Capacitive Level Sensor Electrode Housing for Accurate Interface Measurement

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Solution Overview

Problem

Existing capacitive liquid level sensors suffer from low serviceability and high measurement errors due to an inefficient and unreliable design of the electrode probe housing, particularly when measuring liquids with varying permittivity.

Innovation Solution

A capacitive level sensor design featuring a base with a recess for a computing unit, metal electrode housing with aligned vent holes and slits, and electrodes of varying lengths connected via metal rods, ensuring secure fixation and accurate capacitance measurements without the need for further calibration.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a conventional housing design for electrode probes is used, then the sensor can be manufactured, but the serviceability is low and measurement errors are high

Engineering Contradiction:

Improvemeasurement accuracyVSAvoidserviceability

Core Design Contradiction:

ReliabilityVSEase of repair

Solution Approach 1:

The sensor is divided into modular components: a base unit with computing equipment and a separate electrode housing with electrodes. This segmentation allows the electrode housing to be easily replaced or serviced without affecting the computing unit, improving both serviceability and measurement reliability through dedicated functional modules.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

A coupling device acts as an intermediary between the base and electrode housing, providing a reliable connection mechanism that ensures stable electrical contacts while allowing for easy assembly and disassembly. This intermediary component resolves the contradiction by enabling both easy serviceability and reliable measurement through standardized interfaces.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Measurement precision

If the electrode housing design is improved for reliability, then measurement accuracy increases, but the device complexity increases

Engineering Contradiction:

Improvelevel measurement accuracyVSAvoidhousing structure complexity

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The electrode housing serves multiple functions: it provides structural support for electrodes, acts as a protective enclosure, facilitates electrical connections through the coupling device, and enables easy replacement. This multi-functionality reduces the need for additional components, maintaining simplicity while achieving high measurement precision.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The electrodes are pre-positioned and fixed within the electrode housing during manufacturing, with connection points prepared in advance. This preliminary action ensures accurate electrode positioning for precise measurements while simplifying field installation and reducing on-site complexity.

Inventive Principle:

Principle #10Preliminary action

3Ease of manufacture

If the sensor design is simplified for ease of manufacture, then manufacturing cost decreases, but measurement precision may be compromised

Engineering Contradiction:

ImprovemanufacturabilityVSAvoidelectrode positioning accuracy

Core Design Contradiction:

Ease of manufactureVSManufacturing precision

Solution Approach 1:

By separating the electrode housing from the computing unit, each component can be manufactured independently using optimized processes. The electrode housing can be mass-produced with pre-positioned electrodes, ensuring consistent positioning accuracy, while the computing unit is manufactured separately, overall improving both manufacturability and precision.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Electrodes are pre-positioned and fixed within the electrode housing during the housing manufacturing process, ensuring accurate positioning is built into the component itself. This preliminary positioning action guarantees manufacturing precision while allowing the housing to be manufactured using standard, cost-effective processes.

Inventive Principle:

Principle #10Preliminary action

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 design enhances reliability, manufacturability, and measurement accuracy, allowing for precise level detection in liquids with different permittivity without additional calibration.

Implementation Method 1

capacitive level sensor

Methodology Applied

Scientific EffectCapacitance: Capacitance

Implementation Method 2

measure the level of liquid media with different permittivity

Methodology Applied

Scientific EffectPermittivity: Dielectric Permittivity

Data Source

PatentUS12523514B2Capacitive level sensor, sensitive element of the capacitive level sensor, electrode housing for the capacitive level sensor

Publication Date: 2026.01.13 PANKOV BORIS VALAREVICH

AI summary

The proposed technical solution relates to measuring technology and is intended for measuring levels of measured medium in various branches of industry. The technical problem solved by the claimed invention is the production of a capacitive level sensor which demonstrates high operational reliability and provides highly accurate measurements. The technical result achieved by using the claimed invention consists in overcoming the disadvantages of the prior art, increasing the reliability and manufacturability of the design and thus increasing the accuracy of interface level measurements.