JP3400915B2 - Portable navigation device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a portable navigation device that can be carried and used by pedestrians.

[0002]

2. Description of the Related Art A navigation device has been proposed and put into practical use as a device for guiding a route to a destination. This navigation device uses a satellite-based GP
It is provided with an S (Global Positioning System), a CD-ROM device having map information, and a liquid crystal display device as display means. In recent years, this kind of navigation device has been widely developed, especially for in-vehicle use, and has been miniaturized. Then, as one of the developments of the navigation device, a walking route guidance device in which a vehicle-mounted device is diverted for a pedestrian has been commercialized.

[0003]

However, this walking route guidance device is a vehicle-mounted device which is commercially available as a portable device without changing the basic configuration. Therefore, the entire device is portable. Is large and inconvenient to carry.

The present invention is to provide a portable navigation device which is convenient for a pedestrian to carry around.

[0005]

According to the present invention, there is provided first storage means for storing route information relating to a starting point and a destination transmitted from a base side device, a step number counting means for counting the number of steps, and a direction. Direction sensor, second storage means for storing a step value, a step number signal from the step number counting means, a step value stored in the second storage means, an orientation signal from the direction sensor and the first step signal. Changing the walking direction based on the first control means for performing route guidance based on the route information signal from the storage means, the direction signal from the direction sensor and the route information signal from the first storage means. When it is determined that the point has been reached, the stride stored in the second storage means based on the step count signal from the step count counting means and the route information stored in the first storage means. Equipped with a step correction means for correcting the value Is a mobile navigation device according to claim.

According to the present invention, the route information relating to the origin and the destination transmitted from the base unit is received and
Is stored in the storage means and the route guidance is performed using the route information signal from the first storage means. That is, the portable navigation device of the present invention is a device carried by a pedestrian, and the portable navigation device and the base-side device installed on the ground side constitute a navigation system. In this navigation system, devices that do not need to be carried are configured as base-side devices separately from the portable navigation device. Therefore, the miniaturization of the portable navigation device is achieved, and it becomes easy to carry the portable device.

Further, the portable navigation device has a first storage means for storing the route information about the origin and the destination transmitted from the base side device, and after obtaining the route information from the base side device, Route guidance is performed based on the obtained route information, the step count signal, the stride value, and the azimuth signal. Since the portable navigation device can store the step value of the user (pedestrian) in the second storage means, the walking distance of the pedestrian can be calculated by the stored step value and the step number signal from the step number counting means. Can be accurately known, and accurate route guidance to the destination can be performed. Therefore, there is little information exchange between the base-side device and the portable navigation device, and it is possible to provide an efficient system.

Further, when it is judged that the point where the walking direction is changed is reached based on the direction signal and the route information, the stride value stored in the second storage means based on the step number signal and the route information. Is corrected. That is, a value obtained by dividing a distance between two predetermined points, for example, a distance between a point where the walking direction is changed and a point where the walking direction is changed before that by the step count value counted by the step count counting means is a second step value. It is stored in the storage means. Since the corrected stride value stored in this manner is used for subsequent calculation of the walking distance, it is possible to know the walking distance of the pedestrian more accurately.

Further, the present invention is characterized in that the direction sensor is a geomagnetic sensor.

According to the present invention, since the direction sensor is a geomagnetic sensor, the direction of a pedestrian can be detected in real time with a simple structure.

[0011]

1 is a block diagram showing a simplified example of the configuration of a portable navigation system using a portable navigation device according to a first embodiment of the present invention.

In FIG. 1, the illustrated navigation system is a portable side device 2 which is a portable navigation device.
And the base-side device 4, and information is exchanged between the mobile-side device 2 and the base-side device 4.

The illustrated portable device 2 includes a step counting means 6,
The terrestrial magnetism sensor 8, the voice output means 10, the input means 12 and the display means 14 are provided, and this device 2 is basically carried by a pedestrian. The step counting means 6 counts the number of steps of a pedestrian carrying the portable device 2, and the geomagnetic sensor 8 as an orientation sensor detects the walking direction of the pedestrian having the portable device 2. The voice output means 10 can be composed of, for example, a speaker, and guides the route by voice to a pedestrian carrying the portable device 2. The input means 12 includes, for example, a numeric keypad and a Japanese syllabary key,
By using these keys, letters and numbers can be input. In the embodiment, the starting point and the destination are input by the input means 12. As a departure place and a destination, a residence display such as "A-C-B-C-C-D-E" may be entered, or those telephone numbers may be entered, and a typical building, for example, You may enter the names of stations, schools, hospitals, public facilities such as city halls, department stores, supermarkets, etc. It should be noted that the input information of the departure place and the destination cannot correspond to the map information stored in the base-side device 4 for the route search. The display means 14 can be composed of, for example, a liquid crystal display device, and when input by the input means 12, it displays the input starting point and destination, so that it can be confirmed whether or not the input content is correct. Has become. Further, as will be described later in detail, the display means 14 is
The route guidance information is displayed to inform the pedestrian of the contents. In this example, the input means 12 also functions as a step input means. That is, by pressing the numeric keypad of the input means 12 and inputting a step value, for example, "80" centimeter, the step of a pedestrian using the portable device 2 can be input. The stride value input by the input means 12 is used when calculating the walking distance of a pedestrian, as will be described later.

The portable device 2 has a storage means 16. In the embodiment, the storage means 16 includes first to fourth storage means 18, 20, 22, 24. The first storage unit 18 stores the route information from the starting point to the destination. The second storage unit 20 stores the stride value input by the input unit 12. Further, the departure point and the destination input by the input section 12 are stored in the third storage section 22. Furthermore, the fourth storage means 24
In, the stride values of a plurality of people are stored together with ID (certification) numbers. Therefore, when the ID number is input by the input means 12, the step value corresponding to this ID number is read from the fourth storage means 22 and stored in the second storage means 20. When the step value is not registered in advance together with the ID number, the fourth storage means 24 can be omitted.

The portable device 2 further comprises a step counting means 6, a geomagnetic sensor 8, an input means 12 and a storage means 16.
It has a first control means 26 for processing the signals from and also includes a start key 28, an end key 30 and a clear key 32. In the illustrated form, the control means 26 includes the walking processing means 34 and the stride correction means 3.
Have six. The walking processing means 34 is the step counting means 6
The distance traveled in the moving azimuth of the pedestrian is calculated based on the step count signal from the pedestrian, the azimuth signal from the geomagnetic sensor 8 and the stride value stored in the second storage means 20, and the mileage is stored in the first storage means 18. The route guidance is given to the pedestrian while comparing it with the route information (in other words, a signal is sent to the voice output means 10 and the display means 14 to inform the pedestrian of the route to be taken next). In addition, the stride correction means 36 calculates an actual stride value based on the distance that the pedestrian walks and the step count value required to walk the distance, and the calculated stride value is used as a corrected stride value as a second value. It is stored in the storage means 20. As a result, the stored stride value is cleared, and the walking distance is calculated using the corrected stride value thereafter.

The start key 28 is pressed when the use of the portable device 2 is started, and by pressing this key 28, the operation of the navigation system, that is, the portable device 2 is started. The end key 30 is pressed when the use of the navigation system is finished, and by pressing this key 30, the operation of the system, that is, the portable device 2 is finished. The clear key 32 is pressed when clearing an input error by the input means 12,
By pressing this key 32, the information being input (starting point, destination, step value) is cleared.

The portable device 2 further includes a transmitting / receiving means 38.
Is included. The transmitting / receiving means 38 can be composed of, for example, a PHS (Personal Handy System), and through the transmitting / receiving means 38, a signal from the portable device 2
That is, the origin signal and the destination signal are transmitted to the base side device 4, the route information from the base side device 4 to the destination is received, and the route information is transmitted to the first storage means 18 through the control means 26. To pay. The transmission / reception unit 38 has a transmission key 40, and when the transmission key 40 is pressed, a signal is transmitted from the portable device 2.

The base unit 4 comprises a map information storage means 42 and a second control means 44 for processing a map information signal from the map information storage means 42, and is fixedly installed on the ground. The map information storage means 42 stores map information. In the embodiment, the map information is displayed as a residence display,
Includes locations corresponding to telephone numbers and typical building names. The control means 44 searches for a route from the departure place to the destination on the basis of the departure point signal and the destination signal from the portable device 2 and the map information signal from the map information storage means 42, and practically the shortest distance. Determine the route. The search and determination of this route requires a relatively large-capacity storage means for storing map information and a control means for processing a signal at a relatively high speed. Since it is provided in No. 4, it is possible to use, as the base-side device 4, a device that sufficiently satisfies the above-mentioned performance.
On the other hand, the portable device 2 does not need a storage unit for storing map information and a control unit for searching a route to determine the shortest route, and thus the portable device 2 is small and lightweight. Is achieved, which makes it easier for pedestrians to carry and carry.

The base unit 4 further includes a transmitting / receiving means 46.
Is included. The transmitting / receiving means 46, which may be a transmitter / receiver, receives the departure point signal and the destination signal from the transmitting / receiving means 38 of the portable device 2, and sends these signals to the control means 44,
The route information to the destination determined by the control means 44 is sent to the portable device 2.

Next, the operation of the navigation system will be described with reference to FIGS. First, in FIG. 2, when the use of this system is started, the start key 28 is pressed. When pressed in this way, the process proceeds to step S1 and the supply of electric current from a battery (not shown) built in the portable device 2 is started, and the portable device 2 is activated. Next, in step S2, the departure place is input. The input of the departure place is performed by pressing the ten-key and the Japanese syllabary key of the input means 12, and the input signal thus input is stored in the third storage means 22 via the control means 26 and at the same time, the display means 1 is displayed.
No. 4 is displayed so that the input content can be confirmed. For example, in the map of FIG. 5, when departing from P station, the input of the departure place by the input means 12 is, for example, “P station”. When the telephone number of the P station is known, the telephone number may be entered instead of the station name, or the residence of the station may be displayed instead.

Next, in step S3, the destination is input. The input of the destination is performed in the same manner as the input of the departure point. For example, when the company S is the destination in the map of FIG. 5, the input of the destination by the input means 12 is, for example, "S company". Instead of inputting "S company" as the company name, the telephone number or the residence display can be input. The destination information input by the input means 12 is stored in the third storage means 22 similarly to the departure place information.

Next, in step S4, the stride length of the pedestrian is set using the portable device 2. The step length is set by the input means 12. In the embodiment, 2
There are different input styles. That is, in the case of directly inputting the step value, the key of the input means 12 may be pressed to input, for example, "80" and the size of the step, and the step value thus input is stored in the second storage means 20. Remembered. Further, when reading and inputting the step value registered in advance, it is sufficient to press the key of the input means 12 and input the ID number of the user. Of the stored stride values, the stride value corresponding to the input ID number is read, and the read stride value is stored in the second storage means 20. The input content of the stride value, that is, the stride value or the ID number is also displayed on the display means 14, and the content can be confirmed.

When the starting point, the destination, and the stride value are input, the process proceeds to step S5, and the starting point information and the destination information are transmitted to the base unit 4. Information can be transmitted by pressing the transmission key 40 of the transmitting / receiving means 38. That way,
Signals corresponding to the departure point information and the destination information stored in the third storage unit 22 are sent to the transmission / reception unit 38 via the control unit 26 and transmitted from the transmission / reception unit 38.

The signal thus transmitted is received by the transmitting / receiving means 46 of the base-side device 4 in step S6,
The received departure signal and destination signal are controlled by the control means 44.
Sent to. Then, in step S7, the base side device 4 searches for a route from the departure point to the destination. At the time of this route search, the map information stored in the map information storage means 42 is read and a map information signal corresponding to the map information is sent to the control means 44. Therefore, the control unit 44 searches for a route to the destination based on the map information signal from the map information storage unit 42 and the departure point signal and the destination signal from the portable device 2.
In the route search by the control means 44, for example, a plurality of routes from the departure point P station to the destination S company are selected on the map shown in FIG. 5, the total route length is calculated for each of the selected plurality of routes, and The substantially shortest route is determined as the optimum route (step S8). When selecting the optimum route, it is possible to add a condition such as giving priority to a large road or giving priority to a narrow alley when the total length of the route from the starting point to the destination is equal. The route information in the case of the embodiment is, for example, “a) go straight to the south, 500 m from P station to the Q intersection; b) turn left to the east, 200 m from the Q intersection to the R intersection; c) turn right to the south, and go to the S from the R intersection. 100m to the company. "

Next, in step S9, the route information is sent to the portable device 2. The route information is sent by transmitting a route information signal corresponding to the optimum route determined by the control unit 44 from the transmitting / receiving unit 46 to the portable device 2. The transmitted signal is received by the transmitting / receiving means 38 of the mobile device 2 (step S10),
The received route information signal is transmitted via the control means 26 to the first
Is stored in the first storage means 18 as route information to the destination S company (step S11).

In the embodiment, after the mobile-side device 2 obtains the information about the optimum route to the destination from the base-side device 4, the process proceeds to step S12 shown in FIG. 3, and the pedestrian actually turns to the destination. Start key 2 to start moving
8 is pressed again. Then, the process proceeds from step S12 to step S13, and the route guidance for the pedestrian by the portable device 2 is started. Then, the route guidance by the portable device 2 is performed until the pedestrian reaches the destination S company, and this route guidance is performed according to the flowchart (described later) shown in FIG. When the user arrives at the destination, the process proceeds from step S13 to step S14, and the route guidance by the portable device 2 ends, so the end key 30 is pressed.
When the end key 30 is pressed, the process proceeds to step S15,
The step correction is performed by the step correction means 36. The path information signal and the step count signal of the step counting means 6 stored in the first storage means 18 are used as the step correction means 36 of the control means 26.
The step length correcting means 36 is required to walk the entire length of the route from the starting point to the destination among the distance information signal and the step number signal of the total length of the route from the starting point to the destination among the route information signals. The corrected stride value is calculated based on the step count signal corresponding to the step count value (the path total length may be divided by the step count value). Next, in step S16, the corrected stride value is changed. That is, in step S4,
When the step value is directly input by the input means 12,
This corrected stride value is sent to the second storage means 20,
The corrected stride value is stored instead of the stride value stored in the storage unit 20. On the other hand, in step S4, the ID number is input by the input means 12 and the fourth storage means 2
4 to read the stride value stored in the second storage means 2
When stored in 0, the corrected stride value is sent to the second and fourth storage means 20 and 24, and the stride value stored in the second and fourth storage means 24 is registered in advance. The value (step value corresponding to the ID number) is changed to the corrected step value.

When the stride value is changed in step S16, the process proceeds to step S17, and the first storage means 18 is used.
The route information to the destination stored in is deleted.
Then, in step S18, the end key 30 is pressed again, so that the portable device 2 is deactivated, and the supply of current from the built-in battery (not shown) is stopped. Further, the corrected stride value stored in the second storage unit 20 is deleted.

In this embodiment, when the portable device 2 is to be used again, it is necessary to return to step S1 and press the start key 28, but in this case, the following can also be done. . After step S17, the procedure returns to step S2 without pressing the end key 30, and the starting point is input by the input means 12, and then step S2.
It is also possible to repeat 3 and subsequent steps in the same manner. At this time, since the corrected stride value is calculated in steps S15 and S16 and the corrected stride value is stored in the second storage means 20, the step input operation in step S4 is performed as follows.
It can be omitted.

The route guidance by the portable device 2 is performed as follows. With reference to FIGS. 4 to 6, when a pedestrian presses the start key 28 to start walking toward a destination, first, a route information signal from the first storage unit 18 to the destination is a control unit 26. To the control means 26
Is the first part of the route information, in other words the first from the point of origin.
Route information to the destination (Q intersection), more specifically, a route information signal relating to "go straight south, 500 m from P station to Q intersection" is output by voice output means 10 and display means 1.
In step S21, the display means 14 displays "Go straight south, 500 m from P station to Q intersection", and informs the pedestrian of the route information, and in step S22, voice output means. 10 outputs that effect and informs the pedestrian by voice.

Then, in step S23, it is determined whether or not the pedestrian has walked to the first destination. The walking distance of the pedestrian is calculated based on the step count value from the step count counting means 6 and the step length value stored in the second storage means 20, and the walking processing control means 34 uses the step count signal from the walking counting means 6 as a signal. The walking distance is calculated based on the step signal from the second storage means 20, and when the calculated distance becomes equal to the distance information in the first portion of the route information, it means that the vehicle has arrived at the first destination (Q intersection). Become. When the pedestrian moves to the first destination, that is, the Q intersection, the process proceeds from step S23 to step S24, and the second portion of the route information is displayed on the display means 14 in step S24, in other words, the first destination (Q intersection). To the second destination (R intersection), more specifically, a route information signal regarding "turn left east, 200 m from R intersection to Q intersection" is sent from the control means 26 to the display means 14, The display means 14 displays "Turn left to the east, 200 m from the Q intersection to the R intersection" to inform the pedestrian of the fact. Also, the second route information
This part is sent from the control means 26 to the voice output means 10, and the voice output means 10 outputs a voice to that effect in step S26. In this system, when a pedestrian makes a left turn to the east at the Q intersection, which is the first destination, the walking of the first part of the route information ends and the walking of the second part is started. The change is detected by the signal from the geomagnetic sensor 8.

In the embodiment, the directions used for this route guidance are “east”, “west”, “south”, “north”, “tohoku”,
There are 8 types of "south south", "northwest" and "south south", and the walking directions are "straight ahead", "back", "left", "right", "oblique left" as shown in FIG. , “Obliquely right”, “left rear” and “right rear”, and the voice output means 10 using these azimuths and walking directions.
And the route guidance by the display means 14 is performed.

As will be understood from the above description of the route guidance, in the embodiment, the first destination, the second destination ... Present on the way route to the destination are the points where the walking direction is changed. Basically, the intersection or the intersection where the building is selected and the walking direction is not changed is not selected. This is the first destination, the second destination
・ Because there is no need for the pedestrian to change the walking direction, it is only necessary to go straight to the next destination. In addition,
Regarding the destination, it is possible to provide a point on the way until the direction is changed, and in this case, more detailed route guidance can be provided.

When it is determined in step S23 that the vehicle has reached the first destination (Q intersection), that is, when the vehicle turns left at the intersection Q, the process proceeds to step S24.
In step S27, the stride value is corrected. In step S27, the step count value from the step count means 6 (step count value from the departure point to the Q intersection) is sent to the control means 26, and in step S28, the route information from the first storage means 18 is sent. Are sent to the control means 26. In step S29, the stride correction unit 36 of the control unit 26 causes the route information signal sent to the control unit 26 to include the first destination (Q intersection) from the starting point (this first point).
The target step is the corrected target point) and the corrected step length is based on the distance information signal of the path length and the step count signal corresponding to the step count value required to walk the route from the departure point to the first target point. The value is calculated (the path length may be divided by the step count value). The corrected stride value calculated in this way is calculated in step S
Updated at 30. That is, the corrected stride value is sent to the second storage means 20, and instead of the stride value (the stride value input by the input means 12 in step S4) stored in the second storage means 20, the corrected stride value is stored. The value is stored.
Then, after the first destination, the walking distance of the pedestrian is calculated based on the corrected stride value stored in the second storage unit 20. In this way, since the pedestrian's step length is corrected based on the actual walking at the beginning of walking, it is possible to accurately calculate the pedestrian's walking distance, which enables more accurate route guidance. Become.

When you turn left at the first destination (Q intersection),
In step S31, it is determined whether or not the vehicle reaches the second destination. The walking distance of the pedestrian is calculated based on the step count value from the step count means 6 (step count value from the departure point) and the corrected stride value stored in the second storage means 20, and the walking process control means 34 Calculates the walking distance based on the step count signal from the walking counting means 6 and the corrected stride signal from the second storage means 20, and this calculated distance is the distance information of the first portion and the second portion of the route information. When it becomes equal to the sum, it means that the vehicle has arrived at the second destination (R intersection). When the pedestrian moves to the second destination, that is, the Q intersection, the process proceeds from step S31 to step S32, and in step 32, the third portion of the route information, that is, the second destination (R intersection) is displayed on the display unit 14. From the destination to the destination (Company S), more specifically, a route information signal relating to "turn right south, 100 m from the R intersection to S Company" is sent from the control means 26 to the display means 14, and the display means 14 is displayed. "Turn right to the south, 100 from R intersection to company S
"m" is displayed and the pedestrian is informed accordingly. The third part of the route information is output from the control means 26 to the audio output means 1
0, and in step S33 the audio output means 1
0 outputs a voice to that effect.

When the vehicle makes a right turn at the R intersection, which is the second target point, the process proceeds to step S34, and it is determined whether or not the vehicle has arrived at the destination. The walking distance of the pedestrian is calculated based on the step count value from the step count means 6 (step count value from the departure point) and the corrected stride value of the second storage means 20, and the walking processing control means 34 calculates the walk count. The walking distance is calculated based on the step count signal from the means 6 and the corrected stride signal from the second storage means 20, and the calculated distance is the sum of the distance information from the starting point to the destination of the route information (first to first). When it becomes equal to the sum of the distance information of the part 3), it means that the destination (company S) has arrived. When the pedestrian moves to the destination, that is, Company S, the process proceeds from step S34 to step S35, and step S3
In 5, the display means 14 displays the destination and notifies the pedestrian that the destination has been reached. In addition, step S36
In, the voice output means 10 outputs the destination by voice,
Notify pedestrians that they have arrived at their destination.

As described above, the first unit of the portable device 2 is
After the route guidance of the pedestrian is performed based on the route information stored in the storage means 18 and the route guidance is finished, that is, after reaching the destination, the end key 30 is used as described above.
Is pressed (step S14).

FIG. 7 is a block diagram schematically showing a main part of a navigation system using a portable navigation device according to a second embodiment of the present invention. In the second embodiment, the mobile device is modified, but the base device is substantially the same as that of the first embodiment.
In the second embodiment, substantially the same members as those in the first embodiment are designated by the same reference numerals and the description thereof will be omitted.

In FIG. 7, the portable device 102 shown in FIG.
Is a portable unit 104 that is carried by a pedestrian,
It is composed of a transmission / reception unit 106 that enables transmission / reception of information between the mobile unit 104 and the base-side device. The mobile unit 102 has substantially the same configuration as the mobile device 2 of the first embodiment except for the transmitting / receiving unit 38, and includes a step counting unit 6, a geomagnetic sensor 8, a voice output unit 10, an input unit 12, and a display unit. 14, storage means 1
6, control means 26, start key 28, end key 30
And a clear key 32 are provided. These configurations are
It is substantially the same as that of the first embodiment.

The transmission / reception unit 106 is composed of the public telephone device 108 in the embodiment, and the public telephone device 1
Reference numeral 08 denotes a transmitting / receiving means 110 for transmitting / receiving a signal,
The input means 112 is provided for inputting a calling number for calling the base unit, and the input means 112 includes a ten-key pad for inputting the number.

Portable unit 104 and public telephone device 106
Is the code 1 when exchanging information between them.
14 is detachably connected. That is, the mobile unit 104 and the public telephone device 108 are each provided with a terminal portion, the terminal on one end side of the cord 114 is connected to the terminal portion of the mobile unit 104, and the terminal on the other end side of the public telephone device 108. It is connected to the terminal. The transmission / reception unit 106 is not limited to the public telephone device 108, but may be, for example, a business telephone device or a home telephone device. Since the portable device 102 is composed of the portable unit 104 and the transmitting / receiving unit 106, and the telephone device 108 installed nationwide is used as the transmitting / receiving unit 106, there is no inconvenience for transmitting / receiving information, and the portable unit 102 Further weight reduction and size reduction (corresponding to the device purchased by the user) can be achieved, and the cost can be reduced.

Next, referring to FIG. 8 together with FIG. 7, the second
The operation of the system according to the embodiment will be described. Step S4
Press the start key 28 at 1 to carry the portable unit 104.
To the operating state. Next, in step S42, the departure place is input by the input means 12, and also in step S43.
Enter the destination at. After that, the stride value is input by the input means 12 which also functions as the stride input means. The operations of steps S41 to S44 are substantially the same as steps S1 to S4 in the first embodiment.

Next, carry the portable unit 104 to the place where the public telephone unit 108 is installed, and connect the portable unit 104 and the public telephone unit 108 with the cord 114.
(Step S45). In addition, code 1
The connection of 14 can also be performed before pressing the start key 28, that is, before step S41.

After connecting the cord 114, step S
Proceeding to 46, the input means 112 of the public telephone device 108 is pressed to input the calling number for transmitting / receiving with the base side device (not shown). Thus, the portable unit 104
And the base-side device are connected via the public telephone device 108, and it becomes possible to exchange information signals, which will be described later, between the mobile unit 104 and the base-side device. Next, step S4
7, the signal relating to the departure place and the destination input by the portable unit 104 is transmitted to the base side device via the public telephone device 108, and the transmitted departure place signal and destination signal are received by the base side device. (Step S4
8).

Next, in step S48, the base-side device searches for a route from the departure point to the destination based on the stored map information signal and the received departure point signal and destination signal, and in step S50. The optimal route is determined at. The route search and determination in steps S48 to S50 are substantially the same as steps S6 to S8 in the first embodiment.

When the route to the destination is determined by the base side device, the process proceeds to step S51, a route information signal is transmitted from the base side device, and the transmitted information signal is changed to step S5.
At 2, it is received by the public telephone device 108. Then, the received route information is code 114 from the public telephone device 108.
The route information sent to the portable unit 104 via the mobile unit 104 is stored in the storage unit 16, and the route information is stored in the storage unit 16.
The route guidance by 04 is performed based on the route information stored in the storage means 16.

After the route information is sent from the base side device, it becomes unnecessary to exchange information with the base side device.
The cord 114 is removed and the connection between the mobile unit 104 and the public telephone device 108 is released (step S54). Next, in step S55, the end key 30 is pressed to complete the exchange of route information. After that, step S
Proceeding to 56, the start key 28 is pressed. As a result, the route guidance by the mobile unit 104 is started, and thereafter, the same operations as steps S13 to S18 in the first embodiment are performed. Also, for route guidance, the same operations as in steps S21 to S36 in the first embodiment are performed.

Although the embodiments of the present invention have been described above, the present invention is not limited to these embodiments, and various changes and modifications can be made without departing from the scope of the present invention.

[0048]

As described above, according to the present invention, the route information regarding the origin and the destination transmitted from the base-side device is received and stored in the first storage means, and the route information is stored in the first storage means. Route guidance is performed using the route information signal. In other words, those that do not need to be carried are configured as the base side device separately from the portable navigation device.
The miniaturization of the portable navigation device is achieved, and it becomes easy to carry the portable device.

Further, the portable navigation device has the first storage means for storing the route information about the origin and the destination transmitted from the base side device, and after obtaining the route information from the base side device, Route guidance is performed based on the obtained route information, the step count signal, the stride value, and the azimuth signal. Since the portable navigation device can store the step value of the user (pedestrian) in the second storage means, the walking distance of the pedestrian can be calculated by the stored step value and the step number signal from the step number counting means. Can be accurately known, and accurate route guidance to the destination can be performed. Therefore, there is little information exchange between the base-side device and the portable navigation device, and it is possible to provide an efficient system.

Further, when it is determined that the point where the walking direction is changed is reached based on the azimuth signal and the route information, the step value stored in the second storage means based on the step number signal and the route information. Is corrected. That is, a value obtained by dividing a distance between two predetermined points, for example, a distance between a point where the walking direction is changed and a point where the walking direction is changed before that by the step count value counted by the step count counting means is a second step value. It is stored in the storage means. Since the corrected stride value stored in this manner is used for subsequent calculation of the walking distance, it is possible to know the walking distance of the pedestrian more accurately.

Further, according to the present invention, since the azimuth sensor is a geomagnetic sensor, the pedestrian's azimuth can be simply structured,
It can be detected in real time.

[0052]

[0053]

[Brief description of drawings]

FIG. 1 is a block diagram schematically showing a configuration example of a navigation system using a portable navigation device according to a first embodiment of the present invention.

FIG. 2 is a flowchart illustrating an operation up to the exchange of route information in the navigation system of FIG.

FIG. 3 is a flowchart illustrating an operation after route guidance in the navigation system of FIG.

FIG. 4 is a flowchart illustrating an operation of route guidance in the navigation system of FIG.

FIG. 5 is an explanatory diagram schematically showing a map for explaining route guidance from a departure place to a destination.

FIG. 6 is a simplified explanatory diagram illustrating a display format regarding a walking direction of a pedestrian.

FIG. 7 is a block diagram schematically showing a configuration example of a navigation system using a portable navigation device according to a second embodiment of the present invention.

8 is a flowchart illustrating an operation up to the exchange of route information in the navigation system of FIG.

[Explanation of symbols]

2,102 Mobile device 4 Base side equipment 6 Step counting means 8 Geomagnetic sensor 10 Audio output means 12 Input means 14 Display means 16 storage means 18 First storage means 20 Second storage means 26 Control means 38 Transmission / reception means 42 map information storage means 44 Control means 46 Transmission / reception means 104 mobile unit 106 transceiver unit 108 Public telephone device

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Claims (2)

(57) [Claims] 1. A first storage means for storing route information relating to a departure place and a destination transmitted from a base-side device, a step count counting means for counting the number of steps, an orientation sensor for detecting an orientation, and a step value. Second storage means for storing, a step count signal from the step count counting means, a stride value stored in the second storage means, an azimuth signal from the azimuth sensor, and a route information signal from the first storage means It is determined that the vehicle has reached the point where the walking direction is to be changed, based on the first control means for performing route guidance based on the direction information, the direction signal from the direction sensor, and the route information signal from the first storage means. Sometimes, a stride correction means for correcting the stride value stored in the second storage means based on the step count signal from the step count counting means and the route information stored in the first storage means. A mobile phone characterized by Navigation device. 2. The portable navigation device according to claim 1, wherein the orientation sensor is a geomagnetic sensor.