Proximity Current Sensor with Adjustable Wire Positioning
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Solution Overview
Problem
Existing proximity electric current sensors face significant measurement errors due to installation position issues, making them inconvenient for practical applications.
Innovation Solution
A proximity electric current sensing device with adjustable components and sensing units that allow precise calibration of a conducting wire's position, utilizing magnetic flux sensing to accurately determine the wire's position and electric current, thereby reducing measurement errors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Difficulty of detecting and measuring
If magnetic field sensing is used for proximity measurement, then measurement capability is improved, but measurement precision deteriorates due to position errors
Solution Approach 1:
The patent employs feedback by using first and second sensing units to detect the conducting wire's position and providing this position information back to the system. Based on this feedback, the conducting wire's position is adjusted to achieve precise alignment with the third sensing unit, thereby eliminating measurement errors while preserving the magnetic field sensing capability.
Solution Approach 2:
The patent applies preliminary action by adjusting the conducting wire's position before the actual current measurement is performed. The position adjustment mechanism ensures the wire is correctly aligned with the sensing unit in advance, so that when measurement occurs, no position-related errors are present.
2Device complexity
If conductor position is not precisely adjustable, then device complexity is reduced, but measurement precision deteriorates
Solution Approach 1:
The patent segments the sensing system into multiple independent sensing units (first, second, and third sensing units) with distinct functions. The first two units detect position while the third performs measurement, allowing precise position control without overly complicating the overall device structure.
Solution Approach 2:
The patent introduces an intermediary position detection mechanism using the first and second sensing units. These units act as mediators that provide position information to enable accurate alignment of the conducting wire with the third sensing unit, achieving precise measurement without direct complex adjustment mechanisms.
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
The device enables precise measurement of electric current by ensuring the conducting wire is centered within the sensing unit, minimizing measurement errors and improving sensor performance.
Implementation Method 1
utilizing magnetic flux sensing to accurately determine the wire's position and electric current
Implementation Method 2
According to Ampere's principle, magnetic field is formed in the surrounding when electric current goes through a conductor. The intensity of magnetic field is in direct proportion to an electric current of the conductor and in inverse proportion to a distance to the conductor.
Data Source
AI summary
A proximity electric current sensing device includes a main body, a first and second adjusting components, a first to third sensing units. The main body has a hole for a conducting wire to go through. The first and second adjusting components are disposed on a first and second sides of the main body respectively for adjusting a first and second positions of the conducting wire. The first to third sensing units are disposed on the main body and adjacent to a first to third sides of the conducting wire respectively for sensing a first tothird magnetic fluxes of the conducting wire. The processing unit rotates the adjusting components to ensure the third sensing unit is right above the center of the conducting wire according to the first and second magnetic flux, estimates an installation position, and calculates an amount of an electric current according to the third magnetic flux.