I. Technical Improvements
1. Enhancing Magnetic Detection Accuracy
Optimizing Magnetic Head Design and Installation:
- Advanced processing and assembly techniques: Ensure proper friction between the magnetic head and the banknotes by controlling the height of the magnetic head within a precise range, avoiding false positives or missed detections. For example, using precision mechanical equipment to keep the height tolerance of the magnetic head very small to enhance detection accuracy.
- Optimized placement of the magnetic head: Position the magnetic head to cover the critical magnetic areas of the banknote more effectively. Adjust the head’s position and angle based on the magnetic distribution of banknotes of different denominations for better magnetic signal detection.
Multi-head Detection:
- Introduce multiple magnetic heads to detect the magnetic properties of banknotes from different angles. By analyzing and comparing signals from multiple heads, a comprehensive understanding of the banknote’s magnetic features can be obtained, improving counterfeit detection. For example, using three magnetic heads to capture magnetic variations from the front, side, and diagonal perspectives.
- Advanced signal processing algorithms can be developed to integrate signals from multiple magnetic heads. Data fusion technology can combine the magnetic signals, extracting more representative feature information to make more accurate counterfeit judgments.
In-depth Study of Specific Magnetic Features:
- Conduct in-depth research on the magnetic characteristics of the metal wire and serial numbers in the fifth series of the Chinese Yuan. Analyze the rectangular wave patterns and the magnetic properties of the numbers, and develop specialized detection algorithms. For example, by analyzing parameters like frequency, amplitude, and phase of the rectangular wave, combined with the magnetic strength and distribution pattern of the digits, a more precise counterfeit detection model can be built.
- Continuous updates to detection algorithms are required to accommodate changes in magnetic properties across different versions of banknotes, ensuring the accuracy of detection even with updated currency versions.
2. Optimizing Fluorescent Detection Sensitivity
Hardware Optimization:
- Use high-quality UV lamps and photoelectric sensors to improve the ability to detect fluorescence. Choose UV lamps with high stability and long life to ensure they emit strong UV light consistently. Select highly sensitive and fast-response sensors to accurately capture the fluorescent signals from banknotes.
- Regularly check and replace UV lamps to avoid decreased fluorescence intensity due to lamp aging. Establish a lamp replacement schedule based on usage and performance degradation. For example, after a certain period, test the UV lamp, and when its light output weakens, promptly replace it.
- Install dust prevention devices on the surface of the photoelectric sensor to minimize dust interference. For example, use micro-pore filter materials to design dust covers that effectively block dust without affecting light transmission.
Sensitivity Adjustment:
- Set appropriate sensitivity parameters for different types of banknotes and environments. Based on extensive experimentation and data analysis, determine the optimal sensitivity range for various conditions. For example, set different sensitivity parameters for new and old banknotes to improve detection accuracy.
- Provide adjustable sensitivity buttons in the banknote counter for users to fine-tune according to real-world conditions, such as banknote quality or environmental humidity, for optimal detection.
II. Maintenance and Care Strategies
1. Regular Cleaning and Inspection
Focused UV Lamp Cleaning:
- UV lamps are a critical part of counterfeit detection using optical technology. Dusting the lamp regularly with a brush or cloth ensures light intensity remains unaffected. Always unplug the machine before cleaning to ensure safety.
- Establish a UV lamp cleaning schedule based on the environment. In dusty areas, clean the lamp weekly; in cleaner environments, extend the cleaning interval as appropriate.
Dust Collection Box Cleaning:
- For banknote counters equipped with dust collection devices, regularly clean the dust box to prevent dust buildup, which can affect performance or even cause malfunctions.
- Check the sealing of the dust box to ensure no dust escapes. Replace sealing components if necessary.
Routine Component Inspections:
- Regularly inspect key components such as sensors, belts, and gears. Check for dust blockages, sensor damage, loose belts, or worn gears. Promptly repair or replace faulty parts to maintain optimal machine performance.
2. Professional Repairs and Calibration
Troubleshooting:
- For issues such as UV detection failure or inaccurate counting, professional technicians should be called to address the problems. Adjusting the UV sensitivity can sometimes resolve detection issues, but if not, replacing the UV lamp may be necessary. If the issue persists, a technician should inspect the machine.
- For counting inaccuracies, technicians can check the sensors, clean mechanical parts, and replace faulty components as needed.
Periodic Calibration:
- Regular professional calibration ensures that the banknote counter maintains optimal performance and accuracy. Adjust settings such as counterfeit detection sensitivity and counting error margins as necessary.
- Keep a record of calibration data to track performance trends and identify issues early. This data can guide future maintenance and improvements.
By implementing the above technical improvements and maintenance strategies, the counterfeit detection functionality of Indonesian banknote counters can be significantly enhanced, ensuring greater authenticity and security for banknotes.
