JP5166857B2 - Navigation device - Google Patents

Description

  The present invention relates to an in-vehicle navigation device having an energy-saving driving support function that supports energy-saving driving in consideration of fuel efficiency, and in particular, rapid acceleration based on information acquired from various sensors and positioning means by the navigation device. The present invention relates to a navigation device that identifies deceleration and identifies whether or not sudden acceleration / deceleration is an appropriate operation depending on the position of a vehicle in a traveling guide route.

  Conventionally, there are known navigation devices and navigation systems that guide a user by searching for a route from a desired departure point to a destination using map data and road data. Such navigation devices and navigation systems are known. As a car navigation device that is installed in a car and guides the route to the driver, a mobile phone is used as a navigation terminal to send a route search request to the route search server, receive the result, and receive route guidance Navigation systems have been put into practical use.

  The car navigation device uses a GPS (Global Positioning System), receives GPS signals transmitted from a plurality of GPS satellites orbiting the earth with a GPS antenna, The position is specified by analyzing the satellite position and clock information included in the signal. At least four GPS satellites are required. The single positioning accuracy of GPS is generally over 10 m, but it is improved to 5 m or less by adopting DGPS (Differential GPS).

  The navigation device includes a road network database for route search. This road network database includes roads (routes) of map data, node data with nodes such as knots and inflection points as nodes, link data with routes connecting each node as links, and cost information for all links. Link cost data having (distance and required time) is accumulated. The navigation device refers to this database and sequentially searches for a link from the starting node to the destination node, and traces the node having the smallest cost information of the link and the link as a guide route, thereby shortening the shortest. Search and guide the route. As a route search method using such a database, a method called label determination method or Dijkstra method is used.

  Recently, the effective use of the global environment and energy resources has become a major issue, suppressing the deterioration of the global environment caused by exhaust gas from driving a car and preventing inappropriate consumption of energy resources. A system for being considered. Such a function can be called an energy-saving driving support function.For example, when data indicating the driving situation is collected from the vehicle and there is a driving situation in which the consumption of energy such as fuel becomes inappropriate, A system for reporting statistically or in real time has been proposed.

  Such a system having an energy saving driving support function is disclosed as a vehicle operation management system in, for example, the following Patent Document 1 (Japanese Patent Laid-Open No. 2003-316864). The vehicle operation management system disclosed in Patent Document 1 includes an information center that collects data indicating a driving situation from a vehicle. Each vehicle is provided with a control circuit, which acquires vehicle information such as speed and engine speed from various sensors and transmits it to the information center. The information center analyzes the current driving state of the vehicle from the vehicle information and issues an instruction to protect the energy saving operation when the energy saving operation is not executed. The control circuit displays an instruction from the information center on the display.

For example, the following items are set as conditions determined that the energy-saving operation is not performed. In other words, when the engine speed is higher than the speed, that is, the engine speed is high even though the engine is running at a low speed, or the engine speed frequently increases despite a small speed change. If this occurs, sudden acceleration / deceleration frequently occurs if the engine speed is high or the engine is idling for a long period of time even if the mileage does not increase, or if a shift position suitable for the speed is not selected. In this case, the vehicle speed is high, the shift position changes frequently in a short time, or the accelerator opening changes frequently in a short time. Similarly, it is possible to incorporate functions that support safe driving.
JP2003-316864A (FIG. 1, paragraphs [0015] and [0016])

  However, a navigation device placed on a vehicle has a limited outer size for securing a placement space and a forward field of view, and thus the size of a display unit is also limited. If a large number of current positions and other information are displayed in this limited display area, the display of each piece of information becomes small, and the necessary information may be overlooked.

  As a result of various studies to solve the above problems, the inventor of the present application has displayed the current position mark even when the driving state of the vehicle is displayed on an existing navigation device for assisting driving. The present invention has been completed by conceiving that the current position can be readily recognized as the running state by changing the value according to the running state of the vehicle.

  That is, an object of the present invention is to solve the above-described problems, and an object of the present invention is to provide a navigation device that can easily recognize a driving state.

In order to solve the above-mentioned problems, the invention according to claim 1 of the present application includes a current position detecting unit that receives a radio wave from a GPS satellite and detects a current position every predetermined time, and a map storage unit that stores map information And a control means for reading out map information corresponding to the current position from the map storage means and displaying it on the display means together with a current position mark indicating the current position.
The navigation device is further based on an output of a traveling state detection unit that detects a traveling state of the vehicle on which the navigation device is mounted by calculating an acceleration based on the current position detected by the current position detecting unit. Driving status determination means for determining whether or not appropriate driving is performed,
Storage means for storing the current position detected by the current position detection means and the determination result detected by the running state detection unit;
The control means changes the display form of the current position mark based on the determination of the driving situation determination means, and further, when the display instruction of the current position and the determination result stored in the storage means is made, the storage means The current position and the determination result stored in the display unit are read out, and the current position mark is displayed on the map information stored in the map storage unit corresponding to the current position in a display form based on the determination result stored in the storage unit. It displays on the said display means, It is characterized by the above-mentioned.

The invention according to claim 2 of the present application is the navigation device according to claim 1,
When an instruction to display the current position and the determination result stored in the storage unit is given, the control unit reads the current position and the determination result in the order stored in the storage unit.

According to the first aspect of the present invention, current position detecting means for receiving a radio wave from a GPS satellite and detecting the current position every predetermined time, map storage means for storing map information, and map information corresponding to the current position And a control means for displaying the current position mark on the display means together with a current position mark indicating the current position. The navigation device further includes a current position detected by the current position detection means. A driving situation in which it is determined whether or not an appropriate driving is performed based on an output of a driving state detecting unit that detects a driving state of the vehicle on which the navigation device is mounted by calculating an acceleration based on a position. comprising a determination unit, a storage unit in which the current position detecting means and the running state detecting unit and the current position detected stores the determination result of detection, before Control means changes the display form of the current position mark on the basis of the determination of the driving condition determining means, further, if the display instruction of the determination result and the current position stored in the storage unit is made, in the storage means The stored current position and determination result are read out, and the current position mark is displayed on the map information stored in the map storage means corresponding to the current position in a display form based on the determination result stored in the storage means. Display on the display means.

According to such a configuration, without providing a display area of the dedicated, it can recognize the current running state. Also, without using an acceleration sensor, for example, a portable
Even if it is a vigination device, it becomes possible to detect a running state. In addition, after traveling, the traveling state can be confirmed together with the traveling locus.

In the invention according to claim 2, in the navigation device according to claim 1, when an instruction to display the current position and the determination result stored in the storage unit is given, the control unit stores the storage unit in the storage unit. The current position and the determination result are read in the order in which they are performed.

  Hereinafter, specific examples of the present invention will be described in detail with reference to examples and drawings. However, the embodiments shown below exemplify a navigation device for embodying the technical idea of the present invention, and are not intended to specify the present invention for this navigation device. The present invention is equally applicable to navigation devices of other embodiments included in the scope.

FIG. 1 is a block diagram showing a configuration of a navigation apparatus 10 according to an embodiment of the present invention. The navigation device 10 includes a control unit 11, GPS receiving unit 12, a map storage unit 13, a display unit 14, input unit 16, the route storage unit 17, the traveling locus recording unit 18, is configured to include a voice output unit 19 Yes.

  The GPS receiving unit 12 is a positioning unit that receives signals transmitted from a plurality of GPS satellites and calculates the current position based on latitude and longitude, and determines the current position of the automobile on which the navigation device 10 is mounted for a predetermined time. Positioning is performed at intervals. The map storage unit 13 stores a map and network data (node, link, link cost) for route search.

  The display unit 14 is a display unit composed of a liquid crystal display unit or the like, and displays a map and a guidance route. The map and guide route displayed on the display unit 14 are displayed centering on the current position measured by the GPS receiving unit 12, and scrolled as the current position advances on the route. When the current position is in front of an intersection on the guidance route (predetermined distance), guidance such as the traveling direction (straight, right turn, left turn) of the intersection is displayed on the display unit 14 or a voice constituted by a speaker or the like. Or output via the output unit 19.

  The input unit 16 is an input means including a numeric keypad, character input keys, function keys, a touch panel, and the like, and the input unit 16 is a selection key for selecting an item on the menu screen displayed on the display unit 14 and a cursor key. It has.

  The control unit 11 is a control circuit composed of a microprocessor, and includes a ROM and a RAM (not shown). The ROM stores a program for controlling the operation of each part. For example, the program for the route search by the control unit 11 and the acceleration of the vehicle on which the navigation device 10 is mounted are detected and compared with predetermined threshold values provided on the plus side (during acceleration) and the minus side (during deceleration), respectively. It is determined whether or not a driving operation that causes rapid acceleration / deceleration has been performed.If it is determined that the acceleration is abrupt, the current position mark indicating the current position is `` red ''. The program is stored so that the current position mark is “yellow”, and when it is not determined that the acceleration / deceleration is sudden, “blue” is displayed on the display unit 14. Therefore, the control unit 11 includes the acceleration determination unit 111 and the route search unit 112.

The acceleration determination unit 111 calculates the acceleration based on the current position measured by the GPS receiving unit 12 at a predetermined interval and the speed obtained from the positioning time interval. That is, for example, if the GPS receiver 12 measures the position every second and the speed between AB and BC is 5 m / sec and 10 m / sec, respectively, acceleration a = (V−Vo) / t = 10−5 / 1 = 5 m / sec ² ”, it is determined that acceleration is positive when the acceleration is positive, and deceleration is negative when the acceleration is negative, and the calculated acceleration exceeds the threshold (rapid acceleration / deceleration is performed) Or not).

  That is, in the present invention, when there is an acceleration change exceeding a predetermined threshold, it is determined that the vehicle is inappropriately accelerated or decelerated, and whether or not an appropriate driving operation is performed can be identified, and effective energy saving is achieved. You will be able to provide driving assistance.

  The route search unit 112 refers to the route search network data stored in the map storage unit 13 according to the route search conditions such as the departure point and the destination input from the input unit 16 and guides the optimum route. Explore as. Information on the guidance route searched by the route search unit 112 and guidance information for each intersection node are stored in the route storage unit 17, the guidance route is displayed on the display unit 14, and voice guidance is performed via the voice output unit 19.

  The map displayed on the display unit 14 is acquired (read out) from a predetermined range of map information centered on the current position or from the map storage unit 13, and a predetermined color corresponding to the determination of sudden acceleration / deceleration at the center of the display screen Will display the current position mark.

The travel locus recording unit 18 stores the current position measured every time the current position is measured by the GPS receiving unit 12 and the determination result determined by the acceleration determination unit 111 at that time in association with each other. To do. When the user inputs a travel locus display instruction via the input unit 16 , the current position and the determination result are read in the order stored based on the instruction of the control 11, and the control unit 11 displays map information as the travel locus. The current position mark is sequentially displayed on the display unit 14 in a color corresponding to the determination result in the order stored together.

  Next, the operation procedure of the navigation device according to the embodiment of the present invention will be described based on the flowchart of FIG. First, when the current position is measured by the GPS receiving unit 12 in the process of step S11, the acceleration determining unit 111 in the process of step S12 is changed to the current position measured in the process of step S11 and the current position measured in the process of step S11. Based on this, the acceleration is calculated.

  When the acceleration is calculated by the process of step S12, in the process of step S13, it is determined whether or not sudden acceleration has been performed by comparing the acceleration calculated by the acceleration determination unit 111 with a positive threshold. If it is determined here that rapid acceleration has been performed (Y in step S13), as a process in step S14, the control unit 11 displays the current position mark on the display unit 14 in red.

  On the other hand, if it is determined in step S13 that rapid acceleration has not been performed (N in step S13), in step S15, acceleration determination unit 111 performs rapid deceleration by comparing with a negative threshold. It is determined whether or not. If it is determined that sudden deceleration has been performed (Y in step S15), the control unit 11 displays the current position mark on the display unit 14 as "yellow" as the process in step S16.

  On the other hand, if it is determined in step S15 that rapid deceleration is not performed (N in step S15), the acceleration determination unit 111 determines that neither rapid acceleration nor rapid deceleration is performed, and the control unit 11 The current position mark is displayed in “blue” on the display unit 14.

  When the current position mark is displayed in a color corresponding to each in steps S14, S16, and S17, in the process of step S18, the control unit 11 determines the current position measured in step S11 and the steps S13 and S15. The determination result is associated and recorded in the travel locus recording unit 18.

  In step S19, the control unit 11 determines whether or not the current position has reached the destination. If the current position has not reached (N in step S19), the control unit 11 reaches the destination from step S11 to step S19. When the current position reaches the destination (Y in step S19), the process is terminated.

  In addition, when the user gives an instruction to display a travel locus via the input unit 16, the control circuit 11 records the current position stored in the travel locus recording unit 18 and the sudden acceleration / deceleration determination result at that time. It reads in order and displays the current position mark together with the map information on the display unit 14 in a color corresponding to the determination result.

  By configuring in this way, the user can confirm the location and the number of times of rapid acceleration / deceleration after the end of traveling.

  In the above embodiment, the current position mark is displayed in a color corresponding to the determination result of sudden acceleration / deceleration. However, the present invention is not limited to this. For example, a mark according to the determination result is displayed. Alternatively, the blinking interval may be changed according to the determination result.

  In the above embodiment, the acceleration is calculated based on the current position measured by the GPS receiver 12, but the calculation of the acceleration is not limited to this. For example, an acceleration sensor is provided and the acceleration sensor detects the acceleration. Acceleration may be used. By providing an acceleration sensor or the like, the display form of the current location mark is changed according to sudden acceleration / deceleration in the above embodiment, but a sudden handle or the like is also detected, and the display form may be changed even in the case of a sudden handle. Good.

  As described above in detail, according to the navigation device of the present invention, the acceleration of the vehicle is compared with a predetermined threshold value to detect sudden acceleration or sudden deceleration, and the display form of the current position mark according to the result By changing, the user can perform energy saving operation without providing a special display area.

It is a block diagram which shows the structure of the navigation apparatus concerning the Example of this invention. It is a flowchart which shows the operation | movement procedure of the navigation apparatus concerning the Example of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Navigation device 11 ... Control part 111 ... Acceleration determination part 112 ... Route search part 12 ... GPS receiving part 13 ... Map storage part 14 ... Display Unit 16... Input unit 17... Path storage unit 18... Rapid acceleration / deceleration information recording unit 19.

Claims (2)

A current position detecting means for receiving a radio wave from a GPS satellite and detecting a current position every predetermined time; a map storage means for storing map information; and reading map information corresponding to the current position from the map storage means; In a navigation device comprising a control means for displaying on a display means together with a current position mark indicating
The navigation device is further based on an output of a traveling state detection unit that detects a traveling state of the vehicle on which the navigation device is mounted by calculating an acceleration based on the current position detected by the current position detecting unit. Driving status determination means for determining whether or not appropriate driving is performed,
Storage means for storing the current position detected by the current position detection means and the determination result detected by the running state detection unit;
The control means changes the display form of the current position mark based on the determination of the driving situation determination means, and further, when the display instruction of the current position and the determination result stored in the storage means is made, the storage means The current position and the determination result stored in the display unit are read out, and the current position mark is displayed on the map information stored in the map storage unit corresponding to the current position in a display form based on the determination result stored in the storage unit. A navigation device characterized by displaying on said display means. 2. The display unit according to claim 1, wherein when the display instruction for the current position and the determination result stored in the storage unit is given, the control unit reads the current position and the determination result in the order stored in the storage unit. Navigation device.

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