Adaptive Temperature Controller for Chromatography
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing temperature control systems for heating elements in chromatographic analysis and other applications are cumbersome, requiring multiple parts, leading to increased space, weight, and cost, and are unable to provide rapid and uniform temperature changes.
Innovation Solution
An adaptive temperature controller that measures electrical resistance of an electrically-conductive material to determine its temperature and apply necessary voltage or current for precise control, eliminating the need for separate sensors and allowing for rapid and uniform heating and cooling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a separate temperature sensor (RTD) is used to monitor the temperature of a conductive element, then temperature monitoring is achieved, but the number of parts increases, increasing space, weight, and cost
Solution Approach 1:
The patent combines the temperature monitoring function with the heating element itself by using the heating element's electrical resistance as the temperature sensor. The controller measures the resistance of the heating element directly, eliminating the need for a separate RTD sensor. This merging of functions reduces the number of parts, space, weight, and cost while maintaining temperature monitoring capability.
Solution Approach 2:
The heating element is given dual functionality: it serves both as the heat source and as the temperature sensor. By measuring the electrical resistance of the heating element, the system simultaneously controls heating and monitors temperature with a single component, achieving multi-functionality that resolves the contradiction between measurement capability and device complexity.
2Temperature
If traditional temperature control systems are used, then temperature control is achieved, but rapid temperature changes cannot be produced
Solution Approach 1:
The system implements continuous feedback by measuring the heating element's resistance in real-time and using this information to dynamically adjust the power supply output. This closed-loop control enables rapid response to temperature changes and allows the system to achieve fast temperature transitions while maintaining precise control, resolving the contradiction between control accuracy and speed of temperature change.
3Temperature
If traditional heating systems are used, then heating is achieved, but heating is not uniform and not sufficiently fast
Solution Approach 1:
The system dynamically adjusts the power distribution to the heating element based on real-time resistance measurements. By continuously adapting the heating power according to the actual temperature conditions reflected in the resistance values, the system achieves uniform heating across the element while maintaining fast response capability, resolving the contradiction between heating uniformity and heating speed.
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
The adaptive temperature controller reduces equipment weight and cost, achieves uniform heating, and enables rapid temperature changes by directly controlling the electrically-conductive material, improving temperature control efficiency and accuracy.
Implementation Method 1
the temperature of such conductive element was monitored by a separate device... However this requires multiple parts... such systems often were unable to produce rapid temperature changes. Moreover, heating of equipment was not uniform and often was not sufficiently fast
Implementation Method 2
the controller determines the resistance of the electrically-conductive material at one or more predetermined temperatures and is able to determine the corresponding resistance of the electrically-conductive material at other temperatures within a temperature range
Data Source
AI summary
The adaptive temperature controller system includes a device for measuring resistance, an electrically-conductive material, a power supply, and a device for controlling power. In operation, the controller determines the resistance of material at one or more temperatures and therefore determines the resistance of the material through a range of operating temperature. Based on such determination so long as voltage and power are known, the resistance of the material, and therefore its temperature, are known. As a result the voltage or power may be instantly varied to produce near infinite control over material temperature.