CN113815624A

CN113815624A - Driving behavior evaluation method, driving behavior evaluation device, vehicle, and storage medium

Info

Publication number: CN113815624A
Application number: CN202010563311.4A
Authority: CN
Inventors: 单新; 曹欣; 杨冬生; 刘柯; 王欢
Original assignee: BYD Co Ltd
Current assignee: BYD Co Ltd
Priority date: 2020-06-19
Filing date: 2020-06-19
Publication date: 2021-12-21
Anticipated expiration: 2040-06-19
Also published as: CN113815624B

Abstract

The invention discloses a driving behavior evaluation method, a driving behavior evaluation device, a vehicle and a storage medium, wherein the evaluation method comprises the following steps: acquiring the depth, speed and acceleration of a brake pedal of a vehicle; obtaining key characteristic parameters for evaluating the driving level according to the depth of the brake pedal, the vehicle speed and the acceleration, wherein the key characteristic parameters comprise the depth parameter of the brake pedal and the acceleration parameter; and calculating a driving score according to the depth parameter and the acceleration parameter of the brake pedal. According to the driving behavior evaluation method, the driving level is evaluated based on the depth of the brake pedal, the speed and the acceleration, evaluation parameters are simplified, the processing amount of the evaluation parameters is reduced, and the evaluation speed is improved.

Description

Driving behavior evaluation method, driving behavior evaluation device, vehicle, and storage medium

Technical Field

The invention relates to the technical field of vehicles, in particular to a driving behavior evaluation method and device, a vehicle and a storage medium.

Background

At present, an evaluation method for a driving behavior of a vehicle mainly collects driving behavior data by using an Electronic Control Unit (ECU) of the vehicle, transmits the driving behavior data to an analysis terminal, and the analysis terminal analyzes the driving behavior data to determine which driving behaviors are bad driving behaviors. However, such a driving behavior evaluation method generally analyzes each driving behavior data individually, obtains a corresponding evaluation result for each driving behavior, and generally does not consider whether the evaluation result is accurate or not.

Disclosure of Invention

The present invention is directed to solving, at least to some extent, one of the technical problems in the related art. Therefore, an object of the present invention is to provide a driving behavior evaluation method to reduce the processing amount, increase the processing speed, and ensure the accuracy of the scoring.

A second object of the present invention is to provide a driving behavior evaluation device.

A third object of the invention is to propose a computer-readable storage medium.

A fourth object of the invention is to propose a vehicle.

In order to achieve the above object, a driving behavior evaluation method according to an embodiment of a first aspect of the present invention includes: acquiring the depth, speed and acceleration of a brake pedal of a vehicle; obtaining key characteristic parameters for evaluating the driving level according to the depth of the brake pedal, the vehicle speed and the acceleration, wherein the key characteristic parameters comprise a depth parameter of the brake pedal and an acceleration parameter; and calculating a driving score according to the depth parameter of the brake pedal and the acceleration parameter.

According to the driving behavior evaluation method, the key characteristic parameters are extracted based on the depth of the brake pedal, the speed and the acceleration, the driving level is evaluated based on the key characteristic parameters, and the evaluation parameters are simplified, so that the processing amount of the evaluation parameters is reduced, and the evaluation speed is increased.

In order to achieve the above object, a second aspect of the present invention provides a driving behavior evaluation device, including: the acquisition module is used for acquiring the depth, the speed and the acceleration of a brake pedal of a vehicle; the extraction module is used for obtaining key characteristic parameters for evaluating the driving level according to the depth of the brake pedal, the vehicle speed and the acceleration, wherein the key characteristic parameters comprise a depth parameter of the brake pedal and an acceleration parameter; and the calculating module is used for calculating a driving score according to the depth parameter of the brake pedal and the acceleration parameter.

The driving behavior evaluation device provided by the embodiment of the invention extracts the key characteristic parameters based on the depth of the brake pedal, the speed and the acceleration, evaluates the driving level based on the key characteristic parameters, simplifies the evaluation parameters, reduces the processing amount of the evaluation parameters and further improves the evaluation speed.

To achieve the above object, a third aspect of the present invention provides a machine-readable storage medium, on which a computer program is stored, and the computer program, when executed by a processor, implements the evaluation method of the above embodiment.

In order to achieve the above object, a fourth aspect of the present invention provides a vehicle, including a memory, a processor, and a computer program stored in the memory, wherein when the computer program is executed by the processor, the evaluation method of the above embodiment is implemented.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

FIG. 1 is a flow chart diagram of a driving behavior evaluation method according to an embodiment of the present invention;

FIG. 2 is a flow chart illustrating a driving behavior evaluation method according to an embodiment of the present invention;

fig. 3 is a block diagram showing the structure of a driving behavior evaluation device according to an embodiment of the present invention;

fig. 4 is a block diagram showing the structure of a driving behavior evaluation device according to another embodiment of the present invention.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function 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.

The driving behavior evaluation method, device, vehicle, and storage medium according to the embodiments of the present invention are described below with reference to the drawings.

Fig. 1 is a flowchart of a driving behavior evaluation method according to an embodiment of the present invention.

As shown in fig. 1, the driving behavior evaluation method includes the steps of:

and S11, acquiring the depth, speed and acceleration of the brake pedal of the vehicle.

The depth, the speed and the acceleration of a brake pedal of the vehicle can be detected by corresponding sensors, and the vehicle starts on the premise that each sensor works. Specifically, when the driver drives the vehicle, the detection value of each sensor may be transmitted to the ECU through a CAN (Controller Area Network).

And S12, obtaining key characteristic parameters for evaluating the driving level according to the depth of the brake pedal, the vehicle speed and the acceleration, wherein the key characteristic parameters comprise the depth parameter of the brake pedal and the acceleration parameter.

Specifically, obtaining key characteristic parameters for evaluating the driving level according to the depth of a brake pedal and the acceleration of the vehicle speed may include: acquiring the depths of the brake pedal acquired in three continuous sampling periods, and recording the depths as a first depth, a second depth and a third depth respectively, wherein the three continuous sampling periods are recorded as a first sampling period, a second sampling period and a third sampling period respectively; and if the first depth and the third depth are both smaller than or equal to the depth threshold value and the second depth is larger than the depth threshold value, taking the second depth as the depth parameter of the brake pedal.

Wherein the sampling period may be the duty cycle of the sensor.

Specifically, when the driving behavior is evaluated, the brake pedal depths acquired in three consecutive sampling periods may be acquired, for example, after the sensor starts to operate, the brake pedal depths acquired in the first three periods are acquired, which are D1 acquired in the first period, D2 acquired in the second period, and D3 acquired in the third period, respectively. Judging whether D1, D2 and D3 meet the conditions: d is not less than D1 and less than D2, and D3 and less than D2, wherein D is a depth threshold value, can be calibrated according to needs and is stored in advance.

If the brake pedal depth parameter meets the requirement, D2 is the maximum value of D1, D2 and D3, the corresponding acceleration value is the maximum value, at the moment, D2 can be used as the brake pedal depth parameter for driving behavior evaluation, and the next time the brake pedal depth parameter is obtained. And if not, acquiring the depth parameter of the brake pedal next time. The depth of the brake pedal acquired in the second period, the third period and the fourth period can be acquired next time, the depth of the brake pedal acquired in the third period, the fourth period and the fifth period can be acquired next time, and the like are repeated until driving is completed.

Further, obtaining key characteristic parameters for evaluating the driving level according to the depth of the brake pedal, the vehicle speed and the acceleration may further include: acquiring vehicle speeds acquired in a second sampling period and a third sampling period, and recording the vehicle speeds as a second speed and a third speed respectively; and if the second speed is greater than the speed threshold value and the third speed is less than or equal to the speed threshold value, taking the acceleration acquired in the second sampling period as the acceleration parameter.

Wherein, the work periods of the sensors for detecting the depth of the brake pedal, the vehicle speed and the acceleration may be the same. Specifically, while the brake pedal depth is acquired for three consecutive sampling periods, the vehicle speed in the last two sampling periods and the acceleration in the middle sampling period may be acquired, which are the vehicle speed V1 acquired in the second sampling period, the vehicle speed V2 acquired in the third sampling period, and the acceleration a acquired in the second sampling period, respectively. And judging whether V3 is more than or equal to V2, wherein V is a vehicle speed threshold value, can be calibrated as required and is stored in advance.

If the acceleration parameter is satisfied, the vehicle enters a deceleration working condition, a is less than 0, at the moment, a is used as the acceleration parameter for driving behavior evaluation, and the next brake pedal depth parameter is obtained. And if not, acquiring the depth parameter of the brake pedal next time. The vehicle speed acquired in the third period and the vehicle speed acquired in the fourth period can be acquired next time, the acceleration acquired in the third period is acquired in the fourth period and the fifth period again, the acceleration acquired in the fourth period is analogized in turn until the driving is finished.

Alternatively, the sampling period may be a value greater than the duty cycle of the sensor, for example, the sampling period is 2 × the duty cycle, that is, each sampling period includes two collected data, and in this case, the average value of the two collected data may be referred to as D1, D2, D3, V1, V2, a.

And S13, calculating a driving score according to the depth parameter and the acceleration parameter of the brake pedal.

Specifically, calculating a driving score according to a brake pedal depth parameter and an acceleration parameter includes: determining a depth interval of the depth parameter of the brake pedal, adding 1 to a brake count value corresponding to the depth interval, and adding 1 to a total brake count value; determining the acceleration interval of the acceleration parameter, adding 1 to the accelerometer value corresponding to the acceleration interval, and adding 1 to the total acceleration count value; acquiring a corresponding depth weight according to the depth interval, and acquiring a corresponding acceleration weight according to the acceleration interval; calculating a driving score by the following formula (1):

wherein, Total _ grade is driving grade, grade _ break is braking grade, grade _ acceleration is acceleration grade, k is preset parameter, k value can be 5, factor _ break is depth weight, break _ counter is brake count value corresponding to depth interval corresponding to factor _ break, Σ break _ counter is Total brake count value, factor _ acc is acceleration weight, acc _ counter is accelerometer value corresponding to acceleration interval corresponding to factor _ acc, Σ acc _ counter is Total acceleration count value.

As an example, after obtaining the brake pedal depth parameter (which may be 0-1), the brake pedal depth parameter may be multiplied by 100 to perform measurement conversion, and is recorded as Brakepedal _ event, for example, if the brake pedal depth parameter is 0.8, the Brakepedal _ event is 80, and the total brake count value is added by 1.

In this example, the brake pedal depth parameter after the metric conversion can be divided into five depth intervals of [0,20 ], [20,40 ], [40,60 ], [60,80 ], [80,100], and each interval is sequentially given different weights of factor _ brake _20, factor _ brake _40, factor _ brake _60, factor _ brake _80, and factor _ brake _100, wherein each weight can be determined through experiments, and the sum can be 1. The depth section where the Brakepedal _ event is located is determined, and the brake count value of the corresponding depth section is incremented by 1, for example, if the Brakepedal _ event is 80, the brake count value of the depth section [80,100] is incremented by 1.

Meanwhile, the acceleration parameter can be divided into three acceleration intervals of [ -x, -2), [ -2, -1), [ -1,0), and different weights are sequentially given to each interval: factor _ acc _1, factor _ acc _2, factor _ acc _3, where each weight can be determined experimentally, and the sum can be 1. Judging the acceleration interval in which the acceleration parameter is located, and adding 1 to the accelerometer value in the corresponding interval, for example, if the acceleration parameter is-2, adding 1 to the accelerometer value in the interval [ -2. -1). It should be noted that the limit value-x of the acceleration parameter may be determined through a large number of experiments, and the value thereof may be-3.

The method for dividing the depth interval and the acceleration interval is not limited to the above method, and may be divided into 4 depth intervals, 4 acceleration intervals, 6 depth intervals, 3 acceleration intervals, and the like, and may be specifically set according to a vehicle type, a work condition, and the like.

Further, immediately after the driving (before the vehicle is powered off), the driving score can be calculated by using the above formula (1).

Therefore, the driving behavior evaluation method provided by the embodiment of the invention extracts the key characteristic parameters based on the depth of the brake pedal, the vehicle speed and the acceleration, evaluates the driving level based on the key characteristic parameters, simplifies the evaluation parameters, reduces the processing amount of the evaluation parameters and further improves the evaluation speed. Meanwhile, the driving behavior can be accurately evaluated by carrying out interval division on the depth and the acceleration of the brake pedal and giving reasonable weight.

In one embodiment of the present invention, the driving behavior evaluation method may further include: acquiring the driving mileage of a vehicle; and calibrating the driving score according to the driving mileage and the driving score to obtain a first calibration score.

The driving range may be the sum of an initial range (for example, the total driving range after the vehicle finishes driving last time) and the driving range from the vehicle starts driving to the current time. For example, totalmils ═ vehicle _ speed × (T/3600) + miles _ initiative, where totalmils is the traveled mileage, vehicle _ speed is the current vehicle speed, miles _ initiative is the initial mileage, and T is the travel time.

Specifically, the calibrating the driving score according to the driving mileage and the driving score may include: if the driving mileage is less than or equal to the preset mileage, taking the driving score as a first calibration score; if the driving mileage is greater than the preset mileage and the driving Score is less than or equal to the preset Score, acquiring a first mileage weight corresponding to the mileage interval where the driving mileage is located, and obtaining a first calibration Score according to a formula of Score (Total _ grade +15 factor _ low), wherein Score is the first calibration Score, Total _ grade is the driving Score, and factor _ low is the first mileage weight; if the driving mileage is greater than the preset mileage and the driving Score is greater than the preset Score, acquiring a second mileage weight corresponding to the mileage interval where the driving mileage is located, and obtaining a first calibration Score according to a formula Score (Total _ grade + (100-Total _ grade) factor _ high, wherein the factor _ high is the second mileage weight.

As an example, the method for calibrating the driving score according to the driving mileage and the driving score to obtain the first calibration score may be as follows in table 1:

TABLE 1

In table 1, factor _ miles _1500_ low represents the weight corresponding to the point less than or equal to 85 points, and the mileage greater than 1000 kilometers less than 1500 kilometers; factor _ miles _1500__ high represents the weight for a score greater than 85 points and a mileage greater than 1000 kilometers less than 1500 kilometers; the factor _ miles _2000_ low represents the weight corresponding to the point less than or equal to 85 points and the mileage more than 1500 kilometers less than 2000 kilometers; the factor _ miles _2000_ high represents the weight corresponding to the point of more than 85 points and the mileage of more than 1500 kilometers and less than 2000 kilometers; the factor _ miles _2500_ low represents the weight corresponding to the point less than or equal to 85 points and the mileage more than 2000 kilometers less than 2500 kilometers; the factor _ miles _2500_ low represents the weight corresponding to the point less than 85 points and the mileage greater than 2000 kilometers less than 2500 kilometers; the factor _ miles _3000_ low represents the weight corresponding to the point less than or equal to 85 points and the mileage more than 2500 kilometers and less than 3000 kilometers; the factor _ miles _3000_ low represents the weight corresponding to the point less than 85 points and the mileage more than 2500 kilometers and less than 3000 kilometers; the factor _ miles _3500_ low represents the weight corresponding to the point less than or equal to 85 points and the mileage more than 3000 kilometers less than 3500 kilometers; the factor _ miles _3500_ low represents the weight corresponding to the point less than 85 points and the mileage more than 3000 kilometers less than 3500 kilometers; the factor _ miles _4000_ low represents that the score is less than or equal to 85 points, and the mileage is greater than 3500 kilometers and less than 4000 kilometers; the factor _ miles _4000_ low represents that the score is less than 85 points, and the mileage is greater than 3500 kilometers and less than 4000 kilometers; the factor _ miles _5000_ low represents that the score is less than or equal to 85 points, and the mileage is more than 4000 kilometers and less than 5000 kilometers; the factor _ miles _5000_ low represents the weight corresponding to the score being less than 85 points and the mileage being more than 4000 kilometers and less than 5000 kilometers.

It should be noted that the division method of the mileage interval may not be limited to the above table 1.

Thus, the driving score is calibrated by the driving distance, and the accuracy of driving behavior evaluation can be further improved.

In one embodiment of the present invention, the driving behavior evaluation method may further include: acquiring a driving score of the vehicle before last power-off, and recording the driving score as an initial score; and calibrating the first calibration score according to the initial score to obtain a second calibration score.

Specifically, performing a calibration process on the first calibration score according to the initial score may include: if the first calibration Score is smaller than the initial Score and the sum of the total brake count value and the total acceleration count value is smaller than or equal to the sum threshold, obtaining a Score weight Score _ pull _ factor _ H corresponding to a Score interval of the first calibration Score, and obtaining a second calibration Score according to a formula Score ═ Score + (Score _ initial-Score) · Score _ pull _ factor _ H, wherein Score' is the second calibration Score, Score is the first calibration Score, and Score _ initial is the initial Score; if the first calibration Score is smaller than the initial Score and the sum of the total brake count value and the total acceleration count value is larger than the sum threshold, obtaining a Score weight Score _ pull _ factor _ L corresponding to the Score interval of the first calibration Score, and obtaining a second calibration Score according to the formula Score ═ Score + (Score _ initial-Score) · Score _ pull _ factor _ L.

Wherein, the sum threshold can be set according to the requirement, such as 10; the first calibration Score may be divided into five Score intervals of [0,65], (65,70], (70,75], (75,80] (80,100], when the sum of the total brake count value and the total acceleration count value is less than or equal to the sum threshold, the Score weight Score _ pull _ factor _ H corresponding to each Score interval is sequentially decreased, and when the sum of the total brake count value and the total acceleration count value is greater than the sum threshold, the Score weight Score _ pull _ factor _ L corresponding to each Score interval is sequentially decreased.

Thus, the driving score is calibrated by the score of the last power-off of the vehicle, and the accuracy of the driving behavior evaluation can be further improved.

For convenience of understanding, the process of obtaining the driving score will be described by taking the second calibration score as the driving score of the current driving behavior. As shown in fig. 2, the process of obtaining the driving score of the current driving behavior includes:

first, input data required for driving behavior evaluation is acquired, including brake pedal depth, acceleration, vehicle speed, initial mileage, and driving score before last power-down.

Then, the driving score of this time is obtained according to the input data. Specifically, brake pedal depth parameter intervals are divided, the brake proportion of the corresponding interval is calculated, and the brake proportion is multiplied by the depth weight corresponding to each interval to obtain a score corresponding to the brake pedal depth; and dividing acceleration parameter intervals, multiplying the acceleration parameter intervals by the acceleration weight corresponding to each interval to obtain the score corresponding to the acceleration, and obtaining the driving score according to the two scores. Calibrating the driving score based on the driving mileage to obtain a first calibration score; and calibrating the first calibration score based on the driving score of the vehicle before the vehicle is powered off last time to obtain a second calibration score, and taking the second calibration score as the driving score of the driving behavior.

And finally, outputting the driving score of the driving behavior. In order to obtain the driving score of the next time, the driving mileage of the vehicle can be output simultaneously.

Optionally, the driving score is located in a range including [0,60], (60,70], (70,80], (80,90], (90,100], and the corresponding levels can be marked as level 1, level 2, level 3, level 4, and level 5, and the corresponding meanings can be poor level, normal novice level, normal level, robust old hand, and vehicle spirit, respectively.

In summary, the driving behavior evaluation method provided by the embodiment of the invention extracts the key characteristic parameters based on the depth of the brake pedal, the vehicle speed and the acceleration, and evaluates the driving level based on the key characteristic parameters, so that the evaluation parameters are simplified, the processing amount of the evaluation parameters is reduced, and the evaluation speed is further improved. Meanwhile, the driving behavior can be accurately evaluated by carrying out interval division on the depth and the acceleration of the brake pedal and giving reasonable weight; through the driving mileage and the scoring of the last power-off of the vehicle, the driving score is calibrated, the accuracy of the driving behavior evaluation can be further improved, the driving level of the driver can be accurately positioned, the personalized driving assistance function can be conveniently provided for the drivers with different driving levels, and the driving experience and the driving safety can be favorably improved.

Fig. 3 is a block diagram showing the configuration of a driving behavior evaluation device according to an embodiment of the present invention.

As shown in fig. 3, the driving behavior evaluation device 100 includes: an acquisition module 110, an extraction module 120, and a calculation module 130.

The obtaining module 110 is configured to obtain a brake pedal depth, a vehicle speed, and an acceleration of the vehicle; the extraction module 120 is configured to obtain key feature parameters for evaluating a driving level according to a depth of a brake pedal, a vehicle speed, and an acceleration, where the key feature parameters include a depth parameter of the brake pedal and an acceleration parameter; the calculation module 130 is configured to calculate a driving score according to the brake pedal depth parameter and the acceleration parameter.

In an embodiment of the present invention, the extraction module 120 is specifically configured to obtain brake pedal depths acquired in three consecutive sampling periods, which are respectively recorded as a first depth, a second depth, and a third depth, where the three consecutive sampling periods are respectively recorded as a first sampling period, a second sampling period, and a third sampling period; and if the first depth and the third depth are both smaller than or equal to the depth threshold value and the second depth is larger than the depth threshold value, taking the second depth as the depth parameter of the brake pedal. Acquiring vehicle speeds acquired in a second sampling period and a third sampling period, and recording the vehicle speeds as a second speed and a third speed respectively; and if the second speed is greater than the speed threshold value and the third speed is less than or equal to the speed threshold value, taking the acceleration acquired in the second sampling period as the acceleration parameter.

In an embodiment of the present invention, the calculating module 130 is specifically configured to determine a depth interval of the brake pedal depth parameter, add 1 to a brake count value corresponding to the depth interval, and add 1 to a total brake count value; determining the acceleration interval of the acceleration parameter, adding 1 to the accelerometer value corresponding to the acceleration interval, and adding 1 to the total acceleration count value; acquiring a corresponding depth weight according to the depth interval, and acquiring a corresponding acceleration weight according to the acceleration interval; calculating a driving score by the following formula:

wherein, Total _ grade is driving grade, grade _ break is braking grade, grade _ acceleration is acceleration grade, k is the preset parameter, factor _ break is depth weight, break _ counter is the brake count value that factor _ break corresponds depth interval to, Σ break _ counter is Total count value of braking, factor _ acc is acceleration weight, acc _ counter is the accelerometer numerical value that factor _ acc corresponds acceleration interval to, Σ acc _ counter is Total count value of acceleration.

In one embodiment of the invention, the obtaining module 110 may also be used to obtain the mileage of the vehicle. In this embodiment, as shown in fig. 4, the evaluation apparatus 100 may further include a calibration module 140, and the calibration module 140 is configured to perform a calibration process on the driving score according to the driving mileage and the driving score, so as to obtain a first calibration score.

The calibration module 140 is specifically configured to take the driving score as a first calibration score when the driving mileage is less than or equal to a preset mileage; when the driving mileage is greater than the preset mileage and the driving Score is less than or equal to the preset Score, acquiring a first mileage weight corresponding to a mileage interval where the driving mileage is located, and obtaining a first calibration Score according to a formula of Score (Total _ grade +15 factor _ low), wherein Score is the first calibration Score, Total _ grade is the driving Score, and factor _ low is the first mileage weight; when the driving mileage is greater than the preset mileage and the driving Score is greater than the preset Score, acquiring a second mileage weight corresponding to a mileage interval where the driving mileage is located, and obtaining a first calibration Score according to a formula Score (Total _ Score + (100-Total _ Score) factor _ high, wherein the factor _ high is the second mileage weight.

In one embodiment of the present invention, the obtaining module 110 may be further configured to obtain a driving score of the vehicle before the last power-off, which is recorded as the initial score. In this embodiment, the calibration module 140 may further be configured to perform a calibration process on the first calibration score according to the initial score to obtain a second calibration score.

The calibration module 140 is specifically configured to: when the first calibration Score is smaller than the initial Score and the sum of the total brake count value and the total acceleration count value is smaller than or equal to the sum threshold, obtaining a Score weight Score _ pull _ factor _ H corresponding to a Score interval of the first calibration Score, and obtaining a second calibration Score according to a formula Score ═ Score + (Score _ initial-Score) · Score _ pull _ factor _ H, wherein Score' is the second calibration Score, Score is the first calibration Score, and Score _ initial is the initial Score; when the first calibration Score is smaller than the initial Score and the sum of the total brake count value and the total acceleration count value is larger than the sum threshold, obtaining a Score weight Score _ pull _ factor _ L corresponding to a Score interval where the first calibration Score is located, and obtaining a second calibration Score according to a formula Score ═ Score + (Score _ initial-Score) · Score _ pull _ factor _ L.

For other specific embodiments of the driving behavior evaluation device according to the embodiment of the present invention, reference may be made to specific embodiments of the driving behavior evaluation method according to the above-described embodiment of the present invention.

In summary, the driving behavior evaluation device according to the embodiment of the invention evaluates the driving level based on the depth of the brake pedal, the vehicle speed and the acceleration, simplifies the evaluation parameters, reduces the processing amount of the evaluation parameters, and further improves the evaluation speed. Meanwhile, the driving behavior can be accurately evaluated by carrying out interval division on the depth and the acceleration of the brake pedal and giving reasonable weight; through the driving mileage and the scoring of the last power-off of the vehicle, the driving score is calibrated, the accuracy of the driving behavior evaluation can be further improved, the driving level of the driver can be accurately positioned, the personalized driving assistance function can be conveniently provided for the drivers with different driving levels, and the driving experience and the driving safety can be favorably improved.

The invention also provides a computer readable storage medium.

In this embodiment, a computer program is stored on a computer-readable storage medium, and when executed by a processor, implements the evaluation method of the above-described embodiment.

The computer-readable storage medium of the embodiment of the invention simplifies the evaluation parameters, reduces the processing amount of the evaluation parameters and improves the evaluation speed when the computer program corresponding to the evaluation method stored on the computer-readable storage medium is executed by the processor. Meanwhile, the driving level of the driver can be accurately positioned, personalized driving assistance functions can be conveniently provided for the drivers with different driving levels, and the driving experience and the driving safety can be improved.

The invention also provides a vehicle.

In this embodiment, the vehicle comprises a memory, a processor and a computer program stored on the memory, which when executed by the processor implements the evaluation method of the above-described embodiment.

According to the vehicle provided by the embodiment of the invention, when the computer program corresponding to the evaluation method and stored in the memory of the vehicle is executed by the processor, the evaluation parameters are simplified, the processing amount of the evaluation parameters is reduced, and the evaluation speed is improved. Meanwhile, the driving level of the driver can be accurately positioned, personalized driving assistance functions can be conveniently provided for the drivers with different driving levels, and the driving experience and the driving safety can be improved.

It should be noted that the logic and/or steps represented in the flowcharts or otherwise described herein, such as an ordered listing of executable instructions that can be considered to implement logical functions, can be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processor-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. For the purposes of this description, a "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of the computer-readable medium would include the following: an electrical connection (electronic device) having one or more wires, a portable computer diskette (magnetic device), a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). Additionally, the computer-readable medium could even be paper or another suitable medium upon which the program is printed, as the program can be electronically captured, via for instance optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner if necessary, and then stored in a computer memory.

It should be understood that portions of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the 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 at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.

Claims

1. A driving behavior evaluation method characterized by comprising the steps of:

acquiring the depth, speed and acceleration of a brake pedal of a vehicle;

obtaining key characteristic parameters for evaluating the driving level according to the depth of the brake pedal, the vehicle speed and the acceleration, wherein the key characteristic parameters comprise a depth parameter of the brake pedal and an acceleration parameter;

and calculating a driving score according to the depth parameter of the brake pedal and the acceleration parameter.

2. The method of claim 1, wherein deriving key feature parameters for evaluating driving level based on the brake pedal depth, the vehicle speed, and the acceleration comprises:

acquiring brake pedal depths acquired in three continuous sampling periods, and recording the brake pedal depths as a first depth, a second depth and a third depth respectively, wherein the three continuous sampling periods are recorded as a first sampling period, a second sampling period and a third sampling period respectively;

and if the first depth and the third depth are both smaller than or equal to a depth threshold value and the second depth is larger than the depth threshold value, taking the second depth as the depth parameter of the brake pedal.

3. The method of claim 2, wherein the deriving key feature parameters for evaluating a driving level from the brake pedal depth, the vehicle speed, and the acceleration further comprises:

acquiring the vehicle speeds acquired in the second sampling period and the third sampling period, and recording the vehicle speeds as a second speed and a third speed respectively;

and if the second speed is greater than a speed threshold value and the third speed is less than or equal to the speed threshold value, taking the acceleration acquired in the second sampling period as the acceleration parameter.

4. The method of claim 3, wherein calculating a driving score based on the brake pedal depth parameter and the acceleration parameter comprises:

determining a depth interval of the depth parameter of the brake pedal, adding 1 to a brake count value corresponding to the depth interval, and adding 1 to a total brake count value;

determining the acceleration interval of the acceleration parameter, adding 1 to the accelerometer value corresponding to the acceleration interval, and adding 1 to the total acceleration count value;

acquiring a corresponding depth weight according to the depth interval, and acquiring a corresponding acceleration weight according to the acceleration interval;

calculating the driving score by the following formula:

wherein, Total _ grade does drive and grade, grade _ break is the brake and grades, grade _ aceleration is the acceleration and grades, k is the preset parameter, factor _ break is the depth weight, break _ counter is the brake count value that factor _ break corresponds depth interval and corresponds, Σ break _ counter is the Total count value of brake, factor _ acc is the acceleration weight, acc _ counter is the accelerometer numerical value that factor _ acc corresponds acceleration interval, Σ acc _ counter is the Total count value of acceleration.

5. The method of claim 1, wherein the method further comprises:

acquiring the driving mileage of the vehicle;

and calibrating the driving score according to the driving mileage and the driving score to obtain a first calibration score.

6. The method of claim 5, wherein the calibrating the driving score based on the mileage and the driving score comprises:

if the driving mileage is less than or equal to a preset mileage, taking the driving score as the first calibration score;

if the driving mileage is greater than the preset mileage and the driving Score is less than or equal to the preset Score, acquiring a first mileage weight corresponding to a mileage interval where the driving mileage is located, and obtaining a first calibration Score according to a formula of Score (Total _ grade +15 factor _ low), wherein Score is the first calibration Score, Total _ grade is the driving Score, and factor _ low is the first mileage weight;

if the driving mileage is greater than the preset mileage and the driving Score is greater than the preset Score, acquiring a second mileage weight corresponding to the mileage interval where the driving mileage is located, and obtaining the first calibration Score according to a formula Score (Total _ Score + (100-Total _ Score) factor _ high, wherein the factor _ high is the second mileage weight.

7. The method of claim 5, wherein the method further comprises:

acquiring a driving score of the vehicle before last power-off and recording the driving score as an initial score;

and calibrating the first calibration score according to the initial score to obtain a second calibration score.

8. The method of claim 7, wherein said calibrating said first calibration score based on said initial score comprises:

if the first calibration Score is smaller than the initial Score, and the sum of the total brake count value and the total acceleration count value is smaller than or equal to a sum threshold, acquiring a Score weight Score _ pull _ factor _ H corresponding to the Score interval of the first calibration Score, and obtaining a second calibration Score according to a formula Score ═ Score + (Score _ initial-Score) Score _ pull _ factor _ H, wherein Score' is the second calibration Score, Score is the first calibration Score, and Score _ initial is the initial Score;

if the first calibration Score is smaller than the initial Score and the sum of the total brake count value and the total acceleration count value is larger than the sum threshold, obtaining a Score weight Score _ pull _ factor _ L corresponding to the Score interval of the first calibration Score, and obtaining the second calibration Score according to a formula Score ═ Score + (Score _ initial-Score) · Score _ pull _ factor _ L.

9. A driving behavior evaluation device characterized by comprising:

the acquisition module is used for acquiring the depth, the speed and the acceleration of a brake pedal of a vehicle;

the extraction module is used for obtaining key characteristic parameters for evaluating the driving level according to the depth of the brake pedal, the vehicle speed and the acceleration, wherein the key characteristic parameters comprise a depth parameter of the brake pedal and an acceleration parameter;

and the calculating module is used for calculating a driving score according to the depth parameter of the brake pedal and the acceleration parameter.

10. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the method according to any one of claims 1-8.

11. A vehicle comprising a memory, a processor and a computer program stored on the memory, wherein the computer program, when executed by the processor, implements the method of any one of claims 1-8.