US 4,570,152 A · Magnetic tire monitor system

Abstract

A method and apparatus are described for monitoring the condition of a rotating pneumatic tire on a moving vehicle. A plurality of magnetic studs are embedded into the body of a pneumatic tire at the selected points about the periphery thereof. A magnetic field sensor is mounted upon a non-rotating portion of the vehicle adjacent to the tire and is utilized to detect the magnetic field pulsations generated by the rotating plurality of magnetic studs. As the temperature of the tire increases, toward imminent failure, or tread separation, the heat generated will decrease the magnetic field associated with the magnetic studs. When the temperature increases to a selected point and the magnetic field decreases accordingly, a display device is utilized to generate a visual and/or audible indication of imminent tire failure.

Claims23

Dependent claims

Apparatus for monitoring the condition of a pneumatic tire on a moving vehicle comprising:

a plurality of magnetic members embedded in the body of a pneumatic tire at selected points about the periphery thereof;
at least one magnetic field sensing device mounted upon a non-rotating portion of said vehicle in proximity to the periphery of said tire for generating an output signal representative of the magnetic field generated by said plurality of magnetic members;
signal processing means coupled to said at least one magnetic field sensing device for measuring decreases in said output signal indicative of an increase in temperature of said tire;
and
display means coupled to said signal processing means for generating a visual display signal in response to a selected decrease in said output signal.

2 more elements

Dependencies are inferred from the claim text.

Magnetic tire monitor system

Life of this patent

Magnetic tire monitor system

Life of this patent

Abstract

Claims23