JP2006195909A - Facility retrieval device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a low-cost facility retrieval device capable of improving the accuracy of facility retrieval. <P>SOLUTION: This facility retrieval device has: a history data management part 16 sequentially storing information related to a passed spot as history data; an instruction recognition part 11 recognizing an inputted instruction; an information retrieval part 13 reading the history data when tracing back from a present time point by a prescribed time from the history data management part when the instruction recognition part recognizes that the instruction of the retrieval is performed, and retrieving information about a facility according to a retrieval condition included in the instruction recognized by the instruction recognition part with a spot shown by the read history data as a base; and a result output part 14 outputting a result obtained by performing the retrieval by the information retrieval part. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a facility search apparatus that is applied to, for example, a navigation apparatus, and more particularly to a technique for searching surrounding facilities while moving.

  Conventionally, a navigation apparatus having a facility search function is known. As one of such navigation devices, there is an interactive navigation device that can respond to the utterance of a word meaning a direction such as “left” or “right” by a user by linking with map data. It is known (see, for example, Patent Document 1).

  In this navigation device, words for instructing a user's search such as “What is the building on the left side” and “Is there a convenience store on the left side” input from the microphone are recognized by voice. Then, the search direction such as the search genre, the search range, and the front, rear, left and right is determined from the result of the speech recognition and set as the search condition. In the search unit, data in the facility / place name memory is searched according to the search condition. When a plurality of candidates are obtained by this search, the candidate order determination unit determines the candidate presentation order, and after conversion into voice data by the voice generation unit, for example, “○ Search results such as “Is a building” and “I have a xx mart” are output by voice. This navigation device can be searched even if the user does not strictly indicate the facility.

JP 2001-133283 A

  However, in the navigation device described in Patent Document 1 described above, the search is performed based on the location where the user is currently located. Therefore, when searching for a remote object such as a mountain, the user instructs the search. It does not matter if the position of the navigation device moves afterwards, but when searching for a nearby building, the direction and distance will change greatly even if the position of the navigation device moves slightly after the user instructs the search. As a result, there is a problem that the search becomes difficult. Such a problem can be solved by increasing the processing speed of the navigation device, but there is a limit to the speeding up, especially when trying to reduce the size, it becomes difficult to increase the processing speed and the cost of the device increases. There is a problem of doing.

  The present invention has been made to solve the above-described problems, and an object thereof is to provide an inexpensive facility search apparatus capable of improving the accuracy of facility search.

  In order to achieve the above object, the facility search device according to the present invention includes a history data management unit that sequentially stores information relating to passing points as history data, an instruction recognition unit that recognizes an input instruction, and an instruction recognition unit When it is recognized that a search instruction has been made in step (b), the history data at a time point that is a predetermined time before the current time is read from the history data management unit, and the point recognition unit is based on the point indicated by the read history data. And an information search unit that searches for facility information according to the search condition included in the instruction recognized in step (b), and a result output unit that outputs a result searched by the information search unit.

  In the facility search device according to the present invention, a history data management unit that sequentially stores information relating to passing points as history data, an instruction recognition unit that recognizes an input instruction, and an instruction recognition unit instructed to perform a search Is recognized from the history data management unit and included in the instruction recognized by the instruction recognition unit with reference to the point indicated by the read history data. An information search unit that searches for facility information according to the search conditions, and a result output unit that outputs the results searched by the information search unit.

  According to the present invention, information on points that have passed is sequentially stored as history data, and when a search is instructed, the indication is based on the point indicated by the history data at a time point that is a certain time back from the current time. Since the facility information is searched according to the search conditions included in the search, it is possible to perform a search based on the point that existed when the user instructed the search. Therefore, the facility search accuracy can be improved with an inexpensive configuration.

  According to the present invention, information on points that have passed is sequentially stored as history data, and when a search is instructed, with reference to a point indicated by history data of a point that is a certain distance back from the local point, Since the facility information is searched according to the search condition included in the instruction, it is possible to perform a search based on the point where the user has instructed the search. Therefore, the facility search accuracy can be improved with an inexpensive configuration.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the following, it is assumed that the facility search device according to Embodiment 1 of the present invention is realized on a navigation device.
Embodiment 1 FIG.
First, the outline of the facility search apparatus according to Embodiment 1 of the present invention will be described. FIG. 1 is a block diagram illustrating a schematic configuration of the facility search apparatus according to the first embodiment. This facility search device is composed of an input device 1, a position detection device 2, a user data detection device 3, an output device 4, and a navigation control device 5.

  The input device 1 is used to input a facility search instruction. The facility search instruction input from the input device 1 is sent to the navigation control device 5 as search instruction data. The position detection device 2 detects its current position and altitude. The current position and altitude detected by the position detection device 2 are sent to the navigation control device 5 as current position data.

  The user data detection device 3 detects user data (details will be described later). User data detected by the user data detection device 3 is sent to the navigation control device 5. The output device 4 is used for outputting the result of the facility search. The output device 4 outputs information about the searched facility based on the search result data sent from the navigation control device 5.

  The navigation control device 5 executes a facility search based on the search instruction data input from the input device 1, the current position data detected by the position detection device 2, and the user data detected by the user data detection device 3, The search result is sent to the output device 4 as search result data. The navigation control device 5 includes an instruction recognition unit 11, a data management unit 12, an information search unit 13, and a result output unit 14.

  The instruction recognition unit 11 analyzes the search instruction data transmitted from the input device 1 and instructs the information search unit 13 to search for facilities based on the analysis result. The data management unit 12 manages various data used in the facility search device. The data management unit 12 includes a current data management unit 15, a history data management unit 16, a facility data management unit 17, and a map data management unit 18.

  The current data management unit 15 acquires current position data from the position detection device 2, acquires user data from the user data detection device 3, and creates current data by collecting these current position data and user data. . As will be described later, the current data is used for realizing various functions such as map display and facility search. The current data created by the current data management unit 15 is sent to the information search unit 13 and the history data management unit 16.

  The history data management unit 16 sequentially accumulates the current data received from the current data management unit 15 as history data. The history data stored in the history data management unit 16 is sent to the information search unit 13. The facility data management unit 17 acquires facility data. The facility data acquired by the facility data management unit 17 is sent to the information search unit 13. The map data management unit 18 acquires map data. The map data acquired by the map data management unit 18 is sent to the information search unit 13.

  The information search unit 13 acquires the current data created by the current data management unit 15, the history data stored in the history data management unit 16, the facility data acquired by the facility data management unit 17, and the map data management unit 18. The facility search is executed using the map data. The search result in the information search unit 13 is sent to the result output unit 14. The result output unit 14 generates search result data based on the search result sent from the information search unit 13 and sends it to the output device 4. Thereby, the information regarding the facility searched according to the facility search instruction input from the input device 1 is presented to the user by the output device 4.

  Next, the facility search apparatus described above will be described in more detail. FIG. 2 is a block diagram showing a detailed configuration of the facility search apparatus according to Embodiment 1 of the present invention. As described above, this facility search device is composed of the input device 1, the position detection device 2, the user data detection device 3, the output device 4, and the navigation control device 5.

(1) Input Device The input device 1 includes a remote controller (hereinafter abbreviated as “remote controller”) 21, a touch panel 22, an operation switch 23, and a microphone (hereinafter abbreviated as “microphone”) 24.

  The remote controller 21 generates a signal corresponding to the key operation of the operation unit (not shown), and sends it to the instruction recognition unit 11 as search instruction data by infrared rays or radio waves. The touch panel 22 is placed on a screen of an image display device 31 to be described later, generates a signal corresponding to the touched position, and sends it to the instruction recognition unit 11 as search instruction data. The operation switch 23 is provided in a predetermined part of the facility search device, generates a signal corresponding to the switch operation, and sends it to the instruction recognition unit 11 as search instruction data. The microphone 24 is used to operate the facility search apparatus by voice, converts the spoken voice into a voice signal that is an electrical signal, and sends the voice signal to the instruction recognition unit 11 as search instruction data.

(2) Position Detection Device The position detection device 2 includes a GPS (Global Positioning System) receiver 25, a speed sensor 26, an angle sensor 27, and a position calculation unit 28. Note that the position calculation unit 28 is included in the navigation control device 5, but will be described here as a part of the position detection device 2 for convenience.

  The GPS receiver 25 receives radio waves transmitted from GPS satellites, generates GPS data, and sends the GPS data to the position calculation unit 28. The speed sensor 26 detects a vehicle speed pulse generated from the vehicle during traveling and sends it to the position calculator 28 as speed data. The angle sensor 27 detects the azimuth angle of the vehicle and sends it to the position calculation unit 28 as azimuth data.

  The position calculation unit 28 is based on the GPS data sent from the GPS receiver 25, the speed data sent from the speed sensor 26, and the azimuth data sent from the angle sensor 27 (latitude, longitude, altitude). Is calculated. The current position calculated by the position calculation unit 28 is sent to the current data management unit 15 as current position data.

(3) User Data Detection Device The user data detection device 3 includes a speed sensor 26, an angle sensor 27, and a light intensity sensor 29. The speed sensor 26 and the angle sensor 27 constituting the user data detection device 3 are the same as those constituting the position detection device 2. The luminous intensity sensor 29 detects ambient brightness and sends it to the current data management unit 15 as luminous intensity data.

  User data detected by the user data detection device 3 includes physical data such as speed data detected by the speed sensor 26, azimuth data detected by the angle sensor 27, and light intensity data detected by the light intensity sensor 29. In addition, user preference data is included. The user preference data includes information input from a setting menu prepared as a part of the navigation function, for example, information such as “I like temples”. In addition to the above, the physical data may include, for example, weather data (data indicating whether it is rain) obtained by detecting the movement of the wiper, temperature data detected by a temperature sensor, or the like.

(4) Output device The output device 4 includes an image display device 31 and an audio output device 32. The image display device 31 is composed of, for example, a liquid crystal display device, and displays a map, the current position of the host vehicle, intersection information, and the like based on the image data sent from the result output unit 14. The audio output device 32 is composed of, for example, a speaker, and outputs various messages as audio based on the audio data sent from the result output unit 14.

(5) Navigation Control Device As described above, the navigation control device 5 includes the instruction recognition unit 11, the data management unit 12, the information search unit 13, and the result output unit 14.

(5-1) Instruction Recognition Unit The instruction recognition unit 11 includes an operation signal input unit 33, a voice recognition unit 34, and a command interpretation unit 35. The operation signal input unit 33 receives a signal sent as search instruction data from the remote controller 21, a signal sent as search instruction data from the touch panel 22, and a signal sent as search instruction data from the operation switch 23. The signal is sent to the command interpreter 35 as a signal. The voice recognition unit 34 performs voice recognition based on the voice signal sent as search instruction data from the microphone 24 and sends the result of this voice recognition to the command interpretation unit 35 as an operation signal.

  The instruction interpretation unit 35 interprets the operation signal sent from the operation signal input unit 33 or the operation signal sent from the voice recognition unit 34, and generates an operation instruction signal for instructing an operation to be actually performed. . More specifically, as a result of interpreting the operation signal, the command interpretation unit 35 determines that the operation is an operation for instructing a facility search such as “What is the building on the left side” or “What is the mountain on the left side”, for example. In this case, an operation instruction signal for executing facility search is sent to the information search unit 13. On the other hand, when the command interpreter 35 determines that the operation signal is an operation other than an operation for instructing a facility search, for example, a mode switching operation or a screen setting changing operation, as a result of interpreting the operation signal, an operation such as moving the display position is performed. Is sent to the result output unit 14.

(5-2) Data Management Unit As described above, the data management unit 12 includes the current data management unit 15, the history data management unit 16, the facility data management unit 17, and the map data management unit 18.

  The current data management unit 15 predetermines the current position data calculated by the position calculation unit 28, the speed data detected by the speed sensor 26, the azimuth data detected by the angle sensor 27, and the luminous intensity data detected by the luminous intensity sensor 29. Are collected at each timing, and current data is created by attaching time information to them. As the predetermined timing, it is possible to use every predetermined time or every time a turn is reached. The current data created by the current data management unit 16 is sent to the information search unit 13, the result output unit 14, the history data management unit 16, the facility data management unit 17, and the map data management unit 18.

  The history data management unit 16 sequentially accumulates the current data sent from the current data management unit 15 as history data. The history data stored in the history data management unit 16 is sent to the information search unit 13 and the result output unit 14.

  The facility data management unit 17 and the map data management unit 18 include a storage device 36, a communication device 37, and a data read control unit 38. The storage device 36 and the communication device 37 are provided outside the navigation control device 5, but will be described as a part of the facility data management unit 17 and the map data management unit 18 for convenience.

  The storage device 36 includes, for example, a recording medium drive such as a CD (Compact Disc) and a DVD (Digital Versatile Disk), and an HDD (Hard Disk Drive). The storage device 36 stores facility data and map data. The communication device 37 is composed of a mobile phone, for example, and acquires information from the outside. The information acquired by the communication device 37 includes facility data and map data. The data read control unit 38 performs control for acquiring facility data or map data from the storage device 36 or the communication device 37. The facility data and map data acquired from the storage device 36 or the communication device 37 under the control of the data read control unit 38 are sent to the information search unit 13 and the result output unit 14.

(5-3) Information Search Unit The information search unit 13 includes a genre determination unit 39, a range determination unit 40, a direction determination unit 41, a retrograde period determination unit 42, and a search execution unit 43. The time changing means and the distance changing means of the present invention are configured by the retroactive period determining unit 42.

  The genre determination unit 39 determines a genre to be searched such as a restaurant, a convenience store, a gas station, or a school based on the operation instruction signal sent from the instruction interpretation unit 35 of the instruction recognition unit 11. The determination result by the genre determination unit 39 is notified to the search execution unit 43 as one of the search conditions. The range determination unit 40 determines a search range for searching for facilities and the like based on the operation instruction signal sent from the instruction interpretation unit 35 of the instruction recognition unit 11, for example, a range of a predetermined distance from the own vehicle position or a specified point. To do. The search range determined by the range determination unit 40 is notified to the search execution unit 43 as another search condition. The direction determination unit 41 determines a search direction such as front / rear / left / right of the vehicle position based on the operation instruction signal sent from the instruction interpretation unit 35 of the instruction recognition unit 11. The search range determined by the direction determination unit 41 is notified to the search execution unit 43 as still another search condition.

  The retroactive period determining unit 42 executes facility search based on current data from the current data management unit 15, history data from the history data management unit 16, facility data and map data from the data read control unit 38. A point to be used as a reference (hereinafter referred to as “reference point”) is determined. More specifically, the retroactive period determination unit 42 reads out history data at a time point that has been traced back from the present time by a certain time from the history data management unit 15, and has traced back by a certain distance from the point indicated by the read history data or the local point. The point history data is read from the history data management unit 15, and the point indicated by the read history data is determined as the reference point. Data representing the reference point determined by the retroactive period determination unit 42 is sent to the search execution unit 43.

  The search execution unit 43 is centered on the reference point sent from the retroactive period determination unit 42, and in accordance with the search conditions sent from the genre determination unit 39, range determination unit 40, and direction determination unit 41, the data read control unit 38. Search the facility data and map data read from. Information about the facility obtained by the search in the search execution unit 43 is sent to the map drawing unit 45 and the current position drawing unit 46, and is also sent to the sounding unit 49. The information related to the facility includes facility position information, facility information, and a character string of contents to be presented to the user.

(5-4) Result Output Unit The result output unit 14 includes an operation execution unit 44, a map drawing unit 45, a current position drawing unit 46, a guide information output unit 47, an image output unit 48, a voice generation unit 49, and a voice output unit 50. It is composed of When the operation execution unit 44 receives an operation instruction signal indicating that an operation other than the operation for instructing the facility search has been instructed from the instruction interpretation unit 35, the operation execution unit 44 activates the map drawing unit 45 and the current position drawing unit 46, Further, the voice generation unit 49 is activated depending on the contents of the operation instruction signal.

  In response to the activation from the operation execution unit 44, the map drawing unit 45 receives current data sent from the current data management unit 15, history data sent from the history data management unit 16, and data read from the data read control unit 38. Map drawing data for drawing a map for a navigation function is generated using the facility data and map data sent. The map drawing data generated by the map drawing unit 45 is sent to the image output unit 48. In response to activation from the operation execution unit 44, the current position drawing unit 46 present data sent from the current data management unit 15, history data sent from the history data management unit 16, and a data read control unit 38. The current position drawing data for drawing the current position is generated using the facility data and the map data sent from. The current position drawing data generated by the current position drawing unit 46 is sent to the image output unit 48.

  The guidance information output unit 47 uses current data sent from the current data management unit 15, history data sent from the history data management unit 16, facility data and map data sent from the data read control unit 38. Then, for example, guide information drawing data for drawing guide information such as intersection information is generated. The guidance information drawing data generated by the guidance information output unit 47 is sent to the image output unit 48. In addition, the guidance information output unit 47 instructs the voice generation unit 49 to output a voice when output by voice is necessary. The image output unit 48 generates image data in which the current position drawing data from the current position drawing unit 46 and the guidance information drawing data from the guidance information output unit 47 are superimposed on the map drawing data from the map drawing unit 45. The image is sent to the image display device 31. As a result, a map, a mark representing the vehicle position, and guidance information are displayed on the image display device 31.

  In response to the activation from the operation execution unit 44 or the instruction from the guidance information output unit 47, the voice converting unit 49 creates voice data and prepares voice data prepared in advance. The voice data created or prepared by the voice converting unit 49 is sent to the voice output unit 50. The audio output unit 50 generates an audio signal that can be reproduced by, for example, a speaker based on the audio data transmitted from the audio unit 49, and sends the audio signal to the audio output device 32. As a result, a voice message is output from the voice output device 32.

  In the facility search device according to Embodiment 1 of the present invention configured as described above, when a search instruction is input from the input device 1, the information search unit 13 of the navigation control device 5 The history data of the point determined by 42 at a point that is a certain time backward from the current time point or a point that is a certain distance from the local point is read from the history data management unit 15. The facility data read by the data read control unit 38 according to the search conditions output from the genre determination unit 39, the range determination unit 40, and the direction determination unit 41, with the point indicated by the read history data as a reference point. And search the map data to get information about the facility. Then, the information regarding the acquired facility is output to the output device 4 via the result output unit 14. Thus, for example, in the case of screen display, a point (facility) that matches the search condition is circled and marked, and “Osaka Castle. Origin is ...” is displayed. In the case of audio output, “Osaka Castle. Origin is ...” is output as audio.

  Therefore, when the information search unit 13 executes a search in response to a user's facility search instruction, as shown in FIG. 3, the search is not performed using the currently traveling point B as a reference point, but is used. A point a little before the point when the user instructs the facility search or a point a little before the point where the user instructs the search is estimated as the point A where the user exists, and this estimated point A is used as a reference. A search is performed as a point.

  As described above, according to the facility search apparatus according to Embodiment 1 of the present invention, a search is performed using a point that is presumed to exist when the user instructed the search as a reference point. It is possible to correct the deviation caused by the point movement between when the person issues a facility search instruction and when the facility search is actually performed. Therefore, the facility search accuracy can be improved, and an inexpensive facility search apparatus can be realized because it is not necessary to increase the processing speed.

Embodiment 2. FIG.
The facility search apparatus according to Embodiment 2 of the present invention is such that the time to be traced back or the distance to be traced can be changed when executing the facility search in the facility search apparatus according to Embodiment 1.

  The configuration of the facility search apparatus according to Embodiment 2 is the same as the configuration and operation of the facility search apparatus according to Embodiment 1 described above, except for the configuration and operation of the retroactive period determination unit 42. Hereinafter, the configuration and operation of the retroactive period determination unit 42 will be mainly described.

  FIG. 4 is a block diagram illustrating a configuration of the retroactive period determination unit 42 of the facility search device according to the second embodiment. The retroactive period determining unit 42 includes a retroactive period setting unit 51, a user setting retroactive period data memory 52, a default retroactive period data memory 53, an automatic determination switch control unit 54, an automatic determination switch 55, and an automatic retroactive period determination unit 56. Has been.

  The retroactive period setting unit 51 sets the retroactive period according to the input from the input device 1. For example, when the user inputs an arbitrary instruction such as “1 minute ago” or “200 meters before” from the input device 1, the retroactive period setting unit 51 calculates the retroactive period corresponding to this instruction, and the user set retroactive period The data is stored in the user setting retroactive period data memory 52 as data. The user setting retroactive period data stored in the user setting retroactive period data memory 52 is read by the automatic retroactive period determining unit 56. In the default retroactive period data memory 53, a default value of the retroactive period is stored in advance as default retroactive period data. The default retroactive period data stored in the default retroactive period data memory 53 is read out by the automatic retroactive period determining unit 56.

  The automatic determination switch controller 54 controls ON / OFF of the automatic determination switch 55 according to the input from the input device 1. The automatic determination switch 55 stores whether to use the automatically set retroactive period or the retroactive period set by the user. The setting state of the automatic determination switch 55 is referred to by the retroactive period automatic determination unit 56. In response to the inquiry from the information search unit 13, the retrograde period automatic determination unit 56 returns a retrograde period according to the setting state of the automatic determination switch 55 to the information search unit 13. Details of the retroactive period automatic determination unit 56 will be described later.

  Next, the operation of the facility search apparatus according to Embodiment 2 of the present invention configured as described above will be described with reference to the flowchart shown in FIG.

  When there is an inquiry from the information search unit 13 regarding a point to be retroactive, the retroactive period determination unit 42 first checks the state of the automatic determination switch 55 (step ST10). That is, the retroactive period automatic determination unit 56 reads the state of the automatic determination switch 55 and checks its ON / OFF. Here, when it is determined that the automatic determination switch 55 is ON, an optimal period is calculated (step ST11). In other words, the retroactive period automatic determination unit 56 determines the optimal retroactive period based on the current data sent from the current data management unit 15 and the historical data sent from the historical data management unit 16, and the determined retroactive period Is returned to the information search unit 13. The optimal retrograde period is determined by referring to speed data included in the current data, for example, and a retroactive period that goes back earlier if the speed indicated by the speed data is fast. In addition, from the user's instructions such as “2 minutes ago” and “1st previous intersection”, “Since it is a current city area, it is 17km past as 30km / h,” “Examine the previous intersection from the map and check that point. Or the like. Thereafter, the sequence proceeds to step ST15.

  If it is determined in step ST10 that the automatic determination switch 55 is OFF, then it is checked whether user set retroactive period data exists (step ST12). Here, if it is determined that the user set retroactive period data exists, the user set retroactive period data is used as the retroactive period (step ST13). That is, the retroactive period automatic determination unit 56 reads the user set retroactive period data from the user set retroactive period data memory 52 and determines the retroactive period based on the user set retroactive period data. Thereafter, the sequence proceeds to step ST15.

  If it is determined in step ST12 that the user-set retroactive period data does not exist, the default retroactive period data is used as the retroactive period (step ST14). That is, the retroactive period automatic determination unit 56 reads the default retroactive period data from the default retroactive period data memory 53 and determines the retroactive period based on the default retroactive period data. Thereafter, the sequence proceeds to step ST15.

  In step ST15, a retroactive point is calculated from the history data and the map data. That is, the retroactive period automatic determination unit 56 determines the retroactive period determined in step ST11, step ST13, or step ST14, the current data sent from the current data management unit 15, and the history data sent from the history data management unit 16. Based on the above, calculate the point in time or the point to go back. Next, the calculation result is transmitted to the information search unit 13 (step ST16). Thus, the process in the retroactive period determining unit 42 ends.

  As described above, according to the facility search device according to the second embodiment of the present invention, the time and distance that goes back can be changed according to the user's preference and the surrounding situation. This makes it easier to obtain search results along the way. In addition, since the user can arbitrarily specify the retroactive time and point in real time, the facility search accuracy can be improved.

  In the facility search device according to the second embodiment described above, the optimum retroactive period is determined based on the current data and history data. However, other parameters such as day and night, user characteristics, and the like are used. Can be used. In the case of using the parameter of day and night, it can be configured that the number of other vehicles is large during the day and the speed of retrogression is shortened because it is estimated that the speed does not come out. In addition, when using the user parameter, it is possible to increase the retroactive period because young people tend to increase speed, and to shorten the retroactive period because elderly people tend to drive safely. Further, if the user's preference (which tends to increase the speed or the tendency to issue a search instruction after passing) is known, the retroactive period can be changed to reflect this.

  Furthermore, as a parameter mentioned above, it reacts to changes in the situation in such a way that facility data is regularly updated, so that not only fixed things such as mountains and buildings but also temporal changes such as festivals, cars, and autumn leaves. Can be included. For example, if the facility data is fixed, even if you know that Nanzenji is famous for autumn leaves, you can't know what the state of autumn leaves is (especially the best). On the other hand, when the facility data is regularly updated, it is possible to obtain real-time information such as “the state of autumn leaves” depending on the update frequency. According to this configuration, the number of surrounding searchable objects is increased, and the satisfaction of the user can be improved.

It is a block diagram which shows the schematic structure of the facility search apparatus which concerns on Embodiment 1 of this invention. It is a block diagram which shows the detailed structure of the facility search apparatus which concerns on Embodiment 1 of this invention. It is a figure for demonstrating operation | movement of the facility search apparatus which concerns on Embodiment 1 of this invention. It is a block diagram which shows the structure of the retroactive period determination part of the facility search apparatus which concerns on Embodiment 2 of this invention. It is a flowchart which shows operation | movement of the retrograde period determination part of the facility search apparatus which concerns on Embodiment 2 of this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 Input device, 2 Position detection device, 3 User data detection device, 4 Output device, 5 Navigation control device, 11 Instruction recognition part, 12 Data management part, 13 Information search part, 14 Result output part, 15 Current data management part 16 history data management unit, 17 facility data management unit, 18 map data management unit, 21 remote control, 22 touch panel, 23 operation switch, 24 microphone, 25 GPS receiver, 26 speed sensor, 27 angle sensor, 28 position calculation unit, 29 light intensity sensor, 31 image display device, 32 voice output device, 33 operation signal input unit, 34 voice recognition unit, 35 command interpretation unit, 36 storage device, 37 communication device, 38 data read control unit, 39 genre determination unit, 40 Range determination unit, 41 direction determination unit, 42 retrograde period determination unit, 43 search execution unit, 44 operation execution unit, 45 map drawing unit, 46 current position drawing unit, 47 guidance information output unit, 48 image output unit, 49 voice conversion unit, 50 audio output unit, 51 retroactive period setting unit, 52 user set retroactive period data Memory, 53 default backward period data memory, 54 automatic determination switch control unit, 55 automatic determination switch, 56 automatic backward period determination unit.

Claims (6)

A history data management unit for sequentially storing information about the passing points as history data;
An instruction recognition unit for recognizing an input instruction;
When the instruction recognizing unit recognizes that a search instruction has been made, it reads out history data at a time point that is a predetermined time away from the current time from the history data management unit, and uses the point indicated by the read history data as a reference As an information search unit for searching for facility information according to a search condition included in the instruction recognized by the instruction recognition unit,
A facility search apparatus comprising: a result output unit that outputs a result searched by the information search unit. It has time changing means to change the time to go back,
The information search part
When the instruction recognizing unit recognizes that a search instruction has been made, the history data at the time point that has been changed from the current time by the time changed by the time changing unit is read from the history data managing unit, and the read history data The facility search apparatus according to claim 1, wherein facility information is searched according to a search condition included in an instruction recognized by the instruction recognition unit with reference to the indicated point. The time changing means consists of an input device for inputting the time to be traced in real time,
The information search part
When the instruction recognizing unit recognizes that a search instruction has been made, it reads out history data from the history data management unit at the time point that has been input by the input device from the present time, and indicates by the read history data. The facility search apparatus according to claim 2, wherein facility information is searched according to a search condition included in an instruction recognized by the instruction recognition unit with reference to a point to be recorded. A history data management unit for sequentially storing information about the passing points as history data;
An instruction recognition unit for recognizing an input instruction;
When the instruction recognizing unit recognizes that a search instruction has been made, the history data of a point that is a predetermined distance from the local point is read from the history data management unit, and the point indicated by the read history data is As a reference, an information search unit that searches for facility information according to a search condition included in the instruction recognized by the instruction recognition unit;
A facility search apparatus comprising: a result output unit that outputs a result searched by the information search unit. A distance changing means for changing the distance to be traced is provided.
The information search part
When the instruction recognizing unit recognizes that a search instruction has been made, the history data of the point that is back from the local point by the distance changed by the distance changing unit is read from the history data management unit, and the read history data The facility search apparatus according to claim 4, wherein facility information is searched according to a search condition included in an instruction recognized by the instruction recognition unit with respect to a point indicated by. The distance changing means consists of an input device that inputs the distance to be traced in real time,
The information search part
When the instruction recognizing unit recognizes that a search instruction has been made, the history data of the point that is back from the local point by the distance input by the input device is read from the history data management unit, and the read history data The facility search apparatus according to claim 5, wherein facility information is searched according to a search condition included in an instruction recognized by the instruction recognition unit with reference to the indicated point.

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