CN203616481U - GPS Ethernet interface data demultiplexer - Google Patents

Abstract

The utility model provides a GPS Ethernet interface data demultiplexer, which comprises a GPS antenna, a GPS module connected to the GPS antenna and a GPS data processing module connected to the GPS module, wherein, the GPS antenna is used to receive a GPS radiofrequency signal; the GPS module decodes the received GPS radiofrequency signal and outputs decoding information; the GPS data processing module layouts and seals the decoding information, and performs real time data interaction with external terminal apparatus through the Ethernet interface. Thanks to the GPS Ethernet interface data demultiplexer provided by the utility model, each terminal apparatus can share the GPS system, therefore, expenditure on the GPS system is saved, and economic benefit is raised.

Description

GPS Ethernet interface data shunt

Technical field

The utility model relates to location systems art field, particularly a kind of GPS Ethernet interface data shunt.

Background technology

From the nineties in 20th century, gps system (Global Positioning System, GPS) open for free to the whole world since, be widely used in the field of navigation, traffic, geodetic surveying, precision time service etc. and position, speed, time correlation.Can say, gps system is most advanced, most widely used satellite navigation and location system at present, has extraordinary market outlook.

A GPS group of stars is made up of 24 or more artificial satellites, and they lay respectively in 6 orbit planes, are highly approximately 12550 miles.These artificial satellites are undertaken synchronously by spaceborne atomic clock, constantly transmit distance measuring signal, their current time and track dynamic with two frequencies on L-band, these two frequencies are called as respectively L1(1575.42MHz) and L2(1227.6MHz).Civilian GPS only uses L1 wave band conventionally, and exploration needs to use L1 and L2 wave band with military use simultaneously.

Can obtain current latitude, longitude and height by GPS location compute, error (is only used L1 wave band) in 5m, and timing is accurate in 10ns.Gps receiver is separated with information and the time/position of standard format output artificial satellite, and wherein NMEA0183 standard is modal formal definition.The defined statement of these standards has comprised that visible artificial satellite, satellite signal intensity, GPS or UTC time separate and separate position.Manufacturer also can self-defined statement, to export data or the access to oneself gps receiver specific function is provided with the form of customization.

At present, gps system is applied on numerous terminal devices, and usually appears under same applied field point environment, and multiple terminal devices are because data-interface is inconsistent, and the gps system that use is carried separately respectively.Between each terminal device, cannot share gps system, cause the significant wastage of resource.

Utility model content

The purpose of this utility model is to provide a kind of GPS Ethernet interface data shunt, to solve in prior art, between each terminal device, cannot share gps system, causes the problem of resource significant wastage.

For solving the problems of the technologies described above, the utility model provides a kind of GPS Ethernet interface data shunt, described GPS Ethernet interface data shunt comprises: gps antenna, the GPS module being connected with described gps antenna, the gps data processing module being connected with described GPS module, wherein

Described gps antenna is in order to receive GPS radiofrequency signal;

Described GPS module is decoded to the GPS radiofrequency signal receiving, and exports decoded information;

Described gps data processing module is carried out layout and encapsulation as required to decoded information, and it is mutual to carry out real time data by Ethernet interface and exterior terminal equipment.

Optionally, in described GPS Ethernet interface data shunt, described GPS module after the GPS radiofrequency signal receiving is decoded, obtain latitude, longitude, highly, speed, date, time, course and/or satellite condition information.

Optionally, in described GPS Ethernet interface data shunt, the form of the decoded information of described GPS module output is GGA, GLL, GSA, GSV, RMC and/or VTG.

Optionally, in described GPS Ethernet interface data shunt, described GPS module can send according to the request of described gps data processing module the decoded information of customization data form.

Optionally, in described GPS Ethernet interface data shunt, described GPS module can be pressed specified time interval according to the request of described gps data processing module and be sent decoded information.

Optionally, in described GPS Ethernet interface data shunt, described gps data processing module is carried out as required layout and encapsulation to decoded information and is comprised: set information form, content and by TCP form or UDP form encapsulation of data as required.

Optionally, in described GPS Ethernet interface data shunt, described gps data processing module is carried out real time data by Ethernet interface and exterior terminal equipment and is comprised alternately:

Exterior terminal equipment sends gps data request message to gps data processing module;

Gps data processing module is identified request message, if support, sends gps data; If do not support, refusal request.

Optionally, in described GPS Ethernet interface data shunt, in the time adopting UDP encapsulation, described gps data processing module, after gps data of every transmission, is counted, when the counting of resetting after the acknowledge message of receiving exterior terminal equipment; If while reaching certain count value, do not receive yet the acknowledge message of exterior terminal equipment, stop sending gps data.

Optionally, in described GPS Ethernet interface data shunt, the real time data of described gps data processing module and exterior terminal equipment adopts udp protocol or Transmission Control Protocol alternately.

The GPS Ethernet interface data shunt providing by the utility model, each terminal device can share gps system, has saved the spending of gps system, has improved economic benefit.

Accompanying drawing explanation

Fig. 1 is the structural representation of the GPS Ethernet interface data shunt of the utility model embodiment;

Fig. 2 is the business flow processing figure of the GPS Ethernet interface data shunt of the utility model embodiment.

Embodiment

Below in conjunction with the drawings and specific embodiments, the GPS Ethernet interface data shunt the utility model proposes is described in further detail.According to the following describes and claims, advantage of the present utility model and feature will be clearer.It should be noted that, accompanying drawing all adopts very the form of simplifying and all uses non-ratio accurately, only in order to convenient, the object of aid illustration the utility model embodiment lucidly.

Please refer to Fig. 1, it is the structural representation of the GPS Ethernet interface data shunt of the utility model embodiment.As shown in Figure 1, described GPS Ethernet interface data shunt 1 comprises: gps antenna 10, the GPS module 11 being connected with described gps antenna 10, the gps data processing module 12 being connected with described GPS module 11, wherein,

Described gps antenna 10 is in order to receive GPS radiofrequency signal;

Described GPS module 11 is decoded to the GPS radiofrequency signal receiving, and exports decoded information;

Described gps data processing module 12 is carried out layout and encapsulation as required to decoded information, and it is mutual to carry out real time data by Ethernet interface and exterior terminal equipment.

In the present embodiment, described GPS module 11 can be made up of RF radio frequency chip, baseband chip and core codec CPU, to complete the decoding for GPS radiofrequency signal.Concrete, described GPS module 11 is calculated according to the parameter of the multiple satellite transmissions that receive, obtain about latitude, longitude, highly, the decoded information such as speed, date, time, course and/or satellite situation.Then decoded information serial is outputed to gps data processing module 12, its output data are ASCII coding, content comprised latitude, longitude, highly, the decoded information such as speed, date, time, course and/or satellite situation.Output data layout adopts NMEA-0183 communication standard, and common expressions is 6 kinds, comprises GGA, GLL, GSA, GSV, RMC and VTG.

Further, in the present embodiment, described GPS module 11 can send according to the request of described gps data processing module 12 decoded information of customization data form; Described GPS module 11 can also be pressed specified time interval according to the request of described gps data processing module 12 and be sent decoded information.For example, described GPS module 11 sends a certain specific NMEA statement according to the request of described gps data processing module 12 every some milliseconds.Thus, can improve the utilization ratio for gps system.

In the present embodiment, described gps data processing module 12 can adopt the single-chip microcomputer with IP stack, can be according to different application needs, programming Control is from serial data format and the transmission time interval of GPS module 11, and in real time data are reprocessed to processing, i.e. set information form, content and press TCP form or UDP form encapsulation of data as required.

In the present embodiment, it is mutual that described gps data processing module 12 can be carried out real time data by Ethernet interface and exterior terminal equipment, and wherein, described gps data processing module 12 can adopt udp protocol or Transmission Control Protocol alternately with the real time data of exterior terminal equipment.Idiographic flow can be:

In the time that terminal device (being equivalent to client) need to obtain gps data, to gps data processing module, 12(is equivalent to server end) send UDP(or TCP) request message (can designated ends slogan be P1, P1 is the port numbers not used), wherein data field indicates the parameters such as gps data Format Type and transmission time interval;

Gps data processing module 12 is identified gps data Format Type and transmission time interval in request message, judge whether to support, if supported, send after response further designated terminal equipment should at least often be received N gps data and add their confirmation, simultaneously at inner building database, safeguard with the connection status of terminal device etc.; Cannot support if can not identify maybe, refusal request, terminal device can again send request and hold consultation;

Gps data processing module 12 sending after response message (expression accept request and comprise requirement client to receive N gps data after must confirmation parameter), according to the gps data form of request message indication, start to assemble gps data, adopt udp protocol (or Transmission Control Protocol) carry out encapsulation of data, and with specify the time interval send to object terminal device.

At this, if adopt udp protocol, preferred, terminal device often receives that N gps data just adds their confirmation; If employing Transmission Control Protocol, terminal device can not send acknowledge message (the existing affirmation mechanism that connects of Transmission Control Protocol itself).Further, gps data processing module 12, after 1 gps data of every transmission, just can be counted by inner time-out count device, when just being reset after the acknowledge message of receiving terminal device; For example, if in the time that the counting of time-out count device reaches certain count value (4N, N is natural number), do not receive yet acknowledge message, think that terminal device connects to go wrong, stop sending gps data, remove connection status, wait for that terminal device asks again.Thus, can guarantee the reliability that gps data sends.

In the present embodiment, further, also provide the operation flow of GPS Ethernet interface data shunts.Concrete, please refer to Fig. 2, it is the business flow processing figure of the GPS Ethernet interface data shunt of the utility model embodiment.As shown in Figure 2, after GPS Ethernet interface data shunt 1 brings into operation, first obtain GPS radiofrequency signal by gps antenna 10; Then, GPS radiofrequency signal is offered to GPS module 11 and decodes, obtain content and be longitude, latitude, highly, the decoded information of time etc.; Then, decoded information is offered to gps data processing module 12, for the decoded information obtaining, gps data processing module 12 can further propose the requirement such as form, the time interval to GPS module 11, to control output format, the time interval of GPS module 11, also can process restructuring to gps data, obtain the data that terminal device needs, and data after treatment are offered to terminal device by Ethernet, wherein, gps data processing module 12 and terminal device are undertaken by Ethernet addressing before the mode of data interaction, do not repeat them here.

As fully visible, the GPS Ethernet interface data shunt providing by the present embodiment, each terminal device can share gps system, has saved the spending of gps system, has improved economic benefit.

Foregoing description is only the description to the utility model preferred embodiment; the not any restriction to the utility model scope; any change, modification that the those of ordinary skill in the utility model field does according to above-mentioned disclosure, all belong to the protection domain of claims.

Claims (1)

1. a GPS Ethernet interface data shunt, is characterized in that, comprising: gps antenna, the GPS module being connected with described gps antenna, the gps data processing module being connected with described GPS module, wherein,

Described gps antenna is in order to receive GPS radiofrequency signal;

Described GPS module is decoded to the GPS radiofrequency signal receiving, and exports decoded information;

Described gps data processing module is carried out layout and encapsulation as required to decoded information, and it is mutual to carry out real time data by Ethernet interface and exterior terminal equipment.

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