Retrofit Pavement Compaction Analyzer With Vibration Feedback
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Solution Overview
Problem
Current methods for assessing pavement compaction quality are inadequate, leading to costly overruns and early deterioration due to under- or over-compaction, as they require expensive new equipment and are limited by time-consuming core sampling, which does not provide real-time feedback.
Innovation Solution
A Retrofit Intelligent Compaction Analyzer (RICA) device is retrofitted to existing vibratory compactors, using sensors and real-time data analysis to estimate compaction levels, providing density and stiffness information to operators, allowing for immediate adjustments to achieve uniform compaction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If core sampling is used to assess pavement compaction quality, then measurement precision is improved, but loss of time increases and productivity decreases
Solution Approach 1:
The patent replaces the mechanical core sampling method with a sensor-based detection system that uses accelerometers and vibration analysis to assess compaction quality in real-time during the compaction process, eliminating the need for time-consuming post-compaction core sampling
Solution Approach 2:
The system provides real-time feedback to the operator during compaction operations by analyzing vibration data and comparing it against target compaction criteria, allowing immediate adjustment of compaction parameters without waiting for post-compaction testing
2Manufacturing precision
If new intelligent compaction equipment is purchased, then manufacturing precision is improved, but device complexity and cost increase
Solution Approach 1:
The system uses the existing vibratory compactor's own vibration characteristics as the measurement basis, requiring no separate detection equipment. The compactor's inherent vibrations are captured by simple accelerometers already mounted on the compactor frame, making the system self-contained and avoiding additional complex equipment
Solution Approach 2:
The accelerometers serve multiple functions: they monitor compaction quality, detect compaction uniformity, and provide real-time feedback control, eliminating the need for separate specialized equipment and reducing overall system complexity
3Reliability
If real-time compaction monitoring is implemented, then reliability is improved, but device complexity increases
Solution Approach 1:
The patent replaces complex electronic sensing systems with a simplified vibration-based measurement approach using accelerometers that naturally respond to compaction forces, reducing system complexity while maintaining reliable real-time monitoring
Solution Approach 2:
The system uses vibration data as an intermediary parameter that indirectly indicates compaction quality, avoiding the need for direct complex measurements of density or stiffness while providing reliable real-time control information
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 real-time quality control during pavement construction, reducing construction and maintenance costs by ensuring adequate compaction, preventing early deterioration, and improving pavement performance and longevity.
Implementation Method 1
monitors the fundamental frequency of vibrations of a roller drum of the roller machine during compaction
Implementation Method 2
a roller machine is typically utilized to make a number of passes over the layer of asphalt material... with an operator driving the roller machine back and forth over the asphalt material
Data Source
AI summary
A method, apparatus and system for providing an estimate of the level of compaction of a layer of pavement materials in real time. In some embodiments, a Retrofit Intelligent Compaction Analyzer (RICA) processor of a RICA device receives vibrational energy data from a sensor module which corresponds to impact responses of a drum of a roller machine during compaction of a pavement material over a section of pavement. The RICA processor also receives temperature data from the sensor module, determines an estimated level of compaction in real time of the section of pavement based on the vibrational energy data, pavement material characteristics data and the temperature data, and displays a density level percentage of the section of pavement on a display device for viewing by an operator of the roller machine.