Online quality calibration system

Abstract

The invention discloses an online detection and calibration mass system, which comprises a material transportation module, a force sensor and an upper computer, and is characterized in that the material transportation module is used for enabling a material to fall into the force sensor through free falling motion, the force sensor uploads the measured material measurement mass to the upper computer, and the upper computer carries out mass calibration based on the material measurement mass; the method for performing mass calibration by the upper computer comprises the following steps: acquiring the measured mass of a material; based on the material attributes, impact force generated by free falling motion of the materials is calculated; and subtracting a measurement difference value caused by the impact force from the measured mass of the material to obtain the real mass of the material, thereby completing mass calibration. According to the system, the impact force generated when the materials do free falling motion is calculated according to the impact force model, the damping vibration principle is used for calculating errors generated by impact, the impact force can be eliminated, the real mass of the materials at each moment can be detected in real time, and the mass of bulk solids in the industry can be dynamically monitored on line.

Description

Technical Field

[0001] The present disclosure relates to the technical field related to dynamically measuring the mass of materials, and particularly to an on-line quality calibration system. Background Art

[0002] During the transportation, storage, and processing of materials, accurately measuring the mass of the moving materials is crucial for the control of the production process, the monitoring of the material flow rate, and the rational allocation of resources. During the feeding process, the materials are often in a free-fall state. This means that during the fall of the materials, the materials will be affected by the gravitational acceleration g (about 9.8 m / s 2 ), and accelerate downward. When the materials contact or impact the weighing device (or the receiving container), an impact force is generated instantaneously, resulting in the measured mass being greater than the actual mass. Applying traditional static weighing methods directly to such an instantaneous dynamic process often results in large errors. Even after the materials finally come to rest, the weighing device can obtain a reading close to the actual mass, but it is difficult to accurately capture the change in mass during the continuous falling process of the materials instantaneously or in real time.

[0003] The prior art cannot provide instantaneous and accurate dynamic mass measurement during the material feeding process, and there is an urgent need to improve the technical means for on-line accurate measurement of material mass. To address this problem, the present invention proposes an on-line detection and calibration quality system. This method calibrates the error generated by the free-fall impact by establishing an impact dynamic model, obtains the actual mass of the materials during the falling process, and realizes the dynamic monitoring of the mass of the free-falling materials. Through this method, the limitation of the prior art in accurately dynamically measuring the instantaneous mass of materials can be overcome, the quality change can be feedback in real time, and accurate data support can be provided for the control of the production process, material monitoring, and optimization. Summary of the Invention

[0004] The present invention provides an on-line quality calibration system, and its technical objective is to compensate for the error generated by the free-fall impact by establishing an impact dynamic model, calibrate the mass of the materials falling onto the mass measurement device, and obtain its actual mass. It solves the problem that the static mass detection device cannot accurately measure the instantaneous actual mass of the free-falling materials.

[0005] According to the first aspect of the embodiments of the present application, a system is provided, including a material transportation module, a force sensor, and a host computer. The material transportation module is used to make the materials fall into the force sensor through free-fall motion. The force sensor uploads the measured material measurement mass to the host computer, and the host computer performs quality calibration based on the material measurement mass;

[0006] Among them, the method for the host computer to perform quality calibration includes:

[0007] Obtain the material measurement mass;

[0008] Calculate the impact force generated by the free-fall motion of the material based on the material properties;

[0009] Subtract the measurement difference caused by the impact force from the measured mass of the material to obtain the true mass of the material, thereby completing the mass calibration.

[0010] Further, the material transportation module may include a silo disposed above the measurement area of the force sensor and a storage bin disposed on the surface of the force sensor, and the material falls into the storage bin after free-fall motion.

[0011] Further, the impact force generated by the free-fall motion of the material is calculated by the following formula:

[0012] F 冲 (t) = cA·e -λT [ωcos(ωT + φ) - λsin(ωT + φ)] + kA·e -λT sin(ωT + φ)

[0013] Wherein, c represents the damping coefficient of the material; k represents the elastic coefficient of the material, A represents the amplitude, φ represents the initial phase, and T represents the falling time of the material.

[0014] Further, the amplitude A is solved by the following formula:

[0015] x(t) = A·e -λT sin(ωT + φ)

[0016] Wherein, x(T) is the displacement generated by the falling of the material, and is obtained by fitting with the measured mass m 测 (t).

[0017] Further, the true mass m 真 (t) of the material is calculated by the following formula:

[0018]

[0019] Wherein, g represents the acceleration due to gravity, m 测 (t) represents the measured mass of the material, and F 冲 (t) represents the impact force.

[0020] According to the second aspect of the embodiments of the present application, there is provided a computer program product, including computer programs / instructions, which when executed by a processor, implement the method for mass calibration of the host computer in the system as described in the first aspect.

[0021] According to the third aspect of the embodiments of the present application, there is provided an electronic device, including:

[0022] One or more processors;

[0023] A memory for storing one or more programs;

[0024] When the one or more programs are executed by the one or more processors, the one or more processors implement the method for the host computer to perform quality calibration in the system as described in the first aspect.

[0025] According to a fourth aspect of the embodiments of the present application, there is provided a computer-readable storage medium, on which computer instructions are stored, and when the instructions are executed by a processor, the steps of the method for the host computer to perform quality calibration in the system as described in the first aspect are implemented.

[0026] The technical solutions provided by the embodiments of the present application may include the following beneficial effects:

[0027] As can be seen from the above embodiments, the present application uses a high-precision force sensor, an impact force model, and an online quality calibration method for the host computer, and calculates the error generated by the impact using the principle of damped vibration, so as to obtain real-time material true mass data. Through this method, not only can the limitation of the prior art in accurately dynamically measuring the material mass be overcome, but also the quality change can be real-time feedback, providing strong data support for production process control, material monitoring, and optimization, and having important application value and broad promotion prospects.

[0028] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The drawings herein are incorporated into the specification and form a part of the specification, showing embodiments consistent with the present application, and are used together with the specification to explain the principles of the present application.

[0030] Figure 1 is a schematic diagram of an online quality calibration system shown according to an exemplary embodiment.

[0031] Figure 2 is a flowchart of the host computer performing quality calibration in an online quality calibration system shown according to an exemplary embodiment.

[0032] Figure 3 is a schematic diagram of an electronic device shown according to an exemplary embodiment.

[0033] Reference numerals: 1, silo; 2, storage bin; 3, force sensor; 4, host computer. DETAILED DESCRIPTION

[0034] Exemplary embodiments will be described in detail herein, and examples thereof are shown in the accompanying drawings. When the following description refers to the accompanying drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application.

[0035] The terms used in this application are for the purpose of describing specific embodiments only and are not intended to limit the present application. The singular forms "a", "the", and "said" used in this application and the appended claims are also intended to include the plural forms unless the context clearly dictates otherwise. It should also be understood that the term "and / or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.

[0036] It should be understood that although the terms first, second, third, etc. may be used in this application to describe various information, such information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of the present application, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Depending on the context, the word "if" as used herein may be interpreted as "when" or "while" or "in response to a determination".

[0037] As Figure 1 shown, the present application provides an online quality calibration system, which includes a material transportation module, a force sensor 3, and a host computer 4. The material transportation module is used to make the material fall into the force sensor 3 through free fall. The force sensor 3 uploads the measured material mass to the host computer 4, and the host computer 4 performs quality calibration based on the measured material mass.

[0038] Among them, as Figure 2 shown, the method for the host computer 4 to perform quality calibration includes:

[0039] Obtain the measured material mass;

[0040] Calculate the impact force generated by the free fall of the material based on the material properties;

[0041] Subtract the measurement difference caused by the impact force from the measured material mass to obtain the true mass of the material, thereby completing the quality calibration.

[0042] It should be noted that if the material rebounds after falling into the force sensor 3 and falls into the force sensor 3 again, it will bring a large measurement error. Therefore, the present application selects materials that are not easily rebounded (such as sponge blocks, wooden blocks, stone blocks, etc.) and sets the height difference between the silo 1 and the force sensor 3 according to the actual situation to avoid material rebound caused by too large a height difference.

[0043] In this embodiment, the material transportation module may include a silo 1 disposed above the measurement area of the force sensor 3 and a storage bin 2 disposed on the surface of the force sensor 3. After the material undergoes free-fall motion, it falls into the storage bin 2. In one embodiment, a silo 1 with a silo height of 1.0 m, a bottom square outlet size of 0.5×0.5 m 2 and a top square inlet size of 1.5×2.5 m 2 is used. The height difference between the outlet of the silo 1 and the inner bottom surface of the storage bin is 1 m.

[0044] In a specific implementation, the material transportation module may also select a conveyor belt or the like.

[0045] Specifically, the force sensor 3 employs a high-precision electronic scale at the millisecond level to continuously and accurately collect the mass of the material.

[0046] As the material falls from the silo 1, considering that stacking may occur between the materials, the displacement x(t) generated by the falling of the material is first fitted using the measured mass of the material:

[0047] m 测 (t) = -12166.06719e (-x(t) / 1.08518) +11293.22288 (1)

[0048] The above formula is obtained by software fitting. It should be noted that m 测 (t) is not the data directly measured by the force sensor 3 because there may be more than one material on the force sensor 3. Therefore, the difference between the currently measured data and the previous measured data is used as the measured mass m 测 (t) of the material that has newly fallen onto the force sensor 3.

[0049] After receiving it, the host computer 4 first calculates the impact force generated by the free-fall of the material.

[0050] For a damped harmonic vibration system, its motion equation is:

[0051]

[0052] where x(T) represents the displacement of the material, c represents the damping coefficient of the material; k represents the elastic coefficient of the material.

[0053] The general solution of the above formula (2) is:

[0054] x(T) = A·e -λT sin(ωT + φ) (3)

[0055] where φ represents the initial phase, which is obtained through multiple experiments, T represents the material falling time; A represents the amplitude, which is obtained by solving the above formula.

[0056] From formula (3), the solution speed is:

[0057]

[0058] The calculation formula for the impact force is:

[0059]

[0060] Substitute formulas (3) and (4) into formula (5) to obtain the impact force formula:

[0061] F 冲 (t) = cA·e -λT [ωcos(ωT + φ) - λsin(ωT + φ)] + kA·e -λT sin(ωT + φ) (6)

[0062] Subtract the measurement difference caused by the impact force from the measured mass of the material to obtain the true mass of the material. The formula is:

[0063]

[0064] Among them, g represents the acceleration due to gravity, which can be taken as 9.8 kg / s 2 ; m 真 (t) represents the true mass of the material;

[0065] Through the above system, the impact force generated by the material during free fall is calculated according to the impact force model, and the error caused by the impact is calculated using the principle of damped vibration. The true mass of the material at each moment detected in real time by eliminating the impact force can be obtained, which can overcome the limitation that the traditional static measurement method cannot accurately capture the instantaneous mass of a moving object, and perform on-line dynamic monitoring of the mass of bulk materials in industry.

[0066] Correspondingly, the present application also provides a computer program product, including computer programs / instructions, which when executed by a processor implement the method for mass calibration by the host computer 4 in the above on-line mass calibration system.

[0067] Correspondingly, the present application also provides an electronic device, including: one or more processors; a memory for storing one or more programs; when the one or more programs are executed by the one or more processors, the one or more processors implement the mass calibration by the host computer 4 in the above on-line mass calibration system. As Figure 3 shown, it is a hardware structure diagram of any device with data processing capabilities where the method for mass calibration by the host computer 4 in an on-line mass calibration system provided by an embodiment of the present invention is located. Except for Figure 3In addition to the processor, memory, and network interface shown, any device with data processing capabilities where the device in the embodiment is located usually includes other hardware according to the actual functions of the device with data processing capabilities, which will not be elaborated herein.

[0068] Correspondingly, the present application also provides a computer-readable storage medium, on which computer instructions are stored. When the instructions are executed by a processor, the method for quality calibration performed by the host computer 4 in the above online quality calibration system is implemented. The computer-readable storage medium may be an internal storage unit of any device with data processing capabilities described in any of the foregoing embodiments, such as a hard disk or memory. The computer-readable storage medium may also be an external storage device, such as a plug-in hard disk, a Smart Media Card (SMC), an SD card, a Flash Card, etc. equipped on the device. Further, the computer-readable storage medium may also include both an internal storage unit of any device with data processing capabilities and an external storage device. The computer-readable storage medium is used to store the computer program and other programs and data required by the device with data processing capabilities, and may also be used to temporarily store data that has been output or will be output.

[0069] After considering the specification and practicing the content disclosed herein, those skilled in the art will readily conceive of other embodiments of the present application. The present application is intended to cover any variations, uses, or adaptations of the present application, which follow the general principles of the present application and include well-known knowledge or conventional technical means in the technical field not disclosed in the present application.

Claims

1. An on-line quality calibration system, characterized in that, It includes a material transportation module, a force sensor and a host computer. The material transportation module is used to make the material fall into the force sensor through free-fall motion. The force sensor uploads the measured material mass to the host computer, and the host computer performs mass calibration based on the measured material mass. Among them, the method for the host computer to perform mass calibration includes: Obtain the measured material mass; Based on the material properties, calculate the impact force generated by the free-fall motion of the material; Subtract the measurement difference caused by the impact force from the measured material mass to obtain the true mass of the material, thereby completing the mass calibration.

2. The system according to claim 1, wherein The material transportation module may include a silo arranged above the measurement area of the force sensor and a storage bin arranged on the surface of the force sensor. After the free-fall motion of the material, it falls into the storage bin.

3. The system according to claim 1, wherein The impact force generated by the free-fall motion of the material is calculated by the following formula: F 冲 (t) = cA·e -λT [ωcos(ωT + φ) - λsin(ωT + φ)] + kA·e -λT sin(ωT + φ) Among them, c represents the damping coefficient of the material; k represents the elastic coefficient of the material, A represents the amplitude, φ represents the initial phase, and T represents the falling time of the material.

4. The system according to claim 3, wherein The amplitude A is solved by the following formula: x(t) = A·e -λT sin(ωT + φ) Among them, x(T) is the displacement generated by the falling of the material, which is obtained by fitting the measured mass m 测 (t) of the material.

5. The system according to claim 1, wherein The true mass m of the material 真 (t) is calculated by the following formula: where g represents the acceleration due to gravity, and m 测 (t) represents the measured mass of the material, and F 冲 (t) represents the impact force.

6. A computer program product, comprising a computer program / instructions, characterized in that, When the computer program / instructions are executed by the processor, the method for the host computer to perform mass calibration in the system according to any one of claims 1-5 is implemented.

7. An electronic device, characterized in that, It includes: One or more processors; A memory for storing one or more programs; When the one or more programs are executed by the one or more processors, the one or more processors implement the method for the host computer to perform mass calibration in the system according to any one of claims 1-5.

8. A computer-readable storage medium having computer instructions stored thereon, characterized in that, When the instruction is executed by the processor, the steps of the method for the host computer to perform mass calibration in the system according to any one of claims 1-5 are implemented.

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