Fish Tape Assembly With Sensor-Based Torque Matching
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Solution Overview
Problem
Existing fish tape tools and drums lack an efficient mechanism to detect the type of fish tape inserted and adjust the torque level of the motor accordingly, leading to potential damage or improper operation.
Innovation Solution
A fish tape assembly that includes a sensor to detect the type of fish tape in the drum and a method to set the torque level of the motor based on the detected type, ensuring appropriate rotation of the fish tape drum.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a fixed torque level is used for all fish tape types, then the device structure is simple, but damage may occur to softer fish tape types
Solution Approach 1:
The torque level is made dynamically adjustable based on the detected fish tape type. The motor controller automatically modifies the torque output according to sensor feedback, transitioning from a static fixed-torque system to a dynamic adaptive system that prevents damage to softer fish tape types while maintaining effectiveness for harder types.
Solution Approach 2:
The torque parameter is changed based on the detected fish tape type. The system detects whether the inserted fish tape is soft or hard and accordingly adjusts the torque level delivered by the motor, allowing the same device to safely handle multiple fish tape types with different mechanical properties.
2Reliability
If torque level is adjusted for different fish tape types, then operation safety is improved, but device complexity increases due to sensor and control requirements
Solution Approach 1:
A sensor provides feedback about the fish tape type (soft or hard) to the motor controller. This feedback loop enables the system to automatically detect the inserted fish tape characteristics and adjust the torque level accordingly, improving operation safety while maintaining relatively simple device architecture.
Solution Approach 2:
The system performs self-adjustment of torque levels based on automatic detection of fish tape type. The sensor and controller work together to enable the device to service itself by selecting appropriate operating parameters without user intervention, reducing the need for manual configuration or multiple specialized devices.
3Power
If high torque is applied to all fish tape types, then dispensing power is sufficient for hard fish tape, but damage occurs to soft fish tape
Solution Approach 1:
The torque parameter is dynamically changed based on the detected fish tape type. When soft fish tape is detected, the system reduces torque to prevent damage; when hard fish tape is detected, the system increases torque to provide sufficient dispensing power, thereby adapting the power output to match the mechanical properties of the inserted fish tape.
Solution Approach 2:
The sensor detects the fish tape type in advance before the motor begins rotating the drum. This preliminary detection allows the system to pre-adjust the torque level to appropriate settings, preventing harmful effects on soft fish tape before they can occur while ensuring adequate power is available for hard fish tape types.
Data Source
AI summary
A fish tape assembly includes a fish tape tool including a housing, a chamber defined in the housing and a motor supported by the housing. The fish tape assembly also includes a fish tape drum configured to be inserted into the chamber of the housing. The fish tape drum contains a type of fish tape and includes a rotatable drum portion configured to rotate in response to receiving torque from the motor. The fish tape tool includes a sensor configured to detect the type of fish tape in the fish tape drum inserted into the chamber of the housing.