JPH0728404A - Golf cart position display method - Google Patents

Abstract

(57) [Summary] [Object] An object of the present invention is to make it possible to accurately detect the traveling position of the own cart with an inexpensive configuration. [Structure] A start mark M0 embedded in a reference point is coded position data associated with X and Y coordinate values on a display screen of the reference point, and a position display mark M1 embedded in each mark installation point. , ... are coded position data consisting of changes in the X and Y coordinate values of each mark installation point relative to the X and Y coordinate values of the immediately preceding reference point or previous mark installation point, respectively. At least the absolute position of the reference point is stored in the storage unit, and the mark detection means first detects the start mark M0 to display the code of the own cart at the corresponding position on the guide map, and thereafter each position display mark. This is for moving the code of the own cart by the amount of change in the X and Y coordinate values displayed with the code contents of M1, ....

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention
The present invention relates to a position display method for a golf cart, which displays a guide map based on guide map data of each hole stored in a storage unit on a display screen of a display unit and also displays a traveling position on the guide map.

[0002]

2. Description of the Related Art Conventionally, a golf cart equipped with a function of displaying a guide map of each hole is provided on the golf course for the convenience of athletes, and this kind of golf cart interferes with the competition. It runs on the cart road at the end of the hole so that the GPS receiver receives radio waves from the satellite to detect the running position of the cart and guides based on the guide map data for each hole stored in the storage unit. The map is displayed on a display unit such as an LCD, and the detected traveling position of the own cart is displayed on the guide map.

As another method of detecting the traveling position of the own cart, a distance sensor such as a vehicle speed sensor and a direction sensor are used, and the traveling position of the own cart is determined based on the traveling distance from the reference start position and the traveling direction. It is also considered to detect.

[0004]

However, when the traveling position is detected by using the GPS, the GPS receiver to be equipped is expensive, and the radio wave from the satellite cannot be received due to the influence of the mountain shadow and the like. In some cases, the position cannot be detected. On the other hand, when the distance sensor and the azimuth sensor are used, the sensor error becomes large due to the slip of the wheel, the ups and downs of the inclination, etc., and the detection accuracy is poor.

Therefore, the present invention has been made to solve the above-mentioned problems, and an object thereof is to make it possible to detect the traveling position of the own cart with high accuracy by an inexpensive structure.

[0006]

A golf cart position display method according to the present invention is a method of displaying a guide map on a display screen of a display unit which travels on a cart road and which is based on guide map data of each hole stored in a storage unit. While displaying at a predetermined display scale,
A golf cart that displays a traveling position on the guide map, wherein the golf cart is provided with mark detecting means, and the mark installation points are defined at predetermined intervals on the cart road with the start position of each hole as a reference point. X- on the display screen
A Y-coordinate is set, and a start mark obtained by encoding the position data associated with the coordinate value of the reference point in the XY coordinates determined from the display scale with the arrangement pattern of the mark member is embedded in the reference point. In addition, the X and Y coordinate values of each mark installation point with respect to the X and Y coordinate values in the XY coordinates of the reference point that is the point immediately before each mark installation point or the immediately preceding mark installation point, respectively. A position display mark obtained by encoding position data consisting of the respective variation amounts by the arrangement pattern of the mark member is embedded in each of the mark installation points, and the absolute position consisting of at least the latitude and longitude of the reference point is previously stored in the storage unit. The mark detection means stores each of the marks and stores the absolute position of the reference point corresponding to the detected start mark. Is read from the storage unit, the code of the own cart is displayed at the position on the guide map being displayed corresponding to the read absolute position, and the amount of change represented by the code content of each detected position display mark. Only, the code of the own cart is moved on the guide map.

[0007]

In the present invention, the start mark embedded in the reference point is the position data mark which is embedded in each mark installation point, in which the position data associated with the X and Y coordinate values of the reference point is coded. Is coded position data consisting of changes in the X and Y coordinate values of each mark installation point with respect to the X and Y coordinate values of the immediately preceding reference point or the immediately preceding mark installation point, respectively. Only the absolute position of the reference point is stored in the table, and the mark detection means first detects the start mark and displays the code of the own cart at the corresponding position on the guide map, and thereafter the code content of each position display mark. Since the code of the own cart is moved by the amount of change in the X and Y coordinate values displayed by, the number of bits for encoding is smaller than when encoding the absolute coordinates of each mark installation point. It is possible to perform display of accurate travel position with an accuracy corresponding to the display scale of the inner map.

[0008]

1 to 3 are flowcharts for explaining the operation of an embodiment of the present invention, FIG. 4 is a block diagram of a golf cart, and FIGS. 5 to 8 are operation explanatory views.

First, the structure of the golf cart will be described. As shown in FIG. 4, an input unit 1 including a keyboard and a storage unit 2 including an IC card storing guide map data for each hole and other data. And this storage unit 2
In addition to the guide map of each hole based on the guide map data read from the display unit 3 including an LCD for displaying the traveling position of the own cart, necessary information, etc., and a control unit described later by detecting the traveling distance. A distance sensor 4 including a vehicle speed sensor that outputs a distance detection pulse, a ferrite detection sensor 5 as mark detection means that detects a ferrite body described later and outputs a ferrite detection signal to a control section, and a control section that controls each section. A golf cart G is constituted by 6 and 6.

By the way, on the actual cart road, as shown in the guide map of FIG. 8 displayed on the display screen of the display unit 3 at a predetermined display scale, 5 m from the reference point P0 corresponding to the start position of this hole. Mark installation points P at specified intervals such as
1, P2, ... Are determined, at this time, the display scale of the guide map is known, and these actual points are easily associated with the respective points on the XY coordinates set on the display screen. The X and Y coordinate values of each point P0, P1, ... Can be easily obtained.

Then, the start mark M0 obtained by coding the position data related to the X and Y coordinate values of the reference point P0 on the display screen by the arrangement pattern of the ferrite body as the mark member is the reference point P0. And the X and Y coordinate values of the points on the display screen of the respective mark installation points P1, ... Are derived, and these mark installation points P1 ,.
The point immediately before each of them, that is, the reference point P0 at the mark installation point P1, the other mark installation points P2, ... At the X and Y coordinate values of the immediately preceding mark installation points P1 ,. , Which are obtained by coding the position data consisting of the respective amounts of change of the Y coordinate values by the arrangement pattern of the ferrite body, are embedded in the respective mark installation points P1, P2 ,.

Further, each mark is composed of a 10-bit code as shown in FIG. 5, for example, a bit a indicating the existence of the mark and a bit b indicating whether the mark is a start mark in order from the traveling direction of the cart shown by the arrow. Three bits c1, c2, c3 regarding the Y coordinate, a bit d indicating the sign of ± of the Y coordinate, and three bits e1, e2 regarding the X coordinate.
It is composed of e3 and a bit f indicating the sign of ± of the X coordinate.

At this time, when the content of the bit a is "1", the mark is present, when it is "0", the mark is not present, and when the content of the bit b is "1", it is a start mark.
When it is "0", it indicates that it is not a start mark, and when the contents of the bits d and f are "1", a minus sign,
When it is "0", it indicates a plus.

The reference point P0 and each mark installation point P
The absolute position (latitude, longitude) of 1, ... Is known by surveying, etc., but if the latitude and longitude of all these points are coded as absolute position data and represented by each mark, the number of bits will be extremely small. Therefore, the latitude and longitude of the reference point P0 are stored in advance in the storage unit 2 as the only absolute position data.

In the sense that the reference point P0 is used as a reference for each mark installation point P1, ..., Code contents representing "0" as X and Y coordinate values are assigned to the start mark M0, that is, the X coordinate value. Since the code content of is represented by the bits e1, e2, e3, and f including the code, the code content in this case is "0000", and the same applies to the Y coordinate value, and the X and Y coordinate values of the start mark M0 are the same. Are also stored in the storage unit 2 at the same time.

On the other hand, for each mark installation point P1, ..., X, Y in the XY coordinates on the display screen of these points,
Since the Y coordinate value is known from the absolute position of each of these points, the display scale, etc., the amount of change in the X, Y coordinate value of each mark installation point P1, ... With respect to the X, Y coordinate value of the point immediately preceding each of these points. Is assigned to each position display mark M1, ... For example, in the case of the first mark installation point P1, the reference point P0 is the immediately preceding point, and the coordinates of this reference point P0 are, for example, (2,2). ) And the coordinates of the mark installation point P1 are (3, 3), the change amounts of the X and Y coordinate values are both "1", and the code content "1000" indicating the change amount including the signs is It is assigned to the first position display mark M1.

Further, in the case of the second mark installation point P2, the first mark installation point P1 is the previous point, and if the coordinates of this mark installation point 2 are (6, 4), then the previous point is set. The amount of change in X and Y coordinates from
It becomes "1", and the code contents "1100" and "1000" indicating the change amount including the sign are assigned to the second position display mark M2.

Further, in the case of the third mark installation point P3, the second mark installation point P2 is the immediately preceding point, and if the coordinates of this mark installation point P3 are, for example, '(7,3),
The change amounts of the X and Y coordinate values from the immediately preceding point are "1" and "-1", respectively, and the code contents "1000" and "1001" indicating the change amounts including the signs are displayed at the third position. The same applies to the subsequent position display marks assigned to the mark M3.

Therefore, by not arranging the ferrite body F at the position corresponding to the bit content "0", but arranging the ferrite body F only at the position corresponding to the bit content "1", the start marks M0,1 When the third position display marks M1 to M3 are formed, the start mark M0 is formed as shown in FIG.
As shown in (a), "1100" in order from the traveling direction of the arrow.
000000 ", and the position display marks M1 to M3 are respectively" 1010001000 "and" 101000 "from the traveling direction of the arrow as shown in FIGS.
1100 "and" 101001000 ", and the same applies to other position display marks.

Then, as shown in FIG. 7, the golf cart G runs on the cart road in the direction of the arrow, and the ferrite detection sensor 5 causes the start mark M0 and each position display mark M.
1, ... When sequentially detected, the position data of the start mark detected by the control unit 6 is read from the storage unit 2, and the traveling position of the own cart is set at a position on the display screen based on the read position data. Is displayed over the guide map.

At this time, if the position data of the reference point P0 corresponding to the start mark M0 is known by detecting the start mark M0, it is possible to know where on the guide map displayed on the display unit 3 the own cart should be displayed. , The current position of the own cart can be accurately displayed at the position on the guide map corresponding to the actual reference point P0, while the change amount of the relative coordinates, which is the position data of each position display mark, is the XY coordinate on the display screen. Since it is the amount of change itself, the code indicating the own cart may be moved on the display screen in accordance with this amount of change.

Next, the overall flow of the position detecting operation will be described with reference to the flowchart of FIG.

First, the control unit 6 reads the output of the ferrite detection sensor 5 (step S1) and determines whether or not a mark is detected (step S2). If the determination result is NO, step S1. If the determination result is YES, the mark detection flag is set because the mark detection is started (step S3),
The pulse counter that counts the number of pulses of the vehicle speed sensor that is the distance sensor 4 is cleared (step S4), and the distance sensor pulse interrupt processing is permitted (step S4).
5), the interrupt processing described in detail later is performed.

Then, when the interrupt processing is completed, it is judged whether or not the mark detection flag is cleared (step S6). If the judgment result is NO, this judgment is repeated until the judgment result becomes YES. On the other hand, if the determination result is YES, the distance sensor pulse interrupt process is not permitted (step S7), and the code content of the mark detected by the ferrite detection sensor 5 is the control unit 6
(Step S8), and then step S1 again.
Then, the operation described above is repeated.

Next, the distance sensor pulse interruption process will be described with reference to the flowchart of FIG.

Now, when the interrupt processing is permitted and the interrupt processing is started, the above-mentioned pulse counter is incremented (step T1) and it is judged whether the pulse count value is "10" or more (step T).
2).

At this time, the pulse count value is "10".
Indicates the number of pulses output from the distance sensor 4 during the time the cart runs on each mark and the ferrite detection sensor 5 detects the first bit to the last bit of the mark. As an example, “10” is set.

If the determination result in step T2 of FIG. 2 is NO, it is determined that the mark detection is not completed, the output of the ferrite detection sensor 4 is read by the control unit 6 (step T3), and the pulse is output. After the count value of the counter and the output value of the detection sensor 5 are stored in the memory or the like (step T4), the process returns to interrupt start again.

On the other hand, if the decision result in the above step T2 is YES, it is determined that the mark detection is completed, and the mark detection flag is cleared (step T5).
To step S6.

Next, the processing relating to the display of the position of the own cart will be described with reference to the flowchart of FIG.

First, it is judged whether or not the code content of the detected mark has been rewritten to the code content of the next mark (step U1). If the result of this judgment is NO, the routine returns to START, and the result of the judgment is YES. If so, the code content of the next new mark is read (step U2),
It is judged from the code contents whether the mark is the start mark M0 or not (step U3).

Then, the determination result of step U3 is YES.
If so, it is determined that the detected mark is the start mark M0, and instead of the guide map of the previous hole, the guide map data of the next hole is read from the storage unit 2 and the guide map is displayed (step U4) The position data of the reference point P0 which is the start position of this hole is read from the storage unit 2, and the mark of the own cart is displayed at the position on the display screen based on the read position data (step U5), return to the start.

On the other hand, if the decision result in the step U3 is NO, it is decided that the detected mark is not the start mark M0 but the position indicating marks M1, ... And the code contents of this mark correspond to this mark. After the change amount of the coordinate value from the point immediately before the mark installation point is derived, the mark represented by the own cart is moved by the derived change amount on the display screen, and the display of the current position of the own cart is updated ( Step U6) and return to the start.

Therefore, the absolute position (latitude, longitude) of the reference point P0 is stored in the storage unit 2, and each mark installation point P1,
As the position display marks M1, embedded in ..., By setting the ferrite body F in a pattern that encodes the amount of change in the coordinate values on the XY coordinates on the display screen from the immediately preceding point, each mark installation point Compared to the case of encoding the absolute coordinates of, the number of bits for encoding is smaller, and the start mark is detected and the code of the own cart is displayed at the corresponding start position on the displayed guide map. After that, X, Y represented by the code contents of each position display mark
It suffices to move by the amount of change in the coordinate value, and the traveling position of the own cart can be displayed accurately with accuracy according to the display scale of the guide map.

Further, only the absolute position of the reference point P0 and the X and Y coordinate values need be stored in the storage section 2, and the data storage efficiency can be improved.

As another embodiment, two ferrite detection sensors are arranged in parallel, the bit pattern of each mark shown in FIG. 5 is divided into two rows as shown in FIG. 9, and one row is indicated by an arrow. Bit a indicating the presence of a mark and three bits c1, c2, and c related to the Y coordinate in order from the traveling direction of the cart
3, a bit d indicating the sign of the Y coordinate is arrayed, and in the other column, in the order from the traveling direction of the cart indicated by the arrow, a bit b indicating whether it is a start mark, three bits e1, e2, e3 regarding the X coordinate, Bits f indicating the sign of the X coordinate may be arranged, and both bit strings may be detected by both ferrite detection sensors to identify the bit contents, and the same effect as the above-described embodiment can be obtained.

In the above embodiment, the ferrite member F is used as the mark member, but the present invention is not limited to this, and the mark detecting means is not limited to the ferrite detecting sensor.

[0038]

As described above, according to the position display method of the golf cart of the present invention, it becomes impossible to detect the traveling position as in the case of using the GPS, the distance sensor and the direction sensor as in the conventional case. In addition, it is possible to prevent the detection accuracy from deteriorating due to wheel slippage and tilt up / down, and it is also possible to prevent the change of the coordinate value in the XY coordinates on the display screen from the point immediately before each mark installation point. Since each position correction mark is embedded by arranging the mark members in a pattern that encodes the amount, the number of bits required for encoding is less than when encoding the absolute coordinates of each mark installation point. Data storage efficiency because the position of the own cart can be displayed accurately with the accuracy according to the display scale of the displayed guide map, and at least the absolute position of the reference point is stored in the storage unit. It can be improved.

[Brief description of drawings]

FIG. 1 is a flowchart for explaining the operation of an embodiment of a golf cart position display method of the present invention.

FIG. 2 is a flowchart for explaining the operation of one embodiment.

FIG. 3 is a flowchart for explaining the operation of one embodiment.

FIG. 4 is a block diagram of a golf cart applied to the present invention.

FIG. 5 is an operation explanatory diagram of the embodiment.

FIG. 6 is a diagram illustrating the operation of the embodiment.

FIG. 7 is a diagram illustrating the operation of the embodiment.

FIG. 8 is a diagram illustrating the operation of the embodiment.

FIG. 9 is an operation explanatory diagram of another embodiment.

[Explanation of symbols]

 G golf cart 2 storage unit 3 display unit 5 ferrite detection sensor 6 control unit M0 start mark M1 to M3 position correction mark F ferrite body P0 reference point P1 to P2 mark installation point

Claims (1)

[Claims] 1. A car traveling on a cart road, displaying a guide map based on guide map data of each hole stored in a storage unit on a display screen of the display unit at a predetermined display scale, and a traveling position on the guide map. A mark detecting means is provided on the golf cart, mark setting points are set at predetermined intervals on the cart road with reference to the start position of each hole, and XY marks are displayed on the display screen. Coordinates are set, and a start mark obtained by encoding position data associated with the coordinate value of the reference point in the XY coordinates determined from the display scale with the arrangement pattern of the mark member is embedded in the reference point. At the same time, X, Y in the XY coordinates of the reference point which is the point immediately before each of the mark installation points or the immediately preceding mark installation point.
A position display mark, which is obtained by coding position data consisting of the amount of change in each of the X and Y coordinate values of each mark installation point with respect to each coordinate value by the arrangement pattern of the mark member, is embedded in each mark installation point, and at least the reference The absolute position consisting of the latitude and longitude of the point is stored in advance in the storage unit, each mark is detected by the mark detecting means, and the absolute position of the reference point corresponding to the detected start mark is stored in the storage unit. The map of the own cart is displayed at the position on the guide map being displayed corresponding to the absolute position read out, and the guide map is displayed by the amount of change represented by the code content of each position display mark detected. A method of displaying the position of a golf cart, characterized in that the code of the own cart is moved above.