JPH0221524B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a vehicle travel guidance system that displays a pattern indicating the apparent direction of a traveling vehicle and the ratio of the distance to the destination to the entire journey.

Conventionally, when a vehicle travels to a predetermined destination, if it is the first time to go to the destination or if the route is unknown, it has been used to find out the route to the destination from a road map and refer to road signs when actually driving. , which gave an idea of the distance and direction to the destination.
When driving such a vehicle, it is often necessary to frequently refer to a route map or a magnet to check the traveling direction and distance, which may interfere with driving operations. In response to this, the applicant has proposed an arithmetic circuit for a vehicle guidance system shown in FIG.

In FIG. 1, a sensor 1 electrically detects the direction of the vehicle with respect to a reference direction (earth magnetic direction), and its detection output is input to a function generator 2.
3 is a distance sensor that electrically outputs the distance traveled using a well-known counter. Multipliers 4 and 5 are connected to the two sin function output terminals and the cos function output terminal of the function generator 2, and the output side of the distance sensor 3 is connected to these. Integrators 6 and 7 and subtracters 8 and 9 are connected to multipliers 4 and 5, respectively. On the other hand, 10 is a circuit for inputting the straight line distance and direction from the starting point to the destination point, and the input signal is sent to the calculator 11 to convert it into actual distance values for each X coordinate and Y coordinate on the map from the starting point to the destination point. The subtracters 8 and 9 are then separated and output. Arithmetic units 12 and 13 are connected to the output sides of these subtractors 8 and 9, which calculate the straight-line distance from the current point to the destination point and the direction of the destination point with respect to the direction of travel of the vehicle. Display device 14, 1 that displays the linear distance and direction in numbers or characters depending on the output signal.
5 is connected.

The operation of such a vehicle calculation running device will be explained based on the running explanatory diagram of FIG. 2. Now, the vehicle starts traveling from the starting point O and reaches the destination point P.
The distance from the current traveling point T to the destination point P and the direction θ of the destination point with respect to the vehicle at the current point
seek. First, a starting point O is input to the input circuit 10.
Input the distance and direction data on the map from to the destination point P,
1, the distance L _E on the abscissa and the distance L _N on the ordinate are separated and output, and these are input to subtracters 8 and 9. On the other hand, the sensor 1 outputs the direction θ ₁ of the vehicle at the current point T with respect to the reference direction, and the distance sensor 3 outputs the cumulative travel distance Δl. Further, the above θ ₁ is input to the function generator 2, and sin θ ₁ and cos θ ₁ are calculated, respectively, and the results are input to the multipliers 4 and 5 together with the above Δl. The outputs of these multipliers 4 and 5 are the final integrated values △lsinθ ₁ and △lcosθ ₁ of the distance and direction data that change every moment up to the current point, and these are the outputs of the integrator 6,
7, the distance from the starting point O to the current point T is the actual distance value in the abscissa and ordinate.
Output as l _E and l _N. These values are
It is input to subtracters 8 and 9 together with L _E and L _N , and L _E -l _E and l _N -l _N are obtained on the output side. This data indicates the distance from the current point T to the destination point P on the abscissa and ordinate, and is data on the remaining trip. Furthermore, such data is input to the calculators 12 and 13, and the calculator 12 calculates √( _N − _N ) ² +( _E −
L _E ) ² is calculated and the remaining distance L from the current point T to the destination point P is output.
The direction of the destination point relative to the direction of travel of the vehicle in
Calculate and output tan ^-1 (L _E -l _E /L _N -l _N ) = θ ₂ and θ = θ ₂ - _{θ 1} . These data are input to the display devices 14 and 15, and the remaining distance L and direction θ are displayed.
is displayed using numbers or characters. For example, right direction
125°, 39Km, etc. are displayed. In this way, when attempting to display the remaining distance L and direction θ, digital display is generally considered. With such a digital display, it is difficult to intuitively understand the remaining distance and direction. For example, if the total trip is 177Km and the display shows 39Km, and you want to know the ratio of the remaining trip to the total trip, you need to calculate 39/177. In addition, if you want to know the direction of your current location relative to the reference direction, rotate half a circle around the 125° display.
We must calculate the ratio 12/180 from 180°. In this way, calculation work while the vehicle is running may become troublesome.

The present invention has been made in view of such problems, and includes a display element row in which a plurality of display elements are arranged in a line, and a display element group in which a plurality of display elements are arranged in a circular shape, and the display element The columns are lit up in accordance with the straight-line distance to the destination point, and the display elements are lit up in accordance with the direction of the destination point of the display element group, and the display element column is arranged in the center of the display element group. To provide a vehicle travel guidance device which is arranged in the vertical direction to accurately and easily display the direction of a destination point and the distance to the destination point relative to the traveling direction of the vehicle at the current point.

FIG. 3 is a front view showing a schematic structure of a display device according to the present invention, in which a display element row in which a plurality of display elements 16 ₁ to 16 _o are vertically arranged in a row, and another plurality of display elements 17 are shown. ₁ to 17 _o as display element 16 ₁ to 16 _o
It consists of a group of display elements arranged in a circle around this so that it is located at the center. And the display element 16 ₁ ~
The distance from the current point to the destination point is displayed depending on the number of lit display elements 16 _o , and the direction of the destination point relative to the direction of the vehicle at the current point is displayed depending on the lighting of any of the display elements 17 ₁ to 17 _o . is now displayed. Furthermore, such a display device is connected to a display circuit shown in FIG. In the figure, 18 is an input terminal connected to the output side of the above-mentioned arithmetic unit 13;
9 is the reference voltage input terminal, and this input terminal 1
Voltage dividing resistors 20 ₁ to 20 _o are connected in series to 9 to set different reference potentials, and a voltage is applied to the connection midpoint of these voltage dividing resistors 20 ₁ to 20 _o and the input terminal 18. Comparator 21 that receives voltage as input
₁ to 21 _o are connected. 22 ₁ to 22 _o-1 are the two adjacent comparators 21 ₁ and 21 ₂ , 2
1 ₂ and 21 ₃ , 21 ₃ and 21 ₄ ... are AND gates that receive one output of 21 _o-1 and 21 _o and the negative output of the other, respectively, and the comparator 21 ₁ and these AND gates 21 The display elements 17 ₁ to 17 _o of the display element group are sequentially connected to the output side of the display elements ₁ to 21 _o . Further, 23 is an input terminal connected to the output side of the arithmetic unit 12, which includes the light emitting element 1.
A computing unit 24 for lighting up 6 ₁ to 16 _o is connected. This arithmetic unit includes the display elements 16 ₁ to 16
16 Decoder 25 for selecting _o and lighting it
is connected. 27 is a setting device for setting the distance per display element, and the value obtained by dividing this distance L ₀ by several meters of all display elements 16 ₁ to 16 _o at full scale is the distance per display element. represent Note that this is displayed on the display 28,
The value can now be confirmed.

In the display device having such a configuration, the direction display signal applied to the input terminal 18 is transmitted to the comparator 21.
A voltage obtained by dividing the reference voltage applied to the input terminal 19 at a predetermined ratio is applied to each of the input terminals ₁ to 21 _{o ,} and is applied to the other input terminals _. For example, when the voltage levels applied to both input terminals match, the output signal is inputted to one input side of the first AND gate 22 ₁ , for example. At this time
The other input of the AND gate 22 ₁ is the comparator 21 ₁
No output signal is output, the negative output is inverted, the AND gate 22 ₁ is opened, and the display element 17 ₂ of the circular display element group specifying the direction instruction is lit.

On the other hand, distance data L is input to the input terminal 23, and how many times this distance corresponds to the distance L ₀ /m per light emitting element set by the setting device 27?
That is, L/(L ₀ /m) is calculated by the calculator 24,
Data corresponding to the multiple thereof is supplied to the decoder 25, and, for example, four display elements 16 ₁ to 16 ₄ are turned on. In this way, by selectively lighting up the display elements 17 ₁ to 17 _o , the display element array is located at the center of the circular display element group to indicate the longitudinal direction of the vehicle. The direction of the destination point relative to the direction can be intuitively seen, and the display elements 16 ₁ to
By selectively lighting 16 _o , it is possible to intuitively see the remaining distance from the current point to the destination or the ratio of the distance from the starting point to the current point to the entire journey.

As explained above, the present invention includes a setting device for setting a starting point and a destination point, a sensor for detecting the direction of a vehicle with respect to a reference direction, a distance sensor for detecting the traveling distance of the vehicle, and a setter for setting a starting point and a destination point. a calculation unit that calculates the current location based on the detection data of the sensor and the distance sensor, and calculates the straight-line distance from the current location to the destination point and the direction of the destination point relative to the vehicle at the current location; and a plurality of displays. It has a display element row in which elements are arranged in a row, and a display element group in which a plurality of display elements are arranged in a circular shape, and the display element row is arranged vertically in the center of the display element group, and A display element is lit in accordance with a ratio of the linear distance to the distance, and the display element group is characterized by having a display section in which a display element is lit in accordance with a calculation output in the direction of the destination point, It has the following effects.

(b) The ratio of the remaining distance from the current point to the destination point to the total distance and the direction of the destination point relative to the direction of the vehicle at the current point can be displayed in a pattern in one place, making it intuitive and easy to recognize. This eliminates calculation work, does not interfere with driving operations, and allows the vehicle to be accurately guided toward the destination point.

(b) A display element row in which a plurality of display elements for displaying distance are arranged vertically in a row is arranged in the center of a display element group in which a plurality of display elements for displaying direction are arranged in a circular shape. and distance can be read at the same time.

(c) Since the row of display elements arranged vertically in the center of the circular display element group indicates the longitudinal direction of the vehicle, it is easy to check the deviation of the direction of the destination with respect to the longitudinal direction of the vehicle. It matches the driver's sense of driving.

[Brief explanation of drawings]

Fig. 1 is a circuit block diagram of a vehicle running calculation device which is the basis of the present invention, Fig. 2 is a diagram explaining the running of the vehicle, and Fig. 3 is a front view schematically showing the running display device of a vehicle according to the present invention. , FIG. 4 is a display circuit diagram thereof as well. 1...Direction sensor, 2...Function generator, 3...
distance sensor, 4, 5... multiplier, 6, 7... integrator, 8, 9... subtractor, 10... setting device, 12,
13... Arithmetic unit, 16 ₁ to 16 _o ... Display element, 1
7 ₁ to 17 _o ...display element, 20 ₁ to 20 _o ... voltage dividing resistor, 21 ₁ to 21 _o ... comparator, 22 _{1 to} 22 _o-1
...AND gate, 24 ... arithmetic unit, 25 ... decoder.

Claims (1)

[Claims] 1. A setting device for setting a starting point and a destination point,
A sensor that detects the direction of the vehicle relative to the reference direction, a distance sensor that detects the distance traveled by the vehicle, and a current location calculated based on the detection data of the sensor that detects the direction of the vehicle and the distance sensor, and from the current location to the destination. A calculation unit that calculates the straight-line distance to the point and the direction of the destination point relative to the vehicle at the current point, a display element row in which a plurality of display elements are arranged in a line, and a display element in which a plurality of display elements are arranged in a circular shape. The display element row is arranged in the vertical direction in the center of the display element group, and the display elements are lit according to the ratio of the straight line distance to the entire stroke, and the display element group is: A vehicle travel guidance device comprising a display section in which a display element lights up in accordance with a calculation output in the direction of the destination point.