CN115752543A - Method for calibrating steering wheel hands-off detection function and electronic equipment - Google Patents
Method for calibrating steering wheel hands-off detection function and electronic equipment Download PDFInfo
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Abstract
The invention discloses a method for calibrating a steering wheel hands-off detection function and electronic equipment. The method comprises the following steps: setting an initial threshold value according to the position of a sensing unit in a steering wheel sensing area; within a first preset temperature range, acquiring a first induction signal corresponding to each test temperature according to the temperature step interval; determining a middle threshold value after temperature compensation according to the initial threshold value, the first induction signal and the test temperature; in a second preset temperature range, testing different working conditions of different types of test objects at each test temperature to obtain a second induction signal; and determining a calibration threshold value according to the intermediate threshold value, the second induction signal and the test temperature. The invention provides a method for calibrating a steering wheel hands-off detection function and electronic equipment, which are used for improving the precision of hands-off detection and improving driving safety.
Description
Technical Field
The embodiment of the invention relates to the technical field of vehicle steering wheel detection, in particular to a method for calibrating a steering wheel hands-off detection function and electronic equipment.
Background
With the deep development and application of the automatic driving function of the automobile, the state of human hands in the process of switching between automatic driving and human driving needs to be accurately detected, otherwise, safety accidents can be caused by system detection errors. At present, the steering wheel leaves the hand detection function in the service environment, the calibration on the service condition is insufficient, the error alarm of the hand-leaving state is easy to generate, and the upper system outputs wrong alarm signals.
Disclosure of Invention
The invention provides a method for calibrating a steering wheel hands-off detection function and electronic equipment, which are used for improving the precision of hands-off detection and improving the driving safety.
In a first aspect, an embodiment of the present invention provides a method for calibrating a function of detecting a steering wheel out of hand, including:
setting an initial threshold value according to the position of an induction unit in an induction area of a steering wheel;
within a first preset temperature range, acquiring a first induction signal corresponding to each test temperature according to the temperature step interval;
determining a middle threshold value after temperature compensation according to the initial threshold value, the first induction signal and the test temperature;
in a second preset temperature range, testing different working conditions of different types of test objects at each test temperature to obtain a second induction signal;
and determining a calibration threshold value according to the intermediate threshold value, the second induction signal and the test temperature.
Optionally, determining a temperature-compensated intermediate threshold according to the initial threshold, the first sensing signal and the test temperature includes:
drawing a temperature compensation calibration curve according to the test temperature and the first induction signal;
determining temperature compensation data according to the temperature compensation calibration curve and the initial threshold;
and obtaining an intermediate threshold value according to the initial threshold value and the temperature compensation data.
Optionally, 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 induction signal corresponding to the test temperature and the intermediate threshold value;
and determining the calibration threshold value according to the intermediate threshold value and the correction value.
Optionally, the setting of the initial threshold according to the position of the sensing unit in the sensing area of the steering wheel includes:
the steering wheel includes a first surface and a second surface, wherein the first surface and the second surface are opposing surfaces; the initial threshold values of the sensing units on the first surface are the same; the initial threshold values of the sensing units on the second surface are the same; the initial threshold value of the sensing element on the first surface is different from the initial threshold value of the sensing element on the second surface.
Optionally, after determining the intermediate temperature-compensated 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 induction signal; if the verification result is qualified, locking the temperature compensation data;
and if the temperature compensation data is not qualified, adjusting the temperature compensation data, and repeatedly verifying until the verification result is qualified.
Optionally, after determining a calibration threshold according to the second sensing signal and the test temperature, the method further includes:
and verifying the calibration threshold according to different test object types.
Optionally, the classification condition of the different types of test subjects includes at least one of weight, age, and gender of the test population.
Optionally, the first preset temperature range is-40 ℃ to 85 ℃.
Optionally, the sensing unit is at least one of a capacitance unit, a pressure unit and a camera unit.
In a second aspect, an embodiment of the present invention provides an electronic device, where the electronic device includes:
at least one processor; and
a memory communicatively coupled to the at least one processor; wherein,
the memory stores a computer program executable by the at least one processor, the computer program being executed by the at least one processor to enable the at least one processor to perform the method for calibrating a steering wheel hands-off detection function according to any of the embodiments of the present invention.
According to the technical scheme provided by the embodiment of the invention, the reliability of the initial threshold is improved by setting the initial threshold according to the position of the sensing unit in the sensing area of the steering wheel, the wider first preset temperature range is used for carrying out temperature compensation on the sensing unit, the use range of all user temperatures is covered, the calibration data is more accurate compared with single temperature, the same type of test objects and different working conditions are distinguished in the second preset temperature range, a second sensing signal is obtained by testing at each test temperature, and the calibration threshold is determined by using the second sensing signal, the middle threshold after temperature compensation and the test temperature, so that the calibration thresholds of different test objects, different temperatures, different working conditions and the like are covered, the accuracy of off-hand detection is improved, and the driving safety is improved.
Drawings
Fig. 1 is a flowchart of a method for calibrating a steering wheel hands-off detection function according to an embodiment of the present invention.
Fig. 2 is a schematic cross-sectional view of a steering wheel sensing area according to an embodiment of the present invention.
Fig. 3 is a schematic top view of a steering wheel sensing area according to an embodiment of the present invention.
Fig. 4 is a flowchart of another method for calibrating a steering wheel hands-off detection function according to an embodiment of the present invention.
Fig. 5 is a flowchart of another method for calibrating a steering wheel hands-off detection function according to an embodiment of the present invention.
Fig. 6 is a flowchart of another method for calibrating a steering wheel hands-off detection function according to an embodiment of the present invention.
Fig. 7 is a schematic structural diagram of an electronic device according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without inventive step based on the embodiments of the present invention, are within the scope of protection of the present invention.
Fig. 1 is a flowchart of a method for calibrating a steering wheel hands-off detection function according to an embodiment of the present invention, where the embodiment is applicable to a situation of calibrating a steering wheel hands-off detection function, and the method can be executed by a device for calibrating a steering wheel hands-off detection function, where the device can be implemented in a hardware and/or software manner. The method specifically comprises the following steps:
s110, setting an initial threshold value according to the position of a sensing unit in a steering wheel sensing area;
the position that detects as required sets up the steering wheel induction zone on the steering wheel, and is exemplary, and the steering wheel induction zone has single district and three district's schemes, not only can distinguish the touching and tightly hold, can also distinguish left hand or right hand, has promoted the rate of accuracy of judgement. Fig. 2 is a schematic cross-sectional view of a steering wheel sensing area according to an embodiment of the present invention, fig. 3 is a schematic top view of the steering wheel sensing area according to the embodiment of the present invention, referring to fig. 2 and fig. 3, a sensing unit 2 may be disposed under a leather 1 covering a steering wheel in the steering wheel sensing area, and the sensing unit 2 is connected to a control chip 4 through a wire harness 3. The sensing unit detects the sensing signal change of the hand of the driver in the sensing area of the steering wheel, and the sensing signal reflects the touch state of the hand of the driver. When the function of detecting the hands are separated from the hands is calibrated, an initial threshold value is set for the sensing unit firstly, the initial threshold value is used as an initial standard of touch state sensing of subsequent driver hands, the positions of the driver hands placed in the steering wheel sensing area are not unique, and the placing states are different, so that the initial threshold value of the sensing unit in the steering wheel sensing area is set according to the distribution positions of the sensing unit. The setting is made according to the characteristic that a user grasps the steering wheel, the grasping gesture of the user is generally that the thumb is arranged on the front side of the steering wheel, and the other fingers are arranged on the back side of the steering wheel, so that the initial threshold value is set according to the distribution position of the sensing unit.
S120, acquiring a first induction signal corresponding to each test temperature according to the temperature step interval within a first preset temperature range;
specifically, in a first preset temperature range, a first sensing signal of the sensing unit under the influence of temperature is measured, so that subsequent temperature compensation is facilitated, wherein the first preset temperature range is set according to the use temperature of a user, the use temperature of the user needs to be covered comprehensively, single temperature collection is avoided, and the final calibration accuracy is influenced. Illustratively, the first preset temperature is set in a temperature range of-40 ℃ to 85 ℃, the temperature step interval is one stage every 5 ℃, and the total number of the stages is 25, and when each temperature stage is measured, the steering wheel needs to be kept still for a preset time, so that the steering wheel is ensured to reach the temperature condition, and the accuracy of data acquisition is ensured.
S130, determining a middle threshold value after temperature compensation according to the initial threshold value, the first induction signal and the test temperature;
specifically, the sensing unit may have a certain error between the actual output value and the theoretical output value at different operating environment temperatures, that is, a temperature error, and in order to eliminate or reduce the temperature error, temperature compensation is required.
S140, in a second preset temperature range, different working condition tests are carried out on different types of test objects at each test temperature to obtain second induction signals;
specifically, the second preset temperature range is a temperature simulation range when the steering wheel is used, and for example, the second preset temperature range may be 23 ℃ to 75 ℃, the test temperature is set to 23 ℃→ -30 ℃→ 75 → 40 → 23 ℃ for one cycle, and the test of each temperature is performed at the same humidity, and it should be noted that specific values of each temperature may be adjusted according to test requirements. The test object refers to a user group, wherein the contact areas of the hands holding the steering wheel are different from user group to user group, so that the test object is required to be classified, and the classification condition can be parameters such as age, sex and weight of the user. Thereby testing each class of test object. The working conditions of the test can be divided into a plurality of groups of working conditions such as no wearing of gloves, wearing of thin gloves, wearing of linear gloves, wearing of leather gloves, one-hand grasping, two-hand grasping at different positions and the like according to the actual use condition of a user. Exemplary, test procedure: 5 groups of steering wheels are measured at each temperature, and test objects are classified by weight, wherein each steering wheel needs to be subjected to gripping steering wheel tests by a crowd weighing 46.7-51.25kg, a crowd weighing 68.18-86.36kg and a crowd weighing more than 86.36kg respectively, the gripping test conditions comprise that gloves are not worn, thin gloves are worn, line gloves are worn and leather gloves are worn, and each steering wheel needs to be tested and gripped at 10 points (8 single-hand points and 2 double-hand points <2, 8 o 'clock &4 and 6 o' clock >). Therefore, different working condition tests can be carried out on different types of test objects at each test temperature to obtain the second induction signal.
And S150, determining a calibration threshold according to the intermediate threshold, the second sensing signal and the test temperature.
Specifically, a relation curve is obtained according to the second sensing signal and the test temperature, wherein data of the second sensing signal larger than the intermediate threshold is a gripping state, if the detected second sensing signal does not reflect the corresponding gripping state under the corresponding gripping condition, the intermediate threshold is compensated according to the second sensing signal, and finally a calibration threshold is determined, for example, when the intermediate threshold at 23 ℃ is 100, and the measured second sensing signal of a person who does not wear gloves is 90, the intermediate threshold of the person who corresponds to the condition and the temperature under the condition is adjusted, and the calibration threshold is determined. In an exemplary embodiment, the second sensing signal of the crowd and the temperature corresponding to the working condition may be compensated, so that the second sensing signal reaches the calibration threshold.
According to the technical scheme provided by the embodiment of the invention, the reliability of the initial threshold value is improved by setting the initial threshold value according to the position of the sensing unit in the sensing area of the steering wheel, the sensing unit is subjected to temperature compensation by utilizing a wider first preset temperature range, the use range of all user temperatures is covered, compared with single temperature calibration data, the reliability of the initial threshold value is more accurate, the same type of test objects and different working conditions are distinguished in a second preset temperature range, a second sensing signal is obtained by testing at each test temperature, and the calibration threshold value is determined by utilizing the second sensing signal, the intermediate threshold value after temperature compensation and the test temperature, so that the calibration threshold values of different test objects, different temperatures, different working conditions and other situations are covered, the precision of off-hand detection is improved, and the driving safety is improved.
Optionally, determining the intermediate threshold after temperature compensation according to the initial threshold, the first sensing signal and the test temperature includes:
drawing a temperature compensation calibration curve according to the test temperature and the first induction signal;
determining temperature compensation data according to the temperature compensation calibration curve and the initial threshold;
an intermediate threshold is obtained based on the initial threshold and the temperature compensation data.
Specifically, the test temperature and the first sensing signal are summarized to obtain a temperature compensation calibration curve, and a deviation value between the first sensing signal of each test temperature and the initial threshold calibration is determined according to the temperature compensation calibration curve, that is, temperature compensation data, for example, the initial threshold is 50, and if the first sensing signal is measured at-40 ℃, the temperature compensation data is 10, the first sensing signal is 40. The initial threshold is readjusted based on the temperature compensation data so that an intermediate threshold corresponding to each temperature can be determined.
Optionally, 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 induction signal corresponding to the test temperature and the intermediate threshold value;
and determining a calibration threshold value according to the intermediate threshold value and the correction value.
Specifically, a relation curve is obtained according to a second sensing signal and the test temperature, wherein data that the second sensing signal is greater than the intermediate threshold value is a gripping state, if the detected second sensing signal cannot reflect the corresponding gripping state under the corresponding gripping condition, a correction value is determined according to the second sensing signal to compensate the intermediate threshold value, and finally a calibration threshold value is determined, for example, when the intermediate threshold value is 100 at 23 ℃, and a second sensing signal that 46.7-51.25kg of people do not wear gloves is measured to be 90, the correction value is determined according to the second sensing signal and the intermediate threshold value, and the intermediate threshold value is corrected by using the correction value. For example, the sensing signal may be corrected according to the correction value, so that the measured sensing signal may correctly reflect the hands-off detection condition according to the intermediate threshold, and the intermediate threshold at this time is the calibration threshold.
Optionally, the setting of the initial threshold according to the position of the sensing unit in the sensing area of the steering wheel includes:
the steering wheel comprises a first surface and a second surface, wherein the first surface and the second surface are opposite surfaces; the initial threshold values of the sensing units on the first surface are the same; the initial threshold values of the sensing units on the second surface are the same; the initial threshold value of the sensing elements on the first surface is different from the initial threshold value of the sensing elements on the second surface.
Specifically, the opposite surface of the steering wheel is a front surface facing the user, and the opposite surface is a back surface. Illustratively, the first surface is a front surface, the second surface is a back surface, a corresponding sensing unit may be disposed under leather covering the steering wheel in the sensing area of the steering wheel, the sensing unit detects a change of a sensing signal of the driver's hand in the sensing area of the steering wheel, and the sensing signal reflects a touch state of the driver's hand. When the function of detecting the hands are separated from the hands is calibrated, an initial threshold value is set for the sensing unit firstly, the initial threshold value is used as an initial standard of touch state sensing of subsequent driver hands, the positions of the driver hands placed in the steering wheel sensing area are not unique, and the placing states are different, so that the initial threshold value of the sensing unit in the steering wheel sensing area is set according to the distribution positions of the sensing unit. The setting is made according to the characteristic that a user grasps the steering wheel, the grasping gesture of the user is generally that the thumb is arranged on the front side of the steering wheel, and the other fingers are arranged on the back side of the steering wheel, so that the initial threshold value is set according to the distribution position of the sensing unit.
Fig. 3 is a flowchart of another method for calibrating a steering wheel hands-off detection function according to an embodiment of the present invention, and referring to fig. 3, the method includes the steps of:
s210, setting an initial threshold value according to the position of an induction unit in a steering wheel induction area;
s220, acquiring a first induction signal corresponding to each test temperature according to the temperature step interval within a first preset temperature range;
s230, determining a middle threshold value after temperature compensation according to the initial threshold value, the first induction signal and the test temperature;
s240, verifying whether the middle threshold eliminates the influence of different test temperatures on the induction signal; if the verification result is qualified, locking the temperature compensation data; and if the temperature compensation data is not qualified, adjusting the temperature compensation data, and repeatedly verifying until the verification result is qualified.
Specifically, a temperature compensation verification test is performed according to the corresponding intermediate threshold of each temperature point after the compensation, so as to verify whether the temperature compensation data can eliminate the influence of different temperatures on the capacitance sensing. If the verification result is qualified, locking the temperature compensation data, if the verification result is unqualified, adjusting the temperature compensation data to further realize the adjustment of the intermediate threshold, and then repeating the verification test until different test temperatures have no influence on the sensing signal or the influence quantity value is within a normal range interval.
S250, in a second preset temperature range, testing different working conditions of different types of test objects at each test temperature to obtain a second induction signal;
and S260, determining a calibration threshold according to the intermediate threshold, the second sensing signal and the test temperature.
Fig. 4 is a flowchart of another method for calibrating a steering wheel hands-off detection function according to an embodiment of the present invention, and referring to fig. 4, the method includes:
s310, setting an initial threshold value according to the position of a sensing unit in a steering wheel sensing area;
s320, acquiring a first induction signal corresponding to each test temperature according to the temperature step interval in a first preset temperature range;
s330, determining a middle threshold value after temperature compensation according to the initial threshold value, the first sensing signal and the test temperature;
s340, verifying whether the intermediate threshold eliminates the influence of different test temperatures on the induction signal; if the verification result is qualified, locking the temperature compensation data; and if the temperature compensation data is not qualified, adjusting the temperature compensation data, and repeatedly verifying until the verification result is qualified.
S350, in a second preset temperature range, testing different working conditions of different types of test objects at each test temperature to obtain a second induction signal;
and S360, determining a calibration threshold value according to the intermediate threshold value, the second induction signal and the test temperature.
And S370, verifying the calibration threshold according to different test object types.
Specifically, a calibration threshold value is input into a control chip of a steering wheel, verification of the condition that a user mistakenly touches the steering wheel (knee and water bottle) is added in verification, the purpose is to verify the validity and accuracy of a calibration result and the performance of mistakenly touching, and meanwhile, the reliability of hardware in the control chip is verified. And if the test result is qualified, finishing calibration and determining a calibration threshold value. Otherwise, continuously adjusting the calibration threshold value and writing the calibration threshold value into the control chip, then performing the environment verification test and the water spraying test again until the test result is qualified, and determining the calibration threshold value.
Fig. 5 is a flowchart of another method for calibrating a steering wheel hands-off detection function according to an embodiment of the present invention, and referring to fig. 5, the method includes:
and S410, setting an initial threshold value by the sensing unit. S420, temperature compensation is carried out on the sensing units, a first sensing signal corresponding to each testing temperature is obtained according to temperature step intervals within a first preset temperature range, S430, a compensated middle threshold value is determined, a control chip of a steering wheel is written, S440, whether the middle threshold value eliminates the influence of different testing temperatures on the sensing signals is verified, and if the verification result is qualified, temperature compensation data are locked and written into the control chip is verified; and S460, if the temperature compensation data is not qualified, adjusting the temperature compensation data, and repeatedly verifying until the verification result is qualified. And S470, acquiring environmental data, testing different working conditions of different types of test objects at each test temperature within a second preset temperature range to obtain a second induction signal, S480, verifying the reliability of hardware by setting a water spraying test, and S490, determining a calibration threshold according to the intermediate threshold, the second induction signal and the test temperature, and writing the calibration threshold into a control chip. S500, verifying the calibration threshold, and simultaneously adding water spraying verification and false touch verification, so as to verify the validity, accuracy and false touch prevention performance of the calibration result and verify the reliability of hardware in the control chip. And if the test result is qualified, S510, finishing calibration and determining a calibration threshold value. Otherwise, S520, the calibration threshold needs to be continuously adjusted and written into the control chip, and then the environment verification test and the water spraying test are carried out again until the test result is qualified, and the calibration threshold is determined.
Optionally, the classification condition for the different types of test subjects includes at least one of weight, age, and gender of the test population. Specifically, in order to ensure that the test object covers a wide range of data, the user population classification can be completed according to any one or more conditions. Illustratively, according to the embodiment of the invention, user groups are distinguished according to weights, for example, 46.7-51.25kg of user groups, 68.18-86.36kg of user groups and more than 86.36kg of user groups, and different weights can reflect the contact area of a palm and a steering wheel sensing area, so that the requirement of test object classification is met.
Optionally, the first preset temperature range is-40 ℃ to 85 ℃. Specifically, the temperature compensation is performed on the sensing unit, wherein the first preset temperature range set by the temperature compensation is wider than that of single temperature calibration, covers a temperature range of-40 ℃ to 85 ℃, and can completely cover the temperature use range of all users
Optionally, the sensing unit is at least one of a capacitance unit, a pressure unit and a camera unit.
Specifically, according to the type of the sensing unit, the first sensing signal and the second sensing signal are correspondingly measured, and the calibration threshold of the sensing unit can be determined according to the calibration method of any embodiment of the invention, so that the method is suitable for hands-off detection in modes of image recognition of a camera unit, capacitance unit sensing of a steering wheel, pressure unit monitoring and the like.
An embodiment of the present invention further provides an electronic device, where the electronic device includes:
at least one processor; and
a memory communicatively coupled to the at least one processor; wherein,
the memory stores a computer program executable by the at least one processor, the computer program being executable by the at least one processor to enable the at least one processor to perform a method of steering wheel hands-off detection function calibration according to any of the embodiments of the present invention.
Fig. 6 is a schematic structural diagram of an electronic device according to an embodiment of the present invention. Electronic devices are intended to represent various forms of digital computers, such as laptops, desktops, workstations, personal digital assistants, servers, blade servers, mainframes, and other appropriate computers. The electronic device may also represent various forms of mobile devices, such as personal digital assistants, cellular phones, smart phones, wearable devices (e.g., helmets, glasses, watches, etc.), and other similar computing devices. The components shown herein, their connections and relationships, and their functions, are meant to be exemplary only, and are not meant to limit implementations of the inventions described and/or claimed herein.
As shown in fig. 6, the electronic device 10 includes at least one processor 11, and a memory communicatively connected to the at least one processor 11, such as a Read Only Memory (ROM) 12, a Random Access Memory (RAM) 13, and the like, wherein the memory stores a computer program executable by the at least one processor, and the processor 11 can perform various suitable actions and processes according to the computer program stored in the Read Only Memory (ROM) 12 or the computer program loaded from a storage unit 18 into the Random Access Memory (RAM) 13. In the RAM 13, various programs and data necessary for the operation of the electronic apparatus 10 can also be stored. The processor 11, the ROM 12, and the 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.
A number of 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, or the like; an output unit 17 such as various types of displays, speakers, and the like; a storage unit 18 such as a magnetic disk, an optical disk, or the like; and a communication unit 19 such as a network card, modem, 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.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A method for calibrating a steering wheel hands-off detection function is characterized by comprising the following steps:
setting an initial threshold value according to the position of a sensing unit in a steering wheel sensing area;
within a first preset temperature range, acquiring a first induction signal corresponding to each test temperature according to the temperature step interval;
determining a middle threshold value after temperature compensation according to the initial threshold value, the first induction signal and the test temperature;
in a second preset temperature range, different working condition tests are carried out on different types of test objects at each test temperature to obtain a second induction signal;
and determining a calibration threshold value according to the intermediate threshold value, the second induction signal and the test temperature.
2. The method for calibrating the hands-free detection function of the steering wheel according to claim 1, wherein determining the intermediate threshold after temperature compensation according to the initial threshold, the first sensing signal and the test temperature comprises:
drawing a temperature compensation calibration curve according to the test temperature and the first induction signal;
determining temperature compensation data according to the temperature compensation calibration curve and the initial threshold;
and obtaining an intermediate threshold value according to the initial threshold value and the temperature compensation data.
3. The method for calibrating a steering wheel hands-off detection function according to claim 1, wherein determining a calibration threshold value according to the intermediate threshold value, the second sensing signal and the test temperature comprises:
determining a correction value according to the second induction signal corresponding to the test temperature and the intermediate threshold value;
and determining the calibration threshold value according to the intermediate threshold value and the correction value.
4. The method for calibrating the function of detecting the departure of a steering wheel from a hand as claimed in claim 1, wherein setting an initial threshold value according to the position of the sensing unit in the sensing area of the steering wheel comprises:
the steering wheel includes a first surface and a second surface, wherein the first surface and the second surface are opposing surfaces; the initial threshold values of the sensing units on the first surface are the same; the initial threshold values of the sensing units on the second surface are the same; the initial threshold of the sensing elements on the first surface is different from the initial threshold of the sensing elements on the second surface.
5. The method for calibrating a steering wheel hands-off detection function according to claim 2, further comprising, after determining a temperature-compensated intermediate threshold value according to the initial threshold value, the first sensing signal and the test temperature:
verifying whether the intermediate threshold eliminates the influence of different test temperatures on the induction signal; if the verification result is qualified, locking the temperature compensation data;
and if the temperature compensation data is not qualified, adjusting the temperature compensation data, and repeatedly verifying until the verification result is qualified.
6. The method for calibrating steering wheel hands-off detection function according to claim 1, further comprising, after determining a calibration threshold value according to the second sensing signal and the test temperature:
and verifying the calibration threshold according to different test object types.
7. The method for calibrating steering wheel hands-off detection function according to any one of claims 1 to 6, wherein the classification condition of the different types of test subjects includes at least one of weight, age and gender of the test population.
8. The method for calibrating the hands-off detection function of the steering wheel according to any one of claims 1 to 6, wherein the first preset temperature range is-40 ℃ to 85 ℃.
9. The method for calibrating the function of detecting the departure of a steering wheel from a hand according to any one of claims 1 to 6, wherein the sensing unit is at least one of a capacitance unit, a pressure unit and a camera unit.
10. An electronic device, characterized in that the electronic device comprises:
at least one processor; and
a memory communicatively coupled to the at least one processor; wherein,
the memory stores a computer program executable by the at least one processor to enable the at least one processor to perform a steering wheel hands-off detection function calibration method as claimed in any one of claims 1-9.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211445086.XA CN115752543A (en) | 2022-11-18 | 2022-11-18 | Method for calibrating steering wheel hands-off detection function and electronic equipment |
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| CN202211445086.XA CN115752543A (en) | 2022-11-18 | 2022-11-18 | Method for calibrating steering wheel hands-off detection function and electronic equipment |
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| CN118046906A (en) * | 2024-04-16 | 2024-05-17 | 深圳和而泰汽车电子科技有限公司 | Hand-off detection method and controller |
| CN118046906B (en) * | 2024-04-16 | 2024-08-02 | 深圳和而泰汽车电子科技有限公司 | Hand-off detection method and controller |
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