Strain Sensor Attachment via Direct Magnetic Force
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Solution Overview
Problem
Existing strain sensor attachment constructions for injection molding machines are complex and have a high number of components due to indirect magnet attraction forces and the need for additional springs to press the sensor against the strain measured member.
Innovation Solution
A simplified configuration using a permanent magnet to directly attract a strain sensor to the tie bar, eliminating the need for springs and reducing the number of components by integrating the magnet with a metal plate and a bracket that surrounds the tie bar, ensuring a direct and sufficient attraction force for strain measurement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If a spring and carrier mechanism is used to press the strain sensor against the strain measured member, then the sensor can be pressed with sufficient force, but the construction becomes complicated and the number of components increases
Solution Approach 1:
The patent extracts and eliminates the spring and carrier components from the traditional magnet-sensor assembly. By directly attaching the strain sensor to the magnet, the design removes unnecessary intermediate elements while maintaining sufficient pressing force through the direct magnetic attraction between the magnet and the strain measured member.
Solution Approach 2:
The patent merges the strain sensor and magnet into a single integrated assembly. This combination eliminates the need for separate carrier and spring components, reducing the overall number of parts while ensuring that the magnetic force is directly transmitted to press the sensor against the strain measured member.
2Force
If a spring mechanism is used to transmit the magnet's attraction force to the strain sensor, then the sensor can be pressed against the measured member, but the number of components increases
Solution Approach 1:
The patent removes the spring component from the system by directly coupling the strain sensor to the magnet. This extraction eliminates one entire component while the magnetic attraction force acts directly on the sensor assembly, maintaining effective pressing force without the intermediate spring element.
Solution Approach 2:
The strain sensor and magnet are merged into a single functional unit. This integration reduces the component count by eliminating the need for separate spring and carrier elements, while the magnetic force is directly transmitted through this unified assembly to press the sensor against the strain measured member.
3Force
If multiple components including springs and carriers are used, then the strain sensor can be pressed with restoring force, but the installation becomes more difficult
Solution Approach 1:
The patent extracts the spring and carrier components from the assembly, leaving only the essential magnet-sensor unit. This simplification makes installation more straightforward by reducing the number of parts that need to be assembled and positioned, while the direct magnetic attraction provides the necessary pressing force without requiring complex spring mechanisms.
Solution Approach 2:
By merging the strain sensor and magnet into a single integrated unit, the patent eliminates the need for separate assembly steps involving springs and carriers. This unified structure is easier to install as a single component, while the magnetic attraction force automatically provides the necessary pressing action against the strain measured member.
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
This solution simplifies the installation and operation of strain sensors in injection molding machines by reducing the number of components and directly applying the necessary pressing force, enhancing measurement accuracy and reliability.
Implementation Method 1
a magnet, which is provided such that it is attracted to a strain measured member with a magnetic force
Data Source
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AI summary
According to one aspect of the invention, a strain sensor (553) attachment construction for a strain sensor (553) is provided in which the strain sensor (553)is attached to a strain measured member which is a component of an injection molding machine and whose strain is to be measured. The strain sensor (553) attachment construction includes a magnet (554) provided such that it is attracted to the strain measured member with a magnetic force. The strain sensor (553) is provided between a surface of the strain measured member and the magnet (554).