| 摘要 |
A tyre tread depth measurement system derives tread depth from a time-of-flight measurement of an electromagnetic signal reflected from a tyre groove / tread surface. The system comprises a small hand held unit comprising a signal head 11; laser 11a which transmits visible light, infrared or ultra-violet light; photocell 11b to detect reflected light. The signal head 11 may communicate with a smartphone app or software built into a vehicles management system, which may give directions for periodical tyre inspection and step a user through an inspection procedure. Software may determine that measurements are above or below the minimum depth, determine rate of wear and predict tyre replacement requirement. Through the smartphone app or through the vehicle management system software the signal head 11 may communicate via the internet or a cellular network with a tyre management or fleet management operation, insurance company or government enforcement agency. |
