JP2010127619A - Information presenting device, information presenting system, method of presenting information, and program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a technique for presenting information for determining a tour course for rapidly transmitting information while covering as many one's counter parties as possible, to whom information should be transmitted. <P>SOLUTION: An information presenting device has: an estimation means for estimating propagation characteristics of information around a trace according to information on space around the trace of an information source for dispatching information and dispatch characteristics of the information source; and a presenting means for obtaining a transmission range of information from an area around the trace of the information source according to a result estimated by the estimation means so as to present it. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a technique for estimating the reach of information emitted by a mobile object.

  As a method for flexibly transmitting information to local residents, a method in which a mobile body equipped with an information transmission unit travels around a region while emitting information is generally used. For example, a disaster prevention information from a local government is transmitted using a public information vehicle as a mobile body, an election speech is transmitted to voters by using an electoral district vehicle, or sales information is transmitted using a traveling vehicle. Is mentioned.

  When performing information transmission activities using such a method, it is important to transmit information to more partners within a limited time. For this reason, it is necessary to circulate a route through which information can be transmitted quickly while covering as many opponents as desired.

  However, since propagation characteristics of waves used for transmitting information such as sound, radio waves, and light are generally complex in an urban space, it is difficult to grasp the spatial transmission range of information.

  As a method for grasping the spatial transmission range of information, Patent Document 1 discloses a method for estimating a propagation range when information is transmitted by sound.

  In Patent Document 1, a sound propagation range is estimated by obtaining a sound propagation path from a sound source using a geometric technique. The geometric method is a method for estimating a sound propagation range by obtaining a sound propagation path from a sound source by a geometric method. Specific methods include the acoustic ray method in which multiple acoustic rays are emitted from the sound source at equal solid angle intervals to track and calculate the reflection propagation path, and the mirror image of the sound source from each surrounding wall is geometrically determined and received. There is a mirror image method for obtaining a propagation path from a sound ray connecting a sound point and each mirror image.

  Furthermore, Non-Patent Document 1 and Patent Document 5 describe a technique for displaying the estimation result of the sound transmission range.

  Non-Patent Document 1 describes a method of estimating a geographical distribution of noise caused by movement of a railway vehicle, and displaying on the map the geographical distribution of noise that changes with time according to a preset movement pattern of the vehicle. ing. Further, there is described a method of displaying on a map a geographical distribution of noise estimated by arranging sound sources according to traffic statistics such as traffic volume and traveling speed on a road.

  Further, Patent Document 5 describes a method for estimating noise from the actual measurement value of sound and building information.

  On the other hand, as a technique for determining an efficient patrol route, there is a system that derives the shortest route of a moving body based on the current position of the moving body and a specified destination point and waypoint and guides it to the driver. It is described in Patent Document 4. In this patent document 2, a travel distance is calculated for all combinations of a destination and a transit point, a transit point different from a transit point, and a transit point and a destination using a technique for searching for the shortest route between two points. A technique is described in which the order of passage of a waypoint that minimizes the accumulated distance between the destination and the destination is obtained, and the route that passes through the waypoint in the order is guided to the driver as the optimum route.

In addition to the technique described in Patent Document 2, as a technique for searching for the shortest path between two points, a path searching technique such as “MOORE method” or “DIJKSTRA method” in graph theory is generally used. . Regarding the MOORE method, for example, Patent Document 3 describes a specific algorithm.
JP 2006-58245 A JP 2001-66148 A JP-A-5-73798 JP 2004-085537 A JP 2005-030918 A Kiyoshi Masuda: Noise propagation simulation in urban and architectural spaces, Visualization Society of Japan, 10th Visualization Conference, 1-3, 2004

  The above-described technology has a problem that it is difficult to accurately determine a patrol route that can transmit information quickly while covering as many parties as possible to transmit information. For example, the techniques of Patent Document 1 and Non-Patent Document 1 disclose a method of estimating a spatial propagation range of sound emitted from a sound source and displaying it on a map. However, when a mobile body passes through a patrol route, it is impossible to grasp how much the other party to whom information is to be covered can be covered. For this reason, there is a problem that it is difficult to evaluate the information transmission range of the traveling route that has already passed and to determine the route to be visited.

  Further, in the technique of Patent Document 2, a system is disclosed in which a shortest route connecting two points is derived and route guidance is presented to the driver of the mobile body. It is not possible to guide a travel route that maximizes the rate of transmission. For this reason, the route guidance system according to the above-described technique has a problem in that there is a possibility that a traveling route in which information is not distributed to the other party to be transmitted may be selected although the time required for the traveling is short.

  Therefore, the problem to be solved by the present invention is to provide a technique for presenting information for determining a patrol route capable of promptly transmitting information while covering as many opponents as possible to transmit information.

  The present invention for solving the above-mentioned problem is an information presentation device, which propagates information in the vicinity of the trajectory from information related to the space around the trajectory of the information source that transmits information and the transmission characteristics of the information source. An estimation means for estimating characteristics, and a presentation means for obtaining and presenting a transmission range of information in a surrounding area of the locus of the information source from the estimation result of the estimation means.

  The present invention for solving the above-mentioned problems is an information presentation system, an acquisition means for acquiring position information of an information source that transmits information, and information related to a surrounding space of a locus in which a history of the acquired position information is recorded And an estimation means for estimating propagation characteristics of information in the vicinity of the trajectory from the transmission characteristics of the information source, and an information transmission range in an area around the trajectory of the information source is obtained from the estimation result of the estimation means. And presenting means for presenting.

  The present invention for solving the above-mentioned problem is an information presentation method, and information propagation in the vicinity of the trajectory is based on information related to the space around the trajectory of the information source that transmits information and the transmission characteristics of the information source. An estimation step for estimating characteristics, and a presentation step for obtaining and presenting a transmission range of information in a peripheral area of the locus of the information source from an estimation result in the estimation step.

  The present invention for solving the above-described problem is a program for an information presentation device, wherein the program causes the information presentation device to transmit information about a space around a locus of an information source that transmits information, and transmission of the information source. An estimation means for estimating propagation characteristics of information in the vicinity of the trajectory from the characteristics, and a presentation means for obtaining and presenting a transmission range of information in the peripheral area of the trajectory of the information source from the estimation result of the estimation means It is characterized by making it.

  ADVANTAGE OF THE INVENTION According to this invention, the information for judging the effective patrol route can be provided with respect to the driver | operator of the mobile body which transmits information to the circumference | surroundings while patroling. Thereby, it becomes easy to determine the traveling route of the mobile body toward the information non-transmission area, and information can be quickly transmitted to more recipients. The reason is that it shows how much you can cover the person you want to convey information when you pass through the patrol route, and the configuration that guides the mobile driver by deriving the patrol route that maximizes the coverage range It is in having adopted.

[First embodiment]
A first embodiment of the present invention will be described in detail with reference to the drawings. In the following, information transmission by sound will be described as an example in the present invention. However, the present invention is not limited to a form using sound waves, and sound and radio waves can be used without departing from the basic technical idea of the present invention. Information transmission using various waves propagating in space such as light may be used.

  The information presentation system of the present invention includes a mobile object and an information presentation device.

  FIG. 1 is a diagram showing a configuration of an information presentation apparatus according to the first embodiment of the present invention.

  The information presentation apparatus 100 includes a position information acquisition unit 101 that acquires position information of a mobile object that is a transmission source of information, a tour route recording unit 102 that records a tour route that is a trajectory that the mobile object has already passed, and a mobile object. Device characteristic DB 103 of the transmitter storing the device characteristics of the information transmission unit included in the map, the map information DB 104 storing the map information, and the propagation characteristic estimation for estimating the sound propagation characteristics around the traveling path of the mobile object Unit 105, a transmission range evaluation unit 106 that evaluates a spatial transmission range of information by sound, and a display unit 107 that displays an evaluation result.

  The position information acquisition unit 101 acquires information related to the position of the moving object from a position acquisition apparatus such as a GPS, if necessary, when the traveling path evaluation apparatus 100 of the moving object is mounted on the moving object. On the other hand, when the mobile route evaluation apparatus is used on a desk, the position information acquisition unit 101 receives information about the position of the mobile body notified from the mobile body or the mobile body input by the user of the apparatus to the device. Information on the position of the

  The traveling route recording unit 102 periodically acquires the position of the moving object from the position information acquisition unit 101, records the position of the moving object in order, and records the geographical trajectory.

  The device characteristic DB 103 of the transmitter relates to information related to device characteristics such as the magnitude of output and spatial output directivity, that is, the propagation characteristics of sound emitted from the transmission source, with respect to the information transmitter provided in the mobile body. The information to be stored is stored.

  The map information DB 104 stores map information, terrain information of the stored map, information such as the shape and geographical distribution of buildings standing on the stored map. The map information stored in the map information DB 104 is associated so that the position information acquired by the position information acquisition unit 101 can indicate where in the map information.

  The propagation characteristic estimation unit 105 acquires, from the map information DB 104, information on the topography of the area indicated by each position information indicated on the tour route acquired from the tour route recording unit 102 and the surrounding buildings. Based on the acquired information on the terrain and surrounding buildings, and the information on the device characteristics of the information transmitter provided in the moving body acquired from the device characteristic DB 103 of the transmitter, the sound propagation characteristics around the traveling path of the moving body are estimated. For the estimation of the sound propagation characteristics in the propagation characteristic estimation unit 105, the estimation technique described in Patent Document 1 may be used as necessary.

  The transmission range evaluation unit 106 estimates and evaluates the spatial transmission range of sound along the cyclic route based on the sound propagation characteristics estimated by the propagation characteristic estimation unit 105.

  The display unit 107 obtains the traveling route of the moving body acquired from the traveling route recording unit 102, the map of the area indicated by each position information in the traveling route acquired from the map information DB 104, and the propagation characteristic transmission range evaluation unit 106. The spatial transmission range of the sound is overlaid and displayed.

  Next, the operation of the information presentation apparatus according to the present embodiment will be described in detail with reference to the drawings.

  FIG. 2 is a flowchart for explaining the operation of the information presentation apparatus according to the present embodiment.

  Referring to FIG. 2, first, the position information acquisition unit 101 acquires position information of a moving body that is an information transmission source (step S <b> 101).

  The traveling route recording unit 102 records the location information acquired by the location information obtaining unit 101 and records it as a traveling route as a trajectory of the moving body (step S102). The recorded cyclic route is delivered to the propagation characteristic estimation unit 105.

  First, the propagation characteristic estimation unit 105 acquires information on buildings and terrain existing around the circulation route from the map information DB 104 using the position information indicated in the circulation route (step S103).

  Subsequently, the propagation characteristic estimation unit 105 acquires information on the device characteristics of the transmitter mounted on the mobile body from the device characteristic DB 103 (step S104).

  Based on the information acquired in steps S103 and S104, the sound propagation characteristics around the traveling path of the moving object are estimated (step S105). Here, the sound propagation characteristic means a parameter such as an attenuation amount or a propagation delay time generated according to the distance from the sound source.

  Next, based on the sound propagation characteristics estimated by the propagation characteristic estimation unit 105, the transmission range evaluation unit 106 estimates and evaluates the spatial transmission range of the sound along the cyclic route (step S106). . Here, the spatial transmission range of the sound is obtained by arranging a plurality of observation points on a map around the cyclic route, and calculating the sound reception level and the degree of echo at each observation point from the sound propagation characteristics, Judgment is made by comparing predetermined threshold values. If the reception level and echo at the observation point satisfy the quality at which sound information can be heard, it is determined that the sound information can be heard at the observation point, and the geographical range determined by the set of observable observation points is determined. The spatial transmission range. For example, a method known as Voronoi division can be used as a method for determining a geographical range from a set of observation points. That is, for each observation point, a region (Voronoi region) in which the observation point is the nearest observation point is obtained for each observation point by a boundary line determined by drawing a perpendicular bisector between adjacent observation points, and is included in the set The geographical range can be determined by the sum of Voronoi regions corresponding to the observation points.

  Using the traveling route of the moving body acquired from the traveling route recording unit 102, the map and terrain around the traveling route acquired from the map information DB 104, and the spatial transmission range of the sound obtained by the transmission range evaluation unit 106, the map It outputs to the display part 107 so that a patrol route and a transmission range may be displayed on it, and complete | finishes (step S107).

  FIG. 3 is an example of the screen display output in step S107. Referring to FIG. 3, the distribution of buildings 205 and roads 206 is displayed in the evaluation target area 200. Further, in the evaluation target area 200, a traveling route 203 connecting the departure point 201 of the moving body and the current point 202 is displayed, and a transmission range 204 of sound information is displayed along the traveling route 203.

  As described above, according to the first embodiment of the present invention, the configuration is such that the transmission range of sound information is estimated along a traveling route of a moving body within a specific area, and the transmission range is displayed on a map. Since it is adopted, it is possible to provide information for determining an effective patrol route to a mobile driver who transmits information to the surroundings while patroling.

  In addition, the driver of the mobile object can grasp the range in which information has already been transmitted along the patrol route, and can accurately determine the route that needs to be patrol in the future.

[Second Embodiment]
Next, a second embodiment of the present invention will be described with reference to the drawings. In the second embodiment of the present invention, an area where a partner to whom information is to be transmitted exists is designated in advance, and a result of evaluating how much a traveling route can cover the area can be presented. Hereinafter, the same components and operation steps as those in the first embodiment described above will be denoted by the same reference numerals, detailed description thereof will be omitted, and differences will be mainly described.

  FIG. 4 is a diagram showing a configuration of an information presentation apparatus according to the second embodiment of the present invention. Referring to FIG. 4, the mobile information presentation apparatus 100 according to the present embodiment has an input unit 108 for designating an area where there is a partner to whom information is to be transmitted, with respect to the configuration of the first embodiment described above. A coverage rate evaluation unit 109 that evaluates how much the area is covered by the patrol route is added.

  The coverage rate evaluation unit 109 compares the area acquired from the input unit 108 with the transmission range of the sound information acquired from the transmission range evaluation unit 106, and outputs the evaluation result to the display unit 107.

  Next, the operation of the information presentation apparatus according to the present embodiment will be described in detail with reference to the drawings. FIG. 5 is a flowchart for explaining the operation of the information presentation apparatus according to the present embodiment. Steps S101 to S106 are the same as those in the first embodiment described above, and a description thereof will be omitted.

  In step S <b> 108, a geographical range where a partner to whom information is to be transmitted exists is specified via the input unit 108.

  In step S109, the geographical range (area) designated in step S108 is compared with the transmission range of the sound information acquired from the transmission range evaluation unit 106, and the area is determined according to the transmission range of the sound information along the cyclic route. How much is covered is determined by area ratio (coverage ratio).

  In step S107, in addition to the information output in the first embodiment described above, the coverage obtained in step S109 is output to the display unit 107 and the process ends.

  FIG. 6 is an example of the screen display output in step S107. Referring to FIG. 6, in addition to the information output in the first embodiment, an area 207 and a coverage ratio 208 in which there is a partner to whom the information specified in step S108 is to be transmitted are displayed.

  As described above, according to the second embodiment of the present invention, in addition to the configuration of the first embodiment described above, an area where a partner to whom information is to be transmitted exists is specified, and the area is determined by a cyclic route. A configuration for evaluating how much sound information is covered is adopted. For this reason, in addition to the effects of the first embodiment described above, the driver of the moving body quantitatively grasps the range in which information has already been transmitted along the patrol route, and determines the route that needs to go around in the future. It can be decided more accurately.

[Third embodiment]
Next, a third embodiment of the present invention will be described in detail with reference to the drawings. In the third embodiment of the present invention, an area where a partner to whom information is to be transmitted exists is designated in advance, and a circular route that maximizes the ratio of covering the area can be automatically searched and presented. is there. Hereinafter, the same components and operation steps as those of the above-described second embodiment will be denoted by the same reference numerals, and the differences will be mainly described.

  FIG. 7 is a diagram showing a configuration of an information presentation apparatus according to the third embodiment of the present invention. Referring to FIG. 7, the information presentation apparatus 100 according to the present embodiment replaces the traveling route recording unit 102 with a traveling route search unit 110 in addition to the configuration of the above-described second embodiment, and further includes a traveling route selection unit. 111 is added.

  The traveling route search unit 110 includes the road information acquired from the map information DB 104, the position information of the moving body acquired from the position information acquisition unit 101, and the information on the waypoints and destinations specified via the input unit 108. In addition, a route connecting the current location and the destination through the waypoint is searched. For the route search in the cyclic route search unit 110, the search technique described in Patent Document 3 can be used as necessary.

  The cyclic route selection unit 111 selects the cyclic route candidate based on the cyclic route candidate derived by the cyclic route search unit 110 and the coverage rate evaluated by the coverage rate evaluation unit 109 for the cyclic route candidate. It is determined whether or not the route is selected.

  Next, the operation of the information presentation apparatus according to the present embodiment will be described in detail with reference to the drawings. FIG. 8 is a flowchart for explaining the operation of the information presentation apparatus according to the present embodiment. Steps S101, S103 to S106, and step S109 are the same as those in the second embodiment described above, and a description thereof will be omitted.

  First, in step S110, information on a geographical range where a partner to whom information is to be transmitted, a waypoint to pass through, and a destination is specified via the input unit. If no waypoints are designated here, the top several points in the densely populated area within the geographical range where the other party to whom information is to be transmitted exist are set as initial values of the waypoints. If the destination is not specified, the same point as the current location is set. When the geographical range where the other party to whom information is to be transmitted is not specified, the entire range of the map displayed on the display unit 107 is set.

  When the above input is completed, the route search unit 110 uses the location information of the moving object acquired from the location information acquisition unit 101 and the information on the waypoint and the destination specified via the input unit 108, and the waypoint A route connecting the current location and the destination through the route is searched (step S111).

  Next, it is determined whether the time (required time) required to move the searched route is within a predetermined range (step S112). Here, when the required time is not within the range, another route is searched again (step S111).

  On the other hand, when the required time is within the range, the searched route is set as a candidate for a traveling route.

  Thereafter, the same processing from step S103 to step S109 as in the second embodiment described above is performed on the cyclic route candidate, and in the cyclic route selection unit 111, the cyclic route candidate has a coverage ratio equal to or higher than the required value. It is determined whether or not it is achieved (step S113). Here, if the coverage ratio for the candidate for the route is lower than the required value, a densely populated area that is not set as a waypoint within the geographical range specified in step S110 is newly added to the waypoint (step S113). ), The route is searched again (step S111).

  On the other hand, if the coverage rate for the cyclic route candidate is greater than or equal to the required value, the cyclic route candidate is presented on the display unit 107 as a cyclic route.

  In step S115, in addition to the information output in the second embodiment described above, the cyclic route selected by the cyclic route selection unit 111, the transmission range of sound information along the cyclic route, and the case of passing through the cyclic route The cover rate is output to the display unit 107 and the process ends.

  FIG. 9 is an example of the screen display output in step S115. Referring to FIG. 9, in addition to the information output in the second embodiment, the destination point 211 and waypoint 210 specified in step S110, the tour route 212 selected by the tour route selection unit 111, and the tour route are supported. The coverage 209 corresponding to the transmission range 213, the traveling route from the departure point to the current point, and the traveling route from the current point to the destination point are displayed.

  As described above, according to the third embodiment of the present invention, in addition to the configuration of the second embodiment described above, a configuration for automatically deriving a cyclic route that satisfies a predetermined coverage and has a short travel time is provided. Adopted. For this reason, in addition to the effect of the second embodiment described above, the driver of the moving body can more accurately determine a route for effectively circulating the range where the other party to whom information is to be transmitted exists.

  In addition, it becomes easy to determine the traveling route of the mobile body toward the area where information is not transmitted, and information can be quickly transmitted to more recipients. The reason is that it shows how much you can cover the person you want to convey information when you pass through the patrol route, and the configuration that guides the mobile driver by deriving the patrol route that maximizes the coverage range It is in having adopted.

  The present invention described above can be configured by hardware, as is apparent from the above description, but can also be realized by a computer program.

  Functions and operations similar to those of the above-described embodiments are realized by a processor that operates with a program stored in a program memory. Note that some of the functions of the above-described embodiments can be realized by a computer program.

It is a figure which shows the structure of the information presentation apparatus by the 1st Embodiment of this invention. It is a flowchart explaining operation | movement of the information presentation apparatus by the 1st Embodiment of this invention. It is an example of the screen display output by the information presentation apparatus by the 1st Embodiment of this invention. It is a figure which shows the structure of the information presentation apparatus by the 2nd Embodiment of this invention. It is a flowchart explaining operation | movement of the information presentation apparatus by the 2nd Embodiment of this invention. It is an example of the screen display output by the information presentation apparatus by the 2nd Embodiment of this invention. It is a figure which shows the structure of the information presentation apparatus by the 3rd Embodiment of this invention. It is a flowchart explaining operation | movement of the information presentation apparatus by the 3rd Embodiment of this invention. It is an example of the screen display output by the information presentation apparatus by the 3rd Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 Information presentation apparatus 101 Position information acquisition part 102 Traveling route recording part 103 Device characteristic DB of a transmitter
104 Map information DB
105 propagation characteristic estimation unit 106 transmission range evaluation unit 107 display unit 108 input unit 109 coverage rate evaluation unit 110 route search unit 111 cyclic route selection unit 200 evaluation target area 201 departure point 202 current point 203, 212 cyclic route 204, 213 transmission range 205 Building 206 Road 207 Area 208, 209 Coverage 210 Information Point 211 Destination Point

Claims (14)

Estimating means for estimating propagation characteristics of information in the vicinity of the trajectory from information on the surrounding space of the trajectory of the information source that transmits information and the transmission characteristics of the information source;
An information presentation apparatus comprising: a presentation unit that obtains and presents a transmission range of information in a peripheral area of the locus of the information source from the estimation result of the estimation unit.   The information presentation apparatus according to claim 1, further comprising a calculation unit that calculates an area ratio occupied by the transmission range in a predetermined area.   Selection means for searching for a route connecting a predetermined transit point, current point, and destination point located in a peripheral area of the locus of the information source, and selecting a route having the maximum area ratio among the searched routes The information presentation apparatus according to claim 1, further comprising:   4. The information presenting apparatus according to claim 3, wherein the selection unit searches for a route by setting the waypoint as a densely populated area in the predetermined area.   The selection means, when the area ratio is below a threshold value, searches for a route by adding the most populated area that is not designated as the waypoint among the predetermined areas to a new waypoint. The information presentation apparatus according to claim 3 or 4, characterized by the above-mentioned.   6. The information presenting apparatus according to claim 1, wherein the estimating means estimates a sound propagation characteristic in space. Obtaining means for obtaining position information of an information source for transmitting information;
Estimating means for estimating propagation characteristics of information in the vicinity of the trajectory from information on the surrounding space of the trajectory in which the history of the acquired position information is recorded, and transmission characteristics of the information source;
An information presentation system comprising: a presentation unit that obtains and presents a transmission range of information in a surrounding area of the locus of the information source from the estimation result of the estimation unit. An estimation step for estimating propagation characteristics of information in the vicinity of the locus from information on the surrounding space of the locus of the information source that transmits information and the transmission characteristics of the information source;
An information presentation method comprising: a presentation step of obtaining and presenting a transmission range of information in a peripheral area of the locus of the information source from the estimation result in the estimation step.   The information presentation method according to claim 8, further comprising a calculation step of calculating an area ratio occupied by the transmission range in a predetermined area.   A selection step of searching for a route connecting a predetermined transit point, a current point, and a destination point located on the surrounding area of the locus of the information source, and selecting a route having the maximum area ratio among the searched routes 10. The information presentation method according to claim 8 or 9, characterized by comprising:   The information presenting method according to claim 10, wherein the selection step searches for a route by setting the waypoint as a densely populated area in the predetermined area.   In the selection step, when the area ratio is lower than a threshold value, a route is searched by adding, to a new waypoint, an area where the population is most concentrated and not designated as the waypoint in the predetermined area. The information presentation method according to claim 10 or 11, characterized in that:   13. The information presentation method according to claim 8, wherein the estimating step estimates a sound propagation characteristic in space. A program for an information presentation device, the program comprising:
Estimating means for estimating propagation characteristics of information in the vicinity of the trajectory from information on the surrounding space of the trajectory of the information source that transmits information and the transmission characteristics of the information source;
A program that functions as a presentation unit that obtains and presents a transmission range of information in a peripheral area of a locus of the information source from an estimation result of the estimation unit.

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