Quad-Gradient Coil Antenna Arrays for Buried Object Locators
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Solution Overview
Problem
Current locating systems for buried or hidden objects, such as pipes and cables, are often costly, complex, and have variable sensitivity, necessitating the development of more compact and cost-efficient antenna arrays with improved sensitivity.
Innovation Solution
The use of quad-gradient coil antenna arrays, which include an omnidirectional antenna array and a gradient antenna array, along with a central support structure and optional dummy coils, to enhance sensitivity and reduce processing channels by determining field strength and gradients from a central point, allowing for efficient signal processing and display of buried object locations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional antenna arrays are used in locating systems, then the system can detect buried objects, but the system becomes costly and complex with variable sensitivity
Solution Approach 1:
The patent combines the omnidirectional antenna array and gradient antenna array into a single integrated antenna node assembly. The gradient coils are positioned around the omnidirectional array, sharing a common support structure and housing. This merging of functions into a unified structure reduces overall system complexity while maintaining both omnidirectional detection and gradient measurement capabilities, directly resolving the contradiction between sensitivity and device complexity.
Solution Approach 2:
The antenna node assembly serves multiple functions simultaneously: the omnidirectional array provides broad-area detection, the gradient array provides directional information, and together they enable precise buried object localization. The shared support structure and housing reduce redundancy. This multi-functionality approach allows the system to achieve high measurement precision without proportionally increasing device complexity, as a single integrated component performs multiple detection roles.
2Measurement precision
If traditional antenna arrays are used in locating systems, then the system can detect buried objects, but the manufacturing cost increases
Solution Approach 1:
By integrating the gradient coils and omnidirectional array into a single antenna node assembly with shared support structures and housing, the patent reduces the total number of separate components that need to be manufactured and assembled. This consolidation simplifies the manufacturing process and reduces material costs while maintaining the detection capabilities of both array types, thereby resolving the contradiction between detection capability and manufacturing cost.
Solution Approach 2:
The patent employs dummy coils with specific inductance values (e.g., 10-100 nH) that are deliberately designed to match the electrical characteristics of active gradient coils. This parameter matching allows the dummy coils to serve as placeholders during manufacturing and assembly, enabling simplified production processes while maintaining electrical balance and detection performance, thus reducing manufacturing costs without compromising detection capability.
3Adaptability or versatility
If multiple processing channels are used for antenna signal processing, then the system can process signals from multiple antenna elements, but the processing complexity and cost increase
Solution Approach 1:
The patent employs dummy coils that are electrically connected but do not contribute to the detection function. These dummy coils are included to balance the electrical characteristics and mutual inductance of the antenna array, ensuring proper signal processing from the active coils. The dummy coils act as placeholders that maintain the electrical environment needed for optimal performance without adding processing complexity, as they simply passively balance the circuit rather than requiring active signal processing.
Solution Approach 2:
The patent uses dummy coils with specifically designed inductance values (10-100 nH) to match the electrical parameters of the active gradient coils. This parameter matching ensures that the antenna array maintains proper electrical balance and mutual inductance characteristics even when dummy coils are included. By carefully selecting these parameter values, the system achieves proper signal processing capability without requiring additional processing channels, thus resolving the contradiction between adaptability and device complexity.
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 results in a more sensitive, cost-effective, and compact locating system capable of accurately detecting buried objects with reduced complexity, improving both manufacturing costs and user interface efficiency.
Implementation Method 1
Many current antenna arrays are costly to both the manufacturer and the customer, are unduly complex in configuration, and have variable sensitivity. Accordingly, there is a need for increasingly compact and improved antenna arrays for locating systems that are both highly sensitive
Data Source
AI summary
Buried object locators including an omnidirectional antenna array and a quad gradient array are disclosed. A locator display may include information associated with a buried object based on both omnidirectional antenna array signals and quad gradient antenna array signals.