Road Finisher Temperature Field Correction for Interfering Objects
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Incorrect temperature measurements occur during asphalt road construction due to interfering objects, leading to falsified temperature fields and unsatisfactory documentation, as existing systems struggle to differentiate between actual material defects and temporary interfering objects.
Innovation Solution
A method for creating a temperature field that detects and corrects for interfering objects by measuring temperature points at different times, using a temperature gradient to identify and filter out erroneous measurements, and assigning a new temperature value based on later measurements within the nominal range, thereby improving the accuracy of the temperature field.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If temperature measurements are taken continuously during paving, then temperature field documentation is improved, but interfering objects cause erroneous measurements that falsify the temperature field
Solution Approach 1:
The system performs preliminary actions by taking multiple temperature measurements at each measuring point before finalizing the temperature field data. By measuring temperature at a measuring point multiple times (at different positions or moments), the system can identify and eliminate erroneous measurements caused by interfering objects, ensuring that only reliable temperature values are used in the final temperature field documentation.
2Stability of the object's composition
If interpolation is used to overwrite cooling points, then homogeneous temperature field image is improved, but actual material defects may be overwritten and hidden
Solution Approach 1:
The system uses feedback mechanisms to control the interpolation process. By evaluating whether measured temperature values deviate from expected material-specific cooling behavior, the system can determine when interpolation is appropriate and when it might hide actual defects. The feedback loop ensures that interpolation is applied selectively only when confident that the temperature deviation is due to temporary interfering objects rather than material defects.
3Reliability
If multiple temperature measurements are taken at each measuring point, then interfering objects can be detected and filtered, but data volume and processing complexity increase
Solution Approach 1:
The system changes parameters by evaluating temperature values against predetermined criteria such as material-specific cooling coefficients and temperature ranges. By using these parameter-based filters, the system can automatically distinguish between legitimate temperature variations (due to material cooling) and erroneous measurements (caused by interfering objects), reducing the need for complex manual analysis while maintaining high detection accuracy.
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 ensures a more accurate temperature field representation, reducing erroneous measurements and enhancing quality control, allowing for better documentation and control input for paving processes, while reducing data storage volume.
Implementation Method 1
A temperature of at least one measuring point lying within the measuring range is measured at different times in order to detect the interfering object
Implementation Method 2
A known system uses an infrared camera for this, whose image data is converted into scanning lines by software
Data Source
AI summary
A method and a road finisher for creating a temperature field of a newly laid paving layer corrected for interfering-related temperature measurement errors. It is recognised that when the paving layer is paved, a measuring point is covered by an interfering object at a first time if, contrary to an expected material-specific cooling at a later second time during paving at the same measuring point, a larger temperature value particularly lying within a nominal temperature range than a temperature value measured to the preceding first time is measured, wherein instead of the temperature value detected at the first time a new temperature value is assigned to the measuring point in the temperature field.