Grain flow monitoring device and measurement method

Abstract

The present invention relates to the technical field of grain flow monitoring, and provides a grain flow monitoring device and a measuring method. The grain flow monitoring device comprises: a shell, a weighing sensor and a measuring support plate; a flow channel for grain flow is formed in the shell; the flow channel has a buffer section and a measuring section that are interconnected, the measuring section is inclined relative to the horizontal direction, the inlet of the buffer section is used to communicate with the discharge port of the elevator, and the inlet axis of the buffer section is parallel to the axis of the discharge port of the elevator; the first end of the weighing sensor is fixedly connected to the bottom surface of the buffer section, and the second end of the weighing sensor is fixedly connected to the bottom surface of the measuring support plate; the bottom surface of the measuring section is provided with a notch, the measuring support plate is arranged at the notch, and the top surface of the measuring support plate is coplanar with the bottom surface of the buffer section. The present invention reduces the flow rate of the grain through the buffer section and then smoothly enters the measuring section, reduces the interference of unstable factors such as splashing and bumping, and improves the accuracy and reliability of the measurement.

Description

Technical Field

[0001] The present invention relates to the technical field of grain flow monitoring, and in particular to a grain flow monitoring device and a measuring method. Background Art

[0002] In the process of scientific management and optimization of agricultural production, accurate acquisition of spatial distribution information of crop yield plays a vital role. This information not only provides data support for accurate assessment of regional agricultural production conditions, but also serves as an important basis for optimizing agricultural resource allocation and rationally adjusting crop planting structure. In order to achieve this goal, many technical means have emerged. Among them, real-time monitoring of grain flow on harvesters has become a direct and effective way to obtain crop yield information.

[0003] Grain flow monitoring methods are mainly divided into two categories based on mass flow and volume flow according to their different monitoring principles. Compared with the monitoring method based on volume flow, the monitoring method based on mass flow has shown superior performance in agricultural practice with its higher stability and accuracy. The monitoring method based on mass flow is further subdivided into weighing type, impact type and other monitoring forms using advanced technologies (such as gamma rays, X-rays, ultrasound, etc.).

[0004] The impact monitoring method calculates the mass flow rate based on the dynamic changes before and after the grain collides with the impact plate. Although this method has certain applicability in some scenarios, its measurement accuracy is easily affected by various factors such as the sensor installation angle, elevator speed, grain moisture content, and harvester vibration. In addition, when the grain flow rate is large, the relationship between the grain mass flow rate and the impact force presents a nonlinear characteristic, which further limits its application scope and accuracy. The weighing monitoring method directly determines the mass flow rate of the grain by measuring the gravity generated when the grain flows through the measuring plate. Its principle is simple and direct, and the measurement results are reliable.

[0005] Traditional grain flow monitoring methods usually install weighing sensors at the bottom or side of the grain bin to indirectly measure grain flow by weighing the entire grain bin. However, this method is not only easily affected by the bumps of the machine, resulting in unstable measurement results, but also requires the structure of the harvester to be independent of the grain bin, which increases the complexity of the device and reduces the portability and flexibility of the system. It can usually only be used as a front-end device. Summary of the invention

[0006] The invention provides a grain flow monitoring device and a measuring method, which are used to solve the problem that the device for measuring grain flow using a weighing sensor in the prior art has a complex structure and is easily affected by the bumping of machinery, thus affecting the measurement result.

[0007] The present invention provides a grain flow monitoring device, comprising: a shell, a weighing sensor and a measuring support plate; a flow channel for grain flow is formed in the shell; the flow channel has a buffer section and a measuring section which are connected to each other, the measuring section is inclined relative to the horizontal direction, the inlet of the buffer section is used to communicate with the discharge port of an elevator, and the inlet axis of the buffer section is parallel to the axis of the discharge port of the elevator; the first end of the weighing sensor is fixedly connected to the bottom surface of the buffer section, and the second end of the weighing sensor is fixedly connected to the bottom surface of the measuring support plate; the bottom surface of the measuring section is provided with a notch, the measuring support plate is arranged at the notch, and the top surface of the measuring support plate is coplanar with the bottom surface of the buffer section.

[0008] According to a grain flow monitoring device provided by the present invention, the measuring support plate includes a bottom plate, a first side plate and a second side plate, the first side plate and the second side plate are respectively arranged on opposite sides of the bottom plate, and the inner wall surface of the first side plate and the inner wall surface of the second side plate are respectively matched with the outer wall surface corresponding to the measuring section.

[0009] According to a grain flow monitoring device provided by the present invention, the buffer section includes a first buffer section, a direct current section, and a second buffer section which are connected in sequence, the direct current section is perpendicular to the horizontal direction, and the second buffer section is connected to the measuring section; the first buffer section and the second buffer section are both arc-shaped structures, the first buffer section has a first center, the second buffer section has a second center, and the first center and the second center are respectively arranged on both sides of the direct current section.

[0010] According to a grain flow monitoring device provided by the present invention, the buffer section further comprises a flow stabilizing section, the flow stabilizing section is arranged between the second buffer section and the measuring section, and the axis of the flow stabilizing section is collinear with the axis of the measuring section.

[0011] A grain flow monitoring device provided according to the present invention further includes a controller, and the weighing sensor is electrically connected to the controller.

[0012] A grain flow monitoring device provided according to the present invention further includes a display, which is communicatively connected with the controller.

[0013] According to a grain flow monitoring device provided by the present invention, the inner wall surface of the flow channel is provided with a coating.

[0014] According to a grain flow monitoring device provided by the present invention, the weighing sensor includes a strain gauge weighing sensor.

[0015] The present invention also provides a grain flow measurement method, based on any one of the grain flow monitoring devices described above, comprising: determining a second grain mass m2 when the measuring support plate is in an installed state based on a first grain mass m1 obtained by a weighing sensor, ; Obtain the time t taken by the grain to flow through the measuring pallet, the average speed v of the grain, and the length of the grain flowing through the measuring pallet l , determine the grain mass flow rate q1, the specific formula is as follows: ; where θ is the angle between the measuring support plate in the installed state and the horizontal state; based on the grain flow mass flow q1, the number of times the unit grain volume is repeatedly measured at the average speed K and the sample size N, the corrected grain mass flow is determined, and the specific formula is as follows: .

[0016] According to a method for measuring grain flow provided by the present invention, the calculation formula for the number of times K that a unit grain amount is repeatedly measured at an average speed is as follows: ; The calculation formula for sample size N is: , ≤ is the initial sampling frequency, is the target frequency.

[0017] The grain flow monitoring device and measurement method provided by the present invention ensure that all grains flowing through the device are detected by connecting the buffer section with the discharge port of the elevator; the buffer section reduces the flow rate of the grain and then smoothly enters the measuring section, reducing the interference of unstable factors such as splashing and bumping, thereby improving the accuracy and reliability of the measurement. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 It is one of the structural schematic diagrams of the grain flow monitoring device provided by the present invention; Figure 2 This is the second structural schematic diagram of the grain flow monitoring device provided by the present invention; Figure 3 It is a structural schematic diagram of the housing provided by the present invention; Figure 4 It is a module schematic diagram of the grain flow monitoring device provided by the present invention; Reference numerals: 10. Shell; 11. Buffer section; 111. First buffer section; 112. DC section; 113. Second buffer section; 114. Flow stabilization section; 12. Measuring section; 121. Notch; 20. Weighing sensor; 30. First mounting plate; 40. Second mounting plate; 50. Measuring support plate; 60. Controller; 70. Display. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] In the description of the embodiments of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0022] In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present invention.

[0023] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0024] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0025] The disclosure below provides many different embodiments or examples to realize different structures of the present invention. In order to simplify the disclosure of the present invention, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present invention. In addition, the present invention can repeat reference numbers and / or letters in different examples. This repetition is for the purpose of simplicity and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the examples of various specific processes and materials provided by the present invention, but those of ordinary skill in the art can be aware of the applicability of other processes and / or the use of other materials.

[0026] Combine the following Figure 1-Figure 4 The grain flow monitoring device and measurement method of the present invention are described.

[0027] The grain flow monitoring device provided in the embodiment of the present invention is installed at the discharge port of the elevator. The device is easy to install and can monitor the mass flow of grain in real time and accurately during grain transportation, thereby providing reliable support for automated control, data collection and production optimization.

[0028] The grain flow monitoring device includes a housing 10, a weighing sensor 20 and a measuring support plate 50. A flow channel for grain flow is formed in the housing 10. The flow channel includes a buffer section 11 and a measuring section 12. The buffer section 11 is connected to the measuring section 12. The buffer section 11 is an arc structure. The measuring section 12 is inclined relative to the horizontal direction, which helps the grain to flow stably during measurement.

[0029] The buffer section 11 is located at the inlet of the flow channel and is connected to the discharge port of the elevator. The axis of the inlet of the buffer section 11 is parallel to the axis of the discharge port of the elevator, such as being collinear, which helps to guide the grain into the flow channel and avoid measurement errors caused by excessive flow velocity or unstable flow direction. The buffer section 11 can be an arc-shaped structure, which can effectively reduce the impact force of the grain, reduce the flow velocity, and ensure that the grain flows evenly into the measuring section 12. The buffer section 11 can be connected to the discharge port of the elevator by fasteners to simplify installation, and the grain flows out of the discharge port of the elevator at a certain speed, which can reduce the external power demand.

[0030] Measuring section 12 is a key part of grain flow monitoring. It is tilted relative to the horizontal plane so that the grain can produce an appropriate gravity effect when passing through, further stabilizing its flow rate. Through measuring section 12, the quality of grain flowing through this section can be accurately detected, providing high-precision mass flow data.

[0031] like Figure 1 and Figure 2As shown, the first end of the weighing sensor 20 is fixedly connected to the bottom surface of the buffer section 11 through the first mounting plate 30, and the second end of the weighing sensor 20 is fixedly connected to the bottom surface of the measuring support plate 50 through the second mounting plate 40. The weighing sensor 20 is used to obtain the mass of the grain. The bottom surface of the measuring section 12 is provided with a notch 121. Figure 3 As shown, the entire bottom surface of the measuring section 12 is a notch 121, and the measuring support plate 50 is located at the notch 121. The top surface of the measuring support plate 50 is coplanar with the bottom surface of the buffer section 11, so that the grain can pass smoothly on the measuring support plate for measurement, while also avoiding grain omission.

[0032] The measuring support plate 50 forms a cantilever connection structure with the housing 10 through the weighing sensor 20. When the grain flows through the measuring support plate 50, the measuring support plate 50 changes perpendicular to the measuring support plate 50 under the action of gravity, and the weighing sensor 20 can accurately calculate the mass of the grain flowing through the measuring support plate 50. The weighing sensor 20 can be a strain type weighing sensor 20. The mass m1 of the grain flowing through the area is calculated by measuring the deformation of the support plate 50. The high sensitivity and high precision of the strain type sensor can effectively capture tiny mass changes and ensure the reliability of the data.

[0033] Furthermore, according to the angle between the measuring support plate 50 and the horizontal direction, combined with the mechanical principles (such as the law of force decomposition), Figure 2 As shown, the actual mass flow rate (m2) of the grain can be calculated, that is, by measuring the mass of the grain on the support plate 50, so as to obtain more accurate grain flow data.

[0034] The grain flow monitoring device provided in the embodiment of the present invention ensures that all grains flowing through the device are detected by connecting the buffer section with the discharge port of the elevator; the buffer section reduces the flow rate of the grain and then smoothly enters the measuring section 12, reducing the interference of unstable factors such as splashing and bumping, thereby improving the accuracy and reliability of the measurement.

[0035] In one embodiment, the measuring support plate 50 includes a bottom plate, a first side plate and a second side plate, and the first side plate, the second side plate and the bottom plate are surrounded to form a U-shaped structure. The inner wall surface of the first side plate is in clearance with the outer wall surface of the measuring section 12, and the inner wall surface of the second side plate is in clearance with the outer wall surface corresponding to the measuring section 12. Under the action of gravity, the first side plate and the second side plate can change slightly in a direction perpendicular to the bottom plate.

[0036] Furthermore, a relief opening is provided at the bottom of the outer wall surface corresponding to the measuring section 12 and the first side plate and the second side plate, and the relief opening is connected to the notch 121 to prevent grains from being entrained or retained between the first side plate and the corresponding outer wall surface or between the second side plate and the corresponding outer wall surface, thereby ensuring that the grains can flow smoothly through the bottom plate area without blockage or accumulation during the flow process. The size and position of the relief opening can be appropriately adjusted according to the different types of grains and flow ranges, so as to adapt to different working environments and requirements.

[0037] The buffer section in the embodiment of the present invention includes a first buffer section 111, a second buffer section 113 and a direct current section 112. The two ends of the direct current section 112 are respectively connected to the first buffer section 111 and the second buffer section 113. The inlet of the first buffer section 111 is the inlet of the flow channel, which is connected to the discharge port of the elevator. The second buffer section 113 is connected to the measuring section 12.

[0038] In one embodiment, the first buffer section 111 and the second buffer section 113 are both arc-shaped structures, and the axis of the DC section 112 is perpendicular to the horizontal direction. The first buffer section 111 has a first center, and the second buffer section 113 has a second center. The first center and the second center are respectively arranged on both sides of the DC section 112. Figure 1 and Figure 2 shown.

[0039] The grains flowing out of the discharge port of the elevator do not need external power input to the buffer section 11, and sequentially pass through the first buffer section 111, the direct flow section 112, and the second buffer section 113, and then enter the measuring section 12 for measurement. In this process, the design of the buffer section 11 plays a vital role in controlling the grain flow rate, suppressing splashing, and ensuring smooth flow.

[0040] Specifically, the first buffer section 111 is located downstream of the discharge port of the elevator, and is mainly used to guide the grain to flow in and slow down. In this section, the grain contacts the outer wall surface of the first buffer section 111, and its speed is slowed down by friction, which suppresses splashing and ensures that the grain does not enter the direct flow section 112 too quickly. In addition, the arc design of the first buffer section 111 can optimize the flow path of the grain, reduce flow resistance, and promote smooth flow. The function of the direct flow section 112 is to guide the grain passing through the first buffer section 111 to flow to the second buffer section 113, and turbulence or irregular flow will not be generated due to turning or sudden change of flow direction, so as to ensure smooth transition of the grain. The second buffer section 113 is mainly used to further reduce the flow rate of the grain and guide it stably to the measuring section 12. In this section, the grain contacts the inner wall surface of the second buffer section 113, and the movement speed is reduced by friction with the inner wall surface, so as to prevent measurement errors caused by excessive flow speed or splashing. The design of this section takes into account the movement characteristics of the grain in particular, and its size and curvature match the speed and flow characteristics of the grain to optimize its deceleration effect.

[0041] In order to further ensure that the grains flow into the measuring section 12 at a stable speed, a steady flow section 114 is further added in the embodiment of the present invention. The steady flow section 114 is located between the second buffer section 113 and the measuring section 12, and its axis is collinear with the axis of the measuring section 12, and the bottom surface of the steady flow section 114 is coplanar with the bottom surface of the measuring section 12 (i.e., the top surface of the measuring support plate 50). The function of the steady flow section 114 is to extend the distance between the falling point of the grains and the measuring support plate 50 so that the grains can flow into the measuring support plate 50 at a stable and uniform speed, thereby preventing the grains from directly impacting the top surface of the measuring support plate 50 due to unstable speed, thereby affecting the measurement accuracy. The steady flow section 114 increases the free fall time of the grains, so that the grains after passing through the buffer section can gradually slow down and smoothly transition to the measuring section 12 before falling into the measuring section 12, further improving the accuracy and reliability of the device in actual work.

[0042] The present invention can effectively control the flow velocity and stability of grains when flowing through the measuring section 12 by setting the buffer section 11, avoid measurement errors caused by splashing or excessive speed, improve the reliability and measurement accuracy of the grain flow measurement system, and provide higher applicability for applications in different working environments.

[0043] The grain flow monitoring device provided in the embodiment of the present invention also includes a controller 60, and the weighing sensor 20 is electrically connected to the controller 60. The controller 60 receives the quality information obtained by the weighing sensor 20 and converts it into a digital signal, and determines the grain mass flow based on the grain mass flow monitoring model inside the controller 60.

[0044] like Figure 4 As shown, the grain flow monitoring device further includes a display 70, which is in communication with the controller 60. The controller 60 can send the grain mass flow determined according to the grain mass flow monitoring model to the display 70 for display, and the user can also view and interact through the display 70. The display 70 includes a touch display 70.

[0045] The controller 60 includes a main control chip, a power supply unit, a storage unit, a filter unit and a communication unit. The power supply unit has voltage stabilization and circuit protection functions. The controller 60 is connected to the weighing sensor 20 and the display 70 respectively. Its function is to collect the signal of the weighing sensor 20, amplify the collected strain signal, and A / D convert it. The filtered information is calculated into the grain mass flow through the grain flow monitoring model, and transmitted to the display 70 through the CAN bus interface of the communication unit.

[0046] The inner wall surface of the flow channel in the embodiment of the present invention is provided with a coating to suppress grain splashing and ensure stable grain flow. In one embodiment, the inner wall surface of the flow channel is provided with a coating formed by spraying a rubber material.

[0047] Based on the grain flow monitoring device in any of the above embodiments, the embodiment of the present invention further provides a grain flow measurement method, comprising: step 100, based on a first grain mass m1 obtained by a weighing sensor, determining a second grain mass m2 when the measuring support plate is in an installed state, Step 200, obtaining the time t taken by the grain to flow through the measuring support plate, the average speed v of the grain, and the length of the grain to flow through the measuring support plate l , determine the grain mass flow rate q1, the specific formula is as follows: ; Wherein θ is the angle between the measuring plate in the installed state and the horizontal state. The average speed v of the grain can be derived based on the structural dimensions of the shell and the rotation speed of the auger in the elevator, which will not be described in detail here.

[0048] Step 300, based on the grain flow mass flow q1, the number of times K that the unit grain amount is repeatedly measured at the average speed, and the sample size N, determine the corrected grain mass flow rate, and the specific formula is as follows: .

[0049] Assuming that there is no relative movement between the unit quantities of grain, the initial sampling frequency of the weighing sensor is set to f 1 (HZ), the sampling time interval is 1 / f 1. In the actual measurement process, the measurement is discrete. It is assumed that the speed of a unit amount of grain flowing through a very small distance of the measuring plate is uniform, and the average speed of the grain on the measuring plate is taken as v , the length of the grain flowing through the measuring support plate is l The time required for the grain to flow through the measuring support is t , t To ensure smooth measurement, the time required for a unit amount of grain to flow through the measuring support plate is greater than the sampling time of the grain, that is, The measuring support plate is installed on the bottom surface of the measuring section at an angle relative to the horizontal direction, and the angle between the measuring support plate in the installed state and the horizontal state is θ. The first grain mass obtained by the weighing sensor is m 1. The load cell is related to the pressure it is subjected to. Based on the arrangement and the principle of force decomposition, such as Figure 2 As shown, determine the second grain mass m 2, = ,Right now = By time interval t Sampling to determine grain mass flow quality q 1, The average speed is used to calculate the grain mass flow rate. Under the initial sampling frequency of the weighing sensor, the unit amount of grain will be repeatedly calculated. Therefore, the present invention introduces the number of repeated calculations K. is the target frequency, f 2≤ f 1, the sample size N is The directions from the inflow to the outflow of a unit amount of grain are 1, 2, 3… i … N , the number of times a unit amount of grain flows through the measuring plate is repeatedly counted n , N ≥ n , When a unit amount of grain flows through the measuring plate, the i-th unit amount of grain is repeatedly measured n-(i-1) times, and the i+1-th unit amount of grain is repeatedly measured ni times. The number of repeated calculations K at the average speed is .

[0050] Furthermore, based on the grain flow mass flow q 1. The number of times K that the unit grain amount is repeatedly measured at the average speed and the sample size N are used to determine the corrected grain mass flow rate, as follows: .

[0051] The embodiment of the present invention calculates the grain mass flow rate by regarding the average speed of a unit amount of grain flowing through a measuring support plate within a very small distance as the instantaneous speed, and introduces repeated measurements to eliminate the error caused by replacing the instantaneous speed with the average speed, thereby calculating the corrected grain mass flow rate.

[0052] Finally, 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 aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A grain flow monitoring device, characterized in that: include: A housing, a weighing sensor and a measuring support plate; a flow channel for grain flow is formed in the housing; The flow channel has a buffer section and a measuring section that are connected to each other, the measuring section is inclined relative to the horizontal direction, the inlet of the buffer section is used to communicate with the discharge port of the elevator, and the inlet axis of the buffer section is parallel to the axis of the discharge port of the elevator; The first end of the weighing sensor is fixedly connected to the bottom surface of the buffer section, and the second end of the weighing sensor is fixedly connected to the bottom surface of the measuring support plate; a notch is provided on the bottom surface of the measuring section, and the measuring support plate is arranged at the notch, and the top surface of the measuring support plate is coplanar with the bottom surface of the buffer section.

2. The grain flow monitoring device according to claim 1, characterized in that: The measuring support plate includes a bottom plate, a first side plate and a second side plate, wherein the first side plate and the second side plate are respectively arranged on opposite sides of the bottom plate, and the inner wall surface of the first side plate and the inner wall surface of the second side plate are respectively matched with the outer wall surface corresponding to the measuring section.

3. The grain flow monitoring device according to claim 2, characterized in that: The buffer section comprises a first buffer section, a DC section and a second buffer section which are connected in sequence, the DC section is perpendicular to the horizontal direction, and the second buffer section is connected to the measuring section; The first buffer section and the second buffer section are both arc-shaped structures. The first buffer section has a first center, and the second buffer section has a second center. The first center and the second center are respectively arranged on both sides of the direct current section.

4. The grain flow monitoring device according to claim 3, characterized in that: The buffer section further includes a flow stabilizing section, which is arranged between the second buffer section and the measuring section, and the axis of the flow stabilizing section is collinear with the axis of the measuring section.

5. The grain flow monitoring device according to claim 1, characterized in that: A controller is also included, and the weighing sensor is electrically connected to the controller.

6. The grain flow monitoring device according to claim 5, characterized in that: A display is also included, and the display is communicatively connected to the controller.

7. The grain flow monitoring device according to claim 1, characterized in that: The inner wall surface of the flow channel is provided with a coating.

8. The grain flow monitoring device according to claim 1, characterized in that: The weighing sensor comprises a strain gauge weighing sensor.

9. A method for measuring grain flow rate, based on the grain flow rate monitoring device according to any one of claims 1 to 7, characterized in that: include: Based on the first grain mass m1 obtained by the weighing sensor, the second grain mass m2 when the measuring support plate is installed is determined, ; Obtain the time t taken by the grain to flow through the measuring pallet, the average speed v of the grain, and the length of the grain flowing through the measuring pallet l , determine the grain mass flow rate q1, the specific formula is as follows: ； Where θ is the angle between the measuring support plate in the installed state and the horizontal state; based on the grain flow mass flow q1, the number of times the unit grain amount is repeatedly measured at the average speed K and the sample size N, the corrected grain mass flow is determined. The specific formula is as follows: 。 10. The method for measuring grain flow according to claim 9, characterized in that: The calculation formula for the number of times K that the unit grain amount is repeatedly measured at the average speed is as follows: ； The calculation formula for sample size N is: , ≤ is the initial sampling frequency, is the target frequency.

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