Mildewed tobacco leaf detection device based on hyperspectral imaging technology

Abstract

The utility model discloses a mildewed tobacco leaf detection device based on a hyperspectral imaging technology. The problems of poor detection accuracy and reliability when mildew detection is carried out by means of sense organs of inspectors in the prior art are mainly solved. The device comprises a main rail line, a qualified product branch line and a mildew product branch line which are correspondingly connected with the main rail line through turnouts, at least one flat trolley which runs on the main rail line, the qualified product branch line and the mildew product branch line and is used for carrying tobacco stacks, and a detection assembly which is erected right above the mileage corresponding to the main rail line, the detection assembly comprises a hyperspectral imager used for obtaining spectral information of the tobacco stack, an industrial personal computer in corresponding communication connection with the hyperspectral imager, and a switch in communication connection with the industrial personal computer and used for controlling the action position of the turnout. The detection device has the advantages of high mildew detection accuracy, high detection efficiency and the like.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of tobacco processing, in particular to a mildewy tobacco leaf detection device based on hyperspectral imaging technology. BACKGROUND

[0002] Tobacco leaf mildew detection is a crucial link in the tobacco industry, which is related to the quality of tobacco products and the health of consumers. Tobacco leaf mildew is mainly caused by internal and external factors. Internal factors include chemical components of tobacco leaves, such as carbohydrates and nitrogen-containing compounds, which can provide nutrients for mold; external factors are mainly environmental factors such as temperature and humidity, and suitable temperature and humidity conditions can promote the growth and reproduction of mold. When the water content in tobacco leaves exceeds the safe storage standard, and the environmental temperature is high, the tobacco leaves are prone to mildew. The contents of mildewed tobacco leaves are rapidly decomposed, the normal structure is destroyed, the appearance color is dark, the original aroma disappears, a strong moldy odor is emitted, the taste is deteriorated, and the irritation is increased. In addition, mildewed tobacco leaves may produce substances harmful to human health, affecting the health of consumers.

[0003] The prior art known to the inventors generally uses sensory detection method to detect tobacco leaf mildew. It mainly includes visual inspection, olfactory inspection, wiping identification, and sensory evaluation and smoking, etc. Specifically, in visual inspection, tobacco and products are placed on white paper, and whether there are mold spots, white or blue fuzzy substances, etc. on the surface is observed by naked eye; in olfactory inspection, whether there is moldy smell is smelled by nose, but high-grade cigarettes are difficult to accurately distinguish by olfactory when they are mildewed but have no obvious mildew; in wiping identification, when the white spots on tobacco or tobacco stems are uncertain, a cotton swab is soaked in warm water, the water is wrung out and wiped on the white spots, and if it is a mold spot, it can be wiped off; in addition, in sensory evaluation and smoking, if the tobacco sample has no mold spots or no obvious moldy smell, but the moisture or package / box temperature is abnormal, the sample can be further prepared and then sensory evaluation and smoking are performed to determine whether there is moldy smell.

[0004] However, the inventors found in the process of implementing the embodiments of the present application that the above-mentioned sensory detection method needs to rely on human detection, which not only has high labor intensity, low efficiency, but also the accuracy and reliability of the detection result are affected by the professional quality of the operator, and the slight mildewy tobacco leaves may lead to missed detection.

[0005] The information disclosed in this BACKGROUND section is only for the purpose of enhancing the understanding of the background of the present disclosure and should not be taken as admitting that such information is prior art with respect to the present disclosure. SUMMARY

[0006] In view of at least one of the above technical problems, the present disclosure provides a mildewy tobacco leaf detection device based on hyperspectral imaging technology, which aims to solve the problem of poor detection accuracy and reliability in the prior art when relying on sensory detection of inspectors.

[0007] According to one aspect of the present disclosure, there is provided a mildewy tobacco leaf detection device based on hyperspectral imaging technology, which comprises a main track, a qualified product branch track and a mildewy product branch track connected with the main track through a turnout, at least one flat car for carrying tobacco bales running on the main track, the qualified product branch track and the mildewy product branch track, and a detection assembly arranged directly above the main track; the detection assembly comprises a hyperspectral imager for acquiring spectral information of the tobacco bales, an industrial computer in communication connection with the hyperspectral imager, and a switch in communication connection with the industrial computer for controlling the action position of the turnout.

[0008] In some embodiments of the present disclosure, the main track, the qualified product branch track and the mildewy product branch track are respectively fixed to track plates, and the track plates are provided with conductive tracks along the symmetrical midlines of the main track, the qualified product branch track and the mildewy product branch track for providing power to the flat car.

[0009] In some embodiments of the present disclosure, the flat car comprises a carrying plate, track wheels arranged on both sides of the carrying plate, a driving motor arranged at the bottom of the carrying plate and in driving connection with the track wheels, and a pantograph in electrical connection with the driving motor and arranged at the bottom of the carrying plate for contacting the conductive track.

[0010] In some embodiments of the present disclosure, the flat car further comprises a controller, the driving motor is in electrical connection with the controller, and the controller is in wireless communication connection with the industrial computer.

[0011] In some embodiments of the present disclosure, a discharging plate is arranged above the carrying plate, one side of the discharging plate is hinged to the carrying plate, and a hydraulic rod is arranged between the other side of the discharging plate and the bottom of the carrying plate.

[0012] In some embodiments of the present disclosure, the detection assembly comprises a housing, and a touch screen and control buttons in communication connection with the industrial computer are embedded in the housing.

[0013] In some embodiments of the present disclosure, the detection assembly further comprises a position sensor in communication connection with the industrial computer and used for detecting the position of the flat car.

[0014] In some embodiments of the present disclosure, the mildewy tobacco leaf detection device further comprises a car recovery line respectively connected between the qualified product branch track and the main track and between the mildewy product branch track and the main track.

[0015] In some embodiments of the present disclosure, one side of the car recovery line at the corresponding connection position of the qualified product branch track and the mildewy product branch track is provided with a conveyor belt for transferring the tobacco bales to a corresponding stacking position.

[0016] The one or more technical solutions provided in the embodiments of the present application have at least any of the following technical effects or advantages:

[0017] The spectral collection of the target tobacco bale is realized by the hyperspectral imager, the spectral data analysis and judgment are realized by the industrial computer, and the communication of the qualified product branch line or the mildew product branch line with the main track line is controlled according to the detection result, so that the classified transportation of the target tobacco bale is realized. This process can greatly reduce the labor intensity and the labor participation degree of the detection link, and the accuracy of the mildew detection can be greatly improved through spectral information analysis, and the detection efficiency is effectively improved. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 Part of the structure of the mildew tobacco detection device in an embodiment of the present application is shown in the figure.

[0019] In the above figures, 1 is the main track line, 2 is the qualified product branch line, 3 is the mildew product branch line, 4 is the turnout, 5 is the track plate, and 6 is the detection assembly. DETAILED DESCRIPTION

[0020] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inner", "outer", "vertical", "horizontal", "clockwise", "counterclockwise" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. The present application involves "connection" and "coupling", unless otherwise specified, which includes direct and indirect connection (coupling).

[0021] The programs involved or relied on in the following embodiments are all conventional programs or simple programs in the technical field, and those skilled in the art can make conventional choices or adaptive adjustments according to specific application scenarios.

[0022] In order to better understand the technical solutions of the present application, the above technical solutions will be described in detail below in combination with the drawings in the specification and specific embodiments.

[0023] To solve the problem of low detection accuracy and poor reliability in the detection of tobacco mildew by relying on the sense of detection personnel in the prior art, the present example discloses a mildew tobacco detection device based on hyperspectral imaging technology.

[0024] Reference Figure 1The moldy tobacco leaf detection device includes a main track line 1, a qualified product branch line 2 and a moldy product branch line 3. Among them, the qualified product branch line 2 and the moldy product branch line 3 are connected to the main track line 1 through a switch 4, so that the qualified product branch line 2 or the moldy product branch line 3 can be connected to the main track line 1 at a certain moment by changing the position of the switch 4, so that the target tobacco stack that has been tested is transported to the corresponding place along the corresponding branch line for classified storage according to whether the test results show mold. Specifically, in this embodiment, the main track line 1, the qualified product branch line 2 and the moldy product branch line 3 are fixed on the track plate 5, and the main track line 1, the qualified product branch line 2 and the moldy product branch line 3 use tracks of the same specifications. Among them, a number of support frames are fixed in the bottom array of the track plate 5, which are used to firmly fix the track plate 5 on the ground to avoid shaking; and the track plate 5 is set at a certain height from the ground through the support frame. On the one hand, it can avoid the track plate being placed directly on the ground, which is easy to cause foreign body interference and affect the operation and detection safety; on the other hand, it can also facilitate the relay with the conveyor belt used to receive the target cigarette stack.

[0025] In order to realize the transportation of the target cigarette stack along the track, in this embodiment, at least one flatbed trolley is running on the tracks of the main track line 1, the qualified product branch line 2 and the moldy product branch line 3. The flatbed trolley is used to carry the target cigarette stack along the track line, and to classify and transport it according to the detection results after detection. In this embodiment, the flatbed trolley includes a loading plate, and rail wheels are respectively provided on both sides of the bottom of the loading plate through bearings. In this example, a total of four rail wheels are provided, and the rail wheels are coaxially connected in pairs through transmission shafts. In order to realize the movement of the flatbed trolley, a drive motor is fixed at the bottom of the loading plate, wherein the drive motor is connected to one of the transmission shafts through a reducer, thereby making the two rail wheels connected to the drive motor as driving wheels, and the other two rail wheels as driven wheels, and the movement of the flatbed trolley is realized by the drive of the driving wheels.

[0026] Considering that the movement of the flat trolley needs to drive the driving motor, and the power output of the driving motor needs reliable power supply, therefore, in the embodiment, the conductive rail is arranged along the center line of the track of the main track 1, the qualified product branch track 2 and the mildew product branch track 3 at the track plate, and the conductive rail is connected to the power supply. Correspondingly, the bottom of the flat trolley is provided with a pantograph for contacting the conductive rail, thereby obtaining power from the conductive rail to ensure power supply of the flat trolley. Wherein, the pantograph has a certain range of deformation characteristics, so that when the track plate is not stable, the reliable contact between the pantograph and the conductive rail can still be ensured to avoid power interruption. In addition, by arranging the conductive rail at the track plate, the grounding treatment can be facilitated at the track plate to ensure the safety of power supply, while reducing the risk of accidental contact of the conductive rail and improving the safety of the device. In other embodiments, the conductive rail is pre-buried in the track plate, and a through slit is provided at the corresponding position of the top surface of the track plate. The pantograph at the bottom of the flat trolley passes through the through slit of the top surface of the track plate to contact the conductive rail inside the track plate, further reducing the risk of electric shock and improving the safety of the device operation.

[0027] In order to realize the mildew detection of the target tobacco pile, in the embodiment, the detection assembly is fixedly arranged at the corresponding mileage of the main track, wherein the detection assembly is fixedly arranged above the main track by a support, as shown in Figure 1 The detection assembly 6 includes a casing, a hyperspectral imager and an industrial computer are arranged in the casing. In this example, a Resonon Pika L hyperspectral imager is used, which can collect spectral data including 150 bands, the spectral sampling range is 400-1000nm, and the maximum sampling frame number per second can reach 249 frames; the lens of the hyperspectral imager is vertically directed towards the track plate, and the focal length is adjusted to 17mm, thereby collecting spectral data of the tobacco pile transported by the flat trolley into the field of view of the hyperspectral imager. In addition, the hyperspectral imager and the industrial computer are in communication connection for transmitting the collected spectral data to the industrial computer, and the data is stored and analyzed based on the industrial computer. Specifically, by using one-way linear regression, multiple linear regression, PLSR regression method, support vector regression and RFR learning modeling method, a tobacco mildew analysis model is established, the hyperspectral image obtained by the hyperspectral imager is used to screen spectral parameters, and accurate and non-destructive judgment of tobacco mildew condition is realized. In addition, in order to realize the interaction between the operator and the industrial computer, as shown in Figure 1 In the embodiment, a touch screen and control buttons in communication connection with the industrial computer are embedded at the casing of the detection assembly, thereby realizing input of corresponding operation instructions and display interaction of information.

[0028] Wherein, when the hyperspectral imager collects spectral data, the flat car needs to be accurately parked right below the hyperspectral imager to ensure that the target tobacco column is completely within the field of view of the hyperspectral imager. Therefore, in the embodiment, the detection assembly further comprises a position sensor in communication connection with the industrial computer, which in this case is arranged on one side of the detection assembly housing and specifically adopts an infrared sensor. The infrared sensor is arranged at the track plate, and when the flat car passes, the infrared sensor outputs a signal to the industrial computer. Meanwhile, the flat car further comprises a controller, which is electrically connected with the driving motor for controlling the start and stop of the driving motor, and is also in wireless communication with the industrial computer, thereby obtaining the stop signal sent by the industrial computer after receiving the infrared sensor signal to control the flat car to stop running. In the embodiment, in order to ensure that the flat car can be accurately parked, hydraulic brakes are arranged at the track wheels of the flat car respectively, and the hydraulic brakes are controlled by the controller to realize braking, thereby ensuring that the flat car can be accurately parked. In some other embodiments, a car stopper is hingedly arranged at the track plate. After receiving the stop signal sent by the industrial computer, the car stopper is raised to interfere with the position of the flat car, thereby avoiding the flat car from further sliding under the action of inertia, and the car stopper is recovered after detection to avoid affecting the continuous transportation of the flat car.

[0029] After the target tobacco column carried by the flat car is detected, it needs to be transported and stored according to its detection results. Therefore, in the embodiment, the turnout 4 is drivingly connected with a switch, which is in communication connection with the industrial computer. Thus, the switch adjusts and controls the action position of the turnout according to the action instruction sent by the industrial computer according to the detection results, thereby realizing the connection of the qualified product branch line 2 or the mildew product branch line 3 with the main track line 1, adjusting the transportation direction of the flat car, and thereby realizing classified transportation.

[0030] Considering that the number of target tobacco columns is large and needs to be continuously transported and detected, in order to enable the flat car to return to the main track line after classified transportation to participate in the next round of detection and transportation, in the embodiment, a car recovery line is connected and arranged between the qualified product branch line 2 and the main track line 1, and between the mildew product branch line 3 and the main track line 1, thereby forming two loop lines respectively, so that the flat car can run to the starting position along the car recovery line after classified transportation of the target tobacco column, so as to participate in the next cycle of transportation operation.

[0031] In order to facilitate the flat trolley classification transport to the target position after the target tobacco pile unloading, in the embodiment, the unloading plate is arranged above the flat trolley loading plate, in the embodiment, the outer edge contour of the unloading plate is consistent with the outer edge contour of the loading plate, and one side of the unloading plate is hingedly arranged with the loading plate, and the other side of the unloading plate is fixedly arranged with the hydraulic rod between the bottom and the top surface of the loading plate, and the action of the hydraulic rod is controlled by the flat trolley controller, so that the flat trolley is transported to the unloading position along the corresponding track, and the controller controls the hydraulic rod to rise, so that the included angle between the unloading plate and the loading plate gradually increases, and after the target tobacco pile slides under the action of the gravity component, the hydraulic rod is recovered, and the flat trolley completes the unloading.

[0032] In the embodiment, since the track plate has a certain height, in order to avoid violent falling of the unloaded tobacco pile and gathering in the same place, in the embodiment, the unloading point of the target tobacco pile is arranged at the connection between the qualified product branch line or the mildew product branch line and the trolley recovery line, and the unloading point is arranged with a conveyor belt on one side of the track plate, so that the target tobacco pile unloaded by the flat trolley can directly slide to the conveyor belt, and further transportation is realized by the transmission belt. In the embodiment, in order to realize the parking of the flat trolley at the unloading point, a position sensor connected with the industrial computer is arranged at a certain position in front of the unloading point, the controller of the flat trolley wirelessly communicates with the industrial computer to receive the parking instruction and realize braking; and in order to further ensure the parking accuracy and ensure that the target tobacco pile can accurately slide to the transmission belt, a car stopper is also arranged at the unloading point track plate, which is used to interfere with the flat trolley when parking and prevent the flat trolley from continuing to move under the action of inertia, thereby ensuring the parking accuracy.

[0033] Although some preferred embodiments of the present application have been described, those skilled in the art can make further changes and modifications to these embodiments once they know the basic inventive concept. Therefore, the appended claims are intended to be interpreted as including all changes and modifications falling within the scope of the present application.

[0034] Obviously, those skilled in the art can make various modifications and variations to the present application without departing from the spirit and scope of the inventive concept. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

1. A moldy tobacco leaf detection device based on hyperspectral imaging technology, characterized in that, The system comprises a main track, a qualified product branch track and a mildew product branch track connected with the main track through a turnout, at least one flat car for carrying tobacco bales running on the main track, the qualified product branch track and the mildew product branch track, and a detection assembly arranged above the main track; the detection assembly comprises a hyperspectral imager for obtaining spectral information of the tobacco bales, an industrial computer in communication connection with the hyperspectral imager, and a switch in communication connection with the industrial computer for controlling the action position of the turnout.

2. The moldy tobacco leaf detection device of claim 1, wherein, The main track, the qualified product branch track and the mildew product branch track are fixed to track plates, and the track plates are provided with conductive rails along the symmetrical center lines of the main track, the qualified product branch track and the mildew product branch track for providing power to the flat car.

3. The moldy tobacco leaf detection device of claim 2, wherein, The flat car comprises a carrying plate, track wheels arranged on both sides of the carrying plate, a driving motor arranged at the bottom of the carrying plate and in transmission connection with the track wheels, and a pantograph in electrical connection with the driving motor and arranged at the bottom of the carrying plate for contacting the conductive rail.

4. The moldy tobacco leaf detection device of claim 3, wherein, The flat car further comprises a controller, the driving motor is in electrical connection with the controller, and the controller is in wireless communication connection with the industrial computer.

5. The moldy tobacco leaf detection device of claim 3, wherein, A discharging plate is arranged above the carrying plate, one side of the discharging plate is hinged to the carrying plate, and a hydraulic rod is arranged between the other side bottom of the discharging plate and the carrying plate.

6. The moldy tobacco leaf detection device of claim 1, wherein, The detection assembly comprises a device shell, and a touch screen and control buttons in communication connection with the industrial computer are embedded in the device shell.

7. The moldy tobacco leaf detection device of claim 1, wherein, The detection assembly further comprises a position sensor in communication connection with the industrial computer and used for detecting the position of the flat car.

8. The moldy tobacco leaf detection device of claim 1, wherein, The system further comprises a car recovery line respectively connected between the qualified product branch track and the main track and between the mildew product branch track and the main track.

9. The moldy tobacco leaf detection device of claim 8, wherein, One side of the car recovery line at the connection position corresponding to the qualified product branch track and the mildew product branch track is provided with a conveyor belt for transferring the tobacco bales to a corresponding stacking position.

Images