Magnetostrictive Position Transducer Flat Coils
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Solution Overview
Problem
Magnetostrictive position transducers are complex and cumbersome, particularly due to the detection solenoid coil, which increases construction times and production costs.
Innovation Solution
A magnetostrictive position transducer design featuring a waveguide of magnetostrictive material housed within an outer metal profile, with a second conduction member for excitation current return and dampeners to manage torsional mechanical waves, and a plurality of flat coils on printed circuit boards for enhanced detection sensitivity and reduced complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a detection solenoid coil is used in the magnetostrictive transducer, then the position detection function is achieved, but the device complexity and construction time increase
Solution Approach 1:
The patent extracts the detection function from the complex solenoid coil assembly and relocates it to a simplified flat coil configuration. The detection solenoid coil is replaced with flat coils that can be directly mounted on the waveguide, eliminating the need for complex solenoid structures while maintaining the position detection capability through magnetic field interaction with the magnetic cursor.
Solution Approach 2:
The patent replaces the mechanical solenoid coil system with a flat coil system that uses magnetic field interaction directly on the waveguide. This substitution eliminates the need for complex mechanical solenoid assemblies and reduces construction time while maintaining detection functionality through electromagnetic interaction between the flat coils and the magnetic cursor.
2Reliability
If a detection solenoid coil is used in the magnetostrictive transducer, then the position detection function is achieved, but the production cost increases
Solution Approach 1:
The patent extracts the detection function from the expensive solenoid coil assembly and implements it through simpler flat coils that can be directly mounted on the waveguide. This extraction eliminates the need for costly solenoid components while maintaining detection capability, thereby reducing production costs.
Solution Approach 2:
The patent employs flat coils that are simpler and less expensive to manufacture compared to solenoid coils. These flat coils can be directly integrated into the waveguide structure, providing a cost-effective solution that reduces production expenses while maintaining the necessary detection function.
3Reliability
If a detection solenoid coil is used in the magnetostrictive transducer, then the position detection function is achieved, but the assembly time increases
Solution Approach 1:
The patent extracts the detection function from the complex solenoid coil assembly process and implements it through flat coils that can be directly mounted on the waveguide. This extraction significantly reduces the assembly time required for the transducer while maintaining the position detection function.
Solution Approach 2:
The patent incorporates the flat coils directly into the waveguide structure during the manufacturing process, performing the detection component assembly in advance. This preliminary integration eliminates the need for separate solenoid coil assembly steps, thereby reducing overall assembly time.
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 design simplifies the construction and maintenance of the transducer, reduces production costs, and improves reproducibility by integrating flat coils on printed circuit boards, allowing for faster assembly and easier replacement, while maintaining accurate position detection.
Implementation Method 1
An excitation current pulse is made to flow on the waveguide or on a copper conductive wire coaxial to the same waveguide, such as to induce a magnetic field having circular symmetry around the waveguide
Implementation Method 2
the magnetic field associated to the magnetic cursor, and the magnetic field induced by the excitation current pulse interact, and induce a torsional elastic deformation on the waveguide by magnetostrictive effect
Implementation Method 3
the torsional mechanical wave is detected by a detection solenoid coil coupled to the circular tube, and converted to an electrical signal
Data Source
Figure 1
Figure 2~3
Figure 4~5
AI summary
It is described a magnetostrictive position transducer comprising a first transduction member of the magnetostrictive type (3), a second transduction member (7) operatively associated to the first transduction member (3), of a physical signal generated by magnetostrictive effect by the first transduction member (3) at the passage of an excitation current pulse under the action of the interaction between a magnetic field associated to a magnetic cursor which can be associated to the magnetostrictive transducer, and a magnetic field induced by the excitation current pulse. The magnetostrictive transducer results to be characterized in that the second transduction member (7) comprises a plurality of flat coils (9) distributed in a first printed circuit board (8).