Steering wheel, detection device for steering wheel and vehicle

Abstract

The utility model relates to a steering wheel, a detection device for the steering wheel and a vehicle. The steering wheel (100) comprises: a steering wheel body (1); the first sensing layer (2) is arranged on the radial outer side of the steering wheel body (1) and used for sensing the change of an external electric field and generating a detection capacitance value; the second sensing layer (3) is arranged between the steering wheel body (1) and the first sensing layer (2) and is used for generating a reference capacitance value; the first shielding layer (4) is arranged between the steering wheel body (1) and the second induction layer (3) and used for shielding the effect of an external electric field on the second induction layer (3); and the second shielding layer (5) is arranged between the first induction layer (2) and the second induction layer (3) and is used for shielding the effect of an external electric field on the second induction layer (3). Therefore, whether the steering wheel slips out of the hand or not can be accurately and reliably detected, accurate information is provided for an auxiliary driving system, and the driving safety is improved.

Description

Technical Field

[0001] The present disclosure relates to the technical field of assisted driving, and in particular, to a steering wheel, a detection device for a steering wheel, and a vehicle. Background Art

[0002] With the rapid development of vehicle technology, current vehicles usually have assisted driving systems, which can assist the driver in controlling the operation of the vehicle. When the assisted driving system is in operation, the driver is required to maintain control of the vehicle at all times, that is, the driver's hands are always in contact with the steering wheel. If the driver's hands are off the steering wheel, the driver may not be able to take over the vehicle in time when a dangerous situation that the system cannot handle occurs. Therefore, it is necessary to accurately and reliably detect whether the user's hands are off the steering wheel. Utility Model Content

[0003] The purpose of the present invention is to provide a steering wheel, a detection device for a steering wheel and a vehicle, which can accurately and reliably detect whether the steering wheel is out of hand, provide accurate information for an auxiliary driving system, and improve driving safety.

[0004] In order to achieve the above object, the present disclosure provides a steering wheel, the steering wheel comprising:

[0005] Steering wheel body;

[0006] A first sensing layer is disposed on the radial outer side of the steering wheel body and is used to sense changes in an external electric field and generate a detection capacitance value;

[0007] A second sensing layer, disposed between the steering wheel body and the first sensing layer, for generating a reference capacitance value;

[0008] A first shielding layer, disposed between the steering wheel body and the second sensing layer, for shielding the second sensing layer from an external electric field; and

[0009] The second shielding layer is disposed between the first induction layer and the second induction layer, and is used for shielding the second induction layer from the effect of an external electric field.

[0010] Optionally, the steering wheel further includes a heating layer, which is disposed between the steering wheel body and the first shielding layer and is used for heating the steering wheel.

[0011] Optionally, the steering wheel also includes an insulating layer, and the insulating layer is arranged at at least one of the following locations: between the steering wheel body and the heating layer, between the heating layer and the first shielding layer, between the first shielding layer and the second sensing layer, between the second sensing layer and the second shielding layer, and between the second shielding layer and the first sensing layer.

[0012] Optionally, the steering wheel further includes a skin layer, wherein the skin layer is arranged at the outermost layer in the radial direction of the steering wheel, and the insulating layer is arranged between the skin layer and the first sensing layer.

[0013] The present disclosure also provides a detection device for a steering wheel, which is used to detect the above-mentioned steering wheel, and the detection device comprises:

[0014] A detection module, connected to the first sensing layer and the second sensing layer, for collecting a detection capacitance value of the first sensing layer and a reference capacitance value of the second sensing layer and transmitting the collections to a controller;

[0015] The controller is connected to the detection module and is used to determine whether the steering wheel is out of hand based on the received detection capacitance value and reference capacitance value.

[0016] Optionally, the detection module is connected to a plurality of regions in the first sensing layer respectively, and is used to collect detection capacitance values ​​of the plurality of regions in the first sensing layer;

[0017] The controller is further configured to determine the grip posture of the driver's hand according to the detection capacitance values ​​of the plurality of regions in the first sensing layer and the reference capacitance value of the second sensing layer.

[0018] Optionally, the multiple regions in the first sensing layer are arranged horizontally or vertically.

[0019] Optionally, the detection module is respectively connected to a plurality of regions in the second sensing layer, and is used to collect reference capacitance values ​​of the plurality of regions in the second sensing layer;

[0020] The controller is further configured to determine the grip posture of the driver's hand according to the detection capacitance values ​​of the plurality of regions in the first sensing layer and the reference capacitance values ​​of the plurality of regions in the second sensing layer.

[0021] Optionally, the multiple regions in the second sensing layer are arranged horizontally or vertically.

[0022] Optionally, the steering wheel further includes a heating layer, which is disposed between the steering wheel body and the first shielding layer and is used to heat the steering wheel, and the detection device further includes:

[0023] A voltage conversion module, connected to the controller, for converting the voltage of the external direct current and providing it to the controller;

[0024] The voltage conversion module is also connected to the heating layer, and is also used to convert the voltage of the external direct current and provide it to the heating layer.

[0025] Optionally, the detection device further includes:

[0026] a temperature acquisition module, disposed inside the steering wheel, connected to the voltage conversion module and the controller respectively, for acquiring the temperature of the steering wheel and transmitting the acquired temperature to the controller;

[0027] The voltage conversion module is also used to convert the voltage of the external direct current and provide it to the temperature acquisition module.

[0028] Optionally, the detection module includes a capacitive sensor.

[0029] Optionally, the temperature acquisition module includes a thermistor.

[0030] The present disclosure also provides a vehicle, comprising the above-mentioned steering wheel or the above-mentioned detection device.

[0031] Through the above technical solution, the first sensing layer of the steering wheel is arranged on the radial outer side of the steering wheel body, the second sensing layer is arranged between the steering wheel body and the first sensing layer, and the first shielding layer and the second shielding layer are arranged on both sides of the second sensing layer. When the steering wheel of this solution is detected to be out of hand, the first shielding layer and the second shielding layer can shield the electric field in the radial direction of the steering wheel body, so that the reference capacitance value of the second sensing layer does not change with the change of the contact state between the user's hand and the steering wheel. The detection capacitance value of the first sensing layer changes with the change of the contact state between the user's hand and the steering wheel. In this way, the changes in the reference capacitance value and the detection capacitance value can be considered at the same time to determine whether the user's hand is in contact with the steering wheel, so that it can more accurately and reliably detect whether the steering wheel is out of hand, provide accurate information for the auxiliary driving system, and improve driving safety.

[0032] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present disclosure but do not constitute a limitation of the present disclosure. In the accompanying drawings:

[0034] Figure 1 is a schematic diagram of a steering wheel according to an exemplary embodiment.

[0035] Figure 2 is a schematic diagram of a steering wheel according to another exemplary embodiment.

[0036] Figure 3 The figure is a schematic diagram showing a detection device for a steering wheel according to an exemplary embodiment.

[0037] Figure 4is a schematic diagram of a detection device for a steering wheel according to another exemplary embodiment.

[0038] Figure 5 is a schematic diagram showing a detection device for a steering wheel according to yet another exemplary embodiment.

[0039] Figure 6 is a schematic diagram showing a detection device for a steering wheel according to yet another exemplary embodiment.

[0040] Figure 7 The figure is a schematic diagram showing a steering wheel area division according to an exemplary embodiment.

[0041] Figure 8 is a schematic diagram showing a detection device for a steering wheel according to yet another exemplary embodiment.

[0042] Fig. 9 is a schematic diagram showing a steering wheel area division according to another exemplary embodiment.

[0043] Fig.10 is a schematic diagram showing a detection device for a steering wheel according to yet another exemplary embodiment.

[0044] Fig.11 is a schematic diagram showing a detection device for a steering wheel according to yet another exemplary embodiment.

[0045] Description of Reference Numerals

[0046] 1 Steering wheel body 2 First sensing layer 3 Second sensing layer

[0047] 4 First shielding layer 5 Second shielding layer 6 Heating layer

[0048] 7 epidermis 8 insulation layer 100 steering wheel

[0049] 200 Detection device 201 Detection module 202 Controller

[0050] 203 voltage conversion module 204 temperature acquisition module DETAILED DESCRIPTION

[0051] The specific implementation of the present disclosure is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described herein is only used to illustrate and explain the present disclosure, and is not used to limit the present disclosure.

[0052] Figure 1 FIG. 1 is a schematic diagram of a steering wheel according to an exemplary embodiment. Figure 1As shown, the steering wheel 100 includes a steering wheel body 1 , a first sensing layer 2 , a second sensing layer 3 , a first shielding layer 4 and a second shielding layer 5 .

[0053] The first sensing layer 2 is disposed on the radially outer side of the steering wheel body 1 and is used to sense changes in the external electric field and generate a detection capacitance value.

[0054] The second sensing layer 3 is disposed between the steering wheel body 1 and the first sensing layer 2 and is used to generate a reference capacitance value.

[0055] The first shielding layer 4 is disposed between the steering wheel body 1 and the second sensing layer 3 to shield the second sensing layer 3 from the external electric field. The second shielding layer 5 is disposed between the first sensing layer 2 and the second sensing layer 3 to shield the second sensing layer 3 from the external electric field.

[0056] In this solution, the first shielding layer 4, the second sensing layer 3, the second shielding layer 5 and the first sensing layer 2 are sequentially arranged along the radial outward direction of the steering wheel body 1.

[0057] Exemplarily, the first sensing layer 2 and the second sensing layer 3 may be metal conductive fabrics or metal wires. When the ambient temperature changes, the resistance of the first sensing layer 2 and the second sensing layer 3 changes. When the steering wheel 100 is detected to be out of hand, the capacitance of the first sensing layer 2 and the second sensing layer 3 changes.

[0058] The first sensing layer 2 can sense changes in the external electric field. When the contact state between the user's hand and the steering wheel 100 changes, the electric field between the user's hand and the first sensing layer 2 changes, and the detection capacitance value of the first sensing layer 2 changes.

[0059] The first shielding layer 4 and the second shielding layer 5 are respectively arranged on both sides of the second sensing layer 3. The second shielding layer 5 can shield the influence of the user's hand on the capacitance value of the second sensing layer 3, and the first shielding layer 4 can shield the influence of the electric field in the direction of the steering wheel body 1 on the capacitance value of the second sensing layer 3, so that the capacitance value of the second sensing layer 3 has nothing to do with whether the user's hand touches the steering wheel 100.

[0060] The difference between the detection capacitance value and the reference capacitance value reflects whether the contact state between the user's hand and the steering wheel has changed. When performing hands-off detection on the steering wheel 100, whether the steering wheel is off-hand can be reliably and accurately detected based on the detection capacitance value and the reference capacitance value.

[0061] The capacitance value of the first sensing layer 2 is also related to the ambient temperature. Changes in ambient temperature cause changes in the resistance value of the first sensing layer 2, thereby changing the capacitance value collected by the first sensing layer 2. It is easy to misjudge that the change is caused by a change in the contact state between the user's hand and the steering wheel 100.

[0062] Changes in ambient temperature will also cause changes in the resistance of the second sensing layer 3, thereby changing the capacitance value collected by the second sensing layer 3. The capacitance value of the second sensing layer 3 is used as a reference value. Since the capacitance values ​​of the first sensing layer 2 and the second sensing layer 3 caused by ambient temperature change in the same magnitude, the difference between the reference capacitance value and the detection capacitance value has nothing to do with the ambient temperature. In this way, the difference between the detection capacitance value and the reference capacitance value reflects whether the contact state between the user's hand and the steering wheel has changed.

[0063] Through the above technical solution, the first sensing layer of the steering wheel is arranged on the radial outer side of the steering wheel body, the second sensing layer is arranged between the steering wheel body and the first sensing layer, and the first shielding layer and the second shielding layer are arranged on both sides of the second sensing layer. When the steering wheel of this solution is detected to be out of hand, the first shielding layer and the second shielding layer can shield the electric field in the radial direction of the steering wheel body, so that the reference capacitance value of the second sensing layer does not change with the change of the contact state between the user's hand and the steering wheel. The detection capacitance value of the first sensing layer changes with the change of the contact state between the user's hand and the steering wheel. In this way, the changes in the reference capacitance value and the detection capacitance value can be considered at the same time to determine whether the user's hand is in contact with the steering wheel, so that it can more accurately and reliably detect whether the steering wheel is out of hand, provide accurate information for the auxiliary driving system, and improve driving safety.

[0064] Figure 2 FIG. 1 is a schematic diagram of a steering wheel according to another exemplary embodiment. Figure 2 As shown, the steering wheel 100 further comprises a heating layer 6 .

[0065] The heating layer 6 is disposed between the steering wheel body 1 and the first shielding layer 4 and is used for heating the steering wheel 100 .

[0066] The heating layer 6 is arranged radially outside the steering wheel body 1, and the heating layer 6 can generate heat when powered on. The heating layer 6 generates current when powered on, thereby changing the electric field in the radial direction of the steering wheel body 1. The heating layer 6 is arranged between the steering wheel body 1 and the first shielding layer 4, so as to shield the influence of the heating layer 6 on the reference capacitance value of the second sensing layer 3.

[0067] Exemplarily, the heating layer 6 may be a metal wire having a heating function.

[0068] In this implementation, the heating layer is disposed between the steering wheel body and the first shielding layer, which can shield the influence of the heating layer on the reference capacitance value of the second sensing layer.

[0069] In yet another embodiment, the steering wheel 100 further includes an insulating layer 8, and the insulating layer 8 is disposed at at least one of the following:

[0070] between the steering wheel body 1 and the heating layer 6 , between the heating layer 6 and the first shielding layer 4 , between the first shielding layer 4 and the second sensing layer 3 , between the second sensing layer 3 and the second shielding layer 5 , and between the second shielding layer 5 and the first sensing layer 2 .

[0071] Exemplarily, an insulating layer 8 may be disposed between the first shielding layer 4 and the second sensing layer 3 , and an insulating layer 8 may be disposed between the second sensing layer 3 and the second shielding layer 5 .

[0072] Reference Figure 2 When an insulating layer 8 is provided between the above-mentioned layers, the insulating layer 8 can electrically insulate between the steering wheel body 1 and the heating layer 6, between the heating layer 6 and the first shielding layer 4, between the first shielding layer 4 and the second sensing layer 3, between the second sensing layer 3 and the second shielding layer 5, and between the second shielding layer 5 and the first sensing layer 2.

[0073] Exemplarily, the insulating layer 8 may be made of a material having electrical insulating properties, such as rubber, plastic, and the like.

[0074] In this embodiment, an insulating layer is provided between the layers to insulate the layers and prevent the capacitance of the first sensing layer and the second sensing layer from being affected by the current generated between the layers.

[0075] In another embodiment, the steering wheel 100 further includes a skin layer 7 , which is disposed at the outermost layer in the radial direction of the steering wheel 100 , and an insulating layer 8 is disposed between the skin layer 7 and the first sensing layer 2 .

[0076] The epidermis layer is arranged at the radial outermost layer of the steering wheel 100. In this embodiment, a heating layer 6, a first shielding layer 4, a second sensing layer 3, a second shielding layer 5, a first sensing layer 2 and an epidermis layer 7 are arranged in sequence along the radial direction of the steering wheel body 1.

[0077] Exemplarily, the skin layer 7 may be synthetic plastic, leather, genuine leather, or the like.

[0078] In this embodiment, an insulating layer is provided between the epidermis layer and the first sensing layer to insulate the epidermis layer from the first sensing layer, thereby preventing the current generated between the epidermis layer and the first sensing layer from affecting the capacitance value of the first sensing layer.

[0079] Figure 3 FIG. 2 is a schematic diagram of a detection device for a steering wheel according to an exemplary embodiment. The detection device 200 is used to detect the steering wheel 100. Figure 3 As shown, the detection device 200 includes a detection module 201 and a controller 202 .

[0080] The detection module 201 is connected to the first sensing layer 2 and the second sensing layer 3 , and is used to collect the detection capacitance value of the first sensing layer 2 and the reference capacitance value of the second sensing layer 3 and transmit them to the controller 202 .

[0081] The controller 202 is connected to the detection module 201 and is used to determine whether the steering wheel 100 is out of the hands according to the received detection capacitance value and reference capacitance value.

[0082] For example, the controller 202 may be an electronic control unit (ECU) connected to an external DC power source Vcc.

[0083] The detection capacitance value of the first sensing layer 2 and the reference capacitance value of the second sensing layer 3 can be collected in real time or periodically (for example, once every 3 seconds) by the detection module 201. After receiving the detection capacitance value and the reference capacitance value, the controller 202 can determine whether the steering wheel 100 is out of hand according to the detection capacitance value and the reference capacitance value. The method by which the controller 202 determines whether the steering wheel is out of hand according to the difference between the detection capacitance value and the reference capacitance value is a method well known to those skilled in the art. For example, the controller 202 can determine whether the steering wheel 100 is out of hand by judging whether the difference between the detection capacitance value and the reference capacitance value is greater than a predetermined difference threshold. Therefore, the program executed by the controller 202 has no methodological improvement.

[0084] Through the above technical solution, the detection device for the steering wheel includes a controller and a detection module. The controller is connected to the detection module, and the detection module is connected to the first sensing layer and the second sensing layer. In this way, the controller can determine whether the steering wheel is out of hand based on the detection capacitance value of the first sensing layer and the reference capacitance value of the second sensing layer collected by the detection module, and the circuit is simple and reliable.

[0085] In yet another embodiment, the steering wheel 100 further includes a heating layer 6 disposed between the steering wheel body 1 and the first shielding layer 4 for heating the steering wheel 100 . Figure 4 FIG. 1 is a schematic diagram of a detection device for a steering wheel according to another exemplary embodiment. Figure 4 As shown, the detection device 200 further includes a voltage conversion module 203 .

[0086] The voltage conversion module 203 is connected to the controller 202 and is used for converting the voltage of the external direct current and providing it to the controller 202 .

[0087] The voltage conversion module 203 is also connected to the heating layer 6 , and is also used to convert the voltage of the external direct current and provide it to the heating layer 6 .

[0088] The input end of the voltage conversion module 203 is connected to the external DC power supply Vcc. The output end of the voltage conversion module 203 is connected to the controller 202 and the heating layer 6. The voltage conversion module 203 provides the converted voltage to the controller 202 and the heating layer 6 through the output end.

[0089] Exemplarily, the voltage conversion module 203 may be a power management chip.

[0090] In this embodiment, a voltage conversion module is provided in the detection device so that the detection device can be flexibly matched with an external power supply.

[0091] In yet another embodiment, Figure 4 As shown, the detection device 200 also includes a temperature acquisition module 204 .

[0092] The temperature acquisition module 204 is disposed inside the steering wheel 100 , and is connected to the voltage conversion module 203 and the controller 202 , respectively, for acquiring the temperature of the steering wheel 100 , and transmitting the acquired temperature to the controller 202 .

[0093] The voltage conversion module 203 is further used to convert the voltage of the external direct current and provide it to the temperature acquisition module 204 .

[0094] The temperature acquisition module 204 can be disposed at any position inside the steering wheel 100. For example, it can be disposed between the heating layer 6 and the steering wheel body 1 or between the heating layer 6 and the first shielding layer 4. The temperature acquisition module 204 is connected to the controller 202, and can acquire the temperature of the steering wheel 100 and transmit the acquired temperature to the controller 202.

[0095] The temperature acquisition module 204 is also connected to the voltage conversion module 203 , and the voltage conversion module 203 is used to supply power to the temperature acquisition module 204 .

[0096] Exemplarily, the temperature acquisition module 204 may be an infrared temperature measuring probe.

[0097] In this embodiment, the temperature acquisition module is disposed inside the steering wheel, so that the temperature of the steering wheel can be acquired in time.

[0098] In yet another embodiment, the detection module 201 includes a capacitive sensor.

[0099] In this embodiment, the capacitive sensor is set as the detection module, which has a simple structure and good reliability.

[0100] In yet another embodiment, the temperature acquisition module 204 includes a thermistor.

[0101] The resistance of a thermistor changes with temperature. The thermistor has high sensitivity to temperature, long life, small size, simple structure, and can be made into various shapes and structures.

[0102] In this embodiment, the thermistor is set as the temperature acquisition module, which has a simple structure and good reliability.

[0103] Figure 5 FIG. 1 is a schematic diagram of a detection device for a steering wheel according to another exemplary embodiment. Figure 5 As shown, the voltage conversion module 203 is also connected to the second shielding layer 5 and the first shielding layer 4 .

[0104] The voltage conversion module 203 is used for converting the voltage of the external direct current and providing it to the second shielding layer 5 and the first shielding layer 4 . Figure 5 The second shielding layer 5 and the first shielding layer 4 are electronic shielding layers, which may be metal cloth or metal fabric, and have the function of shielding the second induction layer from the external electric field when powered on.

[0105] In addition to detecting whether the steering wheel is out of hands, the detection device can also detect the driver's hand grip posture.

[0106] In yet another embodiment, the detection modules 201 are respectively connected to a plurality of regions in the first sensing layer 2 , and are used to collect detection capacitance values ​​of the plurality of regions in the first sensing layer 2 .

[0107] The controller 202 is further configured to determine the grip posture of the driver's hand according to the detected capacitance values ​​of the plurality of regions in the first sensing layer 2 and the reference capacitance value of the second sensing layer 3 .

[0108] The first sensing layer 2 can be divided into a plurality of regions. Figure 6 FIG. 1 is a schematic diagram of a detection device for a steering wheel according to another exemplary embodiment. Figure 6 As shown, Figure 6 The first sensing layer 2 is divided into four regions 2a, 2b, 2c and 2d. The detection modules 201 are connected to the four regions 2a, 2b, 2c and 2d respectively.

[0109] The grip of the driver's hand may include, for example, light touch, half grip, full grip, two-hand grip, one-hand grip, etc. The detection capacitance value of each area in the first sensing layer 2 and the reference capacitance value of the second sensing layer 3 are collected by the detection module 201. After receiving the detection capacitance value of each area in the first sensing layer 2 and the reference capacitance value of the second sensing layer 3, the controller 202 can determine the grip of the driver's hand according to multiple detection capacitance values ​​and reference capacitance values. For example, the controller 202 can determine whether each area is touched by the driver's hand by judging whether the difference between each detection capacitance value and the reference capacitance value meets a predetermined condition (for example, whether it is greater than a predetermined difference threshold), so that the corresponding grip of the driver's hand can be found according to a predetermined mapping relationship. What the controller 202 performs is only a simple judgment based on the relevant technology.

[0110] In this embodiment, the first sensing layer is divided into a plurality of regions, and the detection module is connected to each of the plurality of regions in the first sensing layer. In this way, the controller can determine the grip posture of the driver's hand according to the detection capacitance value of each region in the first sensing layer and the reference capacitance value of the second sensing layer, and the circuit is simple and reliable.

[0111] The multiple regions in the first sensing layer 2 may be arranged horizontally or vertically.

[0112] Figure 6 ] It indicates that multiple regions of the first sensing layer 2 are arranged vertically. Figure 6 The number of the plurality of regions in the first sensing layer 2 is schematically shown as four (2a, 2b, 2c, 2d). Figure 7 FIG. 1 is a schematic diagram showing a steering wheel area division according to an exemplary embodiment. Figure 7 As shown in the partially cutaway schematic diagram of the steering wheel 100, the four regions 2a, 2b, 2c, and 2d in the first sensing layer 2 are arranged longitudinally, that is, arranged in a radial direction outward from the center of the steering wheel, and each region in the first sensing layer 2 forms a complete circular ring (curved surface) with the center of the steering wheel as the center.

[0113] The controller 202 determines the grip posture of the driver's hand (including light touch, half grip, full grip) according to the detection capacitance values ​​of the four areas 2a, 2b, 2c, and 2d collected by the detection module 201 and the reference capacitance value of the second sensing layer 3.

[0114] The multiple regions in the first sensing layer 2 may also be arranged laterally. Figure 8 is a schematic diagram showing a detection device for a steering wheel according to yet another exemplary embodiment. Figure 8 The multiple regions of the first sensing layer 2 are arranged horizontally, and the number of the multiple regions in the first sensing layer 2 is schematically four (four regions 2e, 2f, 2g, and 2h). Fig. 9FIG. 4 is a schematic diagram showing a steering wheel area division according to another exemplary embodiment. Fig. 9 The front view of the steering wheel 100 from the driver's perspective. The multiple regions in the first sensing layer 2 are arranged horizontally, that is, from the driver's perspective, the entire circular ring of the steering wheel is divided into multiple "arc"-shaped regions, each of which is a tubular surface with a curved central axis.

[0115] The controller 202 can determine the driver's hand grip (including holding the steering wheel with one hand, holding the steering wheel with both hands, etc.) based on the detection capacitance values ​​of the four areas 2e, 2f, 2g, and 2h collected by the detection module 201 and the reference capacitance value of the second sensing layer 3.

[0116] In this embodiment, when the multiple areas of the first sensing layer are arranged vertically, the controller can determine gripping postures such as light touch, half grip, full grip, etc. When the multiple areas of the first sensing layer are arranged horizontally, the controller can determine gripping postures such as single-hand gripping and double-hand gripping, enriching and refining the gripping posture detection results.

[0117] In another embodiment, the detection module 201 is respectively connected to multiple regions in the second sensing layer 3 to collect reference capacitance values ​​of the multiple regions in the second sensing layer 3;

[0118] The controller 202 is further configured to determine the grip posture of the driver's hand according to the detection capacitance values ​​of the multiple regions in the first sensing layer 2 and the reference capacitance values ​​of the multiple regions in the second sensing layer 3 .

[0119] The second sensing layer 3 can be divided into multiple regions. Fig.10 FIG. 1 is a schematic diagram of a detection device for a steering wheel according to another exemplary embodiment. Fig.10 As shown, Fig.10 The second sensing layer 3 is divided into four regions 3a, 3b, 3c and 3d. The detection modules 201 are connected to the four regions 3a, 3b, 3c and 3d respectively.

[0120] The number of the multiple regions in the first sensing layer 2 and the second sensing layer 3 may be equal or unequal. When they are equal, the multiple regions in the first sensing layer 2 and the multiple regions in the second sensing layer 3 may be arranged in a one-to-one correspondence.

[0121] The controller 202 determines the grip of the driver's hand according to the detection capacitance values ​​of multiple areas in the first sensing layer 2 and the reference capacitance values ​​of multiple areas in the second sensing layer 3 collected by the detection module 201. For example, the controller 202 can determine whether each area is touched by the driver's hand by judging whether the difference between the detection capacitance value of each area in the first sensing layer and the reference capacitance value corresponding to each area meets a predetermined condition (for example, whether it is greater than a predetermined difference threshold), so as to find the corresponding grip of the driver's hand according to a predetermined mapping relationship. The controller 202 performs only a simple judgment based on the relevant technology.

[0122] In this embodiment, the second sensing layer is divided into multiple areas, and the detection modules are respectively connected to the multiple areas of the second sensing layer. In this way, the controller can determine the grip posture of the driver's hand according to the detection capacitance values ​​of the multiple areas in the first sensing layer and the reference capacitance values ​​of the multiple areas in the second sensing layer collected by the detection module, with good accuracy.

[0123] In another embodiment, the multiple regions in the second sensing layer 3 are arranged horizontally or vertically.

[0124] The multiple regions in the second sensing layer 3 can be arranged vertically. Fig.10 , Fig.10 The multiple regions (3a, 3b, 3c, 3d) in the second sensing layer 3 are shown as being arranged vertically. For example, those skilled in the art will appreciate that if the number of the multiple regions in the first sensing layer and the second sensing layer is equal, Figure 7 In the embodiment of the longitudinal arrangement, any area in the first sensing layer and the corresponding area in the second sensing layer are Figure 7 The cross section of the middle steering wheel has a central angle with the same position and size.

[0125] The multiple regions in the second sensing layer 3 may also be arranged laterally. Fig.11 FIG. 1 is a schematic diagram of a detection device for a steering wheel according to another exemplary embodiment. Fig.11 As shown, Fig.11 The multiple regions (3e, 3f, 3g, 3h) in the second sensing layer 3 are shown as being arranged horizontally. For example, those skilled in the art will appreciate that if the number of the multiple regions in the first sensing layer and the second sensing layer is equal, Fig. 9 In the embodiment of the horizontal arrangement, any area in the first sensing layer and the corresponding area in the second sensing layer are Fig. 9 The center angles of the steering wheel in the front view have the same position and size.

[0126] The present disclosure further provides a vehicle, comprising the above-mentioned steering wheel 100 or the above-mentioned detection device 200 for a steering wheel.

[0127] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings; however, the present disclosure is not limited to the specific details in the above embodiments. Within the technical concept of the present disclosure, a variety of simple modifications can be made to the technical solution of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.

[0128] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.

[0129] In addition, various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.

Claims

1. A steering wheel, characterized in that: The steering wheel (100) comprises: Steering wheel body (1); A first sensing layer (2) is arranged on the radially outer side of the steering wheel body (1) and is used to sense changes in an external electric field and generate a detection capacitance value; A second sensing layer (3) is arranged between the steering wheel body (1) and the first sensing layer (2) and is used to generate a reference capacitance value; a first shielding layer (4), arranged between the steering wheel body (1) and the second sensing layer (3), and used for shielding the second sensing layer (3) from the effect of an external electric field; and The second shielding layer (5) is arranged between the first induction layer (2) and the second induction layer (3) and is used to shield the second induction layer (3) from the effect of an external electric field.

2. The steering wheel according to claim 1, characterized in that: The steering wheel (100) further comprises a heating layer (6) which is arranged between the steering wheel body (1) and the first shielding layer (4) and is used for heating the steering wheel (100).

3. The steering wheel according to claim 2, characterized in that: The steering wheel (100) further comprises an insulating layer (8), wherein the insulating layer (8) is arranged at at least one of the following locations: between the steering wheel body (1) and the heating layer (6), between the heating layer (6) and the first shielding layer (4), between the first shielding layer (4) and the second sensing layer (3), between the second sensing layer (3) and the second shielding layer (5), and between the second shielding layer (5) and the first sensing layer (2).

4. The steering wheel according to claim 3, characterized in that: The steering wheel (100) further comprises a skin layer (7), wherein the skin layer (7) is arranged at the radially outermost layer of the steering wheel (100), and the insulating layer (8) is arranged between the skin layer (7) and the first sensing layer (2).

5. A detection device for a steering wheel, used for detecting the steering wheel (100) according to any one of claims 1 to 4, characterized in that: The detection device (200) comprises: A detection module (201), connected to the first sensing layer (2) and the second sensing layer (3), for collecting a detection capacitance value of the first sensing layer (2) and a reference capacitance value of the second sensing layer (3), and transmitting the collection to a controller (202); The controller (202) is connected to the detection module (201) and is used to determine whether the steering wheel (100) is out of the hands based on the received detection capacitance value and reference capacitance value.

6. The detection device according to claim 5, characterized in that: The detection modules (201) are respectively connected to a plurality of regions in the first sensing layer (2) and are used to collect detection capacitance values ​​of the plurality of regions in the first sensing layer (2); The controller (202) is also used to determine the grip posture of the driver's hand based on the detection capacitance values ​​of multiple areas in the first sensing layer (2) and the reference capacitance value of the second sensing layer (3).

7. The detection device according to claim 6, characterized in that: The multiple regions in the first sensing layer (2) are arranged horizontally or vertically.

8. The detection device according to claim 6 or 7, characterized in that: The detection modules (201) are respectively connected to a plurality of regions in the second sensing layer (3) and are used to collect reference capacitance values ​​of the plurality of regions in the second sensing layer (3); The controller (202) is also used to determine the grip posture of the driver's hand based on the detection capacitance values ​​of multiple areas in the first sensing layer (2) and the reference capacitance values ​​of multiple areas in the second sensing layer (3).

9. The detection device according to claim 8, characterized in that: The multiple regions in the second sensing layer (3) are arranged horizontally or vertically.

10. The detection device according to claim 5, characterized in that: The steering wheel (100) further comprises a heating layer (6) disposed between the steering wheel body (1) and the first shielding layer (4) and used for heating the steering wheel (100). The detection device (200) further comprises: A voltage conversion module (203), connected to the controller (202), and configured to convert the voltage of the external direct current and provide it to the controller (202); The voltage conversion module (203) is also connected to the heating layer (6), and is also used to convert the voltage of the external direct current and provide it to the heating layer (6).

11. The detection device according to claim 10, characterized in that: The detection device (200) further comprises: a temperature acquisition module (204), arranged inside the steering wheel (100), connected to the voltage conversion module (203) and the controller (202) respectively, and used for acquiring the temperature of the steering wheel (100) and transmitting the acquired temperature to the controller (202); The voltage conversion module (203) is also used to convert the voltage of the external direct current and provide it to the temperature acquisition module (204).

12. The detection device according to claim 5, characterized in that: The detection module (201) comprises a capacitive sensor.

13. The detection device according to claim 11, characterized in that: The temperature acquisition module (204) comprises a thermistor.

14. A vehicle, characterized in that: The invention comprises the steering wheel (100) according to any one of claims 1 to 4 or the detection device (200) according to any one of claims 5 to 13.

Images