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A device for inspecting the pressure, temperature, etc. in a tire includes a pressure sensor attached to a valve mounted on the tire rim and having an output that varies depending upon the tire internal pressure, and a resonator including a resonant coil and capacitor which resonates in the presence

A device for inspecting the pressure, temperature, etc. in a tire includes a pressure sensor attached to a valve mounted on the tire rim and having an output that varies depending upon the tire internal pressure, and a resonator including a resonant coil and capacitor which resonates in the presence of an external radiation electromagnetic wave. An oscillation coil of an oscillator which generates the external radiation electromagnetic wave projects from the main body of the inspection device. The main body encloses a signal processor which detects and processes any change in oscillation state which has taken place at the oscillator, as caused by the resonance state of the resonator, and a display to display the result of the signal processing by the signal processor.

대표청구항 ▼

In a tire inspection device for a tire adapted to be mounted on a rim of a wheel, the inspection device comprising a first element adapted to be mounted at least in part to a valve affixed to said rim, and a sensing device adapted to be moved into and away from a position adjacent said first element

In a tire inspection device for a tire adapted to be mounted on a rim of a wheel, the inspection device comprising a first element adapted to be mounted at least in part to a valve affixed to said rim, and a sensing device adapted to be moved into and away from a position adjacent said first element, the first element comprising a sensor for sensing a physical characteristic of said tire and/or said wheel, the improvement wherein: said first element comprises a resonator, said resonator comprising a first coil and a capacitor coupled to said sensor, said first coil and capacitor comprising a resonant circuit that resonates in response to external electromagnetic radiation, whereby a resonance characteristic of said resonator varies as a function of a physical characteristic of said tire and/or wheel sensed by said sensor; and said sensing device comprises a main body including a signal processor, said processor having an oscillator with a second coil mounted externally of said main body, whereby oscillations of said oscillator produce an electromagnetic wave radiating from said second coil and said resonance characteristic of said resonator affects the state of oscillation of said oscilator when said second coil is positioned adjacent said first coil, said processor further comprising means for detecting changes in the state of oscillation state of said oscillator, and a display for indicating the occurrence of said changes of state of said oscillator.