JP2595299B2 - Car return guidance device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an in-vehicle return route guidance device for in-vehicle use and as a vigator for guiding a return route.

[Conventional technology]

As described in JP-A-59-194297, a conventional automobile return path guidance device stores point information as a vehicle changes its course to a certain size or more. In other cases, point information is stored as intersections other than at intersections.

[Problems to be solved by the invention]

The prior art requires an excessive storage capacity to store a point at which a car changes its course to a certain size or more. There was a problem of making unnecessary judgments. In addition, since this point information is one-time information, there is a problem in that, when the user goes to the same place again, he or she goes back to the signboard or the like or goes back to the memory to remember.

SUMMARY OF THE INVENTION An object of the present invention is to provide an inbound return guidance device for an automobile that can perform guidance on an outward route by using a storage device that stores a route while appropriately performing return guidance without causing a driver to make unnecessary determinations. Is to provide.

[Means for solving the problem]

The above object is to provide a device that can take out a storage device from the main body and retain stored information even when it is taken out, store an intersection where a right turn or a left turn is made on an outward route, and turn left or a right turn at the stored intersection on a return route. This is achieved by displaying the instructions in order.

[Action]

Since the determination of the intersection on the outward route is performed by using the direction indication detecting means, the steering detecting means, and the intersection switch, there is no missing of the intersection.

On the return trip, it is possible to specify an intersection based on the intersection data on the outward trip and to guide the user.

Further, the storage means storing the intersection data can be removed from the main body and stored, so that when going to the same point again, guidance on the outward route is possible.

〔Example〕

 Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing an embodiment of an automobile return route guidance apparatus according to the present invention. In FIG. 1, reference numeral 1 denotes a distance sensor for detecting the traveling distance of the vehicle, which generates a high-level / low-level pulse at every constant traveling distance of the vehicle. Reference numeral 2 denotes a direction indicator sensor for detecting an operation state of the direction indicator, and an output 2a when the direction indicator is not operated.
And 2b are both high level, when operated to the right only the output 2a is low level, and when operated to the left only the output 2b is low level. Here, the output level may be reversed between high and low. Next, reference numeral 3 denotes an operation switch composed of various switches. Reference numeral 4 denotes a micro computer, and reference numeral 5 denotes a storage device for storing information such as intersections, which can hold stored data even when it is removed from the main body. Reference numeral 6 denotes an acoustic notifier such as a buzzer, a chime or a speaker, and reference numeral 7 denotes a display device for displaying various information.

FIG. 2 is a view showing one embodiment of a main switch of the operation switch. Reference numeral 31 denotes a forward-side starting point switch for designating the start point of the outward path, and 32 denotes a forward-side end point switch for designating the final point of the forward path. Reference numeral 33 denotes a return guide switch for instructing the start of return guidance, and reference numeral 34 denotes a forward guide switch for instructing the start of forward guidance. Reference numeral 35 denotes a display switching switch for switching the type of information displayed on the display device. In the present embodiment, the number of display switching switches is one, but a plurality of switches corresponding to the type of display may be used.
A rest switch 36 suspends distance calculation from one operation to the next operation. 37 is the intersection switch,
Instruct addition or deletion of an intersection.

Hereinafter, the operation of this embodiment will be described with reference to the flowchart from FIG.

FIG. 3 is a flowchart showing a general flow of the present embodiment, which is started by turning on the power of the apparatus.

In the figure, a process 100 initializes the memory of the microcomputer 4. However, if this device is in operation, only the necessary memory is initialized. Here, the flag and the operation switch 4 in the next process will be described. The flag value and some of the operation switches 4 correspond one-to-one, the flag value is 1 when the forward path start switch 31 is pressed, the flag value is 2 when the forward path end switch 32 is pressed, and the return value is 2. When the guidance switch 33 is pressed, the value of the flag is 3, and when the outward guidance switch 34 is pressed, the value of the flag is 4,
When the break switch 35 is pressed, the value of the flag becomes 5. In process 150, it is determined whether the value of the flag is 1 and if it is 1, process 2
Proceeding to 00, process 200 determines the intersection on the outbound route,
The traveling route information is collected and stored in the storage device 5 in the order of the intersection. While the value of the flag is 1, that is, the forward path start switch
The process 150 and the process 200 are repeated to collect the intersection data from the operation of the switch 31 to the operation of another switch. When the value of the flag is not 1 in the process 150, the process proceeds to the process 250. Here, it is determined whether or not the value of the flag is 2, and if it is 2, the process proceeds to step 300, where the data of the outward end point is stored in the storage device 5, and the collection of the intersection data on the outward route is ended.
At the end of the process 300, the value of the flag is set to 0, the process ends, and the process returns to the process 150. When the value of the flag is not 2 in the process 250, the process proceeds to the process 350. In the process 350, it is determined whether or not the value of the flag is 3, and if it is 3, the process proceeds to the process 400.
Proceed to. In the process 400, the return route guidance process is performed by reading out the intersection data collected on the outward route in the reverse order of the stored data. In the process 450, it is determined whether or not the value of the flag is 4, and if the flag is 4, the process proceeds to a process 500; In the process 500, the intersection data is read out in the same order as the storage order using the eight storage devices 5 already storing the intersection data, and the outward route guidance processing is performed. In the process 550, it is determined whether or not the value of the flag is 5, and if it is 5, the process proceeds to the process 600.
Return to In the process 600, a rest process for counting only the rest time is performed without updating the distance until the rest switch 36 is pressed next time.

FIG. 4 is a flowchart showing one embodiment of the intersection data collection processing 200 in FIG.

First, in process 201, it is determined whether or not the vehicle is at an intersection. If the outputs 2a and 2b of the direction indicating sensor 2 are both at a high level, it is determined that the vehicle is not at an intersection, and the process proceeds to step 202. On the other hand, if the output 2a of the direction indication sensor 2 is low level and 2b is high level, it is determined that the intersection is a right turn intersection, and if the output 2a is high level and 2b is low level, it is a left turn intersection. In the process 202, it is determined whether the operator has manually pressed the intersection switch 37 in order to add the intersection as an intersection even if the intersection is not recognized in the process 201. Here, if the intersection switch 37 is pressed and it is determined that an intersection is to be added,
The process proceeds to 203, and if not pressed, proceeds to the process 207. processing
At 203, the sound annunciator 6 such as a buzzer is turned on to notify that the point where the car is currently located is registered as an intersection. Thereafter, the process proceeds to Steps 204 and 205. Here, it is determined for a certain period of time whether or not the intersection to be registered at the intersection switch 37 is to be deleted. When the intersection switch 37 is pressed and the determination of the process 204 is established (when the intersection is deleted), the process proceeds to the process 207, and when a predetermined time has elapsed without the intersection switch 37 being pressed, the process proceeds to the process 206. In step 206, the intersection data is stored in the storage device 5 in order to register the intersection data. As the stored intersection data, at least the distance from the start of the outbound route to the first intersection, the section distance between the intersections, the distance from the last intersection to the end of the outbound route, and the direction of right or left turn at each intersection are required. . In addition, as necessary, the passing time of the intersection, the distance from the starting point of the outward route, 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 between the intersections, the average vehicle speed between the intersections, etc. are also stored. Is also good. The stored intersection data is stored in a predetermined location of the storage device 5 in accordance with the order of the intersection. When the storage of the intersection data ends, the process proceeds to step 207. In the process 207, the sound annunciator 6 such as a buzzer is turned off, and the process ends.

FIG. 5 is a flowchart showing one embodiment of the return route guidance process 400 and the outward route guidance process 500 in FIG. These two processes are the same except that the order of reading the intersection data and the direction of the right / left turn at the intersection are reversed.

First, in the process 401, it is determined by the display flag whether or not the data of the intersection through which the car will pass is displayed. If the display flag is 1, it is determined that the image is displayed, and the process proceeds to step 404. If the display flag is 0, it is determined that the image is not displayed yet, and the process proceeds to step 402. In process 402, the intersection data to be guided next is read out from the storage device 5, and the right / left turn direction,
The distance to the intersection and the like are displayed on the display device 7. Next processing
At 403, the display flag is set to 1 by saying that the intersection data has been displayed. In the process 404, the data of the displayed distance or time is updated according to the distance or time that sometimes changes. In the process 405, it is determined whether the vehicle has passed the currently displayed intersection. Here, if the vehicle has not passed, the flow chart of FIG. 5 is ended. If it is determined that the vehicle has passed, the process proceeds to step 406. In step 406, 0 is set for the display flag. Next, in step 407, it is determined whether the guidance has been completed. If the guidance is in progress, the flow chart is terminated. If the guidance is completed, the flag used in FIG. finish.

Although not described in the present embodiment, it goes without saying that the sound annunciator 6 is turned on near the intersection to be guided to notify the driver to ensure the guidance.

Further, in this embodiment, only the direction indicating sensor 2 captures data in only two directions of right turn and left turn. However, by using a sensor for detecting displacement in the traveling direction of the vehicle, finer directions can be captured. Thus, more reliable instructions can be given in the guidance.

〔The invention's effect〕

According to the present invention, not only route guidance on the way back, but also route guidance on the way once traveled is performed, so that driving to unfamiliar areas can be performed with ease. or,
If a storage device that stores the travel route of an acquaintance is used, the driver can go safely even where the driver goes for the first time.

[Brief description of the drawings]

FIG. 1 is a block diagram showing one embodiment of the present invention, FIG. 2 is a block diagram showing one embodiment of the operation switch of FIG. 1, and FIG. 3 is a flowchart showing one embodiment of the operation of the present invention. , Fourth
FIG. 5 is a flowchart showing the intersection data collection processing 200 in FIG. 3 in detail, and FIG. 5 is a return path guidance processing 400 in FIG.
5 is a flowchart illustrating the outward route guidance processing 500 in detail. DESCRIPTION OF SYMBOLS 1 ... Distance sensor, 2 ... Direction sensor 3 ... Operation switch 4 ... Microcomputer 5 ... Storage device, 6 ... Sound notification device 7 ... Display device, 31 ... Outbound start switch 32 ... Outbound route End point switch 33 Return guide switch 34 Forward guide switch 35 Display switch 36 Rest switch 37 Intersection switch

 ──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Yoji Matsuoka 1410 Inada, Katsuta, Ibaraki Pref. Car Audio Visual Factory, Hitachi, Ltd. (56) References JP-A-60-59500 (JP, A) JP-A-1-147316 (JP, A) JP-A-63-113800 (JP, A) JP-A-63-304400 (JP, A) Japanese Utility Model Application No. 56-137298 (JP, U) Japanese Utility Model Application No. Sho 62-135916 (JP) , U) Tokubo Sho 62-59360 (JP, B2)

Claims (1)

(57) [Claims] 1. A distance detecting means for detecting a moving distance of a vehicle, a direction indicating detecting means for detecting an operation state of a direction indicator, a forward start switch for indicating a forward start point, and a forward end point for indicating an end point of the forward path. A switch, a return guidance switch that instructs the start of guidance on the return path, a forward guidance switch that instructs the start of guidance on the outward path, an intersection switch that instructs addition and deletion of intersections, and the movement of the car for a break etc. A break switch for instructing a certain point, one or more display switching switches for switching the type of displayed information (for example, distance or time), and from the time when the forward path start switch is pressed to the time when the forward path end switch is pressed. Determining the right or left turn of the intersection according to information from the intersection switch, the distance detection means, the direction indication detection means, the steering detection means,
And determination / calculation means for calculating the position based on the distance / time, etc., of the intersection where the right / left turn was performed, and data obtained by the determination / calculation means are sequentially stored. A return route guidance switch for reading and displaying the right / left turn intersection data stored in the storage device from the back of the data train, and a forward route guidance switch. Then, using the storage means in which the traveling route is already stored, reading out the right / left turn intersection data stored in the storage means from the front of the data string and guiding and displaying the same, and the display switching switch. Display control means for selectively displaying the designated display information; and display means for displaying the display information by the display control means. Return guidance system for a motor vehicle, characterized in that.