Belt Grinder State Detection Using Multi-Sensor Machine Learning

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Solution Overview

Problem

Existing belt grinders lack effective methods to monitor and control influencing variables for achieving higher quality grinding results, reducing abrasive belt wear, and extending the lifespan of the grinder.

Innovation Solution

A method using a machine learning system to determine state information by analyzing measurement data from various sensors, including sound, vibration, and temperature sensors, to provide precise insights into the belt grinder's and abrasive belt's condition, enabling autonomous control and maintenance.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If traditional monitoring methods with reference curves are used, then the system structure remains simple, but the measurement precision and reliability of belt state detection are insufficient

Engineering Contradiction:
Improvedetection accuracy of belt stateVSAvoidsystem complexity
Core Design Contradiction:
Measurement precisionVSDevice complexity

Solution Approach 1:

The patent replaces traditional mechanical reference curve comparison methods with a machine learning-based detection system. Multiple sensors (acceleration, temperature, acoustic emission) collect data that is processed by trained neural networks to determine belt states, achieving higher measurement precision through intelligent algorithms rather than simple threshold comparisons.

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

Solution Approach 2:

The patent introduces a machine learning system as an intermediary between raw sensor data and belt state determination. The trained neural network acts as a mediator that processes complex multi-sensor data patterns to accurately identify belt conditions, bridging the gap between simple sensor measurements and reliable state detection.

Inventive Principle:
Principle #24Intermediary (Mediator)

2Reliability

If multiple sensors and machine learning systems are implemented, then the reliability of belt state determination improves, but the device complexity increases

Engineering Contradiction:
Improvereliability of belt state determinationVSAvoidsystem complexity
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The patent segments the monitoring system into distinct functional modules: multiple specialized sensors (acceleration, temperature, acoustic emission), data acquisition unit, machine learning processing unit with trained neural networks, and output unit. This segmentation allows each component to perform its specific function reliably while maintaining overall system manageability despite the increased complexity.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The machine learning system serves multiple functions simultaneously: it processes data from various sensor types, identifies different belt states (wear, damage, temperature issues), and provides comprehensive monitoring. This multi-functionality consolidates what would otherwise require separate specialized systems, improving reliability without proportionally increasing complexity.

Inventive Principle:
Principle #6Universality (Multi-functionality)

3Manufacturing precision

If real-time monitoring with machine learning is implemented, then grinding quality improves, but the use of energy increases

Engineering Contradiction:
Improvegrinding qualityVSAvoidenergy consumption of monitoring system
Core Design Contradiction:
Manufacturing precisionVSUse of energy by moving object

Solution Approach 1:

The system implements partial monitoring by focusing on critical belt states and parameters rather than continuously analyzing all possible variables. The machine learning model is trained to identify the most significant indicators of belt condition and grinding quality, processing only the essential data needed to maintain precision while minimizing energy consumption.

Inventive Principle:
Principle #16Partial or excessive action

4Loss of information

If comprehensive sensor data collection is performed, then the information available for analysis increases, but the loss of time for data processing increases

Engineering Contradiction:
Improvecompleteness of belt state informationVSAvoiddata processing time
Core Design Contradiction:
Loss of informationVSLoss of time

Solution Approach 1:

The system performs preliminary action by pre-training the machine learning models offline with extensive sensor data before deployment. During actual operation, the already-trained neural networks rapidly process incoming sensor data without requiring extensive real-time computation. This shifts the time-consuming processing to the training phase, enabling fast real-time belt state determination.

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

Enhances grinding quality, reduces abrasive belt wear, and extends the lifespan of the belt grinder by providing real-time monitoring and control, allowing for efficient operation and maintenance.

Implementation Method 1

an emission coming from the abrasive belt for processing the workpiece is determined, wherein reference curves for states of the abrasive belt in relation to heating or in relation to soundwaves coming from the abrasive belt are compared with actual values of the heating and the soundwaves

Methodology Applied
Scientific EffectSound wave detection: Sound

Implementation Method 2

A belt grinder is to be understood as a tool for grinding a workpiece, in which the grinding means is realized in the form of a revolving abrasive belt

Methodology Applied
Scientific EffectVibration detection: Vibration

Implementation Method 3

reference curves for states of the abrasive belt in relation to heating or in relation to soundwaves coming from the abrasive belt are compared with actual values of the heating and the soundwaves

Methodology Applied
Scientific EffectThermal detection: Heating

Data Source

PatentUS12397392B2Method for determining state information relating to a belt grinder by means of a machine learning system
Publication Date: 2025.08.26 ROBERT BOSCH GMBH
  • US12397392B2 patent drawing
  • US12397392B2 patent drawing
  • US12397392B2 patent drawing

AI summary

A method determines state information relating to a belt grinder. The belt grinder has at least one abrasive belt for grinding a workpiece. The method includes providing measurement data relating to the belt grinder, and determining the state information from the measurement data using a machine learning system. The machine learning system is configured to determine the state information based on the provided measurement data.