Linearization Curve Calculation for Container Fill Level

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Solution Overview

Problem

Existing methods for determining the fill level in containers are inaccurate due to their inability to consider irregularities and built-in components, relying on manual measurements and linearization tables that fail to provide a precise correlation between filling height and fill level.

Innovation Solution

A method using a mobile end device equipped with an optical camera, depth sensor, and motion detector to acquire three-dimensional data, establishing a three-dimensional model of the container, and calculating a linearization curve that accounts for container geometry and internal components to determine the fill level from a filling height.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If manual measurements and linearization tables are used to determine fill level, then the method is simple to implement, but the measurement precision is poor because irregularities and built-in components cannot be considered

Engineering Contradiction:
Improvefill level measurement precisionVSAvoidmeasurement system complexity
Core Design Contradiction:
Measurement precisionVSDevice complexity

Solution Approach 1:

The patent creates a digital three-dimensional copy of the container's interior geometry using photogrammetry or laser scanning. This virtual model accurately reproduces the container's shape, irregularities, and built-in components, allowing precise fill level calculation without physical measurement devices inside the container. The digital copy enables the system to account for all geometric features that affect the fill level-filling height relationship.

Inventive Principle:
Principle #26Copying

Solution Approach 2:

The patent replaces traditional mechanical measurement methods (manual measurements, physical linearization tables) with an optical/electronic system. Using cameras or laser scanners to capture three-dimensional data, and computational algorithms to generate the linearization curve, substitutes the mechanical approach with a digital one that provides higher precision while maintaining ease of use.

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

2Reliability

If traditional linearization tables are used, then the calculation process is simple, but the reliability is poor due to inability to account for container irregularities and built-in components

Engineering Contradiction:
Improvefill level determination reliabilityVSAvoiddata acquisition and processing complexity
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The patent performs preliminary three-dimensional scanning and modeling of the container before actual fill level measurements are needed. The linearization curve is pre-calculated based on the captured geometry, storing the relationship between filling height and fill level in advance. This preliminary action ensures that all irregularities and built-in components are accounted for before measurements begin, improving reliability without adding complexity during actual operation.

Inventive Principle:
Principle #10Preliminary action

Solution Approach 2:

The patent transforms the container's physical geometric parameters into a digital representation, capturing the three-dimensional coordinates of the container's interior surface. By changing the parameter representation from physical to digital, the system can accurately incorporate irregularities and built-in components into the linearization calculation, significantly improving reliability.

Inventive Principle:
Principle #35Parameter changes

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 approach significantly enhances measurement accuracy by considering irregularities and built-in components, providing a more precise correlation between filling height and fill level compared to prior art methods.

Implementation Method 1

acquiring two dimensional data and a reference value of a container (10) having a symmetry with a mobile end device, having at least one optical camera (14)

Methodology Applied
Scientific EffectOptical imaging: Photography

Implementation Method 2

The acquisition of the three dimensional data of the container (10) occurs in accordance with one or a combination of the methods: time of flight, structured light or stereoscopy

Methodology Applied
Scientific EffectTime of flight: Time of Flight

Implementation Method 3

a mobile end device (12), having at least one optical camera (14), a depth sensor (16) and a motion detector (18)

Methodology Applied
Scientific EffectMotion detection: Accelerometer

Data Source

PatentUS10809112B2Method for calculating a linearization curve for determining the fill level in a container and the use of a mobile end device for said method
Publication Date: 2020.10.20 VEGA GRIESHABER GMBH & CO
  • US10809112B2 patent drawing
  • US10809112B2 patent drawing
  • US10809112B2 patent drawing

AI summary

Method for calculating a linearization curve for determining the fill level in a container from a filling height, said method comprising the following steps: acquiring three-dimensional data of the container with a mobile end device, having at least one optical camera, a depth sensor and a motion detector, establishing a three-dimensional model of the container, and calculating the linearization curve from the three-dimensional model for determining a fill level from a measured filling height.