Sensing steering wheel

Abstract

The invention provides a sensing steering wheel. The sensing steering wheel comprises a steering wheel grip and a sensing layer. The sensing layer is telescopically arranged on the steering wheel grip in a sleeving mode and comprises an elastic substrate layer and an elastic sensor layer arranged on the elastic substrate layer. The elastic sensor layer includes a plurality of sensing lines, a plurality of sensing patterns respectively connected to the plurality of sensing lines, at least one ground line, and a plurality of ground lines branched from the at least one ground line and extending into a plurality of spaces between the plurality of sensing patterns, and each sensing pattern has a mesh structure.

Description

Technical Field

[0001] This invention relates to a sensing device, and more particularly to a sensing steering wheel. Background Technology

[0002] In steering wheels using sensor fabric, a "dead zone" refers to an area without sensors. Dead zones cannot detect touch or pressure and therefore provide no input to the system. Such areas may appear where the steering wheel leather is sewn to other components. During the sewing process, physical obstacles may be created that hinder sensor placement. Furthermore, the stitching itself can interfere with the operation of nearby sensors, causing inaccurate sensor readings or generating erroneous signals. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a sensing steering wheel that addresses the shortcomings of the prior art by using a stretchable material as the substrate of the sensing layer, thereby greatly reducing wrinkles and dead zones.

[0004] To address the aforementioned technical problems, one technical solution adopted by the present invention is to provide a sensing steering wheel, comprising: a steering wheel grip; and a sensing layer retractably sleeved on the steering wheel grip, the sensing layer comprising: an elastic substrate layer; and an elastic sensor layer disposed on the elastic substrate layer, the elastic sensor layer comprising: a plurality of sensing lines; a plurality of sensing patterns respectively connected to the plurality of sensing lines, and each of the sensing patterns having a mesh structure; at least one grounding wire; and a plurality of grounding wires branching from the at least one grounding wire and extending into a plurality of spaces between the plurality of sensing patterns.

[0005] Optionally, the sensing patterns are arranged along a first direction, and each sensing pattern includes: an outer frame connected to a corresponding sensing line, the outer frame having a plurality of recessed portions forming at least one portion of a plurality of spaces between the plurality of sensing patterns; and a plurality of internal wires connected to the outer frame, and the plurality of internal wires intersecting each other to form the mesh structure.

[0006] Optionally, the plurality of grounding conductors branching off from the grounding wire may also extend into at least one portion of the plurality of spaces formed by the plurality of recessed portions.

[0007] Optionally, a plurality of the grounding wires and a plurality of the recessed portions extend along the first direction, and a plurality of the grounding wires branch off from a portion of the at least one grounding wire that extends along a second direction different from the first direction.

[0008] Optionally, the first direction is perpendicular to the second direction.

[0009] Optionally, the elastic sensor layer is formed by printing an elastic conductive material onto the elastic substrate layer.

[0010] Optionally, the plurality of said internal wires are arranged in a continuous wavy shape to form said mesh structure.

[0011] Optionally, the sensing layer further includes a seam area overlapping the plurality of sensing patterns, the sensing layer being a closed ring structure having a plurality of seam portions, and the plurality of seam portions being connected within the seam area.

[0012] Optionally, the sensing steering wheel further includes: a processing circuit electrically connected to the plurality of sensing lines, and the processing circuit receiving at least one sensing signal generated by the plurality of sensing patterns in response to the touch of an object.

[0013] Optionally, the processing circuitry is configured to perform off-hand detection based on at least one of the sensing signals.

[0014] Optionally, the sensing layer may further include a protective layer disposed on the elastic sensor layer.

[0015] To address the aforementioned problems, another technical solution adopted by the present invention is to provide a sensing steering wheel, comprising: a steering wheel grip; a sensing layer retractably sleeved on the steering wheel grip, the sensing layer comprising: an elastic substrate layer; and an elastic sensor layer disposed on the elastic substrate layer, the elastic sensor layer comprising: a plurality of sensing lines; a plurality of sensing patterns respectively connected to the plurality of sensing lines, each of the sensing patterns having a mesh structure and overlapping a seam area of ​​the sensing layer; at least one grounding wire; and a plurality of grounding wires branching from the at least one grounding wire and extending into a plurality of spaces between the plurality of sensing patterns; and a processing circuit electrically connected to the plurality of sensing lines; wherein the sensing layer is a closed ring structure having a plurality of seam portions, and the plurality of seam portions are connected internally at the seam area; wherein the processing circuit is electrically connected to the plurality of sensing lines respectively through a plurality of conductive wires, and the plurality of conductive wires are used to pass through the elastic substrate layer and the elastic sensor layer to sew the plurality of seam portions at the seam area together.

[0016] Optionally, the plurality of the conductive lines are also fixed to the sensing layer by an adhesive material.

[0017] Optionally, the sensing layer further includes: a shielding layer disposed below the elastic substrate layer; and a plurality of heating wires disposed below the shielding layer.

[0018] Optionally, the sensing layer is telescopically fitted onto the steering wheel grip along a third direction, and each of the heating wires is arranged in a series of S-shapes along the third direction.

[0019] Optionally, a plurality of the heating wires are electrically connected to the processing circuit, and the processing circuit is configured to control the plurality of heating wires to heat the sensing steering wheel.

[0020] Optionally, each of the conductive lines is an enameled wire that passes through the elastic substrate layer to enhance the tensile or thrust resistance of the sensing layer.

[0021] To address the aforementioned technical problems, another technical solution adopted by the present invention is to provide a sensing steering wheel, comprising: a steering wheel grip; a sensing layer retractably sleeved on the steering wheel grip, the sensing layer comprising: an elastic substrate layer; and an elastic sensor layer disposed on the elastic substrate layer, the elastic sensor layer comprising: a plurality of sensing lines; and a plurality of sensing patterns connected to the plurality of sensing lines; and a processing circuit electrically connected to the plurality of sensing lines; wherein the sensing layer is a closed ring structure having a plurality of stitched portions, and the plurality of stitched portions are connected within the stitched areas; wherein the processing circuit is electrically connected to the plurality of sensing lines respectively through a plurality of conductive lines, and the plurality of conductive lines are coated with conductive adhesive to conductively bond the plurality of conductive lines to the plurality of sensing patterns in the elastic sensor layer.

[0022] To further understand the features and technical content of the present invention, please refer to the following detailed description and drawings of the present invention. However, the drawings provided are for reference and illustration only and are not intended to limit the present invention. Attached Figure Description

[0023] Figure 1 This is a top view of a sensing steering wheel according to an embodiment of the present invention.

[0024] Figure 2 This is a partial cross-sectional view of a sensing steering wheel according to an embodiment of the present invention.

[0025] Figure 3 This is a cross-sectional schematic diagram of the sensing layer provided in one embodiment of the present invention.

[0026] Figure 4 This is a top view of an elastic sensor layer according to an embodiment of the present invention.

[0027] Figure 5 This is another top view of the elastic sensor layer according to an embodiment of the present invention.

[0028] Figure 6This is another partial cross-sectional schematic diagram of a sensing steering wheel according to an embodiment of the present invention.

[0029] Figure 7 This is a cross-sectional schematic diagram of the sensing circuit layer according to another embodiment of the present invention.

[0030] Figure 8 This is an exploded view of a sensing steering wheel with a stretched sensing layer, according to another embodiment of the present invention.

[0031] Figure 9 This is a top view of a sensing steering wheel according to an embodiment of the present invention.

[0032] Figure 10 For along Figure 9 A schematic diagram of the cross-section of the sensing layer taken by section line AA.

[0033] Figure 11 This is a top view of the sensing layer, flexible printed circuit board (FPC), and processing circuit provided in an embodiment of the present invention.

[0034] Figure 12 for Figure 11 A schematic diagram of the cross-section of the sensing layer taken along section line BB. Detailed Implementation

[0035] The following specific examples illustrate the embodiments of the "sensor steering wheel" disclosed in this invention. Those skilled in the art can understand the advantages and effects of this invention from the content disclosed in this specification. This invention can be implemented or applied through other different specific embodiments, and the details in this specification can also be modified and changed based on different viewpoints and applications without departing from the concept of this invention. Furthermore, the accompanying drawings of this invention are for simple illustrative purposes only and are not depictions of actual dimensions, as stated beforehand. The following embodiments will further describe the relevant technical content of this invention in detail, but the disclosed content is not intended to limit the scope of protection of this invention. Additionally, the term "or" as used herein may include, depending on the actual situation, any combination of any one or more of the associated listed items.

[0036] Figure 1 This is a top view of a sensing steering wheel according to an embodiment of the present invention. Figure 2 This is a partial cross-sectional view of a sensing steering wheel according to an embodiment of the present invention. See also... Figure 1 One embodiment of the present invention provides a sensing steering wheel 1, including a steering wheel grip 10 and a sensing layer 12. The sensing layer 12 is retractably sleeved on the steering wheel grip 10.

[0037] exist Figure 1 and Figure 2 In one embodiment, the steering wheel grip 10 may be the rim of the sensing steering wheel 1, which may be connected to a hub located at the center of the rim via one or more spokes.

[0038] like Figure 2 As shown, the sensing steering wheel 1 is provided with a steering wheel grip 10 and a sensing layer 12 from the inside to the outside. The steering wheel grip 10 may be annular and includes a frame 100 and an inner protective layer 102. The sensing layer 12 includes an elastic base layer 120, an elastic sensor layer 122 and an outer protective layer 124.

[0039] The frame 100 may be made of rigid materials such as metal or wood, while the inner protective layer 102 may include, for example, a leather layer and / or a foam material layer.

[0040] refer to Figure 3 , Figure 4 . Figure 3 This is a cross-sectional schematic diagram of the sensing layer provided in one embodiment of the present invention. Figure 4 This is a top view of an elastic sensor layer according to an embodiment of the present invention. Figure 3 As shown, for ease of explanation, the sensing layer 12 is presented as a flat, multi-layered structure. The elastic substrate layer 120 can be made of elastic materials such as thermoplastic polyurethane (TPU), thermoplastic vulcanized rubber, or thermoplastic rubber, and has opposing first surfaces S1 and second surfaces S2. TPU or other stretchable materials can be used as the substrate to give the sensing layer 12 stretchability, thus greatly reducing wrinkles when the sensing layer 12 is fitted onto the steering wheel grip 10.

[0041] The elastic sensor layer 122 can be disposed on the elastic substrate layer 120. (Reference) Figure 4 The elastic sensor layer 122 may include one or more sensing lines, one or more sensing patterns, and one or more ground lines. For example, the elastic sensor layer 122 includes sensing lines SL1, SL2, SL3, sensing patterns Ps1, Ps2, Ps3, and ground line GL, and the elastic sensor layer 122 including sensing lines SL1, SL2, SL3, sensing patterns Ps1, Ps2, Ps3, and ground line GL can be formed by printing an elastic conductive material on the elastic substrate layer 120.

[0042] It should be noted that the elastic sensor layer 122 may include multiple sensing areas arranged on the annular surface of the steering wheel grip 10, and the sensing patterns may be arranged according to the positions of the sensing areas. For example, one or more sensing patterns may be provided in a sensing area, or a sensing pattern may overlap with multiple sensing areas, but the present invention is not limited thereto.

[0043] Sensing patterns Ps1, Ps2, and Ps3 are connected to sensing lines SL1, SL2, and SL3, respectively. Each of the sensing patterns Ps1, Ps2, and Ps3 has a grid structure. For example, in this embodiment, sensing patterns Ps1, Ps2, and Ps3 are arranged along a first direction D1. Sensing pattern Ps1 is disposed within the sensing region SA1 and includes an outer frame FO and multiple internal wires WI. The outer frame FO substantially fills the sensing region SA1 and is connected to the corresponding sensing line, such as sensing line SL1.

[0044] Furthermore, multiple internal wires WI are connected to the outer frame FO. In this embodiment, the internal wires WI are inclined relative to the outer frame FO and intersect each other to form a mesh structure. However, the present invention is not limited thereto. Figure 5 This is another top view of the elastic sensor layer according to an embodiment of the present invention. See also... Figure 5 Each internal conductor WI has a continuous wavy shape to form a mesh structure. For example... Figure 4 and 5 As shown, the use of a mesh structure can avoid the problem of sensor area failure due to the failure of a single line segment in the area.

[0045] A grounding wire GL is formed to surround the sensing pattern Ps1. For example, a first portion of the grounding wire GL may extend along the second direction D2 and be disposed between the sensing patterns Ps1 and Ps3, and a second portion of the grounding wire GL may extend along the second direction D2 and be disposed between the sensing patterns Ps1 and Ps2. Providing the grounding wire GL can enhance the capacitive coupling between the sensing pattern and the detected object (e.g., a driver's hand), thereby increasing the sensitivity of the sensing layer 12 to finger touch.

[0046] In this embodiment, the outer frame FO further defines a plurality of recesses, such as recesses RP1 to RP5 within the sensing region SA1. Recesses RP2 to RP5 form part of the space between sensing patterns Ps1 and Ps3, and recess RP1 forms part of the space between sensing patterns Ps1 and Ps2.

[0047] Furthermore, each of the recessed portions RP1 to RP5 forms a rectangular space extending along the first direction D1, and multiple grounding wires GW branch out from the first and second portions of the grounding wire GL, respectively, and extend into multiple spaces between the sensing patterns Ps1, Ps2, and Ps3, more specifically, into the rectangular spaces formed by the recessed portions RP1 to RP5. The grounding wires GW extend along a second direction D2, which is different from the first direction D1. In this case, the first direction D1 is perpendicular to the second direction D2.

[0048] Therefore, setting a grounding wire GW can increase the density and uniformity of multiple grounding areas between multiple sensing patterns, thereby further enhancing the capacitive coupling between the sensing pattern and the object being detected, and thus further improving the sensing performance (e.g., sensitivity) of the sensing layer 12.

[0049] Specifically, the elastic sensing layer 122 can be formed by printing an elastic conductive paste (e.g., silver paste) on the first surface S1 of the elastic substrate layer 120, so as to form a sensor with one or more sensing regions by arranging the sensing patterns Ps1, Ps2, and Ps3. It is worth noting that both the elastic substrate layer 120 and the elastic sensor layer 122 are stretchable and can withstand a certain degree of external force without damaging the sensing lines SL1, SL2, SL3, the sensing patterns Ps1, Ps2, and Ps3, and the grounding wire GL.

[0050] Please refer to Figure 2 The outer protective layer 124 is made of ink, for example, which can provide protection and insulation for the elastic sensor layer 122 to improve its durability.

[0051] See Figure 1 The sensing steering wheel 1 also includes a processing circuit 14, which is electrically connected to the sensing lines of the elastic sensor layer 122. The processing circuit 14 receives sensing signals generated when the sensing pattern is touched by an object.

[0052] In some embodiments, the processing circuit 14 may be a processor or a controller, which may be configured to perform hands-off detection based on received sensing signals. Sensing signals are generated when the driver touches one or more sensing areas on the sensing steering wheel 1.

[0053] When a driver's hand touches a sensing area, it changes the electric field of that specific area. This change can be detected and converted into a sensing signal. The processing circuit 14 can then interpret these signals to determine which specific sensing area the driver has touched. This information can be used for various purposes, such as hands-off detection, where the processing circuit 14 can detect whether the driver has placed their hands on the sensing steering wheel 1.

[0054] In addition, the sensing layer 12 also includes a stitched area Ase that overlaps with the sensing pattern. The sensing wires can be connected at the stitched area Ase to a plurality of conductive wires CW, which serve as lead wires, to be electrically connected to the processing circuit 14.

[0055] Figure 6 This is another partial cross-sectional schematic diagram of a sensing steering wheel according to an embodiment of the present invention. (See reference) Figure 1 , Figure 6The sensing layer 12 has a closed ring structure with a suture portion Pse, which is connected within the suture region Ase. Multiple conductive wires CW are used to pass through the elastic substrate layer 120 and the elastic sensor layer 122 to sew the suture portion Pse together at the suture region Ase.

[0056] The conductive wires CW can be enameled wire, single-core wire, or other conductive wires, which can repeatedly penetrate the elastic substrate layer 120 and the elastic sensor layer 122 to increase the strength of the sensing layer 12. For example, each conductive wire CW can be enameled wire and penetrate the elastic substrate layer 120 to increase the strength of the sensing layer 12 against tensile or thrust forces. In addition, through the application of printing technology, conductive silver paste can be impregnated into the sensing layer 12, thereby reducing the range of dead zones and ensuring accurate detection even if the driver's hand comes into contact with the stitched area Ase on the sensing steering wheel 1.

[0057] In addition, conductive adhesive can be applied to the conductive wire CW to conductively bond the conductive wire CW to the sensing pattern in the elastic sensor layer 122. The black adhesive, as part of the outer protective layer 124, can also serve as a protective layer for the conductive adhesive.

[0058] Figure 7 This is a cross-sectional schematic diagram of the sensing circuit layer according to another embodiment of the present invention. In this embodiment, the structure of the sensing steering wheel 2 is similar to... Figure 1 , Figure 2 The sensor steering wheel 1 mentioned above has a similar structure. See [link / reference]. Figure 7 For ease of explanation, the sensing circuit layer 22 is shown as a flat multi-layer structure. The sensing circuit layer 22 includes an elastic base layer 220, an elastic sensor layer 222, an outer protective layer 224, a shielding layer 226, and multiple heating wires 228.

[0059] It should be noted that the details of the elastic substrate layer 220, the elastic sensor layer 222, and the outer protective layer 224 are basically the same as those of the elastic substrate layer 120, the elastic sensor layer 122, and the outer protective layer 124, so they will not be described again here.

[0060] and Figure 5 Similarly, the sensing layer 22 has a closed ring structure with stitch portions Pse, which are interconnected at the stitch region Ase. Conductive wires CW are used to pass through the elastic substrate layer 220 and the elastic sensor layer 222 to stitch the stitch portions Pse together at the stitch region Ase.

[0061] In addition, the shielding layer 226 is located below the elastic substrate layer 220, and the heating wire 228 is located below the shielding layer 226.

[0062] The shielding layer 226 can be formed on the second surface S2 of the elastic substrate layer 220 by printing an elastic conductive material such as graphene or conductive silver paste. It is worth mentioning that since the shielding layer 226 is made of an elastic conductive material, it can serve as an electrical shielding layer between the elastic sensor layer 222 and the heating wire 228, thereby providing anti-interference capability for the elastic sensor layer 222.

[0063] The heating wire 228 can be a conductive wire, such as an enameled wire, a single-core wire or other conductive wire with a designed resistance value, and can be disposed under the shielding layer 226.

[0064] Figure 8 This is an exploded view of a sensing steering wheel with a stretched sensing layer according to another embodiment of the present invention. (See also...) Figure 8 The sensor steering wheel 2 also includes a processing circuit 24, and multiple sensor lines can be connected to multiple conductive lines CW respectively to be electrically connected to the processing circuit 24.

[0065] The processing circuit 24 is also electrically connected to the heating wire 228 via multiple heating wires HL. The processing circuit 24 can be used to control the heating wire 228 to heat the sensing steering wheel 2.

[0066] Furthermore, such as Figure 8 As shown, the sensing layer 22 is retractable along a third direction D3 to be retractably fitted onto the steering wheel grip 20, and the heating wires 228 are arranged in a continuous S-shape along the third direction D3. In other words, considering the limitations of the sensing layer 22 in unidirectional stretching, the heating wires 228 can be configured as multiple transverse S-shaped or multiple V-shaped patterns. This configuration ensures that the sensing layer 22 has sufficient stretch length when stretched. However, the above details are disclosed for illustrative purposes only and are not intended to limit the scope of this disclosure.

[0067] refer to Figure 9 , Figure 10 . Figure 9 This is a top view of a sensing steering wheel according to an embodiment of the present invention. Figure 10 For along Figure 9 A schematic diagram of the cross-section of the sensing layer, taken by section line AA. (See diagram below.) Figure 9 As shown, for ease of explanation, the sensing layer 32 is depicted as a flat structure. The elastic substrate layer 320 can be made of elastic materials such as TPU, thermoplastic vulcanizate, or thermoplastic rubber, and has opposing first surfaces S1 and second surfaces S2. TPU or other stretchable materials can be used as the substrate to give the sensing layer 12 stretchability, which can greatly reduce the formation of wrinkles when the sensing layer 32 is fitted onto the steering wheel grip 10.

[0068] refer to Figure 9 , Figure 10Multiple sensing lines SL4 can be formed on the first surface S1 of the elastic substrate layer 320, but for ease of explanation, Figure 9 Only one sensing line SL4 is shown. The sensing line SL4 can be adhered to the elastic substrate layer 320 by adhesive dispensing at multiple fixing points arranged along the setting path corresponding to the sensing line SL4. It should be noted that there can be a predetermined distance between two adjacent fixing points, but the present invention is not limited thereto.

[0069] refer to Figure 10 The adhesive 325 may be a colloid and formed to surround the sensing wire SL4. The sensing wire SL4 may be an enameled wire, comprising a conductive metal wire SL41 and an insulating layer SL42. Notably, the material of the adhesive 325 may be selected to provide a first-order adhesion between the adhesive 325 and the elastic substrate layer 320 and a second-order adhesion between the adhesive 325 and the insulating layer SL42.

[0070] It is worth noting that the first-order adhesion is higher than the second-order adhesion. This allows the adhesive 325 to be stably fixed to the elastic substrate layer 320, while the sensing circuit SL4 can move slightly relative to the adhesive 325, preventing the sensing circuit SL4 from breaking due to stretching of the elastic substrate layer 320. More specifically, the adhesive 325 can be selected from materials that form weak chemical bonds with the insulating layer SL42 or do not form chemical bonds.

[0071] Furthermore, the sensing lines SL4 can be arranged in a continuous S-shape along a predetermined path. In other words, given the limitations of the sensing layer 32 in unidirectional stretching, the sensing lines SL4 can be configured as a transverse S-shaped or V-shaped pattern. This configuration ensures that the sensing layer 320 has sufficient stretch length when stretched.

[0072] refer to Figure 11 , Figure 12 . Figure 11 This is a top view of the sensing layer, flexible printed circuit board (FPC), and processing circuit provided in an embodiment of the present invention. Figure 12 for Figure 11 A schematic diagram of the cross-section of the sensing layer taken along section line BB.

[0073] like Figure 11 As shown, the processing circuit 34 can be a chip disposed on the elastic substrate 320, and the FPC 36 can be disposed between the processing circuit 34 and the elastic substrate 320. The conductive line CW for connecting the processing circuit 34 and the sensing line can be made of silver paste and formed on the elastic substrate 320. The FPC 36 includes a conductive layer 360, such as a flexible copper foil, and the conductive layer 360 has bonding pads 361 for connecting to the conductive line CW and the processing circuit 34, respectively.

[0074] In some embodiments, a conductive material 37, such as silver paste, may be disposed between the bonding pad 361 and the conductive line CW. Furthermore, a flexible support layer 38 may be disposed between the FPC 36 and the elastic substrate layer 320. The flexible support layer 38 can be used to support the FPC 36 and serve as a buffer layer to prevent damage to the FPC 36.

[0075] Beneficial effects of the embodiments

[0076] In summary, the sensing steering wheel provided by this invention utilizes a mesh structure to avoid the problem of sensor failure in a certain area due to the failure of a single line segment within that area.

[0077] In addition, the placement of grounding wires and grounding conductors can enhance the capacitive coupling between the sensing pattern and the object being detected, and increase the density and uniformity of multiple grounding areas between the sensing patterns, thereby increasing the sensitivity of the sensing layer.

[0078] In addition, the conductive wires, as lead-out wires of the sensing wires, can repeatedly pass through the elastic substrate layer and the elastic sensor layer, increasing the strength of the sensing layer.

[0079] The content disclosed above is only a preferred and feasible embodiment of the present invention, and is not intended to limit the scope of protection of the claims of the present invention. Therefore, all equivalent technical changes made based on the content of the present invention specification and drawings are included within the scope of protection of the claims of the present invention.

Claims

1. A sensing steering wheel, characterized in that, The aforementioned sensor steering wheel includes: A steering wheel grip; and A sensing layer, retractably fitted onto the steering wheel grip, the sensing layer comprising: An elastic substrate layer; and An elastic sensor layer is disposed on the elastic substrate layer, the elastic sensor layer comprising: Multiple sensor lines; Multiple sensing patterns are connected to multiple sensing lines, and each sensing pattern has a mesh structure. At least one grounding wire; and Multiple grounding wires branch off from at least one of the grounding wires and extend into multiple spaces between multiple sensing patterns.

2. The sensing steering wheel according to claim 1, characterized in that, The sensing patterns are arranged along a first direction, and each sensing pattern includes: An outer frame connected to a corresponding sensing line, the outer frame having a plurality of recessed portions forming at least one portion of a plurality of spaces between a plurality of sensing patterns; and Multiple internal wires are connected to the outer frame, and the multiple internal wires intersect each other to form the mesh structure.

3. The sensing steering wheel according to claim 2, characterized in that, The plurality of grounding conductors branching off from the grounding wire also extend into at least one portion of the plurality of spaces formed by the plurality of recessed portions.

4. The sensing steering wheel according to claim 2, characterized in that, The plurality of grounding wires and the plurality of recessed portions extend along the first direction, and the plurality of grounding wires branch off from the portion of the at least one grounding wire that extends along a second direction different from the first direction.

5. The sensing steering wheel according to claim 4, characterized in that, The first direction is perpendicular to the second direction.

6. The sensing steering wheel according to claim 1, characterized in that, The elastic sensor layer is formed by printing an elastic conductive material onto the elastic substrate layer.

7. The sensing steering wheel according to claim 2, characterized in that, The internal conductors are arranged in a continuous wavy shape to form the mesh structure.

8. The sensing steering wheel according to claim 1, characterized in that, The sensing layer further includes a seam area that overlaps with the plurality of sensing patterns. The sensing layer is a closed ring structure with a plurality of seam portions, and the plurality of seam portions are connected within the seam area.

9. The sensing steering wheel according to claim 8, characterized in that, The sensor steering wheel also includes: A processing circuit is electrically connected to a plurality of said sensing lines, and the processing circuit receives at least one sensing signal generated by the plurality of said sensing patterns in response to the touch of an object.

10. The sensing steering wheel according to claim 9, characterized in that, The processing circuit is configured to perform off-hand detection based on at least one of the sensor signals.

11. The sensing steering wheel according to claim 1, characterized in that, The sensing layer also includes a protective layer disposed on the elastic sensor layer.

12. A sensing steering wheel, characterized in that, The aforementioned sensor steering wheel includes: A steering wheel grip; A sensing layer, retractably fitted onto the steering wheel grip, the sensing layer comprising: An elastic substrate layer; and An elastic sensor layer is disposed on the elastic substrate layer, the elastic sensor layer comprising: Multiple sensor lines; Multiple sensing patterns are respectively connected to multiple sensing lines, and each sensing pattern has a mesh structure and overlaps with a seam area of ​​the sensing layer. At least one grounding wire; and Multiple grounding wires branch off from at least one of the grounding wires and extend into multiple spaces between the multiple sensing patterns; and A processing circuit is electrically connected to the plurality of said sensing lines; The sensing layer is a closed ring structure with multiple suture portions, and the multiple suture portions are connected within the suture area. The processing circuit is electrically connected to a plurality of sensing lines via a plurality of conductive lines, and the plurality of conductive lines are used to pass through the elastic substrate layer and the elastic sensor layer to sew together the plurality of suture portions in the suture area.

13. The sensing steering wheel according to claim 12, characterized in that, The conductive wires are also fixed to the sensing layer by an adhesive material.

14. The sensing steering wheel according to claim 13, characterized in that, The sensing layer further includes: A shielding layer is disposed beneath the elastic substrate layer; and Multiple heating wires are disposed below the shielding layer.

15. The sensing steering wheel according to claim 14, characterized in that, The sensing layer extends and fits onto the steering wheel grip along a third direction, and the heating wires are arranged in a series of S-shapes along the third direction.

16. The sensing steering wheel according to claim 14, characterized in that, The plurality of heating wires are electrically connected to the processing circuit, and the processing circuit is configured to control the plurality of heating wires to heat the sensing steering wheel.

17. The sensing steering wheel according to claim 13, characterized in that, Each of the conductive wires is an enameled wire that passes through the elastic substrate layer to enhance the tensile or thrust resistance of the sensing layer.

18. A sensing steering wheel, characterized in that, The aforementioned sensor steering wheel includes: A steering wheel grip; A sensing layer, retractably fitted onto the steering wheel grip, the sensing layer comprising: An elastic substrate layer; and An elastic sensor layer is disposed on the elastic substrate layer, the elastic sensor layer comprising: Multiple sensor lines; and Multiple sensor patterns, connected to multiple sensor lines; and A processing circuit is electrically connected to the plurality of said sensing lines; The sensing layer is a closed ring structure with multiple suture portions, and the multiple suture portions are connected within the suture area. The processing circuit is electrically connected to multiple sensing lines via multiple conductive lines, and the multiple conductive lines are coated with conductive adhesive to conductively bond the multiple conductive lines to multiple sensing patterns in the elastic sensor layer.

19. The sensing steering wheel according to claim 18, characterized in that, Each of the conductive wires is an enameled wire that passes through the elastic substrate layer to enhance the tensile or thrust resistance of the sensing layer.

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