Description

EarthScan uses a pair of precision spinning sound mirrors and static conical reflectors to pass ultrasound through the structure of the tyre at high speed the tyre being rotated slowly. Where there is a change of density due to belt separations, impact damage build problems, porosity and incomplete curing, the sound passing through the structure is attenuated, and this is this is displayed live on the computer monitor, the shapes of the features say what the defects are.

The tyre is partially immersed in water so that the inside is flooded, the water couples the sound from the transmit probe through the tyre to the receive probe. The frequency of the ultrasound is 500KHz. As the pulses of sound are transmitted at a very high rate, and attenuated after passing through the tyre, specialised electronics is then required to amplify and process the data.

The image can be printed or saved as a JPG or PCX
file for archiving or transmission to the customer.