*** The principle of the discriminator function

The RMB discriminator can distinguish between true and false by detecting the inherent characteristics of the RMB and ensure a more orderly circulation of the RMB, which is of great significance for China's economic development. The renminbi identification instrument is generally composed of six parts, namely banknotes, banknotes, banknotes, racks, and electronic circuits. What is the principle of the recognition function?

The RMB identification instrument is a mechatronic product. The principle of different instrument discrimination is not the same. It can be broadly divided into fluorescence detection, magnetic detection, infrared penetration detection, laser detection, spectral image detection, multispectral detection, and digital quantitative qualitative analysis and detection. Wait.

1. The working principle of fluorescence detection: The paper is tested against the RMB. Using a UV light source to irradiate the banknote and using a silicon photocell to detect the fluorescence reflection of the banknote, it is possible to determine whether the banknote is genuine or not. Generally, counterfeit banknotes will emit fluorescent light under ultraviolet irradiation, while RMB real banknotes will not have fluorescent reaction.

2. The principle of magnetic detection: Using some parts of large denominations of real money is printed with magnetic ink, through a group of magnetic heads to detect the magneticity of moving notes, through the circuit to analyze the magnetic, can distinguish the true and false banknotes. First detect the presence or absence of magnetism in the renminbi, and then detect the magnetism by magnetic distribution. The fifth edition of the Renminbi wire magnetism and the renminbi cross number magnetism were tested.

3. The working principle of infrared penetration detection: The use of RMB paper is more solid, higher density and higher thickness of the ink printed by gravure printing technology, so the absorption of infrared signals is stronger to identify the true and false banknotes. The mathematical operation and comparative analysis of the infrared penetrating detection signal will result in accurate identification.

4. The principle of laser detection: The use of a certain wavelength of infrared laser irradiation on the fifth edition of the renminbi fluorescent word, will make the fluorescent word to produce a certain wavelength of laser light, through the detection of this laser can distinguish true and false banknotes. This kind of principle is highly accurate in phishing, because counterfeit currency copying is extremely difficult.

5. Spectral image detection principle: It means that the banknotes can be individually imaged, collected, analyzed, and recorded in one band or two (inclusive) or more bands to realize authenticity of the banknotes.

6. Multi-spectral detection principle: a light path system is formed by a multi-spectral light source and a lens array for emitting light and focusing reflected light on a renminbi onto an array of image sensor units, and a multi-spectral image sensor image analysis function is used to perform banknotes. Authentic identification.

7. Quantitative qualitative analysis of digital detection principle: the use of high-speed parallel AD conversion circuit, high-fidelity signal acquisition, quantitative analysis of ultraviolet light, can detect counterfeit banknotes with weak fluorescence reaction; quantitative analysis of the RMB magnetic ink; infrared ink Fixed-point analysis; using fuzzy mathematics theory, quantified some factors with unclear boundaries and quantification, and established a multi-level evaluation model for safety performance assessment to verify the authenticity of banknotes.