Sensor Signal Correction via Idle Scanning for Detection Accuracy
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional sensor correction methods, primarily relying on startup calibration or manual adjustments, result in inconsistent sensor states during scanning, leading to poor image quality and potential misjudgments in detecting magnetic information on currency and other media due to environmental factors like temperature and humidity.
Innovation Solution
A detection method and apparatus that involves idle scanning to obtain correction data, scanning a correction specimen page to further refine data, and using this data to correct output signals from a to-be-detected object, ensuring accurate detection results by accounting for the current sensor state through feedback correction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If startup correction or manual correction is used, then device complexity is reduced, but measurement precision deteriorates due to inconsistent sensor states
Solution Approach 1:
The patent performs idle scanning and correction specimen page scanning before actual detection to obtain correction data in advance. This preliminary action establishes accurate correction parameters (offset and gain values) that compensate for sensor inconsistencies, thereby improving measurement precision without requiring complex real-time correction mechanisms during detection.
Solution Approach 2:
The patent implements a feedback correction mechanism where the sensor scans correction specimen pages with known magnetic patterns, compares the scanned results with expected values, and automatically calculates correction data. This feedback loop continuously optimizes sensor performance, maintaining high measurement precision through automated adjustment rather than manual intervention.
2Ease of operation
If no correction is performed, then ease of operation is improved, but reliability deteriorates due to environmental factors affecting sensor performance
Solution Approach 1:
The sensor system performs self-correction by automatically scanning correction specimen pages and generating correction data without external intervention. The system independently identifies and compensates for its own deviations caused by environmental factors, maintaining reliability while keeping the operation simple and automated.
3Measurement precision
If real-time correction scanning is performed, then measurement precision is improved, but productivity decreases due to additional scanning steps
Solution Approach 1:
The correction scanning is performed as a preliminary step before batch detection operations. By establishing accurate correction parameters in advance through idle scanning and correction specimen page scanning, the system enables rapid correction-free detection of subsequent samples, improving overall productivity while maintaining high precision.
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 ensures accurate detection results by real-time correction of sensor output signals, reducing the impact of environmental changes and inconsistent sensor states, thereby enhancing the reliability of image quality and identification processes.
Implementation Method 1
a magnetoelectric conversion element (4) which is provided in the bias magnetic field and between the transport path and the magnetic field generation unit and detects magnetic field intensity in a direction identical to the direction of the bias magnetic field
Data Source
Figure 1~3
AI summary
Provided are a detection method, a detection apparatus, a storage medium and a processor. The detection method includes: using a sensor for idle scanning to obtain a first output electrical signal, and performing feedback correction on the first output electrical signal to eliminate a noise of the first output electrical signal to obtain first correction data; using the sensor to scan a correction specimen page to obtain a second output electrical signal, and performing the feedback correction on the second output electrical signal to eliminate a noise of the second output electrical signal to obtain second correction data; calculating according to the first correction data, the second correction data and an electrical signal predetermined value to obtain third correction data; using the sensor to scan a to-be-detected object to obtain a third output electrical signal; and correcting the third output electrical signal according to the first correction data and the third correction data. In the detection method, the electrical signal obtained by scanning the to-be-detected object is corrected in real time during each detection, thus obtaining an accurate detection result.