JP2021039020A - Communication terminal and computer program - Google Patents

Abstract

To provide a communication terminal and a computer program that enable the communication terminal to continue to provide appropriate information and guidance to a user by minimizing disadvantage to the user, even when the accuracy of the orientation detection result of the communication terminal is low.SOLUTION: A terminal is configured to acquire the detection results of the orientation of a communication terminal 1 using various sensors of the communication terminal 1 in a predetermined cycle, identify the orientation of a moving object (e.g., the user himself/herself or a vehicle) based on the acquired detection results, and identify the direction of the moving object to a specific direction when the accuracy of the acquired detection results is less than a threshold value.SELECTED DRAWING: Figure 3

Description

The present invention relates to a communication terminal and a computer program included in a mobile body.

Conventionally, in various communication terminals including mobile information terminals such as smartphones and mobile phones, navigation devices, personal computers, etc., GPS and magnetic sensors (electronic compass) have been used to enhance the functions that can be utilized and realized in the applications to be executed. It is equipped with various sensors such as a gyro sensor, an acceleration sensor, a proximity sensor, and an ambient light sensor. Of the information that can be detected by these various sensors, the current position and orientation of the communication terminal are of high importance that can be used in various situations, and it is desirable to detect them more accurately.

Here, in particular, GPS and magnetic sensors are used as sensors for detecting the current position and orientation of the communication terminal, but it is known that the accuracy of the detection results of these sensors deteriorates under specific circumstances. Therefore, in a situation where only a detection result with poor accuracy can be obtained, it is important what kind of processing is performed so as not to give a disadvantage to the user as much as possible. For example, in Japanese Patent Application Laid-Open No. 2009-109500, when an icon indicating the user's current position and orientation is displayed on a map image displayed on a mobile phone, the detection accuracy of the magnetic sensor is reduced due to the influence of an external magnetic field. It is disclosed that the display of the map image is fixed to the north up when it is located in.

JP-A-2009-109500 (pages 25-26, FIGS. 29-31)

Here, when displaying a map image around the user's current position as in Patent Document 1, in general, a heading-up display with the user's direction facing up is often selected. However, in the heading-up display, if the user's orientation is not stable when the detection accuracy of the user's orientation is low, the mark 101 indicating the user's current position and orientation is fixed as shown in FIG. The map image 102 rotates in small steps to the left and right, and the visibility of the map image deteriorates.

On the other hand, if the display of the map image is fixed to the north-up as in Patent Document 1, it is possible to prevent the rotation of the map image 102. However, on the other hand, as shown in FIG. 8, the mark 101 indicating the user's current position and orientation is rotated in small steps to the left and right, and it cannot be said that the visibility is sufficiently improved.

Furthermore, instead of using the coordinate data detected by GPS as it is to identify the user's current position, map matching processing is performed to correct the map information by drawing it onto the road. At that time, the user's orientation is changed. The pull-in (matching) is performed in consideration of the above. For example, as shown in FIG. 9, when the user's current position 105 is detected near the intersection of the link 103 and the link 104, if the detected user's orientation is in the direction along the link 103, the user's current position 105 Is pulled into the link 103, and if the detected user's orientation is in the direction along the link 104, the user's current position 105 is pulled into the link 104. Therefore, if the user's orientation is not stable when the detection accuracy of the user's orientation is low, the user's current position 105 may move alternately on the link 103 and the link 104. In Patent Document 1, the problem in the map matching process could not be solved.

The present invention has been made to solve the above-mentioned conventional problems, and even when the accuracy of the orientation detection result in the communication terminal is low, the user is not disadvantaged as much as possible. The purpose is to provide a communication terminal and a computer program that enable continuous provision of information and guidance to appropriate users.

In order to achieve the above object, the communication terminal according to the present invention is a communication terminal included in a mobile body, and the detection result of detecting the orientation of the communication terminal by using the detection device included in the communication terminal is acquired at a predetermined cycle. It has a detection result acquisition means and an orientation specifying means for specifying the orientation of the moving body based on the detection result acquired by the detection result acquisition means, and the orientation specifying means is provided by the detection result acquisition means. When the accuracy of the acquired detection result is less than the threshold value, the orientation of the moving body is specified as a specific orientation.
The "moving body" includes, for example, pedestrians, two-wheeled vehicles (including bicycles), automobiles, and the like. When the mobile body is a pedestrian, the "communication terminal provided by the mobile body" corresponds to the communication terminal possessed by the pedestrian. Further, when the moving body is an automobile or a two-wheeled vehicle, the communication terminal possessed by the occupant of the automobile or the two-wheeled vehicle is also applicable in addition to the communication terminal mounted on the automobile or the two-wheeled vehicle. Further, the "direction of the moving body" corresponds to the traveling direction of the moving body.
Further, "when the accuracy of the detection result is less than the threshold value" means, for example, if "the (valid) detection result can be obtained" is set as the threshold value, the detection result is "when the accuracy of the detection result is less than the threshold value". This applies when it cannot be acquired or when the acquired detection result is not valid. Further, for example, if "the number of effective sensors detected" is set as the threshold value, the number of effective sensors when the detection result is detected may be less than the predetermined number when "the accuracy of the detection result is less than the threshold value". Applicable. Further, for example, if "a numerical value indicating the reliability of the detection result" is set as a threshold value, the numerical value indicating the reliability of the detection result is less than a predetermined value (for example, 50%) when "the accuracy of the detection result is less than the threshold value". The case applies.

Further, the computer program according to the present invention includes a detection result acquisition means for acquiring a detection result of detecting the orientation of the communication terminal by using the detection device included in the communication terminal in a communication terminal included in the mobile body at a predetermined cycle. It is a computer program for functioning as an information specifying means for specifying the orientation of the moving body based on the detection result acquired by the detection result acquiring means. Further, when the accuracy of the detection result acquired by the detection result acquisition means is less than the threshold value, the information specifying means specifies the orientation of the moving body as the specific orientation.

According to the communication terminal and the computer program according to the present invention having the above configuration, even when the accuracy of the orientation detection result in the communication terminal is low, the orientation of the moving body can be specified as a specific orientation. , It is possible to minimize the influence of the decrease in the accuracy of the detection result. As a result, it is possible to continuously provide information and guidance to an appropriate user without causing any disadvantage to the user as much as possible.

It is a schematic block diagram which showed the navigation system which concerns on this embodiment. It is a block diagram which showed the structure of the communication terminal which concerns on this embodiment. It is a flowchart of the movement guidance processing program which concerns on this embodiment. It is a figure which showed the example of the detection result of the current position and direction of a communication terminal output from a communication terminal. It is a figure explaining the map matching process which specifies the current position of a user on a map. It is a figure explaining the map image display process which displays the map image around the user's current position. It is a figure explaining the route search process which searches for the recommended route to a destination. It is a figure explaining the problem of the prior art. It is a figure explaining the problem of the prior art.

Hereinafter, the communication terminal according to the present invention will be described in detail with reference to the drawings based on an embodiment embodied in the communication terminal 1 having a navigation function (hereinafter referred to as a navigation function). First, a schematic configuration of the navigation system 2 including the communication terminal 1 according to the present embodiment will be described with reference to FIG. FIG. 1 is a schematic configuration diagram showing a navigation system 2 according to the present embodiment.

As shown in FIG. 1, the navigation system 2 according to the present embodiment is basically composed of a server device 4 included in the information distribution center 3 and a communication terminal 1 owned by the user 5. Further, the server device 4 and the communication terminal 1 are configured to be able to send and receive electronic data to and from each other via the communication network 6. The communication terminal 1 includes, for example, a mobile phone, a smartphone, a tablet terminal, a personal computer, a navigation device, and the like. Further, the user 5 may be moving by a moving means such as a vehicle, or may not be moving.

Here, the server device 4 includes a DB that stores map information and traffic information, and when requested by the communication terminal 1, distributes the map information and traffic information of the corresponding area to the communication terminal 1. When the communication terminal 1 requests a route search, the route search from the designated departure point to the destination is performed, and the information regarding the searched guide route is distributed to the communication terminal 1. When there is a request for route search, only the corresponding map information and traffic information may be distributed to the communication terminal 1, and the route search process may be executed by the communication terminal 1. Further, the map information may not be distributed from the server device 4 to the communication terminal 1, but may be stored in advance in a storage means (memory or the like) possessed by the communication terminal 1.

On the other hand, as the communication terminal 1, an information terminal possessed by the user 5 and having a navigation function is used. When the communication terminal 1 is a smartphone or the like, a navigation application is installed. Here, the navigation function displays the route information that identifies the route searched by the server device 4, or obtains a map image from the server or stores the map data in the memory as a map image around the current position of the user 5. Applies to the function of displaying the current position of the user 5 in the displayed map image, and providing movement guidance along the set guidance route. It is not necessary for the communication terminal 1 to have all of the above navigation functions. The details of the communication terminal 1 will be described later.

In addition, the communication network 6 includes a large number of base stations located all over the country and a communication company that manages and controls each base station, and the base stations and communication companies are connected to each other by wire (optical fiber, ISDN, etc.) or wirelessly. It is configured by connecting. Here, the base station has a transceiver (transmitter / receiver) and an antenna for communicating with the communication terminal 1. Then, while the base station performs wireless communication between the communication companies, it becomes the terminal of the communication network 6 and relays the communication of the communication terminal 1 within the range (cell) where the radio wave of the base station can reach with the server device 4. Has a role to play.

Next, the schematic configuration of the communication terminal 1 owned by the user 5 will be described with reference to FIG. FIG. 2 is a block diagram schematically showing a control system of the communication terminal 1 according to the present embodiment. In the following, a case where the communication terminal 1 is a smartphone will be described as an example.

As shown in FIG. 2, the communication terminal 1 is a data bus BUS, a CPU 11, a memory 12 in which user information (user ID, name, etc.) and map information related to the user 5 possessing the communication terminal 1 are stored, and a communication network. The transmission / reception circuit unit (RF) 13 that transmits / receives signals to / from the base station of the network 6 and the RF (Radio Frequency) signal received by the transmission / reception circuit unit 13 are converted into a baseband signal, and the baseband signal is converted into an RF signal. Input operation consisting of a baseband processing unit 14 that converts to, an input / output unit 17 that is an interface between a microphone 15 and a speaker 16 and the like, a display 18 composed of a liquid crystal display panel and the like, a touch panel, hard buttons, and the like. It is configured by connecting the unit 19 and various sensors. Further, various sensors include, for example, GPS 20, a magnetic sensor 21, an acceleration sensor 22, a gyro sensor 23, and the like.

Here, the CPU 11 built in the communication terminal 1 is a control means of the communication terminal 1 that executes various operations according to an operation program stored in the memory 12, and constitutes the communication terminal ECU 25 together with the memory 12. Further, various processing contents of the communication terminal ECU 25 are displayed on the display 18 as needed. The communication terminal ECU 25 constitutes various means as a processing algorithm. For example, the detection result acquisition means acquires the detection result of detecting the orientation of the communication terminal 1 by using the detection device included in the communication terminal 1 at a predetermined cycle. The orientation specifying means identifies the orientation of the moving body (for example, the user himself / herself, the vehicle) based on the detection result acquired by the detection result acquiring means.

Further, the memory 12 is a storage medium in which user information (user ID, name, etc.) and the like related to the user 5 who owns the communication terminal 1 are stored. In addition, various application programs including the movement guidance processing program (FIG. 3) described later are also stored. Further, map information may be stored in the memory 12. If the map information is stored in the memory 12, it is possible to perform the process related to the route search not by the server device 4 but by the communication terminal 1. Further, the memory 12 may be configured by a hard disk, a memory card, or the like.

Further, the display 18 is arranged on one surface of the housing, and a liquid crystal display, an organic EL display, or the like is used. Then, various information such as a top screen for executing various applications installed on the communication terminal 1, screens related to the executed applications (Internet screen, mail screen, navigation screen, etc.), images, videos, etc. are displayed. Will be done. In particular, as the navigation screen displayed when the navigation application is executed, for example, a map image around the user's current position, a traveling guidance screen along the guidance route, and the like are displayed.

Further, the input operation unit 19 is composed of a touch panel provided on the front surface of the display 18, hard buttons arranged on the housing, and the like. Then, the communication terminal ECU 25 controls to execute various corresponding operations based on the electric signal output by pressing the touch panel or the hard button. The input operation unit 19 can also be configured by various keys such as a number / character input key, a cursor key for moving the cursor for selecting the displayed content, and a decision key for confirming the selection.

On the other hand, the various sensors connected to the communication terminal 1 include at least a sensor used to detect the current position and orientation of the communication terminal 1. For example, the GPS 20, the magnetic sensor 21, the acceleration sensor 22, and the gyro sensor 23 are connected to the communication terminal 1. In addition to the above sensors, for example, an ambient light sensor, a proximity sensor, a fingerprint sensor and the like may be provided.

Here, the GPS 20 makes it possible to detect the current position and the current time of the communication terminal 1 by receiving the radio waves generated by the artificial satellite. Further, the magnetic sensor 21 is a sensor that measures the current orientation (direction) of the communication terminal 1 by measuring the magnitude and direction of the magnetic field (magnetic field), and includes, for example, a Hall element sensor and an MR sensor. Further, the acceleration sensor 22 is a sensor that detects the acceleration generated in the communication terminal 1. Further, the gyro sensor 23 is a sensor that detects the angular velocity generated in the communication terminal 1. Then, the communication terminal 1 detects the current position and orientation of the communication terminal 1 at a predetermined cycle by combining any or a plurality of the above-mentioned various sensors, and outputs the detection result. Further, the communication terminal 1 uses the output current position and orientation detection result of the communication terminal 1 to perform various processes such as specifying the user's position in the navigation application. Details will be described later.

Subsequently, a movement guidance processing program executed by the CPU 11 in the communication terminal 1 having the above configuration will be described with reference to FIG. FIG. 3 is a flowchart of the movement guidance processing program according to the present embodiment. Here, the movement guidance processing program is executed after the navigation application is started on the communication terminal 1, and various guidances are provided using the detection results of the current position and orientation of the communication terminal 1 that are periodically output from the communication terminal 1. Is a program that executes. Further, the program shown in the flowchart in FIG. 3 below is stored in a memory 12 or the like included in the communication terminal 1 and executed by the CPU 11.

First, in the movement guidance processing program, in step 1 (hereinafter abbreviated as S) 1, the CPU 11 acquires the detection result of the current position and the orientation of the communication terminal 1 which is periodically output. Here, the communication terminal 1 periodically (for example, 1 sec cycle) detects the current position and direction (traveling direction) of the communication terminal 1 by using various sensors such as GPS 20, magnetic sensor 21, acceleration sensor 22, and gyro sensor 23. , The detection result is output each time. For example, FIG. 4 is a diagram showing an example of detection results of the current position and orientation of the communication terminal 1 output from the communication terminal 1.

As shown in FIG. 4, the detection result of the current position and orientation of the communication terminal 1 output from the communication terminal 1 includes latitude and longitude indicating the position coordinates of the communication terminal 1 and data indicating the orientation of the communication terminal 1. .. In addition to the current position and orientation of the communication terminal 1, data indicating the moving speed and acceleration may be further included. However, it is particularly effective when the communication terminal 1 is located in an area where GPS radio waves are difficult to reach, such as inside a building or underground, or in an area where the detection accuracy of the magnetic sensor is lowered due to the influence of an external magnetic field (that is,). Detection results (with sufficient accuracy above the threshold) may not be obtained. Even in that case, the detection result is output periodically, but the output data is the data indicating that the detection result is not valid (that is, the detection result with sufficient accuracy above the threshold value is not obtained). Become.

As shown in FIG. 4, when a valid orientation detection result of the communication terminal 1 cannot be obtained, the data is not valid for the orientation data (that is, a detection result with sufficient accuracy equal to or higher than the threshold value has not been obtained). "Invalid" is entered. However, even if the accuracy is low, not only "invalid" may be input but also the detected numerical value may be input. Further, if the data is not valid for the directional data, the data itself may not be output. Moreover, the reliability of the data may be indicated by, for example, a percentage instead of the choice of valid or invalid. In addition, the reliability of the data may be indicated by the number of effective sensors.

Next, in S2, the CPU 11 determines whether or not the detection result of the current position and the orientation of the communication terminal 1 acquired in S1 is obtained, which is particularly effective for the orientation (that is, with sufficient accuracy equal to or higher than the threshold value). judge. For example, in the example shown in FIG. 4, if "invalid" is not input in the directional data, it is determined that a valid detection result has been obtained. Alternatively, when the orientation data includes a percentage indicating the reliability and the number of effective sensors, the effective detection result is obtained when those values are equal to or more than the threshold value (for example, the reliability is 50% or more and two or more effective sensors). May be determined to have been obtained.

Then, when it is determined that the detection result of the current position and the direction of the communication terminal 1 acquired in S1 is particularly effective for the direction (S2: YES), the process proceeds to S3. On the other hand, when it is determined that a valid detection result for the direction is not obtained (S2: NO), the process proceeds to S4.

In S3, the CPU 11 specifies the direction of the communication terminal 1 acquired in S1 as the user's direction (corresponding to the user's traveling direction). When the user is in the vehicle, the direction of the vehicle (corresponding to the traveling direction of the vehicle) is specified. After that, it shifts to S7.

Next, in S4, has the CPU 11 obtained a detection result that is valid for the direction (that is, with sufficient accuracy equal to or higher than the threshold value) even once in the past from the time when the currently running navigation application is started to the present time? Judge whether or not.

Then, if it is determined that a valid detection result for the direction has been obtained even once in the past from the time when the currently running navigation application is started to the present time (S4: YES), the process proceeds to S5. To do. On the other hand, if it is determined that no valid detection result for the direction has been obtained in the past from the time when the currently running navigation application is started to the present time (S4: NO), Move to S6. However, even if a valid detection result for the orientation has been obtained in the past (S4: YES), a considerable amount of time has passed (for example, 5 minutes or more has passed) or a considerable distance since the last valid detection result was obtained. When moving (for example, moving by 300 m or more), there is a high possibility that the direction of the communication terminal 1 has changed from that time, so the shift to S6 may be performed.

In S5, the CPU 11 determines the direction of the communication terminal 1 included in the latest (most recent) detection result among the valid detection results for the directions acquired from the time when the currently running navigation application is started to the present time. Is specified in the user's direction (corresponding to the user's direction of travel). When the user is in the vehicle, the direction of the vehicle (corresponding to the traveling direction of the vehicle) is specified. After that, it shifts to S7.

On the other hand, in S6, the CPU 11 specifies the northward direction as the user's direction (corresponding to the user's traveling direction). When the user is in the vehicle, the direction of the vehicle (corresponding to the traveling direction of the vehicle) is specified. After that, it shifts to S7. In S6, if the direction can be fixed, it is not always necessary to face north, and for example, it may face south or east. However, in countries in the Northern Hemisphere where it is common to have the north facing up when displaying a map, it is desirable to face north. On the other hand, in countries in the Southern Hemisphere, it is desirable to face south.

Next, in S7, the CPU 11 executes various processes in the navigation application based on the user's direction (traveling direction) specified in S3, S5 or S6. For example, in the following, (A) a map matching process that identifies the user's current position on a map, (B) a map image display process that displays a map image around the user's current position, and (C) a recommended route to the destination. The route search process to be searched will be described as an example.

(A) Map matching process for specifying the current position of the user on the map When performing the map matching process for specifying the current position of the user on the map, the orientation of the user specified in S3, S5 or S6 is taken into consideration. And pull it into the road. For example, as shown in FIG. 5, when the user's current position 33 is detected near the intersection of the link 31 and the link 32, if the detected user's orientation is in the direction along the link 31, the user's current position 33 is If the user's orientation is drawn to the link 31 and the detected user's orientation is along the link 32, the user's current position 33 is drawn to the link 32. Here, even when the detection accuracy of the user's orientation is low, the user's orientation is set to the same orientation as the previous one or a fixed orientation (S5, S6), so that the user's current position alternates between the link 31 and the link 32. It can be prevented from moving.

(B) Map image display process for displaying a map image around the user's current position When performing a map image display process for displaying a map image around the user's current position, the user specified in S3, S5 or S6. A mark indicating the user's current position and orientation is displayed on the map image based on the orientation of. The map image may be displayed by heading up or north up. For example, as shown in FIG. 6, a mark 41 indicating the user's current position and orientation is displayed on the map image 42 on the display 18. Here, even when the detection accuracy of the user's direction is low, the user's direction is set to the same direction as the previous time or a fixed direction (S5, S6). It can be prevented from rotating. In addition, it is possible to prevent the mark 41 from rotating left and right in small steps in the north-up display.

(C) Route search process for searching for a recommended route to a destination When performing a route search process for searching for a recommended route to a destination, the orientation of the user specified in S3 is exceptionally used, but S5. Or, it is not used for the user's orientation specified in S6. For example, when searching for a recommended route from the current position of the user 51 shown in FIG. 6 to the destination 52, the recommended route 53 differs depending on whether the user 51 is facing north or south. Here, if a direction different from the actual user direction is specified in a state where the detection accuracy of the user's direction is low, there is a possibility that a route different from the recommended route to the actual destination will be searched. In particular, in the example shown in FIG. 6, if the direction of the actual user is specified to be north even though the direction is south, a detour route is searched for compared to the actual recommended route, which is not suitable for the user. The profit will increase. Therefore, when the detection accuracy of the user's direction is low, the route search to the destination is performed without including the user's direction in the search condition. For example, in the example shown in FIG. 6, if the user's direction is not included in the search condition, the same recommended route as when the user's direction is facing south is searched, and the actual user's direction is assumed to be north. Even so, it is possible to minimize the disadvantage to the user.

As described in detail above, in the communication terminal 1 and the computer program executed in the communication terminal 1 according to the present embodiment, the detection result of detecting the orientation of the communication terminal 1 by using various sensors included in the communication terminal 1 is detected in a predetermined cycle. (S1), and the direction of the moving object (for example, the user or the vehicle) is specified based on the acquired detection result (S3). On the other hand, if the accuracy of the acquired detection result is less than the threshold value, the moving object is specified. (S5, S6), even if the accuracy of the orientation detection result on the communication terminal is low, it can be detected by specifying the orientation of the moving object to the specific orientation. It is possible to minimize the effect of reduced accuracy of the result. As a result, it is possible to continuously provide information and guidance to an appropriate user without causing any disadvantage to the user as much as possible.

It should be noted that the present invention is not limited to the above-described embodiment, and it goes without saying that various improvements and modifications can be made without departing from the gist of the present invention.
For example, in the present embodiment, an example applied when the user's orientation is used in the navigation application installed on the communication terminal 1 has been shown, but when the orientation of the moving body is used even in an application program other than the navigation application, It can be applied in the same way.

Further, in the present embodiment, it is assumed that the accuracy of the detection result is less than the threshold value that the valid detection result cannot be obtained from the communication terminal 1 in S1, but the number of effective sensors when the detection result is detected is increased. The case where the number is less than a predetermined number, or the case where the numerical value indicating the reliability of the detection result is less than the threshold value may be the case where the accuracy of the detection result is less than the threshold value.

Further, in the present embodiment, an example in which the communication terminal 1 is applied to a smartphone has been described, but it may be applied to other types of terminals as long as it has a function of performing some processing using the user's orientation. It is possible. For example, it can be applied to mobile phones, tablet terminals, personal computers, navigation devices, and the like.

Further, although the embodiment in which the communication terminal according to the present invention is embodied has been described above, the communication terminal can also have the following configuration, and in that case, the following effects are obtained.

For example, the first configuration is as follows.
A detection result acquisition that is a communication terminal (1) included in the mobile body (5) and acquires the detection result of detecting the orientation of the communication terminal by using the detection device (20 to 23) included in the communication terminal at a predetermined cycle. The means (11) and the direction specifying means (11) for specifying the direction of the moving body based on the detection result acquired by the detection result acquisition means, and the direction specifying means has the detection result. When the accuracy of the detection result acquired by the acquisition means is less than the threshold value, the orientation of the moving body is specified as a specific orientation.
According to the communication terminal having the above configuration, even when the accuracy of the orientation detection result in the communication terminal is low, the accuracy of the detection result is lowered by specifying the orientation of the moving object to a specific orientation. It is possible to minimize the impact. As a result, it is possible to continuously provide information and guidance to an appropriate user without causing any disadvantage to the user as much as possible.

The second configuration is as follows.
A communication terminal (1) on which a navigation application is installed, and the movement of the moving body using the direction of the moving body (5) specified by the direction specifying means (11) while the navigation application is executed. Guidance will be given.
According to the communication terminal having the above configuration, when the movement guidance of the moving body in the navigation application is performed, the direction of the moving body is specified even when the accuracy of the direction detection result in the communication terminal is low. By specifying the orientation, it is possible to minimize the influence of the decrease in the accuracy of the detection result on the movement guidance. As a result, it is possible to continue the movement guidance without causing any disadvantage to the user as much as possible.

The third configuration is as follows.
A map image display means (11) for displaying a map image (42) around the moving body, and a mark display means (11) for displaying a mark (42) for identifying the current position and orientation of the moving body on the map image. ), And the mark display means displays the mark using the direction of the moving body specified by the direction specifying means.
According to the communication terminal having the above configuration, even in a situation where the accuracy of the orientation detection result on the communication terminal is low, by specifying the orientation of the moving object to a specific orientation, for example, the map image can be displayed left and right in the heading-up display. It is possible to prevent it from rotating in small steps. In addition, it is possible to prevent the mark from rotating in small steps from side to side in the north-up display.

The fourth configuration is as follows.
It has a route search means (11) for searching a route from the current position of the moving body to a destination, and the route search means has an accuracy of the detection result acquired by the detection result acquisition means (11) less than a threshold value. In the case of, the route from the current position of the moving body to the destination is searched without using the orientation of the moving body.
According to the communication terminal having the above configuration, in a situation where the accuracy of the direction detection result in the communication terminal is low, it is a big inconvenience to the user by preventing the detour route from being searched as compared with the actual recommended route. It is possible to prevent giving a profit.

The fifth configuration is as follows.
The specific direction is northward.
According to the operation terminal having the above configuration, even when the accuracy of the orientation detection result in the communication terminal is low, the accuracy of the detection result is lowered by specifying the orientation of the moving object in the north direction. It is possible to minimize the impact. In particular, in countries in the northern hemisphere where it is common to turn the north up when displaying a map, the orientation of the moving object will turn up at the start of displaying the map image, which may give the user a sense of discomfort. Can be prevented.

The sixth configuration is as follows.
The specific orientation is the orientation of the moving body (5) specified based on a valid detection result acquired by the detection result acquisition means (11) in the past.
According to the operation terminal having the above configuration, even when the accuracy of the orientation detection result in the communication terminal is low, the accuracy of the detection result is obtained by specifying the orientation of the moving object in the same orientation as in the past. It is possible to minimize the effect of the reduction. Further, in a situation where there is little change in direction, such as when the moving body is stopped or going straight along the road, there is a high possibility that the correct direction can be specified.

The seventh configuration is as follows.
The specific orientation is the orientation of the moving body (5) specified based on the valid detection result recently acquired by the detection result acquisition means (11).
According to the operation terminal having the above configuration, even when the accuracy of the direction detection result in the communication terminal is low, the direction of the moving body is specified by specifying the direction of the moving body to be the same as the latest direction. It is possible to minimize the influence of the decrease in the accuracy of the detection result without moving the detection result more than necessary. Further, in a situation where there is little change in direction, such as when the moving body is stopped or going straight along the road, there is a high possibility that the correct direction can be specified.

1 Communication terminal 2 Navigation system 3 Information distribution center 4 Server device 5 User 11 CPU
12 memory 20 GPS
21 Magnetic sensor 22 Accelerometer 23 Gyro sensor 25 Communication terminal ECU

Claims (8)

It is a communication terminal that a mobile body has.
A detection result acquisition means for acquiring a detection result of detecting the orientation of the communication terminal using a detection device included in the communication terminal at a predetermined cycle,
It has an orientation specifying means for specifying the orientation of the moving body based on the detection result acquired by the detection result acquiring means.
The orientation specifying means is a communication terminal that specifies the orientation of the moving body to a specific orientation when the accuracy of the detection result acquired by the detection result acquiring means is less than the threshold value. A communication terminal with a navigation app installed
The communication terminal according to claim 1, wherein the movement guidance of the moving body is performed using the direction of the moving body specified by the direction specifying means in a state where the navigation application is executed. A map image display means for displaying a map image around the moving body, and
It has a mark display means for displaying a mark that identifies the current position and orientation of the moving body on the map image.
The communication terminal according to claim 2, wherein the mark display means displays the mark using the direction of the moving body specified by the direction specifying means. It has a route search means for searching a route from the current position of the moving body to the destination.
When the accuracy of the detection result acquired by the detection result acquisition means is less than the threshold value, the route search means searches for a route from the current position of the moving body to the destination without using the orientation of the moving body. The communication terminal according to claim 2 or 3. The communication terminal according to any one of claims 1 to 4, wherein the specific direction is northward. The communication terminal according to any one of claims 1 to 4, wherein the specific orientation is the orientation of the moving body specified based on a valid detection result acquired by the detection result acquisition means in the past. The communication terminal according to claim 6, wherein the specific orientation is the orientation of the moving body specified based on a valid detection result recently acquired by the detection result acquisition means. The communication terminal of the mobile body,
A detection result acquisition means for acquiring a detection result of detecting the orientation of the communication terminal using a detection device included in the communication terminal at a predetermined cycle,
A computer program for functioning as an information specifying means for specifying the orientation of the moving body based on the detection result acquired by the detection result acquiring means.
The information specifying means is a computer program that specifies the orientation of the moving body to a specific orientation when the accuracy of the detection result acquired by the detection result acquiring means is less than a threshold value.