A detection system for an agricultural header includes a belt that has at least one physical feature driven by a roller at a roller rotational speed. The detection system also includes a sensor that detects a physical feature as it passes the sensor during rotation of the belt. The detection system further includes a controller that receives a signal indicating a first pulse of a first time a physical feature passes the sensor during the rotation of the belt and a second pulse of a second time a physical feature passes the sensor during the rotation of the belt. The controller further determines a pulse frequency based on the first and second times and calculates a belt rotational speed based on the pulse frequency. The controller compares the belt rotational speed to the roller rotational speed and provides an output if the roller rotational speed exceeds a threshold.

A detection system for an agricultural header includes a belt that has at least one physical feature driven by a roller at a roller rotational speed. The detection system also includes a sensor that detects a physical feature as it passes the sensor during rotation of the belt. The detection system further includes a controller that receives a signal indicating a first pulse of a first time a physical feature passes the sensor during the rotation of the belt and a second pulse of a second time a physical feature passes the sensor during the rotation of the belt. The controller further determines a pulse frequency based on the first and second times and calculates a belt rotational speed based on the pulse frequency. The controller compares the belt rotational speed to the roller rotational speed and provides an output if the roller rotational speed exceeds a threshold.

A printing apparatus includes a printing unit that performs printing on a printing medium, a transporting belt that transports the printing medium and has an endless shape, and a belt-driving roller that causes the transporting belt to circulate and has a cylindrical shape. In the transporting belt, a magnetic scale having a magnetic pole changing at a predetermined pitch is arranged along a transport direction of the printing medium. The belt-driving roller includes an outer circumferential surface constituted of a magnet body, and is in contact with the transporting belt at the outer circumferential surface. The circumferential length of the outer circumferential surface of the belt-driving roller is an integer multiple of the pitch of the magnetic scale.

In one example, a method of controlling a printing system is described, the method comprising activating a driver to advance a conveyor belt in a plurality of sub-turns. For each of the plurality of sub-turns, a first parameter associated with movement of the conveyor belt is determined, based on data obtained from the driver. For each of the plurality of sub-turns, a second parameter associated with movement of the conveyor belt is also determined, based on data obtained from an optical sensor. A per-sub-turn slippage parameter is calculated for each of the plurality of sub-turns, based on any difference between the first parameter and the second parameter. The method further comprises calculating a slippage metric based on the per-sub-turn slippage parameters for the plurality of sub-turns, and causing outputting of a conveyor belt tension adjustment indication.

A system and a method is disclosed for monitoring tension and detecting slip of industrial belts (e.g. V, flat, and Timing belts) while in running condition on belt drives by using ultrasonic transducers. The sensing part involves two ultrasonic transducers which are installed on an assembly which is placed within a constrained space between the tension side and slack side of belt. Acoustic waves having predefined amplitude are sent from transmitting transducer on the belt and amplitude of the signal reflected from the belt is measured and compared with a threshold value to detect reduced tension. Additionally, acoustic plugs are mounted on driver and driven pulley locknuts to blank the reflected signal periodically. The time period of the blanking of signals from the pulleys is computed and it measures the rotational speed (revolutions per minute: rpm) of the pulleys. This rpm is used to calculate the rotational speeds of the pulleys. The rotational speeds of the driver and driven pulleys are compared with respect to the theoretical speeds inversely proportional to the diameters of the pulleys to detect the slip of the belt. The apparatus generates an alert to user when the belt tension is reduced and/or when slip is detected. The processing circuit involves a microcontroller with Wi-Fi module to send the alert messages to remote location such as cloud and/or to user interface devices such as computers or mobile phones.

A system and a method is disclosed for monitoring tension and detecting slip of industrial belts (e.g. V, flat, and Timing belts) while in running condition on belt drives by using ultrasonic transducers. The sensing part involves two ultrasonic transducers which are installed on an assembly which is placed within a constrained space between the tension side and slack side of belt. Acoustic waves having predefined amplitude are sent from transmitting transducer on the belt and amplitude of the signal reflected from the belt is measured and compared with a threshold value to detect reduced tension. Additionally, acoustic plugs are mounted on driver and driven pulley locknuts to blank the reflected signal periodically. The time period of the blanking of signals from the pulleys is computed and it measures the rotational speed (revolutions per minute: rpm) of the pulleys. This rpm is used to calculate the rotational speeds of the pulleys. The rotational speeds of the driver and driven pulleys are compared with respect to the theoretical speeds inversely proportional to the diameters of the pulleys to detect the slip of the belt. The apparatus generates an alert to user when the belt tension is reduced and/or when slip is detected. The processing circuit involves a microcontroller with Wi-Fi module to send the alert messages to remote location such as cloud and/or to user interface devices such as computers or mobile phones.

A method for monitoring a belt conveyor with a circulating conveyor belt includes the steps of determining at least one operating parameter of the belt conveyor; determining running resistances at different points along the conveyor belt on the basis of the at least one determined operating parameter; determining a sum of the determined running resistances over the length of the conveyor belt; and adapting the determination of the running resistances, in order to minimize a deviation of the drive power which is calculated from the determined sum from the measured drive power.

The present invention discloses an anti-stalling circuit, an anti-stalling system composed of same and an anti-stalling method. The anti-stalling circuit includes a motor main circuit and a control circuit; the anti-stalling system includes a substrate rotating synchronously with a passive end and the passive end anti-stalling circuit, the substrate is provided with a notch, the angle of the notch ranges from 150 to 170, and the proximity switch SQ1 and the proximity switch SQ2 are installed at 180 on both sides of the substrate; and the passive end anti-stalling method is applied to the passive end anti-stalling system. The present invention can greatly reduce the probability of major failures caused by the stalling of a passive end of drive equipment at a limited cost.

A system and an apparatus capable of independently driving movers are described herein. The system and apparatus includes: a track that forms a path for movers; a plurality of movers movably mounted on the track for moving along the path; and a plurality of drive elements fixedly arranged along the track. The drive elements each have a surface that is oriented to contact a driven member of the movers. The drive elements are configured to sequentially engage the driven member of a plurality of the movers to provide controlled independent motion of the movers along the track. The drive elements may be driven by rotary motors. A method of independently driving movers is also described herein.

An apparatus for monitoring alignment of a transverse member conveyor wherein the member is attached transversely at opposite end portions to two parallel endless chains and includes two position sensors affixed and located transversely adjacent to each chain and each other. One or more targets are attached to link of each chain, and at predetermined distances from the member. The position sensors inductively or magnetically sense the relative position of the target on each chain with respect to the respective position sensor adjacent the chain, and send a signal comparing the target and sensor proximity with respect to the target on each chain. This allows determination of whether the opposite end portions of the member attached to the respective chains are aligned transversely within predetermined tolerance limits. Another aspect is monitoring a single position on an endless chain. Another aspect monitors chain catenary.