Near-infrared filter tip detection device and control method thereof

Abstract

The invention relates to the field of near-infrared analysis equipment, in particular to a near-infrared filter tip detection device which comprises an installation fixing plate, a near-infrared detection module, a background plate, an automatic calibrator, a calibration plate and a conveying device used for conveying filter tips, and the conveying device is arranged on the installation fixing plate in a segmented mode; the near-infrared detection module and the background plate are arranged on the upper side and the lower side between the adjacent conveying devices correspondingly. The near-infrared detection module is provided with a near-infrared light source used for emitting near-infrared light and a near-infrared detection lens used for receiving the near-infrared light. Near-infrared light emitted by the near-infrared light source penetrates through the fiber rod, is reflected by the background plate and then is received by the near-infrared detection lens. And the automatic calibrator is arranged on the background plate and pushes the calibration plate to the near-infrared detection lens to automatically calibrate the near-infrared detection module.

Description

Technical Field

[0001] The present invention relates to the field of near-infrared analysis equipment, and more particularly to a near-infrared filter rod detection device and a control method thereof. Background Art

[0002] Near-infrared (NIR) detection devices enable nondestructive testing of samples. The principle is that NIR spectroscopy is a frequency-harmonic and primary absorption spectrum of molecular vibrations. This spectrum is generated primarily by the non-resonant nature of molecular vibrations, which causes transitions from the ground state to higher energy levels. It possesses strong penetrating power. NIR light primarily absorbs the frequency-harmonic and primary absorption of hydrogen-containing groups (X-H) (X=C, N, O), which contain information about the composition and molecular structure of most organic compounds. Because different organic compounds contain different groups with varying energy levels, different groups and the same group exhibit distinctly different absorption wavelengths of NIR light in different physicochemical environments. Furthermore, the absorption coefficient is small, resulting in minimal heat generation. Therefore, NIR spectroscopy is an effective means of obtaining information. When irradiated with NIR light, light and groups of the same frequency resonate, transferring light energy to the molecule through changes in the molecular dipole moment. However, if the frequency of the NIR light differs from the vibrational frequency of the sample, the light of that frequency will not be absorbed. Therefore, when a sample is illuminated with near-infrared light of continuously varying frequencies, the sample selectively absorbs near-infrared light of varying frequencies, causing the near-infrared light to weaken within certain wavelength ranges. The transmitted infrared light then carries information about the composition and structure of the organic matter. By analyzing the optical density of the transmitted or reflected light using a detector, the content of that component can be determined. Currently, near-infrared detection devices are widely used in the detection field.

[0003] Tobacco was introduced to China in the mid-16th century and has a cultivation history of more than 400 years. Among current tobacco products, filter rods are an important component of tobacco products, mainly used to filter some harmful substances, reduce the temperature of inhaled smoke and improve the taste of smoking. In addition, studies have found that the materials and additives used in filter rods will have a great impact on the taste of smoking. However, there is currently no near-infrared detection device on the market that can quickly detect filter rod samples.

[0004] Therefore, it is necessary to propose a near-infrared filter rod detection device and a control method thereof to solve the above problems. Summary of the Invention

[0005] In order to overcome at least one defect (shortcoming) of the above-mentioned prior art, the present invention provides a near-infrared filter rod detection device and a control method thereof.

[0006] To solve the above technical problems, the technical solution of the present invention is as follows: a near-infrared filter rod detection device, comprising a mounting plate, a near-infrared detection module, a background plate, an automatic calibrator, a calibration plate, and a conveying device for conveying filter rods;

[0007] The conveying device is arranged in sections on the mounting plate;

[0008] The near-infrared detection module and the background plate are respectively arranged on the upper and lower sides between the adjacent conveying devices. The near-infrared detection module is provided with a near-infrared light source for emitting near-infrared light and a near-infrared detection lens for receiving near-infrared light. The near-infrared light emitted by the near-infrared light source passes through the fiber rod and is reflected by the background plate, and then is received by the near-infrared detection lens.

[0009] The automatic calibrator is set on the background plate, and the automatic calibrator pushes the calibration plate to the near-infrared detection lens to automatically calibrate the near-infrared detection module. By setting the conveying device in sections on the mounting plate, a near-infrared detection module, a background plate and an automatic calibrator for detecting the filter rod can be set between adjacent conveying devices. Through the setting of the automatic calibrator and the calibration plate, the near-infrared detection module can be automatically calibrated to eliminate interference from the environment and photons. After the automatic calibration, the near-infrared detection module can perform near-infrared scanning on the filter rod, and the background plate can reflect the near-infrared light passing through the filter rod, which can reduce interference and improve the detection accuracy, thereby ensuring that the near-infrared detection module can accurately detect the composition and content ratio of each substance in the filter rod.

[0010] Furthermore, the conveying device includes a filter rod conveying drive motor, a first transmission wheel, a second transmission wheel, a third transmission wheel, a fourth transmission wheel, a first transmission belt, and a second transmission belt;

[0011] The first transmission wheel, the second transmission wheel, the third transmission wheel and the fourth transmission wheel are arranged at the same height of the mounting plate;

[0012] The filter rod conveying drive motor is connected to the first transmission wheel, the first transmission belt is sleeved between the first transmission wheel and the second transmission wheel, and the second transmission belt is sleeved between the third transmission wheel and the fourth transmission wheel;

[0013] The second transmission wheel and the third transmission wheel are connected by a linkage. Since the filter rod conveying drive motor is connected to the first transmission wheel, the linkage is arranged between the second transmission wheel and the third transmission wheel. Therefore, even if the conveying device is segmented, only one filter rod conveying drive motor is needed to synchronously drive multiple segmented conveying devices. By segmenting the conveying device, it is convenient to set a near-infrared detection module, background plate and automatic calibrator between the conveying devices, thereby facilitating near-infrared detection of the filter rods.

[0014] Furthermore, the linkage comprises a first linkage shaft, a second linkage shaft, a first linkage wheel, a second linkage wheel and a linkage belt;

[0015] A connecting hole is provided on the mounting plate, one end of the first linkage shaft is connected to the second transmission wheel, and the other end is connected to the first linkage wheel after passing through the connecting hole of the mounting plate. One end of the second linkage shaft is connected to the third transmission wheel, and the other end is connected to the second linkage wheel after passing through the connecting hole of the mounting plate. The linkage belt is arranged on the outside of the first linkage wheel and the second linkage wheel. By providing a connecting hole on the mounting plate, the passage of the first linkage shaft and the second linkage shaft is facilitated. Through such an arrangement, the linkage device is arranged on the back side of the mounting plate, and the conveying device is arranged in sections on the front side of the mounting plate, so as to facilitate near-infrared detection of filter rods between adjacent conveying devices.

[0016] Furthermore, the mounting plate is provided with an upper pressure plate and side baffles for limiting the movement of the filter rod, the inner surfaces of the upper pressure plate and the side baffles and the upper surfaces of the first transmission belt and the second transmission belt constitute a filter rod transmission channel, the near-infrared detection lens is coplanar with the inner surface of the upper pressure plate, and the filter rod transmission channel is formed by arranging the upper pressure plate and the side baffles on the upper surfaces of the first transmission belt and the second transmission belt, which can effectively simplify the structure of the filter rod transmission channel, and the bottom of the filter rod moves forward driven by the first transmission belt and the second transmission belt, while the upper pressure plate and the side baffles can limit the movement of the filter rod.

[0017] Furthermore, the feed end of the filter rod transmission channel is trumpet-shaped. The trumpet-shaped feed end of the filter rod transmission channel can flatten the round filter rod into a flat filter rod when the filter rod passes through, thereby increasing the area of the filter rod in contact with the near-infrared light during near-infrared light scanning.

[0018] Furthermore, the automatic calibrator includes a calibrator mounting seat, an electric push rod, a push rod connecting block and a push rod slide for placing a calibration plate;

[0019] The calibrator mounting seat is arranged on the background plate, and the electric push rod is arranged on the calibrator mounting seat;

[0020] The electric push rod is connected to the push rod slide through a push rod connecting block. When in use, the electric push rod can be controlled to push the push rod connecting block, thereby controlling the sliding of the push rod slide used to place the calibration plate. When the push rod slide slides into place, the calibration plate on the push rod slide will fit into the near-infrared detection lens, and the near-infrared detection module can be calibrated according to the calibration plate, thereby eliminating environmental interference and photon interference.

[0021] Furthermore, both sides of the calibrator mounting seat are provided with limit plates for guiding the pushing of the push rod slide. By setting the limit plates, the pushing of the push rod slide can be limited to ensure that the push rod slide is accurately moved to the bottom of the near-infrared detection module after being pushed, and the near-infrared detection lens on the near-infrared detection module is fitted with the calibration plate, thereby calibrating the baseline of the near-infrared detection module. The calibration plate is a white reflective plate made of high-reflectivity material, which is used as standard data for scanning. By comparing the spectral data of the white calibration plate with the spectral data of the substance to be tested, the spectral information of the substance to be tested can be obtained, which can eliminate environmental interference and photon interference, improve the stability and accuracy of the spectrum, and ensure the accuracy of the measurement results. The white calibration plate corrects the measurement reference spectrum, that is, the spectral intensity value of the white calibration plate. The white calibration plate can reflect more than 98% of the light source intensity value. The absorbance of the sample can be calculated based on the spectral intensity value of the white calibration plate and the spectral intensity value of the sample.

[0022] Furthermore, the feed end of the filter rod transmission channel, the filter rod transmission channel at the front end of the near-infrared detection module and the discharge end of the filter rod transmission channel are respectively provided with a first diffuse reflection phototube, a second diffuse reflection phototube and a third diffuse reflection phototube for detecting the position of the filter rod. By setting the first diffuse reflection phototube, the second diffuse reflection phototube and the third diffuse reflection phototube, the movement of the filter rod into position can be detected. The specific operation is that when the first diffuse reflection phototube detects that the filter rod is placed in place, the first diffuse reflection phototube transmits a signal to the control chip, the control chip drives the filter rod conveying drive motor to rotate, and the filter rod moves toward the near-infrared detection module. When the second diffuse reflection phototube at the front end of the near-infrared detection module detects that the front end of the filter rod has moved into position, the second diffuse reflection phototube transmits a signal to the control chip. The signal is transmitted to the control chip, and the control chip controls the near-infrared detection module to emit near-infrared light to perform near-infrared scanning on the filter rod. When the second diffuse reflection phototube at the front end of the near-infrared detection module detects that the end of the fiber rod has moved into place, the second diffuse reflection phototube transmits a signal to the control chip again, and the control chip controls the near-infrared detection module to stop emitting near-infrared light. In this way, the entire filter rod can be completely scanned, and the near-infrared light will not scan the gap between the front and rear filter rods to be detected. When the third diffuse reflection phototube detects that the end of the fiber rod has moved into place, the third diffuse reflection phototube sends a signal to the control chip, and the control chip controls the filter rod conveying drive motor to stop rotating. In the present invention, the near-infrared detection module is arranged on the control chip, and the control chip is arranged on the mounting plate.

[0023] Furthermore, the background plate is made of metal material, which can better reflect near-infrared light, thereby facilitating the detection of the components of the filter rod and the specific content of each component after the near-infrared detection lens receives it.

[0024] In the present invention, a control method for a near-infrared filter rod detection device is disclosed, comprising the following steps:

[0025] Step 1: The automatic calibrator pushes the calibration plate onto the near-infrared detection module and fits the calibration plate to the near-infrared detection lens. The near-infrared detection module performs baseline calibration using the calibration plate to eliminate interference from the environment and photons.

[0026] Step 2: Peel off the wrapping paper on the surface of the filter rod, leaving only the fiber rod in the middle of the filter rod;

[0027] Step 3: Place the fiber rod obtained in Step 2 in the filter rod transmission channel. The first diffuse reflection photoelectric tube detects that the fiber rod is in place, and the first diffuse reflection photoelectric tube transmits a signal to the control chip. The control chip drives the filter rod conveying drive motor to rotate, and the fiber rod moves toward the near-infrared detection module.

[0028] Step 4: The fiber rod is pressed into a flat shape at the feeding end of the trumpet-shaped filter rod transmission channel;

[0029] Step 5: When the second diffuse reflection photoelectric tube at the front end of the near-infrared detection module detects that the front end of the fiber rod has moved into position, the second diffuse reflection photoelectric tube transmits a signal to the control chip. The control chip sends a near-infrared light delay start signal to the near-infrared detection module based on the moving speed of the fiber rod. After receiving the near-infrared light delay start signal, the near-infrared detection module starts emitting near-infrared light after the delay time expires. The near-infrared light passes through the fiber rod and is reflected by the background plate before being received by the near-infrared detection lens.

[0030] Step 6: When the second diffuse reflection photoelectric tube at the front end of the near-infrared detection module detects that the end of the fiber rod has moved into position, the second diffuse reflection photoelectric tube transmits a signal to the control chip. The control chip sends a near-infrared light delay stop signal to the near-infrared detection module according to the moving speed of the fiber rod. After receiving the near-infrared light delay stop signal, the near-infrared detection module stops emitting near-infrared light after the delay time ends.

[0031] Step 7: When the third diffuse reflection photoelectric tube detects that the end of the fiber rod has moved into position, the third diffuse reflection photoelectric tube transmits a signal to the control chip, and the control chip controls the filter rod conveying drive motor to stop rotating.

[0032] Compared with the prior art, the beneficial effects of the technical solution of the present invention are:

[0033] The near-infrared filter rod detection device disclosed in the present invention is configured such that the conveying device is segmented and arranged on a mounting plate. Therefore, a near-infrared detection module, a background plate and an automatic calibrator for detecting the filter rod can be arranged between adjacent conveying devices. By setting the automatic calibrator and the calibration plate, the near-infrared detection module can be automatically calibrated to eliminate interference from the environment and photons. After the automatic calibration, the near-infrared detection module can perform a near-infrared scan on the filter rod, and the background plate can reflect the near-infrared light passing through the filter rod, thereby reducing interference and improving detection accuracy, thereby ensuring that the near-infrared detection module can accurately detect the composition and content ratio of various substances in the filter rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a structural schematic diagram of the automatic calibrator in the present invention when pushing the calibration plate into the near-infrared detection module for calibration.

[0035] Figure 2 It is a schematic structural diagram of the near infrared detection module of the present invention when it is in an uncalibrated state.

[0036] Figure 3 It is a structural schematic diagram of the conveying device of the present invention being arranged on a mounting fixed plate.

[0037] Figure 4 It is a structural schematic diagram of the linkage device of the present invention being arranged on the mounting fixing plate.

[0038] Figure 5 It is a structural schematic diagram of the first linkage shaft and the second linkage shaft in the present invention being arranged on a mounting fixed plate.

[0039] Figure 6 This is a structural diagram of the present invention in which the near-infrared detection module and the background plate are arranged on both sides of the filter rod transmission channel.

[0040] Figure 7 It is a structural schematic diagram of the filter rod transmission channel of the present invention being arranged on a mounting fixing plate.

[0041] Figure 8 It is a structural schematic diagram of the automatic calibrator of the present invention being arranged on a background plate.

[0042] Figure 9 It is a structural schematic diagram of the near-infrared light source and the near-infrared detection lens arranged on the near-infrared detection module in the present invention.

[0043] In the figure, 1 is a mounting plate, 2 is a near-infrared detection module, 3 is a background plate, 4 is an automatic calibrator, 5 is a calibration plate, 6 is a filter rod, 7 is a conveying device, 8 is a near-infrared light source, 9 is a near-infrared detection lens, 10 is a filter rod conveying drive motor, 11 is a first transmission wheel, 12 is a second transmission wheel, 13 is a third transmission wheel, 14 is a fourth transmission wheel, 15 is a first transmission belt, 16 is a second transmission belt, 17 is a linkage, 18 is a first linkage shaft, 19 is a second Linkage shaft, 20 is the first linkage wheel, 21 is the second linkage wheel, 22 is the linkage belt, 23 is the connecting hole, 24 is the upper pressure plate, 25 is the side baffle, 26 is the filter rod transmission channel, 27 is the feed end, 28 is the calibrator mounting seat, 29 is the electric push rod, 30 is the push rod connecting block, 31 is the push rod slide, 32 is the limit plate, 33 is the discharge end, 34 is the first diffuse reflection photoelectric tube, 35 is the second diffuse reflection photoelectric tube, 36 is the third diffuse reflection photoelectric tube, 37 is the control chip. DETAILED DESCRIPTION

[0044] The accompanying drawings are for illustrative purposes only and are not to be construed as limitations on this patent. To better illustrate this embodiment, some components of the accompanying drawings may be omitted, enlarged, or reduced in size, and do not represent the actual dimensions of the product. For those skilled in the art, it is understandable that some well-known structures and their descriptions may be omitted from the accompanying drawings.

[0045] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "installation" and "connection" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium, which can be considered as internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances. The technical solution of the present invention is further described below with reference to the accompanying drawings and embodiments.

[0046] like Figure 1-2 As shown, a near-infrared filter rod detection device includes a mounting plate 1, a near-infrared detection module 2, a background plate 3, an automatic calibrator 4, a calibration plate 5 and a conveying device 7 for conveying the filter rod 6; the conveying device 7 is arranged in sections on the mounting plate 1; the near-infrared detection module 2 and the background plate 3 are respectively arranged on the upper and lower sides between adjacent conveying devices 7, and the near-infrared detection module 2 is provided with a near-infrared light source 8 for emitting near-infrared light and a near-infrared detection lens 9 for receiving near-infrared light. The near-infrared light emitted by the near-infrared light source 8 passes through the fiber rod and is reflected by the background plate 3, and then is received by the near-infrared detection lens 9; the automatic calibrator 4 is arranged on the background plate 3, and the automatic calibrator 4 pushes the calibration plate 5 to the near-infrared detection lens 9 The near-infrared detection module 2 is automatically calibrated, and the conveying device 7 is arranged in sections on the mounting plate 1. Therefore, the near-infrared detection module 2, the background plate 3 and the automatic calibrator 4 for detecting the filter rod 6 can be arranged between adjacent conveying devices 7. Through the setting of the automatic calibrator 4 and the calibration plate 5, the near-infrared detection module 2 can be automatically calibrated to eliminate interference from the environment and photons. After the automatic calibration, the near-infrared detection module 2 can perform near-infrared scanning on the filter rod 6, and the background plate 3 can reflect the near-infrared light passing through the filter rod 6, which can reduce interference and improve the detection accuracy, thereby ensuring that the near-infrared detection module 2 can accurately detect the composition and content ratio of each substance in the filter rod 6.

[0047] like Figure 3As shown, the conveying device 7 includes a filter rod conveying drive motor 10, a first transmission wheel 11, a second transmission wheel 12, a third transmission wheel 13, a fourth transmission wheel 14, a first transmission belt 15, and a second transmission belt 16; the first transmission wheel 11, the second transmission wheel 12, the third transmission wheel 13, and the fourth transmission wheel 14 are arranged at the same height of the mounting plate 1; the filter rod conveying drive motor 10 is connected to the first transmission wheel 11, the first transmission belt 15 is sleeved between the first transmission wheel 11 and the second transmission wheel 12, and the second transmission belt 16 is sleeved between the third transmission wheel 13 and the fourth transmission wheel 14; the second The transmission wheel 12 and the third transmission wheel 13 are connected by a linkage 17. Since the filter rod conveying drive motor 10 is connected to the first transmission wheel 11, the linkage 17 is arranged between the second transmission wheel 12 and the third transmission wheel 13. Therefore, even if the conveying device 7 is segmented, only one filter rod conveying drive motor 10 is needed to synchronously drive multiple segmented conveying devices 7. By segmenting the conveying device 7, it is convenient to set the near-infrared detection module 2, background plate 3 and automatic calibrator 4 between the conveying devices 7, thereby facilitating near-infrared detection of the filter rods.

[0048] like Figure 4-5 As shown, the linkage 17 includes a first linkage shaft 18, a second linkage shaft 19, a first linkage wheel 20, a second linkage wheel 21 and a linkage belt 22; a connecting hole 23 is provided on the mounting plate 1, one end of the first linkage shaft 18 is connected to the second transmission wheel 12, and the other end is connected to the first linkage wheel 20 after passing through the connecting hole 23 of the mounting plate 1, one end of the second linkage shaft 19 is connected to the third transmission wheel 13, and the other end is connected to the second linkage wheel 21 after passing through the connecting hole 23 of the mounting plate 1, and the linkage belt 22 is sleeved on the outside of the first linkage wheel 20 and the second linkage wheel 21. By providing the connecting hole 23 on the mounting plate 1, the passage of the first linkage shaft 18 and the second linkage shaft 19 is facilitated. Through such an arrangement, the linkage 17 is arranged on the back of the mounting plate 1, and the conveying device 7 is arranged in sections on the front of the mounting plate 1, so as to facilitate near-infrared detection of the filter rod 6 between adjacent conveying devices 7.

[0049] like Figure 6-7As shown, an upper pressing plate 24 and a side baffle 25 for limiting the movement of the filter rod 6 are provided on the mounting plate 1. The inner surfaces of the upper pressing plate 24 and the side baffle 25 and the upper surfaces of the first transmission belt 15 and the second transmission belt 16 form a filter rod transmission channel 26. The near-infrared detection lens 9 is coplanar with the inner surface of the upper pressing plate 24. By arranging the upper pressing plate 24 and the side baffle 25 on the upper surfaces of the first transmission belt 15 and the second transmission belt 16 to form a filter rod transmission channel 26, the filter rod transmission channel 26 can be effectively simplified. The filter rod 6 has a structure in which the bottom of the filter rod 6 moves forward driven by the first transmission belt 15 and the second transmission belt 16, and the upper pressure plate 24 and the side baffle 25 can limit the movement of the filter rod 6. In the present invention, the feed end 27 of the filter rod transmission channel 26 is trumpet-shaped. The trumpet-shaped feed end 27 of the filter rod transmission channel 26 can flatten the round filter rod 6 into a flat filter rod 6 when the filter rod 6 passes through, thereby increasing the area of the filter rod 6 in contact with the near-infrared light during near-infrared light scanning.

[0050] like Figure 8-9 As shown, the automatic calibrator 4 includes a calibrator mounting seat 28, an electric push rod 29, a push rod connecting block 30 and a push rod slide 31 for placing the calibration plate 5; the calibrator mounting seat 28 is arranged on the background plate 3, and the electric push rod 29 is arranged on the calibrator mounting seat 28; the electric push rod 29 is connected to the push rod slide 31 through the push rod connecting block 30. When in use, the electric push rod 29 can be controlled so that the electric push rod 29 pushes the push rod connecting block 30, thereby controlling the push rod slide 31 for placing the calibration plate 5 to slide. When the push rod slide 31 slides into place, the calibration plate 5 on the push rod slide 31 will fit with the near-infrared detection lens 9, and the near-infrared detection module 2 can be calibrated according to the calibration plate 5, thereby eliminating environmental interference and photon interference. Among them, limit plates 32 for guiding the pushing of the push rod slide 31 are provided on both sides of the calibrator mounting seat 28. Through the setting of the limit plates 32, The pushing of the push rod slide 31 is limited to ensure that the push rod slide 31 moves accurately to the bottom of the near-infrared detection module 2 after being pushed, and the near-infrared detection lens 9 on the near-infrared detection module 2 is fitted with the calibration plate 5, so as to calibrate the baseline of the near-infrared detection module 2. The calibration plate 5 is a white reflective sheet made of high-reflectivity material, which is used as standard data for scanning. By comparing the spectral data of the white calibration plate 5 with the spectral data of the substance to be tested, the spectral information of the substance to be tested can be obtained, which can eliminate environmental interference and photon interference, improve the stability and accuracy of the spectrum, and ensure the accuracy of the measurement results. The white calibration plate 5 corrects the measurement reference spectrum, that is, the spectral intensity value of the white calibration plate 5. The white calibration plate 5 can reflect more than 98% of the light source intensity value. The absorbance of the sample can be calculated based on the spectral intensity value of the white calibration plate 5 and the spectral intensity value of the sample.

[0051] In the present invention, a first diffuse reflection phototube 34, a second diffuse reflection phototube 35 and a third diffuse reflection phototube 36 for detecting the position of the filter rod 6 are respectively provided at the feed end 27 of the filter rod transmission channel 26, the filter rod transmission channel 26 at the front end of the near-infrared detection module 2 and the discharge end 33 of the filter rod transmission channel 26. By setting the first diffuse reflection phototube 34, the second diffuse reflection phototube 35 and the third diffuse reflection phototube 36, the movement of the filter rod 6 into position can be detected. The specific operation is that when the first diffuse reflection phototube 34 detects that the filter rod 6 is placed in place, the first diffuse reflection phototube 34 transmits a signal to the control chip 37, the control chip 37 drives the filter rod conveying drive motor 10 to rotate, and the filter rod 6 moves toward the near-infrared detection module 2. When the second diffuse reflection phototube 35 at the front end of the near-infrared detection module 2 detects that the front end of the filter rod 6 has moved into position, the second diffuse reflection phototube 35 transmits a signal to the control chip 37, and the control chip 37 controls the near-infrared detection module 2 to emit near-infrared light to the filter rod 6 performs near-infrared scanning. When the second diffuse reflection phototube 35 at the front end of the near-infrared detection module 2 detects that the end of the filter rod 6 has moved into place, the second diffuse reflection phototube 35 transmits a signal to the control chip 37 again. The control chip 37 controls the near-infrared detection module 2 to stop emitting near-infrared light. In this way, the entire filter rod 6 can be completely scanned, and the near-infrared light will not scan the gap between the front and rear filter rods 6 to be detected. When the third diffuse reflection phototube 36 detects that the end of the filter rod 6 has moved into place, the third diffuse reflection phototube 36 sends a signal to the control chip 37. The control chip 37 controls the filter rod conveying drive motor 10 to stop rotating. In the present invention, the near-infrared detection module 2 is arranged on the control chip 37, and the control chip 37 is arranged on the mounting and fixing plate 1. Among them, the background plate 3 is made of metal material. The background plate 3 made of metal material can better reflect the near-infrared light, so that it is convenient for the near-infrared detection lens 9 to receive it and detect the various components of the filter rod 6 and the specific content of each component.

[0052] In the present invention, a control method for a near-infrared filter rod detection device is disclosed, comprising the following steps:

[0053] In step 1, the automatic calibrator 4 pushes the calibration plate 5 onto the near-infrared detection module 2 and fits the calibration plate 5 with the near-infrared detection lens 9. The near-infrared detection module 2 performs baseline calibration using the calibration plate 5 to eliminate interference from the environment and photons.

[0054] Step 2: Peel off the wrapping paper on the surface of the filter rod 6, leaving only the fiber rod in the middle of the filter rod;

[0055] Step 3: Place the fiber rod obtained in step 2 in the filter rod transmission channel 26. The first diffuse reflection photoelectric tube 34 detects that the fiber rod is in place. The first diffuse reflection photoelectric tube 34 transmits a signal to the control chip 37. The control chip 37 drives the filter rod conveying drive motor 10 to rotate, and the fiber rod moves toward the near-infrared detection module 2.

[0056] Step 4: The trumpet-shaped feed end 27 of the filter rod transmission channel 26 presses the fiber rod into a flat fiber rod;

[0057] Step 5: When the second diffuse reflection photoelectric tube at the front end of the near-infrared detection module 2 detects that the front end of the fiber rod has moved into position, the second diffuse reflection photoelectric tube 35 transmits a signal to the control chip 37. The control chip 37 sends a near-infrared light delay start signal to the near-infrared detection module 2 according to the moving speed of the fiber rod. After receiving the near-infrared light delay start signal, the near-infrared detection module 2 starts emitting near-infrared light after the delay time ends. The near-infrared light passes through the fiber rod and is reflected by the background plate 3 before being received by the near-infrared detection lens 9.

[0058] Step 6: When the second diffuse reflection photoelectric tube 35 at the front end of the near-infrared detection module 2 detects that the end of the fiber rod has moved into position, the second diffuse reflection photoelectric tube 35 transmits a signal to the control chip. The control chip 37 sends a near-infrared light delay stop signal to the near-infrared detection module 2 according to the moving speed of the fiber rod. After receiving the near-infrared light delay stop signal, the near-infrared detection module 2 stops emitting near-infrared light after the delay time ends.

[0059] Step 7: When the third diffuse reflection photoelectric tube 36 detects that the end of the fiber rod has moved into position, the third diffuse reflection photoelectric tube 36 transmits a signal to the control chip 37, and the control chip 37 controls the filter rod 6 conveying drive motor 10 to stop rotating.

[0060] Example

[0061] In this embodiment, when the near-infrared detection module starts to perform near-infrared scanning on the filter rod, or after the near-infrared detection module has been used for a period of time, the operator will control the automatic calibrator to push the calibration plate to the near-infrared detection module and make the calibration plate fit the near-infrared detection lens, so that the near-infrared detection module can perform baseline calibration through the calibration plate to eliminate interference from the environment and photons.

[0062] Since the conveying devices are arranged in sections on the mounting plate, and adjacent conveying devices are connected via linkages, only one filter rod conveying drive motor is needed to synchronously drive multiple sectioned conveying devices.

[0063] By setting the conveying device into a segmented structure, a near-infrared detection module, a background plate and an automatic calibrator for detecting filter rods can be set between adjacent conveying devices. Through the setting of the automatic calibrator and the calibration plate, the near-infrared detection module can be automatically calibrated to eliminate interference from the environment and photons. After the automatic calibration, the near-infrared detection module can perform near-infrared scanning on the filter rod, and the background plate can reflect the near-infrared light passing through the filter rod, which can reduce interference and improve detection accuracy, thereby ensuring that the near-infrared detection module can accurately detect the composition and content ratio of various substances in the filter rod.

[0064] In the figure, the description of the positional relationship is only for illustrative purposes and should not be understood as a limitation on this patent; obviously, the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not limitations on the implementation methods of the present invention. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made on the basis of the above description. It is not necessary and impossible to list all the implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the claims of the present invention.

Claims

1. A near-infrared filter rod detection device, comprising a mounting plate, a near-infrared detection module, a background plate, an automatic calibrator, a calibration plate, and a conveying device for conveying filter rods, characterized in that: The conveying device is arranged in sections on the mounting plate; The near-infrared detection module and the background plate are respectively arranged on the upper and lower sides between the adjacent conveying devices. The near-infrared detection module is provided with a near-infrared light source for emitting near-infrared light and a near-infrared detection lens for receiving near-infrared light. The near-infrared light emitted by the near-infrared light source passes through the fiber rod and is reflected by the background plate, and then is received by the near-infrared detection lens. The automatic calibrator is arranged on a background plate, and pushes the calibration plate to the near-infrared detection lens to automatically calibrate the near-infrared detection module.

2. The near-infrared filter rod detection device according to claim 1, characterized in that: The conveying device includes a filter rod conveying drive motor, a first transmission wheel, a second transmission wheel, a third transmission wheel, a fourth transmission wheel, a first transmission belt, and a second transmission belt; The first transmission wheel, the second transmission wheel, the third transmission wheel and the fourth transmission wheel are arranged at the same height of the mounting plate; The filter rod conveying drive motor is connected to the first transmission wheel, the first transmission belt is sleeved between the first transmission wheel and the second transmission wheel, and the second transmission belt is sleeved between the third transmission wheel and the fourth transmission wheel; The second transmission wheel and the third transmission wheel are connected via a linkage.

3. The near-infrared filter rod detection device according to claim 2, characterized in that: The linkage comprises a first linkage shaft, a second linkage shaft, a first linkage wheel, a second linkage wheel and a linkage belt; A connecting hole is provided on the mounting plate, one end of the first linkage shaft is connected to the second transmission wheel, and the other end is connected to the first linkage wheel after passing through the connecting hole of the mounting plate. One end of the second linkage shaft is connected to the third transmission wheel, and the other end is connected to the second linkage wheel after passing through the connecting hole of the mounting plate. The linkage belt is sleeved on the outside of the first linkage wheel and the second linkage wheel.

4. The near-infrared filter rod detection device according to claim 2, characterized in that: The mounting plate is provided with an upper pressure plate and side baffles for limiting the movement of the filter rod. The inner surfaces of the upper pressure plate and the side baffles and the upper surfaces of the first transmission belt and the second transmission belt form a filter rod transmission channel. The near-infrared detection lens is coplanar with the inner surface of the upper pressure plate.

5. The near-infrared filter rod detection device according to claim 4, characterized in that: The feed end of the filter rod transmission channel is trumpet-shaped.

6. The near-infrared filter rod detection device according to claim 1, characterized in that: The automatic calibrator includes a calibrator mounting base, an electric push rod, a push rod connecting block and a push rod slide for placing a calibration plate; The calibrator mounting seat is arranged on the background plate, and the electric push rod is arranged on the calibrator mounting seat; The electric push rod is connected to the push rod sliding seat through a push rod connecting block.

7. The near-infrared filter rod detection device according to claim 6, characterized in that: Limiting plates for guiding the pushing of the push rod slide are provided on both sides of the calibrator mounting seat.

8. The near-infrared filter rod detection device according to claim 4, characterized in that: The feed end of the filter rod transmission channel, the filter rod transmission channel at the front end of the near-infrared detection module, and the discharge end of the filter rod transmission channel are respectively provided with a first diffuse reflection phototube, a second diffuse reflection phototube, and a third diffuse reflection phototube for detecting the position of the filter rod.

9. The near-infrared filter rod detection device according to claim 1, characterized in that: The background plate is made of metal material.

10. A control method using the near-infrared filter rod detection device according to any one of claims 1 to 9, characterized in that: The following steps are involved: Step 1: The automatic calibrator pushes the calibration plate onto the near-infrared detection module and fits the calibration plate to the near-infrared detection lens. The near-infrared detection module performs baseline calibration using the calibration plate to eliminate interference from the environment and photons. Step 2: Peel off the wrapping paper on the surface of the filter rod, leaving only the fiber rod in the middle of the filter rod; Step 3: Place the fiber rod obtained in Step 2 in the filter rod transmission channel. The first diffuse reflection photoelectric tube detects that the fiber rod is in place, and the first diffuse reflection photoelectric tube transmits a signal to the control chip. The control chip drives the filter rod conveying drive motor to rotate, and the fiber rod moves toward the near-infrared detection module. Step 4: The trumpet-shaped feeding end of the filter rod transmission channel presses the fiber rod into a flat fiber rod; Step 5: When the second diffuse reflection photoelectric tube at the front end of the near-infrared detection module detects that the front end of the fiber rod has moved into position, the second diffuse reflection photoelectric tube transmits a signal to the control chip. The control chip sends a near-infrared light delay start signal to the near-infrared detection module based on the moving speed of the fiber rod. After receiving the near-infrared light delay start signal, the near-infrared detection module starts emitting near-infrared light after the delay time expires. The near-infrared light passes through the fiber rod and is reflected by the background plate before being received by the near-infrared detection lens. Step 6: When the second diffuse reflection photoelectric tube at the front end of the near-infrared detection module detects that the end of the fiber rod has moved into position, the second diffuse reflection photoelectric tube transmits a signal to the control chip. The control chip sends a near-infrared light delay stop signal to the near-infrared detection module according to the moving speed of the fiber rod. After receiving the near-infrared light delay stop signal, the near-infrared detection module stops emitting near-infrared light after the delay time ends. Step 7: When the third diffuse reflection photoelectric tube detects that the end of the fiber rod has moved into position, the third diffuse reflection photoelectric tube transmits a signal to the control chip, and the control chip controls the filter rod conveying drive motor to stop rotating.

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