JP2001091288A - Portable route guidance device and route input method - Google Patents

Abstract

(57) [Summary] [Problem] To provide a portable route guidance apparatus and a route input method that can easily input and set a fine route to a destination, and can perform route guidance along the set route. SOLUTION: Portable route guidance device 100 (100 ')
Has a two-dimensional input unit provided with a ball-shaped rotating body 1 'as shown in FIG. The two-dimensional input unit detects the rotation direction and distance of the rotator 1 'that moves back and forth and right and left while rotating by urging, and sends a detection signal to the CPU. After the user decides on the scale, the place of departure (or
Trace from the current location) to the destination by the rotator 1 'according to the normal route, detect the distance and direction of the taxiway that constitutes the entire route to the destination, calculate the distance and direction between each node, and calculate the route The route is stored in a table, the set route is displayed, and the route is calculated based on the GPS data received by the GPG receiver in the route guidance mode, and the current position is displayed together with the route on the screen as a guidance guide.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to route guidance technology, and more particularly, to a portable route guidance device and a route input method.

[0002]

2. Description of the Related Art As a route guidance technology, a route (guide route) from a current position of a car to a destination is displayed on a screen together with a map and used for driving assistance of a driver. Searches and calculates taxiways based on a database created by quantifying and estimates the obtained taxiways from self-contained navigation using gyroscopes and vehicle speed pulses and radio navigation using positioning information from GPS satellites There is a car navigation device based on a route guidance technology of a vehicle that displays a route on a screen while performing map matching with the determined vehicle position.

A current position measurement function for measuring and displaying a current position (self-position) based on positioning information from a GPS satellite, and a destination (latitude and longitude) are set so that the direction to the destination is set. There is a GPS built-in clock equipped with a "navigation" function for displaying the distance and the distance graphically.

[0004]

In the above GPS built-in clock, the destination of the GPS built-in clock is set in advance. The owner of the GPS built-in clock is located in an outdoor scene such as mountain climbing or fishing, and the distance to the destination. You can check the direction.

[0005] However, in order to perform route guidance along the route to the current position and the destination, the departure point and the destination and the position information (longitude) of each node (node (intersection, curve, mark, etc.)) therebetween. , Latitude) must be picked up from a paper map and set along the route. However, with a GPS built-in clock with a limited physical size, a limited number of button operations are combined at setting to set the route and latitude. Because it must be set, it is troublesome to set multiple nodes (latitude, longitude) along the route by button operation, not only for the departure place and destination, but also easy to make mistakes. Was.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and a portable route capable of easily inputting and setting a fine route to a destination and performing route guidance along the set route. An object of the present invention is to provide a guidance device and a route input method.

[0007]

In order to solve the above-mentioned problems, a portable route guidance apparatus according to a first aspect of the present invention receives a display unit and positioning information sent from a satellite, and receives the positioning information based on the positioning information. Positioning means for calculating a self-position, map route information obtaining means for reading a route on an external map to obtain route information, route information storing means for storing the route information obtained by the map route information obtaining means, Display control means for superimposing and displaying the self-position obtained by the positioning means on the display unit together with the soil for displaying the route on the display unit based on the route information stored in the route information storage means. Features.

According to a second aspect of the present invention, in the portable route guidance device according to the first aspect, the map route information input means includes a rotator protruding from the device main body and rotatably formed; Distance measurement means for measuring a movement distance when the body is urged upward and rotation direction detection means for detecting a rotation direction when the rotating body is urged and rotated on a route on a map; It is characterized by having.

According to a third aspect of the present invention, in the portable route guidance device according to the first aspect, the map route information input means accommodates a rotatable rotator and is configured to be freely connectable to the device body. A map route input unit, a distance measuring means for measuring a moving distance when the rotating body is urged on the map and moves, and a rotation when the rotating body is urged and rotated on a route on the map. Rotation direction detecting means for detecting a direction.

According to a fourth aspect of the present invention, there is provided the portable route guidance apparatus according to the first aspect, wherein the display control means calculates a distance between the self-position and the route displayed together with the route on the display section; In addition, when the distance between the self-position and the route calculated by the separation distance calculating means is larger than a predetermined distance, a notifying means for notifying the distance is provided.

A route input method according to a fifth aspect of the present invention is a portable electronic device which receives positioning information sent from a satellite and calculates a self-position based on the positioning information, the starting information described on an external map. Enter the location of the ground, trace the route from the starting point to the destination on the external map, and detect the distance between the previous turn and the current turn for each turn detected at the time of tracing Then, from the detected turning angle, calculate the distance between the previous turning angle and the azimuth of a straight line connecting the current turning angle, and save it in the memory,
The present invention is characterized in that the coordinate value of the current turning angle is calculated from the distance and the azimuth and stored in a memory, and the operation is repeated until the above tracing is completed.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS [Example of Circuit Configuration] FIG. 1 is a block diagram showing the configuration of an embodiment of a portable route guidance device according to the present invention, which can be mounted on a user's arm as shown in FIG. A wristwatch-type device that also serves as a wristwatch (hereinafter referred to as a wristwatch-type navigator)
Is taken as an example.

The wristwatch type navigator 100 has a two-dimensional input unit 1, a GPS antenna 2, a GPS processing unit 3, a CPU 4, a display unit 5, a power supply circuit 6, a RAM 7, a ROM 8, a switch (Sw) input unit, a satellite data storage unit 10, A notification unit (buzzer) 11 is provided. Further, a configuration may be adopted in which a plurality of route table areas are secured and a route registration memory 14 capable of registering a plurality of routes in advance is provided.

As shown in FIG. 2, the two-dimensional input unit 1 includes a ball-shaped rotator 1 '. Direction and distance), and outputs the detection signal to the CPU.
4. The two-dimensional input unit 1 is automatically turned on when the urging force applied to the rotating body 1 exceeds a predetermined value, and turned off when the urging force applied to the rotating body 1 ′ becomes equal to or less than a predetermined value. Built-in.
The two-dimensional input unit 1 has a rotation direction detection unit that detects the rotation direction and a distance counter that measures the distance. Therefore, when the user determines the scale and traces the map (such as an atlas) from the starting point (or the current position) to the destination with the rotating body 1 ′ according to the route, the guidance route that constitutes the entire route to the destination It is possible to obtain distance data and azimuth data of 41, 42, 43,... (FIG. 4).

The GPS processing unit 3 includes an RF, an A / D, a data register, a counter, a decoder, and a control unit (microcomputer) for controlling them. The GPS processing unit 3 amplifies and demodulates the radio waves received from the GPS satellites received by the GPS antenna 2,
The obtained satellite data is decoded, and position measurement such as self-position calculation of the wristwatch-type navigator 100 is performed based on the decoded data. The measurement result by the GPS processing unit 3 is sent to the CPU 4 that controls the entire wristwatch-type navigator 100.

The current time sent to the CPU 4 from the clock unit (not shown) is displayed on the liquid crystal screen (LCD) of the display unit 5 during the setting of the normal clock mode. In the GPS mode, the self-position measured by the GPS processing unit 3, that is, latitude and longitude is displayed. In the route setting mode, the departure point, the destination, and the route acquired by the two-dimensional input unit 1 are displayed (if the route cannot be displayed on the screen, it is displayed while scrolling left and right or back and forth). In addition, at the time of route guidance (route guidance mode), a guidance guide (guidance mark), a departure place, a guidance route, and a destination are displayed.

The CPU 4 operates based on the program stored in the ROM 8 while using the RAM 7 as a working memory, and controls the operation of the entire wristwatch-type navigator 100 and each component. The RAM 7 has a CP
Various data are stored in the control of U4.

The CPU 4 has a two-dimensional input unit 1 and a GP.
In addition to the S processing unit 3, the display unit 5, and the power supply circuit 6, a plurality of switches for a user to perform a display switching operation, an instruction input, or a data input in a clock mode, a GPS mode, a route setting mode, and a route guidance mode are connected. The connected switch input unit 9, the satellite data storage unit 10, and the notification unit 11 are connected. Further, a storage table storage memory 14 for storing a plurality of routes set in the route setting mode may be provided.

The satellite data storage unit 10 includes a GPS processing unit 3
Is a readable and writable memory such as an SRAM for storing satellite data which is read or updated by the CPU. The notifying unit 11 includes a warning sound generating device such as a buzzer, and notifies the user of the start of route guidance (navigation) or when the current position is too far from the guidance route (when the timer is set in the clock mode). The buzzer sound at the time of arrival is output by changing the length and strength or strength).

The route table storage memory 14 is a storage memory, and is provided when the wristwatch-type navigator 100 is configured to store a plurality of routes or routes that are used repeatedly (FIG. 3).

[Example of Appearance of Apparatus] FIG. 2 is a view showing the appearance (top view) of the wrist watch type navigator 100, and FIG.
FIG. 2B shows an example in which the two-dimensional input unit 1 is provided in the apparatus main body, and FIG. 2B shows an example in which the two-dimensional input unit 1 is configured to be connectable to the main body with a cable.

In FIG. 2A, a GPS antenna 2, a GPS processing unit 3, an LCD screen 5 'of a display unit 5, and operation switches 9 (switches A to E) are arranged on the upper surface of the main body of the wristwatch type navigator 100. I have. A rotating body 1 'of the two-dimensional input unit 1 is rotatably provided on one of the side parts (2).
Although the dimension input unit 1 is housed inside the device in this example, it may be projected to the side. Further, in this example, the size of the rotating body 1 'is displayed to be slightly larger, but in practice, the rotating body 1' has a small ball shape so as to accurately trace the route on the map. In addition,
A cylindrical neck portion accommodating the two-dimensional input portion may be provided on a side portion, and a rotating body 1 'having a size about the size of a ball-point pen may be provided at the tip. Reference numeral 18 denotes a watch band for supporting the wristwatch-type navigator 100 on the wrist of the user.

The wristwatch-type navigator 100 'shown in FIG. 2 (b) has a cable connection terminal 15 on the side of the main body and a structure relating to the two-dimensional input section 1 and the rotating body 1'. Are the same as those in FIG.

The two-dimensional input unit 1 "has a pen-like shape having a terminal portion 103 fitted to the connection terminal portion 15 at one end of the cable 102, and a rotating body 1 'is provided at the end thereof. In this example, the watch-type navigator 10
0 ′ is normally used with the two-dimensional input unit 1 ″ removed, and the user can use the two-dimensional input unit 1 ″ by connecting it to the connection terminal unit 15 of the main body when setting a route. Also,
In this case, input (trace) to the rod-shaped two-dimensional input unit 1 "
Operation switches for starting and ending confirmation may be provided.

[Route Table] FIG. 3 shows the configuration of an embodiment of a route table for registering a guide route and a node created based on the route input by the two-dimensional input unit 1, 1 "in the route setting mode. In Fig. 3, the route table 30 includes a guide route column 31 for storing the numbers of the guide routes constituting the route as shown in Fig. 4, and the coordinates of each node (the departure point and the target are also assumed to be temporary nodes). It has a coordinate column 32 for storing (latitude and longitude), a distance column 33 for storing the distance between each node (= the length of the guide route), and an azimuth column 34 for storing the azimuth of each guide route.

The route table 30 stores R in the route setting mode.
Secured in AM7. Then, as shown in FIG. 6, the CPU 4 calculates the distance data (signal) and the rotation direction data (angle data signal) of each guide path which are input by operating the two-dimensional input unit 1 and transmitted to the CPU 4. The coordinates (latitude, longitude) of each node and the distance and direction of each taxiway are registered (FIG. 7).

In the following description, one path is defined as a RAM.
7 is described as an example, but a plurality of route tables may be secured in the RAM 7 in the route setting mode so that a plurality of routes can be set.

The wristwatch-type navigator 100 may be provided with a route table storage memory (storage memory) 14 so that a plurality of routes can be set in advance in the plurality of route tables (in the route setting mode). In this case, a repetitive route table can be used.

The route table is not limited to the example shown in FIG. 3 (for example, the data input from the two-dimensional input unit 1 is directly processed (or processed), the starting point, each node (turning angle), and the destination value are arranged in this order. A number may be stored.

[Route, Node, and Guide Route] FIG. 4 is an explanatory diagram of the route, the node, and the guide route. As shown in FIG. 4, when the route from the departure point S to the destination F is a route 40, the route 40 is the sum of the guidance routes 41 to 45 connecting the start point S, the nodes 2 to 5, and the destination F. A node is a node connecting adjacent guidance routes and is generally a corner or an intersection. In the embodiment, a node having a corner detected by the two-dimensional input unit is used as a node.

The guide routes 41 to 45 in the guide route column 31 of the route table 30 in FIG. 3 are examples of the route 40 in FIG. 4, and (X1, Y1), (X2,
Y2),... (X6, Y6) are the latitude and longitude of nodes 1 to F (where node 1 is the start (departure) and node F is the end (destination)). Also, d1 of the distance column 33
To d5 is the length of the guidance route, Σdi = D (route 40
Length). Θ1 to θ5 in the azimuth column 34 are angles (relative azimuths) formed by the guidance routes 41 to 45 at the nodes 1 to 5.
(Accordingly, the relative orientation of the guidance route 41 is 0).

That is, after the scale and the latitude and longitude of the departure point S (= node 1) are set, the route 40 on the map is set.
Is traced by the two-dimensional input unit 1 of the wristwatch-type navigator 100, the coordinates are acquired every time the turning angle (nodes 2 to 5) is detected, the distance and the direction are determined, and stored in each column of the route table in FIG. Is done. Although the map coordinate system does not match the GPS coordinate system, the GPS coordinate system can be made to match the map coordinate system (or the map coordinate system can be made to match the GPS coordinate system) by predetermined coordinate conversion. The latitude and longitude stored in the coordinate field 32 (or 32 ′) may be the latitude and longitude of the node detected by the two-dimensional input unit 1 (that is, the latitude and longitude obtained from the map) (converted to the GPS coordinate system and stored). May be performed).

[Example of Route and Guide Display During Route Guidance] FIG. 5 is a diagram showing an embodiment of a route and a guide displayed during route guidance. In the route guidance mode, the watch-type navigator 100 receives data from a GPS satellite and calculates its own position (current position (latitude, longitude)) based on the data. When the user carries the clock-type navigator 100 from the departure place S to the destination F, and the current position and the departure place match, the clock-type navigator 100 is calculated on the LCD screen of the display unit 5 based on the route data of FIG. Route 40 is displayed (FIG. 9). Further, the calculated current position is indicated by the guidance guide 5.
1 is displayed on the LCD screen 50.

Here, FIG. 5A shows a case where the self-position is on the route 40 (in this example, on the guideway 43), and the guide 51 is superimposed on the current guideway (43). . Thus, when the user is on the route 40 (or is very close to the route), the user is guided toward the next turn according to the displayed guidance route 43.

FIG. 5B shows a case where the self-position deviates from the route 40. In this case, a guidance guide 51 'is displayed at a position deviating from the route 40. In this case, the buzzer 11 is activated and a warning sound is issued. In addition, the coordinates of the current position are displayed, a perpendicular L is drawn on the nearest taxiway (43), the length (distance) of the perpendicular L is displayed, and guidance is made to return to the taxiway 43. This allows the user to
It is possible to return to the route 43 while confirming the position with the azimuth pointer 55 displayed at the upper right of the D screen. FIG.
In the examples of (a) and (b), the route is displayed with north as the upper side. However, in a device such as a wristwatch-type navigator that attaches to a user's arm or waist with a belt or the like, as shown in FIG. In the example shown in FIG. 5 (c), the inclination of the entire route is adjusted so that the traveling direction is directed upward (following the change in traveling direction). Adjustment (display coordinate conversion)) is performed, and in this case, the inclination of the azimuth indicator 55 also changes following the traveling direction.

[Operation of Detecting Distance and Orientation of Route Input Unit] FIG. 6 is a diagram showing one embodiment of the operation of detecting the distance and azimuth when setting a route by the route input unit 1.

Step S1: (Input of Latitude and Longitude of Departure Point S) After the scale input of step T2 in FIG. 7 is performed in the route setting mode, the user sets the departure point S as shown in FIG. When the latitude and longitude are input by operating the switches of the switch input unit 9, the switch input unit 9 sends a signal (coordinate (latitude and longitude) data signal) to the CPU 4. In the embodiment, a digit is set by the switch D, and a numerical value is inputted by the switches B and C. Confirmation of input data displayed as shown in FIG. 8C is performed by a confirmation key (switch E in the embodiment).
The operation is carried out.

When the vehicle departs from the current location, the operation switch of the switch input unit 9 is operated to set “current position = departure location”. Receives data from satellites, performs position measurement such as self-position calculation, etc.
Send to U4.

Step S2: (Reset of distance counter) When the input confirmation of the latitude and longitude of the departure place S is completed, the two-dimensional input unit 1 resets the distance counter to 0.

Step S3: (Map Route Input Operation and Data Acquisition) After displaying the route input guide (FIG. 8 (d)), the user can enter a route on the map (not necessarily a road, for example, along a river, a ridge). The route may be input along the terrain such as along the road).
When the tracing is performed while pressing and pressing and rotating, the two-dimensional input unit 1 outputs the rotation direction data and the rotation angle λ.
(Unit: radians)

Step S4 (input end determination) The two-dimensional input unit 1 checks the urging force on the rotating body 1 ', and when the urging force becomes 0 (zero), determines that the tracing to the destination F has ended and ends the processing. It transits to S8 to perform.

Step S5: (Determination of Rotation Direction Change) The two-dimensional input unit 1 determines whether the rotation direction of the rotating body 1 'has changed or not by determining the previous rotation direction δ and the current rotation direction δ'. When | δ−δ ′ |> ε, it is determined that the rotation direction has changed, and the process proceeds to S7.

Step S6: (Counting of distance) If | δ−δ ′ | ≦ ε in step S6, the two-dimensional input unit 1 determines that the path is almost a straight line (= no node) and increments the distance by the distance counter. Add the value rλ. Here, r is the radius of the rotating body 1 ′, and λ is the rotation angle of the rotating body 1 ′. Note that the distance may be counted each time the rotating body 1 'makes one rotation (in this case, the increment value of the distance is 2πr
Becomes).

Step S7: (Sending of measurement signal) If | δ−δ ′ |> ε in step S6, the two-dimensional input unit 1 determines that there is a bend (= node) and changes to a node detection signal. The subsequent rotation direction δ ′ and the distance counter value d (the distance from the previous node to the current node) are represented by C
The data is sent to PU4, δ = δ ′, and the process returns to S2 for inputting the path following the node generated this time.

Step S8: (Two-dimensional input ending process) When the urging force on the rotating body 1 'becomes equal to or less than a predetermined value, the two-dimensional input unit 1 sends a destination detection signal to the CPU 4 as a trace to the destination. Then, the distance counter value (= the distance from the previous node to the destination (the distance of the last taxiway)) is sent to the CPU 4 and the two-dimensional input processing is terminated.

[Control Operation at Route Setting] FIG. 7 is a flowchart showing an example of control operation at the time of route setting, and FIG. 8 is a diagram showing a display example of an operation guide at this time (FIG. 8).
The example of (a) shows an example in which a clock is displayed in the clock display mode).

Step T1: (Determination of Mode) The CPU 4 checks the status signal sent from the switch input unit 9, and determines that the route setting mode has been designated when the route setting key (switch A in the embodiment) is operated. To T2.

Step T2: (Designation of Scale) The CPU 4 displays a scale input guide as shown in FIG. 8B and prompts the user to specify the scale of the map to be used. The user operates the selection designation key (the switch B in the embodiment) to select the scale, and performs a confirmation operation (presses down the switch E in the embodiment). When it is desired to specify a scale not displayed, the user operates a scroll key (switch C in the embodiment) to display a desired scale, and then selects and specifies.

The CPU 4 checks the status signal transmitted from the switch input unit 9, and when the selection designation key is operated, takes in the selected scale (scale code) into the RAM 7, and when the confirmation key is designated, transits to T3. When the scroll key is operated, the screen is scrolled to display the next scale. The captured scale is displayed on the RAM 7.

Step T3: (Registration and display of the coordinates and orientation of the departure point) The CPU 4 sends the coordinate data of the departure point S sent from the switch input unit 9 or the GPS processing unit 3 according to the procedure shown in step S1 of FIG. (Latitude, longitude) is stored in the coordinate field 31 of the first guidance route in the route table 30. In addition, GPS
Since the coordinate data sent from the processing unit 3 is different from the map (issued by the Geospatial Information Authority of Japan) in the coordinate system, the coordinates (longitude,
The value obtained after inverse conversion to latitude is stored (however, if data based on the GPS coordinate system is stored in the coordinate column 32 of the route table, manually input coordinate data is stored in the GPS coordinate system). The data is converted and stored in the coordinate field 32).

Step T4: (Message Display and Start of Map Trace) The CPU 4 displays a message as shown in FIG. 4D and prompts the user to input a route (trace a route on a map) by the two-dimensional input unit 1. When the user operates the two-dimensional input unit 1 as described in step S3 of FIG. 6 and traces along the route from the starting point to the destination on the (paper) map,
Data (signal) is sent to the CPU 4 according to the procedure shown in steps S2 to S8 in FIG.

Step T5: (Display of Input Route Data and Confirmation of Destination) As shown in FIG. 8E, the CPU 4 converts the coordinate data of the received data into a node number (in the case of a destination, a node number is used instead of a node number). With the letter “F”). This allows the user to determine whether the tracing has been performed correctly and to determine whether the tracing has been performed to the destination F or the biasing force has been weakened (for example, when the rotating unit 1 'is accidentally released from the map). can do. When the user operates the trace end confirmation key (the switch E in the embodiment), the process transits to T9 to perform the end processing. The node number is C
Each time the PU 4 receives the node detection signal from the two-dimensional input unit 1, the node counter (initial value =
Add 1 to 1) to determine.

Step T6: (Registration registration) The CPU 4 calculates the distance counter value of the data received from the two-dimensional input unit 1, and calculates the distance di-1 from the previous node to the current node. It is stored in the distance column 33 of the route table 30 (the number is the distance column of the previous taxiway (that is, the current taxiway i-1)).

Step T7: (Calculation and registration of azimuth) The CPU 4 calculates the azimuth based on the rotation direction data of the rotator 1 'received from the two-dimensional input unit 1, and calculates the azimuth.
In the direction column 34 (the direction column of the taxiway with the number having the same value as the node counter value) and return to T4.

Step T7: (Registration of coordinates) The CPU 4 calculates the coordinates (latitude, longitude) of the node (turning angle in this example) indicated by the node counter based on the distance and direction obtained in steps S6 and S7. And stored in a coordinate column 31 of the route table 30 (a coordinate column of a guideway whose number is the same as the node counter value).

Step T9: (Registration registration) The CPU 4 calculates the value of the distance counter value of the data received from the two-dimensional input unit 1, and calculates the distance di-1 from the previous node to the destination S. Previous (taxiway i-1)
And the route setting mode is ended.

With the configuration shown in FIGS. 6 and 7, it is possible to easily set a route only by sequentially tracing the route on the map with the rotating body 1 'of the two-dimensional input unit 1. In addition, fine curves and the like in which it is difficult to read the longitude and latitude on the map are automatically set as nodes, so that it is easy to set fine guideways.

[Control Operation During Route Guidance] FIG. 9 is a flowchart showing an example of control operation during route guidance.

Step U1: (Designation of Route Guidance Mode) When a route is set in advance, the user goes to the departure point S while viewing the map, and goes to the watch-type navigation device 100.
By operating the switch input unit 9, the route guidance mode is selected and designated. When the user sets a route at the departure place S, the route guidance mode is selected and designated at the place.

The CPU 4 checks the status signal from the switch input unit 9, and when the route setting mode is designated, the process goes to step U2.

Step U2: (Reception of GPS Data) The CPU 4 controls the GPS processing unit 3 to perform an operation of receiving data from GPS satellites. GPS processing unit 3 is GPS
After amplifying and demodulating radio waves received via the antenna, the obtained satellite data is decoded.

Step U3 (Calculation of Current Position) Next, the GPS processing section 3 uses the decoded data to determine the self-position of the wristwatch-type navigator 100 (current position = latitude, longitude).
Is calculated, converted into a coordinate system value of the map, and
To send to.

Step U4: (Determination of coincidence between departure point S and current position P) When the CPU 4 receives the value of the current position P from the GPS processing unit 3, the CPU 4 reads the first row (node 1 = departure point S) of the route table 30. The coordinate data is extracted, and the coordinates of the current position p and the departure point S are compared. When the departure point S and the current position P substantially coincide with each other, the departure point S is shifted to U5 as the departure point S = current position P, otherwise, the flow returns to U2 (the user sets the departure point S
Is confirmed again and it moves to the vicinity). Step U5: (Notification of Route Display and Guidance Start) The CPU 4 determines the route 40 based on the route table 30 of FIG.
Is displayed on the screen 5 ′ of the display unit 5. Further, the buzzer 11 is operated to output a buzzer sound, thereby notifying the user of the guidance start.

Step U6: (GPS Data Reception) The CPU 4 controls the GPS processing unit 3 to perform an operation of receiving data from GPS satellites. GPS processing unit 3 is GPS
After amplifying and demodulating radio waves received via the antenna 2, the obtained satellite data is decoded.

Step U7 (Calculation of Current Position) Next, the GPS processing unit 3 calculates the current position (= latitude, longitude) and direction of the wristwatch-type navigator 100 based on the decoded data, and calculates the values in the coordinate system of the map. Convert (Fig. 5
The coordinates are converted so that the traveling direction is displayed upward on the screen as shown in FIG.

Step U8: (Display of Guidance Guide) The CPU 4 displays the guidance guide 51 (51 ') as shown in FIG. 5 based on the coordinate values (latitude, longitude) and direction received from the GPS processing unit 3. . At this time, the tip of the guide 51 (51 ') is oriented according to the direction from the GPS processing unit 3 so that the traveling direction is displayed upward on the screen as shown in FIG. That is, they are displayed after being subjected to coordinate conversion (FIG. 5).

Step U9: (Calculation of the degree of coincidence between the current position and the route) The CPU 4 calculates the distance between the current position and the route closest to the current position (that is, the length of the perpendicular drawn from the current position to the route). If the distance L is equal to or greater than a predetermined value (| L |> α), it is determined that the current position is out of the route, and the process transits to S1. If the distance L is within the predetermined value (| L | ≦ α), U6 Return to and continue the route guidance.

Step U10: (Warning notification, separation distance L
The CPU 4 drives the buzzer 11 to emit a warning sound to notify the user that the route is out of place, and to provide a difference (separation distance) L between the route and the current position and the coordinate location (latitude,
Longitude) on the screen 51 on which the route and the guide are displayed
(FIG. 5B) and returns to U6.

With the above-described configuration, a corner where it is difficult to read the latitude and longitude on a map is also set and displayed as a node, so that even in a place where the road is not clear such as a mountain, a river, or a wilderness, the realities along the terrain can be obtained. Route guidance can be performed. Further, it is possible to easily input a route not only in the outdoors but also in a city area.

In the above description, the means for reading the route on the map detects the rotation angle and the rotation direction of the rotating body.
Although the dimension input unit 1 has been described as an example, the means for reading the route on the map is not limited to this. (For example, although there is a limitation on the battery life at this time, an optical reflection type reading device (e.g. The image processing may be performed by reading the route on the map by reading the image.

Although the embodiment of the present invention has been described above, the present invention is not limited to the above embodiment, and it goes without saying that various modifications can be made.

[0072]

As described above, according to the portable route guidance device of the first invention and the route input method of the fifth invention, the route can be easily set only by sequentially reading the routes on the map. Can be. In addition, fine curves and the like in which it is difficult to read the longitude and latitude on the map are automatically set as nodes, so that it is easy to set fine guideways.

Further, according to the portable route guidance device of the second invention, the route can be easily set only by sequentially tracing the route on the map with the rotating body. In addition, it is possible to easily read a fine curve or the like on the map where it is difficult to read the longitude and the latitude by tracing.

Further, according to the portable route guidance device of the third invention, the portion for reading the route can be used by connecting it to the main body if necessary, so that the main body can be used on a map even with the main body attached to an arm or the like. The route can be easily read.

According to the portable route guidance apparatus of the fourth invention, if the displayed route is too far from the self-position (= current position), it is detected and a warning such as a buzzer is issued. In addition, it is possible to display and notify the user of his / her position and the distance from the route, so that appropriate route guidance can be performed.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of an embodiment of a portable route guidance device of the present invention.

FIG. 2 is a diagram showing an appearance of an embodiment of a wristwatch-type navigator.

FIG. 3 is a diagram showing a configuration of an embodiment of a route setting table.

FIG. 4 is an explanatory diagram of a route, a node, and a guide route.

FIG. 5 is a diagram showing an example of a route and a guide displayed at the time of route guidance.

FIG. 6 is a flowchart illustrating a distance and azimuth detecting operation of a route input unit.

FIG. 7 is a flowchart illustrating an example of a control operation when setting a route.

FIG. 8 is a diagram showing a display example of an operation guide when setting a route.

FIG. 9 is a flowchart illustrating an example of a control operation at the time of route guidance.

[Explanation of symbols]

 1, 1 "two-dimensional input unit (map route information input unit) 1 'rotating body 3 GPS processing unit (positioning unit) 4 control unit (display control unit) 5 display unit 11 buzzer, notification unit (notification unit) 30 route table (Route information storage means) 100 Wrist watch type navigator (portable route guidance device)

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 2C032 HB22 HC11 HC13 HC24 HC31 HD03 HD16 2F029 AA07 AB07 AC02 AC14 AC16 AD07 5H180 AA21 FF05 FF22 FF33 FF36

Claims (5)

[Claims] 1. A display unit, positioning means for receiving positioning information sent from a satellite, and calculating a self-position based on the positioning information, and a map route for reading a route on an external map to obtain route information Information acquisition means, route information storage means for storing the route information acquired by the map route information acquisition means, and displaying a route on the display unit based on the route information stored in the route information storage means, Display control means for superimposing and displaying the self-position acquired by the positioning means on the display unit. 2. The map route information input means includes: a rotatable member protruded from the apparatus main body and rotatably formed; and a distance for measuring a moving distance when the rotator is urged on the map and moves. The portable route guidance device according to claim 1, further comprising: a measurement unit; and a rotation direction detection unit configured to detect a rotation direction when the rotator rotates while being urged on a map path. . 3. The map route information input means contains a rotatable rotator and is configured to be freely connectable to an apparatus body. The rotator biases the map on the map. Distance measuring means for measuring a moving distance when the moving body is moved, and rotating direction detecting means for detecting a rotating direction when the rotating body is rotated by being urged on a route on a map. The portable route guidance device according to claim 1, wherein: 4. A separation distance calculating means for calculating a distance between the self-position and the route displayed together with the route on the display unit by the display control means, and a distance between the self-position and the route calculated by the separation distance calculating means. 2. The portable route guidance device according to claim 1, further comprising a notifying unit for notifying when the distance is longer than a predetermined distance. 5. A portable electronic device which receives positioning information sent from a satellite and calculates a self-position based on the positioning information, wherein a position of a departure place described in an external map is input, and Trace on the path from the starting point to the destination above, for each turn detected at the time of said trace, detect the distance between the previous turn and the turn of the current turn, and from the detected turn to the previous The distance between the turning angle and the direction of the straight line connecting the current turning angle is calculated and stored in the memory, and the coordinate value of the current turning angle is calculated from the distance and the direction and stored in the memory. A route input method, wherein the method is repeated until the process is completed.