JP2001021638A - Gps positioning system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make accurately calculable the position of a GPS positioning device by receiving position information that is transmitted from the GPS positioning device and performing the DGPS correction of the received position information using a DGPS(differential GPS) base station. SOLUTION: A mountain climber 7 carries a GPS positioning device 6 and transmits position information (a) to a DGPS base station 1 constantly. The DGPS base station 1 performs DGPS correction operation by a DPGS correction operation part 4 based on the position information (a) being transmitted from the GPS positioning device 6 to calculate the accurate position of the mountaineer 7. When the mountaineer 7 deviates from a regular route, alarm information (b) is sent from the DGPS base station 1 to the mountaineer 7 or a rescuer can go to the site. Although the DGPS transmission system differs worldwide, the mountain 7 climbe is enough to carry only the single GPS positioning device 6 without being conscious of the difference in the DGPS transmission system by performing the DGPS correction operation at the DGPS base station 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a GPS positioning system that receives a radio wave from a GPS satellite (hereinafter, referred to as "GPS satellite") and measures the position of a receiving point.

[0002]

2. Description of the Related Art In recent years, GPS has been actively used for measuring its own position, moving speed, and moving direction.

[0003] GPS is a positioning system operated and managed by the United States Department of Defense, but originally intended for use in satellite signals transmitted in a frequency band that is open to the public because it is a military system. Position accuracy (SA:
Selective Av-availability).

For this reason, the position measured by the GPS positioning device includes an error of 100 m at the maximum. As a method of removing the error due to the SA, DGPS (Differential
There is positioning by n-tial GPS).

[0005] Positioning by DGPS (hereinafter referred to as "DGPS positioning") means that a GPS receiver is installed at a fixed base station whose exact position is known, and a precise measurement is made between an accurate satellite and a base station measured in advance. The difference between the distance and the distance between the satellite and the base station calculated based on the orbit information received from the GPS satellite is DGPS.
As the error information, a highly accurate positioning is performed by the moving GPS positioning device based on the DGPS error information. DG
By performing PS positioning, the positioning error is reduced to about 10 m or less.

[0006]

However, the above DGPS
In a GPS positioning system based on error information, DGP is usually used.
The above-mentioned DGPS is added to the moving GPS positioning device for performing S positioning.
A DGPS receiver for receiving error information is required, and GP
There was a problem that the S positioning device was increased in size and cost. Also, there are various transmission methods of DGPS error information, such as the RTCM SC-104 method adopted by the United States Coast Guard and the Japan Coast Guard, etc., and the method using FM multiplex broadcasting in Japan. In order to cope with the transmission schemes, DGPS receivers corresponding to the respective transmission schemes are required, and there is a problem that it is complicated.

This GPS positioning system is required to be able to accurately calculate the position of the GPS positioning device and to be able to reduce the size and simplification of the GPS positioning device.

An object of the present invention is to provide a GPS positioning system that can accurately calculate the position of a GPS positioning device and can reduce the size and simplification of the GPS positioning device.

[0009]

To solve the above problems, a GPS positioning system according to the present invention comprises a DGPS base station,
And a GPS positioning device having a wireless transmission unit for transmitting position information as a GPS positioning result to the DGPS base station.
In the S positioning system, the DGPS base station includes a wireless receiving unit that receives position information transmitted from a GPS positioning device, a DGPS correction operation unit that performs DGPS correction on the position information received by the wireless reception unit, and a DGPS correction operation. And a display unit for displaying the corrected position information on the map on the map.

[0010] Thus, a GPS positioning system capable of accurately calculating the position of the GPS positioning device and reducing the size and simplification of the GPS positioning device is obtained.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS GPS according to claim 1 of the present invention
The positioning system is a GPS positioning system including a DGPS base station and a GPS positioning device including a wireless transmission unit that transmits position information as a GPS positioning result to the DGPS base station, wherein the DGPS base station is a GPS positioning device. Wireless receiving unit for receiving the positional information transmitted from the wireless communication unit, a DGPS correction calculating unit for DGPS correcting the positional information received by the wireless receiving unit, and a display unit for displaying the corrected position information in the DGPS correcting calculating unit on a map And

With this configuration, the DGPS base station can execute the position information correction calculation using the position information transmitted from the GPS positioning device.
There is no need to receive GPS error information, and the GPS positioning device can be reduced in size and simplified.

Hereinafter, an embodiment of the present invention will be described with reference to FIG.
This will be described with reference to FIG.

(Embodiment 1) FIG. 1 shows a case where a climber uses a GPS positioning system in a GPS positioning system according to Embodiment 1 of the present invention.
FIG. 2 is an explanatory diagram showing a case in which the user carries a positioning device. FIG. 2 is an explanatory diagram showing a case where a wandering elderly person carries a GPS positioning device in the GPS positioning system according to Embodiment 1 of the present invention. FIG. FIG. 4 is an explanatory diagram showing a case where a GPS positioning device is mounted on a track in the GPS positioning system according to the first embodiment. FIG. 4 is a diagram showing a GP according to the first embodiment of the present invention.
It is explanatory drawing which shows the case where a GPS positioning device is mounted on a vehicle in the S positioning system.

1 to 4, reference numeral 1 denotes a DGPS base station, 2 denotes a first antenna for receiving a radio wave from a GPS satellite (not shown), and 3 denotes a radio wave transmitted from a GPS positioning device 6 described later. The second antenna 4 for receiving is a DGPS for DGPS correcting the position information received by the second antenna 3
The correction calculation unit 5 is a display unit that displays the position information after correction in the DGPS correction calculation unit 4 on a map, and 6 is a wireless transmission unit (not shown) that transmits position information a, which is a GPS positioning result, to the DGPS base station 1. GPS positioning device equipped with an asterisk, 7 is a climber, 8 is a wandering elderly, 9 is a truck, and 10 is a car. In addition, the DGPS correction calculation unit 4 includes a GPS positioning device 6
Radio receiving unit (not shown) for processing a reception signal output from antenna 3 which has received position information a transmitted from
And a wireless transmission unit (not shown) for transmitting the warning information b and the like to the GPS positioning device 6. In addition, the GPS positioning device 6 includes a wireless receiving unit (not shown) that receives the warning information b and the like transmitted from the DGPS base station 1.

In FIG. 1, a climber 7 carries a GPS positioning device 6 and constantly transmits position information a to the DGPS base station 1. In the DGPS base station 1, the DGPS correction operation unit 4 uses the DGPS correction operation unit 4 based on the position information a transmitted from the GPS positioning device 6.
A GPS correction calculation is performed to calculate the exact position of the climber 7, and when the vehicle is away from the regular route, the climber 7 is notified of the DGPS.
The base station 1 can issue the warning information b by radio or go to the site for rescue. Although the DGPS transmission method is different everywhere in the world, by performing the DGPS correction operation in the DGPS base station 1, the climber 7 can recognize the single GPS positioning device 6 without being aware of the difference in the DGPS transmission method.
You only need to carry only one.

Next, a GPS positioning system for the wandering elderly 8 will be described with reference to FIG. Recently, the wandering phenomenon of the elderly with dementia has become a social problem. The small-sized GPS positioning device 6 is carried by such a wandering elderly person 8 and the position information a is constantly transmitted to the DGPS base station 1. DGPS base station 1
Then, the DGPS correction operation unit 4 performs the DGPS correction operation based on the position information a transmitted from the GPS positioning device 6,
An accurate position of the wandering elderly person 8 is calculated. The guardian who searches for the wandering elderly person 8 can obtain the position information a of the wandering elderly person 8 from the DGPS base station 1 and easily find the wandering elderly person 8. Also in this case, by performing the DGPS correction calculation in the DGPS base station 1, the GPS positioning device 6 can be reduced in size and simplified, and the wandering elderly person 8 is not conscious of carrying.

Next, the truck 9 on which the transport container is mounted
The GPS positioning system targeting is described with reference to FIG. The transport container is transported on the carrier of the truck 9, and is moved to another stopover at another stopover. GP that measures the position of such containers
The S positioning device 6 is driven by a battery, and it is required that the device itself be reduced in size and simplified. The DGPS base station 1 calculates the DGPS correction calculation of the position of the container (the position of the track 9).
By doing so, the GPS early device 6 itself can be reduced in size and simplified.

Next, a GPS positioning system for the automobile 10 will be described with reference to FIG. This GPS
The positioning system is a system that transmits the location information a of the site to the DGPS base station 1 when a traffic accident of the vehicle 10 occurs. In order to simplify the miniaturization of the GPS positioning device 6 mounted on the vehicle 10, D in DGPS base station 1
A GPS correction calculation is performed. In a city area or the like, roads are complicated and complicated, so if a position error of 100 m occurs, when displaying the position of the car on the display unit 5, the car may be displayed on a different road from the accident site. By performing the DGPS correction calculation, the position information of the accident site becomes more accurate, but the GPS positioning device 6 side may be small.

As described above, according to the present embodiment, DG
The PS base station 1 and the position information a, which is the GPS positioning result, are D
A GPS positioning system having a GPS positioning device 6 having a wireless transmission unit for transmitting to the GPS base station 1,
The PS base station 1 includes a wireless receiving unit that receives the position information a transmitted from the GPS positioning device 6, a DGPS correction operation unit 4 that performs DGPS correction on the position information received by the wireless receiving unit,
The display unit 5 that displays the corrected position information in the DGPS correction calculation unit 4 on a map is provided, so that the DGPS using the position information a transmitted from the GPS positioning device 6 is performed.
The base station 1 can execute the correction calculation of the position information a, and the GPS positioning device 6 does not need to receive the DGPS error information, so that the accurate position of the GPS positioning device 6 can be calculated and the GPS The size and simplification of the positioning device 6 can be achieved.

[0021]

As described above, the GPS positioning system according to the first aspect of the present invention includes a DGPS base station and a radio transmission unit that transmits position information as a GPS positioning result to the DGPS base station. A GPS positioning system having a GPS positioning device, wherein the DGPS base station is a GPS positioning system.
A wireless receiver for receiving the position information transmitted from the S positioning device, a DGPS correction calculator for DGPS correcting the position information received by the wireless receiver, and a corrected position information displayed on the DGPS correction calculator on a map. And a display unit that performs the correction operation of the position information on the DGPS base station side by using the position information transmitted from the GPS positioning device, and the GPS positioning device needs to receive the DGPS error information. Therefore, there is an advantageous effect that the accurate position of the GPS positioning device can be calculated and the GPS positioning device can be reduced in size and simplified.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing a case where a climber carries a GPS positioning device in a GPS positioning system according to a first embodiment of the present invention;

FIG. 2 is an explanatory diagram showing a case where a wandering elderly person carries a GPS positioning device in the GPS positioning system according to the first embodiment of the present invention;

FIG. 3 is an explanatory diagram showing a case where a GPS positioning device is mounted on a track in the GPS positioning system according to the first embodiment of the present invention;

FIG. 4 is an explanatory diagram showing a case where a GPS positioning device is mounted on an automobile in the GPS positioning system according to the first embodiment of the present invention;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 DGPS base station 2 1st antenna 3 2nd antenna 4 DGPS correction calculation part 5 Display part 6 GPS positioning device 7 Mountaineer 8 Wandering old man 9 Truck 10 Car

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Kumiko Matsuo 1006 Kazuma Kadoma, Kadoma City, Osaka Prefecture F-term (reference) 2F029 AA02 AA07 AB07 AC02 5H180 AA01 AA07 AA21 AA22 BB04 FF05 FF27 5J062 BB01 BB05 CC07 EE04

Claims (1)

[Claims] 1. A GPS positioning system comprising: a DGPS base station; and a GPS positioning device including a wireless transmission unit that transmits position information as a GPS positioning result to the DGPS base station, wherein the DGPS base station comprises: A wireless receiver for receiving position information transmitted from the GPS positioning device, and a DGP for DGPS correcting the position information received by the wireless receiver
A GPS positioning system, comprising: an S-correction calculation unit; and a display unit that displays position information after correction in the DGPS correction calculation unit on a map.