Vibration-Based Hardening Monitoring for Chemical Anchors
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Solution Overview
Problem
Existing methods for assessing the integrity of the chemical connection between a fastener and a fastening base can only determine if the connection is 'good' or 'bad', failing to provide detailed information on the hardening process of a hardenable mass, which is crucial for determining the load-bearing capacity and timing of when the fastener can be subjected to forces.
Innovation Solution
A method involving a vibration generator and analyzer that applies harmonic vibrations to a fastening arrangement, allowing for the detection and analysis of changes in vibration frequencies and amplitudes to monitor the hardening process of a curable mass, providing precise data on the bonding process and load capacity of the fastener.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a vibration generator and analyzer are used to monitor the hardening process, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The patent introduces a vibration generator as an intermediary device that couples vibrations to the fastening arrangement, and a vibration analyzer that detects the vibrational response. These intermediary measurement tools enable precise monitoring of the hardening process without directly interfering with the chemical bonding between the fastener and substrate, thereby achieving high measurement precision while keeping the overall system relatively simple.
Solution Approach 2:
The patent applies mechanical vibration principles by using a vibration generator to excite the fastening arrangement and a vibration analyzer to detect changes in vibrational characteristics. As the curable mass hardens, it changes the damping and stiffness of the system, which alters the vibrational response. This non-contact, dynamic measurement approach provides precise hardening monitoring without requiring complex direct material analysis equipment.
2Device complexity
If only good state and bad state are detected, then device complexity is reduced, but loss of information increases
Solution Approach 1:
The patent implements continuous feedback monitoring by using the vibration analyzer to track changes in the vibrational response of the fastening arrangement throughout the hardening process. The system provides real-time information about the bonding state, allowing users to monitor the progression from liquid to solid state and determine the optimal loading time. This continuous feedback replaces binary good/bad detection with a spectrum of hardness information, eliminating information loss while maintaining manageable device complexity.
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
Enables precise monitoring of the hardening process, allowing for timely determination of when the fastening means can be loaded and providing a percentage indication of load capacity, thus optimizing the use and safety of the fastening system.
Implementation Method 1
The vibration generator produces input vibrations, particularly with constant frequency and/or constant amplitude, so-called harmonic or periodic vibrations, and transmits these to the fastening element, thereby exciting it to produce output vibrations.
Implementation Method 2
A vibration analyzer is used to detect and/or analyze the output vibrations of the fastening element.
Implementation Method 3
Curing is understood to mean a transition from a pasty, liquid, or viscous consistency of the curable compound to a solid consistency.
Data Source
Figure 1~2
AI summary
The invention relates to a method for measuring a hardening process of a hardenable mass (3). The method comprises adhesively bonding an anchor rod (5) into a drill hole (2) by means of the hardenable mass (3). During the hardening process of the hardenable mass (3), a vibration generator (9) stimulates the fastening means (4) to perform output vibrations which are detected and analysed by a vibration analyser (12), from which the progress of the hardening process can be inferred.