JP2004344357A - Steering characteristic analyzer and steering characteristic setting method of automobile - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a steering characteristic analyzer of an automobile capable of quantitatively reporting a pull-back operation state, and a steering characteristic setting method of the automobile. <P>SOLUTION: The analyzer is provided with: a muscle state judging means 13 for judging the muscle state of the arms of a driver; a steering state judging means 15 for judging the state of steering; a pull-back operation judging means for judging the pull-back operation state of the steering on the basis of the muscle state judged by the muscle state judging means 13 and the steering state judged by the steering state judging means 15; and a pull-back operation state reporting means 40 for reporting the pull-back operation state of the steering judged by the pull-back operation judging means. Since the pull-back operation state of the steering is reported on the basis of the muscle state of the arms of the driver and the state of the steering, whether the driver feels a steering operation stable or not is quantitatively recognized regardless of the difference of the muscle force of the drivers. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a vehicle steering characteristic analysis device and a vehicle steering characteristic setting method.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, an analysis of a steering characteristic of a vehicle is performed based on a feeling evaluation of a skilled driver.
However, according to the feeling evaluation, since the evaluation result varies depending on the variation of each driver, it is difficult to use the result of the feeling evaluation as a quantitative index.
[0003]
Therefore, as one of the methods for quantitatively performing the steering characteristic evaluation, Japanese Patent Application Laid-Open No. H11-163873 discloses detecting a myoelectric potential of a driver's arm, and calculating a negative steering power based on the detected myoelectric potential. It is disclosed that the steering characteristics are evaluated based on the negative steering power.
According to Patent Literature 1, when the direction of the steering wheel speed and the direction of the steering wheel steering force are opposite, the steering power becomes negative, and such a steering power becomes negative. Can be regarded as a state in which the driver is trying to stop the movement of the steering wheel, so that the straight running stability of the vehicle can be quantitatively evaluated based on the magnitude of the negative power.
[0004]
[Patent Document 1]
JP-A-2002-214083
[Problems to be solved by the invention]
By the way, as an evaluation index of the steering characteristic, it is also desirable to use, as an index, a steering pullback operation amount at the time of steering, in addition to the straight running stability disclosed in Patent Document 1.
This is because the driver at the time of steering finely adjusts the position of the steering by using the arm opposite to the arm that pulls and turns the steering. This is because the steering amount is too large and the driver feels that the steering is not stable.
Here, according to the present applicant, it has been found that based on the muscle state of the driver's arm, the degree to which the steering operation is felt to be unstable can be quantitatively grasped.
And it was confirmed that such a finding has a particularly high correlation with the muscle state of the extensor carpi ulna used for fine adjustment of the steering.
[0006]
In addition, since the above-described quantitative evaluation of the steering characteristics is an evaluation of a part of the steering characteristics, and it is difficult to express all the steering characteristics quantitatively, it is necessary to evaluate the steering characteristics. In some cases, high driving skills are required.
For example, a skilled driver having a high driving skill can determine a steering position of a steering wheel after steering without performing a pulling-back operation at the time of steering.
It is necessary to transmit such steering without performing the pull-back operation from a skilled driver to a new driver, but the skilled driver may not be sufficiently transmitted simply by showing verbal or driving skills.
As described above, it is required that the high skill of a skilled driver is quantitatively shown and transmitted to a new driver reliably.
[0007]
SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object to provide a vehicle steering characteristic analysis device capable of quantitatively informing a pullback operation state, which is one index of steering characteristics, and a vehicle steering system. It is to provide a characteristic setting method.
[0008]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides the following as a solution. That is, in the first configuration of the present invention, there is provided a steering characteristic analyzing apparatus for analyzing a steering characteristic of an automobile, a muscle state determining means for determining a muscle state of a driver's arm, and a steering state for determining a steering state of the steering. Determination means; pull-back operation determination means for determining a steering pull-back operation state based on the muscle state determined by the muscle state determination means and the steering state determined by the steering state determination means; And a pull-back operation state notifying means for notifying the pull-back operation state of the steering determined by the means.
According to the first configuration of the present invention, the state of the steering pull-back operation is notified based on the muscle state of the arm of the driver and the steering state of the steering. Can be quantitatively grasped as to whether or not the user feels unstable.
[0009]
In the second configuration of the present invention, there is provided a steering characteristic analyzing apparatus for analyzing a steering characteristic of an automobile, wherein a muscle state determining means for determining a muscle state of a driver's arm and a steering state determining means for determining a steering state of the steering wheel. Pull-back operation state determining means for determining a steering pull-back operation state based on the muscle state determined by the muscle state determining means and the steering state determined by the steering state determining means; A pull-back operation state notifying means for notifying the pull-back operation states of the plurality of steerings determined by the means in a comparable manner.
Here, when the feeling of the steering characteristic is evaluated, a high driving skill is required.
For example, a skilled driver having a high driving skill can determine the steering position of the steering with almost no pullback operation during steering.
Then, such steering without performing the pullback operation needs to be transmitted from a skilled driver to a new driver, but the skilled driver may not be sufficiently transmitted simply by showing verbal or driving skills.
According to the second configuration of the present invention, since a plurality of pullback operation states calculated based on the arm muscle state and the steering state are notified in a comparable manner, the pullback operation serving as an index of the driving skill is compared. can do. Therefore, since the difference in operation state between the skilled driver and the new driver can be quantitatively compared, the steering of the skilled driver can be transmitted to the new driver without fail.
[0010]
In the third configuration of the present invention, the muscle state determining means is configured to determine a muscle state of the extensor carpi ulnarisus of the driver.
Here, according to the present applicant, the muscles of the arms used in the fine adjustment of the steering are, in particular, the muscles used to bend the wrist to the palm side, and the muscle state of the extensor carpi ulnaris. Findings with a high correlation with the retraction state were obtained.
According to the third configuration of the present invention, the retraction state of the steering is determined based on the muscle state of the extensor carpi ulnarisus of the driver, so that the retraction operation state can be accurately determined.
[0011]
In a fourth configuration of the present invention, the steering characteristic analysis device includes a triceps state determination unit that determines a muscle state of a triceps muscle of a driver, and a muscle determined by the triceps state determination unit. Steering reaction force characteristic value calculating means for calculating an optimum steering reaction force characteristic value based on the state, and changing the steering characteristic based on the optimum steering reaction force characteristic value calculated by the steering reaction force characteristic value calculating means. Steering characteristic changing means, wherein the pull-back operation state determining means restricts determination of the pull-back steering state until the steering characteristic is changed by the steering characteristic changing means, and the steering characteristic is changed by the steering characteristic changing means. Then, it is configured to allow the determination of the pullback steering state.
Here, if the steering reaction force at the start of steering, that is, the weight of the steering felt by the driver at the start of steering is not appropriately set in relation to the muscle strength of the driver, it is possible to appropriately determine the pullback operation state. It cannot be done.
In other words, if the steering reaction force is too small for a driver with strong muscular strength, steering may be performed more than necessary, and the pullback operation amount may increase more than necessary. If it is too large, the retraction operation may be reduced more than necessary.
The present applicant has found out that the steering reaction force felt by the driver, that is, the degree to which the driver feels the steering operation is heavy can be quantitatively grasped based on the muscle state of the triceps.
In other words, it was found that when the driver began to feel the steering operation heavily, the triceps began to greatly act.
According to the fourth configuration of the present invention, the determination of the retraction operation state is prohibited until the steering characteristic is changed based on the muscle state of the triceps, and the steering characteristic change based on the muscle state of the triceps is performed. Thereafter, since it is configured to allow the determination of the pullback operation state, it is possible to suppress an erroneous pullback determination in a state where the relationship between the muscular strength of the driver and the steering reaction force is inappropriate.
[0012]
In a fifth configuration of the present invention, the steering characteristic analysis device includes a concentration force determination unit that determines a driver's concentration force, and the pullback operation state determination unit determines that the concentration force is high by the concentration force determination unit. In this state, the pull-back operation state is determined based on the muscle state determined by the muscle state determination unit.
Here, according to the present applicant, when the driver is not concentrated on driving, the operation of the driver's arm becomes slow and the behavior of the muscle state does not appear properly, so that the pullback operation state is appropriately determined. I learned that I could not do it.
According to the fifth configuration of the present invention, since the pullback operation state is determined based on the driver's muscle state when the concentration is high, the pullback operation state based on the muscle state can be appropriately determined.
[0013]
In the sixth configuration of the present invention, there is provided a steering characteristic analyzing method for analyzing a steering characteristic of an automobile, wherein a muscle state determining step of determining a muscle state of a driver's arm and a steering state determining step of determining a steering state of the steering wheel. A pullback operation determining step of determining a steering pullback operation state based on the muscle state determined in the muscle state determination step and the steering state determined in the steering state determination step; and a pullback operation determination step. A pull-back operation state notification step of notifying the determined steering pull-back operation state.
According to the sixth configuration of the present invention, since the steering pull-back operation state is notified based on the driver's arm muscle state and the steering state of the steering, is the driver feeling that the steering operation is not stable? Whether or not it is possible can be quantitatively grasped.
[0014]
In the seventh configuration of the present invention, there is provided a steering characteristic analysis method for analyzing a steering characteristic of an automobile, wherein a muscle state determining step of determining a muscle state of a driver's arm and a steering state determining step of determining a steering state of the steering wheel. A pullback operation state determining step of determining a steering pullback operation state based on the muscle state determined in the muscle state determination step and the steering state determined in the steering state determination step; and the pullback operation state determination. A pull-back operation state notification step is provided for notifying the pull-back operation states of the plurality of steerings determined in the steps in a comparable manner.
According to the seventh configuration of the present invention, the plurality of pull-back operation states calculated based on the arm muscle state and the steering state are notified in a comparable manner, so that the pull-back operation as an index of the driving skill is compared. can do. For example, since the difference in operation state between a skilled driver and a new driver can be quantitatively compared, the steering of the skilled driver can be transmitted to the new driver without fail.
[0015]
【The invention's effect】
ADVANTAGE OF THE INVENTION According to this invention, the pullback operation state which is one parameter | index of a steering characteristic can be notified quantitatively.
[0016]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a diagram showing an overall configuration of a steering characteristic setting system according to the present embodiment.
In FIG. 1, 1 is an evaluation vehicle, 2 is an information center, and 3 is a vehicle owned by the driver.
The evaluation vehicle 1 is, for example, a test vehicle installed in an automobile manufacturer, an automobile dealer, or the like, and is capable of determining the muscle state of the driver's arm by actually driving the driver.
The evaluation vehicle device 1 also includes a steering characteristic optimization unit 10 for calculating an optimal steering characteristic of the driver, and a steering characteristic of the steering wheel 1a based on the optimum steering characteristic calculated by the steering characteristic optimization unit 10. And a display device 40 capable of displaying myoelectric potential data.
[0017]
The steering characteristic optimizing unit 10 includes an electroencephalogram detecting means 11 for detecting a driver's electroencephalogram, a triceps detecting means 12 for detecting a myoelectric potential of a triceps muscle of the driver, and a muscle of the extensor carpi ulnaris of the driver. Detector 13 for detecting the potential of the extensor carpal extensor, a steering torque sensor 14 for detecting the steering torque of the steering wheel 1a, a steering angle sensor 15 for detecting the steering angle of the steering wheel 1a, and detecting the position of the steering wheel 1a in the height direction. Steering position sensor 16, a seat position sensor 17 for detecting a seat position, a vehicle speed sensor 18 for detecting a vehicle speed, a lateral G sensor 19 for detecting a lateral G of the vehicle, a longitudinal G sensor for detecting a G in the longitudinal direction of the vehicle 20, each detection signal detected by the yaw rate sensor 21 for detecting the yaw rate is input.
Then, the steering characteristic optimization unit 10 calculates an optimum steering characteristic for the driver based on the input detection signals, and changes the steering characteristic of the power steering device 30 based on the calculated optimum steering characteristic. It is possible to provide the calculated optimum steering characteristics to the information center 2. The specific calculation of the optimum steering characteristics will be described later.
[0018]
Further, the power steering device 30 is configured to be able to change the assist characteristic for steering by an electric motor.
[0019]
Further, the display device 40 can graphically display the myoelectric potential data of the triceps brachii and the myoelectric potential of the extensor carpi ulnaris, respectively, as described later in the description of FIGS. It has been.
Then, based on this display, the steering state of the driver can be grasped quantitatively.
[0020]
The information center 2 is capable of bidirectionally transmitting and receiving signals between the evaluation vehicle 1 and the contracted driver's vehicle 3 by radio or the like, and performs optimal steering from the evaluation vehicle 1 to the information center 1. The characteristics are provided, and various information such as traffic information collected in the information center 2 is provided from the information center 2 to the vehicle 3, and the vehicle 3 is provided in the vehicle 3 from the vehicle 3 to the information center 2. Various types of information detected by various types of sensors are provided.
Although not described in detail, the information center 2 includes a server as an arithmetic processing device, a database described below that stores various information, and a communication device for communicating with an external device via a communication circuit. I have.
Further, the information center 2 has an optimum steering characteristic storage means 2a for storing the optimum steering characteristic provided from the steering characteristic optimization unit 10 for each driver, and an optimum steering characteristic stored in the optimum steering characteristic storage means 2a. Is provided to the steering control unit 40 of the automobile 3 to be described later.
[0021]
The vehicle 3 is a vehicle owned by the driver whose optimum steering characteristics have been calculated in the evaluation vehicle 1, and includes a steering control unit 50, a power steering device 60, and a personal authentication device 70.
The steering control unit 50 receives the optimum steering characteristics corresponding to the individual who has been authenticated by the personal authentication device 70 from the optimum steering characteristics providing means 2b of the information center 2, and based on the provided optimum steering characteristics, the power steering device 60. Is configured to change the steering characteristics.
[0022]
Here, the relationship between the muscle state of the driver's arm and the steering characteristics will be described.
First, the triceps brachii is described.
FIG. 2A is a diagram illustrating the relationship between the steering angle and the steering force for each of the four patterns having different steering reaction forces. FIG. 2B is a diagram illustrating the relationship between the steering angle and the steering angle within 20 degrees for the four patterns having different steering reaction forces. It is the figure which showed each myoelectric potential change of the triceps of the upper arm in the state which repeated steering to the left and right.
[0023]
In FIG. 2A, a is a steering characteristic 1 indicating the steering characteristic having the largest steering reaction force, b is a steering characteristic 2 indicating a steering characteristic having the second largest steering reaction force, and c is a steering characteristic having the third largest steering reaction force. The steering characteristics 3 and d showing the large steering characteristics are the steering characteristics 4 showing the steering characteristics with the smallest steering reaction force.
Then, as shown by the data b, c, and d in FIG. 2B, in the steering characteristics 2 to 4, the myoelectric potential of the triceps is near 0.012 mV, and the myoelectric potential does not increase. On the other hand, in the steering characteristic 1, the muscle potential of the triceps muscle is increased to 0.016 mV or more, and the triceps muscle is largely activated during steering. This is because, in the steering characteristic 1, since the steering reaction force is large, the triceps is largely active during steering.
Therefore, when the myoelectric potential of the triceps brachii is approximately 0.016 mV or more, it can be evaluated that the driver starts to feel heavy steering operation.
As described above, the steering operation weight of the driver can be quantitatively indicated based on the myoelectric potential of the triceps.
[0024]
Next, the muscle state of the extensor carpi ulnaris is described.
FIG. 3A shows the relationship between the steering angle and the steering force for four patterns with different hysteresis, and FIG. 3B shows the relationship between the steering angle and the steering force within 20 deg for the four patterns with different steering reaction forces. FIG. 8 is a diagram showing changes in myoelectric potential of the extensor carpi ulnaris of the left arm in a state where the left arm is repeatedly steered left and right.
[0025]
In FIG. 3A, the width indicated by d is the steering characteristic 5 indicating the steering characteristic having the largest hysteresis, the width indicated by e is the steering characteristic 6 indicating the steering characteristic having the largest hysteresis, and the width indicated by f is the third. The steering characteristic 7 indicates a steering characteristic having a large hysteresis, and the width indicated by g is a steering characteristic 8 indicating a steering characteristic having a minimum hysteresis (zero hysteresis).
Then, as shown by d and e in FIG. 3B, in the steering characteristics 5 and 6, the myoelectric potential of the ulnar carpal extensor is relatively small, whereas in the steering characteristics 7 and 8, the ulnar hand is increased. The myoelectric potential of the root extensor is large, indicating that the steering pullback operation has a large steering characteristic. This is because the hysteresis width is too small and the steering angle is sensitive to steering. Therefore, it can be evaluated that the steering characteristic 5 or the steering characteristic 6 in which the muscle potential of the ulnar carpal extensor is small and the pullback operation is reduced is an appropriate hysteresis width.
As described above, based on the myoelectric potential of the extensor carpi ulnaris, the steering pullback operation of the driver can be quantitatively indicated.
[0026]
Next, the processing for calculating the optimum steering characteristic by the steering characteristic optimizing unit 10 of the evaluation vehicle 1 will be specifically described based on the flowchart of FIG.
In step S1 of FIG. 4, a base steering characteristic is set based on information about the driver, such as the driver's height, gender, and preference for the steering characteristic. This is because the steering force characteristics shown in FIG. 2A differ depending on the driver's muscular strength and the like, and it is determined according to the difference whether the base steering characteristics and the triceps have started to largely activate. Set the judgment value to perform.
Subsequently, in step S2, a characteristic correction value is set based on the seating posture of the driver with respect to the seat based on the seat position and the steering position. This is because the muscle fatigue increases as the seat position is farther from the steering, and the muscle fatigue increases as the steering position increases, so that the base steering characteristics and the determination value set in step S1 are corrected to perform these corrections. Set the correction value to be used.
In step S3, the steering characteristic is provisionally set based on the base steering characteristic set in step S1 and the characteristic correction value set in step S2.
[0027]
Next, in step S4, it is determined whether the vehicle speed is equal to or higher than a predetermined vehicle speed (for example, 80 km / h).
When YES is determined in the step S4, the process proceeds to a step S5 to determine whether or not the steering angle is within a predetermined angle (for example, 20 deg).
When YES is determined in the step S5, the process proceeds to a step S6 to determine whether or not the steering speed is equal to or lower than a predetermined speed.
When YES is determined in step S6, that is, when the vehicle speed is high and the steering angle is steered with a relatively small steering speed, the steering situation is such that the lane changes on a highway, and the steering feeling and the upper arm Since the correlation with the triceps and the correlation between the steering pullback and the extensor carpi ulnaris are high, the process goes to step S7 to collect the myoelectric potential data of the triceps brachii and that the data is being collected. Notify the driver.
When any one of the determinations in steps S4 to S6 is determined to be NO, the process returns without collecting myoelectric potential data of the triceps brachii.
[0028]
Subsequently, in step S8, it is determined whether or not the driver is concentrated on driving, and if the determination is YES, the process proceeds to step S9. Note that the determination in step S8 can be made based on, for example, the brain waves of the driver.
In step S9, the myoelectric potential data of the triceps brachii collected in step S7 is stored in the memory 10a of the steering characteristic optimization unit 10.
If NO is determined in step S8, that is, if the driver is not concentrated on driving, the accuracy of determination of the triceps of the driver is reduced. A power drop warning is issued, and the process returns without storing the myoelectric potential data of the triceps brachii collected in step S7.
[0029]
Subsequently, in step S11, it is determined whether or not a predetermined amount of collected data, that is, a data amount capable of displaying the characteristics shown in FIG. 2 has been collected. If YES is determined, the process proceeds to step S12.
In step S12, it is determined whether the steering characteristic determination has been completed, that is, the myoelectric potential data of the triceps muscles collected in step S7 is equal to or greater than the determination value, and the triceps muscles start to act significantly during steering. Is determined.
When NO is determined in step S12, the process proceeds to step S13, in which the steering characteristic (steering reaction force value) is changed by a predetermined value, and the process returns. The steering characteristic (steering reaction force value) is changed by a predetermined value until the myoelectric potential data of the triceps brachii is equal to or greater than the determination value.
[0030]
If YES is determined in the step S13, the process proceeds to a step S14, in which the myoelectric potential data of the triceps brachii collected for each steering reaction force is displayed on the display device 40 in a comparable manner. The display will be as shown in FIG.
Subsequently, in step S15, a steering reaction force smaller than the steering reaction force at which the myoelectric potential data of the triceps muscle is equal to or greater than the determination value is set as the optimum steering reaction force.
[0031]
Next, in step S16, the myoelectric potential data of the extensor carpi ulnaris are collected, and the driver is notified that the data is being collected.
In step S17, similarly to step S8, it is determined whether or not the driver is concentrated on driving. If the determination is YES, the process proceeds to step S18.
In step S18, the myoelectric potential data of the extensor carpi ulnaris collected in step S17 is stored in the memory 10a of the steering characteristic optimization unit 10.
When NO is determined in step S17, that is, when the driver is not concentrated on driving, the accuracy of determination of the extensor carpi ulnaris of the driver is reduced. Then, a concentration drop warning is given, and the process returns without storing the myoelectric potential data of the extensor carpi ulnaris collected in step S16.
[0032]
Subsequently, in step S19, it is determined whether or not a predetermined amount of collected data, that is, a data amount capable of displaying the characteristics shown in FIG. 3 has been collected. If the determination is YES, the process proceeds to step S20.
In step S20, it is determined whether or not the steering characteristic determination is completed, that is, the myoelectric potential data of the ulnar carpal extensor collected in step S167 is equal to or greater than the determination value, and the activity of the ulnar carpal extensor during steering is determined. It is determined whether or not the pull-back operation is large.
When NO is determined in step S20, the process proceeds to step S21, the steering hysteresis width is changed by a predetermined value, and the process returns. Then, the steering hysteresis width is changed by a predetermined value until the myoelectric potential data of the ulnar carpal extensor is equal to or greater than the determination value.
[0033]
If YES is determined in the step S20, the process proceeds to a step S22, in which the EMG data of the extensor carpi ulnaris collected for each steering hysteresis width is displayed on the display device 40 in a comparable manner. The display will be as shown in FIG.
Subsequently, in step S23, a steering hysteresis width smaller than the steering hysteresis width in which the myoelectric potential data of the extensor carpi ulnaris is equal to or greater than the determination value is set as the optimal steering hysteresis width.
[0034]
In step S24, the following performance is grasped based on the relationship between the steering of the steering wheel 1a and the behavior of the vehicle such as the lateral G and the yaw rate, and a driver whose steering speed is always slow and the behavior of the vehicle greatly appears with respect to the steering is determined. In other words, a correction value for correcting the steering reaction force value to be small and the steering characteristics to be lightened is set.
Subsequently, in step S25, the optimum steering characteristics are finally set based on the steering reaction force value set in step S15, the steering hysteresis width set in step S23, and the correction value set in step S24.
In step S26, the optimum steering characteristics for each driver are stored in the memory 10a of the steering characteristics optimization unit 10 in association with the ID of each driver, and in step S27, the optimum steering characteristics are provided to the information center. .
[0035]
Next, the optimum steering characteristic changing process by the steering characteristic unit 50 of the automobile 3 will be specifically described based on the flowchart of FIG.
In step S30, it is determined whether the ignition switch is turned on.
When YES is determined in the step S30, the process proceeds to a step S31, and it is determined whether or not the ignition switch was previously turned off.
When YES is determined in step S31, that is, when the ignition switch is turned ON from OFF for the first time, the process proceeds to step S32.
In step S32, the optimum steering characteristics stored corresponding to the driver recognized by the personal authentication device 70 are obtained from the information center 2.
In step S33, the steering characteristics of the power steering device 60 are set based on the optimum steering characteristics obtained in step S32, and in the following step S34, the power steering device 60 is controlled based on the optimum steering characteristics set in step S33. I do.
When it is determined NO in step S31, the process proceeds to step S34 without performing the processes in steps S32 and S33.
When the determination is NO in step S30, the process returns without performing any processing.
[0036]
As described above, according to the present embodiment, when the steering angle is equal to or less than the predetermined angle and the steering speed is equal to or less than the predetermined value, the state of the pullback operation of the steering is notified based on the state of the extensor carpi ulnaris. Therefore, it is possible to quantitatively grasp whether or not the driver feels that the steering operation is not stable regardless of the difference in the muscle strength of the driver.
Further, as shown in FIG. 3, since a plurality of pull-back operation states are notified in a comparable manner, the pull-back operation serving as an index of the driving skill can be compared. Therefore, since the difference in operation state between the skilled driver and the new driver can be quantitatively compared, the steering of the skilled driver can be reliably transmitted to the new driver.
In addition, since the pullback state of the steering is determined based on the muscle state of the extensor carpi ulnarisus of the driver, the pullback operation state can be accurately determined.
In addition, until the steering characteristic is changed based on the muscle state of the triceps, the determination of the pullback operation state is prohibited, and after the steering characteristic is changed based on the muscle state of the triceps, determination of the pullback operation state is permitted. Therefore, in a state where the relationship between the muscle force of the driver and the steering reaction force is inappropriate, it is possible to suppress erroneous pull-back determination.
In addition, since the pullback operation state is determined based on the driver's muscle state when the concentration power is high, the pullback operation state based on the muscle state can be appropriately determined.
[0037]
In the present embodiment, an example has been described in which the steering hysteresis width is calculated only when the steering angle is equal to or smaller than a predetermined angle and the steering speed is equal to or smaller than a predetermined value. May be calculated, and at this time, the steering hysteresis width may be corrected based on the steering angle and the steering speed.
[0038]
In the present embodiment, an example has been described in which the optimum steering characteristics are stored in the optimum steering characteristics storage means 2a of the information center 2. However, the optimum steering characteristics may be stored in the steering control unit 50 of the automobile 3.
In this case, as shown in FIG. 6, the steering control unit 50 of the driver's automobile 3 includes an optimum steering characteristic storage unit 50a and an optimum steering characteristic for switching the optimum steering characteristic according to the driver determined by the personal authentication device 70. Switching means 50b.
[0039]
Further, in the present embodiment, the muscular state of the driver is determined by the triceps brachii detecting means 12 provided in the evaluation vehicle 3, the ulnar carpal extensor detecting means for detecting the myoelectric potential of the ulnar carpal extensor. Although the example determined by 13 is shown, in addition, the triceps detection means 12 provided in a car manufacturer or a car dealer and provided in a simulation device capable of simulating the driving of a virtual car by driving a driver, The determination may be made by the carpal extensor detection unit 13.
[0040]
Further, in the present embodiment, an example has been shown in which the optimum steering characteristics are provided between the evaluation vehicle 1 and the driver's vehicle 3 via the information center 1, but the evaluation vehicle 1 is directly provided without passing through the information center 1. , The driver 3 may be provided with an optimum steering characteristic.
[0041]
Further, in the present embodiment, an example in which the muscle potential of the triceps is directly detected as the determination of the muscle state of the triceps, but in addition, the muscle potential of the triceps is detected from the muscle potential of the biceps. May be estimated.
[Brief description of the drawings]
FIG. 1 is a diagram showing an overall configuration of a steering characteristic setting system according to an embodiment.
FIG. 2 is a diagram showing myoelectric potential characteristics of the triceps brachii.
FIG. 3 is a view showing myoelectric potential characteristics of the extensor carpi ulnaris.
FIG. 4 is a flowchart illustrating an optimum steering characteristic calculation process performed by a steering characteristic optimization control unit of an evaluation vehicle according to the embodiment;
FIG. 5 is a flowchart showing a steering control process by a driver's automobile steering control unit according to the embodiment;
FIG. 6 is a diagram illustrating a configuration of an automobile of a driver according to another embodiment.
[Explanation of symbols]
1: Evaluation vehicle 2: Information center 2a: Optimal steering characteristic storage means 2b: Optimal steering characteristic providing means 10: Steering optimization control unit 11: EEG detection means (concentration determination means)
12: Upper triceps detection means (muscle state determination means)
13: ulnar carpal extensor detection means (muscle state determination means)
30, 60: power steering device 40: display device 50: steering control unit 50a: optimal steering characteristic storage means 50b: optimal steering characteristic switching means

Claims (7)

A steering characteristic analysis device for analyzing a steering characteristic of an automobile,
Muscle state determining means for determining a muscle state of the arm of the driver;
Steering state determining means for determining a steering state of the steering;
Pullback operation determination means for determining a steering pullback operation state based on the muscle state determined by the muscle state determination means and the steering state determined by the steering state determination means,
A steering characteristic analyzing device for a vehicle, comprising: a pull-back operation state notifying means for notifying a steering pull-back operation state determined by the pull-back operation determining means. A steering characteristic analysis device for analyzing a steering characteristic of an automobile,
Muscle state determining means for determining a muscle state of the arm of the driver;
Steering state determining means for determining a steering state of the steering;
Pullback operation state determination means for determining a steering pullback operation state based on the muscle state determined by the muscle state determination means and the steering state determined by the steering state determination means,
A steering characteristic analysis device for a vehicle, comprising: a pull-back operation state notifying unit that notifies a comparison of the pull-back operation states of the plurality of steering wheels determined by the pull-back operation state determining unit. The vehicle steering characteristic analyzing apparatus according to claim 1, wherein the muscle state determining unit determines a muscle state of the extensor carpi ulnaris of the driver. The steering characteristic analysis device,
Triceps state determination means for determining the muscle state of the triceps of the driver,
Steering reaction force characteristic value calculation means for calculating an optimum steering reaction force characteristic value based on the muscle state determined by the triceps state determination means,
A steering characteristic changing unit that changes a steering characteristic based on the optimum steering reaction characteristic value calculated by the steering reaction characteristic value calculating unit;
The pull-back operation state determining means restricts the determination of the pull-back steering state until the steering characteristic is changed by the steering characteristic changing means, and after the steering characteristic is changed by the steering characteristic changing means, the pull-back steering state is changed. The apparatus according to claim 3, wherein the determination is permitted. The steering characteristic analysis device includes a concentration force determination unit that determines a concentration force of the driver,
The pull-back operation state determining means determines a pull-back operation state based on the muscle state determined by the muscle state determining means in a state where the concentration power is determined to be high by the concentration power determining means. An apparatus for analyzing steering characteristics of an automobile according to any one of claims 1 to 4. A steering characteristic analysis method for analyzing a steering characteristic of an automobile,
A muscle state determination step of determining a muscle state of the driver's arm;
A steering state determination step of determining a steering state of the steering;
A pullback operation determination step of determining a steering pullback operation state based on the muscle state determined by the muscle state determination step and the steering state determined by the steering state determination step;
A pull-back operation state notifying step of notifying the pull-back operation state of the steering wheel determined in the pull-back operation determining step. A steering characteristic analysis method for analyzing a steering characteristic of an automobile,
A muscle state determination step of determining a muscle state of the driver's arm;
A steering state determination step of determining a steering state of the steering;
A pullback operation state determination step of determining a pullback operation state of the steering based on the muscle state determined by the muscle state determination step and the steering state determined by the steering state determination step;
A method for analyzing steering characteristics of a vehicle, comprising: a pull-back operation state notification step of comparingably indicating the pull-back operation states of the plurality of steering wheels determined in the pull-back operation state determination step.

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