An online detection device and method for flour processing

Abstract

This invention belongs to the field of flour processing technology, specifically an online detection device for flour processing. It includes multiple flour discharge chambers and a near-infrared analyzer that moves horizontally. Each flour discharge chamber has an inclined chute facing the near-infrared analyzer, and an optical window is positioned on the inclined surface of the chute. The probe of the near-infrared analyzer is perpendicular to the optical window. An electric push rod is connected to the outer wall of the near-infrared analyzer away from the inclined chute, and the extension direction of the electric push rod is perpendicular to the inclined surface of the chute. The electric push rod and the near-infrared analyzer can move along the distribution direction of the multiple flour discharge chambers. Guide plates are fixed on both sides of the outer wall of the inclined chute on both sides of the near-infrared analyzer. Before detection, the electric push rod pushes the probe of the near-infrared analyzer closer to the optical window, and the guide plates on both sides correct the near-infrared analyzer, thereby ensuring the accuracy and effectiveness of online detection of powder in the corresponding flour discharge chamber.

Description

Technical Field

[0001] This invention relates to the field of flour processing technology, and in particular to an online detection device and method for flour processing. Background Technology

[0002] In the production of flour and its deep processing, real-time and precise monitoring of key quality indicators of raw materials (wheat) and intermediate products (such as clean wheat entering the mill, various flour streams, and base flour) is the core link to ensure product quality stability, improve yield, and reduce energy consumption.

[0003] For a long time, the flour industry has generally adopted the traditional quality control model of online sampling and offline laboratory analysis. Now, with the advancement of the intelligent manufacturing wave, near-infrared online analysis systems are reshaping the quality control system of flour production with their disruptive technology. In the process of using near-infrared analyzers in flour processing systems, the alignment between the near-infrared analyzer and the optical window will affect the accuracy of online detection. Summary of the Invention

[0004] Based on the technical problems existing in the background art, the present invention proposes an online detection device and method for flour processing.

[0005] This invention proposes an online detection device for flour processing, comprising multiple flour discharge chambers and a near-infrared analyzer that moves horizontally. An inclined chute is provided on the end face of each flour discharge chamber facing the near-infrared analyzer, and an optical window is provided on the inclined surface of the chute. The probe of the near-infrared analyzer is perpendicularly oriented towards the optical window. An electric push rod is connected to the outer wall of the near-infrared analyzer away from the inclined chute, and the extension direction of the electric push rod is perpendicular to the inclined surface of the chute. The electric push rod and the near-infrared analyzer can move along the distribution direction of the multiple flour discharge chambers. Guide plates are fixed on both sides of the inclined surface of the chute on both sides of the near-infrared analyzer.

[0006] Furthermore, a guide rail and a conveyor belt are provided. A movable platform connected to the conveyor belt slides on the guide rail at its upper limit. An installation platform is fixed on the movable platform. A sliding platform is slidably installed on the installation platform. The sliding platform slides at its upper limit in the distribution direction of the multiple powder discharge chambers. A locking mechanism is provided between the sliding platform and the installation platform to lock the sliding platform and the installation platform.

[0007] Furthermore, the guide plate is provided with a fixing part, a limiting part and a guiding part. The limiting part is perpendicular to the outer wall of the inclined surface of the inclined chute. The distance between the two limiting parts is adapted to the housing part corresponding to the near-infrared analyzer. The distance between the two guiding parts gradually increases in the direction away from the limiting part.

[0008] Furthermore, mounting grooves are provided on the adjacent sides of the two guide plates. The mounting grooves cover both the limiting part and the guiding part. A gap is left between the mounting grooves and the edges of the guiding part away from the limiting part. An airbag is fixed in the mounting groove. A gasket is fixed on the outer wall of the near-infrared analyzer at the position corresponding to the guide plate.

[0009] Furthermore, it also includes a current monitoring unit, a gas pressure monitoring unit, and a processor; when the electric push rod pushes the near-infrared analyzer closer to the inclined chute:

[0010] The current monitoring unit is used to monitor the working current of the electric push rod; the air pressure monitoring unit is used to monitor the air pressure value of the two airbags; the processor determines the offset state of the near-infrared analyzer after it is horizontally moved to the work position based on the monitored working current and the air pressure value of the two airbags.

[0011] Furthermore, the top of the installation platform is fixed with two slide rails, and the bottom of the sliding platform is fixed with a slider at the position corresponding to the slide rail. The slider slides at the upper limit of the slide rail, and baffles are fixed at both ends of the slide rail in the extension direction.

[0012] Furthermore, an installation rod is installed between the telescopic shaft of the electric push rod and the near-infrared analyzer. A sliding hole is opened at the bottom of the installation rod, and a guide rod is slidably connected to the inner wall of the sliding hole. The guide rod is set perpendicular to the inclined chute, and the bottom end of the guide rod is fixed to the top of the sliding platform.

[0013] Furthermore, the locking mechanism is equipped with an electromagnetic block installed at the bottom of the sliding platform, and a magnetic absorbing plate is fixed at the top of the platform. The magnetic absorbing plate is long and extends horizontally in the distribution direction of the multiple powder outlet chambers.

[0014] The present invention proposes an online detection method for flour processing, comprising the following steps:

[0015] The conveyor belt stops at the near-infrared analyzer, aligning the analyzer's probe with the optical window. During this stop, the locking mechanism is released, and an electric push rod pushes the analyzer's probe closer to the optical window. Guide plates on both sides correct the analyzer's deviation along the conveyor belt's extension direction. After the electric push rod moves the analyzer a certain distance, it stops, and the locking mechanism locks the sliding platform and mounting platform. The near-infrared analyzer then performs online detection through the optical window. After detection, the electric push rod retracts the analyzer, and the conveyor belt moves it to the next detection station. The conveyor belt moves the near-infrared analyzer from the powder outlet chamber at the beginning to the powder outlet chamber at the end, and then back from the end to the beginning.

[0016] Furthermore, during the process of the electric push rod pushing the near-infrared analyzer closer to the optical window, the working current of the electric push rod and the air pressure values ​​of the two airbags are collected; the comprehensive offset index is calculated based on the collected working current and the air pressure values ​​of the two airbags, and the offset state of the near-infrared analyzer is determined based on the comprehensive offset index; when the comprehensive offset index reaches the first preset threshold, a warning signal is issued, and when the comprehensive offset index reaches the second preset threshold, an alarm signal is issued.

[0017] The beneficial effects of this invention are as follows:

[0018] 1. In this invention, before detection, the probe of the near-infrared analyzer is pushed closer to the optical window by an electric push rod. Since the electric push rod and the near-infrared analyzer can move in the horizontal direction, the near-infrared analyzer can be corrected by the guide plates on both sides, thereby ensuring the accuracy and effectiveness of online detection of powder in the corresponding powder outlet chamber.

[0019] 2. In this invention, the inflatable airbag can limit the near-infrared analyzer while preventing hard contact from causing the electric push rod to jam and damage the near-infrared analyzer.

[0020] 3. In this invention, locking is achieved by magnetic attraction, which fundamentally avoids jamming or stuck failures caused by dust intrusion, mechanical deformation or lubrication failure. Compared with complex pneumatic or hydraulic locking mechanisms, the structure of the electromagnetic block and magnetic plate is extremely simple, requiring no additional pipelines, valves or seals, and occupying little space.

[0021] 4. In this invention, the working current of the electric push rod is fused with the air pressure of the two airbags to achieve quantitative and comprehensive evaluation of the near-infrared analyzer's offset state, enabling the system to have predictive maintenance capabilities. This not only ensures the long-term accuracy and stability of online detection, but also improves the level of intelligent equipment operation and maintenance. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of an online detection device for flour processing proposed in Embodiment 1 of the present invention;

[0023] Figure 2 This is a schematic diagram of the position and structure of the near-infrared analyzer in an online detection device for flour processing according to Embodiment 1 of the present invention;

[0024] Figure 3 This is a schematic cross-sectional view of an online detection device for flour processing according to Embodiment 1 of the present invention;

[0025] Figure 4 This is a schematic diagram of the inclined chute position structure of an online detection device for flour processing proposed in this invention;

[0026] Figure 5 This is a schematic diagram of the guide plate structure of an online detection device for flour processing proposed in this invention;

[0027] Figure 6 This is a schematic diagram of the moving platform, mounting platform, and sliding platform of an online detection device for flour processing proposed in Embodiment 1 of the present invention;

[0028] Figure 7 This is a schematic diagram of the sliding platform structure of an online detection device for flour processing proposed in Embodiment 1 of the present invention;

[0029] Figure 8 This is a schematic diagram of the installation platform structure of an online detection device for flour processing proposed in Embodiment 1 of the present invention;

[0030] Figure 9 This is a schematic diagram of the slide rail structure of an online detection device for flour processing proposed in Embodiment 1 of the present invention;

[0031] Figure 10 This is a schematic diagram of the overall structure of an online detection device for flour processing according to Embodiment 2 of the present invention;

[0032] Figure 11 This is a schematic diagram of the position and structure of the near-infrared analyzer in an online detection device for flour processing according to Embodiment 2 of the present invention;

[0033] Figure 12 This is a schematic diagram of the mobile platform, mounting platform, and sliding platform of an online detection device for flour processing proposed in Embodiment 2 of the present invention.

[0034] In the diagram: 1. Powder outlet chamber, 2. Inclined chute, 3. Optical window, 4. Near-infrared analyzer, 5. Guide rail, 501. Support frame, 6. Conveyor belt, 7. Conveyor roller, 8. Drive motor, 9. Mounting platform, 10. Sliding platform, 11. Electric push rod, 12. Guide plate, 121. Fixing part, 122. Limiting part, 123. Guide part, 13. Airbag cushion, 14. Mounting rod, 15. Guide rod, 16. Fan, 17. Mounting bracket, 18. Gasket, 19. Moving platform, 20. Balance block, 21. Slide rail, 211. Slide groove, 22. Slider, 221. Slide bar, 23. Baffle, 24. Electromagnetic block, 25. Magnetic suction plate, 26. Cylinder, 27. Extrusion plate. Detailed Implementation

[0035] Reference Figures 1-9An online detection device for flour processing includes multiple flour discharge chambers 1 and a near-infrared analyzer 4 that moves horizontally. An inclined chute 2 is provided on the end face of the flour discharge chamber 1 facing the near-infrared analyzer 4. An optical window 3 is provided on the inclined surface of the inclined chute 2. The probe of the near-infrared analyzer 4 is perpendicularly facing the optical window 3. It should be noted that a flour discharge pipe is connected to the bottom of the inclined chute 2. Semi-finished or finished powder slides down the inner wall of the inclined surface of the inclined chute 2, passes through the optical window 3, and is discharged from the flour discharge pipe below the inclined chute 2, allowing detection by the near-infrared analyzer 4 through the optical window, corresponding to the external environment. Furthermore, the inclined chute 2s of the multiple flour discharge chambers 1 are kept flush, and the near-infrared analyzer 4 extends horizontally in the distribution direction of the multiple flour discharge chambers 1, allowing the near-infrared analyzer 4 to pass through each flour discharge chamber 1 sequentially. An electric push rod 11 is connected to the outer wall of the near-infrared analyzer 4 away from the inclined chute 2. The extension direction is perpendicular to the inclined surface of the chute 2. The electric push rod 11 and the near-infrared analyzer 4 can move in the distribution direction of multiple powder outlet chambers 1. The outer wall of the inclined surface of the chute 2 is fixed with guide plates 12 on both sides of the near-infrared analyzer 4. Both guide plates 12 are located above the optical window 3. When the electric push rod 11 pushes the near-infrared analyzer 4 close to the chute 2, the probe of the near-infrared analyzer 4 can be aligned with the optical window 3 through the two guide plates 12. In use, multiple powder outlet chambers 1 correspond to finished powders of different production lines or semi-finished powders of different sections. The near-infrared analyzer 4 and the electric push rod 11 move horizontally in the distribution direction of multiple powder outlet chambers 1, so that the probe interval of the near-infrared analyzer 4 corresponds to the optical window 3 of the corresponding powder outlet chamber 1. The near-infrared analyzer 4 detects the powder through the optical window 3 and feeds back to the upstream production line to realize online detection, improve the timeliness of detection correction, and realize multiple measurements with one machine.

[0036] Furthermore, during the horizontal movement of the near-infrared analyzer 4, the probe of the near-infrared analyzer 4 maintains a certain distance from the optical window 3. On the one hand, this avoids the guide plate 12 from blocking and affecting the movement of the near-infrared analyzer 4. On the other hand, it keeps the near-infrared analyzer 4 at a distance from the optical window during the horizontal movement to avoid contaminating the optical window 3. During or before the detection, the probe is moved closer to the optical window 3 by the electric push rod 11 to ensure the accuracy of the detection.

[0037] Furthermore, if the near-infrared analyzer 4 moves horizontally between multiple powder outlet chambers 1 for detection, the long-term operation vibration causes the conveying mechanism to shift, which will cause the probe and optical window 3 to shift, thus affecting the accuracy of the detection. When the electric push rod 11 moves the near-infrared analyzer 4 closer to the inclined chute 2, since the electric push rod 11 and the near-infrared analyzer 4 can move in the horizontal direction, the guide plates 12 on both sides can correct the near-infrared analyzer 4, thereby ensuring the accuracy and effectiveness of online detection of powder in the corresponding powder outlet chamber 1.

[0038] In this invention, the guide plate 12 is provided with an integrally formed fixing part 121, a limiting part 122, and a guiding part 123. The fixing part 121 is fixed to the inclined outer wall of the inclined chute 2, the limiting part 122 is connected to the fixing part 121, and the limiting part 122 is perpendicular to the inclined outer wall of the inclined chute 2. The distance between the two limiting parts 122 is adapted to the housing part corresponding to the near-infrared analyzer 4. The guiding part 123 is located at the position of the limiting part 12 away from the fixing part 121. The distance between the two guiding parts 123 gradually increases in the direction away from the limiting part 122. When the near-infrared analyzer 4 is deviated due to the incomplete delivery by the conveying mechanism, the near-infrared analyzer 4 can be corrected and calibrated by the guiding part 123 at the ends of the guide plates 12 on both sides, thereby improving the accuracy of each online detection.

[0039] In this invention, mounting grooves are provided on the adjacent sides of the two guide plates 12. These mounting grooves simultaneously cover the limiting part 122 and the guide part 123. A gap is left between the mounting grooves and the edges of the guide part 123 away from the limiting part 122. An airbag 13 is fixed inside the mounting groove. The outer wall of the airbag 13 is flush with the outer walls of the limiting part 122 and the guide part 123. A gasket 18 is fixed to the outer wall of the near-infrared analyzer 4 at a position corresponding to the guide plate 12. That is, the near-infrared analyzer 4 contacts the outer wall of the guide plate 12 and the airbag 13 through the gasket 18, thus avoiding damage to the casing of the near-infrared analyzer 4. To avoid excessive wear on the airbag cushion 13; during use, if the near-infrared analyzer 4 has a large offset distance, it can be initially guided by the solid part of the guide part 123 that is not covered by the airbag cushion 13. If the near-infrared analyzer 4 has a small offset distance or is guided by the solid part of the guide part 123 first, the pad 18 of the near-infrared analyzer 4 will contact the airbag cushion 13. The airbag cushion 13, which is inflated by air, can limit the near-infrared analyzer 4 while avoiding hard contact that could cause the electric push rod 11 to jam during the process of pushing the near-infrared analyzer 4 and damage the near-infrared analyzer 4.

[0040] In this invention, a guide rail 5 and a conveyor belt 6 are also provided. A movable platform 19 connected to the conveyor belt 6 is slidably mounted on the guide rail 5 at its upper limit. Specifically, multiple support frames 501 are installed at the bottom of the guide rail 5, and the guide rail 5 is mounted on the ground via the support frames 501. Conveyor rollers 7 are provided at both ends of the conveyor belt 6, and the conveyor rollers 7 are rotatably connected to the guide rail 5. A drive motor 8 is connected to the end of one of the conveyor rollers 7, thereby realizing the installation and driving of the guide rail 5 and the conveyor belt 6. An electric push rod 11 and a near-infrared analyzer 4 are mounted on the movable platform 19, enabling the horizontal movement of the near-infrared analyzer 4 and achieving multi-measurement with a single device. A mounting platform 9 is fixed on the movable platform 19, and a sliding platform 10 is slidably mounted on the mounting platform 9. The sliding platform 10 can be used for multiple... The powder discharge chamber 1 has an upper limit sliding direction. A locking mechanism is provided between the sliding platform 10 and the mounting platform 9. The locking mechanism can lock the sliding platform 10 and the mounting platform 9. During the horizontal movement of the near-infrared analyzer 4 by the conveyor belt 6 for repositioning, the locking mechanism locks the sliding platform 10 and the mounting platform 9 to prevent the near-infrared analyzer 4 from shifting due to inertia and affecting the detection. After reaching the detection station, there is no more inertia. Therefore, when the electric push rod 11 pushes the near-infrared analyzer 4, the locking mechanism is opened or released. Under the action of the guide plate 12, the sliding platform 10 can slide relative to the mounting platform 9 to correct the deviation. After correction, locking is used to maintain stability after correction.

[0041] In this invention, two slide rails 21 are fixed to the top of the mounting platform 9, and the slide rails 21 extend in the distribution direction of the multiple powder outlet chambers 1. A slider 22 is fixed at the bottom of the sliding platform 10 at a position corresponding to the slide rail 21. The slider 22 slides at the upper limit of the slide rail 21. Baffles 23 are fixed at both ends of the slide rail 21 in the extension direction. Specifically, a sliding groove is provided at the bottom of the slider 22. The top inner wall of the sliding groove slides in contact with the top outer wall of the slide rail 21, and the two inner walls of the sliding groove slide in contact with the two outer walls of the slide rail 21 respectively. The inner walls of both sides of the sliding groove are fixed with sliding strips 221, and the outer walls of both sides of the slide rail 21 are provided with sliding grooves 211 that are adapted to the sliding strips 221. The overlapping surfaces of the sliding strips 221 and the sliding grooves 211 are set into an arc-shaped structure. The cross section of the baffle 23 is larger than the cross section of the slide rail 21 so that the slider 22 can move within a certain range. In addition, a balance block 20 is fixed at the bottom of the installation platform 9 away from the inclined chute 2. The balance block 20 is used to ensure the stability of the moving platform 19 and the installation platform 9 when moving horizontally and when stationary.

[0042] In this invention, a mounting frame 17 is fixed on the sliding platform 10, and an electric push rod 11 is fixed to the mounting frame 17. A mounting rod 14 is installed between the telescopic shaft of the electric push rod 11 and the near-infrared analyzer 4. The mounting rod 14 is parallel to the inclined surface of the inclined chute 2. A fan 16 is fixed to the top of the mounting rod 14, and a sliding hole is opened at the bottom of the mounting rod 14. A guide rod 15 is slidably connected to the inner wall of the sliding hole. The guide rod 15 is perpendicular to the inclined chute 2, and the bottom end of the guide rod 15 is fixed to the top of the sliding platform 10, thereby realizing the installation of the electric push rod 11 and the near-infrared analyzer 4. The mounting rod 14 is sleeved on the outside of the guide rod 15, and the mounting rod 14 can slide relative to the guide rod 15. Thus, the guide rod 15 is used to provide auxiliary support for the mounting rod 14 and the near-infrared analyzer 4, avoiding complete reliance on the electric push rod 11 for support. This ensures the stability of the near-infrared analyzer 4 in horizontal movement and movement close to the inclined chute 2, thereby ensuring the stability and effectiveness of online detection.

[0043] Regarding the design of the locking mechanism:

[0044] Example 1: Refer to Figures 4-5 and Figures 10-12 An online detection device for flour processing includes a locking mechanism with a cylinder 26 fixed to an installation platform 9. A pressing plate 27 is fixed to the top of the cylinder 26. The cylinder 26 can push the pressing plate 27 to rise and contact the bottom of the sliding platform 10, thereby locking the sliding platform 10 and the installation platform 9 through increased friction.

[0045] Example 2: Refer to Figures 1-9 An online detection device for flour processing is disclosed. The locking mechanism includes an electromagnetic block 24 installed at the bottom of a sliding platform 10, and a magnetic absorbing plate 25 fixed at the top of the mounting platform 9. The magnetic absorbing plate 25 is elongated and extends horizontally in the distribution direction of multiple flour discharge chambers 1. When the electromagnetic block 24 is energized, it generates a magnetic attraction force with the magnetic absorbing plate 25 to increase the friction between the slider 22 and the slide rail 21, thereby achieving a locking effect that counteracts the horizontal movement inertia. The locking strength can be adjusted by increasing the magnetic attraction force of the electromagnetic block 24. Compared with the locking mechanism of Embodiment 1, the magnetic attraction method can reduce the magnetic attraction force to achieve relative sliding of the sliding platform 10 when the electric push rod 11 pushes the near-infrared analyzer 4, avoiding excessive collision during the correction process due to complete relaxation.

[0046] An online detection method for flour processing, based on the aforementioned online detection device for flour processing, includes the following steps:

[0047] Step 1, Movement and Coarse Positioning: The control system starts the drive motor 8, which drives the conveyor belt 6 to move the moving platform 19 and its mounting platform 9, sliding platform 10 and near-infrared analyzer 4 horizontally on the guide rail 5. According to the preset program, the near-infrared analyzer 4 is moved to the detection station corresponding to the powder discharge chamber 1 at the beginning. At this time, the probe of the near-infrared analyzer 4 is roughly aligned with the optical window 3 of the powder discharge chamber 1 in the horizontal direction.

[0048] Step 2, Station Switching and Lock Release: When the near-infrared analyzer 4 reaches the target detection station and stops moving, the control system first controls the locking mechanism to cut off power or weaken the magnetic force, releasing the locking state between the sliding platform 10 and the mounting platform 9, so that the sliding platform 10 can slide freely relative to the mounting platform 9 in the horizontal direction.

[0049] Step 3, Probe Advancement and Fine-tuning: The control system extends the electric push rod 11, pushing the near-infrared analyzer 4 towards the optical window 3 in a direction perpendicular to the inclined surface of the chute 2. During the advancement process, if the near-infrared analyzer 4 deviates horizontally due to the cumulative error of the conveyor belt 6 or the deviation of the stopping position, the housing of the near-infrared analyzer 4 or the gasket 18 on it will first contact the guide portion 123 of the guide plate 12 on the chute 2. Guided by the inclined surface of the guide portion 123, the near-infrared analyzer 4 will cause the sliding platform 10 to slide horizontally with a slight amplitude relative to the mounting platform 9 until the housing of the near-infrared analyzer 4 is completely between the limiting portions 122 of the two guide plates 12, achieving precise alignment of the probe. The electric push rod 11 continues to push to the preset detection distance and then stops.

[0050] Step 4, Detection and Locking: After the near-infrared analyzer 4 completes alignment and is in place, the control system controls the locking mechanism to be powered on again to lock the sliding platform 10 and the mounting platform 9, ensuring that the near-infrared analyzer 4 remains stable during the detection process. Subsequently, the near-infrared analyzer 4 performs online detection of the powder continuously flowing in the inclined chute 2 through the optical window 3, obtains the powder quality index data corresponding to the powder outlet chamber 1, and feeds back the detection results to the upstream production line control system in real time to guide the adjustment of production parameters.

[0051] Step 5, Probe Retraction and Repositioning: After the detection is completed, the control system controls the electric push rod 11 to retract, pulling the probe of the near-infrared analyzer 4 back from the optical window 3 to the initial position, so that it maintains a safe distance from the inclined chute 2, avoiding contamination or collision with the optical window 3 during subsequent movement.

[0052] Step Six, Cyclic Detection: The control system restarts the drive motor 8 and moves the near-infrared analyzer 4 to the detection station corresponding to the next powder outlet chamber 1 via the conveyor belt 6. Repeat steps two to five above to complete the online detection of all powder outlet chambers 1 in sequence. The detection sequence can be set according to process requirements. For example, it can move from the powder outlet chamber 1 at the beginning to the powder outlet chamber 1 at the end at intervals. After completing one cycle, it moves back from the end to the beginning at intervals to achieve periodic cyclic detection.

[0053] This method, through a process control that first releases the lock for movement correction and then locks it again for stable detection, cleverly combines mechanical structure and electrical control. It effectively solves the problem of positional deviation caused by inertia, vibration, or conveying errors during horizontal movement of the equipment, ensuring high-precision alignment of the probe and optical window in each detection cycle. The entire detection process is highly automated, efficient in repositioning, and accurate in positioning, truly achieving stable and reliable operation of multiple measurements on a single machine. It provides an efficient and accurate online quality monitoring method for flour processing production lines.

[0054] To further address the issue of horizontal movement of the near-infrared analyzer causing positional shifts due to prolonged equipment operation, which in turn affects detection accuracy, this application constructs a multi-parameter comprehensive evaluation model to quantitatively analyze and intelligently diagnose the equipment's operating status, thereby achieving accurate identification and graded early warning of equipment offset status.

[0055] It also includes a current monitoring unit, a barometric pressure monitoring unit, and a processor:

[0056] As the electric push rod 11 pushes the near-infrared analyzer 4 toward the inclined chute 2, the current monitoring unit is used to monitor the working current of the electric push rod 11 in real time, denoted as I;

[0057] The air pressure monitoring unit is used to monitor the air pressure values ​​of the two airbag cushions 13 in real time. The air pressure of the left airbag cushion is recorded as P1 and the air pressure of the right airbag cushion is recorded as P2.

[0058] The processor is connected in communication with the current monitoring unit, the air pressure monitoring unit, and the equipment's control system, such as the drive motor 8, the electric push rod 11, and the electromagnetic block 24.

[0059] The processor is configured to perform the following comprehensive computation and analysis logic:

[0060] I. Constructing a comprehensive offset index:

[0061] To quantitatively assess the offset state of the near-infrared analyzer 4 during propulsion, the processor first normalizes the three sets of raw data to eliminate the influence of dimensions, and then constructs a comprehensive offset index S. The specific calculation steps are as follows:

[0062] 1. Calculation of current offset component: Define the no-load working current of the electric push rod 11 as I0, the measured working current as I, and the current offset component C_I is calculated as follows: ;

[0063] This component reflects the additional resistance caused by the contact between the near-infrared analyzer 4 and the guide plate 12 or the airbag pad 13. The larger the value of C_I, the greater the contact resistance and the higher the possibility of offset.

[0064] 2. Calculation of air pressure difference component: Define the reference air pressure of the two airbag pads 13 as P0, that is, the static air pressure when not squeezed, and the measured air pressures are P1 and P2 respectively. The air pressure difference component C_P is calculated as follows: ;

[0065] This component reflects the uneven degree of extrusion of the near-infrared analyzer 4 on the two airbag pads 13. When the near-infrared analyzer 4 is properly centered, P1 and P2 should be basically equal, and C_P approaches zero; when an offset occurs, the airbag pad 13 on the offset side is squeezed and the air pressure increases, and C_P increases accordingly.

[0066] 3. Calculation of comprehensive offset index: Considering the current offset component and the air pressure difference component comprehensively, different weight coefficients α and β are assigned, where α + β = 1. The specific weights can be calibrated through experiments according to the actual operating characteristics of the equipment. For example, take α = 0.4 and β = 0.6, and calculate the comprehensive offset index S:

[0067] ;

[0068] The value of S comprehensively reflects the overall offset degree of the near-infrared analyzer 4 during the propulsion process and is a dimensionless quantification index.

[0069] II. Establish a hierarchical warning mechanism:

[0070] The processor compares the calculated comprehensive offset index S with multiple preset threshold intervals to achieve hierarchical warning:

[0071] 1. Normal state (S < S1): The comprehensive offset index is lower than the first threshold S1. For example, S1 = 0.15, indicating that the offset amount of the near-infrared analyzer 4 is extremely small or there is no obvious offset, the electric push rod 11 propels smoothly, the detection conditions are good, the system records normal operation data, and no prompt is triggered.

[0072] 2. First-level warning (S1 ≤ S < S2): The comprehensive offset index is between the first threshold S1 and the second threshold S2. For example, S2 = 0.35. This state indicates that there is a slight offset in the near-infrared analyzer 4, but the offset amount is still within the correctable range of the guide plate 12 and the airbag pad 13. The processor issues a mild warning signal, such as sending a prompt message to the central control system, recording the event, and entering it into the offset trend database. In this state, the device can continue to operate, but it prompts the operator to pay attention to the operating state of the device and arrange preventive maintenance when necessary.

[0073] 3. Second-level alarm (S ≥ S2): The comprehensive offset index reaches or exceeds the second threshold S2. This state indicates that the offset amount of the near-infrared analyzer 4 is relatively large, and it may have exceeded the effective correction range of the guide plate 12, or there are other serious faults in the device, such as jamming of the conveying mechanism or leakage of the airbag pad 13. This will seriously affect the detection accuracy and may even damage the device. The processor immediately issues an audible and visual alarm signal, and can also link the control system to stop the device operation or suspend the detection process, and force manual intervention for inspection and repair.

[0074] III. Offset trend analysis and predictive maintenance:

[0075] The processor also has the function of offset trend analysis. The system records the comprehensive offset index S, the current offset component C_I, and the air pressure difference component C_P calculated during each advancement process, forming a historical data sequence. By performing linear regression analysis on the S values of multiple detection cycles (for example, 10 consecutive detections), the offset development trend slope k is calculated.

[0076] If the k value continues to be positive and increases continuously, it indicates that the device has a cumulative offset trend, which is usually caused by the long-term operation wear of the conveying mechanism, such as the conveyor belt 6, or the gradual decline of the positioning accuracy. When it is predicted that the S value will reach S2 within the next N cycles, the processor issues a predictive maintenance suggestion in advance, prompting the operator to check, calibrate, or replace the conveying mechanism, and eliminating the device failure at the budding stage.

[0077] In particular, the processor can also perform correlation analysis on the current offset component C_I and the air pressure difference component C_P. If the abnormal S value is mainly contributed by C_I, the fault may originate from the electric push rod 11 itself or the jamming of the mechanical transmission part; if the abnormal S value is mainly contributed by C_P, the fault is more likely to be due to the horizontal positioning offset of the near-infrared analyzer 4. Through this fault source identification, accurate diagnostic guidance is provided for maintenance personnel, greatly shortening the fault troubleshooting time.

[0078] This solution overcomes the limitations of traditional single-parameter threshold judgment. By constructing a comprehensive offset index S, it integrates the working current of the electric push rod with the air pressure of the dual airbags for calculation, achieving quantitative and comprehensive evaluation of the near-infrared analyzer's offset status. Based on this, a three-level early warning mechanism can accurately distinguish between normal status, minor offsets that can be corrected, and severe offsets requiring shutdown for maintenance, avoiding false alarms and missed alarms. The introduction of offset trend analysis and fault source identification functions enables the system to have predictive maintenance capabilities, ensuring not only the long-term accuracy and stability of online detection but also improving the intelligent level of equipment operation and maintenance. This multi-parameter integrated calculation and analysis method provides an innovative technical path for the intelligent upgrading of online detection equipment in flour processing.

[0079] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. An online detection device for flour processing, comprising multiple flour discharge chambers (1) and a near-infrared analyzer (4) moving in the horizontal direction, characterized in that, The powder outlet chamber (1) is provided with an inclined chute (2) on the end face facing the near-infrared analyzer (4). An optical window (3) is provided on the inclined surface of the inclined chute (2). The probe of the near-infrared analyzer (4) is perpendicular to the optical window (3). An electric push rod (11) is connected to the outer wall of the near-infrared analyzer (4) away from the inclined chute (2). The extension direction of the electric push rod (11) is perpendicular to the inclined surface of the inclined chute (2). The electric push rod (11) and the near-infrared analyzer (4) can move in the distribution direction of multiple powder outlet chambers (1). Guide plates (12) are fixed on both sides of the inclined surface of the inclined chute (2) and the near-infrared analyzer (4).

2. The online detection device for flour processing according to claim 1, characterized in that, It is also provided with a guide rail (5) and a conveyor belt (6). The guide rail (5) has a movable platform (19) connected to the conveyor belt (6) that slides at the upper limit. The movable platform (19) has an installation platform (9) fixed on it. The installation platform (9) has a sliding platform (10) that slides at the upper limit in the distribution direction of the multiple powder outlet chambers (1). A locking mechanism is provided between the sliding platform (10) and the installation platform (9). The locking mechanism can lock the sliding platform (10) and the installation platform (9).

3. The online detection device for flour processing according to claim 2, characterized in that, The guide plate (12) is provided with a fixing part (121), a limiting part (122) and a guiding part (123). The limiting part (122) is perpendicular to the outer wall of the inclined chute (2). The distance between the two limiting parts (122) is adapted to the housing part corresponding to the near-infrared analyzer (4). The distance between the two guiding parts (123) gradually increases in the direction away from the limiting part (122).

4. The online detection device for flour processing according to claim 3, characterized in that, The two guide plates (12) are provided with mounting grooves on their adjacent sides. The mounting grooves cover both the limiting part (122) and the guide part (123). There is a gap between the mounting groove and the edge of the guide part (123) away from the limiting part (122). An airbag pad (13) is fixed in the mounting groove. A gasket (18) is fixed on the outer wall of the near-infrared analyzer (4) at the position corresponding to the guide plate (12).

5. The online detection device for flour processing according to claim 4, characterized in that, It also includes a current monitoring unit, a bar pressure monitoring unit, and a processor; When the electric push rod (11) pushes the near-infrared analyzer (4) toward the inclined chute (2): The current monitoring unit is used to monitor the operating current of the electric push rod (11); The air pressure monitoring unit is used to monitor the air pressure values ​​of the two airbag cushions (13); The processor determines the offset state of the near-infrared analyzer (4) after it is moved horizontally to the work station based on the monitored operating current and the air pressure values ​​of the two airbags (13).

6. An online detection device for flour processing according to any one of claims 2 to 5, characterized in that, The installation platform (9) has two slide rails (21) fixed on top. The sliding platform (10) has a slider (22) fixed at the bottom corresponding to the slide rail (21). The slider (22) slides at the upper limit of the slide rail (21). Both ends of the slide rail (21) are fixed with baffles (23) in the extension direction.

7. An online detection device for flour processing according to any one of claims 2 to 5, characterized in that, An installation rod (14) is installed between the telescopic shaft of the electric push rod (11) and the near-infrared analyzer (4). A sliding hole is provided at the bottom of the installation rod (14), and a guide rod (15) is slidably connected to the inner wall of the sliding hole. The guide rod (15) is set perpendicular to the inclined chute (2), and the bottom end of the guide rod (15) is fixed to the top of the sliding platform (10).

8. An online detection device for flour processing according to any one of claims 2 to 5, characterized in that, The locking mechanism is equipped with an electromagnetic block (24) installed at the bottom of the sliding platform (10), and a magnetic absorbing plate (25) is fixed on the top of the mounting platform (9). The magnetic absorbing plate (25) is long and extends horizontally in the distribution direction of the multiple powder outlet chambers (1).

9. An online detection method for flour processing, comprising an online detection device for flour processing according to claim 5, characterized in that, Includes the following steps: The conveyor belt (6) stops the near-infrared analyzer (4) and the probe of the near-infrared analyzer (4) corresponds to the position of the optical window (3). When it stops, the locking mechanism is released and the electric push rod (11) pushes the probe of the near-infrared analyzer (4) closer to the optical window (3). The guide plates (12) on both sides correct the deviation of the near-infrared analyzer (4) in the extension direction of the conveyor belt (6). The electric push rod (11) pushes the near-infrared analyzer (4) a certain distance and then stops. The locking mechanism locks the sliding platform (10) and the mounting platform (9). The near-infrared analyzer (4) performs detection through the optical window (3) to obtain online detection results. After the test is completed, the electric push rod (11) retracts with the near-infrared analyzer (4), and then the near-infrared analyzer (4) is transferred to the next test station by the conveyor belt (6); The near-infrared analyzer (4) is moved from the powder outlet chamber (1) at the beginning to the powder outlet chamber at the end by the conveyor belt (6), and then moved back to the beginning from the end by the conveyor belt (6).

10. The online detection method for flour processing according to claim 9, characterized in that, During the process of the electric push rod (11) pushing the near-infrared analyzer (4) close to the optical window (3), the working current of the electric push rod (11) and the air pressure values ​​of the two airbags (13) are collected. The comprehensive offset index is calculated based on the collected working current and the air pressure values ​​of the two airbags (13), and the offset state of the near-infrared analyzer (4) is determined based on the comprehensive offset index. A warning signal is issued when the comprehensive offset index reaches the first preset threshold, and an alarm signal is issued when the comprehensive offset index reaches the second preset threshold.

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