JPH04131782A - Route guide device for car - Google Patents

Abstract

PURPOSE:To provide a route guide device at a low cost, which is capable of being mounted on a car body after completion, by storing in a memory the data of position measurements obtained by the use of an artificial satellite dedicated therefore at certain time intervals, reading on the way home one piece by one, subjecting to computing process, and displaying the obtained current position, distance, and azimuth. CONSTITUTION:When running to the final destination, the measuring data of the position of the car proper is accommodated in a memory means 6 at certain time intervals through the use of a position measuring artificial satellite 7. On the way home, these pieces of stored data are read, and a calculating means 3 compares the position measuring data of the current position with the data of position next coming, and the distance and azimuth to the current position are displayed in a display means 4. Therefore, labors such as entering specific road data while looking at a map are skipped on the way home, and also a means to make map display may be omitted, and a cheap road guide device is achieved which can offer a driver information of advancing direction and distance necessary for driving the car.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a device for detecting the current position of a vehicle, for example, to a route guide device for a vehicle that detects and displays the current position of a moving vehicle. It is something.

[Prior art] As this type of route guide device for automobiles,
Techniques disclosed in Japanese Patent Publication No. 97707, Japanese Patent Publication No. 59-196413, Japanese Patent Publication No. 60-7461, etc. can be mentioned.

The technique disclosed in Japanese Patent Publication No. 58-97707 sequentially stores the bearing and travel distance according to the direction of travel of the vehicle, and displays the direction of travel of the vehicle based on the stored information on the return trip.

Furthermore, the technique disclosed in Japanese Patent Publication No. 59-196413 is for erasing outgoing travel miracles displayed on a map on a display during the return journey.

The technology published in Special Publication No. 60-7461 is
The amount of change in the direction of travel is detected based on the rotation angle of the handle, and the data of the changed points is sequentially recorded, and on the return trip, it is read out in reverse and the next direction of travel is displayed.

[Problems to be Solved by the Invention] However, the technology published in Japanese Patent Publication No. 58-97707 uses the earth's magnetism to determine the direction in which the vehicle is traveling, and also uses pulse signals from the drive system to detect the traveling distance. Because it requires a certain amount of certification, installation is limited to certain vehicle models, and it cannot be made universal. In addition, special public service 59-1964
Since the technology disclosed in Publication No. 13 displays a map on a display, the display and recording means are expensive. The technique disclosed in Japanese Patent Publication No. 60-7461 requires a sensor to detect the rotation angle of the steering wheel, and like the former, installation is limited to certain vehicle types and cannot be made universal.

In other words, conventional route guide devices for automobiles require a dedicated sensor installed on the vehicle side and a display and recording means for manually outputting expensive map data. The device is expensive, and retrofitting is difficult.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide an inexpensive route guide device for automobiles that can be retrofitted to the vehicle body and that informs the driver of the traveling direction and distance information necessary for operation. .

[Means for solving the problem] The automobile route guide device according to the invention of claim 1 includes:
The position of the own vehicle is determined by the positioning detection means using a positioning satellite at predetermined time intervals, and the positioning data is stored in the storage means.On the return trip, the positioning data stored in the storage means are stored in the order in which they are stored. The positioning data of the current positioning position is compared with the positioning data of the next positioning position, and the distance to the current positioning position and the direction from the current positioning position are calculated. The calculated distance to the current measured position and the direction from the current measured position are displayed on the display means.

The automobile route guide device according to the invention of claim 2 includes:
The positioning data is sequentially stored in the storage means at predetermined distance intervals.

The automobile route guide device according to the invention of claim 3 includes:
The calculation means and the display means configured in claim 1 or claim 2 are further added with a distance display between the current position and the final destination obtained from the positioning data of the current position and the final destination. It is.

The automobile route guide device according to the invention of claim 4 includes:
The storage means configured to sequentially store positioning data according to claims 1, 2, and 3 thins out the positioning data on the starting point side and transfers the positioning data to the final destination side when its storage capacity is filled. It is for storing.

The automobile route guide device according to the invention of claim 5 includes:
By operating the current position registration switch, positioning data with the current vehicle position as the positioning point is stored in the storage means.

[Function] In the first aspect of the invention, on the outbound trip, the positioning detection means measures the position of the vehicle using a positioning artificial satellite, and stores the positioning data in the storage means at predetermined time intervals. On the return trip, the calculation means sequentially reads the positioning data stored in the storage means in the reverse order of storage, compares the positioning data of the current positioning position with the positioning data of the next positioning position, and calculates the current positioning data. The distance to the measured position and the direction from the current measured position are calculated, and the calculated distance to the current measured position and the direction from the current measured position are displayed on the display means.

In the second aspect of the invention, on the outbound trip, the positioning detection means measures the position of the own vehicle using a positioning artificial satellite, and stores the positioning data in the storage means at predetermined distance intervals. On the return trip, the calculation means sequentially reads the positioning data stored in the storage means in the reverse order of storage, compares the positioning data of the current positioning position with the positioning data of the next positioning position, and calculates the current positioning data. The distance to the measured position and the direction from the current measured position are calculated, and the calculated distance to the current measured position and the direction from the current measured position are displayed on the display means.

In the invention of claim 3, the calculation means and the display means additionally display a distance between the current position and the final destination obtained from positioning data of the current position and the final destination. .

In the invention of claim 4, when the storage capacity of the storage means for sequentially storing positioning data is filled, the positioning data on the starting point side is thinned out and the positioning data is stored on the final destination side. The system secures a data storage area and also thins out the positioning data to obtain guidance information that is highly needed by drivers.

In the invention of claim 5, by operating the current position registration switch, positioning data with the current position of the vehicle as the positioning point is stored in the storage means, regardless of the predetermined distance interval or time interval. Positioning data with the current position of the vehicle as the positioning point can be stored in the storage means, and the driver can specify the necessary location on the return trip based on his/her judgment.

[Embodiment] FIG. 1 is a block diagram of an automobile navigation device according to an embodiment of the present invention, and FIG. 2 is a front view of an operation display panel 10 of an automobile navigation device according to an embodiment of the present invention. It is something.

In Figure 1, GPS (hereinafter simply rGPs (Gl
positioning system)
The receiver 2 (denoted as J) is a known receiver that measures its own position using radio waves from three or more positioning satellites 7. The inside of the GPS receiver 2 is composed of a receiving section, a received signal processing section that generates separated signals for demodulating orbit data and measuring distance, and calculates the latitude and longitude of itself from these signals and outputs the output. .

Radio signals are input to the GPS receiver 2 from a GPS antenna 1 that receives radio waves from a plurality of positioning satellites 7 . The output of the GPS receiver 2 is manually inputted to a calculation means 3 consisting of a microcomputer. Note that the automobile route guide device of this embodiment has a GPS antenna 1.
, the GPS receiver 2 constitutes a positioning detection means that measures the position of the own vehicle using the positioning artificial satellite 7.

Further, a RAM serving as a storage means 6 for storing the position of the intersection and the traveling direction of the intersection is connected to the calculation means 3. The calculation means 3 has a built-in timer, and the positioning data calculated by the calculation means 3 is stored in the RAM as the storage means 6 at predetermined time intervals.

The calculation means 3 includes a distance display section 4A that displays the calculated distance to the current position, a vehicle traveling direction display section 4B and a guide direction display section 4C that display the direction from the current position. It is connected to display means 4. Furthermore, the calculation means 3 includes an outbound route switch 11 that stores the outbound route at predetermined time intervals in order to guide the return route, a current position registration switch 12 that registers the current positioning position, and a forward route switch 11 that stores the outbound route at predetermined time intervals in order to guide the return route; It is connected to an operating means 5 consisting of a return switch 13 for reading out the locus in reverse, and a clear switch 14 for clearing all the outward loci stored in the RAM 6 as a storage means. The display means 4 and the operation means 5
constitutes an input/output unit 8, which will be described later.

In FIG. 2, the display operation panel 10 constituting the input/output section 8 has a distance display section 4A made of liquid crystal that displays a three-digit numerical value in the center to display the distance from the current positioning position. ing. Further, around the distance display section 4A, there are 2
There is a vehicle traveling direction display section 4B that displays the current direction of travel of the vehicle every 2.5 degrees, and on the outer periphery of the vehicle travel direction display section 4B, the direction in which the vehicle should travel is displayed every 22.5 degrees. A guide direction display section 4C is formed to guide and display. The display operation panel 10 includes an outgoing path switch 11 that stores the outgoing path at predetermined time intervals, a current position registration switch 12 that manually registers the current positioning position, a homeward path switch 13 that displays the outgoing trajectory in reverse, and a memory. A clear switch 14 is provided for clearing all outbound trajectories stored in the means 6.

Next, the operation of the automobile route guide device according to one embodiment of the present invention will be explained.

3 and 4 are flowcharts of the main program of the calculating means 3 of the route guide device for a vehicle according to an embodiment of the present invention. FIG. 5 is a flowchart of the "positioning data storage operation" used in the main program of FIG.

In step S1 of the main program, the memory used for this control is cleared and each output port is initialized. In step S2, by pressing the clear switch 14 for clearing the storage means 6, it is determined whether the clear switch 14 is kept in the on state. If it is determined in step S2 that the clear switch 14 is maintained in the on state, all storage areas of the storage means 6 are cleared in step S3. In step S4, it is determined whether the GPS receiver 2 is positioning, and if it is not positioning, the routine starts from step S11.

When it is determined in step S4 that the GPS receiver 2 is performing positioning, the current positioning position is calculated in step S5, and in step S6 it is determined whether it is the current registration timing by the built-in timer of the calculation means 3, and the current position is registered. If it is not the timing, it is determined in step S7 whether the current position registration switch 12 for manually registering the current positioning position is turned on.

When the current location registration switch 12 is off, step S4
Then, the routine from step S7 or step S11 onward is repeatedly executed.

When it is determined in step S6 that it is the current registration timing, and in step S7 it is determined that the current position registration switch 12 for manually registering the current position position is turned on,
In step S8, it is determined whether the forward path switch 11, which stores the forward path at predetermined time intervals, is turned on. When it is determined that the forward path switch 11 is off, it is determined in step Sll that the backward path switch 13, which continues to output the forward trajectory in reverse, is turned on, and when the backward path switch 13 is also off, the routine from step S4 is repeatedly executed.

When it is determined in step S8 that the outward route switch 11 for storing the outward route at predetermined time intervals is turned on, a routine of "positioning data storage operation" is entered in step S9.

When it is determined in step Sll that the return switch 13 for reading out the outward trajectory is turned on, the maximum value m of the addresses in which the positioning positions have been stored is set in step S12. Step 8
In step 13, addresses m and m-1 of the address counter are specified using the maximum value of the addresses in which the positioning positions have been stored, and the positioning data are successively called in the reverse order of the storing order. First, from the positioning data stored in address m and address m-1 in step S14, the positioning data of the passed position is compared with the positioning data of the next arriving position, and The direction of the next positioning position to be arrived at from the current positioning position is calculated. In step 815, the positioning data of the positioning position passed through is compared with the positioning data of the stored positioning position to be reached next, and the straight line distance d from the current positioning position is calculated. Note that at this time, it is also possible to calculate the straight-line distance to the starting point. In step 816, the linear distance d to the positioning position is compared with a predetermined distance La for starting the lighting display, and if the linear distance d to the current positioning position is not within the predetermined distance La, in step 817 the current A distance display section 4A that displays the distance to the measured position, a vehicle traveling direction display section 4B that displays the current direction of travel around the distance display section 4A, and a memorized vehicle traveling direction display section 4B that displays the current direction of travel around the distance display section 4A. The guidance direction display section 4C that guides and displays the direction of the positioning position, that is, the direction in which the own vehicle should proceed, continuously lights up to display the direction. In this display state, in step S16, the routine from step S15 to step S17 is performed until the straight-line distance d to the current positioning position becomes within a predetermined distance La.

When the straight-line distance d from the positioning position becomes within the predetermined distance La in step S16, the straight-line distance d from the positioning position is compared with a predetermined distance Lb at which the blinking display starts in step 818, and the straight-line distance d from the positioning position is determined. Predetermined distance L
If within b, in step S19, the distance display section 4A displays the distance to the current measured position on the display operation panel 10, and the own vehicle traveling direction display section 4B displays the current traveling direction around the distance display section 4A. , the guide direction display section 4C displays the direction in which the own vehicle should travel in a blinking manner repeatedly. In this blinking display state, the routine of steps S15, S16, S18, and S19 is performed until the straight-line distance d to the measured position is no longer other than the predetermined distance Lb in step S18.

If the straight-line distance d to the positioning position is other than the predetermined distance Lb in step 818, the address m of the address counter is set to m-1 in step S20, and the forward path switch 11, current position registration switch 12, return path switch 13, If the operation of the clear switch 14 is determined and the operation of any switch is not confirmed, the routine processing from step 813 is repeatedly executed, and if the operation of any switch is confirmed, the process returns to step S1.
Return to the routine processing from.

When the "positioning data storage operation" routine is called in step SIO, the process starts as shown in the flowchart of FIG.

First, in step S31, step S of the main program is
The address counter n (n+1) initialized at 1 is set, and in step S32 it is determined whether the value of the address counter n is larger than the maximum address m of the RAM, which is the storage means 6, and the value of the address counter n is set to n+1. (When there is no
Since the data can be stored in the predetermined address of the address counter, the positioning data measured by the GPS receiver 2 is stored in the memory specified by the address counter n in step 833, and this routine is exited.

Further, when it is determined in step S32 that the value of the address counter n is larger than the maximum address m of the storage means 6, in step S334, the address counter n is set to address 2 (n
-m), and in step S35 address 2 (n
-m) in the storage means 6 is erased, and the address 2 (n-
Address 2(n-m)+ of storage means 6 specified by m)
Shift the positioning data after 1 to the address side that is smaller by "-1". Then, in step S37, the positioning data measured by the GPS receiver 2 is stored in the memory specified by the address counter m, and this routine is exited.

That is, the operation of this "positioning data storage operation" routine will be explained with reference to FIG. 6, which is an explanatory diagram of the positioning data storage operation of the automobile route guide device according to one embodiment of the present invention.

As shown in FIG. 6(a), in the routine from step S31 to step 833, positioning data D1 to Dm are sequentially stored from address 1 to address m having the maximum address value.
is stored. Then, address m and positioning data DI
In the case of writing the next positioning data in which 11 is stored,
In the routine from step S31 and step S32 to step S37, first, in step S34, the address counter n is set to "2", and as shown in FIG. 6(b), the positioning data of address 2 is cleared. The positioning data at address 3 and subsequent positions are moved by "1" address at a time to the positioning data storage area at address 2, which became empty in step S36,
As shown in FIG. 6(c), the positioning data of address 2 and subsequent positions are carried forward. Address m that became empty in step S37
In the positioning data storage area of , the (m+1)th positioning data of the current positioning is stored at address m. Similarly, next time,
As shown in FIG. 6(d), in the positioning data storage area of address m, the m+2nd positioning data of the current positioning is stored at address m.

The positioning data stored in the storage means 6 is as shown in FIG. 7, which is an explanatory diagram of the contents of the positioning data of the automobile route guide device according to the embodiment of the present invention.

That is, positioning data D1, D of address 1, address 2, address 3, address 4, ..., address m-1, address m1, address m+1, φ..., address m+4
2, D3, D4,...Dm-1% Dm% Dm+
1% φ...,D From the positioning data of m+4 that is closer to the starting point, even addresses are thinned out,
Positioning data closer to the starting point has a density that is half the density of positioning data closer to the final destination. Thereby, even if the storage capacity of the storage means 6 exceeds the storage capacity, information on the measured position of the road on which the vehicle is traveling can be stored.

However, the user of the automobile route guide device of this embodiment, that is, the general user, often knows the location near the starting point based on his/her driving experience, but the geography of the location near the final destination is unknown. Therefore, it is possible to increase the density of positioning data closer to the final destination to provide detailed information to the user.

As can be seen from the above description, the storage timing of the positioning data is determined by the setting of the timer built into the calculation means 3. Therefore, by changing the time limit setting of the timing, the storage timing of the positioning data can be set for long distance or short distance. You can set the drive distance corresponding to the memory for use. Further, on a complicated road, the time limit of the timer may be shortened during the outbound trip so that detailed road information can be obtained.

As described above, the automobile route guide device according to the embodiment of the present invention uses the G
A memory consisting of a positioning detection means consisting of a PS antenna 1 and a GPS receiver 2, and a RAM that stores positioning data at predetermined time intervals, measured by a timer built in the calculation means 3 and consisting of a routine from step S4 to step S9. means 6, and sequentially reads the positioning data stored in the storage means 6 consisting of the RAM in the reverse order of storage, and compares the positioning data of the current positioning position with the positioning data of the next positioning, A calculation means 3 comprising a routine from step 813 to step S16 for calculating the distance to the current positioning position and the direction from the current positioning position, and the distance to the current positioning position calculated by the calculation means 3 and the current positioning It has a distance display section 4A that displays the direction from the position and a guide direction display section 4C, and from step S16 to step S1
The display means 4 includes nine routines.

Therefore, when traveling toward the final destination, the positioning data of the own vehicle position is stored in the storage means 6 at predetermined time intervals using the positioning satellite 7, and on the return trip from the final destination, the Since the positioning data stored when driving toward the final destination is read from the storage means 6 to guide the return route of the own vehicle, there is no need to input specific road data while looking at an atlas. In addition, since the map is displayed directly or by electric signals and the current location is not compositely displayed, the means for displaying the map can be omitted, and the driver can be provided with the driving direction and distance information necessary for driving. This makes it possible to provide an inexpensive route guide device for automobiles.

In addition, since the automobile route guide device of this embodiment automatically inputs road data when driving toward the final destination, the trouble of inputting data can be saved, and if necessary, the current location can be registered. By operating the switch 12, it is possible to register positioning data according to the road condition, and in places with crowded intersections, the positioning data can be stored in the storage means even within a predetermined time interval set by the calculation means 3 or the built-in timer. 6, and can be recalled sequentially on the return trip, allowing detailed guidance information to be reported to the driver.

In particular, since the positioning data of the current position of the vehicle is stored at predetermined time intervals set in the timer,
When driving in urban areas where the vehicle speed is slow, a large amount of positioning data can be obtained, making it possible to provide guidance that matches the driver's sense of driving.

In this embodiment, the calculation means 3 stores the positioning data of the current position of the vehicle at predetermined time intervals set in a built-in timer, and the driving information of the vehicle is manually obtained from the outside. Therefore, the automotive route guide device of this embodiment does not require the output of a sensor installed in the vehicle, and can be installed regardless of the type of vehicle, and the device can be standardized. Furthermore, in the case where the timing at which the positioning data is stored using a timer is changed, the timing at which the positioning data is stored using the timer can be set at an interval from the travel time.

Furthermore, by operating the current position registration switch 12, positioning data with the current vehicle position as the positioning point is stored in the storage means 6.
Therefore, regardless of the predetermined distance interval or time interval, the positioning data with the own vehicle position at that time as the positioning point can be stored in the storage means 6, and the positioning data that is necessary for the return trip according to the driver's judgment can be stored in the storage means 6. The positioning data can be stored in the storage means 6 at necessary locations while the driver is checking the road conditions. Therefore, since they do not display road conditions mechanically, positioning data can be input at intersections where people are likely to make mistakes and use it as road guidance.

In this embodiment, the positioning data of the current position of the own vehicle is stored at predetermined time intervals set in a timer built into the calculation means 3. In this case, the timer is used to obtain the timing to store positioning data, so it is possible to use the functions of the vehicle as is, and in particular, to store positioning data at equal distance intervals by using distance information. can. This type of automotive route guide device can compare the distance traveled on the road with the "straight line distance information" of the positioning data in the driver's mind, and correct the deviation of the distance and direction. Good for memorizing the geography of roads. In addition, for devices that change the timing to store positioning data depending on the distance traveled, the timing to store positioning data can be set at intervals of distance traveled, and once the final destination is determined from the map, There is no possibility that the storage capacity of the storage means is insufficient.

That is, the automotive route guide device of this type of embodiment is as follows:
Positioning detection means consisting of a GPS antenna 1 and a GPS receiver 2 that measure the vehicle position using a positioning satellite 7;
Based on the distance information input to the calculation means 3, the storage means 6 stores positioning data at predetermined distance intervals, and the positioning data stored in the storage means 6 are sequentially read out in the reverse order of the storage order, and the current Calculating means 3 which compares the positioning data of the position and the positioning data of the next positioning position to arrive at and calculates the distance to the current positioning position and the direction from the current positioning position; The display unit 4 may include a distance display unit 4A that displays the distance to the current position and the direction from the current position, a display unit 4 that includes a vehicle traveling direction display unit 4B, and a guidance direction display unit 4c. can.

By the way, the positioning detection means for measuring the position of the own vehicle using the positioning artificial satellite of the above embodiment includes a GPS antenna 1 and a GPS receiver 2 that measure the position of the own vehicle using the positioning artificial satellite 7. When implementing the present invention, it is only necessary that an absolute position or a relative position can be detected as a result.

Further, in the above embodiment, a RAM is used as the storage means for sequentially storing positioning data with the current position of the vehicle as a positioning point at each predetermined time interval or each predetermined distance interval. When carrying out the present invention, since it is only necessary to be able to write and read from one side, any memory that can only be written and read can be used, and a memory built in a microcomputer can also be used.

Then, the positioning data stored in the storage means of the above embodiment is sequentially read out in the reverse order of storage, and the positioning data of the current positioning position is compared with the positioning data of the next positioning, and the current positioning data is When implementing the present invention, the calculation means for calculating the distance to the position and the direction from the current positioning position sequentially reads the positioning data stored in the storage means in the reverse order of storage, and calculates the current positioning position. It can also be configured as a calculation means that compares the positioning data of the next positioning with the positioning data of the next positioning, and calculates the distance to the current position and the direction from the current position.

In this type of embodiment, the guidance information is in a rough state compared to the above embodiment.

Furthermore, the calculation means and display means of the above embodiment can add a distance display between the current position and the final destination obtained from the positioning data of the current position and the final destination. In this type of embodiment, since the remaining distance between the current positioning position and the predetermined positioning position can be displayed, it is possible to inform the driver of the remaining linear distance traveled relative to the total linear distance traveled.

Furthermore, in the above embodiment, a distance display section 4A, a vehicle traveling direction display section 4B, and a guide direction display section 4C display the distance to the current position and the direction from the current position calculated by the calculation means 3. However, when carrying out the present invention, the own vehicle traveling direction display section 4B can be omitted if the traveling direction of the own vehicle is specified on the display operation panel 10. Because it is,
This can be omitted when implementing the invention.

[Effects of the Invention] As described above, in the invention of claim 1, the stored positioning data is stored at predetermined time intervals from the storage means that sequentially stores the positioning data with the current position of the vehicle as the positioning point. are sequentially read out in the reverse order of the storage order, and the calculation means compares the positioning data of the current positioning position with the positioning data of the next positioning position, and calculates the distance to the current positioning position and the distance from the current positioning position. The direction is calculated, and the calculated distance to the current positioning position and the direction from the current positioning position are displayed on the display means.

Therefore, on the return trip from the final destination, the positioning data stored in the storage means when driving toward the final destination is read out, and the atlas is used to guide the return route of the own vehicle. However, it saves the trouble of inputting specific road data, and since the map is displayed directly or by electric signals, and the current position is not compositely displayed, the means of displaying the map can be omitted, which is necessary for operation. It is possible to provide an inexpensive road guidance device that can provide the driver with traveling direction and distance information.

In addition, in this embodiment, the positioning data of the current position of the vehicle is stored at predetermined time intervals set in the timer built into the calculation means, so the device can be installed regardless of the type of vehicle. standardization is possible.

In the invention of claim 2, the timing for sequentially storing the positioning data in the storage means of claim 1 is set at predetermined distance intervals.

Therefore, on the return trip from the final destination, the positioning data stored in the storage means when driving toward the final destination is read out, and the atlas is used to guide the return route of the own vehicle. However, it saves the trouble of inputting specific road data, and since the map is displayed directly or by electric signals, and the current position is not compositely displayed, the means of displaying the map can be omitted, which is necessary for operation. It is possible to provide an inexpensive road guidance device that can provide the driver with traveling direction and distance information.

Furthermore, in this embodiment, since the calculation means uses a distance meter included in the vehicle to store positioning data of the current position of the own vehicle at predetermined distance intervals, it is possible to store the positioning data of the current position of the own vehicle regardless of the type of vehicle. Available for use.

In the invention of claim 3, the calculation means and display means of the automobile route guide device according to claim 1 or claim 2 are configured to calculate the current position obtained from the positioning data of the current position and the final destination. Since a distance display to the final destination is added, in addition to the effect of the invention of claim 1 or claim 2, the remaining travel distance on the return trip can be determined, which can be used as a guide for rest, refueling, etc. be able to.

In the invention of claim 4, the storage means according to any one of claims 1 to 3 thins out the positioning data on the starting point side and stores it on the final destination side when its storage capacity is filled. Because it stores positioning data, the geography of places near the final destination is often unknown.
Even if the storage capacity is exceeded, the density of positioning data closer to the final destination can be increased to provide detailed information to the user.

In the invention according to claim 5, the storage means according to any one of claims 1 to 4 stores positioning data with the current position of the vehicle as the positioning point by operating the current position registration switch. Since the device is equipped with a manual control means for storing data in the storage means, by operating the current position registration switch, the positioning data of the vehicle's current position can be stored in the storage means regardless of the predetermined distance interval or time interval. Based on this judgment, it is possible to specify the necessary points on the way home, and by inputting positioning data manually, especially at intersections where people are likely to make mistakes, it can be used as road guidance that is compatible with people's memory abilities.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of an automobile navigation device according to an embodiment of the present invention, FIG. 2 is a front view of an operation display panel of an automobile navigation device according to an embodiment of the present invention, and FIGS. 3 and 4 are A flowchart of the main program of the calculation means of the automobile route guide device according to an embodiment of the present invention,
FIG. 5 is a flowchart of the positioning data storage operation used in the main program of FIG. The figure is an explanatory diagram of the content of positioning data of an automobile route guide device according to an embodiment of the present invention. In the figure, 1: GPS antenna 2: GPS receiver 3: calculation means 4: display means 4A: distance display section 4B: vehicle traveling direction display section 4C: guidance direction display section 6: storage means 7: positioning satellite be. In the drawings, the same reference numerals and the same symbols indicate the same or equivalent parts. Sagiomi patent applicant Aisin Seiki Co., Ltd.

Claims (5)

[Claims] (1) a positioning detection means for measuring the position of the vehicle using a positioning satellite; a storage means for sequentially storing positioning data with the current position of the vehicle as a positioning point at predetermined time intervals; The positioning data stored in the means is sequentially read out in the reverse order of the storage order, and the positioning data of the current positioning position is compared with the positioning data of the next positioning position, and the distance to the current positioning position and the current positioning are calculated. A route guide device for an automobile, comprising: a calculation means for calculating a direction from the position; and a display means for displaying the distance from the current position and the direction from the current position calculated by the calculation means. (2) positioning detection means for measuring the position of the own vehicle using a positioning satellite; storage means for sequentially storing positioning data with the current position of the own vehicle as the positioning point at predetermined distance intervals; The positioning data stored in the means is sequentially read out in the reverse order of the storage order, and the positioning data of the current positioning position is compared with the positioning data of the next positioning position, and the distance to the current positioning position and the current positioning data are compared. A route for a vehicle, comprising: a calculation means for calculating a direction from the positioning position; and a display means for displaying the distance from the current position and the direction from the current position calculated by the calculation means. Guide device. (3) Claim 1 characterized in that the calculation means and the display means additionally display a distance between the current positioning position and the final destination obtained from positioning data of the current positioning position and the final destination. Or an automobile route guide device according to claim 2. (4) The storage means for sequentially storing the positioning data thins out the positioning data on the starting point side and stores the positioning data on the final destination side when its storage capacity is filled. The route guide device for a motor vehicle according to claim 3. (5) The storage means for sequentially storing positioning data with the current position of the vehicle as the positioning point at predetermined distance intervals is configured to perform positioning data using the current position of the vehicle as the positioning point by operating the current position registration switch. The route guide device for a motor vehicle according to any one of claims 1 to 4, further comprising manual control means for storing data in a storage means.