Magnetic Field Detecting Device Using Single Coil and Decoupling Circuit
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional magnetic impedance sensors require two coils to apply a bias magnetic field or perform feedback operations, increasing production costs and complexity.
Innovation Solution
A single detecting coil is used to apply a bias magnetic field and improve accuracy through a decoupling circuit with an impedance network, comprising a resistor, coil, or capacitor, which blocks the flow of alternate current damped oscillation voltage and induces a magnetic field on the amorphous wire.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If two coils are used to apply bias magnetic field or perform feedback operation, then measurement precision and accuracy are improved, but device complexity and manufacturing cost increase
Solution Approach 1:
The detecting coil is designed to perform multiple functions: it serves as both the detecting coil for measuring magnetic field variations and as the bias coil for applying bias magnetic field. The same coil structure is used to generate both the detecting signal and the bias field, eliminating the need for separate bias coil windings and reducing manufacturing complexity.
Solution Approach 2:
The patent combines the detecting coil and bias coil into a single integrated coil structure. By merging these two previously separate components into one, the device reduces the number of production process steps, decreases the number of defective products, and simplifies manufacturing while maintaining the functional capabilities of both coils.
2Ease of manufacture
If two coils are used for bias magnetic field application, then production cost increases, but ease of manufacture deteriorates
Solution Approach 1:
The detecting coil is designed to perform multiple functions: it serves as both the detecting coil for measuring magnetic field variations and as the bias coil for applying bias magnetic field. The same coil structure is used to generate both the detecting signal and the bias field, eliminating the need for separate bias coil windings and reducing manufacturing complexity.
Solution Approach 2:
The patent combines the detecting coil and bias coil into a single integrated coil structure. By merging these two previously separate components into one, the device reduces the number of production process steps, decreases the number of defective products, and simplifies manufacturing while maintaining the functional capabilities of both coils.
3Measurement precision
If two coils are used for feedback operation, then measurement accuracy is improved, but device complexity increases
Solution Approach 1:
The detecting coil is designed to perform multiple functions: it serves as both the detecting coil for measuring magnetic field variations and as the feedback coil for applying feedback magnetic field. The same coil structure is used to generate both the detecting signal and the feedback field, eliminating the need for separate feedback coil windings and reducing manufacturing complexity.
Solution Approach 2:
The patent combines the detecting coil and feedback coil into a single integrated coil structure. By merging these two previously separate components into one, the device reduces the number of production process steps, decreases the number of defective products, and simplifies manufacturing while maintaining the functional capabilities of both coils.
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 configuration maintains high detection accuracy while reducing production costs and complexity by eliminating the need for additional coils, allowing for precise magnetic field measurement and feedback without saturating the sensor.
Implementation Method 1
applying an electrical current from a voltage source or from a current source to the detecting coil that detects the alternate current damped oscillation voltage induced in response to an external magnetic field around the amorphous wire and that is wound around the amorphous wire
Implementation Method 2
a decoupling circuit, connected to a circuit between a voltage source or current source and the detecting coil, for blocking the flow of the alternate current damped oscillation voltage to said voltage source or current source
Implementation Method 3
a magnetic impedance sensor including a magnetic impedance element in which pulse or high frequency electrical current is applied to an amorphous wire, and an alternate current damped oscillation voltage is induced by a detecting coil wound around the amorphous wire in response to the external magnetic field thereof
Data Source
AI summary
A magnetic field detecting device which comprises a magnetic impedance sensor including a magnetic impedance element 1 in which a pulse electrical current or a high frequency electrical current is applied from an oscillator 2 to an amorphous wire 10 and an alternate current or AC damped oscillation voltage, which is induced in a detecting coil 11 wound around the amorphous wire 10 and has a magnitude corresponding to an external magnetic field, is output, and an arbitrary magnetic field is applied to the amorphous wire by means of the magnetic field generated on the detecting coil 11 energized by connecting the detecting coil 11 to a voltage source or to a current source E through an impedance network 3 comprising of a resistor R or a coil L or a condenser C or comprising a combination of the resistor R, the coil L, and the condenser C.