Variable Target Temperature Control to Prevent Overshoot
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Solution Overview
Problem
Temperature control systems often experience overshooting or hunting when there is a large temperature difference between the current temperature and the target temperature, leading to prolonged stabilization times, even with rapid heating or cooling.
Innovation Solution
A temperature control apparatus and method that uses a heat absorbing/radiating device, temperature detecting device, and a controlling device to set a variable target temperature based on the current temperature and target temperature information, allowing for dynamic adjustment of the temperature control to prevent overshooting and undershooting by setting initial and subsequent target temperatures strategically.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If rapid heating or cooling is performed to reduce stabilization time, then the heating/cooling speed is improved, but overshooting or hunting occurs leading to prolonged stabilization time
Solution Approach 1:
The patent applies dynamics by making the target temperature variable rather than fixed. The target temperature is dynamically adjusted based on the current temperature state, allowing the system to adapt its heating/cooling rate throughout the process. This resolves the contradiction by enabling rapid changes when needed while automatically preventing overshooting through real-time target adjustment.
Solution Approach 2:
The patent changes the parameter of target temperature from a constant value to a variable that changes according to the current temperature. By modifying this key parameter dynamically, the system can achieve both rapid heating/cooling and prevent overshooting, thus resolving the contradiction between speed and stability.
2Ease of operation
If a fixed target temperature is set for control, then the control simplicity is improved, but the stabilization time is prolonged due to overshooting or hunting
Solution Approach 1:
The patent applies preliminary action by pre-calculating and setting appropriate target temperatures before the actual heating/cooling process begins. The target temperature is determined in advance based on the current temperature state, which allows the system to avoid overshooting from the outset rather than correcting it afterward, thus reducing stabilization time while maintaining control simplicity.
Solution Approach 2:
The patent applies skipping by strategically selecting target temperatures that allow the system to rush through the critical phase of temperature change without overshooting. By skipping intermediate temperature stages and directly targeting optimal values, the system reduces the number of oscillations and accelerates stabilization.
3Productivity
If aggressive temperature control is applied to reduce stabilization time, then the productivity is improved, but the temperature precision is reduced due to overshooting
Solution Approach 1:
The patent applies feedback by continuously monitoring the current temperature and using this information to adjust the target temperature dynamically. This closed-loop feedback mechanism allows the system to maintain high productivity through aggressive control while ensuring temperature precision by automatically correcting the target temperature to prevent overshooting based on real-time temperature measurements.
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 enables faster stabilization of the temperature control target at the desired temperature by preventing excessive heating or cooling, reducing the time required to reach and maintain the target temperature.
Implementation Method 1
a heat absorbing/radiating device configured to heat or cool a temperature control target
Implementation Method 2
a temperature detecting device configured to detect a first temperature around the temperature control target
Data Source
AI summary
This temperature control device is provided with: an endothermic/exothermic unit that heats or cools a subject to be subjected to temperature control; a temperature detection unit that detects the first temperature of the periphery of the subject; a control unit that controls the endothermic/exothermic unit on the basis of a variable target temperature; and a variable target temperature setter that sets the variable target temperature to a first variable target temperature on the basis of the first temperature and target temperature information indicating the target temperature. With such temperature control device, since the target temperature changes to a suitable value as needed, a time needed until the temperature of the subject reaches the target temperature can be shortened.