CN102455187A

CN102455187A - Precision guiding device based on difference GPS technology

Info

Publication number: CN102455187A
Application number: CN2010105151334A
Authority: CN
Inventors: 何兵
Original assignee: SHANGHAI FULAI INFORMATION TECHNOLOGY Co Ltd
Current assignee: SHANGHAI FULAI INFORMATION TECHNOLOGY Co Ltd
Priority date: 2010-10-21
Filing date: 2010-10-21
Publication date: 2012-05-16

Abstract

The invention provides a precision device based on a difference GPS technology. By the utilization of the difference GPS technology, the device for real-time precision positioning is used to carry out real-time interpretation and route alert for tourists. The guiding device is composed of a GPS antenna, a difference GPS receiver, a processor, a memory and an input/output device. Three-dimensional maps or tour guide speeches of a scenic spot or a museum is stored in the memory. When a tourist holds the guiding device in a scenic spot or a museum, the GPS receiver receives the position information of the tourist through the GPS antenna at real time. Then the information is contrasted with the three dimensional maps in the memory to determine which district the tourist is at. Therefore, an appropriate tour guide speech is selected.

Description

A kind of accurate guide to visitors device based on the differential GPS technology

Technical field:

The invention belongs to automatic guide to visitors field, be specifically related to a kind of accurate guide to visitors device based on the differential GPS technology.

Background technology:

When the Along with people's living standard improved, people often also had higher requirement to quality of the life.When people go sightseeing in each sight spot, museum etc., often need perfect explanation and careful guide obtains more comprehensively to experience.In the prior art, instructions, handbook, inscription that the visitor is perhaps provided at the sight spot by the guide wait and guide, and these comments are nearer from the sight spot usually.Yet when a large amount of people hoped to watch simultaneously the article/works or independent at sight spot to watch article/works by different way, prior art was difficult to provide method flexibly.The appearance of intelligence Audio Guide has solved this problem to a certain extent, but often because the location is accurate inadequately, adjacent signal interference and the indefinite deficiency of guide to visitors route occur.

GPS (GPS, English Global Positioning System) is a kind of 98% zone covering the whole world, can realize pinpoint system.The bearing accuracy that present single gps system provides is to be superior to 25 meters; And be to obtain higher bearing accuracy; We adopt the differential GPS technology usually: a GPS receiver is placed on the base station observes; According to the known precision coordinate of base station, calculate the layback number of base station, and in real time these data are sent by base station to satellite.Receiver user also receives the correction that base station sends, and its positioning result is corrected when carrying out GPS observation, thereby improves bearing accuracy.

The information mode of sending according to the differential GPS base station can be divided three classes the differential GPS location, that is: differential position, pseudo range difference, phase difference.The principle of work of these 3 types of differential modes is identical, promptly all is to send correction by base station, is received and its measurement result is corrected by subscriber station, to obtain the accurate localization result.Different is, the particular content that sends correction is different, and its difference bearing accuracy is also different.

1 differential position

This is the simplest a kind of difference method, and this differential system can reequiped and form to any GPS receiver all.Just can carry out three-dimensional localization after being installed in 4 satellites of GPS receiver observation on the base station, calculate the coordinate of base station.Owing to exist orbit error, clocking error, SA influence, atmospheric effect, multipath effect and other errors, the coordinate that calculates and the known coordinate of base station are different, have error.Base station utilizes data chainning that this correction is sent, and is received by subscriber station, and the subscriber station coordinate that it resolves is corrected, and improves bearing accuracy.Above condition precedent is the situation that base station and subscriber station are observed same group of satellite.The alternate position spike point-score be applicable to user and benchmark distance between sites at 100km with interior situation.

2 pseudo range differences

This is to use the widest a kind of difference.On base station, observe all satellites, according to the coordinate of base station known coordinate and each satellite, obtain every satellite each the time be carved into the actual distance of base station.Compare with the pseudorange that records again, draw the pseudorange correction, transmit it to receiver user, improve bearing accuracy.This difference can obtain the bearing accuracy of meter level.

3 carrier phase difference

Carrier phase difference technology is claimed RTK (Real Time Kinematic) technology again, is the difference method of handling the observed quantity of two survey station carrier phases in real time.Promptly be that the carrier phase of base station collection is issued receiver user, ask difference to resolve coordinate.The carrier phase difference can make bearing accuracy reach centimetre-sized.Be widely used in the field that dynamically needs high precision position.

Summary of the invention:

In order to solve deficiencies such as signal is interfering with each other in the existing guide system, the guide to visitors route is fixing; The invention provides a kind of accurate guide to visitors device based on the differential GPS technology; This device utilizes accurately locating in real time of differential GPS technology, and the visitor is explained orally and the route prompting in real time.

The present invention in order to realize the technical scheme that above-mentioned technical purpose adopts is: this guide to visitors device is made up of gps antenna, differential GPS receiver, processor, storer, input-output apparatus, has wherein stored the three-dimensional map and the tour guide speech of scenic spot or museum in the storer.

When hand-held this guide to visitors device of visitor at the scenic spot or during museum's visit, gps receiver receives visitor's positional information in real time through gps antenna, with the comparison of the three-dimensional map in the storer, confirm which zone the visitor is in, and then select suitable tour guide speech then.

Description of drawings:

Fig. 1 is a kind of composition structural representation based on the technological accurate guide to visitors device of differential GPS according to the invention;

Fig. 2 is a kind of workflow synoptic diagram based on the technological accurate guide to visitors device of differential GPS according to the invention.

1.GPS antenna among the figure, 2. differential GPS receiver, 3. processor, 4. storer, 5. input equipment, 6. output device.

Embodiment:

Below in conjunction with accompanying drawing the present invention is done further explanation.

Among Fig. 1, guide to visitors device according to the invention comprises gps antenna (1), differential GPS receiver (2), and processor (3), storer (4), input equipment (5), these six parts of output device (6) are formed.In having large-scale scenic spot, the bearing accuracy of GPS reaches meter level and gets final product, therefore in this case differential GPS receiver (2) more preferably be selected as the pseudo range difference gps receiver; In the less museum in space, the GPS location needs higher precision, therefore in this case gps receiver (2) more preferably be selected as carrier phase difference gps receiver.

Among Fig. 2, the workflow of guide to visitors device according to the invention is following:

A. initial alignment is carried out in system start-up;

B. processor is inquired about the positional information of self-differential GPS device and from the cartographic information of storer, is drawn visitor's present located visit position;

C. the tour guide speech setting in the processor consults memory is selected tour guide speech according to the visitor present position;

D. the guide to visitors device is play tour guide speech;

E. the processor time-delay was inquired about the visitor present position in 1 second again, judged whether the visitor walks out the affiliated visit scope of current guide to visitors speech;

F. the tour guide speech of selecting continuation to play former tour guide speech or more renew according to judged result.

More than be to explanation of the present invention and non-limiting, based on other embodiments of inventive concept, all within protection scope of the present invention.

Claims

1. accurate guide to visitors device based on differential GPS technology, it is achieved in that and it is characterized in that said guide to visitors device is made up of gps antenna, differential GPS receiver, processor, storer, input equipment, output device.

2. a kind of accurate guide to visitors device based on the differential GPS technology according to claim 1 is characterized in that said differential GPS receiver is the pseudo range difference gps receiver.

3. a kind of accurate guide to visitors device based on the differential GPS technology according to claim 1 is characterized in that said differential GPS receiver is a carrier phase difference gps receiver.

4. a kind of accurate guide to visitors device based on the differential GPS technology according to claim 1 is characterized in that its workflow is following:

A) initial alignment is carried out in system start-up;

B) processor is inquired about the positional information of self-differential GPS device and from the cartographic information of storer, is drawn visitor's present located visit position;

C) the tour guide speech setting in the processor consults memory is selected tour guide speech according to the visitor present position;

D) the guide to visitors device is play tour guide speech;

E) the processor time-delay was inquired about the visitor present position in 1 second again, judged whether the visitor walks out the affiliated visit scope of current guide to visitors speech;

F) tour guide speech of selecting continuation to play former tour guide speech or more renew according to judged result.