JP2004345482A - Steering characteristic setting system for automobile - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a steering characteristic setting system for an automobile whereby an optimum steering characteristic can be set regardless of the difference of the muscular strength of a driver. <P>SOLUTION: This system is provided with muscle state determination devices 12 and 13 each determining a muscle state of an arm of the driver in an automobile driving state, an optimum steering characteristic calculating device 10 for calculating the optimum steering characteristic for the driver of which the muscle state is determined based on the muscle state determined by the muscle state determination devices 12 and 13, and a steering characteristic changing device 10 for giving the optimum steering characteristic calculated by the optimum steering characteristic calculating device 10 to a steering control unit 50 provided on the automobile 3 of the driver and changing the steering characteristic set in the control unit 50. Therefore, the optimum characteristic is calculated based on the muscle state of the drier, the calculated optimum steering characteristic is transmitted to the steering control unit 50 of the automobile 3 of the driver, and the steering characteristic is changed, and thereby the optimum steering characteristic in accordance with the difference of the muscular strength of the driver can be set. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a vehicle steering characteristic setting system.
[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, in addition to the straight running stability disclosed in Patent Document 1, it is also desirable to use a steering reaction force at the start of steering as an index.
This is because the steering reaction force at the start of steering, that is, the weight of the steering operation felt by the driver at the start of steering affects the driver.
Further, as an evaluation index of other steering characteristics, it is desired that a steering pullback operation at the time of steering is also used as an index.
This is to fine-tune the steering position with the arm opposite to the arm that pulls and turns the steering during steering, but if this steering pullback operation is large, the driver feels that the steering is not stable and affects the driver Is to exert.
These effects have different feelings depending on the difference in the muscular strength of the driver.
Here, according to the present applicant, it has been found that the weight of the steering operation felt by the driver and the stability of the steering operation can be quantitatively grasped based on the muscle state of the arm of the driver.
For example, we found that the weight of the steering operation is correlated with the muscle state of the triceps of the driver, and the stability of the steering operation is correlated with the muscle state of the extensor carpi ulnaris of the driver. It is a thing.
After the evaluation of the steering characteristics, it is desired to set the steering characteristics to the optimum steering characteristics according to each driver.
[0006]
The present invention has been made in view of the above problems, and an object of the present invention is to provide an automobile steering characteristic setting system capable of setting an optimal steering characteristic regardless of a difference in driver's muscular strength. It is in.
[0007]
[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 setting system for setting a steering characteristic of a vehicle, wherein the muscle state determining device determines a muscle state of a driver's arm in a vehicle driving state, and the muscle state determining device. An optimal steering characteristic calculating device that receives a signal related to the muscle state determined by the above, and calculates an optimal steering characteristic for the driver whose muscle state is determined based on the signal, and a signal calculated by the optimal steering characteristic calculating device. A steering characteristic changing device that is provided in the vehicle of the driver and transfers the optimum steering characteristic to a steering control unit that controls the steering characteristic of the vehicle to change the steering characteristic set in the control unit. It is.
According to the first configuration of the present invention, the optimum steering characteristic is calculated based on the muscle state of the driver, the calculated optimum steering characteristic is provided to the steering control unit of the vehicle of the driver, and the steering characteristic is changed. Therefore, it is possible to set an optimum steering characteristic according to the difference in the muscular strength of the driver.
[0008]
In the second configuration of the present invention, the muscle state determination device is configured to be provided in a simulation device that simulates a running state of a virtual vehicle based on a driving operation of a driver.
It is not realistic to provide a means for detecting a muscle state of each driver's vehicle when determining the muscle state of the driver, because the cost of the vehicle also increases.
Therefore, according to the applicant, a simulation device capable of detecting a streak state is installed in an automobile manufacturer or a car dealer, and a knowledge that can detect the streak state of each driver by having each driver use the simulation device is provided. I found it.
According to the second configuration of the present invention, since the muscle state of the driver can be determined by the muscle state determination means provided in the simulation device, the muscle state of the arm of each driver can be suppressed while suppressing an increase in vehicle cost. Can be determined.
[0009]
In the third configuration of the present invention, the muscle state determination device is configured to be provided in an evaluation vehicle.
It is not realistic to provide a means for detecting a muscle state of each driver's vehicle when determining the muscle state of the driver, because the cost of the vehicle also increases.
Therefore, according to the present applicant, a finding has been found in which, by disposing an evaluation vehicle capable of determining a muscle state in an automobile dealer and having the evaluation vehicle test drive, the muscle state of each driver can be detected.
According to the third configuration of the present invention, the muscle state of the driver can be determined by the muscle state determination means provided in the evaluation vehicle. Therefore, the muscle of the arm of each driver can be suppressed while suppressing an increase in vehicle cost. The condition can be detected.
[0010]
In a fourth configuration of the present invention, the driver's automobile includes:
Storage means for storing steering characteristics corresponding to a plurality of different drivers;
Driver identification means for identifying a driver who actually drives a car among a plurality of drivers;
Steering characteristic switching means for switching the steering characteristic according to the driver determined by the driver identification means.
For example, when a plurality of drivers drive the same automobile like a family, the muscle strength of the arm is different for each driver. Therefore, it is necessary to store the optimal steering characteristics corresponding to each driver. .
According to the fourth configuration of the present invention, the steering characteristics are switched according to the driver determined by the driver identification means, so that the optimum steering characteristics corresponding to each driver can be set.
[0011]
In the fifth configuration of the present invention, the optimum steering characteristic calculation device provides the calculated optimum steering characteristic to an information center, and the information center provides the optimum steering characteristic provided by the optimum steering characteristic calculation device. An optimal steering characteristic storing means for storing the characteristic, and an optimal steering characteristic transferring means for providing the steering characteristic stored in the optimal steering characteristic storing means to the control unit of the automobile of the driver are provided.
Since the storage capacity of the control unit of the vehicle is limited, the steering characteristics may not be sufficiently stored when the number of drivers that need to be stored increases.
By the way, in recent years, it has become possible to communicate with a car navigation system, and an information center capable of providing various kinds of information such as traffic information to the car navigation system is becoming widespread. In addition to providing information, it is also possible to register information from contracted cars.
According to the fifth configuration of the present invention, since the optimum steering characteristics are stored in the information center, many optimum steering characteristics can be stored without being limited by the storage capacity of the control unit provided in the vehicle. .
[0012]
【The invention's effect】
According to the present invention, it is possible to set an optimum steering characteristic according to a difference in driver's muscle strength.
[0013]
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.
[0014]
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.
[0015]
Further, the power steering device 30 is configured to be able to change the assist characteristic for steering by an electric motor.
[0016]
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.
[0017]
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.
[0018]
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.
[0019]
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.
[0020]
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.
[0021]
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.
[0022]
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.
[0023]
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.
[0024]
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.
[0025]
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.
[0026]
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.
[0027]
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 value smaller than the steering reaction force value at which the myoelectric potential data of the triceps brachii is greater than or equal to the determination value is set as the optimum steering reaction force.
[0028]
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.
[0029]
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.
[0030]
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.
[0031]
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. .
[0032]
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.
[0033]
As described above, according to the present embodiment, the optimum steering characteristic is calculated based on the muscle state of the driver, and the calculated optimum steering characteristic is transferred to the steering control unit 50 of the vehicle 3 of the driver, Since the steering characteristics are changed, it is possible to set the optimum steering characteristics according to the difference in the muscular strength of the driver.
In particular, since the steering reaction force is set based on the myoelectric potential of the triceps, the optimum steering weight according to the driver can be set.
Further, since the steering hysteresis width is set based on the myoelectric potential of the extensor carpi ulnaris, the amount of pullback operation can be set appropriately.
Further, since the steering reaction force is calculated based on the muscle state of the triceps determined when the driver is concentrated on driving, the steering reaction force characteristic accompanying the decrease in the determination accuracy of the muscle state of the triceps is reduced. The deviation of the value can be suppressed.
In addition, since the steering hysteresis width is calculated based on the muscle state of the extensor carpi ulnaris determined when the driver is concentrating on driving, the accuracy of determination of the muscle state of the extensor carpi ulnaris is reduced. The deviation of the steering hysteresis width can be suppressed.
In addition, the muscle state of the driver can be determined by the triceps brachii detecting means 12 and the ulnar carpal extensor detecting means 13 which detect the myoelectric potential of the extensor carpi ulnaris, which are provided in the evaluation vehicle 3. Therefore, it is possible to detect the muscle state of the arm of each driver while suppressing an increase in vehicle cost.
Further, since the steering characteristics are switched according to the driver determined by the personal authentication device 70, the optimum steering characteristics corresponding to each driver can be set.
Further, since the optimum steering characteristics are stored in the optimum steering characteristics storage means 2a of the information center 2, it is possible to store many optimum steering characteristics without being limited by the storage capacity of the steering control unit 50 provided in the automobile 3. Can be.
[0034]
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.
[0035]
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.
[0036]
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.
[0037]
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 (optimum steering characteristic calculation device, steering characteristic change device)
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: optimum steering characteristic storage means 50b: optimum steering characteristic switching means 70: personal authentication device (driver identification means)

Claims (5)

A steering characteristic setting system for setting a steering characteristic of an automobile,
A muscle state determination device that determines a muscle state of the driver's arm in a driving state of the automobile;
An optimum steering characteristic calculation device that receives a signal related to the muscle state determined by the muscle state determination device and calculates an optimum steering characteristic for the driver based on the signal;
The optimum steering characteristics calculated by the optimum steering characteristics calculation device are provided to a steering control unit provided in the driver's vehicle and controlling the steering characteristics of the vehicle to change the steering characteristics set in the steering control unit. A steering characteristic setting system for an automobile, comprising: The vehicle steering characteristic setting system according to claim 1, wherein the muscle state determination device is provided in a simulation device that simulates a running state of a virtual vehicle based on a driving operation of a driver. The vehicle steering characteristic setting system according to claim 1, wherein the muscle state determination device is provided in an evaluation vehicle. In the driver's car,
Storage means for storing steering characteristics corresponding to a plurality of different drivers;
Driver identification means for identifying a driver who actually drives a car among a plurality of drivers;
4. The steering characteristic setting system according to claim 1, further comprising: a steering characteristic switching unit configured to switch a steering characteristic according to the driver identified by the driver identification unit. The optimal steering characteristics calculation device provides the calculated optimal steering characteristics to the information center,
The information center is an optimal steering characteristic storage unit that stores an optimal steering characteristic provided by the optimal steering characteristic calculation device,
The vehicle according to any one of claims 1 to 4, further comprising: an optimum steering characteristic providing unit configured to provide the steering characteristic stored in the optimum steering characteristic storage unit to a control unit of the vehicle of the driver. Steering characteristic setting system.

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