Motorized Paddling Simulator Cable Tension Control
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Solution Overview
Problem
Conventional rowing machines lack the ability to provide a realistic paddling experience and offer limited dynamic and interactive workout options, as they rely on fixed resistance mechanisms that do not simulate the varying resistance encountered in actual paddling.
Innovation Solution
A paddling simulator that includes a bar, a cable attached to the bar, and a motor system with a controller to dynamically adjust the tension in the cable during different phases of a paddling stroke, mimicking the resistance of paddling through water and allowing for various types of paddling exercises.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional rowing machines use fixed resistance mechanisms (fans or springs), then the device structure is simple, but the ability to provide realistic paddling experience and dynamic workout options is limited
Solution Approach 1:
The patent applies dynamics by replacing fixed resistance mechanisms with a motorized system that dynamically adjusts cable tension based on the paddling stroke phase. The motor controller varies resistance in real-time to simulate water resistance during the power phase and provide assistance during the recovery phase, transforming a static resistance system into an adaptive one that responds to user motion.
Solution Approach 2:
The invention implements parameter changes by modifying the resistance force parameter throughout the exercise cycle. The motor controller changes the tension parameter in the cable based on detected stroke phase, transitioning from high resistance during power generation to lower or negative resistance during recovery, thereby creating variable resistance patterns that enable diverse workout programs.
2Adaptability or versatility
If conventional rowing machines use fixed spring force for cable retraction, then the mechanism is simple, but the ability to provide dynamic resistance adjustment during exercise is limited
Solution Approach 1:
The patent replaces the purely mechanical spring-based cable retraction system with an electromechanical system. The motor, controlled by a controller that detects exercise phase, substitutes for the passive spring mechanism, enabling active control of cable tension rather than relying solely on elastic recovery forces.
Solution Approach 2:
The system implements self-service by using the user's own motion to trigger appropriate resistance patterns. The controller detects the exercise phase through motion sensors and automatically adjusts motor output to provide appropriate resistance or assistance, eliminating the need for manual resistance adjustments by the user.
3Reliability
If conventional rowing machines operate with fixed resistance, then the operation is simple, but the realism of simulating actual paddling resistance is poor
Solution Approach 1:
The patent implements feedback by using sensors to detect the user's paddling motion and stroke phase, then using this information to dynamically adjust motor resistance. This closed-loop control system continuously monitors exercise parameters and modifies resistance in real-time to accurately simulate water resistance characteristics, enhancing realism while maintaining ease of operation.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The paddling simulator provides a more realistic and dynamic paddling experience by varying resistance based on the phase of the stroke and the simulated position of the paddle in relation to virtual water, enabling a wider range of workout options compared to conventional rowing machines.
Implementation Method 1
a motor operationally coupled to the cable such that the motor can apply a force to the cable
Data Source
AI summary
A paddling simulator includes a bar, a cable attached to the bar, a motor operationally coupled to the cable such that the motor can apply a force to the cable, and a controller configured to control the motor to generate a first tension in the cable during a propulsion phase of a paddling stroke and a second tension in the cable during a recovery phase of the paddling stroke.