JP2022012084A - Virtual vibration bodily sensation system - Google Patents

Abstract

To provide a virtual vibration bodily sensation system capable of obtaining objective and quantitative data about a phenomenon and a feeling that a subject of virtual vibration experiences.SOLUTION: A virtual vibration bodily sensation system 100 comprises a video generation device 10 for generating a video at the time of occurrence of virtual vibration, a vibration generation system 20 for generating vibration at the time of occurrence of virtual vibration, a bodily sensation measurement device 30 for measuring a phenomenon and a feeling occurring in a human body of a subject P at the time of occurrence of virtual vibration, and a vibration measurement device 40 for measuring vibration at the time of occurrence of virtual vibration. The video generation device 10 is constituted of a head-mounted display 11, the vibration generation system 20 from a vibration table 21 and a vibration generation device, the bodily sensation measurement device 30 from a biological sensor, and the vibration measurement device 40 from an accelerometer.SELECTED DRAWING: Figure 2

Description

The present invention relates to a virtual vibration experience system that allows a simulated experience of an event evoked when vibration occurs, a virtual experience of the phenomenon and sensation that occur in the human body at that time, and a quantitative measurement. Is.

In large-scale facilities such as concert halls and live houses, a large number of viewers dance and jump to the music played by musicians, causing low-frequency vertical vibration (longitudinal vibration) on the floor of the structure. ) Occurs.
In recent years, when large-scale facilities such as concert halls and live houses have become even larger and accommodate an extremely large number of viewers, low-frequency vertical vibrations caused by viewers dancing and jumping occur. The power is also extremely large.

Here, as shown in FIG. 1, the high-power vertical vibration is transmitted to the pillar 102, the foundation 103, etc. via the structural floor 101 of the large-scale facility 100, and the ground 104 directly under the large-scale facility 100 is also transmitted. It will vibrate in the vertical direction.
Further, this vertical vibration is transmitted to the ground 105 around the large-scale facility 100, but as it is transmitted to the surrounding ground 105, the vertical vibration is attenuated and the ratio of the horizontal vibration is higher. Will increase.
Then, when a building 106 having the same natural frequency as the propagating ground vibration exists in the vicinity, a phenomenon that the building 106 vibrates violently (resonance) occurs with the ground vibration.

Therefore, by isolating the structural floor of a large-scale facility where vertical vibration occurs and reducing the vibration transmission rate, it is possible to reduce the propagation of vibration to the surrounding ground and the surrounding buildings resonate. A construction method has been proposed to prevent this from occurring (see Patent Document 1).

In addition, the effect of dampening the vertical vibration generated by the longitudinal vibration is great, it does not cause inconvenient gaps and steps on the floor surface, and the structure of the structural floor does not become complicated, so it takes a lot of time for construction. An anti-vibration frame for structural floors that does not require cost is also provided (see Patent Document 2).

Japanese Unexamined Patent Publication No. 2006-057260 Japanese Unexamined Patent Publication No. 2019-090180

According to the anti-vibration method disclosed in Patent Document 1 and the anti-vibration structure disclosed in Patent Document 2, the vibration transmission rate is reduced by isolating the structural floor of a large-scale facility where longitudinal resonance occurs. This makes it possible to reduce the propagation of vibrations to the surrounding ground and prevent the surrounding buildings from resonating.

Here, when trying to prevent vertical vibration, the vertical rigidity of the structure floor tends to be softer than that of a general structure floor, and the vertical vibration of the structure floor generated by the vertical tension tends to increase. be.

However, the range of regulation of vertical vibration of the structural floor caused by vertical glue has been poor, and no laws or standards have been established. Therefore, the vertical rigidity of the structural floor is appropriate. It was difficult to determine the range.

The present invention has been made in view of such conventional problems, and is designed to determine the vertical rigidity of the structural floor suitable for vibration, particularly longitudinal vibration. The purpose is to provide a virtual vibration experience system that allows you to experience the events that occur when they occur in a simulated manner, virtually experience the phenomena and sensations that occur in the human body at that time, and can also measure them quantitatively. And.

In order to achieve the above object, the virtual vibration experience system of the present invention includes an image generator that generates an image when virtual vibration is generated, a vibration generator that generates vibration when virtual vibration is generated, and a vibration generator when virtual vibration is generated. It is characterized by being composed of a bodily sensation measuring device for measuring phenomena and sensations occurring in the human body of a subject, and a vibration measuring device for measuring vibration when virtual vibration occurs.

Here, the virtual vibration is characterized by being a virtual vertical vibration, a virtual horizontal vibration, or a virtual vertical and horizontal vibration combining them. In particular, it is characterized by a virtual vertical vibration.

The image generator preferably comprises a head-mounted display to be worn on the subject.

The vibration generator is preferably composed of a shaking table on which the subject stands upright and a vibration generating device that vibrates the shaking table in the vertical direction, the horizontal direction, or a combination thereof in the vertical and horizontal directions.

The bodily sensation measuring device is characterized by being a measuring device equipped with a biological sensor that is attached to the body of a subject and quantitatively measures phenomena and sensations that occur in the human body.

The bodily sensation measuring device may be a sweating measuring device capable of measuring the sweating amount of the subject by connecting a sweating sensor to the tip portion and fixing the sweating sensor to the palm portion of the subject.

The vibration measuring device is preferably composed of an accelerometer capable of measuring the acceleration of the shaking table by mounting it on the shaking table.

According to the virtual vibration experience system of the present invention, it is possible to simulate the phenomenon caused when vibration occurs, especially when vertical vibration occurs, and it is possible to virtually experience the phenomenon and sensation generated in the human body at that time. , Can also be measured quantitatively.

Then, objective data on the phenomena and sensations experienced by the subject of virtual vibration, especially virtual vertical vibration, is collected, and based on the data, the vertical rigidity of the structure floor appropriate for vertical vibration is obtained. Can be decided.

It is explanatory drawing which shows the transmission process to the surrounding ground of a longitudinal vibration. It is a schematic block diagram of the virtual vibration experience system of this invention. It is a perspective view of a head-mounted display. It is a perspective view of the vibration generator. It is a perspective view which shows the implementation state of the vibration experience test. It is a perspective view of the sweating measuring device. It is a perspective view of the electroencephalogram measuring device. It is a perspective view of the cerebral blood flow measuring device. It is a figure which shows the vibration grudge limit. It is a figure which shows the difference of discomfort by vibration acceleration. It is a figure which shows the difference of discomfort by vibration acceleration. It is a figure which shows the difference of discomfort by vibration acceleration.

A preferred embodiment of the virtual vibration experience system of the present invention will be described in detail below with reference to the drawings.

As shown in FIG. 2, the virtual vibration experience system 100 includes an image generation device 10, a vibration generator 20, a body experience measurement device 30, and a vibration measurement device 40.

The image generation device 10 is composed of a head-mounted display (HMD) 11 as shown in FIG.

The head-mounted display 11 is a goggle-type display device capable of displaying a virtual reality (VR) image, and as shown in FIG. 3, the projection unit 11a is on the front portion and the viewing portion 11b is on the side surface portion. Is arranged.

When the subject P attaches the head-mounted display 11 to the head, an image composed of virtual reality is displayed on the projection unit 11a, and a predetermined sound is generated from the viewing unit 11b.

As shown in FIG. 4, the vibration generator 20 includes a shaking table 21, a vibration generating device 22, and a vibration control device 23.

The shaking table 21 has a flat upper surface so that the subject P can surely stand upright.

The vibration generator 22 is designed so that the lower surface of the shaking table 21 can be firmly fixed to the upper surface thereof, and the vibration members arranged inside the vibration generating device 22 are in the vertical direction, the horizontal direction, or the vertical and horizontal directions in which they are combined. It is designed to vibrate with appropriate frequency and amplitude.

The vibration control device 23 can drive and control the vibration generation device 22 so as to vibrate for a predetermined time with an appropriate frequency and amplitude.

Therefore, by operating the vibration generator 22 and driving the vibration member, the upper surface of the vibration generator 22 vibrates in the vertical direction, the horizontal direction, or the vertical and horizontal directions in which they are combined, with appropriate frequencies and vibrations. Correspondingly, the shaking table 21 also vibrates in the vertical direction, the horizontal direction, or a combination thereof in the vertical and horizontal directions with a predetermined frequency and amplitude.

As shown in FIG. 5, the bodily sensation measuring device 30 is attached to the body of the subject P standing upright on the shaking table 21 to quantitatively measure the phenomena and sensations that occur in the human body, and various biological sensors are used. The on-board measuring device can be used.

FIG. 6 is a sweating measuring device 31, and by fixing the sweating sensor 31a connected to the tip of the cord 31b to the palm of the subject P, the sweating amount of the subject P when the virtual vibration is generated. Can be measured.

FIG. 7 is an electroencephalogram measuring device 32, which is equipped with an electroencephalogram sensor 32a in the headset, and by wearing the headset on the head of the subject P, the subject P at the time of virtual vibration generation. It is possible to measure the brain waves of.

FIG. 8 shows a cerebral blood flow measuring device 33, which includes an irradiation device 33a equipped with a light emitting diode that emits near-infrared light (about 800 nm) and a photodiode that detects reflected light transmitted through the brain. The detection device 33b provided is embedded in the headset. By wearing the headset on the forehead of the subject P, it is possible to measure the cerebral blood flow of the subject P when the virtual vibration occurs.

The bodily sensation measuring device 30 is not limited to the above, and is equipped with a sensor for measuring electrocardiogram, heart rate, respiratory rate, etc., and an appropriate biometric measuring device that can be easily attached to the subject P should be used. You may do it.

As shown in FIG. 5, the vibration measuring device 40 includes an accelerometer 41 that can be appropriately attached.

As shown in FIG. 5, the accelerometer 41 is attached to the central portion of the upper surface of the shaking table 21 and the body side of the subject P, and during the virtual vibration test, the actual shaking table 21 and the subject P are in the vertical or horizontal direction. Acceleration can be measured.

The virtual vibration experience system 100 of the present invention has the above configuration and is set and used as follows.

First, as shown in FIG. 4, a vibration generator 20 including a shaking table 21, a vibration generating device 22, and a vibration control device 23 is arranged at an appropriate position on the floor surface.

Next, as shown in FIG. 5, the subject P is made to stand upright on the shaking table 21, the head-mounted display 11 is attached to the head of the subject P, and the sweat sensor connected to the tip of the sweat measurement device 31 on the palm. Fix 31a.

Further, as shown in FIG. 5, an accelerometer 41 is attached to the central portion of the upper surface of the shaking table 21 and the body side portion of the subject P.

Next, the virtual vibration experience system 100 is operated, the image visually recognized in front of the shaking table 21 is displayed on the head-mounted display 11, and the sound generated due to the virtual vibration is generated.

At the same time, the vibration generator 22 is operated to vibrate the vibrating member in the vertical direction, the horizontal direction, or the vertical and horizontal directions in which they are combined with appropriate frequencies and amplitudes, thereby causing the shaking table 21 to vibrate in the vertical direction. , Horizontally or a combination of them vertically and horizontally at a predetermined frequency and amplitude.

As a result, the subject P causes a feeling as if he / she is experiencing actual vertical / horizontal or a combination of vertical and horizontal vibrations, particularly vertical glue vibration, and the amount of sweating. It develops physical phenomena and sensations that are not normally seen, such as an increase in heart rate and respiratory rate, and a peculiar shape of brain waves.

Then, these physical phenomena and sensations can be quantitatively measured with the passage of time by the bodily sensation measuring device 30, and are acquired as bodily sensation data when virtual vibration occurs, especially when virtual vertical vibration occurs. Can be collected.

Here, if the vibration control device 23 transmits a vibration data signal of a certain frequency and acceleration to the vibration generation device 22, the vibration table 21 can be vibrated in the corresponding vibration mode.

Then, by variously changing the subject P, it is possible to acquire the experience data corresponding to each vibration mode in consideration of characteristics such as age, sex, height, and weight.

As described above, the experience data quantitatively measured by the subject P's virtual vibration experience, particularly the virtual vertical vibration experience, can be input, recorded, and collected in a computer.

Then, by appropriately processing the collected bodily sensation data, objective data regarding the phenomenon and sensation experienced by the subject P can be collected, and based on the data, it is appropriate for vibration, particularly vertical vertical vibration. It is possible to determine the vertical rigidity of a structural floor.

[Vertical vibration experience test]
Next, using the virtual vibration experience system 100, a vertical vibration experience test was conducted to grasp the relationship between the vertical vibration of the structural floor and the discomfort caused by the viewer P.

As shown in FIG. 5, with the subject P standing upright on the shaking table 21, the vibration generator 22 changes the frequency to 2.3 Hz and the acceleration to 20 gal, 30 gal, and 50 gal in the vertical direction. Vibration was generated.

We asked 24 subjects P to wear a head-mounted display 11 and conducted a test in a VR space consisting of video and music in a state where the concert environment was reproduced, and had subjects P experience virtual vertical vibration. rice field.

Then, it was decided to grasp the relationship between the vertical vibration and the discomfort by conducting a questionnaire survey of the subject P about the vibration grudge limit and the discomfort level at this time.
As the level of discomfort, an index as shown in Table 1 was set.

When the test was conducted in an upright position for the vibration of 2.3 Hz, which is the frequency band where vertical vibration is likely to occur, the question was "how much vibration can be tolerated as the floor of a music facility?" , The answers shown in FIG. 9 were obtained.

Moreover, when the discomfort of the subject P at each vibration acceleration of 20 gal, 30 gal, and 50 gal was summarized, the results shown in FIGS. 10 to 12 were obtained. According to this, it was found that the discomfort increased at once when the amount reached 50 gal.

As described above, according to the virtual vibration experience system 100 of the present invention, it is possible to simulate the phenomenon caused when vibration occurs, especially when vertical vibration occurs, and the phenomenon and sensation generated in the human body at that time can be simulated. Can be experienced virtually and can be measured quantitatively.
This makes it possible to determine the vertical stiffness of the structural floor that is appropriate for vibrations, especially longitudinal vibrations.

Not only can the vertical rigidity of the structural floor be determined to be appropriate for vertical vibration, but also when setting the design reference values for the vertical and horizontal vibrations of surrounding buildings that occur during vertical vibration. Can also be applied.

In addition, vertical and horizontal vibrations in high-rise buildings during earthquakes, especially long-period earthquakes, vertical and horizontal vibrations due to the movement of transportation such as trains, buses, and automobiles, vertical vibrations due to human walking, and further. It can also be applied when setting design standard values for habitability in a building against horizontal vibration during a storm.

100 Virtual vibration experience system 10 Image generator 11 Head-mounted display 20 Vibration generator 21 Vibration table 22 Vibration generator 23 Vibration control device 30 Experience measurement device 31 Sweating measurement device 32 Brain wave measurement device 33 Brain blood flow measurement device P Subject

Claims (8)

An image generator that generates images when virtual vibrations occur, a vibration generator that generates vibrations when virtual vibrations occur, and a sensory measurement device that measures the phenomena and sensations that occur in the subject's human body when virtual vibrations occur. A virtual vibration experience system characterized by being composed of a vibration measuring device that measures vibration when virtual vibration occurs. The virtual vibration experience system according to claim 1, wherein the virtual vibration is a virtual vertical vibration, a virtual horizontal vibration, or a virtual vertical and horizontal vibration in combination thereof. The vibration experience system according to claim 1, wherein the virtual vibration is a virtual vertical vibration. The virtual vibration experience system according to any one of claims 1 to 3, wherein the image display device is composed of a head-mounted display to be attached to a subject. The vibration generator is characterized by being composed of a shaking table on which the subject stands upright and a vibration generating device that vibrates the shaking table in the vertical direction, the horizontal direction, or a combination thereof in the vertical and horizontal directions. The virtual vibration experience system according to any one of claims 1 to 4. The device according to any one of claims 1 to 5, wherein the bodily sensation measuring device is a measuring device equipped with a biological sensor that is attached to the body of a subject and quantitatively measures phenomena and sensations that occur in the human body. Described virtual vibration experience system. The sixth aspect of claim 6 is characterized in that the bodily sensation measuring device is a sweating measuring device capable of measuring the amount of sweating of a subject by connecting a sweating sensor to a tip portion and fixing the sweating sensor to the palm of the subject. Virtual vibration experience system. The virtual vibration experience system according to any one of claims 1 to 7, wherein the vibration measuring device is an accelerometer capable of measuring the acceleration of the shaking table by being mounted on the shaking table.

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