Inductive Displacement Detector With Integrated Shielding
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing inductive detectors face challenges in accurately measuring displacement due to interference from nearby metal objects and external electromagnetic fields, which complicates their construction and operation.
Innovation Solution
The design incorporates a configuration with a passive electromagnetic target and laminar windings, where the electromagnetic influence varies with position, and includes insulating and shielding elements that reduce material requirements and mechanical complexity, such as using a solid piece of material, laminar windings, and shields that are chemically secured or embedded, allowing for reduced shielding material and improved mechanical bonding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If traditional shielding arrangements are used to protect against electromagnetic interference, then electromagnetic shielding effectiveness is improved, but device complexity and material requirements increase
Solution Approach 1:
The patent combines the insulating portion and shield into a single integrated component. The shield is chemically secured to the insulating portion, merging two previously separate functions (electrical insulation and electromagnetic shielding) into one unified structure. This reduces the number of separate components and simplifies the overall device construction while maintaining both insulation and shielding effectiveness.
Solution Approach 2:
The insulating portion with chemically secured shield serves multiple functions simultaneously: it provides electrical insulation between conductive elements, offers electromagnetic shielding against external fields, and acts as a structural support element. This multi-functionality reduces the need for separate lateral shields and other protective components, thereby reducing device complexity.
2Reliability
If multiple separate components are used for target construction, then functional requirements are met, but manufacturing complexity increases
Solution Approach 1:
The patent merges the insulating portion and shield into a single integrated component that can be manufactured as one piece. The shield is chemically secured to the insulating portion during the manufacturing process, eliminating the need for separate assembly steps involving fasteners or mechanical fastening. This integration simplifies manufacturing while ensuring reliable electrical and mechanical connections.
Solution Approach 2:
The patent employs composite construction where the shield (conductive material) is chemically bonded to the insulating portion (non-conductive material). This composite structure combines the beneficial properties of both materials in a single integrated component, achieving both electrical insulation and electromagnetic shielding functions with improved manufacturing efficiency.
3Object-affected harmful factors
If lateral shields are included to improve shielding coverage, then electromagnetic shielding effectiveness is improved, but material requirements and device complexity increase
Solution Approach 1:
The patent extracts and eliminates the requirement for separate lateral shields by integrating shielding functionality into the insulating portion itself. The shield is positioned and oriented to provide effective electromagnetic shielding for the critical measurement path without extending laterally in all directions. This selective approach maintains shielding effectiveness where needed while reducing overall material consumption.
Solution Approach 2:
The patent applies shielding selectively rather than uniformly throughout the entire device structure. The shield is chemically secured to specific portions of the insulating portion where electromagnetic shielding is most critical for the measurement path. This localized approach provides adequate shielding coverage while minimizing the quantity of shielding material required.
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 simplifies the construction of inductive detectors, reduces material requirements, and enhances resistance to electromagnetic noise and mechanical failure, while maintaining accurate displacement measurement without the need for lateral shields or fasteners.
Implementation Method 1
an arrangement of laminar windings... the electromagnetic influence of the first body on the second body varies according to the position of the first body relative to the second body
Implementation Method 2
at least one of said first and second bodies incorporating an insulating portion and a shield... enhances resistance to electromagnetic noise
Data Source
AI summary
An inductive detector for measuring the position of a first body relative to a second body along a measurement path comprises: a first body which comprises a substantially planar surface and a passive electromagnetic target; a second body which comprises a substantially planar surface facing the planar surface of the first body and an arrangement of laminar windings; said first and second body being configured such that the electromagnetic influence of the first body on the second body varies according to the position of the first body relative to the second body along the measurement path; wherein said passive electro-magnetic target comprises a first portion incorporating said planar surface and a second portion with a lower thickness than said first portion; whereby the second portion incorporates an insulating aperture.