A calibration system for an agricultural header includes a controller having a memory and a processor. The processor is configured to receive a first position signal indicative of a first position of a reel arm of the agricultural header, receive a first distance signal indicative of a first distance between the reel arm and a terrain feature, receive a second position signal indicative of a second position of the reel arm, receive a second distance signal indicative of a second distance between the reel arm and the terrain feature, determine a calibration curve having a plurality of offset distances of the reel arm based on the first position, the first distance, the second position, and the second distance, and select an offset distance of the plurality of offset distances based on an operational position of the reel arm and the calibration curve.

A calibration system for an agricultural header includes a controller having a memory and a processor. The processor is configured to receive a first position signal indicative of a first position of a reel arm of the agricultural header, receive a first distance signal indicative of a first distance between the reel arm and a terrain feature, receive a second position signal indicative of a second position of the reel arm, receive a second distance signal indicative of a second distance between the reel arm and the terrain feature, determine a calibration curve having a plurality of offset distances of the reel arm based on the first position, the first distance, the second position, and the second distance, and select an offset distance of the plurality of offset distances based on an operational position of the reel arm and the calibration curve.

Method and apparatus for detecting crop field parameters with a header of a harvester. The header includes a reel configured to draw crop from a crop field toward the header as the harvester moves through the crop field and at least one distance sensor mounted to the reel. Data is received from the at least one distance sensor mounted on the reel, processed, and used to detect crop field parameters.

Method and apparatus for detecting crop field parameters with a header of a harvester. The header includes a reel configured to draw crop from a crop field toward the header as the harvester moves through the crop field and at least one distance sensor mounted to the reel. Data is received from the at least one distance sensor mounted on the reel, processed, and used to detect crop field parameters.

A multi-segment sprocket assembly including a sprocket hub and a multi-segment sprocket. The multi-segment sprocket includes a first partial annular sprocket having a first end that includes a first flange, a second partial annular sprocket having a second end that includes a second flange, and at least a first fastener for releasably securing the first and second partial annular sprockets to the sprocket hub. Also disclosed is a harvester reel including a reel drive mechanism that includes a shaft, and the aforementioned multi-segment sprocket attached to the shaft. Also disclosed is a method for changing speeds of a drive mechanism of for a header of and agricultural harvester. The method includes removing the aforementioned multi-segment sprocket having a first overall diameter from a shaft of the header, and replacing the removed multi-segment sprocket with an aforementioned multi-segment sprocket having a second overall diameter that differs from the first overall diameter.

A multi-segment sprocket assembly including a sprocket hub and a multi-segment sprocket. The multi-segment sprocket includes a first partial annular sprocket having a first end that includes a first flange, a second partial annular sprocket having a second end that includes a second flange, and at least a first fastener for releasably securing the first and second partial annular sprockets to the sprocket hub. Also disclosed is a harvester reel including a reel drive mechanism that includes a shaft, and the aforementioned multi-segment sprocket attached to the shaft. Also disclosed is a method for changing speeds of a drive mechanism of for a header of and agricultural harvester. The method includes removing the aforementioned multi-segment sprocket having a first overall diameter from a shaft of the header, and replacing the removed multi-segment sprocket with an aforementioned multi-segment sprocket having a second overall diameter that differs from the first overall diameter.

An agricultural implement having a main chassis member having a support structure with support arms connected to the support structure for movement between a working position and a transport position, the support arms being provided with operating elements remote from the support structure, the support structure defining a working width between the operating elements and the main chassis member, and the support arms being adjustable in the working position between a length corresponding to minimum working width and a length greater than the minimum working width. In the transport position a distance between the operating elements and the main chassis member is less than the minimum working width. In a headland position the support arms are adjustable such that a distance between the operating elements and the main chassis member is less than the minimum working width.

An agricultural implement having a main chassis member having a support structure with support arms connected to the support structure for movement between a working position and a transport position, the support arms being provided with operating elements remote from the support structure, the support structure defining a working width between the operating elements and the main chassis member, and the support arms being adjustable in the working position between a length corresponding to minimum working width and a length greater than the minimum working width. In the transport position a distance between the operating elements and the main chassis member is less than the minimum working width. In a headland position the support arms are adjustable such that a distance between the operating elements and the main chassis member is less than the minimum working width.

A system and a method for controlling a reel of a combine harvester, wherein, the system comprises a satellite positioning receiver, a driving device, a controller and a rotating speed sensor; the rotating speed sensor collects and transmits an actual rotating speed of the reel to the controller, and the controller provides the driving device with a speed regulation signal according to the actual rotating speed and the operation running speed. The rotating speed of the reel can be automatically, accurately and quickly adjusted according to the operation running speed of the combine harvester during the operation of the combine harvester, and improve the operation efficiency and quality while ensuring the crop feed quantity.

A system and a method for controlling a reel of a combine harvester, wherein, the system comprises a satellite positioning receiver, a driving device, a controller and a rotating speed sensor; the rotating speed sensor collects and transmits an actual rotating speed of the reel to the controller, and the controller provides the driving device with a speed regulation signal according to the actual rotating speed and the operation running speed. The rotating speed of the reel can be automatically, accurately and quickly adjusted according to the operation running speed of the combine harvester during the operation of the combine harvester, and improve the operation efficiency and quality while ensuring the crop feed quantity.