Thermal Array Mode Control for Uniform Heating Profiles
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Solution Overview
Problem
Existing thermal systems lack efficient control mechanisms for precise temperature regulation and heat distribution, particularly in applications requiring high-definition heating profiles.
Innovation Solution
A thermal system comprising a base heater layer and a tuning layer with individually controllable heating elements, coupled with a control system that calculates and applies power to each mode sequentially, measuring electrical characteristics to achieve precise temperature control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If power is applied to thermal elements in a thermal array, then heat distribution is achieved, but thermal inconsistencies and temperature non-uniformity occur
Solution Approach 1:
The thermal array is divided into multiple independently controllable thermal elements or zones. Each zone can be controlled separately with different power levels and time periods, allowing precise temperature management across the entire array to eliminate thermal inconsistencies and achieve uniform temperature distribution.
Solution Approach 2:
The system applies power to different thermal zones in a periodic sequence, cycling through multiple modes where each mode activates specific thermal elements for calculated time periods. This periodic switching enables average temperature control and compensates for thermal lag, achieving uniform temperature profiles across the thermal array.
2Measurement precision
If multiple modes are used for thermal control, then temperature precision is improved, but system complexity increases
Solution Approach 1:
The control system dynamically switches between multiple predefined modes, where each mode represents a specific power distribution pattern across thermal zones. The system calculates optimal time periods for each mode and indexes through them sequentially, enabling precise temperature control through dynamic mode transitions rather than static control.
Solution Approach 2:
The system changes operational parameters by transitioning between different modes, each with distinct power levels and time periods for various thermal zones. This parameter variation across modes allows precise temperature control while managing complexity through structured mode definitions rather than continuous parameter adjustment.
3Productivity
If sequential mode indexing is used to control thermal elements, then power distribution efficiency is improved, but control time increases
Solution Approach 1:
The system pre-calculates optimal time periods for each mode before execution. By determining the required duration for each mode in advance based on thermal characteristics and desired temperature profiles, the system eliminates unnecessary waiting time and optimizes the overall control cycle efficiency, balancing power distribution with time constraints.
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 temperature regulation and uniform heat distribution, compensating for thermal changes and equipment degradation, and reduces strain on heating elements through CTE matching.
Implementation Method 1
a combination of base and tuning heater layers with temperature-dependent resistance circuits for precise control
Implementation Method 2
temperature-dependent resistance circuits for precise control
Data Source
Figure 1a
Figure 1b
Figure 1c
AI summary
A system and method is provided. In one aspect, the system and method may calculate a time period for each mode of a plurality of modes. The system and method may index through each mode for the corresponding time period to provide power to the plurality of thermal elements according to the mode. In another aspect the system and method may index sequentially through each mode of a plurality of modes and apply power to an indexed mode while measuring an electrical characteristic of the thermal elements for the indexed mode.