Calibration Device for Induction Digestion Temperature Measurement
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Solution Overview
Problem
The accuracy of melting temperature measurement in induction digestion systems is compromised by temperature-dependent and aging-related changes in emissivity, leading to inaccuracies in pyrometer measurements.
Innovation Solution
A digestion device with a movable, rod-shaped temperature sensor that can be inserted into the crucible for precise temperature measurement, allowing for calibration to account for changes in emissivity and ensure accurate melting temperature detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a pyrometer is used to measure crucible temperature in an induction digestion system, then the measurement can be performed continuously and quickly, but the accuracy deteriorates due to temperature-dependent and aging-related changes in emissivity
Solution Approach 1:
The patent introduces a calibration device as an intermediary that includes a reference body with known emissivity properties and a temperature sensor. This calibration device mediates between the pyrometer and the crucible, providing reference measurements that account for emissivity variations. The calibration device is positioned in the measurement path and allows the system to determine correction factors that compensate for emissivity changes, thereby maintaining measurement accuracy while preserving the continuous measurement capability of the pyrometer.
Solution Approach 2:
The patent employs parameter changes by systematically varying the emissivity parameter through the use of different reference bodies with known emissivity values. The calibration process involves measuring temperatures with the pyrometer under different emissivity conditions and establishing correction relationships. This allows the system to adapt to changing emissivity parameters over time and temperature ranges, converting the pyrometer's rapid measurements into accurate temperature readings despite emissivity variations.
2Measurement precision
If the emissivity of the crucible changes with temperature and aging, then the pyrometer measurement becomes increasingly inaccurate, but frequent recalibration increases the loss of time
Solution Approach 1:
The patent implements preliminary action by performing initial calibration with the calibration device before actual digestion measurements. The calibration device establishes baseline correction factors that account for the specific crucible's emissivity characteristics. This preliminary calibration allows subsequent measurements to be accurate without requiring frequent recalibration, as the correction factors can be applied throughout the crucible's service life until significant aging occurs.
Solution Approach 2:
The patent incorporates feedback mechanisms where the calibration device provides reference measurements that are used to update correction factors. By periodically checking the calibration device against known reference temperatures and comparing pyrometer readings with actual temperatures, the system generates feedback that adjusts the emissivity compensation parameters. This feedback loop maintains measurement accuracy over time while minimizing the frequency of full recalibration procedures.
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 solution enables precise and reliable measurement of melting temperatures by compensating for temperature-dependent and aging-related changes in emissivity, improving the accuracy of temperature measurements in induction digestion systems.
Implementation Method 1
a temperature sensor (12) with which the actual melting temperature of the melt in a crucible (30) can be measured directly
Implementation Method 2
the heat radiation detection device (18) with which the heat radiation of the crucible (30) can be detected
Implementation Method 3
an induction unit (17) with which the crucible contents can be heated
Data Source
Figure 1a~2
Figure 3a~4b
AI summary
The invention relates to a temperature measuring device (10) for a digestion device for calibrating the melting temperature measurement, comprising a movable and at least partially rod-shaped temperature sensor (12) that can be inserted into a crucible (30), a movement device for moving the temperature sensor (12) between an initial position and a measuring position, and a bearing plate (14) on which the rod-shaped temperature sensor (12) and the movement device are mounted and which can be mounted in a digestion device.