A method, a system and a computer-readable medium for detecting a wheel tread depth include a first detector, a second detector and a processor. The first detector is configured to detect a moving distance of a vehicle moved by at least one wheel. The second detector is configured to detect a number of tunes of the wheel while the vehicle moves the moving distance. The processor is electrically connected to the first detector and the second detector. The processor is configured to compute a current diameter of the wheel according to the moving distance and the number of tunes of the wheel and determine a parameter of the tread pattern of the wheel according to the current diameter of the wheel and a reference value.

A method, a system and a computer-readable medium for detecting a wheel tread depth include a first detector, a second detector and a processor. The first detector is configured to detect a moving distance of a vehicle moved by at least one wheel. The second detector is configured to detect a number of tunes of the wheel while the vehicle moves the moving distance. The processor is electrically connected to the first detector and the second detector. The processor is configured to compute a current diameter of the wheel according to the moving distance and the number of tunes of the wheel and determine a parameter of the tread pattern of the wheel according to the current diameter of the wheel and a reference value.

In a method of determining a radius or diameter of a train wheel, a camera mounted on a train acquires first and second images (pictures) of first and second objects spaced along a path being traveled by the train. Matches are then determined between the first and second objects appearing in the first and second acquired images and representations (pictures) of the first and second objects appearing in prerecorded images included in a track database that include corresponding first and second geographical locations. A distance L traveled by the train between the first and second geographical locations is determined and a sum C of electrical pulses generated by an encoder coupled to the train wheel during travel of the train the distance L is determined. Based on the distance L and the sum C, a diameter or radius of the wheel is determined.

Various embodiments include a reflectometer and a reflectometry system for monitoring movements of a substrate, such as a silicon wafer. In one embodiment, a reflectometry system monitors and controls conditions associated with a substrate disposed within a process chamber. The process chamber includes a substrate-holding device having an actuator mechanism to control movement of the substrate with respect to the substrate-holding device. The reflectometry system includes a light source configured to emit a beam of light directed at the substrate, collection optics configured to receive light reflected from the substrate by the beam of light directed at the substrate and output a signal related to one or more conditions associated with the substrate, and a processor configured to process the signal and direct the actuator mechanism to control the movement of the substrate with respect to the substrate-holding device based on the signal. Other devices and methods are disclosed.

The invention relates to a method for estimating a current wheel circumference of at least one wheel arranged on a vehicle, said method comprising the following steps: (a) determining a reference speed of the vehicle at a point in time by means of a reference apparatus, (b) detecting a wheel rotational speed of the at least one wheel at said point in time by means of a wheel rotational speed sensor, (c) estimating a single wheel-circumference value based on the determined reference speed and the detected wheel rotational speed for said point in time by means of a calculation apparatus, (d) storing at least the estimated single wheel-circumference value in a circular buffer for said point in time, (e) repeating steps (a) to (d) for at least one other point in time, estimating a current wheel circumference based on the single wheel-circumference values stored in the circular buffer by means of the calculation apparatus, outputting the estimated current wheel circumference as a wheel circumference signal. The invention further relates to an associated device.

The invention relates to a method for estimating a current wheel circumference of at least one wheel arranged on a vehicle, said method comprising the following steps: (a) determining a reference speed of the vehicle at a point in time by means of a reference apparatus, (b) detecting a wheel rotational speed of the at least one wheel at said point in time by means of a wheel rotational speed sensor, (c) estimating a single wheel-circumference value based on the determined reference speed and the detected wheel rotational speed for said point in time by means of a calculation apparatus, (d) storing at least the estimated single wheel-circumference value in a circular buffer for said point in time, (e) repeating steps (a) to (d) for at least one other point in time, estimating a current wheel circumference based on the single wheel-circumference values stored in the circular buffer by means of the calculation apparatus, outputting the estimated current wheel circumference as a wheel circumference signal. The invention further relates to an associated device.

An agricultural header for use with an agricultural harvester includes a frame, a row unit having a row unit frame, a first body and a second body. The first body is coupled to the row unit frame and includes a first post, a second post, and a third post defining a plurality of adjustment openings. The second body is pivotally coupled to the second post and selectively coupled to the third post via one of the plurality of adjustment openings. A first contact member and a second contact member are movably coupled to the second body. A sensing unit is disposed in contact with the first and second contact members. A stalk feeler is deflectably coupled to the sensing unit and is configured to being disposed within a plane. A movement of either contact member induces movement of the stalk feeler relative to the plane.

An agricultural header for use with an agricultural harvester includes a frame, a row unit having a row unit frame, a first body and a second body. The first body is coupled to the row unit frame and includes a first post, a second post, and a third post defining a plurality of adjustment openings. The second body is pivotally coupled to the second post and selectively coupled to the third post via one of the plurality of adjustment openings. A first contact member and a second contact member are movably coupled to the second body. A sensing unit is disposed in contact with the first and second contact members. A stalk feeler is deflectably coupled to the sensing unit and is configured to being disposed within a plane. A movement of either contact member induces movement of the stalk feeler relative to the plane.

Methods, apparatuses and computer program products for estimating absolute wheel roll radii and/or a vertical compression value of wheels of a vehicle are disclosed, wherein yaw rates of the vehicle, wheel speeds of first and second wheels, and optionally lateral acceleration of the vehicle are measured and used as a basis for the estimation.

Methods, apparatuses and computer program products for estimating absolute wheel roll radii and/or a vertical compression value of wheels of a vehicle are disclosed, wherein yaw rates of the vehicle, wheel speeds of first and second wheels, and optionally lateral acceleration of the vehicle are measured and used as a basis for the estimation.