Heat Meter Transfer Function Segmentation for Sensor Calibration
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Solution Overview
Problem
Existing heat meters require paired temperature sensors with similar resistance characteristics for accurate measurements, making individual sensor replacement impractical and limiting their use to only officially verifiable liquid media applications, while also introducing errors due to differing sensor characteristics.
Innovation Solution
Storing distinct transfer functions for each temperature sensor in the computing means allows for independent calibration and replacement, enabling high measurement accuracy without paired sensors and extending usage to gaseous media, with parameters recorded in an officially verifiable log.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If paired temperature sensors with matching resistance characteristics are used, then measurement accuracy is improved, but individual sensor replacement becomes impossible and device complexity increases
Solution Approach 1:
The patent divides the temperature measurement system into independent segments by assigning separate transfer functions to each temperature sensor. Instead of treating sensors as a paired unit, each sensor (first temperature sensor and second temperature sensor) is calibrated and stored independently in the computing means, allowing individual replacement while maintaining measurement accuracy.
Solution Approach 2:
The patent changes the parameter storage approach from unified paired sensor characteristics to individual sensor-specific transfer functions. Each temperature sensor has its own stored transfer function in the computing means, allowing the system to adapt to individual sensor characteristics rather than requiring matched pairs.
2Measurement precision
If paired temperature sensors are required, then measurement accuracy is maintained, but ease of repair deteriorates as individual sensor replacement is not possible
Solution Approach 1:
The system segments the temperature sensing function into independent sensor units, each with its own transfer function stored in the computing means. This allows any single temperature sensor to be replaced without affecting the other sensor or requiring recalibration of the entire pair, significantly improving ease of repair.
Solution Approach 2:
The computing means automatically adapts to individual sensor characteristics by using stored transfer functions specific to each sensor. When a sensor is replaced, the system can independently handle the new sensor's characteristics through its dedicated transfer function, enabling self-service replacement without requiring professional calibration services.
3Device complexity
If a single transfer function is used for both temperature sensors, then device complexity is reduced, but measurement precision deteriorates due to errors from differing sensor characteristics
Solution Approach 1:
The patent applies local quality by assigning specific transfer functions to specific temperature sensors based on their individual characteristics. Instead of using a generic transfer function for both sensors, each sensor location has its own optimized transfer function stored in the computing means, improving measurement precision without significantly increasing overall system complexity.
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 flexible and accurate heat measurement with unpaired temperature sensors, allowing for individual sensor replacement and expanded application to non-liquid media, maintaining official verification and improving measurement precision.
Implementation Method 1
temperature sensors, which have a temperature dependent resistance, are often applied as the measuring transducer
Implementation Method 2
temperature sensors, which have a temperature dependent resistance, are often applied as the measuring transducer
Implementation Method 3
the flow sensor serves to register volume or mass of a heat transport medium flowing in the feed line or drain line
Implementation Method 4
the computing means serves to calculate, by means of the measurement signals output by the flow sensor and the first and second temperature sensors, amount of exchanged heat
Data Source
AI summary
A measuring arrangement comprising a heat meter having a flow sensor, a first temperature sensor, a second temperature sensor and computing means. The first temperature sensor serves to register a temperature in the feed line of the heat exchanger and the second temperature sensor serves to register a temperature in the drain line of the heat exchanger. The computing means serves to calculate the amount of heat exchanged. A first transfer function, which serves to determine the temperature in the feed line based on a measurement signal of the first temperature sensor, is stored in the computing means; a second transfer function is stored in the computing means; wherein the first transfer function differs from the second transfer function; and the second transfer function serves to determine the temperature in the drain line based on a measurement signal of the second temperature sensor.