JPS63184010A - Running route display apparatus - Google Patents

Abstract

PURPOSE:To easily and accurately confirm the present position by collating a running locus with the road shape on a map at a necessary time, by displaying the running locus from the fixed position to the present position on the picture corresponding to the map and selectively performing the display and non-display of the running locus. CONSTITUTION:A start point is preset on the picture of a display apparatus 5 allowed to correspond to a road map by an operation apparatus 6. The running distance and direction of a moving body are detected by distance and direction detectors 1, 2 with the running of the moving body and the position of the moving body on two-dimensional coordinates at every unit running distance is calculated on the basis of the detectors 1, 2 by a signal processing apparatus 3 and the calculation result is stored in a running locus memory apparatus 4 and held thereto. At the same time, the direction signal at the present position is successively sent from the apparatus 3 to the apparatus 5. However, without always displaying the running locus on the apparatus 5, a display order is emitted to the apparatus 3 from the apparatus 6 if necessary and, by this constitution, the apparatus 3 performs control so as to read the content of the running locus memory apparatus 4 to display the same on the apparatus 5. By this method, a driver collates the running locus with the road shape on a map at a necessary time to make it possible to confirm the present position.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a driving route display device for displaying the driving status of an automobile or the like, such as the current position, driving trajectory, and direction of travel.

In order to prevent the driver from deviating from the planned course and getting lost when driving at night or in unfamiliar areas, there is usually a system installed in the driver's seat in advance to provide appropriate guidance. It has been developed to display the current location on a set road map.

Conventionally, in this type of driving route display device, a distance detection section detects the distance traveled by the vehicle according to the vehicle speed, and a gyroscope of the type 1 to detect the angular velocity change in one direction is used. The direction detection unit used detects the direction and the amount of change in the direction of travel of the car, calculates the current position of the car on the driving route from each detected value, and displays the result on the road map every moment. It is displayed based on point information.

However, in such conventional driving route display devices, detection errors due to gyroscope drift while the car is driving accumulate, and the current position displayed on a map with a complex and dense road network cannot be displayed. There is a high possibility that the point information will deviate from the predetermined course and display the current position on a different road, and the driver must distinguish whether the error is due to an error in the device or whether the vehicle's driving course is incorrect. This makes it very confusing.

The present invention has been made in consideration of the above points, and it not only displays the current position using point information as in the past, but also provides guidance on the travel trajectory of the own vehicle within a certain section from the home position to the current position. In addition to displaying the driving trajectory on a screen that is compatible with the road map used in To provide a travel route display device that can selectively display or hide a travel route.

In order to achieve the object, the present invention includes a first detector for detecting the travel distance of a moving body, a second detector for detecting the direction accompanying the travel, and a combination of these first and second detectors. A signal processing bag that calculates the two-dimensional coordinate position for each unit traveling distance of the moving object based on each output, and sequentially stores the data of the constantly changing two-dimensional coordinate position determined by the signal processing device, A traveling trajectory record 111 device that retains its contents as continuous position information of a moving object, and its record tα
A display device is provided for displaying the travel trajectories of eight moving objects on a screen corresponding to a road map according to the data in the mouthpiece, and in particular, the travel trajectories are displayed on the display device.

It is designed so that it can be selectively hidden.

Hereinafter, one embodiment of the present invention will be described in detail with reference to the accompanying drawings.

As shown in FIG. 1, the driving route display device according to the present invention is comprised of a photoelectric type, electromagnetic type, or mechanical contact type sensor that outputs a pulse signal proportional to the number of tire rotations. A direction detector that outputs a signal proportional to the direction or the amount of change in direction depending on the direction in which the vehicle is traveling, which is composed of a distance detector 1 that generates a signal, and a rate type gyroscope that detects angular velocity in one direction, for example. 2, counts pulse signals from the distance detector 1 to measure the traveling distance of the vehicle, determines the traveling direction of the vehicle from the output of the direction detector 2, and uses the detection signals from both detectors 1.2. A signal processing unit (CPU) that calculates the position on the two-dimensional coordinates of the vehicle for each unit distance traveled and centrally controls the entire device.
3, and a travel trajectory storage device that sequentially stores the constantly changing position data on the two-dimensional coordinates determined by the signal processing device 3 and holds it as finite continuous position information corresponding to the current position of the vehicle. RAM) 4, and a CRT display device that constantly updates and displays the vehicle's mileage, travel trajectory in a certain section up to the current location, current direction of travel, required patent application, etc. in accordance with the output from the signal processing device 3. , sends a display command to a display device 5 such as a liquid crystal display device, and a signal processing device 3-, changes the direction of the traveling trajectory displayed on the display device 5, moves the display position, and displays a partially enlarged display of the traveling trajectory 2. It is comprised of an operating device 6 that can appropriately change the settings of the display format such as selecting the scale factor, and can arbitrarily set the number of stars.

The operation of the travel route display device according to the present invention configured as described above will be explained below.

First, when the vehicle is to be driven, the operating device 6 causes the user to appropriately set a starting point on the screen of the display device 5 corresponding to the road map used for guidance and to set the display scale. After that, when the car starts running, one pulse signal is sent from the distance detector to the signal processing device 3 for each unit distance traveled, and by counting the number of pulses, the distance traveled is measured. At the same time, the output of the direction detector 2 is also sent to the signal processing device 3, where the direction of movement of the vehicle at every moment is determined. The signal processing device 3 calculates the current position 1iff (xty) on the X-Y coordinates every moment based on the detected travel distance and change in direction of the vehicle as described above, according to a preset scaling factor. The calculation results are sequentially sent to the traveling locus storage bag rX14 and stored therein. At the same time, a direction signal at the current position is sequentially sent from the signal processing device 3 to the display device 5. However, 1
In the display bag 5, as shown in FIG. 2, a display mark M1 of the current position [B with directionality] and a travel trajectory display mark M2 from the starting point A to the current position 1i1ffB indicate the driving state of the vehicle. This will be done in a simulated manner.

In this case, it is possible to arbitrarily write a search mark M3 on the travel trajectory display mark M2 displayed on the display device 5 according to an instruction from the operation bag [6] so that a check can be made during the travel route. Further, as shown in FIG. 2, the display device 5 includes a signal processing device i! In response to the signal sent from 3, for example, the display Dl of the time required to travel to the current position [B (this can be done by incorporating a timer that operates while driving in 3 in the signal processing bag), as well as Display D2゜ of total distance traveled so far or operating device 6
Scale set by! Auxiliary displays such as evil display D3 are made as appropriate. Note that the display bag 5 has a limit to the traveling trajectory displayed on it, so when the limit is exceeded, a new starting point A' can be set using the operating device 6 to allow the vehicle to continue traveling. good. In particular, at that time, a frame (not shown) indicating the limit is displayed on the display screen of the display device 5, and when the current position Ii''2B reaches that frame, 2'F'a is emitted to remind the driver. Specifically, it is possible to make a notification to that effect.

The maximum values in the X-axis and Y-axis directions are set in advance in the signal processing device 3 according to the frame indicating the display limit, and the (direct) value of (x, y) is set at the calculated current position. When the maximum value is reached, an alarm output may be given to a separately provided 9m meter.

In particular, in the present invention, the display bag can selectively display or hide the travel locus at 5.

That is, instead of constantly displaying the travel trajectory on the screen of the display bag r115, a display command is issued from the operating device 6 to the signal processing device 3 as needed, and the signal processing device 3 thereby displays the travel trajectory in the travel trajectory storage device 4. Read and display the contents of the bag
A control means is provided for displaying the traveling locus in the vehicle 5.

In this way, when necessary for guidance, the operating device 6
The driver can easily determine which road the float is traveling on by selectively comparing the travel trajectory up to the current position displayed on the screen of the display device 5 with the road shape on the map. It becomes possible to distinguish between

At that time, even if the driving trajectory displayed on the screen deviates from the road on the map due to cumulative errors due to long-term distance relationships, the current position on the map can be confirmed by operating the operating device 8 or 6, for example. If you move the driving trajectory appropriately and rotate it twice and compare it with the road shape on the map using the final characteristic curve part as a reference, there will only be an accumulated error from that part to the current position, making it relatively accurate to confirm one position. You will be able to have your child do the same thing. In addition, since the running trajectory of a certain section that has passed is displayed and maintained, it is possible to simultaneously grasp the distance and direction frlA of the float running with respect to past passing points, and the running trajectory can be changed as necessary. By changing the scale, moving the display position to match the map, rotating the display direction of the running trajectory to match the direction of the float, or enlarging past passing points,
It becomes possible to efficiently and accurately confirm the location of floats.

Further, FIG. 3 shows a specific example of the configuration of the travel route display device according to the present invention.

In this configuration, first, the rate output of the direction detector 2 is sent to the interface circuit 8 for serial communication via the ADD converter 7, and the number of output pulses of the distance detector 1 is sent to the counter 9. The result is sent to the interface circuit 8. In addition, a timer lO is provided in parallel on the output side of the counter.
The timer IO detects when the counter 9 does not operate for a certain period of time or more, thereby detecting that the vehicle is in a stopped state. Also, in front of the car.

A detector 11 is provided to detect when the vehicle is moving backwards, and when the vehicle is moving backwards, its detection signal is sent to the interface circuit 8, during which time the input from the direction detector 2 is inverted. Further, as the operation device 6, an operation input switch group 61
and an operation input encoder 62 (
priority encoding).

In the figure, 1 indicates an operation interrupt signal, and E indicates an encode output. Further, a digital switch circuit 12 for sensitivity adjustment is provided on the input side, thereby controlling changes over time on the input side.

This makes it possible to correct variations due to setting errors, etc. . Further, as the signal processing device 3,
CPUl3 and its CPtJ for central control
an address decoder 14 for decoding the address indicated by 13; A predetermined control program stored in advance is read out according to the decoder output, and the data is sent to the CPU 1.
ROM15. Sea 1 - Detection value and distance detection 1
[R A in which position data on two-dimensional coordinates or auxiliary display data such as mileage according to [f] is stored in advance.
Ml[E, RA according to the address from CPU13
A video RAM controller 1-roller 18 and an address multiplexer 19. and CRT logic controller 20
It consists of In addition, 21 in the figure is a main power switch linked to the ignition switch of a car, for example.
Further, 22 indicates an oscillator for a control clock signal of the CPU 13, respectively. Further, in FIG. 1, CLK indicates a serial communication clock signal, SL indicates a serial communication output, and S2 indicates a serial communication input. Furthermore, the display device 5
In response to commands from the CRT logic controller 20, horizontal and vertical synchronizing signals H are sent to the CRT display 51.
, V to the CRT controller 1-roller 52. Video RAM
The shift register 54 sends the data read from the CRT display 51 to the CRT display 51 in synchronization with the tarlock signal from the CRT clock oscillator 53.

As described above, in the traveling route display device according to the present invention, the position 'rL on the two-dimensional coordinates of the unit traveling distance of the moving object is determined according to the traveling distance of the moving object and its traveling direction, and While sequentially storing the obtained position data on two-dimensional coordinates that change every moment, the traveling trajectory of the moving object is displayed on a screen corresponding to a road map used for guidance.

In particular, at that time, it is possible to selectively display or hide the driving trajectory.When necessary, the driving path is displayed on the screen and compared with the road shape on the map to determine the current position of the vehicle. It has the excellent advantage of allowing easy and accurate confirmation.

[Brief explanation of the drawing]

FIG. 1 is a block configuration diagram showing an embodiment of the travel route display device according to the present invention, FIG. 2 is a diagram showing one display form of the display device in the same embodiment, and FIG. 3 is a specific circuit diagram of the present invention. FIG. 2 is a block diagram showing a configuration example. 1... Range alarm device 2... Direction detector 3... Signal processing device 4... Driving trajectory storage device 5... Display device 6... Operation device

Claims (1)

[Claims] A first detector detects the travel distance of the moving body, a second detector detects the direction of the travel, and the unit travel of the mobile body is determined based on the respective outputs of these first and second detectors. A signal processing device calculates the position on the two-dimensional coordinates for each distance, and the data of the position on the two-dimensional coordinates that changes every moment obtained by the signal processing device is sequentially stored, and the contents are stored as continuous position information of the moving object. It consists of a travel trajectory storage device that stores the travel trajectory, and a display device that displays the travel trajectory of the moving object on a screen that corresponds to a road map according to the data in the storage device. A driving route display device characterized in that display can be selectively performed.