Surrounding type anti-counterfeiting bar code reading device and bar code reading method

Abstract

The invention relates to the field of bar code reading, in particular to a surrounding type anti-fake bar code reading device and a bar code reading method. Comprising a structural member, an induction module, an illumination module, an imaging module and a main control unit, the structural member is provided with an opening for an object with a fluorescent bar code to enter, each module and the main control unit are arranged on the structural member, the directions of the modules and the main control unit point to the opening, and the working range covers the area of the opening; and the main control unit is in communication connection with each module and controls the work of each module. According to the invention, when an object enters the opening, there is no position or angle adjustment requirement, and 360-degree blind-area-free reading and decoding can be realized. And the imaging module only allows the fluorescence emitted by the fluorescent bar code excited by the illumination light to penetrate, so that the reading efficiency of the fluorescent bar code is ensured. And the decoded data of the fluorescent bar codes in the excited state and the non-excited state are consistent, so that the fluorescent bar codes have an anti-counterfeiting function, and the fluorescent bar codes can be normally circulated and used in the market.

Description

Technical Field

[0001] The present invention relates to the field of barcode reading, and in particular to a surround type anti-counterfeiting barcode reading device and a barcode reading method. Background Art

[0002] Reverse vending machines (RVMs) are mainly used to recycle discarded beverage bottles. Its working principle is opposite to that of traditional vending machines. Consumers put empty cans or empty bottles into the machine, and the machine determines the type of bottle by scanning the barcode on the package and automatically classifies it. In return, the machine will provide points or money to consumers. There are generally two ways to scan codes in existing RVMs devices. One is rolling scanning, which rotates the beverage bottle through a motor or conveyor belt to ensure that the barcode rotates to the scanner for decoding. This motor solution has a stable structure, but requires a large space and high cost, and the single decoding time is long; the other is a ring arrangement of multiple scanners, which can save space and cost, but there are problems such as scanning blind spots, multi-scanner coordination, and lighting interference. Both scanning methods in the existing technology have the problem of low decoding efficiency. At the same time, because of refunds, there is a demand in the market for RVMs devices to support the reading of fluorescent barcodes with anti-counterfeiting functions. Summary of the invention

[0003] The present invention mainly solves the pain points of the two scanning methods of the RVMs device in the prior art, and adds the function of reading anti-counterfeiting fluorescent barcodes. The present invention provides a surround anti-counterfeiting barcode reading device and barcode reading method, which has 360° blind-zone reading in the entire channel opening, and effectively identifies fluorescent barcodes with anti-counterfeiting functions. At the same time, it can avoid the reflection and interference of lighting, ensuring that the moving barcode also has an efficient decoding success rate.

[0004] The technical solution of the present invention is as follows:

[0005] A wraparound anti-counterfeiting barcode reading device comprises: a structural part, a sensing module, a lighting module, an imaging module and a main control unit;

[0006] The structural member is provided with an opening for an object to enter, and the surface of the object has a readable fluorescent barcode; each module and the main control unit are arranged on the structural member, and the direction of each module is toward the opening;

[0007] The sensing module, whose sensing range covers an area within the opening, comprises: a transmitting component and a detecting component;

[0008] The illumination module has an illumination range covering an area within the opening, and the wavelength of the illumination light is within the excitation wavelength range of the fluorescent barcode;

[0009] The imaging module has a field of view covering an area within the opening, and the area where the fields of view of any two imaging modules intersect is larger than the size of the fluorescent barcode; it includes a decoding component, a lens component and a filter, the filter is arranged in front of the decoding component, and only allows the fluorescence emitted by the fluorescent barcode after being excited by the illumination light to pass through; the decoding component is provided with an image sensor and a decoding chip, and the lens component and the image sensor are coaxial in center;

[0010] The main control unit is connected to each module for communication and controls the operation of each module.

[0011] Furthermore, the fluorescent barcode in the non-excited state is visible to the naked eye, and the decoded data of the fluorescent barcode in the excited state and the non-excited state are consistent after decoding.

[0012] Furthermore, the decoding components are each provided with an independent pin connected to the main control unit, and the decoding components and the main control unit are connected on a bus.

[0013] Furthermore, a first diffusion sheet is arranged at the front of the lighting module;

[0014] The lighting module includes first lamps and a first lamp board. The first lamps are evenly arranged on the first lamp board. The interval between the first lamps is d1. The interval needs to meet

[0015] Wherein, h1 is the distance from the light-emitting surface of the first lamp to the first diffuser, It is the half angle of 50% light intensity angle.

[0016] Furthermore, a status light module is arranged at the front of the structural member, and a second diffuser is arranged at the front of the status light module; the main control unit sends a working signal to the status light module, and transmits an indication of successful decoding through the second light of the status light module;

[0017] The status light module includes a second light and a second light board. The second lights are evenly arranged on the second light board. The interval between the second lights is d2. The interval needs to meet

[0018] Wherein, h2 is the distance from the light-emitting surface of the second lamp to the second diffuser, It is the half angle of 50% light intensity angle.

[0019] Furthermore, the first diffuser is white or milky white, the second diffuser is white or milky white, the light emitting surfaces of both diffusers have an arc-shaped structure, the haze Hz>88%, and the transmittance Tt>80%.

[0020] Furthermore, the image sensor is a global open-door CMOS sensor; the aperture of the lens assembly is F.No<2.5; and the filter is a bandpass filter.

[0021] Furthermore, there are at least two lighting modules, the imaging module is located between the lighting modules, and the lighting range of the lighting module is larger than the field of view range of any imaging module.

[0022] Furthermore, the cylinder is arranged on the inner wall of the opening of the structural member and is made of a light-transmitting material with a hardness of ≥6H.

[0023] A wraparound anti-counterfeiting barcode reading method, the above device performs the following steps:

[0024] S1, the transmitting component of the sensing module transmits a first optical signal, the detecting component receives a second optical signal fed back, converts the second optical signal into an electrical signal, transmits the electrical signal to the control unit, and the control unit converts the electrical signal into a voltage value;

[0025] S2, the surface of the object has a readable fluorescent barcode, the fluorescent barcode is visible to the naked eye in an unexcited state, and the decoded data of the fluorescent barcode in an excited state and an unexcited state are consistent; when the object enters the sensing area in the opening of the structural member, the second light signal received by the detection component will change, causing the voltage value to deviate from the set threshold range, and it is judged that an object has entered;

[0026] S3, the control unit sends a working signal to the illumination module and the imaging module, and the fluorescent barcode emits fluorescence after being excited by the illumination light;

[0027] S4, the fluorescence passes through the filter and the lens assembly to reach the decoding assembly, the decoding assembly captures the image and decodes it, and transmits the decoded data to the main control unit.

[0028] The present invention has the following beneficial effects:

[0029] 1. The present invention discloses a surround anti-counterfeiting barcode reading device and barcode reading method, in which the working sensing range of each module covers an open area, eliminating the need to adjust the position or angle when an object enters, ensuring that no matter what posture the object enters the detection area, 360° blind-zone-free reading and decoding can be achieved. A filter is set in front of the lens to only allow the fluorescence emitted by the fluorescent barcode after being excited by the illumination light to pass through, so that the illumination light, the reflected light of the fluorescent barcode background color, the stray light of the environment and other light that interferes with the identification cannot pass through, thereby ensuring the reading efficiency of the fluorescent barcode.

[0030] 2. The wraparound anti-counterfeiting barcode reading device and barcode reading method described in the present invention provide consistent decoded data for fluorescent barcodes in an excited state and an unexcited state, which not only makes the fluorescent barcode anti-counterfeiting function, but also ensures that the fluorescent barcode can be circulated and used normally in the market. The fluorescent barcode in an unexcited state is visible to the naked eye, that is, it is visible in the living environment, and can be decoded by ordinary reading devices, but the reading device of the present invention cannot decode it; when the fluorescent barcode is excited by the illumination light and emits fluorescence, that is, the fluorescent barcode is in an excited state, the reading device of the present invention only decodes the fluorescent image excited by the fluorescent barcode.

[0031] 3. In the wraparound anti-counterfeiting barcode reading device and barcode reading method described in the present invention, the pin is used to transmit the information after the decoding component completes the decoding to the main control unit, so that the main control unit can find the module that has been successfully decoded one-to-one as quickly as possible, without the need to perform polling queries every certain period of time, speeding up the reading process, thereby avoiding the time delay caused by the traditional polling query method. In addition, the computing burden of the main control unit is also reduced. There is no need to continuously send query commands and process a large amount of feedback information, but it can directly receive data from the module that has been successfully decoded. This not only optimizes the use of system resources, but also reduces system delays and error rates that may be caused by polling queries.

[0032] 4. In the surround anti-counterfeiting barcode reading device and barcode reading method described in the present invention, the interval between the first lamps is d1, and the interval between the second lamps is d2, both of which make the light spot illumination range on the diffuser sufficient and the transition uniform, while ensuring that the overall luminous flux meets the use requirements.

[0033] 5. In the wraparound anti-counterfeiting barcode reading device and barcode reading method described in the present invention, the first diffuser and the second diffuser are made of white or milky white high-fog and high-transmittance materials. The illumination light is evenly transmitted after multiple refractions and scattering inside the diffuser, which can effectively avoid local over-bright reflections and improve the decoding success rate. The light-emitting surfaces of the first diffuser and the second diffuser are designed in an arc shape, which can take into account the illumination light intensity of the fluorescent barcode at a close distance or a long distance from the inner wall of the structural member.

[0034] 6. The surround anti-counterfeiting barcode reading device and barcode reading method described in the present invention adopts a global open-door CMOS sensor, which has good sensitivity in the wavelength band of the light emitted by the fluorescent barcode after being excited, ensuring that the sensor can effectively capture the light signal of the high-speed moving barcode, thereby greatly improving the success rate of code reading. The large aperture lens with an aperture of F.No<2.5 in the lens assembly can have a high transmittance in the wavelength band of the light emitted by the fluorescent barcode after being excited, which can improve the success rate of fluorescent barcode decoding at high speed and improve the efficiency of object recovery.

[0035] 7. In the surround anti-counterfeiting barcode reading device and barcode reading method described in the present invention, the imaging module is located between the lighting modules, which produces uniform lighting light, and can effectively avoid the phenomenon of local over-brightness on the barcode, thereby reducing the occurrence of reflection problems. This not only helps to reduce barcode recognition errors caused by uneven lighting, but also improves image quality, making the details of the barcode clearer.

[0036] 8. The encircling anti-counterfeiting barcode reading device and barcode reading method described in the present invention, the cylinder is made of a light-transmitting material, which can transmit the light reflected by each module and the fluorescent barcode, isolate the internal components of the device from the external environment, and play a role in waterproofing and dustproofing. The cylindrical cavity inside the cylinder is the sensing area, which needs to be in frequent contact with the object to be tested, and can be used stably with a hardness of more than 6H.

[0037] 9. The design concept of the lighting module of the surround anti-counterfeiting barcode reading device and barcode reading method described in the present invention is not to adopt the traditional constant light mode, but to start working during the decoding process, which not only reduces energy consumption and prolongs the service life of the module, but also improves the operating efficiency of the overall system. In this way, the lighting module remains closed when lighting is not needed, and only plays a role at critical moments, achieving the optimal allocation of resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 It is a structural schematic diagram of the present invention;

[0039] Figure 2 It is a cross-sectional schematic diagram of the present invention;

[0040] Figure 3 It is a cross-sectional schematic diagram of the present invention, and a partial enlarged diagram of the imaging module and the status light module;

[0041] Figure 4 It is a working schematic diagram of the present invention.

[0042] The accompanying drawings are marked as follows: 100-structural part; 110-opening; 120-cylinder; 200-sensing module; 210-emitting component; 220-detection component; 300-illumination module; 310-first lamp; 320-first lamp board; 330-first diffuser; 400-imaging module; 410-decoding component; 411-pin; 420-lens assembly; 430-filter; 500-main control unit; 600-object; 700-fluorescent barcode; 800-status light module; 810-second lamp; 820-second lamp board; 830-second diffuser. DETAILED DESCRIPTION

[0043] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0044] like Figure 1-4 As shown, a surround anti-counterfeiting barcode reading device and a barcode reading method include a structural member 100, a sensing module 200, a lighting module 300, an imaging module 400 and a main control unit 500.

[0045] The structural member 100 is provided with an opening 110 for an object 600 to enter, and a readable fluorescent barcode 700 is provided on the surface of the object 600; each module and the main control unit 500 are arranged on the structural member 100, and each module is oriented toward the opening 110.

[0046] The sensing module 200 has a sensing range covering an area within the opening 110 , and includes a transmitting component 210 and a detecting component 220 .

[0047] The illumination range of the illumination module 300 covers an area within the opening 110 , and the wavelength of the illumination light is within the excitation wavelength range of the fluorescent barcode 700 .

[0048] The imaging module 400 has a field of view covering an area within the opening 110, and the area where the fields of view of any two imaging modules 400 intersect is larger than the size of the fluorescent barcode 700; it includes a decoding component 410, a lens component 420 and a filter 430, and the filter 430 is arranged in front of the decoding component 410 to only allow the fluorescence emitted by the fluorescent barcode 700 after being excited by the illumination light to pass through; the decoding component 410 is provided with an image sensor and a decoding chip, and the lens component 420 is coaxial with the image sensor.

[0049] The main control unit 500 is connected to each module for communication and controls the operation of each module.

[0050] The working sensing range of each module covers an area of ​​an opening 110, eliminating the need to adjust the position or angle of the object 600 when it enters, ensuring that no matter what posture the object 600 enters the detection area, 360° blind spot-free reading and decoding can be achieved. A filter 430 is set in front of the lens to only allow the fluorescence emitted by the fluorescent barcode 700 after being excited by the illumination light to pass through, so that the illumination light, the reflected light of the background color of the fluorescent barcode 700, the stray light of the environment and other light that interferes with the identification cannot pass through, thereby ensuring the reading efficiency of the fluorescent barcode 700.

[0051] The fluorescent barcode 700 is visible to the naked eye in the unexcited state, and the decoded data of the fluorescent barcode 700 in the excited state and the unexcited state are consistent after decoding. Not only does it make the fluorescent barcode 700 have an anti-counterfeiting function, but it also ensures that the fluorescent barcode 700 can be circulated and used normally on the market. The fluorescent barcode 700 is visible to the naked eye in the unexcited state, that is, it is visible in the living environment and can be decoded by ordinary reading devices, but the reading device of the present invention cannot decode it; when the fluorescent barcode 700 is excited by the illumination light and emits fluorescence, that is, the fluorescent barcode 700 is in the excited state, the reading device of the present invention only decodes the fluorescent image excited by the fluorescent barcode 700.

[0052] The decoding components 410 are all provided with independent pins 411, which are connected to the main control unit 500, and the decoding components 410 and the main control unit 500 are connected on a bus. Pin 411 is used for the decoding component 410 to transmit the information after decoding to the main control unit 500, so that the main control unit can find the module that has been successfully decoded one-to-one as quickly as possible, without the need to perform polling queries every once in a while, speeding up the reading process, thereby avoiding the time delay caused by the traditional polling query method. In addition, the computing burden of the main control unit 500 is also reduced. There is no need to continuously send query commands and process a large amount of feedback information, but it can directly receive data from the module that has been successfully decoded. This not only optimizes the use of system resources, but also reduces the system delay and error rate that may be caused by polling queries.

[0053] The first diffusion sheet 330 is disposed at the front of the lighting module 300 .

[0054] The lighting module 300 includes first lamps 310 and a first lamp board 320. The first lamps 310 are evenly arranged on the first lamp board 320. The interval between the first lamps 310 is d1. The interval needs to meet Wherein, h1 is the distance from the light-emitting surface of the first lamp 310 to the first diffusion sheet 330, It is the half angle of 50% light intensity angle.

[0055] The status light module 800 is arranged in front of the structural member 100, and the second diffusion sheet 830 is arranged in front of the status light module 800; the main control unit 500 sends a working signal to the status light module 800, and transmits an indication of successful decoding through the second light 810 of the status light module 800.

[0056] The state light module 800 includes a second light 810 and a second light board (820). The second lights 810 are evenly arranged on the second light board (820). The interval between the second lights 810 is d2. The interval needs to meet Wherein, h2 is the distance from the light-emitting surface of the second lamp 810 to the second diffusion sheet 830, It is the half angle of 50% light intensity angle.

[0057] The first diffuser 330 is white or milky white, and the second diffuser 830 is white or milky white. The light-emitting surfaces of both have an arc-shaped structure, with a haze Hz>88% and a transmittance Tt>80%. The illumination light of this design is evenly transmitted after multiple refractions and scattering inside the diffuser, which can effectively avoid local over-bright reflections and improve the decoding success rate. The light-emitting surfaces of the first diffuser 330 and the second diffuser 830 are designed in an arc shape, which can take into account the illumination light intensity of the fluorescent barcode 700 at a close distance or a long distance from the inner wall of the structural member 100.

[0058] The interval d1 between the first lamps 310 and the interval d2 between the second lamps 810 both ensure that the light spot illumination range on the diffuser is sufficient and the transition is uniform, while ensuring that the overall luminous flux meets the use requirements.

[0059] The image sensor is a global open-door CMOS sensor, which has good sensitivity in the wavelength band of the light emitted by the fluorescent barcode 700 after being excited, ensuring that the sensor can effectively capture the light signal of the high-speed moving barcode, thereby greatly improving the success rate of code reading. With the aperture of the lens assembly 420 being F.No<2.5, it can have a high transmittance in the wavelength band of the light emitted by the fluorescent barcode 700 after being excited, which can improve the decoding success rate of the fluorescent barcode 700 when moving at high speed and improve the recovery efficiency of the object 600. The filter 430 is a bandpass filter.

[0060] There are at least two illumination modules 300, and the imaging module 400 is located between the illumination modules 300. The illumination range of the illumination module 300 is larger than the field of view of any imaging module 400. This design can produce uniform illumination light, effectively avoid the phenomenon of partial over-brightness on the barcode, thereby reducing the occurrence of reflection problems, which not only helps to reduce barcode recognition errors caused by uneven illumination, but also improves image quality, making the details of the barcode clearer.

[0061] The cylinder 120 is arranged on the inner wall of the opening 110 of the structural member 100 and is made of a light-transmitting material with a hardness of ≥6H. It can transmit the light reflected by each module and the fluorescent barcode 700, isolate the internal components of the device from the external environment, and play a role in waterproofing and dustproofing. The cylindrical cavity inside the cylinder is the sensing area, which needs to be in frequent contact with the object to be tested 600, and can be used stably with a hardness of more than 6H.

[0062] The above apparatus is configured to perform the following steps:

[0063] S1, the transmitting component 210 of the sensing module 200 transmits a first optical signal, the detecting component 220 receives a second optical signal fed back, converts the second optical signal into an electrical signal, transmits the electrical signal to the control unit, and the control unit converts the electrical signal into a voltage value;

[0064] S2, the surface of the object 600 has a readable fluorescent barcode 700, the fluorescent barcode 700 is visible to the naked eye in the unexcited state, and the decoded data of the fluorescent barcode 700 in the excited state and the unexcited state are consistent; when the object 600 enters the sensing area in the opening 110 of the structural member 100, the second light signal received by the detection component 220 will change, causing the voltage value to deviate from the set threshold range, and it is determined that the object 600 has entered;

[0065] S3, the control unit sends a working signal to the illumination module 300 and the imaging module 400, and the fluorescent barcode 700 emits fluorescence after being excited by the illumination light;

[0066] S4, the fluorescence passes through the filter 430 and the lens assembly 420 to reach the decoding assembly 410, and is captured and decoded by the decoding assembly 410, and the decoded data is transmitted to the main control unit 500.

[0067] The parameters of each embodiment are shown in the following table:

[0068]

[0069]

[0070] This embodiment is the specific parameters of different optical parameters under the structure of the patent solution. Under different structural solutions, the parameters can also achieve similar effects.

[0071] The above descriptions are only embodiments of the present invention. The selection of the embodiments is only for a better understanding of the invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A wraparound anti-counterfeiting barcode reading device, characterized in that: include: Structural component (100), sensing module (200), lighting module (300), imaging module (400) and main control unit (500); The structural member (100) is provided with an opening (110) for an object (600) to enter, and a readable fluorescent barcode (700) is provided on the surface of the object (600); each module and the main control unit (500) are arranged on the structural member (100), and each module is oriented toward the opening (110); The sensing module (200) has a sensing range covering an area within the opening (110), and comprises: a transmitting component (210) and a detecting component (220); The illumination module (300) has an illumination range covering an area within the opening (110), and the wavelength of the illumination light is within the range of the excitation wavelength band of the fluorescent barcode (700); The imaging module (400) has a field of view covering an area within the opening (110), and the area where the fields of view of any two imaging modules (400) intersect is larger than the size of the fluorescent barcode (700); it comprises a decoding component (410), a lens component (420) and a filter (430), wherein the filter (430) is arranged in front of the decoding component (410) and only allows the fluorescence emitted by the fluorescent barcode (700) after being excited by the illumination light to pass through; the decoding component (410) is provided with an image sensor and a decoding chip, and the lens component (420) and the image sensor are coaxial in center; The main control unit (500) is connected to each module for communication and controls the operation of each module.

2. A wraparound anti-counterfeiting barcode reading device according to claim 1, characterized in that: The fluorescent barcode (700) is visible to the naked eye in a non-excited state, and the decoded data of the fluorescent barcode (700) in an excited state and a non-excited state are consistent after being decoded.

3. The wraparound anti-counterfeiting barcode reading device according to claim 1, characterized in that: The decoding components (410) are each provided with an independent pin (411) connected to the main control unit (500), and the decoding components (410) and the main control unit (500) are connected on a bus.

4. The wraparound anti-counterfeiting barcode reading device according to claim 1, characterized in that: A first diffusion sheet (330) is arranged at the front of the lighting module (300); The lighting module (300) comprises first lamps (310) and a first lamp board (320), wherein the first lamps (310) are evenly arranged on the first lamp board (320), and the interval between the first lamps (310) is d1, and the interval needs to satisfy Wherein, h1 is the distance from the light-emitting surface of the first lamp (310) to the first diffusion sheet (330), It is the half angle of 50% light intensity angle.

5. The wraparound anti-counterfeiting barcode reading device according to claim 1, characterized in that: The status light module (800) is arranged at the front of the structural component (100), and the second diffusion sheet (830) is arranged at the front of the status light module (800); the main control unit (500) sends a working signal to the status light module (800), and transmits an indication of successful decoding through the second light (810) of the status light module (800); The status light module (800) comprises second lights (810) and a second light board (820), wherein the second lights (810) are evenly arranged on the second light board (820), and the interval between the second lights (810) is d2, and the interval needs to satisfy Wherein, h2 is the distance from the light-emitting surface of the second lamp (810) to the second diffusion sheet (830), It is the half angle of 50% light intensity angle.

6. A wraparound anti-counterfeiting barcode reading device according to any one of claims 4 or 5, characterized in that: The first diffuser (330) is white or milky white, and the second diffuser (830) is white or milky white. The light-emitting surfaces of both diffusers have an arc-shaped structure, and the haze Hz is greater than 88%, and the transmittance Tt is greater than 80%.

7. The wraparound anti-counterfeiting barcode reading device according to claim 1, characterized in that: The image sensor is a global open-door CMOS sensor; the aperture of the lens assembly (420) is F.No<2.5; and the filter (430) is a bandpass filter.

8. The wraparound anti-counterfeiting barcode reading device according to claim 1, characterized in that: There are at least two illumination modules (300), the imaging module (400) is located between the illumination modules (300), and the illumination range of the illumination module (300) is greater than the field of view range of any imaging module (400).

9. The wraparound anti-counterfeiting barcode reading device according to claim 1, characterized in that: The cylinder (120) is arranged on the inner wall of the opening (110) of the structural member (100) and is made of a light-transmitting material with a hardness of ≥6H.

10. A wraparound anti-counterfeiting barcode reading method, characterized in that: The device of claim 1, performing the following steps: S1, the transmitting component (210) of the sensing module (200) transmits a first optical signal, the detecting component (220) receives a second optical signal fed back, converts the second optical signal into an electrical signal, transmits the electrical signal to a control unit, and the control unit converts the electrical signal into a voltage value; S2, a readable fluorescent barcode (700) is present on the surface of the object (600), the fluorescent barcode (700) is visible to the naked eye in an unexcited state, and decoded data of the fluorescent barcode (700) in an excited state and in an unexcited state are consistent after decoding; When the object (600) enters the sensing area in the opening (110) of the structural member (100), the second optical signal received by the detection component (220) changes, causing the voltage value to deviate from the set threshold range, and it is determined that the object (600) has entered; S3, the control unit sends a working signal to the illumination module (300) and the imaging module (400), and the fluorescent barcode (700) emits fluorescence after being stimulated by the illumination light; S4, the fluorescence passes through the filter (430) and the lens assembly (420) to reach the decoding assembly (410), the decoding assembly (410) captures the image and decodes it, and transmits the decoded data to the main control unit (500).

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