CN203616480U - GPS radiofrequency signal and serial interface data demultiplexer - Google Patents
GPS radiofrequency signal and serial interface data demultiplexer Download PDFInfo
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- CN203616480U CN203616480U CN201320507977.3U CN201320507977U CN203616480U CN 203616480 U CN203616480 U CN 203616480U CN 201320507977 U CN201320507977 U CN 201320507977U CN 203616480 U CN203616480 U CN 203616480U
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Abstract
The utility model provides a GPS radiofrequency signal and serial interface data demultiplexer, which comprises a GPS antenna, a GPS radiofrequency signal shunt module connected to the GPS antenna, a GPS module connected to the GPS antenna, a GPS data processing module connected to the GPS module and a multi-serial port expansion module connected to the GPS data processing module, wherein, the GPS antenna is used to receive a GPS radiofrequency signal; the GPS radiofrequency signal shunt module inputs and outputs the received GPS radiofrequency signal to a plurality of radio frequency interfaces; the GPS module decodes the received GPS radiofrequency signal and outputs decoding information; the GPS data processing module layouts the decoding information based on requirement, and outputs the layout information to the multi-serial port expansion module. Thanks to the GPS radiofrequency signal and serial 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
Technical field
The utility model relates to location systems art field, particularly a kind of GPS radiofrequency signal and serial line 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 radiofrequency signal and serial line 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 radiofrequency signal and serial line interface data shunt, described GPS radiofrequency signal and serial line interface data shunt comprise: gps antenna, the GPS radiofrequency signal shunt module being connected with described gps antenna, the GPS module being connected with described gps antenna, the gps data processing module being connected with described GPS module and the many serial ports expansion module being connected with described gps data processing module, wherein
Described gps antenna is in order to receive GPS radiofrequency signal;
Described GPS radiofrequency signal shunt module is using the GPS radiofrequency signal receiving as input, and outputs to multiple radio frequency interfaces;
Described GPS module is decoded to the GPS radiofrequency signal receiving, and exports decoded information;
Described gps data processing module is carried out layout as required to decoded information, and programmed information is outputed to many serial ports expansion module.
Optionally, in described GPS radiofrequency signal and serial line interface data shunt, described multiple radio frequency interfaces are N-type radio frequency interface, SMA radio frequency interface or BNC radio frequency interface.
Optionally, in described GPS radiofrequency signal and serial line 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 radiofrequency signal and serial line 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 radiofrequency signal and serial line 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 radiofrequency signal and serial line 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 radiofrequency signal and serial line interface data shunt, described gps data processing module is carried out as required layout to decoded information and is comprised: set information form, content and/or baud rate as required.
Optionally, in described GPS radiofrequency signal and serial line interface data shunt, described GPS module is connected with described gps data processing module by TTL serial ports.
Optionally, in described GPS radiofrequency signal and serial line interface data shunt, described gps data processing module is connected with described many serial ports expansion module by DCB interface.
The GPS radiofrequency signal providing by the utility model and serial line interface data shunt, 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 GPS radiofrequency signal of the utility model embodiment and the structural representation of serial line interface data shunt;
Fig. 2 is the GPS radiofrequency signal of the utility model embodiment and the business flow processing figure of serial line interface data shunt.
Embodiment
Below in conjunction with the drawings and specific embodiments, the GPS radiofrequency signal the utility model proposes and serial line interface data shunt are 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 GPS radiofrequency signal of the utility model embodiment and the structural representation of serial line interface data shunt.As shown in Figure 1, described GPS radiofrequency signal and serial line interface data shunt 1 comprise: gps antenna 10, the GPS radiofrequency signal shunt module 11 being connected with described gps antenna 10, the GPS module 12 being connected with described gps antenna 10, the gps data processing module 13 being connected with described GPS module 12 and the many serial ports expansion module 14 being connected with described gps data processing module 13, wherein
Described gps antenna 10 is in order to receive GPS radiofrequency signal;
Described GPS radiofrequency signal shunt module 11 is using the GPS radiofrequency signal receiving as input, and outputs to multiple radio frequency interfaces;
Described GPS module 12 is decoded to the GPS radiofrequency signal receiving, and exports decoded information;
Described gps data processing module 13 is carried out layout as required to decoded information, and programmed information is outputed to many serial ports expansion module 14.
In the present embodiment, described GPS module 12 is connected with described gps data processing module 13 by TTL serial ports; Described gps data processing module 13 is connected with described many serial ports expansion module 14 by DCB interface.
Concrete, described GPS radiofrequency signal shunt module 11 receives GPS radiofrequency signal from gps antenna 10, can receive GPS L1/L2 frequency band signals, bandwidth of operation is 1.1GHz-1.7GHz, and the gps signal receiving is processed, comprise amplification, filtering and direct-current blocking-up, improved thus GPS radiofrequency signal.Then the GPS radiofrequency signal of processing is outputed to multiple prevention at radio-frequency port, for example 2-8 prevention at radio-frequency port, described multiple prevention at radio-frequency port can be N-type radio frequency interfaces, also can be SMA radio frequency interface, BNC radio frequency interface or TNC radio frequency interface etc.Thus, multiple exterior terminal equipment can be connected with described multiple prevention at radio-frequency port, thereby shares GPS radiofrequency signal.
In the present embodiment, described GPS module 12 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 12 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 13, 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 12 can send according to the request of described gps data processing module 13 decoded information of customization data form; Described GPS module 12 can also be pressed specified time interval according to the request of described gps data processing module 13 and be sent decoded information.For example, described GPS module 12 sends a certain specific NMEA statement according to the request of described gps data processing module 13 every some milliseconds.Thus, can improve the utilization ratio for gps system.
In the present embodiment, described gps data processing module 13 can adopt single-chip microcomputer, can be according to different application needs, programming Control is from serial data format and the transmission time interval of GPS module 12, and in real time data are reprocessed to processing, i.e. set information form, content and/or baud rate as required.(can meet NMEA-0183 communication specification according to predefined serial ports configuration parameter, also can self-defining data form), reset after information format, content and/or the baud rate from the decoded information of GPS module 12, send to many serial ports expansion module 14 by DCB interface, then, exterior terminal equipment can by with many serial ports expansion module 14 on serial line interface 01, serial line interface 02 ... or serial line interface N connects, to obtain gps data, thereby realization shares for gps system, has improved resource utilization.
In the present embodiment, many serial ports expansion module 14 is a kind of chips that distribute multiple serial line interfaces to connect for different exterior terminal equipment application, each exterior terminal equipment can communicate by it and gps data processing module 13, and is controlled separately the parameter such as baud rate, data layout of each serial line interface by gps data processing module 13.Many serial ports expansion module 14 has increased the terminal device quantity being connected with serial line interface flexibly, makes multiple terminal devices that need applying GPS system can share a set of gps system.
In the present embodiment, further, also provide the operation flow of GPS radiofrequency signal and serial line interface data shunt.Concrete, please refer to Fig. 2, it is the GPS radiofrequency signal of the utility model embodiment and the business flow processing figure of serial line interface data shunt.As shown in Figure 2, after GPS radiofrequency signal and serial line interface data shunt 1 bring into operation, first obtain GPS radiofrequency signal by gps antenna 10; Then, GPS radiofrequency signal is divided into two-way, and a road offers GPS radio frequency shunt module 11 and carries out signal processing, outputs to prevention at radio-frequency port, and another road offers GPS module 12 and decodes, and obtains the decoded information that content is longitude, latitude etc.; Then, decoded information is offered to gps data processing module 13, for the decoded information obtaining, gps data processing module 13 can further propose the requirement such as form, the time interval to GPS module 12, also can offer many serial ports expansion module 14 according to set output format, also can process restructuring to gps data, obtain the data that terminal device needs, and data after treatment are offered to many serial ports expansion module 14, output to each exterior terminal equipment by many serial ports expansion module 14.
As fully visible, the GPS radiofrequency signal providing by the present embodiment and serial line interface data shunt, 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 (4)
1. a GPS radiofrequency signal and serial line interface data shunt, it is characterized in that, comprise: gps antenna, the GPS radiofrequency signal shunt module being connected with described gps antenna, the GPS module being connected with described gps antenna, the gps data processing module being connected with described GPS module and the many serial ports expansion module being connected with described gps data processing module, wherein
Described gps antenna is in order to receive GPS radiofrequency signal;
Described GPS radiofrequency signal shunt module is using the GPS radiofrequency signal receiving as input, and outputs to multiple radio frequency interfaces;
Described GPS module is decoded to the GPS radiofrequency signal receiving, and exports decoded information;
Described gps data processing module is carried out layout as required to decoded information, and programmed information is outputed to many serial ports expansion module.
2. GPS radiofrequency signal as claimed in claim 1 and serial line interface data shunt, is characterized in that, described multiple radio frequency interfaces are N-type radio frequency interface, SMA radio frequency interface or BNC radio frequency interface.
3. GPS radiofrequency signal as claimed in claim 1 and serial line interface data shunt, is characterized in that, described GPS module is connected with described gps data processing module by TTL serial ports.
4. GPS radiofrequency signal as claimed in claim 1 and serial line interface data shunt, is characterized in that, described gps data processing module is connected with described many serial ports expansion module by DCB interface.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201320507977.3U CN203616480U (en) | 2013-08-19 | 2013-08-19 | GPS radiofrequency signal and serial interface data demultiplexer |
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| CN201320507977.3U CN203616480U (en) | 2013-08-19 | 2013-08-19 | GPS radiofrequency signal and serial interface data demultiplexer |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103454655A (en) * | 2013-08-19 | 2013-12-18 | 电信科学技术第一研究所 | GPS radio-frequency signal and serial interface data shunting device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103454655A (en) * | 2013-08-19 | 2013-12-18 | 电信科学技术第一研究所 | GPS radio-frequency signal and serial interface data shunting device |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140528 Termination date: 20200819 |