JP2010256292A - Evaluation method and evaluation device of vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an evaluation method and evaluation device of vehicle capable of properly and quantitatively evaluating the rolling sensation of the turning of a vehicle. <P>SOLUTION: The evaluation method of the vehicle includes a step of measuring the muscle activity for a right and left pair of at least one from among the skeletal muscles involved in the postural maintenance of an occupant in the vehicle running in a predetermined condition; a step of calculating an simultaneous activity quantity representing the feature of the waveform of the measured muscle activity; and a step of evaluating the rolling sensation of the vehicle by this simultaneous activity quantity. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a vehicle rolling feeling evaluation method and a vehicle evaluation apparatus, which are one of the evaluation items of riding comfort, and in particular, the rolling feeling of the vehicle based on muscle activity related to maintaining the posture of the occupant's head. The present invention relates to a vehicle evaluation method and a vehicle evaluation device that appropriately evaluate the vehicle.

Currently, various matters are evaluated regarding the ride comfort of automobiles (vehicles). Of this ride, there is a feeling of rolling. This feeling of rolling refers to good or bad sensation that the head is shaken in the lateral direction due to roll motion or lateral motion generated in the vehicle due to a disturbance such as a road surface when traveling straight ahead. The state in which the feeling of rolling is preferable refers to a case where the feeling of shaking is generally small.
The feeling of rolling is caused by an irregular road surface or the like even when the vehicle is traveling straight, and is particularly noticeable in a vehicle having a high center of gravity such as a minivan or SUV (Sports Utility Vehicle).
However, this rolling feeling is difficult to predict because the influence of vehicle characteristics such as roll rigidity, roll damping rate, center of gravity height, and wheel rate is complicated.

Currently, the analysis of the relationship between the electromyogram of the left and right sternocleidomastoid muscles contributing to the stabilization of the head and the acceleration and jerk of the vehicle has been made (see Non-Patent Document 1). In Non-Patent Document 1, assuming that the electromyogram of the sternocleidomastoid muscle is approximated by a linear sum of acceleration (inertial force) and jerk of the vehicle, the approximation of the electromyogram of the sternocleidomastoid muscle is performed. Quantitatively determined.
This Non-Patent Document 1 describes the change in the correspondence between the longitudinal acceleration and jerk of the vehicle and the addition average waveform of the muscle activity of the left and right sternocleidomastoid muscles of the driver's neck, It is suggested to suggest a possible relationship.

Yoshiaki Iwamoto, Daisuke Umezu, Shigeru Ozaki, “Evaluation of car driver sensibility using electromyogram”, Preprint of the 10th Kansei Engineering Conference, 2008

As described above, in Non-Patent Document 1, the relationship between the longitudinal acceleration and the electromyogram of the sternocleidomastoid muscle that contributes to the stabilization of the head has been studied. Has not been studied at all. At present, there is no quantitative evaluation method for rolling feeling. For this reason, the rolling feeling is mainly evaluated by sensory evaluation.
However, sensory evaluation greatly depends on individual differences among the evaluators (panelists), the evaluator's own health condition, or various environmental conditions. For this reason, variation may occur in the result of the rolling feeling obtained in the sensory evaluation. Furthermore, sensory evaluation has problems such as many restrictions on experimental procedures.

  An object of the present invention is to provide a vehicle evaluation method and a vehicle evaluation device that can eliminate the problems based on the conventional technology and can appropriately and quantitatively evaluate the rolling feeling of the vehicle.

In order to achieve the above object, a first aspect of the present invention provides a pair of left and right muscles for at least one of skeletal muscles related to maintaining the posture of the head of an occupant of a vehicle traveling under predetermined traveling conditions. A step of measuring an activity; a step of calculating a simultaneous activity amount representing characteristics of the waveform of the measured muscle activity; and a step of evaluating a rolling feeling of the vehicle by the simultaneous activity amount. A vehicle evaluation method is provided.
In the present invention, the evaluation of the rolling feeling may be performed by a driver as long as it is an occupant riding the vehicle, or the non-driver, that is, the evaluation of rolling feeling may be evaluated by a passenger. Good.

  In the present invention, it is preferable that the simultaneous activity amount is calculated based on muscle activities of left and right skeletal muscles related to maintaining the posture of the occupant's head.

Further, in the present invention, before the step of evaluating the rolling feeling of the vehicle, it further includes a step of determining whether or not the vehicle is substantially straight.
In the step of determining that the vehicle is in a substantially straight traveling state, if it is determined that the vehicle is in a substantially straight traveling state, the vehicle rolls according to the simultaneous activity amount in the step of evaluating the rolling feeling of the vehicle. It is preferable to evaluate the feeling.
Furthermore, in the present invention, in the step of determining that the vehicle is in a substantially straight traveling state, the deviation of the trend component of the left and right muscle activity in the skeletal muscle of the occupant selected as a pair of left and right is obtained, and this deviation is When it is within the predetermined range, it is preferable to determine that the vehicle is in a substantially straight traveling state.

In the present invention, the method further includes a step of determining whether the longitudinal speed of the vehicle is substantially constant before the step of evaluating the rolling feeling of the vehicle, wherein the longitudinal speed is substantially constant. In the step of evaluating the rolling feeling of the vehicle, it is preferable to evaluate the rolling feeling of the vehicle based on the simultaneous activity amount.
In the present invention, the skeletal muscle whose muscle activity is measured is preferably at least one of the sternocleidomastoid muscle, the upper part of the trapezius, the temporal muscle, and the head plate muscle. .

  A second aspect of the present invention is a muscle activity measuring means for measuring a pair of left and right muscle activities for at least one of skeletal muscles related to posture maintenance of a head of a passenger of a vehicle traveling under a predetermined traveling condition. And a feature amount calculating means for calculating a simultaneous activity amount representing a feature of muscle activity information measured by the muscle activity measuring means, and a vehicle roll based on the simultaneous activity amount calculated by the feature amount calculating means. The present invention provides a vehicle evaluation apparatus including an evaluation unit that evaluates feeling.

Sensory evaluation of the feeling of rolling is difficult to evaluate with a general driver, and can only be properly evaluated by a specialist such as a test driver.
However, in the present invention, when maintaining the posture of the head against the roll generated in the vehicle, the muscle activity such as muscle contraction is measured for the pair of left and right muscles, and the amount of simultaneous activity is obtained and used. Therefore, the evaluator can appropriately and quantitatively evaluate the rolling feeling regardless of a test driver or a general driver.

It is a mimetic diagram showing the evaluation device of vehicles concerning the embodiment of the present invention. (A) is a graph showing an example of a signal waveform of myoelectric potential of skeletal muscle when traveling on a flat road, with myoelectric potential on the vertical axis and time on the horizontal axis, and (b) on the vertical axis. It is a graph which shows an example of the signal waveform of the myoelectric potential and the myoelectric potential of the skeletal muscle when traveling along an irregular road, taking time on the horizontal axis. (A) And (b) is a schematic diagram which shows the example of the attachment position of the myoelectric sensor to the skeletal muscle from which the muscle activity is measured in the vehicle evaluation apparatus which concerns on embodiment of this invention, and its skeletal muscle. (A) is a graph showing an example of a signal waveform of the myoelectric potential of the left and right skeletal muscles with the myoelectric potential on the vertical axis and time on the horizontal axis, and (b) is the myoelectric potential on the vertical axis and the horizontal axis. It is a graph which shows an example of the signal waveform of the myoelectric potential of the left and right skeletal muscles taking time, (c) is the myoelectric potential signal waveform of the left and right skeletal muscles taking the time on the vertical axis and the horizontal axis. It is a graph which shows an example. It is a flowchart of the evaluation method by the vehicle evaluation apparatus which concerns on embodiment of this invention. (A) is a graph showing the result of the simultaneous activity amount of five test drivers, with the vertical axis representing the simultaneous activity amount and the horizontal axis representing the specifications A, B, and C, and (b) the vertical axis. 5 is a graph showing the results of sensory evaluation of five test drivers, with sensory evaluation (score) taken on the horizontal axis and specifications A, B and C taken on the horizontal axis. (A) is a graph showing the results of the simultaneous activity amount of 20 general adult men, with the vertical axis indicating the simultaneous activity amount and the horizontal axis indicating the specifications A, B and C, and (b) It is a graph which shows the result of sensory evaluation of 20 general adult men, with the sensory evaluation (score) on the axis and the specifications A, B and C on the horizontal axis.

Hereinafter, a vehicle evaluation method and a vehicle evaluation device according to the present invention will be described in detail based on preferred embodiments shown in the accompanying drawings.
FIG. 1 is a schematic diagram showing a vehicle evaluation apparatus according to an embodiment of the present invention.

The evaluation device 10 shown in FIG. 1 measures a pair of left and right muscle activities for at least one of the skeletal muscles related to the posture maintenance of the head 102 of the occupant 100, and from these muscle activities, the characteristics of the waveform of the muscle activity are determined. The amount of simultaneous activity to be expressed is obtained, and the above-mentioned rolling feeling is evaluated in the riding comfort of the vehicle based on the amount of simultaneous activity. The state in which the feeling of rolling is preferable refers to a case where the feeling of shaking is generally small.
The occupant 100 includes a driver who controls the vehicle and a non-driver who rides in a passenger seat, that is, a passenger. Vehicles also include passenger cars, buses, railway vehicles, and new transportation system vehicles.

For example, as shown in FIG. 2A, when the vehicle travels straight on a flat road, the width of the myoelectric potential amplitude is small. However, as shown in FIG. 2 (b), when the vehicle travels straight on an irregular road, the amplitude of the myoelectric potential increases even though the vehicle travels straight. Thus, the muscular activity of the skeletal muscle related to the posture maintenance of the head 102 of the occupant 100 is activated in order to suppress the shaking of the head. That is, the viscoelasticity around the neck increases in order to suppress the shaking of the head. By quantifying the degree of activation, it can be used as a substitute feature amount for the rolling feeling.
In the evaluation apparatus 10 of the present embodiment, when the sense of rolling is large, the simultaneous activity amount representing the characteristics of the pair of left and right muscle activities of the skeletal muscle related to the posture maintenance of the head 102 of the occupant 100 is increased. Evaluate the rolling feeling appropriately and quantitatively.

The evaluation apparatus 10 includes a measurement unit (muscle activity measuring means) 12 and an evaluation unit 14, and an input unit 16 and a display unit 18 are connected to the evaluation unit 14.
Here, the input unit 16 is used for input of a computer, such as a keyboard and a mouse.
The display unit 18 displays input information from the input unit 16 and information obtained by the evaluation unit 14. As the display unit 18, various monitors such as a CRT, LCD, PDP, and organic EL can be used.

The measurement unit 12 includes a myoelectric sensor 20a, a myoelectric sensor 20b, a ground electrode 22, and an amplifier 24, and further includes a vehicle information acquisition sensor (vehicle information acquisition means) 26.
Since the myoelectric sensor 20a and the myoelectric sensor 20b have the same configuration, the myoelectric sensors 20a and 20b will be collectively described below.
The myoelectric sensors 20a and 20b detect a pair of left and right muscle activities as myoelectric potentials for at least one of the skeletal muscles related to the posture maintenance of the head 102 of the occupant 100.
Each of the myoelectric sensors 20a and 20b is constituted by, for example, a pair of silver-silver chloride (Ag / AgCl) dish-shaped electrodes, and the pair of dish-shaped electrodes are arranged at a predetermined interval, for example, It is affixed to the surface of the skin where the skeletal muscle to be measured 5 mm apart is located.

The silver-silver chloride (Ag / AgCl) electrode used in the myoelectric sensors 20a and 20b of the present embodiment is obtained by coating the surface of metallic silver with silver chloride. It is effective.
The electrodes of the myoelectric sensors 20a and 20b are not limited to silver-silver chloride (Ag / AgCl) electrodes. The electrodes of the myoelectric sensors 20a and 20b may be made of other materials such as stainless steel, carbon, carbon composite, platinum, gold, silver, titanium, conductive resin, and conductive polymer gel. .

  Since the myoelectric potential signal obtained from the myoelectric sensors 20a and 20b is weak, the ground electrode 22 is used to remove ambient noise. The ground electrode 22 is connected to the amplifier 24 and grounded through the amplifier 24.

The amplifier 24 amplifies the myoelectric potential detected by the myoelectric sensors 20a and 20b by a predetermined factor and performs AD conversion. Myoelectric sensors 20a and 20b are connected to the amplifier 24 via lead wires. As this amplifier 24, what is generally called a biological amplifier is used.
The amplifier 24 is connected to the myoelectric information acquisition unit 32, the analysis unit 36, and the storage unit 40 of the evaluation unit 14.
In most cases, the myoelectric potential detected by the myoelectric sensors 20a and 20b is a minute voltage of several microvolts to several millivolts. For this reason, the amplifier 24 amplifies the voltage to a level at which AD conversion is possible, for example, about 1000 times, and the amplified myoelectric potential signal is further A / D converted at a predetermined sampling frequency by the amplifier 24 as a digital signal. It is output to the evaluation unit 14.

The myoelectric sensors 20a and 20b are attached to the skin surface of the neck 102 where the left and right sternocleidomastoid muscles 110 of the occupant 100 are located, for example.
In the present embodiment, the sternocleidomastoid muscle 110 to which the myoelectric sensors 20a and 20b are attached is a muscle in the neck 104 of the occupant 100 as shown in FIG. It is symmetrical. The function of the sternocleidomastoid muscle 110 is to assist in the overall operation of the head 102 such as the turning operation of the head 102 and the forward / backward tilting operation of the head 102.
When the occupant 100 moves the head 102 back and forth, the left and right sternocleidomastoid muscles 110 work simultaneously, and when rotating the head 102, the sternocleidomastoid muscle 110 on the side facing the head 102 works. .
In FIG. 3 (a), only one sternocleidomastoid muscle 110 is shown, but for this sternocleidomastoid muscle 110, for example, the muscles of the sternocleidomastoid muscle 110 that measure a pair of electrodes of the myoelectric sensor 20a are measured. Affixed to the abdomen, parallel to the muscle fibers, for example, on the skin surface of the neck 104 at the position indicated by reference numeral 21.

The pair of electrodes of the myoelectric sensor 20a is attached to the skin surface by scrubbing with a scrub and wiping with alcohol or the like to reduce the resistance between the skin and the electrode of the myoelectric sensor 20a as much as possible. It is done using. When the myoelectric sensor 20a is attached, the electrical resistance between the skin and the electrode of the myoelectric sensor 20a is set to be 30 kΩ or less. In addition, it is desirable that the electric resistance at the time of application to the skin surface is 5 kΩ or less.
The myoelectric sensor 20b to be attached to the remaining sternocleidomastoid muscle 110 on the opposite side is also attached to the sternocleidomastoid muscle 110 by the same method as the myoelectric sensor 20a.

In the present embodiment, the skeletal muscle to be measured is not limited to the sternocleidomastoid muscle 110 as long as it is at least one skeletal muscle involved in maintaining the posture of the head 102 of the occupant 100. For example, as shown in FIG. 3A, it may be a trapezoidal muscle 112 extending from the neck 104 to the back 106 of the occupant 100. The trapezius muscle 112 is also symmetrical with respect to the spine (not shown), although only one side is shown in FIG.
The trapezius muscle 112 has a large muscle, so that the action varies depending on each part. For this reason, the muscular activity of the upper part 112a of the trapezius muscle 112, that is, the site on the neck 104 side involved in maintaining the posture of the head 102 of the occupant 100 is measured. Therefore, the trapezius muscle 112 is affixed to the skin surface position 21 corresponding to the upper portion 112a in the same manner as the myoelectric sensors 20a and 20b are affixed to the sternocleidomastoid muscle 110 described above.

Further, the skeletal muscle to be measured may be the head plate muscle 114 in the neck 104 shown in FIG. The head plate-like muscle 114 is also shown as a pair symmetrically with respect to the spine (not shown), although only one side is shown in FIG.
When one side acts on the head plate-like muscle 114, the neck 104 rotates in that direction, and when both sides act, the face faces upward. For the head plate muscle 114, for example, the myoelectric sensors 20a and 20b are attached to the above-mentioned sternocleidomastoid muscle 110 at the position 21 on the surface of the skin corresponding to the head plate muscle 114 in the lower back of the head. Paste in the same way.

Furthermore, the skeletal muscle to be measured may be the temporal muscle 116 on the side surface of the head 102 shown in FIG. Although FIG. 3B shows only one side, the temporal muscles 116 are on both sides of the head 102.
Also in the case of the temporal muscle 116, for example, the myoelectric sensors 20a and 20b are applied to the position 21 on the surface of the skin corresponding to the temporal muscle 116 in the same manner as that applied to the sternocleidomastoid muscle 110 described above. wear.

The vehicle information acquisition sensor 26 acquires information related to the traveling state of the vehicle such as straight traveling and turning in order to determine whether or not the vehicle is in a substantially straight traveling state. The vehicle information acquisition sensor 26 obtains, for example, predetermined time, vehicle lateral acceleration, yaw rate, and vehicle position information. In this case, as the vehicle information acquisition sensor 26, for example, an acceleration sensor, a rate gyro (angular velocity meter), or GPS is used.
Note that the information related to the running state of the vehicle by the vehicle information acquisition sensor 26 is not limited to the lateral acceleration and yaw rate of the vehicle, and may be, for example, a roll angle or a steering angle instead of the lateral acceleration. The roll angle can be measured using, for example, a gyro sensor.
The steering angle can be measured, for example, by attaching a steering angle meter using a rotary encoder around the steering wheel steering shaft of the vehicle.

In the present embodiment, the configuration of the vehicle information acquisition sensor 26 is not particularly limited as long as the straight traveling state can be specified.
Further, when the vehicle is provided with a lateral acceleration sensor, GPS, etc., the vehicle information acquisition unit 30 is connected to the lateral acceleration sensor, GPS, etc. via a CAN (Controller Area Network), for example, to acquire this vehicle information. Since the unit 30 can acquire lateral acceleration and vehicle position information by GPS, the vehicle information acquisition sensor 26 is not necessarily provided.

As shown in FIG. 1, the evaluation unit 14 includes a vehicle information acquisition unit 30, a myoelectric information acquisition unit 32, a data processing unit 34, an analysis unit (feature amount calculation means) 36, an evaluation unit 38, and a storage. The unit 40 and the CPU 42 are included.
In addition, the storage unit 40 stores vehicle conditions, travel conditions, and subject information, which will be described later, input from the input unit 16, and further associates vehicle conditions, travel conditions, subject information with a simultaneous activity amount described later. Is memorized.
The CPU 42 controls the vehicle information acquisition unit 30, the myoelectric information acquisition unit 32, the data processing unit 34, the analysis unit 36, the evaluation unit 38, and the storage unit 40.
The evaluation unit 14 is a computer in which each unit functions as a result of the CPU 42 executing a program of a rolling feeling evaluation method stored in the storage unit 40. The evaluation unit 14 may be a dedicated device in which each unit is configured by a dedicated circuit.

The vehicle information acquisition unit 30 is connected to the vehicle information acquisition sensor 26. The vehicle information acquisition unit 30 is connected to the data processing unit 34 and the storage unit 40. Note that the vehicle information acquisition unit 30 may be connected to various in-vehicle sensors via the CAN.
For example, an output signal carrying lateral acceleration information during traveling is input from the vehicle information acquisition sensor 26 to the vehicle information acquisition unit 30 as information relating to the traveling state of the vehicle.

The vehicle information acquisition unit 30 performs, for example, low-pass filtering on the output signal of the lateral acceleration to obtain a smoothed signal waveform (smooth waveform) indicating the lateral acceleration. The vehicle information acquisition unit 30 then outputs the data of the lateral acceleration signal waveform (smoothed waveform) to the data processing unit 34 and the storage unit 40.
In the vehicle information acquisition unit 30, for the yaw rate, for example, low-pass filtering is performed on the output signal of the yaw rate to obtain a smoothed signal waveform (smooth waveform) indicating the yaw rate. The vehicle information acquisition unit 30 can also output the data of the signal waveform with the yaw rate smoothed to the data processing unit 34 and the storage unit 40.
The vehicle information acquisition unit 30 outputs the lateral acceleration output signal (signal waveform) and the yaw rate output signal (signal waveform) to the data processing unit 34 and the storage unit 40 without performing signal processing such as smoothing. You can also.

  In the present embodiment, in addition to the lateral acceleration information, roll angle information, GPS vehicle position information, or steering angle information is input from the vehicle information acquisition sensor 26. Even in this case, the vehicle information acquisition unit 30 is based on the output signal of the vehicle information acquisition sensor 26, time-series data of the roll angle value, time-series data of the vehicle position by GPS, or time-series data of the steering angle value. And outputs these data to the data processing unit 34 and the storage unit 40.

  The myoelectric information acquisition unit 32 is connected to the amplifier 24, the data processing unit 34, and the storage unit 40. The myoelectric information acquisition unit 32 performs rectification and smoothing on the digital signal obtained by A / D converting the myoelectric potential of the sternocleidomastoid muscle 110 acquired in time series by the myoelectric sensors 20a and 20b. Data of the myoelectric potential waveform of the smooth sternocleidomastoid muscle 110 is obtained.

In the present embodiment, for example, full-wave rectification is performed on the digital signal output from the amplifier 24, for example, low-pass filtering is performed using a second-order Butterworth filter (1 to 10 Hz in the cutoff frequency range), Rectify and smooth. Thereby, a smoothed signal waveform (hereinafter also referred to as a smoothed myoelectric waveform) can be obtained for each myoelectric potential of the left and right sternocleidomastoid muscles 110.
The myoelectric information acquisition unit 32 outputs the smoothed myoelectric waveform data to the data processing unit 34 and the storage unit 40.

  In the myoelectric information acquisition unit 32, a filter used for low-pass filtering is not limited to a second-order Butterworth filter, and a third-order or higher-order Butterworth filter may be used. Furthermore, when rectifying and smoothing, a moving average may be used instead of low-pass filtering.

The data processing unit 34 is connected to the analysis unit 36, the display unit 18, the storage unit 40, and the CPU 42.
The data processing unit 34 specifies whether the vehicle is in a substantially straight traveling state from the measured lateral acceleration signal waveform or the myoelectric potential signal waveform of the sternocleidomastoid muscle 110.
In the case of lateral acceleration, for example, a trend component of a direct current component (DC component or 0 Hz) to 0.5 Hz is obtained from the data of the signal waveform of the lateral acceleration. If the obtained trend component is smaller than a preset value, it is determined that the vehicle is in a substantially straight state.
In the lateral acceleration, the trend component used for determining the substantially straight traveling state is preferably 0.25 Hz or less.

  When the data processing unit 34 determines that the vehicle is in a substantially straight traveling state, for example, a signal indicating that the vehicle is in a substantially straight traveling state (hereinafter simply referred to as a straight traveling signal) is output to the CPU 42. The CPU 42 that has received this straight-ahead signal outputs a calculation signal for causing the analysis unit 36 to calculate the amount of simultaneous activity to the analysis unit 36.

Also in the yaw rate, the trend component of the yaw rate signal waveform is obtained in the same manner as the lateral acceleration described above, and the value of this trend component is compared with a predetermined threshold value. It is determined whether or not there is.
With respect to the steering angle value, it is determined whether or not the vehicle is in a substantially straight traveling state by comparing the steering angle value with a predetermined threshold value determined in advance without obtaining a trend component.
Also, with respect to the vehicle position by GPS, whether or not the vehicle is in a substantially straight traveling state as compared with a predetermined threshold value determined in advance with respect to the time change of the vehicle position by GPS without obtaining a trend component. Is determined.
Moreover, when using the vehicle position by GPS, you may obtain | require the driving | running | working locus | trajectory of a vehicle and perform pattern matching about this driving | running | working locus | trajectory, and may specify the driving | running state of a vehicle. In this case, the acquisition timing of the vehicle position information is associated with the timing in the signal waveform of the myoelectric potential.

When the data processing unit 34 determines that the vehicle traveling state is a substantially straight traveling state and outputs a straight traveling signal to the CPU 42, a calculation signal is output from the CPU 42 to the analyzing unit 36, as will be described later. The simultaneous activity amount is obtained by the analysis unit 36.
Note that the present invention is not limited to determining the traveling state of the vehicle during traveling and obtaining the simultaneous activity amount by the analyzing unit 36 at that time. After traveling, the simultaneous activity amount may be obtained for a section determined by the data processing unit 34 to be in a straight traveling state.

Further, when measuring the myoelectric potential, it is preferable that the speed of the vehicle is constant in addition to the vehicle traveling straight. In this case, an acceleration sensor that measures the longitudinal acceleration is provided as the vehicle information acquisition sensor 26. The acceleration sensor measures the longitudinal acceleration of the traveling vehicle, acquires the acceleration value by the vehicle information acquisition unit 30, and outputs it to the data processing unit 34. The data processing unit 34 compares it with a predetermined threshold value of acceleration in the front-rear direction, and determines that the speed is constant if it is smaller than this.
As for the longitudinal acceleration, for example, if an ABS is equipped, an acceleration output signal mounted on the ABS can be used. In this case, the longitudinal acceleration value is obtained via CAN. It can be acquired by the vehicle information acquisition unit 30. For this reason, it is not always necessary to provide a longitudinal acceleration sensor.

In the present embodiment, the data processing unit 34 uses the vehicle information to determine the traveling state of the vehicle, but the present invention is not limited to this.
For example, the measured myoelectric potential may be used to determine whether or not the vehicle is substantially straight. In this case, trend components are obtained for the smoothed myoelectric waveform data of the left and right sternocleidomastoid muscles 110, respectively.
Then, the deviation between the trend component of the left sternocleidomastoid muscle 110 and the trend component of the right sternocleidomastoid muscle 110 is obtained. For this deviation, a range that can be regarded as a straight traveling state is set in advance by experiments or the like. Based on this deviation, it is determined whether or not the traveling state of the vehicle is a substantially straight traveling state.

The deviation of the trend component obtained from the smoothed myoelectric waveform data of the left and right myoelectric potentials is caused by a steady external force. For this reason, if this deviation is sufficiently small, it can be considered that the vehicle is in a substantially straight traveling state.
As described above, even when it is determined that the vehicle is in the straight traveling state based on the signal waveform of the myoelectric potential of the left and right sternocleidomastoid muscles 110, a straight traveling signal is output from the data processing unit 34 to the CPU 42. The CPU 42 that has received this straight signal outputs a calculation signal to the analysis unit 36.

In the present embodiment, by setting the traveling condition as a straight road, the myoelectric potentials obtained by the myoelectric sensors 20a and 20b are used, respectively, without acquiring the vehicle traveling information, as will be described later. The amount of simultaneous activity may be obtained.
For this reason, it is not always necessary to acquire information on the traveling state of the vehicle, and it is not always necessary for the data processing unit 34 to determine whether or not the vehicle is in a substantially straight traveling state. In this case, the data processing unit 34 is unnecessary, and the data of the smoothed myoelectric waveform of the left and right sternocleidomastoid muscles 110 are directly output from the myoelectric information acquisition unit 32 to the analysis unit 36.

  The analysis unit 36 calculates the amount of simultaneous activity representing the characteristics of the skeletal muscles related to the posture maintenance of the head 102 of the occupant 100, in this embodiment, the muscle activity waveform of the sternocleidomastoid muscle 110 when the vehicle is traveling straight, This simultaneous activity amount is output to the evaluation unit 38. The amount of simultaneous activity is obtained using, for example, smoothed myoelectric waveform data obtained by the myoelectric information acquisition unit 32.

The simultaneous activity amount of the present invention refers to the left and right sternocleidomastoid muscles in this embodiment when the vehicle is running substantially straight, but at least one of the skeletal muscles related to maintaining the posture of the head, This is a quantification of the degree of activation in a state in which the muscles are activated, that is, in a state in which viscoelasticity around the neck is increased.
Therefore, the amount of simultaneous activity is basically in a state where a pair of left and right skeletal muscles are activated at substantially the same timing as shown in FIG. In FIG. 4A, reference numeral 50a indicates a smoothed myoelectric waveform of the right muscle, and reference numeral 52a indicates a smoothed myoelectric waveform of the left muscle.

However, depending on the vehicle characteristics and the road surface condition, even when the vehicle is in a substantially straight traveling state, as shown in FIG. 4B, the right side muscle and the left side muscle of the pair of left and right skeletal muscles In some cases, myoelectric potentials are alternately switched, that is, muscle activation occurs alternately. In the present invention, a simultaneous activity amount obtained by a mathematical expression described later on the basis of the myoelectric potential waveform 50b of the right muscle and the myoelectric potential waveform 52b of the left muscle is also used as the simultaneous activity amount in the present invention.
Further, the vehicle is in a substantially straight traveling state, and as shown in FIG. 4 (c), both the right and left muscles of the pair of left and right skeletal muscles have a myoelectric potential higher than the normal state. In other cases, the myoelectric potential is alternately switched between the right and left muscles, that is, the activation level may be changed alternately when the muscle is activated. . In the present invention, a simultaneous activity amount obtained by a mathematical expression described later based on the right muscle EMG waveform 50c and the left muscle EMG waveform 52c in this case is also a simultaneous activity amount in the present invention.

The analysis unit 36 calculates the amount of simultaneous activity using, for example, the left and right smoothed myoelectric waveform data as follows.
The analysis unit 36 obtains the average value of the addition average or the RMS value of the addition average for the left and right smoothed myoelectric waveform data, and simultaneously calculates the average value V _{1 of the} addition average or the RMS value V ₂ of the addition average. The amount of activity.
The average value V ₁ of the addition average is obtained by the following formula 1, and the RMS value V ₂ of the addition average is obtained by the following formula 2.
Here, in the following formulas 1 and 2, e _R1 is the myoelectric potential in the right smoothed myoelectric waveform data, and e _L1 is the potential in the left smoothed myoelectric waveform data.
The average value _{V 1} and the averaging RMS value _{V 2} of the averaging described above, the left and right smoothed EMG data, respectively, for example, 0.5 seconds or more data, preferably, 1 to 60 It is obtained using data with a length of about 2 seconds.

The analysis unit 36 combines the left and right smoothed myoelectric waveform data to obtain the geometric average waveform data, obtains the average value or RMS value of the geometric average waveform data, and calculates the geometric average waveform. of the average value V ₃ or the data of the geometric mean waveform RMS value V ₄ of the data may be simultaneous activity amount.
The average value V ₃ of the geometric mean waveform data is obtained by the following mathematical formula 3, and the RMS value V ₄ of the geometric mean waveform data is obtained by the following mathematical formula 4.
Here, e _R1 and e _L1 in the following formulas 3 and 4 are the same as the formulas 1 and 2.
The average value and the RMS value of the above-mentioned geometric average waveform data are, for example, data of 0.5 seconds or more, preferably about 1 to 60 seconds for the left and right smoothed myoelectric waveform data. It is calculated using the data.

Further, the analysis unit 36 uses the digital signal obtained by A / D-converting the myoelectric potential of the sternocleidomastoid muscle 110 in the myoelectric information acquisition unit 32, that is, left and right rectified and smoothed. The amount of simultaneous activity may be obtained using the myoelectric potential of the sternocleidomastoid muscle 110 of the other. In this case, the RMS value per unit time is obtained for each of the left and right sides. That is, the right RMS value RMS _R1 per unit time and the left RMS value RMS _L1 per unit time are obtained.
Then, an average value V ₅ or a geometric average value (geometric average value) V ₆ of the left and right RMS values is obtained. The average value V _{5 of} these left and right RMS values or the geometric average value V ₆ of the left and right RMS values is defined as the simultaneous activity amount.

Specifically, the right RMS value RMS _R1 is obtained by the following Equation 5, and the left RMS value RMS _L1 is obtained by the following Equation 6.
An average value V ₅ of the left and right RMS values is obtained by the following formula 7, and a geometric average value V ₆ of the left and right RMS values is obtained by the following formula 8.
Here, in the following formulas 5 to 8, _ER1 is the right myoelectric potential, and _EL1 is the left myoelectric potential.
The unit time for obtaining the RMS value is, for example, 0.5 seconds or more, and preferably about 1 to 60 seconds.

In the present embodiment, V _{1 to} V ₆ calculated by any one of Equations 1 to 4 and Equations 7 and 8 can be used as the simultaneous activity amount. Using this amount of simultaneous activity, the rolling feeling is evaluated.
The simultaneous activity amount calculated by the analysis unit 36 is output to the evaluation unit 38. Note that the simultaneous activity amount calculated by the analysis unit 36 may be stored in the storage unit 40.

  Moreover, the analysis part 36 is connected to the display part 18, and the value of the simultaneous activity amount calculated by the analysis part 36 can also be displayed together with the waveform of the myoelectric potential, for example.

  The evaluation unit 38 evaluates the feeling of rolling using the simultaneous activity amount calculated by the analysis unit 36. In the evaluation unit 38, it is evaluated that the rolling feeling is smaller as the simultaneous activity amount calculated by the analysis unit 36 is smaller. This is because, when the amount of simultaneous activity is large, the head 102 of the occupant 100 shakes greatly even when the vehicle is in a substantially straight traveling state.

The evaluation unit 38 is connected to the display unit 18, and an evaluation result using the simultaneous activity amount calculated by the analysis unit 36 is displayed on the display unit 18.
Note that the storage unit 40 includes the smoothed myoelectric waveform data obtained by the myoelectric information acquisition unit 32, the above-mentioned simultaneous activity amount obtained by the analysis unit 36, and the evaluation result information obtained by the evaluation unit 38. Each is input and stored. The storage unit 40 can also store a myoelectric digital signal obtained by the conversion by the amplifier 24.

In the present embodiment, it is preferable that the measured myoelectric potential is normalized in advance with a lateral external force.
The normalization of the myoelectric potential is, for example, RVE (Reference Voluntary Electric activity) as a reference value based on the amount of muscle activity with the head's own weight as a load by not contacting the head in the lateral position (posture to sleep sideways). To do. The myoelectric potential is normalized using this reference value.

Alternatively, a lateral external force having a known magnitude may be applied to the head, the myoelectric potential at that time may be measured, and the magnitude of the applied external force may be normalized as a reference value.
Furthermore, let the occupant tilt his / her head at an arbitrary angle in the lateral direction, measure the posture at that time, that is, the angle of the head using a sensor that can understand the posture of the head, and simultaneously measure the myoelectric potential, It is also possible to obtain the electric potential and the lateral force acting on the head and normalize the myoelectric potential using the lateral force as a reference value.

  Thus, if the myoelectric potential is normalized, it is possible to determine the traveling state of the vehicle such as going straight or turning by measuring the myoelectric potential. Accordingly, it is not necessary to simultaneously measure the vehicle motion when evaluating the rolling feeling, and the rolling feeling of the vehicle can be evaluated only by measuring the myoelectric potential. For this reason, when evaluating the rolling feeling, the measurement can be simplified and the evaluation can also be simplified.

Note that by normalizing the myoelectric potential, it is only necessary to measure the myoelectric potential of the occupant who is the object of evaluation, so that the vehicle information acquisition sensor 26 of the vehicle is not required and the occupant changes multiple vehicles. The rolling feeling can be evaluated for each of the plurality of vehicles.
In addition, when using normalization of myoelectric potential, it is preferably performed every time an electrode for measuring myoelectric potential is attached.

  In the present embodiment, myoelectric potential is used as the information on muscle activity, but the present invention is not limited to this. For example, the muscle sound may be measured by arranging an acceleration sensor in the muscle. The muscle sound is a kind of pressure wave generated as a result of the diameter of the muscle fiber expanding and deforming laterally when the muscle fiber contracts, and is a signal reflecting the mechanical activity of the muscle. In the present embodiment, even when this muscle sound is used, the rolling feeling can be evaluated in the same manner as the myoelectric potential.

Next, a method for evaluating the rolling feeling of the vehicle according to the present embodiment will be described.
First, for example, a driver is seated on a car seat, and further, for example, the passenger 100 is placed on the passenger seat. The myoelectric sensors 20a and 20b are attached to the positions on the surface of the skin corresponding to the left and right sternocleidomastoid muscles 110, respectively.
Note that the myoelectric potential may be measured by attaching the myoelectric sensors 20a and 20b to the driver at positions on the surface of the skin corresponding to the left and right sternocleidomastoid muscles 110.

Next, the vehicle is driven by the driver, for example, the vehicle is driven in a substantially straight line.
While the vehicle is traveling on this straight line, the myoelectric potential of the occupant 100 is measured by the myoelectric sensors 20a and 20b of the measurement unit 12 as described above.
In the evaluation unit 14, the myoelectric information acquisition unit 32 obtains a smoothed myoelectric waveform for the measured left and right sternocleidomastoid muscles 110. The smoothed myoelectric waveform data is output to the analysis unit 36.
At this time, vehicle information such as lateral acceleration by the vehicle information acquisition unit 30 for determining whether or not the automobile is traveling in a substantially straight line is unnecessary.

  Next, in the analysis unit 36, the amount of simultaneous activity is calculated from the signal waveform data of the myoelectric potential of the sternocleidomastoid muscle 110 using, for example, any one of the above formulas 1 to 4. The calculated amount of simultaneous activity is output to the evaluation unit 38.

Next, the evaluation unit 38 evaluates based on the simultaneous activity amount. In this case, as described above, the evaluation unit 38 evaluates that the smaller the simultaneous activity amount, the smaller the rolling feeling.
The evaluation result of the rolling feeling by the evaluation unit 38 may be displayed on the display unit 18.

  Sensory evaluation of the feeling of rolling is difficult to evaluate with a general driver. However, in this embodiment, when the vehicle is substantially straight, the myoelectric potential of the left and right sternocleidomastoid muscles 110 is measured, and the amount of simultaneous activity is calculated using this myoelectric potential to test the sense of rolling. Appropriate and quantitative evaluation can be performed regardless of driver or general driver. For this reason, the evaluator does not need to be an expert person such as a test driver. In addition, since it is not a sensory evaluation, there are fewer restrictions on the experimental procedure, and furthermore, variations in evaluation are suppressed. In particular, if the myoelectric potential is normalized, the accuracy of evaluation can be increased.

  Moreover, in this embodiment, when evaluating rolling feeling, it was made to drive | work linearly, However, This invention is not limited to this. For example, as described above, vehicle information such as lateral acceleration is acquired by the vehicle information acquisition sensor 26, and a trend component having a direct current component (DC component or 0 Hz) to 0.5 Hz or less is obtained from the signal waveform data of the lateral acceleration. Ask. If the calculated trend component is smaller than a preset value, the data processing unit 34 determines that the vehicle is in a substantially straight traveling state, a straight traveling signal is output to the CPU 42, and a calculation signal is output from the CPU 42 to the analyzing unit 36. Thus, the amount of simultaneous activity is calculated as described above, and the rolling feeling is evaluated.

Furthermore, the deviation between the trend component of the left sternocleidomastoid muscle 110 and the trend component of the right sternocleidomastoid muscle 110 from the smoothed electromyogram waveform data of the myoelectric potentials of the left and right sternocleidomastoid muscles 110 of the occupant 100 (Driving state feature amount) is obtained, and based on this deviation, it is determined whether or not the traveling state of the automobile is a substantially straight traveling state. When the vehicle is traveling straight, a straight traveling signal is output to the CPU 42, Further, a calculation signal is output from the CPU 42 to the analysis unit 36, the amount of simultaneous activity is calculated as described above, and the feeling of rolling is evaluated.
In this case, it is not necessary to acquire vehicle information such as lateral acceleration by the vehicle information acquisition sensor 26. Note that the myoelectric potential of the occupant 100 is preferably normalized as described above.

In the present embodiment, the rolling feeling evaluation method is not limited to the above-described evaluation method.
In the present embodiment, for example, after data on rolling feeling is accumulated, the amount of simultaneous activity may be compared between arbitrary conditions to evaluate the rolling feeling.
In this case, as shown in FIG. 5, first, vehicle conditions, running conditions, and subject information are input to the evaluation unit 14 by the input unit 16 using the evaluation device 10 (step S10). These vehicle conditions, travel conditions, and subject information (occupant information) are stored in the storage unit 40.

Note that subject information that has a high degree of necessity includes, for example, a symbol, number or name that can identify an individual subject, input date of subject information, subject age, subject sex, subject height, subject weight Is mentioned.
Information that should be input as the subject information includes the subject's nationality, the subject's current address or the area where he / she lives, the presence / absence of riding in the category of vehicle subject to the subject's evaluation, duration and frequency, Existence / non-existence, duration and frequency of driving of the vehicle of the category to be evaluated, and presence / absence and duration of the subject's evaluation experience.
Examples of vehicle conditions include vehicle type name, model, displacement, years of use, travel distance, tire type, tire air pressure, and the like.
The traveling conditions include, for example, traveling conditions such as urban areas, suburbs, high speeds, and dredging, and road surface conditions such as drying, rain, or snow.

  Next, the vehicle is caused to travel based on the travel conditions. At this time, myoelectric sensors 20a and 20b are attached to the left and right sternocleidomastoid muscles 110 in the occupant 100, and thereby muscle activity is measured (step S12).

Next, based on the measured muscle activity, as described above, any one of V _{1 to} V ₆ is calculated as the simultaneous activity amount using any one of Equations 1 to 4 and Equations 7 and 8. (Step S14).
Next, the calculated simultaneous activity amount is stored in the storage unit 40 as a set in association with the input vehicle condition, running condition, and subject information (step S16).
Next, if the accumulation of data is sufficient (step S18), the amount of simultaneous activity is compared between arbitrary conditions, and the rolling feeling is evaluated (step S20).
Thus, by comparing between arbitrary conditions, the superiority or inferiority of the rolling feeling between each condition can be evaluated.

On the other hand, if the data accumulation is insufficient (step S18), at least the vehicle condition or the traveling condition is changed among the vehicle condition, the traveling condition, and the subject information condition, and the vehicle condition, the traveling condition, and the subject information are again set. It inputs into the evaluation unit 14 by the input part 16 (step S10).
Then, the vehicle is caused to travel based on the above traveling conditions, and the muscle activity at this time is measured (step S12).
Based on the measured muscle activity, as described above, any one of V _{1 to} V ₆ is calculated as the simultaneous activity amount using any one of Equations 1 to 4 and Equations 7 and 8. (Step S14).

Then, the calculated simultaneous activity amount is stored in the storage unit 40 in association with the input vehicle condition, travel condition, and subject information (step S16). These steps S12 to S16 are repeated.
If the data accumulation is sufficient (step S18), the amount of simultaneous activity is compared between arbitrary conditions, and the feeling of roll is evaluated (step S20).

  It should be noted that the determination of whether or not the data is sufficiently stored in step S18 is determined to be sufficient if at least one subject has accumulated at least a plurality of vehicle condition or driving condition data. The In addition, if the number of subjects, vehicle conditions, driving conditions, etc. are determined in advance as the amount of data accumulated, data is repeatedly accumulated until the number is reached (step S18). The amount of simultaneous activity is compared between arbitrary conditions, and the feeling of rolling is evaluated (step S20).

The present invention evaluates the rolling feeling of the vehicle. Further, the following evaluation can be performed based on the evaluation of the rolling feeling.
For example, the ride comfort due to the difference in the vehicle itself can be evaluated. In this case, the ride quality of the same vehicle can be evaluated based on individual differences.
In addition, the ride comfort due to the difference in the tires on which the vehicle is mounted can be evaluated. In addition, it is possible to evaluate the riding comfort due to the difference in the characteristics of the suspension assembled with the vehicle. In addition, it is possible to evaluate the riding comfort due to differences in seat position such as the seat angle of the vehicle, the seat cushion angle of the seat cushion, the back angle of the seat back, and the seating posture of the seat.
In addition, a difference in seat position, for example, in the case of a passenger car, ride comfort due to a driver seat, a passenger seat, a rear seat (left, center, right), etc. can be evaluated.
It is also possible to evaluate the riding comfort of passenger seats due to differences in drivers in passenger cars such as taxis and buses. In this case, it can be applied to driver's driving skill evaluation in passenger cars.
Furthermore, it is possible to evaluate the ride comfort of passenger seats in vehicles such as railway vehicles and new traffic systems that travel on the track. In this case, it is possible to evaluate riding comfort due to differences in vehicle characteristics, tracks, and driving control.

  The present invention is basically as described above. The vehicle evaluation method and the vehicle evaluation apparatus according to the present invention have been described in detail above. However, the present invention is not limited to the above-described embodiment, and various improvements or modifications can be made without departing from the gist of the present invention. Of course it is also good.

Hereinafter, the Example of the evaluation method of the rolling feeling of the vehicle of this invention is described concretely.
In this example, a straight running test is performed under the following various conditions, the muscle activity of the left and right sternocleidomastoid muscles is measured, the amount of simultaneous activity is obtained, and the sensory evaluation of the rolling feeling at that time is performed. went.
The straight running test was performed at a speed of 60 km / hour. The road surface condition was a paved irregular road surface. This irregular road surface has undulations.

In this example, a passenger car was used as the test vehicle, and the tire air pressure was set to three types of specifications A to C shown below.
A 4-door sedan with a displacement of 3.5 liters and FR (rear wheel drive) was used for the passenger car. The tire size was 225 / 45R17.
In the specification A, the tire air pressure was 150 kPa at the front and 150 kPa at the rear.
In the specification B, the tire air pressure was 220 kPa at the front and 220 kPa at the rear.
In the specification C, the tire air pressure was 300 kPa at the front and 300 kPa at the rear.

In this example, the amount of simultaneous activity was determined as follows.
When obtaining the amount of simultaneous activity, each test vehicle of the above specifications A to C has 5 test drivers (hereinafter simply referred to as test drivers) who work on sensory evaluation of vehicle motion characteristics and ride comfort, and a driver's license. 20 general adult males who ride on each test vehicle of the above specifications A to C as passengers, and each test driver (5 persons) and each general adult male (20 persons) in the straight running test The muscle activity of the left and right sternocleidomastoid muscles was measured using the measurement apparatus 10 described above.
And the amount of simultaneous activities was calculated | required by the said Numerical formula 2 about each test driver (5 persons) and each general adult male (20 persons).

The result of the simultaneous activity amount of each test driver (5 persons) is shown in FIG. 6 (a), and the result of the simultaneous activity amount of each general adult male (20 persons) is shown in FIG. 7 (a).
In FIG. 6 (a), the maximum value of the simultaneous activity amount by the test driver is set to 100.0 and displayed as an index.
Moreover, in Fig.7 (a), among the simultaneous activity amount by a general adult male, the maximum value is displayed with the index | exponent as 100.0.

The sensory evaluation of the rolling feeling was performed as follows.
In the sensory evaluation of the feeling of rolling, each test driver (5 persons), each of the test drivers (5 persons), General adult men (20 people) were evaluated based on the evaluation criteria shown in Table 1 below for the preference of rolling feeling during the straight running test using each test vehicle.
The evaluation result of the rolling feeling of each test driver (5 persons) is shown in FIG. 6B, and the evaluation result of the rolling feeling of each general adult male (20 persons) is shown in FIG. 7B.

  In addition, about the measurement of the muscular activity of the left and right sternocleidomastoid muscles by each test driver (5 persons) and each general adult male (20 persons) and the sensory evaluation of the rolling feeling, the driving of the test vehicle of the specification A to the specification C Was made by the same driver. That is, in this embodiment, there is one driver for measuring muscle activity and for sensory evaluation of rolling feeling.

In the test driver, as shown in FIG. 6A, the amount of simultaneous activity decreases in the order of specification A, specification B, and specification C. Therefore, the evaluation of the rolling feeling based on the simultaneous activity amount is preferable in the order of the specification A, the specification B, and the specification C.
Moreover, as shown in FIG.6 (b), the score of sensory evaluation becomes high in order of the specification A, the specification B, and the specification C. FIG. From this, the evaluation of the rolling feeling based on sensory evaluation is preferable in the order of specification A, specification B, and specification C.
Thus, in the test driver, the result of the simultaneous activity amount shown in FIG. 6A matches the result of the sensory evaluation shown in FIG. 6B.

On the other hand, as shown in FIG. 7A, the general adult male has a smaller amount of simultaneous activity in the order of specification A, specification B, and specification C. Therefore, the evaluation of the rolling feeling based on the simultaneous activity amount is preferable in the order of the specification A, the specification B, and the specification C.
In addition, as shown in FIG. 7B, the sensory evaluation score increases in the order of specification A, specification B, and specification C. However, the difference between the specifications A to C is small, and the specifications B and C are almost the same in consideration of variation. For this reason, in general adult males, the evaluation of the rolling feeling based on the sensory evaluation is not good with respect to the specifications A, B and C.

When comparing a test driver with a general adult male, the general adult male has not been able to evaluate the rolling feeling based on the sensory evaluation with respect to the specifications A, B and C.
However, regarding the amount of simultaneous activity, the difference between the test driver and the general adult male is not so different in the sensory evaluation. From this, according to the simultaneous activity amount of the present invention, even a general adult male can evaluate the feeling of rolling as with the test driver.

DESCRIPTION OF SYMBOLS 10 Evaluation apparatus 12 Measurement unit 14 Evaluation unit 16 Input part 18 Display part 20a, 20b Myoelectric sensor 22 Ground electrode 24 Amplifier 26 Vehicle information acquisition sensor 30 Vehicle information acquisition part 32 Myoelectric information acquisition part 34 Data processing part 36 Analysis part 38 Evaluation unit 40 Storage unit 42 CPU

Claims (7)

Measuring a pair of left and right muscle activities for at least one of the skeletal muscles related to posture maintenance of the head of an occupant of a vehicle traveling under a predetermined traveling condition;
Calculating a simultaneous activity amount representing the waveform characteristics of the measured muscle activity;
And a method of evaluating a rolling feeling of the vehicle based on the amount of simultaneous activity.   2. The vehicle evaluation method according to claim 1, wherein the simultaneous activity amount is calculated based on the pair of left and right muscle activities related to maintaining the posture of the head of the occupant. Furthermore, before the step of evaluating the rolling feeling of the vehicle, it includes a step of determining whether or not the vehicle is in a substantially straight traveling state,
In the step of determining that the vehicle is in a substantially straight traveling state, if it is determined that the vehicle is in a substantially straight traveling state, the vehicle rolls according to the simultaneous activity amount in the step of evaluating the rolling feeling of the vehicle. The vehicle evaluation method according to claim 1, wherein the feeling is evaluated. In the step of determining that the vehicle is substantially straight,
4. The deviation of the trend component of the left and right muscle activity in the skeletal muscle of the occupant selected as a pair of left and right is obtained, and when this deviation is within a predetermined range, it is determined that the vehicle is in a substantially straight traveling state. The vehicle evaluation method described.   Furthermore, before the step of evaluating the rolling feeling of the vehicle, the vehicle has a step of determining whether the longitudinal speed of the vehicle is substantially constant. If the longitudinal speed is substantially constant, the rolling feeling of the vehicle is determined. The vehicle evaluation method according to any one of claims 1 to 4, wherein in the step of evaluating the vehicle, the rolling feeling of the vehicle is evaluated by the simultaneous activity amount.   The skeletal muscle whose muscle activity is measured is at least one of the sternocleidomastoid muscle, the upper part of the trapezius, the temporal muscle, and the head plate muscle. The vehicle evaluation method described in 1. Muscle activity measuring means for measuring a pair of left and right muscle activities for at least one of the skeletal muscles related to maintaining the posture of the head of the occupant of the vehicle traveling under a predetermined traveling condition;
A feature amount calculating means for calculating a simultaneous activity amount representing a feature of the muscle activity information measured by the muscle activity measuring means;
An evaluation apparatus for a vehicle, comprising: an evaluation unit that evaluates a rolling feeling of the vehicle based on the simultaneous activity amount calculated by the feature amount calculation means.

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