Hand-leaving detection device for steering wheel

Abstract

The utility model discloses a hand-leaving detection device for a steering wheel, and the device comprises a laser sensing module which is disposed in a cover cap of the steering wheel, and the laser sensing module generates a plurality of light beams which are disposed at intervals in the circumferential direction and irradiate the inner side surface of a rim of the steering wheel; on one hand, the control processor is connected with the laser sensing module and used for collecting sensing signals of the laser sensing module and processing the collected sensing signals to generate hand-leaving detection signals, and on the other hand, the control processor is connected with an automobile control system and used for sending the generated hand-leaving detection signals to the automobile control system. Whether a driver holds the steering wheel or not can be accurately detected through an optical means, and the detection precision is improved. Compared with a traditional sensor, the sensor provided by the utility model is lower in cost and easy to popularize. The system can be easily integrated with an existing automobile control system and is convenient to implement.

Description

Technical Field

[0001] This utility model relates to the field of automotive safety technology, and in particular to a steering wheel hands-off detection device. Background Technology

[0002] With the development of autonomous driving technology, vehicle safety performance has become a key research focus. In semi-autonomous driving mode, the driver still needs to maintain control of the vehicle, making it particularly important to detect whether the driver is holding the steering wheel. Traditional methods for detecting whether the driver is off-hand include pressure sensors and capacitive touch sensors, but these methods suffer from problems such as high false detection rates and high costs.

[0003] Therefore, through beneficial exploration and research, the applicant has found a solution to the above problems, and the technical solution to be introduced below is the result of this research. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a steering wheel hands-off detection device that has high detection accuracy, low manufacturing cost and is easy to integrate, in order to overcome the shortcomings of the existing technology.

[0005] The technical problem to be solved by this utility model can be achieved by the following technical solution:

[0006] A steering wheel hands-off detection device, comprising:

[0007] A laser sensing module housed within the steering wheel cover generates several circumferentially spaced laser beams that illuminate the inner surface of the steering wheel rim; and

[0008] The control processor is connected to the laser sensing module on one hand to collect the sensing signals from the laser sensing module and process the collected sensing signals to generate a hands-off detection signal. On the other hand, it is connected to the vehicle control system to send the generated hands-off detection signal to the vehicle control system.

[0009] In a preferred embodiment of the present invention, the laser sensing module includes at least one layer of laser emitting module. Each layer of laser emitting module is composed of a plurality of laser diodes arranged circumferentially at intervals on the outer periphery of the top surface of the steering wheel cover. Each laser diode is connected to the control processor and its laser emission direction is toward the inner side of the steering wheel rim.

[0010] In a preferred embodiment of this utility model, the control processor is an MCU unit of model GD32F450.

[0011] In a preferred embodiment of this invention, the control processor is connected to the vehicle control system via a CAN bus or a LIN bus.

[0012] Due to the adoption of the above technical solution, the beneficial effects of this utility model are as follows: This utility model can accurately detect whether the driver is holding the steering wheel through optical means, thus improving detection accuracy. Compared with traditional sensors, this utility model has lower cost and is easier to promote. This utility model is easy to integrate with existing automotive control systems, facilitating implementation. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the structure of this utility model.

[0015] Figure 2 This is an installation diagram of the laser sensing module of this utility model. Detailed Implementation

[0016] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below with reference to specific illustrations.

[0017] See Figure 1 and combined Figure 2 The figure shows a steering wheel off-hand detection device, including a laser sensing module 100 and a control processor 200.

[0018] A laser sensing module 100 is disposed inside the cover 11 of the steering wheel 10. The laser sensing module 100 generates several circumferentially spaced laser beams that irradiate the inner surface of the rim 12 of the steering wheel 10. In this embodiment, the laser sensing module 100 includes a laser emitting module. Each laser emitting module consists of several laser diodes 110 arranged circumferentially at intervals on the outer periphery of the top surface of the cover 11 of the steering wheel 10. The spacing of the laser diodes 110 must meet the requirement of the minimum finger spacing. Each laser diode 110 is connected to the control processor 200, and its laser emission direction is towards the inner surface of the rim 12 of the steering wheel 10. Of course, the number of laser emitting modules is not limited to that in this embodiment. It should be designed according to actual needs. In order to achieve higher detection accuracy, the laser emitting module can be configured as multiple layers arranged longitudinally, with the laser diodes in adjacent laser emitting modules staggered to cover a wider range.

[0019] The control processor 200 is connected to the laser sensing module 100 on one hand to acquire the sensing signals from the laser sensing module 100 and process the acquired sensing signals to generate a hands-off detection signal. On the other hand, it is connected to the vehicle control system 20 via a CAN bus or LIN bus to send the generated hands-off detection signal to the vehicle control system 20 for processing. In this embodiment, the control processor 200 preferably uses a GD32F450 MCU unit.

[0020] The working principle of this steering wheel hands-off detection device is as follows:

[0021] The laser diode 110 in the laser sensing module 100 emits a light beam and illuminates the inner side of the wheel rim 12 of the steering wheel 10. The control processor 200 determines whether the light beam emitted by the laser diode 110 in the laser sensing module 100 is blocked. If the light beam emitted by one or more laser diodes 110 is blocked, it indicates that the driver is holding the steering wheel. If the light beam emitted by each laser diode 110 is not blocked, it indicates that the driver is not holding the steering wheel. At this time, a hands-off detection signal is generated and sent to the vehicle control system 20.

[0022] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A steering wheel hands-off detection device, characterized in that, include: A laser sensing module is installed inside the cover of the steering wheel, and the laser sensing module generates several circumferentially spaced light beams that irradiate the inner surface of the steering wheel rim. as well as The control processor is connected to the laser sensing module on one hand to collect the sensing signals from the laser sensing module and process the collected sensing signals to generate a hands-off detection signal. On the other hand, it is connected to the vehicle control system to send the generated hands-off detection signal to the vehicle control system.

2. The steering wheel hands-off detection device as described in claim 1, characterized in that, The laser sensing module includes at least one layer of laser emitting module. Each layer of laser emitting module consists of several laser diodes arranged circumferentially at intervals on the outer periphery of the top surface of the steering wheel cover. Each laser diode is connected to the control processor and its laser emission direction is towards the inner side of the steering wheel rim.

3. The steering wheel hands-off detection device as described in claim 1, characterized in that, The control processor uses a GD32F450 MCU unit.

4. The steering wheel hands-off detection device as described in claim 3, characterized in that, The control processor is connected to the vehicle control system via a CAN bus or a LIN bus.

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