Automatic verification device and verification method for weighing coal feeder device

Abstract

The invention discloses an automatic verification device and method for a weighing coal feeder device. The automatic verification device comprises a weight calibration system, a weight verification control system, a sensor calibration system and a weighing coal feeder. According to the invention, the weight of the standard weight most suitable for the current calibration requirement is dynamically calculated and selected through the weight calibration system based on historical data, environmental parameters and the like of the weighing sensor, so that the calibration precision and flexibility are greatly improved, and variable working condition requirements can be met; according to the invention, an automatic weight verification control system is designed, horizontal displacement, lifting adjustment and state switching of the weight are realized, and the calibration process is fully automatic; the output data of the sensor are collected in real time through the sensor calibration system, dynamic correction is carried out in combination with multiple times of weighing error calculation and historical data, drift and error trends of the weighing sensor are analyzed in real time in combination with parameters such as temperature, humidity and vibration, and error correction values are generated, so that the accuracy of weighing data is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field related to weighing coal feeders, and in particular to an automatic calibration device and a calibration method for a weighing coal feeder. Background Art

[0002] Weighing coal feeders are a common type of equipment in the coal transportation process. Their main function is to accurately weigh coal dynamically and realize automatic distribution. However, the calibration of existing weighing coal feeders mostly relies on manual intervention, and it is usually necessary to manually place standard weights for regular calibration. This calibration method is not only time-consuming and labor-intensive, but also requires picking up weights after the calibration is completed. In addition, the calibration process is easily affected by factors such as human operating errors and environmental changes, resulting in the inability to continuously guarantee the accuracy and stability of the weighing sensor. Especially in industrial scenarios such as coal mines, complex environmental conditions such as temperature, humidity, vibration, dust, etc. may affect the measurement results of the weighing sensor. In order to ensure the long-term stability of the weighing system, accurate calibration must be performed regularly to avoid the accumulation of measurement errors and affect the overall performance of the equipment.

[0003] In the prior art, although some automated calibration systems can simplify the verification process, most of them can only be calibrated based on the weight of fixed weights, and the mass of the weights cannot be adjusted dynamically. In addition, they fail to fully combine historical data, environmental parameters, and sensor error change trends. This leads to insufficient accuracy and applicability of calibration, making it difficult to cope with complex working conditions in actual operation. In addition, some systems cannot achieve real-time error correction and parameter adjustment during the calibration process, and it is easy for the equipment to still have large errors after calibration, affecting production efficiency and system reliability. Summary of the invention

[0004] The purpose of this section is to summarize some aspects of embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and the invention title of this application to avoid blurring the purpose of this section, the specification abstract and the invention title, and such simplifications or omissions cannot be used to limit the scope of the present invention.

[0005] Therefore, in order to solve the above technical problems, the present invention provides the following technical solutions: an automatic calibration device for a weighing coal feeder device, comprising a weight calibration system, a weight calibration control system, a sensor calibration system and a weighing coal feeder;

[0006] The weight calibration system is connected to the weighing coal feeder data, the weighing coal feeder includes a coal conveyor and a weighing sensor arranged on the coal conveyor, and the weight verification control system is arranged above the coal conveyor; the weight calibration system extracts historical data from the weighing sensor of the weighing coal feeder, dynamically predicts the accuracy change of the weighing sensor according to the error data of the weighing sensor and in combination with environmental parameters, calculates the weight of the standard weight closest to the current calibration requirement, and performs accuracy verification on the weighing sensor through the weight verification control system; the sensor calibration system is arranged in the weighing sensor, and the weight verification control system performs error calibration on the weighing sensor according to the accuracy verification result;

[0007] The weight calibration control system includes a weight horizontal displacement mechanism, a weight lifting mechanism, a weight installation mechanism, and a weight state switching mechanism; wherein the weight horizontal displacement mechanism includes a horizontal slide rail, the horizontal slide rail is equipped with a horizontal screw rod, the horizontal screw rod is threadedly connected to a translation slide seat, and the end of the horizontal screw rod is connected to a motor; the weight lifting mechanism includes a lifting slide rail connected to the translation slide seat, a lifting screw rod is arranged in the lifting slide rail, and the end of the lifting screw rod is connected to a transmission gear, and a descending rack group and an ascending rack group are respectively arranged on the left and right inner walls of the weighing coal feeder, and the two rack groups are staggered front and back to alternately mesh with the two sides of the transmission gear to control the transmission gear to rotate alternately in forward and reverse directions; the lifting screw rod is mechanically connected to the lifting slide seat, and the lifting slide seat is connected to the weight installation mechanism;

[0008] The weight installation mechanism comprises a weight bracket connected to the lifting slide, the weight bracket is rotatably connected to a weight shaft, the weight shaft is connected to a weight installation roller through a coupling that is easy to disassemble, and a standard weight that is easy to disassemble is arranged on the weight installation roller, and the standard weight is arranged above the coal conveyor of the weighing coal feeder; the weight bracket is provided with a weight rotation hole used in conjunction with the weight shaft, and a clamping groove is provided on both sides of the weight bracket in the middle of the weight rotation hole;

[0009] The weight state switching mechanism includes clamping buckles respectively arranged in two clamping grooves, the clamping buckles are connected to a translation control component, and the translation control component is connected to the weight lifting mechanism, so that during the lifting process of the weight lifting mechanism, the two groups of clamping buckles are controlled by the translation control component to approach or move away from each other, thereby realizing the tightening and loosening function of the weight rotating shaft.

[0010] As a preferred solution of the automated calibration device for the weighing coal feeder device described in the present invention, the weight calibration system includes a historical data acquisition module and a weight parameter calibration module. The historical data acquisition module is used to collect relevant data for calibration of the weighing sensor on the weighing coal feeder, and the weight parameter calibration module is used to calculate the weight of the standard weight according to the current error of the weighing sensor for fine calibration.

[0011] As a preferred solution of the automatic calibration device of the weighing coal feeder device described in the present invention, the relevant data for weighing sensor calibration include temperature data T(t), humidity data H(t), historical error data ε(t), environmental parameter data E(t), and drift parameter data δ(t).

[0012] As a preferred solution of the automatic calibration device of the weighing coal feeder device of the present invention, the weight parameter calibration module calculates the standard weight W required for the current calibration. cal The weight is calculated as follows:

[0013] Where, ΔW error is the error weight of the weighing sensor, and its calculation formula is as follows: ΔW error =ε pred (t)·W max , in this formula, W max The maximum weighing capacity of the weighing coal feeder;

[0014] ε pred (t) is the error range of the weighing sensor, and its calculation formula is as follows:

[0015]

[0016] In this formula, historical error data ε(t): the measurement error of the weighing sensor obtained from historical records; temperature data T(t): the temperature change in the working environment of the weighing sensor; humidity data H(t): the humidity change in the working environment of the weighing sensor; environmental parameter data E(t): other factors that affect the measurement accuracy such as air density and vibration; drift parameter data δ(t): zero drift and linear drift of the weighing sensor after long-term work;

[0017] α, β1, β2, and γ are all coefficients of the multivariate linear regression model. The coefficient data is fitted according to the historical data. The multivariate linear regression model is constructed through the above historical error data, temperature data, humidity data, and environment; Represents the future rate of change of the load cell error predicted by the multivariate linear regression model.

[0018] As a preferred solution of the automatic calibration device of the weighing coal feeder device described in the present invention, there are multiple groups of standard weights (2034), a coupling block is arranged on the inner ring of each group of standard weights (2034), a coupling slot (2036) used in conjunction with the coupling block is opened on the weight installation roller (2033), and a plurality of positioning holes are opened at equal intervals on the weight installation roller (2033), and a positioning bolt is threadedly connected to the standard weight (2034), and the positioning bolt is threadedly installed in the corresponding positioning hole, so that the calibration device can remove or replace the standard weight (2034) according to the weighing requirements, and quickly adjust the overall weight of the standard weight (2034) to adapt to different weighing conditions.

[0019] As a preferred solution of the automatic calibration device of the weighing coal feeder device described in the present invention, two sets of clamping buckles are slidably connected to the weight bracket left and right, a guide pin is arranged on the clamping buckle, a guide slide is sleeved on the guide pin, a guide slide is provided on the guide slide which is inclined downward, and the guide pin is slidably connected to the guide slide.

[0020] As an optimal solution of the automatic calibration device of the weighing coal feeder device described in the present invention, wherein: a group of guide slide grooves are respectively opened on both sides of the guide slide, and the two groups of guide slide grooves are arranged in an "eight" shape structure; the top of the guide slide is connected with a connecting frame, and the end of the connecting frame away from the guide slide is connected to the lifting slide rail for up and down sliding, so that when the weight bracket is raised and lowered, the position of the connecting frame remains unchanged after it slides down to a certain height, and the guide pin shaft slides up and down in the guide slide groove, thereby controlling the two groups of clamping buckles to approach or move away from each other, thereby realizing the tightening and loosening function of the weight shaft.

[0021] As a preferred solution of the automatic calibration device of the weighing coal feeder device described in the present invention, the sensor calibration system includes a real-time data acquisition module, an error calculation module and a parameter update module. The real-time data acquisition module is used to collect the output signal of the weighing sensor such as voltage or digital signal in real time, and record it compared with the actual weight of the standard weight; the error calculation module is used to calculate the zero drift and linear drift of the weighing sensor and generate an error correction value; the parameter update module uses the built-in program of the weighing sensor to update the correction parameters of the weighing sensor in real time according to the correction value calculated from the error calculation module.

[0022] As a preferred solution of the automatic calibration device of the weighing coal feeder device of the present invention, the steps of calculating the error correction value of the weighing sensor by the error calculation module are as follows:

[0023] The first weighing is performed, and the initial measurement value W1 of the standard weight is recorded by the weighing sensor. s , the initial error is calculated by the following formula:

[0024] Perform the second weighing, record the secondary measurement value W2 of the standard weight through the weighing sensor, and then calculate the secondary error through the following formula:

[0025] Cross validation: If |ε1-ε2|≤ε threshold , the calibration is considered successful, otherwise the system triggers the adjustment mechanism, refits the correction model through historical data, and calculates the adjusted standard weight Repeat the calibration process, the specific calculation formula is: Where, λ: adjustment coefficient, the range is positive, used to smooth the calibration error;

[0026] Combining the two weight measurement results, a correction value ΔW is generated. The calculation formula is as follows:

[0027] The present invention also provides a calibration method for the automatic calibration device of the weighing coal feeder device described above, characterized in that the specific steps are as follows:

[0028] Step 1: When calibration is required, first collect the calibration data of the weighing sensor on the weighing coal feeder through the historical data acquisition module, and calculate the weight of the standard weight according to the current error of the weighing sensor through the weight parameter calibration module to optimize the accuracy and efficiency of the calibration, rather than calibrating with a single fixed weight;

[0029] Step 2: Install the standard weight of the corresponding standard weight on the weight installation roller and set the weighing sensor to zero; start the motor so that the motor drives the horizontal screw to rotate, and the horizontal screw is connected to the mechanical transmission of the translation slide, so that the translation slide drives the lifting slide to move horizontally along the direction of the coal conveyor; when the translation slide moves to the weight measuring area of ​​the coal conveyor, the transmission gear at the top of the lifting screw contacts the descending rack group on one side of the weighing coal feeder, so that the transmission gear rotates forward, and the transmission gear drives the lifting screw to rotate synchronously, so that the lifting slide is connected to the mechanical transmission of the lifting screw, and drives the standard weight to decrease in height through the weight bracket. At the same time, the connecting frame fixes the guide slide in an unchanged position, and the guide pin shaft slides downward in the guide slide groove, so that it can drive the clamping buckles to move away from each other, thereby allowing the clamping buckles to release the clamping function of the weight rotating shaft;

[0030] At the same time, after the standard weight is lowered to a suitable height, it makes precise contact with the surface of the coal conveyor of the weighing coal feeder, so that the standard weight rolls in the weighing area of ​​the coal conveyor, and the weight of the standard weight is weighed by the weighing sensor, and the data of this time is recorded; during the rolling process of the standard weight in the weighing area, the transmission gear is separated from the descending rack group and the meshing is released;

[0031] When the standard weight is rolled from the weighing area, the weighing sensor monitors the output of the weighing sensor in real time and collects the relevant data of the first calibration through the built-in sensor calibration system; at the same time, the transmission gear contacts the rising rack group on the other side of the weighing coal feeder, causing the transmission gear to rotate in the opposite direction, and the transmission gear drives the lifting screw to rotate in the opposite direction synchronously, so that the lifting slide is connected with the lifting screw through the mechanical transmission, and drives the height of the standard weight to rise through the weight bracket. At the same time, the connecting frame fixes the position of the guide slide unchanged, and the guide pin shaft slides upward in the guide slide slot, so that it can drive the clamping buckle to approach each other until the weight shaft is clamped by the clamping buckle; then the standard weight is driven to move to the tail end of the coal conveyor according to the above principle;

[0032] Step 3: According to the above steps and principles, the standard weight is controlled to move from the tail end of the coal conveyor to its front end to perform a second calibration on the weighing sensor. The weighing sensor uses the built-in sensor calibration system to monitor the output of the weighing sensor in real time and collect relevant data of the second calibration;

[0033] Step 4: Calculate the difference between the current weighing value and the standard weight through the built-in error calculation algorithm to generate a correction value; use the built-in program to directly update the correction parameters inside the weighing sensor; store the updated parameters in the built-in EEPROM or external storage device, and finally output the corrected weighing data.

[0034] Beneficial effects of the present invention:

[0035] 1. The present invention uses a weight calibration system to dynamically calculate and select the standard weight that best suits the current calibration requirements based on the historical data of the weighing sensor, environmental parameters, etc., rather than a single fixed weight. This method greatly improves the accuracy and flexibility of calibration and can adapt to changing working conditions.

[0036] 2. The present invention designs an automated weight calibration control system, which realizes the horizontal displacement, lifting adjustment and state switching of the weight, making the calibration process fully automated, reducing manual intervention, and improving work efficiency and safety.

[0037] 3. The present invention adopts a combination of a weight installation roller and a coupling block, which makes the replacement of standard weights quick and easy, greatly reduces the difficulty of operation and improves work efficiency; through the design of positioning holes and positioning bolts, the stability of the weights during use is ensured, and the weighing error caused by loose weights is reduced; the design of multiple sets of standard weights allows users to flexibly adjust the weight of the weights according to actual needs, thereby meeting different measurement requirements.

[0038] 4. The present invention collects sensor output data in real time through the sensor calibration system, and performs dynamic corrections based on multiple weighing error calculations and historical data. The present invention uses a multivariate linear regression model to analyze the drift and error trend of the weighing sensor in real time based on parameters such as temperature, humidity, and vibration, and generates an error correction value to ensure the accuracy of the weighing data.

[0039] 5. The invention designs a cross-validation mechanism for multiple weight measurements and error calculations. When the difference between two measurement errors is within the threshold, the calibration is considered successful. If the difference exceeds the threshold, the model is corrected by fitting historical data, and the weight of the standard weight is automatically adjusted and recalibrated. This mechanism enables the system to have an adaptive calibration function, which can automatically optimize and adjust according to different error conditions, further improving the accuracy and stability of the calibration.

[0040] 6. The present invention realizes the real-time correction of the zero drift and linear drift of the weighing sensor through the coordinated work of the real-time data acquisition module, the error calculation module and the parameter update module, ensuring the long-term stability of the weighing sensor. At the same time, the system's multiple measurements and error correction algorithms make the calibration process more efficient and reduce unnecessary repeated operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them:

[0042] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0043] Figure 2 It is a schematic diagram of the connection structure between the weight calibration control system and the weighing coal feeder of the present invention.

[0044] Figure 3 It is a schematic side sectional structural diagram of the weighing coal feeder of the present invention.

[0045] Figure 4 It is a semi-sectional structural schematic diagram of the weighing coal feeder of the present invention.

[0046] Figure 5 For the present invention Figure 4 Schematic diagram of the structure viewed from above.

[0047] Figure 6 It is a partial structural schematic diagram of the weight calibration control system of the present invention.

[0048] Figure 7It is a schematic diagram of the overall structure of the weight installation mechanism of the present invention.

[0049] Figure 8 It is a partial side structural schematic diagram of the weight installation mechanism of the present invention.

[0050] Fig. 9 It is a partial top view of the structure of the present invention.

[0051] In the figure: 100, weight calibration system; 101, historical data acquisition module; 102, weight parameter calibration module;

[0052] 200, weight calibration control system; 201, horizontal displacement mechanism; 2011, horizontal slide rail; 2012, horizontal screw rod; 2013, translation slide seat; 2014, motor; 202, weight lifting mechanism; 2021, lifting slide rail; 2022, lifting screw rod; 2023, lifting slide seat; 2024, descending rack group; 2025, ascending rack group; 2026, transmission gear; 203, weight installation mechanism; 2031, weight bracket; 2032, weight rotating shaft; 2033, weight installation roller; 2034, standard weight; 204, weight state switching mechanism; 2041, clamping buckle; 2042, guide pin shaft; 2043, guide slide seat; 2044, guide slide groove; 2045, connecting frame;

[0053] 300, sensor calibration system; 301, real-time data acquisition module; 302, error calculation module; 303, parameter update module;

[0054] 400. Weighing coal feeder; 401. Coal conveyor; 402. Weighing sensor; 403. Weight measuring area. DETAILED DESCRIPTION

[0055] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0056] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0057] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0058] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the embodiments of the present invention in detail, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0059] Example 1

[0060] Reference Figures 1 to 9 , which is the first embodiment of the present invention, provides an automatic calibration device for a weighing coal feeder device, including a weight calibration system 100, a weight calibration control system 200, a sensor calibration system 300 and a weighing coal feeder 400;

[0061] The weight calibration system 100 is data-connected with the weighing coal feeder 400, which includes a coal conveyor 401 and a weighing sensor 402 arranged on the coal conveyor 401, and the weight verification control system 200 is arranged above the coal conveyor 401; the weight calibration system 100 extracts historical data from the weighing sensor 402 of the weighing coal feeder 400, dynamically predicts the accuracy change of the weighing sensor 402 according to the error data of the weighing sensor 402 and in combination with environmental parameters, calculates the weight of the standard weight 2034 closest to the current calibration requirement, and performs accuracy verification on the weighing sensor 402 through the weight verification control system 200; the sensor calibration system 300 is arranged in the weighing sensor 402, and the weight verification control system 200 performs error calibration on the weighing sensor 402 according to the accuracy verification result;

[0062] The weight calibration system 100 includes a historical data acquisition module 101 and a weight parameter calibration module 102. The historical data acquisition module 101 is used to collect relevant data for calibration of the weighing sensor 402 on the weighing coal feeder 400. The relevant data for calibration of the weighing sensor 402 includes temperature data T(t), humidity data H(t), historical error data ε(t), environmental parameter data E(t), and drift parameter data δ(t). The weight parameter calibration module 102 is used to calculate the weight of the standard weight 2034 according to the current error of the weighing sensor 402 for fine calibration. The weight parameter calibration module 102 calculates the standard weight 2034W required for the current calibration. cal The weight is calculated as follows:

[0063] Where, ΔW error is the error weight of the weighing sensor 402, which is calculated as follows: ΔW error =ε pred (t)·W max In this formula, W maxis the maximum weighing capacity of the weighing coal feeder 400;

[0064] ε pred (t) is the error range of the weighing sensor 402, and its calculation formula is as follows:

[0065]

[0066] In this formula, historical error data ε(t): measurement error of weighing sensor 402 obtained from historical records; temperature data T(t): temperature change in the working environment of weighing sensor 402; humidity data H(t): humidity change in the working environment of weighing sensor 402; environmental parameter data E(t): other factors that affect measurement accuracy such as air density and vibration; drift parameter data δ(t): zero drift and linear drift of weighing sensor 402 after long-term operation;

[0067] α, β1, β2, and γ are all coefficients of the multivariate linear regression model. The coefficient data is fitted according to the historical data. The multivariate linear regression model is constructed through the above historical error data, temperature data, humidity data, and environment; represents the future rate of change of the load cell 402 error predicted by the multivariate linear regression model;

[0068] The present invention introduces historical error data, environmental parameters such as temperature and humidity changes, and uses a multivariate linear regression model to dynamically predict the error changes of the weighing sensor, and calculates the standard weight that is closest to the current calibration requirements. The calibration method in the prior art is usually fixed weight calibration, which fails to dynamically consider environmental and historical error factors, resulting in insufficient calibration accuracy. The present invention breaks through the traditional calibration mode and makes the calibration more intelligent and adaptable.

[0069] The weight calibration control system 200 includes a weight horizontal displacement mechanism 201, a weight lifting mechanism 202, a weight installation mechanism 203, and a weight state switching mechanism 204; wherein the weight horizontal displacement mechanism 201 includes a horizontal slide rail 2011, the horizontal slide rail 2011 has a built-in horizontal screw rod 2012, the horizontal screw rod 2012 is threadedly connected to a translation slide 2013, and the end of the horizontal screw rod 2012 is connected to a motor 2014; the weight lifting mechanism 202 includes a lifting slide rail 2021 connected to the translation slide 2013, and the lifting mechanism 2021 is connected to the translation slide 2013. A lifting screw 2022 is arranged in the descending slide rail 2021, and the end of the lifting screw 2022 is connected to a transmission gear 2026. A descending rack group 2024 and an ascending rack group 2025 are respectively arranged on the left and right inner walls of the weighing coal feeder 400. The two rack groups are staggered front and back to each other so that they are alternately meshed with the two sides of the transmission gear 2026 to control the transmission gear 2026 to rotate alternately in the forward and reverse directions; the lifting screw 2022 is mechanically connected to a lifting slide 2023, and the lifting slide 2023 is connected to a weight installation mechanism 203;

[0070] The weight installation mechanism 203 includes a weight bracket 2031 connected to the lifting slide 2023, the weight bracket 2031 is rotatably connected to a weight shaft 2032, the weight shaft 2032 is connected to a weight installation roller 2033 through a coupling that is easy to disassemble, and a standard weight 2034 that is easy to disassemble and assemble is arranged on the weight installation roller 2033, and the standard weight 2034 is arranged above the coal conveyor 401 of the weighing coal feeder 400; the weight bracket 2031 is provided with a weight rotation hole used in conjunction with the weight shaft 2032, and the weight bracket 2031 in the middle of the weight rotation hole is provided with a weight rotation hole. A clamping groove is provided on each side; multiple groups of standard weights 2034 are provided, and a coupling clamp block is arranged on the inner ring of each group of standard weights 2034, and a coupling clamp slot 2036 used in conjunction with the coupling clamp block is provided on the weight installation roller 2033, and multiple positioning holes are provided at equal intervals on the weight installation roller 2033, and positioning bolts are threadedly connected to the standard weights 2034, and the positioning bolts are threadedly installed in the corresponding positioning holes, so that the calibration device can disassemble or replace the standard weights 2034 according to the weighing requirements, and quickly adjust the overall weight of the standard weights 2034 to adapt to different weighing conditions;

[0071] The weight state switching mechanism 204 includes clamping buckles 2041 respectively arranged in two clamping grooves, the clamping buckles 2041 are connected with a translation control component, and the translation control component is connected with the weight lifting mechanism 202, so that during the lifting and lowering process of the weight lifting mechanism 202, the two groups of clamping buckles 2041 are controlled by the translation control component to approach or move away from each other, so as to realize the tightening and loosening function of the weight rotating shaft 2032; the two groups of clamping buckles 2041 are connected with the weight bracket 2031 for left and right sliding, the clamping buckles 2041 are arranged with guide pins 2042, the guide pins 2042 are sleeved with guide slides 2043, and the guide slides 2043 are provided with guide grooves 2044 arranged downwardly inclined, and the guide slides 204 ..., and the guide slides 2044 are provided with guide grooves 2044, and the guide slides 2044 are provided with guide grooves 2044, and the guide slides 2044 are provided with guide grooves 2044, and the guide slides 20 The guide pin 2042 is slidably connected with the guide slot 2044; a group of guide slots 2044 are respectively provided on both sides of the guide slide 2043, and the two groups of guide slots 2044 are arranged in an "eight" shape; the top of the guide slide 2043 is connected with a connecting frame 2045, and the end of the connecting frame 2045 away from the guide slide 2043 is slidably connected with the lifting slide rail 2021 up and down, so that when the weight bracket 2031 is lifted and lowered, the connecting frame 2045 slides down to a certain height and the position remains unchanged, and the guide pin 2042 slides up and down in the guide slot 2044, thereby controlling the two groups of clamping buckles 2041 to approach or move away from each other, so as to realize the loosening and tightening function of the weight shaft 2032;

[0072] The automated physical operation and calibration process optimization in the present invention realizes the fully automatic horizontal displacement, lifting and state switching of the weights during the calibration process through the sophisticated design of the weight calibration control system, overcoming the problems of cumbersome manual operation and large errors in the prior art. At the same time, the high degree of automation of the calibration process improves the continuity and efficiency of the equipment operation.

[0073] Through the coordination of the above mechanisms, the weight verification control system 200 can realize the automatic horizontal displacement, lifting adjustment and state switching of the weights in the weighing coal feeder 400. During the verification process, the system can accurately control the position and state of the weights, thereby ensuring the accuracy and stability of the weighing process and improving the working efficiency of the overall system.

[0074] The sensor calibration system 300 includes a real-time data acquisition module 301, an error calculation module 302 and a parameter update module 303. The real-time data acquisition module 301 is used to collect the output signal of the weighing sensor 402, such as voltage or digital signal, in real time, and record and compare it with the actual weight of the standard weight 2034; the error calculation module 302 is used to calculate the zero drift and linear drift of the weighing sensor 402 and generate an error correction value; the parameter update module 303 uses the built-in program of the weighing sensor 402 to update the correction parameters of the weighing sensor 402 in real time according to the correction value calculated by the error calculation module 302; the steps of the error calculation module 302 calculating the error correction value of the weighing sensor 402 are as follows:

[0075] The first weight measurement is performed, and the initial measurement value W1 of the standard weight 2034 is recorded by the weighing sensor 402. s , the initial error is calculated by the following formula:

[0076] The second weight measurement is performed, and the secondary measurement value W2 of the standard weight 2034 is recorded by the weighing sensor 402, and the secondary error is calculated by the following formula:

[0077] Cross validation: If |ε1-ε2|≤ε threshold , the calibration is considered successful, otherwise the system triggers the adjustment mechanism, refits the correction model through historical data, and calculates the weight of the adjusted standard weight 2034 Repeat the calibration process, the specific calculation formula is: Where, λ: adjustment coefficient, the range is positive, used to smooth the calibration error;

[0078] Combining the two weight measurement results, a correction value ΔW is generated. The calculation formula is as follows:

[0079] The present invention also provides a calibration method for the automatic calibration device of the weighing coal feeder device described above, characterized in that the specific steps are as follows:

[0080] Step 1: When calibration is required, first collect the calibration data of the weighing sensor 402 on the weighing coal feeder 400 through the historical data acquisition module 101, and calculate the weight of the standard weight 2034 according to the current error of the weighing sensor 402 through the weight parameter calibration module 102, so as to optimize the accuracy and efficiency of the calibration, rather than calibrating with a single fixed weight;

[0081] Step 2: Install the standard weight 2034 of the corresponding standard weight on the weight installation roller 2033, and set the weighing sensor 402 to zero; start the motor 2014, so that the motor 2014 drives the horizontal screw rod 2012 to rotate, and the horizontal screw rod 2012 is connected to the translation slide 2013 through the mechanical transmission, so that the translation slide 2013 drives the lifting slide rail 2021 to move horizontally along the direction of the coal conveyor 401; when the translation slide 2013 moves to the weighing area 403 of the coal conveyor 401, the transmission gear 2026 at the top of the lifting screw rod 2022 is connected to the weighing coal feeder 401. The lower rack set 2024 on the side contacts with the lower rack set 2024, so that the transmission gear 2026 rotates forwardly, and the transmission gear 2026 drives the lifting screw rod 2022 to rotate synchronously, so that the lifting slide 2023 is connected with the lifting screw rod 2022 through the mechanical transmission, and drives the standard weight 2034 to descend in height through the weight bracket 2031. At the same time, the connecting frame 2045 fixes the guide slide 2043 in an unchanged position, and the guide pin shaft 2042 slides downward in the guide slide groove 2044, so that it can drive the clamping buckle 2041 to move away from each other, so that the clamping buckle 2041 releases the clamping function of the weight rotating shaft 2032;

[0082] At the same time, after the standard weight 2034 is lowered to a suitable height, it precisely contacts the surface of the coal conveyor 401 of the weighing coal feeder 400, so that the standard weight 2034 rolls in the weighing area 403 of the coal conveyor 401, and the weight of the standard weight 2034 is weighed by the weighing sensor 402, and the data of this time is recorded; during the rolling process of the standard weight 2034 in the weighing area 403, the transmission gear 2026 is separated from the descending rack set 2024, and the meshing is released;

[0083] When the standard weight 2034 is rolled from the weighing area 403, the weighing sensor 402 monitors the output of the weighing sensor 402 in real time and collects the relevant data of the first calibration through the built-in sensor calibration system 300; at the same time, the transmission gear 2026 contacts the rising rack group 2025 on the other side of the weighing coal feeder 400, so that the transmission gear 2026 rotates in the opposite direction, and the transmission gear 2026 drives the lifting screw 2022 to rotate in the opposite direction synchronously, so that the lifting slide 2023 is connected with the lifting screw 2022 through the mechanical transmission, and drives the standard weight 2034 to rise in height through the weight bracket 2031. At the same time, the connecting frame 2045 fixes the guide slide 2043 in an unchanged position, and the guide pin shaft 2042 slides upward in the guide slide groove 2044, so that it can drive the clamping buckle 2041 to approach each other until the weight rotating shaft 2032 is clamped by the clamping buckle 2041; then according to the above principle, the standard weight 2034 is driven to move to the tail end of the coal conveyor 401;

[0084] Step 3: According to the above steps and principles, the standard weight 2034 is controlled to move from the tail end to the front end of the coal conveyor 401 to perform a second calibration on the weighing sensor 402. The weighing sensor 402 is used through the built-in sensor calibration system 300 to monitor the output of the weighing sensor 402 in real time and collect relevant data of the second calibration;

[0085] Step 4: Calculate the difference between the current weighing value and the standard weight 2034 through the built-in error calculation algorithm to generate a correction value; use the built-in program to directly update the correction parameters inside the weighing sensor 402; store the updated parameters in the built-in EEPROM or external storage device, and finally output the corrected weighing data.

[0086] The present invention uses a cross-validation and error adjustment mechanism to automatically readjust the weight and recalibrate when the first calibration fails, thereby achieving adaptive error correction. This design ensures the accuracy of the calibration, reduces human intervention, and has stronger automation and intelligent features.

[0087] Example 2

[0088] This is the second embodiment of the present invention. This embodiment is different from the first embodiment in that: in order to verify the technical advantages of this solution, this embodiment uses a certain type of weighing coal feeder device, equipped with a weighing sensor with a maximum weighing capacity of 500 kg, a working environment temperature range of 10°C to 40°C, and a humidity range of 30% to 80%. The goal of the embodiment is to evaluate the calibration accuracy and efficiency of the automatic calibration device of the present invention and compare it with the traditional fixed weight calibration method.

[0089] First, the calibration data of the weighing sensor 402 under different environmental conditions, including temperature, humidity, historical error data, drift parameters, etc., are collected through the historical data acquisition module 101. Based on these data, the current error trend of the weighing sensor is calculated through the error trend prediction algorithm. Specifically, the multivariate linear regression model is used to predict the rate of change of future errors, so as to dynamically adjust the weight of the standard weight 2034. After calculation, the weights of two calibration standard weights are selected, which are 100 kg and 300 kg respectively, for different calibration stages.

[0090] Then, a 100 kg standard weight 2034 is installed on the weight installation roller 2033, and the weighing sensor is set to zero. The horizontal screw rod 2012 is driven by the motor 2014 to rotate, and the weight is controlled to move horizontally to the weighing area 403. After the transmission gear 2026 is engaged with the descending rack set 2024, the lifting screw rod 2022 is driven to rotate, so that the standard weight 2034 is lowered and precisely contacted with the conveyor surface. The weighing sensor records the weighing data, and then the weight is raised and moved to the end of the conveyor, and then the second weighing is performed.

[0091] Finally, the first and second weight measurement errors are calculated according to the weight measurement and error calculation formula. Assume that the first weight measurement value is 99.5 kg, the error is 0.5%, and the second weight measurement value is 99.8 kg, the error is 0.2%. Through the cross-validation of the two weight measurement data, it is judged whether the calibration is successful. If |error value|≤0.3%, the calibration is considered successful, otherwise the correction model is refitted by adjusting the coefficient (range 0.1 to 0.5) to update the weight of the standard weight 2034.

[0092] The specific experimental data are shown in the following table:

[0093]

[0094] By comparing the test data, we can know that:

[0095] Improved accuracy: The error rates of the weight measurement in the automated calibration process of the present invention are 0.5% and 0.2% respectively, while the error rate of the traditional manual calibration is 1.5%. Obviously, the method of dynamically adjusting the weight of the standard weight adopted by the present invention can calibrate more accurately under different environmental conditions.

[0096] Improved efficiency: The total calibration time of the automated calibration of the present invention is 30 minutes, including data collection, weight movement, weight measurement, and correction parameter update. Traditional manual calibration takes 45 minutes and cannot achieve dynamic error correction. The present invention significantly shortens the calibration time and improves work efficiency.

[0097] Improved stability: The present invention uses a built-in sensor calibration system to monitor and adjust the calibration parameters in real time, so that the calibration results remain consistent in multiple measurements, and the fluctuation of the measurement data is within ±0.1%. The error fluctuation of the traditional method is ±0.3%, which has certain stability issues.

[0098] Enhanced adaptability: The present invention predicts error changes through multivariate linear regression, and can adapt to environments with large changes in temperature and humidity, with calibration accuracy maintained within 0.3%. However, the error of traditional calibration methods rises to more than 1% when the environment changes greatly.

[0099] The test data of the embodiment proves that the automatic calibration device and calibration method of the present invention are superior to the traditional fixed weight calibration method in terms of accuracy, efficiency, stability and adaptability. By dynamically adjusting the weight of the weight, updating the correction parameters in real time and cross-validating the errors, the present invention solves the problems of low calibration accuracy, cumbersome process and poor adaptability in the prior art, and embodies innovation and technical advantages.

[0100] Update calibration parameters and record data: After calculating the correction value, store the correction parameter in the EEPROM of the weighing sensor. Repeat the above process to perform further calibration using a 300 kg standard weight.

[0101] Comparative test of traditional fixed weight calibration: Use fixed 100 kg and 300 kg weights to perform traditional manual calibration respectively. Manual calibration is only calibrated once without adjusting the weight.

[0102] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. An automatic calibration device for a weighing coal feeder device, characterized in that: It comprises a weight calibration system (100), a weight verification control system (200), a sensor calibration system (300) and a weighing coal feeder (400); The weight calibration system (100) is data-connected to a weighing coal feeder (400), the weighing coal feeder (400) comprising a coal conveyor (401) and a weighing sensor (402) arranged on the coal conveyor (401), and the weight verification control system (200) is arranged above the coal conveyor (401); the weight calibration system (100) extracts historical data from the weighing sensor (402) of the weighing coal feeder (400), dynamically predicts the accuracy change of the weighing sensor (402) based on the error data of the weighing sensor (402) and in combination with environmental parameters, calculates the weight of the standard weight (2034) closest to the current calibration requirement, and performs accuracy verification on the weighing sensor (402) through the weight verification control system (200); the sensor calibration system (300) is arranged in the weighing sensor (402), and the weight verification control system (200) performs error calibration on the weighing sensor (402) based on the accuracy verification result; The weight calibration control system (200) comprises a weight horizontal displacement mechanism (201), a weight lifting mechanism (202), a weight installation mechanism (203), and a weight state switching mechanism (204); wherein the weight horizontal displacement mechanism (201) comprises a horizontal slide rail (2011), the horizontal slide rail (2011) has a built-in horizontal lead screw (2012), the horizontal lead screw (2012) is threadedly connected to a translation slide seat (2013), and the end of the horizontal lead screw (2012) is connected to a motor (2014); the weight lifting mechanism (202) comprises a lifting slide rail (2021) connected to the translation slide seat (2013); ), a lifting screw (2022) is arranged inside the lifting slide rail (2021), and the end of the lifting screw (2022) is connected to a transmission gear (2026), and a descending rack group (2024) and an ascending rack group (2025) are respectively arranged on the left and right inner walls of the weighing coal feeder (400), and the two rack groups are staggered front and back to each other so that they are alternately meshed with the two sides of the transmission gear (2026) to control the transmission gear (2026) to rotate alternately in forward and reverse directions; the lifting screw (2022) is mechanically connected to a lifting slide seat (2023), and the lifting slide seat (2023) is connected to a weight installation mechanism (203); The weight installation mechanism (203) comprises a weight bracket (2031) connected to the lifting slide (2023); the weight bracket (2031) is rotatably connected to a weight rotating shaft (2032); the weight rotating shaft (2032) is connected to a weight installation roller (2033) via a coupling that is easy to disassemble; a standard weight (2034) that is easy to disassemble and assemble is arranged on the weight installation roller (2033); the standard weight (2034) is arranged above the coal conveyor (401) of the weighing coal feeder (400); a weight rotating hole for use with the weight rotating shaft (2032) is provided on the weight bracket (2031); a clamping groove is provided on both sides of the weight bracket (2031) in the middle of the weight rotating hole; The weight state switching mechanism (204) comprises clamping buckles (2041) respectively arranged in two clamping grooves, the clamping buckles (2041) are connected to a translation control component, and the translation control component is connected to the weight lifting mechanism (202), so that during the lifting and lowering process of the weight lifting mechanism (202), the two groups of clamping buckles (2041) are controlled by the translation control component to move closer to or farther away from each other, thereby realizing the loosening and tightening function of the weight rotating shaft (2032).

2. The automatic calibration device for a weighing coal feeder device according to claim 1, characterized in that: The weight calibration system (100) comprises a historical data collection module (101) and a weight parameter calibration module (102). The historical data collection module (101) is used to collect relevant data for calibration of a weighing sensor (402) on a weighing coal feeder (400). The weight parameter calibration module (102) is used to calculate the weight of a standard weight (2034) according to a current error of the weighing sensor (402) for fine calibration.

3. The automatic calibration device for a weighing coal feeder device according to claim 2, characterized in that: The relevant data for weighing sensor (402) calibration include temperature data T(t), humidity data H(t), historical error data ε(t), environmental parameter data E(t), and drift parameter data δ(t).

4. The automatic calibration device for a weighing coal feeder device according to claim 3, characterized in that: The weight parameter calibration module (102) calculates the weight W of the standard weight (2034) required for the current calibration. cal The calculation formula is as follows: Where, ΔW error is the error weight of the weighing sensor (402), which is calculated as follows: ΔW error =ε pred (t)·W max In this formula, W max is the maximum weighing capacity of the weighing coal feeder (400); ε pred (t) is the error range of the weighing sensor (402), and its calculation formula is as follows: In the formula, historical error data ε(t): measurement error of the weighing sensor (402) obtained from historical records; temperature data T(t): temperature change in the working environment of the weighing sensor (402); humidity data H(t): humidity change in the working environment of the weighing sensor (402); environmental parameter data E(t): other factors that affect measurement accuracy such as air density and vibration; drift parameter data δ(t): zero drift and linear drift of the weighing sensor (402) after long-term operation; α, β1, β2, and γ are all coefficients of the multivariate linear regression model. The coefficient data is fitted according to the historical data. The multivariate linear regression model is constructed through the above historical error data, temperature data, humidity data, and environment; Represents the future rate of change of the load cell (402) error predicted by the multivariate linear regression model.

5. The automatic calibration device for a weighing coal feeder device according to claim 4, characterized in that: A plurality of groups of standard weights (2034) are provided, a coupling block is arranged on the inner ring of each group of standard weights (2034), a coupling slot (2036) used in conjunction with the coupling block is provided on the weight installation roller (2033), a plurality of positioning holes are provided at equal intervals on the weight installation roller (2033), a positioning bolt is threadedly connected to the standard weight (2034), and the positioning bolt is threadedly installed in the corresponding positioning hole, so that the calibration device can disassemble or replace the standard weight (2034) according to the weighing requirements, and quickly adjust the overall weight of the standard weight (2034) to adapt to different weighing conditions.

6. The automatic calibration device for a weighing coal feeder device according to claim 5, characterized in that: The two groups of clamping buckles (2041) are slidably connected to the weight bracket (2031) left and right, the clamping buckle (2041) is provided with a guide pin shaft (2042), the guide pin shaft (2042) is sleeved with a guide slide seat (2043), the guide slide seat (2043) is provided with a guide slide groove (2044) arranged downwardly inclined, and the guide pin shaft (2042) is slidably connected to the guide slide groove (2044).

7. The automatic calibration device for a weighing coal feeder device according to claim 6, characterized in that: A group of guide slots (2044) are respectively provided on both sides of the guide slide (2043), and the two groups of guide slots (2044) are arranged in an "eight"-shaped structure; a connecting frame (2045) is connected to the top of the guide slide (2043), and one end of the connecting frame (2045) away from the guide slide (2043) is connected to the lifting slide rail (2021) for sliding up and down connection, so that when the weight bracket (2031) is lifted or lowered, the connecting frame (2045) slides down to a certain height and the position remains unchanged, and the guide pin shaft (2042) slides up and down in the guide slot (2044), thereby controlling the two groups of clamping buckles (2041) to approach or move away from each other, thereby realizing the loosening and tightening function of the weight rotating shaft (2032).

8. The automatic calibration device for a weighing coal feeder device according to claim 7, characterized in that: The sensor calibration system (300) comprises a real-time data acquisition module (301), an error calculation module (302) and a parameter update module (303), wherein the real-time data acquisition module (301) is used to collect the output signal of the weighing sensor (402) in real time and record the actual weight compared with the standard weight (2034); the error calculation module (302) is used to calculate the zero drift and linear drift of the weighing sensor (402) and generate an error correction value; and the parameter update module (303) uses the built-in program of the weighing sensor (402) to update the correction parameters of the weighing sensor (402) in real time according to the correction value calculated by the error calculation module (302).

9. The automatic calibration device for a weighing coal feeder device according to claim 8, characterized in that: The steps of the error calculation module (302) calculating the error correction value of the weighing sensor (402) are as follows: The first weight measurement is performed, and the initial measurement value W1 of the standard weight (2034) is recorded by the weighing sensor (402). s , the initial error is calculated by the following formula: The second weight measurement is performed, and the secondary measurement value W2 of the standard weight (2034) is recorded by the weighing sensor (402), and the secondary error is calculated by the following formula: Cross validation: If |ε1-ε2|≤ε threshold , the calibration is considered successful, otherwise the system triggers the adjustment mechanism, refits the correction model through historical data, and calculates the weight of the adjusted standard weight (2034) Repeat the calibration process, the specific calculation formula is: Where, λ: adjustment coefficient, the range is positive, used to smooth the calibration error; Combining the two weight measurement results, a correction value ΔW is generated. The calculation formula is as follows:

10. The calibration method of the automatic calibration device of the weighing coal feeder device according to claim 9, characterized in that: The specific steps are as follows: Step 1: When calibration is required, firstly collect calibration data related to the weighing sensor (402) on the weighing coal feeder (400) through the historical data acquisition module (101), and calculate the weight of the standard weight (2034) according to the current error of the weighing sensor (402) through the weight parameter calibration module (102), so as to optimize the accuracy and efficiency of the calibration, rather than calibrating with a single fixed weight; Step 2: Install a standard weight (2034) of a corresponding standard weight on a weight installation roller (2033), and set the weighing sensor (402) to zero; start the motor (2014), so that the motor (2014) drives the horizontal screw rod (2012) to rotate, and through the mechanical transmission connection between the horizontal screw rod (2012) and the translation slide (2013), the translation slide (2013) drives the lifting slide rail (2021) to move horizontally along the direction of the coal conveyor (401); when the translation slide (2013) moves to the weight measuring area (403) of the coal conveyor (401), the transmission gear (2026) at the top of the lifting screw rod (2022) and the weighing coal feeder (400 ) on one side of the guide rail (2044), so that the transmission gear (2026) rotates in the forward direction, and the transmission gear (2026) drives the lifting screw (2022) to rotate synchronously, so that the lifting slide (2023) is connected with the lifting screw (2022) through mechanical transmission, and drives the standard weight (2034) to decrease in height through the weight bracket (2031). At the same time, the connecting frame (2045) fixes the guide slide (2043) in an unchanged position, and the guide pin shaft (2042) slides downward in the guide slide groove (2044), so that it can drive the clamping buckle (2041) to move away from each other, so that the clamping buckle (2041) releases the clamping function of the weight rotating shaft (2032); At the same time, after the standard weight (2034) is lowered to a suitable height, it precisely contacts the surface of the coal conveyor (401) of the weighing coal feeder (400), so that the standard weight (2034) rolls in the weighing area (403) of the coal conveyor (401), and the weight of the standard weight (2034) is measured by the weighing sensor (402), and the data of this time is recorded; during the rolling process of the standard weight (2034) in the weighing area (403), the transmission gear (2026) is separated from the descending rack group (2024), and the meshing is released; When the standard weight (2034) has rolled from the weighing area (403), the weighing sensor (402) monitors the output of the weighing sensor (402) in real time and collects the relevant data of the first calibration through the built-in sensor calibration system (300); at the same time, the transmission gear (2026) contacts the rising rack group (2025) on the other side of the weighing coal feeder (400), so that the transmission gear (2026) rotates in the opposite direction, and the transmission gear (2026) drives the lifting screw (222) to rotate in the opposite direction synchronously, so that the lifting slide (2023) passes The standard weight (2034) is driven to rise in height through the weight bracket (2031) by the mechanical transmission connection with the lifting screw rod (2022). At the same time, the connecting frame (2045) fixes the guide slide seat (2043) in a constant position, and the guide pin shaft (2042) slides upward in the guide slide groove (2044), so that it can drive the clamping buckle (2041) to approach each other until the weight rotating shaft (2032) is clamped by the clamping buckle (2041); and then the standard weight (2034) is driven to move to the tail end of the coal conveyor (401) according to the above principle; Step 3: According to the above steps and principles, the standard weight (2034) is controlled to move from the rear end of the coal conveyor (401) to the front end thereof, and the weighing sensor (402) is subjected to a second calibration. The weighing sensor (402) is used to monitor the output of the weighing sensor (402) in real time through the built-in sensor calibration system (300) and collect relevant data of the second calibration; Step 4: Calculate the difference between the current weighing value and the standard weight (2034) by using the built-in error calculation algorithm to generate a correction value; use the built-in program to directly update the correction parameters inside the weighing sensor (402); store the updated parameters in the built-in EEPROM or an external storage device, and finally output the corrected weighing data.

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