Sensor Self-Calibration Through Controlled Parameter Changes
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Solution Overview
Problem
Existing sensor calibration methods rely on external reference stimuli or test signals, which are prone to errors due to changes in operating conditions and aging effects, limiting accuracy and robustness.
Innovation Solution
A method that determines and adjusts sensor properties by changing system parameters and processing sensor responses without the need for external reference stimuli or test signals, using a systematic approach to quantify changes in characteristic variables and apply corrections for self-calibration, monitoring, and measurement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If external reference stimuli or test signals are used for sensor calibration, then calibration can be performed, but accuracy and robustness are limited due to errors from changes in operating conditions and aging effects
Solution Approach 1:
The sensor system performs self-calibration by utilizing its own operational characteristics and responses to predefined stimuli patterns. The control unit analyzes the sensor's response behavior during normal operation and automatically adjusts calibration parameters without requiring external reference stimuli, making the system self-sufficient and immune to external condition variations
Solution Approach 2:
The method involves systematically varying operational parameters of the sensor system and analyzing how these changes affect the sensor response. By establishing relationships between parameter changes and response characteristics, the system can determine calibration state without external references, thereby maintaining accuracy across different operating conditions
2Measurement precision
If external reference stimuli or test signals are used for sensor calibration, then calibration can be performed, but additional effort and complexity are required for generating and managing these stimuli
Solution Approach 1:
The sensor system performs self-calibration by utilizing its own operational characteristics and responses to predefined stimuli patterns. The control unit analyzes the sensor's response behavior during normal operation and automatically adjusts calibration parameters without requiring external reference stimuli, making the system self-sufficient and immune to external condition variations
Solution Approach 2:
The control unit serves multiple functions: it controls the sensor operation, generates predefined stimuli patterns, analyzes sensor responses, and performs calibration adjustments. This multi-functionality eliminates the need for separate external calibration equipment, reducing overall system complexity while maintaining calibration capability
3Measurement precision
If the sensor is exposed to reference stimuli for calibration, then calibration can be performed, but the sensor must be removed from its operating surroundings
Solution Approach 1:
The calibration process is integrated into the normal operational workflow of the sensor system. The control unit performs calibration measurements during regular operation using predefined stimuli patterns that do not interrupt the sensor's primary function, allowing continuous operation without removal or downtime
Solution Approach 2:
The sensor system performs self-calibration by utilizing its own operational characteristics and responses to predefined stimuli patterns. The control unit analyzes the sensor's response behavior during normal operation and automatically adjusts calibration parameters without requiring external reference stimuli, making the system self-sufficient and immune to external condition variations
Data Source
AI summary
A method for determining, measuring and/or monitoring properties of a sensor system. In the method, a controlled change of at least one system parameter of the sensor system takes place in such a way that prior to the controlled change, the system parameter includes a first value and assumes at least one further value as a result of the controlled change. At least one characteristic variable of the sensor system and/or a change of the at least one characteristic variable of the sensor system is/are determined for the at least one further value of the system parameter. The determination, measuring and/or monitoring of properties of the sensor system take place based the at least one further value of the system parameter and the at least one characteristic variable determined in the second step and/or the change of the at least one characteristic variable.