JP2019144195A - Navigation device and route introduction stoppage method - Google Patents

Abstract

To provide a navigation device and route introduction stoppage method that prevent introduction of guide routes from being suddenly stopped despite user's intentions when users need the introduction thereof, and can reduce cumbersome procedures as much as possible when the user stops the introduction thereof by a voice.SOLUTION: A navigation device 1 comprises a route introduction stoppage control unit 13 that, when a voice command instructing a stoppage of introduction of guide routes in the middle of introducing the guide routes is recognized, causes the introduction of the guide route to be stopped when an apart distance between a site which a user used to arrive at by a vehicle and the vehicle is equal to or less than a prescribed distance, and ask the user whether it is OK to stop the introduction of the guide route when a situation is other than a case where the apart distance is equal to or less than the prescribed distance. Only when the distance between the site which the user used to arrive at by the vehicle and the vehicle is sufficiently near, the introduction of the guide route is stopped without asking the user.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a navigation device and a route guidance stop method, and in particular, is suitable for use in a navigation device and a route guidance stop method that allow a user to command and stop a route guide being executed by voice. .

  Conventionally, in a navigation device that guides a guide route to a destination, a user can stop guiding route guidance by uttering an utterance command instructing stop of guidance route guidance. It has been known. When a conventional navigation device recognizes an utterance command instructing to stop guidance route guidance, the user does not immediately stop guidance route guidance, but determines whether the guidance route guidance may be temporarily stopped. In response to the inquiry, if there is a response from the user instructing to stop guidance route guidance, guidance route guidance is stopped. This is the case when the collected voice includes an utterance command accidentally, or the utterance command is recognized even though the user does not utter the utterance command due to voice recognition failure In addition, the guidance route guidance is prevented from stopping against the user's intention.

  In Patent Document 1, when a user instructs execution of a predetermined process by voice, the predetermined process may be executed from the viewpoint of safety or the like in view of the situation where the vehicle is placed. It is determined whether or not it is appropriate. If it is not appropriate, an apparatus that does not execute the predetermined processing is described.

JP 2017-087950 A

  However, in the conventional navigation device, when the user utters an utterance command instructing to stop guidance route guidance, the user is always inquired whether guidance route guidance should be stopped. However, it was troublesome for the user because it was necessary to perform work to respond to it. In order to solve this problem, it is also possible to adopt a configuration in which guidance of the guidance route is stopped without making an inquiry when an utterance command that instructs to stop guidance of the guidance route is recognized. However, in this case, the utterance command is mistakenly recognized even if the collected voice includes an utterance command accidentally or the user does not utter the utterance command due to voice recognition failure. Even if it has been, the guidance route guidance will be stopped uniformly. For this reason, there is a possibility that the guidance route guidance may suddenly stop against the user's intention even when the user needs guidance guidance, such as when driving in a land where the user is not very familiar, There is a problem that a situation may occur in which the user is shaken due to an unintentional stop of guidance on the guidance route.

  The present invention has been made to solve such a problem, and when the user needs to guide the guidance route, the guidance route guidance is prevented from suddenly stopping against the user's intention. However, it is an object of the present invention to reduce as much as possible the troublesomeness of the user when the user stops the guidance route guidance by voice instruction.

  In order to solve the above-described problem, the navigation device according to the present invention is configured to guide a user through a vehicle in the past when an utterance command instructing to stop guidance of a guidance route is recognized while guiding the guidance route. If the distance between the point where the vehicle has arrived and the vehicle is equal to or less than the predetermined distance, the guidance route guidance is stopped. In other cases, the user is asked whether guidance route guidance may be stopped. Contact

  When the guidance route is being guided, if the user has arrived by a vehicle in the past and the separation distance from the vehicle is sufficiently close, the vehicle is around the point where the user has visited in the past. It is assumed that the user knows the situation of the road around the vehicle and does not require guidance for the guidance route for the user. Conversely, in cases other than this, it is assumed that the user does not fully understand the situation of the road around the vehicle and the user needs guidance on the guidance route. The Based on this, according to the present invention configured as described above, guidance is automatically performed without inquiring of the user only when it is assumed that the user is not required to guide the guidance route. Since the route guidance is stopped, it is possible to prevent the guidance route guidance from being suddenly stopped against the user's intention when the user needs guidance route guidance. In addition, according to the present invention configured as described above, when it is assumed that the guidance route guidance is not necessary for the user, the user instructs to stop guidance route guidance by voice. In this case, the guidance route guidance is automatically stopped without inquiring the user, and in this case, it is not necessary for the user to respond to the inquiry. Can be reduced.

It is a block diagram which shows the function structural example of the navigation apparatus which concerns on one Embodiment of this invention. It is a flowchart which shows the operation example of the navigation apparatus which concerns on one Embodiment of this invention.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a diagram showing a block diagram showing a functional configuration example of a navigation device 1 according to the present embodiment, together with a sound collection device 2, an audio output device 3, and a touch panel 4 provided in a vehicle. The navigation device 1 according to the present embodiment is a device mounted on a vehicle, and searches for a function for detecting the position of the vehicle and a route to a destination set by a user (hereinafter referred to as “guidance route”). It has a function to guide. In the present embodiment, the navigation device 1 will be described as a device mounted on a vehicle. However, the navigation device 1 does not have to be a device fixedly attached to the vehicle. Tablet computer, notebook computer, etc.). In this embodiment, it is assumed that the driver of the vehicle is a user.

  The sound collection device 2 collects a user's utterance voice by a microphone and outputs it as a voice signal. The sound output device 3 outputs sound based on the sound signal through a speaker in response to the input of the sound signal. The touch panel 4 includes a display panel 4a (a liquid crystal panel, an organic EL panel, etc.) provided at a position visible to the driver such as a center portion of the dashboard, and a touch sensor 4b disposed on the display panel 4a. Is provided.

  As shown in FIG. 1, the navigation device 1 includes a host vehicle position detection unit 10, a guidance route guide unit 11, a voice recognition unit 12, and a route guidance stop control unit 13 as functional configurations. Each of the functional blocks 10 to 13 can be configured by any of hardware, DSP (Digital Signal Processor), and software. For example, when configured by software, each of the functional blocks 10 to 13 is actually configured by including a CPU, RAM, ROM, etc. of a computer, and stored in a recording medium such as RAM, ROM, hard disk, or semiconductor memory. Is realized by operating. In addition, the navigation device 1 includes a map data storage unit 20 as storage means. The map data storage unit 20 stores map data 20a. The map data 20a includes map display data used when displaying a map, and road data (information relating to road network links and nodes) used for route search.

  The own vehicle position detection unit 10 detects the current position of the vehicle based on inputs from various sensors. The various sensors include a GPS unit that detects the position and orientation of the vehicle on the map, a sensor (sensor, acceleration sensor, etc.) that detects the relative orientation of the vehicle, a vehicle speed sensor that detects the speed of the vehicle, and the like. Composed.

  The guidance route guide unit 11 is a route (guidance route) to the destination set by the user based on the map data 20a stored in the map data storage unit 20 and the current position of the vehicle detected by the vehicle position detection unit 10. And guide the guidance route. The guidance route guide unit 11 displays a map around the vehicle on the display panel 4a, and adds an image that clearly indicates the position of the vehicle and an image that clearly indicates the guidance route on the map. invite.

  In the present embodiment, the user can register “home” as a destination candidate in advance. When a pre-registered home is set as a destination by the user, the guidance route guidance unit 11 searches for a guidance route from the current position of the vehicle to the home and performs guidance route guidance.

  The voice recognition unit 12 recognizes a voice collected by the sound collection device 2 and recognizes an utterance command corresponding to the voice. More specifically, in the navigation device 1, a voice pattern for each utterance command is registered in advance. The utterance command is a word that instructs the navigation device 1 (which may be another device under the control of the navigation device 1) to execute a specific process. , It is possible to cause the navigation device 1 to execute a specific process corresponding to the one utterance command without causing a physical action on the navigation device 1. For example, the utterance command is “map display” instructing to display a map around the vehicle, “searching for a registered guidance route to the home, and guidance of the searched guidance route” , “Nearby convenience stores” that instruct to search for convenience stores existing around the vehicle. In the present embodiment, the guidance command includes “route deletion” instructing to stop guidance route guidance when guidance route guidance unit 11 performs guidance route guidance. Hereinafter, this utterance command is particularly referred to as a “route erase command”.

  The voice recognition unit 12 continuously analyzes the voice signal input from the sound collection device 2, and the voice pattern represented by the voice signal (the voice pattern of the word spoken by the user) and the utterance command registered in advance. It is monitored whether the similarity with any one of the voice patterns is equal to or higher than a predetermined threshold. When the voice recognition unit 12 detects that the similarity between the voice pattern represented by the voice signal and the voice pattern of the one utterance command is equal to or greater than a predetermined threshold, the voice recognition unit 12 Is recognized as an utterance command. If the recognized utterance command is a route deletion command, the voice recognition unit 12 notifies the route guidance stop control unit 13 that the route deletion command has been recognized.

  Although details are omitted, when the speech recognition unit 12 recognizes an utterance command other than the route deletion command, the navigation device 1 appropriately executes a process corresponding to the recognized utterance command.

  The route guidance stop control unit 13 executes the following processing when the voice recognition unit 12 recognizes a route deletion command. When the user utters the route deletion command, the guidance route guidance unit 11 basically guides the guidance route. When the route recognition command is recognized by the voice recognition unit 12, the route guidance stop control unit 13 does not guide the guidance route by the guidance route guidance unit 11 (the user erases the route by mistake or unintentionally). When a command is spoken), the following processing is not executed.

  The route guidance stop control unit 13 determines whether the destination of the guidance route being guided by the guidance route guidance unit 11 is a pre-registered home or another point. When the destination of the guide route is a point other than the home registered in advance, the route guidance stop control unit 13 inquires of the user whether the guide of the guide route may be stopped. In the present embodiment, the route guidance stop control unit 13 displays on the display panel 4a a word confirming whether or not the guidance route guidance stop such as “Are you sure to delete the route?” A touch button that is operated when instructing execution of the guidance route stop and a touch button that is operated when canceling the stop are displayed.

  Furthermore, the route guidance stop control unit 13 causes the voice output device 3 to output a voice message that confirms whether or not the guidance route guidance stop may be executed, such as “Are you sure to delete the route?”. When the user stops the guidance route guidance, the user touches the corresponding touch button on the touch panel 4 or performs a predetermined word (for example, “delete”) that causes the guidance route guidance stop. Speak. On the other hand, when canceling the guidance route guidance stop, the user touches the corresponding touch button on the touch panel 4 or utters a predetermined word (for example, “do not erase”) instructing the cancellation. When the user utters voice, the voice is recognized by the voice recognition unit 12, and the recognition result is notified to the route guidance stop control unit 13.

  After inquiring the user whether or not guidance on the guidance route can be stopped, the route guidance stop control unit 13 monitors whether or not the user has responded to the inquiry, and if there is a response, the response Is a response for instructing execution of guidance route stop or a response for instructing cancellation of the stop. When the user response is a response instructing execution of guidance route stop, the route guidance stop control unit 13 instructs the guidance route guide unit 11 to stop guidance route guidance. On the other hand, when the user response is a response instructing cancellation of guidance route guidance stop, the route guidance stop control unit 13 does not stop guidance route guidance of the guidance route guidance unit 11. In this case, the guidance route guidance unit 11 continues to guide the guidance route.

  On the other hand, when the destination of the guidance route being guided by the guidance route guidance unit 11 is a pre-registered home, the route guidance stop control unit 13 informs the guidance route guidance unit 11 of information indicating the position of the home (hereinafter “home”). The home position information is acquired by requesting a response of “position information”. Next, the route guidance stop control unit 13 determines the density level of roads around the home based on the acquired home position information and the map data 20a stored in the map data storage unit 20. The density level is an index indicating the magnitude of the density of roads around the home by a predetermined level. In the present embodiment, as the density level value, a large level, a medium level, and a small level are prepared in descending order of density. The density of roads around the home is the density of roads around the home. In general, the density of roads tends to be higher in urban areas than in rural areas.

  The processing of the route guidance stop control unit 13 when determining the density level will be described in detail. The route guidance stop control unit 13 is based on the acquired home position information and the map data 20a stored in the map data storage unit 20. A road that is within a predetermined size range around the home is recognized. Next, the route guidance stop control unit 13 calculates the total value of the lengths of all roads in a predetermined size range centered on the home. There is a positive correlation between the density of roads in an area of a certain size on the map and the total distance of the roads in the area (= total length of all roads belonging to the area) The greater the total distance, the greater the density of the road. Therefore, the calculated total value can be used as an index representing the magnitude of road density in a predetermined size range (around the home) centered on the home.

  Then, the route guidance stop control unit 13 determines that the density level is a large level when the total value is equal to or greater than the first threshold, and the total value is smaller than the first threshold and equal to or greater than the second threshold (<first threshold). In this case, it is determined that the density level is a medium level, and when the total value is smaller than the second threshold, it is determined that the density level is a low level.

  After determining the density level as described above, the route guidance stop control unit 13 determines the value of the comparison target distance (corresponding to “predetermined distance” in the claims) based on the value of the density level. In this embodiment, the first value, the second value, and the third value (provided that the first value <the second value <the third value) are prepared as candidates for the comparison target distance value, and the route guidance stop control is performed. When the density level is high, the unit 13 sets the value of the comparison target distance as the first value, and when the density level is medium, the value of the comparison target distance is set as the second value and the density level is low. In this case, the value of the comparison target distance is set as the third value. As described above, the route guidance stop control unit 13 decreases the value of the comparison target distance as the density of roads around the home increases, and conversely as the density of roads around the home decreases. Increase the value of.

  Next, the route guidance stop control unit 13 compares the separation distance between the vehicle and the home based on the home position indicated by the acquired home position information and the current position of the vehicle detected by the vehicle position detection unit 10. It is determined whether or not it is less than the distance. The route guidance stop control unit 13 instructs the guidance route guide unit 11 to stop guidance route guidance when the distance between the vehicle and the home is equal to or less than the comparison target distance. As a result, the guidance route guidance by the guidance route guidance unit 11 is automatically stopped according to the recognition of the route deletion command. On the other hand, when the separation distance between the vehicle and the home exceeds the comparison target distance, the route guidance stop control unit 13 inquires of the user whether or not the guidance route guidance may be stopped. The route guidance stop control unit 13 executes the process related to the inquiry and the process corresponding to the response to the inquiry in the above-described procedure.

  As described above, in the present embodiment, when the route recognition command is recognized by the voice recognition unit 12, the route guidance stop control unit 13 determines that the guidance route being guided by the guidance route guidance unit 11 is a registered home. If the distance between the vehicle and the home is equal to or less than the comparison target distance, the guidance route guidance unit 11 stops guiding the guidance route, otherwise, Ask the user if they can stop guiding the route. This configuration has the following effects. In the present embodiment, the home corresponds to a “specific point” in the claims.

  In other words, when a guidance route with a destination registered in advance as a destination is being guided, and the separation distance between the vehicle and the home is sufficiently close, the user grasps the route from the current position of the vehicle to the home. Therefore, it is assumed that the guidance route guidance is not necessary. On the other hand, cases other than “when a guide route with a destination registered in advance as a destination is guided and the distance between the vehicle and the home is sufficiently close” are as follows. That is, this is a case where the destination of the guide route is a point other than the registered home or the distance between the vehicle and the home of the home where the destination of the guide route is registered is large. In such a case, the user may not be fully aware of the situation of the road around the current position of the vehicle, and the user is likely to need guidance for the guidance route. It is assumed that there is.

  Based on the above, according to the above configuration, since the user is not inquired only when it is assumed that the guidance route guidance is not necessary, the user needs guidance route guidance. In this case, the guidance route guidance can be prevented from suddenly stopping against the user's intention. In addition, according to the above configuration, when it is assumed that the guidance route guidance is not necessary for the user, the user instructs the user to stop guidance route guidance by voice. In this case, there is no need for the user to respond to the inquiry and the user's troublesomeness can be reduced.

  Furthermore, in this embodiment, the route guidance stop control unit 13 decreases the value of the comparison target distance as the density of the roads around the home increases according to the density of the roads around the home. That is, the route guidance stop control unit 13 does not make an inquiry only when the route deletion command is recognized at a position closer to the home when the density of the roads around the home is high, compared to the case where the density is low. , Stop guiding route guidance. This configuration has the following effects.

  In other words, in a situation where the home and the vehicle are separated by a certain distance, the greater the density of roads around the home, the more road options that can be selected to reach the home, and the route tends to become more complicated. It is assumed that there is a high possibility that the user does not grasp the route from the current position of the vehicle to the home. Therefore, the higher the density of roads around the home, the more the user knows the route to the home when the vehicle is closer to the home. Based on this, as a configuration of the present embodiment, the comparison target distance (predetermined distance) may be a constant distance regardless of the density level, but according to the above configuration, the density of roads around the home is The larger the value, the smaller the distance to be compared, so that the guidance route to the home can be prevented from suddenly stopping when the user does not know the route to the home more accurately. Is preferable.

  Next, the operation of the navigation device 1 will be described. FIG. 2 is a flowchart showing an operation example of the navigation device 1. The flowchart of FIG. 2 shows processing executed by the navigation device 1 when a route deletion command is recognized by the voice recognition unit 12 in a situation where guidance route guidance is being performed by the guidance route guidance unit 11. .

  As shown in FIG. 2, the voice recognition unit 12 of the navigation device 1 continuously analyzes the voice signal input from the sound collection device 2, and recognizes the route deletion command when the route includes a route deletion command. (Step SA1). When the voice recognition unit 12 recognizes the route deletion command, the voice recognition unit 12 notifies the route guidance stop control unit 13 of that.

  The route guidance stop control unit 13 determines whether or not the destination of the guidance route being guided by the guidance route guidance unit 11 is a pre-registered home (step SA2). If the destination of the guidance route is not a pre-registered home (step SA2: NO), the route guidance stop control unit 13 inquires of the user whether or not guidance on the guidance route may be stopped (step SA3). As described above, in the present embodiment, an inquiry to the user is made by displaying information on the display panel 4a and outputting sound by the sound output device 3.

  After the inquiry, the route guidance stop control unit 13 monitors whether or not the user has responded to the inquiry (step SA4). When there is a response (step SA4: YES), the route guidance stop control unit 13 determines whether or not the response is a response instructing execution of guidance route stop (step SA5). When the user response is a response instructing execution of guidance route stop (step SA5: YES), the route guidance stop control unit 13 instructs the guidance route guide unit 11 to stop guidance route guidance. Then, the guidance route guidance is stopped (step SA6). On the other hand, when the user's response is not a response instructing execution of the guidance route guidance stop, in other words, when the user response is a response instructing cancellation of the guidance route guidance stop (step SA5). : NO), the route guidance stop control unit 13 does not stop the guidance route guidance of the guidance route guidance unit 11 (step SA7). In this case, the guidance route guidance unit 11 continues to guide the guidance route.

  On the other hand, when the destination of the guidance route is a pre-registered home (step SA2: YES), the route guidance stop control unit 13 determines the density level of the road around the home (step SA8). Next, the route guidance stop control unit 13 determines the value of the comparison target distance based on the value of the density level (step SA9). Next, the route guidance stop control unit 13 determines whether or not the separation distance between the vehicle and the home is equal to or less than the comparison target distance (step SA10).

  When the separation distance between the vehicle and the home is equal to or smaller than the comparison target distance (step SA10: YES), the guidance route guidance unit 11 is instructed to stop guidance route guidance, and guidance route guidance is stopped. On the other hand, when the separation distance between the vehicle and the home exceeds the comparison target distance (step SA10: NO), the route guidance stop control unit 13 proceeds to step SA3. The processing after step SA3 is as described above.

  As mentioned above, although one embodiment of the present invention has been described, the above-described embodiment is merely an example of implementation in practicing the present invention, and thus the technical scope of the present invention is limitedly interpreted. It must not be done. That is, the present invention can be implemented in various forms without departing from the gist or the main features thereof.

  For example, in the above-described embodiment, the route guidance stop control unit 13 is a route whose destination is the home where the guidance route is registered in advance when the route recognition command is recognized by the voice recognition unit 12, and When the separation distance between the home and the vehicle is equal to or smaller than the comparison target distance, the guidance route guidance is stopped without making an inquiry. In this regard, when the guidance guidance stop control unit 13 determines that the distance between the current position of the vehicle and the home is equal to or less than the comparison distance regardless of whether the destination of the guidance route is a pre-registered home. However, the guidance route guidance may be stopped without making an inquiry. Even in this case, only when the current position of the vehicle is close enough to the user's home and the user is aware of the road conditions around the vehicle, the guidance route is not asked. Since this guidance is stopped, the same effects as those described in the above-described embodiment can be obtained.

  In addition, regarding the above points, the guidance guidance stop control unit 13 indicates that the current position of the vehicle and that the user has arrived by the vehicle in the past regardless of whether the destination of the guidance route is a pre-registered home. When the separation distance from a specific point that is a certain point is equal to or smaller than the comparison target distance, the guide route guidance may be stopped without making an inquiry. In this configuration, “a point that the user has set as a destination in the past” can be set as a specific point. For example, if the navigation device 1 has a function of registering a point set by the user as a destination and providing the registered point as a destination candidate later according to the user's instruction, the registered point Each can be a specific point.

  Here, the vicinity of the point where the user has arrived by the vehicle in the past is a place where the user has actually visited in the past, and it is assumed that the user knows the road condition. Therefore, when the vehicle is located around the point, it is assumed that the guidance route guidance is not necessary for the user. Based on this, according to the above configuration, the guidance route guidance is stopped without making an inquiry only when the user is assumed to know the situation of the road around the vehicle. The effect similar to the effect demonstrated by embodiment is produced.

  Further, in the above-described embodiment, the density around the home is divided into three levels according to the size of the density, and the value of the comparison target distance is prepared according to the density level in advance. The guidance stop control unit 13 is configured to perform processing in the order of specifying the density level and determining the comparison target distance according to the density level. In this regard, the method for determining the value of the comparison target distance is not limited to the exemplified method. For example, the configuration may be such that the value of the comparison target distance is determined using a predetermined calculation formula. In the above-described embodiment, the density of roads around the home is defined using the total distance of roads in a certain size area. For example, the density of roads is defined as roads in a certain size area. You may define by other methods, such as the ratio which the area of occupies, and the number of road links. Further, the comparison target distance may be a fixed value regardless of the density level.

DESCRIPTION OF SYMBOLS 1 Navigation apparatus 2 Sound collecting apparatus 11 Guidance route guide part 12 Voice recognition part 13 Route guidance stop control part

Claims (7)

A speech recognition unit that recognizes speech collected by the sound collection device and recognizes an utterance command corresponding to the speech;
A guidance route guide for guiding the guidance route;
The user has arrived by the vehicle in the past when the voice recognition unit recognizes the utterance command instructing to stop the guidance route guidance while the guidance route guidance unit is guiding the guidance route. If the distance between the specific point and the vehicle is less than or equal to the predetermined distance, the guidance route guidance unit stops guidance of the guidance route, and otherwise, guidance of the guidance route is stopped. A route guidance stop control unit that asks the user whether or not to do so,
A navigation device comprising:   The navigation device according to claim 1, wherein the specific point includes a point registered in advance as a home by the user. The route guidance stop control unit
When the speech command for instructing the guidance route to stop is recognized by the voice recognition unit, the guidance route is a route whose destination is a pre-registered home, and the specific point When the distance between the home and the vehicle is equal to or less than a predetermined distance, guidance of the guidance route by the guidance route guidance unit may be stopped, and guidance of the guidance route may be stopped otherwise. The navigation apparatus according to claim 2, wherein the user is inquired about whether or not.   The navigation device according to any one of claims 1 to 3, wherein the specific point includes a point that the user has set as a destination in the past. The route guidance stop control unit
The navigation device according to any one of claims 1 to 4, wherein a value of the predetermined distance is decreased as a density of roads around the specific point is increased. The route guidance stop control unit
The navigation apparatus according to claim 5, wherein the density of roads around the specific point is determined to be higher as the total distance of roads within the predetermined range including the specific point is larger. A step of recognizing the voice collected by the sound collection device during guidance of the guidance route by the guidance route guidance unit and recognizing an utterance command corresponding to the voice;
The route guidance stop control unit of the navigation device recognizes the utterance command instructing the voice recognition unit to stop the guidance route guidance when the guidance route guidance unit is guiding the guidance route. In the case where the distance between the specific point where the user has arrived by the vehicle in the past and the vehicle is equal to or smaller than the predetermined distance, the guidance route guidance unit stops guiding the guidance route, otherwise In the case of inquiring the user whether or not to stop the guidance route,
The route guidance stop method characterized by including.