Wire Cross-Section Detection via Pneumatic Grip and Vibration
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Solution Overview
Problem
Existing systems for electric vehicle charging cannot accurately determine the charge current capacity of various wire types, leading to safety and efficiency issues, as they are restrictive to only four standard cable types and fail when cable capacity resistance is incorrect.
Innovation Solution
A device that determines the cross-section of a wire using a lookup table and a vibration element that senses changes in vibration due to current flow, allowing for precise identification of current capacity and flow through the wire, even with small fluctuations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If integrated extra resistance measurement is used to identify cable capacity, then cable type identification is simplified, but the system is restrictive to only four standard cable types and cannot accommodate other cable specifications
Solution Approach 1:
The patent replaces the electrical resistance measurement system with a mechanical measurement system. A mechanical probe physically contacts the wire to measure its diameter directly, eliminating the need for resistance-based identification. This mechanical approach allows determination of wire specifications (13A, 20A, 32A, 63A, or other types) without being restricted to predefined cable types, as the actual physical dimension is measured rather than inferred from standardized resistance values
Solution Approach 2:
The patent changes the measurement parameter from electrical resistance to physical diameter. Instead of measuring integrated extra resistance which only corresponds to four standard cable types, the system directly measures the wire's physical dimension. This parameter change enables identification of any wire type based on its actual diameter, providing versatility while maintaining ease of operation through direct measurement
2Reliability
If integrated extra resistance measurement is used for safety control, then overcurrent protection is achieved, but the system fails when cable capacity resistance breaks down or incorrect values are provided
Solution Approach 1:
The patent replaces the electrical resistance measurement method with a mechanical diameter measurement method. The mechanical probe directly measures the wire's physical dimension, which is a fundamental property that cannot be falsified or broken down like electrical resistance. This provides more reliable cable capacity detection since the physical diameter directly determines current-carrying capacity, eliminating failures associated with resistance measurement breakdown or incorrect resistance values
Solution Approach 2:
The patent implements a verification mechanism where the measured wire diameter is compared against expected diameter ranges for different current ratings. This preliminary verification cushions against measurement errors or anomalous readings by cross-checking the physical dimension against known specifications, ensuring accurate cable capacity detection before allowing charging operation to proceed
3Difficulty of detecting and measuring
If mechanical expansion method is used to grip the wire, then wire measurement is enabled, but the device complexity increases due to gas pumping and vibration mechanisms
Solution Approach 1:
The patent uses pneumatic expansion where a flexible membrane is inflated with gas to create a gripping force on the wire. This pneumatic mechanism enables the measurement of wire cross-section by expanding the membrane around the wire, then using vibration elements to generate measurable signals from the gripped wire. The pneumatic system provides a simple yet effective way to achieve secure wire grip and accurate measurement without complex mechanical clamping structures
Solution Approach 2:
The patent employs vibration elements that are activated after the wire is gripped by the expanded membrane. These vibration elements generate mechanical vibrations in the gripped wire, and the resulting vibration characteristics are measured to determine wire properties. This vibration-based measurement approach enables accurate wire cross-section detection while keeping the overall device structure relatively simple, as the vibration mechanism is activated only during the measurement phase
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 determination of wire current capacity and flow, ensuring safety and efficiency by identifying correct current flow and detecting faults, making it suitable for all cable types and providing real-time charging estimates.
Implementation Method 1
the first empty space 5 is adapted to be filled with a gas for expanding the body 2 such that the body forms grip onto the wire 6
Implementation Method 2
a vibration element 10, wherein the gas is allowed to flow in the second empty space 9 when the valve 7 opens and to actuate the vibration element 10
Implementation Method 3
a vibration sensor 11 adapted to sense a first vibration from the vibration element 10 and to generate a first vibration value 12
Data Source
Figure 1
AI summary
A device (1) for determining an operating related parameter of a wire (6) comprising a body (2) defined by an external perimeter (3) and an internal perimeter (4), and having a first empty space (5) within the body (2), wherein the body (2) is made of a flexible material, wherein a wire (6) is allowable to pass through the internal perimeter (4), the first empty space (5) is adapted to be filled with a gas for expanding the body (2) such that the body forms grip onto the wire, a valve (7) adapted to be opened to allow flow of the gas out of the body (2), a gas container (8) comprising a second empty space (9) and a vibration element (10), wherein the gas is allowed to flow in the second empty space (9) when the valve (7) opens and to actuate the vibration element (10), a vibration sensor (11) adapted to sense a first vibration from the vibration element (10) and to generate a first vibration value (12), and a processor (13) further adapted to receive the first vibration value (12) and to determine a cross-section (14) of the wire (6).