Conveying device for powder bowl loading and metering and weighing system thereof

Abstract

The invention discloses a conveying device for powder bowl filling and a metering and weighing system of the conveying device. The conveying device comprises an equipment frame, a feeding mechanism, a scattering mechanism and a controller, wherein the feeding mechanism, the scattering mechanism and the controller are installed on the equipment frame. The metering and weighing system comprises a data acquisition module, a metering optimization module and a dynamic compensation module; and the metering optimization module is used for adjusting filter parameters in real time according to the state information of the device and the change of the measurement noise by adopting a self-adaptive Kalman filtering algorithm, and carrying out optimization processing on the measurement data. Through the synergistic effect of the weighing sensor and the valve control mechanism, the weighing sensor adopts a measurement mode of combining a strain gauge type weighing sensor and a piezoresistive weighing sensor, and the self-adaptive Kalman filtering algorithm is used for optimizing measurement data, so that the material metering accuracy is ensured, and the material metering precision is improved. And the uniformity and consistency of material conveying are ensured, so that the product quality and the production efficiency are improved.

Description

Technical Field

[0001] The invention relates to the technical field of powder material processing, and in particular to a conveying device for powder filling and a metering and weighing system thereof. Background Art

[0002] Powder loading is a high-precision, high-efficiency, and environmentally friendly automation technology that is widely used in the production of powder materials that require high-temperature sintering. In the multiple processes of powder metallurgy, materials need to be transported and transferred between different equipment.

[0003] By weighing, we can ensure that the weight of materials during the conveying and transfer process is accurate, avoiding production problems caused by missing or excessive materials. Existing powder filling and conveying devices usually require manual operation, such as manual control of feeding, filling and conveying processes. This kind of manual intervention is not only inefficient, but also prone to material waste or inaccurate filling due to human errors, thus affecting the consistency of product quality.

[0004] Based on the above-mentioned defects, a conveying device for powder filling bowl and a metering and weighing system thereof are provided. Summary of the invention

[0005] The present invention aims to provide a conveying device for powder filling bowls and a metering and weighing system thereof, so as to solve the problems of low efficiency, poor precision and much manual intervention in the prior art, realize high-precision metering and automatic conveying of powder materials, improve product quality and production efficiency, and reduce manual intervention and equipment maintenance costs.

[0006] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a conveying device for powder loading, comprising an equipment frame, a feeding mechanism installed on the equipment frame, a spreading mechanism and a controller, a metering hopper is arranged between the feeding mechanism and the spreading mechanism, the feeding mechanism feeds the powder into the metering hopper, and the powder falls to the spreading mechanism after being weighed, the metering hopper is provided with a valve control mechanism for controlling the flow of materials, a load-bearing frame is installed on the equipment frame, the load-bearing frame is provided with a mounting plate and a control mechanism for adjusting the height of the mounting plate, and a metering mechanism is arranged between the mounting plate and the metering hopper.

[0007] Preferably, the valve control mechanism includes a flap and a component for controlling the rotation of the flap, a frame plate is fixedly provided at the outer end of the metering hopper, and the flap is rotatably connected to the inner side of the frame plate.

[0008] Preferably, a stop block is fixedly provided on the outer end of the metering hopper, a crank is fixedly provided on the flap, and the component for controlling the rotation of the flap includes a telescopic rod installed on the outer end of the metering hopper, a sliding frame is fixedly provided on the output end of the telescopic rod, and a rotary arm is rotatably connected between the sliding frame and the crank.

[0009] Preferably, the guide member comprises a protrusion fixed on the transverse plate, the height control mechanism is a slide cylinder installed on the load-bearing frame, and the output end of the slide cylinder is fixed to the free end of the mounting plate.

[0010] Preferably, the metering mechanism is a weighing sensor mounted on a mounting plate.

[0011] In the present application, a metering and weighing system using the above-mentioned conveying device for powder bowl is also provided, wherein the metering and weighing system is integrated in a controller, and the metering and weighing system includes a data acquisition module, a metering optimization module, and a dynamic compensation module; The data acquisition module is used to obtain the weight data of the powder material in the metering hopper in real time through the weighing sensor; it is also used to obtain the status information on the device; The metering optimization module is used to use an adaptive Kalman filter algorithm to adjust the filter parameters in real time according to the state information of the device and the change of the measurement noise, and optimize the measurement data; The dynamic compensation module is used to establish a material flow model according to the dynamic characteristic information of the powder material during the feeding and unloading process, and to predict the change trend of the powder material weight in combination with the real-time data of the weighing sensor; when the powder material approaches the target weight, the speed of the feeding motor in the feeding mechanism is controlled in advance to adjust the feeding speed.

[0012] Preferably, the feeding mechanism is further provided with an electrostatic eliminator; the metering and weighing system further comprises an electrostatic monitoring module, and an electrostatic elimination analysis and control module; The electrostatic monitoring module is used to monitor the electrostatic information of the powder material during the transportation and weighing process, measure the electrostatic potential of the powder material and the surface of the equipment in real time through the electrostatic sensor, and transmit the electrostatic information to the electrostatic elimination analysis module; The static elimination analysis and control module is used to analyze static information, obtain static potential and preset capacitance, and calculate the static charge accordingly; set the time requirement for static elimination, calculate the required elimination current; and control the static eliminator to release opposite charges according to the elimination current.

[0013] Preferably, the weight data of the powder material in the metering hopper is obtained in real time through a weighing sensor, which is specifically: The weighing sensor acquires weight data by combining a strain gauge weighing sensor with a piezoresistive weighing sensor; The working principle of strain gauge weighing sensor and piezoresistive weighing sensor is used to cross-validate the measurement results; during the test, the error tolerance range is set. , respectively obtain the measured value W1 of the strain gauge weighing sensor and the measured value W2 of the piezoresistive weighing sensor. If , indicating that the measurement result is reliable, take the average of the two As the final weight data; on the contrary, if , it triggers the weight history change analysis, then the weight sensor alarm mechanism is triggered.

[0014] Preferably, a material flow model is established based on the dynamic characteristic information of the powder material during feeding and unloading, and the specific analysis steps are as follows: Step 1: Obtain dynamic characteristic information of powder materials during feeding and discharging, including density of powder materials, angle of repose of accumulation, shape and size of feeding port and discharging port, type of feeding mechanism and corresponding working parameters, feeding speed, and discharging speed; working parameters include speed, pitch, and filling factor of screw feeder; Step 2: According to the type of feeding mechanism, determine that the flow state of the powder during feeding and discharging is a forced flow state; establish a forced flow model to obtain the feeding speed of the powder material, the rotation speed of the spiral, the pitch of the spiral and the filling coefficient of the spiral. The filling coefficient of the spiral is determined by measuring the ratio of the volume of the feed within a set time to the volume of the spiral; Step 3: Correct the feeding speed through the basic physical model: Obtain the average particle size of the material particles in the powder material, the density of the powder material, and the angle of repose of the stacking; The average particle size of the material particles, the density of the powder material, and the angle of repose of the stacking are weighted to obtain the particle mutual influence value; based on the physical properties of the powder material, the structural parameters of the screw feeder, and the relevant theories of fluid mechanics, a theoretical model is established to calculate the theoretical feeding speed, and the difference between the theoretical feeding speed and the actual feeding speed is calculated to obtain the theoretical speed difference; Then obtain the viscosity coefficient of the powder material; weight the particle mutual influence value, the theoretical speed difference and the viscosity coefficient to obtain the speed correction factor of the feeding speed; use the speed correction factor to correct the feeding speed to obtain the corrected feeding speed; Establish a mathematical model of material flow: Calculate the cross-sectional area of ​​material flow based on the shape and size of the feed port, obtain the density of the powder material, and then calculate the mass flow rate of the powder material; Obtain the conveying data of the powder feeding bowl under different working conditions, including different feeding speeds, different batches of powder materials, and different screw feeder working parameters; The conveying data of the experimental working conditions are substituted into the established material flow mathematical model to calculate the predicted value of the material mass flow rate; the difference between the predicted value and the actual measured value is calculated to obtain the relative error; if the relative error is not within the preset allowable error range, the model is optimized until the predicted value of the model is within the preset allowable error range.

[0015] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are: 1. The present invention ensures the accuracy of material measurement and the uniformity and consistency of material transportation through the synergistic effect of the weighing sensor and the valve control mechanism. The weighing sensor adopts a measurement method that combines a strain gauge weighing sensor with a piezoresistive weighing sensor, and an adaptive Kalman filter algorithm optimizes the measurement data, thereby improving product quality and production efficiency.

[0016] 2. The present invention realizes highly automated operation with the help of components such as controllers and slide cylinders, and can automatically complete processes such as feeding, metering, and unloading, reducing manual intervention and labor costs; at the same time, the feeding speed and other parameters can be adjusted through the dynamic compensation module according to different material and process requirements, thereby improving the flexibility and adaptability of the system.

[0017] 3. The present invention effectively monitors and eliminates static electricity in the powder material during transportation and weighing by setting up the static electricity monitoring module and the static electricity elimination analysis and control module, reduces the influence of static electricity on the measurement accuracy, and further ensures the measurement accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A three-dimensional schematic diagram of a conveying device provided according to an embodiment of the present invention is shown; Figure 2 A schematic diagram of the assembly structure of a load-bearing frame and a metering hopper according to an embodiment of the present invention is shown; Figure 3 A schematic diagram of the structure of a metering hopper provided according to an embodiment of the present invention is shown; Figure 4 A principle block diagram of a measuring and weighing system provided according to an embodiment of the present invention is shown.

[0019] Legend: 1. Equipment frame; 2. Feeding mechanism; 3. Load-bearing frame; 4. Slide cylinder; 5. Mounting plate; 6. Weighing sensor; 7. Measuring hopper; 8. Telescopic rod; 9. Sliding frame; 10. Swing arm; 11. Crank; 12. Frame plate; 13. Flip plate; 14. Spreading mechanism. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] See also Figure 1-Figure 4The present invention provides a technical solution: a conveying device for powder loading, comprising an equipment frame 1, a feeding mechanism 2 installed on the equipment frame 1, a spreading mechanism 14 and a controller, a metering hopper 7 is arranged between the feeding mechanism 2 and the spreading mechanism 14, the feeding mechanism 2 feeds the powder into the metering hopper 7, and the powder falls to the spreading mechanism 14 after being weighed, the metering hopper 7 is provided with a valve control mechanism for controlling the flow of materials, a load-bearing frame 3 is installed on the equipment frame 1, a mounting plate 5 and a control mechanism for adjusting the height of the mounting plate 5 are arranged on the load-bearing frame 3, and a metering mechanism is arranged between the mounting plate 5 and the metering hopper 7.

[0022] The equipment frame 1 is the basic structure of the whole device, supporting the feeding mechanism 2, the load-bearing frame 3 and the material spreading mechanism 14, realizing the integration of the structure. The feeding mechanism 2 is the existing technology, which adopts a spiral feeder and is responsible for feeding the powder material into the weighing process. Its design needs to ensure that the material can be fed evenly and stably. The load-bearing frame 3 is a structure that supports the metering mechanism and the metering hopper 7. Its design needs to ensure sufficient rigidity and stability to ensure the accuracy of weighing.

[0023] The weighing sensor 6 is a prior art, which uses a strain gauge weighing sensor and a piezoresistive weighing sensor to work together to measure the weight of the material in the metering hopper 7. The metering hopper 7 is a component that directly contacts the material and is used to hold the powder material to be weighed. The spreading mechanism 14 is responsible for transferring the weighed material to the next process, such as bowling or other processing processes.

[0024] See also Figure 1-Figure 3 The valve control mechanism includes a flap 13 and a component for controlling the rotation of the flap 13. A frame plate 12 is fixedly provided at the outer end of the metering hopper 7, and the flap 13 is rotatably connected to the inner side of the frame plate 12; A crank 11 is fixedly provided on the flap 13 , and a component for controlling the rotation of the flap 13 includes a telescopic rod 8 installed at the outer end of the metering hopper 7 , a sliding frame 9 is fixedly provided at the output end of the telescopic rod 8 , and a rotary arm 10 is rotatably connected between the sliding frame 9 and the crank 11 .

[0025] The telescopic rod 8 is a mechanical device with adjustable length, usually composed of multiple sleeves, and the length change is achieved through hydraulic or pneumatic expansion and contraction. When the telescopic rod 8 is extended or contracted, the sliding frame 9 moves accordingly, and the crank 11 is driven to rotate through the swing arm 10, thereby causing the flap 13 to rotate around its rotation connection point inside the frame plate 12. Accurate control of the material flow state is achieved.

[0026] The height control mechanism is a slide cylinder 4 mounted on the load-bearing frame 3, and the output end of the slide cylinder 4 is fixed to the free end of the mounting plate 5. The slide cylinder 4 that controls the movement of the mounting plate 5 is used to adjust the position of the mounting plate 5 to adapt to materials of different weights or volumes, and is also used to move the metering hopper 7 to the next working position after weighing is completed.

[0027] The measuring mechanism is a weighing sensor 6 mounted on the mounting plate 5 .

[0028] The working principle of the conveying device for powder loading bowl proposed by the present invention is as follows: The material is fed into the metering hopper 7 through the feeding mechanism 2. After the weighing sensor 6 measures the material in the metering hopper 7 to meet the standard, the controller first controls the feeding mechanism 2 to stop the feeding action, and then drives the sliding frame 9 to start moving upward by controlling the telescopic rod 8, so that the flap 13 rotates to open the bottom opening of the metering hopper 7 and discharges the weighed material outward. After the unloading is completed, the sliding frame 9 moves downward under the action of the telescopic rod 8, the bottom opening of the metering hopper 7 is closed, and the weighing sensor 6 re-measures the weight of the material in the metering hopper 7. The controller is an industrial PC controller installed on the equipment frame 1. The input end of the controller is electrically connected to the input end of the weighing sensor 6, and its output end is electrically connected to the input end of the feeding mechanism 2 and the spreading mechanism 14.

[0029] In the present application, a metering and weighing system using the above-mentioned conveying device for powder bowl is also provided, the metering and weighing system is integrated in the controller, and the metering and weighing system includes a data acquisition module, a metering optimization module, and a dynamic compensation module; The data acquisition module is used to obtain the weight data of the powder material in the metering hopper 7 in real time through the weighing sensor 6; it is also used to obtain the status information on the device; It should be noted that the status information includes equipment operation parameters, material status parameters and environmental parameters. The equipment operation parameters include feeding mechanism 2 parameters, valve control mechanism parameters and slide cylinder 4 parameters. The feeding mechanism 2 parameters include the speed, current and voltage of the feeding motor, which reflect the operation status and feeding capacity of the feeding mechanism 2. The valve control mechanism parameters include the telescopic state and position information of the telescopic rod 8, the opening and closing angle of the flap 13, etc. The position of the telescopic rod 8 determines the opening and closing of the flap 13, which affects the material flow. The slide cylinder 4 parameters include the stroke position, movement speed and air pressure of the slide cylinder 4. The stroke position reflects the height of the mounting plate 5 and the metering hopper 7. The speed affects the material loading and unloading efficiency. The air pressure reflects the working stability of the slide cylinder 4. Material state parameters include the real-time flow rate of materials during feeding and unloading, and changes in the characteristics of powder materials such as humidity and temperature; environmental parameters include the temperature, humidity, and air pressure of the working environment; specific selection parameters are set according to actual conditions; The metering optimization module is used to use the adaptive Kalman filter algorithm to adjust the filter parameters in real time according to the state information of the device and the change of measurement noise, and optimize the measurement data, specifically: The state vector of the acquisition device is recorded as , the state transfer equation is ,in, represents the state transfer matrix, k represents the current time step, k-1 represents the previous time step, is the control input matrix, represents the control input vector, represents process noise, which has a mean of zero and a covariance of Gaussian distribution of The measurement equation is ,in, is the measurement vector, i.e., the weight data obtained by the weighing sensor 6, represents the measurement matrix, represents the measurement noise, which has a mean of zero and a covariance of Gaussian distribution of The adaptive Kalman filter algorithm is based on the traditional Kalman filter and dynamically adjusts the Subject to zero mean and covariance The Gaussian distribution of is as follows: Status prediction: ,in is the current moment predicted state based on the previous moment state estimate, represents the covariance matrix of the predicted state, Representation Matrix The transposed matrix of The new matrix is ​​obtained by swapping the rows and columns of ; Measuring predictions: , ;in, is the Kalman gain, represents the updated state estimate, represents the updated state covariance matrix, Representation Matrix The transposed matrix of Adaptive adjustment: by calculating the new information sequence Statistical characteristics, dynamic adjustment Subject to zero mean and covariance Gaussian distribution to improve filtering effect; It should be noted that k-1|k-1 represents the estimation of the state at time k-1, such as is the covariance matrix of the predicted state, which is the prediction of the state covariance at time k based on the information at time k-1. k|k-1 represents the prediction of time k based on the information at time k-1. The meanings of the remaining letters in the above are also set in the same way and will not be repeated here. The dynamic compensation module is used to establish a material flow model based on the dynamic characteristics of the powder material during the feeding and unloading process, and to predict the weight change trend of the powder material in combination with the real-time data of the weighing sensor 6; when the powder material is close to the target weight, the speed of the feeding motor in the feeding mechanism is controlled in advance to adjust the feeding speed; the specific steps are: Identify the target conveying weight of powder materials according to the target task , obtain the current measured weight through weighing sensor 6 , then the remaining weight to be added is ; Predict the time required to reach target weight based on material flow model ; when Less than the set threshold When the feeding motor speed in the feeding mechanism 2 is adjusted, the feeding motor speed n has a certain functional relationship with the feeding speed v. , adjust the feeding speed v by controlling the feeding motor speed n to avoid overfeeding.

[0030] The feeding mechanism 2 is also provided with an electrostatic eliminator; the weighing system also includes an electrostatic monitoring module, an electrostatic elimination analysis and control module; The static electricity monitoring module is used to monitor the static electricity information of powder materials during the transportation and weighing process. It measures the static electricity potential of the powder materials and the surface of the equipment in real time through the static electricity sensor, and transmits the static electricity information to the static electricity elimination analysis module; The static elimination analysis and control module is used to analyze static information, specifically: Obtaining electrostatic potential The electrostatic charge is calculated based on the preset capacitance C. ; Set the time requirement for static elimination , calculate the required elimination current; according to the elimination current The static eliminator is controlled to release opposite charges to neutralize the static electricity on the surface of powder materials and equipment, so as to reduce the static interference in the metering process.

[0031] In the present application, the weight data of the powder material in the metering hopper 7 is obtained in real time by the weighing sensor 6, which is specifically: The weighing sensor 6 uses a combination of a strain gauge weighing sensor and a piezoresistive weighing sensor to obtain weight data; The working principle of strain gauge weighing sensor and piezoresistive weighing sensor is used to cross-validate the measurement results; during the test, the error tolerance range is set. , respectively obtain the measured value W1 of the strain gauge weighing sensor and the measured value W2 of the piezoresistive weighing sensor. If , indicating that the measurement result is reliable, take the average of the two As the final weight data; otherwise, if , then the weight history change analysis is triggered, then the weight sensor alarm mechanism is triggered; the weight sensor alarm mechanism is used to trigger the operator to check whether the sensor is working properly; It should be noted that strain gauge sensors have high accuracy when measuring stable weight, and piezoresistive sensors respond quickly to weight changes. The combination of the two can improve measurement reliability under different working conditions, thereby obtaining more accurate weight data.

[0032] In this application, a material flow model is established based on the dynamic characteristic information of powder materials during feeding and unloading, and the specific analysis steps are as follows: Step 1: obtain dynamic characteristic information of the powder material during feeding and unloading, including the density of the powder material, the angle of repose of the stacking, the shape and size of the feeding port and the unloading port, the type of feeding mechanism and the corresponding working parameters, the feeding speed, and the unloading speed; the working parameters include the speed, pitch, and filling factor of the screw feeder; it should be noted that the feeding mechanism 2 proposed in this application is a screw feeder; Step 2: According to the type of feeding mechanism 2, the flow state of the powder during feeding and discharging is judged to be a forced flow state. According to the type of feeding mechanism 2 being a screw feeder, the flow state is further judged to be a forced flow state; a forced flow model is established to obtain the feeding speed of the powder material. , the speed of the spiral n, the pitch of the spiral p and the filling factor of the spiral , where the calculation formula for feeding speed is , the filling factor of the spiral The determination method is to measure the ratio of the volume of the feed to the volume of the screw within the set time; Step 3: Correct the feeding speed through the basic physical model: Obtain the average particle size of the material particles in the powder material, the density of the powder material, and the angle of repose of the stacking; The average particle size of the material particles, the density of the powder material, and the angle of repose of the stacking are weighted to obtain the particle mutual influence value; based on the physical properties of the powder material, the structural parameters of the screw feeder, and the relevant theories of fluid mechanics, a theoretical model is established to calculate the theoretical feeding speed, and the difference between the theoretical feeding speed and the actual feeding speed is calculated to obtain the theoretical speed difference; Then obtain the viscosity coefficient of the powder material, which can be obtained by measuring the powder material with a viscometer; weight the particle mutual influence value, the theoretical speed difference and the viscosity coefficient to obtain the speed correction factor of the feeding speed; use the speed correction factor to correct the feeding speed to obtain the corrected feeding speed ; Establish a mathematical model of material flow: Calculate the cross-sectional area A of the material flow based on the shape and size of the feed port to obtain the density of the powder material , and then calculate the mass flow rate of powder materials , the formula indicates ; Obtain the conveying data of the powder feeding bowl under different working conditions, including different feeding speeds, different batches of powder materials, and different screw feeder working parameters; The conveying data of the experimental working conditions are substituted into the established material flow mathematical model to calculate the predicted value of the material mass flow rate; the predicted value is calculated by difference with the actual measured value to obtain the relative error; if the relative error is not within the preset allowable error range, the model is optimized until the predicted value of the model is within the preset allowable error range; it should be noted that the material flow model is established in a conventional manner based on existing mature technologies, and for this reason, no further detailed description is given in this application.

[0033] The above description of the embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A conveying device for powder filling, comprising an equipment frame (1), a feeding mechanism (2) mounted on the equipment frame (1), a spreading mechanism (14) and a controller, characterized in that: A metering hopper (7) is provided between the feeding mechanism (2) and the spreading mechanism (14); the feeding mechanism (2) feeds powder into the metering hopper (7), and the powder falls to the spreading mechanism (14) after being weighed; a valve control mechanism for controlling the flow of materials is provided on the metering hopper (7); a load-bearing frame (3) is installed on the equipment frame (1); a mounting plate (5) and a control mechanism for adjusting the height of the mounting plate (5) are provided on the load-bearing frame (3); and a metering mechanism is provided between the mounting plate (5) and the metering hopper (7).

2. A conveying device for powder filling bowl according to claim 1, characterized in that: The valve control mechanism comprises a flap (13) and a component for controlling the rotation of the flap (13); a frame plate (12) is fixedly provided at the outer end of the metering hopper (7); and the flap (13) is rotatably connected to the inner side of the frame plate (12).

3. A conveying device for powder filling bowl according to claim 2, characterized in that: A crank (11) is fixedly provided on the flap (13), and a component for controlling the rotation of the flap (13) comprises a telescopic rod (8) mounted on the outer end of the metering hopper (7), a sliding frame (9) is fixedly provided on the output end of the telescopic rod (8), and a rotary arm (10) is rotatably connected between the sliding frame (9) and the crank (11).

4. A conveying device for powder filling bowl according to claim 1, characterized in that: The height control mechanism is a slide cylinder (4) mounted on the load-bearing frame (3), and the output end of the slide cylinder (4) is fixed to the free end of the mounting plate (5).

5. The conveying device for powder filling bowl according to claim 1, characterized in that: The metering mechanism is a weighing sensor (6) mounted on a mounting plate (5).

6. A weighing system for a powder-filling conveying device according to any one of claims 1 to 5, wherein the weighing system is integrated into a controller, characterized in that: The measuring and weighing system includes a data acquisition module, a measuring optimization module, and a dynamic compensation module; The data acquisition module is used to obtain weight data of the powder material in the metering hopper (7) in real time through a weighing sensor (6); and is also used to obtain status information on the device; The metering optimization module is used to use an adaptive Kalman filter algorithm to adjust the filter parameters in real time according to the state information of the device and the change of the measurement noise, and optimize the measurement data; The dynamic compensation module is used to establish a material flow model based on the dynamic characteristic information of the powder material during the feeding and unloading process, and to predict the weight change trend of the powder material in combination with the real-time data of the weighing sensor (6); when the powder material approaches the target weight, the speed of the feeding motor in the feeding mechanism (2) is controlled in advance to adjust the feeding speed.

7. The weighing system for a powder-filling conveying device according to claim 6, characterized in that: The feeding mechanism (2) is also provided with an electrostatic eliminator; the weighing system further comprises an electrostatic monitoring module and an electrostatic elimination analysis and control module; The electrostatic monitoring module is used to monitor the electrostatic information of the powder material during the transportation and weighing process, measure the electrostatic potential of the powder material and the surface of the equipment in real time through the electrostatic sensor, and transmit the electrostatic information to the electrostatic elimination analysis module; The static elimination analysis and control module is used to analyze static information, obtain static potential and preset capacitance, and calculate the static charge amount accordingly; Set the time requirement for static elimination and calculate the required elimination current; The static eliminator is controlled to release opposite charges according to the elimination current.

8. The weighing system for a powder-filling conveying device according to claim 6, characterized in that: The weight data of the powder material in the metering hopper (7) is obtained in real time through the weighing sensor (6), which is specifically: The weighing sensor (6) acquires weight data by combining a strain gauge weighing sensor with a piezoresistive weighing sensor; The working principle of strain gauge load cell and piezoresistive load cell is used to cross-validate the measurement results; During the test, set the error tolerance range , respectively obtain the measured value W1 of the strain gauge weighing sensor and the measured value W2 of the piezoresistive weighing sensor. If , indicating that the measurement result is reliable, and the average of the two is taken as the final weight data; on the contrary, if , the weight history change analysis is triggered, and the weight sensor alarm mechanism is triggered.

9. The weighing system for a powder-filling conveying device according to claim 6, characterized in that: According to the dynamic characteristics of powder materials during feeding and unloading, a material flow model is established. The specific analysis steps are as follows: Step 1, obtaining dynamic characteristic information of the powder material during the feeding and discharging process, including the density of the powder material, the angle of repose of the stacking, the shape and size of the feeding port and the discharging port, the type of the feeding mechanism (2) and the corresponding working parameters, the feeding speed, and the discharging speed; the working parameters include the speed, pitch, and filling factor of the screw feeder; Step 2: judging that the flow state during the powder feeding and unloading process is a forced flow state according to the type of the feeding mechanism (2); establishing a forced flow model to obtain the feeding speed of the powder material, the rotation speed of the screw, the pitch of the screw and the filling coefficient of the screw, wherein the filling coefficient of the screw is determined by measuring the ratio of the volume of the feed to the volume of the screw within a set time; Step 3: Correct the feeding speed through the basic physical model: Obtain the average particle size of the material particles in the powder material, the density of the powder material, and the angle of repose of the stacking; The average particle size of the material particles, the density of the powder material, and the angle of repose of the stacking are weighted to obtain the particle mutual influence value; based on the physical properties of the powder material, the structural parameters of the screw feeder, and the relevant theories of fluid mechanics, a theoretical model is established to calculate the theoretical feeding speed, and the difference between the theoretical feeding speed and the actual feeding speed is calculated to obtain the theoretical speed difference; Then obtain the viscosity coefficient of the powder material; The speed correction factor of the feeding speed is obtained by weighted calculation of the particle mutual influence value, the theoretical speed difference value and the viscosity coefficient; the feeding speed is corrected by using the speed correction factor to obtain a corrected feeding speed; Establish a mathematical model of material flow: Calculate the cross-sectional area of ​​material flow based on the shape and size of the feed port, obtain the density of the powder material, and then calculate the mass flow rate of the powder material; Obtain the conveying data of the powder feeding bowl under different working conditions, including different feeding speeds, different batches of powder materials, and different screw feeder working parameters; The conveying data of the experimental working conditions are substituted into the established material flow mathematical model to calculate the predicted value of the material mass flow rate; the difference between the predicted value and the actual measured value is calculated to obtain the relative error; if the relative error is not within the preset allowable error range, the model is optimized until the predicted value of the model is within the preset allowable error range.

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