JPS63184009A - Running route display apparatus - Google Patents

Abstract

PURPOSE:To easily confirm the present position even when a running locus is shifted from the road on a map and to make display continuously proper while changing a time display form when the running locus reaches a limit frame, by continuously displaying the running locus from the fixed position to the present position and providing the limit frame to a picture. CONSTITUTION:The running distance and direction of a moving body are detected by distance and direction detectors 1, 2 and the position of the moving body on two-dimensional coordinates at every unit running distance is calculated on the basis of the outputs of the detectors 1, 2 by a signal processing apparatus 3 and the calculation result is stored in a running locus memory apparatus 4. The content thereof is always read to be continuously sent to a display apparatus 5 and, at the same time, the direction signal at the present position is continuously sent from the apparatus 3 to the apparatus 5. Therefore, the display mark M1 of the present position B having directionality and the running locus display mark M2 from a start point A to the position B are imitatively displayed on the apparatus 5 so as to follow the running state of the moving body. Further, a limit frame is provided to the display surface of the apparatus 5 and, when the running locus reaches said limit frame, the display form of the running locus can be changed by an operation apparatus 6.

Description

DETAILED DESCRIPTION OF THE INVENTION Field 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 general, when driving at night or in unfamiliar areas, the driver's seat is used to provide appropriate guidance so that the driver does not deviate from the planned course and get lost. A device has been developed that displays the current location, etc. on a road map that has been previously set up.

Conventionally, in this type of travel route display bag, a distance detection section detects the distance traveled by the vehicle according to the vehicle speed, and a rate type gyroscope or the like is used to detect the angular velocity of changes in one direction. The direction detection unit 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 as point information that changes every moment on the road map. I am trying to display it by.

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 be able to distinguish between 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.

11 verses 1 The present invention has been made in consideration of the above points.

In addition to displaying the current position using point information as in the past,
By continuously displaying the driving trajectory of the vehicle within a certain section from the home position to the current position, even if the current position on the road map deviates from the predetermined course due to the detection error mentioned above, the vehicle's driving trajectory up to that point will be automatically displayed. The present invention provides a driving route display device that can easily determine which road the vehicle is currently traveling on by comparing the trajectory with the road shape on a map.

In this case, especially in the present invention, a limit frame is provided on the screen where the travel trajectory is displayed, and when the travel trajectory displayed on both sides following the travel of the moving object reaches the limit frame, the display form of the travel trajectory is By changing the system, the travel routes of eight moving objects can be displayed continuously and appropriately.

In order to achieve the object, the present invention includes a first detector for detecting a moving microscope part of a moving body, a second detector for detecting a direction accompanying the moving body, and a combination of the first and second detectors. A signal processing device that calculates the two-dimensional coordinate position of the moving body for each unit traveling distance based on each output of the detector, and data on the position on the two-dimensional coordinate that changes every moment obtained by the signal processing device. A traveling trajectory storage device that sequentially stores information on the moving object and retains the contents as continuous position information of the moving object, and a driving trajectory of the moving object is made to correspond to the road map according to the data in the storage device. A display device is provided to display the information on the screen, and in particular, a limit frame is set on the screen, so that when the travel trajectory reaches the limit frame, the display format of the travel trajectory can be changed.

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 includes, for example, a photoelectric, electromagnetic, or mechanical contact type sensor that outputs a pulse signal proportional to the number of tire rotations. It consists of a distance detector 1 that generates a signal according to distance, and a rate type gyroscope that detects angular velocity in one direction, for example, and outputs a signal proportional to the direction or the amount of change in direction depending on the direction of travel of the car. a direction detector 2 that measures the distance traveled by the vehicle by counting pulse signals from the distance sensor 1, and determines the traveling direction of the vehicle from the output of the direction detector 2; a signal processing device i (
A driving trajectory that sequentially stores the constantly changing position data on the two-dimensional coordinates obtained by the CPU) 3 and its signal processing device 3 and holds it as information at a finite consecutive position corresponding to the current position of the car. A storage device (RAM) 4 and a CRT that displays the distance traveled by the vehicle, the travel trajectory in a certain section up to the current position, the current direction of travel, the required time, etc., updated every moment according to the output from the signal processing device 3.
A display device consisting of a display device, a liquid crystal display, etc. [i'
25, a display command is sent to the signal processing device 3, and the display device 5
Change the display format settings as appropriate, such as changing the direction of the travel trajectory displayed in , moving the display position, and selecting the partial enlargement display 1 display scale of the travel trajectory.
Operation device 6 that allows you to arbitrarily set one point
It is composed of.

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

First, when driving a car, the operating device 6 is used to appropriately set a starting point and its display scale on the screen of the display device 5 corresponding to a road map used for guidance. After that, when the car starts running, one pulse signal is sent from the distance detector 1 to the signal processing device 3 for each unit distance traveled, and the distance traveled is calculated by calculating the number of pulses. At the same time, the output of the direction detector 2 is also sent to the signal processing module rrL3, where the direction of movement of the vehicle at every moment is determined. The signal processing device 3 calculates the current position 1i! on the X-Y coordinates according to a preset scaling factor based on the detected changes in the travel distance and direction of the vehicle as described above. (x, y) are calculated moment by moment, and the calculation results are sequentially sent to the traveling trajectory storage device 4 and stored therein. Note that the stored contents are constantly read out and continuously sent to the display device 5. 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. As shown in FIG. 2, the display device 5 shows a directional display mark M1 indicating the current position B and a mark M2 indicating the travel trajectory from the starting point A to the current position [B]. This will be done in a simulated manner, following the current situation. 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 instructions from the operating device 6 so that a check can be made during the travel route. . In addition, as shown in FIG. (It is sufficient to incorporate a timer that operates while driving in the signal processing device 3), and display D of the total distance traveled up to that point.
2. Further, the machining device 6 appropriately displays auxiliary displays such as a display D3 of the scale ratio determined by J2.

Since the display device 5 has a limit to the traveling trajectory that can be displayed on it, when the limit is exceeded, a new starting point A' is set using the operation 'lJ position 6' to allow the vehicle to continue traveling. Just do it.

In this case, especially in the present invention, 1 display'! A limit frame (not shown) is provided on the display screen of the A version 5, and when the travel trajectory displayed on the screen following the travel of the moving object reaches the limit frame, the travel trajectory is changed by the operating device 6. The display format can be changed.

At that time, when the current position B reaches the limit frame, a warning can be issued to notify the driver of this fact.

Specifically, the maximum values in the X-axis and Y-axis directions are set in advance in the signal processing device 3 according to the frames indicating the limits, and the calculated current position (x, y) value is When the maximum value is reached, an alarm output may be given to a separately provided alarm device.

As described above, by comparing the travel trajectory up to the current position displayed on the display device 5 with the road shape on the map, the driver can easily determine which road the vehicle is traveling on. becomes possible.

At that time, even if the driving trajectory displayed on the screen deviates from the road on the map due to cumulative errors caused by long-term viewing, the current position on the map can be confirmed using the operation device 6. 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, you will only have the cumulative error from that part to the current position, and you can compare the position confirmation. You will be able to do things accurately. In addition, since the driving trajectory of a certain section that has passed is displayed and maintained, it is possible to simultaneously grasp the distance and direction of the vehicle's driving relative to past passing points, and if necessary, the driving trajectory Change the scale of , move its display position to match the map, rotate the display direction of the travel trajectory to match the direction of travel of
Alternatively, by enlarging past passage points, the position of the own vehicle can be confirmed efficiently and in detail.

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 direction detection z:(2) output is sent to the interface circuit 8 for serial communication via the A-D converter 7, and the distance is determined by the output of the detector 1. The number of pulses is counted by the counter 9, and the result is sent to the interface circuit 8.A timer 10 is provided in parallel on the output side of the counter 9, and the timer IO allows the counter 9 to operate for a certain period of time or longer. We are trying to detect when the car is stopped and detect when the car is stopped.Also, in front of the car.

A detector 11 for detecting backward movement is provided, and its detection signal is sent to the interface circuit 8 at 1 o'clock during the backward movement, so that the input from the direction detector 2 is inverted during that time. Further, the operation device 6 is constituted by an operation input switch group 61 and an operation input encoder 62 (priority encode) that sends various command signals to the interface circuit 8 in accordance with the combination of the switch contacts. .

Note that rm [IJI indicates an operation interrupt signal, and E indicates an encode output. Also, on the input side,
A digital switch circuit 12 for 13 degree adjustment is provided, thereby making it possible to correct variations on the input side due to changes over time, setting errors, etc. Further, as the signal processing front port 3, a CPU [J t 3 , the CPU 1
an address decoder 14 for decoding the address indicated by .3; Depending on the decoder output, a predetermined control programmer 11 that is stored in large quantities is read out and the data is sent to the CPU 1.
ROM 15 + Sea 1 - R in which data on positions on the two-dimensional coordinates according to the detected value and the detected distance value or data on auxiliary display such as mileage are stored in advance.
AM16. RAM1 according to the address from CPU13
A video RAM controller 18 and an address multiplexer 10 . and a CRT logic controller 1-roller 20. In addition, 2 in the figure
Reference numeral 1 indicates a main power switch linked to, for example, an ignition switch of an automobile, and reference numeral 22 indicates an oscillator for a control clock signal of the CPU 13. Further, in the figure, 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 includes a CRT controller 52 which sends horizontal and vertical synchronizing signals [(, V) to the CRT display 51 in response to commands from the CRT logic controller 20;
It is composed of a shift register 54 that synchronizes with a clock signal from an RT clock oscillator 53 and sends it to the CRT display 51.

In the traveling route display device according to the present invention, the position on the two-dimensional coordinates for each unit traveling distance of the moving object is determined according to the traveling distance of the moving object and the traveling direction thereof, and The system displays the traveling trajectory of a mobile object on a screen corresponding to a road map while sequentially storing data on positions on two-dimensional coordinates that change from moment to moment, and also sets a limit frame on the screen to limit the traveling trajectory. When the frame is reached, the display format of the travel trajectory can be changed, so even if the travel trajectory deviates from the road on the map due to cumulative errors when determining the current position of the moving object, the display format can be changed. It is possible to easily check the current position of a moving object on a map by comparing the driving trajectory with the road shape, and to change the display format of the screen when the driving path reaches a limit frame. This has the excellent advantage that the driving route can be displayed continuously and appropriately.

Figure 1 is a block diagram showing an embodiment of the travel route display device according to the present invention, and Figure 2 is a display diagram of the same embodiment.
FIG. 3 is a block diagram showing an example of a specific circuit of the present invention.

1...Distance indicator 2...Direction detector 3...Signal processing front 4...Travel 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 is composed 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 that can change the display form of a driving trajectory when the limit frame is reached.