JP2000180202A - Running distance detecting device and map disk - Google Patents

Abstract

PROBLEM TO BE SOLVED: To accurately execute position measurement by a self-sustaining system by providing a constant setting means setting a vehicle constant according to the type of vehicle selected by a vehicle type electing means. SOLUTION: A navigator microcomputer 5 computes the automobile position by a self-sustaining system, based on the detected signal of a gyro-sensor 2 and the vehicle speed pulse signal from a vehicle speed pulse input part 3, and further the computed automobile position and the position signal from a GPS sensor 1 are complementarily processed to decide the automobile position. The navigatior microcomouter 5 controls a CD-ROM player 4 according to the decided automobile position and the operating condition in an operation switch 6, reads out necessary map data from the CD-ROM, computes the route up to the destination, and let a display 7 constituted of a liquid crystal display device or the like to display a corresponding map, route, various guides, operation guide, and the like.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a travel distance detecting device for detecting a travel distance required for a navigation system or the like (including a speed or an acceleration having a differential relationship with the travel distance), and map information used for a navigation system or the like. Is related to the map disk in which is stored.

[0002]

2. Description of the Related Art A map, such as a liquid crystal display, is displayed on a display.
2. Description of the Related Art Navigation systems for displaying a route to a destination, a position of a vehicle, and the like have been widely used. One of the important functions of the navigation system is to detect the position of the own vehicle, and two kinds of methods are mainly used for detecting the position of the own vehicle. One is a GPS system that receives a signal from a positioning artificial satellite called a GPS satellite and calculates a position from the signal. The other is a direction detected by a direction sensor formed of a gyro or the like installed in the vehicle, and a vehicle speed pulse signal generated in synchronization with the rotation of the wheel (a pulse signal having a cycle corresponding to the vehicle speed, and is provided for each predetermined traveling distance). This is a self-sustained system in which the travel distance in each direction is obtained from the distance obtained from the above equation (1), and the positions are detected by successively integrating the travel distances.

Each of these methods has advantages and disadvantages, and is often used together so as to complement each other in order to enhance the position detection accuracy. For example, the GPS system has a disadvantage that positioning cannot be performed in tunnels or valleys of high-rise buildings where signals from GPS satellites cannot be received, and the self-sustained system has a disadvantage that measurement errors are accumulated. In order to compensate for the drawback, for example, measures are usually taken such that positioning is usually performed in a self-contained manner, and occasionally, positioning results obtained in a self-supported manner are corrected by positioning using a GPS method.

[0004]

In the autonomous system, a distance is calculated from a vehicle speed pulse signal. This vehicle speed pulse signal
Generally, a signal from a vehicle speed sensor that outputs a vehicle speed pulse signal used for controlling a drive system of a vehicle is used instead of a sensor dedicated to a navigation system, but a pulse period of the vehicle speed pulse signal for this vehicle speed is, in other words, one pulse. The corresponding mileage differs depending on the vehicle type and year. That is, the number of pulses to be measured and 1 for the corresponding vehicle type
The product of the travel distance per pulse (hereinafter referred to as vehicle constant) is the travel distance.

Therefore, when the navigation system is mounted on a vehicle, it is necessary to set vehicle constants, and there is a problem that the operation is troublesome, such as checking the set value of the vehicle on which the navigation system is mounted. Further, a method of estimating and setting a set value from the positioning result by the GPS method and the input result of the vehicle speed pulse signal may be considered, but it is necessary to travel a certain distance until the estimated value is stabilized to an appropriate value. There is a problem that proper positioning cannot be performed immediately after mounting.

The present invention has been made in view of these problems, and makes it easy to set the vehicle constants to simplify the work of mounting the navigation system, and to perform appropriate positioning immediately after mounting. It is an object to provide a mileage detecting device and a map disk.

[0007]

Means for Solving the Problems and Their Effects To solve the above problems, a traveling distance detecting device (1) according to the present invention is provided.
Captures a pulse signal that is output from a drive system of the vehicle and generates a pulse for each predetermined traveling distance, and calculates the traveling distance by performing an arithmetic processing on the number of pulses of the pulse signal using a vehicle constant corresponding to the vehicle. The mileage detecting device is characterized by comprising a vehicle type selecting means for selecting a type of the vehicle, and constant setting means for setting the vehicle constant according to the vehicle type selected by the vehicle type selecting means. .
According to the traveling distance detection device (1), an appropriate vehicle constant is set by a simple operation of selecting a vehicle type,
Positioning by the self-supporting method is performed with high accuracy.

Further, in the traveling distance detecting device (2) according to the present invention, in the traveling distance detecting device (1), the constant setting means can store a vehicle constant corresponding to a vehicle type and can update the stored contents. Storage means, and constant selection means for selecting a vehicle constant to be set from the vehicle constants stored in the storage means in accordance with the vehicle type selected by the vehicle type selection means. According to the traveling distance detection device (2), the vehicle constant stored in the storage means can be updated, so that an appropriate vehicle constant can be easily set for a new vehicle type.

Further, according to the traveling distance detecting device (3) of the present invention, in the traveling distance detecting device (2), the constant setting means may be adapted to a vehicle type transmitted from a vehicle information providing system for providing the vehicle constant. Updating means for receiving the information of the corresponding vehicle constant and updating the storage content of the storage means is provided. According to the mileage detecting device (3), the vehicle constant stored in the storage means can be updated by data communication. Therefore, only the data maintenance of the vehicle information providing system can be used to set an appropriate vehicle constant to a new vehicle type. It can be easily set.

Further, in the traveling distance detecting device (4) according to the present invention, in the traveling distance detecting device (1), the constant setting means may convert the vehicle type information selected by the vehicle type selecting means into the vehicle constant. Transmitting means for transmitting to the vehicle information providing system to be provided; and receiving means for receiving the vehicle constant transmitted from the vehicle information providing system and setting the received vehicle constant as a vehicle constant to be set. It is characterized by. According to the traveling distance detection device (4), the vehicle constant can be set by data communication, so that the appropriate vehicle constant can be easily set to a new vehicle type only by data maintenance of the vehicle information providing system. Becomes

Further, in the traveling distance detecting device (5) according to the present invention, in the traveling distance detecting device (1) or (4), the vehicle type selecting means displays vehicle type selecting information for selecting a vehicle type. Display means, and information selection means for selecting corresponding information from the vehicle type selection information displayed on the display means, when the vehicle type is specified by the vehicle type selection information selected by the information selection means, A vehicle type determining unit that determines the vehicle type as a vehicle type to be selected and, if the vehicle type is not specified, narrows and changes the vehicle type selection information to specify the vehicle type in accordance with the selected vehicle type selection information. It is characterized by having. According to the traveling distance detection device (5), if the corresponding information is sequentially selected from the vehicle type selection information displayed on the display means, the vehicle type is specified and an appropriate vehicle constant is set.
The setting operation of the vehicle constant becomes easy.

Further, in the traveling distance detecting device (6) according to the present invention, in the traveling distance detecting device (5), the selected vehicle type selection information is transmitted to a vehicle information providing system for providing the vehicle constant. It is characterized by comprising a vehicle type selecting information transmitting means, and a vehicle type selecting information receiving means for receiving the vehicle type selecting information transmitted from the vehicle information providing system. The traveling distance detection device (6)
According to this method, the vehicle constant can be set by data communication, so that only the data maintenance of the vehicle information providing system can easily set an appropriate vehicle constant to a new vehicle type.

Further, a map disk (1) according to the present invention.
In a map disk in which map information is stored, a pulse signal that is output from a drive system of the vehicle and generates a pulse for each predetermined traveling distance is captured, and the number of pulses of the pulse signal is determined using a vehicle constant corresponding to the vehicle. A vehicle type information indicating a type of a vehicle and the vehicle constant are stored in association with each other with respect to a travel distance detection device that calculates a travel distance by performing arithmetic processing. According to the map disk (1), the vehicle constants can be set by reading the vehicle information from the map disk, so that the vehicle constants can be easily set using a disk reproducing device in a navigation system or the like. In addition, updating the map disk is easier and easier than updating (exchanging / modifying) the navigation system, etc. In addition, when updating the map data regularly, the updating of the vehicle constant is also performed at the same time. In addition, it is possible to easily set an appropriate vehicle constant for a new vehicle model, relatively quickly, and at low cost.

[0014]

Embodiments of the present invention will be described below. FIG. 1 is a block diagram showing a navigation system according to an embodiment of the present invention.

The GPS sensor 1 receives a signal from a GPS satellite, calculates a vehicle position based on the signal, and outputs it to a navigation system control microcomputer 5 (hereinafter referred to as a navigation microcomputer). The gyro sensor 2 is a sensor that detects a change in the direction of the vehicle and includes a gyro, and outputs a detection signal to the navigation microcomputer 5. In the navigation microcomputer 5, the gyro sensor 2
To calculate the direction of the vehicle. In the vehicle speed pulse input unit 3, a pulse emitted from a vehicle speed sensor (not shown) installed on the vehicle side at every predetermined traveling distance is provided.
(The number of pulses in a predetermined period is proportional to the vehicle speed.) A vehicle speed pulse signal is input to the navigation microcomputer 5 after performing noise removal and waveform shaping processing.

The vehicle speed sensor installed on the vehicle is normally used for controlling the drive system of the vehicle, for example, for controlling fuel injection and ignition timing, and is already provided in the vehicle. As the vehicle speed sensor, for example, a magnetic sensor including a magnet that rotates in synchronization with the axle, and a reed switch that changes the connection / disconnection state according to the state of the magnetic field that changes according to the rotational position of the magnet, and in synchronization with the axle There is an optical sensor and the like including a rotating shield plate, a light receiving element and a light emitting element whose blocking state of the optical path changes depending on the rotation position of the shield plate.

The CD-ROM player 4 reads necessary data from a CD-ROM in which map data is stored according to a control signal from the navigation microcomputer 5, and outputs the data to the navigation microcomputer 5. The CD-ROM set in the ROM player 4 can be exchanged, and the map can be updated (the map CD-ROM is upgraded). The operation switch 6 is a switch for operating the navigation system, and is configured by a push button switch installed on the navigation system main body, an infrared remote controller, and the like, and includes an ON-OFF switch, a direction specifying switch such as a joystick, and the like. ing.

The navigation microcomputer 5 calculates an own vehicle position in an independent manner based on the detection signal of the gyro sensor 2 and a vehicle speed pulse signal from the vehicle speed pulse input unit 3, and further calculates the own vehicle position and the GPS sensor 1 The position of the own vehicle is determined by complementing the position signal from the vehicle. Further, the navigation microcomputer 5 reads the necessary map data from the CD-ROM by controlling the CD-ROM player 4 in accordance with the determined vehicle position and the operation state of the operation switch 6, and provides the navigation device with the destination. A process for calculating a route and the like are performed, and a display such as a liquid crystal display device displays a corresponding map, a route, various kinds of guidance, an operation guidance display, and the like. The navigation microcomputer 5 has a built-in RAM and a ROM (not shown) for storing various data and programs, and for processing.

Next, the circuit configuration of the vehicle speed pulse input section 3 will be described. FIG. 2 is a circuit diagram showing a circuit configuration of the vehicle speed pulse input unit 3. Vehicle speed pulses from a vehicle speed sensor installed on the vehicle side are connected to coils L1 and L2 connected in series.
The noise is removed by a low-pass filter including a capacitor C1 having one end connected between the coils L1 and L2 and the other end grounded. Then, the signal from which the noise has been removed is a diode D1, resistors R1 and R1.
2 is biased at an appropriate voltage by a bias circuit constituted by 2 and smoothed by a capacitor C2. Then, the smoothed signal is compared with the reference voltage obtained by dividing the power supply voltage Vcc by the resistors R3 and R4 by the comparator CMP, and is output to the navigation microcomputer 5. That is, the vehicle speed pulse input unit 3 removes noise from the vehicle speed pulse from the vehicle speed sensor installed on the vehicle side by each filter, and the comparator CMP
, And output to the navigation microcomputer 5.

Next, the operation of the navigation system according to the present embodiment (operation for setting vehicle constants) will be described. FIG. 3 is a state transition diagram showing an operation (display) state of the navigation system.

During the operation of the navigation system, the operation of the switch SW1 and the operation of the ON / OFF switch of the remote controller, the operation of the direction specifying switch such as the joystick, etc. Change), and the selection of the one designated by the ON-OFF switch is determined (hereinafter, such switch and remote controller operations are referred to as selection operations). When the menu function is selected, the screen 20 of the display 7 is displayed.
Then, a menu list is displayed (FIG. 3A).

Next, when a vehicle speed pulse setting is selected from a menu list by a selection operation, the navigation microcomputer 5
A search is made from the data stored in M, and a vehicle manufacturer list is displayed (FIG. 3B).

Next, when a certain maker is selected from the maker list by a selection operation, the navigation microcomputer 5 searches from the data stored in the ROM, and displays a list of vehicle models and year models of the maker (FIG. 3 ( C)).

Next, when a certain vehicle type / year type is selected from the vehicle type / year type list by a selection operation, the navigation microcomputer 5
Searching from the data stored in the OM, a list of the grade (displacement, presence / absence of a supercharger, name added to the model, etc.) of the vehicle in the model and year is displayed (FIG. 3 (D) )).

When a certain grade is selected by the selecting operation, the navigation microcomputer 5 retrieves the vehicle constant corresponding to the grade from the data stored in the ROM, and selects the vehicle constant to be used in the navigation system.

The ROM of the navigation microcomputer 5 is EEPRO
If it is configured with a rewritable ROM such as M, it can be updated to new data by a method such as communication, and even if a new model comes out, the vehicle constant can be updated without much modification. Can be set. In addition, map CD
-If the above-mentioned vehicle constants are stored in the ROM and these data are retrieved from the data stored in the map CD-ROM using the map CD-ROM player 4, a new vehicle type can be obtained. Even if it comes, map CD-ROM
It is possible to set the vehicle constant without changing the new vehicle type by simply replacing the vehicle with a new one. Map C
The D-ROM is normally updated in response to changes in roads, for example, at intervals of one year. If the vehicle constant data is also updated at the time of the update, the cost can be kept low and smooth updating is possible. Becomes

Next, a process performed by the navigation microcomputer 5 to realize the above-described operation will be described. FIG.
5 is a flowchart showing a process performed by the navigation microcomputer 5. This process is repeatedly performed together with other processes while the navigation system is operating.

First, in step S1, it is determined whether or not a setting operation of a vehicle constant has been performed. If it is determined that a setting operation has been performed, the process proceeds to step S2. If it is determined that there has been no setting operation, the present process is terminated. In step S2, a vehicle manufacturer list is displayed, and the process proceeds to step S3. In step S3, it is determined whether or not the maker selection operation using the maker list has been completed. If it is determined that the selection has been completed, the process proceeds to step S4. If it is determined that the selection has not been completed, the process returns to step S3. .

In step S4, a vehicle type / year list corresponding to the selected maker is displayed, and the flow advances to step S5. In step S5, it is determined whether or not the vehicle type / year selection operation using the vehicle type / year list has been completed. If it is determined that the selection has been completed, the process proceeds to step S6, where it is determined that the selection has not been completed. Then, the process returns to step S5.

In step S6, a grade list corresponding to the selected vehicle type / year is displayed, and the flow advances to step S7. In step S7, it is determined whether or not the grade selection operation using the grade list has been completed. If it is determined that the selection has been completed, the process proceeds to step S8. If it is determined that the selection has not been completed, the process returns to step S7. .

In step S8, a vehicle constant (running distance data for one pulse) corresponding to the selected vehicle type / year and grade is searched, and the process proceeds to step S9. In step S9, the retrieved vehicle constants are set as vehicle constants used in the navigation system, and the process ends.

Next, a second embodiment of the present invention will be described. FIG. 5 is a block diagram showing a configuration of the navigation system according to the second embodiment of the present invention. still,
The same components as those of the navigation system according to the first embodiment shown in FIGS. 1 to 4 are denoted by the same reference numerals, and description thereof is omitted.

The in-vehicle information terminal 8 requests the information center 14 to provide various types of information, and responds to the request by displaying various types of information provided from the information center 14 on the display 7. In response to an information request from the navigation microcomputer 5, necessary information is obtained from the information center 14, and an operation of providing information to the navigation microcomputer 5 is performed. The in-vehicle information terminal 8 is connected to a connector 9 for connection to a mobile (wireless) telephone 10. By connecting the mobile telephone 10 to the connector 9, the information terminal 14 can be connected to the information center 14 via a telephone line. Has become.

The information center 14 receives a request for providing various types of information from the on-board information terminal 8 and provides information corresponding to the request to the on-board information terminal 8, and includes a magnetic tape, a magnetic disk device, and the like. And the information station control device 12 that performs a process of transmitting and receiving information configured by a computer, a process of searching for necessary data from the database 13, and the like. I have. The information center 14 is connected to the wireless telephone station 11 by a telephone line (wired line), and can communicate with the in-vehicle information terminal 8 by a telephone line (wired and wireless lines). The vehicle constant is stored in the database 13 in association with the data of the maker, the vehicle type, the year, and the grade, and the vehicle constant can be searched from the data of these vehicle types.

In the navigation system according to the second embodiment, the operation shown in FIG. 3 is performed similarly to the navigation system according to the first embodiment.
Next, processing performed by the navigation microcomputer 5 and the information station control device 12 in order to realize the above-described operation will be described. FIG. 6 is a flowchart showing the processing performed by the navigation microcomputer 5 and the information station control device 12. Each of these processes is repeatedly performed together with other processes while the navigation system is operating and the information center 14 is operating.

First, the processing performed by the navigation microcomputer 5 will be described. In step P1, it is determined whether or not a setting operation of the vehicle constant has been performed. If it is determined that the setting operation has been performed, the process proceeds to step P2. In step P2, a maker list is displayed, and the process proceeds to step P3 after a maker selection operation. In this example, data necessary for displaying the maker list is stored in the ROM in the navigation microcomputer 5. In Step P3, the data request of the vehicle constant is transmitted to the information center 14 together with the data of the selected manufacturer, and the routine goes to Step P4. In Step P4, it is determined whether or not the reception of the vehicle type and year data corresponding to the manufacturer transmitted from the information center 14 has been completed. If it is determined that the reception has been completed, the process proceeds to Step P5, and the reception has been completed. If not, the process returns to Step P4.

In step P5, the received vehicle type and year data are displayed, and the process proceeds to step P6 after selecting the vehicle type and year. In Step P6, the data of the selected vehicle type and year is transmitted to the information center 14, and Step P7
Move on to In Step P7, it is determined whether or not the reception of the grade data transmitted from the information center 14 has been completed. If it is determined that the reception has been completed, the process proceeds to Step P8. If it is determined that the reception has not been completed, The procedure returns to Step P7.

At Step P8, the received grade data is displayed, and after waiting for a grade selection operation, Step P9 is performed.
Move on to In Step P9, the data of the selected grade is transmitted to the information center 14, and the routine goes to Step P10. In Step P10, it is determined whether the reception of the vehicle constant data transmitted from the information center 14 has been completed,
If it is determined that the reception has been completed, the process proceeds to Step P11. If it is determined that the reception has not been completed, the process proceeds to Step P10.
Return to

In step P11, the received vehicle constant is set as a vehicle constant used in the navigation system, and the process ends.

Next, the processing performed by the information station controller 12 will be described. In step Q1, it is determined whether or not a data request for a vehicle constant from the in-vehicle information terminal 8 has been received. If it is determined that the request has been received, the process proceeds to step Q2. If it is determined that the request has not been received, the present process ends. . In step Q2, a database 13 is created based on the received maker data.
, And the corresponding vehicle type and year data are searched, and the routine goes to Step Q3. In step Q3, the searched vehicle type and year data are transmitted to the in-vehicle information terminal 8, and the process proceeds to step Q4.

In step Q4, it is determined whether or not the vehicle type and year data selected from the on-board information terminal 8 have been received.
If it is determined that it has been received, the process proceeds to step Q5, and if it is determined that it has not been received, the process returns to step Q4. Step Q
At 5, the database 13 is searched based on the received vehicle type and year data, and the corresponding grade is searched, and the process proceeds to step Q6. In step Q6, the searched grade is transmitted to the on-vehicle information terminal 8, and the process proceeds to step Q7.

At step Q7, it is determined whether or not the grade data selected from the onboard information terminal 8 has been received. If it is determined that it has been received, the process proceeds to step Q8. If it is determined that it has not been received, the process proceeds to step Q7. Return to Step Q8
Then, the database 13 is searched based on the received grade data, a corresponding vehicle constant is searched, and the process proceeds to step Q9. In step Q9, the searched vehicle constant is
The information is transmitted to the in-vehicle information terminal 8, and the process ends.

The above-mentioned onboard information terminal 8 and information center 1
By repetition of the communication with the vehicle 4, the corresponding vehicle constants are sequentially narrowed down, and finally the corresponding vehicle constants are set in the navigation system.

In the navigation system according to the second embodiment, the maker, vehicle type, year, and grade data selected from the in-vehicle information terminal 8 are sequentially transmitted to the information center 14, and the information center 14 sequentially transmits the data. The database 13 is sequentially searched based on the received maker, vehicle type, year, and grade data, and finally the information center 1 is searched.
4, the vehicle constant searched is transmitted to the in-vehicle information terminal 8, but in another embodiment, the maker, vehicle type, year, and grade data are set on the in-vehicle information terminal 8 side. The terminal 8 transmits these data to the information center 14 at one time, and the information center 14 searches the database 13 at a time based on all the received data of the manufacturer, vehicle type, year, and grade data. It is also possible to transmit the obtained vehicle constant to the in-vehicle information terminal 8. In this case, it is necessary for the navigation system of the vehicle to have data for setting the manufacturer, vehicle type, year, and grade data.

Also, when the operation of setting the vehicle constant is performed, the vehicle information terminal transmits the vehicle constant setting operation information to the information center, and the information center receives the vehicle constant setting operation information from the vehicle information terminal. Manufacturer data or all data (manufacturer, model, year, grade) on the in-vehicle information terminal
May be transmitted.

[Brief description of the drawings]

FIG. 1 is a block diagram schematically showing a navigation system according to an embodiment of the present invention.

FIG. 2 is a circuit diagram showing a circuit configuration of a vehicle speed pulse input unit.

FIG. 3 is a state transition diagram showing an operation (display) state of the navigation system.

FIG. 4 is a flowchart showing a process performed by a navigation microcomputer.

FIG. 5 is a block diagram schematically showing a navigation system according to a second embodiment of the present invention.

FIG. 6 is a flowchart showing processing performed by the navigation microcomputer and the information station control device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... GPS sensor 2 ... Gyro sensor 3 ... Vehicle speed pulse input part 5 ... Navigation microcomputer 6 ... Operation switch 7 ... Display 8 ... In-vehicle information terminal 12 ... Information station control Equipment 14. Information Center

Claims (7)

[Claims] 1. A pulse signal which is output from a drive system of a vehicle and generates a pulse for each predetermined traveling distance is taken in, and the number of pulses of the pulse signal is arithmetically processed using a vehicle constant corresponding to the vehicle, thereby obtaining a traveling distance. A vehicle type selecting means for selecting a type of the vehicle, and constant setting means for setting the vehicle constant according to the vehicle type selected by the vehicle type selecting means. Characteristic travel distance detection device. 2. The constant setting means stores a vehicle constant corresponding to a vehicle type and a storage means capable of updating stored contents, and is stored in the storage means in accordance with the vehicle type selected by the vehicle type selecting means. 2. The travel distance detecting device according to claim 1, further comprising: constant selecting means for selecting a vehicle constant to be set from the vehicle constant. 3. The constant setting unit includes an updating unit that receives information of a vehicle constant corresponding to a vehicle type transmitted from a vehicle information providing system that provides the vehicle constant, and updates storage contents of the storage unit. 3. The travel distance detecting device according to claim 2, wherein: 4. A transmitting means for transmitting the vehicle type information selected by the vehicle type selecting means to a vehicle information providing system for providing the vehicle constant, wherein the constant setting means transmits the vehicle type information selected by the vehicle type selecting means, 2. A receiving means for receiving a vehicle constant and setting the received vehicle constant as a vehicle constant to be set.
The traveling distance detecting device according to the above. 5. A display means for displaying vehicle type selection information for selecting a vehicle type, wherein the vehicle type selection means displays information for selecting a vehicle type, and information selection for selecting corresponding information from the vehicle type selection information displayed on the display means. Means, when a vehicle type is specified by the vehicle type selection information selected by the information selection means, the vehicle type is determined as a vehicle type to be selected, and when the vehicle type is not specified, the vehicle type is determined according to the selected vehicle type selection information. The travel distance detecting device according to claim 1 or 4, further comprising a vehicle type determining means for narrowing and changing the vehicle type selection information to specify the vehicle type. 6. A vehicle type selecting information transmitting means for transmitting the selected vehicle type selecting information to a vehicle information providing system for providing the vehicle constant, and receiving the vehicle type selecting information transmitted from the vehicle information providing system. The traveling distance detecting device according to claim 5, further comprising: a vehicle type selecting information receiving unit that performs the vehicle type selecting. 7. A map disk in which map information is stored, wherein a pulse signal output from a drive system of the vehicle and generating a pulse for each predetermined traveling distance is taken in, and the number of pulses of the pulse signal is determined according to the vehicle. A map disk, which stores vehicle type information indicating a type of a vehicle and the vehicle constant in relation to a mileage detecting device that calculates a mileage by performing arithmetic processing using a constant.