Road Finisher Screed Heating Timing for Minimal Idle Time
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Solution Overview
Problem
Current road finishing machines require pre-operation heating of the screed, which is inefficient and requires precise planning, making it economically and ecologically challenging.
Innovation Solution
A method and system for automatically heating the screed of a road finishing machine using a control unit to determine a start time for heating based on predetermined operational time, considering environmental and thermal parameters, allowing for efficient energy use and reduced operational planning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the screed is heated before the road finishing machine is put into service, then the material can be reliably heated to the desired temperature, but this requires precise planning and causes idle time
Solution Approach 1:
The control unit initiates heating of the screed in advance based on predicted work start time, material temperature requirements, and environmental conditions. This preliminary action ensures the screed reaches optimal temperature before material application begins, eliminating the need for last-minute heating and precise operational planning.
Solution Approach 2:
The control unit continuously monitors the actual temperature of the screed and environmental conditions, then adjusts the heating duration and intensity accordingly. This feedback mechanism allows the system to optimize heating time in real-time, reducing idle time while ensuring reliable material heating.
2Reliability
If the screed is heated for a long period before operation, then the working temperature is reliably achieved, but energy consumption increases
Solution Approach 1:
The heating system dynamically adjusts its operation based on real-time temperature measurements and environmental conditions. The control unit modulates heating intensity and duration to match actual requirements, preventing both overheating and insufficient heating, thereby optimizing energy consumption while ensuring reliable working temperature achievement.
Solution Approach 2:
The system changes heating parameters (power level, duration, timing) based on environmental temperature, humidity, wind conditions, and predicted work start time. This adaptive parameter adjustment allows the system to achieve reliable heating with minimal energy consumption by matching heating intensity to actual thermal requirements.
3Productivity
If manual planning of heating time is required, then the operation can be scheduled, but this creates operational complexity
Solution Approach 1:
The control unit autonomously determines and executes the heating schedule without requiring manual intervention. It automatically predicts work start time, calculates required heating duration based on environmental conditions and material requirements, and initiates heating accordingly. This self-service capability eliminates operational complexity while maintaining productive scheduling.
Solution Approach 2:
The manual planning process is replaced by an automated control system that uses sensors, processors, and algorithms to determine optimal heating timing. This substitution of manual mechanical planning with automated electronic control reduces operational complexity while improving scheduling accuracy and productivity.
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 the screed reaches the required working temperature with minimal idle time, saving energy and improving operational convenience while being more environmentally friendly.
Implementation Method 1
one or more electrical resistance heating elements which may be formed as removable heating coils or rods
Data Source
AI summary
A method for heating a screed of a road finishing machine, the method including obtaining a predetermined time for putting the screed into operation; obtaining a start time for beginning the heating of the screed based on the predetermined time; and automatically heating the screed by energy supply to a heating means of the screed from an energy source from the start time.