A tire with a treads depth measuring device that includes a first electrode and a second electrode that are fixed to internal surface of the tire, and an oscillator that is electrically connected to the electrodes so that capacitance between the electrodes affects frequencies of the oscillator. Changes in frequencies of the oscillator can be used to detect and calculate changes in thickness of the tire and changes in depth of treads in the tire.

A method for obtaining the distance travelled by a tire comprises fixing a sensor, to the right of the crown with a radial position Rc, capable of generating a signal proportional to the acceleration experienced; rolling the tire at a rotation speed W, subject to a load Z; acquiring, after a time T, a first signal Sig.sup.i comprising the acceleration amplitude in the direction normal to the crown, wherein the values below a threshold N represent less than 40 percent of the length of the first signal; identifying a reference value V.sub.i.sup.reference, being the square root of the average value of the first signal Sig.sup.i; and determining the distance travelled D during the time T from the following formula: D=A*T*V.sub.i.sup.reference, where A is proportional to the square root of the rolling radius of the tire.

Described herein are systems and methods for determination of rolling resistance from a sensor or sensors in a tire or tires for application in smart cars to provide feedback to interested parties, such as Departments of Transportation or tire manufacturers.

A speed evaluation system is provided for assessing a speed of a vehicle. The speed evaluation system includes a wear measurement system, which assesses a state of a tire of the vehicle. The wear measurement system includes a casing placed on a ground surface. The speed evaluation system further includes a timing device that determines at least two instants of passage of the vehicle over two distinct or non-distinct points of passage of the casing of the wear measurement system, and a processor that calculates, as a function of the instants of passage and of dimensional data of the casing and/or dimensional data of the vehicle, a speed of passage of the vehicle over the casing. A method of implementing the speed evaluation system also is provided.

There is provided a computerized system comprising a processing unit and associated memory configured to obtain a three-dimensional dataset informative of at least part of a tread of a tire, and determine, using the three-dimensional dataset, data informative of tread depth of the tire.

A wheel assembly of a vehicle (e.g., a forklift or another material-handling vehicle) is monitored to obtain information regarding the vehicle, including information regarding the wheel assembly, which may be indicative of how the vehicle including the wheel assembly is used (e.g., a duty cycle of the vehicle and/or the wheel assembly), a state (e.g., a degree of wear) of the wheel assembly, loading and shocks on the wheel assembly, and/or a state of an environment (e.g., environmental temperature, a profile, compliance, or other condition of an underlying surface beneath the wheel assembly), and which may be, for example, conveyed to a user (e.g., an operator of the vehicle), transmitted to a remote party (e.g., a provider), and/or used to control the vehicle (e.g., a speed of the vehicle). This may improve use, maintenance, safety and/or other aspects of the vehicle, including the wheel assembly.

A method for assessing tyre tread depth and/or tyre condition by taking and analysing a camera image or images of a tyre using portable instrumentation.

A fastening system for fastening an electronic device (2) in a measurement housing (1), comprising: an electronic-device holder (10) designed to accommodate an electronic measurement device (2); and a prestressing ring (20) that is able to cooperate with said holder (10) for assembly and comprises a plurality of prestressing beams (22, 25) designed to bear on said electronic device (2) when said ring is assembled together with the holder, said electronic device (2) being inserted into said holder (10).

A method for testing the wear of tires running on a rolling road comprises the following steps: using the construction data of the vehicle and a dynamic equilibrium model, determining the relationship between the speed and the accelerations at the centre of gravity of the vehicle, and the angles and directional forces applied on a given axle; continuously recording the speed and the accelerations of a vehicle travelling on a predetermined route; and disposing the two tires belonging to a same axle on the rolling road and, depending on the recorded speed and acceleration values, the values of the angle of camber, load and longitudinal forces are applied, at all times, on each of the wheels of the axle. The values of the transverse forces undergone by each of the wheels are measured and the drift angle is varied so that the sum of the transverse forces resulting from the drifting of the tires is equal, at all times, to the transverse force applied to the centre of the axle and so that the difference in drift between the two wheels respects the variation in alignment imposed on the axle.

A tire wear measurement device, according to the present invention, detects a magnetic field of a magnetic body embedded in a tread portion of a tire and measures the degree of wear of the tire from a change in the magnetic field. The tire wear measurement device includes a first magnetic field detection portion placed at a position at which the magnetic field of the magnetic body can be detected, and a second magnetic field detection portion disposed at a position at which the intensity of the magnetic field of the magnetic body differs from the intensity at the position at which the first magnetic field detection portion is disposed.