Utility Meter RTD Detection Algorithm
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Solution Overview
Problem
Utility meters are typically configured during manufacturing to use specific types of resistive temperature devices, limiting their ability to connect with different types of probes and increasing the risk of installation errors and erroneous consumption measurements.
Innovation Solution
A utility meter equipped with a calculator device that detects the type of resistive temperature device connected using a sensor detection algorithm, allowing it to adapt the measuring algorithm accordingly, enabling the connection of various types of temperature sensing probes and ensuring accurate measurements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the utility meter is configured during manufacturing to use a specific type of RTD, then the measuring algorithm is optimized for that sensor type, but the ability to connect with different types of probes is limited
Solution Approach 1:
The system performs preliminary detection of the RTD type during installation by measuring resistance at multiple temperatures and comparing against stored reference values. This preliminary action identifies the sensor type before full measurement operation begins, allowing the system to switch to the appropriate measuring algorithm in advance.
Solution Approach 2:
The measuring algorithm is made dynamic rather than fixed - the system automatically selects and switches between different measuring algorithms based on the detected RTD type. The algorithm selection is updated in real-time during installation based on the actual sensor characteristics, allowing the same hardware to adapt to different sensor types.
2Adaptability or versatility
If the utility meter is configured during installation to match the connected probe type, then probe compatibility is improved, but the risk of installation errors increases
Solution Approach 1:
The system implements feedback by measuring the actual resistance values of the connected RTD at multiple temperatures and using this feedback information to automatically identify the sensor type. The measured resistance values are compared against stored reference ranges, and the system adjusts its configuration based on this feedback, eliminating manual configuration errors.
Solution Approach 2:
The utility meter performs self-identification and self-configuration during installation. Instead of requiring manual setup, the system automatically detects the RTD type through resistance measurement and autonomously selects the correct measuring algorithm, reducing installation errors while maintaining versatility.
3Adaptability or versatility
If manual configuration is performed during installation, then the measuring algorithm can be adapted to the connected probe, but installation time and complexity increase
Solution Approach 1:
The system performs automatic self-detection of the RTD type through resistance measurement at multiple temperatures. The installation process requires no manual intervention for configuration - the system autonomously identifies the sensor type and configures itself, significantly reducing installation time while maintaining full adaptability to different probe types.
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
The utility meter can automatically validate and configure itself to use different types of temperature sensing probes, reducing installation errors and ensuring accurate thermal energy measurements by detecting the type of probe and selecting the appropriate measuring algorithm.
Implementation Method 1
Temperature changes are detected by measuring changes in the resistance of the RTD. The resistance of the RTD changes with the temperature in a known manner
Data Source
AI summary
Utility meter for measuring thermal energy delivered to a point of consumption by a fluid supplied via a supply flow and a return flow, including a flow meter unit for measuring a supply flow rate or return flow rate of the fluid; a pair of temperature sensing probes for measuring temperatures of the supply flow and the return flow, each of the temperature sensing probes including a resistive temperature device; and a calculator device configured for executing a measuring algorithm for determining an amount of thermal energy delivered to the point of consumption over a period of time based on flow rates and temperatures received from the flow meter unit and temperature sensing probes, respectively; wherein the calculator device is configured to detect the type of resistive temperature device included in the temperature sensing probes and to adapt the measuring algorithm according to the type of resistive temperature device.