JP4239774B2 - Car navigation system - Google Patents

Description

  The present invention relates to a car navigation device capable of recording a stop-in at a predetermined type of facility.

2. Description of the Related Art Conventionally, there is a car navigation device as a device that displays a road map on a display device and provides driving guidance to a vehicle driver. In this method, map data is recorded on a recording medium such as an optical disk, and map data around the current position of the host vehicle is read from the map data and displayed on a display device.
In recent car navigation systems, facility information such as various facilities such as convenience stores, gas stations, and banks, the name of the facility, and the location of the facility on the map is recorded in the map data, and these facilities are recorded on the map. A landmark is displayed (for example, Patent Document 1).
Japanese Patent Publication No. 6-78912

There is a demand for a user of a vehicle to continuously record the fuel consumption of the vehicle and grasp the state of the vehicle. You may also want to know when you visited the gas station last time. However, these cannot be grasped unless a note is taken personally. However, taking a note is bothersome and troublesome.
The present invention has been made in view of the above circumstances. The purpose of the present invention is to automatically record the calendar day when the petrol station is stopped, and to calculate the fuel consumption when the refueling amount is input. It is an object of the present invention to provide a car navigation device capable of automatically recording and displaying as desired.

To achieve the above object, a car navigation system of the present invention, the position of the vehicle is not more when it is in a gas station or near, when the engine of the vehicle is started after being stopped, of the gas station The name and calendar date are stored in the storage means, and the user is prompted to input the fuel amount at the gas station, and when the fuel amount is input from the operation means, the fuel consumption is calculated and stored in the storage means. is allowed, since the display means in response to the desired, must be recorded on one by one notes have name.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 shows a car navigation apparatus 1 mounted on a vehicle such as an automobile. As shown in the figure, the car navigation device 1 has a control circuit 2 as a control means, a position detector 3 as a position acquisition means, a map data input device 4 as a map data acquisition means, and a display as a display means. A device 5, an operation switch group 6 as operation means, a sound output device 7, a remote control sensor 9 for detecting a signal from a remote control 8, a clock unit 10, an external memory 11 as storage means, an in-vehicle LAN control unit 12, and the like are connected. Configured.

  The control circuit 2 is configured as a microcomputer, and includes a CPU, a ROM, a RAM, and an I / O interface (all not shown). Among these, the ROM stores a program for navigation and driving support, and the RAM temporarily stores processing data at the time of program execution, map data acquired from the map data input device 4, and the like.

  The position detector 3 includes a geomagnetic sensor 13 for detecting an absolute azimuth, a gyroscope 14 for detecting a yaw angular velocity (yaw rate), a distance sensor 15 for detecting a vehicle travel distance, and a GPS satellite. The GPS receiver 16 that receives the signal is a part that calculates the current position information (longitude / latitude information) of the vehicle. In this position detector 3, each component has a detection error having a different property. Therefore, the position detector 3 performs a highly accurate position detection while interpolating the detection errors with each other. However, the current position is detected with the required detection accuracy. It is not necessary to provide all the components as long as they can be calculated. Further, the position detector 3 may be configured by combining a rotation sensor for a steering wheel, a wheel sensor for detecting rotation of each tire, and the like.

  The map data input device 4 is for reading data from a large capacity information recording medium 17 such as a CD-ROM or DVD-ROM. In this case, the map data stored in the information recording medium includes map information and facility information. The map information is information for representing roads, rivers, railways, urban areas, buildings, and the like. Facility information is the type (genre) of each facility such as convenience stores, gas stations, hospitals, banks, post offices, hotels, etc. represented on the map, the name of each facility, and the coordinates (latitude and longitude) representing the location on the map It is composed of In addition, in the facility information, in particular, when the facility is a gas station, a brand of gasoline sold by each gas station is also recorded.

  In addition, the map data includes a road-side equipment name database in which names of road-side equipment such as facilities, parks, and buildings are arranged in, for example, the order of Japanese syllabary, and specific information about each road-side equipment in the road-side equipment name database ( Road side equipment name, genre name indicating classification such as job type, road side equipment database covering location data (latitude and longitude data) of road side equipment, telephone number database showing correspondence between telephone numbers and road side equipment, etc. I have. As the information recording medium, a hard disk, a magneto-optical disk, a large capacity memory card, or the like can be used.

  The display device 5 includes, for example, a color liquid crystal display for displaying a map screen, and is installed near the driver's seat of the vehicle. The operation switch group 6 includes mechanical switches arranged around the display device 5, touch switches formed on the color liquid crystal display of the display device 5, and the like. The control circuit 2 receives operation inputs such as various data and setting items. Is provided to give to. Incidentally, the remote control sensor 9 is also provided as an operation means, like the operation switch group 6, and receives an operation input from the remote control 8 and gives it to the control circuit 2.

The audio output device 7 includes an audio synthesis circuit, an amplifier, a speaker, and the like, and can generate an arbitrary audio output according to audio information from the control circuit 2.
Here, in addition to the basic function of executing the map matching process for positioning the current position on the map, the control circuit 2 receives point data such as a destination and a waypoint through the operation switch group 6 and the remote controller 8. A route calculation function for performing a route search operation from the current position to the destination based on the point data using, for example, the Dijkstra method, and displaying a guide route according to the route search result on the map screen ( Well-known support functions such as a route guidance function for performing various guides by voice from the voice output device 7 or display on the display device 5 based on the guidance route obtained by this function. It has.

The clock unit 10 counts the current time, and thereby counts calendar days. The external memory 11 is composed of a flash memory card or the like. For example, the external memory 11 stores program software corresponding to an information recording medium of another standard, or stores or recalls specific data. Is provided.
The in-vehicle LAN control unit 12 is connected to the ignition switch device 19 and the trip meter 20 via the LAN cable 18, and the control circuit 2 detects the on / off state of the ignition switch device 19 and the travel distance of the trip meter 20. It can be done. In this case, the ignition switch device 19 can take four positions of off, accessory, on, and start by a key operation. The off position is a position where the power supply of the vehicle accessories is turned off and the steering wheel is locked, and a key (not shown) inserted into the ignition switch device 19 can be extracted at this off position.

  When the key is inserted into the key cylinder device 19 and turned from the off position to the accessory position, the steering wheel is unlocked and the accessory switch is turned on to turn on the accessories such as the audio and the car navigation device 1. When it is turned to the on position, the ignition switch is turned on and the ignition coil of the engine is turned on. When it is further turned to the start position, the starter switch is turned on to start the starter motor and start the engine. When the key is released after the engine is started, the ignition switch device 19 automatically returns to the ON position and maintains the driving state of the engine. When the key is operated to return to the accessory position from the on position, the engine stops, but the accessories remain energized, and the accessories are disconnected by returning to the off position.

  The position of such an ignition switch device 19 is detected by the control circuit 2. Therefore, the control circuit 2 functions as an engine state detecting means for detecting engine start / stop. Then, the control circuit 2 matches the position of the vehicle detected by the position detector 3 with the position of a predetermined type of facility (the latitude and longitude of the facility stored in the map data) or in the vicinity thereof (for example, the facility When the engine is stopped and restarted, the name of the facility, the date and time, etc. are stored in the external memory 11 when the engine is restarted. Yes.

Next, the storage operation at this stop will be described with reference to the flowchart of FIG. FIG. 2 shows a case where the storage target facility is a gas station. This storage target facility is configured to be selectable by operating the operation switch group 6 or the remote controller 8 which are operation means (storage facility selection means).
When the power is turned on, the control circuit 2 grasps the current position of the host vehicle from the position information from the position detector 3 and displays a road map around the current position on the display device 5 (step S1). A state is maintained in which it is determined whether or not the grasped current position matches or is close to the position of the gas station (within a radius of 20) (set type facility arrival determination means; step S2).

  When the driver stops at the gas station for refueling, the position of the host vehicle indicated by P in FIG. 3 is within the radius 20 of the position of the gas station. Then, the control circuit 2 determines “YES” in step S2, and then determines whether or not the engine is stopped, that is, whether or not the ignition switch device 19 is in the accessory position or the off position (step S3). . When the driver stops the engine for refueling, the control circuit 2 determines “YES” in step S3, and then whether or not the engine has been restarted, that is, the ignition switch device 19 is in the on position or the start position. Whether or not is monitored (step S4).

  When refueling at the gas station is completed and the engine is restarted (ignition switch is turned on), the control circuit 2 becomes “YES” in step S4, and the driver inputs the refueling amount at the gas station to the driver. Is displayed on the display device 5 (step S5), and an input of the amount of oil supply is awaited (step S6). As shown in FIG. 4, the display screen in step S <b> 4 includes a message “What is the amount of gasoline supply?” And a numeric keypad for inputting the amount of supply.

  Therefore, when the driver touches the numeric keypad display and inputs a number of gasoline refueling amount (42.5 liters in the example of FIG. 4), the touch switch operates to input the refueling amount to the control circuit 2. Then, the control circuit 2 becomes “YES” in step S6, acquires the travel distance of the trip meter 20 (travel distance acquisition means), and the travel distance at the time of the previous refueling from the current travel distance (stored in the external memory 11). ) Is subtracted to obtain the travel distance after the previous refueling, and the travel distance after the previous refueling is divided by the current refueling amount to calculate the fuel consumption (step S8; fuel consumption calculation means).

  Next, the control circuit 2 reads the calendar date and the current time of the day from the clock unit 10 and also reads the coordinates, address, name, and brand of the gasoline being handled from the map data, The current trip meter travel distance is stored in the external memory 11 (step S10), and the process returns to step S1. The data stored in the external memory 11 is displayed as a table of the refueling history as shown in FIG. 5 under the control of the control means 2 functioning as the display control means by operating the operation switch group 6 or the remote controller 8. In addition, as shown in FIG. 6, a change in fuel consumption can be displayed as a graph on the display device 5. Software for making this table or graph is stored in a storage means such as a ROM of the control circuit 2.

  In FIG. 5, A, B, and C indicate the names of the gas stations, and G1 to G3 indicate the brands of the gasoline handled at each gas station. When the part of the map is touched, the position of the gas station is displayed. It is displayed on the map of the device 5. The refueling data can be displayed side by side in order of date, or can be displayed by prefecture where the gas station is located.

  As described above, according to the present embodiment, when the user wants to grasp the state of the host vehicle by the fuel consumption, the name of the gas station, the date and time of fuel supply, the fuel consumption, etc. are automatically entered simply by inputting the amount of fuel supply. Stored in the external memory 11. Since the date and time of refueling, the name of the fueling station, the amount of fueling, the fuel consumption, and the like can be displayed on the display device 5 as desired, it is convenient and free from the trouble of taking notes one by one.

The present invention is not limited to the embodiments described above and shown in the drawings, and can be expanded or changed as follows.
The stopover stored in the external memory 11 is not limited to a gas station, and may be a car dealer. The stored contents in this case are the date and time (calendar date) and date of visit, the dealer name, the address, the position (coordinates), and the like.

  The travel distance of the vehicle may be acquired from the distance sensor 15.

1 is a block diagram of an electrical configuration showing an embodiment of the present invention. Flow chart of refueling information recording Front view of display screen showing map Fig. 3 equivalent diagram showing the numeric keypad for oil supply input The figure which shows the refueling information displayed on the display screen Figure 3 equivalent diagram showing the transition graph of fuel consumption

Explanation of symbols

In the drawings, 1 is a car navigation device, 2 is a control circuit (control means, engine state detection means), 3 is a position detector (position acquisition means), 4 is a map data input device (map data acquisition means), and 5 is a display. A device (display means), 6 is an operation switch group (operation means), 8 is a remote control (operation means), 10 is a clock unit, 11 is an external memory (storage means), and 19 is an ignition switch device.

Claims (1)

Position acquisition means for acquiring the current position of the host vehicle;
Map data acquisition means for acquiring map data having map information and facility information including the type and name of each facility represented on the map and a position on the map corresponding to the name;
Display means for displaying a map based on the map data;
Engine state detecting means for detecting start / stop of the engine of the host vehicle;
Operation means;
Storage means;
Calendar date counting means for counting calendar days;
Control means,
The control means includes
When the current position of the host vehicle by the position detection means is at or near the gas station of each facility, and when the engine state detection means detects that the engine has started after being stopped, The name and calendar date of the gas station are read from the map data and the calendar date counting means, stored in the storage means, and the user is prompted to input the amount of fueling at the gas station, and the operation When the fueling amount is input from the means, the fuel consumption is calculated and stored in the storage means, and the data stored in the storage means is displayed on the display means by a predetermined operation of the operation means ;
A car navigation device characterized by the above .

Images