Beehive weighing equipment with anti-overturning function

Abstract

The invention discloses a beehive weighing device with an anti-overturning function, which comprises a base, a cantilever beam weighing sensor, a tray and a weighing disc, a beehive to be weighed is placed on the top surface of the weighing disc, and the mass center connecting line formed by the mass center of the weighing disc and the mass center of the tray coincides with the center line of the bearing end of the cantilever beam weighing sensor. The bottom surface of the weighing disc is provided with three hemispherical supporting points which are uniformly distributed around the mass center connecting line, and the top surface of the tray is provided with cambered surface grooves matched with the hemispherical supporting points; three springs which are vertically arranged and are uniformly distributed around the mass center connecting line are connected between the bottom surface of the weighing disc and the top surface of the base, and the same initial pre-tightening force is applied to each spring; and a foldable organ protective cover is also arranged between the bottom surface of the base and the contour edge of the weighing disc. The beehive weighing device integrates the functions of stable weighing, overturning prevention, impurity prevention and the like, the labor efficiency is improved, and meanwhile the reliability of weighing data is guaranteed.

Description

Technical Field

[0001] The present invention belongs to the technical field of beehives, and specifically relates to a beehive weighing device with an anti-overturning function. Background Art

[0002] As an important part of agricultural production, the beekeeping industry not only provides valuable products such as natural honey and pollen for humans, but also promotes the increase of crop yields through bee pollination. In beekeeping practice, monitoring the weight change of beehives is crucial for evaluating the health status of bee colonies, predicting the peak honey flow period, and optimizing better harvesting times. However, traditional monitoring methods mostly rely on manual regular inspections, which are not only inefficient but also difficult to provide real-time data on the beehive status. In order to manage bee colonies more efficiently and accurately, the application of modern technology has become increasingly important.

[0003] After retrieval, the invention patent with the publication number CN109708738B discloses a beehive weighing device, which relates to the technical field of weighing and solves the technical problem that there is no dedicated device to monitor the weight of existing beehives, improving labor efficiency. However, this solution uses four discrete half-bridge weighing sensors to form two full-bridge circuits for beehive weighing. The temperature at the location of each independent sensitive element and the inclination of the beehive are different, which will affect the measurement accuracy. At the same time, this patent does not design a protective cover for the sensor. During long-term use, the weighing sensor will be affected by impurities such as honey and sewage residues, affecting the accuracy of the weighing result. The utility model patent with the publication number CN217637590U discloses a weighing module using a beam sensor and a weighing device including this module. This utility model patent has a simple structure, good anti-overturning performance and is easy to maintain, but the stability of the center-of-gravity structure needs to be improved. A structure of a multi-point weighing method is proposed in the journal titled "A Structure for Accurately Determining the Mass and Center of Gravity of Rigid Bodies", which makes the force act on the designed axis. After experimental verification, this structure can avoid lateral force and improve weighing repeatability. However, it uses three cantilever beam weighing sensors for weighing, with a high cost and no anti-overturning design, and cannot handle the problem that the beehive tray accidentally overturns and cannot be weighed normally.

[0004] Therefore, it is necessary to improve the existing beehive weighing technology and specifically design a beehive weighing device for the beekeeping industry, which integrates functions such as stable weighing, anti-overturning, and anti-impurity, to improve labor efficiency and ensure the reliability of weighing data.

[0005] In the current field of beehive weighing technology, there are often problems such as the large overall weight and complex structure of beehive weighing equipment. These problems not only increase the operation difficulty for beekeepers but also raise the maintenance cost of the weighing equipment. At the same time, although the spherical support structure used in most weighing technology solutions can achieve stable weighing, due to the lack of reasonable limitation of the sphere, there is a risk that the sphere may fall out of the groove in case of accidents such as strong wind, vibration, and accidental collision, thus reducing the reliability of the weighing equipment in use. In addition, some high-precision weighing solutions rely on three cantilever beam weighing sensors to improve measurement repeatability and reduce lateral force interference, but their practicality is limited due to high costs and insufficient consideration of anti-overturning design. Finally, some technical solutions lack effective protection for sensors, and impurities such as honey and sewage are likely to remain on the sensors during long-term use, which not only interferes with the accuracy of the weighing results but also shortens the service life of the sensors. Summary of the Invention

[0006] In view of the deficiencies in the above beehive weighing technology, an intelligent beehive weighing device integrating stable weighing, anti-overturning, and anti-impurity functions is proposed.

[0007] First, the modular design concept is adopted to integrate the main weighing unit and the protection device into one, and the overall weight is reduced and the volume is minimized through optimized structural design, facilitating installation and maintenance by users. Second, the hemispherical structure is used to replace the traditional spherical structure, which not only retains the stable support characteristics of the spherical structure but also avoids the risk of the sphere falling out of the groove. At the same time, using the principle of triangular stable support, an innovative structural design of three-point support of the hemispherical structure is introduced to enhance the stability of the weighing center of gravity. Then, an anti-overturning mechanism composed of three springs symmetrically distributed with the three-point support of the hemispherical structure is added, so that the normal weighing function can be maintained even in case of accidents, greatly improving the overall stability. Next, a special protective cover is designed to protect the weighing sensor from the influence of external environmental factors, extending its service life and maintaining the accuracy of the weighing results. Finally, on the premise of ensuring weighing accuracy, components and technologies with high cost performance are selected to reduce the production cost, enabling more beekeeping practitioners to afford this technology, thus promoting the healthy development of the entire industry.

[0008] To solve the above technical problems, a technical solution adopted by the present invention is: A beehive weighing device with an anti-overturning function, comprising a base, a cantilever beam weighing sensor fixedly arranged on the top surface of the base, a tray fixedly arranged on the top of the load-bearing end of the cantilever beam weighing sensor, and a weighing pan movably arranged above the tray. The beehive to be weighed is placed on the top surface of the weighing pan. The centroid connection line formed by the centroid of the weighing pan and the centroid of the tray coincides with the center line of the load-bearing end of the cantilever beam weighing sensor. Three hemispherical support points evenly distributed around the centroid connection line are arranged on the bottom surface of the weighing pan, and arc-shaped grooves matching each hemispherical support point are formed on the top surface of the tray. Three springs vertically arranged and evenly distributed around the centroid connection line are connected between the bottom surface of the weighing pan and the top surface of the base, and each spring applies the same initial pre-tightening force. ; A foldable bellows protective cover is further arranged between the bottom surface of the base and the contour edge of the weighing pan.

[0009] Furthermore, a cushion block is fixedly connected between the top surface of the base and the bottom surface of the cantilever beam weighing sensor, and a connecting seat is fixedly connected between the top surface of the load-bearing end of the cantilever beam weighing sensor and the bottom surface of the tray, and the centroid of the connecting seat is located on the centroid connection line.

[0010] Furthermore, the tray is a regular triangular plate structure, and the three arc-shaped grooves are respectively located at the three sharp corners of the regular triangle, and the weighing pan is a disc structure.

[0011] Furthermore, the radius of the arc-shaped groove is larger than the radius of the hemispherical support point, and the surface of the hemispherical support point is in rolling contact with the surface of the arc-shaped groove.

[0012] Furthermore, the vertical distance between the spring and the centroid connection line is not less than the vertical distance between the hemispherical support point and the centroid connection line.

[0013] Furthermore, the actual pre-tightening force of the spring , where , is the total mass at the top of the load-bearing end of the cantilever beam weighing sensor, is the acceleration due to gravity, .

[0014] Furthermore, the external thrust in any direction when the beehive does not overturn ranges from: ; wherein, is the equivalent total mass borne by the top of the hemispherical support point, is the acceleration due to gravity, is the external thrust and the included angle between the horizontal plane, The angle of inclination of the weighing pan under the action of an external thrust under the action of an external thrust

[0015] Furthermore, a filtering module is provided at the signal output end of the cantilever beam weighing sensor, and this filtering module is used to filter out the weighing fluctuation signals under the action of non-persistent external thrusts under the action of an external thrust

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. In the present invention, a hemispherical shape and an arc-shaped groove are used in combination between the weighing pan and the tray to form a movable support point. The three movable support points are evenly distributed around the load-bearing end of the cantilever beam weighing sensor. Through a simple structure, the weighing center is stably located on the center line of the load-bearing end of the cantilever beam weighing sensor, ensuring a stable weighing function; 2. In the present invention, the anti-overturning function is realized through three anti-overturning springs evenly distributed around the hemispherical structure. Each spring is set with an initial pre-tightening force and is matched with the three-point movable support structure of the three groups of hemispherical support points and arc-shaped groove structures. When the beehive encounters external thrusts such as wind force and vibration, if the external thrust does not exceed the designed maximum external thrust, the static friction force provided by the groove and the horizontal component of the pressure can effectively prevent the horizontal displacement of the tray and prevent the weighing pan from accidentally overturning, ensuring that the system is in a static equilibrium state and does not affect the normal weighing of the beehive; 3. In the present invention, a foldable bellows protective cover is provided between the weighing pan and the base, which can realize the functions of waterproofing and dustproofing, protect the weighing sensor from the influence of external environmental factors, extend the service life of the weighing equipment, and will not have an adverse impact on the normal weighing function; 4. In the present invention, by analyzing the characteristics of the external thrust, a signal processing method is adopted to filter out or reduce the weighing fluctuations caused by non-persistent external thrusts during this period, greatly improving the reliability and accuracy of the weighing equipment in various environments and providing a stable operation platform for beekeeping; 5. The present invention adopts the modular design concept, integrates the main weighing unit and the protection device into one, and reduces the overall weight and volume through optimized structural design, facilitating installation and maintenance by users. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a front view structural schematic diagram of the beehive weighing equipment of the present invention in a state without a protective cover; Figure 2 is a side view structural schematic diagram of the beehive weighing equipment of the present invention in a state with a protective cover; Figure 3 is a schematic diagram of the hemispherical support structure of the beehive weighing equipment of the present invention; Figure 4Schematic diagram of the comprehensive center of gravity of the beehive weighing device of the present invention in the normal weighing state; Figure 5 Schematic diagram of the comprehensive center of gravity of the beehive weighing device of the present invention in the state where the center of gravity of the beehive is offset; Figure 6 Is an arbitrary external thrust Schematic diagram of the orthogonal decomposition of in the space coordinate system; Figure 7 Is the external thrust Force analysis diagram at the hemispherical support point when is inside the support triangle; Figure 8 Is the external thrust Force analysis diagram at the hemispherical support point when is outside the support triangle; Figure 9 Functional block diagram of the weighing system of the beehive weighing device of the present invention.

[0018] In the figure: 1, base; 2, cushion block; 3, cantilever beam load cell; 4, connecting seat; 5, tray; 6, weighing pan; 7, upper spring hook; 8, spring; 9, protective cover. Specific embodiments

[0019] The following elaborates on the preferred embodiments of the present invention in conjunction with the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making the protection scope of the present invention more clearly defined.

[0020] It should be noted that when a component is referred to as "mounted on" another component, it can be directly on the other component or there may also be an intermediate component. When a component is considered to be "disposed on" another component, it can be directly disposed on the other component or there may be an intermediate component at the same time. When a component is considered to be "fixed to" another component, it can be directly fixed to the other component or there may be an intermediate component at the same time.

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present invention belongs. The terms used in the description of the present invention in this specification are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "or / and" used herein includes any and all combinations of one or more of the related listed items.

[0022] See attached Figures 1 to 9, A beehive weighing device with an anti-overturning function, comprising a base 1, a cantilever beam weighing sensor 3 fixedly arranged on the top surface of the base 1, a tray 5 fixedly arranged on the top of the load-bearing end of the cantilever beam weighing sensor 3, and a weighing pan 6 movably arranged above the tray 5. The beehive to be weighed is placed on the top surface of the weighing pan 6. The centroid connection line formed by the centroid of the weighing pan 6 and the centroid of the tray 5 coincides with the center line of the load-bearing end of the cantilever beam weighing sensor 3. Three hemispherical support points evenly distributed around the centroid connection line are arranged on the bottom surface of the weighing pan 6, and arc-shaped grooves matching each hemispherical support point are formed on the top surface of the tray 5.

[0023] In this embodiment, for the convenience of the processing and manufacturing of the tray 5 and the weighing pan 6 and the determination of the centroid positions of the two and the coincidence of the vertical position projections, both the tray 5 and the weighing pan 6 are designed as regular shapes. Specifically, the tray 5 is a regular triangular plate structure, and the three arc-shaped grooves are respectively located at the three sharp corners of the regular triangle. The weighing pan 6 is a disc structure. In this way, the centroids of the tray 5 and the weighing pan 6 can be both located at their respective center positions. If they are arranged vertically up and down at the center positions, their central axes will coincide, which can meet the requirement of the centroid connection line being vertically arranged. At the same time, the central axis positions of the three hemispherical support points on the bottom surface of the weighing pan 6 and the three arc-shaped grooves on the top surface of the tray 5 can also be easily determined, that is, the point where the central axis of each arc-shaped groove intersects the top surface of the tray 5 is located on the angular bisector of the corresponding sharp corner position. The three points where the central axes of the three arc-shaped grooves intersect the top surface of the tray 5 are sequentially connected to form a regular triangle, and the three side lines of this regular triangle are respectively equidistant and parallel to the three contour edge lines of the tray 5. Hereinafter, this regular triangle is called the support triangle, and the corresponding side length is b. The central axis positions of the three hemispherical support points on the bottom surface of the weighing pan 6 respectively coincide with the three central axes of the arc-shaped grooves, so as to determine the positions. Preferably, the radius of the arc-shaped groove is greater than the radius of the hemispherical support point, and the surface of the hemispherical support point is in rolling contact with the surface of the arc-shaped groove, as Figure 3 shown. In this way, through the rolling cooperation between the hemispherical surface at the bottom of the hemispherical support point and the arc-shaped concave surface of the arc-shaped groove, a stable three-point support structure can be realized, and the weighing pan 6 can have the freedom of tilting and rotating on the top surface of the tray 5 while maintaining the contact between the hemispherical surface and the arc-shaped concave surface to provide support.

[0024] To meet the requirements of the assembly of the bottom end of the cantilever beam load cell 3 on the top surface of the base 1 and the assembly of the top end of the load-bearing end of the cantilever beam load cell 3 on the bottom surface of the tray 5, reduce the finish machining amount of the top surface of the base 1 and the bottom surface of the tray 5, and at the same time facilitate the adjustment of the vertical distance between the bottom surface of the tray 5 and the top surface of the base 1, a spacer 2 is fixedly connected between the top surface of the base 1 and the bottom surface of the cantilever beam load cell 3, and a connecting seat 4 is fixedly connected between the top surface of the load-bearing end of the cantilever beam load cell 3 and the bottom surface of the tray 5. In this embodiment, both the spacer 2 and the connecting seat 4 adopt a disc-shaped structure. A counterbore is provided on the bottom surface of the tray 5 that matches the contour of the top surface of the connecting seat 4, and the top end of the connecting seat 4 is embedded in this counterbore. Three connecting screws are provided inside the bottom of the load-bearing end of the cantilever beam load cell 3, and the threaded ends of these three screws sequentially pass through the load-bearing end of the cantilever beam load cell 3 and the connecting seat 4 and are threadedly connected to the bottom surface of the tray 5; a counterbore is provided on the top surface of the base 1 that matches the contour of the bottom surface of the spacer 2, and the bottom end of the spacer 2 is embedded in this counterbore. Two connecting screws are provided at the bottom end of the non-load-bearing end of the cantilever beam load cell 3, and the threaded sections of these two screws sequentially pass through the non-load-bearing end of the cantilever beam load cell 3 and the spacer 2 and are threadedly connected to the top surface of the base 1. Preferably, to ensure that the centers of mass of each component (connecting seat 4, weighing pan 6, and tray 5) above the load-bearing end of the cantilever beam load cell 3 are all located on the center line of the load-bearing end of the cantilever beam load cell 3, the connecting seat 4 and the weighing pan 6 are coaxially arranged, and the three screws used for the connection there are evenly distributed around the vertical axis of the connecting seat 4.

[0025] Three springs 8 that are vertically arranged and evenly distributed around the center-of-mass connection line are connected between the bottom surface of the weighing pan 6 and the top surface of the base 1, and each spring 8 applies the same initial pre-tightening force . Specifically, three upper spring hooks 7 are fixedly provided on the bottom surface of the weighing pan 6, and the three upper spring hooks 7 are evenly distributed around the central axis of the weighing pan 6, that is, the three intersection points formed by the central axes of the three upper spring hooks 7 and the bottom surface of the weighing pan 6 are sequentially connected to form an equilateral triangle. Hereinafter, this equilateral triangle is called the pre-tightening triangle, and the corresponding side length is a. The center of mass of the pre-tightening triangle and the aforementioned support triangle is located within the same vertical line, and the three sharp corners are arranged in the opposite direction to the three sharp corners of the support triangle. To make the overall structure have a better anti-overturning effect, the vertical distance between the spring 8 and the center-of-mass connection line is not less than the vertical distance between the hemisphere support point and the center-of-mass connection line, that is, correspondingly a is greater than b.

[0026] On the top surface of the base 1, three lower spring hooks are provided in pairs with the three upper spring hooks 7. Both ends of the spring 8 are respectively hung on the upper spring hook 7 and the lower spring hook of the same group. For the convenience of the assembly of the spring 8 and the adjustment of the initial pre-tightening force of the spring 8, in this embodiment, preferably, both the upper spring hook 7 and the lower spring hook are circular ring welding bars made of 304 stainless steel. Threaded holes are respectively opened on the bottom surface of the weighing pan 6 and the top surface of the base 1 in an upper and lower paired manner. The upper spring hook 7 and the lower spring hook are respectively threadedly connected to the bottom surface of the weighing pan 6 and the top surface of the base 1. In this way, by adjusting the depth of the threaded connection, the stretching length of the spring 8 can be correspondingly adjusted, so as to realize the adjustment and setting of the initial pre-tightening force. By adjusting the axial heights of the cushion block 2 and the connecting seat 4, the vertical distance between the bottom surface of the weighing pan 5 and the top surface of the base 1 can be adjusted to meet the requirement of the assembly length of the spring 8.

[0027] The stable weighing function, anti-overturning function and protection function of the beehive weighing device will be elaborated respectively below.

[0028] (I) Stable weighing function: The beehive is placed on the weighing pan 6, and three hemispherical support points below the weighing pan 6 are used to ensure stable support, as Figure 3 shown. The weight to be weighed is loaded on the weighing end of the cantilever beam weighing sensor 3, and the weighing is carried out by demodulating the deformation amount of the cantilever beam. The spring 8 has a known initial pre-tightening force , which further ensures that the overall structure is more stable.

[0029] Under ideal conditions, the center of gravity of the beehive is located on the above-mentioned centroid connection line. Taking the horizontal plane where the three support points in contact with the three groups of curved surface points are located as the coordinate plane and the intersection point of the centroid connection line and the coordinate plane as the origin , a plane coordinate system is established , where the axis is parallel to the connection line of two of the support points, as Figure 4 shown. At this time, the centers of gravity of the beehive, the weighing pan 6, the tray 5 and the connecting seat 4 coincide, and the total weight is denoted as . The pre-tightening force of each spring 8 is , where except that the weight of the beehive will change with the number of bees and the amount of honey in the honeycomb, the masses of the other fixed components remain unchanged. At the same time, the pre-tightening force of the spring 8 is also finally loaded on the bearing end of the cantilever beam weighing sensor 3, and the equivalent total mass obtained by measuring with the cantilever beam sensor is denoted as , and there is (1) is the acceleration due to gravity, and the same applies hereinafter. Since the cantilever beam sensor 3, the tray 5, the weighing pan 6, and the base 1 are fixedly supported during the weighing process, the deformation of the cantilever beam sensor 3 is very small and can be ignored. At this time, it can be considered that the vertical distance between the weighing pan 6 and the base 1 remains unchanged, that is, the pre-tightening force of the spring remains unchanged. When the weight of the beehive changes causes to become , the actual equivalent total mass obtained by the weighing sensor is , and there is (2) It can be seen from formulas (1) and (2) that the change in the weight of the beehive corresponds one-to-one with the weighing result of the cantilever beam sensor 3. Therefore, under ideal conditions, the weighing device can provide accurate and stable weighing results.

[0030] When the initial placement position of the beehive is offset or the internal mass distribution is uneven during the weighing process, resulting in the center of gravity of the beehive not being at the origin point, the comprehensive center of gravity position is as Figure 5 shown. If the comprehensive center of gravity is within the boundary of the support triangle, the three hemispherical support points can still provide effective support for the weighing pan 6, and at this time the weighing pan 6 remains unchanged. If the comprehensive center of gravity exceeds the boundary of the support triangle, the hemispherical support structure may not be able to provide effective support, manifested as the weighing pan 6 tilting and deflecting relative to the load-bearing point will occur.

[0031] Assume that the current initial center of gravity position is . The offset of the weighing pan causes the pre-tightening force of each spring to change accordingly. The actual pre-tightening forces of the 3 springs 8 are respectively , and , and they are no longer equal, but form a moment balance state with the gravity relative to the point. Decompose the moment into the axis and the axis respectively, then there is (3) Solving formula (3) gives (4) Since the position of the center of gravity can only be within the pre-tightening triangle (side length a) on the weighing pan 6, that is (5) Therefore, the value range of the pre-tightening force of each spring can be obtained as follows (6) Also, since the spring tensions can only play the role of stabilizing the center of gravity when they are greater than 0, the initial pre-tension of spring 8 can be obtained The value range of is: Therefore, when the initial pre-tensions of the springs 8 satisfy formula (7), this weighing device has the function of stabilizing the weighing center of gravity and to a certain extent preventing the weighing tray from tipping over due to internal factors of the beehive.

[0032] (II) Anti-tipping function: The anti-tipping function of the present invention is achieved by using the pre-tensions of three springs 8 distributed in an equilateral triangle. The equivalent center of gravity of the whole formed by the three springs 8 is concentrated on the load-bearing end of the cantilever beam weighing sensor 3, and together with the three-point support structure, it forms a hexagonal structure in the top view, as Figure 4 and Figure 5 shown. Each spring has an initial pre-tension , providing additional stability for the beehive weighing device.

[0033] If the beehive is subjected to external forces in any direction due to factors such as wind, vibration, and accidental human contact, it is equivalent to receiving an external thrust at an arbitrary inclination angle at point on the plane where the weighing plate 6 is located. Taking as the origin, two mutually perpendicular directions on the horizontal plane passing through are the axis and axis, and the direction perpendicular to the upward direction passing through is the axis, establishing a space coordinate system . In this space coordinate system, the external thrust is decomposed into a plane component (on the plane) and a vertical component (in the same direction as the gravity), as Figure 6 shown. Expressed by the formula as: (8) When point is inside the support triangle (side length b), the external thrust may only cause the offset of the overall center of gravity of the beehive. The hemispherical support point contacts the bottom of the groove. The pose and force state at this time are as Figure 7 shown. Let the overall equivalent mass of the beehive and the weighing plate 6 be . Analyzing from the whole, the support force at the hemispherical support point is equivalently sized as: (9) In order to eliminate the influence of the symmetric weighing device, the frictional force should be greater than or equal to , that is (10) Combining formulas (7), (8), (9) and (10), the range of the external thrust that the weighing device can withstand when it is within the support triangle can be deduced, that is (11) where is the equivalent total mass borne at the top of the hemispherical support point, is the acceleration due to gravity, is the external thrust and the included angle between the horizontal plane.

[0034] When the point is outside the support triangle (with side length b), in the plane, since the weighing pan 6 tilts in the direction opposite to the external thrust , the hemispherical support point deflects in the groove. The pose and force state at this time are as shown in Figure 8 . Analyzing from the overall perspective, the support force at the hemispherical support point at this time, and its magnitude is equivalent to: (12) The horizontal component force of on the plane is in the opposite direction to , and can offset to a certain extent. At the same time, the frictional force generated at the support contact point will also hinder the tilting of the weighing pan 6. Through force analysis, it can be obtained that: In order to eliminate the influence of on the weighing device, it is necessary to satisfy that the sum of the horizontal component force of the frictional force and the horizontal component force of the support force is greater than (14) Combining formulas (7), (8), (12), (13) and (14), the range of the external thrust when the weighing device is outside the support triangle can be deduced, that is (15) where is the equivalent total mass borne by the top of the hemispherical support point, is the acceleration due to gravity, is the external thrust is the angle between and the horizontal plane, is the angle of inclination of the weighing pan 6 under the action of the external thrust

[0035] Combining the above two cases, the present invention can eliminate the influence of the external thrust satisfying that the corresponding horizontal component force value is less than or equal to , and the groove can appropriately adjust the position of the hemisphere to prevent the weighing device from tipping over due to rotation.

[0036] In terms of weighing, is the component of the external thrust in the direction of gravity, and its position is arbitrary. The force analysis at this time is equivalent to adding a gravity that may affect the center of gravity position of the beehive on the basis of the original weighing. The output value of the weighing sensor, that is, the actual equivalent total mass, is and the actual pre-tightening forces of each spring 8, and will also change accordingly. As long as the pre-tightening force value of the spring 8 is not less than zero, the structure of the current weighing device can remain stable.

[0037] Since the existence of the external thrust will cause the weighing result not to reflect the true weight of the beehive, and the external thrust is generally generated at a certain moment or in a short period of time, the weighing fluctuation caused by the non-persistent external thrust during this period can be filtered or reduced by analyzing the characteristics of the external thrust and adopting signal processing methods. So that in the case of non-persistent external thrust, the current technical solution can still accurately weigh. Therefore, in the beehive weighing device of the present invention, a filtering module is provided at the signal output end of the cantilever beam weighing sensor 3, and the filtering module is used to filter the weighing fluctuation signal under the action of the non-persistent external thrust .

[0038] As Figure 9 shown, the implementation process of the weighing function of the beehive weighing device of the present invention is as follows: The weight change of the beehive causes corresponding deformation at the load-bearing end of the cantilever beam weighing sensor 3. This physical change of the deformation of the sensor is converted into an analog signal. The analog signal is first linearly amplified by an amplifier, then the non-persistent abnormal signals are filtered out by a low-pass filter, and then quantized and converted into corresponding digital signals by an ADC analog-to-digital converter. Finally, the microcontroller receives the digital signal and displays the mass of the beehive on the display screen. The specific structures of the electrical components and circuit connections involved in the above weighing process all adopt existing technologies and will not be elaborated here.

[0039] (III) Protection function: A foldable bellows protective cover 9 is also provided between the bottom surface of the base 1 and the contour edge of the weighing pan 6. The protective cover is easy to install, can stretch freely, is easy to clean, will not affect the force distribution of the weighing pan 6, and can also prevent water, dust and other impurities to a certain extent, extending the service life of the beehive weighing device.

[0040] The beehive weighing device provided by the present invention realizes the anti-tipping function through three anti-overturning springs evenly distributed around the hemispherical structure. Each spring is set with an initial pre-tightening force to ensure that the system is in a static equilibrium state and does not affect the normal weighing of the beehive. When the beehive encounters external thrusts such as wind force and vibration, if the external thrust does not exceed the designed maximum external thrust, the static friction force provided by the groove and the horizontal component of the pressure can effectively prevent the horizontal displacement of the tray; at the same time, by analyzing the characteristics of the external thrust, signal processing methods are used to filter out or reduce the weighing fluctuations caused by the non-persistent external thrust during this period, greatly improving the reliability and accuracy of the weighing device in various environments and providing a stable operation platform for beekeeping.

[0041] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0042] The above is only the embodiment of the present invention, and does not limit the patent scope of the present invention accordingly. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, shall be included in the patent protection scope of the present invention by the same token.

Claims

1. A beehive weighing device with an anti-overturning function, characterized in that: It includes a base (1), a cantilever beam load cell (3) fixedly arranged on the top surface of the base (1), a tray (5) fixedly arranged on the top of the load-bearing end of the cantilever beam load cell (3), and a weighing pan (6) movably arranged above the tray (5). The beehive to be weighed is placed on the top surface of the weighing pan (6). The centroid connection line formed by the centroid of the weighing pan (6) and the centroid of the tray (5) coincides with the center line of the load-bearing end of the cantilever beam load cell (3). Three hemispherical support points evenly distributed around the centroid connection line are arranged on the bottom surface of the weighing pan (6), and arc-shaped grooves matching each hemispherical support point are formed on the top surface of the tray (5). There are three springs (8) vertically connected between the bottom surface of the weighing pan (6) and the top surface of the base (1), which are evenly distributed around the centroid connection line. Each spring (8) exerts the same initial pre-tightening force ; A foldable bellows protective cover (9) is further arranged between the bottom surface of the base (1) and the contour edge of the weighing pan (6).

2. The beehive weighing device with an anti-overturning function according to claim 1, characterized in that: A cushion block (2) is fixedly connected between the top surface of the base (1) and the bottom surface of the cantilever beam load cell (3), and a connecting seat (4) is fixedly connected between the top surface of the load-bearing end of the cantilever beam load cell (3) and the bottom surface of the tray (5), and the centroid of the connecting seat (4) is located on the centroid connection line.

3. The beehive weighing device with anti-overturning function according to claim 1, characterized in that: The tray (5) is a regular triangular plate structure, and the three arc-shaped grooves are respectively located at the three sharp corners of the regular triangle. The weighing pan (6) is a disc structure.

4. The beehive weighing device with an anti-overturning function according to claim 1, characterized in that: The radius of the arc-shaped groove is larger than the radius of the hemispherical support point, and the surface of the hemispherical support point is in rolling contact with the surface of the arc-shaped groove.

5. The beehive weighing device with an anti-overturning function according to any one of claims 1 to 4, characterized in that: The vertical distance between the spring (8) and the centroid connection line is not less than the vertical distance between the hemispherical support point and the centroid connection line.

6. The beehive weighing device with an anti-overturning function according to claim 5, characterized in that: The actual pre-tightening force of the spring (8) , where , is the total mass at the top of the load-bearing end of the cantilever beam load cell (3), is the acceleration due to gravity, .

7. The beehive weighing device with an anti-overturning function according to claim 5, characterized in that: The external thrust in any direction that the beehive does not overturn The range is as follows: ； wherein, is the equivalent total mass borne by the top of the hemispherical support point, is the acceleration due to gravity, is the external thrust and the included angle between the horizontal plane, is under the external thrust The angle at which the weighing pan (6) tilts under the action.

8. The beehive weighing device with an anti-overturning function according to claim 7, characterized in that: A signal output end of the cantilever beam load cell (3) is provided with a filtering module, and the filtering module is used for filtering out weighing fluctuation signals under the action of non-persistent external thrusts. ​

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