Fluorescent secret mark module
By designing a fluorescent dark marking module including UV lamps, photodiodes and filter glass, the problem that existing banknote detectors are prone to false alarms when identifying banknotes, and more accurate banknote identification is achieved.
Patent Information
- Application Number
- CN202421369869.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-14
- Publication Date
- 2025-05-13
- Estimated Expiration
- 2034-06-14
AI Technical Summary
Existing banknote detection machines are prone to false alarms when identifying banknotes under ultraviolet irradiation, and the identification is inaccurate.
A fluorescent dark marking module is designed, including substrate, dam, UV lamp, photodiode and filter glass. It emits ultraviolet rays through the UV lamp to excite colorless fluorescent ink. The photodiode receives and amplifies light signals of a specific wavelength, and determines the authenticity of the ink through the amplification circuit.
It improves the accuracy of banknote identification, reduces false positives, and ensures the reliability of identification results.
Smart Images
Figure CN222867123U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of fluorescent dark marking modules, in particular to a fluorescent dark marking module. Background Art
[0002] At present, most financial service institutions use rolling banknote detectors to verify and count banknotes. A banknote detector is a machine that verifies the authenticity of banknotes and counts the number of banknotes. During the existing banknote verification, ultraviolet rays are often used to irradiate banknotes, and the banknote hidden marks are directly displayed with the help of ultraviolet rays. This is prone to false alarms and inaccurate recognition. For this reason, we propose a fluorescent hidden mark module. Utility Model Content
[0003] The main purpose of the utility model is to provide a fluorescent marking module, which can effectively solve the problems in the background technology.
[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is:
[0005] A fluorescent marking module comprises a substrate, the upper surface of the substrate is fixedly connected with a dam, the interior of the dam is sequentially provided with UV lamps and photodiodes from front to back, and the upper surface of the dam is fixedly connected with a filter glass.
[0006] Preferably, the substrate is made of aluminum with a thermal conductivity of 2.0 W / MK and is a double-sided board.
[0007] Preferably, as a fluorescent marking module of the utility model, the height of the dam is 1.2 mm±0.05 mm.
[0008] Preferably, as a fluorescent marking module of the utility model, the light transmittance of the filter glass is 360-600nm≥92%, and the bandpass filtering is 605±10nm.
[0009] Compared with the prior art, the utility model has the following beneficial effects:
[0010] 1. The fluorescent marking module emits ultraviolet rays through 4 365nm UV lamps. The ultraviolet rays stimulate the colorless fluorescent ink to produce brighter light than other parts of the banknote. The receiving part on the other side of the module is composed of 8 photodiodes. Because the photodiode receives a wide range of light in the range of 300-1100nm, a bandpass filter glass should be installed in front of the photodiode to pass only 595-615nm light. The light that reaches the photodiode after passing through the glass is the light we want to receive. Finally, it is amplified by the amplifier circuit. According to the light intensity and area size received by the photodiode, the authenticity of the printed colorless fluorescent ink can be determined, and the banknote identification is more accurate. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] Figure 1 This is a schematic diagram of the structure of a fluorescent marking module according to Embodiment 1 of the present utility model;
[0012] Figure 2 This is a schematic diagram of the top view of a fluorescent dark marking module according to Embodiment 1 of the utility model;
[0013] Figure 3 This is a front view structural diagram of a fluorescent dark marking module according to Embodiment 1 of the utility model;
[0014] Figure 4 This is a rear view structural schematic diagram of a fluorescent dark marking module according to Embodiment 1 of the present utility model;
[0015] Figure 5 This is a schematic diagram of the structure of a filter glass in a fluorescent marking module according to Example 1 of the utility model.
[0016] In the figure: 1. substrate; 2. dam; 3. UV lamp; 4. photodiode; 5. filter glass. DETAILED DESCRIPTION
[0017] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0018] Example 1
[0019] like Figure 1-5 As shown, a fluorescent marking module includes a substrate 1, a dam 2 is fixedly connected to the upper surface of the substrate 1, a UV lamp 3 and a photodiode 4 are arranged in sequence inside the dam 2 from front to back, a filter glass 5 is fixedly connected to the upper surface of the dam 2, the substrate 1 is made of aluminum, the thermal conductivity is 2.0W / MK, and it is a double-sided board, the height of the dam 2 is 1.2mm±0.05mm, the transmittance of the filter glass 5 is 360-600nm≥92%, and the bandpass filtering is 605±10nm.
[0020] When in use, ultraviolet rays are emitted by four 365nm UV lamps 3. The ultraviolet rays are irradiated on the colorless fluorescent ink to stimulate light, and the stimulated bright light is stronger than other positions on the banknote. The receiving side of the module on the same side is composed of eight photodiodes 4. Because the photodiode 4 receives a wide range of light in the range of 300 to 1100nm, a bandpass filter glass 5 is installed in front of the photodiode 4, which can only pass 595 to 615nm light. The light that passes through the glass reaches the photodiode 4, and the stimulated light is what we want to receive. Finally, it is amplified by the amplifier circuit, and the authenticity of the printed colorless fluorescent ink can be determined according to the light intensity and area size received by the photodiode 4.
[0021] Working principle: 4 365nm UV lamps 3 emit ultraviolet rays, which stimulate the colorless fluorescent ink to produce brighter light than other parts of the banknote. The other side of the module receives 8 photodiodes 4. Because the photodiode 4 receives a wide range of light in the range of 300-1100nm, a bandpass filter glass 5 should be installed in front of the photodiode 4, which can only pass 595-615nm light. The light that passes through the glass reaches the photodiode 4, and the stimulated light is what we want to receive. Finally, it is amplified by the amplifier circuit, and the authenticity of the printed colorless fluorescent ink can be determined according to the light intensity and area size received by the photodiode 4.
[0022] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.
Claims
1. A fluorescent marking module, comprising a substrate (1), characterized in that: The upper surface of the substrate (1) is fixedly connected to a dam (2), the interior of the dam (2) is provided with a UV lamp (3) and a photodiode (4) in sequence from front to back, the upper surface of the dam (2) is fixedly connected to a filter glass (5), the substrate (1) is made of aluminum, has a thermal conductivity of 2.0 W / MK, and is a double-sided board, the light transmittance of the filter glass (5) is 360-600 nm ≥ 92%, and the bandpass filtering is 605 ± 10 nm.
2. A fluorescent marking module according to claim 1, characterized in that: The height of the dam (2) is 1.2 mm±0.05 mm.