Optical Measurement Instrument Temperature Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing optical measurement instruments face challenges in maintaining a stable temperature within the measurement chamber, leading to variations that affect the accuracy of sample measurements, especially due to differences in temperature/power characteristics of heating resistors and the surrounding environment.
Innovation Solution
The implementation of a temperature control system using heating resistors with distinct balancing coefficients (B1 and B2) to regulate electrical power supply based on temperature signals, ensuring a uniform temperature distribution within the measurement chamber, even when temperature is measured from a single spot, without the need for multiple measurements or complex multivariable control systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If heating resistors are used to warm the measurement chamber, then temperature stability is improved, but temperature distribution uniformity deteriorates due to different temperature/power characteristics of heating resistors and surrounding environment
Solution Approach 1:
The patent applies local quality by assigning different balancing coefficients (B1, B2, etc.) to different heating resistors based on their specific locations and thermal characteristics. Each heating resistor is controlled with a customized power level that accounts for local environmental factors, such as proximity to the measurement chamber walls or other heat sources. This localized adjustment ensures uniform temperature distribution across the measurement chamber while maintaining overall temperature stability.
2Measurement precision
If multiple temperature measurements are taken to compensate for temperature variations, then measurement accuracy is improved, but device complexity increases due to need for multiple measurements and complex control systems
Solution Approach 1:
The patent applies preliminary action by pre-determining the balancing coefficients for each heating resistor during the design and calibration phase. These coefficients are stored in the control system and automatically applied during operation. This eliminates the need for complex real-time calculations or multiple temperature measurements during actual use, as the temperature compensation strategy has already been prepared in advance based on the known thermal characteristics of each heating resistor and its location.
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 allows for precise control of the measurement chamber temperature, enhancing measurement accuracy and consistency by compensating for differences in temperature/power characteristics, thus maintaining optimal conditions for sample analysis.
Implementation Method 1
heating resistors placed at different places of the measurement chamber and arranged to warm the measurement chamber
Data Source
Figure 1a
Figure 1b
Figure 1c
AI summary
An optical measurement instrument comprises: an excitation light source (120) arranged to produce an excitation beam for at least one of samples to be measured and a detector (132) arranged to detect an emission beam emitted by one of the samples to be measured and to produce a detection signal responsive to the detected emission beam. The optical measurement instrument further comprises an arrangement for controlling temperature of the samples to be measured. The arrangement comprises: one or more temperature sensors (176) for producing one or more temperature signals responsive to temperature of a measurement chamber (170) of the optical measurement instrument, one or more heating resistors (171-175) arranged to warm the measurement chamber, and a controller (177) arranged to control electrical power supplied to the heating resistors on the basis of the one or more temperature signals.