Screw conveyor combine harvester grain mass flow monitoring system and apparatus

Abstract

The present application relates to the technical field of wisdom agriculture, and provides a spiral conveying type combined harvester grain mass flow monitoring system and device, the grain mass flow measuring device is arranged at the discharge port of the spiral conveyor of the combined harvester, and it comprises a shell, a weighing sensor in the shell and a measuring support plate, the measuring support plate, the weighing sensor and the shell form a cantilever structure, when the grain mass flow is measured, the grain flows to the measuring support plate of the measuring device through the discharge port, the weighing sensor senses the weight of the grain on the measuring support plate in real time to generate a corresponding strain signal; the data collector in the monitoring system collects the strain signal in real time, and forms a corresponding voltage digital signal after processing the strain signal, which is transmitted to the signal processing unit; the signal processing unit converts the voltage digital signal into grain mass information and transmits it to the monitoring unit; the monitoring unit calculates and generates grain mass flow information according to the grain mass information, and realizes real-time monitoring of the grain mass flow.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of smart agriculture technology, and in particular to a spiral conveying type grain quality flow monitoring system and device for combine harvester. BACKGROUND

[0002] With the rapid development of modern agricultural technology, smart agriculture has become an important means to improve agricultural production efficiency, optimize resource allocation, and achieve precision agricultural management. Accurate acquisition of grain flow information is the basis for establishing crop yield spatial distribution maps and making management decisions. Grain flow information acquisition is an important part of intelligent sensing technology in-machine perception, and grain flow information is obtained by a grain flow monitoring system mounted on a combine harvester.

[0003] At present, most combine harvesters on the market are not equipped with grain flow monitoring systems, which makes it impossible to obtain accurate grain flow data in real time during the harvesting process. A few harvesters equipped with grain flow monitoring systems use traditional grain tank whole weighing type monitoring devices. Although this type of device can reflect the changes in grain flow to some extent, its structure is complex and is easily affected by the bumps during the operation of the machine, resulting in poor monitoring accuracy and stability, which makes it difficult to meet the demand for high-precision and high-stability monitoring data in precision agriculture. In addition, the traditional grain tank whole weighing type monitoring device requires significant modification of the combine harvester during installation, increasing the installation difficulty and cost, and occupying valuable grain storage space, affecting the overall performance and operating efficiency of the combine harvester. Therefore, this solution is not suitable for large-scale retrofitting of existing combine harvesters.

[0004] In order to overcome the above-mentioned shortcomings, researchers have attempted to monitor grain flow at the discharge port of the spiral auger and have proposed two technical solutions: weighing measurement and impact measurement. However, the weighing measurement type device has poor universality and requires significant modification of the machine structure during installation, and occupies a large amount of grain storage space, limiting its widespread application. Although the impact measurement type device can achieve real-time monitoring to some extent, when the grain flow is large, the non-linear relationship between grain flow and grain impact force and the interference of multiple factors on measurement accuracy make the measurement accuracy and reliability of this solution still need to be improved.

[0005] Therefore, it is necessary to provide a new technical solution to solve the above technical problems. SUMMARY

[0006] The present application aims to provide a spiral conveying type grain quality flow monitoring system and device for combine harvester with high accuracy, stability, reliability, strong universality and compact structure, which provides key technical support for grain quality flow monitoring of crops and technical basis for obtaining spatial distribution information of crop yield.

[0007] The present application provides a spiral conveying type combine harvester grain mass flow monitoring system, comprising a signal acquisition unit, a signal processing unit and a monitoring unit, the signal acquisition unit is in communication connection or electrical connection with the signal processing unit, the signal processing unit is in communication connection or electrical connection with the monitoring unit;

[0008] The signal acquisition unit comprises a grain mass flow measuring device and a data collector, the grain mass flow measuring device is arranged at the discharge port of the spiral conveyor of the combine harvester, and the grain mass flow measuring device comprises:

[0009] A shell having a hollow cavity passing through along the axial direction, one end of the shell is sleeved on the discharge port;

[0010] A load cell arranged in the hollow cavity, comprising an opposite load cell end and a fixed end, the fixed end of the load cell is fixed to the bottom of the hollow cavity;

[0011] A measuring plate arranged in the hollow cavity, the bottom of the measuring plate is fixed to the load cell end of the load cell;

[0012] Wherein, the measuring plate, the load cell and the shell form a cantilever structure; when monitoring the grain mass flow, the grain entering the grain mass flow measuring device through the discharge port flows to the measuring plate, the load cell generates a corresponding strain signal by sensing the weight of the grain on the measuring plate in real time, the data collector is used for collecting the strain signal in real time and processing the strain signal to form a corresponding voltage digital signal transmitted to the signal processing unit, the signal processing unit is used for converting the voltage digital signal into grain mass information and transmitting it to the monitoring unit, the monitoring unit calculates the grain mass flow information according to the grain mass information, so as to realize the real-time monitoring of the grain mass flow.

[0013] According to the spiral conveying type combine harvester grain mass flow monitoring system provided by the present application, the shell is cylindrical, the measuring plate is semicylindrical, and the axis of the measuring plate and the axis of the shell are parallel to the plane where the load cell end is located.

[0014] According to the spiral conveying type combine harvester grain mass flow monitoring system provided by the present application, the shell comprises a first shell and a second shell arranged opposite to each other, one end of the first shell and the second shell is rotatably connected through a rotating part, and the other end of the first shell and the second shell is locked or opened through a shell connecting piece.

[0015] According to the spiral conveying combined harvester grain mass flow monitoring system provided by the application, the grain mass flow measuring device further comprises a fixing plate and a fixing plate connecting piece, the fixing plate is arranged in the hollow cavity and located at one side close to the discharge port, and the fixing plate connecting piece is used to mount the fixing plate on the shell;

[0016] When the grain mass flow measuring device is connected with the discharge port, one end of the shell is sleeved on the discharge port, the distance between the fixing plate and the shell is adjusted by adjusting the fixing plate connecting piece, the fixing plate is abutted to the outer wall of the discharge port, and the grain mass flow measuring device is sleeved on the discharge port.

[0017] According to the spiral conveying combined harvester grain mass flow monitoring system provided by the application, the outer wall of the shell is provided with a receiving box, the data collector is placed in the receiving box, the data collector comprises an MCU processor, a strain signal input interface and a frequency signal input interface, the strain signal input interface is connected with the signal output interface of the load cell, and the frequency signal input interface is connected with a frequency debugging device.

[0018] The data collector is used for collecting the strain signal in real time according to the frequency set by the frequency debugging device, and the strain signal is amplified, A / D converted and filtered by the MCU processor to generate a corresponding voltage digital signal.

[0019] The application further provides a spiral conveying combined harvester grain mass flow measuring device, which is arranged at the discharge port position of a spiral conveyor of a combined harvester and comprises the following components.

[0020] A shell with a hollow cavity penetrating through in the axial direction, one end of the shell is sleeved on the discharge port of the spiral conveyor;

[0021] A load cell arranged in the hollow cavity and comprising a load end and a fixed end arranged oppositely, the fixed end of the load cell is fixed to the bottom of the hollow cavity;

[0022] A measuring plate arranged in the hollow cavity, the bottom of the measuring plate is fixed to the load end of the load cell;

[0023] The measurement plate, the load cell and the shell form a cantilever structure, when the grain quality flow measurement is carried out, the grain entering the grain quality flow measurement device through the discharge port flows to the measurement plate, the load cell generates a corresponding strain signal by sensing the weight of the grain on the measurement plate in real time, and the strain signal is used to generate grain quality information, and the grain quality information is used to calculate and generate grain quality flow information.

[0024] According to the spiral conveying type combine harvester grain quality flow measurement device provided by the application, the shell is cylindrical, the measurement plate is semicylindrical, and the axis of the measurement plate and the axis of the shell are parallel to the plane where the load end of the load cell is located.

[0025] According to the spiral conveying type combine harvester grain quality flow measurement device provided by the application, the shell comprises a first shell and a second shell arranged oppositely, one end of the first shell and the second shell is rotationally connected through a rotating part, and the other end of the first shell and the second shell is locked or opened through a shell connecting piece.

[0026] According to the spiral conveying type combine harvester grain quality flow measurement device provided by the application, the shell further comprises a fixing plate and a fixing plate connecting piece, the fixing plate is arranged in the hollow cavity and located on the side close to the discharge port, and is installed on the shell through the fixing plate connecting piece.

[0027] When the grain quality flow measurement device is connected with the discharge port, one end of the shell is sleeved on the discharge port, the distance between the fixing plate and the shell is adjusted through the fixing plate connecting piece, the fixing plate is abutted to the outer wall of the discharge port, and the grain quality flow measurement device is sleeved on the discharge port.

[0028] According to the spiral conveying type combine harvester grain quality flow measurement device provided by the application, the fixing plate is in an arc structure and is installed on the second shell, and the measurement device further comprises a plurality of installation positioning pieces, the plurality of installation positioning pieces are all arranged on the first shell and located on the end of the first shell close to the discharge port.

[0029] When the grain quality flow measurement device is connected with the discharge port, the depth of the plurality of installation positioning pieces inserted into the shell is adjusted, the plurality of installation positioning pieces are all abutted to the outer wall of the discharge port, and the grain quality flow measurement device is fixed with the discharge port.

[0030] The above technical scheme of the application has the following beneficial effects:

[0031] The grain mass flow monitoring system and device of the spiral conveying combined harvester according to the present application, by setting the grain mass flow measuring device as a hollow shell and the combination of the weighing sensor and the measuring plate accommodated in the shell, can directly install the measuring device on the discharge port of the spiral conveyor of the combined harvester, with simple and compact overall structure, convenient installation, and without the need to modify the structure of the existing combined harvester, and with strong versatility. The weighing sensor can directly and dynamically weigh the grain weight, without being limited by the load and the crop type, and the measuring plate, the weighing sensor and the shell form a cantilever structure, which can improve the measurement accuracy and stability. When monitoring the grain mass flow, the grain flowing into the grain mass flow measuring device through the discharge port of the spiral conveyor flows to the measuring plate, the weighing sensor below the measuring plate can sense the grain weight on the measuring plate in real time to generate a corresponding strain signal, the data collector can collect and process the strain signal to form a corresponding voltage digital signal and transmit it to the signal processing unit, the signal processing unit converts the voltage digital signal into grain quality information and transmits it to the monitoring unit, and the monitoring unit calculates the grain mass flow information according to the grain quality information, so as to realize real-time and accurate monitoring of the grain mass flow. BRIEF DESCRIPTION OF DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the present application or prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative effort.

[0033] Figure 1 The structural schematic diagram of the grain mass flow monitoring system of the spiral conveying combined harvester provided by the embodiment of the present application is shown in the figure.

[0034] Figure 2 The relative position diagram of the grain mass flow measuring device and the discharge port of the spiral conveyor provided by the embodiment of the present application is shown in the figure.

[0035] Figure 3 The front view of the grain mass flow measuring device provided by the embodiment of the present application is shown in the figure.

[0036] Figure 4 The left view of the grain mass flow measuring device shown in the figure. Figure 3

[0037] Reference signs:

[0038] ​1, agitator shaft; 2, spiral agitator; 3, grain mass flow measuring device; 4, discharge port; 5, rotating part; 6, mounting positioning piece; 7, first housing; 8, measuring support plate; 9, mounting fastener; 10, load cell; 11, U-shaped lining plate; 12, fixed plate connecting piece; 13, housing connecting piece; 14, fixed plate; 15, rubber rib plate; 16, second housing; 17, storage box; 100, signal acquisition unit; 200, signal processing unit; 300, monitoring unit. DETAILED DESCRIPTION

[0039] In order to make the objects, technical solutions and advantages of the present application clearer, the technical solutions in the present application will be described clearly and completely below with reference to the drawings in the present application. Obviously, the described embodiments are some embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

[0040] The following will be described in detail Figures 1-4 The spiral conveying type combine harvester grain mass flow monitoring system and measuring device provided by the present application will be described in detail.

[0041] As shown in Figure 1 , the spiral conveying type combine harvester grain mass flow monitoring system provided by the present application is applied to a spiral conveying type combine harvester, which comprises a signal acquisition unit 100, a signal processing unit 200 and a monitoring unit 300. The signal acquisition unit 100 is in communication connection or electrical connection with the signal processing unit 200, and the signal processing unit 200 is in communication connection or electrical connection with the monitoring unit 300.

[0042] As shown in Figure 1 and Figure 2 , the spiral conveyor of the combine harvester comprises an agitator shaft 1, a spiral agitator 2 and a discharge port 4. The spiral agitator 2 is fixed on the agitator shaft 1 in the form of spiral coil, and the agitator shaft 1 and the spiral agitator 2 penetrate through the discharge port 4 along the axial direction of the discharge port 4. The spiral agitator 2 carries the grain out of the discharge port 4 under the driving of the agitator shaft 1.

[0043] Among them, the signal acquisition unit 100 comprises a grain mass flow measuring device 3, which is arranged on the discharge port 4 of the spiral conveyor, for measuring the weight of the grain flowing out of the discharge port 4 in real time, and generating a corresponding strain signal according to the real-time measured weight of the grain.

[0044] Specifically as shown in Figure 3 and Figure 4As shown, the grain mass flow measuring device 3 comprises a shell (7 and 16), a load cell 10 and a measuring pallet 8, the shell has a hollow cavity through which the shell is penetrated along the axial direction, and one end of the shell is used to be sleeved on the discharge port. The load cell 10 is arranged in the hollow cavity of the shell, and the load cell 10 comprises an opposite load end and a fixed end, and the fixed end of the load cell 10 is fixed to the bottom of the hollow cavity through a mounting fastener 9 (such as a mounting screw). The measuring pallet 8 is arranged in the hollow cavity of the shell, and the bottom of the measuring pallet 8 is fixed to the load end of the load cell 10.

[0045] Among them, the measuring pallet 8, the load cell 10 and the shell form a cantilever structure. In the cantilever structure, the measuring pallet 8 serves as a platform for bearing and supporting the grain to be measured, and the measuring pallet 8 is located above the load cell 10 for directly bearing the grain to be measured. The load cell 10 adopts a cantilever beam design, which generates a corresponding strain signal by detecting the slight deformation of the cantilever beam under the gravity of the grain, so as to measure the weight of the grain. The shell serves as an external structure for protecting and supporting the load cell 10 and the measuring pallet 8, and the load cell 10 and the measuring pallet 8 are accommodated in the internal cavity, so that the overall structure is compact and the space occupation ratio is reduced.

[0046] In the cantilever structure, when the grain to be measured flows onto the measuring pallet 8, the weight of the grain to be measured is transmitted to the load cell 10 through the measuring pallet 8, and the cantilever beam inside the load cell 10 will produce a slight bending deformation under the action of external force. This deformation is detected by a strain gauge or similar element and converted into a strain signal output.

[0047] Further, the shell is cylindrical, the measuring pallet 8 is semicylindrical, and the axis of the measuring pallet 8 and the axis of the shell are parallel to the plane where the load end of the load cell 10 is located, so as to ensure the accuracy and stability of the measurement.

[0048] Further, the shell comprises a first shell 7 and a second shell 16 arranged opposite to each other, one end of the first shell 7 and the second shell 16 is rotatably connected through a rotating part 5, and the other end of the first shell 7 and the second shell 16 is locked or opened through a shell connecting piece 13. The outer wall of the shell is provided with a receiving box 17 for accommodating some electrical components of the monitoring system.

[0049] Among them, the rotating part 5 can be provided with one, two or more than two according to actual needs, which is not limited here. In an embodiment, the rotating part 5 can be a hinge, but is not limited to this.

[0050] In an embodiment, the shell connector 13 can be a screw and nut structure. After the screw and nut are disassembled, the first shell 7 and the second shell 16 can be opened, facilitating the installation of the grain mass flow measuring device on the discharge port. After the installation is completed, the screw and nut are locked, thereby locking and fixing the first shell 7 and the second shell 16.

[0051] Further, the grain mass flow measuring device further comprises a fixing plate 14 and a fixing plate connector 12. The fixing plate 14 is arranged in the hollow cavity of the shell and located on the side close to the discharge port. The fixing plate 14 is an arc-shaped structure and is installed on the second shell 16 through the fixing plate connector 12. The fixing plate connector 12 is also used to adjust the distance of the fixing plate 14 relative to the shell. When the grain mass flow measuring device is connected with the discharge port, one end of the shell is sleeved on the discharge port. By adjusting the fixing plate connector 12 to adjust the distance between the fixing plate 14 and the shell, the fixing plate 14 is abutted to the outer wall of the discharge port, so as to sleeve the grain mass flow measuring device on the discharge port.

[0052] Among them, the number of fixing plates 14 can be set according to actual conditions, for example, two fixing plates 14 are arranged along the axial direction of the shell, and each fixing plate 14 is installed on the second shell 16 through the fixing plate connector 12. In order to enhance the stability of the fixing plate 14, each fixing plate 14 can be fixed by two or more fixing plate connectors 12.

[0053] In an embodiment, the fixing plate connector 12 can be a screw, but is not limited thereto. During the installation of the grain mass flow measuring device, the screw is adjusted to tightly hold the discharge port between the fixing plate 14 and the inner wall of the first shell 7, thereby realizing the fixation of the grain mass flow measuring device.

[0054] Further, the measuring device further comprises a plurality of installation positioning members 6. The plurality of installation positioning members 6 are arranged on the first shell 7 and located on the end of the first shell 7 close to the discharge port. When the grain mass flow measuring device is connected with the discharge port, the depth of the plurality of installation positioning members 6 inserted into the shell can be adjusted, so that the plurality of installation positioning members 6 are abutted to the outer wall of the discharge port. In this way, on the basis of protecting the shell, the stability between the grain mass flow measuring device and the discharge port can be further improved.

[0055] In an embodiment, the measuring device further comprises a U-shaped lining plate 11. The U-shaped lining plate 11 is used to pad between the measuring supporting plate 8 and the installation surface of the weighing end of the weighing sensor 10, thereby playing a certain protection role.

[0056] In an embodiment, the measuring device further comprises a rubber rib plate 15. The rubber rib plate 15 is arranged between the fixing plate 14 and the inner wall of the second shell 16, thereby playing a certain protection and buffering role.

[0057] When the grain mass flow rate is measured, the grain flow entering the grain mass flow rate measuring device through the discharge port flows to the measuring plate 8, and the load cell 10 generates a corresponding strain signal by sensing the weight of the grain on the measuring plate 8 in real time, which is used to generate grain mass information, and the grain mass flow rate information can be calculated based on the grain mass information.

[0058] Further, as shown in Figure 1 The signal acquisition unit 100 further includes a data collector, which can be placed in the storage box of the measuring device. The data collector includes an MCU processor, a memory, a strain signal input interface, a frequency signal input interface, a first power management module, and a first communication module. The strain signal input interface is connected to the signal output interface of the load cell, and the frequency signal input interface is connected to the frequency debugging device. The data collector is used to collect the strain signal in real time according to the frequency set by the frequency debugging device, and amplify, A / D convert, and filter process the strain signal through the MCU processor to generate a corresponding voltage digital signal. The data collector transmits the preliminary processed data (voltage digital signal) to the signal processing unit 200 for further analysis and processing through the first communication module.

[0059] The signal processing unit 200 mainly includes a master control chip, a second power management module, a storage module, a filtering module, and a second communication module. The signal processing unit 200 is connected to the signal acquisition unit 100 in the front stage and connected to the monitoring unit 300 in the rear stage. The signal processing unit 200 amplifies, A / D converts, and filters the voltage digital signal to convert it into grain mass information, and transmits it to the monitoring unit 300 in the rear stage through the second communication module.

[0060] The monitoring unit 300 is composed of a display screen, a grain mass flow rate monitoring software, and a user interface, and the monitoring unit 300 communicates with the signal processing unit 200 through CAN bus. The grain mass flow rate monitoring software is used for grain mass flow rate calculation. The display screen is used for user interface display and man-machine interaction, and the user interface can realize real-time grain mass flow rate display in digital and image forms, and can also realize related parameter configuration, data storage, historical data management, and export.

[0061] The grain mass flow rate calculation method of the monitoring system is shown in formula (1), and the total mass calculation method of the monitoring system is shown in formula (2), and the characteristic is that the integral calculation is performed.

[0062] (1);

[0063] (2);

[0064] Wherein, m iFor sensor real-time measurement value, kg;M0 is the initial value of the sensor, kg;N is the stirring speed, rpm;D is the stirring screw diameter, m;D is the stirring screw diameter, m;The gap between the spiral blade and the stirring cylinder inner diameter is m;L is the length of the measuring plate, m;F is the sensor acquisition frequency, Hz;△M is the compensation mass, kg;T1 is the start sampling time, s;T2 is the end sampling time, s.

[0065] When the grain quality flow is monitored, the grain flow entering the grain quality flow measuring device through the discharge port enters the measuring plate, the weighing sensor generates a corresponding strain signal by real-time sensing the weight of the grain on the measuring plate, the data acquisition device is used for real-time acquisition and processing of the strain signal to form a corresponding voltage digital signal transmitted to the signal processing unit, the signal processing unit is used for converting the voltage digital signal into grain quality information and transmitting it to the monitoring unit, and the monitoring unit calculates the grain quality flow information according to the grain quality information to realize real-time monitoring of the grain quality flow.

[0066] The spiral conveying type combine harvester grain quality flow monitoring system and measuring device can realize real-time monitoring of all the grain amount of the discharge port, direct measurement is not affected by factors such as crop types, the measuring device has compact structure, is directly sleeved on the discharge port, and is convenient to install. Moreover, the measuring device has small distance in the horizontal direction (i.e. the axis direction), does not affect grain accumulation, has high practicability, can be closed or removed when the measuring device does not need to be measured, does not affect normal operation of the harvester, and is convenient to maintain and replace when damaged. Since the deformation of the cantilever beam is small when subjected to force and is easy to detect, the cantilever type weighing sensor has high measurement precision, good stability and reliability.

[0067] Finally, it should be noted that: the above examples are only used to illustrate the technical solutions of the present application, and not to limit them;Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part of the technical features;And these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A screw conveyor combine harvester grain mass flow monitoring system characterised in that, The device comprises a signal collecting unit, a signal processing unit and a monitoring unit, the signal collecting unit is in communication connection or electrical connection with the signal processing unit, and the signal processing unit is in communication connection or electrical connection with the monitoring unit; The signal collecting unit comprises a grain mass flow measuring device and a data collector, the grain mass flow measuring device is arranged at the discharge port of the spiral conveyor of the combine harvester, and the grain mass flow measuring device comprises: a shell having a hollow cavity penetrating through in the axial direction, one end of the shell is sleeved on the discharge port; a load cell arranged in the hollow cavity, comprising an opposite load cell end and a fixed end, the fixed end of the load cell is fixed to the bottom of the hollow cavity; a measuring plate arranged in the hollow cavity, the bottom of the measuring plate is fixed to the load cell end of the load cell; wherein the measuring plate, the load cell and the shell form a cantilever structure; when monitoring the grain mass flow, the grain entering the grain mass flow measuring device through the discharge port flows to the measuring plate, the load cell generates a corresponding strain signal by sensing the weight of the grain on the measuring plate in real time, the data collector is used to collect and process the strain signal in real time to form a corresponding voltage digital signal transmitted to the signal processing unit, the signal processing unit is used to convert the voltage digital signal into grain mass information and transmit it to the monitoring unit, and the monitoring unit calculates and generates grain mass flow information according to the grain mass information, so as to realize real-time monitoring of the grain mass flow; The shell is cylindrical, the measuring plate is semicylindrical, and the axis of the measuring plate and the axis of the shell are parallel to the plane where the load cell end is located.

2. The auger conveyor combine grain mass flow monitoring system of claim 1, wherein, The shell comprises a first shell and a second shell arranged opposite to each other, one end of the first shell and the second shell is rotatably connected through a rotating part, and the other end of the first shell and the second shell is locked or opened through a shell connecting piece.

3. The auger conveyor combine grain mass flow monitoring system of claim 1, wherein, The grain mass flow measuring device further comprises a fixed plate and a fixed plate connecting piece, the fixed plate is arranged in the hollow cavity and located on one side close to the discharge port, and is installed on the shell through the fixed plate connecting piece; When the grain mass flow measuring device is connected with the discharge port, one end of the shell is sleeved on the discharge port, the distance between the fixed plate and the shell is adjusted by adjusting the fixed plate connecting piece, so that the fixed plate abuts against the outer wall of the discharge port, and the grain mass flow measuring device is sleeved on the discharge port.

4. The auger conveyor combine grain mass flow monitoring system of claim 1, wherein, The outer wall of the shell is provided with a receiving box, the data collector is placed in the receiving box, the data collector comprises an MCU processor, a strain signal input interface and a frequency signal input interface, the strain signal input interface is connected with the signal output interface of the load cell, and the frequency signal input interface is connected with a frequency debugging device. The data collector is used for collecting the strain signals in real time according to the frequency set by the frequency debugging device, and the strain signals are amplified, A / D converted and filtered by the MCU processor to generate corresponding voltage digital signals.

5. A screw conveyor type combine harvester grain mass flow measuring device, characterized by The grain mass flow measuring device is arranged at the discharge port of the spiral conveyor of the combine harvester, and comprises: a shell having a hollow cavity penetrating through in the axial direction, one end of the shell being sleeved on the discharge port of the spiral conveyor; a load cell arranged in the hollow cavity and comprising a load cell end and a fixed end arranged oppositely, the fixed end of the load cell being fixed to the bottom of the hollow cavity; a measuring plate arranged in the hollow cavity, the bottom of the measuring plate being fixed to the load cell end of the load cell; wherein the measuring plate, the load cell and the shell form a cantilever structure, when the grain mass flow is measured, the grain entering the grain mass flow measuring device through the discharge port flows to the measuring plate, the load cell generates corresponding strain signals by sensing the weight of the grain on the measuring plate in real time, the strain signals are used to generate grain mass information, and the grain mass information is used to calculate and generate grain mass flow information; the shell is cylindrical, the measuring plate is semicylindrical, and the axis of the measuring plate and the axis of the shell are parallel to the plane where the load cell end is located.

6. The auger conveyor combine grain mass flow measuring device of claim 5, wherein, the shell comprises a first shell and a second shell arranged oppositely, one end of the first shell and the second shell is rotatably connected through a rotating part, and the other end of the first shell and the second shell is locked or opened through a shell connecting piece.

7. The auger conveyor combine grain mass flow measuring device of claim 6, wherein, a fixed plate and a fixed plate connecting piece are further included, the fixed plate is arranged in the hollow cavity and located on the side close to the discharge port, and is mounted on the shell through the fixed plate connecting piece; when the grain mass flow measuring device is connected with the discharge port, one end of the shell is sleeved on the discharge port, the distance between the fixed plate and the shell is adjusted by adjusting the fixed plate connecting piece, the fixed plate is abutted to the outer wall of the discharge port, and the grain mass flow measuring device is sleeved on the discharge port.

8. The auger conveyor combine grain mass flow measuring device of claim 7, wherein, the fixed plate is in an arc structure and is mounted on the second shell; the measuring device further comprises a plurality of mounting positioning pieces, the plurality of mounting positioning pieces are all arranged on the first shell and located on the end of the first shell close to the discharge port; when the grain mass flow measuring device is connected with the discharge port, the plurality of mounting positioning pieces are all abutted to the outer wall of the discharge port by adjusting the depth of the plurality of mounting positioning pieces inserted into the shell, and the grain mass flow measuring device is fixed with the discharge port.

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