Impact plate type dynamic metering equipment

Abstract

The invention discloses punching plate type dynamic metering equipment. Comprising a stock bin, a guide sliding groove communicated with the stock bin, an impulsive force sliding groove formed in the inclined lower portion of a discharging opening of the guide sliding groove, an impulsive force sensor connected to the impulsive force sliding groove, a microwave flowmeter unit arranged above the discharging opening of the guide sliding groove, and a data processing module electrically connected to the impulsive force sensor and the microwave flowmeter unit. The microwave flowmeter is located between the guiding sliding groove and the impulsive force sliding groove. The impulsive force sensor measures the flow value of materials falling into the impulsive force sliding groove in real time, the microwave flowmeter unit measures the sliding-out speed of the materials in real time, the data processing module calculates the absolute speed value to serve as the stable reference of the impulsive force sensor, and the non-contact measurement microwave flowmeter unit can keep the long-term precision stability of measurement. When the impact force sensor generates baseline drift, the microwave flowmeter unit can detect an error, and the impact force sensor can be dynamically calibrated through the data processing module according to an error value, so that the long-term precision and stability of metering equipment are ensured.

Description

Technical Field

[0001] This invention relates to the field of dynamic weighing technology, specifically to a punch-plate type dynamic metering device. Background Technology

[0002] In industries such as cement, metallurgy, chemicals, and grain processing, continuous and accurate metering of bulk solid materials is crucial for process control, cost accounting, and energy management. Currently, the most commonly used solid flow meters are plate flow meters.

[0003] Plate flow meters measure flow rate by measuring the force exerted on material as it flows over an inclined measuring plate. Their advantages include simple structure and direct measurement of mass flow rate. Disadvantages include susceptibility to changes in material impact force, feed velocity, mechanical zero-point drift, equipment wear, and material adhesion, resulting in poor long-term stability and requiring frequent calibration. Among these errors, the error caused by changes in the feed velocity is the most significant factor. Traditional plate flow meters primarily rely on the height difference of the material to infer its velocity through gravity, neglecting the initial velocity under gravitational acceleration. Since this initial velocity is variable, the resulting error is relatively large.

[0004] Microwave flow meters: Based on the Doppler effect, they measure the velocity of materials by emitting microwaves into them and receiving the echoes. Their advantages include non-contact measurement, immunity to wear and adhesion, and accurate velocity measurement. However, their disadvantage is that the final mass flow rate calculation depends on preset material density and flow column cross-sectional area; changes in these parameters can introduce significant errors.

[0005] In existing technologies, these two devices are typically used independently, and their inherent limitations restrict their application in high-end, high-precision metrology applications. Although there have been attempts to combine sensors based on different principles in existing technologies, these combinations mostly result in separate outputs, requiring manual comparison later on. They lack a deep, automated fusion mechanism and cannot achieve real-time self-calibration. Summary of the Invention

[0006] Therefore, the present invention aims to solve the problem that existing dynamic metering devices are difficult to calibrate in real time in high-precision metering situations and to ensure long-term metering accuracy and stability, thereby providing a punch plate type dynamic metering device.

[0007] To solve the above-mentioned technical problems, the technical solution of the present invention is as follows: A punch plate type dynamic metering device, comprising: The hopper is equipped with a feed inlet and a discharge outlet; A guide chute is inclined and connected to the hopper, with one end connected to the discharge port and the other end provided with a discharge port; The impact chute is spaced out and obliquely below the discharge port, and is located on the inclined extension line of the guide chute; An impact sensor is connected to the impact chute, and the impact sensor is adapted to measure in real time the flow rate of the material sliding from the guide chute onto the impact chute; A microwave flow meter unit is disposed above the discharge port of the guide chute and between the guide chute and the impact chute. The microwave flow meter unit is adapted to dynamically measure the velocity of the material rushing from the guide chute to the impact chute. An electronic instrument is provided with a data processing module electrically connected to the impact sensor and the microwave flow meter unit. The data processing module is adapted to compare the values ​​of the impact sensor and the microwave flow meter unit in real time, and to detect and calibrate the value of the impact sensor in real time through the value of the microwave flow meter unit.

[0008] Furthermore, the data processing module has the following execution steps: S1: Receive the raw force signal F(t) measured by the impact sensor and the velocity signal v(t) measured by the microwave flow meter unit; S2: Based on the momentum theorem, the instantaneous flow rate is calculated by the impulse sensor: q0=αkF(t), where k is the initial calibration coefficient and α is the direction coefficient; S3: Use the velocity signal v(t) measured by the microwave flowmeter unit as the reference velocity value; S4: Real-time comparison and adaptive calibration. The data processing module uses microwave velocity v(t) as a reference to continuously monitor the rationality of q0 calculation. When an error is detected between the theoretical force of the impact sensor and the actual measured force in real time, the calculation model is corrected in real time for adaptive calibration. S5: Output the final instantaneous flow rate q0 and cumulative flow rate Q.

[0009] Furthermore, in step S4, when the force sensor of the punching unit is detected to have a baseline drift ΔF due to zero-point drift, mechanical loosening, or material adhesion through real-time comparison, the dynamic calibration algorithm is activated to correct the calculation model in real time for adaptive calibration.

[0010] Furthermore, in step S4, the absolute velocity value measured by the microwave velocimeter is used as a stable reference. Based on the Doppler principle, the mass can be calculated by combining the recorded number and state of the falling particles. According to the momentum theorem, let α be the direction coefficient and t be the action time, then Fαt=mv, and the theoretical value of the force on the impact sensor is derived as F=mv(t) / αt.

[0011] Furthermore, in step S4, the error between the theoretical and actual measured forces is checked in real time. If the error exceeds 1%, the k coefficient of the force sensor calculation formula is corrected in real time.

[0012] Furthermore, it also includes a closed housing, in which the impact sensor, the electronic instrument, the impact chute, and the discharge port of the guide chute are all fixed.

[0013] Furthermore, a manual gate valve is provided at the discharge port of the silo, and an electric flow valve is provided between the manual gate valve and the guide chute.

[0014] Furthermore, the microwave flow meter unit, the impact sensor, and the electronic instrument are each individually covered with a sealed housing.

[0015] Furthermore, the impact sensor is electrically connected to the electronic instrument via a cable.

[0016] Furthermore, the cable is a flame-retardant cable.

[0017] The technical solution of this invention has the following advantages: 1. The dynamic metering device of the punch plate type provided by the present invention measures the mass flow rate of material sliding from the guide chute to the punch chute in real time through the impact force sensor, which can directly measure the mass flow rate of the material. In conjunction with the microwave flow meter unit, the velocity value of the material sliding out of the guide chute is measured in real time. The absolute velocity value is calculated by the data processing module and used as a stable reference for the impact force sensor. Since the microwave flow meter unit is a non-contact measurement, it can maintain the long-term accuracy and stability of the measurement. When the impact force sensor connected to the punch chute experiences baseline drift due to zero drift, mechanical loosening, or material adhesion, the microwave flow meter unit can detect the error. The data processing module can perform dynamic online calibration of the impact force sensor based on the measurement value with error, and correct it in real time, thus ensuring the long-term accuracy and stability of the metering device.

[0018] 2. The punching plate type dynamic metering device provided by the present invention further includes a closed housing, in which the impact sensor, electronic instrument, impact chute, and guide chute discharge port are all fixed. This configuration, by fixing the impact sensor, electronic instrument, and impact chute within the closed housing and providing support and fixation through the closed housing, improves the operational stability of the impact sensor, electronic instrument, and impact chute, ensuring metering stability.

[0019] 3. The dynamic metering device of the impact plate type provided by the present invention has its microwave flow meter unit, impact sensor, and electronic instrument each individually covered with a sealed enclosure. This arrangement can prevent damage to the microwave flow meter unit, impact sensor, and electronic instrument from vibration caused by material impact. Attached Figure Description

[0020] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the structure of the punch plate type dynamic metering device provided by the present invention. Explanation of reference numerals in the attached diagram: 1. Hopper; 101. Inlet; 102. Outlet; 2. Manual gate valve; 3. Electric flow valve; 4. Electronic instrument; 5. Guide chute; 501. Discharge port; 6. Microwave flow meter unit; 7. Impact sensor; 8. Impact chute; 9. Enclosed housing. Detailed Implementation

[0022] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0024] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0025] Furthermore, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0026] like Figure 1 The illustrated dynamic metering device includes a hopper 1, a guide chute 5, an impact chute 8, an impact sensor 7, a microwave flow meter unit 6, and an electronic instrument 4. Specifically, the hopper 1 is provided with an inlet 101 and an outlet 102; the guide chute 5 is inclinedly connected to the hopper 1, with one end connected to the outlet 102 and the other end provided with a discharge port 501; the impact chute 8 is spaced apart and obliquely below the discharge port 501, and located on the inclined extension line of the guide chute 5; the impact sensor 7 is connected to the impact chute 8, and the impact sensor 7 is adapted to monitor the flow of material sliding from the guide chute 5 to the impact chute 8. The flow rate of the material on the guide chute 5 is measured in real time. The microwave flow meter unit 6 is located above the discharge port 501 of the guide chute 5 and between the guide chute 5 and the impact chute 8. The microwave flow meter unit 6 is suitable for dynamically measuring the velocity of the material rushing from the guide chute 5 to the impact chute 8. The electronic instrument 4 is equipped with a data processing module that is electrically connected to the impact sensor 7 and the microwave flow meter unit 6. The data processing module is suitable for comparing the values ​​of the impact sensor 7 and the microwave flow meter unit 6 in real time, and for detecting and calibrating the value of the impact sensor 7 in real time through the value of the microwave flow meter unit 6.

[0027] This dynamic metering device uses a punch plate to measure the mass flow rate of material sliding from the guide chute 5 to the punch chute 8 in real time via a force sensor 7. This allows for direct measurement of the material's mass flow rate. In conjunction with a microwave flow meter unit 6, the device measures the velocity of the material sliding out of the guide chute 5 in real time. The absolute velocity value is calculated by the data processing module and used as a stable reference for the force sensor 7. Because the microwave flow meter unit 6 is a non-contact measurement method, it maintains long-term measurement accuracy and stability. When the force sensor 7 connected to the punch chute 8 experiences baseline drift due to zero-point drift, mechanical loosening, or material adhesion, the microwave flow meter unit 6 can detect the error. The data processing module can then dynamically calibrate the force sensor 7 online based on the erroneous measurement value, correcting it in real time and ensuring the long-term accuracy and stability of the metering device.

[0028] In this embodiment, the data processing module has the following execution steps: S1: Receives the raw force signal F(t) measured by the impact sensor 7 and the velocity signal v(t) measured by the microwave flow meter unit 6; S2: Based on the momentum theorem, the instantaneous flow rate is calculated by the impulse sensor 7: q0=αkF(t), where k is the initial calibration coefficient and α is the direction coefficient; S3: Use the velocity signal v(t) measured by microwave flowmeter unit 6 as the reference velocity value; S4: Real-time comparison and adaptive calibration. The data processing module uses microwave velocity v(t) as a reference to continuously monitor the rationality of q0 calculation. When an error is detected between the theoretical force of the impact sensor 7 and the actual measured force, the calculation model is corrected in real time for adaptive calibration. S5: Output the final instantaneous flow rate q0 and cumulative flow rate Q.

[0029] In step S4, when the force sensor of the punching unit is detected to have a baseline drift ΔF due to zero drift, mechanical loosening, or material adhesion through real-time comparison, the dynamic calibration algorithm is activated to correct the calculation model in real time for adaptive calibration.

[0030] Specifically, in step S4, the absolute velocity value measured by the microwave velocimeter is used as a stable reference. Based on the Doppler principle, the mass can be calculated by combining the recorded number and state of the falling particles. According to the momentum theorem, let α be the direction coefficient and t be the action time, then Fαt=mv, and the theoretical value of the force on the impact sensor 7 is derived as F=mv(t) / αt.

[0031] Specifically, in step S4, the error between the theoretical and actual measured forces is checked in real time. When the error exceeds 1%, the k coefficient of the force sensor 7 calculation formula is corrected in real time.

[0032] In this embodiment, a closed housing 9 is also included, and the discharge port 501 of the impact sensor 7, electronic instrument 4, impact chute 8, and guide chute 5 are all fixed inside the closed housing 9. This arrangement, by fixing the impact sensor 7 and electronic instrument 4 inside the closed housing 9 and using the closed housing 9 to provide support and fixation, improves the operational stability of the electronic instrument 4 and the impact chute 8, ensuring measurement stability. Specifically, the impact sensor 7 is located on the side of the impact chute 8 away from the guide chute 5, and the impact chute 8 is fixedly connected to the impact sensor 7.

[0033] In this embodiment, the microwave flow meter unit 6, the impact sensor 7, and the electronic instrument 4 are each individually covered with a sealed housing. This design prevents the microwave flow meter unit 6, the impact sensor 7, and the electronic instrument 4 from being damaged by vibrations generated by material impact.

[0034] In this embodiment, the impact sensor 7 and the electronic instrument 4 are electrically connected via a cable. Specifically, the cable is a flame-retardant cable.

[0035] In this embodiment, the feed inlet 101 is located at the top of the hopper 1, and the discharge outlet 102 is located at the bottom of the hopper 1. The guide chute 5 is fixedly connected at an angle of 30 degrees between the hopper 1 and the enclosed box 9.

[0036] In this embodiment, a manual gate valve 2 is provided at the discharge port 102 of the silo 1, and an electric flow valve 3 is provided between the manual gate valve 2 and the guide chute 5. Specifically, the electric flow valve 3 is electrically connected to the data processing module. This arrangement facilitates the calculation of the initial flow value and the theoretical flow value by the data processing module based on the electric flow valve 3 and the impact sensor 7.

[0037] In summary, this dynamic metering device uses a force sensor 7 to measure the mass flow rate of material sliding from the guide chute 5 onto the force chute 8 in real time, directly measuring the mass flow rate. Combined with a microwave flow meter unit 6, it measures the velocity of the material sliding out of the guide chute 5 in real time. The absolute velocity value is calculated by the data processing module and used as a stable reference for the force sensor 7. Since the microwave flow meter unit 6 is a non-contact measurement method, it maintains long-term measurement accuracy and stability. When the force sensor 7 connected to the force chute 8 experiences baseline drift due to zero-point drift, mechanical loosening, or material adhesion, the microwave flow meter unit 6 can detect the error. The data processing module can then dynamically calibrate the force sensor 7 online based on the erroneous measurement value, correcting it in real time and ensuring the long-term accuracy and stability of the metering device.

[0038] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A punch-plate type dynamic metering device, characterized in that, include: The hopper (1) is equipped with a feed inlet (101) and a discharge outlet (102); A guide chute (5) is inclined and connected to the hopper (1), with one end connected to the discharge port (102) and the other end provided with a discharge port (501); The impact chute (8) is spaced apart and obliquely below the discharge port (501), and is located on the inclined extension line of the guide chute (5); An impact sensor (7) is connected to the impact chute (8). The impact sensor (7) is adapted to measure in real time the flow rate of the material mass sliding from the guide chute (5) onto the impact chute (8). The microwave flow meter unit (6) is located above the discharge port (501) of the guide chute (5) and between the guide chute (5) and the impact chute (8). The microwave flow meter unit (6) is adapted to dynamically measure the velocity of the material rushing from the guide chute (5) to the impact chute (8). An electronic instrument (4) is provided with a data processing module electrically connected to the impact sensor (7) and the microwave flow meter unit (6). The data processing module is adapted to compare the values ​​of the impact sensor (7) and the microwave flow meter unit (6) in real time, and to detect and calibrate the value of the impact sensor (7) in real time by means of the value of the microwave flow meter unit (6).

2. The punch plate type dynamic metering device according to claim 1, characterized in that, The data processing module has the following execution steps: S1: Receive the original force signal F(t) measured by the impact sensor (7) and the velocity signal v(t) measured by the microwave flow meter unit (6); S2: Based on the momentum theorem, the instantaneous flow rate is calculated by the impulse sensor (7): q0=αkF(t), where k is the initial calibration coefficient and α is the direction coefficient; S3: Use the velocity signal v(t) measured by the microwave flowmeter unit (6) as the reference velocity value; S4: Real-time comparison and adaptive calibration. The data processing module uses microwave speed v(t) as a reference to continuously monitor the rationality of q0 calculation. When an error is detected between the theoretical force of the impact sensor (7) and the actual measured force, the calculation model is corrected in real time for adaptive calibration. S5: Output the final instantaneous flow rate q0 and cumulative flow rate Q.

3. The punch plate type dynamic metering device according to claim 2, characterized in that, In step S4, when the force sensor of the punching unit is detected to have a baseline drift ΔF due to zero drift, mechanical loosening, or material adhesion through real-time comparison, the dynamic calibration algorithm is activated to correct the calculation model in real time for adaptive calibration.

4. The punch plate type dynamic metering device according to claim 3, characterized in that, In step S4, the absolute velocity value measured by the microwave velocimeter is used as a stable reference. Based on the Doppler principle, the mass can be calculated by combining the recorded number and state of the falling particles. According to the momentum theorem, let α be the direction coefficient and t be the action time, then Fαt=mv. The theoretical value of the force on the impact sensor (7) is derived as F=mv(t) / αt.

5. The punch plate type dynamic metering device according to claim 4, characterized in that, In step S4, the error between the theoretical and actual measured forces is checked in real time. When the error exceeds 1%, the k coefficient of the force sensor (7) calculation formula is corrected in real time.

6. The punching plate type dynamic metering device according to claim 1, characterized in that, It also includes a closed box (9), and the discharge ports (501) of the impact sensor (7), the electronic instrument (4), the impact chute (8), and the guide chute (5) are all fixed inside the closed box (9).

7. The punch plate type dynamic metering device according to claim 1, characterized in that, The discharge port (102) of the silo (1) is equipped with a manual gate valve (2), and an electric flow valve (3) is provided between the manual gate valve (2) and the guide chute (5).

8. The punch plate type dynamic metering device according to claim 1, characterized in that, The microwave flow meter unit (6), the impact sensor (7), and the electronic instrument (4) are each individually covered with a sealed housing.

9. The punch plate type dynamic metering device according to claim 1, characterized in that, The impact sensor (7) is electrically connected to the electronic instrument (4) via a cable.

10. The punch plate type dynamic metering device according to claim 9, characterized in that, The cable is a flame-retardant cable.

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