Contact detection method, device, controller, vehicle and medium for steering wheel

Abstract

The application discloses a steering wheel contact detection method and device, a controller, a vehicle and a medium. Detection data of a steering wheel is acquired. Adjustment data corresponding to the steering wheel is acquired. The adjustment data indicates a change characteristic of historical detection data of the detection data affected by an environment. Based on the adjustment data and the detection data, a contact detection result of the steering wheel is determined. The contact detection result of the steering wheel can be accurately determined, and driving safety is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electronics, in particular to a steering wheel contact detection method and device, a controller, a vehicle and a medium, wherein the storage medium is a computer readable storage medium, and the product is a computer program product. BACKGROUND

[0002] With the rapid development of technology and economy, people pay more and more attention to driving safety. If a driver does not hold the steering wheel of a vehicle, there is a greater security risk. Therefore, it is very important to detect whether the driver's hand is on the steering wheel, which can also improve the safety during driving. SUMMARY

[0003] The embodiments of the present application provide a steering wheel contact detection method, device, controller, vehicle and medium, which can accurately determine the contact detection result of the steering wheel and improve driving safety.

[0004] In order to achieve the above purpose, according to a first aspect of the present application, a steering wheel contact detection method is provided, comprising:

[0005] obtaining detection data for the steering wheel;

[0006] obtaining adjustment data corresponding to the steering wheel, the adjustment data indicating a change feature of historical detection data corresponding to the detection data affected by the environment;

[0007] determining a contact detection result of the steering wheel based on the adjustment data and the detection data.

[0008] According to a second aspect of the present application, a steering wheel contact detection device is provided, comprising:

[0009] a first obtaining unit configured to obtain detection data for the steering wheel;

[0010] a second obtaining unit configured to obtain adjustment data corresponding to the steering wheel, the adjustment data indicating a change feature of historical detection data corresponding to the detection data affected by the environment;

[0011] a result determining unit configured to determine a contact detection result of the steering wheel based on the adjustment data and the detection data.

[0012] According to a third aspect of the present application, a controller is provided, comprising a memory and a processor; the memory stores a computer program, and the processor is configured to run the computer program in the memory to execute any of the steering wheel contact detection methods provided by the embodiments of the present application.

[0013] According to a fourth aspect of the present application, a vehicle is provided, the vehicle comprising a controller, the vehicle performing any of the steering wheel contact detection methods provided by the embodiments of the present application through the controller.

[0014] According to a fifth aspect of the present application, a computer readable storage medium is provided, the computer readable storage medium being configured to store a computer program, the computer program being loaded by a processor to perform any of the steering wheel contact detection methods provided by the embodiments of the present application.

[0015] According to a sixth aspect of the present application, a computer program product is provided, the computer program product comprising a computer program or instructions, the computer program or instructions being loaded by a processor to perform any of the steering wheel contact detection methods provided by the embodiments of the present application.

[0016] The embodiments of the present application can accurately determine the contact detection result of the steering wheel and improve driving safety by obtaining detection data for the steering wheel, obtaining adjustment data corresponding to the steering wheel, the adjustment data indicating a change feature of historical detection data corresponding to the detection data affected by the environment, and determining the contact detection result of the steering wheel based on the adjustment data and the detection data. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0018] Figure 1 is a flowchart of the steering wheel contact detection method provided by the embodiments of the present application;

[0019] Figure 2 is a data anomaly detection flowchart provided by the embodiments of the present application;

[0020] Figure 3 is a schematic diagram of the steering wheel contact detection system provided by the embodiments of the present application;

[0021] Figure 4 is a schematic diagram of the steering wheel contact detection device provided by the embodiments of the present application;

[0022] Figure 5 is a structural schematic diagram of the controller provided by the embodiments of the present application. DETAILED DESCRIPTION

[0023] With reference to the drawings and the embodiments of the present application, the technical solutions in the embodiments of the present application will be described clearly and completely. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative work fall within the scope of the present application.

[0024] The present application provides a steering wheel contact detection method, device, vehicle and computer readable storage medium. The steering wheel contact detection device can be integrated in the vehicle.

[0025] The following will be described in detail. It should be noted that the description order of the following embodiments is not limited as the preferred order of the embodiments.

[0026] The present application will be described from the perspective of the steering wheel contact detection device, which can be integrated in the vehicle.

[0027] The present application provides a steering wheel contact detection method, device, vehicle and computer readable storage medium. The steering wheel contact detection device can be integrated in the vehicle. Figure 1 As shown in the steering wheel contact detection method, the specific process of the steering wheel contact detection method can be as follows:

[0028] 101, obtaining detection data for the steering wheel;

[0029] The detection data is data obtained by detecting the contact condition of the steering wheel, for example, image data about the steering wheel can be collected by a camera, so as to determine whether the driver holds the steering wheel by processing the image data. For example, the thermal image detected by the infrared sensor can be used to determine whether the driver's hand holds the steering wheel based on the temperature in the thermal image.

[0030] Optionally, the detection data can also be data detected by the capacitive sensor installed on the steering wheel. The area of the hand contacting the steering wheel is different, and the capacitance detected by the capacitive sensor is different. Therefore, the capacitance value detected by the capacitive sensor can be used to determine whether the steering wheel is in the contacted state. If the steering wheel is not in the contacted state, it can be indicated that the user has left the hand and does not hold the steering wheel.

[0031] For example, the capacitive sensor is based on in-phase (I, In-phase) and quadrature phase (Q, Quadrature) modulation technology, wherein the in-phase signal I can measure the resistance R, and the quadrature signal Q can measure the capacitance C. The capacitive sensor sends a sinusoidal current to the load composed of the steering wheel and the capacitance change caused by the hand holding the steering wheel; after detecting the load, the chip converts the current into voltage; the voltage on the load is filtered through the ADC and finally the I of the resistance component and the Q of the capacitive component are obtained through the demodulator. The MCU of the steering wheel reads the capacitance data and the corrected capacitance data (i.e. the detection reference data hereinafter) of the capacitive sensor through SPI, and the data transmission rate of the capacitive sensor is 50 data per second. After the MCU reads the I and Q data, the capacitance value is obtained through vector calculation.

[0032] The range of the capacitance value is 0-3FFF, and the contact detection result cannot be well determined when the capacitance value is too large or too small. If the capacitive sensor is disturbed and abnormal noise occurs in the capacitance value, it will also lead to inaccurate contact detection result, and even cause misjudgment to continue after the subsequent data stabilizes. Therefore, before determining the contact detection result of the steering wheel, it is determined whether the capacitance value is abnormal, and if it is abnormal, the contact detection result of the steering wheel is determined after delaying 5s and waiting for the data to stabilize.

[0033] Optionally, as shown in Figure 2 If 5 capacitance values are greater than 3FFF (the maximum value) or less than 0 (the minimum value), and / or the slope corresponding to the continuous 50 capacitance values is greater than the preset threshold, the abnormal Flag is set to 1. If the abnormal Flag is 1, the contact detection result of the steering wheel is determined after delaying 5s and waiting for the data to stabilize.

[0034] 102, obtaining adjustment data corresponding to the steering wheel, the adjustment data indicating a change feature of historical detection data corresponding to the detection data affected by the environment.

[0035] Since the temperature, humidity and other factors of the steering wheel environment may change, the environmental change will cause the detection data obtained for the steering wheel to be different under the same contact condition, for example, the detection data is the capacitance value detected by the capacitive sensor. Because the temperature will affect the capacitance value, the capacitance value detected by the capacitive sensor in the steering wheel under the same condition that the user does not contact the steering wheel is different in different temperature environments.

[0036] If the change of the detection data caused by the environmental change is not considered, it will cause the contact detection result of the steering wheel to be wrong. When the user leaves the hand, the detection data A detected at temperature A is different from the detection data B detected at temperature B, which will cause the contact detection result at temperature B to be wrong.

[0037] The adjustment data can indicate a change feature of the historical detection data affected by the environment, for example, a change of the historical detection data caused by the environment change under the same contact condition.

[0038] The adjustment data can be determined based on a plurality of historical detection data obtained under the same contact condition, for example, the historical detection data detected at different times when the steering wheel is in the non-contact state, and the adjustment value is determined based on at least two historical detection data, and optionally, the adjustment value can also be determined based on the historical detection data obtained at different times when the steering wheel is in the contacted state, that is, in an embodiment, the step of "determining the adjustment data corresponding to the steering wheel" can include:

[0039] obtaining at least two historical detection data for the steering wheel in the contacted state of the steering wheel, the at least two historical detection data being detected in different environments at different times when the steering wheel is in the contacted state;

[0040] determining the adjustment data corresponding to the steering wheel according to the at least two historical detection data.

[0041] The at least two historical detection data can be detected when the steering wheel is in the contacted state before the detection data is obtained, and the at least two historical detection data are detected for the steering wheel in the different environments at different times when the steering wheel is in the contacted state, for example, the at least two historical detection data can include the detection data detected 2s after the user holds the steering wheel and the detection data detected 2s before the user releases the steering wheel; or other detection data corresponding to other times, which are not limited herein.

[0042] Optionally, the at least two historical detection data can be obtained when the detection data satisfies the first preset condition, that is, in an embodiment, the step of "obtaining at least two historical detection data for the steering wheel in the contacted state of the steering wheel" includes:

[0043] If the detection data satisfies the first preset condition, obtaining at least two historical detection data for the steering wheel in the contacted state of the steering wheel.

[0044] If the detection data satisfies the first preset condition, it can be indicated that the change speed corresponding to the detection data is greater than or less than a preset change speed threshold, and the change speed corresponding to the detection data can be determined based on historical detection data and the detection data. Optionally, the detection data satisfying the first preset condition can indicate that the detection data can be data detected when the user's hand just leaves the steering wheel or data detected when the user's hand holds the steering wheel. For example, if the detection data is obtained by a capacitive sensor, when the user's hand just leaves the steering wheel, the capacitance value will suddenly decrease, that is, the change speed of the capacitance value at this moment will be less than 0, and the absolute value will be greater than a preset threshold. If the user just holds the steering wheel, the capacitance value will suddenly increase, that is, the change speed of the capacitance value at this moment will be greater than 0, and the absolute value will be greater than a preset threshold.

[0045] In an embodiment, the first preset condition includes that a difference between the detection data and the historical detection data satisfies a preset difference condition, and the first detection data is detected after the historical contact detection result indicates that the steering wheel is in a contacted state.

[0046] The difference between the detection data and the historical detection data being greater than the preset difference condition can include that an absolute value of a difference between the detection data and the historical detection data is greater than a preset difference threshold, and can also be that an absolute value of a data change speed corresponding to a detection time of the detection data is greater than a preset threshold.

[0047] For example, when the absolute value of the data change speed corresponding to the detection time of the detection data is greater than the preset change speed threshold, and the historical contact detection result indicates that the steering wheel is in a contacted state, at least two historical detection data detected in the contacted state are obtained.

[0048] In order to improve the detection accuracy, the historical detection data of the detection data in the past n seconds can be used as one of the historical detection data, that is, in an embodiment, a first historical detection data in the at least two historical detection data and a detection time interval of the detection data satisfy a first preset time interval.

[0049] The first historical detection data is one of the at least two historical detection data, and the first preset time interval can be 0.5s, 1s or 2s, etc.

[0050] Optionally, the detection data detected 2s after the steering wheel starts to be in a contacted state can also be used as one of the historical detection data, that is, the at least two historical detection data further include a second historical detection data, a detection time of the second historical detection data and a target time interval satisfy a second preset time interval condition, and the target time is a time when the steering wheel starts to be in a contacted state.

[0051] The second historical detection data can be one of the at least two historical detection data.

[0052] Optionally, the detection data detected 2s after the steering wheel last time starts to be in the touched state before the touched state ends can be acquired.

[0053] The following is based on the example of the detection data detected by the capacitive sensor. When the hand just places on the steering wheel or just leaves the steering wheel, the capacitance value will suddenly increase or decrease, that is, the corresponding capacitance value change slope at this moment will suddenly increase or decrease, so the slope of the corresponding capacitance value at each detection moment can be calculated, and when the absolute value of the slope of the capacitance value is greater than a threshold, the mutation flag bit is set to 1.

[0054] When the mutation flag is 1, the mutation flag bit is accumulated. If the last historical detection result indicates that the steering wheel is in the untouched state, the mutation flag is accumulated from zero, otherwise, the accumulated value of the last mutation flag bit is added by 1.

[0055] The capacitance value when the hand just touches the steering wheel is recorded as data A, and the capacitance value before the hand leaves the steering wheel is recorded as data B.

[0056] If the mutation flag bit accumulation is equal to 0, data A is set to 0 and data B is set to 0; if the mutation flag bit accumulation is equal to 1, data A is set to 0 and data B is set to 0 2s before the mutation flag bit, and data A is set to the current capacitance value and data B is set to 0 after n seconds.

[0057] For example, assuming that the capacitive sensor transmits a capacitance value every 20ms, n is 2, and the count is from 0 when the mutation flag is 1. When the count is 100, the time is 2s, that is, the data A is set to the current capacitance value after a delay of 2s.

[0058] If the mutation flag bit accumulation is greater than 1, data A remains unchanged and data B is equal to the capacitance value n seconds before the mutation flag bit; and data A is equal to the current capacitance value and data B remains unchanged n seconds after the mutation flag is 1.

[0059] For example, assuming that the capacitive sensor transmits a capacitance value every 20ms, n is 2, and the count is from 0 when the mutation flag bit is 1. When the count is 100, that is, the data A is equal to the capacitance value after a delay of 2s, and the data B remains unchanged.

[0060] 103、Based on the adjustment data and the detection data, the contact detection result of the steering wheel is determined.

[0061] Since the adjustment data can indicate the difference between the detection data obtained under the same contact condition of the steering wheel due to the influence of the environment, the contact detection result of the steering wheel can be determined based on the adjustment data and the detection data to improve the accuracy of the detection.

[0062] Specifically, the detection data can be subtracted by the adjustment data to obtain adjusted detection data, and the adjusted detection data and the preset detection data are compared to determine the contact detection result of the steering wheel. For example, if the difference between the adjusted detection data and the preset detection data is greater than a preset first threshold, it is determined that the user holds the steering wheel, and if the difference between the adjusted detection data and the preset detection data is less than a preset second threshold, it is determined that the user's hand is away from the steering wheel. The preset first threshold and the preset second threshold can be the same or different. The preset detection data can indicate the detection data when the steering wheel is in the non-contact state, so the contact detection result can be determined based on the adjusted detection data and the preset detection data.

[0063] In an embodiment, the reference for determining whether the steering wheel is in the contacted state can be determined according to historical detection data. For example, when the steering wheel is in the contacted state, the historical detection data in the non-contact state can be compared with the current detection data to determine whether the steering wheel is in the contacted state or the non-contact state. Optionally, the contact detection result can also be determined according to the last detected historical detection data. In an embodiment, the step of “determining the contact detection result of the steering wheel based on the adjustment data and the detection data” can include:

[0064] determining the detection reference data corresponding to the steering wheel;

[0065] determining the contact detection result of the steering wheel based on the adjustment data, the detection reference data and the detection data.

[0066] The target historical detection data can be used to determine the detection reference data, and the detection reference data indicates the detection data corresponding to the steering wheel when the steering wheel is in the non-contact state. Specifically, the detection reference data can be determined according to the historical detection reference data and the current detection data. In an embodiment, the step of “determining the detection reference data corresponding to the steering wheel” includes:

[0067] obtaining the historical detection reference data;

[0068] determining the detection reference data from the historical detection reference data and the detection data according to a first difference between the historical detection reference data and the detection data.

[0069] The historical detection reference data can be detection reference data corresponding to a previous detection time. If a difference (i.e., the first difference) between the detection data and the historical detection reference data is small, it can be considered that the steering wheel is in the non-contact state, and the current detection data is equivalent to the detection reference data. The current detection data can be determined as the detection reference data. If the detection data and the historical detection reference data differ greatly, it can be considered that the steering wheel is not in the non-contact state, and the historical detection reference data is determined as the detection reference data corresponding to the current time.

[0070] Optionally, after the detection reference data is determined, the detection reference data can be subjected to arithmetic average filtering processing. Specifically, the detection data set and a plurality of historical detection reference data obtained in the past m seconds can be subjected to arithmetic average filtering processing, so that the detection reference data is smoother.

[0071] Optionally, the detection reference data can be determined from the historical detection reference data and the detection data by using a first preset threshold. The step of "determining the detection reference data from the historical detection reference data and the detection data according to a first difference between the historical detection reference data and the detection data" includes:

[0072] If the first difference is not greater than the first preset threshold, the detection data is determined as the detection reference data.

[0073] If the first difference is greater than the first preset threshold, the historical detection reference data is determined as the detection reference data.

[0074] Specifically, if the first difference is not greater than the first preset threshold, the detection data is determined as the detection reference data. If the first difference is greater than the first preset threshold, the historical detection reference data is determined as the detection reference data.

[0075] Based on the size relationship between the first difference and the first preset threshold, the detection reference data can be updated when the steering wheel is in the non-contact state. Based on the updated detection reference data, the contact detection result of the steering wheel can be determined more accurately.

[0076] The adjustment data can be used to adjust the detection reference data, so as to avoid the detection reference data being inaccurate after the steering wheel is in the contact state for a long time, and to avoid the contact detection result of the steering wheel being inaccurate. In an embodiment, the step of "determining the contact detection result of the steering wheel based on the adjustment data, the detection reference data and the detection data" can include:

[0077] The detection reference data is adjusted based on the adjustment data to obtain adjusted detection reference data.

[0078] Based on the adjusted detection reference data and the detection data, a contact detection result of the steering wheel is determined.

[0079] Specifically, the adjustment data and the detection reference data can be added to adjust the detection reference data to obtain the adjusted detection reference data; or the adjustment data and the detection reference data can be multiplied to obtain the adjusted detection reference data.

[0080] The contact detection result of the steering wheel can be determined based on the adjusted detection reference data and the detection data, that is, in an embodiment, the step of “determining the contact detection result of the steering wheel based on the adjusted detection reference data and the detection data” can include:

[0081] determining a fourth difference between the adjusted detection reference data and the detection data;

[0082] If the fourth difference is greater than a fourth preset threshold, it is determined that the steering wheel is in a contacted state.

[0083] Specifically, the fourth difference between the adjusted detection reference data and the detection data is determined; if the fourth difference is greater than a fourth preset threshold, it is determined that the steering wheel is in a contacted state.

[0084] Optionally, if the fourth difference is not greater than the fourth preset threshold, it is determined that the steering wheel is in an uncontacted state.

[0085] Optionally, if the fourth difference is less than a fifth preset threshold, it is determined that the steering wheel is in an uncontacted state. The fourth preset threshold and the fifth preset threshold are different, and the fifth preset threshold is less than the fourth preset threshold. The fourth preset threshold can be data detected when three fingers contact the steering wheel, and the fifth preset threshold can be data detected when two fingers contact the steering wheel. By setting two different thresholds, the contact detection result can be prevented from jumping back and forth between the uncontacted state and the contacted state of the steering wheel.

[0086] Optionally, the adjusted reference data can also be updated, for example, the adjusted reference data can be updated when the conditions are met, that is, before the step of “determining the contact detection result of the steering wheel based on the adjusted detection reference data and the detection data”, the steering wheel contact detection method provided by the present application can further include:

[0087] If at least one historical contact detection result indicates that the steering wheel is in an uncontacted state, the adjusted detection reference data satisfies a second preset condition, and / or the detection data satisfies a third preset condition, the step of “determining the adjustment data corresponding to the steering wheel” is returned to be executed.

[0088] Specifically, if the at least one historical contact detection result indicates that the steering wheel is in the non-contact state, the adjusted detection reference data meets the second preset condition, or the detection data meets the third preset condition, new adjustment data corresponding to the steering wheel is obtained, that is, step 102 is returned to execute, so as to detect the steering wheel based on the new adjustment data to determine the contact detection result.

[0089] Optionally, new adjustment data corresponding to the steering wheel can also be obtained when the at least one historical contact detection result indicates that the steering wheel is in the non-contact state, the adjusted detection reference data meets the second preset condition, and the detection data meets the third preset condition.

[0090] Optionally, new adjustment data corresponding to the steering wheel can also be obtained when at least two of the at least one historical contact detection result indicates that the steering wheel is in the non-contact state, the adjusted detection reference data meets the second preset condition, and the detection data meets the third preset condition.

[0091] The at least one historical contact detection result is, for example, five historical contact detection results, or the historical contact detection results in a period of time are all indicative of the steering wheel being in the non-contact state, for example, the contact detection results in the past 5s are all indicative of the steering wheel being in the non-contact state.

[0092] Optionally, the second preset condition includes that a second difference between the adjusted detection reference data and the detection reference data is less than a second preset threshold, and / or a third difference between the adjusted detection reference data and the detection data is greater than a third preset threshold.

[0093] The detection reference data can be preset data, or can be obtained based on a target detection device. The target detection device can be in the same environment as the steering wheel, but is not used to detect the detection data of the steering wheel. For example, the detection data is detected by a capacitive sensor, and the target detection device can be a capacitor that is affected by the environment in the same way as the steering wheel, and thus can be used to determine whether the detection reference data is abnormal.

[0094] Optionally, the third preset condition includes that a change speed corresponding to the detection data is greater than a preset change speed.

[0095] In an embodiment, the detection data is detected by a capacitive sensor configured in the steering wheel. Optionally, the capacitive sensor has a plurality of capacitive sensors arranged at different positions of the steering wheel.

[0096] Optionally, the detection data has a plurality of detection data, each detection data is detected by a corresponding capacitive sensor, and the step of "determining the contact detection result of the steering wheel based on the adjustment data and the detection data" can include:

[0097] determine a plurality of contact detection sub-results based on each of the detection data and the adjustment data;

[0098] determine a contact detection result of the steering wheel according to the plurality of contact detection sub-results.

[0099] For example, each contact detection sub-result can indicate whether a hand of the user is on the detection area corresponding to the capacitive sensor, and if at least two contact detection sub-results indicate that the user holds the detection area, it is determined that the steering wheel is in a contacted state, otherwise it is considered that the steering wheel is in an uncontacted state.

[0100] Optionally, the contact detection result can also indicate the area of the steering wheel that is contacted, and display prompt information according to the contacted area. For example, the capacitive sensors can be distributed in five areas of the upper left area, the lower left area, the upper right area, the lower right area and the lower area of the steering wheel, and the contact prompt information can be displayed according to the detection result. The contact prompt information can prompt the user which area of the steering wheel is currently contacted.

[0101] Optionally, the contact detection result is used to indicate whether the steering wheel is in a hands-off state, and the contacted state corresponds to a hands-on state, and the uncontacted state corresponds to a hands-off state. Only when both hands of the user hold the steering wheel, that is, two or more contact detection sub-results indicate that the user holds the detection area, it is determined that the steering wheel is in a hands-on state, otherwise it is considered that the steering wheel is in a hands-off state. The contact detection method of the steering wheel provided in the present application can be applied to an intelligent driving scene. In the intelligent driving scene, it is detected whether the user holds the steering wheel. If the user does not hold the steering wheel, a prompt information is output to remind the user to hold the steering wheel, so as to avoid traffic accidents.

[0102] If the contact detection result indicates that the steering wheel is in a hands-off state, the vehicle on which the steering wheel is located can also output a prompt information to remind the driver to hold the steering wheel with both hands to avoid accidents. In an embodiment, the contact detection result is used to indicate whether the steering wheel is in a hands-off state, and the steering wheel is arranged in a vehicle. The contact detection method of the steering wheel provided in the embodiment of the present application further comprises:

[0103] If the contact detection result indicates that the steering wheel is in a hands-off state, the vehicle on which the steering wheel is located can also output a prompt information to remind the driver to hold the steering wheel with both hands to avoid accidents. In an embodiment, the contact detection result is used to indicate whether the steering wheel is in a hands-off state, and the steering wheel is arranged in a vehicle. The contact detection method of the steering wheel provided in the embodiment of the present application further comprises:

[0104] The prompt information can include audio, text and other types of information, and can be output through a loudspeaker in the vehicle or a prompt audio with specific content, for example, outputting "please hold the steering wheel" and the like. It can also be prompted through the instrument panel of the vehicle, or the prompt message can be displayed on the display screen of the vehicle, such as displaying text information such as "please hold the steering wheel" or image information indicating that the steering wheel is not currently held.

[0105] For example, as shown in FIG. 1, the steering wheel 100 is arranged in a vehicle 200. The steering wheel 100 is provided with a plurality of capacitive sensors 110, and the capacitive sensors 110 are arranged in a plurality of detection areas 120 of the steering wheel 100. The capacitive sensors 110 are used to detect whether a user's hand is on the detection area 120 corresponding to the capacitive sensor 110. Figure 3As shown, the contact detection system of the steering wheel can include a HOD (Hands On / Off Detection) capacitive sensor, transmit the HOD capacitive sensor data to the steering wheel MCU through SPI, and determine whether the steering wheel is in the off-hand state according to the collected capacitive value data.

[0106] When the hand contacts the steering wheel, the capacitive value changes, and the larger the area of the hand contacting the steering wheel, the greater the change in the capacitive value. When the hand leaves the steering wheel, the capacitive value returns to its original state. The steering wheel microcontroller MCU reads the data of the off-hand detection capacitive sensor through SPI; according to the data analysis and algorithm processing of the read data, the off-hand detection result (i.e. contact detection result) is obtained, and the signal of the off-hand detection result is output; according to the off-hand detection result, a flag prompt is generated by using an execution module to prompt the driver to drive safely. If the capacitive value of the HOD capacitive sensor instantaneously increases, it indicates that the driver is driving with his hand on the steering wheel. Through data transmission and algorithm processing, the signal of the hand is output, and the voice prompt is stopped.

[0107] Optionally, the contact detection result can also indicate a contact operation performed by the target object on the steering wheel, such as a sliding operation or a tapping operation, and perform a corresponding feedback operation according to the contact operation. In an embodiment, the steering wheel is configured in a vehicle, and the steering wheel contact detection method provided by the embodiment of the application can further include:

[0108] If the contact detection result indicates a contact operation performed by the target object on the steering wheel, the vehicle is controlled to perform a feedback operation corresponding to the contact operation.

[0109] If the user taps the steering wheel, the contact detection result will quickly switch from indicating that the steering wheel is in the off-hand state to indicating that the steering wheel is in the on-hand state. If the user slides on the steering wheel, the detection data changes during the process of the contact detection data indicating that the steering wheel is in the on-hand state to the off-hand state, so the contact operation performed by the target object on the steering wheel can be determined based on the contact detection result.

[0110] The vehicle is controlled to perform a corresponding feedback operation according to the contact operation, such as turning on the turn signal, turning on the wiper, dialing an emergency phone, etc.

[0111] In an embodiment, the feedback operation includes a tapping operation, and the step "if the contact detection result indicates a contact operation performed by the target object on the steering wheel, the vehicle is controlled to perform a feedback operation corresponding to the contact operation" includes:

[0112] If the contact detection result indicates that the target object performs a tapping operation on the steering wheel, the vehicle is controlled to perform a preset first feedback operation.

[0113] In an embodiment, the feedback operation includes a sliding operation, if the contact detection result indicates that the target object performs a contact operation on the steering wheel, the vehicle is controlled to perform a feedback operation corresponding to the contact operation, including:

[0114] If the contact detection result indicates that the target object performs a sliding operation on the steering wheel, the vehicle is controlled to perform a preset second feedback operation.

[0115] For example, if it is determined according to the contact detection result and the historical contact detection result that the target object taps the steering wheel five times, the vehicle is controlled to dial an emergency number, such as 110, 119 and / or 120, so that when the driver is physically uncomfortable during driving or an accident occurs during driving and cannot dial a phone number, the driver can call for help by tapping the steering wheel.

[0116] Optionally, the detection data can be detected by a capacitive sensor, and a plurality of capacitive sensors can be arranged on the steering wheel. The contact detection result obtained based on the detection data of each capacitive sensor can include a plurality of sub-contact detection results. The contact operation can be determined according to the contact detection result, and the operation area can be determined. According to the contact operation and the operation area, the corresponding feedback operation is performed. The triggered feedback operation can be different when the contact operation is different or the operation area is different. For example, when it is detected that the left area of the steering wheel is tapped more than five times in succession, the multimedia of the vehicle is controlled to dial 120, and when it is detected that the right area of the steering wheel is tapped more than five times in succession, the multimedia of the vehicle is controlled to dial 119. If it is detected that the target object performs an operation on the left area of the steering wheel, the vehicle is controlled to turn on the left turn signal, if it is detected that the target object performs a sliding operation on the right area of the steering wheel, the vehicle is controlled to turn on the right turn signal, and if it is detected that the target object performs a sliding operation on the lower area of the steering wheel, the vehicle is controlled to turn on the wiper.

[0117] As can be seen from the above, the embodiment of the present application obtains detection data for the steering wheel, obtains adjustment data corresponding to the steering wheel, the adjustment data indicating a change feature of historical detection data corresponding to the detection data affected by the environment, and determines a contact detection result of the steering wheel based on the adjustment data and the detection data. The contact detection result for the steering wheel can be accurately determined, and the driving safety is improved.

[0118] In order to better implement the contact detection method of the steering wheel provided by the embodiment of the present application, in an embodiment, a contact detection device of a steering wheel is also provided. The meanings of the terms are the same as those in the above contact detection method of the steering wheel, and the specific implementation details can be referred to the description in the method embodiment.

[0119] The contact detection device of the steering wheel can be integrated in a vehicle, for example, Figure 4As shown, the contact detection apparatus of the steering wheel can include a first obtaining unit 301, a second obtaining unit 302, and a result determining unit 303, which are specifically as follows:

[0120] (1) The first obtaining unit 301 is configured to obtain detection data of the steering wheel.

[0121] (2) The second obtaining unit 302 is configured to obtain adjustment data corresponding to the steering wheel, the adjustment data indicating a change feature of historical detection data corresponding to the detection data affected by an environment.

[0122] (3) The result determining unit 303 is configured to determine a contact detection result of the steering wheel based on the adjustment data and the detection data.

[0123] In an embodiment, the second obtaining unit 302 can be further configured to:

[0124] obtain at least two historical detection data of the steering wheel in a state of being contacted, the at least two historical detection data being obtained in different environments in which the steering wheel is located at different time points;

[0125] determine the adjustment data corresponding to the steering wheel according to the at least two historical detection data.

[0126] In an embodiment, the second obtaining unit 302 can be further configured to:

[0127] if the detection data satisfies a first preset condition, obtain at least two historical detection data of the steering wheel in a state of being contacted.

[0128] In an embodiment, the first preset condition includes that a difference between the first detection data and the historical detection data satisfies a preset difference condition, and the first detection data is obtained after a historical contact detection result indicates that the steering wheel is in a state of being contacted.

[0129] In an embodiment, a detection time of a first historical detection data in the at least two historical detection data and the detection data satisfies a first preset time interval.

[0130] In an embodiment, the at least two historical detection data include a second historical detection data, a detection time of the second historical detection data and a target time satisfy a second preset time interval condition, and the target time is a time when the steering wheel starts to be contacted.

[0131] In an embodiment, the result determining unit 303 can be further configured to determine detection reference data corresponding to the steering wheel.

[0132] determine a contact detection result of the steering wheel based on the adjustment data, the detection reference data and the detection data.

[0133] In an embodiment, the result determination unit 303 can be further configured to:

[0134] obtain historical detection reference data;

[0135] determine the detection reference data from the historical detection reference data and the detection data according to a first difference between the historical detection reference data and the detection data.

[0136] In an embodiment, the result determination unit 303 can be further configured to:

[0137] if the first difference is not greater than a first preset threshold, determine that the detection data is the detection reference data;

[0138] if the first difference is greater than the first preset threshold, determine that the historical detection reference data is the detection reference data.

[0139] In an embodiment, the result determination unit 303 can be further configured to:

[0140] adjust the detection reference data based on the adjustment data to obtain adjusted detection reference data;

[0141] determine a contact detection result of the steering wheel based on the adjusted detection reference data and the detection data.

[0142] In an embodiment, the result determination unit 303 can be further configured to:

[0143] determine a fourth difference between the adjusted detection reference data and the detection data;

[0144] if the fourth difference is greater than a fourth preset threshold, determine that the steering wheel is in a contacted state.

[0145] In an embodiment, the result determination unit 303 can be further configured to:

[0146] if the fourth difference is less than a fifth preset threshold, determine that the steering wheel is in an un-contacted state.

[0147] In an embodiment, the contact detection device of the steering wheel provided by the embodiments of the present application can further include:

[0148] If the at least one historical contact detection result indicates that the steering wheel is in an uncontacted state, the adjusted detection reference data satisfies a second preset condition, and / or the detection data satisfies a third preset condition, the method returns to the step of obtaining the adjustment data corresponding to the steering wheel.

[0149] In an embodiment, the second preset condition comprises that a second difference between the adjusted detection reference data and detection reference data is less than a second preset threshold, and / or a third difference between the adjusted detection reference data and the detection data is greater than a third preset threshold.

[0150] In an embodiment, the third preset condition comprises that a change speed corresponding to the detection data is greater than a preset change speed.

[0151] In an embodiment, the detection data is detected by a capacitive sensor arranged in the steering wheel.

[0152] In an embodiment, the capacitive sensor is arranged at different positions of the steering wheel.

[0153] In an embodiment, the detection data comprises a plurality of detection data, each detection data is detected by a corresponding capacitive sensor, and the result determination unit 303 is further configured to:

[0154] determine a plurality of contact detection sub-results based on each detection data and the adjustment data;

[0155] determine the contact detection result of the steering wheel according to the plurality of contact detection sub-results.

[0156] In an embodiment, the contact detection result is used to indicate whether the steering wheel is in a hands-off state, and the steering wheel is arranged in a vehicle, and the contact detection device of the steering wheel provided in the embodiment of the present application further comprises:

[0157] If the contact detection result indicates that the steering wheel is in the hands-off state, the vehicle is controlled to output a prompt information.

[0158] In an embodiment, the contact detection result further indicates a region of the steering wheel being contacted, and the contact detection device of the steering wheel provided in the embodiment of the present application further comprises:

[0159] a contact prompt information output unit configured to output a contact prompt information according to the contact detection result, the contact prompt information indicating the region of the steering wheel being contacted.

[0160] In an embodiment, the steering wheel is arranged in a vehicle, and the contact detection device of the steering wheel provided in the embodiment of the present application further comprises:

[0161] The feedback unit is configured to control the vehicle to perform a feedback operation corresponding to the contact operation of the target object on the steering wheel if the contact detection result indicates that the target object performs the contact operation on the steering wheel.

[0162] In an embodiment, the feedback operation includes a tapping operation.

[0163] The feedback unit can be further configured to:

[0164] The feedback unit can be further configured to:

[0165] In an embodiment, the feedback operation includes a sliding operation, and the feedback unit can be further configured to:

[0166] The feedback unit can be further configured to:

[0167] As can be seen from the above, the embodiments of the present application acquire the detection data for the steering wheel by the first acquisition unit 301, acquire the adjustment data corresponding to the steering wheel by the second acquisition unit 302, the adjustment data indicating the change characteristics of the historical detection data corresponding to the detection data affected by the environment, and determine the contact detection result of the steering wheel based on the adjustment data and the detection data by the result determination unit 303, so that the contact detection result for the steering wheel can be accurately determined, and the driving safety can be improved.

[0168] The embodiments of the present application also provide a controller, as shown in Figure 5 The controller structure involved in the embodiments of the present application is shown in the figure, and specifically:

[0169] The controller can include a processor 1001 with one or more processing cores, a memory 1002 with one or more computer readable storage media, a power supply 1003, an input unit 1004, and the like. Those skilled in the art can understand that the structure of the controller shown in the figure does not constitute a limitation on the controller, and can include more or fewer components than the figure, or combine certain components, or different component arrangements. Among them: Figure 5

[0170] ​The processor 1001 is the control center of the controller, and connects various parts of the controller through various interfaces and lines, and performs various functions of the controller and processes data by running or executing software programs and / or modules stored in the memory 1002 and calling data stored in the memory 1002, thereby overall monitoring the controller. Optionally, the processor 1001 can include one or more processing cores; preferably, the processor 1001 can integrate an application processor and a modem processor, wherein the application processor mainly processes operating systems, user interfaces, computer programs, etc., and the modem processor mainly processes wireless communication. It can be understood that the above-mentioned modem processor can also not be integrated into the processor 1001.

[0171] The memory 1002 can be used to store software programs and modules, and the processor 1001 executes various functions and data processing by running the software programs and modules stored in the memory 1002. The memory 1002 can mainly include a program storage area and a data storage area, wherein the program storage area can store operating systems, computer programs required by at least one function (such as sound playing function, image playing function, etc.), etc.; the data storage area can store data created according to the use of the controller, etc. In addition, the memory 1002 can include a high-speed random access memory, and can also include a non-volatile memory, such as at least one magnetic disk storage device, a flash memory device, or other volatile solid-state memory device. Accordingly, the memory 1002 can also include a memory controller to provide access for the processor 1001 to the memory 1002.

[0172] The controller also includes a power supply 1003 for supplying power to various components, and preferably, the power supply 1003 can be logically connected to the processor 1001 through a power management system, thereby realizing functions such as management of charging, discharging, and power consumption management through the power management system. The power supply 1003 can also include one or more than one direct current or alternating current power supply, a recharging system, a power failure detection circuit, a power converter or inverter, a power state indicator, etc. Any component.

[0173] The controller can also include an input unit 1004, which can be used to receive input digital or character information, and generate keyboard, mouse, joystick, optical or trackball data input related to user settings and function control.

[0174] Although not shown, the controller can also include a display unit, etc., which will not be described here. Specifically, in the present embodiment, the processor 1001 in the controller will load the executable file corresponding to the process of one or more computer programs into the memory 1002 according to the following instructions, and run the computer programs stored in the memory 1002 by the processor 1001, thereby realizing various functions, such as:

[0175] obtain detection data corresponding to the steering wheel;

[0176] obtain adjustment data corresponding to the steering wheel, the adjustment data indicating a change feature of historical detection data corresponding to the detection data affected by the environment;

[0177] determine the contact detection result of the steering wheel based on the adjustment data and the detection data, so that the contact detection result of the steering wheel can be accurately determined, and driving safety is improved.

[0178] The specific implementation of each operation can be referred to the foregoing embodiments, and will not be described here.

[0179] As can be seen from the above, in the embodiments of the present application, the controller obtains detection data corresponding to the steering wheel, obtains adjustment data corresponding to the steering wheel, the adjustment data indicating a change feature of historical detection data corresponding to the detection data affected by the environment, and determines the contact detection result of the steering wheel based on the adjustment data and the detection data, so that the contact detection result of the steering wheel can be accurately determined, and driving safety is improved.

[0180] According to an aspect of the present application, a vehicle is provided, which includes a controller and the like, and the vehicle can perform the dangerous help-seeking method provided in the embodiments of the present application. The vehicle can be a fuel automobile, a plug-in hybrid electric vehicle, or a new energy vehicle, and the present application does not make specific limitation thereto.

[0181] According to an aspect of the present application, a computer program product or a computer program is provided, which includes computer instructions stored in a computer readable storage medium. The processor of the controller reads the computer instructions from the computer readable storage medium, and the processor executes the computer instructions, so that the controller performs the method provided in various optional implementation manners in the above embodiments.

[0182] Those skilled in the art can understand that all or part of the steps in the various methods of the above embodiments can be completed by a computer program, or by a computer program controlling related hardware, which can be stored in a computer readable storage medium and loaded and executed by a processor.

[0183] To this end, the embodiments of the present application provide a computer readable storage medium, which stores a computer program. The computer program can be loaded by a processor to execute any one of the contact detection methods of the steering wheel provided in the embodiments of the present application.

[0184] The specific implementation of each operation can be referred to the foregoing embodiments, and will not be described here.

[0185] The computer readable storage medium can include a read only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, etc.

[0186] Due to the computer program stored in the computer readable storage medium, any one of the steering wheel contact detection methods provided by the embodiments of the present application can be executed, thus the beneficial effects of any one of the steering wheel contact detection methods provided by the embodiments of the present application can be achieved, which will be described in detail in the foregoing embodiments, and will not be described here.

[0187] The above describes in detail the steering wheel contact detection method, device, controller, vehicle, medium and product provided by the embodiments of the present application. The principles and implementation manners of the present application are described by applying specific examples. The above embodiment description is only used to help understand the method of the present application and its core idea. Meanwhile, for those skilled in the art, the specific implementation manners and application ranges will be changed according to the idea of the present application. In summary, the content of the specification should not be understood as a limitation of the present application.

Claims

1. A method for detecting contact of a steering wheel, characterized in that, include: Acquire detection data for the steering wheel; Obtain adjustment data corresponding to the steering wheel, wherein the adjustment data indicates the variation characteristics of historical detection data corresponding to the detection data under the influence of the environment; Based on the adjustment data and the detection data, the contact detection result of the steering wheel is determined; The step of determining the contact detection result of the steering wheel based on the adjustment data and the detection data includes: Determine the detection reference data corresponding to the steering wheel; Based on the adjustment data, the detection benchmark data, and the detection data, the contact detection result of the steering wheel is determined; The step of determining the contact detection result of the steering wheel based on the adjustment data, the detection reference data, and the detection data includes: The detection benchmark data is adjusted based on the adjustment data to obtain the adjusted detection benchmark data. Based on the adjusted detection benchmark data and the fourth difference of the detection data, it is determined that the steering wheel is in a contacted state, or that the steering wheel is in a non-contacted state.

2. The method according to claim 1, characterized in that, The step of obtaining the adjustment data corresponding to the steering wheel includes: Acquire at least two historical detection data points for the steering wheel when the steering wheel is in a contacted state, wherein the at least two historical detection data points are obtained from the environment in which the steering wheel is located at different times; Based on the at least two historical detection data, the adjustment data corresponding to the steering wheel is determined.

3. The method according to claim 2, characterized in that, The acquisition of at least two historical detection data points for the steering wheel when the steering wheel is in a contacted state includes: If the detection data meets the first preset condition, at least two historical detection data points for the steering wheel are acquired when the steering wheel is in a contacted state.

4. The method according to claim 3, characterized in that, The first preset condition includes that the difference between the first detection data and the historical detection data meets the preset difference condition, and the first detection data is obtained after the historical contact detection result indicates that the steering wheel is in a contacted state.

5. The method according to claim 2, characterized in that, The detection time interval between the first historical detection data and the detection data in the at least two historical detection data sets satisfies a first preset time interval.

6. The method according to claim 2, characterized in that, The at least two historical detection data include second historical detection data, and the interval between the detection time of the second historical detection data and the target time satisfies a second preset time interval condition, wherein the target time is the time when the steering wheel begins to be in a contact state.

7. The method according to claim 1, characterized in that, The determination of the detection reference data corresponding to the steering wheel includes: Obtain historical testing benchmark data; The detection benchmark data is determined from the historical detection benchmark data and the detection data based on the first difference between the historical detection benchmark data and the detection data.

8. The method according to claim 7, characterized in that, The step of determining the detection benchmark data from the historical detection benchmark data and the detection data based on a first difference between the historical detection benchmark data and the detection data includes: If the first difference is not greater than the first preset threshold, then the detection data is determined to be the detection benchmark data; If the first difference is greater than the first preset threshold, then the historical detection benchmark data is determined to be the detection benchmark data.

9. The method according to claim 1, characterized in that, The step of determining whether the steering wheel is in a contacted state or whether the steering wheel is in a non-contacted state based on the adjusted detection benchmark data and the fourth difference of the detection data includes: If the fourth difference is greater than the fourth preset threshold, it is determined that the steering wheel is in a contacted state.

10. The method according to claim 1, characterized in that, The step of determining whether the steering wheel is in a contacted state or whether the steering wheel is in a non-contacted state based on the adjusted detection benchmark data and the fourth difference of the detection data includes: If the fourth difference is less than the fifth preset threshold, it is determined that the steering wheel is in an untouched state.

11. The method according to claim 1, characterized in that, Before determining the contact detection result of the steering wheel, the method further includes: If at least one historical contact detection result indicates that the steering wheel is in an uncontacted state, the adjusted detection benchmark data meets the second preset condition, and / or the detection data meets the third preset condition, return to the step of obtaining the adjustment data corresponding to the steering wheel.

12. The method according to claim 11, characterized in that, The second preset condition includes a second difference between the adjusted detection benchmark data and the detection reference data being less than a second preset threshold, and / or a third difference between the adjusted detection benchmark data and the detection data being greater than a third preset threshold.

13. The method according to claim 11, characterized in that, The third preset condition includes the rate of change of the detected data being greater than a preset rate of change.

14. The method according to claim 1, characterized in that, The detection data is obtained through a capacitive sensor configured in the steering wheel.

15. The method according to claim 14, characterized in that, There are multiple capacitive sensors, which are respectively installed at different positions on the steering wheel.

16. The method according to claim 15, characterized in that, The detection data includes multiple data points, each obtained through a corresponding capacitive sensor. Determining the steering wheel's contact detection result based on the adjustment data and the detection data includes: Based on each of the aforementioned detection data and the aforementioned adjustment data, multiple contact detection sub-results are determined; The contact detection result of the steering wheel is determined based on the multiple contact detection sub-results.

17. The method according to any one of claims 1-16, characterized in that, The contact detection result is used to indicate whether the steering wheel is in a hands-free state, the steering wheel is configured in a vehicle, and the method further includes: If the contact detection result indicates that the steering wheel is in a hands-off state, control the vehicle to output a prompt message.

18. The method according to any one of claims 1-16, characterized in that, The contact detection result also indicates the area where the steering wheel was contacted, and the method further includes: Based on the contact detection results, a contact prompt message is output, indicating the area of ​​the steering wheel that has been contacted.

19. The method according to any one of claims 1-16, characterized in that, The steering wheel is disposed in the vehicle, and the method further includes: If the contact detection result indicates that the target object has made a contact operation with the steering wheel, then the vehicle is controlled to perform the feedback operation corresponding to the contact operation.

20. The method according to claim 19, characterized in that, The feedback operation includes a tapping operation. If the contact detection result indicates a contact operation of the target object with the steering wheel, the vehicle is controlled to execute the feedback operation corresponding to the contact operation, including: If the contact detection result indicates that the target object performs a tapping operation on the steering wheel, the vehicle is controlled to perform a preset first feedback operation.

21. The method according to claim 20, characterized in that, The feedback operation includes a sliding operation. If the contact detection result indicates a contact operation of the target object with respect to the steering wheel, then the vehicle is controlled to execute the feedback operation corresponding to the contact operation, including: If the contact detection result indicates that the target object performs a sliding operation on the steering wheel, the vehicle is controlled to perform a preset second feedback operation.

22. A contact detection device for a steering wheel, characterized in that, include: The first acquisition unit is used to acquire detection data for the steering wheel; The second acquisition unit is used to acquire adjustment data corresponding to the steering wheel, wherein the adjustment data indicates the change characteristics of historical detection data corresponding to the detection data under the influence of the environment. The result determination unit is used to determine the contact detection result of the steering wheel based on the adjustment data and the detection data; The result determination unit is also used for: Determine the detection reference data corresponding to the steering wheel; Based on the adjustment data, the detection benchmark data, and the detection data, the contact detection result of the steering wheel is determined; The result determination unit is also used for: The detection benchmark data is adjusted based on the adjustment data to obtain the adjusted detection benchmark data. Based on the adjusted detection benchmark data and the fourth difference of the detection data, it is determined that the steering wheel is in a contacted state, or that the steering wheel is in a non-contacted state.

23. A controller, characterized in that, It includes a memory and a processor; the memory stores a computer program, and the processor is used to run the computer program in the memory to perform the steering wheel contact detection method according to any one of claims 1 to 21.

24. A vehicle, characterized in that, The vehicle includes the controller of claim 23, through which it executes the steering wheel contact detection method of any one of claims 1 to 21.

25. A computer-readable storage medium, characterized in that, The computer-readable storage medium is used to store a computer program, which is loaded by a processor to perform the steering wheel contact detection method according to any one of claims 1 to 21.

26. A computer program product, characterized in that, Includes a computer program or instructions, which are loaded by a processor to perform the steering wheel contact detection method according to any one of claims 1 to 21.

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