A damping matching mechanism for a load cell

Abstract

The utility model discloses a kind of damping matching mechanism of load cell, including base, the inside one side of base is provided with mounting cavity, line board is fixedly installed in the inside of mounting cavity;Cantilever load cell, the cantilever load cell is fixedly installed on base upper surface one side;Damping mechanism, the damping mechanism is fixedly installed on base upper surface middle part, the inside of the damping mechanism is provided with upper cavity and lower cavity, the upper cavity and lower cavity are arranged in upper and lower, the upper end of damping rod and cantilever load cell cantilever portion lower wall are mutually hinged, flow passage one is arranged between the upper cavity and lower cavity, flow passage two is arranged in the inside of the left and right sides of piston, iron core is integrally arranged in the middle of piston, battery coil is arranged on the outer wall of iron core, by the voltage controllable characteristics of magneto-rheological fluid, realize damping force self-adapting adjustment, sensor rebound oscillation can be quickly stabilized, improve the measurement accuracy of load cell.

Description

Technical Field

[0001] This utility model relates to the field of weighing sensor technology, and in particular to a damping matching mechanism for a weighing sensor. Background Technology

[0002] In many fields of modern industrial production and scientific research, load cells play a crucial role as key components that accurately convert gravity signals into electrical signals. From precise weighing of materials on automated industrial production lines to assisting in the measurement of human vital signs in medical equipment, and monitoring vehicle loads in the transportation sector, load cells are ubiquitous. Their measurement accuracy and stability directly affect the operational quality and reliability of the entire system.

[0003] In practical applications, the weighing process often faces numerous complex interference factors. Taking material weighing on an industrial assembly line as an example, the rapid movement of materials on the conveyor belt, the impact force when they fall, and the vibration of the conveyor belt itself all cause severe vibrations in the elastic element of the weighing sensor. In dynamic vehicle weighing scenarios, the bumps and inertial forces generated by the vehicle's acceleration and deceleration cause the load on the sensor to be in a constantly changing and unstable state. If these vibrations and impacts cannot be effectively suppressed, the sensor's output signal will continue to fluctuate and will not be able to quickly stabilize at a value that accurately reflects the weight of the object, resulting in large errors in the measurement results and seriously affecting the precise control of the production process and the reliability of the data.

[0004] Therefore, this application provides a damping matching mechanism for a weighing sensor. Utility Model Content

[0005] This invention provides a damping matching mechanism for a weighing sensor, which can solve the problem of decreased measurement accuracy caused by oscillation after the traditional weighing sensor rebounds under load.

[0006] This utility model provides a damping matching mechanism for a weighing sensor, comprising:

[0007] A base, wherein a mounting cavity is provided on one side of the base, and a circuit board is fixedly installed inside the mounting cavity;

[0008] A cantilever load cell, wherein the cantilever load cell is fixedly installed on one side of the upper surface of the base;

[0009] A damping mechanism is fixedly installed on the middle of the upper surface of the base. The damping mechanism has an upper cavity and a lower cavity arranged vertically. Both the upper cavity and the lower cavity are filled with magnetorheological fluid. A piston is slidably connected between the upper cavity and the lower cavity. A damping rod is fixedly installed on the upper end of the piston. The upper end of the damping rod is hinged to the lower wall of the cantilever of the cantilever load cell. A flow channel one is provided between the upper cavity and the lower cavity. Flow channels two are provided on both the left and right sides of the piston. An iron core is integrally provided in the middle of the piston. A battery coil is provided on the outer wall of the iron core.

[0010] In a damping matching mechanism of a weighing sensor according to an embodiment of the present invention, one-way valves are fixedly installed inside both the first flow channel and the second flow channel.

[0011] In a damping matching mechanism of a weighing sensor according to one embodiment of the present invention, a contact is fixedly installed on one side of the upper end of the cantilever weighing sensor, and a pressure head is provided at the upper end of the contact.

[0012] In a damping matching mechanism of a weighing sensor according to one embodiment of the present invention, a connecting cavity is provided inside the pressure head, and the area of ​​the connecting cavity is larger than the volume of the upper end of the contact head.

[0013] In a damping matching mechanism of a weighing sensor according to one embodiment of the present invention, a connecting bolt is threaded between the pressure head and the contact head.

[0014] In a damping matching mechanism for a weighing sensor according to an embodiment of the present invention, a battery is provided inside the circuit board, and the circuit board is electrically connected to the cantilever weighing sensor and the battery coil. A charging port is provided on the outer wall of the base, and the charging port is electrically connected to the circuit board.

[0015] In a damping matching mechanism of a weighing sensor according to one embodiment of the present invention, the distance between the contact and the strain gauge inside the cantilever weighing sensor is greater than 1 / 4 of the length of the cantilever portion of the cantilever weighing sensor.

[0016] The technical solution provided in this application embodiment may include the following beneficial effects: This application designs a damping matching mechanism for a weighing sensor.

[0017] 1. By utilizing the voltage-controllable characteristics of magnetorheological fluid, the damping force can be adaptively adjusted, which can quickly stabilize the rebound oscillation of the sensor and improve the measurement accuracy of the weighing sensor.

[0018] 2. By assembling and disassembling the connecting bolts, it is possible to switch between static and dynamic weighing modes to meet different application needs.

[0019] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a structural schematic diagram of an embodiment of this application;

[0022] Figure 2 This is a cross-sectional view of the damping mechanism in an embodiment of this application;

[0023] Figure 3 This is an embodiment of the present application. Figure 2 Enlarged view of point A in the middle;

[0024] Figure 4 This is a schematic diagram of the base structure in an embodiment of this application;

[0025] Figure 5 This is a cross-sectional view of the pressure head and contact in an embodiment of this application. Detailed Implementation

[0026] 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, not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0027] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0028] The following detailed description of some embodiments of this application is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0029] Example

[0030] like Figures 1 to 5 As shown, this application provides a damping matching mechanism for a weighing sensor, comprising:

[0031] The base 10 has an installation cavity 11 on one side inside. A circuit board 12 is fixedly installed inside the installation cavity 11. A battery is installed inside the circuit board 12. The circuit board 12 is electrically connected to the cantilever load cell 20 and the battery coil 37. A charging port is provided on the outer wall of the base 10 and is electrically connected to the circuit board 12. The circuit board 12 controls the cantilever load cell 20 and the battery coil 37 to achieve automatic damping adjustment.

[0032] The cantilever load cell 20 is fixedly installed on one side of the upper surface of the base 10. Its core function is to convert the gravity load of the object to be measured into an electrical signal. It is the core component of weighing measurement.

[0033] In one optional embodiment, a contact 21 is fixedly installed on one side of the upper end of the cantilever load cell 20. A pressure head 22 is provided on the upper end of the contact 21. A connecting cavity 24 is provided inside the pressure head 22. The area of ​​the connecting cavity 24 is larger than the volume of the upper end of the contact 21. Since the area of ​​the connecting cavity 24 is larger than the volume of the contact 21, the pressure head 22 can swing slightly on the upper end of the contact 21. When the sensor is used to measure equipment in production, the floating pressure head 22 can eliminate the interference of additional non-weighing directional forces such as lateral forces, impact forces, and torques on the weighing accuracy during the movement. At the same time, it can adapt to the positional deviation caused by the movement of the equipment and ensure that the load cell only bears the effective load along the "weighing axis".

[0034] In an optional embodiment, a connecting bolt 23 is threaded between the pressure head 22 and the contact 21. By setting the connecting bolt 23, the contact 21 and the pressure head 22 are fixed, allowing the sensor to weigh static equipment. By removing the connecting bolt 23, the contact 21 and the pressure head 22 are made to float, allowing the sensor to weigh moving equipment, making the equipment suitable for various scenarios.

[0035] In one optional implementation, the distance between the contact 21 and the strain gauge inside the cantilever load cell 20 is greater than 1 / 4 of the length of the cantilever portion of the cantilever load cell 20. This spatial isolation allows the damping mechanism 30 to be located in the stress attenuation zone of the cantilever load cell 20, preventing its additional force and structural constraints from interfering with the linear relationship between the weight and deformation of the cantilever load cell 20. At the same time, it ensures that the damping mechanism 30 effectively suppresses oscillations, achieving a balance between weighing accuracy and damping effect.

[0036] A damping mechanism 30 is fixedly installed in the middle of the upper surface of the base 10. The damping mechanism 30 has an upper cavity 31 and a lower cavity 32 inside, which are arranged vertically. Magnetorheological fluid is installed inside both the upper cavity 31 and the lower cavity 32. A piston 33 is slidably connected between the upper cavity 31 and the lower cavity 32. A damping rod 34 is fixedly installed on the upper end of the piston 33. The upper end of the damping rod 34 is hinged to the lower wall of the cantilever part of the cantilever load cell 20. A flow channel 35 is provided between the upper cavity 31 and the lower cavity 32. Flow channels 38 are provided on both the left and right sides of the piston 33. An iron core 36 is integrally provided in the middle of the piston 33. A battery coil 37 is provided on the outer wall of the iron core 36.

[0037] After adopting the above technical solution, when the sensor weighs, the cantilever load cell 20 deforms under the influence of gravity. During this process, the cantilever load cell 20 presses down on the damping rod 34, and the damping rod 34 is pushed by the force to move the piston 33 at its lower part downward. During the movement of the piston 33, the magnetorheological fluid in the lower cavity 32 can enter the upper cavity 31 through the flow channel 35. There is no obvious damping force. After the sensor finishes measuring, the cantilever load cell 20 returns to its original shape and rebounds, generating mechanical oscillation. During its rebound, the cantilever load cell... The lower wall of the weight sensor 20 drives the damping rod 34 to move along its trajectory. Since the upper cavity 31 contains a large amount of magnetorheological fluid, the viscosity of the fluid resists the upward movement of the piston 33. This resistance dissipates the amplitude, thus suppressing sensor oscillation. Depending on the object being measured, the viscosity of the magnetorheological fluid can be changed by altering the voltage to the battery coil 37, allowing the sensor to automatically adjust its damping according to the different objects being measured. The formula relating the coil voltage U to the weight G of the object being measured is: U = K * , where K is the magnetorheological shear coefficient.

[0038] In an optional embodiment, a one-way valve 39 is fixedly installed inside both the first flow channel 35 and the second flow channel 38. By setting the one-way valve 39, the magnetorheological fluid in the first flow channel 35 can only flow from the lower cavity 32 to the upper cavity 31, and the magnetorheological fluid in the second flow channel 38 can only flow from the upper cavity 31 to the lower cavity 32.

[0039] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection. They can refer to a mechanical connection or an electrical connection. They can refer to a direct connection or an indirect connection through an intermediate medium, and they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0040] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0041] The foregoing disclosure provides many different embodiments or examples for implementing different structures of this application. To simplify the disclosure, specific examples of components and arrangements are described above. Of course, these are merely examples and are not intended to limit the scope of this application. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, examples of various specific processes and materials are provided in this application, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0042] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with an embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0043] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A damping matching mechanism for a weighing sensor, characterized in that, include: A base, wherein a mounting cavity is provided on one side of the base, and a circuit board is fixedly installed inside the mounting cavity; A cantilever load cell, wherein the cantilever load cell is fixedly installed on one side of the upper surface of the base; A damping mechanism is fixedly installed on the middle of the upper surface of the base. The damping mechanism has an upper cavity and a lower cavity arranged vertically. Both the upper cavity and the lower cavity are filled with magnetorheological fluid. A piston is slidably connected between the upper cavity and the lower cavity. A damping rod is fixedly installed on the upper end of the piston. The upper end of the damping rod is hinged to the lower wall of the cantilever of the cantilever load cell. A flow channel one is provided between the upper cavity and the lower cavity. Flow channels two are provided on both the left and right sides of the piston. An iron core is integrally provided in the middle of the piston. A battery coil is provided on the outer wall of the iron core.

2. The damping matching mechanism for a weighing sensor according to claim 1, characterized in that, One-way valves are fixedly installed inside both flow channel one and flow channel two.

3. The damping matching mechanism for a weighing sensor according to claim 1, characterized in that, A contact is fixedly installed on one side of the upper end of the cantilever weighing sensor, and a pressure head is provided at the upper end of the contact.

4. The damping matching mechanism for a weighing sensor according to claim 3, characterized in that, The pressure head has a connecting cavity inside, and the area of ​​the connecting cavity is larger than the volume of the upper end of the contact head.

5. The damping matching mechanism for a weighing sensor according to claim 3, characterized in that, The pressure head and the contact head are connected by a threaded bolt.

6. The damping matching mechanism for a weighing sensor according to claim 1, characterized in that, The circuit board contains a storage battery and is electrically connected to the cantilever load cell and the battery coil. The outer wall of the base has a charging port that is electrically connected to the circuit board.

7. The damping matching mechanism for a weighing sensor according to claim 3, characterized in that, The distance between the contact and the strain gauge inside the cantilever load cell is greater than 1 / 4 of the length of the cantilever portion of the load cell.

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