JP2016206041A - Route guiding device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a route guiding device which can check a present position for a small cost, even if a user moves using a route.SOLUTION: A first position obtaining portion calculates a first position which is a position of a route guiding device, on the basis of a reception signal from an artificial satellite. In a voice input portion, a voice including a getting on/off place name which is a name of a getting on/off place which an operation vehicle moving on a route passes through is inputted. and the voice is converted into a voice signal. A second position obtaining portion obtains getting on/off place name information included in the voice signal, and calculates a second position which is a position of the route guiding device on the route, on the basis of the getting on/off place name information. A position accuracy determining portion determines the level of obtaining accuracy of the first position. A display control portion displays the first position on a display portion when the obtaining information is determined as high, and displays the second position on the display portion when the obtaining accuracy is determined as low.SELECTED DRAWING: Figure 6

Description

  The present invention relates to a route guidance device.

  In Patent Document 1, a sign information transmission device is provided in a station premises. This display type information transmitting device transmits sign information for identifying a station. The passenger has a sign information receiving device. The sign information receiving device receives this sign information, and notifies the user of arrival at the target station when this sign information is the target station sign information.

  Patent documents 2 to 4 are posted as techniques related to the present application.

JP 2003-338784 A JP-A-2005-149426 JP-A-2005-321841 JP 2002-95036 A

  However, in patent document 1, the sign information transmission apparatus is provided in the station premises, and such an apparatus brings about an increase in manufacturing cost.

  Therefore, an object of the present invention is to provide a route guidance device that can confirm the current position at a low cost even when a user moves using a route.

  A route guidance device is disclosed. In one embodiment, the route guidance device includes a display unit, a first position acquisition unit, a voice input unit, a second position acquisition unit, a position accuracy determination unit, and a display control unit. The first position acquisition unit calculates a first position, which is the position of the route guidance device, based on a received signal from an artificial satellite. The voice input unit receives a voice including a name of a boarding / alighting place that is a name of a boarding / alighting place through which a traveling vehicle traveling on a route passes, and converts the voice into a voice signal. A 2nd position acquisition part acquires the boarding location name information contained in the said audio | voice signal, and calculates the 2nd position which is the position of the said route guidance apparatus on a route based on the said boarding location name information. The position accuracy determination unit determines whether the acquisition accuracy of the first position is high or low. The display control unit displays the first position on the display unit when it is determined that the acquisition accuracy is high, and displays the second position on the display unit when it is determined that the acquisition accuracy is low. .

  The current position can be confirmed at a low cost.

It is a front view which shows an example of the external appearance of a portable electronic device. It is a back view which shows an example of the general view of a portable electronic device. It is a figure which shows an example of an electrical structure of a portable electronic device roughly. It is a figure which shows an example of a structure of a route guidance part roughly. It is a figure which shows an example of the display screen of a display part roughly. It is a flowchart which shows an example of operation | movement of a route guidance part. It is a flowchart which shows an example of operation | movement of a 2nd position acquisition part. It is a figure which shows an example of time and a position. It is a figure which shows roughly an example of the relationship between time and the moving distance of a train. It is a figure which shows an example of the display screen of a display part roughly. It is a figure which shows an example of the display screen of a display part roughly. It is a flowchart which shows an example of operation | movement of a 2nd position acquisition part. It is a figure which shows an example of a structure of a route guidance part roughly. It is a figure which shows roughly an example of a structure of a timetable correction | amendment part.

  FIG. 1 shows an example of an overview viewed from the front side of the portable electronic device 100. FIG. 2 is a back view showing an example of an overview of the portable electronic device 100. The portable electronic device 100 can communicate with other electronic devices through, for example, a base station and a server, or directly. The portable electronic device 100 is, for example, a tablet, a PDA (Personal Digital Assistant), a mobile phone (including a smartphone), or a portable personal computer.

  As shown in FIGS. 1 and 2, the portable electronic device 100 includes a cover panel 2 and a case portion 3, and a substantially rectangular plate in plan view by combining the cover panel 2 and the case portion 3. A casing 4 (hereinafter also referred to as a device case) 4 is formed.

The cover panel 2 has a substantially rectangular shape in a plan view, and constitutes a part other than the peripheral part in the front part of the portable electronic device 100. The cover panel 2 is made of, for example, transparent glass or transparent acrylic resin. Alternatively, the cover panel 2 is made of sapphire, for example. Here, sapphire refers to a single crystal mainly composed of alumina (Al ₂ O ₃ ). In this specification, sapphire refers to a single crystal having an Al ₂ O ₃ purity of about 90% or more. It is preferable that the Al ₂ O ₃ purity is 99% or more in that scratches are less likely to be attached. Other examples of the material of the cover panel 2 include diamond, zirconia, titania, crystal, lithium tantalate, and aluminum oxynitride. These are also preferably single crystals having a purity of about 90% or more in that they are less likely to be scratched.

  The cover panel 2 may be a composite panel (laminated panel) having a multilayer structure including a layer made of sapphire. For example, the cover panel 2 has a two-layer structure composed of a layer made of sapphire (sapphire panel) provided on the surface of the portable electronic device 100 and a layer made of glass (glass panel) attached to the layer. It may be a composite panel. Moreover, the cover panel 2 is affixed on the layer (sapphire panel) which consists of sapphire provided in the surface of the portable electronic device 100, the layer (glass panel) which consists of glass affixed on the said layer, and the said layer Further, it may be a composite panel having a three-layer structure composed of layers made of sapphire (sapphire panel). The cover panel 2 may include a layer made of a crystalline material other than sapphire, for example, diamond, zirconia, titania, crystal, lithium tantalate, aluminum oxynitride, or the like.

  The case part 3 constitutes a peripheral part, a side part and a back part of the front part of the portable electronic device 100. The case portion 3 is made of, for example, polycarbonate resin.

  On the front surface of the cover panel 2, there is provided a display area 2a for displaying various information such as characters, symbols, figures or images. The display area 2a has a rectangular shape in plan view, for example. The peripheral part 2b surrounding the display area 2a in the cover panel 2 is black by applying a film or the like, for example, and is a non-display part where no information is displayed. A touch panel 52, which will be described later, is attached to the back surface of the cover panel 2, and the user operates the display area 2a on the front surface of the mobile electronic device 100 with a finger or the like to give various instructions to the mobile electronic device 100. Can be given. Note that the user can also give various instructions to the portable electronic device 100 by operating the display area 2a with an operator other than a finger, for example, an electrostatic touch panel pen such as a stylus pen.

  In the device case 4, for example, operation keys 5 are provided. The operation key 5 is, for example, a hardware key, and is provided at, for example, the lower end portion of the front surface of the cover panel 2.

  The touch panel 52 and the operation key 5 are an example of the input unit 50 that performs input to the portable electronic device 100. Various inputs described below may be performed using the touch panel 52 or may be performed using the operation keys 5. Below, it demonstrates mainly using the touch panel 52. FIG.

<Electrical configuration of portable electronic devices>
FIG. 5 is a block diagram showing an electrical configuration of the portable electronic device 100. A mobile electronic device 100 illustrated in FIG. 5 is, for example, a mobile phone, and includes a control unit 10, a wireless communication unit 20, a display unit 30, a first audio output unit (here, a receiver) 42, and a second audio output unit ( Here, a speaker 44, a voice input unit (here, a microphone) 46, an input unit 50, an imaging unit 60, and a first position acquisition unit 70 are provided. These components provided in the portable electronic device 100 are housed in the device case 4.

  The control unit 10 includes, for example, a CPU (Central Processing Unit) 101, a DSP (Digital Signal Processor) 102, a storage unit 103, and the like, and controls other components of the mobile electronic device 100, whereby the mobile electronic device 100. To manage the operation of the system. The storage unit 103 includes a ROM (Read Only Memory), a RAM (Random Access Memory), and the like. The storage unit 103 includes an operation of the mobile electronic device 100, specifically, a main program that is a control program for controlling each component such as the wireless communication unit 20 and the display unit 30 included in the mobile electronic device 100, and a plurality of programs Application programs (hereinafter simply referred to as “applications”) and the like are stored. Various functions of the control unit 10 are realized by the CPU 101 and the DSP 102 executing various programs in the storage unit 103. In the illustration of FIG. 3, one CPU 101 and one DSP 102 are shown, but a plurality of these may be provided. These may cooperate with each other to realize various functions. In the illustration of FIG. 3, the storage unit 103 is shown inside the control unit 10, but may be provided outside the control unit 10. In other words, the storage unit 103 may be separate from the control unit 10. Further, part or all of the functions of the control unit 10 may be realized by hardware.

  The wireless communication unit 20 has an antenna 21. The wireless communication unit 20 receives a signal from another display device or a communication device such as a web server connected to the Internet by an antenna 21 via a base station or the like. The radio communication unit 20 performs amplification processing and down-conversion on the received signal and outputs the result to the control unit 10. The control unit 10 performs a demodulation process or the like on the input reception signal. The wireless communication unit 20 performs up-conversion and amplification processing on the transmission signal generated by the control unit 10 and wirelessly transmits the processed transmission signal from the antenna 21. A transmission signal from the antenna 21 is received by another display device or a communication device connected to the Internet through a base station or the like.

  The display unit 30 is, for example, a liquid crystal display panel or an organic EL panel. The display unit 30 displays various types of information such as characters, symbols, figures, and images under the control of the control unit 10. Information displayed on the display unit 30 is displayed in the display area 2 a on the front surface of the cover panel 2. Therefore, it can be said that the display part 30 is displaying on the display area 2a.

  The input unit 50 is operated by the user and inputs various instructions and the like to the control unit 10. For example, the input unit 50 includes a touch panel 52 and a key operation unit 54.

  The touch panel 52 detects an operation by an operator such as an operation finger on the display area 2 a of the cover panel 2. The touch panel 52 is, for example, a projected capacitive touch panel, and is attached to the back surface of the cover panel 2. When the user operates the display area 2 a of the cover panel 2 with an operator such as an operating finger, a signal corresponding to the operation is input from the touch panel 52 to the control unit 10. Based on the signal from the touch panel 52, the control unit 10 specifies the content of the operation performed on the display area 2a, and performs processing according to the content. The touch panel 52 may be a pressure-sensitive touch panel.

  The key operation unit 54 detects a user's pressing operation on each operation key 5. The key operation unit 54 detects, for each operation key 5, whether or not the operation key 5 is pressed. When the operation key 5 is not pressed, the key operation unit 54 outputs a non-operation signal indicating that the operation key 5 is not operated to the control unit 10. When the operation key 5 is pressed, the key operation unit 54 outputs an operation signal indicating that the operation key 5 has been operated to the control unit 10. Thereby, the control part 10 can judge whether the said operation key 5 is operated about each operation key 5. FIG.

  The first audio output unit 42 is, for example, a receiver. The 1st audio | voice output part 42 outputs an incoming call sound, for example, is comprised with the dynamic speaker. The first sound output unit 42 converts the electrical sound signal from the control unit 10 into sound and outputs the sound. The sound output from the first sound output unit 42 is output to the outside from the receiver hole 80 a provided on the front surface of the portable electronic device 100. The volume of the sound output from the receiver hole 80a is smaller than the volume of the sound output from the second sound output unit 44 via the speaker hole 34a.

  A piezoelectric vibration element may be provided instead of the receiver. The piezoelectric vibration element is controlled by the control unit 10 and vibrates based on the audio signal. The piezoelectric vibration element is provided on the back surface of the cover panel 2, for example, and vibrates the cover panel 2 by its own vibration based on the audio signal. Thereby, the vibration of the cover panel 2 is transmitted to the user's ear as sound. In this case, the receiver hole 80a is not necessary.

  The second audio output unit 44 is a speaker, for example, a dynamic speaker. The second audio output unit 44 converts the electrical sound signal from the control unit 10 into sound and outputs the sound. The sound output from the second audio output unit 44 is output to the outside from the speaker hole 34 a provided on the back surface of the portable electronic device 100. The volume of the sound output from the speaker hole 34 a is adjusted so that the sound can be heard even at a location away from the portable electronic device 100. That is, the volume of the second audio output unit (speaker) 44 is larger than the volume of the first audio output unit (receiver or piezoelectric vibration element) 42.

  The audio input unit 46 is, for example, a microphone, converts sound input from the outside of the portable electronic device 100 into an electric sound signal, and outputs the electric sound signal to the control unit 10. Sound from the outside of the portable electronic device 100 is taken into the inside of the portable electronic device 100 through a microphone hole provided on the front surface of the cover panel 2 and input to the voice input unit 46.

  The imaging unit 60 includes, for example, a first imaging unit 62 and a second imaging unit 64. The first imaging unit 62 includes an imaging lens 6 a and an imaging element, and captures still images and moving images based on control by the control unit 10. As shown in FIG. 1, since the imaging lens 6a is provided on the front surface of the portable electronic device 100, it is possible to image an object existing on the front surface side (the cover panel 2 side) of the portable electronic device 100. It is.

  The second imaging unit 64 includes an imaging lens 7 a and an imaging element, and captures still images and moving images based on control by the control unit 10. As shown in FIG. 2, since the imaging lens 7 a is provided on the back surface of the portable electronic device 100, it is possible to image an object present on the back surface side of the portable electronic device 100.

  The first position acquisition unit 70 can acquire its current position. Since the first position acquisition unit 70 is housed in the mobile electronic device 100, it can also be described that the current position is the position of the mobile electronic device 100. The first position acquisition unit 70 is a device that uses, for example, a GPS (Global Positioning System), and is related to a reception signal from an artificial satellite (for example, information on the position of the artificial satellite and a time at which the signal is transmitted via the wireless communication unit 20. Information) and the current position is calculated based on the received signal. The current position information indicating the current position includes latitude information and longitude information.

<Route guide>
FIG. 4 schematically shows an example of the configuration of the route guide unit 110 mounted on the portable electronic device 100. In the example of FIG. 4, the route guide unit 110 includes, for example, an input unit 50, a route generation unit 111, a position detection unit 120, a display control unit 115, and a display unit 30.

  The route generation unit 111 is realized as one function of the control unit 10, for example, and map information is input to the route generation unit 111.

  The map information includes road data composed of link data and node data, for example. The node data is data indicating points where each road intersects, branches, and merges, and the link data is data that indicates a section of the road connecting the nodes. The link data includes an identification number for identifying a road in each section, a road length indicating the length of the road in each section, the coordinates of the start point and end point of each section (for example, latitude and longitude), and the type of road (for example, a national road) ), The number of lanes, the presence / absence of right / left turn lanes, and the number of lanes. In addition, the link data includes information on altitudes at a plurality of points included in each section or information on inclinations at a plurality of points included in each section. The node data includes information such as an identification number for identifying the node, the coordinates of the node, and the identification number of the road connected to the node.

  The map information also includes route data. For example, the route data includes route information and boarding / alighting location information. The getting-on / off location information is information indicating a plurality of getting-on / off locations included in the route, and the route information is information indicating a route connecting the getting-on / off locations. For example, a train or a bus is used as the operating vehicle moving on the route. When the operating vehicle is a train, the getting-on / off location is a station, and when the operating vehicle is a bus, the getting-on / off location is a bus stop. The getting-on / off location information includes identification information (for example, station name information) and position information (for example, coordinates) for identifying the getting-on / off location.

  The map information may be stored in advance in a storage unit (for example, the storage unit 103), for example. Alternatively, the wireless communication unit 20 may receive the map information from an external device (for example, a server, a base station, or a relay device).

  The route generation unit 111 can generate travel route information based on the map information. The travel route information is information indicating a travel route to the destination. The route generation unit 111 also receives start point information and destination information. As the start point, for example, the current position detected by the first position acquisition unit 70 when the travel route information is generated can be employed. The destination is input by the user via the input unit 50, for example.

  The route generation unit 111 generates travel route information indicating a travel route from the start point to the destination based on the start point information, the destination information, and the map information. This travel route information includes not only road data but also route data.

  The display control unit 115 is realized as one function of the control unit 10, for example. The display control unit 115 can receive the travel route information from the route generation unit 111 and can display it on the display unit 30.

  FIG. 5 shows an example of a display screen displayed on the display unit 30. In the illustration of FIG. 5, the surrounding map is displayed along with the travel route R1 from the start point S1 to the destination G1. A route L1 including four stations A1 to A4 is also displayed on the surrounding map. This route L1 is, for example, a subway route. The route L1 has a route in the direction from the station A1 to the station A4 via the stations A2 and A3 in this order, and a route in the direction from the station A4 to the station A1 via the stations A3 and A2 in this order. And routes.

  In the illustration of FIG. 5, the travel route R1 includes a road route R11 from the start point S1 to the station A2, a route route R12 from the station A2 to the station A4, and a road route R13 from the station A4 to the destination G1. It is out. The route R12 is a part of the route L1 in the direction from the station A1 to the station A4.

  The user can check the moving route R1 to the destination G1 by visually recognizing the display unit 30. Therefore, the user easily arrives at the destination G1.

  Referring to FIG. 4 again, the control unit 10 forms the position detection unit 120 together with the first position acquisition unit 70 and the voice input unit 46. The configuration of the position detection unit 120 will be described in detail later, but will be outlined first. As illustrated in FIG. 4, the position detection unit 120 includes a voice input unit 46, a first position acquisition unit 70, a second position acquisition unit 72, and a position accuracy determination unit 121. The second position acquisition unit 72 includes, for example, a voice recognition unit 122, a train route specifying unit 123, and a position estimation unit 124. For example, as shown in FIG. 4, the position accuracy determination unit 121, the voice recognition unit 122, the train route identification unit 123, and the position estimation unit 124 may be realized as a function of the control unit 10.

  For example, the position detection unit 120 can detect the current position every predetermined time, and update the position information using the current position. Then, the updated position information is output to the display control unit 115. The display control unit 115 can display position information on the display unit 30. In the example of FIG. 5, this position information is indicated by a graphic P1. Thereby, the user can move to the destination G1 while confirming the moving route R1 and his / her position on the display unit 30. Therefore, the user easily arrives at the destination G1. The display control unit 115 may also be realized as a function of the control unit 10.

  The position detection unit 120 can detect the current position using two methods described later. As a first method, the first position acquisition unit 70 acquires the current position based on a received signal from an artificial satellite. The received signal from the artificial satellite includes, for example, the following two pieces of information, that is, the transmission time at which the artificial satellite transmits the signal and the position of the artificial satellite. For example, the first position acquisition unit 70 calculates the difference between the transmission time and the reception time of the artificial satellite. Since this difference depends on the linear distance between the artificial satellite and the portable electronic device 100, the linear distance is obtained from the difference. Therefore, the portable electronic device 100 is located on any of the spheres having the straight line distance as a radius around the position of the artificial satellite.

  Therefore, if the reception signals from the three artificial satellites can be obtained, one position of the portable electronic device 100 is obtained. Actually, in order to correct the error of the timing circuit between the artificial satellite and the portable electronic device 100, the reception accuracy from the more than three artificial satellites is used to improve the current position acquisition accuracy. Yes.

  By the way, for example, when the user uses the above-described route, the acquisition accuracy of the current position based on the received signal may be lowered. For example, when getting on a running vehicle, the reception signal may be blocked by the ceiling of the running vehicle, and the acquisition accuracy may be reduced. In addition, when using a traveling vehicle that moves underground, the current position cannot be acquired with appropriate acquisition accuracy.

  Therefore, when the current position cannot be acquired with appropriate acquisition accuracy, the position detection unit 120 detects the current position by a second method described later. Here, in describing the second method, first, a method for determining the level of acquisition accuracy of the current position (hereinafter also referred to as the first position) by the first position acquisition unit 70 will be described. This determination can be performed by the position accuracy determination unit 112.

  When the number of artificial satellites that can receive the received signal is small, the accuracy of acquiring the current position is low as described above. Therefore, as the information indicating the acquisition accuracy of the current position, for example, information on the number of artificial satellites that can properly receive the received signal can be employed.

  Whether or not the reception signal has been properly received can be determined based on, for example, the reception level (power) of the reception signal. That is, when the reception level is higher than the predetermined value, it can be determined that the reception signal has been properly received. Alternatively, it may be determined that the reception signal has been properly received by analyzing the reception signal and appropriately determining the transmission time and the position of the artificial satellite.

  Then, it is determined for each artificial satellite whether or not the received signal has been properly received from the artificial satellite, and the number of artificial satellites that have received the received signal appropriately is detected. When the number is smaller than a predetermined value, it is determined that the current position acquisition accuracy is lower than a predetermined accuracy reference value. The accuracy reference value is set in advance, for example, and stored in a storage unit (for example, the storage unit 103).

  Alternatively, it is estimated that the current position is acquired with low accuracy when the average value of the reception level of the received signal from the artificial satellite is smaller than the reference value more simply without determining the number of artificial satellites. May be. That is, the average value of the reception level of the reception signal can be adopted as the accuracy information.

  In addition, the first position acquisition unit 70 may acquire the current position based on not only the received signal of the artificial satellite but also wireless communication with a relay device (for example, an access point) existing in the wireless communication network. A wireless communication network includes a plurality of relay devices, and each relay device has a range in which wireless communication is possible. Therefore, the range in which the mobile electronic device 100 exists can be specified by specifying the relay device with which the mobile electronic device 100 can perform wireless communication. For example, when the portable electronic device 100 can wirelessly communicate with a plurality of relay devices, the portable electronic device 100 exists in a range where the communicable ranges of the plurality of relay devices overlap.

  Furthermore, when the number of artificial satellites is small, the first position acquisition unit 70 improves the acquisition accuracy of the current position by using both the received signal from the artificial satellite and the range specified by the relay device. May be.

  In some cases, the current position can be acquired with sufficient acquisition accuracy by such processing. In this case, when the number of artificial satellites is smaller than a predetermined value and the reception signal cannot be properly received with the relay device, it may be estimated that the current position acquisition accuracy is lowered. In this case, as the accuracy information, it is possible to employ the number of artificial satellites that have appropriately received the received signal and the reception level of the received signal from the relay device.

  Note that the range specified by the relay device is less accurate than the acquisition of the current position based on an artificial satellite. Therefore, even when the current position is acquired using a relay device and an artificial satellite, the acquisition accuracy can be judged using the received signal from the artificial satellite without using the received signal from the relay device. Good.

  When the position accuracy determination unit 121 determines that the current position acquisition accuracy is lower than the accuracy reference value, the second position acquisition unit 72 can acquire the current position by the second method. As a second method, a current position (hereinafter also referred to as a second position) is acquired using a voice announcement about a route. This will be described in detail below.

  For example, inside a train, the station name is announced by voice. Specifically, the station where the train stops next (hereinafter also referred to as the next stop station) is announced. This announcement may be made when the train approaches the next stop station, or even immediately after the train departs. At the former timing, for example, it is announced that the station will soon arrive at the next stop station, and at the latter timing, for example, the next stop station is simply announced. For example, “Next station ●● station” sounds.

  Therefore, the position detection unit 120 analyzes this voice and specifies the current position based on the station name included in the voice. This voice is input to the voice input unit 46 and converted into a voice signal by the voice input unit 46. The voice recognition unit 122 recognizes a word, a word, or a sentence (that is, the voice content) indicated by the voice signal. As an audio recognition method, any method may be adopted. For example, the audio signal is matched with the audio feature data stored in advance in the storage unit (for example, the storage unit 103), and the audio signal indicates The content of the voice may be recognized. An acoustic model is used as the feature data. This acoustic model includes data indicating the frequency characteristics of sounds representing each character collected in a plurality of environments and a plurality of voices. Or you may employ | adopt a language model further. This language model includes data indicating the frequency of character strings. Speaking in English, for example, it is data indicating that “to” is frequently used after “go”. Thereby, the accuracy of voice recognition can be improved.

  Hereinafter, information indicating the content of the voice recognized by the voice recognition unit 122 is also referred to as voice content information. The voice recognition unit 122 outputs the voice content information to the train route specifying unit 123. The train route specifying unit 123 can first determine whether or not the station name information is included in the audio content information. This determination can be made as follows, for example. First, a plurality of station name information is stored in advance in a storage unit (for example, the storage unit 103) as registered station name information. Then, the registered station name information is searched for the audio content information. If the registered station name information is included in the audio content information, the registered station name information is adopted as the station name information. Thereby, station name information is acquired.

  The train route specifying unit 123 can specify the train route used by the user based on the acquired station name information and route data. Although a specific method for specifying a train route will be described later in detail, for example, if two station names can be obtained, a train route passing through those stations can be specified. Hereinafter, information indicating the train route is also referred to as train route information. The train route information includes information on the names and positions of the stations included in the route, and the positions of routes connecting these stations.

  The position estimation unit 124 calculates the current position based on the train route information and the station name information. For example, if the station name of the next stop station included in the voice announcement in the train can be obtained, it can be determined that the user is located between the next stop station and the previous stop station at that time. Thus, for example, the position estimation unit 124 may specify a point that is a first predetermined distance before the next stop station or a point that is a second predetermined distance ahead of the previous stop station as the second position on the train route. Good. However, in order to improve the accuracy of the second position, various devices may be performed as described in detail later.

  Since the display control unit 115 displays the position information on the display unit 30, the first position is displayed on the display unit 30 when the acquisition accuracy is higher than the accuracy reference value, and the second position when the acquisition accuracy is lower than the accuracy reference value. Will be displayed on the display unit 30.

<Conditions for executing the second method>
In the above-described example, when the first position acquisition accuracy by the first position acquisition unit 70 is low, the second position acquisition unit 72 performs the second method. However, even if the user does not use the route L1, the acquisition accuracy may be lowered simply by entering the building. In this case, since the voice announcement including the station name information does not flow, it is not necessary to execute the second method. Therefore, the following condition may be added to the execution condition of the second method. That is, the second method may be executed when the first position obtained immediately before the acquisition accuracy is lowered is located in the vicinity of the route L1. According to this, when there is a high possibility that the user is using the route L1, the second method is executed. Therefore, unnecessary execution of the second technique can be avoided. This contributes to reduction of power consumption.

<Example of specific operation of the route guide>
In the example of FIG. 4, the position detection unit 120 also includes a route vicinity determination unit 125 to realize this. FIG. 6 is a flowchart illustrating an example of the operation of the route guide unit 110. First, in step ST1, the first position acquisition unit 70 receives a reception signal from an artificial satellite, and acquires the current position (first position) based on the received signal. Here, it is assumed that the first position has been acquired with appropriate accuracy. The route generation unit 111 grasps this first position as the start point S1.

  Next, in step ST2, the user inputs the destination G1. For example, the display control unit 115 displays a destination setting screen, and the user inputs a destination G1 by operating a button displayed on the screen. This operation is detected by the touch panel 52, and the information is input to the route generation unit 111. Thereby, the route generation unit 111 obtains the start point S1 and the destination G1.

  Next, in step ST3, the route generation unit 111 generates travel route information indicating the travel route R1 connecting the start point S1 and the destination G1, based on the map information. For example, the travel route R1 includes road routes R11 and R13 and a route route R12 as described above. The travel route information is output to the display control unit 115, and the display control unit 115 displays the travel route R1 on the display unit 30 based on this.

  Thereby, the user can confirm the movement route R1 to the destination G1. Then, the user starts moving to the destination G1 along the moving route R1.

  Next, in step ST4, the first position acquisition unit 70 acquires the first position based on the received signal from the artificial satellite, and the position accuracy determination unit 112 determines whether the acquisition accuracy is higher than a predetermined accuracy reference value. Judge whether or not. If it is determined that the acquisition accuracy is higher than the accuracy reference value, in step ST5, the position detection unit 120 updates the position information using the first position acquired by the first position acquisition unit 70. Specifically, the first position acquired by the first position acquisition unit 70 is adopted as the position information.

  When it is determined that the acquisition accuracy is lower than the accuracy reference value, in step ST6, it is determined whether or not the previous position information (that is, the position information before update) is in the use section of the operating vehicle. More specifically, for example, a distance between the previous position information and the route L1 is calculated, and it is determined whether or not the distance is larger than a predetermined first distance reference value. In addition, this 1st distance reference value is preset, for example, and is memorize | stored in the memory | storage part (for example, memory | storage part 103). When the distance is larger than the first distance reference value, step ST4 is executed again.

  For example, when the user enters a predetermined building, the reception signal from the artificial satellite is blocked by the ceiling of the building, so a negative determination is made in step ST4. However, if this building is away from the line L1, a negative determination is also made in step ST6. In such a case, steps ST4 and ST6 are repeatedly executed until the user goes out of the building and the reception signal from the artificial satellite is properly received. Therefore, in this case, the update of the position information is interrupted.

  Although not shown in FIG. 6, if a negative determination is made in step ST6, as described above, the current position is calculated using at least one of the base station and the relay device, and this is calculated. The position information may be updated using According to this, it is possible to avoid the interruption of updating the position information.

  On the other hand, for example, when the user enters the basement at the station A2, a negative determination is made in step ST4, and a positive determination is made in step ST6.

  When an affirmative determination is made in step ST6, in step ST7, the second position acquisition unit 72 acquires the current position (second position) based on the voice including the station name, and determines the second position. To update the location information. A specific method will be described later.

  That is, when the user is outdoors, the position information is updated at the first position acquired by the first position acquisition unit 70, and when the user is using the route L1, the second position acquisition unit 72 acquires the first information. The position information is updated at two positions. Specifically, this second position is adopted as the position information.

  After step ST5 or step ST7, the position detection unit 120 determines whether or not the user has arrived at the destination G1. Specifically, it is determined whether or not the distance between the current position indicated by the updated position information and the destination G1 is shorter than a predetermined second distance reference value. The second distance reference value is set in advance, for example, and stored in the storage unit (for example, the storage unit 103). If it is determined that the distance is longer than the second distance reference value, step ST4 is executed again. That is, if it is determined that the user has not yet reached the destination G1, step ST4 is executed again.

  On the other hand, if it is determined that the distance is shorter than the second distance reference value, in step ST9, the position detection unit 120 notifies the user that it has arrived at the destination G1. For example, the display control unit 115 displays on the display unit 30 that the destination control unit 115 has arrived at the destination G1. This notification is not limited to the display by the display unit 30, but may be performed by light, sound, or vibration.

<Update of location information based on voice>
FIG. 7 is a flowchart showing a specific example of the operation of the second position acquisition unit 72. In the example of FIG. 7, for example, in step ST <b> 71, the display control unit 115 displays a screen (not shown) that prompts the user to obtain voice on the display unit 30. For example, characters or figures for prompting the acquisition of voice are displayed. As a result, the user can understand that the mobile electronic device 100 is about to obtain sound, and can hold the mobile electronic device 100 in a posture suitable for obtaining sound. For example, the user holds the portable electronic device 100 so as not to block the microphone hole of the voice input unit 46 or holds the portable electronic device 100 with the voice input unit 46 facing the sound source.

  Note that step ST71 is not always necessary, and step ST71 may not be executed.

  Next, in step ST72, it is determined whether or not a voice including a station name is input. A specific operation will be described. First, a voice is input to the voice input unit 46, and the voice is converted into a voice signal. The voice recognition unit 122 recognizes the voice content based on the voice signal, and outputs the result as voice content information. And the train route specific | specification part 123 judges whether station name information is contained in audio | voice content information. When it is determined that the station name information is included, a positive determination is made in step ST72.

  For example, when the user gets on the train from the platform of the station A2, a voice announcement about the next stop station A3 flows in the train. The voice recognition unit 122 recognizes the contents of this voice announcement. Then, the train route specifying unit 123 determines that the station name of the next stop station A3 is included in the voice announcement.

  If it is determined that the station name information is included, in step ST73, the train route specifying unit 123 acquires the station name information from the voice information. As a specific operation, the registered station name information is searched for the audio content information as described above, and the searched registered station name information is adopted as the station name information.

  Next, in step ST74, the train route specifying unit 123 specifies the train route based on the station name information and the route data. For example, the train route specifying unit 123 may specify the train route by acquiring two station names as described above, but here, as an example, the train route specifying unit 123 also uses the travel route information generated by the route generating unit 111 to train Identify the route. This travel route information includes route data (route route R12). Specifically, it is determined whether or not a station (for example, station A3) indicated by the station name information is included in the route route R12 based on the station name information and the travel route information, and the station is included in the route route R12. In addition, the route including the route route R12 is specified as the train route. That is, the route L1 in the direction from the station A2 to the station A4 is specified as a train route, and this train route information is output to the position estimation unit 124.

  Next, in step ST75, the position estimation unit 124 updates the position information based on the train route information and the acquired station name information. For example, when the station name indicates the station A3, on the route L1 in the direction from the station A2 to the station A4, a position that is a first predetermined distance ahead of the station A3 or a position that is a second predetermined distance ahead of the station A2. The position information may be updated using.

  Or you may use the present time and the timetable of a train route. The current time is measured by an arbitrary timer (for example, a timer circuit), and is output to the position estimating unit 124 as current time information. The timetable information indicating the timetable of the train route includes information on the arrival time at which each train traveling on the train route arrives at each station. The timetable information may be stored in advance in a storage unit (such as the storage unit 103), for example. Alternatively, the position estimation unit 124 may receive from an external device (for example, a server) via the wireless communication unit 20.

  Based on the station name information, the current time information, and the timetable information of the identified train route, it is estimated which position the train on which the user is traveling travels. For example, as shown in FIG. 8, at the timing when the station name information of the next stop station A3 is acquired, the current time t1 is located between the station A2 and the station A3. Therefore, the user is on the train that arrives at the station A2 at the arrival time t22 before the current time t1 and arrives at the station A3 at the arrival time t23 after the current time t1. Such arrival times t22 and t23 can be grasped from the timetable information. The current position can be estimated from the relationship between the arrival times t22 and t23 and the current time t1.

  For example, when a train departs from a station, as shown in FIG. 9, the travel distance of the train gradually increases with acceleration, and when the speed reaches a predetermined value, for example, the train travels at a substantially constant speed and the travel distance becomes time. Increases substantially in proportion to the next stop station, and decelerates to increase the travel distance relatively slowly. Therefore, if the change with respect to time of this movement distance is previously memorize | stored in a memory | storage part (for example, memory | storage part 103 etc.), a 2nd position can be estimated with higher precision based on the present time t1.

  Alternatively, when calculating the second position more simply, the travel distance D1 from the station A2 on the route L1 in the direction from the station A2 to the station A4 is changed to the distance D2 on the route L1 between the stations A2 and A3. Based on this, the following formula may be used.

  D1 = D2 · (t1−t21) / (t22−t21) (1).

  Then, the position estimation unit 124 calculates a point ahead of the station A2 by the movement distance D1 as the second position.

  As described above, the position estimation unit 124 calculates the second position, and updates the position information using the second position. That is, this second position is adopted as the position information.

  On the other hand, when the voice including the station name is not input in step ST72, the position estimating unit 124 determines whether or not the train route has already been specified in step ST76. If the train route has not yet been specified, step ST71 is executed again to wait for voice input. If the train route has already been specified, step ST75 is executed, and the position information is updated as described above based on the current time information and the timetable information. That is, when a voice including a station name is not newly input, it is considered that the train is still running between the stations A2 and A3, and the position information is updated.

  On the other hand, if the voice including the station name of the next stop station A4 is input after leaving the station A3 (step ST72), the position information is updated to the position between the stations A3 and A4 through steps ST73 to ST75. The Then, the station name indicating the next stop station of the station A4 is input by voice, or until the user finishes using the route L1 and goes outside to update the location information based on the received signal. The location information is updated based on the current time and the timetable (steps ST72, ST76, ST75).

  As described above, when the acquisition accuracy of the first position by the first position acquisition unit 70 is reduced due to the use of the operating vehicle (here, the subway), the second position is calculated based on the voice announcement, and the second position is calculated. Update location information with. Therefore, the second position is displayed on the display unit 30. Thereby, even when the first position acquisition unit 70 does not function effectively, the user can check his / her position on the display unit 30.

  Conventionally, a sound generation device that generates a sound announcement has been provided in an operating vehicle traveling on a route, and is not newly provided to implement the present embodiment. Therefore, the cost for introducing this embodiment can be small.

  Moreover, in the present embodiment, since the station name is acquired based on the voice announcement, the position information is appropriately updated even if, for example, the user mistakes or misses the train. For example, consider a case where the user takes a train in the opposite direction from the train that the user should ride from station A2. In this case, for example, the station name of the next stop station A1 is announced inside the train leaving the station A2. The train route specifying unit 123 specifies the route L1 in the direction from the station A2 to the station A1 as a train route based on the station name. That is, the route that travels in the opposite direction to the route route R12 is specified as the train route.

  Then, the position estimation unit 124 calculates the second position between the station A2 and the station A1 on the route L1 based on the station name of the next stop station A1, and uses this second position. Update location information.

  Thereby, as shown in FIG. 10, the figure P1 as a present position will be displayed on the display part 30 between station A1, A2. Therefore, the user can confirm on the display unit 30 that he / she got on the train by mistake. Therefore, the user can appropriately operate to return to the route route R12. For example, you can get off at station A1 and take a train in the opposite direction.

  In addition, when the user continues to get on the train without getting off at the station A4, the name of the station where the train stops next to the station A4 is announced inside the train that has left the station A4. The train route specifying unit 123 continues to specify the route L1 in the direction from the station A2 to the station A4 as a train route. Then, the position estimation unit 124 calculates the current position based on the station name information, the current time, and the timetable information. Thereby, the position between the station A4 and the next station is displayed on the display unit 30 as the current position. Therefore, the user can confirm on the display unit 30 that he / she has been on the train by mistake. Therefore, the user can appropriately operate to return to the station A4. For example, you can get off at the station next to station A4 and get on the opposite train.

<Update route>
When the current position indicated by the position information deviates from the movement route R1, the route generation unit 111 may recalculate the movement route from the position to the destination G1. For example, when the first position acquired by the first position acquisition unit 70 with high acquisition accuracy deviates from the movement route R1, the route generation unit 111 recalculates the route from the position to the destination G1.

  Further, even when the second position acquired by the second position acquisition unit 72 is located at a point on the route other than the route route R12, the travel route from the position to the destination G1 can be recalculated. Good. However, in this case, the user always passes the station (next stop station) where the train stops next on the route. Therefore, the route generation unit 111 may adopt a route consisting of a route route from the next stop station to the getting-off station A4 and a road route R13 from the getting-off station A4 to the destination G1 as the moving route. That is, the route from the next stop station to the destination G1 may be recalculated without considering the route from the second position to the next stop station. According to this, a movement route can be easily calculated.

<Method 1 of identifying train route>
Here, a method for specifying a train route is described. If the station names of two stations are acquired as described above, the train route can be specified based on the route data. Therefore, one of them may be acquired based on the first position by the first position acquisition unit 70 and the other may be acquired based on voice. More specifically, when the distance between the first position immediately before the acquisition accuracy by the first position acquisition unit 70 is lower than the accuracy reference value and the station is smaller than the reference value, the user has arrived at the station. Judge. Thereby, one station can be acquired. Subsequently, when the user gets on the train from the station, the next stop station is announced in the train. Thereby, the other station can be acquired based on the voice announcement in the train.

  Alternatively, both of these two stations may be acquired by voice. For example, an audio announcement about the next stop station A3 flows in the train while traveling from the station A2 to the station A3, and an audio announcement about the next stop station A4 occurs on the train while traveling from the station A3 to the station A4. Flowing. With these voice announcements, the station names of the stations A3 and A4 can be acquired. Therefore, the train route may be specified based on the station names and route data of the stations A3 and A4.

<Train route identification method 2>
In the station platform, the final arrival station of the train arriving at the platform may be announced. For example, the voice “A train on the ●● line arrives on the ○ line” is announced. It can be considered that the user is likely to get on the train. Therefore, for example, when the word “●● line” is included in the audio content information, the train route may be specified based on the station name information and route data of the last arrival station indicated by “●●”. .

  Alternatively, the main station may be announced along with the final arrival station in the voice announcement. For example, a voice message “A train on the ●● line will arrive via line ▲▲” will be announced. Therefore, when the voice announcement includes the word “▲▲ via, ●● line”, the station name “▲▲” of the transit station is obtained, and the station name “●●” of the final arrival station is obtained. Also good. And a train route may be specified based on these station name information and route data. According to this, even when there are a plurality of routes arriving at the final arrival station, the train route can be correctly specified.

  Alternatively, at least a station that is grasped based on the first position of the first position acquisition unit 70, a station name that is acquired by voice announcement at the home, and a station name of the next stop station that is acquired by voice announcement inside the train Either may be used to specify the train route. For example, the station name of the last arrival station acquired by voice announcement at the home and the station name of the next stop station inside the train may be used.

  Alternatively, the final arrival station or even a major station may be announced inside the train. Based on this voice, the station name of the final arrival station or the station name of a further main station may be acquired, and the train route may be specified based on these.

<Station name acquisition method 1>
For example, identification information other than the station name may be set for each station. For example, the identification information may be configured using at least one of alphabets and numbers. More specifically, for example, information obtained by connecting the first alphabet of a route name and a number may be adopted as identification information. Such identification information may be announced by voice. Therefore, the station may be specified based on the identification information.

  For example, the related information between the identification information and the station name is stored in advance in a storage unit (for example, the storage unit 103), for example. And the train route specific | specification part 123 judges whether the identification information is contained in the audio | voice content information output from the audio | voice recognition part 122, and when the identification information is contained, the station name corresponding to identification information is included. May be specified based on the related information.

<Station name acquisition method 2>
For example, a station-specific sound (for example, music) unique to the station may flow on the station platform. That is, a sound output device that outputs a station-specific sound may be installed at the station. Therefore, the station may be specified based on the station specific sound.

  For example, information related to a station-specific sound and a station name may be stored in advance in, for example, a storage unit (for example, the storage unit 103), and an audio signal of the station-specific sound may be stored. Then, the train route specifying unit 123 determines whether or not the sound signal output from the sound input unit 46 includes a sound signal of a station specific sound, and when the sound signal of a station specific sound is included In addition, the station name corresponding to the station specific sound may be specified based on the related information.

<Get off at the boarding location>
The route to the destination may include multiple route routes. In the illustration of FIG. 11, the travel route R1 includes a road route R11 from the start point S1 to the station A2, a route route R121 from the station A2 to the station A3 on the route L1, and a route from the station A3 to the station A31 on the route L2. A route R122 and a road route R131 from the station A31 to the destination G1 are included. In this travel route R1, the user gets on the train that goes to the station A3 at the station A2 on the route L1, gets off at the station A3, and changes to the train that goes to the station A4 on the route L2. Then, the user gets off at the station A4 and moves to the destination G1.

  Information on the transfer station A3 and the getting-off station A4 is included in the travel route information. Since the user gets off at the transfer station, the following description will be given by including the transfer station in the concept of a drop-off station.

  Thus, when the disembarking station is included in the travel route, the second position acquisition unit 72 may update the position information as follows. That is, when the distance between the second position calculated by the second position acquisition unit 72 and the getting-off station is smaller than a predetermined fourth distance reference value, the getting-off of the position information until the following condition is satisfied. Keep at the station. The fourth distance reference value is set in advance, for example, and stored in the storage unit (for example, the storage unit 103).

  The next condition is that the voice including the station name is input, or that the first position acquisition unit 70 acquires the current position with high acquisition accuracy (in other words, the acquisition accuracy exceeds the accuracy reference value). It is. That is, when the second position acquisition unit 72 updates the position information based on the current time and the timetable, it cannot be determined that the user has got off at the disembarking station based only on the time. Accordingly, the user is likely to get off at the getting-off station based on the travel route displayed on the display unit 30. Therefore, when the user arrives at the disembarking station, the position information is updated until the appropriate information for updating the position information (voice including the station name or the first position by the first position acquisition unit 70) can be obtained. Information is maintained at the disembarking station. Thereby, the position of the user can be displayed on the display unit 30 with high accuracy.

  If the user keeps getting on the train without getting off at the station where the user should get off, the station name of the next stop station is announced by voice, and the second position acquisition unit 72 receives the position information based on this voice. Update. Accordingly, the display unit 30 displays the graphic P1 as the current position between the getting-off station and the next stop station. Therefore, it can be seen that the user keeps on the train by mistake.

  When the user gets off at the disembarking station and moves outdoors, the first position acquisition unit 70 acquires the current position with high acquisition accuracy, and updates the position information at the current position. Therefore, the figure P1 is displayed on the display unit 30 as the position of the user.

  FIG. 12 is a diagram illustrating an example of a specific operation of the second position acquisition unit 72. Compared with FIG. 7, steps ST77 to ST80 are executed. In this flow, a getting-off flag is introduced. The getting-off flag is a flag indicating whether or not the user has arrived at the transfer station.

  Step ST77 is executed when a positive determination is made in step ST72. In step ST77, the position estimation unit 124 deletes the getting-off flag from the storage unit (for example, the storage unit 103). Alternatively, the state of the getting-off flag is set to “inactive state”. Step ST78 is executed after step ST74 or when a positive determination is made in step ST76. In step ST78, the position estimation unit 124 determines whether or not the getting-off flag is stored in the storage unit. If the getting-off flag is not stored, step ST75 is executed. That is, if it has not yet arrived at the getting-off station, the current position is estimated based on the current time and the timetable.

  Step ST79 is executed after step ST75. In step ST79, the position estimation unit 124 determines whether the user has arrived at the getting-off station. Specifically, it is determined whether or not the distance between the current position indicated by the position information and the getting-off station is smaller than a predetermined fourth distance reference value. When the distance is smaller than the fourth distance reference value, it is determined that the vehicle has arrived at the getting-off station. If a negative determination is made in step ST79, the process ends. If a positive determination is made in step ST79, in step ST80, the position estimation unit 124 stores the getting-off flag in the storage unit. Alternatively, the state of the getting-off flag is set to “active state”.

  If a positive determination is made in step ST78, the process ends without executing step ST75. That is, when arriving at the getting-off station, the update of the position information based on the current time and the timetable is interrupted. Therefore, position information shows a transfer station.

  On the other hand, when the voice including the station name is input (step ST72), the getting-off flag is deleted (step ST77), and the position information is updated based on the current time and the timetable. That is, when the user gets on another train from the transfer station, the second position is calculated again and the position information is updated.

  When the user moves outdoors from the getting-off station, the position information is updated at the first position by the first position acquisition unit 70 (steps ST4 and ST5 in FIG. 6).

<Delay information>
Trains may not be able to operate according to the timetable due to various circumstances, and may be delayed. This train delay is announced at the station platform or inside the train. That is, the audio announcement includes delay information indicating the delay time. For example, a voice message “This train is running 5 minutes later” is announced. In addition, voices such as “I'm sorry to trouble you”, “Because of a sudden illness ~” or “Because of annoying acts ~” may be announced.

  Therefore, delay information indicating the delay time may be acquired from this sound, and the second position may be calculated using this delay information.

  FIG. 13 is a functional block diagram schematically illustrating an example of the configuration of the route guide unit 110. The route guide unit 110 further includes a delay information acquisition unit 126. The delay information acquisition unit 126 receives the voice content information from the voice recognition unit 122. The delay information acquisition unit 126 can determine whether or not the delay information is included in the audio content information. When it is determined that the delay information is included, the delay information can be acquired from the audio content information. The acquired delay information is output to the position estimation unit 124. In the above example, the delay time is 5 minutes.

  The position estimation unit 124 includes a timetable correction unit 1241 illustrated in FIG. The timetable correction unit 1241 adds a delay time to each time in the timetable and outputs corrected timetable information. For example, the delay time Δt is added to the arrival time t21 of the station A2 in the timetable, and the delay time Δt is added to the arrival time t22. The position estimation unit 124 calculates the second position as described above based on the station name, the corrected timetable, and the current time.

  Thereby, even if a delay occurs in the train, the second position can be calculated more appropriately.

<Station platform>
A characteristic sound may flow at the station platform. For example, a predetermined sound (for example, music) may flow when a train arrives / departs. In addition, a predetermined sound (for example, music) may flow before the voice announcement. Alternatively, the station staff may whistle to notify the arrival / departure of the train. Such a predetermined sound signal (also referred to as a registered home sound) may be stored in a storage unit (for example, the storage unit 103). Then, the audio signal from the audio input unit 46 is matched with the registered home sound, and when the registered home sound is included in the audio signal, it can be determined that the user is at the station home.

  Also, at the station platform, characteristic voice announcements such as “Please come down to the inside of the white line”, “A train arrives on the ○ line” or “The door opens / closes. Please be careful.” May flow. You may memorize | store at least one part of these as a registration announcement in a memory | storage part (for example, memory | storage part 103). When the registered announcement is included in the audio signal from the audio input unit 46, it can be determined that the user is at the station platform.

  Thus, if it can identify that the user is in the platform of a station, the acquisition precision of a user's present position can be improved. For example, when the user gets off at the getting-off station, the second position acquisition unit 72 cannot quickly confirm that the user has got off at the getting-off station in the estimation of the current position based on the current time and the timetable. In the operation described with reference to FIG. 12, it is predicted that the user will have got off at the getting-off station, and the position information is maintained at the getting-off station.

  Therefore, the second position acquisition unit 72 has a distance between the second position and the getting-off station shorter than a predetermined distance, and the audio signal from the audio input unit 46 includes a registered home sound or a registered announcement. Sometimes, it may be determined that the user has got off at the getting-off station. The information on the getting-off station is included in the travel route information. According to this, it can detect more reliably that the user got off at the getting-off station. And when it is judged that it got off at the getting-off station, the position information is maintained at the getting-off station.

  This position information is maintained until the station name information of the next stop station is acquired again or the current position is acquired with appropriate acquisition accuracy by the first position acquisition unit 70. According to this, position information can be acquired with high accuracy.

<Inside the train>
Also, inside the train, characteristic voice announcements such as "If you come to XX, please get off next" or "If you come to XX, please change next" may be heard. You may memorize | store at least one part of these as a registration registration announcement in a memory | storage part (for example, memory | storage part 103). When the in-train registration announcement is included in the sound signal from the sound input unit 46, it can be determined that the user is inside the train.

  When the station name is included in the voice together with the in-train registration announcement, the train route specifying unit 123 may acquire the station name information of the next stop station. That is, the station name information of the next stop station may be acquired after confirming that it is on the train. Thereby, the station name of the next stop station can be acquired with high accuracy.

  In the above-described example, the description has been made mainly using the train. However, the present invention can also be applied to other operating vehicles that move between a plurality of getting-on / off places. In this case, the station name information can be referred to as getting-on / off place name information, and the getting-off station can be called an getting-off place.

  In the above-described example, for example, registered station name information and related information are stored in advance in the storage unit in order to specify the station name. However, the present invention is not limited to this. The portable electronic device 100 may receive registered station name information and related information from an external device (for example, a server). Further, for example, the mobile electronic device 100 may transmit audio content information or an audio signal to the external device, the external device may acquire station name information, and the mobile electronic device 100 may receive the station name information from the external device.

  As mentioned above, although the route guidance part was demonstrated in detail, above-described description is an illustration in all the situation, Comprising: This route guidance part is not limited to it. Innumerable variations not illustrated can be envisaged without departing from the scope of the present invention.

  The embodiments can be implemented in combination with each other as long as they do not contradict each other.

30 display unit 46 voice input unit 70 first position acquisition unit 72 second position acquisition unit 110 route guide unit 111 route generation unit 115 display control unit 121 accuracy determination unit 125 route vicinity determination unit

Claims (6)

A route guidance device,
A display unit;
A first position acquisition unit that calculates a first position, which is a position of the route guidance device, based on a received signal from an artificial satellite;
A voice input unit that receives a name of a boarding / alighting place that is a name of a boarding / alighting place through which a traveling vehicle moving on a route passes, and converts the voice into a voice signal;
A second position acquisition unit that acquires boarding / exiting place name information included in the audio signal and calculates a second position that is the position of the route guidance device on a route based on the boarding / exiting place name information;
A position accuracy determination unit that determines the level of acquisition accuracy of the first position;
When it is determined that the acquisition accuracy is high, the display unit displays the first position on the display unit, and when it is determined that the acquisition accuracy is low, the display control unit displays the second position on the display unit. A route guidance device. The route guidance device according to claim 1,
The second position acquisition unit counts the current time, based on the boarding / alighting place name information, the current time information indicating the current time, and the timetable information indicating the timetable for the route. A route guidance device that calculates the position. The route guidance device according to claim 2,
The voice includes delay information indicating a delay time of the operating vehicle,
The second position acquisition unit identifies the delay information from the audio signal, adds the delay time to each time of the timetable information, and determines the second position based on the timetable information after the addition. Route guidance device to calculate. The route guidance device according to any one of claims 1 to 3,
The second position acquisition unit, when the distance between the first position acquired by the first position acquisition unit and the route immediately before it is determined that the acquisition accuracy is low is shorter than a distance reference value, A route guidance device for calculating a second position. The route guidance device according to any one of claims 1 to 4,
The boarding / exiting place is provided with a sound output device that outputs a sound specific to the boarding / exiting place,
The second position acquisition unit is a route guidance device that acquires the boarding / alighting place name information based on the unique sound input to the voice input unit. The route guidance device according to any one of claims 1 to 5,
A route generation unit for generating travel route information indicating a travel route including a part of the route;
The travel route information includes information on alighting location that is a boarding location where the vehicle gets off in the travel route,
When the distance between the second position and the getting-off location is shorter than a distance reference value, the second position acquisition unit has the acquisition accuracy higher than the accuracy reference value or includes the name of the getting-on / off location A route guidance device that maintains the second position at the dismounting location until is input to the voice input unit.

Images