Wireless Motor Drive Monitoring for Handheld Knife Safety Shutdown
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing powered rotary knives in the meat processing industry are hazardous to operate due to rudimentary drive controls and prone to premature failure from design flaws, leading to unsafe conditions and unnecessary wear.
Innovation Solution
A power pack system with a motor controller and relay circuit that monitors operation using computer-executable instructions to disconnect the electric motor from the power supply when deviations are detected, ensuring safe and controlled operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If rudimentary drive control is used in powered rotary knives, then device complexity is reduced, but safety and operational reliability deteriorate
Solution Approach 1:
The motor controller continuously monitors motor operation parameters and compares them against expected ranges, automatically adjusting control or triggering safety responses when deviations are detected, thereby maintaining safety without requiring complex manual control systems
Solution Approach 2:
The system performs self-diagnosis by monitoring its own operational parameters and automatically taking corrective action through the relay circuit when safety thresholds are exceeded, eliminating the need for complex external safety control mechanisms
2Ease of manufacture
If design flaws are present in powered rotary knives, then manufacturing simplicity is maintained, but durability and operational lifespan deteriorate
Solution Approach 1:
The monitoring system detects potential failure conditions before they result in actual damage, allowing preventive shutdown or adjustment that extends component life without requiring redesigned components
Solution Approach 2:
The patent employs a simple relay circuit and basic monitoring logic that can be manufactured at low cost, replacing complex protective mechanisms while still achieving extended operational lifespan through intelligent control
3Reliability
If intelligent monitoring is implemented in power packs, then safety and reliability are improved, but device complexity increases
Solution Approach 1:
The patent replaces complex mechanical safety interlocks and physical guard mechanisms with electronic monitoring and software-based control logic, reducing mechanical complexity while maintaining or improving safety
Solution Approach 2:
The motor controller performs multiple functions including motor control, parameter monitoring, safety determination, and relay actuation within a single integrated device, avoiding the need for separate safety control systems
4Reliability
If continuous monitoring is performed on motor operation, then premature failure is prevented, but energy consumption increases
Solution Approach 1:
The monitoring system operates continuously during motor runtime to detect developing failures, extending component life through early detection without requiring intermittent shutdowns or additional energy-intensive inspection procedures
Solution Approach 2:
The system monitors only critical parameters necessary for safety and failure prevention rather than all possible operational parameters, achieving reliable failure prevention with minimal additional energy consumption
Data Source
AI summary
A power pack for a power tool. The power pack includes an electric motor configured for driving engagement with the power tool. The power pack also includes a motor controller having a relay circuit connected to a electric motor. The relay circuit includes a switch selectively connected to a power supply. The power supply powers the electric motor. The motor controller also includes non-transitory computer-readable storage media having computer-executable instructions for monitoring operation of the stored power pack. When executed by at least one processor, the computer-executable instructions cause the at least one processor to: monitor input data relating to operation of the power pack; determine, based on the input data, that operation of the power pack deviated from an ideal state; and, based on the determination of deviation, cause the switch to electrically disconnect the electric motor from the power supply.