KR102124748B1 - Collision prevention method for user of virtual reality system - Google Patents

Abstract

The present invention relates to a method for sensing and preventing a risk of a user in an experience space experiencing virtual reality content, which is to previously sense and prevent a collision with an obstacle by a player who experiences virtual reality, and to prevent the player from moving outside a preset content area. To this end, the method of the present invention comprises the steps of: setting, by an area setting unit, an activity area and a risk area of a character operated to correspond to the movement of a user in an experience space experiencing virtual reality content; setting, by a safe effective area setting unit, a safe effective area of the character by receiving information in accordance with a user′s body type; searching for, by a position and posture search unit, the current position and posture information of a character which moved in the experience space; and sensing and notifying, by a risk sensing unit, the presence of the risk on the basis of the activity area and risk area of the character, the safe effective area of the character, the current position and posture information on the character, and obstacle information.

Description

{Collision prevention method for user of virtual reality system} in the experience space to experience virtual reality content

The present invention relates to a method for detecting and preventing a user's risk in an experience space where virtual reality content is experienced, and more specifically, detecting and preventing an obstacle collision of a player experiencing virtual reality in advance and out of a preset content area. It relates to a method for detecting and preventing a user's risk in an experience space where virtual players are prevented from moving.

Since most of the perception of the surrounding danger originates from visual information, it is necessary to recognize the risk factors by the surrounding environment in a virtual reality (VR) environment wearing a head mounted display (HMD) that completely blocks the user's view. It is possible to provide visual information by placing a virtual object such as a real space in the virtual reality, but the movement of the player's body cannot fully match the real space and the virtual reality environment. This has a problem that can pose a significant risk, such as an obstacle collision, to the virtual reality experience player.

Republic of Korea Patent Registration No. 10-1659782 (Name of the invention: a method for providing 3D indoor spatial information from the user's point of view considering wall collision)

Therefore, the present invention was created to solve the problems as described above, and the safety effective area of the character is designated as a cylinder based on the central area of the character, and the safety effective area of the character and the position and danger of the current character It is an object of the present invention to identify whether a collision with an expected area (for example, a buffer area of an obstacle) occurs, and to inform a player of a collision risk or a content area departure risk.

However, the objects of the present invention are not limited to the objects mentioned above, and other objects not mentioned will be clearly understood by those skilled in the art from the following description.

The above-described object of the present invention is to set an activity area and a danger area of a character operating in correspondence with a user's movement in an experience space where the area setting unit experiences virtual reality content, and the safety effective area setting unit is configured to Setting the safe effective area of the character by receiving the information according to the step, the position and posture search unit searches the current position and posture information of the character moving in the experience space, and the risk detection unit is the set activity area and the danger area of the character , Detecting and notifying whether a danger is based on the safe effective area of the character, the current position and posture information of the character, and obstacle information, and detecting the danger of the user in the experience space experiencing the virtual reality content, This can be achieved by providing a method of prevention.

According to the present invention as described above, the safe effective area of the character is designated as a cylinder, and whether the overlap between the safe effective area of the character and the current position of the character and the area where danger is expected (eg, a buffer area of an obstacle) occurs. This has the effect of notifying the player about the risk of collision or the risk of leaving the content area.

The following drawings attached to the present specification illustrate a preferred embodiment of the present invention, and serve to further understand the technical spirit of the present invention together with the detailed description of the present invention, and therefore the present invention is limited to those described in those drawings. It should not be construed limitedly.
1 and 2 is a schematic diagram of a collision detection and prevention device in the experience space to experience the virtual reality content according to an embodiment of the present invention,
3 is a diagram schematically showing an experience space for experiencing virtual reality content according to an embodiment of the present invention,
4 and 5 are diagrams for setting a safe effective area of a character or a user and collecting posture information according to an embodiment of the present invention,
6 is a view showing that a user or character according to an embodiment of the present invention deviates from an activity area and informs a user of a danger signal,
7 is a view showing a user or a character according to an embodiment of the present invention to inform the user of a danger signal in advance when approaching from the north of the obstacle and colliding with the obstacle;
8 is a view showing a user or a character according to an embodiment of the present invention approaching from the left side of an obstacle and notifying the user of a danger signal in advance when colliding with the obstacle;
9 is a view showing a user or a character according to an embodiment of the present invention to inform the user of a danger signal in advance when approaching the vertex of the obstacle and colliding with the obstacle;
10 is a diagram showing that a danger signal is generated when a user or character passes under an obstacle according to an embodiment of the present invention.

Hereinafter, a preferred embodiment of the present invention will be described with reference to the drawings. In addition, the embodiment described below does not unduly limit the content of the present invention as set forth in the claims, and the entire configuration described in this embodiment cannot be said to be essential as a solution to the present invention. In addition, descriptions that are apparent to those skilled in the art and those skilled in the art may be omitted, and descriptions of the omitted components (methods) and functions may be sufficiently referenced without departing from the technical spirit of the present invention.

A method and apparatus for detecting and preventing a user's risk in an experience space for experiencing virtual reality content according to an embodiment of the present invention may be worn while wearing a head mounted display (HMD) and experiencing virtual reality content. It is a method and apparatus for notifying a danger when a user moves out of a set area or an obstacle appears on virtual reality content. Hereinafter, a method and apparatus for detecting and preventing danger of a user in an experience space for experiencing virtual reality content according to an embodiment of the present invention will be described with reference to the accompanying reference drawings.

As shown in FIG. 3, an HMD user or a wearer (hereinafter referred to as a user) may move within the virtual reality content experience space 110. Therefore, the user may be referred to as a virtual reality experience player. At this time, the active area in which the user is active includes the safe area 111 and the buffer area 112, and the dangerous area 113 is a dangerous area in which the user deviates from the set boundary of content in the virtual experience space. The danger zone 113 is an example, as shown in FIG. 3, the walls 131, 132, 133, 134, or not shown in the drawing, but means an area outside the set boundary of the content. There may be an obstacle 120 in the virtual experience space, and the user must move away from the obstacle 120. The obstacle 120 may be created to have a certain height and area, and may be placed on the floor or suspended from the ceiling.

The region setting unit 210 illustrated in FIG. 1 sets the character's activity regions 111 and 112 and the danger region 113 that correspond to a user's movement within the experience space 110 for experiencing virtual reality content. The activity areas 111 and 112 of the character may be defined by Equation 1 described later. The activity areas 111 and 112 and the danger area 113 are already created at the time of production of the virtual reality experience content, and each coordinate can be arbitrarily obtained. As described above, it is necessary to detect the danger so that the user wearing the HMD does not avoid the obstacle 120 shown in the virtual reality experience content or moves to the danger area 113, and will be described in detail below.

Next, the safety effective area setting unit 220 receives information according to the user's body type from the user's body measurement unit 300 to set the safety effective area 141 of the character. The safety effective area setting unit 220 includes a width setting unit 221 and a length setting unit 222. The width setting unit 221 sets the width w of the safety effective area 141 as shown in FIG. 4, and the length setting unit 222 determines the length or height h of the safety effective area 141. Set. The safe effective area 141 is the safe effective range of the user or character, and the width w is calculated based on when the user has the most open arms, and the height or length h is self-extension if the user does not extend the arm. When the user extends the arm upward, the height is added to the height (h) (approximately calculated as 130% of the height), and also when the user bows or bends as shown in FIG. Depending on how much the user's head goes down, it becomes the height to the ground and head. In addition, the safe effective area setting unit 220 changes the safe effective area 141 according to the current situation based on the current posture information of the character provided by the position and posture search unit 230.

The user terminal 400 illustrated in FIG. 1 includes an HMD unit 410 and a controller unit 420. The HMD unit 410 is a device worn by the user on the head and transmits three-dimensional coordinates corresponding to the user's current location and posture to the location and posture search unit 230. In addition, the controller unit 420 is a user holding one hand or both hands and carrying it, generates a three-dimensional coordinate that can know when the user extends the arm and transmits it to the position and posture searcher 230.

Next, the location and posture search unit 230 is a user moving in the experience space through the three-dimensional coordinates provided by the HMD unit 410 and the controller unit 420, respectively, whether the head is bowed or an arm is extended. The user's current position coordinates and the user's posture can be grasped.

Next, the danger detection unit 240 is based on the set character's activity area (111,112) and the danger area 113, the character's safety effective area 141, the character's current position and posture information and obstacle information to determine whether it is dangerous. Detect. At this time, the safe effective area 141 of the character may be continuously changed as described above.

The risk detector 240 includes first, second and third risk detectors 241, 242 and 243 as shown in FIG. 6.

The first danger detection unit 241 detects the first danger based on the character's active areas 111 and 112 and the danger area 113 and the character's safety effective area 141. That is, the first danger detector 240 detects that the current coordinates of the character are in the safe area by the following equations (1, 2, 3).

[Equation 1]

The character's active area is defined by Equation 1, where x _pg0 and y _{pg0 denote} the x- and y-components of the center coordinates of the character's active area, w _pg is the length of the x-axis of the character's active area, and h _pg is The y-axis length of the character's active area, x _pg and y _pg are two-dimensional coordinates, which are arbitrary coordinates within the character's active area.

In addition, the "∧" mark included in the equation means "and condition" satisfying each condition.

[Equation 2]

The character's safe effective area is defined by Equation 2, where x _uo and y _uo denote the x and y components of any point in the character's safe effective area, and x _u and y _u represent the character's current x coordinate. y coordinate, h _u represents the user's height

[Equation 3]

Equation 3 is derived by Equation 1 and Equation 2, and when Equation 3 is satisfied, it indicates that the current coordinates of the character are in the safe area 111. Therefore, if Equation 3 is not satisfied, the first risk detector notifies the user of the danger.

The second danger detecting unit 242 detects whether the second danger is based on the current position and posture information of the character, obstacle information, and the obstacle buffer areas 121, 122, and 123. The second danger detection includes first, second, and third detection.

The first buffer area generating unit 261 generates the first obstacle buffer area 121 in the vertical direction of the obstacle 120 based on the obstacle information and the current position and posture information of the character, as shown in FIG. 7, The second risk detection unit 242 performs a first detection informing the user of the risk by the following equation (4). At this time, the first obstacle buffer region 121 is generated longer than the length of the obstacle 120 as shown in FIG. 7. In addition, although FIG. 7 has been described as an example in which the user approaches from the north side of the obstacle 120, the same principle may be applied to the user approaching from the south side of the obstacle 120 as well.

[Equation 4]

The first obstacle buffer area 121 is defined by Equation 4, and when the Equation 4 is satisfied, the second risk detection unit 242 is the current position of the character is located in the first obstacle buffer area 121. The user is informed of the danger through the first detection.

In Equation 4 and Equation 5 and Equation 6 described below, x _u and y _u represent the x and y coordinates of the character's current position, respectively, and x _dz0 and y _dz0 are the x coordinates of the center of the obstacle, respectively. And y coordinates, w _dz represents the lateral length of the obstacle, d _dz represents the vertical length of the obstacle, and h _u represents the height of the user.

The second buffer area generation unit 262 generates a second obstacle buffer area 122 in the horizontal direction of the obstacle 120 based on the obstacle information and the current position and posture information of the character, as shown in FIG. 8, The second risk detection unit 242 performs a second detection informing the user of the risk by the following equation (5). At this time, the second obstacle buffer area 122 is generated a little wider than the width of the obstacle 120 as shown in FIG. 8. In addition, although FIG. 8 has been illustrated as an example in which the user approaches from the left side of the obstacle 120, the same principle may be applied to the user approaching from the right side of the obstacle 120 as well.

[Equation 5]

The second obstacle buffer area 122 is defined by Equation 5, and when the Equation 5 is satisfied, the second danger detection unit 242 is the character's current position as being located in the second obstacle buffer area 122. The user is informed of the danger through the second detection.

The third buffer area generating unit 263 generates a third obstacle buffer area 123 around the vertex of the obstacle 120 based on the obstacle information and the current position and posture information of the character, and the second danger detection unit ( 242) performs a third detection informing the user of the danger by the following equation (6). At this time, the third obstacle buffer area 123 may be generated at all of the vertices of the obstacle 120, as shown in FIG. 9, and when the user approaches any of the vertices of the four obstacles 120, Equation 6 Through this, you can detect the danger. In addition, although FIG. 9 has been described as an example in which the user approaches the third obstacle buffer area 123a, the approach of the third obstacle buffer area 123b, 123c, and 123d can also sense the danger.

[Equation 6]

The third obstacle buffer area 123 is defined by Equation 6, and when the equation 6 is satisfied, the current position of the character is located in the third obstacle buffer area 123, and the second risk detection unit 242 is The third detection is used to inform the user of the danger.

As illustrated in FIG. 10, the third danger detector 243 detects whether the third danger is based on obstacle information and a safe effective area of the character. In FIG. 10, it is assumed that the obstacle 120 is suspended from the ceiling, and an example in which the user intends to pass under the obstacle 120 is given. The third risk detector 243 is limited to detecting at least one of the first, second, and third risks through the above-described equations 4, 5, and 6 to detect the third risk. The third risk detector 243 detects whether the third risk is based on Equation 7 below.

[Equation 7]

z _dz0 represents the z-axis coordinate of the center of the obstacle, h _dz represents the height of the obstacle, and h _uc represents the height of the current character safety effective area.

If one or more of Equations 4 to 6 is satisfied and Equation 7 is satisfied, the third danger detection unit 243 notifies the user of the danger as the safety effective area 141 of the character has entered the obstacle area.

When Equation 7 is described with reference to FIG. 10, if the height of the safe effective area 141 of the character is higher than the lower surface of the obstacle 120, it is determined that the obstacle area, which is a dangerous area, has been entered.

In the description of the present invention, descriptions that are obvious to those skilled in the art and those skilled in the art may be omitted, and descriptions of the omitted components (methods) and functions may be sufficiently referenced without departing from the technical spirit of the present invention. Will be able to. In addition, the above-described components of the present invention have been described for convenience of description of the present invention, and components not described herein may be added within a range not departing from the technical spirit of the present invention.

Descriptions of the components and functions of the above-described parts have been described separately from each other for convenience of description, and if necessary, any one component and function may be integrated into other components, or may be implemented in a more detailed manner.

As described above, with reference to one embodiment of the present invention, the present invention is not limited to this, and various modifications and applications are possible. That is, those skilled in the art will readily understand that many modifications are possible without departing from the gist of the present invention. In addition, it should be noted that when it is determined that a detailed description of a known function related to the present invention and its configuration or a coupling relationship for each configuration of the present invention may unnecessarily obscure the subject matter of the present invention, the detailed description is omitted. something to do.

110: virtual reality content experience space
111: safety area (activity area)
112: buffer area (active area)
113: danger zone
120: obstacle
121: first obstacle buffer area
122: second obstacle buffer area
123, 123a, 123b, 123c, 123d: 3rd obstacle buffer area
131,132,133,134: Wall
140: virtual reality content experience or user
141: Character safety effective area
200: server unit
210: area setting unit
211: Character's activity area setting unit
212: Character's danger zone setting unit
220: Character safety effective area setting unit
221: width setting unit
222: length setting unit (or height setting unit)
230: position and posture search unit
240: danger detection unit
241: first risk detection unit
242: second risk detection unit
243: third risk detection unit
250: Obstacle information acquisition unit
260: obstacle buffer area generation unit
261: first buffer region generation unit
262: second buffer area generation unit
263: 3rd buffer area generation unit
270: control unit
300: user body measurement unit
400: user terminal
410: HMD unit
420: controller unit

Claims (8)

The step of setting the activity area and the danger area of the character that corresponds to the user's movement in the experience space where the area setting unit experiences the virtual reality content,
The safe effective area setting unit receives information according to the user's body type, and sets a safe effective area of the character.
The position and posture search unit searches the current position and posture information of the character moving in the experience space, and
The danger detection unit includes a step of detecting and notifying whether a danger is based on the set activity area and danger area of the character, the safety valid area of the character, the current position and posture information of the character, and obstacle information,
The position and posture search unit,
Searching the current position and posture information of the character by receiving 3D coordinates from the head mounted display worn by the user and the controller unit held by the user in both hands,
The safe effective area of the character,
It is changed according to the current situation based on the current posture information of the character provided by the position and posture search unit,
The first risk detection unit of the risk detection unit,
A first danger is detected based on the activity area and the danger area of the character and the safety effective area of the character,
The second risk detection unit of the risk detection unit,
Detecting a second danger based on the current position and posture information of the character, obstacle information, and an obstacle buffer area,
The third danger detection unit of the danger detection unit,
A third danger is detected based on the obstacle information and the safety effective area of the character,
The second danger detection,
The first buffer area generating unit is the first detection based on the first obstacle buffer area in which the buffer area is generated in the vertical direction of the obstacle based on the obstacle information and the current position and posture information of the character,
The second buffer area generating unit is the second detection based on the second obstacle buffer area in which the buffer area is generated in the horizontal direction of the obstacle based on the obstacle information and the current position and posture information of the character,
It is a third detection based on the third obstacle buffer area where the third buffer area generation unit creates a buffer area around the vertex of the obstacle based on the obstacle information and the current position and posture information of the character,
The first risk detection unit,
A method for detecting and preventing a user's risk in an experience space experiencing virtual reality content, characterized in that the character's current coordinates are within a safe area by the following equations (1, 2, 3).
[Equation 1]

The character's active area is defined by Equation 1, where x _pg0 and y _{pg0 denote} the x- and y-components of the center coordinates of the character's active area, w _pg is the length of the x-axis of the character's active area, and h _pg is The y-axis length of the character's active area, x _pg and y _pg are two-dimensional coordinates, which are arbitrary coordinates within the character's active area.
[Equation 2]

The safe effective area of the character is defined by Equation 2, where x _uo and y _uo represent the x and y components of any point in the character's safe effective area, and x _u and y _u are the current x coordinates of the character. y coordinate, h _u represents the user's height
[Equation 3]

It is defined by Equation 3 that the current coordinates of the character are in the safe area.
delete delete delete According to claim 1,
The third risk detection unit,
A method for detecting and preventing a user's risk in an experience space experiencing virtual reality content, which is limited to detecting at least one of the first, second, and third risks and detects whether the third risk exists .
delete The step of setting the activity area and the danger area of the character that corresponds to the user's movement in the experience space where the area setting unit experiences the virtual reality content,
The safe effective area setting unit receives information according to the user's body type, and sets a safe effective area of the character.
The position and posture search unit searches the current position and posture information of the character moving in the experience space, and
The danger detection unit includes a step of detecting and notifying whether a danger is based on the set activity area and danger area of the character, the safety valid area of the character, the current position and posture information of the character, and obstacle information,
The position and posture search unit,
Searching the current position and posture information of the character by receiving 3D coordinates from the head mounted display worn by the user and the controller unit held by the user in both hands,
The safe effective area of the character,
It is changed according to the current situation based on the current posture information of the character provided by the position and posture search unit,
The first risk detection unit of the risk detection unit,
A first danger is detected based on the activity area and the danger area of the character and the safety effective area of the character,
The second risk detection unit of the risk detection unit,
Detecting a second danger based on the current position and posture information of the character, obstacle information, and an obstacle buffer area,
The third danger detection unit of the danger detection unit,
A third danger is detected based on the obstacle information and the safety effective area of the character,
The second danger detection,
The first buffer area generating unit is the first detection based on the first obstacle buffer area in which the buffer area is generated in the vertical direction of the obstacle based on the obstacle information and the current position and posture information of the character,
The second buffer area generating unit is the second detection based on the second obstacle buffer area in which the buffer area is generated in the horizontal direction of the obstacle based on the obstacle information and the current position and posture information of the character,
It is a third detection based on the third obstacle buffer area where the third buffer area generation unit creates a buffer area around the vertex of the obstacle based on the obstacle information and the current position and posture information of the character,
The second risk detection unit,
A method for detecting and preventing a user's risk in an experience space for experiencing virtual reality content, characterized in that the first, second, and third detection is performed by the following equations 4, 5, and 6.
[Equation 4]

The first obstacle buffer area is defined by Equation 4, and when the equation 4 is satisfied, the current position of the character is located in the first obstacle buffer area, so that the second danger detection unit performs the first detection,
[Equation 5]

The second obstacle buffer area is defined by Equation 5, and when the equation (5) is satisfied, the current position of the character is located in the second obstacle buffer area, and the second danger detection unit performs the second detection,
[Equation 6]

A third obstacle buffer area is defined by Equation (6), and when the equation (6) is satisfied, the current position of the character is located in the third obstacle buffer area, so that the second danger detection unit performs the third detection,
In equations 4,5,6, x _u and y _u represent the x and y coordinates of the character's current position, respectively, x _dz0 and y _dz0 are the center x and y coordinates of the obstacle, respectively, and w _dz is the obstacle. The horizontal length of, d _dz represents the vertical length of the obstacle, and h _u represents the height of the user.
The method of claim 5,
The third risk detection unit,
A method for detecting and preventing a user's risk in an experience space experiencing virtual reality content, characterized in that the third risk is detected by the following equation (7).
[Equation 7]

z _dz0 represents the z-axis coordinate of the center of the obstacle, h _dz represents the height of the obstacle, and h _uc represents the height of the current character safety effective area.

Images