An online detection device fusing LDV and near infrared spectrum

Abstract

The application belongs to the technical field of nondestructive testing, and particularly relates to an online detection device fusing LDV and near-infrared spectrum, which is suitable for various large, medium and small enterprise assembly lines and is used by individual merchants or individuals, and comprises a detection assembly and a fixing assembly; the detection assembly comprises a plurality of detection modules; each left side wall of the detection modules is fixedly connected with an electrically-conductive insertion rod, and each right side wall of the detection modules is provided with an electrically-conductive insertion slot; the end of the electrically-conductive insertion rod and the bottom of the electrically-conductive insertion slot are fixedly connected with copper sheets; the bottom of the detection module is provided with an optical head of a laser vibration meter and a light source of a micro spectrometer; the application is selected by enterprises or individual merchants according to their own needs, is more suitable for the use environment, has stronger application range, and the plurality of detection modules are combined individually, so that when a single detection module is damaged, the detection module can be directly replaced, the maintenance cost is low, the maintenance time is short, and the assembly line work can be quickly recovered.

Description

Technical Field

[0001] This invention belongs to the field of nondestructive testing technology, specifically an online detection device that integrates LDV and near-infrared spectroscopy. Background Technology

[0002] Laser Doppler Vibrometry (LDV) is a non-contact technique for measuring the vibration of objects. It uses a laser beam to illuminate a target object and measures the frequency shift of the scattered light to obtain information about the vibration of the object's surface. LDV measures the velocity and frequency of the object's vibration through the Doppler effect, and can provide high-precision and high-sensitivity vibration measurements.

[0003] When laser Doppler vibration measurement (LDV) is used to detect apple core rot, its function is to determine the presence of core rot by measuring the vibration characteristics of the apple. The following is the role of LDV in the detection of apple core rot:

[0004] 1. Detecting abnormal vibrations: Apple core rot usually causes abnormal tissue structure and decay inside the fruit, which may lead to changes in the vibration characteristics of the fruit. LDV can measure the tiny vibrations on the surface of the apple and capture the vibration abnormalities caused by core rot. By measuring the vibration data of the apple with LDV, the changes caused by core rot can be detected.

[0005] 2. Quantitative measurement: LDV can provide quantitative measurement of the vibration characteristics of apples; it can measure parameters such as vibration frequency, vibration amplitude and vibration mode on the apple surface. By comparing with normal apples, the difference between the vibration characteristics caused by core rot and the normal state can be determined.

[0006] 3. Non-invasive testing: LDV is a non-contact measurement technology that does not require direct contact with the apple surface, thus enabling non-invasive testing. This is crucial for maintaining the integrity of the apple and reducing the risk of infection.

[0007] 4. Provide reference data: LDV measurement results can be used as reference data to establish the correlation between apple core rot and vibration characteristics. Through LDV measurement and correlation analysis of a large number of samples, a vibration characteristic model of core rot can be established, providing reference and basis for the detection of apple core rot.

[0008] Near-infrared (NIR) spectrometry is an instrument used to analyze the near-infrared spectra of substances. Its working principle is based on the energy absorption phenomenon that occurs when near-infrared light interacts with matter. It sends a beam of near-infrared light onto a sample and then measures the sample's absorption or reflection of the light, thus obtaining the sample's spectrum within the near-infrared spectral range. NIR spectrometry is a non-destructive analytical technique, typically requiring no pretreatment or destructive chemical reactions of the sample; this makes it ideal for rapid, non-invasive material analysis. The following are some applications of near-infrared transmission spectroscopy in the detection of apple core rot:

[0009] 1. Changes in material composition: Apple core rot causes changes in the chemical composition of the fruit's internal tissues. Near-infrared transmission spectroscopy can provide chemical information about the sample, including the content and proportion of substances such as moisture, sugar, and organic acids. By analyzing near-infrared spectra, the differences in composition between diseased and healthy areas can be detected, providing a basis for the detection of core rot.

[0010] 2. Data Analysis and Model Building: By collecting near-infrared transmission spectral data from a large number of apple samples and comparing and analyzing them with corresponding pathological data, predictive models can be established. Based on these models, new near-infrared transmission spectral data can be input into the models for prediction and judgment, thereby achieving non-destructive detection of apple core rot.

[0011] Currently, non-destructive testing of fruits typically uses a single infrared spectroscopy method, with very few instances of combining infrared spectroscopy with vibration measurement. While some fruits are tested using handheld spectrometers, others are tested using large-scale automated production lines. Handheld spectrometers, with their simple structure, can only test individual fruits and are therefore unsuitable for scenarios with many fruits, resulting in a narrow range of applications.

[0012] While the testing equipment on the production line can test fruits in batches, its sophisticated testing structure and high cost make it unsuitable for businesses of varying sizes in the current market. Furthermore, when the equipment malfunctions, it requires professional technicians for repair, resulting in high repair and maintenance costs. Repairing the entire machine requires disassembly, which takes a significant amount of time from disassembly to problem identification, resolution, and reassembly, leading to prolonged production line downtime and substantial losses.

[0013] To overcome the above difficulties, developing an online detection device that is widely applicable, has low maintenance costs, short processing time, and high detection accuracy is a key research and development focus for many companies. Summary of the Invention

[0014] To address the shortcomings and solve the problems of high maintenance costs and long maintenance times of existing online detection devices, this invention proposes an online detection device that integrates LDV and near-infrared spectroscopy.

[0015] The technical solution adopted by the present invention to solve its technical problem is: the online detection device that integrates LDV and near-infrared spectroscopy, as described in the present invention, is suitable for various large, medium and small enterprise production lines and individual merchants' self-use, including detection components and fixing components;

[0016] The detection assembly includes multiple detection modules; each detection module has a conductive rod fixedly connected to its left side wall and a conductive slot opened on its right side wall; copper plates are fixedly connected to the ends of the conductive rods and the bottoms of the conductive slots, and the copper plates at the ends of the conductive rods are inserted into the corresponding conductive slots and electrically connected to the copper plates inside; the conductive rods and conductive slots in the detection modules are designed to cooperate with adjacent detection modules; the bottom of each detection module is provided with the optical head of a laser vibrometer and the light source of a miniature spectrometer, and the optical head of the laser vibrometer and the light source of the miniature spectrometer are electrically connected in parallel with the copper plates, so that each detection module... The optical head of the laser vibrometer and the light source of the miniature spectrometer in the measurement module do not interfere with each other; the detection component also includes a controller connected to the fixed component and a collimating lens for receiving the light signal after the light source penetrates the object to be tested. The collimating lens is installed on the assembly line frame at the position of the light source of the miniature spectrometer or in the tray supporting the object to be tested; the controller is used to process the information fed back by the collimating lens and the signal reflected back to the laser Doppler vibrometer after the laser emitted by the laser senses the vibration of the object to be tested, and feed it back to the computer. After processing by the computer software, the signal is visualized.

[0017] The fixing component is used to fix the multiple detection modules after they are electrically connected to each other.

[0018] Preferably, the fixing component includes a top plate, a fixing plate, and a sliding plate; the lower surface of the top plate has a mounting groove that extends through both the left and right sides; the mounting groove has a T-shaped design; the fixing plate is fixed to the left side of the lower surface of the top plate; the sliding plate is slidably disposed on the right side of the fixing plate through the mounting groove; and the detection module is located between the fixing plate and the sliding plate.

[0019] Preferably, a reinforcing plate is slidably connected inside the mounting groove; a plurality of first fastening bolts are threadedly connected to the surface of the top plate, and the first fastening bolts pass through the top plate and are rotatably connected to the surface of the reinforcing plate.

[0020] Preferably, it also includes an external component; the external component includes an external plate; an external rod is fixedly connected to the left end of the external plate; an external groove that mates with the external rod is provided on the right side wall of the top plate; and an installation groove corresponding to the lower surface of the top plate is also provided on the lower surface of the external plate.

[0021] Preferably, the top surface of the top plate is threadedly connected to the outer groove with a second fastening bolt, the end of the second fastening bolt being inserted into the outer groove.

[0022] Preferably, there are two conductive rods and two conductive slots, arranged vertically; an auxiliary block is fixedly connected between the two conductive rods of the same detection module to the side wall of the detection module; an auxiliary groove that cooperates with the auxiliary block is opened between the two conductive slots of the same detection module to the side wall of the detection module.

[0023] Preferably, the conductive rod includes a sliding rod and a fixed rod; the sliding rod is slidably sleeved on the surface of the fixed rod, and the copper sheet is located at the end of the sliding rod away from the fixed rod; a spring is fixedly connected between the end of the fixed rod and the bottom of the sliding rod, and a slack conductor is provided inside the spring coil, the conductor being electrically connected to the copper sheet and the optical head of the laser vibrometer and the light source of the miniature spectrometer.

[0024] Preferably, the length of the conductive insert is greater than the depth of the conductive slot when the spring is relaxed.

[0025] Preferably, a rubber gasket is provided between two adjacent detection modules.

[0026] Preferably, the top plate has a lifting groove on its upper surface; the lifting groove is T-shaped, and a lifting block is slidably connected inside the lifting groove, with a pull ring fixed to the upper surface of the lifting block by a rope.

[0027] Preferably, it also includes a mounting component; the mounting component is used to mount the detection component, the fixing component and the external component on the production line. The mounting component can be a fixing frame or an external frame, which is the prior art and will not be described in detail here.

[0028] Preferably, a telescopic component is provided on the mounting component. The telescopic component can be an electric telescopic rod, a cylinder, etc., to realize the overall lifting and lowering of the detection component, the fixing component, and the external component, so that the detection module is close to the individual to be tested. The telescopic component is existing technology and will not be described in detail here.

[0029] Preferably, the online detection device is configured with multiple groups in a vertical direction, which can be arranged in an array as needed. The multiple groups of detection devices are connected by connectors, which can be existing technologies such as buckles, cable ties, and ropes, and will not be described in detail here.

[0030] Preferably, a soft washer is fixed to the bottom of the detection module. The soft washer has a horn-shaped design, and the optical head of the laser vibrometer and the light source of the miniature spectrometer are both located in the middle of the soft washer.

[0031] The beneficial effects of this invention are as follows:

[0032] 1. The online detection device integrating LDV and near-infrared spectroscopy described in this invention uses multiple detection modules of the detection component, which can be selected appropriately by enterprises or individual merchants according to their own needs. This makes it more suitable for the use environment and has a wider range of applications. Moreover, the individual combination of multiple detection modules allows for direct replacement when a single detection module is damaged, resulting in low repair and maintenance costs and short time, and enabling faster restoration of production line operation.

[0033] 2. The online detection device integrating LDV and near-infrared spectroscopy described in this invention uses the cooperation of mounting slots, reinforcing plates, first fastening bolts, auxiliary blocks, and auxiliary slots to clamp and fix two adjacent detection modules, avoiding damage caused by friction between detection modules due to vibration or translation of the equipment during the detection process, and improving service life.

[0034] 3. The online detection device integrating LDV and near-infrared spectroscopy described in this invention includes a conductive plug comprising a sliding rod and a fixed rod, along with a spring and a rubber pad. This allows the user to adjust the distance between two adjacent detection modules according to changes in the production line or other operating environment, further expanding the applicability. At the same time, the rubber pad further prevents damage caused by friction between detection modules due to vibration or translation of the equipment during the detection process, thus extending the service life. Attached Figure Description

[0035] The invention will now be further described with reference to the accompanying drawings.

[0036] Figure 1 This is a 3D view of a single online detection device;

[0037] Figure 2 This is a 3D view of a single-line detection device with added rubber gaskets;

[0038] Figure 3 This is a perspective view of the external components of the present invention;

[0039] Figure 4 This is a first-angle perspective view of the detection module of the present invention;

[0040] Figure 5 This is a second-angle perspective view of the detection module of the present invention;

[0041] Figure 6 This is a cross-sectional view of the conductive insert of the present invention;

[0042] Figure 7 This is a bottom view of the detection module of the present invention;

[0043] In the diagram: Detection component 1, Fixing component 2, Top plate 21, Fixing plate 22, Sliding plate 23, Mounting groove 24, Reinforcing plate 25, First fastening bolt 26, Detection module 3, Conductive insertion rod 31, Sliding rod 311, Fixing rod 312, Spring 313, Conductive slot 32, Auxiliary block 33, Auxiliary groove 34, Rubber gasket 35, Lifting groove 36, Lifting block 37, Fixed pull ring 38, Soft washer 39, External component 4, External plate 41, External rod 42, External groove 43, Second fastening bolt 44. Detailed Implementation

[0044] like Figure 1-7 As shown, the present invention provides an online detection device that integrates LDV and near-infrared spectroscopy. This online detection device is suitable for various large, medium and small enterprise production lines and individual business use, and includes a detection component 1 and a fixing component 2.

[0045] The detection component 1 includes multiple detection modules 3; each detection module 3 has a conductive rod 31 fixedly connected to its left side wall and a conductive slot 32 opened on its right side wall; copper plates are fixedly connected to the ends of the conductive rods 31 and the bottoms of the conductive slots 32, and the copper plates at the ends of the conductive rods 31 are inserted into the corresponding conductive slots 32 and electrically connected to the copper plates inside; the conductive rods 31 and conductive slots 32 in the detection modules 3 are designed to cooperate with adjacent detection modules 3; the bottom of the detection module 3 is provided with the optical head of a laser vibrometer and the light source of a miniature spectrometer, and the optical head of the laser vibrometer and the light source of the miniature spectrometer are electrically connected in parallel with the copper plates, so that... The optical head of the laser vibrometer and the light source of the miniature spectrometer in each detection module 3 do not interfere with each other; the detection component 1 also includes a controller connected to the fixed component 2 and a collimating lens for receiving the light signal after the light source penetrates the object to be detected. The collimating lens is installed on the assembly line frame at the position of the light source of the miniature spectrometer or in the tray supporting the object to be detected. The collimating lens is electrically connected to the controller; the controller is used to process the information fed back by the collimating lens and the signal reflected back to the laser Doppler vibrometer after the laser emitted by the laser senses the vibration of the object to be detected, and feed it back to the computer. After processing by the computer software, visualization is achieved;

[0046] The fixing component 2 is used to fix the multiple detection modules 3 after they are electrically connected to each other.

[0047] During operation, the user selects the appropriate number of detection modules 3 according to their needs. First, the conductive rod 31 of the first detection module 3 is inserted into the preset electrical connection port on the fixing component 2. The electrical connection port is electrically connected to the external controller via an external wire, or the conductive rod 31 of the first detection module 3 is directly electrically connected to the external controller. Then, the conductive rod 31 of the second detection module 3 is inserted into the conductive slot 32 of the first detection module 3 in sequence. The required number of detection modules 3 are installed in sequence. After the detection modules 3 are installed, the fixing component 2 is used to secure the entire detection module 3 assembly. Once fixed and powered on, the laser vibrometer's optical head and miniature spectrometer sequentially detect fruits or other items, avoiding interference between the laser from the laser vibrometer and the infrared light signal from the miniature spectrometer. This results in higher detection accuracy and a more comprehensive range. Furthermore, the combination of multiple detection modules 3 in the detection component 1 allows businesses or individual merchants to select the appropriate number based on their needs, making it more suitable for the usage environment and applicable to a wider range of situations. Additionally, the individual combination of multiple detection modules 3 allows for direct replacement when a single detection module 3 is damaged, resulting in low repair and maintenance costs, short repair time, and faster restoration of the production line.

[0048] In one specific embodiment of the present invention, the fixing component 2 includes a top plate 21, a fixing plate 22, and a sliding plate 23; the lower surface of the top plate 21 is provided with a mounting groove 24 that runs through both the left and right sides; the mounting groove 24 is T-shaped; the fixing plate 22 is fixedly connected to the left side of the lower surface of the top plate 21, and the fixing plate 22 is provided with an electrical connection port for an electrical connection controller; the sliding plate 23 is slidably disposed on the right side of the fixing plate 22 through the mounting groove 24; the detection module 3 is located between the fixing plate 22 and the sliding plate 23.

[0049] During operation, after the detection module 3 is installed sequentially through the mounting slot 24, the sliding plate 23 is installed through the mounting slot 24. The T-shaped design of the mounting slot 24 simplifies the installation steps of the detection module 3 and improves installation efficiency. At the same time, it ensures that the conductive rod 31 and the conductive slot 32 are automatically aligned during installation. Personnel can directly slide the detection module 3 to insert the conductive rod 31 into the conductive slot 32, which is convenient, quick, and easy to disassemble, further reducing maintenance time.

[0050] In one specific embodiment of the present invention, a reinforcing plate 25 is slidably connected inside the mounting groove 24; a plurality of first fastening bolts 26 are threadedly connected to the surface of the top plate 21, and the first fastening bolts 26 pass through the top plate 21 and are rotatably connected to the surface of the reinforcing plate 25; during operation, after all the detection modules 3 are installed and the sliding plate 23 is installed, the first fixing bolts 26 are manually tightened to move the reinforcing plate 25 into the mounting groove 24, thereby reinforcing and fixing the sliding plate 23 and the detection module 3. The operation is simple and convenient.

[0051] As a specific embodiment of the present invention, it also includes an external component 4; the external component 4 includes an external plate 41; an external rod 42 is fixedly connected to the left end of the external plate 41; an external groove 43 that mates with the external rod 42 is provided on the right side wall of the top plate 21; an installation groove 24 corresponding to the lower surface of the top plate 21 is also provided on the lower surface of the external plate 41, and a reinforcing plate 25 is also provided in the installation groove 24, and a first fastening bolt 26 is provided on the external plate 41 to adjust the reinforcing plate 25; an external groove 43 is also provided in the right side wall of the external plate 41; when the user needs the detection device to be longer laterally or to arrange more detection modules 3, the external rod 42 on the left side of the external plate 41 is inserted into the external groove 43 through the external component 4, so that the installation groove 24 on the lower surface of the external plate 41 corresponds to the installation groove 24 on the lower surface of the top plate 21, thereby achieving lateral lengthening and further improving the applicable range.

[0052] In one specific embodiment of the present invention, a second fastening bolt 44 is threadedly connected to the upper surface of the top plate 21 at the external groove 43, and the end of the second fastening bolt 44 is inserted into the external groove 43; during operation, after the external rod 42 is inserted into the external groove 43, the external rod 42 is pressed and fixed by manually tightening the second fastening bolt 44.

[0053] In one specific embodiment of the present invention, there are two conductive rods 31 and two conductive slots 32, arranged vertically. An auxiliary block 33 is fixedly connected between the two conductive rods 31 of the same detection module 3 to the side wall of the detection module 3. An auxiliary groove 34 that cooperates with the auxiliary block 33 is opened between the two conductive slots 32 of the same detection module 3 to the side wall of the detection module 3. The arrangement of two conductive rods 31 and two conductive slots 32 can effectively improve the connection strength between the detection modules 3. At the same time, during the installation of the detection module 3, the auxiliary block 33 is inserted into the auxiliary groove 34, which further improves the connection strength between the detection modules 3, avoids relative displacement and friction between the detection modules 3 causing damage, and improves the service life. At the same time, the arrangement of the auxiliary block 33 and the auxiliary groove 34 can reduce the force between the conductive rods 31 and the conductive slots 32, avoid excessive displacement force of the detection module 3 causing damage to the conductive rods 31 and the conductive slots 32, and further improve the service life.

[0054] In one specific embodiment of the present invention, the conductive plug 31 includes a sliding rod 311 and a fixed rod 312; the sliding rod 311 is slidably sleeved on the surface of the fixed rod 312, and the copper sheet is located at the end of the sliding rod 311 away from the fixed rod 312; a spring 313 is fixedly connected between the end of the fixed rod 312 and the bottom of the sliding rod 311, and a slack conductor is provided inside the spring 313 coil, which is electrically connected to the copper sheet and the optical head of the laser vibrometer and the light source of the miniature spectrometer; during operation, the sliding connection between the sliding rod 311 and the fixed rod 312, and the setting of the spring 313, effectively increase the squeezing force between the copper sheets, improve the electrical contact effect, and further improve the shock absorption effect of the conductive plug 31, achieving effective buffering under the violent installation of the detection module 3, and improving the service life of the detection module 3 and the conductive plug 31.

[0055] In one specific embodiment of the present invention, the length of the conductive plug 31 is greater than the depth of the conductive slot 32 when the spring 313 is relaxed. During the installation of the detection module 3, the spring 313 is compressed, which plays an effective buffering role and improves the installation strength of the detection module 3.

[0056] As a specific embodiment of the present invention, a rubber pad 35 is provided between two adjacent detection modules 3. The user can adjust the distance between two adjacent detection modules 3 by increasing or decreasing the rubber pad 35 according to changes in the production line or other usage environment, corresponding to the distance between the objects to be detected on the production line, thereby further improving the applicability. At the same time, the rubber pad 35 further prevents the vibration or translation of the equipment during the detection process from causing friction between the detection modules 3 and resulting in damage, thus improving the service life.

[0057] In one specific embodiment of the present invention, a lifting groove 36 is provided on the upper surface of the top plate 21; the lifting groove 36 is T-shaped, and a lifting block 37 is slidably connected in the lifting groove 36. The upper surface of the lifting block 37 is fixed to a pull ring 38 by a rope. Depending on the usage scenario, it can be moved manually through the pull ring 38 or a detection device can be used. At the same time, the center of gravity can be adjusted by sliding the lifting block 37 according to the number of external components 4 and the change of the center of gravity during manual handling or use. The operation is simple and the handling and use are more labor-saving.

[0058] As a specific embodiment of the present invention, it also includes a mounting component; the mounting component is used to mount the detection component 1, the fixing component 2 and the external component 4 on the production line. The mounting component can be a fixing frame or an external frame, which is the prior art and will not be described in detail here.

[0059] As a specific embodiment of the present invention, a telescopic component is provided on the mounting component. The telescopic component can be an electric telescopic rod, a cylinder, etc., to realize the overall lifting and lowering of the detection component 1, the fixing component 2 and the external component 4, so that the detection module 3 is close to the individual to be tested, thereby improving the detection accuracy. The telescopic component is existing technology and will not be described in detail here.

[0060] As a specific embodiment of the present invention, the online detection device is provided with multiple groups in a vertical direction, which can be arranged in an array according to requirements. The multiple groups of detection devices are connected by connectors, which can be existing technologies such as buckles, cable ties, and ropes, and will not be described in detail here.

[0061] In one specific embodiment of the present invention, a soft washer 39 is fixedly connected to the bottom of the detection module 3. The soft washer 39 has a horn-shaped design, and the optical head of the laser vibrometer and the light source of the micro spectrometer are both located in the middle of the soft washer 39. The soft washer 39 effectively protects the optical head of the laser vibrometer and the light source of the micro spectrometer to avoid damage. At the same time, when the optical head of the laser vibrometer and the light source of the micro spectrometer move toward the object to be tested, the soft washer 39 buffers and reduces the damage rate of the object to be tested. In addition, the soft washer 39 forms a dark environment with the tray or the item support on the production line that supports the object to be tested, thereby improving the detection accuracy.

[0062] The above are merely preferred embodiments of the present invention and do not limit the scope of the patent. Any equivalent structural transformations made using the contents of the specification and drawings of the present invention under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the scope of patent protection of the present invention.

Claims

1. An online detection device integrating LDV and near-infrared spectroscopy, characterized in that, The system includes a detection component (1) and a fixing component (2); the detection component (1) includes multiple detection modules (3); each detection module (3) has a conductive rod (31) fixedly connected to its left side wall and a conductive slot (32) opened on its right side wall; the ends of the conductive rod (31) and the bottom of the conductive slot (32) are fixedly connected to copper sheets, and the copper sheets at the ends of the conductive rod (31) are inserted into the corresponding conductive slot (32) and electrically connected to the copper sheets inside. The conductive rod (31) and conductive slot (32) in the detection module (3) are designed to cooperate with each other with the adjacent detection module (3); the bottom of the detection module (3) is provided with the optical head of the laser vibrometer and the light source of the micro spectrometer, and the optical head of the laser vibrometer and the light source of the micro spectrometer are electrically connected in parallel with the copper sheets, so that the optical head of the laser vibrometer and the light source of the micro spectrometer in each detection module (3) do not interfere with each other. The detection component (1) also includes a controller connected to the fixed component (2) and a collimating lens for receiving the light signal after the light source penetrates the object being detected; the controller is used to process the information fed back by the collimating lens and the signal reflected back to the laser Doppler vibrometer after the laser emitted by the laser senses the vibration of the object being detected, and to feed it back to the computer. After processing by the computer software, the signal is visualized. The fixing component (2) is used to fix the multiple detection modules (3) after they are electrically connected to each other; The number of conductive plugs (31) and conductive slots (32) is two, and they are arranged vertically. An auxiliary block (33) is fixed between the two conductive plugs (31) of the same detection module (3) on the side wall of the detection module (3). An auxiliary groove (34) that cooperates with the auxiliary block (33) is opened between the two conductive slots (32) of the same detection module (3) on the side wall of the detection module (3). The conductive plug (31) includes a sliding rod (311) and a fixed rod (312); the sliding rod (311) is slidably sleeved on the surface of the fixed rod (312), and the copper sheet is located at the end of the sliding rod (311) away from the fixed rod (312); a spring (313) is fixedly connected between the end of the fixed rod (312) and the bottom of the sliding rod (311), and a slack wire is provided inside the spring (313) coil, which is electrically connected to the copper sheet and the optical head of the laser vibrometer and the light source of the miniature spectrometer.

2. The online detection device integrating LDV and near-infrared spectroscopy according to claim 1, characterized in that: The fixing component (2) includes a top plate (21), a fixing plate (22), and a sliding plate (23); the lower surface of the top plate (21) is provided with a mounting groove (24) that runs through the left and right sides; the mounting groove (24) is T-shaped; the fixing plate (22) is fixed to the left side of the lower surface of the top plate (21), and the fixing plate (22) is provided with an electrical connection port for an electrical connection controller; the sliding plate (23) is slidably disposed on the right side of the fixing plate (22) through the mounting groove (24); the detection module (3) is located between the fixing plate (22) and the sliding plate (23).

3. The online detection device integrating LDV and near-infrared spectroscopy according to claim 2, characterized in that: The mounting groove (24) is slidably connected to a reinforcing plate (25); the surface of the top plate (21) is connected to a plurality of first fastening bolts (26) by threads, and the first fastening bolts (26) pass through the top plate (21) and are rotatably connected to the surface of the reinforcing plate (25).

4. The online detection device integrating LDV and near-infrared spectroscopy according to claim 2, characterized in that: It also includes an external component (4); the external component (4) includes an external plate (41); an external rod (42) is fixedly connected to the left end of the external plate (41); an external groove (43) that mates with the external rod (42) is provided on the right side wall of the top plate (21); and an installation groove (24) corresponding to the lower surface of the top plate (21) is also provided on the lower surface of the external plate (41).

5. The online detection device integrating LDV and near-infrared spectroscopy according to claim 4, characterized in that: The top plate (21) has a second fastening bolt (44) threadedly connected to the outer groove (43) on its upper surface. The end of the second fastening bolt (44) is inserted into the outer groove (43).

6. The online detection device integrating LDV and near-infrared spectroscopy according to claim 1, characterized in that: The length of the conductive plug (31) is greater than the depth of the conductive slot (32) when the spring (313) is relaxed.

7. The online detection device integrating LDV and near-infrared spectroscopy according to claim 2, characterized in that: A rubber gasket (35) is provided between two adjacent detection modules (3).

8. The online detection device integrating LDV and near-infrared spectroscopy according to claim 4, characterized in that: The top plate (21) has a lifting groove (36) on its upper surface; the lifting groove (36) is T-shaped and a lifting block (37) is slidably connected inside the lifting groove (36), and the upper surface of the lifting block (37) is fixed with a pull ring (38) by a rope.

Images