JP4568760B2 - Portable route guidance device, route guidance method, route guidance program, and recording medium - Google Patents

Description

【Technical field】
[0001]
The present invention relates to a portable route guidance device, a route guidance method, a route guidance program, and a recording medium for guiding a route. However, the use of the present invention is not limited to the above-described portable route guidance device, route guidance method, route guidance program, and recording medium.
[Background]
[0002]
Conventionally, a guidance system for reducing the size, weight and cost of a mobile terminal has been disclosed (see Patent Document 1 below). This guidance system has a liquid crystal display panel on the surface, a solar cell panel as a power source, and a key input unit for selecting a location, and an arrow for directing in the traveling direction on the same plane as the liquid crystal display panel. Using a card-shaped portable terminal provided with a display, the portable terminal determines the current position and traveling direction by passing through the radio wave arrival range of each transmitting device, and this and the destination selected by the key input unit Then, the relative direction of the destination with respect to the traveling direction is determined, and the relative direction is notified by an arrow on the liquid crystal display panel.
[0003]
Also, the direction to the desired location and the map information are displayed so as to match the direction in which the mobile phone terminal is facing, and it is clear on the display of the mobile phone terminal which direction the user is facing or should proceed An orientation display system for a mobile phone terminal, a mobile phone terminal with an orientation display function, an orientation display method in a mobile phone terminal, a program, and a computer-readable recording medium are disclosed (see Patent Document 2 below). ). This mobile phone terminal inputs the destination information, sends the destination information and the current position of the terminal to the mobile phone terminal orientation display system, and the system calculates the direction and distance from the current position to the destination. The direction and distance information to the destination is sent back to the mobile phone terminal, and the mobile phone terminal receives the direction and distance information to this destination, and the predetermined front direction of the mobile phone terminal detected from the geomagnetism is the terminal front direction. The direction to the destination is displayed together with the distance with an arrow toward the destination so as to match the state where the predetermined front of the mobile phone terminal is facing.
[0004]
Patent Document 1: Japanese Patent Laid-Open No. 2000-242885
Patent Document 2: Japanese Patent Laid-Open No. 2003-299136
Disclosure of the invention
Problems to be solved by the invention
[0005]
However, in the above-described conventional technology, the guidance direction is shown on the map of the display screen of the mobile terminal, and it is necessary to hold the posture of the mobile terminal so that the display screen is approximately parallel to the ground. Therefore, if the orientation of the mobile terminal changes and the display screen is not parallel to the ground, the meaning of the arrow indicating the direction of guidance becomes unclear and accurate guidance cannot be performed as an example. .
[0006]
Also, when displaying the guidance direction on the map of the display screen of the mobile terminal, the user of the mobile terminal compares the map on the display screen with the actual scene at the current location at the current location, and follows the guidance direction on the map. An example of the problem is that it is necessary to confirm whether or not the user is moving. In particular, when an instantaneous determination is required such as at the time of a disaster, there is a problem that an emergency evacuation guidance cannot be performed because there is no room to compare the map with the scene at the current location.
[0007]
In addition, a terminal without a display screen cannot display a map or a guidance direction, and there is a problem that guidance cannot be performed. Moreover, even if it has a display screen, if the display screen is used, the remaining battery level is reduced. Therefore, in a situation where the remaining battery level is low, route guidance cannot be performed with peace of mind.
Means for solving the problem
[0008]
The portable route guidance device according to the invention of claim 1 is a portable route guidance device that performs route guidance to a destination point, and scans visible laser light with an acquisition means for obtaining information on the current location of the moving object. The projecting means for projecting the visible laser beam as a light beam onto the projection surface outside the moving body, and controlling the projecting means, based on the information on the current location acquired by the acquiring means, up to the destination point Projection control means for projecting the luminous flux so as to display a guidance image regarding the traveling direction from the current point following the guidance path, and detection for detecting the direction of the projection surface from the apparatus main body and the projection direction of the luminous flux Means for calculating an angle between the traveling direction, the direction of the projection surface detected by the detection means, and the projection direction of the luminous flux, Projection control means, based on the angle between the projection direction of the light beam and the direction of the projection surface calculated by said calculation means, characterized by projecting the light beam.
[0009]
The route guidance method according to the invention of claim 11 is a route guidance method for a portable route guidance device that performs route guidance to a destination point, an acquisition step for obtaining information on the current location of the mobile object, and visible laser light. By projecting the visible laser beam as a light beam onto the projection surface outside the moving body, and controlling the projection means, and based on the information on the current location acquired by the acquisition step, the object A projection control step of projecting the luminous flux, and a direction of the projection surface from the apparatus main body and a projection direction of the luminous flux so as to display a guidance image relating to the traveling direction from the current location that follows the guidance route to the location. A detecting step for detecting, and a calculating step for calculating an angle between the traveling direction, the direction of the projection surface detected by the detecting step, and the projection direction of the luminous flux; Hints, in the projection control step, based on the angle between the projection direction of the light beam and the direction of the projection surface calculated by the calculating step, characterized by projecting the light beam.
[0010]
A route guidance program according to the invention of claim 12 causes a computer to execute the route guidance method according to claim 11.
[0011]
A recording medium according to a thirteenth aspect of the present invention is a computer-readable recording medium in which the route guidance program according to the twelfth aspect is recorded.
[Brief description of the drawings]
[0012]
FIG. 1 is a block diagram showing a functional configuration of a portable route guidance device according to an embodiment of the present invention.
FIG. 2 is a plan view showing the direction of the apparatus main body.
FIG. 3 is an explanatory diagram showing a projection surface direction and a projection direction in the XZ plane.
[FIG. 4] FIG. 4 is an explanatory view showing a projection surface direction and a projection direction in the YZ plane.
FIG. 5 is a flowchart showing a route guidance processing procedure according to the embodiment of the present invention.
FIG. 6 is a block diagram showing a hardware configuration of the portable route guidance device.
FIG. 7 is an explanatory diagram showing an example of a guide image displayed on the projection surface.
FIG. 8 is an explanatory diagram showing an application example of the portable route guidance device.
[FIG. 9] FIG. 9 is an explanatory view showing a usage example of the portable route guidance apparatus shown in the application example of FIG.
FIG. 10 is a flowchart illustrating a route guidance processing procedure according to the embodiment.
Explanation of symbols
[0013]
100 Portable route guidance device
101 Search unit
102 Acquisition unit
103 Projection unit
104 Projection control unit
105 detector
106 Calculation unit
111 Emitter
112 Scanning unit
200 Device body
601 CPU
602 memory
603 Input key
604 display
605 I / F
606 Gyro
607 GPS receiver
608 Laser light source
609 2D scanner
610 Drive circuit
800 watches
801 clock
802 Projection port
803 dial
F direction of travel
G Projection surface
H user
L luminous flux
N guidance image
Sx Reference axis (main scanning direction)
Sy orthogonal axis (sub-scanning direction)
T Projection direction
V Projection plane direction
α Yaw angle
β pitch angle
γ roll angle
BEST MODE FOR CARRYING OUT THE INVENTION
[0014]
Exemplary embodiments of a portable route guidance device, a route guidance method, a route guidance program, and a recording medium according to the present invention will be explained below in detail with reference to the accompanying drawings. This portable route guidance device can be installed in mobile phones, watches, flashlights, portable radios, portable televisions, portable personal computers, PDAs, content players, etc. It can also be configured as a portable device.
[0015]
(Embodiment)
First, a functional configuration of a portable route guidance device according to an embodiment of the present invention will be described. FIG. 1 is a block diagram showing a functional configuration of a portable route guidance apparatus according to an embodiment of the present invention. In FIG. 1, the portable route guidance device 100 includes a search unit 101, an acquisition unit 102, a projection unit 103, a projection control unit 104, a detection unit 105, and a calculation unit 106.
[0016]
First, the search unit 101 searches for a guidance route to a destination point. Specifically, the search unit 101 can be realized by a known algorithm such as the Dijkstra method. That is, using the link length (link length) and the road type included in the road network information, a guidance route such as the shortest route and the shortest route is searched. Further, from the searched guidance route, it is possible to obtain the distance from the current point to the destination point, which will be described later, and the distance from the current point to the destination point. The destination point can be set by user operation input or genre designation. Further, the destination point may be not only the final target destination point but also a transit point represented by a node or a link shape complement point in the middle of the guide route.
[0017]
Moreover, the acquisition part 102 acquires the information regarding the present location of a moving body. The moving body is, for example, a user holding the apparatus main body or a vehicle (automobile, motorcycle, bicycle) on which the user is boarded. The acquisition unit 102 is, for example, a GPS receiver, and includes an antenna for receiving radio waves from GPS satellites, a tuner that demodulates received radio waves, an arithmetic circuit that calculates a current position based on the demodulated information, and the like. The Thereby, the acquisition part 102 can acquire the present location of a moving body by receiving the electromagnetic wave from a GPS satellite and calculating | requiring a geometric position with a GPS satellite. In addition, when the user cannot be received by the GPS receiver, such as when the user is in the facility, the acquisition unit 102 uses wireless LAN or Bluetooth to obtain information on the current location from the communication device installed in the facility. It can also be set as the structure which receives.
[0018]
Moreover, the projection part 103 projects a light beam on the projection surface outside a moving body. Here, assuming that the moving body is a user, specifically, the projection surface outside the moving body is, for example, a ground surface, a floor surface on which the user is moving (walking), or wall surfaces on both sides of the user. In the case of a facility, a ceiling surface is also included. Specifically, the projection unit 103 is, for example, a two-dimensional scanner including a light projecting unit 111 that outputs visible laser light and a scanning unit 112 that scans the visible laser light output from the light projecting unit 111. It is. Thereby, the visible laser beam scanned by the scanning unit 112 can be projected onto the projection surface as a light beam. In addition to the two-dimensional scanner, a projector may be used.
[0019]
In addition, the projection control unit 104 controls the projection unit 103 to display a guidance image regarding the traveling direction from the current point following the guidance route to the destination point based on the information regarding the current point acquired by the acquisition unit 102. Project the light flux. That is, the traveling direction is not a direction indicating the destination point from the current point, but a direction indicating a destination point that is traced on the route from the current point to the destination point. Specifically, this destination point corresponds to, for example, a transit point represented by a node of road network information or a link shape complement point.
[0020]
Further, the projection control unit 104 controls the projection unit 103 to form an arrow, a line, a circular figure, a polygon figure, or a figure obtained by combining these on the projection surface on which the light beam is projected. A guidance image can be displayed (drawn). Further, the length of the figure in the traveling direction can be set to a length corresponding to the distance from the current point to the destination point. For example, in a figure with a distance of 30 [m] and a figure with a distance of 50 [m], the figure with a distance of 50 [m] projects a light beam so that the length in the traveling direction is longer. .
[0021]
Further, the projection control unit 104 controls the projection unit 103 to thereby display a character string indicating the distance from the current point to the arrival point in the traveling direction on the projection surface on which the light beam is projected, or from the current point to the destination point. A guidance image including a character string indicating a distance can be displayed, and a guidance image including a graphic indicating a map near the current location can also be displayed.
[0022]
The detection unit 105 detects the direction of the main body of the portable route guidance device 100. Specifically, the direction in which the reference axis of the apparatus main body faces is detected. Here, as described above, the device body is a mobile phone, wristwatch, flashlight, portable radio, portable TV, portable personal computer, PDA, portable game in which the portable route guidance device 100 is incorporated. Or a portable device such as a content player, or a portable device dedicated to route guidance. Here, the direction of the apparatus main body will be described with reference to the drawings. FIG. 2 is a plan view showing the direction of the apparatus main body. In a three-dimensional space composed of an X axis, a Y axis, and a Z axis, the horizontal plane is the XY plane and the vertical axis is the Z axis.
[0023]
In FIG. 2, the reference axis Sx of the apparatus main body 200 is, for example, the main scanning direction of the two-dimensional scanner, and coincides with the X-axis direction when there is no deviation in the attitude of the apparatus main body 200. The axis Sy orthogonal to the reference axis Sx is the sub-scanning direction of the two-dimensional scanner, and coincides with the Y-axis direction when there is no deviation in the posture of the apparatus main body 200. The detection unit 105 detects the orientation of the reference axis of the apparatus main body 200 that changes its posture according to the movement of the moving body using a gyro.
[0024]
Specifically, the orientation of the reference axis Sx of the apparatus main body 200 in the three-dimensional space (XYZ space) is detected by integrating the angular velocity of the apparatus main body 200 obtained from the gyro. More specifically, the detection unit 105 detects a deviation of the reference axis Sx around the X axis (roll angle), a deviation around the Y axis (pitch angle), and a deviation around the Z axis (yaw angle). . In addition, the gyro includes a mechanical gyro, a vibration gyro, and an optical gyro. However, the portable route guidance device 100 requires portability and downsizing, and therefore a vibration gyro or an optical gyro is used. Is preferred.
[0025]
Further, the calculation unit 106 calculates an angle (calculation angle) between the traveling direction and the direction of the apparatus main body 200 detected by the detection unit 105. This calculated angle is a yaw angle α indicating a deviation of the reference axis Sx about the Z axis. In FIG. 2, when the traveling direction is F, when the reference axis Sx coincides with the X-axis direction, the light beam L is projected as it is onto the projection surface G, and a guidance image N indicating the traveling direction F is displayed on the projection surface G. The On the other hand, when the reference axis Sx is shifted from the X-axis direction around the Z-axis by the yaw angle α as shown by the alternate long and short dash line, when the light flux L is projected onto the projection surface G by applying the rotation correction by the yaw angle α. When the yaw angle α is not shifted, it is possible to display the guidance video N that is in the same direction as the traveling direction F indicated.
[0026]
The detection unit 105 detects the direction of the projection surface G from the apparatus main body 200 and the projection direction of the light beam L. Here, the direction of the projection surface G (projection surface direction) and the projection direction will be described with reference to the drawings. 3 and 4 are explanatory diagrams showing the projection plane direction and the projection direction. 3 and 4, the direction of the projection surface G (projection surface direction) V indicates the vertical direction, that is, the downward direction of the Z axis. That is, the projection plane direction V always indicates the vertical direction regardless of the posture of the apparatus main body 200.
[0027]
The projection direction T is a predetermined direction based on the main scanning direction (reference axis Sx) of the two-dimensional scanner, and changes as the reference axis Sx changes. Therefore, the projection direction T is automatically specified by detecting the direction of the reference axis Sx. Here, the projection direction T coincides with the projection plane direction V when the reference axis Sx of the apparatus main body 200 coincides with the X-axis direction.
[0028]
In this case, the calculation unit 106 calculates the angle between the projection plane direction V and the projection direction T. The calculated angle is a pitch angle β (see FIG. 3) indicating a deviation of the reference axis Sx around the Y axis or a roll angle γ (see FIG. 4) showing a deviation of the reference axis Sx around the X axis. And the projection control part 104 controls the projection of the light beam L based on pitch angle (beta) (or roll angle (gamma)) which is this calculation angle. Specifically, when the pitch angle β (or roll angle γ) is within a predetermined range, the light beam L is projected, and when the pitch angle β (or roll angle γ) is out of the predetermined range, the projection of the light beam L is stopped. This predetermined range can be arbitrarily set. The pitch angle β and the roll angle γ are set to different ranges.
[0029]
That is, when the pitch angle β (or roll angle γ) is out of the predetermined range, the light flux L is not projected onto the projection surface G such as the ground surface or the floor surface, but directly projected onto a person in front, side, or above the user. It will be. Therefore, safety can be improved by automatically stopping projection without the user being aware of it. Note that when the projection on the wall surface is taken into account, the change in the roll angle γ may be ignored.
[0030]
Next, a route guidance processing procedure according to the embodiment of the present invention will be described. FIG. 5 is a flowchart showing a route guidance processing procedure according to the embodiment of the present invention. In FIG. 5, first, the search unit 101 searches for a guidance route (step S501), and the acquisition unit 102 acquires current location information (step S502). Next, direction detection is performed by the detection unit 105 (step S503). Specifically, the direction in which the reference axis Sx of the apparatus main body 200 faces, the projection surface direction V, and the projection direction T are detected. Then, the angle is calculated by the calculation unit 106 (step S504). Specifically, a yaw angle α indicating a deviation of the reference axis Sx from the X-axis direction, a pitch angle β and a roll angle γ that are angles between the projection surface direction V and the projection direction T are calculated.
[0031]
Thereafter, the projection control unit 104 determines whether or not the angle between the projection plane direction V and the projection direction T is within a predetermined range (step S505). That is, it is determined whether or not the pitch angle β and the roll angle γ are within a predetermined range. If it is within the predetermined range (step S505: Yes), the light beam L is projected onto the projection surface G (step S506). On the other hand, when it is outside the predetermined range (step S505: No), the projection of the light beam L is stopped (step S507). Note that the roll angle γ may be ignored when irradiation to a side surface such as a wall surface is allowed.
[0032]
As described above, in this embodiment, it is possible to always display the guide image N having the same traveling direction F and the same direction of the character string on the projection plane G regardless of how the posture of the apparatus main body 200 changes. Accurate guidance can be performed.
[0033]
In addition, the user who has the portable route guidance device 100 at the current location needs to check whether the user is moving according to the guidance direction on the map by comparing the map on the display screen with the actual scene at the current location. In addition, by visually recognizing only the guide image N projected on the projection surface G, the traveling direction F can be easily and intuitively grasped. In particular, emergency evacuation guidance can be performed when instantaneous judgment is required, such as during a disaster.
[0034]
Even if the portable route guidance device 100 does not have a display screen, the traveling direction F or a map in the vicinity thereof can be displayed on the projection surface G. Accordingly, the route guidance can be performed by applying to a portable terminal such as a portable radio, a flashlight, or a music player that has no display screen or has a very small display screen. If the display screen is not desired to be lit even when it has a display screen, such as when the remaining battery level is low, a light flux L is projected onto the projection surface G to display a guide image N. You can guide the route with your heart.
【Example】
[0035]
Next, an example of the portable route guidance apparatus 100 according to the above-described embodiment will be described. First, the hardware configuration of the portable route guidance device 100 described above will be described. FIG. 6 is a block diagram illustrating a hardware configuration of the portable route guidance device 100. In FIG. 6, the portable route guidance apparatus 100 includes a CPU 601, a memory 602, an input key 603, a display 604, an I / F 605, a gyro 606, a GPS receiver 607, a laser light source 608, and a two-dimensional view. It comprises a scanner 609 and a drive circuit 610. Each component 601 to 610 is connected to the bus 600.
[0036]
Here, the CPU 601 governs overall control of the portable route guidance device 100. The memory 602 is composed of a recording medium such as a ROM, a RAM, an HD, and a flash memory, and stores various programs. The memory 602 is used as a work area for the CPU 601. An input key 603 is an operation button for inputting characters, numerical values, various instructions, and the like.
[0037]
The display 604 displays icons, cursors, menus, windows, or various data such as characters and images. As the display 604, for example, a CRT, a TFT liquid crystal display, a plasma display, or the like can be adopted.
[0038]
The I / F 605 is connected to a network wirelessly or via a communication cable, and functions as an interface between the network and the CPU 601. The network includes a LAN (including a wireless LAN), a WAN, a public line network, a mobile phone network, and the like. Further, Bluetooth can be applied as the I / F 605.
[0039]
The gyro 606 is a sensor that measures the rotational angular velocity of the apparatus main body 200. By integrating this rotational angular velocity, the direction of the apparatus main body 200 in the three-dimensional space can be output. The gyro 606 includes a mechanical gyro, a vibration gyro, and an optical gyro. However, since the portable route guidance device 100 is required to be portable and downsized, a vibration gyro or an optical gyro is used. preferable.
[0040]
The GPS receiver 607 includes an antenna for receiving radio waves from GPS satellites, a tuner that demodulates the received radio waves, an arithmetic circuit that calculates a current position based on the demodulated information, and the like. The current location of the moving object can be acquired by receiving and obtaining the geometric position with the GPS satellite.
[0041]
The laser light source 608 is a semiconductor laser light source that emits visible laser light from the drive circuit 610. The irradiated visible laser light is two-dimensionally scanned by the two-dimensional scanner 609 and projected onto the projection surface G. In addition, the two-dimensional scanner 609 causes the drive circuit 610 to emit visible laser light from the laser light source 608 in the main scanning direction (hereinafter referred to as main scanning direction Sx) that is the direction of the reference axis Sx shown in FIGS. Then, scanning is performed in the sub-scanning direction (hereinafter referred to as sub-scanning direction Sy) which is the direction of the axis Sy orthogonal to the reference axis Sx.
[0042]
Specifically, for example, a scanner such as a polygon scanner, a galvano scanner, and a resonant scanner can be employed for the two-dimensional scanner 609 for each of the scanning directions Sx and Sy. Each scanner projects the visible laser beam linearly or in a sine wave form. The guide image N can be freely drawn on the projection surface G by the two-dimensional scanner 609 formed by a combination of the two scanners in the scanning directions Sx and Sy.
[0043]
The drive circuit 610 drives the laser light source 608 and the two-dimensional scanner 609 by giving a drive signal to the laser light source 608 and the two-dimensional scanner 609 based on a command from the CPU 601. Specifically, the laser light source 608 is given a drive signal related to the drive timing, switching frequency, and output duty of visible laser light.
[0044]
For the two-dimensional scanner 609, a drive signal relating to mirror rotation speed control, rotation start, and supply voltage is given to each scanner constituting the two-dimensional scanner 609. In particular, these drive signals for each scanner are given in response to commands from the CPU 601 regarding the direction of the apparatus main body 200, the distance from the current location to the arrival location, and the like. The drive circuit 610 emits visible laser light from the laser light source 608, the visible laser light is two-dimensionally scanned by the two-dimensional scanner 609, and the two-dimensionally scanned visible laser light is projected onto the projection surface G. Thereby, a desired guide image N can be displayed on the projection surface G. Note that a projector may be used instead of the laser light source 608 and the two-dimensional scanner 609 described above.
[0045]
Note that the search unit 101, the acquisition unit 102, the projection control unit 104, the detection unit 105, and the calculation unit 106 illustrated in FIG. 1 specifically include, for example, a program recorded in the memory 602 illustrated in FIG. The function is realized by the CPU 601 executing. Further, the projection unit 103 realizes its functions by the laser light source 608, the two-dimensional scanner 609 and the drive circuit 610 shown in FIG. 6, or by the projector and the drive circuit 610.
[0046]
Next, an example of the guidance image N displayed on the projection surface G will be described. FIG. 7 is an explanatory diagram illustrating an example of the guide image N displayed on the projection surface G. In FIG. 7, graphics N <b> 1 to N <b> 6 that are guide images N represent arrows indicating the traveling direction F. In the figures N1 to N6, the length in the main scanning direction Sx represents the length from the current point to the arrival point. Further, a character string “10 m” indicating the distance from the current location to the arrival location can be displayed as in the figures N5 and N6. In addition to the arrow graphic N6a, a map graphic N6b may be displayed as in the graphic N6. Here, this map figure N6b represents a crossroad.
[0047]
Next, an application example of the portable route guidance device 100 described above will be described. FIG. 8 is an explanatory diagram showing an application example of the portable route guidance device 100. FIG. 8 shows a case where the portable route guidance device 100 is applied to a wristwatch 800. The portable route guidance device 100 is built in a wristwatch 800. A projection port 802 is formed in the watch unit 801 of the wristwatch 800, and a luminous flux L of visible laser light is projected from the projection port 802. The dial 803 of the clock unit 801 may display a distance from the current location to the arrival location (indicated as “20 m” in FIG. 8).
[0048]
Next, a usage example of the portable route guidance apparatus 100 shown in the application example of FIG. 8 will be described. FIG. 9 is an explanatory diagram showing an example of use of the portable route guidance device 100 shown in the application example of FIG. In FIG. 9, a luminous flux L of visible laser light is projected onto the projection surface G from a wrist watch 800 worn on the left hand of the user H, and a guidance image N is displayed. From this state, when the user H twists his left arm 90 degrees as indicated by the alternate long and short dash line, the posture of the wristwatch 800 also changes 90 degrees with the posture change of the left arm, and the dial 803 of the wristwatch 800 appears in front of the user H. Even in this case, the same guidance image N as shown by the solid line can be displayed on the projection surface G. In FIG. 9, the case where the wristwatch 800 is worn on the left hand has been described. However, by setting whether the hand to be worn is the right hand or the left hand in advance, calibration is performed so that irradiation is always performed in front of the body. You can also
[0049]
Next, a route guidance processing procedure according to this embodiment will be described. FIG. 10 is a flowchart showing a route guidance processing procedure according to this embodiment. In FIG. 10, first, the starting point and the destination point are input from the input key 603 to search for a guidance route (step S1001), and the GPS receiver 607 is used to acquire current point information (step S1002). .
[0050]
Then, it is determined whether or not the current location is off the guidance route (step S1003). If the current point is off the guide route (step S1003: Yes), the process proceeds to step S1001, and the guide route is searched again, that is, rerouted. On the other hand, if the current location is not off the guidance route (step S1003: No), that is, if the current location is on the guidance route, direction detection is performed (step S1004). Specifically, the direction of the apparatus main body 200 (direction of the reference axis Sx in the three-dimensional space), the projection plane direction V, and the projection direction T are detected.
[0051]
Next, angle calculation is performed (step S1005). Specifically, a yaw angle α indicating a shift around the Z axis of the apparatus body 200, a pitch angle β indicating a shift around the Y axis, and a roll angle γ indicating a shift around the X axis are calculated. The yaw angle α represents the horizontal displacement of the apparatus main body 200, and the pitch angle β and the roll angle γ represent the angle between the projection surface direction V and the projection direction T. Then, it is determined whether or not the pitch angle β (or / and the roll angle γ) is within a predetermined range (step S1006).
[0052]
When it is not within the predetermined range (step S1006: No), the process proceeds to step S1003, and the projection of the light beam L is stopped by determining whether or not the current point is off the guide route. As a result, it is possible to prevent a risk that the light beam L is accidentally projected horizontally or upward onto the eyes of others. On the other hand, when it is within the predetermined range (step S1006: Yes), it is determined that the light beam L is not projected onto the eyes of others, and the distance to the arrival point is calculated (step S1007).
[0053]
Then, based on the data relating to the direction detected in step S1004 and the distance calculated in step S1007, scanning data relating to the guide video N is set (step S1008). Specifically, the scan data is, for example, character string information such as the shape of a graphic displayed on the projection surface G, the scan amplitude of an arrow, and the distance. This scan data is given to the drive circuit 610.
[0054]
The drive circuit 610 sets the drive signal of the two-dimensional scanner 609 when given the above-described scan data (step S1009), and applies a voltage corresponding to the scan data to the two-dimensional scanner 609, thereby causing the projection plane G A light beam L is projected onto the screen (step S1010). As a result, the same guidance image N can be displayed on the projection surface G regardless of the posture of the apparatus main body 200. If the power supply or route guidance is turned off (step S1011: Yes), a series of processing ends. On the other hand, when ON is maintained (step S1011: No), it transfers to step S1003.
[0055]
As described above, according to the portable route guidance device 100, the route guidance method, the route guidance program, and the recording medium, the direction indicating the traveling direction F regardless of the direction of the device main body 200 (direction of the reference axis Sx). Can be displayed on the projection surface G outside the moving body.
[0056]
In the conventional route guidance device, when there are a plurality of confusing directions F such as 5 roads or complicated roads with several right turn roads on the screen, conversely, in squares or parks In order to give directions on where the road should be walked, it is difficult to have a correspondence between the screen and the actual direction, and accurate instructions are impossible.
[0057]
On the other hand, in the present embodiment and example, since a character string such as a distance to the arrival point is also projected, it can be said that the character string is displayed in the same direction as the direction indicating the traveling direction F. Thereby, the advancing direction F and distance can be recognized simultaneously and intuitively. In this manner, the direction of the character string and the traveling direction F correspond to each other, so that the traveling direction F can be easily determined.
[0058]
Also, in the configuration for displaying on the display screen of a mobile terminal such as a conventional mobile phone or PDA, the direction of the character string is shown corresponding to the direction of the display screen, so the direction of the character string is the direction of travel such as an arrow. If you try to match the direction pointing to F, you must rotate the mobile terminal body, and naturally the direction is displayed only with arrows, and the direction of character information etc. does not correspond to the direction of travel F. First, it is necessary to confirm the traveling direction F using only arrows.
[0059]
After that, when the body is rotated in the traveling direction F, the same operation can be obtained unless the body of the user H is rotated while the direction of the apparatus main body 200 is maintained. Can not. Moreover, even in this way, it is difficult to instantaneously determine a complicated direction.
[0060]
On the other hand, in the present embodiment and examples, since the traveling direction F is directly indicated on the projection surface G such as the ground, floor, wall surface, ceiling surface, etc., the traveling direction F is visually recognized easily and intuitively. be able to. Therefore, the user H can be accurately guided according to the traveling direction F.
[0061]
The current location information is acquired using the GPS receiver 607, but the current location information may be received from a communication device installed in the facility. Specifically, when conducting evacuation guidance in a facility such as a school, department store, office building, station, condominium, hotel, etc., current location information is received from the communication equipment in the facility via wireless LAN or Bluetooth. In addition, it is possible to project a light beam L on the floor, wall, and ceiling so as to display a guidance image N indicating a traveling direction F that follows the guidance route to the evacuation exit, which is the destination, so that an emergency such as a disaster can occur. Even at times, it is possible to easily and intuitively indicate the traveling direction F and accurately guide the user H to the evacuation exit.
[0062]
Further, in the above-described embodiment and example, since it is not necessary to display on the display screen, even if only the user H has the portable route guidance device 100, the user H is moving with the other. Since the person can grasp the traveling direction F only by visually recognizing the guidance image N displayed on the projection surface G such as the ground without looking into the display screen of the portable route guidance device 100, the group behavior It is also effective when
[0063]
Note that the route guidance methods described in the present embodiment and examples can be realized by executing a prepared program on a computer such as a personal computer or a workstation. This program is recorded on a computer-readable recording medium such as a hard disk, a flexible disk, a CD-ROM, an MO, and a DVD, and is executed by being read from the recording medium by the computer. The program may be a transmission medium that can be distributed via a network such as the Internet.

Claims (13)

In the portable route guidance device that performs route guidance to the destination point,
An acquisition means for acquiring information on the current location of the moving object;
Projecting means for projecting the visible laser light as a light beam onto a projection surface outside the moving body by scanning the visible laser light,
The luminous flux is controlled so as to display a guidance image relating to a traveling direction from the current location following the guidance route to the destination location based on information relating to the current location obtained by the obtaining means by controlling the projection means. Projection control means for projecting,
Detecting means for detecting a direction of the projection surface from the apparatus main body and a projection direction of the light flux;
Calculating means for calculating an angle between the traveling direction and the direction of the projection surface detected by the detection means and the projection direction of the luminous flux;
The projection control means includes
A portable route guidance apparatus that projects the light flux based on an angle between a direction of the projection plane calculated by the calculation means and a projection direction of the light flux . The projection control means includes
2. The light beam according to claim 1, wherein the light beam is projected so that the guide image is an arrow, a line, a circular figure, a polygon figure, or a figure obtained by combining these, indicating the traveling direction. Portable route guidance device. The projection control means includes
The portable route guidance device according to claim 2, wherein the luminous flux is projected such that the length of the figure in the traveling direction is a length corresponding to a distance to the arrival point in the traveling direction. . The projection control means includes
The said light beam is projected so that the said guidance image | video may become a character string which shows the distance from the said present location to the arrival point of the said advancing direction, The one of Claims 1-3 characterized by the above-mentioned. Portable route guidance device. The projection control means includes
The portable route guidance device according to claim 1, wherein the light flux is projected so that the guidance image is a character string indicating a distance from the current location to the destination location. The projection control means includes
The portable route guidance device according to claim 1, wherein the light flux is projected so that the guidance image becomes a graphic showing a map near the current location. The projection means includes
A light projecting means for outputting visible laser light; and a scanning means for scanning the visible laser light output from the light projecting means, and the visible laser light scanned by the scanning means as the light flux. The portable route guidance device according to claim 1, wherein the portable route guidance device projects on a projection surface.   The portable route guidance device according to claim 1, wherein the projection unit is a projector.   The portable route guidance device according to claim 1, wherein the acquisition unit is a GPS receiver.   The portable route guidance apparatus according to claim 1, wherein the acquisition unit is a receiver that receives information on the current location from a communication device installed in a facility. In the route guidance method of the portable route guidance device that performs route guidance to the destination point,
  An acquisition process for acquiring information on the current location of the moving object;
  A projection step of projecting the visible laser light as a light beam onto a projection surface outside the moving body by scanning the visible laser light,
  The light flux is controlled so as to display a guidance image relating to a traveling direction from the current location following the guidance route to the destination location based on information on the current location acquired by the acquisition step by controlling projection means. A projection control process for projecting;
  A detection step of detecting the direction of the projection surface from the apparatus main body and the projection direction of the luminous flux;
  A calculation step of calculating an angle between the traveling direction and the direction of the projection surface detected by the detection step and the projection direction of the light flux,
  In the projection control step,
  A route guidance method, wherein the light beam is projected based on an angle between a direction of the projection surface calculated by the calculation step and a projection direction of the light beam. A route guidance program for causing a computer to execute the route guidance method according to claim 11. A computer-readable recording medium on which the route guidance program according to claim 12 is recorded.

Images