Integrated modular electromagnetic force balance weighing sensor

Abstract

The utility model discloses an integrated modular electromagnetic force balance weighing sensor, which relates to the technical field of precise weighing detection and comprises an integrated sensor module main body. The cross beam is arranged at one end of the integrated sensor module main body; an electromagnetic force balancing mechanism; the photoelectric sensing assembly is arranged in one end of the integrated sensor module main body; the sensor module is arranged on the side wall of one end of the integrated sensor module body; and the elastic supporting mechanisms are arranged on two sides of the top end of the integrated sensor module main body so as to realize elastic supporting of the cross beam. The weighing device is reasonable and reliable in structure, lower in implementation cost, simpler and more convenient to process and assemble, more flexible in unbalance loading error adjustment, and higher in weighing precision and stability. According to the utility model, an integral module structure is adopted, assembly links are reduced, assembly errors are reduced, the integral rigidity is stronger, the deformation is not easy to occur after long-term use, and the stability is higher.

Description

Technical Field

[0001] This utility model relates to the field of precision weighing and detection technology, specifically to an integrated modular electromagnetic force balance weighing sensor. Background Technology

[0002] High-precision electronic balances are widely used in laboratory metrology, industrial batching, and pharmaceutical testing. Their core component is the electromagnetic force balance load cell. The electromagnetic force balance load cell detects beam offset through photoelectric sensing and achieves balance using electromagnetic force and the measured gravity. It features high weighing accuracy, good linearity, and fast response.

[0003] Existing traditional electromagnetic force balance load cells have the following shortcomings in practical applications:

[0004] 1. Traditional sensors often use beryllium bronze to make elastic springs, which are expensive and have complex processing technology, making them unsuitable for mass production and cost control.

[0005] 2. The reed and sensor body are mostly of a split structure, with many assembly steps, making it difficult to guarantee coaxiality and parallelism, which can easily introduce assembly errors and affect long-term stability.

[0006] 3. The method of adjusting the off-center load error is complicated, and it often relies on special tooling or complex adjustment mechanisms, resulting in low debugging efficiency and inconvenience for on-site calibration and maintenance.

[0007] 4. The structural integration is low, and the overall rigidity and anti-interference ability need to be further improved.

[0008] No effective solutions have yet been proposed to address the problems in the relevant technologies. Utility Model Content

[0009] In view of the problems in related technologies, this utility model proposes an integrated modular electromagnetic force balance weighing sensor to overcome the above-mentioned technical problems existing in the existing related technologies.

[0010] Therefore, the specific technical solution adopted by this utility model is as follows:

[0011] The integrated modular electromagnetic force balance load cell includes:

[0012] Integrated sensor module body;

[0013] A crossbeam is located at one end of the integrated sensor module body;

[0014] Electromagnetic force balancing mechanism; located inside one end of the integrated sensor module body.

[0015] Photoelectric sensing component; disposed on one side wall of the integrated sensor module body;

[0016] The elastic support mechanism is located on both sides of the top of the integrated sensor module body to achieve elastic support for the crossbeam.

[0017] Furthermore, in order to receive the position signal from the photoelectric sensing component and generate corresponding electromagnetic force by controlling the coil current to restore the crossbeam to the equilibrium position and achieve high-precision force balance weighing, the electromagnetic force balance mechanism includes a magnetic yoke located inside one end of the integrated sensor module body. A temperature sensing element is located at the bottom of the magnetic yoke, a magnet is located at the bottom of the inner part of the magnetic yoke, a pole shoe is located at the top of the magnet, and a coil frame is located at the top of the pole shoe. A magnetic yoke cover is located at the top of the magnetic yoke. The magnetic yoke cover is fixedly connected to the integrated sensor module body by magnetic yoke cover fastening screws. The top of the magnetic yoke is fixedly connected to the integrated sensor module body by magnetic yoke fastening screws.

[0018] Furthermore, in order to detect the balance position of the crossbeam and feed back the detected position signal to the electromagnetic force balancing mechanism, the photoelectric sensing component includes a photoelectric box disposed on one side wall of the integrated sensor module body, with a transmitting tube disposed on one side of the photoelectric box and a receiving tube disposed on the other side of the photoelectric box; a limiting plate is disposed at the bottom of the photoelectric box, and the limiting plate is fixedly connected to the integrated sensor module body by limiting plate fastening screws; the photoelectric box is fixedly connected to the integrated sensor module body by several photoelectric box fastening screws.

[0019] Furthermore, in order to achieve force transmission, the force on the weighed object can be transmitted to the main body of the integrated sensor module. A tray plate is provided at the top of the other end of the main body of the integrated sensor module, and the tray plate is connected to the main body of the integrated sensor module by a tray plate fastening screw. A tray plate shaft is provided at one end of the tray plate.

[0020] The beneficial effects of this utility model are as follows:

[0021] 1. This utility model has a reasonable and reliable structure, and it has lower implementation cost, simpler processing and assembly, more flexible adjustment of off-center load error, and higher weighing accuracy and stability.

[0022] 2. This utility model adopts an integrated modular structure, which reduces assembly steps, reduces assembly errors, strengthens overall rigidity, is not easily deformed during long-term use, and has higher stability.

[0023] 3. The elastic support mechanism of this utility model uses machine-milled aluminum springs instead of beryllium bronze springs, which reduces material and processing costs and is suitable for mass production.

[0024] 4. This utility model can adjust the off-center load error by means of two adjusting screws. The operation is intuitive and the debugging efficiency is high. It is convenient for production and later maintenance, making the adjustment of off-center load error simple and efficient.

[0025] 5. The photoelectric sensing detection of this utility model is sensitive and has a fast response speed. Combined with closed-loop electromagnetic force balance control, it ensures that the electronic balance has stable linearity and repeatability under high-precision weighing.

[0026] 6. The modular structure adopted by this utility model is simple to assemble and can be directly adapted to various high-precision electronic balance main units. It has a wide range of applications, strong versatility, and is easy to integrate.

[0027] 7. By setting up an electromagnetic force balancing mechanism, the position signal of the photoelectric sensing component can be received, and the corresponding electromagnetic force can be generated by controlling the coil current to restore the crossbeam to the balanced position, thereby achieving high-precision force balance weighing.

[0028] 8. By setting up photoelectric sensing components, the balance position of the crossbeam can be detected, and the detected position signal is fed back to the electromagnetic force balancing mechanism. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is a schematic diagram of the overall assembly structure of the integrated modular electromagnetic force balance weighing sensor according to an embodiment of the present utility model;

[0031] Figure 2 This is an assembly effect diagram of the integrated modular electromagnetic force balance weighing sensor according to an embodiment of the present utility model;

[0032] Figure 3 This is a side view of an integrated modular electromagnetic force balance weighing sensor according to an embodiment of the present utility model;

[0033] Figure 4 This is a three-dimensional rendering of the main body of the integrated sensor module in the integrated modular electromagnetic force balance weighing sensor according to an embodiment of the present utility model;

[0034] Figure 5 This is a side view of the main body of the integrated sensor module in the integrated modular electromagnetic force balance weighing sensor according to an embodiment of the present utility model;

[0035] Figure 6 This is a three-dimensional rendering of the photoelectric box in the integrated modular electromagnetic force balance weighing sensor according to an embodiment of the present utility model.

[0036] Figure 7This is a three-dimensional rendering of the magnetic yoke in the integrated modular electromagnetic force balance weighing sensor according to an embodiment of the present utility model;

[0037] Figure 8 This is a three-dimensional rendering of the yoke and magnet assembled in the integrated modular electromagnetic force balance weighing sensor according to an embodiment of the present invention.

[0038] Figure 9 This is a three-dimensional rendering of the integrated modular electromagnetic force balance weighing sensor according to an embodiment of the present invention, after the magnetic yoke, magnet and pole shoes are assembled.

[0039] In the picture:

[0040] 1. Integrated sensor module body; 2. Temperature sensing element; 3. Magnetic yoke; 4. Magnet; 5. Pole shoe; 6. Coil frame; 7. Disc support plate; 8. Disc support shaft; 9. Limiting plate; 10. Receiving tube; 11. Photoelectric box; 12. Transmitting tube; 13. Adjusting screw assembly; 14. Magnetic yoke top cover; 15. Disc support plate fastening screws; 16. Limiting plate fastening screws; 17. Photoelectric box fastening screws; 18. Magnetic yoke fastening screws; 19. Coil frame fastening screws; 20. Magnetic yoke top cover fastening screws; 101. Load-bearing beam; 102. 103. Vertical elastic body; 104. Horizontal elastic body; 105. Oblique elastic body; 106. Lower plate elastic body; 107. Power arm; 108. Resistance arm; 109. Crossbeam; 1010. Light shield; 1011. Elastic support mechanism; 302. Temperature sensing element mounting hole; 303. Magnetic yoke top cover mounting hole; 304. Magnetic yoke mounting hole; 305. Limiting groove; 1106. Magnet mounting position; 1107. Transmitter tube mounting hole; 1108. Receiver tube mounting hole; 1109. Photoelectric box fixing hole; 11000. Receiver tube positioning hole. Detailed Implementation

[0041] To further illustrate the various embodiments, the present invention provides accompanying drawings, which are part of the disclosure of the present invention. These drawings are mainly used to illustrate the embodiments and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, those skilled in the art should be able to understand other possible implementation methods and the advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are usually used to represent similar components.

[0042] According to an embodiment of the present invention, an integrated modular electromagnetic force balance weighing sensor is provided.

[0043] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments, such as... Figures 1-9 As shown, the integrated modular electromagnetic force balance weighing sensor according to an embodiment of the present invention includes:

[0044] The integrated sensor module body 1; a crossbeam 108, located at one end of the integrated sensor module body 1; an electromagnetic force balancing mechanism, located inside one end of the integrated sensor module body 1; a photoelectric sensing component, located on one side wall of the integrated sensor module body 1; and an elastic support mechanism 1010, located on both sides of the top of the integrated sensor module body 1, to achieve elastic support for the crossbeam 108.

[0045] The integrated sensor module body 1 comprises a load-bearing beam 101, a vertical elastic body 102, a horizontal elastic body 103, an oblique elastic body 104, a lower attachment plate elastic body 105, a power arm 106, a resistance arm 107, and a light-shielding plate 109. The top of the load-bearing beam 101 is connected to the tray support plate 7 via tray support plate fastening screws 15. Furthermore, in specific applications, the elastic support mechanism 1010 uses machine-milled aluminum springs instead of traditional beryllium bronze springs. Aluminum springs offer better processing consistency, stable rigidity, lower material and processing costs, and stable elastic recovery performance. The structural composition of the integrated sensor module body 1 and the positional relationships between its sub-components are existing technologies and will not be elaborated upon further here.

[0046] The integrated sensor module body 1 has symmetrically arranged adjusting screw assemblies 13 on both sides of its top end for adjusting off-center load error. By screwing in or out the adjusting screw assemblies 13, the local force state can be changed to adjust the off-center load error. The photoelectric sensing component is used to detect the balance position of the crossbeam 108 and feeds the position signal back to the electromagnetic force balancing mechanism. The electromagnetic force balancing mechanism adjusts the output force in real time according to the signal, so that the crossbeam 108 can quickly stabilize at the balance position and ensure high-precision weighing.

[0047] Secondly, the crossbeam 108 serves as a force transmission component, with one end bearing the load being measured and the other end cooperating with the electromagnetic force balancing mechanism.

[0048] By utilizing the above-mentioned technical solutions of this utility model, the structure of this utility model is reasonable and reliable, and it achieves lower costs, simpler processing and assembly, more flexible adjustment of off-center load error, and higher weighing accuracy and stability. This utility model adopts an integrated modular structure, reducing assembly steps, lowering assembly errors, increasing overall rigidity, making it less prone to deformation over long-term use, and improving stability. The elastic support mechanism 1010 of this utility model uses machine-milled aluminum springs instead of beryllium bronze springs, resulting in lower material and processing costs and suitability for mass production. This utility model allows for adjustment of off-center load error via two adjusting screws, providing intuitive operation, high debugging efficiency, and facilitating production and subsequent maintenance, making off-center load error adjustment simple and efficient. This utility model features sensitive photoelectric sensing detection and fast response speed, combined with closed-loop electromagnetic force balance control, ensuring stable linearity and repeatability of the electronic balance under high-precision weighing. The modular structure adopted by this utility model is simple to assemble, can be directly adapted to various high-precision electronic balance main units, has a wide range of applications, strong versatility, and is easy to integrate.

[0049] In one embodiment, the electromagnetic force balancing mechanism includes a magnetic yoke 3 disposed inside one end of the integrated sensor module body 1. A temperature sensing element 2 is disposed at the bottom end of the magnetic yoke 3. A magnet 4 is disposed at the bottom end of the inner part of the magnetic yoke 3. A pole shoe 5 is disposed at the top end of the magnet 4. A coil frame 6 is disposed at the top end of the pole shoe 5. A magnetic yoke cover 14 is disposed at the top end of the magnetic yoke 3. The magnetic yoke cover 14 and the magnetic yoke 3 are fixedly connected by magnetic yoke cover fastening screws 20. The top end of the magnetic yoke 3 is fixedly connected to the integrated sensor module body 1 by magnetic yoke fastening screws 18.

[0050] In addition, the bottom end of the magnetic yoke 3 is provided with a temperature sensing element mounting hole 301 that cooperates with the temperature sensing element 2; the top outer side of the magnetic yoke 3 is also provided with a magnetic yoke cover mounting hole 302 that cooperates with the magnetic yoke cover 14; a magnetic yoke mounting hole 303 and a limiting groove 304 that cooperate with the magnetic yoke fastening screw 18; and the top middle part of the magnetic yoke 3 is the magnet mounting position 305.

[0051] Among them, the electromagnetic force balancing mechanism can receive the position signal of the photoelectric sensing component, generate corresponding electromagnetic force by controlling the coil current, so that the crossbeam 108 returns to the balanced position, and realizes high-precision force balance weighing.

[0052] In one embodiment, the photoelectric sensing component includes a photoelectric box 11 disposed on one side wall of the integrated sensor module body 1, with a transmitting tube 12 disposed on one side of the photoelectric box 11 and a receiving tube 10 disposed on the other side of the photoelectric box 11; a limiting plate 9 is disposed at the bottom of the photoelectric box 11, and the limiting plate 9 is fixedly connected to the integrated sensor module body 1 by limiting plate fastening screws 16; the photoelectric box 11 is fixedly connected to the integrated sensor module body 1 by several photoelectric box fastening screws 17, thereby being able to receive the position signal of the photoelectric sensing component, and generate corresponding electromagnetic force by controlling the coil current, so that the crossbeam 108 returns to the equilibrium position, thereby achieving high-precision force balance weighing.

[0053] In addition, the photoelectric box 11 is provided with a transmitter tube mounting hole 1101, a receiver tube mounting hole 1102, a photoelectric box fixing hole 1103, and a receiver tube positioning hole 1104, which are respectively matched with the transmitter tube 12, the receiver tube 10, the photoelectric box fastening screw 17, and the receiver tube 10.

[0054] The light-shielding plate 109 is located on the crossbeam 108, with a photoelectric detection slit in the middle. The light-shielding plate 109 moves together with the crossbeam 108. When the load changes, the crossbeam 108 shifts, the position of the light-shielding plate 109 changes, the light flux received by the receiving tube through the photoelectric detection slit changes, and a corresponding electrical signal is output.

[0055] In one embodiment, for the integrated sensor module body 1, a tray plate 7 is provided at the top of the other end of the integrated sensor module body 1, and the tray plate 7 is connected to the integrated sensor module body 1 by a tray plate fastening screw 15. A tray plate shaft 8 is provided at one end of the tray plate 7, thereby realizing the transmission of force. The force received by the weighing of the item can be transmitted to the integrated sensor module body 1, thereby detecting the balance position of the crossbeam 108 and feeding back the detected position signal to the electromagnetic force balancing mechanism.

[0056] To facilitate understanding of the above-mentioned technical solutions of this utility model, the working principle or operation method of this utility model in actual process will be described in detail below.

[0057] In practical applications, the balance pan bears the weight, and the pan support shaft 8 experiences a downward force. After being buffered by the pan support plate 7, the force is transmitted to the load-bearing beam 101. Because the sensor module is a cantilever beam parallel beam structure, the load-bearing beam undergoes a translational change, while the load-bearing surface remains horizontal. The deformation is transmitted to the power arm 106 through the vertical elastic body 102, and amplified by the lever. This causes the light-shielding plate 109 at the end of the crossbeam 108 to deviate from its original equilibrium position. The infrared light emitted by the transmitting tube 12 passes through the photoelectric detection slit and shines on the receiving tube 10, changing the light flux. The control board detects this change and outputs a corresponding current signal to the coil frame 6, causing the light-shielding plate 109 to return to the equilibrium position. At the same time, it drives the crossbeam 108 and the load-bearing beam back to the equilibrium position, completing the weighing process.

[0058] In summary, with the help of the above-mentioned technical solutions of this utility model, the structure of this utility model is reasonable and reliable, and it achieves lower cost, simpler processing and assembly, more flexible adjustment of off-center load error, and higher weighing accuracy and stability. This utility model adopts an integrated modular structure, reducing assembly steps, lowering assembly errors, increasing overall rigidity, making it less prone to deformation over long-term use, and improving stability. The elastic support mechanism 1010 of this utility model uses machine-milled aluminum springs instead of beryllium bronze springs, resulting in lower material and processing costs and suitability for mass production. This utility model allows for adjustment of off-center load error via two adjusting screws, providing intuitive operation, high debugging efficiency, and facilitating production and subsequent maintenance, making off-center load error adjustment simple and efficient. This utility model features sensitive photoelectric sensing detection and fast response speed, combined with closed-loop electromagnetic force balance control, ensuring stable linearity and repeatability of the electronic balance under high-precision weighing. The modular structure adopted by this utility model is simple to assemble, can be directly adapted to various high-precision electronic balance main units, has a wide range of applications, strong versatility, and is easy to integrate. By setting up an electromagnetic force balancing mechanism, the position signal from the photoelectric sensing component can be received, and a corresponding electromagnetic force can be generated by controlling the coil current to restore the crossbeam 108 to its balanced position, thus achieving high-precision force balance weighing. The photoelectric sensing component can detect the balanced position of the crossbeam 108 and feed the detected position signal back to the electromagnetic force balancing mechanism.

[0059] In this utility model, unless otherwise explicitly specified and limited, the terms "installation", "setting", "connection", "fixing", "screw connection", etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0060] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An integrated modular electromagnetic force balance weighing sensor, characterized in that, include: Integrated sensor module body (1); A crossbeam (108) is disposed at one end of the integrated sensor module body (1); An electromagnetic force balancing mechanism is located inside one end of the integrated sensor module body (1). Photoelectric sensing component; disposed on one end sidewall of the integrated sensor module body (1); The elastic support mechanism (1010) is set on both sides of the top of the integrated sensor module body (1) to achieve elastic support of the crossbeam.

2. The integrated modular electromagnetic force balance weighing sensor according to claim 1, characterized in that, The electromagnetic force balancing mechanism includes a magnetic yoke (3) disposed inside one end of the integrated sensor module body (1), a temperature sensing element (2) is disposed at the bottom end of the magnetic yoke (3), a magnet (4) is disposed at the bottom end of the inner part of the magnetic yoke (3), a pole shoe (5) is disposed at the top end of the magnet (4), and a coil frame (6) is disposed at the top end of the pole shoe (5). The top of the magnetic yoke (3) is provided with a magnetic yoke cover (14).

3. The integrated modular electromagnetic force balance weighing sensor according to claim 2, characterized in that, The magnetic yoke cover (14) and the integrated sensor module body (1) are fixedly connected by magnetic yoke cover fastening screws (20).

4. The integrated modular electromagnetic force balance weighing sensor according to claim 2, characterized in that, The top of the magnetic yoke (3) is fixedly connected to the main body (1) of the integrated sensor module by a magnetic yoke fastening screw (18).

5. The integrated modular electromagnetic force balance weighing sensor according to claim 1, characterized in that, The photoelectric sensing component includes a photoelectric box (11) disposed on one side wall of the integrated sensor module body (1), and a transmitting tube (12) is disposed on one side of the photoelectric box (11), and a receiving tube (10) is disposed on the other side of the photoelectric box (11). The bottom of the photoelectric box (11) is provided with a limiting plate (9), and the limiting plate (9) is fixedly connected to the main body (1) of the integrated sensor module by a limiting plate fastening screw (16).

6. The integrated modular electromagnetic force balance weighing sensor according to claim 5, characterized in that, The photoelectric box (11) and the integrated sensor module body (1) are fixedly connected by several photoelectric box fastening screws (17).

7. The integrated modular electromagnetic force balance weighing sensor according to claim 1, characterized in that, The integrated sensor module body (1) has a disk support plate (7) at the top of the other end, and the disk support plate (7) is connected to the integrated sensor module body (1) by a disk support plate fastening screw (15). One end of the disk support plate (7) is provided with a disk support shaft (8).

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