Heating Control Sensor Correction via Phase Alignment
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Solution Overview
Problem
Older heating systems lack a separate input for specifying correction signals for flow temperature, making it difficult to communicate a correction value to the heating controller, leading to inaccuracies in flow temperature control due to unknown sensor characteristics and non-stationary heating conditions.
Innovation Solution
The method involves detecting or reconstructing the characteristic curve of the sensor by bringing measured value sequences from the sensor and a reference sensor into phase, using cross-covariance or cross-correlation functions to correct time offsets, and using the phase-corrected characteristic curve to determine a correction value for the heating control system, thereby improving the accuracy of flow temperature adjustment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a reference sensor with known characteristic curve is used to determine sensor characteristics, then the accuracy of flow temperature control is improved, but time offset errors occur during non-stationary heating conditions
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting the characteristic curve based on the determined time offset. The control device modifies the temperature-resistance relationship parameters to compensate for the time delay between reference sensor and sensor measurements, thereby maintaining accuracy during non-stationary conditions
Solution Approach 2:
The patent uses the reference sensor with known characteristic curve as a template to create a corrected characteristic curve for the unknown sensor. By copying the reference sensor's known characteristics and adjusting for time offset, the system determines the unknown sensor's characteristics without direct calibration
2Adaptability or versatility
If the characteristic curve of the sensor is unknown, then the heating system can operate with basic sensor, but accurate correction value determination is not possible
Solution Approach 1:
The patent implements feedback by continuously comparing the unknown sensor's measurements with the reference sensor's known characteristic curve. The control device uses this feedback to iteratively determine the unknown sensor's characteristic curve and calculate accurate correction values for flow temperature control
Solution Approach 2:
The reference sensor acts as an intermediary with known characteristic curve, mediating between the unknown sensor and the control device. It provides a reference framework that enables the determination of the unknown sensor's characteristics without requiring direct calibration of the unknown sensor itself
3Measurement precision
If correction value specification is implemented in older heating systems, then flow temperature control accuracy is improved, but the system lacks separate input for correction signals
Solution Approach 1:
The patent applies universality by making the existing sensor input serve multiple functions. The same sensor connection is used both for measuring flow temperature and for receiving correction value specifications, eliminating the need for separate correction signal inputs while maintaining improved control accuracy
Solution Approach 2:
The patent merges the correction value specification function with the existing sensor input. By combining these functions into a single input channel, the system achieves improved flow temperature control without increasing device complexity or requiring additional hardware inputs
Data Source
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AI summary
The method involves detecting a characteristic of the sensor by comparing the measured values of the sensor with measured values of a reference sensor with known characteristics. The measured value sequences of the sensor and measured value sequences of the reference sensor are brought into phase with each other. An independent claim is also included for a device for determining a correction value.