Mountain walking navigation system

Abstract

To provide a mountainous area walking navigation system that enables good walking in mountainous areas.SOLUTION: A system 10 includes: a current position acquisition unit 22 that acquires a user's current position; a sensor 41 that detects the user's facing direction by making it a traveling direction; and a storage unit 40 that records a route file in which a starting point, a destination, and a way-point are plotted. The system 10 also includes: a creation unit 38 that creates a guide route object extending towards the traveling direction based on the route file and using the current position as a reference; and a determination unit 23 that calculates a positioning accuracy reduction rate based on the number of received signals from positioning satellites and the arrangement of positioning satellites to determine route reliability. A presentation control unit 39 presents the guide route object and the route reliability using a translucent monitor 36.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a mountain walking navigation system that provides route guidance from a starting point to a destination. [Background technology]

[0002] Navigation systems that provide route guidance from a departure point to a destination are known from Patent Documents 1 and 2. The navigation system of Patent Document 1 is a mobile terminal that provides route guidance to the user of the mobile terminal.

[0003] The navigation system of Patent Document 2 suggests using a wearable eyeglass device as a navigation system. The wearable eyeglass device provides route guidance within the landscape within the user's field of vision. Therefore, unlike Patent Document 1, the user does not need to stop to check the route. Patent Document 2 is most useful in urban areas where cars and roads are well-maintained. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2001-99664 [Patent Document 2] Japanese Patent Application Publication No. 2019-184439 Summary of the Invention [Problem to be solved by the invention]

[0005] However, general navigation systems such as those in Patent Document 1 do not have information on mountainous areas, and in addition, with Patent Document 1, the user must stop occasionally to check the route while walking. Note that if a user were to hold the navigation system (portable terminal) in Patent Document 1 in their hand and walk in mountainous areas while looking at the display of the portable terminal, this would be an unsafe and undesirable act.

[0006] Furthermore, the navigation system disclosed in Patent Document 2 does not have information on mountainous areas. In mountainous areas, the system is used in places where there are no distinctive features, so the arrow guidance disclosed in Patent Document 2, which simply indicates the direction of travel, such as left and right arrow guidance, may lead to getting lost and is not effective as guidance for walking in mountainous areas.

[0007] An object of the present invention is to provide a mountain walking navigation system that enables good mountain walking. [Means for solving the problem]

[0008] In order to solve the above problems, the mountain walking navigation system of the present invention is a mountain walking navigation system that includes a current position acquisition unit that acquires the user's current position based on received signals from positioning satellites, a detection unit that detects the direction the user is facing as the direction of travel, a recording unit that records a route file in which the starting point, destination point, and intermediate points are plotted, a creation unit that creates a guide route object that extends in the direction of travel based on the route file and with the current position as the reference, a wearable presentation unit that is worn on the user's head, and a presentation control unit that controls the presentation unit to present the guide route object in the user's field of view, and includes a determination unit that determines route reliability based on the number of received signals from the positioning satellites received by the current position acquisition unit and the rate of decline in positioning accuracy calculated based on the positioning satellites, and the presentation control unit causes the presentation unit to present the route reliability.

[0009] According to the above configuration, the current position acquisition unit acquires the user's current position. The detection unit detects the direction in which the user is facing as the direction of travel. Then, the creation unit creates a guide route object that extends in the direction of travel, based on the current position and on the route file recorded in the recording unit.

[0010] The determination unit determines the route reliability based on the number of received signals from the positioning satellites received by the current position acquisition unit and the rate of decline in positioning accuracy calculated based on the arrangement of the positioning satellites.The presentation control unit then causes the presentation unit to present the guide route object and the route reliability.

[0011] This allows the user to know from the route reliability information whether the currently presented guide route object is highly reliable or not. If the route reliability of the currently presented guide route object is high, the user can continue walking safely by following this guide route object. Also, if the route reliability of the currently presented guide route object is low, it is possible to provide the user with the opportunity to select another route.

[0012] The presentation control unit may cause the presentation unit to present the route reliability such that a display form of the guide route object differs between a route with high reliability and a route with low reliability.

[0013] If a guide route object with low route reliability is presented on the presentation unit but there is nothing to alert the user that the reliability of the guide route object is low, the user may not be able to grasp the current location and the correct route.

[0014] For example, if the number of received signals from positioning satellites is small, the current position measurement error may be large. Or, if the user suddenly turns their head, the detection unit that detects the direction the user is facing as the direction of travel may detect an error in the direction. In such cases, a guide route object with low route reliability is presented, and the user cannot grasp their current position and the correct route, and they may not even realize that they have deviated from the correct route.

[0015] According to the above configuration, the display form of the guide route object is presented differently depending on whether the route reliability is high or low. As a result, the user can tell from the difference in display form whether the route reliability has changed from high to low, or conversely, whether the route reliability has changed from low to high.

[0016] It is also preferable that the guide route object is displayed in a see-through manner by the presentation unit. This makes it easier for the user to see the scenery of the mountainous region in the direction of travel and the see-through guide route object superimposed on the scenery of the mountainous region within the user's field of vision, and as a result, the user can walk in the mountainous region in the direction of travel guided by the see-through guide route object without losing sight of their feet.

[0017] In other words, if route guidance is provided on a mobile device as in Patent Document 1, the user will have to hold the mobile device in their hand and walk while checking the route displayed on the mobile device without looking ahead. This type of walking is unsafe. Furthermore, in mountainous areas with poor footing and dense forests, holding a mobile device in one's hand means that one's hands are occupied, making it a dangerous behavior.

[0018] Furthermore, since conventional navigation systems target general roads, the navigation method is to display only an arrow to the next turning point (for example, an intersection). In contrast to this, the present invention displays a guide route object that extends continuously to indicate the direction after the turning point if there is a turning point.

[0019] It is also preferable that the current position acquisition unit continuously acquires the current position from time to time while the user is walking. This allows the current location of a user walking in mountainous areas to be continuously acquired.

[0020] The presentation control unit may also cause the presentation unit to present, based on the route file, a planned route that the user will walk, in plan view with the current position indicated, together with the guide route object.

[0021] As a result, the user can visually recognize the planned route in plan view with the current position indicated along with the guide route object in his or her field of view, thereby knowing the user's current position within the planned route.

[0022] The presentation control unit may cause the presentation unit to present, on the planned route, a history of the current position acquired by the current position acquisition unit. According to the above configuration, the user is presented with the history of the current location, i.e., the walking history, by the presentation unit, allowing the user to check the walking history along the route. [Effects of the Invention]

[0023] According to the present invention, if the route reliability of the currently presented guide route object is high, the user can continue walking safely by following this guide route object. Also, if the route reliability of the currently presented guide route object is low, the user can be given the opportunity to select another route. [Brief explanation of the drawings]

[0024] [Figure 1] 1 is an overall schematic diagram of a mountain walking navigation system according to a first embodiment. [Figure 2] FIG. 1 is a schematic diagram of the hardware configuration of the AR device and mobile terminal of the mountain walking navigation system. [Figure 3] An explanatory diagram of a route file. [Figure 4] FIG. 10 is an explanatory diagram of a route file viewed in a planar manner based on a wearable display unit of a user. [Figure 5] FIG. 10 is an explanatory diagram of a guide route object when viewed by a user on a wearable presentation unit. [Figure 6] FIG. 10 is an explanatory diagram showing the correlation between a guide route object projected within an expected projection range viewable by a wearable presentation unit and a route file. [Figure 7] (a) is an explanatory diagram when the direction of the glasses is different from the extension direction of the route file, and (b) is an explanatory diagram of the screen of the guide route object that the user sees with the glasses in the case of (a). [Figure 8] 10 is an explanatory diagram of a screen showing a real landscape that the user can see on a wearable display unit and a guide route object with high route reliability. [Figure 9] 10 is an explanatory diagram of a screen showing a real landscape that the user can see on a wearable display unit and a guide route object with low route reliability. [Figure 10] FIG. 10 is an overall schematic diagram of a mountain walking navigation system 10 according to a second embodiment. [Figure 11] FIG. 10 is an overall schematic diagram of a mountain walking navigation system 10 according to a third embodiment. [Figure 12] FIG. 10 is an overall schematic diagram of a mountain walking navigation system 10 according to a fourth embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0025] A mountain walking navigation system 10 of the present invention will be described below with reference to Figures 1 to 9. The mountain walking navigation system 10 will be simply referred to as the system 10 hereinafter. As shown in FIG. 1, a system 10 of this embodiment includes a mobile terminal 20 carried by a user and smart glasses 30 worn on the head of the user.

[0026] <Mobile terminal 20> As shown in FIG. 2, the mobile terminal 20 includes a control unit 21, a storage unit 24, an operation unit 25, a display unit 26, a communication unit 27, and the like.

[0027] The control unit 21 includes a CPU, a ROM, a RAM, etc. (not shown). The CPU loads a program stored in the storage unit 24 into the RAM and executes it, thereby controlling the operation of each component included in the mobile terminal 20 and controlling the execution of various information processes. Examples of the programs include a processing program for a current position acquisition unit 22 and a processing program for a determination unit 23, which will be described later.

[0028] The storage unit 24 is a non-volatile storage device and is configured by a semiconductor memory, etc. The storage unit 24 stores various programs and various data required for the control unit 21 to execute information processing.

[0029] The storage unit 24 also stores a route file F of a planned route R through mountainous areas that the user will walk, as shown in Fig. 3. The route file F includes the starting point ST, the destination point E, and the waypoints Kn (n = 1, 2, ...) between the starting point ST and the destination point E of the planned route R. The route file F is created by the user plotting and inputting the starting point ST, the destination point E, and the waypoints Kn between the starting point ST and the destination point E on the operation unit 25 on a map including the planned walking route R, while the map is displayed on the display unit 26. As shown in Fig. 3, the route file F describes map data based on the north direction.

[0030] The operation unit 25 is a user interface for receiving instructions from the user of the mobile terminal 20 and outputting the instructions to the control unit 21. The operation unit 25 is configured with, for example, a touch panel, operation keys, etc. The operation unit 25 also serves as a user interface for outputting operation instructions (commands) to a control unit 32 of the smart glasses 30, which will be described later.

[0031] The display unit 26 is a user interface for displaying the results of information processing by the mobile terminal 20, and is configured by a display device using a liquid crystal display, an LED, or the like. The communication unit 27 includes a transmitting / receiving antenna (not shown) and a positioning satellite antenna (shown in Fig. 1) that receives signals from the positioning satellite S. The communication unit 27 also functions as a communication interface for communicating with external devices including the control unit 32 via the transmitting / receiving antenna. The positioning satellite antenna receives signals including positioning information from the positioning satellite S. The positioning satellite S is a satellite of the Global Navigation Satellite System (GNSS), which includes the United States' Global Positioning System (GPS), the European Union's (EU) "Galileo," Russia's "Glonass," China's "Beidou," and Japan's "Quasi-Zenith Satellite."

[0032] (Regarding the control unit 21) The current position acquisition unit 22 of the control unit 21 calculates the latitude, longitude, and altitude of the mobile terminal 20 based on the signal received by the positioning satellite antenna whenever the user is walking, and acquires the current position of the mobile terminal 20. In other words, the current position of the user equipped with the mobile terminal 20 is acquired whenever the user is walking.

[0033] The determination unit 23 of the control unit 21 counts the number of signals received by the positioning satellite antenna (i.e., the number of received signals), and calculates a positioning accuracy degradation rate by a known method based on the arrangement of the positioning satellites S. Then, the determination unit 23 determines the reliability of the route including the current position acquired by the current position acquisition unit 22, based on the number of received signals and the positioning accuracy degradation rate.

[0034] The reason why the number of received signals is necessary when determining the route reliability is as follows: Received signals from at least four positioning satellites S are required to calculate the coordinates of the current position (self-position). Note that, in mountainous areas, in order to keep the error between the planned route R (regular route) and the current position within 5 m based on received signals from currently launched positioning satellites S, it is most preferable to be able to receive received signals from 10 or more positioning satellites S. For this reason, the determination unit 23 evaluates and determines that the "reliability related to the number of signals" is higher the greater the number of received signals. Furthermore, when the number of received signals is 3 or less, the determination unit 23 evaluates and determines that the "reliability related to the number of signals" is the lowest reliability.

[0035] The dilution of precision of positioning can be, for example, the geometric dilution of precision (GDOP), the horizontal dilution of precision (HDOP), or the position dilution of precision (PDOP). The larger the value, the lower the accuracy. Of these values, the geometric dilution of precision (GDOP) is preferred as the value used to determine the "confidence in the dilution of precision of positioning," but this is not the only value used, and other values ​​may also be used. These values ​​are coefficients indicating the magnification factor of the error in two-dimensional (HDOP) or three-dimensional (PDOP) positioning of the distance measurement error from the positioning satellite S. These values ​​can be obtained from the trace of the covariance matrix, which is determined only by the positional relationship between the positioning satellite S and the user.

[0036] In order to keep the error between the regular route and the current position within 5 meters in mountainous areas based on signals received from currently launched positioning satellites S, it is preferable that the positioning accuracy degradation rate be 1.5 or less. A positioning accuracy degradation rate of 1 is the highest. For this reason, the determination unit 23 evaluates and determines that the "reliability of the positioning accuracy degradation rate" is the highest when the positioning accuracy degradation rate is 1.5 or less. Furthermore, when the number of received signals "exceeds 1.5," the determination unit 23 evaluates and determines that the "reliability of the positioning accuracy degradation rate" is lower as the value increases.

[0037] Furthermore, the determination unit 23 determines the route reliability based on a combination of the determination results of "reliability related to the number of signals" and "reliability related to the rate of deterioration in positioning accuracy." The following is an example of the route reliability determined by the determination unit 23 based on a combination of the respective determination results, and is not limited thereto.

[0038] <High route reliability> For example, the route reliability is judged to have three levels, but it is not limited to three levels and may have multiple levels other than three. In the case of three levels, the route reliability is judged to be high when the "reliability regarding the number of signals" and the "reliability regarding the rate of decline in positioning accuracy" are high. A high "reliability regarding the number of signals" is, for example, when signals are received from 10 or more positioning satellites S as described above. Furthermore, a high "reliability regarding the rate of decline in positioning accuracy" is when the rate of decline in positioning accuracy as described above is 1.5 or less.

[0039] <Medium route reliability> Next, if either the "reliability regarding the number of signals" or the "reliability regarding the rate of deterioration of positioning accuracy" is determined to be medium and the other is determined to be high, or if both are determined to be medium, the route reliability is determined to be medium. Here, "reliability regarding the number of signals" is medium when, for example, the number of received signals is 4 or more and less than 10. Furthermore, "reliability regarding the rate of deterioration of positioning accuracy" is medium when the rate of deterioration of positioning accuracy described above is greater than 1.5 and, for example, less than a predetermined value of 3. Here, the predetermined value is a value when accuracy degradation is recognized, but is not limited to 3.

[0040] <Low route reliability> Next, if at least one of the "reliability regarding the number of signals" and the "reliability regarding the rate of degradation of positioning accuracy" is evaluated to be the lowest, the route reliability is determined to be low. Here, a low level of "reliability regarding the number of signals" refers to, for example, the number of received signals being less than 4. Also, a low level of "reliability regarding the rate of degradation of positioning accuracy" refers to, for example, the rate of degradation of positioning accuracy exceeding a predetermined value of 3.

[0041] While the system 10 is operating, the user's current location and the route reliability determined by the determination unit 23 are transmitted from time to time to the control unit 32 of the smart glasses 30 via the communication unit 27.

[0042] <Smart Glasses 30> The smart glasses 30 shown in FIGS. 1 and 2 include glasses 31 and a control unit 32.

[0043] The glasses 31 have left and right rims 33, left and right temples 34 respectively connected to the left and right rims 33, and a translucent monitor 36 provided in a light transmitting portion 35 of the rim 33. The glasses 31 can be worn on the user's head by hanging the left and right temples 34 over the user's left and right ears. Furthermore, since the glasses 31 are wearable as described above and the translucent monitors 36 face the left and right eyes of the user, respectively, they can display an image that the user can visually confirm as a transparent image.

[0044] The light transmitting unit 35 may be a vision correcting lens for farsightedness, nearsightedness, varifocals, or astigmatism, or may be fashion glasses or glasses for hay fever. The glasses 31 equipped with the semi-transparent monitor 36 correspond to the presentation unit.

[0045] 2, the control unit 32 is attached to one of the temples 34. The control unit 32 includes a control unit 37, a storage unit 40, a sensor 41, a communication unit 42, and an operation unit 43.

[0046] The control unit 37 includes a CPU, a ROM, a RAM, etc. (not shown). The control unit 37 controls the operation of each component included in the control unit 32 by causing the CPU to load a program stored in the storage unit 40 into the RAM and execute it in response to an operation instruction (command) input from the mobile terminal 20. In addition, the control unit 37 controls the execution of various information processes. Examples of the program include navigation software that causes the control unit 37 to function as a creation unit 38 and a presentation control unit 39 (described later).

[0047] The storage unit 40 is a non-volatile storage device and is configured with a semiconductor memory or the like. The storage unit 40 stores various programs and various data required for the execution of information processing in the control unit 21. The storage unit 40 also stores the root file F transmitted from the mobile terminal 20. The storage unit 40 corresponds to a recording unit.

[0048] The sensor 41 includes a geomagnetic sensor. The sensor 41 corresponds to a detection unit. The geomagnetic sensor detects the orientation of the control unit 32 (i.e., the orientation of the glasses 31). The geomagnetic sensor also detects magnetic north. The geomagnetic sensor may be, for example, an MR sensor or an MI sensor.

[0049] The communication unit 42 is equipped with a transmitting and receiving antenna (not shown). The communication unit 42 also serves as a communication interface for communicating with the mobile terminal 20 via the transmitting and receiving antenna. In this embodiment, the communication unit 42 and the communication unit 27 of the mobile terminal 20 communicate with each other via wireless communication in accordance with the Bluetooth (registered trademark) standard. Note that the wireless communication is not limited to Bluetooth, and other communication methods may also be used. Furthermore, communication between the communication units 42 and 27 may be performed via a transmission cable.

[0050] The operation unit 43 is composed of a switching operation button, etc. By switching the operation of the operation unit 43, it is possible to select a display state on the planned route R displayed in the display area 36a between a first display state in which only the current position at the current time is displayed, and a second display state in which the history of the current position is displayed.

[0051] (Regarding the control unit 37) The creation unit 38 of the control unit 37 creates a guide route object GR based on the user's current location transmitted from the mobile terminal 20 at each time and the route file F stored in the storage unit 40. The control unit 37 also stores in the storage unit 40 the history of the user's current location transmitted from the mobile terminal 20 at each time.

[0052] A method for creating a guide route object GR performed by the creation unit 38 will be described with reference to FIGS. 4 to 6. FIG. 4 is an explanatory diagram of a route file F viewed in a plane based on the user's wearable display unit. As shown in FIG. 4, in order to draw point A (waypoint K1) on the route file F on the semi-transparent monitor 36 (glasses), the creation unit 38 acquires an azimuth angle based on magnetic north detected by a geomagnetic sensor. Here, the azimuth angle is shown as true north in FIG. 4. Because the magnetic north (azimuth angle) detected by the geomagnetic sensor and true north have different declination angles depending on the location, the creation unit 38 corrects this using the declination table stored in the storage unit 40, using the formula "true north = magnetic north + declination table value."

[0053] Note that points A (Xa, Ya), B (Xb, Yb), and C (Xc, Yc) shown in Figure 4 indicate waypoints Kn or destination points E on the route file F. The current position is point M (XY).

[0054] In FIG. 4, the orientation of the glasses 31 is the direction in which the user is moving, and this orientation is acquired based on detection by a geomagnetic sensor. FIG. 6 is an explanatory diagram showing the correlation between the guide route object GR projected within the expected projection range viewable by the wearable presentation unit and the route file F, as viewed from the side of the user H.

[0055] As shown in FIG. 6, the semi-transparent monitor 36 of the glasses 31 has a size of width W×height h, and is located at an assumed projection distance d from the retina of the user H. The creation unit 38 performs coordinate conversion so that the points where lines L1 and L2, which connect points A, B, etc., and the base point on the retina, intersect on the semi-transparent monitor 36 at an assumed projection distance d, become points Ag(xag, yag), Bg(xbg, ybg), etc. on the projected image. Furthermore, the reference point Mg(xg, yg) on ​​the semi-transparent monitor 36 is the position of the current position (point M) on the semi-transparent monitor 36. Here, the reference point Mg(xg, yg) is preferably the midpoint in the horizontal direction of the bottom edge of the semi-transparent monitor 36. In particular, the "central visual field" of a person is the field of view within approximately 30 degrees around a fixation point, where the eyes are fixed without moving. Therefore, it is desirable to locate the reference point Mg(xg, yg) within this "central visual field."

[0056] The creation unit 38 then interpolates and connects the reference points Mg(xg, yg), Ag(xag, yag), Bg(xbg, ybg), and the like with straight lines. In addition, as shown in FIG. 5, the creation unit 38 creates a see-through guide route object GR in which the lines connecting the points are wider as they approach the reference point Mg and narrower as they are further away from the reference point Mg.

[0057] In this embodiment, when the reference points Mg(xg, yg), point A, point B, etc. are arranged in a straight line, the guide route object GR is created in a straight line, and when they are not arranged in a straight line, the guide route object GR is created by connecting them in a broken line. Also, when the reference points Mg(xg, yg), point A, point B, etc. are not arranged in a straight line, the guide route object GR may be created in a curved line by connecting those points instead of in a broken line.

[0058] This see-through guide route object GR is created according to the route reliability transmitted together with the current location from the mobile terminal 20. In this embodiment, the color of the guide route object GR is set according to the level of route reliability (high, medium, low).

[0059] For example, a high level of route reliability is displayed in blue, a medium level in yellow, and a low level in red. The color settings and combinations for the level of route reliability are not limited to the above example, and other color settings and combinations may also be used.

[0060] Alternatively, instead of displaying the route in color, the route's contour may be transformed into a different shape depending on the level of route reliability. For example, the contour of the route may be a straight line, a sine curve, or a pulse shape depending on the elevation of the route.

[0061] As an example of the see-through form, the guide route object GR may be formed by a wire frame, or may be partially see-through such as a lattice, mesh, or hatching, or may be in other forms.

[0062] While a user wearing the system 10 is walking in a mountainous area, the creating unit 38 creates a guide route object GR at a predetermined cycle. The presentation control unit 39 displays the guide route object GR created by the creation unit 38 on the semi-transparent monitor 36 as an image.

[0063] The creation unit 38 determines whether the orientation of the glasses 31, i.e., the user's traveling direction and the direction of the line connecting the current position point M and point A, differ by a predetermined angle or more, and determines that the user is facing the wrong direction if the difference is greater than the predetermined angle. In this case, the creation unit 38 creates a traveling direction guidance guide object SG that points in the guiding direction of the guide route object GR.

[0064] The presentation control unit 39 presents the guide route object GR and the traveling direction guidance object SG created by the creation unit 38 in the field of view of the user by displaying the guide route object GR and the traveling direction guidance object SG as images on the semi-transparent monitor 36.

[0065] Fig. 7(a) shows a case where the direction (travel direction) of the glasses 31 is facing is different from the direction in which the route file F extends. Fig. 7(b) shows a guide route object GR that the user can see on the semi-transparent monitor 36 of the glasses 31 in this case. As shown in Fig. 7(b), the travel direction guidance guide object SG guides the user H to face in the direction in which the guide route object GR extends. Fig. 7(a) shows that the travel direction guidance guide object SG in Fig. 7(b) is facing toward the planned route R to be guided by the guide route object GR.

[0066] Furthermore, the creation unit 38 creates the planned route R described in the route file F and the current position on the planned route R based on the user's current position transmitted from the mobile terminal 20 at any given time and the route file F stored in the storage unit 40. As shown in FIGS. 8 and 9, the presentation control unit 39 displays the planned route R and the current position RM on the planned route R created by the creation unit 38 as an image in the display area 36a of the semi-transparent monitor 36. It is desirable that the position of the display area 36a on the semi-transparent monitor 36 does not interfere with the display of the guide route object GR. In particular, it is desirable to avoid the area near the reference point Mg on the guide route object GR, as this is an area close to the user's feet.

[0067] For this reason, it is desirable to displace the display area 36a to the left or right side, or to displace it upward, of the semi-transparent monitor 36. In this embodiment, the display area 36a is displaced toward the upper left corner of the user's field of vision.

[0068] In addition, in response to a switching operation of the operation unit 43, the control unit 37 causes the presentation control unit 39 to perform either a first display that displays only the current position at the current time on the planned route R, or a second display that displays the history of the current position.

[0069] (Operation of the embodiment) The operation of the system 10 configured as above will be described with reference to FIGS. 1 on his / her head and carries the mobile terminal 20 in a pocket or the like of his / her clothes. When walking in a mountainous area, the user H starts the system 10 and transmits the route file F, which has been stored in advance in the storage unit 24, to the smart glasses 30 via the communication unit 27, and stores the route file F in the storage unit 40 of the smart glasses 30.

[0070] In this state, when the user H walks in a mountainous area, the user H can see the guide route object GR and scenery including the mountainous area displayed on the semi-transparent monitor 36 of the smart glasses 30 (see FIGS. 8 and 9). The planned route R and the current position RM are also displayed on the semi-transparent monitor 36. Note that FIGS. 8 and 9 show a first display state in which the display area 36a displays only the current position at the current time on the planned route R. Although not shown, in the case of a second display state, points indicating the history of the current position are plotted and displayed in a column spaced apart from each other on the planned route R.

[0071] The example in FIG. 8 shows a case where the route reliability is high, and a blue see-through guide route object GR is displayed on the semi-transparent monitor 36 of the light passing section 35 of the glasses 31 as an image on a mountainous area in the landscape.

[0072] The example in Fig. 9 shows a case where the route reliability is medium or low, and a see-through guide route object GR displayed in a color different from that displayed in the case of high or low reliability is displayed on the semi-transparent monitor 36 of the light passing section 35 of the glasses 31. For ease of explanation, the difference in color display is expressed by changing the direction of hatching in Figs. 8 and 9.

[0073] 8, the guide route object GR is displayed in a color that indicates high route reliability, allowing the user to walk safely through mountainous areas guided by the guide route object GR.

[0074] In the example of Fig. 9, the guide route object GR is displayed in a color indicating that the route reliability is medium or low. This allows the user to know that the guide route object GR is not accurate. Therefore, when guided by only the guide route object GR, the user can be advised to walk carefully in mountainous areas, taking into consideration the surrounding conditions as well.

[0075] Furthermore, if the difference between the orientation of the glasses 31, the current position, and the extending direction of the guide route object GR is equal to or greater than a predetermined angle, the creation unit 38 displays a travel direction guidance guide object SG (see FIG. 7(b)). This travel direction guidance guide object SG guides the user H to face the extending direction of the guide route object GR.

[0076] This embodiment has the following features. (1) The system 10 of this embodiment includes a determination unit 23 that determines route reliability based on the number of received signals from positioning satellites S received by the current position acquisition unit 22 and the rate of decline in positioning accuracy calculated based on the arrangement of the positioning satellites S. The presentation control unit 39 causes the semi-transparent monitor 36 (presentation unit) to present the guide route object GR and the route reliability of this guide route object GR.

[0077] As a result, the user can know from the route reliability information whether the currently presented guide route object is highly reliable or not. If the route reliability of the currently presented guide route object is high, the user can continue walking safely by following this guide route object. Furthermore, if the route reliability of the currently presented guide route object is deemed to be low, it is also possible to provide the user with the opportunity to select another route.

[0078] (2) The presentation control unit 39 of the present system 10 presents the route reliability on the translucent monitor 36 in such a way that the display form of the guide route object GR differs between high and low route reliability. As a result, the user can tell from the difference in display form whether the route reliability has changed from high to low, or conversely, whether the route reliability has changed from low to high.

[0079] (3) The presentation control unit 39 of the present system 10 displays the guide route object in a see-through manner on the semi-transparent monitor 36 (presentation unit). This makes it easier for the user to see the scenery of the mountainous region in the direction of travel and the see-through guide route object GR superimposed on the scenery of the mountainous region within the user's field of vision. As a result, the user can walk in the mountainous region in the direction of travel guided by the see-through guide route object without losing sight of his or her feet.

[0080] (4) The current position acquisition unit 22 of the system 10 of this embodiment continuously acquires the current position from time to time while the user is walking. This allows the current position of the user walking in mountainous areas to be continuously acquired.

[0081] (5) The presentation control unit 39 of the system 10 of this embodiment presents, based on the route file F, the planned route R along which the user will walk, in plan view, showing the current position, together with the guide route object GR, on the translucent monitor 36.

[0082] As a result, the user can visually recognize the guide route object GR and the planned route in plan view with the current position displayed in the field of view, thereby knowing the user's current position within the planned route.

[0083] (6) The presentation control unit 39 of the system 10 of this embodiment causes the semi-transparent monitor 36 to present the history of the current location acquired by the current location acquisition unit 22 on the planned route. This allows the user to check the walking history along the route.

[0084] (Second embodiment) Next, a system 10 according to another embodiment will be described with reference to Fig. 10. In the following embodiments, including this embodiment, configurations different from those of the already described embodiments will be described, and configurations that are the same as or equivalent to those of the already described embodiments will be assigned the same reference numerals as those of the already described embodiments, and detailed description thereof will be omitted.

[0085] In the system 10 of this embodiment, the mobile terminal 20 is omitted, and the mountain walking navigation system 10 is configured by the smart glasses 30 themselves. That is, as shown in FIG. 10 , the control unit 32 of the smart glasses 30 has a communication unit 27 similar to that of the mobile terminal 20 of the first embodiment. The communication unit 27 includes a transmitting / receiving antenna (not shown) and a positioning satellite antenna for receiving signals from a positioning satellite S. The communication unit 27 also serves as a communication interface for communicating with an external device via the transmitting / receiving antenna. The control unit 37 also includes a current position acquisition unit 22, a determination unit 23, a creation unit 38, and a presentation control unit 39. The control unit 32 also includes an operation unit 25. The operation unit 25 also has the function of an operation unit 43. The control unit 32 includes a sensor 41.

[0086] The storage unit 40 stores a root file F that is input via the communication unit 27 and created by another external device. By configuring the system 10 in this way, the smart glasses 30 alone can achieve the same effects as those of the first embodiment.

[0087] (Third embodiment) As shown in FIG. 11, the system 10 of the third embodiment is configured by smart glasses 30 and a receiver 50, with the mobile terminal 20 omitted from the configuration of the system of the first embodiment.

[0088] 11, the receiver 50 includes a current position acquisition unit 52, a determination unit 53, and a communication unit 54. The communication unit 54, like the communication unit 27 of the first embodiment, includes a transmitting / receiving antenna (not shown) and a positioning satellite antenna that receives signals from a positioning satellite S of the Global Navigation Satellite System (GNSS). The communication unit 54 also serves as a communication interface for communicating with an external device via the transmitting / receiving antenna, and is capable of communicating with the communication unit 42 of the smart glasses 30.

[0089] The current location acquisition unit 52 of the receiver 50 has the same function as the current location acquisition unit 22 of the mobile terminal 20 of the first embodiment. The determination unit 53 has the same function as the determination unit 23 of the mobile terminal 20 of the first embodiment. The communication unit 54 transmits the current location acquired by the current location acquisition unit 52 and the route reliability determined by the determination unit 53 to the communication unit 42 of the control unit 32.

[0090] By configuring the system 10 in this way, the smart glasses 30 and the receiver 50 can achieve the same effects as those of the first embodiment. (Fourth embodiment) As shown in FIG. 12, the system 10 of the fourth embodiment has the same configuration as the first embodiment, except that in addition to the mobile terminal 20 and smart glasses 30, the system 10 also has the configuration of the receiver 50 described in the third embodiment.

[0091] However, unlike the first embodiment, the control unit 21 of the mobile terminal 20 of this embodiment does not have the functions of the current location acquisition unit 22 and the determination unit 23. Instead, the receiver 50 has a current location acquisition unit 52, a determination unit 53, and a communication unit 54, similar to the third embodiment.

[0092] In the system 10 of this embodiment, the current position acquired by the current position acquisition unit 52 of the receiver 50 and the route reliability determined by the determination unit 53 are transmitted to the mobile terminal 20 via the communication units 54 and 27. Then, the current position and the route reliability received by the mobile terminal 20 are transmitted to the smart glasses 30 via the communication units 27 and 42. Note that the route file F is created by the mobile terminal 20, and the route file F is stored in the storage unit 40 in the same manner as in the first embodiment.

[0093] By configuring the system 10 in this way, the mobile terminal 20, the smart glasses 30, and the receiver 50 can achieve the same effects as those of the first embodiment. This embodiment can be modified and implemented as follows.

[0094] This embodiment and the following modified examples can be implemented in combination with each other within the scope of technical compatibility. In the above embodiment, the smart glasses 30 use the semi-transparent monitor 36 as the presentation unit, but a retinal projection display attached to the glasses 31 may be used as the presentation unit instead of the semi-transparent monitor 36. The retinal projection display directly projects the guide route object GR onto the user's eyes. As a result, the guide route object GR projected by the retinal projection display is superimposed on the mountain scenery seen through the light passing unit 35 in the user's eyes.

[0095] In the above embodiment, the route file F is created by plotting the starting point ST, the waypoints Kn, and the destination point E on a map and inputting them into the operation unit 25 of the mobile terminal 20. Alternatively, the route file F may be created by having the pedestrian actually walk through a mountainous area once, acquiring a current position log from the positioning satellite S during the walk, and using the log as a reference.

[0096] In the above embodiment, the orientation of the control unit 32 (i.e., the orientation of the glasses 31) is detected by a geomagnetic sensor, but the orientation of the control unit 32 (i.e., the orientation of the glasses 31) may also be detected by a gyro sensor or an acceleration sensor.

[0097] In the above embodiment, the wearable type is the glasses 31, but it may also be a head-mounted type. In the above embodiment, the glasses 31 of the smart glasses 30 have a pair of left and right light passing portions 35, but this is not limited to a pair of left and right light passing portions 35, and one of the light passing portions 35 may be omitted.

[0098] In the above embodiment, the guide route object GR is displayed in different ways depending on whether the route reliability is high or low, but instead, the route reliability may be displayed numerically. Alternatively, the route reliability may be displayed as a level using a bar graph or the like according to the magnitude of the route reliability, with the highest route reliability being the maximum level value and the lowest route reliability being the minimum level value. [Explanation of symbols]

[0099] 10. Mountain walking navigation system 20...Mobile device 21...Control unit 22…Current position acquisition unit 23…Judgment section 24...Storage section 25...Operation unit 26…Display section 27…Communications Department 30...Smart glasses 31...Glasses 32...Control unit 35...Light passing section 36...Translucent monitor 36a...display area 37...Control unit 38...Creation Department 39...Presentation control unit 40...Storage section 41...Sensor 42…Communications Department 43...Operation unit 50...Receiver 52…Current position acquisition unit 53…Judgment section 54…Communications Department H…User F...Root file Kn...waypoint R...Planned route SG: Directional guidance object GR...Guide Route Object ST…Departure point E…destination point S...Positioning satellite

Claims

1. a current position acquisition unit that acquires the current position of a user based on a signal received from a positioning satellite; a detection unit that detects the direction in which the user is facing as a direction of travel; a recording unit that records a route file in which a starting point, a destination point, and intermediate points are plotted; a creation unit that creates a guide route object that extends in the direction of travel based on the route file and with the current position as a reference; a wearable presentation unit that is worn on the head of the user; and a presentation control unit that controls the presentation unit to present the guide route object in the user's field of vision, the presentation unit is glasses equipped with a semi-transparent monitor, a determination unit that determines route reliability based on a positioning accuracy degradation rate calculated based on the number of received signals from the positioning satellites received by the current position acquisition unit and an arrangement of the positioning satellites, The presentation control unit causing the presentation unit to present the route reliability; a reference point, which is the current position of the guide route object, being presented at a midpoint in the left-right direction of a lower side of the presentation unit; and displaying the planned route, which is a planned route for the user to walk based on the route file and which shows the current position, in a planar view at a position that does not interfere with the display of the guide route object on the display unit. Mountain walking navigation system.

2. The presentation display unit biases a display area displaying the planned route toward the upper left corner or the upper right corner in the user's field of view.

2. A mountain walking navigation system according to claim 1.

3. A mountain walking navigation system as described in claim 1 or claim 2, wherein the presentation control unit causes the presentation unit to present the route reliability in such a way that the display form of the guide route object differs depending on whether the route reliability is high or low.

4. A mountain walking navigation system as described in any one of claims 1 to 3, wherein the guide route object is displayed in a see-through manner by the presentation unit.

5. A mountain walking navigation system as described in any one of claims 1 to 4, wherein the current position acquisition unit continuously acquires the current position from time to time while the user is walking.

6. A mountain walking navigation system described in any one of claims 1 to 5, wherein the presentation control unit causes the presentation unit to present the history of the current position acquired by the current position acquisition unit on the planned route.

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