Vehicle steering wheel out-of-hand detection method and device, medium and program product

Abstract

The embodiment of the invention discloses a vehicle steering wheel out-of-hand detection method and device, a medium and a program product. Specifically, an electrode array is embedded in a vehicle steering wheel, the first end of the electrode array is connected with a signal generator, the second end of the electrode array is connected with a signal collector, and the method comprises the steps that current pulses are injected into the vehicle steering wheel through the signal generator; acquiring bioelectricity response of a driver when current pulse is injected into a steering wheel of the vehicle through a signal acquisition device; according to the bioelectricity response, driver hand release detection is conducted on the vehicle steering wheel, and a hand release detection result is determined. Through active current pulse excitation, bioelectricity response of the driver is detected to detect hand release of the driver, the conditions that the driver actively holds the steering wheel and passively contacts the steering wheel can be distinguished, and the accuracy of hand release detection of the vehicle steering wheel is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of intelligent driving, and in particular to a vehicle steering wheel hands-off detection method, device, medium and program product. BACKGROUND

[0002] In the intelligent driving of a vehicle, such as automatic driving or assisted driving of a vehicle, Hands-off Detection (HOD) is usually required to determine the timing of taking over the vehicle by a driver or intelligent driving.

[0003] The vehicle steering wheel hands-off detection method in the prior art usually judges whether a driver holds a steering wheel by measuring steering wheel torque fluctuation. However, when the vehicle is driving at low speed or in a straight line, the steering wheel torque changes weakly, which easily leads to missed detection. In a complex driving scene, such as a bumpy road, it is easy to be misdetected. Moreover, when a driver slightly holds the steering wheel, it may be misjudged as the driver effectively controlling the steering wheel. When the hand position is recognized by machine vision for vehicle hands-off detection, it is easily affected by light, shielding and the like, resulting in low accuracy of vehicle steering wheel hands-off detection. SUMMARY

[0004] The present application provides a vehicle steering wheel hands-off detection method, device, medium and program product to improve the accuracy of vehicle steering wheel hands-off detection.

[0005] According to an aspect of the present application, a vehicle steering wheel hands-off detection method is provided, an electrode array is embedded on a vehicle steering wheel, a first end of the electrode array is connected to a signal generator, and a second end of the electrode array is connected to a signal collector, and the method comprises:

[0006] injecting a current pulse into the vehicle steering wheel by the signal generator;

[0007] acquiring a bioelectric response of a driver when the current pulse is injected into the vehicle steering wheel by the signal collector;

[0008] performing driver hands-off detection on the vehicle steering wheel according to the bioelectric response to determine a hands-off detection result.

[0009] Optionally, injecting a current pulse into the vehicle steering wheel by the signal generator comprises:

[0010] injecting a current pulse meeting human safety requirements and comprising a first preset frequency and a second preset frequency into the vehicle steering wheel by the signal generator;

[0011] wherein the first preset frequency is less than the second preset frequency.

[0012] Optionally, the first preset frequency is a value in the interval (0, 50] Hz; and the second preset frequency is a value in the interval [50, 200] Hz.

[0013] Optionally, the bioelectric response of the driver is acquired by the signal collector when the current pulse is injected into the steering wheel of the vehicle.

[0014] The phase difference between the voltage and the current in the bioelectric response of the driver is acquired by the signal collector when the current pulse is injected into the steering wheel of the vehicle, and / or the impedance value.

[0015] Optionally, the driver hand-off detection is performed on the steering wheel of the vehicle according to the bioelectric response, and a hand-off detection result is determined, including:

[0016] When the phase difference is negative, and / or when the impedance value meets the preset human skin impedance characteristics, the hand-off detection result is determined as non-hand-off driving.

[0017] Otherwise, the hand-off detection result is determined as hand-off driving.

[0018] Optionally, before determining the hand-off detection result as non-hand-off driving when the phase difference is negative, and / or when the impedance value meets the preset human skin impedance characteristics, the method further includes:

[0019] A first impedance value corresponding to the first preset frequency and a second impedance value corresponding to the second preset frequency are acquired.

[0020] When the first impedance value is greater than the second impedance value, it is determined that the impedance value meets the preset human skin impedance characteristics.

[0021] Optionally, after the driver hand-off detection is performed on the steering wheel of the vehicle according to the bioelectric response, and the hand-off detection result is determined, the method further includes:

[0022] When the hand-off detection result is non-hand-off driving, the vehicle auxiliary driving system or the vehicle automatic driving system is exited.

[0023] According to another aspect of the present application, a vehicle steering wheel hand-off detection device is provided, in which an electrode array is embedded on a vehicle steering wheel, a first end of the electrode array is connected to a signal generator, and a second end of the electrode array is connected to a signal collector, and the device includes:

[0024] A current pulse injection module for injecting a current pulse into the steering wheel of the vehicle by the signal generator;

[0025] A bioelectric response acquisition module for acquiring the bioelectric response of the driver by the signal collector when the current pulse is injected into the steering wheel of the vehicle.

[0026] a hand-off detection module configured to perform driver hand-off detection on the vehicle steering wheel according to the bioelectric response, and determine a hand-off detection result.

[0027] According to another aspect of the present application, there is provided an electronic device comprising:

[0028] at least one processor; and

[0029] a memory communicatively connected to the at least one processor; wherein

[0030] the memory stores a computer program executable by the at least one processor, and the computer program is executed by the at least one processor to enable the at least one processor to perform the vehicle steering wheel hand-off detection method according to any one of the embodiments of the present application.

[0031] According to another aspect of the present application, there is provided a computer readable storage medium storing computer instructions for enabling a processor to perform the vehicle steering wheel hand-off detection method according to any one of the embodiments of the present application when executed by the processor.

[0032] According to another aspect of the present application, there is provided a computer program product comprising a computer program for enabling a processor to perform the vehicle steering wheel hand-off detection method according to any one of the embodiments of the present application when executed by the processor.

[0033] The technical solution of the embodiments of the present application embeds an electrode array on a vehicle steering wheel, connects a first end of the electrode array to a signal generator, connects a second end of the electrode array to a signal collector, injects a current pulse into the vehicle steering wheel through the signal generator, acquires a bioelectric response of a driver when the current pulse is injected into the vehicle steering wheel through the signal collector, performs driver hand-off detection on the vehicle steering wheel according to the bioelectric response, and determines a hand-off detection result, thereby solving the problem of inaccurate vehicle steering wheel hand-off detection, improving hand-off detection accuracy, and distinguishing between active holding of the steering wheel by the driver and passive contact with the steering wheel by the driver.

[0034] It should be understood that the content described in this section is not intended to identify key or important features of the embodiments of the present application, nor is it used to limit the scope of the present application. Other features of the present application will become apparent from the following description. BRIEF DESCRIPTION OF DRAWINGS

[0035] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0036] Figure 1 This is a flowchart of a vehicle steering wheel hands-off detection method according to Embodiment 1 of the present invention;

[0037] Figure 2 This is a flowchart of a vehicle steering wheel hands-off detection method according to Embodiment 2 of the present invention;

[0038] Figure 3 This is a flowchart of another method for detecting when a vehicle's steering wheel is removed from hands, provided in Embodiment 2 of the present invention;

[0039] Figure 4 This is a schematic diagram of a vehicle steering wheel hands-off detection device according to Embodiment 3 of the present invention;

[0040] Figure 5 This is a schematic diagram of the structure of an electronic device that implements the vehicle steering wheel hands-off detection method according to an embodiment of the present invention. Detailed Implementation

[0041] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0042] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0043] Example 1

[0044] Figure 1 This is a flowchart of a vehicle steering wheel hands-off detection method according to Embodiment 1 of the present invention. This embodiment can be applied to situations where steering wheel hands-off detection is performed in intelligent driving, and then the vehicle is accurately taken over based on the hands-off detection result. This method can be executed by a vehicle steering wheel hands-off detection device, which can be implemented in hardware and / or software. The vehicle steering wheel hands-off detection device can be configured in electronic devices such as computers or vehicle controllers.

[0045] An electrode array is embedded in the vehicle steering wheel. The first end of the electrode array is connected to a signal generator, and the second end is connected to a signal acquisition unit. The electrode array can be highly sensitive. It is used to detect the driver's hand contact with the steering wheel via current pulses. The electrode array can be embedded in the surface of the steering wheel. The signal generator injects current pulses into the steering wheel. The signal acquisition unit collects the driver's bioelectrical response. The signal acquisition unit can be one or more devices, such as a current sensor, a voltage sensor, and a phase meter.

[0046] like Figure 1 As shown, the method for detecting steering wheel slippage in this vehicle includes:

[0047] Step 110: Inject current pulses into the vehicle steering wheel using a signal generator.

[0048] A signal generator can periodically inject electrical pulses into the vehicle's steering wheel. To ensure driver safety during hands-off detection, the requirements for human safety regarding the electrical pulses can be considered when periodically injecting them into the steering wheel via the signal generator, such as limiting the current and / or voltage of the pulses. Furthermore, the electrical pulses can also be signals at a specific frequency.

[0049] Optionally, injecting current pulses into the vehicle steering wheel via a signal generator includes: injecting current pulses into the vehicle steering wheel via a signal generator that meet human safety requirements and include a first preset frequency and a second preset frequency; wherein the first preset frequency is less than the second preset frequency.

[0050] The current pulse injected into the vehicle's steering wheel by the signal generator must meet human safety requirements; for example, the current pulse can be a safe current. For instance, the current pulse can be a safe current of less than 10 volts or less than 5 volts.

[0051] When injecting current pulses into the vehicle steering wheel via a signal generator, multiple preset frequency current pulses can be injected into the steering wheel. The driver's bioelectrical response differs significantly at these selected preset frequencies, allowing for accurate hand-off detection of the steering wheel.

[0052] For example, when current pulses of a first preset frequency and a second preset frequency are injected into the vehicle steering wheel via a signal generator, the corresponding bioelectrical response of the driver has a preset difference value. This preset difference value is quite obvious and can intuitively reflect the impedance characteristics of human skin under microcurrent pulses, facilitating accurate and intuitive detection of the vehicle steering wheel being removed from the driver's hands.

[0053] Step 120: Acquire the driver's bioelectric response when an electrical pulse is injected into the vehicle's steering wheel using a signal acquisition device.

[0054] In this invention, the driver's bioelectric response is acquired only after user authorization, and the acquisition method is legal and legitimate. For example, a voltage sensor can be used to acquire the voltage when the driver's hand touches the steering wheel when a current pulse is injected. A current sensor can be used to acquire the current when the driver's hand touches the steering wheel when a current pulse is injected. A phase meter can be used to acquire the phase difference between the voltage and current when the driver's hand touches the steering wheel when a current pulse is injected. Parameters in the bioelectric response can be calculated or directly obtained through one or more combinations of voltage, current, and phase difference. For example, the impedance value when the driver's hand touches the steering wheel can be calculated based on the voltage and current. The impedance value and / or phase difference can be used as the driver's bioelectric response. The voltage can be acquired through a voltage sensor or directly from a signal generator.

[0055] Optionally, the driver's bioelectric response when a current pulse is injected into the vehicle steering wheel is acquired by a signal acquisition device, including: acquiring the phase difference between voltage and current in the driver's bioelectric response when a current pulse is injected into the vehicle steering wheel, and / or the impedance value.

[0056] The ratio of the effective voltage to the effective current when the driver's hands touch the steering wheel can be used as the impedance value. The phase difference can be directly measured using the phase meter in the signal acquisition unit.

[0057] Step 130: Based on the bioelectric response, perform a driver hands-off test on the vehicle steering wheel and determine the hands-off test result.

[0058] When the bioelectrical response corresponds to the impedance characteristics of human skin, the hands-free detection result can be determined as driving with hands still attached; otherwise, the hands-free detection result is determined as driving with hands off. Specifically, the phase difference and / or impedance value can be used to determine whether they match the impedance characteristics of human skin when the driver's hands are in contact with the steering wheel. When the phase difference and / or impedance value match the impedance characteristics of human skin, the hands-free detection result can be determined as driving with hands still attached; otherwise, the hands-free detection result is determined as driving with hands off.

[0059] For example, when the phase difference is negative and / or the impedance difference between the first preset frequency and the second preset frequency meets a preset difference value, the hands-free detection result is determined to be hands-free driving; otherwise, the hands-free detection result is determined to be hands-free driving.

[0060] Because the steering wheel hands-off detection is based on the driver's bioelectrical response, i.e., the impedance characteristics of human skin, it can distinguish between situations where the driver is actively holding the steering wheel and situations where the driver is passively touching the steering wheel. For example, using the driver's bioelectrical response for hands-off detection can avoid identifying situations where heavy objects are pressing on the steering wheel as not being removed from the steering wheel, and can also avoid misjudgments of hands-off detection in complex driving scenarios.

[0061] The technical solution of this embodiment embeds an electrode array in the vehicle steering wheel. The first end of the electrode array is connected to a signal generator, and the second end of the electrode array is connected to a signal acquisition unit. The signal generator injects current pulses into the vehicle steering wheel. The signal acquisition unit acquires the driver's bioelectric response when the current pulses are injected into the vehicle steering wheel. Based on the bioelectric response, the driver's hands-off detection is performed on the vehicle steering wheel to determine the hands-off detection result. This solves the problem of inaccurate hands-off detection of the vehicle steering wheel, improves the accuracy of hands-off detection, and distinguishes between situations where the driver actively holds the steering wheel and situations where the driver passively touches the steering wheel.

[0062] Example 2

[0063] Figure 2 This is a flowchart of a vehicle steering wheel hands-off detection method according to Embodiment 2 of the present invention. This embodiment is a further refinement of the above technical solution. The technical solution in this embodiment can be combined with various optional solutions in one or more of the above embodiments.

[0064] An electrode array is embedded in the vehicle steering wheel. The first end of the electrode array is connected to a signal generator, and the second end of the electrode array is connected to a signal acquisition unit.

[0065] like Figure 2 As shown, the method includes:

[0066] Step 210: Inject current pulses that meet human safety requirements and include a first preset frequency and a second preset frequency into the vehicle steering wheel via a signal generator.

[0067] The first preset frequency is less than the second preset frequency. To ensure a significant difference in impedance values ​​at different frequencies during hands-off detection, a first preset frequency and a second preset frequency with a certain difference can be selected. Optionally, the first preset frequency is within the range (0, 50] Hz; the second preset frequency is within the range [50, 200] Hz. Selecting the first and second preset frequencies within the above ranges allows for the measurement of significantly different impedance values ​​when the driver's hand contacts the steering wheel, thereby achieving accurate hands-off detection. For example, the first preset frequency can be 10 Hz, and the second preset frequency can be 100 Hz.

[0068] Step 220: Obtain the phase difference between voltage and current in the driver's bioelectric response when a current pulse is injected into the vehicle steering wheel, and / or the first impedance value corresponding to the first preset frequency and the second impedance value corresponding to the second preset frequency through the signal acquisition device.

[0069] The phase difference can be directly measured using a phase meter. The first and second impedance values ​​can be calculated. For example, at a first preset frequency, the first impedance value can be obtained by comparing the effective voltage value from the signal generator with the effective current value measured by the current sensor. At a second preset frequency, the second impedance value can be obtained by comparing the effective voltage value from the signal generator with the effective current value measured by the current sensor.

[0070] Step 230: When the first impedance value is greater than the second impedance value, determine that the impedance value meets the preset human skin impedance characteristics.

[0071] The impedance characteristics of human skin can be summarized as follows: when a driver's hand is in contact with the steering wheel, the impedance value decreases as the frequency increases. In other words, when a driver's hand is in contact with the steering wheel, the impedance value is inversely correlated with frequency.

[0072] For example, when the first preset frequency is 10 Hz and the second preset frequency is 100 Hz, if the first impedance value is greater than 100 kiloohms and the second impedance value is less than 100 kiloohms, then the impedance value is determined to meet the preset human skin impedance characteristics; otherwise, the impedance value is determined not to meet the preset human skin impedance characteristics.

[0073] Step 240: When the phase difference is negative, and / or when the impedance value meets the preset human skin impedance characteristics, determine the hands-free detection result as driving without taking hands off; otherwise, determine the hands-free detection result as driving without taking hands off.

[0074] In the hand-off detection process, one or both of the following can be used: phase difference and impedance value. When the driver's hand is in contact with the steering wheel, the living skin exhibits a current-leading-voltage effect due to capacitance, resulting in a negative phase difference between voltage and current. However, when the steering wheel is under passive load (such as a heavy object pressing on it), the phase angle is close to 0° (pure resistance). Therefore, by using the negative phase difference as a hand-off detection condition, the driver's active grip on the steering wheel and passive load can be distinguished.

[0075] When the impedance value meets the preset human skin impedance characteristics, that is, when the first impedance value is greater than the second impedance value, the driver's active grip on the steering wheel and passive load can be distinguished based on the change of human body impedance value at different frequencies.

[0076] By combining the phase difference and impedance value, the accuracy of hands-free detection can be improved. Specifically, when the phase difference is negative and the first impedance value is greater than the second impedance value, the hands-free detection result is determined to be driving without taking hands off the wheel; otherwise, the hands-free detection result is determined to be driving without taking hands off the wheel.

[0077] Step 250: If the hands-free detection result indicates that the driver is not taking their hands off the wheel, exit the vehicle's driver assistance system or vehicle automatic driving system.

[0078] By accurately identifying hands-free driving, the vehicle can be precisely controlled. When the vehicle is not being driven by the driver, control can be promptly transferred to the driver. When the vehicle is being driven by the driver, the vehicle's driver assistance system or automatic driving system can take over the vehicle in a timely manner to ensure driving safety.

[0079] The technical solution of this invention involves embedding an electrode array in a vehicle steering wheel. A first end of the electrode array is connected to a signal generator, and a second end is connected to a signal acquisition unit. The signal generator injects current pulses into the vehicle steering wheel that meet human safety requirements and include a first preset frequency and a second preset frequency. The signal acquisition unit acquires the phase difference between voltage and current in the driver's bioelectrical response when the current pulses are injected into the vehicle steering wheel, and / or a first impedance value corresponding to the first preset frequency and a second impedance value corresponding to the second preset frequency. When the first impedance value is greater than the second impedance value, [the following is confirmed / confirmed]. The system ensures that the impedance value meets the preset human skin impedance characteristics. When the phase difference is negative, and / or when the impedance value meets the preset human skin impedance characteristics, the hand-off detection result is determined to be driving without taking off the hands. Otherwise, the hand-off detection result is determined to be driving without taking off the hands. When the hand-off detection result is driving without taking off the hands, the system exits the vehicle's driver assistance system or automatic driving system. This solves the problem of inaccurate steering wheel hand-off detection, improves the accuracy of hand-off detection, and distinguishes between situations where the driver actively holds the steering wheel and situations where the driver passively contacts the steering wheel. When the vehicle is not being driven without taking off the hands, the system promptly hands over the vehicle to the driver to ensure driving safety.

[0080] Figure 3 This is a flowchart of another method for detecting when a vehicle's steering wheel is removed from hands, provided in Embodiment 2 of the present invention. Figure 3 As shown, electrode plates embedded in the vehicle steering wheel release periodic pulses of different frequencies through a signal generator; impedance values ​​at frequencies of 10 Hz and 100 Hz are acquired by a current sensor; it is determined whether the first impedance value at 10 Hz is above 100 kiloohms and whether the second impedance value at 100 Hz is below 100 kiloohms; if the impedance value meets the preset human skin impedance characteristics, the phase angle of voltage and current is acquired by a phase meter; it is further determined whether the phase angle is negative; if the impedance value meets the preset human skin impedance characteristics and the phase angle is negative, the hands-free detection result is determined to be hands-free driving; otherwise, the hands-free detection result is determined to be hands-free driving. The technical solution of this embodiment of the invention, by actively injecting low-intensity, high-frequency microcurrent pulses into the steering wheel and detecting the bioelectrical response of the driver's hands, can accurately distinguish between the driver's actual grip on the steering wheel and false contact with the steering wheel, improving the accuracy of hands-free detection, thereby accurately controlling the vehicle and ensuring driving safety.

[0081] Furthermore, the vehicle steering wheel hands-off detection method provided in this embodiment of the invention can be used in conjunction with existing steering wheel hands-off detection methods to further improve the accuracy of hands-off detection.

[0082] Example 3

[0083] Figure 4 This is a schematic diagram of a vehicle steering wheel hands-off detection device according to Embodiment 3 of the present invention. An electrode array is embedded in the vehicle steering wheel, with a first end of the electrode array connected to a signal generator and a second end of the electrode array connected to a signal acquisition unit.

[0084] like Figure 4 As shown, the device includes: a current pulse injection module 410, a bioelectric response acquisition module 420, and a hand-release detection module 430. Wherein:

[0085] The current pulse injection module 410 is used to inject current pulses into the vehicle steering wheel via a signal generator.

[0086] The bioelectric response acquisition module 420 is used to acquire the driver's bioelectric response when an electric current pulse is injected into the vehicle steering wheel via a signal acquisition device.

[0087] The hands-off detection module 430 is used to detect when the driver has taken their hands off the steering wheel based on the bioelectric response and to determine the hands-off detection result.

[0088] Optionally, the current pulse injection module 410 includes:

[0089] The current pulse injection unit is used to inject current pulses that meet human safety requirements into the vehicle steering wheel through a signal generator, and includes a first preset frequency and a second preset frequency.

[0090] The first preset frequency is less than the second preset frequency.

[0091] Optionally, the first preset frequency is a value within the range (0, 50] Hz; the second preset frequency is a value within the range [50, 200] Hz.

[0092] Optionally, the bioelectric response acquisition module 420 includes:

[0093] The bioelectric response acquisition unit is used to acquire, via a signal acquisition device, the phase difference between voltage and current in the driver's bioelectric response when a current pulse is injected into the vehicle steering wheel, and / or the impedance value.

[0094] Optionally, the release detection module 430 includes:

[0095] The hands-free detection unit is used to determine the hands-free detection result as driving without taking hands when the phase difference is negative and / or when the impedance value meets the preset human skin impedance characteristics; otherwise, it determines the hands-free detection result as driving without taking hands.

[0096] Optionally, the device may also include:

[0097] The impedance value acquisition unit is used to acquire a first impedance value corresponding to a first preset frequency and a second impedance value corresponding to a second preset frequency before determining that the hands-free detection result is driving without hands-free when the phase difference is negative and / or when the impedance value meets the preset human skin impedance characteristics.

[0098] The impedance detection unit is used to determine that the impedance value meets the preset human skin impedance characteristics when the first impedance value is greater than the second impedance value.

[0099] Optionally, the device may also include:

[0100] The system exit module is used to detect driver hands-off driving based on bioelectric response, and after determining the hands-off detection result, exit the vehicle's driver assistance system or automatic driving system if the hands-off detection result is that the driver has not taken their hands off the wheel.

[0101] The vehicle steering wheel hands-off detection device provided in this embodiment of the invention can execute the vehicle steering wheel hands-off detection method provided in any embodiment of the invention, and has the corresponding functional modules and beneficial effects of the method.

[0102] In the technical solutions of this invention, the collection, storage, use, processing, transmission, provision, and disclosure of user personal information (such as the driver's bioelectric response) comply with the provisions of relevant laws and regulations and do not violate public order and good morals.

[0103] The information collected is information and data authorized by the user or fully authorized by all parties. The collection, storage, use, processing, transmission, provision, disclosure and application of the relevant data all comply with the relevant laws, regulations and standards of the relevant countries and regions, necessary confidentiality measures have been taken, and they do not violate public order and good morals. Corresponding operation portals are provided for users to choose to authorize or refuse.

[0104] When the intelligent driving system decides whether to enter or exit for the driver, a corresponding operation entry is provided for the user to choose to agree to or reject the automated decision result; if the user chooses to reject, the user enters the user's autonomous decision-making process.

[0105] Example 4

[0106] Figure 5 A schematic diagram of an electronic device 10, which can be used to implement embodiments of the present invention, is shown. The electronic device is intended to represent various forms of digital computers, such as laptop computers, desktop computers, workstations, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. The electronic device can also represent various forms of mobile devices, such as personal digital processors, cellular phones, smartphones, wearable devices (e.g., helmets, glasses, watches, etc.), and other similar computing devices. The components shown herein, their connections and relationships, and their functions are merely illustrative and are not intended to limit the implementation of the invention described and / or claimed herein.

[0107] like Figure 5 As shown, the electronic device 10 includes at least one processor 11 and a memory, such as a read-only memory (ROM) 12 or a random access memory (RAM) 13, communicatively connected to the at least one processor 11. The memory stores computer programs executable by the at least one processor. The processor 11 can perform various appropriate actions and processes based on the computer program stored in the ROM 12 or loaded from storage unit 18 into the RAM 13. The RAM 13 can also store various programs and data required for the operation of the electronic device 10. The processor 11, ROM 12, and RAM 13 are interconnected via a bus 14. An input / output (I / O) interface 15 is also connected to the bus 14.

[0108] Multiple components in electronic device 10 are connected to I / O interface 15, including: input unit 16, such as keyboard, mouse, etc.; output unit 17, such as various types of displays, speakers, etc.; storage unit 18, such as disk, optical disk, etc.; and communication unit 19, such as network card, modem, wireless transceiver, etc. Communication unit 19 allows electronic device 10 to exchange information / data with other devices through computer networks such as the Internet and / or various telecommunications networks.

[0109] Processor 11 can be a variety of general-purpose and / or special-purpose processing components with processing and computing capabilities. Some examples of processor 11 include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various special-purpose artificial intelligence (AI) computing chips, various processors running machine learning model algorithms, digital signal processors (DSPs), and any suitable processor, controller, microcontroller, etc. Processor 11 performs the various methods and processes described above, such as the vehicle steering wheel hands-off detection method.

[0110] In some embodiments, the vehicle steering wheel hands-off detection method may be implemented as a computer program tangibly contained in a computer-readable storage medium, such as storage unit 18. In some embodiments, part or all of the computer program may be loaded and / or installed on electronic device 10 via ROM 12 and / or communication unit 19. When the computer program is loaded into RAM 13 and executed by processor 11, one or more steps of the vehicle steering wheel hands-off detection method described above may be performed. Alternatively, in other embodiments, processor 11 may be configured to perform the vehicle steering wheel hands-off detection method by any other suitable means (e.g., by means of firmware).

[0111] Various embodiments of the systems and techniques described above herein can be implemented in digital electronic circuit systems, integrated circuit systems, field-programmable gate arrays (FPGAs), application-specific integrated circuits (ASICs), application-specific standard products (ASSPs), systems-on-a-chip (SoCs), payload-programmable logic devices (CPLDs), computer hardware, firmware, software, and / or combinations thereof. These various embodiments may include implementations in one or more computer programs that can be executed and / or interpreted on a programmable system including at least one programmable processor, which may be a dedicated or general-purpose programmable processor, capable of receiving data and instructions from a storage system, at least one input device, and at least one output device, and transmitting data and instructions to the storage system, the at least one input device, and the at least one output device.

[0112] Computer programs used to implement the methods of the present invention may be written in any combination of one or more programming languages. These computer programs may be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing device, such that when executed by the processor, the computer programs cause the functions / operations specified in the flowcharts and / or block diagrams to be performed. The computer programs may be executed entirely on a machine, partially on a machine, or as a standalone software package, partially on a machine and partially on a remote machine, or entirely on a remote machine or server.

[0113] In the context of this invention, a computer-readable storage medium can be a tangible medium that may contain or store a computer program for use by or in conjunction with an instruction execution system, apparatus, or device. A computer-readable storage medium may include, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, apparatus, or devices, or any suitable combination thereof. Alternatively, a computer-readable storage medium may be a machine-readable signal medium. More specific examples of machine-readable storage media include electrical connections based on one or more wires, portable computer disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fibers, portable compact disk read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination thereof.

[0114] To provide interaction with a user, the systems and techniques described herein can be implemented on an electronic device having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to the user; and a keyboard and pointing device (e.g., a mouse or trackball) through which the user provides input to the electronic device. Other types of devices can also be used to provide interaction with the user; for example, feedback provided to the user can be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user can be received in any form (including sound input, voice input, or tactile input).

[0115] The systems and technologies described herein can be implemented in computing systems that include backend components (e.g., as data servers), or middleware components (e.g., application servers), or frontend components (e.g., user computers with graphical user interfaces or web browsers through which users can interact with implementations of the systems and technologies described herein), or any combination of such backend, middleware, or frontend components. The components of the system can be interconnected via digital data communication of any form or medium (e.g., communication networks). Examples of communication networks include local area networks (LANs), wide area networks (WANs), blockchain networks, and the Internet.

[0116] A computing system can include clients and servers. Clients and servers are generally located far apart and typically interact through communication networks. The client-server relationship is created by computer programs running on the respective computers and having a client-server relationship with each other. The server can be a cloud server, also known as a cloud computing server or cloud host, which is a hosting product within the cloud computing service system to address the shortcomings of traditional physical hosts and VPS services, such as high management difficulty and weak business scalability.

[0117] It should be understood that the various forms of processes shown above can be used, with steps reordered, added, or deleted. For example, the steps described in this invention can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution of this invention can be achieved, and this is not limited herein.

[0118] The specific embodiments described above do not constitute a limitation on the scope of protection of this invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A method for detecting when a vehicle's steering wheel is removed from the hands, characterized in that, An electrode array is embedded in a vehicle steering wheel, wherein a first end of the electrode array is connected to a signal generator and a second end of the electrode array is connected to a signal acquisition unit. The method includes: The signal generator injects an electrical pulse into the vehicle steering wheel; The signal acquisition device obtains the driver's bioelectric response when the current pulse is injected into the vehicle's steering wheel. Based on the bioelectric response, a driver hands-off detection is performed on the vehicle steering wheel to determine the hands-off detection result.

2. The method according to claim 1, characterized in that, Injecting electrical pulses into the vehicle steering wheel via the signal generator includes: The signal generator injects current pulses into the vehicle steering wheel that meet human safety requirements and include a first preset frequency and a second preset frequency. Wherein, the first preset frequency is less than the second preset frequency.

3. The method according to claim 2, characterized in that, The first preset frequency is a value within the range (0, 50] Hertz; the second preset frequency is a value within the range [50, 200] Hertz.

4. The method according to claim 1, characterized in that, The signal acquisition device obtains the driver's bioelectrical response when the current pulse is injected into the vehicle steering wheel, including: The signal acquisition device acquires the phase difference between voltage and current in the driver's bioelectric response and / or impedance value when the current pulse is injected into the vehicle steering wheel.

5. The method according to claim 4, characterized in that, Based on the aforementioned bioelectric response, a driver hands-off detection is performed on the vehicle steering wheel to determine the hands-off detection result, including: When the phase difference is negative, and / or when the impedance value meets the preset human skin impedance characteristics, the hand-off detection result is determined to be driving without taking off the hands; Otherwise, the hands-free detection result is determined to be hands-free driving.

6. The method according to claim 5, characterized in that, Before determining the hands-free detection result as "driving without taking your hands off the wheel" when the phase difference is negative and / or when the impedance value meets the preset human skin impedance characteristics, the method further includes: Obtain the first impedance value corresponding to the first preset frequency and the second impedance value corresponding to the second preset frequency; When the first impedance value is greater than the second impedance value, it is determined that the impedance value meets the preset human skin impedance characteristics.

7. The method according to claim 1, characterized in that, After performing a driver hands-off detection on the vehicle steering wheel based on the bioelectric response and determining the hands-off detection result, the process further includes: When the hands-free detection result indicates that the driver has not taken their hands off the wheel, the vehicle's driver assistance system or automatic driving system will be disengaged.

8. An electronic device, characterized in that, The electronic device includes: At least one processor; and A memory communicatively connected to the at least one processor; wherein, The memory stores a computer program that can be executed by the at least one processor, the computer program being executed by the at least one processor to enable the at least one processor to perform the vehicle steering wheel hands-off detection method according to any one of claims 1-7.

9. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer instructions that, when executed by a processor, implement the vehicle steering wheel hands-off detection method according to any one of claims 1-7.

10. A computer program product comprising a computer program that, when executed by a processor, implements the vehicle steering wheel hands-off detection method according to any one of claims 1-7.

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