Grain flow measurement apparatus and combine harvester

Abstract

A grain flow measurement apparatus and a combine harvester. The grain flow measurement apparatus comprises a mounting support (1), which is configured to be mounted on a harvesting machine; a resistive strain gauge sensor (21), which is mounted on the mounting support (1); and a resistive touch-control panel (22) and / or a piezoelectric ceramic sensor (23), wherein the resistive touch-control panel (22) is used for detecting whether there is an impact of grain kernels and measuring the number of impacting kernels, the resistive strain gauge sensor (21) is used for measuring an impact force generated by grain kernel impacts, and the piezoelectric ceramic sensor (23) is used for measuring impact forces and impact durations of impacts of different grain kernels, so as to analyze the types of the impacting grain kernels.

Description

A grain flow measurement device and a combine harvester Technical Field

[0001] This invention relates to the field of solid particle flow measurement technology, and more particularly to a grain flow measurement device and a combine harvester. Background Technology

[0002] In recent years, with the advancement of technology, intelligent agricultural machinery has gradually become an important trend in the development of modern agriculture and has begun to be widely applied in multiple operational fields such as plowing, planting, management, and harvesting.

[0003] In the field of harvesting machinery, harvesting quality is a crucial standard for evaluating the intelligence of harvesting machinery. Currently, in precision agriculture, when using combine harvesters to harvest grain, low-cost and easily applicable impulse-type yield measurement methods and devices are typically used to measure the flow rate of harvested grain to obtain grain yield and differences between plots. However, for grain harvesting machinery, in addition to measuring grain yield, cleaning losses are usually also measured to accurately assess the operational quality of the corresponding harvesting machinery.

[0004] Currently, the industry typically uses different measuring devices installed at different locations on harvesting machinery to measure grain yield and loss separately. This approach results in high R&D and production costs for the corresponding harvesting machinery due to the limited functionality of each measuring device. Therefore, developing a grain flow measurement device that can measure both grain yield and grain loss will have a significant impact on reducing the cost input for harvesting machinery manufacturers and promoting the intelligent development of harvesting machinery.

[0005] Summary of the Invention

[0006] The purpose of this invention is to provide a grain flow measurement device and a combine harvester. By integrating multiple signal measurement methods, it can be applied to two scenarios: grain impulse yield measurement and loss measurement, thereby reducing the research and development and production costs of the corresponding harvesting machinery and promoting energy conservation and cost reduction for enterprises.

[0007] The technical solution provided by this invention is as follows:

[0008] This invention provides a grain flow measurement device, comprising:

[0009] Mounting brackets are used for mounting onto harvesting machinery;

[0010] A resistance strain gauge sensor, which has a planar plate structure and is mounted on the mounting bracket, is used to measure the impact force generated by the impact of grain kernels.

[0011] A resistive touch panel, wherein the resistive touch panel is installed on the side of the resistive strain gauge sensor that is subjected to grain impact in the thickness direction, for measuring whether there is grain impact and the number of impacting grains; and / or a piezoelectric ceramic sensor, wherein the piezoelectric ceramic sensor has a plate-like structure and is installed on the side of the resistive strain gauge sensor that is opposite to the side subjected to grain impact in the thickness direction, for measuring grain impact force and impact duration to analyze the type of impacting grain;

[0012] The signal processor is electrically connected to the resistive strain gauge sensor, the resistive touch panel, and / or the piezoelectric ceramic sensor.

[0013] The present invention provides a grain flow measurement device, which is illustrated using a combine harvester as an example. In practical applications, two of these grain flow measurement devices are installed at the outlet of the grain elevator on the top of the combine harvester's grain bin and at the tail of the cleaning screen, respectively. When the harvester is started and in an unharvested state, the resistive touch panel and / or piezoelectric ceramic sensor will not generate a signal due to the absence of grain impact. At this time, the resistive strain gauge sensor generates a deformation signal due to the vibration of the combine harvester, the residual vibration from impacts, etc., and feeds the corresponding deformation signal back to the signal processor, thereby automatically saving the deformation signal as the equipment's background noise.

[0014] When the harvester is in harvesting mode, the grain is threshed by the combine harvester, and the hulled grains are conveyed to the top of the grain silo by the grain elevator, causing the grains to fall into the silo from top to bottom. As the grains fall, they first impact a resistive touch panel, and then the impact force is transmitted to a resistive strain gauge sensor; alternatively, the grains first impact a resistive strain gauge sensor, and then the impact force is transmitted to a piezoelectric ceramic sensor; or, the grains first impact a resistive touch panel, and then the impact force is transmitted sequentially to both the resistive strain gauge sensor and the piezoelectric ceramic sensor. At this time, the resistive strain gauge sensor senses the impact force of the falling grains, the resistive touch panel senses the number of impacted grains, and transmits the corresponding quantity information to the signal processor. The piezoelectric ceramic sensor measures the impact force and duration of grain grains and transmits the corresponding impact force and time signals to the signal processor. The signal processor acquires the impact force information, the number of impacted grains, and / or the impact force and duration of the grain grains. Using m = F / n, it calculates the weight of a single grain. Based on the impact duration and empirical values, it calculates the grain type. Combining the corresponding number of impacted grains signal, it obtains the number of grain grains per grain. The sensitivity of the signal comparison circuit is adjusted based on the weight of a single grain. This satisfies the automatic adjustment for different grain types and eliminates the influence of grain moisture on the loss. At the same time, the grain weight can be calculated after removing background noise from the impact force measured by the resistance strain gauge sensor.

[0015] By integrating multiple signal measurement methods on the mounting bracket, the grain flow measurement device can be installed at different positions on different combine harvesters to achieve both impulse yield measurement and loss measurement. The grain flow measurement device has a simple structure; at the same time, the connection between the multiple signal measurement structures is simple, which effectively reduces the production difficulty of the grain flow measurement device and saves the production cost of the corresponding harvesting machinery, i.e., the combine harvester.

[0016] In some embodiments, a shock-absorbing base plate is mounted on the mounting bracket, and the shock-absorbing base plate is detachably connected to the mounting bracket;

[0017] The resistive strain gauge sensor, the resistive touch panel, and / or the piezoelectric ceramic sensor together form a sensing panel;

[0018] The sensing panel is mounted on the upper surface of the shock-absorbing substrate, and a shock-absorbing pad is provided between the sensing panel and the shock-absorbing substrate.

[0019] The grain flow measurement device provided by this invention features a shock-absorbing base plate supporting the sensing panel, which improves the ease of mounting the sensing panel on the bracket. The shock-absorbing pads separating the sensing panel from the shock-absorbing base plate help reduce the occurrence of collisions between the sensing panel and the shock-absorbing base plate caused by harvesting machinery vibrations, thus reducing redundant signals and improving the accuracy of the measurement results.

[0020] In some embodiments, the resistive touch panel is adhesively fixed to the resistive strain sensor, and / or the piezoelectric ceramic sensor is welded to the resistive strain sensor, and the piezoelectric ceramic sensor is disposed in the middle of the corresponding side of the resistive strain sensor;

[0021] The shock-absorbing pad includes double-sided foam adhesive.

[0022] The double-sided foam adhesive is attached to the edge of the resistance strain gauge sensor corresponding to the piezoelectric ceramic sensor, and the resistance strain gauge sensor is fixed to the shock-absorbing substrate by the double-sided foam adhesive.

[0023] The grain flow measurement device provided by this invention uses double-sided foam tape as a shock-absorbing pad. The shock-absorbing material is readily available and the installation method is simple, which helps to reduce the production cost of the grain flow measurement device. Furthermore, isolation and shock absorption are achieved simultaneously when the sensing panel is installed on the shock-absorbing substrate, which effectively improves the production efficiency of the grain flow measurement device.

[0024] In some embodiments, the sensing panels are arranged in a rectangular array on the upper surface of the shock-absorbing substrate.

[0025] The grain flow measurement device provided by this invention features multiple sensing panels arranged in a rectangular array, which helps to collect as many grains as possible and maximize the measurement effect of the sensing panels, thereby further improving the accuracy of the measurement results.

[0026] In some embodiments, shock-absorbing damping is embedded between any adjacent sensing panels.

[0027] The grain flow measurement device provided by this invention uses shock absorption damping to separate adjacent sensing panels for signal isolation, reducing the occurrence of collisions between adjacent sensing panels and their impact on the sensing signal of the resistance strain gauge sensor, thereby effectively improving the accuracy of the measurement results.

[0028] In some embodiments, the sensing panel further includes a tempered glass film adhered to the side of the resistive touch panel opposite to the resistive strain gauge sensor.

[0029] The grain flow measurement device provided by this invention uses a tempered glass film to cover and protect the resistive touch panel, reducing the probability of grain grains, stones, etc., damaging the resistive touch panel and helping to extend the service life of the grain flow measurement device.

[0030] In some embodiments, a clearance hole is provided on the damping substrate corresponding to the center of any of the sensing panels. After the sensing panel is installed at the corresponding position on the damping substrate, the piezoelectric ceramic sensor extends into the clearance hole.

[0031] The edge of the piezoelectric ceramic sensor is in clearance fit with the inner wall of the clearance hole.

[0032] The grain flow measurement device provided by this invention has a clearance hole on the shock-absorbing substrate to accommodate the piezoelectric ceramic sensor, which helps to reduce the overall thickness of the shock-absorbing substrate and the sensing panel, thus facilitating the lightweight development of the grain flow measurement device. At the same time, by ensuring that the edge of the piezoelectric ceramic sensor does not contact the inner wall of the clearance hole, the probability of vibrations generated by harvesting machinery being transmitted to the piezoelectric ceramic sensor and the resistance strain gauge sensor is reduced, thereby further reducing redundant signal interference.

[0033] In some embodiments, a receiving groove is formed on the upper surface of the shock-absorbing substrate, and any of the clearance holes are formed at the bottom of the receiving groove and communicate with the receiving groove.

[0034] Each of the aforementioned sensing panels is embedded in the receiving groove, and the side of each of the aforementioned sensing panels facing away from the piezoelectric ceramic sensor is not higher than the end face of the receiving groove opening.

[0035] The grain flow measurement device provided by this invention, by installing the sensing panel in the receiving groove and setting the upper surface of the sensing panel not higher than the end face of the receiving groove opening, helps to further reduce the overall thickness of the shock-absorbing substrate and the sensing panel; at the same time, it helps to further promote the lightweighting of the grain flow measurement device.

[0036] In some embodiments, a resistive strain sensor is disposed between the mounting bracket and the shock-absorbing substrate. The resistive strain sensor is used to sense the impact force on the sensing panel to calculate the total weight of the grain. The resistive strain sensor is electrically connected to the signal processor.

[0037] In some embodiments, the mounting bracket includes a support plate and a base plate, the support plate and the base plate being set at a certain angle; the shock-absorbing base plate is detachably mounted on the end of the support plate away from the base plate via a support frame;

[0038] The resistive strain sensor is mounted on the support frame. The resistive strain sensor is a columnar resistive strain sensor, and its sensing end faces the damping substrate.

[0039] The base plate is provided with an adjusting component for assisting the movement of the sensing panel relative to the harvesting machinery. The adjusting component includes a fastening bolt. The base plate is provided with a slotted hole for the fastening bolt to pass through. The threaded end of the fastening bolt passes through the slotted hole and is screwed into the harvesting machinery.

[0040] The fastening bolt slides along the length of the waist-shaped hole and engages with the inner wall of the waist-shaped hole.

[0041] The grain flow measurement device provided by this invention allows for adjustment of the installation position of the base plate on harvesting machinery by means of the sliding engagement between the fastening bolt and the inner wall of the slotted hole. The adjustment structure is simple, convenient for production, and effectively saves production costs for enterprises. At the same time, the adjustable installation position of the base plate on the harvesting machinery helps to meet the installation requirements of the grain flow measurement device on more models of harvesting machinery, thereby expanding the application range of the grain flow measurement device and enhancing its practicality.

[0042] Furthermore, a columnar resistive strain sensor is installed between the support frame and the shock-absorbing base plate. When the grains fall and impact the sensing panel, the shock-absorbing base plate deforms under the impact force and touches the sensing end of the columnar resistive strain sensor. The columnar resistive strain sensor senses the impact force when the grains fall and transmits the corresponding impact force signal to the signal processor. The signal processor obtains the corresponding impact force information and calculates the total weight of the falling grains, thereby calculating the total weight of the harvested grains. The total grain weight weighing structure is simple, highly automated, convenient in the measurement process, and accurate in the measurement results.

[0043] On the other hand, a combine harvester is also provided, including any of the grain flow measurement devices described above.

[0044] Compared with the prior art, the grain flow measurement device and combine harvester provided in this application have at least one of the following advantages:

[0045] 1. In this application, by integrating a resistance strain gauge sensor, a resistance touch panel and a piezoelectric ceramic sensor into a grain flow measurement device, the same grain flow measurement device can be used for both grain impulse yield measurement and loss measurement, effectively reducing the R&D and production cost investment of enterprises in intelligent harvesting machinery; at the same time, it helps to expand the application scope of the grain flow measurement device and enhance its practicality.

[0046] 2. In this application, by setting foam double-sided tape as a shock-absorbing pad, the sensing panel is isolated and protected from shock at the same time as it is installed on the shock-absorbing substrate. The shock-absorbing structure is simple and easy to install and operate, which effectively improves the production efficiency of the grain flow measurement device and reduces the production cost, thereby helping to further reduce the cost invested by enterprises in the corresponding intelligent harvesting machinery.

[0047] 3. In this application, by opening a receiving groove on the upper surface of the shock-absorbing substrate and opening a clearance hole at the bottom of the receiving groove, the sensing panel is installed in the receiving groove. The upper surface of the sensing panel is set not higher than the end face of the receiving groove opening, and the clearance hole is used to accommodate the piezoelectric ceramic sensor. This effectively reduces the overall thickness of the shock-absorbing substrate and the sensing panel, and facilitates the lightweight development of the grain flow measurement device.

[0048] 4. In this application, the installation position of the base plate on the harvesting machinery is adjusted by means of the sliding fit between the fastening bolt and the inner wall of the waist-shaped hole. The adjustment structure is simple, easy to produce, and effectively saves the production cost of enterprises. At the same time, the adjustable installation position of the base plate on the harvesting machinery helps to meet the installation requirements of the grain flow measurement device on more models of harvesting machinery, thereby expanding the application range of the grain flow measurement device and enhancing its practicality. Attached Figure Description

[0049] The preferred embodiments will now be described in a clear and easy-to-understand manner, with reference to the accompanying drawings, to further explain the above-mentioned characteristics, technical features, advantages, and implementation methods of this solution.

[0050] Figure 1 is an isometric schematic diagram of the overall structure of the grain flow measurement device according to an embodiment of the present invention;

[0051] Figure 2 is an exploded view of the overall structure of the sensing panel, which is the main embodiment of the present invention.

[0052] Figure 3 is a plan view showing the main positions of the clearance hole and the shock-absorbing pad in an embodiment of the present invention;

[0053] Figure 4 is an installation diagram of the grain flow measurement device used for grain yield measurement, which is a key embodiment of the present invention.

[0054] Figure 5 is an isometric schematic diagram showing the installation position of the resistive strain sensor in the embodiment of the present invention;

[0055] Figure 6 is an exploded view of the mounting method of the resistive strain sensor on the support frame, which is the main embodiment of the present invention.

[0056] Explanation of reference numerals in the attached figures:

[0057] 1. Mounting bracket; 11. Support plate; 12. Base plate; 121. Waist-shaped hole; 2. Sensing panel; 21. Resistance strain gauge sensor; 211. Vibration damping pad; 22. Resistive touch panel; 23. Piezoelectric ceramic sensor; 24. Tempered glass film; 3. Vibration damping substrate; 31. Receiving groove; 32. Clearance hole; 4. Vibration damping; 5. Support frame; 51. Support plate; 511. Mounting groove; 52. Support ear; 6. Vibration damping interlayer; 7. Resistance strain gauge sensor. Detailed Implementation

[0058] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the specific implementation methods of the present invention will be described below with reference to the accompanying drawings. Obviously, the drawings described below are merely some embodiments of the present invention. For those skilled in the art, other drawings and other implementation methods can be obtained based on these drawings without any creative effort.

[0059] To keep the drawings concise, only the parts relevant to the invention are shown schematically in each figure, and they do not represent the actual structure of the product. Furthermore, for ease of understanding, in some figures, only one of components with the same structure or function is shown schematically, or only one is labeled. In this document, "one" can mean not only "only one" but also "more than one".

[0060] In one embodiment, referring to Figures 1 to 4 of the specification drawings, a grain flow measurement device includes a mounting bracket 1, a resistance strain gauge sensor 21, a resistive touch panel 22, and / or a piezoelectric ceramic sensor 23 disposed on the mounting bracket 1. The resistance strain gauge sensor 21 and the piezoelectric ceramic sensor 23 are both plate-shaped structures, with the piezoelectric ceramic sensor 23 mounted on the side of the resistance strain gauge sensor 21 away from the side subjected to grain impact in the thickness direction. The resistive touch panel 22 is mounted on the side of the resistance strain gauge sensor 21 subjected to grain impact in the thickness direction. The resistance strain gauge sensor 21, the resistive touch panel 22, and / or the piezoelectric ceramic sensor 23 are mounted to harvesting machinery via the mounting bracket 1. The device also includes a signal processor, with the resistance strain gauge sensor 21, the resistive touch panel 22, and / or the piezoelectric ceramic sensor 23 all electrically connected to the signal processor.

[0061] In practical applications, after the grain is harvested and threshed by the harvesting machinery, the grains impact the resistive touch panel 22. The impact force is then transmitted sequentially to the resistive strain sensor 21 and / or the piezoelectric ceramic sensor 23. The resistive touch panel 22 measures whether there is grain impact and the number of impacting grains. The resistive strain sensor 21 measures the impact force generated by the grain impact. The piezoelectric ceramic sensor 23 measures the impact force and impact duration of different grain impacts to analyze the type of impacting grains.

[0062] In this embodiment of the invention, a combine harvester is used as an example to illustrate its operating principle. In practical applications, the two grain flow measurement devices are respectively installed at the outlet of the grain elevator on the top of the combine harvester's grain bin and at the tail of the cleaning screen. When the harvester is started and in an unharvested state, the resistive touch panel 22 and / or the piezoelectric ceramic sensor 23 will not generate a signal due to the absence of grain impact. At the same time, due to the vibration of the combine harvester, residual vibration from impacts, etc., the resistive strain sensor 21 generates a deformation signal. The resistive strain sensor 21 feeds back the corresponding deformation signal to the signal processor, thereby automatically saving the deformation signal as the equipment's background noise.

[0063] When the combine harvester is in harvesting mode, the grain grains are threshed by the combine harvester and conveyed to the top of the grain silo by the grain elevator, causing the grain grains to fall into the silo from top to bottom. As the grain grains fall, they impact the resistive touch panel 22, and the impact force is transmitted sequentially to the resistive strain gauge sensor 21 and / or the piezoelectric ceramic sensor 23. At this time, the resistive touch panel 22 measures the number of impacted grains and transmits the corresponding quantity signal to the signal processor; the resistive strain gauge sensor 21 senses the impact force of the falling grains and transmits the corresponding impact force information to the signal processor; the piezoelectric ceramic sensor 23 measures the grain impact force and impact duration, and transmits the corresponding impact force signal and... The time signal is transmitted to the signal processor; the signal processor acquires the corresponding impact force information, impact number information and / or grain impact force and impact duration, analyzes the grain type based on the grain impact force and impact duration, calculates the number of individual grains based on the impact number signal, and calculates the weight of a single grain using m = F / n. The sensitivity of the signal comparison circuit is adjusted based on the weight of a single grain, thereby enabling the grain flow measurement device to meet the measurement requirements of different grain types and improving its applicability; at the same time, it helps to eliminate the influence of grain moisture on the loss; and the grain weight can be calculated after removing background noise based on the impact force measured by the resistance strain gauge sensor 21.

[0064] The embodiments of this invention integrate multiple signal measurement methods on the mounting bracket 1, allowing the grain flow measurement device to be installed at different locations on different combine harvesters. This enables both impulse yield measurement and loss measurement of grain. Harvesting machinery manufacturers only need to develop one grain flow measurement device. Furthermore, the device's simple structure effectively reduces the R&D and production costs for intelligent harvesting machinery, promoting energy conservation and cost reduction, and contributing to the intelligent development of harvesting machinery. Simultaneously, the grain flow measurement device is applicable to flow measurement scenarios for different types of grains, offering wide applicability and strong practicality.

[0065] In one embodiment, based on the above embodiments, specifically referring to Figures 1 to 4, in this embodiment of the present invention, both the resistive touch panel 22 and the resistive strain gauge sensor 21 are square plate-shaped structures and are glued and fixed; the piezoelectric ceramic sensor 23 is a circular sheet-shaped structure, arranged parallel to the resistive strain gauge sensor 21, and fixedly welded to the center of the corresponding side of the resistive strain gauge sensor 21. Of course, the resistive touch panel 22, the resistive strain gauge sensor 21, and the piezoelectric ceramic sensor 23 can be arranged in any other arbitrary shape according to actual needs. The description of the shapes of the three in this embodiment should not be construed as a limitation on the scope of protection of the present invention.

[0066] In this embodiment of the invention, the resistive strain gauge sensor 21, the resistive touch panel 22, and the piezoelectric ceramic sensor 23 together form a sensing panel 2 with a generally square plate-like structure. A shock-absorbing substrate 3 is also mounted on the mounting bracket 1, and the sensing panel 2 is detachably mounted on the shock-absorbing substrate 3 to facilitate its installation and fixation on the mounting bracket 1. Meanwhile, since the mechanical vibration frequency is relatively kept within a certain range, in this embodiment of the application, the shock-absorbing substrate 3 is made of a combination of hard plastic and soft rubber. Using the shock-absorbing substrate 3 to fix and support the sensing panel 2 can filter out some of the mechanical vibration, helping to minimize the probability of the vibration of the entire harvesting machine being transmitted to the sensing panel 2 through the mounting bracket 1.

[0067] Referring to Figures 1 to 3, in this embodiment of the present invention, the shock-absorbing substrate 3 has a rectangular plate structure. A receiving groove 31 is provided in the middle of the upper surface of the shock-absorbing substrate 3 to accommodate the shape of the sensing panel 2. A shock-absorbing pad 211 is provided on the edge of the sensing panel 2 on the side where the resistance strain gauge sensor 21 is fixed to the piezoelectric ceramic sensor 23. In this embodiment of the present invention, the shock-absorbing pad 211 includes double-sided foam adhesive. During assembly, the side of the sensing panel 2 corresponding to the piezoelectric ceramic sensor 23 is embedded downwards in the receiving groove 31. The resistance strain gauge sensor 21 is adhered and fixed to the bottom of the receiving groove 31 by the double-sided foam adhesive, thereby achieving detachable fixing of the sensing panel 2 and the shock-absorbing substrate 3. Using double-sided foam adhesive to fix the sensing panel 2 and the shock-absorbing substrate 3 is a simple and reliable fixing method. Furthermore, using double-sided foam adhesive as the shock-absorbing pad 211 makes the shock-absorbing material readily available, effectively reducing the production cost of the grain flow measurement device.

[0068] Furthermore, referring to Figures 1 and 4, in this embodiment of the present invention, after the sensing panel 2 is assembled onto the shock-absorbing substrate 3, the side of it facing away from the piezoelectric ceramic sensor 23 is not higher than the end face of the groove opening of the receiving groove 31, in order to reduce the probability of the resistive touch panel 22 being damaged by bumps, and at the same time to reduce the overall thickness of the shock-absorbing substrate 3 plus the sensing panel 2, so as to promote the lightweight development of the grain flow measurement device.

[0069] Preferably, referring to FIG2, in order to extend the service life of the resistive touch panel 22 and reduce the probability of the resistive touch panel 22 being damaged by impacts from grains, stones, etc. or by bumps, in this embodiment of the present invention, the sensing panel 2 may further include a tempered film 24, which is adhered and fixed to the side of the resistive touch panel 22 away from the resistive strain sensor 21.

[0070] Furthermore, referring to Figures 1 to 3, in this embodiment of the present invention, a clearance hole 32 is provided at the bottom of the receiving groove 31 corresponding to the position of the piezoelectric ceramic sensor 23. After the sensing panel 2 is installed in the receiving groove 31, the piezoelectric ceramic sensor 23 on it extends into the corresponding clearance hole 32, and its edge is kept in clearance fit with the inner wall of the corresponding clearance hole 32. This reduces the probability that the vibration generated by the harvesting machinery is transmitted to the piezoelectric ceramic sensor 23 and the resistance strain gauge sensor 21 and generates redundant signal interference; and further reduces the overall thickness of the shock-absorbing substrate 3 and the sensing panel 2, further promoting the lightweight development of the grain flow measurement device.

[0071] Furthermore, to improve the accuracy of the measurement results of the grain flow measuring device, referring to Figure 1, in this embodiment of the present invention, multiple sensing panels 2 are provided on the shock-absorbing substrate 3, and the multiple sensing panels 2 are arranged in a rectangular array to adapt to the shape of the shock-absorbing substrate 3; multiple clearance holes 32 are provided at the bottom of the receiving groove 31, and after assembly, the sensing panels 2 correspond one-to-one with the clearance holes 32. In addition, in order to isolate the signals of adjacent sensing panels 2 and reduce the probability of mutual collision between adjacent sensing panels 2 and affecting the sensing signal of the resistance strain gauge sensor 21, shock-absorbing dampers 4 are embedded between any adjacent sensing panels 2 and between any side wall of the receiving groove 31 and the side wall of the adjacent sensing panel 2.

[0072] Furthermore, referring to Figure 1, in this embodiment of the present invention, the mounting bracket 1 includes an integrally formed support plate 11 and a base plate 12. The support plate 11 and the base plate 12 are arranged at a certain angle. Referring to Figure 1, to facilitate the installation of the shock-absorbing base plate 3, the support plate 11 and the base plate 12 are perpendicular to each other, and the shock-absorbing base plate 3 is installed at the end of the support plate 11 away from the base plate 12. Moreover, to improve the support strength of the mounting bracket 1, multiple support plates 11 can be provided. Referring to Figure 1, two support plates 11 are provided, with the two support plates 11 located at any opposite ends of the base plate 12, and the shock-absorbing base plate 3 is installed at the end of the two support plates 11 away from the base plate 12.

[0073] To facilitate adjustment of the grain flow measurement device's installation position on the harvesting machinery, in this embodiment of the invention, the base plate 12 is provided with an adjusting component to assist the movement of the mounting bracket 1 relative to the harvesting machinery. In this embodiment, the adjusting component includes a fastening bolt, and the base plate 12 is provided with a slotted hole 121 through which the fastening bolt passes. The threaded end of the fastening bolt penetrates the slotted hole 121 and is screwed into the harvesting machinery, thereby achieving a detachable connection between the mounting bracket 1 and the harvesting machinery. Simultaneously, the fastening bolt slides along the length of the slotted hole 121 against the inner wall of the slotted hole 121.

[0074] In practical applications, when it is necessary to adjust the installation position of the grain flow measuring device on the harvesting machinery, first loosen the fastening bolts so that the fastening bolts slide relative to the inner wall of the waist-shaped hole 121 along the length direction of the waist-shaped hole 121; after the installation position of the grain flow measuring device is determined, tighten the fastening bolts to fix the grain flow measuring device in the corresponding position of the harvesting machinery.

[0075] Meanwhile, in this embodiment of the present invention, the shock-absorbing base plate 3 is detachably mounted on one end of the two support plates 11 away from the base plate 12 via the support frame 5. Specifically, referring to FIG1, the support frame 5 includes a support plate 51 and a support ear 52, and the support plate 51 and the support ear 52 are perpendicular to each other; during assembly, the shock-absorbing base plate 3 is detachably mounted on the side of the support plate 51 away from the support ear 52 by fixing bolts, and the support ear 52 is detachably fixed to the corresponding support plate 11 by fixing bolts, thereby realizing the detachable connection between the shock-absorbing base plate 3 and the mounting bracket 1.

[0076] Of course, in order to reduce the transmission of vibrations generated by the harvesting machinery to the shock-absorbing base plate 3 and the sensing panel 2, in this embodiment of the present invention, a shock-absorbing interlayer 6 can be provided between the support plate 51 and the shock-absorbing base plate 3 and / or between the support ear 52 and the corresponding support plate 11, thereby improving the accuracy of the measurement results of the grain flow measuring device.

[0077] To enhance the functionality of the grain flow measurement device, enabling it to simultaneously measure the total weight of harvested grain, in this embodiment, a resistive strain sensor 7 can be installed between the support frame 5 and the shock-absorbing substrate 3. The resistive strain sensor 7 senses the impact force on the sensing panel 2. Of course, the resistive strain sensor 7 needs to be electrically connected to a signal processor. Specifically, referring to Figures 5 and 6, the resistive strain sensor 7 is configured as a columnar resistive strain sensor. It is installed on the side of the support plate 51 closest to the shock-absorbing substrate 3 in the thickness direction, with its sensing tip facing the shock-absorbing substrate 3.

[0078] At least one resistive strain sensor 7 is provided on the support plate 51, as shown in Figures 5 and 6. The number of resistive strain sensors 7 is two. To extend the service life of the resistive strain sensors 7 and reduce the probability of damage during production and assembly, referring to Figures 5 and 6, in this embodiment of the application, mounting slots 511 are provided on the support plate 51 at positions corresponding to the two resistive strain sensors 7. The two resistive strain sensors 7 are installed in the corresponding mounting slots 511 using bolts or other connecting components. Furthermore, to facilitate the installation of the resistive strain sensors 7, the two mounting slots 511 are located at any opposite ends of the support plate 51, allowing the resistive strain sensors 7 to be inserted or removed from the side of the support plate 51. This design is simple and easy to operate.

[0079] In this embodiment of the present invention, it should be noted that in practical applications, the grain flow measurement device will have a proportionality coefficient K between the measurement result and the actual grain flow data because the grain on the impact sensing panel 2 is part of the actual harvested and lost grain by the harvesting machinery. This proportionality coefficient K needs to be determined by different installation methods of the grain flow measurement device and different models of harvesting machinery.

[0080] The following discussion will focus on a case where the harvesting machinery is a combine harvester and the aforementioned grain flow measurement device is installed on the combine harvester.

[0081] In one embodiment, a combine harvester includes the grain flow measuring device described in the above embodiment. In practical applications, two of the grain flow measuring devices are respectively installed at the outlet of the grain elevator on the top of the combine harvester's grain bin and at the tail of the cleaning screen using fastening bolts.

[0082] When the combine harvester is started and in an unharvested state, the resistive touch panel 22 and the piezoelectric ceramic sensor 23 will not generate signals due to the absence of grain impact. At the same time, due to the vibration of the combine harvester and the residual vibration of the impact, the resistive strain sensor 21 generates a deformation signal. The resistive strain sensor 21 feeds back the corresponding deformation signal to the signal processor, thereby automatically saving the deformation signal as the equipment noise floor.

[0083] When the harvester is in harvesting mode, grains and other crops are threshed by the combine harvester and impacted by the elevator onto the resistive touch panel 22. The impact force is transmitted sequentially to the resistive strain gauge sensor 21 and the piezoelectric ceramic sensor 23. At this time, the resistive touch panel 22 measures the number of impacted grains and transmits the corresponding quantity signal to the signal processor. The piezoelectric ceramic sensor 23 measures the impact force of the grains and the duration of the signal, and transmits the corresponding impact force signal and time signal to the signal processor. The signal processor analyzes the data to determine the type of grain and, combined with the corresponding number of impacted grains signal, determines the number of individual grains. The resistive strain gauge sensor 21 collects the impact force of the grains and, combined with the measurement results from the resistive touch panel 22 and the piezoelectric ceramic sensor 23, determines the weight of a single grain. Simultaneously, based on the impact force measured by the resistive strain gauge sensor 21, the weight of the grain can be calculated after removing background noise. At the same time, as the grains fall and impact the sensing panel 2, the sensing panel 2 deforms under the impact force and touches the sensing end of the resistive strain sensor 7. The resistive strain sensor 7 senses the impact force when the grains fall and transmits the corresponding impact force signal to the signal processor. The signal processor obtains the corresponding impact force information, calculates the total weight of the falling grains, and can then calculate the total weight of the harvested grains.

[0084] By integrating a resistance strain gauge sensor 21, a resistive touch panel 22, and / or a piezoelectric ceramic sensor 23 and a resistance strain gauge sensor 7 onto the mounting bracket 1, the grain flow measurement device can be applied to two different scenarios—grain impulse yield measurement, loss measurement, and total grain measurement—when installed at different locations on different combine harvesters. Furthermore, the overall structure of the grain flow measurement device is simple, and the installation process on the combine harvester is convenient and easy to operate, effectively reducing the cost investment of enterprises in the research and development and production of grain flow measurement devices, and saving the production cost of corresponding harvesting machinery.

[0085] It should be noted that the above embodiments can be freely combined as needed. The above are merely preferred embodiments of the present invention. It should be pointed out that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A grain flow measurement device, characterized in that, include: Mounting brackets are used for mounting onto harvesting machinery; A resistance strain gauge sensor, which has a planar plate structure and is mounted on the mounting bracket, is used to measure the impact force generated by the impact of grain kernels. A resistive touch panel, wherein the resistive touch panel is installed on the side of the resistive strain gauge sensor that is subjected to grain impact in the thickness direction, for measuring whether there is grain impact and the number of impacting grains; and / or a piezoelectric ceramic sensor, wherein the piezoelectric ceramic sensor has a plate-like structure and is installed on the side of the resistive strain gauge sensor that is opposite to the side subjected to grain impact in the thickness direction, for measuring grain impact force and impact duration to analyze the type of impacting grain; The signal processor is electrically connected to the resistive strain gauge sensor, the resistive touch panel, and / or the piezoelectric ceramic sensor.

2. The grain flow measurement device according to claim 1, characterized in that, A shock-absorbing base plate is mounted on the mounting bracket, and the shock-absorbing base plate is detachably connected to the mounting bracket. The resistive strain gauge sensor, the resistive touch panel, and / or the piezoelectric ceramic sensor together form a sensing panel; The sensing panel is mounted on the upper surface of the shock-absorbing substrate, and a shock-absorbing pad is provided between the sensing panel and the shock-absorbing substrate.

3. The grain flow measurement device according to claim 2, characterized in that, The resistive touch panel is glued and fixed to the resistive strain sensor, and / or the piezoelectric ceramic sensor is welded and fixed to the resistive strain sensor, and the piezoelectric ceramic sensor is disposed in the middle of the corresponding side of the resistive strain sensor; The shock-absorbing pad includes double-sided foam adhesive. The double-sided foam adhesive is attached to the edge of the resistance strain gauge sensor corresponding to the piezoelectric ceramic sensor, and the resistance strain gauge sensor is fixed to the shock-absorbing substrate by the double-sided foam adhesive.

4. A grain flow measurement device according to claim 2 or 3, characterized in that, The sensing panels are arranged in a rectangular array on the upper surface of the shock-absorbing substrate.

5. A grain flow measurement device according to claim 4, characterized in that, Vibration damping is provided between any two adjacent sensing panels.

6. A grain flow measurement device according to claim 2, characterized in that, The sensing panel also includes a tempered glass film, which is adhered to the side of the resistive touch panel opposite to the resistive strain sensor.

7. A grain flow measurement device according to claim 4, characterized in that, A clearance hole is provided on the shock-absorbing substrate corresponding to the center of any of the sensing panels. After the sensing panel is installed at the corresponding position on the shock-absorbing substrate, the piezoelectric ceramic sensor extends into the clearance hole. The edge of the piezoelectric ceramic sensor is in clearance fit with the inner wall of the clearance hole.

8. A grain flow measurement device according to claim 7, characterized in that, The upper surface of the shock-absorbing substrate is provided with a receiving groove, and any of the clearance holes are opened at the bottom of the receiving groove and communicate with the receiving groove. Each of the aforementioned sensing panels is embedded within the receiving groove, and each of the aforementioned sensing panels faces away from the receiving groove. One side of the piezoelectric ceramic sensor is not higher than the end face of the accommodating groove opening.

9. A grain flow measurement device according to any one of claims 2-3 and 5-8, characterized in that, A resistive strain sensor is provided between the mounting bracket and the shock-absorbing substrate. The resistive strain sensor is used to sense the impact force on the sensing panel to calculate the total weight of the grain. The resistive strain sensor is electrically connected to the signal processor.

10. A grain flow measurement device according to claim 9, characterized in that, The mounting bracket includes a support plate and a base plate, the support plate and the base plate being set at a certain angle; the shock-absorbing base plate is detachably mounted on the end of the support plate away from the base plate via a support frame; The resistive strain sensor is mounted on the support frame. The resistive strain sensor is a columnar resistive strain sensor, and its sensing end faces the damping substrate. The base plate is provided with an adjusting component for assisting the movement of the sensing panel relative to the harvesting machinery. The adjusting component includes a fastening bolt. The base plate is provided with a slotted hole for the fastening bolt to pass through. The threaded end of the fastening bolt passes through the slotted hole and is screwed into the harvesting machinery. The fastening bolt slides along the length of the waist-shaped hole and engages with the inner wall of the waist-shaped hole.

11. A combine harvester, characterized in that, Includes the grain flow measuring device as described in any one of claims 1-10.

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