JPH01142900A - Return route guiding device for automobile - Google Patents

Abstract

PURPOSE:To correctly guide a return route by storing intersecting point data obtained by practically turning right or left in a storage means by operating a direction indicator, and at the time of its return route, successively reading out the intersecting point data in the reverse order and displaying the advancing direction so that right or left return can be appropriately executed. CONSTITUTION:The title device is provided with a distance detecting means 21 for detecting the moving distance of a vehicle, a direction indication detecting means 22 for detecting the operating state of the direction indicator, a deciding/ operating means 25 for deciding right/left turn in accordance with the outputs of both the means 21, 22 and calculating a sectional distance up to an intersecting point on which right/left turn is executed, a storage means 26 for successively storing the data of the means 25, a data reading means 29 for successively reading out the data stored in the means 26 in the reverse order, a display means 30 for displaying data read out by the means 29, and a right/ left turn deciding means 28 for deciding a right/left turn in accordance with the display of the means 30.

Description

[Detailed description of the invention] [Field of application in the transportation industry] The present invention relates to a return route guidance device for automobiles.
This invention relates to a return route guidance device for automobiles suitable for guiding a driver without error.

[Conventional technology]

Conventional return guidance devices for automobiles are, for example, disclosed in Japanese Patent Application Laid-open No. 59
As described in Japanese Patent No. 194297, hermitage point information is stored in response to a change in course of a vehicle by a certain amount or more. Therefore, on winding roads, points other than intersections are stored as point information.

[Problem that the invention seeks to solve]

The above-mentioned conventional technology requires more memory capacity than necessary because points where the vehicle changes course beyond a certain size are stored in the same way as intersections, and guidance is displayed even at points that are not intersections on the return trip. Therefore, there is a problem in that the driver is forced to make unnecessary decisions.

Furthermore, no consideration was given to the fact that if a driver made a mistake at a certain point and returned to the correct stop, the driver would be redirected to the wrong road on the return trip.

The present invention has been made in order to eliminate the above-mentioned problems, and its purpose is to provide a return guidance device for automobiles that can appropriately guide the return journey without forcing the driver to make unnecessary decisions. There is a thing called K.

[Means for solving problems]

In order to achieve the above object, the present invention includes a distance detecting means for detecting the moving distance of a vehicle, a direction indicating detecting means for detecting the operating state of a turn signal, and a determination/calculation means for determining whether a turn has been made and calculating the section distance to the intersection at which the left/right turn has been made; a storage means for sequentially storing data of the determination/calculation means; a group of various operation switches; A data reading means for sequentially reading out data stored in the storage means in an order opposite to the order in which they are read, a display means for displaying the data read by the data reading field means, and a display on the display means. The device is characterized by a left/right turn determining means for determining whether the vehicle has turned left or right while moving along the road.

[Effect]

The return route guidance device for automobiles according to the present invention, on the outward route,
The intersection data necessary to actually turn right or left by operating the turn signal is stored in the storage means, and on the return trip, the stored intersection data is sequentially read from the rear, and this read data is used to determine whether to turn right or left. Signs are displayed so that drivers can properly turn left or right at intersections, and if they make a mistake on their way out and have to turn back to the official road, they should do so while displaying directions to turn right or left in the same way as on their way back. However, by deleting the data of only the part of the road on which the driver drove by mistake, the driver is not forced to make unnecessary decisions and can be guided on the wrong (return) route.

〔Example〕

The present invention will be described in detail below with reference to the drawings. Figure 1 shows a diagram corresponding to claims of the present invention, and 25
is a judgment/calculation means, and this judgment/calculation means 25 is
A distance detecting means 21, a direction indication detecting means 22, an outgoing route start point switch 7, and an outgoing route end point switch 8 are connected to the input side, and the output side is connected to the storage means 26.

Data reading means 2 for reading data from the storage means 26
9 has a return start point switch 9 and left/right turn determination means 2 on the input side.
8 is connected, and the output side is connected to the display means 30.

The second factor is a block factor showing an embodiment of the present invention, and in the figure, 1 is ff1l which detects the mileage of the car
l sensor, which corresponds to the distance detection means 21 in FIG.
A pulse of Noi level/c1-level is generated every time the vehicle travels a certain distance.

Reference numeral 2 denotes a direction indicator sensor that detects the operation state of the direction indicator, and corresponds to the direction indicator detection means 22 in Fig. 1, and when the direction indicator is not operated, outputs 2α and 2b are both a.
- level, when operating to the right, only output 2α becomes high level, and when operating to the left, only output 2b becomes high level.

3 are the outbound path start point switch 7 and the outbound path end point switch 8 in Fig. 1.
This is an operation switch group consisting of various operation switches such as the return start point switch 9 and the like. 4 is a storage device corresponding to the storage means 26 of the first factor, 5 is a display @direction corresponding to the display means 30 in FIG. It is a microcomputer that also serves as a reading means.

FIG. 3 is a diagram showing an embodiment of the main operation switches of the operation switch group 3.

In the figure, numeral 7 indicates an outbound start point switch that indicates the start point of the outbound trip, 8 indicates an outbound end point switch that indicates the end point of the outbound trip, and 9
is a return trip start point switch that indicates the start point of the return trip. Further, 10 is an intersection switch that instructs addition or deletion of an intersection.

FIG. 4 is a diagram showing an embodiment of the display device 5. As shown in FIG.

In the figure, 11 is an indicator that instructs to turn left at the next intersection, and 12 is an indicator that instructs to turn right at the next intersection. Reference numeral 16 is a four-digit display consisting of seven segments that indicates the distance to the next intersection.

The operation of this embodiment will be described below with reference to the flowcharts of FIGS. 5 to 7 showing the operation of the microcomputer 6, which is the second cause.

The series of processes in the flowchart shown in FIG. 5 is started by turning on the power to the return route guidance device or by operating a predetermined switch.

First, in step ST1, the storage device 4 and the display device 5
Perform initial settings such as Next, in step ST2,
It is determined whether the car is on the outbound route or on a route other than the outbound route based on the outbound route flag.

Here, when the car is on the outbound &C, the outbound flag is 11°
, otherwise it is IQI. Therefore step ST
2, when the outward route flag is Mll, step Sr 5V
If the result is 101, the process advances to step ST4.

In step ST3, intersection data on the outbound route is collected according to the flowchart shown in FIG. This establishment will be explained later.

In step ST4, the end point of the outgoing path is determined based on whether the outgoing path end point switch 8 has been pressed. If it is in the middle of the outgoing path, the process proceeds to step ST6, and if it is the end point of the outgoing path, the process proceeds to step ST5. In step ST5, the distance from the previous intersection is stored in a predetermined location of the storage device 4.

In addition, if necessary, the arrival time, distance from the outbound departure point,
The elapsed time from the starting point of the outward route, the average vehicle speed from the starting point of the outward route, the elapsed time from the previous intersection, the average vehicle speed from the previous intersection, etc. may also be stored.

Next, in step ST6, it is determined whether the vehicle is on the return trip or on a route other than the return trip based on the return trip flag. Here, when the car is on the return trip, the return trip flag is 111, otherwise IQI. Note that both the outbound flag and the return flag are never set to 11 degrees.

Therefore, in STELAB ST6, when the return flag is 11'', the process proceeds to step ST7, and when it is .01, the process proceeds to step S.
Return to T2 and perform a series of processing (return page).

In step ST7, since the car is on the return trip, the 7th-
The intersection guidance on the return trip is provided using the a-chart (shown in Figure 1). This explanation will be given later.

Next, in step STB, whether or not the intersection guidance has been completed is determined based on whether or not the first convolution data (9, difference point data) remains in the storage device 4. If the guidance is still in progress, the process returns to step ST2 and a series of The process is repeated (repeat, and when the guidance is completed, the series of processes ends.

Here, the outbound route flag, return route flag, and outbound route start point switch 7.
The relationship between the forward end point switch 8 and the backward end point switch 9 will be explained.

When the power to the return route guidance device is turned on and the operation starts, and when the outward route end point switch 8 is operated, both the outward route flag and the return route flag become 10 degrees, and when the outward route start point switch 7 is operated, the outward route flag is set to °. 1”, return flag is °0
°, and when the return journey start point switch 9 is operated, the outward journey flag becomes °o゛ and the return journey flag becomes 111.

Next, the intersection data collection flowchart shown in FIG. 6 will be explained.

In step 5T31, if the outputs 2α and 2b of the direction indicating sensor 2 are both at low level, it is determined that the intersection is not present, and the process proceeds to step 5T32.

On the other hand, the output 2α of the direction indication sensor 2 is at a high level and 2b
If the output 2α is at the a-level, the intersection is recognized as a right-turning intersection, and if the output 2α is at the a-level and 2b is a high-level, the intersection is recognized as a left-turning intersection, and the process proceeds to step 5T55jfC. In step 5T52, it is determined whether or not the intersection switch 10 is manually pressed in order to add it as an intersection (even though it was not recognized as an intersection in step 5T51). If it is determined that the button is pressed, the process advances to step 5T55, and if it is not pressed, the process advances to step 5T37.

In step 5T35, an intersection annunciator (not shown) such as a buzzer is turned on to notify that the current location of the vehicle will be registered as an intersection.

Processing then proceeds to steps 5T54 and 5T55. Here, the intersection switch 10 determines whether or not to delete the intersection that is currently being registered for a certain period of time.

When the intersection switch 10 is pressed and the judgment in step 5T54 is established (when deleting the intersection), step 5T5 is executed.
The process proceeds to step 7, and if a certain period of time has elapsed without the intersection switch 10 being pressed, the process proceeds to step 5T56.

In step 5T56, in order to filter the intersection data,
The intersection data is stored in the storage device 4. The intersection data to be stored includes the distance from the starting point of the outward route to the first intersection, the section distance between each intersection, the distance from the last intersection to the end point of the outward route, and the direction of right or left turns at each intersection. shall be.

In addition, if necessary, information such as the time at which the intersection passes, the distance from the starting point of the outbound trip, the elapsed time from the starting point of the outbound trip, the average vehicle speed from the starting point of the outbound trip, the elapsed time between intersections, and the average vehicle speed between intersections is also stored. You may also do so. The intersection data to be stored is stored in a predetermined location in the storage device 4 according to the order of the intersections.

When the storage of the intersection data is completed, the process proceeds to step S.
T 37K advance. In step 5T57, an intersection notification device such as a buzzer is turned off. Then, the process returns to step ST4 in FIG.

Next, the operation of guiding the driver to an intersection on the return trip will be explained with reference to the seventh flowchart.

In step 5T71, it is determined by the display plug whether the next intersection guidance information is already displayed. If the display plug is 101, that is, it has not been displayed yet, the process proceeds to step 5T72, and if the display flag is 1, that is, it has already been displayed. If it is displayed, proceed to step 5T73.

In step 5T72, the data stored in the memory filj4 is read in the reverse order of the writing order, and based on the read data, the return route consisting of the distance to the next intersection and the direction of right or left turn at the next intersection is determined. Display the intersection data in the display length [5, and set the display flag to 11
”.

In step 5T75, the travel distance is subtracted from the distance to the next intersection, and the remaining distance to the next intersection is sequentially displayed on the display device 5.

In addition, here, with the display changeover switch (not shown),
Depending on the slow speed, the estimated time to reach the next intersection, the expected time required to reach the next intersection, the expected time to reach the end point of the return journey, the expected time required to reach the end point of the return journey, or the remaining distance to the end point of the return journey, etc. It may also be displayed.

Furthermore, when the vehicle approaches the next intersection, the intersection warning device may be used to sound a buzzer, or to flash indicators 11 and 12 indicating a right or left turn.
Or both may be performed.

In the next step 5T74, it is determined whether the vehicle has passed through an intersection. The judgment to pass through the intersection is made by operating a turn signal in the direction indicated by the indicators 11 and 12 near the intersection, or by pressing the intersection switch 10 when the operator passes through the indicated intersection. It will be done. Here, when it is determined that the intersection has been passed, the display flag is set to 01 in step 5T75, and the process returns to step ST8 in FIG. 5 at step 8.

Next, a specific example of the operation will be shown in FIG.

In FIG. 8, the starting point of the outward journey is A, and the ending point of the outward journey and the starting point of the returning journey are I.

First, at point A, the outward journey start point switch 7 is pressed. Next, intersections B and C are automatically registered by operating the direction indicators. Next, at an intersection, the intersection is additionally registered using the intersection switch 10, since although the vehicle travels along the same street on the outbound route, it becomes a branching intersection on the return route.

At the next intersection E, you mistake the place to turn left and go straight, and after driving through intersection F to point G, you realize that you have taken the wrong turn. At that time, you press the return start point switch 9 and are directed to the intersection. while returning to intersection E. Since the intersection data during this time is deleted while returning, the data at points F and G are deleted.

Then, by pressing the outbound start point switch 7 at intersection E, the intersection data from point A to point D is followed by E,
H intersection data collection is performed. Then, by pressing the forward end point switch 8 at one point, the intersection data collection is completed.

On the return trip, intersection guidance is provided by pressing the return trip start point switch 9 at one point. At intersection E, where the driver made a mistake on the way out, the intersection data for F and G have already been deleted, so next time the intersection information will be displayed.

In the embodiment described above, the outbound trip start point switch 7, the outbound trip end point switch 8, and the inbound trip 2 start point switch 9 are provided. Switches can be removed.

Further, instead of the direction sensor 2 that detects the operation state of the direction indicator, a direction input switch that can input two or more directions, ie, a right turn and a left turn, may be provided.

Furthermore, the right turn/left turn indicator 11 shown in FIG.
Reference numeral 12 may indicate not only two directions (or may indicate more than two directions), but may also be a display device that can freely display characters and figures in the form of a dot matrix.

In addition, when the intersection data in the memory device @4 exceeds the storage capacity and there are intersections, by erasing the i-1st intersection data and entering new intersection data, the intersection guidance on the return trip is possible, even if it is only halfway. becomes possible.

〔Effect of the invention〕

As is clear from the above explanation, (1) according to the present invention, the driver is not forced to make unnecessary decisions when guiding the return route, so that even when driving to an unfamiliar area, the driver can return to the starting point without making a mistake. There is d

[Brief explanation of the drawing]

Fig. 1 is a diagram corresponding to claims, Fig. 2 is a block diagram showing an embodiment of the present invention, Fig. 3 is a diagram showing an example of the main operation switches of the operation switch group of the wc2 diagram, nest 4- is straw 2 5 to 7 are flowcharts for explaining the operation of the microcomputer shown in FIG. 2, and FIG. 8 is a diagram showing a specific example of operation. 7... Outbound trip start point switch 8... Outbound trip end point switch 9... Return trip start point switch υ... Distance detection means 22
... Direction indication detection means 25 ... Judgment/calculation means 2
6...Storage means 28...Right/left turn determination means 29...Data reading means 30...Display means Patent attorney Katsuo Ogawa 1st figure 2nd figure 3rd figure 4th figure S Figure 1 Figure 7 Figure 6

Claims (1)

[Claims] 1. Distance detecting means for detecting the distance traveled by the vehicle; Direction detecting means for detecting the operation state of the turn signal; An outbound start point switch for indicating the starting point of the outbound trip; an outbound destination end point switch for indicating the end point of the outbound trip; Turn right or left according to the output from the direction indication detection means and the output from the distance detection means between the time when the outbound start point switch is operated and the outbound end point switch is operated. a determination/calculation means for determining whether the left/right turn has been made and calculating the section distance to the intersection at which the left/right turn was made, and a storage means for sequentially storing data on the right/left turn and section distance of the judgment/calculation means; After the return trip start point switch is operated, the data on the right and left turns and section distances stored in the storage means are written in the order in which the left and right turns and section distance data stored in the storage means are determined according to the determination result of the left and right turn determination means, which will be described later, that the intersection has been turned left and right. a data reading means for sequentially reading data in a reverse order; a display means for displaying at least the distance to an intersection at which a right or left turn should be made on the return trip and the direction of the right or left turn based on the data read by the data reading means; A return route guidance device for a motor vehicle, comprising: a right/left turn determining means for determining whether a right or left turn has been made at an intersection according to a display on the display means. 2. The determination/calculation means and the data reading means are
2. The return route guidance device for a motor vehicle according to claim 1, characterized in that it is constituted by a microcomputer. 5. Claims 1 to 2, characterized in that the operation of the return journey start point switch can be performed even after the outbound journey start point switch is operated until the outbound journey end point switch is operated. The return route guidance device for a motor vehicle according to any one of paragraphs. 4. If the forward trip start point switch is operated after the return trip start point switch is operated but before the reading of the data string stored in the storage means is completed, the data string remaining in the storage device is not erased and the corresponding data string is 4. The return route guidance device for a motor vehicle according to claim 3, wherein the data is stored subsequent to the existing data. 5. Any one of claims 1 to 4 is characterized in that, in place of the direction indication detection means, there is provided a direction indication input means capable of inputting two or more directions of a right turn and a left turn at an intersection. The return route guidance device for automobiles described in . 6. 2. The return route guidance device for a motor vehicle according to claim 1, wherein the outbound route end point switch is omitted from among the outbound route start point switch, the outbound route end point switch, and the return route start point switch. 7. If the intersection data exceeds the storage capacity of the storage means, the new intersection data is replaced from the first intersection data. The return route guidance device for automobiles described in .