Snowgroomer Winch Drum Control via Sensor Feedback
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Solution Overview
Problem
Existing snow groomers lack adequate cable control, leading to malfunctions and jamming issues on steep slopes, which can result in safety hazards and inefficiencies during operation.
Innovation Solution
A snow groomer with a winch assembly that includes a support structure, a rotating drum, a cable, an actuator assembly, and sensors to determine the drum's position and geometry, along with a control unit that manages cable winding and unwinding, and a cable guide device to ensure precise positioning and tensioning, displayed on a user interface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a cable guide device with movable arms is used to position the cable, then the cable can be positioned with respect to the drum, but the arms may jam and produce undue movement, leading to malfunctioning
Solution Approach 1:
The patent replaces the mechanical arm-based cable guide device with an electronic control system. Sensors detect the drum position and cable state, and the control unit processes this information to actuate the cable guide device, substituting mechanical linkages with electronic sensing and control to eliminate jamming issues
Solution Approach 2:
The patent implements a feedback control system where sensors continuously monitor the drum position and cable winding state, providing real-time information to the control unit. This feedback loop enables dynamic adjustment of the cable guide device to maintain proper cable positioning without mechanical jamming
2Ease of operation
If the cable guide device is operated mechanically by the cable, then the device can move the arms, but this may result in loss of precise control over cable winding
Solution Approach 1:
The patent replaces the purely mechanical cable-driven arm operation with an electronic control system. The control unit receives input from sensors about drum position and cable state, then electronically controls the cable guide device actuator, providing precise control over cable winding that mechanical linkages cannot achieve
Solution Approach 2:
The system uses sensors to automatically detect cable winding state and drum position, eliminating the need for manual operation or complex mechanical feedback mechanisms. The control unit processes sensor data and automatically adjusts the cable guide device, making the system self-regulating and highly precise
Data Source
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AI summary
A snow groomer equipped with a winch assembly (10) to aid handling of the snow groomer on steep slopes, a user interface (7) and a control unit (13); the winch assembly (10) having a drum (15) that rotates about an axis (A1), a cable (16) wound about the drum (15), an actuator assembly (27) for rotating the drum (15), and a sensor (28) for determining the position of the drum (15) about the axis (A1); wherein the control unit comprises a memory (42) for storing the geometry of the drum (15) and is configured to control the cable as a function of the position of the drum (15) and the geometry of the drum (15); the groomer further comprising a display in the cab of the groomer for showing the winding state of the drum on the basis of the signal emitted by sensor (28) and of the geometry of the drum (15).