Transformer Temperature Sensor Thermal Resistance Compensation
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Solution Overview
Problem
Existing converter devices in industrial measuring systems face challenges in accurately determining target temperatures, particularly when the measuring fluid temperature and pipe ambient temperature fluctuate, leading to measurement errors due to limited temperature measuring points and spatial distance, which can result in deviations of more than 0.5 K from the actual temperature.
Innovation Solution
The converter device incorporates two temperature sensors with different thermal resistances and coupling bodies to measure temperatures at distinct interfaces, allowing for precise determination of target temperatures by accounting for heat flow through the pipe and ambient fluid, with thermal resistances dimensioned to satisfy specific conditions to minimize measurement errors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a single temperature sensor is used to measure target temperature, then the device structure is simple, but measurement precision deteriorates when fluid temperature and ambient temperature fluctuate
Solution Approach 1:
The single temperature measurement function is segmented into two separate temperature sensors: a first temperature sensor for measuring fluid temperature and a second temperature sensor for measuring pipe ambient temperature. This segmentation allows independent measurement of the two temperature components, enabling accurate calculation of target temperature through mathematical combination of the two measurements, thereby resolving the contradiction between measurement precision and device complexity.
Solution Approach 2:
The patent introduces an intermediate calculation mechanism that uses the temperature difference between the fluid and ambient environment as a mediator. By measuring both temperatures separately and calculating their relationship, the system indirectly determines the target temperature with high precision without requiring direct contact sensors at the target location, thus improving measurement precision while maintaining reasonable device complexity.
2Measurement precision
If temperature sensors are placed at different spatial locations, then measurement precision improves, but the device structure becomes more complex
Solution Approach 1:
Each temperature sensor is strategically positioned to measure a specific local temperature characteristic: the first sensor measures fluid temperature at its location while the second sensor measures pipe ambient temperature. This local quality approach assigns different measurement functions to different spatial locations, improving overall measurement precision while keeping the arrangement systematic rather than random, thus managing device complexity.
3Measurement precision
If thermal coupling between sensors and measurement points is strengthened, then measurement precision improves, but temperature response time increases
Solution Approach 1:
The patent extracts the temperature measurement function from a single integrated sensor into two separate sensors with different thermal coupling characteristics. The first sensor is thermally coupled to measure fluid temperature while the second sensor measures pipe ambient temperature. By separating these functions, the system achieves accurate target temperature measurement without requiring either sensor to have extremely strong thermal coupling, thus balancing measurement precision with response time.
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 configuration enables accurate determination of target temperatures with an error of less than 0.2 K across a wide temperature range, even when temperatures change unpredictably, by effectively compensating for temperature differences between the measuring fluid and pipe ambient temperatures.
Implementation Method 1
a first temperature sensor (71) for measuring a first measuring point temperature (01), namely a temperature at a first temperature measuring point (poi 1) formed by means of the first temperature sensor (71), into a first temperature measuring signal (01)
Implementation Method 2
a second temperature sensor (72) for measuring a second measuring point temperature (02), namely a temperature at a second temperature measuring point (poi 2) formed by means of the second temperature sensor (72), into a second temperature measuring signal (02)
Implementation Method 3
the first thermal resistor, R1, the second thermal resistor, R2, the third thermal resistor, R3, and the fourth thermal resistor, R4, are dimensioned in such a way that, overall, they meet a condition (5)
Data Source
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AI summary
The invention relates to a transformer device comprising a transformer housing (100), a pipe (10), a temperature sensor (71), and a temperature sensor (72). The pipe is arranged within a cavity of the transformer housing such that, between an inner surface (100+) of a wall of the transformer housing facing the cavity and a shell surface (10#) of a wall of the pipe facing the cavity, an intermediate chamber (100') is formed. Furthermore, the pipe is designed to conduct a fluid (FL1) in the lumen thereof such that an inner surface (10+) of the wall of the pipe facing said lumen contacts the fluid conducted in the lumen. Each of the temperature sensors (71; 72) is formed by a temperature sensor (711; 721) arranged within the intermediate chamber (100') and by a coupling element (712; 722) coupling the temperature sensor (711; 721) to the wall of the pipe in a thermally conductive manner and is additionally designed to detect a measurement point temperature (ϑ1; ϑ2), namely a temperature at a first or second temperature measurement point formed by the temperature sensor (711; 721) and to transform said temperature into a corresponding temperature measurement signal (θ1; θ2), namely an electrical measurement signal representing the measurement point temperature (ϑ1; ϑ2).