JP4914630B2 - Car navigation system - Google Patents

Description

  The present invention relates to an in-vehicle navigation device using hybrid navigation that uses both self-contained navigation and GPS navigation mounted on a vehicle such as an automobile, and more particularly, the present position calculated by self-contained navigation and the GPS navigation. In an in-vehicle navigation device having a learning function that stores a correction value that is calculated based on an error from the current position and is used for correction when calculating the current position by self-contained navigation, the in-vehicle navigation device is installed in another vehicle. The present invention relates to an in-vehicle navigation device that can reset a learned correction value when corrected.

  Conventionally, as a vehicle-mounted navigation device, in order to detect the current position of a vehicle, a GPS navigation that receives radio waves from a GPS satellite and calculates the current position and a self-contained navigation that calculates the current position using a vehicle speed sensor or a gyro sensor There is provided a navigation device using hybrid navigation that uses both of the above and the above.

  In recent years, in-vehicle navigation devices using hybrid navigation with a function of correcting the current position obtained by self-contained navigation using the current position calculated by GPS navigation have become widespread.

  Further, a plurality of errors between the current position calculated by the GPS navigation and the current position calculated by the self-contained navigation are stored as correction values used for correction at the time of calculating the current position in the self-contained navigation, and the situation is selected from the plurality of correction values. A navigation device that uses a correction value suitable for the above has also been proposed.

  For example, the following Patent Document 1 (Japanese Patent Laid-Open No. 2005-69873) discloses a navigation device that can display the current position with high accuracy by reducing the error of the self-contained navigation even when the tire is replaced with a tire having a different outer diameter. Has been. That is, the navigation device determines that the tire has been replaced with a tire having a different outer diameter when an error in the current position calculated by the self-contained navigation and the GPS navigation is equal to or greater than a predetermined distance. Is switched to a learning data storage unit suitable for the current position, and the current position is corrected using the data (correction value).

Further, in the following Patent Document 2 (Japanese Patent Laid-Open No. 2005-300287), it is determined that the navigation device is placed in a different vehicle, and navigation that automatically switches a memory that stores a learning value (correction value). An apparatus is disclosed. That is, this navigation device compares the unique data of the autonomous navigation unit provided in the vehicle with the unique data stored in the RAM of the navigation device, or the current position when the power of the navigation device is turned on. By comparing with the current position stored in the RAM of the navigation device, it is determined that the navigation device is placed in a different car, and the memory for storing the learning value (correction value) is automatically switched. It is composed.
JP 2005-69873 A (paragraphs [0004] to [0012], FIG. 4) Japanese Patent Laying-Open No. 2005-300277 (paragraphs [0007] to [0010], FIGS. 2 and 4)

  In the navigation device described in Patent Document 1, the current position calculated by the self-contained navigation is compared with the current position calculated by the GPS navigation, and a correction value for correcting the current position calculated by the self-contained navigation is learned. In addition, since the current position is calculated by adding a correction value to the output by self-contained navigation by learning, it is possible to calculate the current position with high accuracy.

  However, in the navigation device disclosed in Patent Document 1, when the device is detached and attached to another vehicle, there is a problem that the current location is significantly different due to correction by the learning value.

  In the navigation device described in Patent Document 2, when it is determined that the navigation device is mounted on a different vehicle, the memory for storing the learning value is automatically switched, but the previous learning value is old. In some cases, the learning value stored in the memory is not always optimal, and there is a problem that it is inconvenient for a user who wants to immediately set a new learning value, which is not always convenient. It wasn't good. In addition, there is a user request to change a preset user setting.

  The inventor of the present application has conducted various studies to solve the above problems, and as a result, calculated based on the error between the current position calculated by the self-contained navigation and the current position calculated by the GPS navigation. Storage means for storing a correction value used for correction at the time of calculating the current position is determined, whether or not the in-vehicle navigation device has been removed from the vehicle, and based on the determination result determined to have been removed from the vehicle, the storage The present invention has been completed by conceiving that the above-mentioned problems can be solved if a guide for whether or not to reset the correction value stored in the means is displayed.

  That is, the present invention has an object to solve the above-described problems, and can display a guidance as to whether or not a user resets a correction value used for correction when calculating the current position by self-contained navigation. The object is to provide a navigation device.

  In order to achieve the above-described object, in the present invention, self-contained navigation that is detachably mounted on a vehicle and calculates a current position based on vehicle traveling information that is output information from a vehicle speed sensor and a gyro sensor, A vehicle-mounted navigation device that uses GPS navigation that calculates a current position based on information from a satellite, based on an error between the current position calculated by the self-contained navigation and the current position calculated by the GPS navigation Storage means for storing a correction value that is calculated and used for correction at the time of calculating the current position by the self-contained navigation, a determination means that determines whether or not the in-vehicle device has been removed from the vehicle, and a vehicle by the determination means Display means for displaying guidance as to whether or not to reset the correction value stored in the storage means based on the determination result determined to have been removed from the power supply, and a power supply Instruction means for instructing to turn on, the display means based on the determination result determined to have been removed from the vehicle by the determination means when the instruction means instructs to turn on the power, the storage means A guide for whether or not to reset the correction value stored in is displayed.

  The invention according to claim 2 of the present application is characterized in that the determination means determines whether or not the in-vehicle navigation device is removed from the vehicle based on the presence or absence of a connection relationship with a power supply source of the vehicle. To do.

  The invention according to claim 3 of the present application is characterized in that the display means displays a guidance as to whether or not to reset a preset user setting.

  In the invention according to claim 1, the vehicle is detachably mounted on the vehicle, and the self-contained navigation for calculating the current position based on the traveling information of the vehicle, which is output information from the vehicle speed sensor and the gyro sensor, and information from the satellite A vehicle-mounted navigation device that uses GPS navigation to calculate the current position based on the current position, calculated based on an error between the current position calculated by the self-contained navigation and the current position calculated by the GPS navigation, Storage means for storing a correction value used for correction at the time of calculating the current position by the self-contained navigation, determination means for determining whether or not the in-vehicle device has been removed from the vehicle, and removal from the vehicle by the determination means Based on the determined determination result, display means for displaying a guidance as to whether or not the correction value stored in the storage means is to be reset, and an instruction to turn on the power And the display means is stored in the storage means based on the determination result determined to have been removed from the vehicle by the determination means when the instruction means instructs to turn on the power. To display whether or not to reset the correction value

  Therefore, when the in-vehicle navigation device is removed from the vehicle and placed on a different vehicle, guidance on whether or not to reset the correction value stored in advance based on the determination result determined to have been removed from the vehicle is provided. When the user can reset the desired correction value, and when the in-vehicle navigation device is removed from the vehicle and placed on a different vehicle, and the power-on is instructed. Based on the determination result determined to have been removed from the vehicle, it is possible to display a guidance as to whether or not to reset a correction value stored in advance, and the user can reset a desired correction value. .

  In the invention according to claim 2, the determination means determines whether or not the in-vehicle navigation device has been removed from the vehicle based on the presence or absence of a connection relationship with the power supply source of the vehicle. Therefore, the user can reset a desired correction value.

  In the invention concerning Claim 3, a display means displays the guidance of whether to reset the preset user setting. Therefore, the user can reset a desired correction value and can reset a preset user setting.

  Hereinafter, specific examples of the present invention will be described in detail with reference to examples and drawings. However, the embodiment shown below exemplifies a vehicle-mounted navigation device for embodying the technical idea of the present invention, and is not intended to specify the present invention as this vehicle-mounted navigation device. The present invention is equally applicable to the in-vehicle navigation device of other embodiments included in the claims.

  FIG. 1 is a block diagram showing a configuration of an in-vehicle navigation device according to an embodiment of the present invention. As shown in FIG. 1, the in-vehicle navigation device 10 includes a control unit 11, a GPS positioning unit 12, a self-contained navigation positioning unit 13, a display unit 14, an input unit 15, a storage unit 16, and a power supply detection unit 17. ing.

  The control unit 11 is configured mainly with a microprocessor, and includes a memory such as a RAM and a ROM, as in a general computer device, and controls each unit by a program stored in the memory.

  The GPS positioning unit 12 includes a GPS receiver and the like, receives radio waves from GPS satellites, measures the current position, and outputs measurement data to the control unit 11.

  The self-contained navigation positioning unit 13 includes a vehicle speed sensor 13-1 and a gyro sensor 13-2. The vehicle speed sensor 13-1 detects a pulse generated every time the vehicle axle rotates by a certain angle, and is generated at a predetermined time. The moving speed of the vehicle is detected based on the number of pulses. The gyro sensor 13-2 detects the traveling direction of the vehicle using geomagnetism. The self-contained navigation positioning unit 13 outputs the moving speed and the traveling direction detected by the vehicle speed sensor 13-1 and the gyro sensor 13-2 to the control unit 11.

  The display unit 14 is configured by a color displayable liquid crystal display module or the like, and the map information stored in the storage unit 16 on the display screen, the current position calculated by the GPS positioning unit 12 or the self-contained navigation positioning unit 13. Alternatively, a reset item such as a learning value described later can be displayed based on the control of the control unit 11.

  The input unit 15 includes soft key buttons and a touch panel displayed on the display screen of the display unit 13, mechanical switches arranged around the display screen, and the like. Can be input by the user.

  The storage unit 16 includes an error learning value storage unit 16-1, a map information storage unit 16-2, an initial setting storage unit 16-3, and a user setting storage unit 16-4. 16-1 stores a learning value to be described later, and the map information storage unit 16-2 stores map information downloaded in advance by communication or preinstalled from a DVD or CD. The map information includes data representing each road as a node and a link, the type of each link (general road, highway, etc.), the node type (existence of intersection signal, etc.), cost data, and the like.

  The initial setting storage unit 16-3 stores various information set in an initial state where the in-vehicle navigation device 10 is not used by the user, and the user setting storage unit 16-4 is set by the user. Various kinds of information are stored.

  The power supply detection unit 17 detects whether or not it is connected to a power supply source such as a generator or a battery mounted on the vehicle, and outputs the detection result to the control unit 11.

  Here, the control unit 11 calculates the current position based on the moving speed and the traveling direction input from the self-contained navigation positioning unit 13 and the learning value stored in the error learning value storage unit 16-1, and the GPS positioning unit. 12 is compared with the current position measured by 12, and an optimum learning value is obtained so that the current position measured based on the output of the autonomous navigation positioning unit 13 and the current position measured by the GPS positioning unit 12 are the same. The obtained optimum learning value is stored in the error learning value storage unit 16-1.

  In addition, when the position information of the destination is input by the input unit 15, the control unit 11 automatically selects an optimum route from the current position to the destination and creates a guide route, and the GPS positioning unit 12 and The self-contained navigation positioning unit 13 detects the current position and current direction of the vehicle. This method of automatically selecting the optimum route is performed by a known method called a Dijkstra method, for example.

  Then, the map information including the current position of the vehicle is read from the map information storage unit 16-2, a map image around the vehicle position is drawn on the display unit 14 based on the map information, and the vehicle position mark (location ) Is superimposed on the display screen of the display unit 14 and the map image is scroll-displayed according to the movement of the vehicle, or the map image is fixed on the screen and the vehicle position mark is moved. You can see at a glance whether you are driving.

  Further, the map information storage unit 16-2 displays a guidance of a route downloaded or preinstalled from the route search server, for example, when a vehicle approaches an intersection or a branch point, “Further left turn” is displayed. Voice guidance data is stored, and the control unit 11 can display guidance (guide) on the display unit 14 according to the guidance data and can guide voice via a speaker (not shown).

  And the control part 11 once memorize | stores in the memory the detection result whether it is connected with power supply sources, such as a generator mounted on the vehicle input from the power supply detection part 17, or a battery. Then, when it is detected that the detection result stored in the memory is not connected to the power supply source in response to the power-on instruction input by the input unit 15, that is, the in-vehicle navigation device 10 is from the vehicle. When it is determined that it has been removed, the learning value stored in the error learning value storage unit 16-1 and the guidance on whether or not to reset the user setting value stored in the user setting storage unit 16-4 Is displayed on the display unit 14.

  As a result, the user can reset a desired correction value before the navigation device 10 is activated, and can reset a preset user setting.

  FIG. 2 is a diagram for explaining a display screen in the in-vehicle navigation device according to the present invention. 2A, when the control unit 11 detects that the detection result stored in the memory is not connected to the power supply source according to the power-on instruction input by the input unit 15, The display screen of the display part 14 which displayed the guidance of whether the content of the memory | storage part 16 is reset is shown. 2B is stored in the error learning value storage unit 16-1 in response to the selection of the “1. YES” option from the display screen of FIG. The display screen of the display part 14 which displayed the guidance of whether to reset the learned value etc. currently displayed is shown.

  In FIG. 2B, when the user selects the item “1. User setting”, the user setting value stored in the user setting storage unit 16-4 is reset, and the item “2. Learning value” is reset. When the user selects, the learning value stored in the error learning value storage unit 16-1 is reset, and when the user selects the item “3. Return to initial value”, the error learning value storage unit 16-1 and the user The contents of the storage unit 16 including the setting storage unit 16-4 are reset (initialized).

  Next, an operation procedure in the in-vehicle navigation device according to the present invention will be described.

  FIG. 3 is a flowchart illustrating an operation procedure in the in-vehicle navigation device according to the present embodiment.

  In the flowchart of FIG. 3, the control unit 11 determines whether or not a power-on instruction is given from the input unit 15 by the user in step S <b> 30, and if there is a power-on instruction, the process proceeds to step S <b> 31. If not, the process returns to step S30. Next, in step S31, the control unit 11 determines whether the power supply detection unit 17 has been disconnected from the external power supply. When it is determined that there has been an interruption, the control unit 11 proceeds to step S32 and determines that there has been no interruption. Then, the process proceeds to step S35.

  Next, in step S32, the control unit 11 displays a reset item on the display unit 14. In step S33, it is determined whether or not a reset item has been selected. If a reset item has been selected, the process proceeds to step S34 to reset the reset item. If no item is selected, step S34 is skipped and the process proceeds to step S35.

  In step S34, the user setting value stored in the user setting storage unit 16-4 is reset according to the item selected in step S33, the learning value stored in the error learning value storage unit 16-1 is reset, Alternatively, the contents of the storage unit 16 including the error learned value storage unit 16-1 and the user setting storage unit 16-4 are reset (initial setting reading), and the process proceeds to step S35.

  On the other hand, in step S35, a navigation operation is performed. In step S36, it is determined whether or not the user has instructed to turn off the power from the input unit 15. If there is an instruction to turn off the power, the process proceeds to step S37. If not, the process returns to step S35.

  Then, the control unit 11 determines whether or not the power supply detection unit 17 is disconnected from the external power supply in step S37, and proceeds to step S38 if it is determined that the power supply detection unit 17 is disconnected from the external power supply. In step S38, the fact that the external power supply is cut off is stored in the memory and the process is terminated. If it is determined in step S37 that the external power supply is not cut off, step S38 is skipped and the process is terminated.

  As described above in detail, according to the vehicle-mounted navigation device 10 according to the present invention, it is detected and stored whether or not the navigation device 10 has been removed from the vehicle, and then mounted on the vehicle and turned on. In this case, it is possible to display a guidance as to whether or not to reset the learning value before the on-vehicle navigation device 10 is activated, and the user can reset the desired learning value.

  In the present embodiment, the vehicle-mounted navigation device and the route search server device have been described as a stand-alone vehicle-operated navigation device, but the present invention is not limited to a stand-alone navigation system. The present invention can also be applied to a communication-type navigation system in which a navigation device and a route search server device are connected via the Internet.

  According to the present invention, a correction value desired by a user can be reset. Therefore, the convenience of the user can be improved and highly accurate navigation information can be provided, and therefore, it is useful as an in-vehicle navigation device that provides a service suitable for the user's needs.

It is a block diagram which shows the structure of the vehicle-mounted navigation apparatus concerning the Example of this invention. It is a figure explaining the display screen in the vehicle-mounted navigation apparatus concerning this invention. It is a flowchart which shows the operation | movement procedure in the vehicle-mounted navigation apparatus concerning a present Example.

Explanation of symbols

10. Car navigation device 11 ... Control unit 12 ... GPS positioning unit 13 ... Self-contained navigation positioning unit 13-1 ... Vehicle speed sensor 13-2 ... Gyro Sensor 14 ... Display unit 15 ... Input unit 16 ... Storage unit 16-1 ... Error learning value storage unit 16-2 ... Map information storage unit 16-3 ... Initial setting storage unit 16-4 ... User setting storage unit 17 ... Power supply detection unit

Claims (3)

Detachably mounted to the vehicle, GPS for calculating the self-contained navigation to calculate the current position based on the travel information of the vehicle which is the output information from the vehicle speed sensor and di Yairosensa, the current position based on information from the satellite An in-vehicle navigation device that uses navigation in combination,
Storage means for storing a correction value that is calculated based on an error between the current position calculated by the self-contained navigation and the current position calculated by the GPS navigation and is used for correction at the time of calculating the current position by the self-contained navigation;
Determining means for determining whether or not the in-vehicle device is removed from the vehicle;
Display means for displaying a guidance as to whether or not to reset the correction value stored in the storage means based on the determination result determined to have been removed from the vehicle by the determination means;
An instruction means for instructing to turn on the power,
Whether the display means resets the correction value stored in the storage means based on the determination result determined to have been removed from the vehicle by the determination means when the instruction means instructs to turn on the power. A vehicle-mounted navigation device that displays such guidance. The in-vehicle navigation device according to claim 1, wherein the determination unit determines whether or not the in-vehicle navigation device has been removed from the vehicle based on the presence or absence of a connection relationship with a power supply source of the vehicle. . The in-vehicle navigation apparatus according to any one of claims 1 to 2, wherein the display unit displays a guidance as to whether or not to reset a preset user setting.

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