Motorized Cable Counterbalance for Dynamic Tool Weight Support
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Solution Overview
Problem
Using heavy power tools for extended periods is strenuous and can lead to physical limitations and health issues due to the inability of existing passive assistance systems to effectively counterbalance the weight force, especially in dynamic applications.
Innovation Solution
A method and system that counterbalances the weight force of an object fastened to a traction cable by determining the rotational speed of a motor, setting a current setpoint value, and regulating the motor current to counterbalance the weight force, allowing for both static and dynamic support.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If passive assistance systems are used to support heavy power tools, then the user is provided with basic support, but the system cannot provide sufficient support in dynamic applications and for extended periods
Solution Approach 1:
The system transitions from a static passive assistance system to a dynamic active system that continuously adapts to changing load conditions. The control unit receives signals from acceleration sensors and adjusts the motor's current setpoint value in real-time, enabling the system to respond dynamically to varying operational demands and provide reliable support throughout the entire working period.
2Productivity
If heavy power tools are used for extended periods, then work can be completed, but the user experiences physical strain and health issues
Solution Approach 1:
The system incorporates acceleration sensors that continuously monitor the dynamic behavior of the power tool and feed this information back to the control unit. Based on this feedback, the control unit adjusts the motor current to counterbalance the weight force, thereby eliminating physical strain on the user and enabling prolonged productive work without health risks.
3Adaptability or versatility
If the motor current is continuously regulated to counterbalance weight force, then dynamic support is achieved, but the system complexity increases
Solution Approach 1:
The system automatically determines the current setpoint value based on acceleration sensor signals and regulatory variables without requiring manual intervention. The control unit self-adjusts the motor current to counterbalance the weight force, achieving adaptability while keeping the operational complexity low through automated self-regulation.
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 system significantly reduces the force required to operate heavy power tools, enabling prolonged use without physical strain and providing effective protection against adverse health effects by effectively counterbalancing the weight force, allowing users to work with minimal resistance.
Implementation Method 1
counterbalancing the weight force of the object using the previously determined current setpoint value
Data Source
AI summary
Methods for counterbalancing a weight force of an object fastenable to a traction cable. A system is configured to carry out a counterbalancing operation with respect to the weight force of the object. This counterbalancing operation can be performed in that a rotational speed of the motor and/or a derivation of the rotational speed of the motor is determined, wherein a current setpoint value can be stored as a controlled variable in the system. The rotational speed of the motor or a derivation thereof corresponds to a weight force of the object. Alternatively, a current value required for maintaining the first position of the object or a motor torque required for this purpose can be stored in the system and the weight force of the object can be counterbalanced using the previously stored current values or torques. In further aspects, the invention relates to a system and to an electronic module.