A convenient household aflatoxin detection device and usage method

Abstract

The present invention relates to the technical field of food detection devices and methods, and in particular to a device and method for using a convenient household aflatoxin detection device, comprising a handheld outer cylinder, a taste and olfactory detection component, an optical detection component, an airflow mechanism, and a signal processing and control component. The interior of the outer cylinder is coaxially connected to an air collecting tube. The taste and olfactory detection component comprises a taste sensor array installed at the lower end of the air collecting tube and an olfactory sensor array located at the upper end of the taste sensor array. The optical detection component comprises a color sensor, an irradiation lamp, and an AI image recognition sensor located in the taste sensor array, which are used to work together to obtain the color and image features of food. The present invention detects food from multiple dimensions through the cooperation of the taste sensor array and the olfactory sensor array, thereby improving the accuracy of the detection results. The device is also easy to carry and use in different scenarios, making it more convenient.

Description

Technical Field

[0001] The present invention relates to the technical field of food detection devices and methods, and in particular to a convenient household aflatoxin detection device and a method for use. Background Art

[0002] Aflatoxins are toxic metabolites produced by fungi such as Aspergillus flavus and Aspergillus parasiticus. They are extremely toxic. Aflatoxin B is classified as a carcinogen by the International Agency for Research on Cancer. Aflatoxins are usually easily produced in warm and humid places. They will multiply in large quantities in the temperature range of 28℃ to 38℃, and grow fastest at around 33℃. Aflatoxins are commonly found in food, especially those rich in starch and oil, such as peanuts, corn, rice, beans, nuts, etc., and household kitchen utensils such as chopsticks and cutting boards.

[0003] Currently, the detection methods for aflatoxins include enzyme-linked immunosorbent assay, fluorescence spectrophotometry, capillary electrophoresis, thin-layer analysis, immunoaffinity column combined with fluorescence spectrophotometry, and rapid test instruments. Among them, enzyme-linked immunosorbent assay and rapid test instruments are suitable for rapid detection, but enzyme-linked immunosorbent assay may have false positives, the test kit needs to be stored at low temperatures, the repeatability is poor, and the rapid test instrument equipment is expensive. Other methods are suitable for laboratory testing. Currently, there is no device that is generally suitable for use by non-professional testers such as families or general business operators and can detect aflatoxins relatively conveniently.

[0004] Based on the above situation, we propose a convenient home-use aflatoxin detection device to solve the above problems. Summary of the Invention

[0005] The present invention provides a device and a method for using the device for conveniently detecting aflatoxin at home, so as to solve the problem in the prior art that it is not convenient for non-professional testers such as households or general business operators to perform convenient and rapid detection of aflatoxin.

[0006] The technical problem solved by the present invention is achieved by adopting the following technical solutions:

[0007] A convenient household aflatoxin detection device comprises a handheld outer cylinder, a taste and smell detection component, an optical detection component, an air flow mechanism, and a signal processing and control component. The outer cylinder is coaxially connected to an air collection cylinder. The taste and smell detection component comprises a taste sensor array mounted at the lower end of the air collection cylinder and an olfactory sensor array located at the upper end of the taste sensor array. The optical detection component comprises a color sensor, an irradiation lamp, and an AI image recognition sensor located at the taste sensor array, which are used to work together to obtain food color and image features. The air flow mechanism comprises an air flow drive connected to the upper end of the air collection cylinder. The invention relates to a driving component and an air outlet pipe provided on the air collecting cylinder, wherein the output end of the air outlet pipe extends to the outside of the outer cylinder body, and is used to drive the air to be discharged from the air outlet pipe. The signal processing and control component includes a signal acquisition and pattern recognition module electrically connected to the taste sensor array, a signal processing and pattern recognition module electrically connected to the olfactory sensor array, and a PLC display controller electrically connected to the taste and olfactory detection component and the optical detection component. The PLC display controller also stores typical characteristic photos of aflatoxin, olfactory and taste characteristic curves, and is used to compare and analyze the received aflatoxin information data with the stored information data.

[0008] Preferably, the signal acquisition and pattern recognition module amplifies, screens, identifies the taste signal and transmits the characteristic taste curve to the PLC display controller, and the signal processing and pattern recognition module amplifies, screens, processes, identifies the odor signal and transmits the characteristic odor curve to the PLC display controller.

[0009] Preferably, the air concentrator includes a conical portion located at the lower end of the outer cylinder and a straight cylinder portion integrally connected to the conical portion, the olfactory sensor array is connected to the straight cylinder portion through a first bracket, and ventilation channels for ventilation are evenly distributed between the olfactory sensor array and the inner wall of the straight cylinder portion.

[0010] Preferably, the taste sensor array is connected to the tapered portion via a second bracket, and the lower end surface of the taste sensor array is higher than the lower end surface of the outer cylinder, so as to contact the food to detect taste information.

[0011] Preferably, the airflow drive assembly includes a servo motor and a wind fin connected to the output shaft of the servo motor, the servo motor is connected to the inner wall of the straight cylinder portion through a third bracket, and the wind fin is located directly above the olfactory sensor array.

[0012] Preferably, a pair of air inlet arcs are provided at the lower end of the outer cylinder, a support leg is provided between two adjacent air inlet arcs, and an air inlet hole is provided at a portion between the support leg and the air collecting tube on the outer cylinder.

[0013] Preferably, the illumination lamp can emit at least two different colors of light to cooperate with the color sensor and AI image recognition sensor to collect information required for different detections.

[0014] Preferably, it also includes a warning device electrically connected to the PLC display controller, and the warning device is used to issue sound and light warnings when the detected aflatoxin exceeds a set threshold.

[0015] A method for using a convenient home aflatoxin detection device, based on the above-mentioned convenient home aflatoxin detection device, comprises the following steps:

[0016] S1: Place the outer cylinder on the food to be tested, and ensure that the food is not higher than the air inlet;

[0017] S2: When the PLC display controller controls the lighting to emit different colors, the color sensor and AI image recognition sensor send the fluorescent characteristic colors of possible aflatoxin and the observed food properties, including the fluorescent parts and shapes, to the PLC display controller in real time;

[0018] S3: The taste sensor array contacts the food and transmits the food taste information to the signal acquisition and pattern recognition module. After amplification, screening and identification, the characteristic taste curve of aflatoxin is transmitted to the PLC display controller. The airflow drive component transmits the food odor to the olfactory sensor array, and then transmits the odor information to the signal processing and pattern recognition module. After amplification, screening, processing and identification, the characteristic musty odor intensity curve of Aspergillus flavus is transmitted to the PLC display controller.

[0019] S4: The PLC display controller compares and analyzes the received information with the stored data to determine whether aflatoxin is detected and gives corresponding prompts.

[0020] The beneficial effects of the present invention are as follows: the handheld outer cylinder can be easily carried to different scenarios for use, which is more convenient; the taste sensor array can capture the characteristic bitter taste brought by aflatoxin, the olfactory sensor array can identify the characteristic musty smell of aflatoxin, the color sensor and the AI ​​image recognition sensor can detect food color changes, colony morphology and possible aflatoxin red fluorescence, multiple detection methods corroborate each other, and food is detected from multiple dimensions to improve the accuracy of the test results; the signal acquisition and pattern recognition module and the signal processing and pattern recognition module can quickly process and analyze the signal, and quickly complete data comparison and calculation through the PLC display controller, so that the test results can be obtained in a short time, saving users waiting time and improving detection efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0022] Figure 1 A schematic diagram of the isometric structure provided by the present invention;

[0023] Figure 2 The cross-sectional structure provided by the present invention is schematically shown Figure 1 ;

[0024] Figure 3 The cross-sectional structure provided by the present invention is schematically shown Figure 2 ;

[0025] Figure 4 This is a schematic diagram of the bottom-view structure provided in the present invention;

[0026] Figure 5 The electronic control principle provided in the present invention Figure 1 ;

[0027] Figure 6 The electronic control principle provided in the present invention Figure 2 .

[0028] In the figure, 1. outer cylinder; 2. air concentrator; 3. taste sensor array; 4. olfactory sensor array; 5. color sensor; 6. illumination lamp; 7. AI image recognition sensor; 8. air outlet duct; 9. signal acquisition and pattern recognition module; 10. signal processing and pattern recognition module; 11. PLC display controller; 12. conical part; 13. straight cylinder part; 14. first bracket; 15. ventilation channel; 16. second bracket; 17. servo motor; 18. fan wing; 19. third bracket; 20. air inlet arc; 21. support leg; 22. air inlet hole; 23. warning device. DETAILED DESCRIPTION

[0029] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below with reference to specific illustrations.

[0030] Reference Figures 1-6As shown, a device for conveniently detecting aflatoxin at home includes an outer cylinder 1. The outer cylinder 1 can be cylindrical and easy to hold with one hand. An air collecting cylinder 2 is coaxially arranged inside the outer cylinder 1. A taste and smell detection component is installed in the air collecting cylinder 2. The taste and smell detection component includes a taste sensor array 3 installed at the lower end of the air collecting cylinder 2 and an olfactory sensor array 4 located at the upper end of the taste sensor array 3, and also includes an optical detection component and a signal processing and control component. The optical detection component includes a color sensor 5, an irradiation lamp 6 and an AI image sensor located in the taste sensor array 3. The identification sensor 7 is used to work together to obtain the color and image characteristics of the food. The signal processing and control component includes a signal acquisition and pattern recognition module 9 electrically connected to the taste sensor array 3, a signal processing and pattern recognition module 10 electrically connected to the olfactory sensor array 4, and a PLC display controller 11 electrically connected to the taste and olfactory detection component and the optical detection component. The PLC display controller 11 also stores typical characteristic photos of aflatoxin and olfactory and taste characteristic curves, and is used to compare and analyze the received aflatoxin information data with the stored information data;

[0031] Specifically, when in use, the outer cylinder 1 is placed on the food to be tested, and the perceived taste and smell of the food are transmitted to the signal acquisition and pattern recognition module 9 and the signal processing and pattern recognition module 10 respectively through the taste sensor array 3 and the olfactory sensor array 4. Since aflatoxin itself is colorless, it is a colorless chemical substance. However, the Aspergillus flavus that produces aflatoxin is a light yellow mold. Under white light, light yellow mold spots can be seen on the surface of contaminated food. The initial colony is white, the middle stage is gray, the colony is black after maturity, and finally turns light yellow, which is the color of Aspergillus flavus. In particular, aflatoxin will also show red fluorescence under purple light. Therefore, the PLC display controller 11 can preferably control the irradiation lamp 6 to emit white light or purple light, at least two different colors of light, etc., to cooperate with the color sensor 5 and the AI ​​image recognition sensor 7 to collect Information required for different detections, for example, when the irradiation lamp 6 emits white light, the color sensor 5 sends the color on the food, including the possible white, gray, black, light yellow and other characteristic colors of aflatoxin colonies, to the PLC display controller 11 in real time, and at the same time, the AI ​​image recognition sensor 7 sends the type of food seen, including information such as the position and shape of different color parts, to the PLC display controller 11 in real time. When the irradiation lamp 6 emits purple light, the color sensor 5 sends the color on the food, including the possible red fluorescent characteristic color emitted by aflatoxin, to the PLC display controller 11 in real time. At the same time, the AI ​​image recognition sensor 7 sends the nature of the food seen, including the red fluorescent part and shape, to the PLC display controller 11 in real time. The PLC display controller 11 compares, analyzes and calculates the received information data with the stored information data according to the programming, and determines whether aflatoxin is detected.

[0032] Further, refer to Figure 2-Figure 3 As shown, in order to facilitate the full detection of the food odor by the olfactory sensor array 4, an air flow mechanism is also included. The air flow mechanism includes an air flow drive assembly connected to the upper end of the air collection tube 2 and an air outlet pipe 8 provided on the air collection tube 2. The output end of the air outlet pipe 8 extends to the outside of the outer cylinder 1, and is used to drive air to be discharged from the air outlet pipe 8. The air flow drive assembly includes a servo motor 17 and a fan 18 connected to the output shaft of the servo motor 17. The servo motor 17 is connected to the inner wall of the air collection tube 2 through a third bracket 19. The fan 18 is located directly above the olfactory sensor array 4. The fan 18 is driven to rotate by the servo motor 17, so that negative pressure is generated inside the air collection tube 2. The air is sucked in from the bottom of the outer cylinder 1 and discharged from the air outlet pipe 8. The odor of food carried in the air flow contacts the olfactory sensor array 4 for detection.

[0033] The air collecting tube 2 includes a tapered portion 12 at the lower end of the outer cylinder 1 and a straight tube portion 13 integrally connected to the tapered portion 12. The olfactory sensor array 4 is connected to the straight tube portion 13 through a first bracket 14. Ventilation channels 15 for ventilation are evenly distributed between the olfactory sensor array 4 and the inner wall of the straight tube portion 13 to ensure that the airflow carrying the food odor can fully and evenly contact the olfactory sensor array 4, thereby improving the accuracy and sensitivity of olfactory detection. The air inlet arc 20 has a support leg 21 between two adjacent air inlet arcs 20, and an air inlet hole 22 is opened between the support leg 21 and the air collecting tube 2 on the outer cylinder 1. When the servo motor 17 works and the wind wings 18 rotate, air can enter the air collecting tube 2 through the air inlet arc 20 and the air inlet hole 22, pass through the lower surface and circumference of the olfactory sensor array 4, and then pass through the wind wings 18 into the air outlet pipe 8 before being discharged, ensuring that the food odor can quickly and fully contact the olfactory sensor array 4, thereby improving the detection efficiency.

[0034] Reference Figure 3 As shown, further, the taste sensor array 3 is connected to the conical portion 12 through the second bracket 16, and the lower end surface of the taste sensor array 3 is higher than the lower end surface of the outer cylinder 1, so as to contact the food for taste information detection, so that during the detection process, the taste sensor array 3 can directly contact the food and accurately obtain taste information.

[0035] Furthermore, the signal acquisition and pattern recognition module 9 amplifies, screens, and identifies the taste signal and transmits the characteristic taste curve to the PLC display controller 11. The signal processing and pattern recognition module 10 amplifies, screens, processes, and identifies the odor signal and transmits the characteristic odor curve to the PLC display controller 11. After the taste sensor array 3 transmits the collected taste signal to the signal acquisition and pattern recognition module 9, it first enters the signal amplifier part. The signal amplifier uses a low-noise, high-gain operational amplifier, which can automatically adjust the amplification factor according to the characteristics of the taste signal. The amplified taste signal then enters the screening and denoising unit and finally enters the pattern recognition stage. In the pattern recognition unit, a large number of taste feature template libraries related to aflatoxin are pre-stored. The currently processed taste signal is compared and matched with the feature templates in the template library. By calculating the similarity between the signal and each template, the most matching template is found, and the corresponding aflatoxin characteristic bitterness intensity taste curve is extracted from it. Finally, The odor signal transmitted to the PLC display controller 11 is first pre-processed by the sensor signal conditioning circuit, and then enters the digital signal processor for feature extraction and analysis. Based on the feature extraction and analysis, the signal processing and pattern recognition module 10 uses a pre-trained odor recognition model to screen and identify the odor signal. When the characteristic odor of Aspergillus flavus is identified, the module further calculates and generates a characteristic musty odor intensity curve of Aspergillus flavus, and finally transmits it to the PLC display controller 11. After the received information data is compared, analyzed and calculated with the stored information data according to the programming, the conclusion of whether aflatoxin is detected is displayed.

[0036] It also includes a warning device 23 electrically connected to the PLC display controller 11. The warning device 23 is used to issue sound and light warnings when the detected aflatoxin exceeds the set threshold. When the aflatoxin content in the food is detected to be lower than the national standard limit, it can be displayed in green. When it exceeds the national standard limit, in order to attract special attention of personnel, the warning device 23 can also emit eye-catching colors and warning sounds.

[0037] The present invention also provides a method for using a convenient home aflatoxin detection device. The method is implemented based on the above-mentioned convenient home aflatoxin detection device, and the method comprises the following steps:

[0038] S1: Place the outer cylinder 1 on the food to be tested, and ensure that the food is not higher than the air inlet to prevent the food from blocking the air inlet and preventing external air from entering the air collecting cylinder 2, thereby affecting the air circulation effect;

[0039] S2: When the PLC display controller 11 controls the lighting to emit different colors of light, the color sensor 5 and the AI ​​image recognition sensor 7 transmit the fluorescent characteristic colors of possible aflatoxin and the observed food properties including the fluorescent parts and shapes to the PLC display controller 11 in real time;

[0040] S3: The taste sensor array 3 contacts the food and transmits the food taste information to the signal acquisition and pattern recognition module 9. After amplification, screening and identification, the characteristic taste curve of aflatoxin is transmitted to the PLC display controller 11. The airflow drive component transmits the food odor to the olfactory sensor array 4, and then transmits the odor information to the signal processing and pattern recognition module 10. After amplification, screening, processing and identification, the characteristic musty odor intensity curve of Aspergillus fumigatus is transmitted to the PLC display controller 11.

[0041] S4: The PLC display controller 11 compares and analyzes the received information with the stored data to determine whether aflatoxin is detected and gives corresponding prompts.

[0042] It should be noted that a lithium battery for providing power can also be installed in the outer cylinder 1, and a charging port for charging the lithium battery can be provided, so that it has an independent power supply system to ensure the independence and portability of the detection device. At the same time, the olfactory and taste characteristic data can be collected through the electronic nose and electronic tongue devices and transmitted to the PLC display controller 11, and the curve data can be associated with the corresponding food sample information, aflatoxin concentration information, etc. and stored for matching and comparison in subsequent detection and analysis. The PLC display controller 11 can also be equipped with built-in adaptive self-learning software. As the number of tests increases and the test data accumulates, the detection model and algorithm are continuously optimized, and the data processing parameters, pattern recognition rules, etc. are automatically adjusted to better adapt to different types of food, complex detection environments and changes in aflatoxin characteristics, and continuously improve detection accuracy and reliability.

[0043] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A convenient household aflatoxin detection device, characterized in that: include; A hand-held outer cylinder (1), wherein an air collecting cylinder (2) is coaxially connected to the interior of the outer cylinder (1); A taste and smell detection component, the taste and smell detection component comprising a taste sensor array (3) mounted on the lower end of the air collecting tube (2) and an olfactory sensor array (4) located on the upper end of the taste sensor array (3); An optical detection component, comprising a color sensor (5), an illumination lamp (6), and an AI image recognition sensor (7) located in the taste sensor array (3), for working together to obtain food color and image features; An air flow mechanism, the air flow mechanism comprising an air flow drive assembly connected to the upper end of the air collecting cylinder (2) and an air outlet pipe (8) provided on the air collecting cylinder (2), wherein the output end of the air outlet pipe (8) extends to the outside of the outer cylinder (1) and is used to drive air to be discharged from the air outlet pipe (8); a signal processing and control component, the signal processing and control component comprising a signal acquisition and pattern recognition module (9) electrically connected to the taste sensor array (3), a signal processing and pattern recognition module (10) electrically connected to the olfactory sensor array (4), and a PLC display controller (11) electrically connected to the taste and olfactory detection component and the optical detection component, the PLC display controller (11) further storing aflatoxin typical characteristic photos, olfactory and taste characteristic curves, for comparing and analyzing received aflatoxin information data with stored information data; The air collecting cylinder (2) comprises a conical portion (12) located at the lower end of the outer cylinder (1) and a straight cylinder portion (13) integrally connected to the conical portion (12); the olfactory sensor array (4) is connected to the straight cylinder portion (13) via a first bracket (14); and ventilation channels (15) for ventilation are uniformly provided between the olfactory sensor array (4) and the inner wall of the straight cylinder portion (13); The airflow drive assembly includes a servo motor (17) and a wind fin (18) connected to an output shaft of the servo motor (17). The servo motor (17) is connected to the inner wall of the straight cylinder (13) through a third bracket (19). The wind fin (18) is located directly above the olfactory sensor array (4).

2. A convenient household aflatoxin detection device according to claim 1, characterized in that: The signal acquisition and pattern recognition module (9) amplifies, screens, and identifies the taste signal and transmits the characteristic taste curve to the PLC display controller (11), and the signal processing and pattern recognition module (10) amplifies, screens, processes, and identifies the odor signal and transmits the characteristic odor curve to the PLC display controller (11).

3. A convenient household aflatoxin detection device according to claim 1, characterized in that: The taste sensor array (3) is connected to the conical portion (12) via a second bracket (16), and the lower end surface of the taste sensor array (3) is higher than the lower end surface of the outer cylinder (1), and is used for contacting food to detect taste information.

4. A convenient household aflatoxin detection device according to claim 1, characterized in that: A pair of air inlet arcs (20) are provided at the lower end of the outer cylinder (1), a support leg (21) is provided between two adjacent air inlet arcs (20), and an air inlet hole (22) is provided at a portion between the support leg (21) and the air collecting tube (2) on the outer cylinder (1).

5. A convenient household aflatoxin detection device according to claim 1, characterized in that: The illumination lamp (6) can emit at least two different colors of light to cooperate with the color sensor (5) and the AI ​​image recognition sensor (7) to collect information required for different detections.

6. A convenient household aflatoxin detection device according to claim 1, characterized in that: It also includes a warning device (23) electrically connected to the PLC display controller (11), and the warning device (23) is used to issue a sound and light warning when the detected aflatoxin exceeds a set threshold.

7. A method for using a convenient home aflatoxin detection device, based on the convenient home aflatoxin detection device according to claims 1-6, characterized in that: The steps include: S1: Place the outer cylinder (1) on the food to be tested, and ensure that the food is not higher than the air inlet; S2: When the lighting lamp is controlled to emit different colors of light through the PLC display controller (11), the fluorescent characteristic color of the possible aflatoxin and the observed food properties including the fluorescent part and shape are sent to the PLC display controller (11) in real time through the color sensor (5) and the AI ​​image recognition sensor (7); S3: The taste sensor array (3) contacts the food and transmits the food taste information to the signal acquisition and pattern recognition module (9). After amplification, screening and identification, the characteristic taste curve of aflatoxin is transmitted to the PLC display controller (11). The airflow drive component transmits the food odor to the olfactory sensor array (4), and then transmits the odor information to the signal processing and pattern recognition module (10). After amplification, screening, processing and identification, the characteristic musty odor intensity curve of Aspergillus flavus is transmitted to the PLC display controller (11). S4: The PLC display controller (11) compares and analyzes the received information with the stored data to determine whether aflatoxin is detected and gives corresponding prompts.

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