Capacitive Voltage Sensor Tubular Body Design
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Solution Overview
Problem
Capacitive voltage sensors face issues such as air bubbles in the dielectric resin leading to partial discharges, resin detachment due to poor adhesion, high component costs, component movement during assembly, and non-conforming products due to resin solidification, especially in varying temperature environments.
Innovation Solution
A capacitive sensor system featuring a source electrode and tubular body with self-supporting insulating material, conductive layers for shielding and capacitive coupling, and through holes for resin flow, ensuring precise assembly and preventing vacuoles and detachment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If dielectric resin is used to encapsulate sensor components, then mechanical protection and insulation are improved, but air bubbles form causing partial discharges and resin detachment occurs
Solution Approach 1:
The patent introduces a porous polymeric material layer between the resin and sensor components. This porous layer acts as a buffer that allows resin to penetrate and bond effectively while trapping air bubbles within its structure, preventing them from causing partial discharges. The material's porosity enables it to absorb excess resin and accommodate thermal expansion differences.
Solution Approach 2:
The polymeric material serves as an intermediary layer between the dielectric resin and the sensor components (electrodes and tubular body). This intermediate layer improves adhesion by providing a transition zone that accommodates the different thermal expansion coefficients and surface properties of the resin and components, preventing resin detachment during temperature cycling.
2Ease of operation
If traditional sensor components are assembled, then sensor functionality is achieved, but components move during assembly and transport causing non-conforming products
Solution Approach 1:
The patent incorporates positioning features directly into the tubular body structure before assembly. The tubular body includes integrated positioning protrusions or guides that pre-establish the correct spatial relationship between components, preventing movement during subsequent assembly and transport operations. This preliminary structuring ensures components remain in their designed positions throughout manufacturing.
3Measurement precision
If multiple sensor components are used to achieve sensor functionality, then detection capability is improved, but manufacturing cost increases
Solution Approach 1:
The patent combines multiple functional components into an integrated tubular body structure. The tubular body integrates the capacitive sensor elements, positioning features, and shielding functions into a single monolithic component, reducing the total part count and assembly complexity while maintaining detection capability. This merging eliminates the need for separate expensive components.
Solution Approach 2:
The tubular body is designed as a multi-functional component that simultaneously serves as the capacitive sensor element, the structural housing, the positioning reference, and the electrical shield support. This universal design consolidates multiple functions into one component, reducing manufacturing cost by eliminating the need for separate specialized parts.
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 system effectively detects the electric field generated by the source electrode while minimizing interference from external fields, reducing partial discharges, and enhancing the structural integrity and reliability of the sensor.
Implementation Method 1
a first thin layer of conductive material applied to the outer surface of said self-supporting tubular laminar element, wherein said first thin layer of conductive material is designed to perform the electrical shield function
Implementation Method 2
a second thin layer of conductive material applied to the inner surface of said self-supporting tubular laminar element, wherein said second thin layer of conductive material is able to form an armature for a capacitive coupling
Data Source
AI summary
A construction system regarding a capacitive voltage sensor, comprises a source electrode (110/210/310/410), a tubular body (120/220/320/420), and a mass of dielectric insulating material (140/240/340/440). The tubular body (120/220/320/420) comprises: a self-supporting tubular laminar element (123/223/323/423) made of insulating material, in which the self-supporting tubular laminar element (123/223/323/423) is stretched to form the support structure for said tubular body (120/220/320/420); a first thin layer (124/224/324/424) of conductive material applied to the outer surface of said self-supporting tubular laminar element (123/223/323/423), wherein said first thin layer (124/224/324/424) of conductive material is intended to perform the function of an electric screen; a second thin layer (125/225/325/425) of conductive material applied to the inner surface of said self-supporting tubular laminar element (123/223/323/423), wherein said second thin layer (125/225/325/425) of conductive material is designed to form an armature for a capacitive coupling.