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Steering wheel sensor with human body detection function and steering wheel

A technology of human body detection and steering wheel, which is applied to the direction of steering control, instruments, and measuring devices installed on the car, and can solve problems affecting the driver's hand grip, charge attenuation, and affecting the instantaneous stability of the potential of the sensing layer, etc. , to achieve the effect of guaranteeing the grip of the hand, improving the instantaneous stability and reducing the damage

Pending Publication Date: 2021-06-01
安闻汽车技术(天津)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] When the separation thickness between the two electrode plates (sensing layer and shielding layer) is small (that is, when the thickness of the spacer substrate is less than 2.0mm), each signal excitation will cause rapid charge decay in a short period of time ; As a result, it will affect the instantaneous stability of the potential of the sensing layer
[0004] At present, the improvement method adopted is to increase the thickness of the spacer substrate to avoid excessive charge absorption of the sensing layer by the shielding layer; however, since the steering wheel is a relatively delicate and complex mechanism, it is difficult to adjust the thickness of the sensor and the diameter of the hub. Excessive increase, otherwise, will affect the driver's hand grip; therefore, the existing steering wheel sensor needs to be improved urgently

Method used

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  • Steering wheel sensor with human body detection function and steering wheel
  • Steering wheel sensor with human body detection function and steering wheel
  • Steering wheel sensor with human body detection function and steering wheel

Examples

Experimental program
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Effect test

Embodiment 1

[0026] Please refer to figure 1 and figure 2 The shown structure diagram of a steering wheel sensor with human body detection function provided by the present application includes: a sensing layer 3, a shielding layer 4 and a spacer arranged between the sensing layer 3 and the shielding layer 4 Material 5;

[0027] The sensing layer 3 is a stretchable conductive textile, the shielding layer 4 is a stretchable conductor wire arrangement layer, and the sensing layer 3 is denser than the shielding layer 4; The duty cycle of the sensing layer 3 is greater than the duty cycle of the shielding layer 4 ; the sensing layer 3 and the shielding layer 4 are fixed to the spacer substrate 5 by sewing or sticking the adhesive layer 7 .

[0028] In this embodiment, the sensing layer 3 is used to identify the touch and grip of the driver's hand; here, the duty cycle of the sensing layer 3 and the spacer substrate 5 is greater than or equal to 50%; The material of layer 3 is a dense conduc...

Embodiment 2

[0041] A steering wheel, comprising: a rim frame 1 and a skin 2 sleeved on the rim frame 1; spokes are installed on the rim frame 1, and an ECU is installed in the steering wheel cavity of the spokes; the rim The above-mentioned steering wheel sensor with human body detection function is arranged between the skeleton 1 and the skin 2; the skin 2 is arranged adjacent to the sensing layer 3, and the rim skeleton 1 and the shielding Layer 4 is arranged adjacently.

[0042] In this example, if Figure 6As shown, the above-mentioned steering wheel sensor with human detection function is installed between the rim frame 1 and the skin 2, and the skin 2 is adjacent to the sensing layer 3, and the rim frame 1 and the shielding Layer 4 is adjacently arranged to improve the instantaneous potential stability of the sensing layer and ensure the hand grip effect of the driver;

[0043] Specifically, when the sensing electrode of the ECU excites the sensing layer with electrical signals, c...

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Abstract

The invention discloses a steering wheel sensor with a human body detection function and a steering wheel. The steering wheel sensor comprises a sensing layer, a shielding layer and a spacing base material arranged between the sensing layer and the shielding layer. The sensing layer and the shielding layer are designed, the spacing base material is arranged between the sensing layer and the shielding layer, and the sensing layer and the shielding layer are oppositely and parallelly unfolded to form an existing plate capacitor structure. The sensing layer is used for recognizing touch and holding of the hands of a driver, the spacing base material forms a dielectric interval, and the shielding layer isolates electric signal interference of conductor devices such as a metal structure in a steering wheel rim framework and a heater layer below the shielding layer on the basis of the Faraday shielding effect principle. Therefore, the instantaneous stability of the potential is improved, and the hand holding effect of a driver is guaranteed.

Description

technical field [0001] The present disclosure generally relates to the technical field of vehicle steering wheel equipment, and specifically relates to a steering wheel sensor and a steering wheel with a human body detection function. Background technique [0002] During the working process of the existing vehicle steering wheel sensing system, when the system is in the initial state (when the steering wheel is not yet grasped), the excitation signal sent by the sensing electrode of the ECU to the sensing layer will be due to the dielectric properties of the spacer substrate. Because of the parameters, it is gradually absorbed by the shielding layer, and then the potential detected at the sensing electrode will gradually decrease. [0003] When the separation thickness between the two electrode plates (sensing layer and shielding layer) is small (that is, when the thickness of the spacer substrate is less than 2.0mm), each signal excitation will cause rapid charge decay in a...

Claims

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Application Information

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IPC IPC(8): G01V3/08B62D1/04
CPCG01V3/08B62D1/04
Inventor 张海涛霍学鹏李春梅
Owner 安闻汽车技术(天津)有限公司