CN112776815A - Driving style judgment and identification method - Google Patents
Driving style judgment and identification method Download PDFInfo
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- CN112776815A CN112776815A CN202110204856.0A CN202110204856A CN112776815A CN 112776815 A CN112776815 A CN 112776815A CN 202110204856 A CN202110204856 A CN 202110204856A CN 112776815 A CN112776815 A CN 112776815A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W40/00—Estimation or calculation of non-directly measurable driving parameters for road vehicle drive control systems not related to the control of a particular sub unit, e.g. by using mathematical models
- B60W40/08—Estimation or calculation of non-directly measurable driving parameters for road vehicle drive control systems not related to the control of a particular sub unit, e.g. by using mathematical models related to drivers or passengers
- B60W40/09—Driving style or behaviour
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W2510/00—Input parameters relating to a particular sub-units
- B60W2510/06—Combustion engines, Gas turbines
- B60W2510/0604—Throttle position
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W2520/00—Input parameters relating to overall vehicle dynamics
- B60W2520/10—Longitudinal speed
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- Transportation (AREA)
- Mechanical Engineering (AREA)
- Control Of Transmission Device (AREA)
Abstract
The invention relates to the technical field of automobile control methods, in particular to a driving style judgment and identification method. Collecting a vehicle speed signal and an accelerator pedal opening signal of a vehicle, starting to sample the accelerator opening signal of the vehicle when the sampling condition is met, completing one-cycle sampling after the accumulated sampling time reaches a set value, dividing the accelerator opening and the accelerator opening change rate of each sampling point of the vehicle in the accumulated sampling time through a calibrated style curve graph, and counting the occupation ratio of the sampling points in each type of driving style in the style curve graph to determine the final driving style; the style curve chart is a curve chart which takes the accelerator opening as an abscissa and the accelerator opening change rate as an ordinate and comprises a plurality of style calibration curves obtained through calibration. The judgment result of the invention can reflect the real driving mode of the vehicle, and reasonably saves the power resource of the vehicle.
Description
Technical Field
The invention relates to the technical field of automobile control methods, in particular to a driving style judgment and identification method.
Background
Nowadays, most automatic transmission vehicles are equipped with a driving mode selection function, and drivers can select between three modes of 'normal', 'sport' and 'economy', but the modes all need manual operation. However, in practical conditions, few people can actively change the driving mode when driving, most drivers are in a 'D-to-bottom' state, and the driving experience is relatively single. In fact, the pursuit of the driving experience by the driver is increasingly extreme: the extreme driving freedom degree and the extreme driving entertainment feeling.
There is a chinese invention patent entitled "a driving behavior adaptive system and a driving behavior adaptive method" with a patent number "CN 104590274A", which introduces a driving behavior adaptive method for acquiring driving state information of a vehicle by using a driving information acquisition module; collecting the ambient environment condition of the vehicle by using a vehicle ambient environment collection module; analyzing the driving behavior of the driver by using a data recording and analyzing module according to the driving state information of the vehicle and the surrounding environment condition of the vehicle, and establishing a driving behavior model of the driver; and automatically controlling the driving behavior of the automobile according to the established driving behavior model by using the driving control module in a corresponding mode. The driving information acquisition module is connected with at least one of a steering wheel corner sensor, an automobile electronic stability control system and an engine management system and is used for acquiring driving state information of the vehicle, such as the magnitude of a steering wheel corner, the rotating speed of a steering wheel, the speed of the vehicle, the force of stepping on a brake pedal, the time point of stepping on the brake pedal, the opening degree of an accelerator pedal, the time point of stepping on the accelerator pedal and the like. The driving control module is internally provided with a plurality of driving modes, such as a user mode, a common mode, an energy-saving mode, a motion mode and the like, wherein the common mode, the energy-saving mode, the motion mode and the like are automatic driving modes pre-installed in the vehicle, the establishment rule of the automatic driving modes is the same as the establishment rule of corresponding modes in the existing auxiliary driving system, the user mode is a mode established after a driving behavior self-adaptive system learns the driving habits of a real driver and corresponds to the received driving behavior model, and when the driver selects the user mode, the driving control module can automatically control the driving behaviors of the vehicle according to the established driving behavior model.
Although the driving behavior self-adaptive scheme disclosed in the patent can collect the driving state information of the vehicle, analyze the driving behavior of the driver according to the driving state information of the vehicle, establish the driving behavior model of the driver, and then automatically control the driving behavior of the vehicle, the driving state data collected in the scheme cannot accurately reflect the real driving mode of the vehicle, and the power resources of the vehicle cannot be reasonably saved.
Disclosure of Invention
The present invention is directed to provide a driving style determination and recognition method, which solves the above-mentioned drawbacks of the prior art.
The technical scheme of the invention is as follows: a driving style judgment and identification method is characterized by comprising the following steps: collecting a vehicle speed signal and an accelerator pedal opening signal of a vehicle, starting to sample the accelerator opening signal of the vehicle when the sampling condition is met, completing one-cycle sampling after the accumulated sampling time reaches a set value, dividing the accelerator opening and the accelerator opening change rate of each sampling point of the vehicle in the accumulated sampling time through a calibrated style curve graph, and counting the occupation ratio of the sampling points in each type of driving style in the style curve graph to determine the final driving style;
the style curve chart is a curve chart which takes the accelerator opening as an abscissa and the accelerator opening change rate as an ordinate and comprises a plurality of style calibration curves obtained through calibration.
The style calibration curve further comprises an aggressive style calibration curve and a gentle style calibration curve; the aggressive style calibration curve is positioned above the gentle style calibration curve in the style curve graph;
and counting the sampling point occupation ratio above the aggressive style calibration curve, the sampling point occupation ratio below the smooth style calibration curve and the sampling point occupation ratio between the aggressive style calibration curve and the smooth style calibration curve in the style curve graph, and judging whether the driving style of the vehicle driver is aggressive style, smooth style or normal style according to the respective occupation ratio conditions.
The percentage of the number of sampling points above the aggressive style calibration curve in the further statistical style curve graph to the whole number of sampling points is an aggressive percentage; counting the percentage of the number of the sampling points above the flat style calibration curve in the style curve graph to the whole number of the sampling points as flat percentage; counting the percentage of the number of sampling points between an aggressive style calibration curve and a smooth style calibration curve in the style curve graph to the whole number of the sampling points as a normal percentage; judging that the driving style of the driver is an aggressive driving style when the aggressive percentage is larger than a first set value; judging that the driving style of the driver is the mild driving style when the mild percentage is greater than a second set value; and when the aggressive percentage is less than or equal to a first set value and the smooth percentage is less than or equal to a second set value, judging that the driving style of the driver is a normal driving style.
The first set value is more than or equal to 50%.
The second set value is more than or equal to 50 percent.
And further, the sampling conditions are that the vehicle speed is greater than 0 and the accelerator opening is greater than 0.
And further, when the sampling condition is met, instantaneous signals of the accelerator opening and the accelerator opening change rate of the vehicle are acquired at intervals.
The time of a further said interval is 10 ms.
After the previous sampling period is finished, taking a certain time point in the previous sampling period as the starting point of the next sampling period to perform next sampling; the time point is not the start of the previous sampling period or the end of the previous sampling period.
The further said point in time is the midpoint of the previous sampling period.
When the vehicle is used for the first time, the initial driving style is set to the normal driving style.
The driving style of the driver is judged by collecting the opening degree signal of the accelerator driven by the vehicle, the judging mode is very simple, the judging result is accurate, the convenience of the driver for driving the vehicle can be effectively improved, the real driving mode of the vehicle can be reflected by the judging result, the power resource of the vehicle is reasonably saved, and the method has great popularization value.
Drawings
FIG. 1: the driving style curve chart of the invention;
FIG. 2: the control module of the invention is shown schematically;
FIG. 3: the invention discloses a driving style switching schematic diagram.
Detailed Description
Reference will now be made in detail to the embodiments of the present invention, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
The invention is described in further detail below with reference to the figures and the specific embodiments.
The embodiment protects a driving style judging and identifying method, which judges and identifies the driving style of a driver by acquiring the accelerator opening and the accelerator opening change rate in the driving process of a vehicle, and judges whether the driving style of the driver is an aggressive driving style, a mild driving style or a normal driving style.
The vehicle control system of the embodiment integrates a driving style judgment and identification module, as shown in fig. 2, the identification module further comprises a receiving module, a sampling module, a processing module and a judging module, the receiving module collects vehicle speed data of a driver in a driving process by receiving a wheel speed sensor signal or vehicle speed signals sent by other control units such as an ESC (electronic stability control) and the like, collects accelerator opening data by an accelerator pedal sensor and calculates the accelerator opening change rate data in real time; and synchronously sending the received vehicle speed, the received accelerator opening and the calculated throttle opening change rate to a sampling module.
When the speed of a motor vehicle and accelerator opening all accord with the sampling condition, the sampling module begins the sampling, the sampling condition of this embodiment is, the speed of a motor vehicle > 0 and accelerator opening > 0, the sampling module carries out instantaneous sampling to accelerator opening and accelerator opening change rate when according with the sampling condition, then send sampling information to processing module, sampling module carries out once sampling every 10ms at interval, the sampling of this round is accomplished when accumulative sampling time reaches S (just sample when satisfying the sampling condition, do not sample when unsatisfied, accumulative sampling time can be markd, for example 10min), each sampled data contains the characteristic: accelerator opening and rate of change of accelerator opening; taking an absolute value of the change rate of the opening degree of the throttle; the synchronization sends the sampled data to the processing module.
The processing module comprises a style curve graph obtained through calibration, the style curve graph is a curve graph which takes the opening degree of the accelerator as an abscissa and the change rate of the opening degree of the accelerator as an ordinate and comprises an aggressive style calibration curve and a gentle style calibration curve, the aggressive style calibration curve is positioned above the gentle style calibration curve in the style curve graph, namely, under the condition of the same accelerator opening, the throttle opening change rate in the aggressive style calibration curve is greater than that of the gentle style calibration curve, the aggressive style calibration curve and the gentle style calibration curve divide the style curve chart into three areas, as shown in fig. 1, the area between the aggressive style calibration curve and the vertical axis, the area between the aggressive style calibration curve and the flat style calibration curve, and the area between the flat style calibration curve and the horizontal axis are shown respectively. The aggressive style calibration curve and the smooth style calibration curve of the present embodiment are curves obtained by performing calibration by acquiring a large amount of driving data according to an actual vehicle.
The sampling module sends the sampling data to the processing module, the processing module processes the data of the sampling points, namely the accelerator opening and the accelerator opening change rate, draws the sampling point data into a style curve graph, then counts the sampling point data in the region I, the region II and the region III, calculates the sampling ratio of the region I, namely the number of the region I sampling points/(the number of the region I sampling points + the number of the region III sampling points), the sampling ratio of the region II, namely the number of the region II sampling points/(the number of the region I sampling points + the number of the region II sampling points + the number of the region III sampling points), and the sampling ratio of the region III, namely the number of the region II sampling points/(the number of the region II sampling points + the number of the region III sampling points). The data is then transmitted to a decision module, by which the driving style is determined.
The judging module judges the style according to the received sampling point proportion data of each area: when the sampling occupation ratio of the area (i) is greater than an aggressive type judgment limit value (which can be calibrated, in the embodiment, more than 50%), identifying that the driving style of the driver is aggressive type; when the sampling percentage of the area II is larger than the normal type judgment limit value (which can be calibrated, the sampling percentage is more than 50 percent in the embodiment), identifying that the driving style of the driver is a normal type; and when the sampling occupation ratio of the area (c) is larger than the mild type judgment limit value (which can be calibrated and is more than 50% of the recommendation), identifying that the driving style of the driver is mild type. And outputting the target mode according to the recognition result, and sending the target mode to a power control system, an instrument system, an MP5 system and the like.
If multiple sampling cycles are performed, in order to maintain sampling continuity and avoid large fluctuation, in this embodiment, after a previous sampling cycle is completed, a certain time point in the previous sampling cycle is used as a starting point of a next sampling cycle to perform next sampling, and the time point is not a starting point of the previous sampling cycle or an end point of the previous sampling cycle. The time point of this embodiment is the midpoint of the previous sampling cycle (calibration acquisition).
When the vehicle is used for the first time, the initial style is set to be a normal type, and the vehicle is switched immediately after each round of identification is completed.
Storing a current identification result when the vehicle is powered off as a default style when the vehicle is powered on next time; and when the power is supplied again, clearing the accumulated time and resampling.
In the embodiment, after the driving style is judged and identified, the driving style is sent to a control system, an instrument system, an MP5 system and the like, instrument display and voice prompt are added after the driving style is identified, and music recommendation can be carried out after the voice prompt.
Different gears are divided according to the proportion degree in different driving styles, different star rating or percentage scores are given, for example, the driving style is also an aggressive driving style, and the higher the proportion of stars is, the higher the percentage of stars is; style coefficient prompts are added in the vehicle-machine interconnection APP and displayed in a client group, so that the entertainment is enhanced; besides the scheme, different exhaust noises can be set for different driving styles, the gentle driving style is more pleasant, and the aggressive driving style is more dynamic.
In fact, different driving styles can be switched with each other, as shown in fig. 3, when the ratio of the originally aggressive driving style is lower than the set limit value StoN during driving, the aggressive driving style is converted into the normal driving style, and conversely, when the ratio of the originally normal driving style is higher than the set limit value NtoS during driving, the normal driving style is converted into the aggressive driving style;
when the ratio of the normal driving style is lower than a set limit NtoE in the driving process, the normal driving style is converted into a mild driving style, otherwise, when the ratio of the mild driving style is higher than a set limit EtoN in the driving process, the mild driving style is converted into the normal driving style;
when the ratio of the original aggressive driving style is lower than the set limit StoE in the driving process, the aggressive driving style is converted into the mild driving style, and on the contrary, when the ratio of the original mild driving style is higher than the set limit EtoS in the driving process, the mild driving style is converted into the aggressive driving style.
I.e. the three driving styles may be switched over to each other.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are given by way of illustration of the principles of the present invention, and that various changes and modifications may be made without departing from the spirit and scope of the invention as defined by the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (10)
1. A driving style judgment and identification method is characterized by comprising the following steps: collecting a vehicle speed signal and an accelerator pedal opening signal of a vehicle, starting to sample the accelerator opening signal of the vehicle when the sampling condition is met, completing one-cycle sampling after the accumulated sampling time reaches a set value, dividing the accelerator opening and the accelerator opening change rate of each sampling point of the vehicle in the accumulated sampling time through a calibrated style curve graph, and counting the occupation ratio of the sampling points in each type of driving style in the style curve graph to determine the final driving style;
the style curve chart is a curve chart which takes the accelerator opening as an abscissa and the accelerator opening change rate as an ordinate and comprises a plurality of style calibration curves obtained through calibration.
2. The driving style determination and recognition method according to claim 1, wherein: the style calibration curve comprises an aggressive style calibration curve and a gentle style calibration curve; the aggressive style calibration curve is positioned above the gentle style calibration curve in the style curve graph;
and counting the sampling point occupation ratio above the aggressive style calibration curve, the sampling point occupation ratio below the smooth style calibration curve and the sampling point occupation ratio between the aggressive style calibration curve and the smooth style calibration curve in the style curve graph, and judging whether the driving style of the vehicle driver is aggressive style, smooth style or normal style according to the respective occupation ratio conditions.
3. A driving style determination and recognition method according to claim 2, characterized in that: counting the percentage of the number of sampling points above the aggressive style calibration curve in the style curve graph to the whole number of the sampling points as aggressive percentage; counting the percentage of the number of the sampling points above the flat style calibration curve in the style curve graph to the whole number of the sampling points as flat percentage; counting the percentage of the number of sampling points between an aggressive style calibration curve and a smooth style calibration curve in the style curve graph to the whole number of the sampling points as a normal percentage; judging that the driving style of the driver is an aggressive driving style when the aggressive percentage is larger than a first set value; judging that the driving style of the driver is the mild driving style when the mild percentage is greater than a second set value; and when the aggressive percentage is less than or equal to a first set value and the smooth percentage is less than or equal to a second set value, judging that the driving style of the driver is a normal driving style.
4. A driving style determination and recognition method according to claim 3, characterized in that: the first set value is more than or equal to 50 percent.
5. A driving style determination and recognition method according to claim 3, characterized in that: the second set value is more than or equal to 50 percent.
6. The driving style determination and recognition method according to claim 1, wherein: the sampling conditions are that the vehicle speed is greater than 0 and the accelerator opening is greater than 0.
7. The driving style determination and recognition method according to claim 1, wherein: and when the sampling condition is met, instantaneous signals of the accelerator opening and the accelerator opening change rate of the vehicle are acquired at intervals.
8. The driving style determination and recognition method according to claim 1, wherein: after the previous sampling period is finished, taking a certain time point in the previous sampling period as the starting point of the next sampling period to perform sampling of the next round; the time point is not the start of the previous sampling period or the end of the previous sampling period.
9. The driving style determination and recognition method according to claim 8, wherein: the time point is the middle point of the previous sampling period.
10. A driving style determination and recognition method according to claim 2, characterized in that: when the vehicle is used for the first time, the initial driving style is set to the normal type driving style.
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Cited By (1)
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| CN113291312A (en) * | 2021-06-18 | 2021-08-24 | 重庆长安汽车股份有限公司 | Intelligent power assembly control method |
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