Sensor Calibration Medium Drive Mechanism
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Solution Overview
Problem
Current sensor calibration methods require high-quality, expensive standardized calibration media and complex mechanisms, which are prone to errors due to aging and environmental changes, especially when capturing large areas or sensitive measurements like banknotes, leading to inaccurate assessments and increased operational costs.
Innovation Solution
A method where a calibration medium with multiple references is moved into and out of the sensor's beam path, using a high-quality calibration medium with standardized references only during initial calibration, and an inexpensive calibration medium with non-standard references for ongoing operations, ensuring precise calibration and long-term stability by accounting for deviations and environmental changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If high-quality standardized calibration media are used for sensor calibration, then measurement precision is improved, but cost increases and reliability deteriorates due to aging and environmental changes
Solution Approach 1:
The patent applies preliminary action by performing initial calibration with high-quality standardized references to establish accurate baseline measurements, then using these pre-calibrated references stored in memory for subsequent calibrations. This eliminates the need to repeatedly use expensive standardized references while maintaining calibration accuracy through comparison with the stored baseline data.
Solution Approach 2:
The patent applies copying by creating a digital copy of the calibration data from high-quality standardized references and storing it in memory. Instead of physically retaining the expensive standardized references, the system copies their measurement characteristics and uses these digital copies for ongoing calibrations, thereby maintaining precision while reducing vulnerability to physical degradation.
2Adaptability or versatility
If separate mechanisms are used for each calibration medium in the sensor housing, then adaptability is improved, but device complexity increases
Solution Approach 1:
The patent applies taking out by extracting the calibration medium from the sensor housing and placing it in the beam path during calibration mode. This eliminates the need for complex internal mechanisms to fold and unfold multiple calibration media within the housing, while still enabling adaptable calibration through external positioning of the calibration medium.
Solution Approach 2:
The patent applies universality by using a single drive mechanism that can position different calibration media (with various reference types) in the beam path. The system achieves multi-functionality through a unified positioning system that handles diverse calibration requirements without requiring separate mechanisms for each calibration medium.
3Ease of operation
If calibration media are accommodated within the sensor housing, then ease of operation is improved, but measurement precision deteriorates due to focus deviation from the actual measurement location
Solution Approach 1:
The patent applies intermediary by introducing a movable positioning system that acts as a mediator between the sensor housing and the calibration medium. The drive mechanism precisely positions the calibration medium at the optimal location in the beam path, ensuring it lies within the focus range of the sensor during calibration, thereby maintaining measurement precision while preserving ease of operation.
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 allows for precise and cost-effective calibration of sensor systems, maintaining long-term stability and accuracy by using high-quality references only once during initial calibration, and utilizing inexpensive non-standard references for ongoing operations, thus reducing the risk of errors and environmental influences.
Implementation Method 1
signals generated one after the other on the basis of the excitation signal by the standardized references of the further calibration medium are detected by at least one sensor of the sensor system
Data Source
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AI summary
The invention relates to a device and a method for calibrating a sensor system. The invention is based on a device for calibrating a sensor system, having at least one sensor and at least one excitation source, a control device for controlling the sensor system, a calibration medium and a drive which, in a calibration mode for calibrating the sensor system, moves the calibration medium, under the control of the control device, into a beam path of the sensor system, and in an operating mode for checking measured objects, in particular bank notes, moves the calibration medium out of the beam path of the sensor system, in which device the calibration medium has more than one reference in which the drive, under the control of the control device, moves the calibration medium into the beam path of the sensor system in such a way that one of the references covers a sensing region of the sensor system and the sensor system measures the reference lying in the sensing range, in which device, under the control of the control device, the drive moves the calibration medium at least once by a predefined distance or a multiple of the predefined distance, with the result that another of the references covers the sensing range, and the sensor system measures the other reference in the sensor range, and in which device the predefined distance corresponds to an extension of the individual references of the calibration medium, in the direction of which extension the drive moves the calibration medium.