Segmented Ferrite Sonde Core for Multi-Frequency Utility Locating
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Solution Overview
Problem
Conventional sonde devices suffer from inefficiencies due to unoptimized core structures that result in significant eddy currents, limiting their effectiveness in generating magnetic field signals for locating purposes. Additionally, these devices often operate at a single frequency, which restricts their detection capabilities in scenarios requiring multiple or variable frequency signals.
Innovation Solution
The sonde device incorporates a core structure with multiple ferrite arc core section elements, designed to minimize eddy currents and enhance magnetic field generation. This configuration allows the sonde to emit output magnetic field signals at one or more frequencies, including manual or automatic frequency switching, and includes features such as a color-changing LED for visual frequency indication and a central passage for use with various tools.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If a conventional core structure composed of metals such as steel or a cylindrical bar of ferrite is used, then the sonde device can generate magnetic fields, but eddy currents are not optimized resulting in loss of efficiency
Solution Approach 1:
The core structure is divided into multiple discrete ferrite arc segments arranged in a circular pattern rather than using a single continuous cylindrical core. This segmentation interrupts the eddy current paths, reducing eddy current losses while maintaining the magnetic field generation capability through the distributed ferrite segments.
Solution Approach 2:
The invention uses ferrite material with specific magnetic properties to construct the arc segments, combining the advantages of high magnetic permeability with reduced eddy current effects. The ferrite composite structure optimizes both magnetic field generation and energy efficiency by selecting materials with appropriate electrical and magnetic characteristics.
2Adaptability or versatility
If conventional sonde devices are configured to operate at one frequency, then the device structure is simplified, but detection capabilities are limited under circumstances where multiple and/or variable frequency magnetic field signals would be useful
Solution Approach 1:
The sonde device incorporates a frequency switching mechanism that allows dynamic adjustment between multiple operating frequencies. The system can switch between different frequency modes based on detection requirements, enabling adaptability to various underground utility detection scenarios while maintaining a relatively compact structure through shared core and winding components.
Solution Approach 2:
The core structure and winding system are designed to support multiple frequency operations, making the device universally applicable for different detection needs. The same physical infrastructure (core, windings, housing) serves multiple frequency functions, reducing overall device complexity while enhancing versatility.
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 use of multiple ferrite arc core section elements significantly reduces eddy currents, improving the efficiency of magnetic field signal generation. The ability to operate at multiple frequencies enhances detection capabilities, while the integrated features such as automatic frequency switching and visual indicators improve user interaction and system performance.
Implementation Method 1
Conventional sonde devices often employ a core structure composed of metals such as steel or a cylindrical bar of ferrite. As such, these core structures, used with batteries, are not optimized at reducing eddy currents resulting in a loss of efficiency for the sonde device.
Implementation Method 2
a sonde, which is a device for generating magnetic fields within a pipe, conduit, or other cavity
Implementation Method 3
The one or more windings may be disposed about the core structure. The windings may include primary and secondary windings.
Data Source
AI summary
Sonde devices for providing magnetic field signals for use with utility locators or other devices are disclosed. In one embodiment a sonde device includes a housing, a core comprising a plurality of core sections, and one or more support structures, which may include windings. Circuit and/or power supply elements may be disposed fully or partially within the core to control generation of predefined magnetic field frequencies and waveforms.