JPS5960214A - Road guiding device for vehicle - Google Patents

Abstract

PURPOSE:To perform accurate road guidance on a returning trip, by providing a camera at the rear part of a vehicle, photographing and storing the rear view from the vehicle on an outward trip, and reversely reproducing and displaying the film on the returning trip. CONSTITUTION:A camera 1 is provided so that it can take the photographs widely at a slightly upper rearward direction from a vehicle. A display device 2 is provided on the left side of an instrument panel. An instructing means is constituted by an outward trip switch 6, a returning trip switch 7, and a start switch 8. A control means is constituted by a control device 3, which controls the display device 2 and a microcomputer 10. The data for the rearward visual field is obtained by the camera based on the photographing instruction signal. Then the data is stored in the microcomputer 10. The data is reversely reproduced by the instruction at the returning trip and displayed on the display device 2 in the vehicle.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a road guidance device for a vehicle that provides road guidance on a return trip based on road information recorded on an outbound trip.

Conventionally, this type of device stores the distance of the section until turning left or right by operating the forward direction (H finger) and the left/right turn information, and stores it every time the distance of that section is traveled on the return trip. There is a device that displays left/right turn information and right/left turn information with reverse logic.

However, in this case, the right turn by direction indication operation,
Because it can only memorize information for turning left and going straight, it is unable to provide accurate road guidance on the return trip at complex intersections. Wrong route 1 on the way back? There is a problem with δ Kannai.

The present invention photographs and stores the view behind the vehicle on the outward journey, and
By reversing it and displaying it,
It is an object of the present invention to provide a vehicle state highway 178 guidance device that solves the above problems.

The present invention will be described below with reference to embodiments shown in the drawings.

FIG. 1 is a diagram for explaining the general configuration of the present invention, in which a camera 1 installed at the rear of the vehicle interior memorizes the rear view of the vehicle on the way back. The display device 2 installed in front displays the vehicle's rear view photographed and stored on the outbound trip 118 in reverse, thereby providing road guidance on the return trip.

FIG. 2 is an overall configuration diagram showing an embodiment of the present invention. 1.2
is the same as that shown in Fig. 1. To explain in more detail, the camera 1 is installed so that it can take a wide-angle photograph of the rear of the vehicle and slightly above, and the display device 2 is of a cathode ray tube type, and the instrument It is located on the left side of Menthanel. 3 is a control device that controls the camera 1 and the display device 2; upon receiving a photographing command signal from the outside, the camera 1 performs a photographing operation to obtain data on the rear visibility of the vehicle and stores this data; Further, when receiving a display on command signal from the outside, the display device 2 is turned on, and further, when receiving a reverse reversing command signal, the state for reproducing and displaying the memorized rear view of the vehicle in reverse is set. It has a function of stopping the reverse playback display when it receives a stop command signal. Each of these components 1. ．． 2.3 is the switch part for conventional video equipment.
Shooting switch of camera 1, power switch of display device 2,
The reverse playback switch and stop switch part of the video display can be used as an external flt command signal. It is configured to create

4 is a vehicle speed sensor that generates a vehicle speed pulse with a frequency that corresponds to the vehicle's running speed; 5 is a turn signal switch that generates a turn signal signal when either a right or left turn is being performed; and 6 is a turn signal switch that generates a turn signal. Push-lock type forward switch that is turned on during the outward journey, 7 is a push lock type switch that is turned on during the return journey, l: + - Tsuk-type return switch, 8
Is the star of the return ceremony for giving instructions on the outbound and return journeys!・Switch 9 is a return type optional switch that is operated when you want to take a picture of the rear view of the vehicle.

10 is a microcomputer that executes digital calculation processing by software according to a predetermined control program, and includes a CPU, ROM, and RAM.

It is composed of the main parts such as the I10 circuit section, black and ri generation section, etc., and is connected to the ice crystal oscillator 11. 3 to 5 in response to signals from each of the above-mentioned components 4 to 9.
The arithmetic processing shown in the figure is executed, and in accordance with the arithmetic processing, the various command signals described above are issued to the control device 3, and a buzzer operation command signal for generating a buzzer is also generated. Note that the above IMA has a 7.
Even when the 1T vehicle is not in operation (when the ignition is turned off), power is supplied from the on-board vehicle.

Reference numeral 12 denotes a pulley drive circuit 11δ having a timer function that operates the buzzer 13 for a predetermined period of time (2 to 3 seconds) upon receiving a buzzer activation command signal from the microcomputer 10.

Of the above-mentioned components, the control device 3 and the microcomputer 10 constitute a control means, the display device 2 constitutes a display means, constitutes an instruction means.

The operation of the above structure will be explained with reference to the operation flowcharts not shown in FIGS. 3 to 5. Now, in a vehicle equipped with each of the components shown in FIG. 2, when the vehicle key is turned on (ignition on) at the start of operation, power is supplied from the vehicle's on-board battery and the various electrical systems become operational. When the microcomputer 10 starts operating, the registers, counters, latches, etc. in the microcomputer 10 are first set to the initial state necessary for starting arithmetic processing. The calculation process shown in FIG.
Repeat step c).

In the arithmetic processing shown in FIG. 3, if neither the forward switch 6 nor the return switch 7 is turned on, the determinations at steps 101 and 109 are both No, and a standby state is reached for the forward and return operations. It has become.

In this state, when traveling back and forth to a certain destination, first turn on the outward route switch 6 to memorize the outward route, and when you arrive at Ste Nobu Lot, the judgment will be YES.
Become S. The process then proceeds to step 102, where it is determined whether or not the start switch 8 has been operated. However, if the forward switch 6 has just been turned on and the start switch 8 has not yet been operated, the determination becomes NO, and further steps are performed. If the process proceeds to step 108 and the forward 1/8 scoot flag remains reset, the determination becomes NO. Thereafter, the above calculation process is repeated until the start switch 8 is operated, and the system waits for the start switch 8 to be operated.

And then Ill! When the start switch 8 is operated to start traveling, the determination becomes YES when reaching step 102, and the process proceeds to step 103, where the distance data D indicating the distance traveled from this starting point is set to 0.
Then, the process proceeds to step 104, where the initial area is set to indicate the travel distance that provides the start timing for the reverse playback operation on the return trip (the travel ratio at the end of the photographing operation on the outward trip), and the process proceeds to step 105. An indication of an area for storing the traveling distance month 1 (the traveling distance at the start of the photographing operation on the outward trip) which provides the stop timing of the reverse playback operation in the return 11δ is set in the initial area. The instructions for the start and stop areas are incremented by one by increment and decrement commands.
It is starting to decrease. Furthermore, the process proceeds to step 106 to set the outward scoot flag, and step 107
Proceed to and reset the return trip 1 flag. By setting the outbound start flag, the determination at step 108 becomes YES, and the process proceeds to the outbound trip storage routine 200, where arithmetic processing 111' and storage end, shown in FIG. 4, are executed.

It should be noted that when the start switch 8 is turned on after completion of the closing operation, the determination in step 102 becomes No, and the process directly proceeds to step 108.

In the outward route storage routine 200, the calculation process starts from step 201 in FIG. 4, and the distance data D is added and updated using the vehicle speed pulse from the vehicle speed sensor 4. At this time, if the direction indication operation is not performed, no turn signal signal is generated from the turn signal/f Nona 5, and the optional operation switch 9 is not operated, step 202.213! 111 is set to NO, and if the photographing flag indicating that a photograph has been taken is also turned on, the determination at step 214 becomes NO, and the blinker switch 5 or the optional ti-operation switch 9 is turned on.
It is in a state of waiting for a signal to be generated.

Thereafter, when the driver performs a direction indicating operation to turn right or left, a blinker signal is generated from the steering wheel control switch 5, so the determination in step 202 becomes YES. Then, the process proceeds to step 203, and since the first flag has been set by then (seven times from step 222, which will be described later), the determination becomes YLES, and step 204
Proceed to 1f! and write the distance data 1] in the area on the stop side where the area is specified C! Step 205 then increments the area instruction on the stop side, step 206 where the distance data d for continuing photography is reset to 0, and step 207 where the first flag is reset. Then, the process proceeds to step 208, where the vehicle speed is calculated based on the information from the vehicle speed sensor 4, and step 20
The process proceeds to step 9, where it is determined whether the vehicle is stopped or not based on the vehicle speed value. And if it is not stopped, the judgment is NO.
Then, the process proceeds to step 210, where a photographing command signal for photographing the rear view of the vehicle is held in the control device 3 and generated, and the process proceeds to step 211, where the photographing flag is set. Also, when step 203 is reached next time, since the first flag has been raised, the determination will be No, and the process will directly proceed to step 208. Furthermore, if the vehicle is stopped in the middle of an intersection, the determination at step 209 becomes YES, and step 212
Then, the generation of the previously generated photographing command signal is canceled, and photographing is temporarily stopped.

Thereafter, when the right turn or left turn is completed and no turn signal signal is generated from the turn signal switch 5, the determination in step 202 becomes No, and step 21
When step 214 is reached via step 3, the determination becomes YES because the photography flag is set, and the process proceeds to step 215, where a photography command signal is generated to the control device 3 (by then, the photography command signal has not been generated). When the signal is generated, there is no change in the signal, but if the generation of the photographing command signal is divided by 1η゛(ζ) in step 212, the photographing command signal υ is generated again, and the process proceeds to step 21G. Photographed FIIH, 7011 by vehicle speed pulse from vehicle speed sensor 4.
The distance 81 [adding data d] is updated, and the process proceeds to step 217, where it is determined whether the distance Mlt data d has reached the value of l Q Q nt.

At the first arrival, the distance data d is 0 or a value close to O, so the determination becomes No.

The /liI calculation process described above is repeated until the distance data d reaches a value of 100 m, and the distance data d is sequentially added and updated as the vehicle travels.

Thereafter, when the distance data d reaches the value of 100 rr+, the determination at step 217 becomes YES, and the process proceeds to step 218, where the photographing tjt is sent to the control device 3.
The generation of the command signal is canceled, the process proceeds to step 219, the distance data D at that time is stored in the start side area specified by the area, and the process proceeds to step 220, where the start side area instruction is incremented by L, step Proceed to step 221 to reset the shooting flag, and proceed to step 222 to reset the shooting flag.
Set the second flag. Then, when the photographing flag is reset and step 214 is reached from the cooking stage, the determination becomes NO.

Note that the above process is performed in the same way for the M operation when the optional operation switch 9 is turned on, and photographing starts from the time the optional operation switch 9 is turned on, and stops when the vehicle has traveled 100 meters from the time when the turning operation is released.

Thereafter, each time a direction indicating operation is performed (a turn signal signal is generated from the turn signal switch 5) or the arbitrary operation switch 9 is turned on, the photographing operation is performed by the calculation process described in 1. Distance data D at the time of photographing start is stored in the stop side area, and distance data D at the time of photographing end is stored in the start side area. Therefore, each area on the stop side and each area on the start side respectively store distance data at the start of shooting and distance data at the end of shooting.

Then-C, when the vehicle reaches the destination and releases the on state of the outward route switch 6, the determination in step 101 in FIG. 3 becomes No, and the arithmetic processing for storing the outward route ends.

Furthermore, even if the vehicle operation is temporarily interrupted to take a break during the 118-mile trip, the RAM of the microcomputer 1° is constantly supplied with power from the on-board battery.
When the operation is restarted, the previous calculations can be performed continuously without losing the data up to that point.

Thereafter, when the vehicle is started to be driven for the return journey (ignition) and the return switch 7 is turned on, the determination becomes YES when step 109 in FIG. 3 is reached. Then, until the start switch 8 is operated 1M, the determination in step 110 becomes No, and since the return star I flag has been reset, the determination in step 117 becomes No.

Then, when the start switch 8 is operated to start the return trip, when step 11o is reached, the determination becomes YES, and the process proceeds to step 111, where the return trip start flag is set, and the process proceeds to step 112, where the outward trip start l flag is set. , the program proceeds to step 113 to set the reproducing flag (described later) to reset mode, and proceeds to step 114 to hold a display on command signal in the control device 3 to turn on the power to the display device 2. occurs, step 11
Proceeding to step 5, the control device 3 retains and generates a signal for a reverse playback command to enable the control device 3 to display reverse playback, and proceeds to step 116 to issue a stop command to stop the reverse playback display. The signal is held in control device N3 and generated. As a result, the control device 3 turns on the power to the display device 2 and enters a standby state for reverse playback display.

Then, based on the cent of the return trip start flag, the determination in step 117 becomes YES, and the return trip display routine 300
Proceed to. Note that when the closing operation of the start switch 8 is completed and it returns to normal, the determination in step 110 becomes NO, and after directly proceeding to step 117, the return trip display routine 3 is started.
It will now advance to 00. In this isL IIR display routine 300, the arithmetic processing starts at step 301, not shown in FIG. 5, and the distance data 1 is updated by the vehicle speed pulse from the IT speed sensor. and,
Proceeding to step 302, it is determined whether or not the reproducing flag is set to 1, and since the reproducing flag is set to 1 at the previous step 113, the determination becomes No at the first arrival. Proceeding to step 303, the stored data l) s written in the area on the scooting side specified by the area is read out, and the process proceeds to step 304, where the distance data IJ updated by subtracting °C from step 301 is added. , it is determined whether the protruding distance data I) has reached the value of s + 2QQrn. At this time, the distance data r] is still 11 data I, and the distance data r] has just started traveling.
) s l-20Q If the value of rn has not been reached,
The judgment becomes No.

After that, the return trip progresses, and in step 301, is the reduction ψ further increased? J "If the value of distance M data D becomes small and does not reach the value of distance data Ds→-200m, step 304
When yt>s is reached, the determination becomes yt>s. Then, the process proceeds to step 30.5, where a buzzer activation command signal is generated at the blur drive amount +1812, the process proceeds to step 306, where generation of a stop command signal to the control device 3 is canceled, and the process proceeds to step 307, during playback. The flag is set, and the process proceeds to step 308, where the area designation on the previous start side is decremented by 1.

As a result, the buzzer drive circuit 12 operates to sound the buzzer 13 for a certain period of time to call attention to the reverse playback display, and the control device 3 starts generating a display signal to the display device 2 for the reverse playback display. Then, the reverse playback display is displayed at the +A position 2. Therefore, the display device Mj 2 first starts reproducing and displaying the most shadowed portion of the last -C in the forward path in reverse.

Then, when step 302 is reached next time, since the reproducing flag is set, the determination becomes YP, S, and the process proceeds to step 309, where the distance stored in the stop side area where the ft area is specified. Read the data D and proceed to step 310, where the distance MD subtracted and updated in the previous step 301 is the distance data D[→-20
It is determined whether the value of 0m has been reached. At this time, it has just started the reverse playback display, and the distance data D is
If the E+200 rnO value has not been reached, the determination will be No.

After that, the vehicle advances further and the distance data D changes to distance 1.
1t data I) += When it reaches the value of 12001 units,
When reaching step 310, the determination becomes YES, and the process proceeds to step 311, where a stop Jlt command signal is issued to the control device 3, the process proceeds to step 312, where the reproducing flag is reset, and the process proceeds to step 313. Decrement the area indication on the previous stop side.

As a result, the control device 3 stops generating the display signal to the display device 2 and stops the reverse playback display on the display device 2.

Then, by resetting the playing flag, step 302
When it reaches , the determination becomes No, and the same arithmetic processing as above is repeated.

Thereafter, the distance data D calculated and updated in step 301 is the distance data I) written in the start side area.
s) Each time the value of -200 In is reached, a buzzer indicating the start of the reverse playback display device sounds for a predetermined period of time, and the control device 3 is activated to display the reverse playback display. When the distance data stored in the side area "ζ" reaches the value of Dr=+200rn,
The reverse playback display operation is stopped. Therefore, the display device 2 displays the previous one? The rear view of the vehicle at intersections with convex IM shadows is displayed in reverse at 200 m before the shooting location.

In addition, in the above embodiment, when the vehicle changes course by a predetermined angle, the rear visibility of the vehicle is recorded using the azimuth sensor that detects the traveling direction of the vehicle. Alternatively, the rear view of the vehicle may be photographed at all times during the outbound trip.

In addition, although the photographing is shown to end when the vehicle travels 100 meters from the end of the direction instruction operation or the end of the control operation, the photographing may be ended after a predetermined period of time has elapsed from the start of the photographing.

Furthermore, in order to correct the difference in travel distance between the outward route and the tsl 118, the value of the error 111 (a forward switch may be provided, thereby changing the value of the distance data ■).

Furthermore, a red lamp or the like may be added to indicate that the outbound route is being stored and the return route is being displayed.

IuAs mentioned above, in the present invention, the view behind the vehicle is photographed and stored on the outbound trip, and it is played back and displayed in reverse on the return trip. It is possible to accurately recognize the rra: by comparing the actual rear view of the vehicle taken on the outbound trip with the current visibility, and it is therefore highly effective in preventing mistakes on the return trip even at intersections that are 2 meters long. .

[Brief explanation of drawings]

FIG. 1 is a diagram showing a schematic configuration of the present invention, FIG. 2 is an overall configuration diagram showing an embodiment of the present invention, and FIGS. 3 to 5 are calculations showing arithmetic processing of the microcomputer in FIG. 1. This is a flowchart. DESCRIPTION OF SYMBOLS 1... Camera, 2... Display device, 3... Control device, 4... Vehicle speed sensor, 5... Turn signal switch,
6...Outbound switch, 7...Return! 73 switch, 8
...Start switch, 10...Microcomputer. Representative Patent Attorney Takashi Kabe Figure 1 Figure 1 2 ShiJ Figure 3 Figure 4 Entrance S5 Figure 77-

Claims (1)

[Claims] A camera installed at the rear of the vehicle to photograph the rear view of the vehicle, and an instruction means for instructing the outward 1-8 and 4U roads;
When the instructing means instructs the outward route, the camera performs a photographing operation to obtain rearward visibility data for the outward traveling of the vehicle and stores this data, and when the instructing means instructs the return R1i, the stored rearward visibility data a control means for generating a display signal for reproducing and displaying the rear view in reverse, and a control means installed in front of the driver's seat in the vehicle interior, and reproducing and displaying the rear view of the vehicle memorized on the outbound trip in reverse according to the display signal from the control means. A road guidance device for a vehicle, comprising a display means.