steel belted tire of claim 1 wherein the at least one magnetic sensing coil embedded in the wheel assembly comprises a single coil of wire that is part of a tuned oscillator.

3. The tire deformation sensing and tire inflation system for a steel belted tire of claim 1 wherein the power source for the system is supplied through a power harvesting system using the kinetic energy from the movement of the wheel.

4. The tire deformation sensing and tire inflation system for a steel belted tire of claim 3 wherein the power harvesting system using the kinetic energy from the movement of the wheel utilizes Piezo-transformers and/or embedded magnets to harvest the power.

5. The tire deformation sensing and tire inflation system for a steel belted tire of claim 1 wherein the power source for the system is supplied via a slip ring.

6. A method for sensing tire deformation and inflating a tire comprising the steps of:

a. measuring an induced voltage signal from at least one magnetic sensing coil embedded in the wheel assembly of the tire as the tire is turning, wherein the at least one magnetic sensing coil embedded in the wheel assembly comprises a three coil system with two receiver coils positioned on opposite sides of a transmitter coil,

b. acquiring the induced voltage signal with a data acquisition system;

c. transmitting the acquired induced voltage signal to software code that analyzes the information and sends instructions to a central tire inflation system; and

d. inflating or deflating the tire based on the instructions of the software code.

7. The method of sensing tire deformation and inflating a tire of claim 6 wherein the at least one magnetic sensing coil embedded in the wheel assembly comprises a single coil of wire that is part of a tuned oscillator.

8. The method of sensing tire deformation and inflating a tire of claim 6 wherein the power source for the system is supplied through a power harvesting system using the kinetic energy from the movement of the wheel.

9. The method of sensing tire deformation and inflating a tire of claim 6 wherein the power harvesting system using the kinetic energy from the movement of the wheel utilizes Piezo-transformers and/or embedded magnets to harvest the power.

10. The method of sensing tire deformation and inflating a tire of claim 6 wherein the power source for the system is supplied via a slip ring.