JP5156705B2 - Simple navigation device - Google Patents

Description

  The present invention relates to a low-priced simplified navigation device with limited functions.

  2. Description of the Related Art A navigation device that searches for a guidance route from the current location to a destination and performs route guidance by voice while detecting a position by a GPS receiver or the like as a vehicle or a pedestrian moves is known (for example, Patent Documents) 1). This type of navigation device is equipped with a high-performance CPU, road map database, color display, etc., and searches for the optimum guidance route to the destination and superimposes the current location, guidance route, destination, etc. on the road map. The map display screen is updated as cars and pedestrians move.

JP 2002-257555 A

  However, in the conventional navigation device described above, a road map database for searching for a guidance route to the destination, a color display for displaying a map, a high-performance CPU for performing guidance route calculation, map display control, and the like are provided. It is listed and expensive.

(1) The invention of claim 1 is an input means for inputting voice guidance information at a plurality of voice guidance points on a guidance route from the current location to the destination from an external device, and at a plurality of voice guidance points inputted by the input means. Storage means for storing voice guidance information in the order from the current location, an operation member for the user to switch and select voice guidance points in the above order, an output means for outputting voice, and an operation member operated by the user select switches the voice guidance point on the order when the read from the storage means the voice guidance information corresponding to the voice guidance point selected, and a control means for outputting a voice from the output means, the control means clocking means Calculate the distance from the voice guidance point to the next voice guidance point in the order mentioned above, estimate the required travel time between the two points, and travel time between the two points measured by the time measuring means If more than the required passage time estimated, a simple navigation apparatus and outputting a voice warning from the output means.
( 2 ) The invention according to claim 2 is the simplified navigation device according to claim 1 , wherein the voice guidance points include road intersections, road branch points, and passing points on the guidance route.
( 3 ) The invention according to claim 3 is the simplified navigation device according to claim 1 or 2, wherein the external device searches for a guide route from the current location to the destination using the road map database, and the guide route Extracting a plurality of voice guidance points above and generating voice guidance information for each voice guidance point, and the input means inputs voice guidance information at a plurality of voice guidance points on the guidance route from an external device. This is a simple navigation device.

  According to the present invention, an inexpensive, small, and lightweight navigation device can be provided.

The figure which shows the structure of the simple navigation apparatus of 1st Embodiment. The figure which shows the structure of the center apparatus which distributes the voice guidance data in the some voice guidance point on the guidance route to the destination to a simple navigation apparatus. The figure which shows the structural example of the voice guidance data of 1st Embodiment The flowchart which shows the audio | voice guidance program performed with CPU of the simple navigation apparatus of 1st Embodiment The figure which shows the structure of the simple navigation apparatus of 2nd Embodiment. The figure which shows the structural example of the voice guidance data of 2nd Embodiment The flowchart which shows the audio | voice warning program of 2nd Embodiment The figure which shows the structure of the simple navigation apparatus of 3rd Embodiment. The flowchart which shows the audio | voice guidance program performed with CPU of the simple navigation apparatus of 3rd Embodiment

<< First Embodiment of the Invention >>
FIG. 1 shows a configuration of a simplified navigation device 101 according to the first embodiment. The simplified navigation device 101 according to the first embodiment includes a CPU 110, a communication circuit 111, an audio circuit 112, a data memory 113, a program memory 114, and a switch 115. The CPU 110 executes a voice guidance program (described later in detail) stored in the program memory 114, and controls voice route guidance at a plurality of voice guidance points on the guidance route to the destination. The simplified navigation device 101 according to the embodiment does not have the guidance route search function or the map display function that the conventional navigation device has, and does not have a plurality of voice guidance points on the guidance route to the destination. Since only the function of broadcasting the voice route guidance is provided, a low-function and inexpensive CPU can be used in place of the high-function CPU used in the conventional navigation apparatus.

  The voice circuit 112 utters voice guidance information stored in the data memory 113 in accordance with voice guidance control executed by the CPU 110. In the data memory 113, voice guidance data downloaded from the outside by the CPU 110 via the communication circuit 111 is stored. The program memory 114 stores a voice guidance program executed by the CPU 110 and various data. The switch 115 is an operation member for the user to switch the voice guidance point. The CPU 110 detects that the user has pressed the switch 115, and the CPU 110 switches the voice guidance point to the next point on the guidance route.

  Here, the communication circuit 111 only needs to have a function for the simplified navigation device 101 to capture voice guidance data from the outside, so that it is wired (LAN, etc.), wireless (cell phone, wireless LAN, infrared communication, Bluetooth, etc.) ), Portable media (HDD, CD / DVD, USB memory, etc.) can be used, but it is not necessarily limited to one as long as it has the necessary functions.

  FIG. 2 shows a configuration of the center device 201 that distributes voice guidance data at a plurality of voice guidance points on the guidance route to the destination to the simple navigation device 101. The center device 201 includes a map database 211, a route search unit 212, an input / output unit 213, and an audio data generation unit 214. The input / output unit 213 inputs the current location, the destination, and the current time information from the simplified navigation device 101 described above via the communication network.

  The route search unit 212 uses the road map data stored in the map database 211 to calculate and search for an optimum guide route from the current location to the destination. Then, a plurality of voice guidance points on the guidance route of the search result are extracted, voice guidance information is generated for each voice guidance point, and the voice guidance point and the voice guidance information are recorded in association with each other.

  Here, the voice guidance points from the current location to the destination include not only intersections such as crossroads and Y-shaped intersections, but also expressway branch points or landmark points such as target facilities and buildings on the guidance route. Etc. are included. In addition to the target facilities and buildings around intersections and junctions, the landmark points are the target facilities and buildings along the route of the guide route, and it is confirmed that they are traveling on the guide route. The location of the target that can be included is included. The voice guidance information includes the names of intersections, junctions, and landmarks, as well as the names of objects such as buildings and facilities around them, and right and left turns at intersections, junctions, and landmarks. , Information on the course such as going straight along the road, etc.

  The voice data generation unit 214 converts voice guidance information such as names of intersections, branch points, or landmark points, names of targets existing in the vicinity thereof, and information on a route into voice data. The format of the audio data is not limited to one as long as it can be spoken by the simple navigation apparatus 101, such as WAV format and PCM format. The input / output unit 213 outputs the voice guidance data converted into voice data by the voice data generation unit 214 to the simplified navigation device 101 via the communication network in order along the guidance route from the current location to the destination.

  When the communication network between the center 201 and the simple navigation device 101 is the Internet, voice guidance data is sent from the communication circuit 111 of the simple navigation device 101 to the data memory 113 via a personal computer connected to the Internet. Download and record. The communication method between the personal computer and the communication circuit 111 is not particularly limited. Portable communication such as wired communication such as LAN, mobile phone, wireless LAN, infrared communication, wireless communication such as Bluetooth, HDD, CD / DVD, USB memory, etc. Media can be used. When the communication network uses a mobile phone network, voice guidance data can be taken into the data memory 113 directly from the center device 201 via the communication circuit 111 of the simplified navigation device 101 without using a personal computer. is there.

  FIG. 3 shows an example of the structure of the voice guidance data 300 according to the first embodiment. The voice guidance data 300 includes voice guidance data 311 for each of a plurality of voice guidance points on the guidance route from the current location to the destination, and each voice guidance data 311 has a point name (an intersection, a branch point, or a landmark point). 312), the name 313 of the target around the point, and information 314 about the course. The No. 1 point is the voice guidance data 311 of the current location, and the No. n point is the voice guidance data 311 of the destination. No. 2 to No. n-1 are voice guidance data at voice guidance points between the current location and the destination, and are arranged in order from the closest to the current location.

  FIG. 4 is a flowchart showing a voice guidance program executed by the CPU 110 of the simplified navigation device 101. When the simplified navigation apparatus 101 is turned on in step 411, first, the voice guidance data 311 in the current location, that is, the No. 1 voice guidance point of the voice guidance data 300 stored in the data memory 113 in step 412 is selected. . Next, in step 413, it is confirmed whether or not the user has pressed the switch 115. If the switch 115 is operated, the process proceeds to step 415. If the switch 115 is not operated, the process proceeds to step 414.

  If the switch 115 is not operated, the voice guidance data at the selected voice guidance point is read from the data memory 113 in step 414, and the voice guidance information is reproduced by the voice circuit 112 to be uttered. As described above, the voice guidance information includes a point name (name of an intersection, a branch point, or a landmark point), a name of a target around the point, information on a course, and the like.

  As long as the switch 115 is not operated, the processing of step 413 and step 414 is repeated, and the selected voice guidance information is uttered at a predetermined time interval. It is desirable that the operation timing of the switch 115 is promptly operated after passing through a point where voice guidance is provided.

  On the other hand, if the switch 115 is operated, it is checked in step 415 whether the currently selected voice guidance point is the destination. In the case of the destination, the process proceeds from step 413 to step 414, the No.n voice guidance point, that is, the voice guidance data of the destination is read from the data memory 113, and the voice guidance information of the destination is reproduced by the voice circuit 112 to be uttered. . On the other hand, if it is not the destination, the process proceeds to step 416, the voice guidance data 311 at the next voice guidance point of the voice guidance data 300 stored in the data memory 113 is selected, and the process returns to step 413.

  By executing the voice guidance program shown in FIG. 4, the voice guidance information for each voice guidance point stored in the data memory 113 shown in FIG. 3 can be broadcast in order from the current location to the destination.

  The voice guidance for the current location and the destination may be omitted. That is, in step 412, the voice guidance information of the No. 2 voice guidance point next to the current location is selected, and when the voice guidance point reaches the destination in step 415, the execution of the voice guidance program is terminated.

  As a specific example of voice guidance information, if the voice guidance point is an intersection, say, “Next is the Higashi Shinagawa intersection. There is a convenience store nearby. Turn right at the intersection.” Then, when the voice guidance point is a branch point where the expressway goes down from the highway to a general road, for example, “At the next exit, proceed from the expressway to the Funabashi area on the Keiyo road.” If the voice guidance point is just a passing point on the guidance route, for example, it will say “I will pass in front of Hachioji City Hall soon”.

<< Second Embodiment of the Invention >>
A second embodiment will be described in which a warning is given when the travel time from a certain voice guidance point to the next voice guidance point exceeds a preliminarily assumed time. FIG. 5 shows the configuration of the simplified navigation device 102 according to the second embodiment. In the simplified navigation device 102 of the second embodiment, a timer 116 is added to the simplified navigation device 101 of the first embodiment shown in FIG. The devices other than the timer 116 are the same as the devices of the simple navigation apparatus 101 shown in FIG.

  FIG. 6 shows an example of the structure of the voice guidance data 301 according to the second embodiment. The simplified navigation device 102 according to the second embodiment includes the latitude of each voice guidance point (No. 1 to No. n) in addition to the point name 312, the target name 313 around the point, and the route information 314. 315 and longitude 316 are obtained from the center 201 and stored in the data memory 113 as voice guidance data 311 for each voice guidance point.

  FIG. 7 is a flowchart showing a voice warning program according to the second embodiment. In the simplified navigation device 102 of the second embodiment, the CPU 110 executes the voice guidance program shown in FIG. 4 and the voice warning program shown in FIG. 7 in parallel. The description of the operation of the voice guidance program shown in FIG. 4 is omitted.

  When the simplified navigation apparatus 101 is turned on in step 411, the process proceeds to step 421, referring to the voice guidance data 301 in the data memory 113, and the latitude 315 of the currently selected voice guidance point and the next voice guidance point. And the longitude 316 is read, and the distance between both points is calculated based on them. In the subsequent step 422, the distance between the two points is divided by an average vehicle speed, for example, 40 km / h, to calculate the traveling time between the two points, and the warning time value is set to, for example, twice the traveling time. Note that the average vehicle speed may be a vehicle speed according to the type of traveling road such as an urban area and a suburb, or a highway. In addition, the warning time may be multiplied by the calculated traveling time, or a magnification according to the type of traveling road or other traveling environment may be used.

  In step 423, the timer 116 is reset, and the calculated warning time value is set and started. In step 424, it is confirmed whether or not the value of the timer 116 has exceeded the warning time value. If it does not exceed the warning time value, the process proceeds to step 425. In step 425, it is confirmed whether or not the switch 115 is pressed to switch the voice guidance point. If the switch 115 is operated, the process proceeds to step 421. If not, the process returns to step 424. When the switch 115 is operated, the current voice guidance point is switched to the next voice guidance point by the voice guidance program shown in FIG. 4, and therefore, in step 421, the new voice guidance point after switching and the next voice guidance point are switched. And the above-described processing is repeated.

  On the other hand, if the value of the timer 116 exceeds the warning time value, the process proceeds to step 426, and the voice circuit 112 issues a warning, for example, “There may be a mistake in the road”. Note that a warning may be made by simply sounding a buzzer.

  By executing the voice warning program shown in FIG. 7, a warning can be given when the travel time between the voice guidance points is longer than necessary, and the user is traveling along the guidance route. It can be confirmed whether or not.

<< Third Embodiment of the Invention >>
In the first and second embodiments, an example has been shown in which the user operates the switch 115 to manually switch the voice guidance point. However, the third embodiment is such that the voice guidance point is automatically switched by the GPS receiver. An embodiment will be described.

  FIG. 8 shows a configuration of the simplified navigation device 103 according to the third embodiment. In the simplified navigation device 103 of the third embodiment, a GPS receiver 117 is added to the simplified navigation device 101 of the first embodiment shown in FIG. The devices other than the GPS receiver 117 are the same as the devices of the simplified navigation device 101 shown in FIG. Note that voice guidance data 301 shown in FIG. 6 is stored in the data memory 113 of the simplified navigation device 103 of the third embodiment.

  FIG. 9 is a flowchart showing a voice guidance program executed by the CPU 110 of the simplified navigation device 103. When the simple navigation apparatus 103 is turned on in step 411, first, the voice guidance data 301 stored in the data memory 113 in step 432, that is, the voice guidance data 311 at the current location, is selected. .

  It is determined whether or not the voice guidance point selected in step 433 has been passed. The GPS receiver 117 repeatedly detects the vehicle position, and the latitude and longitude of the position detected by the GPS receiver 117 are compared with the latitude 315 and longitude 316 of the currently selected voice guidance point, and the GPS receiver 117 is selected. It is determined whether or not the voice guidance point has been passed. If it is determined that the selected voice guidance point has been passed, the process proceeds to step 435. If it is determined that the selected voice guidance point has not been passed, the process proceeds to step 434.

  If the selected voice guidance point is not passed, the voice guidance data 311 of the selected voice guidance point is read from the data memory 113 in step 434, and the voice guidance information is reproduced by the voice circuit 112 to be uttered. In the voice guidance information, in addition to the above-mentioned point names (names of intersections, branch points or landmark points), names of targets around the points, information on the course, the present location selected by the GPS receiver 117 is currently selected. Calculate the distance to the voice guidance point of, and say, for example, “It is 300 meters from Higashi-Shinagawa intersection. There is a convenience store nearby. Turn right there.”

  On the other hand, if it is determined that the selected voice guidance point has been passed, it is checked in step 435 whether or not the currently selected voice guidance point is the destination. In the case of the destination, the process proceeds from step 433 to step 434, the No.n voice guidance point, that is, the voice guidance data 311 of the destination is read out from the data memory 113, and the voice guidance information of the destination is reproduced by the voice circuit 112. Let On the other hand, if it is not the destination, the process proceeds to step 436, the voice guidance data 311 at the next voice guidance point of the voice guidance data 301 stored in the data memory 113 is selected, and the process returns to step 433.

  In the simplified navigation device 103 of the third embodiment, the voice warning program shown in FIG. 7 can be executed in parallel with the voice guidance program shown in FIG.

  By executing the voice guidance program shown in FIG. 9, the voice guidance information for each voice guidance point can be broadcast in order from the current location to the destination, and the voice guidance point can be switched automatically. The troublesome switching operation by the user becomes unnecessary.

  In the embodiment described above, an example in which the vehicle is equipped with the simplified navigation device of the present invention has been described. However, the simplified navigation device of the present invention is the minimum necessary for performing voice guidance at a preset voice guidance point. Since it has only limited functions and can be formed in a small size and light weight, it can be carried by a pedestrian or installed on a bicycle.

  When the vehicle is equipped with the simplified navigation device of the present invention, it is desirable to provide an operation member (the switch 115) for switching the voice guidance point, for example, on the steering wheel to improve operability.

  In the above-described embodiments and their modifications, all combinations of the embodiments or the embodiments and the modifications are possible.

  According to the above-described embodiment and its modifications, the following operational effects can be achieved. First, the simple navigation devices 101 to 103 have a communication circuit 111 that inputs voice guidance information from a center 201 at a plurality of voice guidance points on a guidance route from the current location to a destination, and a plurality of voices that are input by the communication circuit 111. A data memory 113 for storing voice guidance information at the guidance point in order from the current location; a switch 115 or a GPS receiver 117 for switching and selecting the voice guidance point; a voice circuit 112 for outputting voice guidance information by voice; A voice guidance information corresponding to the voice guidance point selected by switching by the switch 115 or the GPS receiver 117 is read from the data memory 113 and output from the voice circuit 112 by voice. , For exploring the guidance route to the destination It is not equipped with a road map database, a color display for displaying a map, a high-performance CPU that performs guidance route calculation and map display control, etc. Can be provided.

  Further, according to the above-described embodiment and its modification, the switch 115 that is manually operated by the user is provided, and when the switch 115 is operated by the user, the voice guidance point that is being selected is on the guidance route. By adopting a configuration for switching to the next voice guidance point, it is possible to provide the most inexpensive, small, and lightweight navigation device.

  Further, a GPS receiver 117 for detecting the current position is provided, and the CPU 110 determines whether the current position detected by the GPS receiver 117 is compared with the selected voice guidance point and passed through the selected voice guidance point. When the CPU 110 determines that the selected voice guidance point has been passed, it may be configured to switch from the selected voice guidance point to the next voice guidance point on the guidance route, and a small and inexpensive GPS. If the receiver 117 is adopted, the voice guidance point can be automatically switched, and the user's switching operation is not necessary, and the operability is improved.

  If the simplified navigation device includes the GPS receiver 117, the distance from the current position detected by the GPS receiver 117 to the selected voice guidance point is calculated and output by the voice circuit 112 as voice. More accurate voice guidance.

  Further, when the simple navigation device is provided with the timer 116, the distance from the voice guidance point to the next voice guidance point on the guidance route is calculated to estimate the required travel time between the two points. When the travel time between the two measured points exceeds the estimated travel time, a warning can be given by the voice circuit 112, and the possibility that the user has made a mistake on the road can be recognized more accurately. The guidance function can be further enhanced.

  Furthermore, by including road intersections, road junctions, and passing points on the guidance route as voice guidance points, detailed route guidance can be realized, and the user is accurately guided to the destination along the guidance route. Can do.

  The simplified navigation devices 101 to 103 according to one embodiment and its modified examples use the road map database 211 in the center 201 to search for a guidance route from the current location to the destination, and a plurality of voice guidance points on the guidance route. The voice guidance information for each voice guidance point is generated, and the communication circuit 111 of the simplified navigation devices 101 to 103 inputs voice guidance information at a plurality of voice guidance points on the guidance route from the center 201. Therefore, it is always possible to obtain an accurate guide route calculated by a high-performance CPU using the latest road map, and it is not necessary to update the road map in the simplified navigation device. In addition, conventional navigation devices use high-performance CPUs, color displays, road map databases such as DVDs and hard disks, but these new models appear in a short period of time, such as half a year or one year. It becomes obsolete in just a few years, and it is necessary to replace the navigation device itself. However, in the simplified navigation device of the present invention, a low-function CPU is sufficient, and voice guidance information for each voice guidance point on the guidance route is input and stored from the center 201, and is switched by the switch 115 or the GPS receiver 117. Because it is composed of only a limited function and simple device that utters voice guidance information by switching the voice guidance point with a trigger, it can be used for a long time without being affected by the rapid progress of technology and devices it can.

101, 102, 103; simple navigation device, 110; CPU, 111; communication circuit, 112; voice circuit, 113; data memory, 115; switch, 116; timer, 201; center, 300, 301;

Claims (3)

Input means for inputting voice guidance information at a plurality of voice guidance points on the guidance route from the current location to the destination from an external device;
Storage means for storing voice guidance information at the plurality of voice guidance points input by the input means in order from the current location;
An operation member for a user to switch and select the voice guidance point in the order;
An output means for outputting sound ;
When the operation member is operated by a user, the voice guidance points are switched and selected in the order, the voice guidance information corresponding to the selected voice guidance points is read from the storage unit, and the voice unit is voiced from the output unit. Control means for outputting ,
The control means has time measuring means, calculates a distance from the voice guidance point to the next voice guidance point in the order to estimate a required travel time between the two points, and the time measured by the time measuring means. A simple navigation device characterized in that a warning is output by voice from the output means when a passing time between points exceeds the estimated required passing time . The simple navigation device according to claim 1,
The simple navigation apparatus characterized in that the voice guidance point includes a road intersection, a road branch point, and a passing point on the guidance route. In the simple navigation apparatus according to claim 1 or 2,
The external device searches a guidance route from the current location to the destination using a road map database, extracts a plurality of voice guidance points on the guidance route, and generates voice guidance information for each voice guidance point And
The simplified navigation device, wherein the input means inputs the voice guidance information at a plurality of voice guidance points on the guidance route from the external device.

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