Flexible Current Measuring Resistor for Terminal Movement
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Solution Overview
Problem
Conventional current-sensing resistors are rigid, preventing relative movement of connection points due to thermal expansion or vibration, which affects current measurement accuracy.
Innovation Solution
A current measuring resistor with flexible deformation elements allowing non-destructive deformation, enabling changes in distance and angle between terminals, and using the four-wire technique for current measurement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional rigid current-sensing resistors are used, then structural stability is maintained, but measurement accuracy deteriorates when connection points move due to thermal expansion or vibration
Solution Approach 1:
The patent applies the dynamics principle by replacing the rigid resistance element with a flexible one that can dynamically adapt its shape. The flexible resistance element can bend and deform to accommodate changes in distance and angle between connection points caused by thermal expansion or vibration, while maintaining continuous electrical contact and measurement accuracy.
Solution Approach 2:
The patent utilizes parameter changes by allowing the physical parameters of the resistance element (shape, position) to change in response to environmental conditions. The flexible resistance element changes its geometric parameters to follow the movement of connection points, ensuring that the measurement path remains intact despite dimensional changes in the overall structure.
2Adaptability or versatility
If flexible deformation elements are added to allow terminal movement, then adaptability improves, but device complexity increases
Solution Approach 1:
The patent applies the merging principle by combining the resistance function and the flexible deformation function into a single integrated element. The flexible resistance element simultaneously serves as both the measurement component and the adaptive mechanism, eliminating the need for separate flexible connectors or adjustment mechanisms and thereby reducing overall device complexity.
Solution Approach 2:
The flexible resistance element exhibits multi-functionality by serving multiple purposes: it provides electrical resistance for current measurement, accommodates thermal expansion, absorbs vibration, and maintains electrical contact despite positional changes. This universal design eliminates the need for multiple specialized components.
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
Enables accurate current measurement despite changes in distance or angle between terminals, improving measurement accuracy and flexibility under thermal expansion or vibration.
Implementation Method 1
The flexible resistance element (4) is designed to be flexibly deformable, in particular elastically or plastically deformable
Implementation Method 2
The flexible resistance element (4) is designed to be flexibly deformable, in particular elastically or plastically deformable
Implementation Method 3
The electrical current to be measured is passed through the low-ohm current measuring resistor, and the voltage drop across the current measuring resistor is measured. According to Ohm's law, the measured voltage drop is then a measure of the electrical current flowing through the low-ohm current measuring resistor.
Implementation Method 4
According to Ohm's law, the measured voltage drop is then a measure of the electrical current flowing through the low-ohm current measuring resistor.
Data Source
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Figure 3~4
Figure 5
AI summary
The invention relates to a current measuring resistor (1) for measuring an electric current, said resistor comprising: a first connection part (2) for conducting the current to be measured into the current measuring resistor (1); a second connection part (3) for conducting the current to be measured out of the current measuring resistor (1); and a resistance element (4) made of a resistive material, the resistance element (4) being located between the two connection parts (2, 3) in the current flow direction so that the electric current to be measured flows through the resistance element (4) during a current measurement. The invention provides a flexible deformation element (4) for making it possible to deform the current measuring resistor (1) in a non-destructive and reversible manner, in particular for compensating for a change in distance or a change in alignment between the connection parts (2, 3) of the current measuring resistor (1), the deformation element (4) being located between the two connection parts (2, 3) in the current flow direction so that the electric current to be measured flows through the deformation element (4) during the current measurement.