JP2015066624A - Robot control system, robot control program, and explanation robot - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable smooth start of explanation of highlight parts of a display by properly selecting the explanation position for an explanation robot.SOLUTION: In a robot control system including an explanation robot 10 and a central control device, the explanation robot 10 approaches a visitor and explains highlight parts of displayed objects X1, X2, and X3. The central control device comprises highlight spot storage means, and robot position selection means, etc. The highlight spot storage means stores predetermined highlight spots for the displayed objects X1, X2, and X3. The robot position selection means selects an explanation position that is to be a standing position at which the explanation robot 10 explains the displayed objects X1, X2, and X3, on the condition that the explanation position is a position outside the highlight spots and located at a position that does not block a path for the visitor from a current position of the visitor to the highlight spots.

Description

  The present invention relates to a robot control system, a robot control program, and an explanation robot. More particularly, the present invention relates to a robot control system, a robot control program, and an explanation robot for explaining exhibits to visitors, for example, in a science museum.

  Conventionally, a technology for causing an explanation robot to explain an exhibit to a visitor at a science museum or the like is known.

  For example, in Patent Document 1, when a visitor requests an explanation of an exhibit, it moves to the vicinity of the exhibit instructed by the visitor and provides information on the exhibit using pointing and utterances. An information providing apparatus to perform is disclosed. Further, in Patent Document 2, when the exhibit that the visitor is paying attention to at the present time is described, the visitor moves to a position where the exhibit is not blocked to block the visitor's line of sight. There has been disclosed a movement explanation device for explaining an exhibit without any problem.

JP 2010-231315 A [G06Q 50/00] JP 2009-285818 A [B25J 13/08]

  For a visitor who has not received an explanation of an exhibit or who has not seen the highlight part of the exhibit, in order for the explanation robot to start explaining the highlight part, first, the highlight part is visually checked. It is necessary to guide the visitor to a position where he can, and to work on the visitor from the explanation robot so that the attention of the visitor is directed to the highlight. However, a technique for smoothly starting the explanation of the exhibit to the visitor, such as a method for determining the explanation position (standing position) of the explanation robot suitable for engaging with the visitor, has not yet been established.

  Therefore, a main object of the present invention is to provide a novel robot control system, a robot control program, and an explanation robot.

  Another object of the present invention is to provide a robot control system, a robot control program, and an explanation robot capable of smoothly starting explanation of exhibits.

  A first invention is a robot control system including an explanation robot for explaining an exhibit to a visitor, and stores a highlight area set in advance for an area where a highlight portion of the exhibit is easy to see Storage means, visitor position acquisition means for acquiring the current position of the visitor, a position other than the highlight area set in the exhibit and from the current position of the visitor acquired by the visitor position acquisition means to the relevant highlight area The robot position selection means for selecting the explanation position when the explanation robot explains the exhibit on the condition that the visitor's passage is not blocked, the explanation position selected by the robot position selection means A movement control means for moving the explanation robot, a guidance action control means for causing the explanation robot to perform a guidance action that prompts the visitor to move to the highlight area, and a visitor's attention Comprising a target behavior control means for executing the described robot attentive action to direct attractions portion of 示物 a robot control system.

  In the first invention, the robot control system includes an explanation robot. For example, when there is a visitor who has not received the explanation of the exhibit, the explanation robot attracts the visitor's attention by acting on the visitor. After pointing to the highlight part, the highlight part will be explained. The highlight area storage means stores a highlight area preset for the exhibit. The highlight area is set for an area in which the highlight portion of the exhibit is easy to see. However, the highlight part of the exhibit may be the entire exhibit. The visitor position acquisition means acquires the current position of the visitor. The robot position selection means is a position that can explain the highlight part of the exhibit, that is, a position that is not unnatural even if the explanation robot explains the highlight part, and is at least a position other than the highlight area, and An explanation position (standing position) when the explanation robot explains the exhibit is selected on the condition that the visitor's path from the current position of the visitor to the highlight area is not blocked. The movement control means moves the explanation robot to the explanation position selected by the robot position selection means. The guidance behavior control means causes the explanation robot to perform guidance behavior that prompts the visitor to move to the highlight area, for example, “Please come over here”. The attention behavior control means explains the attention behavior for directing the attention of the visitor to the highlight portion of the exhibit, for example, the utterance “Please look there” while pointing at the highlight portion Y of the exhibit X. Let the robot execute it.

  According to the first invention, on the condition that it is a position other than the highlight area set in the exhibition in advance and is a position that does not block the path of the visitor from the current position of the visitor to the highlight area, Since the explanation position of the explanation robot is selected, the explanation robot can smoothly guide the visitor to a position where it is easy to see the highlight part of the exhibit without disturbing the visitor's movement. In addition, since the visitor is guided to a position where the highlight portion Y of the exhibit X is easy to see, it is easy to direct the visitor's attention to the highlight portion. Therefore, the explanation of the highlight part of the exhibit can be started smoothly.

  The second invention is dependent on the first invention and further comprises explanation candidate point storage means for storing a plurality of explanation candidate points set in advance in an area where the highlight part of the exhibit can be explained, and the robot position The selection means selects an explanation position from the explanation candidate points stored in the explanation candidate point storage means.

  In 2nd invention, the description candidate point memory | storage means which memorize | stores the some description candidate point preset with respect to an exhibit is further provided. The explanation candidate points are set in an area where the highlight part of the exhibit can be explained, that is, an area that is not unnatural even if the explanation robot explains the highlight part. The robot position selection means selects an explanation position from among a plurality of explanation candidate points in consideration of, for example, the surrounding situation of the exhibit.

  A third invention is dependent on the second invention, and is a first angle formed by a distance between an explanation candidate point and a highlight part of the exhibit, and a central part of the highlight area and the explanation candidate point starting from the highlight part of the exhibit. And usefulness calculation means for calculating the usefulness of the explanation candidate points based on at least one of the second angles formed by the central part of the highlight area and the current position of the visitor starting from the highlight part of the exhibit The robot position selecting means selects the explanation candidate point having the highest usefulness calculated by the usefulness calculating means as the explanation position.

  In 3rd invention, the usefulness calculation means which calculates the usefulness of an explanation candidate point is provided based on at least 1 of the distance between a description candidate point and the highlight part of an exhibit, a 1st angle, and a 2nd angle. Here, the first angle indicates an angle formed by the central part of the highlight area and the explanation candidate point based on the highlight part of the exhibit, and the second angle indicates the central part of the highlight area based on the highlight part of the exhibit. And the current position of the visitor. The robot position selection means selects the explanation candidate point having the highest usefulness as the explanation position.

  According to the third aspect, the explanation position of the explanation robot can be appropriately selected from a plurality of explanation candidate points.

  The fourth invention is dependent on the second or third invention, and the explanation candidate points stored in the explanation candidate point storage means are set for an area that can be explained using pointing.

  In the fourth invention, the explanation candidate points set in advance in the exhibit are set in a region where the explanation robot can point and explain, that is, in a region where it is not unnatural even if the explanation with the pointing is performed. Is done. As a result, the explanation position of the explanation robot is selected from the positions where the finger can be pointed.

  According to the fourth invention, if there is no other safety problem, the explanation robot can surely execute the explanation with pointing.

  The fifth invention is dependent on any one of the first to fourth inventions, and a situation in which it is determined whether or not the explanation robot is capable of pointing after the explanation robot has moved to the explanation position by the movement control means. A determination means, and when the situation determination means determines that the pointing action is possible, the attention behavior control means causes the explanation robot to execute the attention action by the utterance accompanied by the pointing and the pointing action by the situation determination means. When it is determined that the situation is not possible, the explanation robot is caused to perform attention behavior by utterance without pointing.

  According to a fifth aspect of the invention, there is provided situation determination means for determining whether or not the explanation robot is capable of pointing before the explanation robot starts explanation at the explanation position. For example, when there is a safety problem due to other visitors around the explanation robot, the situation judgment means judges that it is impossible to point, and the explanation robot is in a position where it can be pointed and If there is no safety problem, it is determined that pointing is possible. The attention behavior control means causes the explanation robot to execute attention behavior by utterance with pointing when the pointing is possible, and performs attention behavior by utterance without pointing when the pointing is not possible. Explanation Let the robot execute.

  A sixth invention is a robot control program executed on a computer of a robot control system including an explanation robot for explaining an exhibit to a visitor, and the computer is applied to an area where a highlight part of the exhibit is easy to see. A highlight area storage means for storing a highlight area set in advance, a visitor position acquisition means for acquiring the current position of the visitor, a position other than the highlight area set for the exhibit, and a visitor position acquisition means A robot position selecting means for selecting an explanation position for the explanation robot to explain the exhibit, on the condition that the visitor's path from the current position of the visitor to the highlight area is not blocked. Movement control means for moving the explanation robot to the explanation position selected by the robot position selection means, guidance for prompting the visitor to move to the highlight area Induced behavior control means for executing the dynamic in the description robot, and the functioning of the attention of visitors as the target behavior control means to be executed by the described robot attention behavior to direct the interest portion of the exhibit is a robot control program.

  According to the sixth invention, the same effect as the first invention can be achieved, and the visitor can be smoothly guided to a position where the highlight part of the exhibit is easy to see, and the explanation of the highlight part of the exhibit is smooth. Can start.

  The seventh invention is an explanation robot for explaining the exhibit to the visitor, the highlight area storage means for storing the highlight area set in advance for the area where the highlight portion of the exhibit is easy to see, the visitor Visitor position acquisition means for acquiring the current position of the visitor, and a path other than the highlight area set in the exhibit, and the way of the visitor from the current position of the visitor acquired by the visitor position acquisition means to the highlight area The robot position selection means for selecting the explanation position for explaining the exhibit, the movement execution means for moving to the explanation position selected by the robot position selection means, The explanation is provided with guidance behavior execution means for performing guidance behavior for urging the visitor to move, and attention behavior execution means for executing attention behavior that directs the attention of the visitor to the highlight part of the exhibit. Tsu is a door.

  According to the seventh invention, the same effects as in the first invention can be achieved, and the visitor can be smoothly guided to a position where the highlight part of the exhibit is easy to see, and the explanation of the highlight part of the exhibit is smooth. Can start.

  According to the present invention, the explanation robot is provided on the condition that it is a position other than the highlight area set in advance in the exhibit and does not block the visitor's path from the current position of the visitor to the highlight area. Since the explanation position is selected, the visitor can be guided smoothly to a position where the highlight part of the exhibit is easy to see. In addition, since the visitor is guided to a position where the highlight part of the exhibit is easy to see, it is easy to direct the attention of the visitor to the highlight part. Therefore, the explanation of the highlight part of the exhibit can be started smoothly.

  The above object, other objects, features, and advantages of the present invention will become more apparent from the following detailed description of embodiments with reference to the drawings.

It is an illustration figure which shows the mode of the exhibition hall where the robot control system which is one Example of this invention was applied. It is an illustration figure which shows the structure of the robot control system of FIG. FIG. 2 is a block diagram illustrating an example of an electrical configuration of a central control device provided in the robot control system of FIG. 1. FIG. 4 is an illustrative view showing one example of a memory map of the memory shown in FIG. 3. It is a front view which shows an example of the external appearance of the explanatory robot with which the robot control system of FIG. 1 is provided. FIG. 6 is a block diagram illustrating an example of an electrical configuration of the explanatory robot in FIG. 5. It is an illustration figure which shows the map of the exhibition hall of FIG. It is an illustration figure for demonstrating the highlight area | region, description area | region, and description candidate point set to each exhibit. It is an illustration figure which shows an example of the content of the exhibit DB shown in FIG. It is an illustration figure for demonstrating the variable of the numerical formula used when determining the description position of the description robot of FIG. It is an illustration figure for demonstrating the variable of the numerical formula used when determining the description position of the description robot of FIG. It is a flowchart which shows an example of the whole process of the robot control which the processor shown in FIG. 3 performs. It is a flowchart which shows an example of the selection process of the description position which the processor shown in FIG. 3 performs.

  Referring to FIGS. 1 and 2, a robot control system (hereinafter simply referred to as “system”) 100 according to an embodiment of the present invention includes an explanation robot 10, a central control device 12, and the like. Applicable to environments such as exhibition halls, science museums, museums and shopping malls located in various places. As will be described in detail later, in the robot control system 100, the explanation is given when there is a visitor who has not received explanation of a certain exhibit X or has not seen the highlight part (attention point) of the exhibit X. By acting on the visitor from the robot 10, the visitor is led to a position where the highlight part of the exhibit X is easy to see, and the visitor's attention is directed to the highlight part. Then, the explanation robot 10 explains the highlight part of the exhibit X to the visitor.

  In this embodiment, the following description will be made on the assumption that the robot control system 100 is applied to a motorcycle (motorcycle) exhibition hall. A plurality (35 in this embodiment) of distance image sensors 14 are installed on the ceiling of the exhibition hall, and each of these distance image sensors 14 is connected to the central controller 12. Each visitor is given a user ID.

  The central control device 12 detects the position and orientation of an arbitrarily moving visitor by a distance image sensor 14 at regular intervals (for example, 1 second), and continuously detects the position and orientation of the visitor. The movement history (movement information) is stored in association with the user ID. Further, the central control device 14 performs wireless communication with the explanation robot 10 via the network 102 and controls the action of the explanation robot 10 as necessary.

  The explanation robot 10 is an interaction-oriented robot having a function of executing a communication action including a body motion such as gesture gesture and a voice with a communication target such as a human being. The explanation robot 10 moves in the exhibition hall based on the action command given by the central control device 14, and explains the exhibit X to the visitor.

  For simplicity, only one visitor is shown in FIG. 1, but there may be more visitors in the exhibition hall. Similarly, FIG. 1 shows three exhibits X (X1, X2, X3), but the number of exhibits X arranged in the exhibition hall can be changed as appropriate.

  Hereinafter, the configuration of the system 100 will be specifically described. As described above, the system 100 includes the explanation robot 10 and the central controller 12 connected via the network 102. In this embodiment, one explanation robot 10 is controlled. However, the robot control system 100 can also control two or more explanation robots 10 at the same time.

  FIG. 3 is a block diagram showing an electrical configuration of the central controller 12. Referring to FIG. 3, the central controller 12 is a general-purpose computer such as a personal computer or a workstation, and includes a processor 16. The processor 16 is sometimes called a microcomputer or CPU. In addition to the distance image sensor 12 described above, the processor 16 is connected to the memory 18 and the communication LAN board 20, and is also connected to the user DB 24 and the exhibit DB 26.

  The distance image sensor 12 irradiates light such as infrared light or laser, and captures light reflected from the object (reflected light) by an optical sensor such as a CCD sensor. The distance image sensor 12 detects the actual distance to the object by measuring the time until the light returns for each pixel. The distance image sensor 12 of this embodiment employs a product called Xtion manufactured by ASUS. In another embodiment, the distance image sensor 12 may be a Microsoft Kinect (registered trademark) sensor, a Panasonic three-dimensional distance image sensor D-IMAGEr (registered trademark), or the like. . This type of sensor is sometimes called a three-dimensional distance measuring sensor, a 3D scanner, or the like.

  The processor 16 acquires the three-dimensional information of the target through such a distance image sensor 12. The three-dimensional information from the distance image sensor 12 includes the shape of the object and the distance to the object. For example, when a visitor is sensed by the distance image sensor 12 provided on the ceiling, the shape of the head and both shoulders when the visitor is viewed from above, and the distance to the head and both shoulders are three-dimensional information. As obtained. That is, the processor 16 obtains three-dimensional information from each of the plurality of distance image sensors 12 and obtains a position (for example, position coordinates (x, y, z) of a feature point such as the center of gravity in a three-dimensional space (world coordinate system). )) And the orientation of the person (eg, the orientation of features such as the head and shoulders).

  In another embodiment, the position and orientation of a person may be detected using a two-dimensional or three-dimensional LRF instead of the distance image sensor 12.

  The memory 18 includes ROM, HDD, and RAM. In the ROM and the HDD, a control program for controlling the operation of the central controller 14 is stored in advance. The RAM is used as a work memory or a buffer memory for the processor 16.

  FIG. 4 is an illustrative view showing one example of a memory map of the memory 18. As shown in FIG. 4, the memory 18 includes a program storage area 202 and a data storage area 204. In the program storage area 202, for example, as a program for causing the explanation robot 10 to execute explanation behavior, the explanation robot 10 determines an explanation position (standing position) where the exhibit X is explained to the visitor. Between the robot position calculation program 210, the action command selection program 212 for determining the action (moving action, speech action, and body movement such as pointing and swinging) to be executed by the explanation robot 10, and the explanation robot 10. A communication program 214 and the like for transmitting / receiving necessary data and commands (action commands) are stored. The program storage area 202 also stores a position detection program 216 for detecting the position and orientation of the visitor based on the detection data of the distance image sensor 12.

  In the data storage area 204, map data 220 of the environment (exhibition hall) including the position information of the exhibit X is stored in advance. Although not shown, the data storage area 204 is also provided with a buffer for temporarily storing the results of various calculations and other counters and flags necessary for the operation of the central controller 14.

  Returning to FIG. 3, the communication LAN board 20 is configured by a DSP, for example, and supplies the wireless communication device 22 with the transmission data given from the processor 16. The wireless communication device 22 transmits the transmission data to the explanation robot 10 via the network 102. For example, the transmission data includes data necessary for autonomous movement of the explanation robot 10, data necessary for performing service, and a signal (command) of an action command instructing the explanation robot 10. The communication LAN board 20 receives data via the wireless communication device 22 and gives the received data to the processor 16.

  The user DB 26 is a database in which information related to visitors existing in the exhibition hall is stored. Although illustration is omitted, in the user DB 26, for example, the movement history of visitors in the exhibition hall, information on whether or not each exhibit X has been explained from the explanation robot 10 is associated with the user ID. Is memorized. The user DB 26 appropriately stores information such as visitor names, ages, sexes, and interesting matters based on the results of previous questionnaires.

  The exhibit DB 26 is a database in which information related to the exhibit X is stored, and is used to determine the behavior of the mobile robot 10 when explaining the exhibit X to visitors. In the exhibit DB 26, for example, information such as the highlight area Rf, the explanation area Re, and the explanation candidate point C is stored in association with the exhibit ID (see FIG. 9). Since the details of the exhibit DB 26 will be described later, a detailed description thereof is omitted here.

  FIG. 5 is a front view showing the appearance of the explanation robot 10. With reference to FIG. 5, the explanation robot 10 includes a carriage 40, and two wheels 42 and one slave wheel 44 for autonomously moving the explanation robot 10 are provided on the lower surface of the carriage 40. The two wheels 42 are independently driven by a wheel motor 46 (see FIG. 6), and the carriage 40, that is, the explanation robot 10 can be moved in any direction, front, back, left, and right. The slave wheel 44 is an auxiliary wheel that assists the wheel 42. Therefore, the explanation robot 10 can move in the arranged space by autonomous control.

  A cylindrical sensor mounting panel 48 is provided on the carriage 40, and a large number of infrared distance sensors 50 are mounted on the sensor mounting panel 48. These infrared distance sensors 50 measure the distance from the sensor mounting panel 48, that is, the object (such as a person or an obstacle) around the explanation robot 10.

  In this embodiment, an infrared distance sensor is used as the distance sensor. However, a small distance image sensor, an ultrasonic distance sensor, a millimeter wave radar, or the like can be used instead of the infrared distance sensor. .

  On the sensor mounting panel 48, the body 52 is provided so as to stand upright. Further, the above-described infrared distance sensor 50 is further provided in the upper front upper part of the body 52 (a position corresponding to a person's chest), and measures the distance mainly from a visitor in front of the explanation robot 10. Further, the body 52 is provided with a support column 54 extending from substantially the center of the upper end of the side surface, and an omnidirectional camera 56 is provided on the support column 54. The omnidirectional camera 56 photographs the surroundings of the explanation robot 10 and is distinguished from an eye camera 80 described later. As the omnidirectional camera 56, for example, a camera using a solid-state imaging device such as a CCD or a CMOS can be employed. In addition, the installation positions of the infrared distance sensor 50 and the omnidirectional camera 56 are not limited to the portions, and can be changed as appropriate.

  An upper arm 60R and an upper arm 60L are provided at upper end portions on both sides of the body 52 (a position corresponding to a human shoulder) by a shoulder joint 58R and a shoulder joint 58L, respectively. Although illustration is omitted, each of the shoulder joint 58R and the shoulder joint 58L has three orthogonal degrees of freedom. That is, the shoulder joint 58R can control the angle of the upper arm 60R around each of three orthogonal axes. A certain axis (yaw axis) of the shoulder joint 58R is an axis parallel to the longitudinal direction (or axis) of the upper arm 60R, and the other two axes (pitch axis and roll axis) are orthogonal to the axes from different directions. It is an axis to do. Similarly, the shoulder joint 58L can control the angle of the upper arm 60L around each of the three orthogonal axes. A certain axis (yaw axis) of the shoulder joint 58L is an axis parallel to the longitudinal direction (or axis) of the upper arm 60L, and the other two axes (pitch axis and roll axis) are orthogonal to the axes from different directions. It is an axis to do.

  Further, an elbow joint 62R and an elbow joint 62L are provided at the tips of the upper arm 60R and the upper arm 60L, respectively. Although illustration is omitted, each of the elbow joint 62R and the elbow joint 62L has one degree of freedom, and the angles of the forearm 64R and the forearm 64L can be controlled around the axis (pitch axis).

  A hand 66R and a hand 66L are provided at the tips of the forearm 64R and the forearm 64L, respectively. Each hand 66 is provided with a thumb, an index finger, a middle finger, a ring finger, and a little finger. Finger joints (not shown) are provided at the base of the thumb and forefinger of the hand 66 and can be moved independently. Further, the middle finger, the ring finger, and the little finger are integrally molded, and a finger joint (not shown) is provided at the root, like the thumb and the index finger. The middle finger, ring finger, and little finger can be moved together.

  In addition, wrists are provided at the bases of the hands 66R and 66L. Although illustration is omitted, the left and right wrists each have one degree of freedom, and the angles of the hands 66R and 66L can be controlled around the axis (yaw axis). Although illustration is omitted, the thumb joints of the hand 66R and the hand 66L, the index finger, and the remaining three fingers (middle finger, ring finger, and little finger) each have one degree of freedom. You can control the angle of your finger.

  Therefore, the explanation robot 10 extends the index finger, and points (points) an arbitrary object with the hand 66 with the thumb, middle finger, ring finger, and little finger folded, and the upper arm 60 and the forearm 64 with the hand open. In addition, it is possible to point an arbitrary object using the entire hand 66.

  In another embodiment, a hand 66 in which each finger is independent and has the same knuckles as a human finger may be employed in the explanation robot 10 as in a human. In this case, the explanation robot 10 can perform not only pointing but also grasping an object with a finger or communicating by sign language.

  Although not shown, the front surface of the carriage 40, the portion corresponding to the shoulder including the shoulder joint 58R and the shoulder joint 58L, the upper arm 60R, the upper arm 60L, the forearm 64R, the forearm 64L, the hand 66R, and the hand 66L, A contact sensor 68 (shown generically in FIG. 6) is provided. A contact sensor 68 on the front surface of the carriage 40 detects contact of a person or other obstacles with the carriage 40. Therefore, the explanation robot 10 can detect that there is a contact with an obstacle during its movement and immediately stop driving the wheels 42 to suddenly stop the explanation robot 10 from moving. In addition, the other contact sensors 68 detect whether or not the respective parts are touched. In addition, the installation position of the contact sensor 68 is not limited to the said site | part, and may be provided in an appropriate position (position corresponding to a person's chest, abdomen, side, back, and waist).

  A neck joint 70 is provided at the upper center of the body 52 (a position corresponding to a person's neck), and a head 72 is further provided thereon. Although illustration is omitted, the neck joint 70 has a degree of freedom of three axes, and the angle can be controlled around each of the three axes. A certain axis (yaw axis) is an axis that goes right above the explanation robot 10 (vertically upward), and the other two axes (pitch axis and roll axis) are axes orthogonal to each other in different directions.

  The head 72 is provided with a speaker 74 at a position corresponding to a human mouth. The speaker 74 is used for the explanation robot 10 to communicate with people around it by voice or sound. A microphone 76R and a microphone 76L are provided at a position corresponding to a human ear. Hereinafter, the right microphone 76R and the left microphone 76L may be collectively referred to as a microphone 76. The microphone 76 captures ambient sounds, particularly the voice of a person who is to perform communication. Furthermore, an eyeball part 78R and an eyeball part 78L are provided at positions corresponding to human eyes. The eyeball part 78R and the eyeball part 78L include an eye camera 80R and an eye camera 80L, respectively. Hereinafter, the right eyeball part 78R and the left eyeball part 78L may be collectively referred to as the eyeball part 78. Further, the right eye camera 80R and the left eye camera 80L may be collectively referred to as an eye camera 80.

  The eye camera 80 captures a human face approaching the explanation robot 10, other parts or objects, and captures a corresponding video signal. The eye camera 80 can be the same camera as the omnidirectional camera 56 described above. For example, the eye camera 80 is fixed in the eyeball part 78, and the eyeball part 78 is attached to a predetermined position in the head 72 via an eyeball support part (not shown). Although illustration is omitted, the eyeball support portion has two degrees of freedom, and the angle can be controlled around each of these axes. For example, one of the two axes is an axis (yaw axis) in a direction toward the top of the head 72, and the other is orthogonal to the one axis and goes straight in a direction in which the front side (face) of the head 72 faces. It is an axis (pitch axis) in the direction to be performed. By rotating the eyeball support portion around each of these two axes, the tip (front) side of the eyeball portion 78 or the eye camera 80 is displaced, and the camera axis, that is, the line-of-sight direction is moved. In addition, the installation positions of the above-described speaker 74, microphone 76, and eye camera 80 are not limited to the portions, and may be provided at appropriate positions.

  As described above, the robot 10 according to the present embodiment has an independent two-axis drive of the wheel 42, three degrees of freedom of the shoulder joint 58 (6 degrees of freedom on the left and right), and one degree of freedom of the elbow joint 62 (2 degrees of freedom on the left and right). , 1 degree of freedom of the wrist (2 degrees of freedom on the left and right), 1 degree of freedom of the knuckles (6 degrees of freedom for the left and right fingers), 3 degrees of freedom of the neck joint 70 and 2 degrees of freedom of the eyeball support (4 on the left and right) A total of 25 degrees of freedom).

  FIG. 6 is a block diagram showing an electrical configuration of the explanation robot 10. With reference to FIG. 6, the explanation robot 10 includes a processor 90. The processor 90 is also called a microcomputer or a processor, and is connected to the memory 94, the motor control board 96, the sensor input / output board 98, the audio input / output board 110, and the communication LAN board 130 via the bus 92.

  The memory 94 includes a ROM and a RAM. In the ROM, a control program for controlling the operation of the explanation robot 10 is stored in advance. For example, a detection program for detecting the output (sensor information) of each sensor, a communication program for transmitting / receiving necessary data and commands (behavioral commands) to / from an external computer such as the central control device 14, and central control An operation program or the like for acting on the basis of a command from the device 14 is stored. The RAM is used as a work memory or a buffer memory for the processor 90.

  The motor control board 96 is composed of, for example, a DSP, and controls the driving of motors for axes such as arms, neck joints, and eyeballs. That is, the motor control board 96 receives the control data from the processor 90, and controls two motors for controlling the respective angles of the two axes of the right eyeball portion 78R (in FIG. 6, collectively indicated as “right eyeball motor 112”). Control the rotation angle. Similarly, the motor control board 96 receives the control data from the processor 90, and shows two motors for controlling the respective angles of the two axes of the left eyeball portion 78L (in FIG. 6, collectively referred to as “left eyeball motor 114”). ) To control the rotation angle.

  The motor control board 96 receives control data from the processor 90, and includes a total of three motors that control the angles of the three orthogonal axes of the shoulder joint 58R and one motor that controls the angle of the elbow joint 62R. The rotational angles of four motors (collectively indicated as “right arm motor 116” in FIG. 6) are controlled. Similarly, the motor control board 96 receives control data from the processor 90, and includes three motors for controlling the angles of the three orthogonal axes of the shoulder joint 58L and one motor for controlling the angle of the elbow joint 62L. The rotation angles of a total of four motors (collectively indicated as “left arm motor 118” in FIG. 6) are controlled.

  The motor control board 66 receives control data from the processor 90, two motors for controlling the angle of one axis of the right wrist, and three motors for controlling the angles of the three finger joints of the right hand 66R. The rotation angles of the four motors (collectively indicated as “right-handed motor 120” in FIG. 6) are controlled. Similarly, the motor control board 66 receives the control data from the processor 90, and controls the angles of the two motors that control the angle of one axis of the wrist of the left hand and the three finger joints of the left hand 66L. The rotation angles of the four motors (collectively indicated as “left-handed motor 122” in FIG. 6) are controlled.

  Here, the angle of the finger joint does not reflect the rotation of the motor as it is, but is controlled by a fluid pressure cylinder that operates by the rotation of the motor. Specifically, a piston for moving the working fluid is movably accommodated in the fluid pressure cylinder, and the position of this piston is controlled by a motor.

  Further, the motor control board 96 receives control data from the processor 90 and controls three motors that control the angles of the three orthogonal axes of the neck joint 70 (referred to collectively as “head motor 124” in FIG. 6). ) To control the rotation angle.

  The motor control board 96 receives the control data from the processor 90 and controls the rotation angles of the two motors that drive the wheels 42 (collectively indicated as “wheel motors 46” in FIG. 6). In this embodiment, a motor other than the wheel motor 46 uses a stepping motor (that is, a pulse motor) in order to simplify the control. However, a DC motor may be used similarly to the wheel motor 46. The actuator that drives the body part of the explanation robot 10 is not limited to a motor that uses a current as a power source, and may be changed as appropriate. For example, in another embodiment, an air actuator or the like may be applied.

  Similar to the motor control board 96, the sensor input / output board 98 is configured by a DSP, and takes in signals from each sensor and supplies them to the processor 90. That is, data relating to the reflection time from each of the infrared distance sensors 50 is input to the processor 90 through the sensor input / output board 98. The video signal from the omnidirectional camera 56 is input to the processor 90 after being subjected to predetermined processing by the sensor input / output board 98 as necessary. Similarly, a video signal from the eye camera 80 is also input to the processor 90. In addition, signals from the plurality of contact sensors 68 described above (collectively indicated as “contact sensors 68” in FIG. 6) are provided to the processor 90 via the sensor input / output board 98.

  Similarly, the voice input / output board 110 is also configured by a DSP, and voice or voice in accordance with voice synthesis data provided from the processor 90 is output from the speaker 74. Also, audio input from the microphone 76 is given to the processor 90 via the audio input / output board 110.

  The communication LAN board 130 is configured by a DSP, for example, and provides transmission data given from the processor 90 to the wireless communication device 132, and the wireless communication device 132 sends the transmission data to an external computer (the central control device 14 via the network 102. ). In addition, the communication LAN board 130 receives data via the wireless communication device 132 and gives the received data to the processor 90. For example, the transmission data includes surrounding video data captured by the omnidirectional camera 56 and the eye camera 80.

  FIG. 7 is a map of the exhibition hall. Referring to FIG. 7, the exhibition hall includes an entrance and three exhibits X (X1, X2, X3). An RFID tag reader is installed at the entrance. For example, a visitor can enter an exhibition hall by having a reader read an RFID tag that the visitor has. The RFID tag stores a user ID, and the reader reads the user ID from the RFID tag. A user ID read by the reader is transmitted to the central control device 14. Therefore, the central control device 14 can identify each of a plurality of visitors in the exhibition hall by associating the position of the visitor detected at the entrance with the received user ID. In addition, the visitor's movement history detected by the distance image sensor 14 after entering is stored in the user DB 24 in association with the user ID, and the visitor received an explanation of an exhibit X from the explanation robot 10. In that case, the information is also stored in the user DB 24 in association with the user ID.

  In the map shown in FIG. 7, for the sake of simplicity, each exhibit X (X1, X2, X3) is represented by a rectangle, but in actuality, each exhibit X is assumed to be a variety of motorcycles. In addition, the point shown on each exhibit X represents the position of the central portion of the highlight portion Y (Y1, Y2, Y3) of each exhibit X, that is, the central portion of the portion that visitors want to pay attention to. . As a specific example, the highlight portion Y is a tire, a battery, an engine, or the like. However, the highlight portion Y of the exhibit X may be the entire exhibit X.

  Further, as shown in FIG. 7, in this embodiment, each of the exhibits X (X1, X2, X3) includes a highlight area Rf (Rf1, Rf2, Rf3) and an explanation area Re (Re1, Re2, Re3). Is preset by a designer or the like.

  With reference to FIGS. 7 and 8, each of the highlight area Rf and the description area Re is an area defined in a fan shape with the central portion of the highlight portion Y of the exhibit X as a base point. The highlight area Rf is set to an area where the highlight area Y of the exhibit X is easy to see. That is, the highlight area Rf is set as an area that the visitor wants to stand when the explanation robot 10 explains the exhibit X. In addition, the explanation area Re is set to an area where the point of interest Y of the exhibit X can be pointed, that is, an area that is not unnatural even if explanation with pointing is performed. That is, the explanation area Re is set to an area where it is preferable to arrange the explanation robot 10 (the standing position of the explanation robot 10 (the explanation position Pe)) when explaining the exhibit X.

  Further, a plurality of explanation candidate points C are preset for each exhibit X by a designer or the like. Each of the explanation candidate points C is a candidate position for the explanation position Pe of the explanation robot 10 when explaining the exhibit X, and is in an area where the highlight portion Y of the exhibit X can be explained (that is, a highlight spot). The distance from the visitor in the region Rf is within a certain range, and is set in advance within a region that is not unnatural even when the highlight portion Y is described. In this embodiment, the explanation position Pe of the explanation robot 10 is selected from among the plurality of explanation candidate points C based on Expression 1-3 described later.

  Such information on the highlight area Rf, the explanation area Re, and the explanation candidate point C is stored in the exhibit DB 26 in association with the exhibit ID as described above. Hereinafter, the details of the exhibit DB 26 will be described with reference to FIG.

  As shown in FIG. 9, the exhibit DB 26 includes a table, and is associated with the exhibit ID, exhibit X, highlight area Rf, explanation area Re, explanation candidate point C, pointing coordinates, explanation ( Information such as pointing (with pointing) and explanation (without pointing) is stored. The exhibit ID is an identification number given to each exhibit, and the name of the exhibit is described in the column of the exhibit X. In addition, in the column of the highlight area Rf and the explanation area Re, coordinate information indicating the area (range) of the above-described highlight area Rf and the explanation area Re is described, and in the column of the explanation candidate point C, the above explanation candidate points Coordinate information indicating the position of C is described.

  In the pointing coordinate field, coordinate information indicating the position of the central portion of the highlight portion Y of the exhibit X, that is, coordinate information of a target point when the explanation robot 10 points and explains the highlight portion Y is explained. Is described. Further, in the explanation (with pointing) column, the utterance content when the explanation robot 10 explains the highlight portion Y of the exhibit X by utterance with pointing is described in a text format. In the explanation (no pointing) column, the content of the utterance when the explanation robot 10 explains the highlight portion Y of the exhibit X by the utterance without pointing is described in a text format. Note that the utterance content described in the explanation (with or without pointing) includes an utterance (attention behavior) performed to direct the attention of the visitor to the highlight portion Y of the exhibit X.

  For example, referring to the exhibit DB 26 shown in FIG. 9, the name of the exhibit X having the exhibit ID “1” is “X1”, and the highlight region Rf and the description region are in the range of “Rf1” and “Re1”. It can be seen that Re is set. Further, explanation candidate points C are set at a plurality of positions “C1a, C1b, C1c,...”, And when the highlight portion Y is explained using a pointing hand, “(100, 100, 1200) It can be seen that the coordinate position " Furthermore, when explaining the exhibit X1 by an utterance with pointing, the explanation starts with an utterance “Please look over there ...” and when explaining the exhibit X1 by an utterance without pointing Shows that the explanation starts with the utterance "Look at the tires ...". The same applies to the exhibit X2 whose exhibit ID is “2” and the exhibit X3 whose exhibit ID is “3”.

  In the system 100 having such a configuration, the explanation robot 10 is arranged at the exhibition hall as described above. For example, the explanation robot 10 stays at a home position provided in the exhibition hall or moves (circulates) freely within the exhibition hall. Then, when there is a visitor who has not received an explanation of a certain exhibit X or who has not seen the highlight portion Y of a certain exhibit X, the explanation robot 10 actively responds to the visitor. By working, the visitor is guided to a position where the highlight part Y of the exhibit X is easy to see, and the visitor's attention is directed to the highlight part Y, and then the specific description of the highlight part Y is given.

  Specifically, in the system 100, the detection information from the distance image sensor 14 and the user DB 24 are referred to as appropriate, and the explanation of a certain exhibit X is not received or the highlight portion Y of the certain exhibit X is viewed. When it is detected that a non-visited visitor is in the vicinity of the exhibit X or approaching the exhibit X, first, it is suitable for explaining the highlight portion Y of the exhibit X to the visitor. The explanation robot 10 moves to the explained position (standing position) Pe. When there are a plurality of visitors who can be the explanation partner, for example, considering the efficiency, the visitor closest to the current position of the explanation robot 10 may be selected as the explanation partner. For example, in consideration of safety, a visitor in the vicinity of the exhibit X that is not crowded (there are few other visitors) may be selected as an explanation partner. However, the method of selecting an explanation partner is arbitrary, and can be selected at random from visitors who can be explanation partners.

  Here, when the explanation position Pe of the explanation robot 10 is determined, it is a position other than the highlight area Rf set in the exhibit X so that the explanation of the exhibit X to the subsequent visitors can be started smoothly. The description position Pe is determined on the condition that the visitor's path from the current position of the visitor to the highlight area Rf is not blocked. Preferably, the explanation position Pe is determined at a position where explanation using a pointing can be performed. In addition, when determining the explanation position Pe and subsequent actions of the explanation robot 10 for the visitor, information stored in the exhibit DB 26 is appropriately read and used.

  Hereinafter, an example of a method for determining the explanation position Pe will be described in detail with reference to FIGS. 10 and 11. In this embodiment, the explanation position Pe is a distance d, a first angle θ, and a second angle θh from among a plurality of explanation candidate points Ci (see FIGS. 8 and 9) preset for each exhibit X. Based on the above, the most suitable one (highest usefulness) for the current situation is selected.

  Here, the distance d indicates the distance between the explanation candidate point Ci and the highlight portion Y of the exhibit X. Further, the first angle θ is an angle formed by the central part of the highlight area Rf and the explanation candidate point Ci from the highlight part Y of the exhibit X, that is, the central part of the highlight part Y of the exhibit X and the highlight area Rf. And an angle formed by a line segment connecting the highlight part Y of the exhibit X and the explanation candidate point Ci. Further, the second angle θh is an angle formed by the central portion of the highlight area Rf and the current position Ph of the visitor with respect to the highlight section Y of the exhibit X, that is, the highlight section Y of the exhibit X and the highlight area Rf. The angle formed by the line connecting the central part and the line connecting the highlight part Y of the exhibit X and the current position Ph of the visitor is shown.

  And the usefulness (Utility) of each explanation candidate point Ci is calculated based on the following formula 1.

  In Equation 1, Udistance (d) is a usefulness based on the distance d, and is calculated based on the following Equation 2. Uangle (θ, θh) is a usefulness based on the first angle θ and the second angle θh, and is calculated based on the following Equation 3.

  In Equation 2, Dpref is the distance from the highlight portion Y most suitable for the pointing action of the explanation robot 10, and is set to 1.5 to 2.5 m, for example. Dmax is the maximum allowable difference. That is, the explanation position Pe of the explanation robot 10 is made easier to select as the distance from the highlight portion Y approaches the optimum distance for the pointing action.

  In Equation 3, Ubase (θ) is a usefulness based on the first angle θ and is calculated as shown in FIG. That is, at the first angle θ that falls within the highlight area Rf, Ubase = 0 is set so that the explanation position Pe of the explanation robot 10 does not fall within the highlight area Rf. Further, at the first angle θ corresponding to the boundary portion of the highlight region Rf, Ubase = Uh, and at the first angle θ corresponding to the boundary portion of the explanation region Re, Ubase = Um. Here, Uh> Um, and during this time, the value of Ubase (θ) decreases linearly. Further, at a position where the first angle θ is 180 °, Ubase = Ul. Here, Um> Ul, and the value of Ubase (θ) decreases linearly during this time. The decrease rate of the value of Ubase (θ) at this time is the value of Ubase (θ) in the explanation area Re. It is set to be larger than the decrease rate. That is, the explanation position Pe of the explanation robot 10 is made easy to select a position near the highlight area Rf, that is, a position near the visitor, and in particular, a position in the explanation area Re is made easy to select.

  Penalty (θ, θh) is a usefulness based on the positional relationship between the explanation candidate point Ci and the current position Ph of the visitor. Penalty (θ, θh) is an explanation candidate point Ci located on the same side as the current position Ph of the visitor with a line segment connecting the highlight portion Y of the exhibit X and the central portion of the highlight region Rf as a boundary. Penalty (θ, θh) = − Upenalty, and Penalty (θ, θh) = 0 for the explanation candidate point Ci located on the opposite side of the current position Ph of the visitor. The magnitude of Upenalty is set to the same magnitude as the maximum value (Uh) of Ubase (θ), for example. As a result, the explanation position Pe of the explanation robot 10 is prevented from being a position that blocks the path of the visitor from the current position Ph to the highlight area Rf.

  Useful when calculation of utility (Utility) for each candidate explanation point Ci is completed based on Formula 1-3 using the distance d, the first angle θ, and the second angle θh as described above. The explanation candidate point Ci having the highest degree is determined as the explanation position Pe of the explanation robot 10. As a result, the explanation position Pe of the explanation robot 10 is appropriately determined, and thereafter, the explanation robot 10 moves to the decided explanation position Pe.

  When the movement of the explanation robot 10 to the explanation position Pe is completed, the guidance robot 10 then calls the visitor serving as the explanation partner from the explanation robot 10, thereby performing a guiding action that prompts the visitor to move to the highlight area Rf. Execute and guide visitors to the highlight area Rf. For example, the explanation robot 10 turns its face or line of sight toward the visitor, calls "Please come over", and waits for the visitor to come within the highlight area Rf. If there are no other visitors around the explanation robot 10 and the explanation robot 10 can move the arm safely, in addition to the utterance “Please come over”, the highlight area Rf If a pointing action or pointing gesture or a gesture such as waving a hand is performed, the visitor can be more reliably guided into the highlight area Rf. Here, when prompting the visitor to move to the highlight area Rf, the explanation robot 10 is located at a position other than the highlight area Rf set in the exhibit X, and from the visitor's current position Ph to the highlight area. Since the path to the visitor up to Rf is not blocked, the explanation robot 10 does not obstruct the visitor's movement, and the visitor can easily see the highlight portion Y of the exhibit X ( It is possible to guide smoothly to the highlight area Rf).

  When it is detected that the visitor has come within the highlight area Rf, the explanation robot 10 performs an attention action for directing the visitor's attention to the highlight part Y of the exhibit X, and then the highlight part Y A specific explanation will be given. Specifically, first, whether or not the explanation position Pe that is the current position of the explanation robot 10 is within the explanation area Re, and whether or not the arm can be safely moved according to the situation around the explanation robot 10. Is determined to determine whether or not the explanation robot 10 can perform pointing. When the explanation robot 10 is in a state where the pointing can be performed, the explanation robot 10 utters “Look over there” while pointing at the highlight portion Y of the exhibit X. Attention behavior for directing the attention of the visitor to the highlight portion Y of the exhibit X is executed. On the other hand, when the explanation robot 10 is not in a situation where it can perform pointing, the explanation robot 10 does not perform pointing and only utters including a specific name such as “Look at the tire”. The attention action for directing the attention of the visitor to the highlight portion Y of the exhibit X is executed. However, even when the pointing cannot be performed, the attention or attention of the visitor robot 10 is directed to the highlight portion Y during the utterance, so that the visitor's attention can be easily directed to the highlight portion Y of the exhibit X. .

  After executing the attention behavior as described above, the explanation robot 10 gives a specific explanation about the highlight portion Y such as “the shape of the groove of the tire is ...”. Here, when the explanation of the highlight portion Y of the exhibit X is started for the visitor, the visitor is guided to a position (the highlight region Rf) where the highlight portion Y of the exhibit X is easy to see. Can be easily directed to the highlight portion Y of the exhibit X, and the explanation of the highlight portion Y of the exhibit X can be started smoothly.

  Next, the operation of the system 10 will be described using a flowchart. Specifically, the processor 16 of the central control device 12 shown in FIG. 3 executes the entire process of the explanation service for the exhibit X by the explanation robot 10 according to the flowchart shown in FIG. Referring to FIG. 12, when the entire process is started, processor 16 determines whether or not to end the entire process in step S1. For example, it is determined whether an operation for terminating the system 10 has been performed by an administrator or the like. If “YES” in the step S1, that is, if an operation for terminating the system 10 is performed by an administrator or the like due to the termination of a series of explanation services, the entire processing is terminated. On the other hand, if “NO” in the step S1, the process proceeds to a step S3.

  In step S3, it is determined whether or not there is a visitor as an explanation partner. For example, with reference to the detection information from the distance image sensor 14 or the user DB 24, it is determined whether or not a visitor who has not received an explanation of an exhibit X is in the vicinity of the exhibit X. If “NO” in the step S3, that is, if there is no visitor as an explanation partner, the process returns to the step S1. On the other hand, if “YES” in the step S3, that is, if there is a visitor serving as an explanation partner, the visitor serving as the explanation partner and the exhibit X to be explained are determined, and the process proceeds to a step S5.

  In step S5, information regarding the exhibit X to be explained is acquired. That is, referring to the exhibit DB 26, the area information or position information of the highlight area Rf, the explanation area Re, and the explanation candidate point C set for the exhibit X is acquired. In the next step S7, the current position Ph of the visitor serving as the explanation partner is acquired. That is, with reference to the detection information from the distance image sensor 14 or the user DB 24, the coordinate information of the current position Ph of the visitor serving as the explanation partner is acquired.

  In the subsequent step S9, a standing position (explanation position Pe) of the explanation robot 10 when explaining the highlight portion Y of the exhibit X is determined by executing a selection process (see FIG. 13) of the explanation position Pe described later. The process proceeds to step S11. In step S11, the explanation robot 10 is moved toward the explanation position Pe. That is, a movement command including coordinate information of the explanation position Pe is transmitted to the explanation robot 10. The explanation robot 10 that has received the movement command starts moving to the explanation position Pe based on the movement command.

  In a succeeding step S13, it is determined whether or not the explanation robot 10 has arrived at the explanation position Pe. If “NO” in the step S13, that is, if the explanation robot 10 has not arrived to the coordinate position of the explanation position Pe, the process returns to the step S7, and the explanation is made while reconfirming the current situation such as the current position Ph of the visitor. The movement of the robot 10 to the explanation position Pe is continued. On the other hand, if “YES” in the step S13, that is, if the explanation robot 10 arrives at the coordinate position of the explanation position Pe, the process proceeds to a step S15.

  In step S15, the explanation robot 10 is caused to perform a guiding action that prompts the visitor to move to the highlight area Rf. That is, an action command including utterance information and body motion information for executing the guidance action is transmitted to the explanation robot 10. For example, the explanation robot 10 that has received the action command turns its face or line of sight toward the visitor based on the action command and calls “Please come over here” or the like. At this time, if it is a situation where pointing is possible, a pointing action is performed by pointing to the highlight area Rf. Then, after waiting for about several seconds in consideration of the travel time of the visitor to the highlight area Rf.

  In the subsequent step S17, it is determined whether or not the current position Ph of the visitor is within the highlight area Rf. If “NO” in the step S17, that is, if the visitor is not in the highlight area Rf, it is determined that the visitor does not require guidance by the explanation robot 10, and the process returns to the step S1. However, the processing may be returned to step S15 once again, and even if the guidance robot that causes the visitor to move to the highlight region Rf is executed again, the visitor does not come into the highlight region Rf. In such a case, the process may be returned to step S1. On the other hand, if “YES” in the step S17, that is, if the visitor is in the highlight area Rf, the process proceeds to a step S19.

  In step S19, it is determined whether or not the explanation robot 10 can be pointed. For example, if the explanation position Pe of the explanation robot 10 is not in the explanation area Re, or if there is a safety problem due to other visitors around the explanation robot 10, it is determined that pointing is impossible. The On the other hand, when the explanation position Pe of the explanation robot 10 is within the explanation area Re and there is no safety problem, it is determined that the pointing can be performed.

  If “YES” in the step S19, that is, if the explanation robot 10 can point, the process proceeds to a step S21. In step S21, the explanation robot 10 is caused to execute explanation by utterance with pointing. That is, information such as pointing coordinates and explanation (with pointing) is read from the exhibit DB 26, and utterance information and body movement information for executing attention behavior that directs the attention of the visitor to the highlight portion Y of the exhibit X. Is sent to the explanation robot 10. The explanation robot 10 that has received the action command performs a noticeable action such as “Look over there” while pointing at the highlight portion Y of the exhibit X based on the action command. After that, a specific description of the highlight portion Y will be given, such as “The shape of the groove of the tire is ...”. When step S21 ends, the process returns to step S1.

  On the other hand, if “NO” in the step S19, that is, if it is not a situation where the explanation robot 10 can point, the process proceeds to a step S23. In step S <b> 23, the explanation robot 10 is made to explain by utterance without pointing. That is, an action command including utterance information and body motion information for reading attention information from the exhibit DB 26 and performing attention behavior that directs the attention of the visitor to the highlight portion Y of the exhibit X is read. Is transmitted to the robot 10. The explanation robot 10 that has received the action command executes the attention action based on the utterance such as “Look at the tire” based on the action command. In this utterance, the face or line of sight may be directed to the highlight portion Y. After that, the explanation robot 10 gives a specific explanation about the highlight portion Y such as “the shape of the groove of the tire is ...”. When step S23 ends, the process returns to step S1.

  FIG. 13 is a flowchart showing the selection process of the explanatory position Pe in step S9 shown in FIG. As illustrated in FIG. 13, when the processor 16 of the central control device 12 starts the selection process of the explanation position Pe, in step S31, the movable point among the explanation candidate points C of the exhibit X to be explained is displayed. Select to get. For example, with reference to the detection information from the distance image sensor 14 and the user DB 24 as appropriate, the points that are blocked by other visitors among the plurality of explanation candidate points C stored in the exhibit DB 26 are excluded, Select and acquire only vacant points.

  In the subsequent step S33, the usefulness is calculated for each explanation candidate point C acquired in step S31. That is, the usefulness is calculated for each candidate explanation point C based on Formula 1-3 using the distance d, the first angle θ, and the second angle θh. In the subsequent step S35, the explanation candidate point C having the highest usefulness is selected as the explanation position Pe, and the process returns to the entire process.

  According to this embodiment, it is a position other than the highlight area Rf set in the exhibition X in advance and is a position that does not block the path of the visitor from the current position Ph of the visitor to the highlight area Rf. Since the explanation position Pe of the explanation robot 10 is selected as a condition, the visitor can be smoothly guided to a position where the highlight part Y of the exhibit X is easy to see. In addition, since the visitor is guided to a position where the highlight part Y of the exhibit X is easy to see, the visitor's attention can be easily directed to the highlight part Y. Therefore, explanation of the highlight part Y of the exhibit X can be started smoothly.

  In the above-described embodiment, the usefulness of each explanation candidate point C is calculated based on Formula 1-3 using the distance d, the first angle θ, and the second angle θh, and the explanation candidate point having the highest usefulness is calculated. C is selected as the explanation position Pe. However, the method for determining the explanation position Pe that is a position other than the highlight area Rf and that does not block the path of the visitor from the current position Ph of the visitor to the highlight area Rf is as follows. It is not limited to. For example, the usefulness of each explanation candidate point C may be calculated using one or two of the distance d, the first angle θ, and the second angle θh. Further, it is possible to freely set which value of the distance d, the first angle θ, and the second angle θh is increased. For example, when the highlight portion Y can be seen from any surrounding angle, it is possible to make it difficult to select the position facing the visitor with the exhibit X in between and the position facing directly. Of course, the usefulness of each explanation candidate point C can also be calculated using a variable other than the distance d, the first angle θ and the second angle θh, and a numerical expression other than Expression 1-3.

  Further, for example, based on the situation around the visitor, a route for moving from the visitor's current position Ph to the highlight area Rf (one shortest route or several routes that are likely to pass) may be used. ) And the explanation position Pe may be selected from the explanation candidate points C excluding those on the route.

  In the above-described embodiment, the explanation candidate point C is set at a position other than the explanation area Re. However, the explanation candidate point C can be pointed by the explanation robot 10 only in the explanation area Re. You may make it set only to an area | region. As a result, the explanation position Pe of the explanation robot 10 is always a position where it can be pointed, and if there is no other safety problem, the explanation robot 10 can surely execute the explanation with pointing. Become.

  Further, the explanation candidate point C is not necessarily set in advance for each exhibit X. For example, when the explanation position Pe is determined, it is a precondition that the position is a position other than the highlight area Rf and does not block the passage of the visitor from the current position Ph to the highlight area Rf. As an alternative, the peripheral position of the highlight area Rf closest to the current position of the explanation robot 10 may be arbitrarily selected.

  Further, in the above-described embodiment, the highlight area Rf and the explanation area Re are defined in a fan shape with the central portion of the highlight portion Y of the exhibit X as a starting point, but the shape of the highlight area Rf and the explanation area Re is There is no particular limitation. For example, the highlight area Rf and the explanation area Re may be areas having an appropriate shape such as a circular shape or a quadrangular shape, which are arranged at positions slightly away from the exhibit X.

  Furthermore, in the above-described embodiment, one highlight portion Y is provided for one exhibit X. However, one exhibit X may include a plurality of highlight portions Y. In this case, a highlight area Rf, an explanation area Re, an explanation candidate point C, and the like are set for each highlight portion Y.

  A plurality of highlight areas Rf may be set for one highlight portion Y. In this case, the explanation area Re and the explanation candidate point C are set for each highlight area Rf. In this case, for example, a visitor serving as an explanation partner may be guided to the vacant highlight area Rf according to the degree of congestion by other visitors.

  Further, when a plurality of highlight areas Rf are set for one highlight portion Y, a plurality of highlight areas Rf can be set in the same direction. For example, the highlight area Rf may be set in a plurality of stages, such as a narrow first highlight area in which the highlight portion Y is narrowed down to the most easily viewable area and a second highlight area wider than the first highlight area. . In this case, first, it is determined whether or not guidance to the first highlight area is possible, and if it is determined that guidance to the first highlight area is impossible due to congestion or safety reasons. It may be determined whether or not guidance to the second highlight area is possible.

  In addition, when the highlight portion Y can be seen from any angle around, such as when the entire exhibit X becomes the highlight portion Y, for example, the distance from the visitor is not too close to the visitor. A position within the distance and close to the current position of the explanation robot 10 can also be selected as the explanation position Pe of the explanation robot 10. In this case, the distance between the visitor's current position Ph and the explanation candidate point C and the angle formed by the visitor's current position Ph and the explanation candidate point C with respect to the highlight portion Y of the exhibit X are added to the usefulness calculation. Good.

  Further, in the above-described embodiment, the central control device 12 is provided separately from the explanation robot 10, and the explanation robot 10 operates based on an instruction from the processor 16 of the central control device 12. However, the present invention is not limited to this. For example, the distance image sensor 14, the user DB 24, the exhibit DB 26, and the like are connected to the processor 90 of the explanation robot 10, and the processor 90 of the explanation robot 10 executes the processes shown in FIGS. You can also. That is, the explanation robot 10 may execute the explanation service for the exhibit X for visitors in a stand-alone manner.

  Further, the specific configuration such as the external appearance and electrical configuration of the explanation robot 10 is not limited to that shown in FIGS. 5 and 6, and a known robot can be used as the explanation robot 10. For example, a robot having a biped walking type moving mechanism can be adopted as the explanation robot 10 instead of a robot having a wheel type moving mechanism.

  Furthermore, the plurality of programs described in the above embodiments may be stored in the HDD of the data distribution server and distributed to a system having the same configuration as that of the present embodiment via a network. In addition, the storage medium is sold or distributed in a state where these programs are stored in a storage medium such as an optical disk such as a CD, DVD, or BD (Blu-ray (registered trademark) Disc), a USB memory, or a memory card. May be. When the plurality of programs downloaded through the server and storage medium described above are applied to a system having the same configuration as that of this embodiment, the same effect as that of this embodiment can be obtained.

  It should be noted that the specific numerical values such as the dimensions mentioned above are merely examples, and can be appropriately changed according to the needs of product specifications and the like.

DESCRIPTION OF SYMBOLS 10 ... Explanation robot 12 ... Central control unit 14 ... Distance image sensor 16 ... Central control unit processor 18 ... Central control unit memory 24 ... User DB
26… Exhibition DB
100 ... Robot control system X ... Exhibit Y ... Highlight part Rf ... Highlight area Re ... Explanation area C ... Explanation candidate point

Claims (7)

A robot control system including an explanation robot for explaining exhibits to visitors,
A highlight area storage means for storing a highlight area set in advance for an area where the highlight portion of the exhibit is easy to see;
Visitor position acquisition means for acquiring the current position of the visitor;
At a position other than the highlight area set in the exhibit and at a position that does not block the path of the visitor from the current position of the visitor acquired by the visitor position acquisition means to the highlight area. Robot position selection means for selecting an explanation position when the explanation robot explains the exhibit on the condition that there is
Movement control means for moving the explanation robot to the explanation position selected by the robot position selection means;
Guiding behavior control means for causing the explanation robot to perform a guidance behavior for urging the visitor to move to the highlight area, and execution of attention behavior for causing the visitor's attention to be directed to the highlight portion of the exhibit. A robot control system comprising attention behavior control means. It further includes explanation candidate point storage means for storing a plurality of explanation candidate points set in advance in a region where the highlight part of the exhibit can be explained.
The robot control system according to claim 1, wherein the robot position selection unit selects the explanation position from explanation candidate points stored in the explanation candidate point storage unit. The distance between the explanation candidate point and the highlight portion of the exhibit, the first angle formed by the center portion of the highlight area and the explanation candidate point starting from the highlight portion of the exhibit, and the highlight portion of the exhibit Based on at least one of the second angles formed by the central part of the highlight area and the current position of the visitor as a starting point, it comprises a usefulness calculating means for calculating the usefulness of the explanation candidate points,
The robot control system according to claim 2, wherein the robot position selection unit selects an explanation candidate point having the highest usefulness calculated by the usefulness calculation unit as the explanation position.   4. The robot control system according to claim 2 or 3, wherein the explanation candidate points stored in the explanation candidate point storage means are set for an area that can be explained using pointing. After the explanation robot has moved to the explanation position by the movement control means, it comprises a situation judgment means for judging whether or not the explanation robot is capable of pointing.
The attention behavior control means causes the explanation robot to perform attention behavior by an utterance accompanied by pointing when the situation determination means determines that the pointing is possible, and the situation determination means 5. The robot control system according to claim 1, wherein when it is determined that the situation is not possible, the explanation robot causes the attention robot to perform the attention action by the utterance without pointing. A robot control program executed on a computer of a robot control system including an explanation robot for explaining exhibits to visitors,
The computer,
A highlight area storage means for storing a highlight area set in advance for an area where the highlight portion of the exhibit is easy to see;
Visitor position acquisition means for acquiring the current position of the visitor;
At a position other than the highlight area set in the exhibit and not blocking the path of the visitor from the current position of the visitor acquired by the visitor position acquisition means to the highlight area. Robot position selection means for selecting an explanation position where the explanation robot explains the exhibit on the condition that
Movement control means for moving the explanation robot to the explanation position selected by the robot position selection means;
Guiding behavior control means for causing the explanation robot to perform a guidance behavior for urging the visitor to move to the highlight area, and execution of attention behavior for causing the visitor's attention to be directed to the highlight portion of the exhibit. A robot control program that functions as an attention behavior control means. An explanation robot that explains the exhibits to visitors,
A highlight area storage means for storing a highlight area set in advance for an area where the highlight portion of the exhibit is easy to see;
Visitor position acquisition means for acquiring the current position of the visitor;
At a position other than the highlight area set in the exhibit and not blocking the path of the visitor from the current position of the visitor acquired by the visitor position acquisition means to the highlight area. Robot position selection means for selecting an explanation position for explaining the exhibit on the condition that there is
Moving means for moving to an explanatory position selected by the robot position selecting means;
A guidance behavior executing means for performing a guidance behavior for urging the visitor to move to the highlight area; and a attention behavior executing means for executing a attention behavior for directing the visitor's attention to a highlight portion of the exhibit. Explanation robot.

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