JP2009053171A - Display system, display method, and program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a display system capable of reporting the position of a person to be watched at moderate accuracy, displaying the tendency of the behavior of the person to be watched in a way easy to understand, and protecting privacy of the person to be watched. <P>SOLUTION: The display system 1 includes a tag device 2 carried by the person to be watched, a tag detection device 3 installed in a watching area, and a custodian terminal 4 used by a watching custodian, and is used in a watching system or the like. In the display system 1, the position of the person to be watched is displayed on the custodian terminal 4 on the basis of a detection result of the tag device 2 by the tag detection device 3, wherein as an image for displaying the position of the person to be watched, a detection area having a prescribed size including the position of the tag detection device 3 that has detected the tag device 2 is discriminatingly displayed on a map. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a display system that improves the visibility of a position display image of a person being watched over, and also relates to a display system having a function for protecting the privacy of a person being watched over.

In recent years, a system has been proposed in which parents in their homes or workplaces can watch the state of children and students (also called schoolchildren) attending schools and cram schools (see, for example, Patent Document 1). In such a system, a device with a monitoring camera is installed on a schoolchildren's school road, and the schoolchildren are provided with electronic tags that can wirelessly communicate with the device. When the schoolchild passes the vicinity of the device when going to and from school, the tag ID is received from the electronic tag possessed by the schoolchild, and the position information and video information of the schoolchild are provided to the guardian.
Japanese Unexamined Patent Publication No. 2007-42009 (page 5-13, FIG. 1)

  In such a conventional system, when the position of the schoolchild is displayed on the guardian's terminal, for example, the position of the device that detected the electronic tag of the schoolchild is represented by a point on the map.

  However, in the conventional system, the point on the map displayed on the terminal for the guardian is accurate as the position display of the device detecting the electronic tag of the schoolchild, but is accurate as the position display of the schoolchild. I can't say that. For example, when the electronic tag is an active tag, the detectable range of the electronic tag is about several tens to 100 m. If a school child passes somewhere in this wide range, the electronic tag of the school child is detected by the device. Will be. In such a case, if the position of the device that detected the electronic tag of the schoolchild is simply displayed as a point on the map, the guardian may misunderstand the position of the device as the position of the schoolchild. There was a problem that it was difficult to tell accurately.

  When a schoolchild moves to various places through various routes, the electronic tag of the schoolchild is detected by a large number of devices. However, in the conventional system, since the position of the device that detected the electronic tag of the schoolchild is only displayed as a large number of scattered points on the map, there is a problem that the behavior tendency of the schoolchild is difficult to understand.

  On the other hand, if the current position or passage history of school children is displayed too accurately, there is a risk that such information may be illegally obtained and used by a third party, which is problematic from the viewpoint of protecting the school children's privacy.

  The present invention was made in order to solve the above-described conventional problems, can appropriately notify the position of the person being watched over, can display the behavior tendency of the person being watched in an easy-to-understand manner, and An object is to provide a display system capable of protecting the privacy of a person being watched over.

  The display system of the present invention includes a tag device held by a person being watched over, a tag detection device that is installed at a plurality of locations in the watch area and capable of detecting the tag device, and a watch guardian who watches the person being watched over. A display device for displaying a position of the person to be watched on the guardian terminal based on a detection result of detecting the tag device by the tag detection device. Display image generation means for generating a position display image in which a detection area having a predetermined size including the detected position of the tag detection device is displayed on the map as an image for displaying the position of the person being watched over It has the composition provided.

  With this configuration, when the tag detection device detects a tag device held by the person being watched over, a detection area indicating the position of the tag detection device is displayed separately on the map. The detection area has a predetermined size including the position of the tag detection device, and it is highly likely that the person to be watched has passed somewhere in the detection area. Thereby, it is possible to inform the position of the person being watched over reasonably accurately. In addition, since this detection area has a predetermined size, when a large number of detection areas are displayed, the detection areas are overlapped. The place displayed as an overlap of the detection areas is highly likely to be a place where the person being watched over frequently visits. Thereby, the tendency of the behavior of the person being watched over can be displayed in an easily understandable manner. In addition, since this detection area has a predetermined size, it is possible to prevent an overly accurate position of the person being watched over from being displayed. Thereby, the privacy of the person being watched over can be protected.

  In the display system of the present invention, the display image generation means includes a highlight display means for highlighting the detection area on a map.

  With this configuration, the detection area is highlighted on the map, and the behavior tendency of the person being watched over becomes easy to understand.

  In the display system of the present invention, the size of the detection area is set based on the received radio wave intensity when the tag detection device detects the tag device.

  With this configuration, the detection area can be set to an appropriate size based on the received radio wave intensity. For example, when the received radio wave intensity is high, the detection area is set large, and when the received radio wave intensity is low, the detection area is set small. Thus, the detection area can be set to an appropriate size according to the behavior tendency of the person being watched over.

  In the display system of the present invention, the size of the detection area is set based on a detection history when the tag detection device detects the tag device.

  With this configuration, the detection area can be set to an appropriate size based on the detection history. For example, when the detection frequency is high, the detection area is set large, and when the detection frequency is low, the detection area is set small. Thus, the detection area can be set to an appropriate size according to the behavior tendency of the person being watched over.

  In the display system of the present invention, the detection area is a line-shaped trajectory area connecting the positions of the tag detection devices that detected the tag device on a map, and the line width of the trajectory area is the tag The detection device has a configuration that is set according to the received radio wave intensity when the tag device is detected.

  With this configuration, the trajectory area is displayed on the map, and the behavior tendency of the person being watched over becomes easy to understand. The line width of this locus area is set to an appropriate thickness according to the received radio wave intensity. For example, when the received radio wave intensity is high, the line width is set large, and when the received radio wave intensity is low, the line width is set small. Thus, the line width can be set to an appropriate thickness according to the behavior tendency of the person being watched over.

  In the display system of the present invention, the detection area is a block-shaped block area in which a map including a position of the tag detection device that detected the tag device is divided in advance, and the size of the block area is The tag detection device has a configuration that is set according to the received radio wave intensity when the tag device is detected.

  With this configuration, the block area is displayed on the map, and the behavior tendency of the person being watched over becomes easy to understand. The size of this block area is set to an appropriate size according to the received radio wave intensity. For example, when the received radio wave intensity is high, the block area is set large, and when the received radio wave intensity is low, the block area is set small. Thus, the block area can be set to an appropriate size according to the behavior tendency of the person being watched over.

  In the display system of the present invention, the detection area is a circular area centered on the position of the tag detection device that has detected the tag device, and the size of the circular area is determined by the tag detection device. It has the structure set according to the received radio wave intensity when the tag device is detected.

  With this configuration, a circular area is displayed on the map, and the behavior tendency of the person being watched over becomes easy to understand. The diameter of this circular area is set to an appropriate length according to the received radio wave intensity. For example, when the received radio wave intensity is high, the diameter of the circular area is set long, and when the received radio wave intensity is low, the diameter of the circular area is set short. Thus, the diameter of the circular area can be set to an appropriate length according to the behavior tendency of the person being watched over.

  In the display system of the present invention, the detection area is a pattern area of an antenna sensitivity pattern shape of the tag detection device that detects the tag device, and the size of the pattern area is determined by the tag detection device. It has a configuration that is set according to the received radio wave intensity when the device is detected.

  With this configuration, the pattern area is displayed on the map, and the behavior tendency of the person being watched over becomes easy to understand. The size of this pattern area is set to an appropriate size according to the received radio wave intensity. For example, when the received radio wave intensity is high, the pattern area is set large, and when the received radio wave intensity is low, the pattern area is set small. Thus, the pattern area can be set to an appropriate size according to the behavior tendency of the person being watched over.

  In the display system of the present invention, the highlighting means changes the highlighting of the detection area according to the time when the tag device is detected.

  With this configuration, it is possible to display information on the position of the person being watched over and information on the flow of time. Thereby, it is possible to display the behavior of the person being watched over in an easy-to-understand manner.

  In the display system of the present invention, the display image generation means includes a non-highlighting display means for non-highlighting display of a map image other than the detection area compared to the map image of the detection area. .

  With this configuration, the map image other than the detection area is not highlighted. Thereby, the visibility of the position display image of the watching target person can be improved, and the privacy of the watching target person can also be protected.

  In the display system of the present invention, the non-highlight display means has a configuration in which a map image other than the detection area is displayed in a blurred manner as compared with the map image of the detection area.

  With this configuration, the map image other than the detection area is displayed in a blurred manner. Thereby, the privacy of the person being watched over can be protected.

  In the display system of the present invention, the non-emphasized display means has a configuration in which the saturation of the map image other than the detection area is displayed lower than the map image of the detection area.

  With this configuration, the map image outside the detection area is displayed with low saturation. Thereby, the visibility of the position display image of the watching target person can be improved, and the privacy of the watching target person can also be protected.

  In the display system of the present invention, the non-emphasized display means displays a contrast of a map image other than the detection area lower than that of the map image of the detection area.

  With this configuration, the map image other than the detection area is displayed with low contrast. Thereby, the visibility of the position display image of the watching target person can be improved, and the privacy of the watching target person can also be protected.

  In the display system of the present invention, the non-emphasized display means has a configuration in which the brightness of the map image other than the detection area is displayed lower than the map image of the detection area.

  With this configuration, the map image other than the detection area is displayed with low luminance. Thereby, the visibility of the position display image of the watching target person can be improved, and the privacy of the watching target person can also be protected.

  The display method of the present invention is a display method used in the above display system, detects a tag device held by a person being watched over, identifies the position of the tag detection device that detected the tag device, and detects the tag A guardian who identifies a detection area including a position, generates position display image data in which the identified detection area is distinguished and displayed on a map, and watches the person being watched over the position display image data. Display on the parent terminal to be used.

  Also by this method, the position of the person being watched over can be notified reasonably accurately as in the above system. In addition, the behavior tendency of the person being watched over can be displayed in an easy-to-understand manner. Thereby, the visibility of the position display image of the watching target person can be improved, and the privacy of the watching target person can also be protected.

  The program of the present invention is a program for the display system described above, in which a computer receives information that detects a tag device held by a person to be watched, and a tag is detected from the position of the tag detection device that detects the tag device. A process for specifying a detection position, a process for specifying a detection area including the tag detection position, a process for generating position display image data in which the specified detection area is displayed separately on a map, and the position display image A process of displaying data on a guardian's terminal used by a guardian who watches the person being watched over.

  Also with this program, the position of the person being watched over can be notified reasonably accurately as in the above system. In addition, the behavior tendency of the person being watched over can be displayed in an easy-to-understand manner. Thereby, the visibility of the position display image of the watching target person can be improved, and the privacy of the watching target person can also be protected.

  In the present invention, by providing a display image generating means for changing the position display according to the purpose of the user, the position of the person being watched over can be notified reasonably accurately, and the behavior tendency of the person being watched over can be indicated. Therefore, it is possible to provide a display system that has an effect of being easy to see because it can be displayed in an easy-to-understand manner and protecting the privacy of the person being watched over.

  Hereinafter, a display system according to an embodiment of the present invention will be described with reference to the drawings. In this embodiment, a display system used in a schoolchild watching system or the like that allows a guardian (watching guardian) at home or work to watch the state of schoolchildren (watching person) who attend school or cram school. The case of is illustrated.

  The display system of this embodiment will be described with reference to FIGS. Here, first, the overall configuration of the display system will be described. FIG. 1 is a block diagram showing the configuration of the display system of the present embodiment. As shown in FIG. 1, the display system 1 includes a tag device 2, a tag detection device 3, a guardian's terminal 4, and a center device 5. In the example of FIG. 1, only one tag device 2, tag detection device 3, and guardian's terminal 4 are shown for convenience of explanation, but the tag device 2, tag detection device 3, and guardian are shown. The number of service terminals 4 is not limited to this.

  Next, each configuration of the display system 1 will be described. The tag device 2 is a device such as an IC card such as a student ID card or a cram school card with an electronic C tag, or a mobile terminal such as a mobile phone or a PDA, and is owned by a schoolchild who is a person to be watched over.

  As shown in FIG. 1, the tag device 2 includes an antenna 6 for performing wireless communication and a wireless transmission / reception unit 7 for performing wireless transmission / reception with the tag detection device 3. The tag device 2 includes a microcomputer 8 for operation control and a memory 9 in which information such as a tag ID is recorded. In the example shown in FIG. 1, the tag device 2 is an active tag, but may be a passive tag that does not require a power source.

  The tag detection device 3 is a device that can detect the tag device 2 by wireless communication. The tag detection devices 3 are installed at a plurality of locations in the watching area and are also called watching nodes. In the present embodiment, for example, a plurality of tag detection devices 3 are installed at street intersections, roadsides, school gates, entrances, libraries, parks, and the like. The tag detection device 3 has a tag reading function and is also called a tag reader device.

  As shown in FIG. 1, the tag detection device 3 includes an antenna 11 for performing wireless communication and a tag reading unit 12 for performing a tag reading process. The tag reading unit 12 includes a wireless transmission / reception unit 13 for performing wireless transmission / reception with the tag device 2, a microcomputer 14 for controlling the operation of the tag reading process, and a memory 15 in which information such as a detection device ID is recorded. . Further, the tag detection device 3 includes a control unit 16 for various operation controls and a time measuring unit 17 that measures the current time. In the example shown in FIG. 1, the tag device 2 includes a camera 18 and an image recording unit 19, and has a function of capturing an image of the person being watched over (school children).

  The guardian's terminal 4 is a terminal device that can communicate with the tag detection device 3 and the center device 5 via a network (for example, the Internet 20). The guardian's terminal 4 includes a display unit 21 such as a liquid crystal display, and a position display image indicating the position of the person to be watched (school children) is displayed on the display unit 21. The guardian's terminal 4 is, for example, a guardian's portable terminal (such as a mobile phone or PDA) or a personal computer.

  The center device 5 is a device having a server function capable of communicating with the tag detection device 3 via a network such as the Internet 20. As illustrated in FIG. 1, the center device 5 includes a detection history data collection unit 22 that collects detection history data (described later) sent from the tag detection device 3, and the collected detection history data for each tag ID (monitoring target). Detection history database unit 23 for each person). The center device 5 includes a map database unit 24 in which map data is recorded, and a behavior tendency analysis unit 25 that analyzes the behavior tendency of the person being watched over based on the detection history data and the map data.

  The center device 5 also creates a notification screen (position display screen) for creating a notification screen (position display screen) for notifying the guardian based on the analysis result of the behavior tendency analysis unit 25, and the created position display screen for the guardian. An Internet server unit 27 for transmitting to the terminal 4 is provided. The Internet server unit 27 has functions such as a Web server and a mail server. The center device 5 also includes a guardian request receiving unit 28 that receives various requests (such as a display request for a position display screen) from the guardian's terminal 4. When the notification screen creation unit 26 receives a display request from the guardian terminal 4 via the guardian request acceptance unit 28, the notification screen creation unit 26 creates a position display screen to be notified to the guardian terminal 4. The center device 5 includes a user information database unit 29 that stores user information as data related to authentication of the guardian's terminal 4.

  In this position display screen, a detection area including the position of the tag detection device 3 that has detected the tag device 2 held by the person being watched over is distinguished and displayed on the map. Note that the display system 1 of the present embodiment has various display modes (described later), and the display mode (shape, size, emphasis method, etc.) of the detection area depends on the display mode. Is different.

  Here, the behavior tendency analysis unit 25 will be described in more detail with reference to FIGS. 2 and 3. FIG. 2 is a diagram illustrating an example of the position of the tag detection device 3 and the movement route of school children. As shown in FIG. 2, for example, tag detection devices 3 (detection device IDs: A to N) are installed in 14 locations from a point A to a point N in a certain watching area, and a tag device 2 (tag A case will be described in which a schoolchild with ID: X) moves along a route indicated by a solid line in the drawing.

  In this case, the tag device 2 of the schoolchild is first detected by the tag detection device 3 at the point A, and then the point E, point F, point I, point K, point M, point K, point L, point K, J The tag detection device 3 detects the spot in the order of the spot, the spot H, and the spot A. Each time the tag detection device 3 detects the tag device 2, it transmits detection history data (tag ID, detection device ID, RSSI, detection time, etc.) to the center device 5. The RSSI (Received Signal Strength Indicator) is the received radio wave intensity when the tag detection device 3 detects the tag device 2.

  FIG. 3 is an explanatory diagram of detection history data recorded in the detection history database unit 23 when the watching target person moves along the route of FIG. In the example of FIG. 3, detection device ID, detection time, and RSSI data are recorded as detection history data of a certain tag device 2 (tag ID: X). In the detection history data of FIG. 3, for example, the tag device 2 with the tag ID “X” is detected by the tag detection device 3 with the detection device ID “A” at the detection time “15:00” with RSSI “large”. It has been shown.

  In the action history analysis unit 25, for each tag device 2 based on the detection history data as described above, the RSSI (reception) when the tag device 2 is detected for each tag detection device 3 that detects the tag device 2. Radio wave intensity) and number of detections (passing frequency). For example, in the example of FIG. 3, the number of times the tag detection device 3 with the detection device ID “A” has detected the tag device 2 with the tag ID “X” is “twice”, and the tag device 2 is detected. Each RSSI is “large”.

  Next, the notification screen creation unit 26 will be described in more detail with reference to FIG. FIG. 4 is a block diagram illustrating a configuration of the notification screen creation unit 26. As illustrated in FIG. 4, the notification screen creation unit 26 includes an enhancement level calculation unit 29 that calculates the enhancement level of the detection area, a detection area setting unit 30 that sets a position of the detection area to be displayed on the map, and a detection area. A display mode setting unit 31 for setting a display mode indicating the display mode, and a display image generating unit 32 for generating a position display image in which the detection areas are distinguished and displayed on the map. That is, it can be said that the center device 5 has a function of generating a position display image. This function is executed by a program stored in the HDD or memory (not shown) of the center apparatus 5. Here, the display image generation unit 32 corresponds to the display image generation means of the present invention.

  The enhancement degree calculation unit 29 calculates the enhancement degree of the detection area based on the RSSI received from the behavior tendency analysis unit 25 and the number of detections (passing frequency). Based on this enhancement degree, the size of the detection area is set. The detection area setting unit 30 sets a detection area to be displayed based on the detection device ID received from the behavior tendency analysis unit 25 and the map data received from the map database unit 24. The display mode setting unit 31 sets the display mode based on the display mode request received from the guardian terminal 4 via the guardian request receiving unit 28. In addition, when there is no display mode request | requirement from the terminal 4 for guardians, you may set so that a default display mode may be used.

  The display image generation unit 32 includes a highlight display unit 33 that highlights a detection area on a map, and a non-highlight display unit 34 that non-highlights a map image other than the detection area. Various types of image processing (described later) corresponding to the display mode are used as the highlight display and non-highlight display. The highlighting portion 33 corresponds to highlighting means of the present invention, and the non-highlighting display portion 34 corresponds to non-highlighting means of the present invention.

  Regarding the display system 1 configured as described above, first, the flow of the operation of the entire system will be described. Here, the flow of operation when a position display image is displayed on the guardian's terminal 4 will be described with reference to FIG.

  FIG. 5 is a diagram showing the flow of information in the processing of this system. As shown in FIG. 5, when the watching target person (school child) moves along a predetermined route (for example, the route shown in FIG. 2), the tag detection device 3 (detection device ID: A˜) arranged near the route. N), the tag device 2 possessed by the schoolchild is detected. In this case, for example, the tag device 2 having an RSSI (which may be a time average value of RSSI) of a predetermined threshold value or more is detected. Alternatively, when the tag device 2 can be switched between the high power mode and the low power mode, the tag device 2 whose RSSI in the high power mode is equal to or greater than a predetermined threshold is detected. This power switching may be switching from an active tag to a passive tag. A semi-active tag may be used instead of the active tag. The tag device 2 in which the number (or time) of reception within a predetermined period is equal to or greater than a predetermined threshold number (or threshold time) is detected.

  When the tag device 2 is detected, detection history data (tag ID, detection device ID, RSSI, detection time, etc.) is transmitted from the tag detection device 3 to the center device 5. In the center device 5, detection history data is collected by the detection history data collection unit 22, and detection history data is recorded in the detection history database unit 23 for each tag device 2 (tag ID).

  When the watch guardian displays the position display image on the guardian's terminal 4, the guardian's terminal 4 transmits a position display screen display request to the center device 5. At this time, a display mode request for designating a display mode may be transmitted from the parent terminal 4 to the center device 5 together with the display request. The notification screen creation unit 26 of the center device 5 creates a position display screen when receiving a display request from the guardian terminal 4 via the guardian request accepting unit 28, and the guardian terminal 4 via the Internet server unit 27. Send the position display screen to The position display screen received from the center device 5 is displayed on the display unit 21 of the guardian's terminal 4. The display position may be processed using time, RSSI, and detection time according to the purpose. The notification screen may be created not by the center device but by the guardian's terminal that has received the history information of the target tag.

  Next, various display modes of the display system 1 according to the present embodiment will be described with reference to FIGS.

(Track area highlight mode)
The display system 1 of the present embodiment is provided with a trajectory area emphasis display mode as one of display modes for emphasizing the detection area.

  FIG. 6 is an explanatory diagram showing an example of the trajectory area emphasis display mode. As shown in FIG. 6, in the trajectory area emphasis display mode, a linear trajectory area (hatched portion in FIG. 6) connecting the positions of the tag detection devices 3 that detected the tag device 2 on the map is highlighted on the map. Displayed. The line width of this locus area is set according to RSSI. For example, the line width is set to be thick when the RSSI is large, and the line width is set to be thin when the RSSI is small. The locus area is colored with a conspicuous color (for example, red) and is highlighted on the map. That is, in this case, it can be said that the highlighted locus area is overwritten on the map image as the background image.

(Block area highlight mode)
The display system 1 of the present embodiment is provided with a block area emphasis display mode as one of display modes for emphasizing the detection area.

  FIG. 7 is an explanatory diagram showing an example of the block area emphasis display mode. As shown in FIG. 7, in the block area highlight mode, the tag detection device 3 is connected on the map in the block area including the position of the tag detection device 3 that detected the tag device 2 or in the order in which the tag device 2 was detected. The block area including the locus (the hatched portion in FIG. 7) is displayed highlighted on the map. In the drawing, for convenience of explanation, a line for defining a block area is indicated by a broken line. However, this broken line may not be displayed on the display unit 21 of the guardian's terminal 4. Moreover, you may emphasize only the block containing the tag detection apparatus 3 which detected the tag apparatus 2 simply.

  This block area is a block-like area divided on the map based on the position of the tag detection device 3 in advance. The block area is colored with a conspicuous color (for example, red) and is highlighted on the map. That is, in this case, it can be said that the highlighted block area is overwritten on the map image as the background image.

  FIG. 8 is an explanatory diagram showing another example of the block area emphasis display mode. In the example shown in FIG. 8, a block area (a block area around the K point) where the number of detections (passage frequency) of the tag device 2 is large is displayed more emphasized than a normal block area. For example, the block area where the tag device 2 has a large number of detections is colored with a more conspicuous color (for example, dark red) than the normal block area.

  Further, although not particularly shown here, for example, a block area that takes a little trajectory may be emphasized weaker than a normal block area. For example, a block area that takes a little trajectory may be colored with a color that is slightly less noticeable than a normal block area (for example, light red).

(Circular area highlight mode)
The display system 1 of the present embodiment is provided with a circular area emphasis display mode as one of display modes for emphasizing the detection area.

  FIG. 9 is an explanatory diagram showing an example of the trajectory area emphasis display mode. As shown in FIG. 9, in the circular area emphasis display mode, a circular area (hatched portion in FIG. 9) centered on the position of the tag detection device 3 that has detected the tag device 2 is displayed highlighted on the map. The This circular area is colored with a conspicuous color (for example, red) and is highlighted on the map. That is, in this case, it can be said that the highlighted circular area is overwritten on the map image as the background image. The circular shape includes various shapes such as an ellipse and a polygon with rounded corners.

  In this case, although not particularly illustrated, a portion where the circular areas overlap may be displayed with more emphasis than the normal circular area. For example, a portion where the circular areas overlap with each other may be colored with a color that is more conspicuous than a normal circular area (for example, dark red).

  FIG. 10 is an explanatory view showing another example of the circular area highlight display mode. In the example shown in FIG. 10, the radius of the circular area is set according to RSSI. For example, when the RSSI is large, the radius is set large, and when the RSSI is small, the radius is set small. Alternatively, the circular area is set in a dark color with a small radius when the RSSI is large. In the former case, the outline of the behavior of the tag device holder can be easily grasped, and in the latter case, the behavior can be grasped with high accuracy.

  FIG. 11 is an explanatory view showing still another example of the circular area emphasis display mode. In the example shown in FIG. 11, a circular area (a circular area at the K point) where the number of times of detection (passage frequency) of the tag device 2 is high is displayed more emphasized than a normal circular area. For example, a block area where the tag device 2 has a large number of detections is colored with a more conspicuous color (for example, deep red) than a normal circular area.

(Pattern area highlight mode)
The display system 1 of the present embodiment is provided with a pattern area emphasis display mode as one of display modes for emphasizing the detection area.

  FIG. 12 is an explanatory diagram showing an example of the pattern area emphasis display mode. As shown in FIG. 12, in the pattern area emphasis display mode, the pattern area (shaded portion in FIG. 12) in the shape of the antenna sensitivity pattern of the tag detection device 3 that has detected the tag device 2 is displayed highlighted on the map. . For example, when the antenna 11 of the tag detection device 3 is an omnidirectional antenna, the pattern area has a circular shape (for example, the pattern area at the point A). On the other hand, when the antenna 11 of the tag detection device 3 is a directional antenna, the pattern area has the shape of an antenna beam gain pattern (for example, the pattern area at the point E).

  The size of this pattern area is set according to RSSI. For example, when the RSSI is large, the pattern area is set large, and when the RSSI is small, the pattern area is set small. The pattern area is colored with a conspicuous color (for example, red) and is highlighted on the map. That is, in this case, it can be said that the highlighted locus area is overwritten on the map image as the background image.

(Time change display mode)
The display system 1 of the present embodiment is provided with a time change display mode in which the display of the detection area is changed according to the time when the tag device 2 is detected.

  FIG. 13 is an explanatory diagram showing an example of a time change display mode. The example of FIG. 13 is obtained by applying the time change display mode to the circular area emphasis display mode of FIG. As shown in FIG. 13, in the time change display mode, a gradation change is applied to the coloring of the circular area according to the time when the tag device 2 is detected. For example, the circular area of the tag detection device 3 with the latest detection time of the tag device 2 is displayed in a dark color (for example, dark red), and the color of the circular area is increased as the detection time of the tag device 2 becomes older. Gradient changes are applied so that the thickness gradually decreases. Thus, in the time change display mode, it can be said that the time axis is represented by one position display image.

  Alternatively, from the color (for example, red) of the circular area of the tag detection device 3 having the latest time when the tag device 2 was detected, the color of the circular area (red, orange) as the time when the tag device 2 was detected becomes older. , Yellow, green, blue, purple). Further, a gradation change may be added so as to gradually change the color change and hue.

  FIG. 14 is an explanatory diagram showing another example of the time change display mode. In the example shown in FIG. 14, only a circular area of the tag detection device 3 with the latest detection time of the tag device 2 is provided with a thick frame surrounding the circular area. Although not particularly shown here, the time when the tag device 2 was detected surrounded the circular area of the latest tag detection device 3 with the thickest thick frame, and as the time when the tag device 2 was detected becomes older, the circular shape A gradation change may be applied so that the thick frame surrounding the area gradually becomes thinner.

(Non-highlight mode)
The display system 1 according to the present embodiment is provided with a non-highlighted display mode as one of display modes for non-highlighted display of map images other than the detection area compared to the map image of the detection area.

  FIG. 15 is an explanatory diagram showing an example of the non-highlight display mode. As shown in FIG. 15, in the non-highlight display mode, the map image (solid line portion in FIG. 15) of the block including the detection area of the tag detection device 3 that has detected the tag device 2 is displayed as usual, and the detection area is included. A map image (a broken line portion in FIG. 15) other than the block to be displayed is not highlighted. FIG. 15 shows an example in which the pattern area of FIG. 12 is used as the detection area, and the same block (not shown) as in FIG. 7 is used as the block. In FIG. 15, for convenience of explanation, the detection area (pattern area) is indicated by a solid line, but the solid line indicating the detection area may not be displayed on the display unit 21 of the guardian terminal 4. .

  The size of the block is set to a predetermined size that does not change. Alternatively, the size of the block is set according to RSSI. For example, when the RSSI is large, the block is set large, and when the RSSI is small, the block is set small.

  The size of the block may be set according to the number of times (or time) that can be received within a predetermined period. For example, the larger the number (or time) of reception within a predetermined period, the larger the block is set, and the smaller the number (or time) of reception within the predetermined period, the smaller the block is set.

  Further, the size of the block may be set according to the number of times the tag device 2 is detected continuously. For example, when the tag device 2 is continuously received a plurality of times (a predetermined threshold number or more) continuously, the block is set large, and when the tag device 2 is sparsely received, the block is set small.

  Image processing for non-highlighting includes blurred image processing (see FIGS. 15 and 16). The blurred image processing is image processing that blurs the outline of an image, and has an effect of rounding the apparent angle. In the block subjected to the blurred image processing, buildings and roads in the map image appear to be blurred. On the other hand, buildings and roads in the map image can be clearly seen in the blocks that have not been subjected to the blurred image processing.

  In addition, the image processing for non-highlighting includes image processing for reducing the saturation. In a block that has been subjected to image processing that lowers the saturation, the colors of buildings, roads, and the like in the map image appear light. On the other hand, in a block that has not been subjected to image processing for reducing saturation, the colors of buildings and roads in the map image appear vivid.

  Further, the image processing for non-highlighting includes image processing for reducing the contrast. In the block on which the image processing for reducing the contrast is performed, the buildings and roads in the map image become blurred. On the other hand, buildings and roads in the map image can be clearly seen in a block that has not been subjected to image processing for reducing contrast.

  In addition, the image processing for non-highlighting includes image processing for reducing the luminance. In a block that has been subjected to image processing for reducing the brightness, buildings and roads in the map image appear dark. On the other hand, in a block that has not been subjected to image processing for reducing the brightness, buildings and roads in the map image appear bright.

  The degree of non-emphasized display (for example, the blur amount) is set based on the degree of enhancement calculated by the degree-of-emphasis calculation unit 29. This enhancement degree includes, for example, a weighted average value of RSSI and the number of detections (or time) and a multiplication value of RSSI and the number of detections (or time).

  Note that only RSSI may be used as the degree of enhancement. For example, a block with a large RSSI may be displayed clearly, and a block with a small RSSI may be set with a larger blur amount.

  FIG. 16 is an explanatory diagram showing another example of the non-highlight display mode. In the example shown in FIG. 16, two-stage non-highlighted display is performed. That is, the map image of the block including the detection area of the tag detection device 3 that has detected the tag device 2 (solid line portion in FIG. 16) is displayed as usual, and the map image around the block including the detection area (in FIG. 16). The long broken line portion) is slightly highlighted, and the other map image (short broken line portion in FIG. 16) is not highlighted.

  In this case, the degree of non-emphasized display is set in two stages. In the example of FIG. 16, the degree of non-highlighting display (for example, the blur amount) may be set in two stages according to the combination of RSSI and the number of detections (or time). For example, a block with a large RSSI and a large number of detections is displayed clearly, a block with a large RSSI and a small number of detections is set with a small blur amount, and a block with a small RSSI and a small number of detections is set with a large blur amount. .

  According to the display system 1 according to the embodiment of the present invention, by providing the display image generation unit 32 that generates the position display image, the position of the person being watched over can be notified appropriately and accurately, It is possible to display the behavior tendency of the person being watched in an easy-to-understand manner, and also protect the privacy of the person being watched over.

  That is, in this embodiment, when the tag detection device 3 detects the tag device 2 held by the person being watched over (schoolchild), the detection area indicating the position of the tag detection device 3 is displayed separately on the map. The detection area has a predetermined size including the position of the tag detection device 3, and it is highly likely that the person to be watched has passed somewhere in the detection area. As a result, the guardian can be watched and notified to the guardian of a reasonably accurate position (see FIGS. 9 and 10).

  Since this detection area has a predetermined size, when a large number of detection areas are displayed on the display unit 21 of the guardian's terminal 4, the detection areas are overlapped. The place displayed as an overlap of the detection areas is highly likely to be a place where the person being watched over frequently visits. In this way, it is possible to display the behavior tendency of the person being watched over in an easy-to-understand manner.

  Further, since this detection area has a predetermined size, an excessively accurate position of the person being watched over is not displayed. Thereby, the privacy of the person being watched over can be protected. Conversely, when used for criminal investigations, it is also effective to increase the accuracy of tag position display by expressing the detection area in a small and dark color according to the RSSI value.

  In the highlight mode of the present embodiment, the detection area is highlighted on the map (for example, colored and displayed in red), so that the tendency of the person being watched over is easily understood (see FIG. 11). .

  In the present embodiment, the detection area can be set to an appropriate size based on RSSI. For example, when the RSSI is large, the detection area is set large, and when the RSSI is small, the detection area is set small. Thus, the detection area can be set to an appropriate size according to the behavior tendency of the person being watched over.

  In the present embodiment, the detection area can be set to an appropriate size based on the detection history. For example, the detection area is set large when the detection frequency is high, and the detection area is set small when the detection frequency is low. Thus, the detection area can be set to an appropriate size according to the behavior tendency of the person being watched over.

  In the trajectory area emphasis display mode, the trajectory area is displayed on the map, and the behavior tendency of the person being watched over becomes easy to understand. The line width of this locus area is set to an appropriate thickness according to RSSI. For example, the line width is set large when the RSSI is large, and the line width is set small when the RSSI is small. Thus, the line width can be set to an appropriate thickness according to the behavior tendency of the person being watched over.

  In the block area emphasis display mode, the block area is displayed on the map, and the behavior tendency of the person being watched over becomes easy to understand. The size of this block area is set to an appropriate size according to RSSI. For example, when the RSSI is large, the block area is set large, and when the RSSI is small, the block area is set small. Thus, the block area can be set to an appropriate size according to the behavior tendency of the person being watched over.

  In the circular area emphasis display mode, a circular area is displayed on the map, and the behavior tendency of the person being watched over becomes easy to understand. The diameter of this circular area is set to an appropriate length according to RSSI. For example, when the RSSI is large, the diameter of the circular area is set long, and when the RSSI is small, the diameter of the circular area is set short. In this manner, the diameter of the circular area can be set to an appropriate length according to the behavior tendency of the person being watched over (see FIG. 10).

  In the pattern area emphasis display mode, the pattern area is displayed on the map, and the behavior tendency of the person being watched over becomes easy to understand. The size of this pattern area is set to an appropriate size according to RSSI. For example, when the RSSI is large, the pattern area is set large, and when the RSSI is small, the pattern area is set small. Thus, the pattern area can be set to an appropriate size according to the behavior tendency of the person being watched over.

  In the time change display mode, it is possible to display information on the position of the person being watched over and information on the flow of time together. Thereby, it is possible to display the behavior of the person being watched over in an easy-to-understand manner (see FIGS. 13 and 14).

  In the non-highlight display mode, the map image other than the detection area is non-highlighted. Thereby, the privacy of the person being watched over can be protected.

  For example, the map image outside the detection area is displayed in a blurred manner. In addition, map images outside the detection area are displayed with low saturation. Further, the map image other than the detection area is displayed with low contrast. Further, the map image other than the detection area is displayed with low luminance. Thereby, the privacy of the person being watched over can be protected (see FIGS. 15 and 16).

  The embodiments of the present invention have been described above by way of example, but the scope of the present invention is not limited to these embodiments, and can be changed or modified according to the purpose within the scope of the claims. is there.

  For example, in the above description, the example in which the center device 5 has the function of generating the position display image has been described. However, the scope of the present invention is not limited to this, and the display image generation function is not limited to the guardian. The terminal 4 may be provided.

  Further, in the above description, each display mode has been described individually for convenience of description. However, the scope of the present invention is not limited to this, and two or more display modes may be applied in combination. Is possible. For example, the trajectory area emphasis display mode and the non-emphasis display mode can be applied in combination.

  As described above, the display system according to the present invention can appropriately and accurately notify the position of the person being watched over, can easily display the behavior tendency of the person being watched over, and the privacy of the person being watched over It is useful in that it can be used in a monitoring system or the like.

The block diagram which shows the structure of the display system in embodiment of this invention The figure which shows an example of the position of a tag detection apparatus, and the movement path | route of a schoolchild Explanatory drawing of detection history data recorded in the watch database Block diagram showing the configuration of the notification screen creation unit Diagram showing the flow of information from tag detection to screen display in the display system Explanatory drawing which shows an example of locus area emphasis display mode Explanatory drawing which shows an example of block area emphasis display mode Explanatory drawing which shows the other example of block area emphasis display mode Explanatory drawing which shows an example of a circular area emphasis display mode Explanatory drawing showing another example of the circular area highlight mode Explanatory drawing which shows the further another example of circular shaped area emphasis display mode. Explanatory drawing which shows an example of pattern area emphasis display mode Explanatory drawing which shows an example of a time change display mode Explanatory drawing which shows the other example of a time change display mode Explanatory drawing which shows an example of non-highlight display mode Explanatory drawing showing another example of non-highlight display mode

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Display system 2 Tag apparatus 3 Tag detection apparatus 4 Guardian's terminal 5 Center apparatus 21 Display part 25 Behavior tendency analysis part 26 Notification screen creation part 32 Display image generation part 33 Highlight display part 34 Non-emphasis display part

Claims (16)

A tag device held by the person being watched over, a tag detection device installed at a plurality of locations in the watch area and capable of detecting the tag device, and a terminal for a guardian used by a guardian who watches the person being watched over In a display system that displays the position of the person to be watched on the guardian terminal based on the detection result of detecting the tag device by the tag detection device,
A display that generates a position display image in which a detection area having a predetermined size including the position of the tag detection device that has detected the tag device is distinguished and displayed on a map as an image that displays the position of the person being watched over A display system comprising image generation means.   The display system according to claim 1, wherein the display image generation unit includes a highlight display unit that highlights the detection area on a map.   The display system according to claim 1, wherein the size of the detection area is set based on a received radio wave intensity when the tag detection device detects the tag device.   The display system according to claim 1, wherein the size of the detection area is set based on a detection history in which the tag detection device detects the tag device.   The detection area is a line-shaped trajectory area that connects the positions of the tag detection devices that detected the tag device on a map, and the line width of the trajectory area is detected by the tag detection device. The display system according to claim 1, wherein the display system is set according to the received radio field intensity.   The detection area is a block-shaped block area in which a map including a position of the tag detection device that detected the tag device is divided in advance, and according to the received radio wave intensity when the tag detection device detects the tag device. 5. The display system according to claim 1, wherein the display of the block area including the position of the tag detection device is changed.   The detection area is a circular area centered on the position of the tag detection device that has detected the tag device, and the size of the circular area is received when the tag detection device detects the tag device. The display system according to any one of claims 1 to 4, wherein the display system is set according to a radio wave intensity.   The detection area is a pattern area of the antenna sensitivity pattern shape of the tag detection device that has detected the tag device, and the size of the pattern area is the received radio wave intensity when the tag detection device detects the tag device. The display system according to any one of claims 1 to 4, wherein the display system is set according to the above.   The display system according to claim 2, wherein the highlighting unit changes highlighting of the detection area according to a time when the tag device is detected.   10. The display image generating means includes non-highlight display means for non-highlighting a map image other than the detection area as compared with a map image of the detection area. Display system as described in.   The display system according to claim 10, wherein the non-emphasizing display unit blurs and displays a map image other than the detection area compared to a map image of the detection area.   The display system according to claim 10, wherein the non-emphasizing display unit displays a saturation of a map image other than the detection area lower than a map image of the detection area.   The display system according to claim 10, wherein the non-emphasizing display unit displays a contrast of a map image other than the detection area lower than a map image of the detection area.   The display system according to claim 10, wherein the non-emphasizing display unit displays a brightness of a map image other than the detection area lower than that of the map image of the detection area. A display method used in the display system according to claim 1,
Detect the tag device held by the person being watched over,
Identify the position of the tag detection device that detected the tag device,
A detection area including the tag detection position is identified;
Generating position display image data in which the identified detection area is displayed separately on a map;
A display method comprising: displaying the position display image data on a guardian terminal used by a guardian who watches the person being watched over. A program for a display system according to claim 1,
On the computer,
A process of receiving information that detects the tag device held by the person being watched over,
A process of identifying the tag detection position from the position of the tag detection apparatus that detected the tag apparatus;
Processing for specifying a detection area including the tag detection position;
Processing for generating position display image data in which the identified detection area is displayed separately on a map;
Processing for displaying the position display image data on a guardian terminal used by a guardian who watches the person being watched over;
A program characterized by having executed.

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