JP2870619B2 - GPS receiver - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a GPS receiver which requires setting of an initial receiving point position and time.

[0002]

2. Description of the Related Art A GPS receiver is mounted on a moving body such as a vehicle or a ship. GPS (Global Positioning System)
Is a positioning system that transmits a radio wave from a GPS satellite launched into an orbit around the earth so as to have a predetermined arrangement, and receives the radio wave on the mobile body side to obtain a reception point position. When determining the receiving point position, the GPS receiver determines the current G
A satellite capable of suitably receiving radio waves is selected based on the arrangement of the PS satellites. Of the satellites (visible satellites) located at positions where radio waves can reach the current receiving point position,
It is a satellite that can perform suitable positioning in terms of arrangement.

Therefore, when the GPS receiver is to be started quickly, it is preferable to first give the current position of the mobile unit (reception point position) and the current time. By doing so, the time until the start of positioning is reduced as compared with the case where the search is executed for all the satellites.

FIG. 2 shows a schematic configuration of a conventional GPS receiver. The GPS receiver shown in this figure includes a positioning operation unit 10 and a display unit 12. The positioning calculation unit 10 converts a signal (GPS signal) obtained from a GPS satellite by a receiving unit (not shown) into a GPS signal input terminal 1.
4 and sequentially obtains the receiving point position and time and outputs them to the display 12. The display 12 performs display based on the reception point position and the time, and the user sees the display and controls the moving body or the like.

In this conventional example, an initial information input terminal 16 is used as initial setting means. Positioning calculation unit 10
Indicates the initial receiving point position and time at the initial information input terminal 16.
Through which the initial satellite selection is performed. Therefore, positioning can be started more quickly than when searching is performed for all satellites.

[0006]

However, in such a configuration, the receiving point position and the time must be input as the initial information, and the initial setting operation is troublesome. In order to reduce such inconveniences, a search may be performed for all satellites, but in this case, it takes time until positioning as described above.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and a GPS receiver capable of performing initial settings quickly and easily and obtaining information which can be easily used. The purpose is to provide.

[0008]

In order to achieve the above object, the present invention stores, as initial setting means, a table in which at least a place name, a coordinate value, and a time difference from a reference time (UTC) are associated. A storage unit and a current receiving point position are input as a place name, a coordinate value and a time difference from the reference time are obtained by referring to the table based on the place name, and a selection unit that gives the position calculation unit and a reference time that is obtained by the position calculation unit. A clock that always gives,
Wherein the positioning calculation unit inputs the given coordinate value as the initial receiving point position, and performs the positioning calculation using the reference time as the initial time.

Further , according to the present invention, the table includes a place name, a coordinate,
A table that associates language with the value and time difference from the reference time
Language selected by the selection unit with reference to the table.
Is included in the initial information and given to the positioning operation unit, and the positioning operation unit
It is characterized by generating information expressed in this language.
I do.

In a preferred embodiment , the table includes a place name,
The geodetic system was added in addition to the coordinate value and the time difference from the reference time.
A table, which is selected by the selection unit by referring to the table.
The geodetic system is included in the initial information and given to the positioning operation
Calculation unit performs positioning operation using this geodetic system.
Features.

[0011]

According to the present invention, at the time of initialization, a table on the memory first refers to the place name of the current receiving point position as a key. This table associates at least the place name, the coordinate value, and the time difference from the reference time. Therefore, the coordinate value of the current receiving point position and the time difference from the reference time can be obtained by reference. On the other hand, since the reference time is given to the positioning calculation unit by a clock that operates irrespective of the operation of the GPS receiver, the positioning calculation unit can execute initial satellite selection using information obtained by reference. As a result, the positioning can be started more quickly than in the case of searching all the satellites, and the initial setting operation is simplified by only inputting the place name. Since the table also includes the time difference from the reference time, the accurate reference time obtained from the GPS signal can be easily converted to the local time and displayed.

Further, in the present invention, reference is made to
You can get a language. The positioning calculation unit is displayed in this language.
Generate the represented information. As a result, for example,
In this case, easy-to-read information is obtained.

Further, in claim 2, by reference
In addition, a geodetic system is obtained. The positioning calculation unit is based on this positioning system.
It works. This results in more usable information
Is done.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the drawings. The same components as those in the conventional example shown in FIG. 2 are denoted by the same reference numerals, and description thereof will be omitted.

FIG. 1 shows a GPS according to an embodiment of the present invention.
The configuration of the receiver is shown. This GPS receiver includes a storage unit 18, a selection unit 20,
In this configuration, a place name selection terminal 22 and an uninterruptible clock 24 are provided.

The storage unit 18 stores, as a table, the names of places around the world, the corresponding three-dimensional positions, the time difference of the time from the UTC (Coordinated Universal Time), the geodetic system, and the type of display language. Store. The selection unit 20 inputs a place name via the place name selection terminal 22 at the time of initial setting, and refers to a table on the storage unit 18 using the place name. Selector 2
0 is information obtained by reference, that is, 3 of the point
The dimensional position, the time difference, the geodetic system, and the language are initialized in the positioning calculation unit 10.

On the other hand, the uninterruptible clock 24 used in this embodiment is a clock that keeps measuring time even when the power of the GPS receiver is not turned on. The output is UTC
Is engraved. The positioning operation unit 10 knows the current time (local time) at the reception point position based on the UTC output from the uninterruptible clock 24 and the time difference from the selection unit 20.

Therefore, according to the present embodiment, all the initial setting operations are completed by specifying the place name. Therefore, the operation is extremely simple and easy for the user to understand. Of course, since it is not necessary to search all satellites, positioning can be started early.

Furthermore, since the geodetic system and the display language are initialized, the information output from the positioning operation unit 10 and displayed on the display 12 is information that is more understandable and easy for the user to handle. Thus, usability is also improved.

It is not essential to the present invention whether or not the information obtained by the positioning operation unit 10 is output to the display unit 12.

[0021]

As described above, according to the present invention,
When searching for all satellites because at least a table that associates at least the place name, coordinate values, and time difference from the reference time is referred to by the place name, and the information obtained by reference and the reference time are provided as initial information to the positioning calculation unit. Positioning can be started more quickly than in, and the initial setting operation can be simplified by simply inputting the place name.

Further , according to the present invention, the table
Add language , and according to claim 2 , further add geodetic to the table
Because the system was added, more usable information can be obtained.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a configuration of a GPS receiver according to one embodiment of the present invention.

FIG. 2 is a block diagram showing a configuration of a GPS receiver according to one conventional example.

[Explanation of symbols]

 Reference Signs List 10 positioning calculation unit 12 display 18 storage unit 20 selection unit

Continuation of the front page (56) References JP-A-54-80159 (JP, A) JP-A-57-699 (JP, A) JP-A-62-163987 (JP, A) JP-A-63-250584 (JP, A) , A) JP-A-4-102014 (JP, A) Jpn. 709 (1991-9-1) p. 68−71

Claims (2)

(57) [Claims] 1. A positioning operation unit that selects a GPS satellite to execute a positioning operation to generate information indicating a receiving point position, and an initial state that provides the positioning operation unit with a current receiving point position and time as initial information at an initial setting. A GPS receiver comprising: a storage unit that stores a table in which at least a place name, a coordinate value, a time difference from a reference time (UTC) and a language are associated, and a current reception point position. A selection unit that inputs a place name, obtains a coordinate value, a time difference from a reference time, and a language by referring to a table based on the place name, and provides the reference time to the positioning calculation unit; and a clock that always provides the reference time to the positioning calculation unit. The positioning operation unit inputs the given coordinate value as the initial receiving point position, performs the positioning operation using the given reference time as the initial time, and generates information expressed in the given language. A GPS receiver, characterized by starting a process of performing the following. 2. Selecting a GPS satellite and executing a positioning operation
A positioning calculation unit that generates information indicating the reception point position, and an initial setting
At the fixed time, the current position of the receiving point and the time
And an initial setting means for giving the information as information , the initial setting means includes at least a place name, a coordinate value, and a time from a reference time (UTC).
A record that stores a table that associates differences, languages, and geodetic systems
Enter the storage location and the current location of the receiving point as a place name.
Coordinate values with reference to the table, the time difference from the reference time, language 及
Calculated fine datum, a selecting unit Ru provided to the positioning computation unit includes a clock which gives always a reference at the time of positioning operation unit, a positioning calculation unit, a coordinate value given early and reception point position
And use the given reference time as the initial time
And performs a positioning operation in accordance with the given geodetic system .
Starting a process of generating information expressed in a specified language .