Anti-interference strain weighing module not affected by humidity

Abstract

This utility model discloses an anti-interference strain gauge weighing module that is resistant to humidity, relating to the field of weighing module technology. It includes a first connecting seat, a second connecting seat, an assembly groove, an assembly hole, and a fourth connecting seat. A protective mechanism is disposed above the first connecting seat. The protective mechanism includes an outer protective cover, a gasket, a protective cover, spoke heads, and a hopper. The hopper is disposed on the inner wall of the outer protective cover, the spoke heads are disposed inside the outer protective cover, the gasket is disposed above the outer protective cover, and the protective cover is installed above the gasket. The electromagnetic shielding coating on the inner wall of the outer protective cover can block external electromagnetic interference, ensuring the stable operation of the internal core components. The hopper, with its arc-shaped grid structure, can stably place the desiccant and ensure a moisture absorption range, effectively absorbing moisture inside the outer protective cover and preventing moisture from affecting the performance of the strain gauges and chip boards, thus achieving a humidity-resistant function.

Description

Technical Field

[0001] This utility model relates to the field of weighing module technology, specifically to an anti-interference strain-type weighing module that is resistant to humidity effects. Background Technology

[0002] Strain gauge weighing modules are core components in the field of weighing technology for weight detection and data feedback. They typically consist of a connector, a force sensing component, a signal processing component, and a protective structure. Their working principle is as follows: strain gauges sense the minute deformation of the force-bearing component under the action of weight, convert the deformation signal into an electrical signal, and then process it through a chip to output accurate weighing data. They are widely used in industrial production, logistics warehousing, food processing, and other scenarios, providing reliable data support for key processes such as weight measurement and load monitoring. The technical solution of the application CN98240618.5, entitled "A Weighing Sensor", involves attaching resistance strain gauges to both sides of a double shear beam and dividing them into four groups according to their positional relationship. These groups serve as the four arms of a Wheatstone bridge, forming one or more Wheatstone bridge circuits to create a weighing sensor. This sensor has the advantages of being easy to carry and having high measurement accuracy. However, it has significant shortcomings in environmental adaptability: relying solely on a sealing diaphragm to isolate external moisture cannot handle moisture that may remain inside the module. In high-humidity environments, residual moisture easily adheres to the surface of the strain gauges, leading to a decrease in strain gauge sensitivity and affecting the stability and data accuracy of the sensor during long-term operation. Based on this, this solution proposes "an anti-interference strain gauge weighing module that is resistant to humidity" to address the above problems. Summary of the Invention

[0003] The purpose of this invention is to provide an anti-interference strain gauge weighing module that is resistant to humidity, in order to solve the problem mentioned in the background art that existing market equipment cannot handle the moisture that may remain inside the module.

[0004] To achieve the above objectives, this utility model provides the following technical solution: an anti-interference strain gauge weighing module that is resistant to humidity, comprising a first connecting seat, a second connecting seat, an assembly groove, an assembly hole, and a fourth connecting seat; A protective mechanism is provided above the first connecting seat. The protective mechanism includes an outer protective cover, a gasket, a protective cover, a spoke head, and a cover bucket. The cover bucket is disposed on the inner wall of the outer protective cover, the spoke head is disposed inside the outer protective cover, the gasket is disposed above the outer protective cover, and the protective cover is installed above the gasket.

[0005] As a preferred technical solution of this utility model, the surface of the first connecting seat is provided with four mounting holes arranged in a rectangular pattern, and a threaded bolt is connected above the first connecting seat. The upper end of the bolt passes through the second connecting seat. An mounting groove is provided on the side of the second connecting seat, and a movable bolt is connected in the mounting groove. The surface of the second connecting seat is provided with mounting holes, and the mounting holes of the second connecting seat correspond to the mounting holes of the first connecting seat. Using the above technical solution, four rectangularly distributed assembly holes are opened on the surface of the first connector, which correspond to the assembly holes of the second connector. This design can quickly realize the installation and positioning of the first and second connectors, significantly shortening the assembly time and improving the overall assembly efficiency of the module. At the same time, the assembly groove on the side of the second connector allows the bolts to move in the groove, so that the relative position of the second connector and the first connector can be flexibly adjusted during the installation process. This can adapt to the dimensional deviations under different installation scenarios, effectively enhancing the flexibility and applicability of module installation and avoiding the problem of being unable to assemble normally due to installation space limitations.

[0006] As a preferred technical solution of this utility model, the outer cover is fixed to the upper surface of the first connecting seat by bolts, the connecting line is vertically fixed to the side of the outer cover, and the inner wall of the outer cover is sprayed with electromagnetic shielding coating. Using the above technical solution, the first connecting seat fixes the outer cover with bolts. This fixing method not only ensures a stable connection, making it difficult for the outer cover to loosen during module operation, but also provides detachability. When the outer cover is damaged or internal components need maintenance, the outer cover can be removed simply by unscrewing the bolts, without replacing the entire weighing module, significantly reducing maintenance costs and difficulty. In addition, the electromagnetic shielding coating sprayed on the inner wall of the outer cover can effectively block external electromagnetic signals from entering the interior of the outer cover, avoiding the impact of electromagnetic interference on core components such as internal strain gauges and chip boards, ensuring the accuracy of weighing data acquisition and processing, and greatly improving the module's anti-electromagnetic interference capability.

[0007] As a preferred technical solution of this utility model, the spoke head is fixedly connected to the inner wall of the outer protective cover. The spoke head is a cylindrical structure, and the top of the spoke head is a threaded tube structure. Four spokes are fixedly connected to the side of the spoke head. Strain gauges are glued to the side of the spoke head. The strain gauges cover both sides of the spokes of the spoke head, and a total of eight strain gauges are evenly distributed. Using the above technical solution, the spoke head adopts a cylindrical structure, which provides a stable support foundation for the four spokes on the side, ensuring that the spokes are not easily deformed under weighing load. The threaded tube structure at the top provides a reliable connection method for subsequent connection with the cap, taking into account both structural stability and connection convenience. At the same time, eight evenly distributed strain gauges are glued to the side of the spoke head, and the strain gauges cover both sides of the spokes. This design can simultaneously collect strain signals during the weighing process from multiple angles and multiple positions, effectively reducing the limitations of a single strain gauge signal acquisition, avoiding weighing errors caused by the lack of local strain signals, significantly improving the comprehensiveness and accuracy of the weighing data, and ensuring that the module can accurately feed back the weighing results.

[0008] As a preferred technical solution of this utility model, the inner wall of the outer protective cover is fixedly connected to the chip board, the chip board is connected to the strain gauge, and there are two symmetrically distributed chip boards. The inner wall of the outer protective cover is fixedly connected to the hopper, the hopper is an arc-shaped grid structure, and the hopper is used to place desiccant. The above technical solution involves fixing two symmetrically distributed chip boards to the inner wall of the outer casing, with the chip boards connected to the strain gauges. This dual-chip board design allows for dual processing and mutual verification of the strain signals acquired by the strain gauges. If one chip board fails, the other chip board can still function normally and correct the data, significantly reducing the risk of weighing data errors due to a single chip board failure and improving the reliability and stability of the module. In addition, the casing uses an arc-shaped grid structure, which not only stably places the desiccant and prevents it from shifting during module operation, but also ensures that the desiccant has full contact with the air inside the outer casing, maximizing the desiccant's moisture absorption range and effectively absorbing moisture inside the outer casing. This prevents moisture from corroding the strain gauges, chip boards, and other components, thus avoiding performance degradation or damage and effectively achieving the module's function of preventing humidity-related issues.

[0009] As a preferred technical solution of this utility model, the top of the spoke head is threadedly connected to the cap, and a limiting groove is opened at the center line position of the bottom surface of the second connecting seat, and the cap is engaged in the limiting groove; Using the above technical solution, the top of the spoke head is connected to the cap via a threaded connection. The threaded connection method is simple to operate and facilitates the installation and removal of the cap. When maintenance or repair of the spoke head or the strain gauge on its side is required, the cap can be unscrewed for operation without disassembling other complex structures of the module, significantly improving the convenience of maintenance. At the same time, the limiting groove at the center line of the bottom surface of the second connecting seat engages with the cap. This engaging structure can accurately limit the relative position of the second connecting seat and the spoke head, preventing the second connecting seat from shifting due to vibration or force during the weighing process, thereby avoiding weighing data deviation caused by structural offset, effectively ensuring the stability of the module structure and the accuracy of the weighing results.

[0010] As a preferred technical solution of this utility model, an assembly groove is opened on the right side of the third connecting seat. The assembly groove has a straight structure and a pair of bolts are movably connected in the assembly groove. The bottom of the bolts is threadedly connected to the fourth connecting seat. An outer protective cover is sandwiched between the fourth connecting seat and the left side of the third connecting seat. By adopting the above technical solution, the straight mounting groove on the right side of the third connector allows a pair of bolts to move within the groove. This design enables the spacing between the third and fourth connectors to be flexibly adjusted according to the actual size of the outer cover during installation, ensuring that the outer cover can be stably clamped and avoiding the problem of not being able to be firmly fixed due to slight deviations in the size of the outer cover. At the same time, the fourth connector clamps the outer cover from the left side with the third connector. The connection stability between the outer cover and the connector is further enhanced by the clamping and fixing method on both sides, preventing the outer cover from loosening or shifting during the use of the module. This ensures that the outer cover continues to effectively protect the internal core components, significantly improving the overall structural robustness and reliability of the module.

[0011] Compared with the prior art, the beneficial effects of this utility model are: The first and second connectors have corresponding mounting holes, enabling quick positioning and assembly. Combined with the mounting slot of the movable bolt on the side of the second connector, the relative position of the two connectors can be flexibly adjusted to accommodate dimensional deviations in different installation scenarios. The straight mounting slot of the third connector allows for bolt position adjustment, making it easy to adapt the spacing between the third and fourth connectors according to the actual size of the outer cover. This ensures stable clamping of the outer cover and significantly improves the module's adaptability and assembly flexibility in different installation environments. The first connecting seat secures the outer cover with bolts, ensuring a stable and detachable connection. When the outer cover is damaged, it can be replaced simply by removing the bolts, reducing maintenance costs. The electromagnetic shielding coating on the inner wall of the outer cover can block external electromagnetic interference, ensuring the stable operation of the internal core components. The arc-shaped grid structure of the cover can stably place the desiccant and ensure the moisture absorption range, effectively absorbing moisture inside the outer cover and preventing moisture from affecting the performance of the strain gauge and chip board, thus achieving a moisture-proof function. The screw-on cap at the top of the spoke head facilitates disassembly for maintenance of the spoke head and strain gauge. At the same time, the engagement of the cap with the limiting groove of the second connecting seat limits the relative position of the two components and prevents structural displacement. Eight strain gauges are evenly distributed on the side of the spoke head, covering both sides of the spoke. They can collect strain signals from multiple angles and positions, reducing the limitations of a single strain gauge and improving the comprehensiveness of the weighing data. Two symmetrically distributed chip boards, after being connected to the strain gauges, can perform dual processing and verification of the signals, reducing the risk of data errors caused by the failure of a single chip board and ensuring the accuracy of the weighing data and the reliability of the module. Attached Figure Description

[0012] Figure 1This is a side view of the structure of this utility model; Figure 2 This is a schematic diagram of the bolt and outer protective cover structure of this utility model; Figure 3 This is a front view structural diagram of the present invention; Figure 4 This is a schematic diagram of the outer protective cover and the cover structure of this utility model; Figure 5 This is a side view of the second connecting seat of this utility model; Figure 6 This is a schematic diagram of the gasket and protective cover structure of this utility model; Figure 7 This is a side view of the gasket structure of this utility model; Figure 8 This is a schematic diagram of the spoke head and strain gauge structure of this utility model; Figure 9 This is a schematic diagram of the outer protective cover and connecting line structure of this utility model; Figure 10 This is a side view of the structure of Embodiment 2 of this utility model; Figure 11 This is a front view structural diagram of Embodiment 2 of this utility model.

[0013] In the diagram: 1. First connecting seat; 2. Second connecting seat; 3. Assembly groove; 4. Assembly hole; 5. Bolt; 6. Outer cover; 7. Connecting wire; 8. Washer ring; 9. Protective cover; 10. Spoke head; 11. Strain gauge; 12. Chip board; 13. Cover; 14. Limiting groove; 15. Cover head; 16. Third connecting seat; 17. Fourth connecting seat. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0015] Please see Figure 1-11 The present invention provides a novel anti-interference strain gauge weighing module that is resistant to humidity. Example 1

[0016] For details, please refer to the following: Figure 1 - Figure 9It includes a first connecting seat 1, a second connecting seat 2, an assembly groove 3, an assembly hole 4, a bolt 5, an outer protective cover 6, a connecting wire 7, a gasket 8, a protective cover 9, a spoke head 10, a strain gauge 11, a chip board 12, a cover 13, a limiting groove 14, and a cover 15. A protective mechanism is configured above the first connecting seat 1. This mechanism includes an outer protective cover 6, a gasket 8, a protective cover 9, a spoke head 10, and a cover 13. The assembly relationship of each component is clear: the cover 13 is fixed to the inner wall of the outer protective cover 6, the spoke head 10 is built inside the outer protective cover 6, the gasket 8 is laid on the top of the outer protective cover 6, and the protective cover 9 is installed above the gasket 8, which together form the protective frame of the module. The surface of the first connecting seat 1 has four rectangularly distributed mounting holes 4, which are precisely aligned with the mounting holes 4 of the second connecting seat 2, enabling direct and rapid positioning of the two connecting seats and significantly shortening the installation and calibration time. At the same time, the side of the second connecting seat 2 is provided with a mounting groove 3 for the fitting bolt 5. After the bolt 5 passes through, it is threadedly connected to the first connecting seat 1 and can slide in the mounting groove 3, allowing for fine adjustment of the relative position during installation, adapting to different dimensional deviations in different scenarios, and solving the assembly problem in space-constrained areas. It is fixed to the upper surface of the first connecting seat 1 by bolts 5, which not only ensures that it is not easy to loosen during long-term operation and protects the internal components, but also allows the outer cover 6 to be removed by simply unscrewing bolts 5 when the outer cover 6 is damaged or the internal components need to be maintained, without having to replace the entire module, thus reducing maintenance costs and difficulty; in addition, the inner wall of the outer cover 6 is sprayed with electromagnetic shielding coating, which can block external electromagnetic signals and avoid interference with core components such as internal strain gauges 11 and chip boards 12, ensuring the accuracy of weighing data acquisition and processing; The spoke head 10, which has a fixed column structure on the inner wall of the outer protective cover 6, can provide stable support for the four spokes that are evenly distributed on the side, preventing deformation when under load. At the same time, the threaded tube structure at the top of the spoke head 10 provides an interface for connection with the cover head 15. Eight strain gauges 11 are also glued to the side of the spoke head 10, with strain gauges 11 covering both sides of each spoke. This allows for simultaneous acquisition of strain signals from multiple directions, avoiding the limitations of a single strain gauge 11, reducing weighing errors caused by missing local signals, and improving the comprehensiveness and accuracy of the data. Two symmetrical chip boards 12 are fixed to the inner wall of the outer protective cover 6. The chip boards 12 are connected to the strain gauges 11 through wiring, which can perform dual processing and cross-verification of the strain signals collected by the strain gauges 11. If one chip board 12 fails, the other chip board 12 can continue to work and correct the data, reducing the risk of weighing data errors. At the same time, an arc-shaped grid structure hopper 13 is also fixed to the inner wall of the outer protective cover 6. Desiccant is placed inside the hopper 13. The grid not only fixes the position of the desiccant to prevent displacement, but also increases its contact area with air, maximizing the moisture absorption range and preventing moisture from corroding the strain gauges 11 and chip boards 12, which may lead to performance degradation or damage. The top of the spoke head 10 is connected to the cover 15 by a thread, which is easy to operate. When maintaining the spoke head 10 or repairing the strain gauge 11, you only need to unscrew the cover 15, without disassembling other complex structures. The bottom center of the second connecting seat 2 has a limiting groove 14 that matches the cover 15. The cover 15 and the limiting groove 14 are engaged and connected, which can accurately limit the relative position of the second connecting seat 2 and the spoke head 10. This prevents the second connecting seat 2 from shifting due to vibration or force when the module is weighed, avoids the weighing data deviation caused by structural displacement, and ensures the stability and weighing accuracy of the module. Example 2

[0017] For details, please refer to the following: Figure 10 and Figure 11 The difference between this embodiment and the first embodiment is that: an assembly groove 3 is opened on the right side of the third connecting seat 16. The assembly groove 3 is a straight structure, and a pair of bolts 5 are movably connected in the assembly groove 3. The bottom of the bolts 5 is threadedly connected to the fourth connecting seat 17. An outer protective cover 6 is sandwiched between the fourth connecting seat 17 and the left side of the third connecting seat 16. The straight mounting groove 3 on the right side of the third connecting seat 16 allows a pair of bolts 5 to move within the groove. This design allows the distance between the third connecting seat 16 and the fourth connecting seat 17 to be flexibly adjusted according to the actual size of the outer cover 6 during installation, ensuring that the outer cover 6 can be stably clamped and avoiding the problem of not being able to be firmly fixed due to slight deviations in the size of the outer cover 6. At the same time, the fourth connecting seat 17 and the third connecting seat 16 clamp the outer cover 6 from the left side. The connection stability between the outer cover 6 and the connecting seat is further enhanced by the clamping and fixing method on both sides, preventing the outer cover 6 from loosening or shifting during the use of the module, ensuring that the outer cover 6 continues to effectively protect the internal core components, and significantly improving the overall structural robustness and reliability of the module.

[0018] This completes a series of tasks. The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0019] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An anti-interference strain gauge weighing module resistant to humidity, comprising a first connecting seat (1) and a third connecting seat (16); characterized in that: A protective mechanism is provided above the first connecting seat (1). The protective mechanism includes an outer cover (6), a gasket (8), a protective cover (9), a spoke head (10), and a cover (13). The cover (13) is located on the inner wall of the outer cover (6), the spoke head (10) is located inside the outer cover (6), the gasket (8) is located above the outer cover (6), and the protective cover (9) is installed above the gasket (8).

2. A moisture-impervious, tamper-resistant strain gauge weighing module according to claim 1, wherein, The first connecting seat (1) has four mounting holes (4) arranged in a rectangular shape. The first connecting seat (1) is connected to a threaded bolt (5) on top. The upper end of the bolt (5) passes through the second connecting seat (2). The second connecting seat (2) has a mounting groove (3) on its side. The mounting groove (3) is used to connect the bolt (5). The second connecting seat (2) has mounting holes (4) on its surface. The mounting holes (4) of the second connecting seat (2) correspond to the mounting holes (4) of the first connecting seat (1).

3. A moisture-affected interference-resistant strain gauge weighing module according to claim 2, characterized in that, The outer cover (6) is fixed to the upper surface of the first connecting seat (1) by bolts (5), the connecting line (7) is vertically fixed to the side of the outer cover (6), and the inner wall of the outer cover (6) is sprayed with electromagnetic shielding coating.

4. The anti-humidity-affected anti-interference strain gauge weighing module according to claim 3, characterized in that, The spoke head (10) is fixedly connected to the inner wall of the outer protective cover (6). The spoke head (10) is a cylindrical structure, and the top of the spoke head (10) is a threaded tube structure. Four spokes are fixedly connected to the side of the spoke head (10). Strain gauges (11) are glued to the side of the spoke head (10). The strain gauges (11) are covered on both sides of the spokes of the spoke head (10), and there are eight strain gauges (11) evenly distributed.

5. A moisture-affected, tamper-resistant strain gauge weighing module according to claim 4, wherein, The inner wall of the outer cover (6) is fixedly connected to the chip board (12), the chip board (12) is connected to the strain gauge (11), and there are two symmetrically distributed chip boards (12). The inner wall of the outer cover (6) is fixedly connected to the hopper (13), the hopper (13) is an arc-shaped grid structure, and the hopper (13) is used to place desiccant.

6. A moisture-affected, tamper-resistant strain gauge weighing module according to claim 5, wherein, The top of the spoke head (10) is threaded to the cap (15), and a limiting groove (14) is opened at the center line of the bottom surface of the second connecting seat (2), and the cap (15) is engaged in the limiting groove (14).

7. A moisture-impervious, tamper-resistant strain gauge weighing module according to claim 1, wherein, The third connecting seat (16) has an assembly groove (3) on its right side. The assembly groove (3) is a straight structure, and a pair of bolts (5) are movably connected in the assembly groove (3). The bottom of the bolts (5) is threadedly connected to the fourth connecting seat (17). An outer protective cover (6) is sandwiched between the fourth connecting seat (17) and the third connecting seat (16) on the left side.

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