The invention relates to tyre tread depth measurement, and in particular to a tyre tread depth measurement apparatus, and a method for operation thereof. A tread depth measurement apparatus 10 is provided for measuring a tread depth of a tyre 20. The apparatus 10 comprises a body 12 having a measurement device 22 for measuring the tread depth. The body 12 further includes an electronic sensor device 28 to determine an orientation of the measurement device 22 relative to a rolling surface 18 of the tyre 20 to provide the tread depth measurement substantially along a normal (40, figure 3) to the rolling surface 18. The electronic sensor device 28 may be: an inductor circuit using inductor values, eddy current losses, Q factors; magnet; capacitor circuit may have a colpitts oscillator; light level sensor circuit; at least one photomicrosensor in a circuit, measuring displacement of a pin, they may surround the measurement device 22; a strain sensor circuit to sense deformation. The circuits may sense a proximity to metal, rubber or the tyre in general. The body 12 may include lights (36, figure 2) for illumination of the tire 20.
Tyre tread depth measurement
2017-05-03
Patent
Electronic Resource
English
IPC: | G01B MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS , Messen der Länge, der Dicke oder ähnlicher linearer Abmessungen / B60C VEHICLE TYRES , Fahrzeugreifen / G01M TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES , Prüfen der statischen oder dynamischen Massenverteilung rotierender Teile von Maschinen oder Konstruktionen |