Steering wheel hands-off detection function calibration method and electronic equipment

Abstract

The present invention discloses a method and electronic device for calibrating a steering wheel hands-off detection function. The method comprises: setting an initial threshold value based on the position of a sensing unit within a steering wheel sensing area; obtaining a first sensing signal corresponding to each test temperature based on a temperature step interval within a first preset temperature range; determining a temperature-compensated intermediate threshold value based on the initial threshold value, the first sensing signal, and the test temperature; performing different operating condition tests on different types of test objects at each test temperature within a second preset temperature range to obtain a second sensing signal; and determining a calibration threshold value based on the intermediate threshold value, the second sensing signal, and the test temperature. The present invention provides a method and electronic device for calibrating a steering wheel hands-off detection function, thereby improving the accuracy of hands-off detection and enhancing driving safety.

Description

Technical Field

[0001] The embodiments of the present invention relate to the technical field of vehicle steering wheel detection, and in particular to a steering wheel hands-off detection function calibration method and electronic equipment. Background Art

[0002] With the in-depth development and application of autonomous driving features in vehicles, the precise detection of the state of human hands during the transition between autonomous driving and human driving is crucial. Otherwise, safety accidents may occur due to system errors. Currently, the calibration of the hands-off detection function is insufficient in terms of usage environment and usage, which can easily lead to false alarms of hands-off status, causing the upper-level system to output erroneous alarm signals. Summary of the Invention

[0003] The present invention provides a steering wheel hands-off detection function calibration method and electronic equipment, which can improve the accuracy of hands-off detection and enhance driving safety.

[0004] In a first aspect, an embodiment of the present invention provides a method for calibrating a steering wheel hands-off detection function, comprising:

[0005] Setting an initial threshold value according to the position of the sensing unit in the steering wheel sensing area;

[0006] Within a first preset temperature range, obtaining a first sensing signal corresponding to each test temperature according to a temperature step interval;

[0007] determining a temperature-compensated intermediate threshold value according to the initial threshold value, the first sensing signal, and the test temperature;

[0008] Within a second preset temperature range, performing different operating condition tests on different types of test objects at each test temperature to obtain a second sensing signal;

[0009] A calibration threshold is determined according to the intermediate threshold, the second sensing signal and the test temperature.

[0010] Optionally, determining a temperature-compensated intermediate threshold according to the initial threshold, the first sensing signal, and the test temperature includes:

[0011] A temperature compensation calibration curve is obtained by plotting the test temperature and the first sensing signal;

[0012] determining temperature compensation data according to the temperature compensation calibration curve and the initial threshold;

[0013] An intermediate threshold is obtained according to the initial threshold and the temperature compensation data.

[0014] Optionally, determining a calibration threshold according to the intermediate threshold, the second sensing signal, and the test temperature includes:

[0015] determining a correction value according to the second sensing signal corresponding to the test temperature and the intermediate threshold;

[0016] The calibration threshold is determined according to the intermediate threshold and the correction value.

[0017] Optionally, the initial threshold is set according to the position of the sensing unit in the steering wheel sensing area, including:

[0018] The steering wheel includes a first surface and a second surface, wherein the first surface and the second surface are opposite surfaces; the initial thresholds of the sensing units on the first surface are the same; the initial thresholds of the sensing units on the second surface are the same; and the initial thresholds of the sensing units on the first surface are different from the initial thresholds of the sensing units on the second surface.

[0019] Optionally, after determining a temperature-compensated intermediate threshold according to the initial threshold, the first sensing signal, and the test temperature, the method further includes:

[0020] Verifying whether the intermediate threshold eliminates the influence of different test temperatures on the sensing signal; if the verification result is qualified, locking the temperature compensation data;

[0021] If it fails, the temperature compensation data is adjusted and the verification is repeated until the verification result is qualified.

[0022] Optionally, after determining the calibration threshold according to the second sensing signal and the test temperature, the method further includes:

[0023] The calibration threshold is verified according to different test object types.

[0024] Optionally, the classification conditions for the different types of test subjects include at least one of weight, age and gender of the test population.

[0025] Optionally, the first preset temperature range is -40°C to 85°C.

[0026] Optionally, the sensing unit is at least one of a capacitor unit, a pressure unit and a camera unit.

[0027] In a second aspect, an embodiment of the present invention provides 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 that can be executed by the at least one processor, and the computer program is executed by the at least one processor so that the at least one processor can perform the steering wheel hands-off detection function calibration method described in any one of the embodiments of the present invention.

[0031] The technical solution provided by the embodiment of the present invention improves the reliability of the initial threshold by setting the initial threshold according to the position of the sensing unit in the steering wheel sensing area, and uses a wider first preset temperature range to temperature compensate the sensing unit to cover the temperature usage range of all users. Compared with a single temperature calibration data, it will be more accurate. Within the second preset temperature range, it distinguishes between test objects of the same type and different working conditions, and obtains a second sensing signal by testing at each test temperature. The calibration threshold is determined using the second sensing signal, the intermediate threshold after temperature compensation, and the test temperature, thereby covering the calibration thresholds for multiple situations such as different test objects, different temperatures, and different working conditions, thereby improving the accuracy of hands-off detection and driving safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is a flow chart of a method for calibrating a steering wheel hands-off detection function provided by an embodiment of the present invention.

[0033] Figure 2 A cross-sectional schematic diagram of a steering wheel sensing area provided by an embodiment of the present invention.

[0034] Figure 3 A schematic top view of a steering wheel sensing area provided by an embodiment of the present invention.

[0035] Figure 4 This is a flowchart of another method for calibrating a steering wheel hands-off detection function provided by an embodiment of the present invention.

[0036] Figure 5 This is a flowchart of another method for calibrating a steering wheel hands-off detection function provided by an embodiment of the present invention.

[0037] Figure 6 This is a flowchart of another method for calibrating a steering wheel hands-off detection function provided by an embodiment of the present invention.

[0038] Figure 7 A schematic structural diagram of an electronic device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0039] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0040] Figure 1 This is a flowchart of a method for calibrating a hands-off steering wheel detection function provided by an embodiment of the present invention. This embodiment is applicable to the calibration of a hands-off steering wheel detection function. The method can be performed by a hands-off steering wheel detection function calibration device, which can be implemented in hardware and / or software. The method specifically includes the following steps:

[0041] S110, setting an initial threshold value according to the position of the sensing unit in the steering wheel sensing area;

[0042] Specifically, a steering wheel sensing area is set on the steering wheel according to the position that needs to be detected. For example, the steering wheel sensing area has single-zone and three-zone solutions, which can not only distinguish between touch and grip, but also distinguish between left hand or right hand, thereby improving the accuracy of judgment. Figure 2 A cross-sectional schematic diagram of a steering wheel sensing area provided by an embodiment of the present invention, Figure 3 This is a schematic diagram of a top view of a steering wheel sensing area provided by an embodiment of the present invention, see Figure 2 and Figure 3 A corresponding sensing unit 2 can be positioned beneath the leather covering 1 within the steering wheel sensing area. The sensing unit 2 is connected to a control chip 4 via a wiring harness 3. The sensing unit detects changes in the sensing signal generated by the driver's hand within the steering wheel sensing area, and the sensing signal reflects the driver's hand's touch status. When calibrating the hands-off detection function, an initial threshold is first set for the sensing unit, serving as the initial standard for subsequent sensing of the driver's hand's touch status. Because the driver's hand placement within the steering wheel sensing area varies, and the placement state varies, the initial thresholds for the sensing units within the steering wheel sensing area are determined based on their distribution. For example, in a three-zone solution, the initial thresholds for the left and right sensing units on the front of the steering wheel sensing area are set to the same, while the initial thresholds for the sensing units on the back are greater than those for the front. This setting is based on the user's grip on the steering wheel. Typically, a user's grip gesture places the thumb on the front of the steering wheel and the remaining fingers on the back. Therefore, the initial thresholds are set based on the distribution of the sensing units.

[0043] S120, obtaining a first sensing signal corresponding to each test temperature within a first preset temperature range according to a temperature step interval;

[0044] Specifically, within a first preset temperature range, the first sensing signal of the sensing unit under the influence of temperature is measured to facilitate subsequent temperature compensation. The first preset temperature range is set based on the user's operating temperature and needs to fully cover the user's operating temperature to avoid single temperature acquisition, which affects the final calibration accuracy. For example, the first preset temperature is set in a temperature range of -40°C to 85°C, with a temperature step interval of 5°C per stage, for a total of 25 stages. When measuring each temperature stage, the steering wheel needs to be left stationary for a preset time to ensure that the steering wheel reaches the specified temperature condition and ensure the accuracy of data collection.

[0045] S130, determining a temperature-compensated intermediate threshold according to the initial threshold, the first sensing signal, and the test temperature;

[0046] Specifically, under different working environment temperatures, there will be a certain error between the actual output value and the theoretical output value of the sensing unit, namely, temperature error. In order to eliminate or reduce this temperature error, temperature compensation is required. For example, through the measurement method, the first sensing signal corresponding to the test temperature is measured, and the curve relationship between the first sensing signal and the test temperature is obtained. The initial threshold is compensated according to the deviation between the first sensing signal and the initial threshold, and the compensated intermediate threshold is obtained as the trigger standard for the subsequent hand-off detection.

[0047] S140. Performing different operating condition tests on different types of test objects at each test temperature within a second preset temperature range to obtain a second sensing signal.

[0048] Specifically, the second preset temperature range is the temperature simulation range when the steering wheel is in use. For example, the second preset temperature range can be between 23°C and 75°C. The test temperature is set to 23°C → -30°C → 75°C → 40°C → 23°C in a cycle, and each temperature test is performed under the same humidity. It should be noted that the specific value of each temperature can be adjusted according to the test requirements. The test object refers to the user group. Among them, the contact area of ​​the hand holding the steering wheel of different user groups is different, so the test objects need to be classified. For example, the classification conditions can be parameters such as user age, gender and weight. In this way, each type of test object is tested. The test conditions can be divided into multiple groups of conditions such as no gloves, thin gloves, wire gloves, leather gloves, single-handed grasping and two-handed grasping in different positions according to the actual usage of the user. For example, the test process involves measuring five steering wheels at each temperature. Test subjects are categorized by weight. Each steering wheel requires grip testing for subjects weighing 46.7-51.25 kg, 68.18-86.36 kg, and >86.36 kg, respectively. Grip test conditions include no gloves, thin gloves, thread gloves, and leather gloves. Each steering wheel requires grip testing at 10 points (eight single-handed points and two double-handed points at 2 and 8 o'clock and 4 and 6 o'clock). Therefore, different test conditions can be tested at each test temperature for different test subjects to obtain a second sensing signal.

[0049] S150: Determine a calibration threshold according to the intermediate threshold, the second sensing signal, and the test temperature.

[0050] Specifically, a relationship curve is obtained based on the second sensing signal and the test temperature, wherein data indicating a gripping state when the second sensing signal is greater than an intermediate threshold value is obtained. If, under the corresponding gripping operating condition, the detected second sensing signal does not reflect the corresponding gripping state, the intermediate threshold value is compensated based on the second sensing signal to ultimately determine the calibration threshold value. For example, for example, the intermediate threshold value at 23°C is 100, and the second sensing signal measured for a person weighing 46.7-51.25 kg without gloves is 90. The intermediate threshold value corresponding to the population and temperature under this operating condition is then adjusted to determine the calibration threshold value. For example, the second sensing signal corresponding to the population and temperature under this operating condition can also be compensated to ensure that the second sensing signal reaches the calibration threshold value.

[0051] The technical solution provided by the embodiment of the present invention improves the reliability of the initial threshold by setting the initial threshold according to the position of the sensing unit in the steering wheel sensing area, and uses a wider first preset temperature range to temperature compensate the sensing unit to cover the temperature usage range of all users. Compared with a single temperature calibration data, it will be more accurate. Within the second preset temperature range, it distinguishes between test objects of the same type and different working conditions, and obtains a second sensing signal by testing at each test temperature. The calibration threshold is determined using the second sensing signal, the intermediate threshold after temperature compensation, and the test temperature, thereby covering the calibration thresholds for multiple situations such as different test objects, different temperatures, and different working conditions, thereby improving the accuracy of hands-off detection and driving safety.

[0052] Optionally, determining a temperature-compensated intermediate threshold value according to the initial threshold value, the first sensing signal, and the test temperature includes:

[0053] A temperature compensation calibration curve is obtained by plotting the test temperature and the first sensing signal;

[0054] Determine temperature compensation data according to the temperature compensation calibration curve and the initial threshold value;

[0055] The intermediate threshold is obtained based on the initial threshold and the temperature compensation data.

[0056] Specifically, the test temperature and the first sensing signal are combined to obtain a temperature compensation calibration curve. The deviation between the first sensing signal and the initial threshold calibration for each test temperature is determined based on the temperature compensation calibration curve, i.e., the temperature compensation data. For example, if the initial threshold is 50 and the first sensing signal measured at -40°C is 40, the temperature compensation data obtained is 10. The initial threshold is readjusted based on the temperature compensation data to determine the intermediate threshold corresponding to each temperature.

[0057] Optionally, determining the calibration threshold according to the intermediate threshold, the second sensing signal, and the test temperature includes:

[0058] determining a correction value according to a second sensing signal corresponding to the test temperature and an intermediate threshold;

[0059] The calibration threshold is determined based on the intermediate threshold and the correction value.

[0060] Specifically, a relationship curve is obtained based on the second sensing signal and the test temperature, wherein data indicating a second sensing signal greater than an intermediate threshold indicates a gripping state. If, under the corresponding gripping condition, the detected second sensing signal cannot reflect the corresponding gripping state, a correction value is determined based on the second sensing signal to compensate for the intermediate threshold, ultimately determining the calibration threshold. For example, if the intermediate threshold at 23°C is 100, and the second sensing signal measured for a person weighing 46.7-51.25 kg without gloves is 90, a correction value is determined based on the second sensing signal and the intermediate threshold, and the intermediate threshold is corrected using the correction value. For example, the sensing signal can also be corrected based on the correction value so that the measured sensing signal can correctly reflect the hand-off detection condition based on the intermediate threshold. In this case, the intermediate threshold is the calibration threshold.

[0061] Optionally, the initial threshold is set according to the position of the sensing unit in the steering wheel sensing area, including:

[0062] The steering wheel includes a first surface and a second surface, wherein the first surface and the second surface are opposite surfaces; the initial thresholds of the sensing units on the first surface are the same; the initial thresholds of the sensing units on the second surface are the same; the initial thresholds of the sensing units on the first surface are different from the initial thresholds of the sensing units on the second surface.

[0063] Specifically, the opposite surface of the steering wheel is the front surface facing the user, and the opposite surface is the back surface. Exemplarily, the first surface is the front surface, and the second surface is the back surface. Corresponding sensing units can be positioned beneath the leather covering the steering wheel within the steering wheel sensing area. The sensing units detect changes in the sensing signal generated by the driver's hand within the steering wheel sensing area, and the sensing signal is used to reflect the touch state of the driver's hand. When calibrating the hands-off detection function, an initial threshold is first set for the sensing units, which serves as the initial standard for subsequent sensing of the driver's hand touch state. Because the driver's hand placement within the steering wheel sensing area is not unique, and the placement state is also different, the initial thresholds of the sensing units within the steering wheel sensing area are set based on the distribution of the sensing units. Exemplarily, in a three-zone solution, the initial thresholds for the left and right sensing units within the steering wheel sensing area are set to be the same, while the initial thresholds for the sensing units on the back are greater than those for the front sensing units. This setting is based on the user's grip on the steering wheel. A typical user grip gesture is with the thumb on the front of the steering wheel and the remaining fingers on the back of the steering wheel. Therefore, the initial thresholds are set based on the distribution of the sensing units.

[0064] Figure 4 This is a flow chart of another method for calibrating the steering wheel hands-off detection function provided by an embodiment of the present invention, see Figure 4 , the method steps include:

[0065] S210, setting an initial threshold value according to the position of the sensing unit in the steering wheel sensing area;

[0066] S220: Acquire a first sensing signal corresponding to each test temperature within a first preset temperature range according to a temperature step interval;

[0067] S230, determining a temperature-compensated intermediate threshold according to the initial threshold, the first sensing signal, and the test temperature;

[0068] S240, verify whether the intermediate threshold eliminates the influence of different test temperatures on the sensing signal; if the verification result is qualified, lock the temperature compensation data; if not, adjust the temperature compensation data and repeat the verification until the verification result is qualified.

[0069] Specifically, a temperature compensation verification test is performed based on the corresponding intermediate threshold value at each supplemented temperature point to verify whether the temperature compensation data can eliminate the impact of different temperatures on capacitive sensing. If the verification result is qualified, the temperature compensation data is locked. If it is unqualified, the temperature compensation data is adjusted to adjust the intermediate threshold value. The verification test is then repeated until different test temperatures have no effect on the sensing signal or the impact value is within the normal range.

[0070] S250, performing different operating condition tests on different types of test objects at each test temperature within a second preset temperature range to obtain a second sensing signal;

[0071] S260: Determine a calibration threshold according to the intermediate threshold, the second sensing signal, and the test temperature.

[0072] Figure 5 This is a flow chart of another method for calibrating the steering wheel hands-off detection function provided by an embodiment of the present invention, see Figure 5 , the method steps include:

[0073] S310, setting an initial threshold value according to the position of the sensing unit in the steering wheel sensing area;

[0074] S320: acquiring a first sensing signal corresponding to each test temperature within a first preset temperature range according to a temperature step interval;

[0075] S330, determining a temperature-compensated intermediate threshold according to the initial threshold, the first sensing signal, and the test temperature;

[0076] S340, verify whether the intermediate threshold eliminates the influence of different test temperatures on the sensing signal; if the verification result is qualified, lock the temperature compensation data; if not, adjust the temperature compensation data and repeat the verification until the verification result is qualified.

[0077] S350, performing different operating condition tests on different types of test objects at each test temperature within a second preset temperature range to obtain a second sensing signal;

[0078] S360: Determine a calibration threshold according to the intermediate threshold, the second sensing signal, and the test temperature.

[0079] S370: Verify the calibration threshold according to different test object types.

[0080] Specifically, the calibration threshold is input into the steering wheel control chip, and verification of the user's accidental contact with the steering wheel (knee, water bottle) is included in the verification process. The purpose is to verify the validity, accuracy, and anti-accidental touch performance of the calibration results, while also verifying the reliability of the hardware in the control chip. If the test results are qualified, the calibration is completed and the calibration threshold is determined. Otherwise, the calibration threshold needs to be further adjusted and written to the control chip. Then, environmental verification tests and water spray tests are performed again until the test results are qualified and the calibration threshold is determined.

[0081] Figure 6 This is a flow chart of another method for calibrating the steering wheel hands-off detection function provided by an embodiment of the present invention, see Figure 6 , the method steps include:

[0082] Calibration begins at step S410, where the sensing unit sets an initial threshold. Step S420: Temperature compensation is performed on the sensing unit. Within a first preset temperature range, the first sensing signal corresponding to each test temperature is obtained based on the temperature step interval. Step S430: The compensated intermediate threshold is determined and written to the steering wheel control chip. Step S440: Verify whether the intermediate threshold eliminates the effect of different test temperatures on the sensing signal. Step S450: If the verification result is satisfactory, the temperature compensation data is locked and written to the control chip. Step S460: If the verification result is unsatisfactory, the temperature compensation data is adjusted and the verification is repeated until the verification result is satisfactory. Step S470: Environmental data is collected. Within a second preset temperature range, different types of test objects are tested under different operating conditions at each test temperature to obtain a second sensing signal. Step S480: A water spray test is performed to verify hardware reliability. Step S490: The calibration threshold is determined based on the intermediate threshold, the second sensing signal, and the test temperature, and written to the control chip. Step S500: The calibration threshold is verified, including water spray verification and false touch verification. The purpose is to verify the validity, accuracy, and false touch prevention performance of the calibration results, as well as the reliability of the hardware in the control chip. If the test result is qualified, then S510, calibration is completed and the calibration threshold is determined. Otherwise, S520 needs to continue to adjust the calibration threshold and write it to the control chip, and then perform environmental verification test and water spray test again until the test result is qualified and the calibration threshold is determined.

[0083] Optionally, the classification conditions for different types of test subjects include at least one of the weight, age and gender of the test population. Specifically, in order to ensure that the test subjects cover a wide range of data, the classification of user populations can be completed based on any one or more conditions. Exemplarily, in an embodiment of the present invention, user populations are differentiated according to weight, such as people with a weight of 46.7-51.25 kg, people with a weight of 68.18-86.36 kg, and people with a weight greater than 86.36 kg. Different weights can reflect the contact area between the palm and the steering wheel sensing area, thereby meeting the needs of test subject classification.

[0084] Optionally, the first preset temperature range is -40°C to 85°C. Specifically, the sensing unit is temperature compensated, wherein the first preset temperature range set by the temperature compensation is wider than the single temperature calibration, covering the temperature range of -40°C to 85°C, which can fully cover the temperature usage range of all users.

[0085] Optionally, the sensing unit is at least one of a capacitor unit, a pressure unit and a camera unit.

[0086] Specifically, according to the type of sensing unit, the corresponding measurement of the first sensing signal and the second sensing signal can determine the calibration threshold of the sensing unit according to the calibration method of any embodiment of the present invention, thereby being applicable to hand-off detection methods such as camera unit image recognition, steering wheel capacitance unit sensing, and pressure unit monitoring.

[0087] An embodiment of the present invention further provides an electronic device, the electronic device comprising:

[0088] at least one processor; and

[0089] a memory communicatively connected to at least one processor; wherein,

[0090] The memory stores a computer program that can be executed by at least one processor. The computer program is executed by the at least one processor so that the at least one processor can execute any steering wheel hand-off detection function calibration method of the embodiment of the present invention.

[0091] Figure 7 A schematic diagram of the structure of an electronic device provided for an embodiment of the present invention. 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 may also represent various forms of mobile devices, such as personal digital processing, cellular phones, smart phones, wearable devices (such as helmets, glasses, watches, etc.) and other similar computing devices. The components shown herein, their connections and relationships, and their functions are merely examples and are not intended to limit the implementation of the present invention described and / or required herein.

[0092] like Figure 7 As shown, the electronic device 10 includes at least one processor 11 and a memory, such as a read-only memory (ROM) 12, a random access memory (RAM) 13, etc., which is communicatively connected to the at least one processor 11. The memory stores a computer program that can be executed by the at least one processor. The processor 11 can perform various appropriate actions and processes according to the computer program stored in the read-only memory (ROM) 12 or the computer program loaded from the storage unit 18 into the random access memory (RAM) 13. Various programs and data required for the operation of the electronic device 10 can also be stored in the RAM 13. The processor 11, ROM 12, and RAM 13 are connected to each other via a bus 14. An input / output (I / O) interface 15 is also connected to the bus 14.

[0093] Multiple components in the electronic device 10 are connected to the I / O interface 15, including an input unit 16, such as a keyboard, a mouse, etc.; an output unit 17, such as various types of displays, speakers, etc.; a storage unit 18, such as a magnetic disk, an optical disk, etc.; and a communication unit 19, such as a network card, a modem, a wireless communication transceiver, etc. The communication unit 19 allows the electronic device 10 to exchange information / data with other devices via a computer network such as the Internet and / or various telecommunication networks.

[0094] The processor 11 may be any general-purpose and / or specialized processing component with processing and computing capabilities. Some examples of the processor 11 include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various specialized artificial intelligence (AI) computing chips, various processors running machine learning model algorithms, a digital signal processor (DSP), and any appropriate processor, controller, microcontroller, etc. The processor 11 executes the various methods and processes described above.

[0095] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A method for calibrating a hands-off steering wheel detection function, characterized in that: include: Setting an initial threshold value according to the position of the sensing unit in the steering wheel sensing area; Within a first preset temperature range, obtaining a first sensing signal corresponding to each test temperature according to a temperature step interval; determining a temperature-compensated intermediate threshold value according to the initial threshold value, the first sensing signal, and the test temperature; Within a second preset temperature range, different types of test subjects are tested under different operating conditions at each test temperature to obtain second sensing signals; the second preset temperature range is a temperature simulation range when the steering wheel is in use; the classification conditions for the different types of test subjects include at least one of weight, age, and gender of the test population; A calibration threshold is determined according to the intermediate threshold, the second sensing signal and the test temperature.

2. The method for calibrating the hands-off steering wheel detection function according to claim 1, characterized in that: Determining a temperature-compensated intermediate threshold according to the initial threshold, the first sensing signal, and the test temperature includes: A temperature compensation calibration curve is obtained by plotting the test temperature and the first sensing signal; determining temperature compensation data according to the temperature compensation calibration curve and the initial threshold; An intermediate threshold is obtained according to the initial threshold and the temperature compensation data.

3. The method for calibrating the hands-off steering wheel detection function according to claim 1, wherein: Determining a calibration threshold according to the intermediate threshold, the second sensing signal, and the test temperature includes: determining a correction value according to the second sensing signal corresponding to the test temperature and the intermediate threshold; The calibration threshold is determined according to the intermediate threshold and the correction value.

4. The method for calibrating the hands-off steering wheel detection function according to claim 1, characterized in that: The initial threshold is set according to the position of the sensing unit in the steering wheel sensing area, including: The steering wheel includes a first surface and a second surface, wherein the first surface and the second surface are opposite surfaces; the initial thresholds of the sensing units on the first surface are the same; the initial thresholds of the sensing units on the second surface are the same; and the initial thresholds of the sensing units on the first surface are different from the initial thresholds of the sensing units on the second surface.

5. The method for calibrating the hands-off steering wheel detection function according to claim 2, characterized in that: After determining the temperature-compensated intermediate threshold according to the initial threshold, the first sensing signal, and the test temperature, the method further includes: Verifying whether the intermediate threshold eliminates the influence of different test temperatures on the sensing signal; if the verification result is qualified, locking the temperature compensation data; If it fails, the temperature compensation data is adjusted and the verification is repeated until the verification result is qualified.

6. The method for calibrating the hands-off steering wheel detection function according to claim 1, characterized in that: After determining the calibration threshold according to the second sensing signal and the test temperature, the method further includes: The calibration threshold is verified according to different test object types.

7. The method for calibrating a hands-off steering wheel detection function according to any one of claims 1 to 6, characterized in that: The first preset temperature range is -40°C to 85°C.

8. The method for calibrating a hands-off steering wheel detection function according to any one of claims 1 to 6, characterized in that: The sensing unit is at least one of a capacitor unit, a pressure unit and a camera unit.

9. An electronic device, characterized in that: The electronic device comprises: at least one processor; and a memory communicatively connected to the at least one processor; wherein, 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 so that the at least one processor can execute the steering wheel hands-off detection function calibration method according to any one of claims 1 to 8.

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