A weighing sensor resistant to electromagnetic interference

Abstract

The utility model belongs to the weighing sensor technical field, concretely relates to a kind of anti-electromagnetic interference's weighing sensor, and the new type includes: elastomer, its lateral surface middle part is equipped with pass portion;Two groups of electrically connected strain gauge groups, symmetrically set on the upper and lower parts of elastomer, are located pass portion both sides;Two metal shielding covers, symmetrically set on the upper and lower parts of elastomer, are respectively covered in the outside of corresponding strain gauge group;Shielding cable is electrically connected with two strain gauge groups, and the anti-electromagnetic interference's weighing sensor of the utility model is shielded to the local strain gauge group by setting metal shielding cover, and shielding cable is whole protection to transmission signal, forms double shielding system, to reach effectively blocking outside electromagnetic interference, so that sensor can still maintain measurement accuracy in complex electromagnetic environment.

Description

Technical Field

[0001] This utility model belongs to the field of weighing sensor technology, specifically relating to a weighing sensor resistant to electromagnetic interference. Background Technology

[0002] A load cell is a precision device that converts force or weight into a measurable electrical signal, and it can be called the "heart" of modern electronic scales, industrial weighing instruments, and force control systems.

[0003] With the widespread use of electronic devices and the increasing complexity of the electromagnetic environment, a large number of electromagnetic waves of different frequencies and intensities exist in the surrounding space. Many existing load cells are not adequately designed to resist electromagnetic interference and lack effective protective measures. When subjected to electromagnetic interference, the internal electrical signals of the sensor are severely affected, leading to a significant decrease in measurement accuracy.

[0004] Therefore, in order to solve the above problems, it is necessary to design a weighing sensor that is resistant to electromagnetic interference. Utility Model Content

[0005] The purpose of this invention is to provide a weighing sensor that is resistant to electromagnetic interference, so as to solve the technical problems mentioned in the background art.

[0006] To solve the above-mentioned technical problems, this utility model provides a weighing sensor resistant to electromagnetic interference, comprising: An elastomer has a through section in the middle of its side; two sets of electrically connected strain gauges are symmetrically arranged on the upper and lower parts of the elastomer, located on both sides of the through section; two metal shields are symmetrically arranged on the upper and lower parts of the elastomer, respectively covering the outside of the corresponding strain gauge sets; and a shielded cable is electrically connected to the two strain gauge sets.

[0007] The elastic body has mounting parts in the middle of its upper and lower parts; the two strain gauge groups and the two metal shields are respectively mounted on the corresponding mounting parts.

[0008] The strain gauge assembly includes: a temperature compensation strain gauge and a measuring strain gauge disposed within the mounting section; wherein the temperature compensation strain gauge and the measuring strain gauge are electrically connected and arranged in a T-shape; and the metal shield is T-shaped and covers the temperature compensation strain gauge and the measuring strain gauge.

[0009] The elastic body is provided with a first through hole; the first through hole is connected to two mounting parts; the upper temperature compensation strain gauge and the measuring strain gauge are electrically connected to the lower temperature compensation strain gauge and the measuring strain gauge, and the connecting line is located in the first through hole.

[0010] The elastic body is provided with a connecting part; wherein the connecting part is connected to any mounting part and the first through hole; the side of the elastic body is provided with a mounting hole; the mounting hole is connected to the connecting part; both sets of temperature compensation strain gauges and measuring strain gauges are electrically connected to the shielded cable, and the connection is located inside the connecting part.

[0011] The two mounting portions, the first through hole, and the connecting portion are provided with a protective coating; wherein the protective coating is flush with the elastomer.

[0012] The elastomer is symmetrically provided with two pairs of second through holes; wherein the two pairs of second through holes are located on both sides of the mounting part.

[0013] The beneficial effects of this utility model are: (I) This utility model forms a double shielding system by setting a metal shielding cover to partially shield the strain gauge group and a shielded cable to protect the transmitted signal throughout the process, thereby effectively blocking external electromagnetic interference and enabling the sensor to maintain measurement accuracy in complex electromagnetic environments.

[0014] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objectives and other advantages of this invention are realized and obtained through the structures particularly pointed out in the description and the accompanying drawings.

[0015] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0016] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art 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 from these drawings without creative effort.

[0017] Figure 1 The three-dimensional representation of the preferred embodiment of this utility model. Figure One ; Figure 2 The three-dimensional representation of the preferred embodiment of this utility model. Figure Two ; Figure 3 The three-dimensional representation of the preferred embodiment of this utility model. Figure Three ; Figure 4 The three-dimensional representation of the preferred embodiment of this utility model. Figure Four .

[0018] In the picture: Elastomer 1, through part 101, mounting part 102, first through hole 103, connecting part 104, mounting hole 105, second through hole 106; Strain gauge group 2, temperature compensation strain gauge 201, measuring strain gauge 202; 3. Metal shielding cover; 4. Shielded cable; 5. Protective coating. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model. Example 1

[0020] like Figures 1 to 4 As shown, this embodiment provides a weighing sensor resistant to electromagnetic interference, including: An elastic body 1 has a through-hole 101 in the middle of its side; two electrically connected strain gauge groups 2 are symmetrically arranged on the upper and lower parts of the elastic body 1, located on both sides of the through-hole 101; two metal shields 3 are symmetrically arranged on the upper and lower parts of the elastic body 1, respectively covering the outside of the corresponding strain gauge groups 2; a shielded cable 4 is electrically connected to the two strain gauge groups 2; aluminum elastic body 1 is the preferred material for the elastic body 1; by setting the through-hole 101 in the middle of the elastic body 1, the stress distribution path is changed, so that the stress is more evenly distributed on the elastic body 1, improving the measurement accuracy and stability of the sensor; by setting the metal shields 3 to cover the outside of the strain gauge groups 2, the electromagnetic shielding effect of the metal is used to block the interference of external electromagnetic waves on the electrical signal of the strain gauge groups 2, ensuring signal purity; the shielded cable 4 has a shielding layer wrapped inside the cable and is electrically connected to the strain gauge groups 2 to prevent electromagnetic interference during signal transmission and enhance the bending resistance of the cable.

[0021] In this embodiment, by setting a metal shield 3 to partially shield the strain gauge group 2 and a shielded cable 4 to protect the transmitted signal throughout the process, a double shielding system is formed, thereby effectively blocking external electromagnetic interference and enabling the sensor to maintain measurement accuracy in complex electromagnetic environments.

[0022] The elastic body 1 has an installation part 102 in the middle of its upper and lower parts; the two strain gauge groups 2 and the two metal shields 3 are respectively installed on the corresponding installation parts 102; by setting the installation parts 102, a fixed installation position is provided for the strain gauge groups 2 and the metal shields 3, while ensuring that the protective coating 5 is flush with the elastic body 1 after it is applied.

[0023] The strain gauge group 2 includes a temperature compensation strain gauge 201 and a measuring strain gauge 202 disposed within the mounting portion 102; wherein the temperature compensation strain gauge 201 and the measuring strain gauge 202 are electrically connected and arranged in a T-shape; the metal shield 3 is T-shaped and covers the temperature compensation strain gauge 201 and the measuring strain gauge 202; wherein the measuring strain gauge 202 directly senses the deformation of the elastic body 1, generates a change in resistance, and forms a measuring electrical signal; wherein the temperature compensation strain gauge 201 and the measuring strain gauge 202 are electrically connected in a T-shape to compensate for the influence of ambient temperature changes on measurement accuracy and avoid signal drift caused by temperature; wherein by setting the metal shield 3 in a T-shape to cover the outside of the strain gauge group 2, the electromagnetic shielding effect of the metal is used to block the interference of external electromagnetic waves on the electrical signal of the strain gauge group 2, ensuring signal purity.

[0024] The elastic body 1 is provided with a first through hole 103; the first through hole 103 is connected to the two mounting parts 102; the upper temperature compensation strain gauge 201 and the measuring strain gauge 202 are electrically connected to the lower temperature compensation strain gauge 201 and the measuring strain gauge 202, and the connecting line is located in the first through hole 103; wherein the first through hole 103 is provided to connect the upper and lower mounting parts 102, which is used to accommodate the internal connecting line of the strain gauge group 2 and avoid the line being exposed.

[0025] The elastic body 1 is provided with a connecting part 104; wherein the connecting part 104 is connected to any mounting part 102 and the first through hole 103; the side of the elastic body 1 is provided with a mounting hole 105; the mounting hole 105 is connected to the connecting part 104; both sets of temperature compensation strain gauges 201 and measuring strain gauges 202 are electrically connected to the shielded cable 4, and the connection is located inside the connecting part 104; wherein the connecting part 104 is connected to the mounting part 102, the first through hole 103 and the mounting hole 105 to form a signal access channel for the shielded cable 4, while protecting the line connection.

[0026] The mounting portion 102, the first through hole 103, and the connecting portion 104 are provided with a protective coating 5; wherein the protective coating 5 is flush with the elastomer 1; wherein by providing the protective coating 5 to cover the interior of the mounting portion 102, the first through hole 103, and the connecting portion 104 and to be flush with the surface of the elastomer 1, moisture, dust, or corrosive substances are prevented from entering, thereby extending the service life of the sensor.

[0027] The elastic body 1 is symmetrically provided with two pairs of second through holes 106; wherein the two pairs of second through holes 106 are located on both sides of the mounting part 102; wherein by providing two pairs of second through holes 106, the effect of facilitating the connection of the elastic body 1 with other components is achieved.

[0028] All the devices selected in this application (parts whose specific structures are not specified) are general standard parts or parts known to those skilled in the art. Their structures and principles can be learned by those skilled in the art through technical manuals or conventional experimental methods.

[0029] In the description of the embodiments of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" 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 connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0030] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model 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 utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0031] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. The apparatus embodiments described above are merely illustrative. For example, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. Furthermore, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Additionally, the shown or discussed mutual couplings, direct couplings, or communication connections may be through some communication interfaces; indirect couplings or communication connections between devices or units may be electrical, mechanical, or other forms.

[0032] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0033] In addition, the functional units in the various embodiments of this utility model can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.

[0034] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A weighing sensor resistant to electromagnetic interference, characterized in that, include: An elastomer (1) has a through portion (101) in the middle of its side surface. Two sets of electrically connected strain gauge groups (2) are symmetrically arranged on the upper and lower parts of the elastic body (1), located on both sides of the through part (101); Two metal shields (3) are symmetrically arranged on the upper and lower parts of the elastic body (1), respectively covering the outside of the corresponding strain gauge group (2); The shielded cable (4) is electrically connected to the two strain gauge groups (2); The elastic body (1) has mounting parts (102) at the middle of its upper and lower parts; wherein The two strain gauge groups (2) and the two metal shields (3) are respectively mounted on the corresponding mounting parts (102); The strain gauge group (2) includes: a temperature compensation strain gauge (201) and a measuring strain gauge (202) disposed in the mounting part (102). in The temperature compensation strain gauge (201) and the measuring strain gauge (202) are electrically connected and arranged in a T-shape; The metal shield (3) is T-shaped and covers the temperature compensation strain gauge (201) and the measuring strain gauge (202); The elastomer (1) is provided with a first through hole (103); The first through hole (103) is connected to the two mounting parts (102); The upper temperature compensation strain gauge (201) and the measuring strain gauge (202) are electrically connected to the lower temperature compensation strain gauge (201) and the measuring strain gauge (202), and the connection line is located in the first through hole (103).

2. The electromagnetic interference resistant weighing sensor as described in claim 1, characterized in that, The elastic body (1) is provided with a connecting part (104); wherein The connecting part (104) communicates with any mounting part (102) and the first through hole (103); The elastomer (1) has mounting holes (105) on its side. The mounting hole (105) communicates with the connecting part (104); Both sets of temperature compensation strain gauges (201) and measuring strain gauges (202) are electrically connected to the shielded cable (4), and the connection is located inside the connection part (104).

3. The anti-electromagnetic interference weighing sensor as described in claim 2, characterized in that, A protective coating (5) is provided inside the two mounting portions (102), the first through hole (103), and the connecting portion (104); wherein The protective coating (5) is flush with the elastomer (1).

4. The anti-electromagnetic interference weighing sensor as described in claim 3, characterized in that, The elastic body (1) is symmetrically provided with two pairs of second through holes (106); wherein Two pairs of the second through holes (106) are located on both sides of the mounting portion (102).

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