CN110208826A - A kind of digital satellite smart antenna of multimode multi-frequency - Google Patents
A kind of digital satellite smart antenna of multimode multi-frequency Download PDFInfo
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- CN110208826A CN110208826A CN201910454621.XA CN201910454621A CN110208826A CN 110208826 A CN110208826 A CN 110208826A CN 201910454621 A CN201910454621 A CN 201910454621A CN 110208826 A CN110208826 A CN 110208826A
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
- G01S19/01—Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
- G01S19/03—Cooperating elements; Interaction or communication between different cooperating elements or between cooperating elements and receivers
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
- G01S19/01—Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
- G01S19/13—Receivers
- G01S19/14—Receivers specially adapted for specific applications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
- G01S19/38—Determining a navigation solution using signals transmitted by a satellite radio beacon positioning system
- G01S19/39—Determining a navigation solution using signals transmitted by a satellite radio beacon positioning system the satellite radio beacon positioning system transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
- G01S19/40—Correcting position, velocity or attitude
- G01S19/41—Differential correction, e.g. DGPS [differential GPS]
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
- G01S19/38—Determining a navigation solution using signals transmitted by a satellite radio beacon positioning system
- G01S19/39—Determining a navigation solution using signals transmitted by a satellite radio beacon positioning system the satellite radio beacon positioning system transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
- G01S19/42—Determining position
Abstract
The present invention discloses a kind of digital satellite smart antenna of multimode multi-frequency, including satellite antenna module, navigation information resolve module, message processing module and information collection supplementary module；The satellite antenna module is for receiving satellite-signal and logo signal, and constant power is divided into two-way analog signal；The navigation information resolves module and is respectively used to resolve navigator fix information and difference positioning information, and is continuously exported with digital signal form；The message processing module real time execution Differential positioning algorithm, using difference positioning information assisting navigation location information to realize high-precision navigator fix；The information collection supplementary module continuously powers to system, and unified time reference benchmark is provided for signal acquisition.The present invention can under complicated applications environment, poor working conditions accurately, continuously, steadily, reliably provide satellite navigation and positioning information, improve the integrated level and compatibility of system.
Description
Technical field
The present invention relates to a kind of satellite antenna, especially a kind of digital satellite smart antenna of high-precision multimode multi-frequency,
The invention belongs to high-precision satellite navigation positioning technical fields.
Background technique
Satellite navigation and location system is using the navigation satellite in space to ground, the aerial, water surface, underwater, space multiclass
Type, multipurpose carrier provide navigator fix information, mainly include location information, course information, velocity information, posture information and
Temporal information etc..Currently, the satellite navigation and location system of world application includes the GPS satellite navigation system in the U.S., Russia sieve
The galileo satellite navigation system of this GLONASS satellite navigation system, the BDS satellite navigation system of China and Europe.Base
In accurately satellite real time execution location information, satellite navigation system resolves by optimization and provides accurate navigation for carrier
Location information, while continuous, reliable auxiliary information reference can also be provided for other kinds type equipment.Based on this, satellite navigation
Positioning system have navigate round-the-clock, positioning accuracy is high, stable and reliable operation, using the technical advantages such as without geographical restrictions, because
And the various occasions such as be widely used in land, space flight, aviation and navigation and national defense construction, industrial production, national economy are built
If waiting each field.
However, some inevitably asking while being used widely, occurs therewith in satellite navigation and location system
Topic, complicated application environment are to influence the main problem of satellite navigation and location system accuracy, stability and reliability.For upper
For the single satellite navigation and location system stated, complicated operating condition will have a direct impact on its continuity for receiving satellite-signal,
It is easy to appear the case where part signal is lost, especially in the case where the topography environment of poor atmospheric conditions and serious shielding
It is easy to multiple.Under single-frequency single mode operation mode, this also just inevitably substantially reduces the accuracy of navigator fix information, connects
Continuous property and reliability.Moreover, the carrier inside for being equipped with various equipment is flooded with the electromagnetic interference of each frequency range, and then form shadow
Ring the poor working conditions that electronic equipment works normally.External same frequency range electromagnetic interference signal can be added in satellite-signal,
And then the parameters such as the frequency, amplitude, phase of signal is caused to generate unexpected fluctuation, to influence the quality of satellite-signal.
More it should be noted that the data communication protocol that satellite navigation and location system follows mainly includes NMEA0183, NMEA2000
With RTCM agreement.Satellite navigation and positioning data auxiliary is needed to support but do not support setting for above data communications protocol for certain
For standby, the appearance of the problem seriously constrains application of the equipment on carrier, while it is fixed to be greatly reduced satellite navigation
The versatility and compatibility of position system.
Summary of the invention
The object of the present invention is to provide the height that one kind can take into account accuracy, stability, reliability, compatibility and versatility
The digital satellite smart antenna of precision multimode multi-frequency.
A kind of digital satellite smart antenna of multimode multi-frequency of the invention, including satellite antenna module, navigation information resolve
Module, message processing module and information collection supplementary module；
Satellite antenna module receives mixed frequency signal, and mixed frequency signal constant power is divided into the identical signal of two-way and is transferred to and is led
Information of navigating resolves module, includes Satellite Simulation signal and logo analog signal in the signal, mixed frequency signal is defended from GPS
One of star signal, BDS satellite-signal, GLONASS satellite signal and GALILEO satellite-signal are a variety of.
Navigation information resolves module and carries out real-time resolving to Satellite Simulation signal and logo analog signal, and will be after resolving
Satellite navigation and positioning information and difference positioning information carry out digital coding according to fixed communication agreement and are transmitted to information processing mould
Block；
Message processing module parses received satellite navigation and positioning information and difference positioning information, after parsing
Satellite navigation and positioning information and difference positioning information are completed difference using Differential positioning algorithm and are resolved, the information after resolving to difference
It encodes according to the requirement of system output communication protocol and exports in real time, message processing module resolves module publication control to navigation information
System instruction, setting navigation information resolve module and work in predetermined operating mode, control instruction include enabled instruction, halt instruction,
Operating mode configuration-direct, information inquiry instruction；
Information collection supplementary module is satellite antenna module, navigation information resolves module and message processing module is powered and mentioned
It is referred to for real-time clock.
The invention also includes:
Satellite antenna module includes wide frequency antenna circuit and signal power-devided circuit；Wide frequency antenna circuit has conical antenna knot
Structure, wide frequency antenna circuit receive mixed frequency signal and mixed frequency signal are transferred to signal power-devided circuit, and signal power-devided circuit will receive
Mixed frequency signal constant power be divided into the identical signal of two-way, two output ports through power-devided circuit are defeated respectively for the identical signal of two-way
Out.
Signal power-devided circuit is resistor-type signal power-devided circuit, two output port parallel connection adjustable resistances.
It includes satellite-signal solving unit and logo differential signal solving unit that navigation information, which resolves module,；
Satellite-signal solving unit receives the mixed frequency signal all the way of signal power-devided circuit output simultaneously by GNSS board P306
Real-time resolving goes out satellite navigation and positioning information, and satellite navigation and positioning information is carried out digital coding simultaneously according to fixed telecommunication agreement
Via High Speed Serial or Ethernet output to message processing module；
Logo differential signal solving unit receives the another way mixing of signal power-devided circuit output by difference board SBX-4
Signal and real-time resolving go out difference positioning information, and difference positioning information is carried out digital coding according to fixed communication agreement and is led to
High Speed Serial or Ethernet output are crossed to message processing module.
Fixed telecommunication agreement is NMEA0183 agreement, High Speed Serial UART.
Message processing module uses ARM board, and message processing module receives navigation information by High Speed Serial and resolves module
The information of output, message processing module output interface select RS422 form, and message processing module includes based on ADM2582E's
TTL-RS422 conversion circuit, message processing module reserve High Speed Serial and Ethernet as debugging interface.
ARM board is AM3358.
Information collection supplementary module has two kinds of powering modes of DC24V and AC220V；
When selecting AC220V to system power supply, via UPS uninterruptible power supply and filter stability input voltage and filter out
After noise, DC24V is converted to by AD/DC module；DC24V is converted to DC3.3V by DC/DC module, is ARM board, difference board
It powers with GNSS board；DC24V is converted to DC5V by DC/DC module, and DC5V is satellite antenna module by signal power-devided circuit
Power supply, design filter circuit keep DC5V, DC3.3V and DC24V voltage stabilization；
When selecting DC24V to system power supply, DC24V is directly converted to DC3.3V by DC/DC module, is ARM board, difference
Scoreboard card and the power supply of GNSS board；DC24V is directly converted to DC5V by DC/DC module, and DC5V is to defend by signal power-devided circuit
The power supply of star Anneta module, design filter circuit keep DC5V, DC3.3V and DC24V voltage stabilization.
Message processing module includes the real time clock circuit based on DS1302, is navigator fix information and difference positioning information
Timestamp is provided.
Beneficial effects of the present invention: the present invention is based on satellite antenna component, multimode multi-frequency satellite receiver board and difference
Receiver board realizes the accurate target for obtaining navigator fix information；External electromagnetic interference is reduced based on Digital communication circuit
Influence to interaction data accuracy realizes that the customized mechanism of communications protocol promotes the versatility of satellite navigation and location system and simultaneous
Capacitive, guarantee under complicated applications environment, poor working conditions accurately, continuously, steadily, satellite navigation is reliably provided
Location information improves the integrated level and compatibility of system, can efficiently solve the problem of background technique proposes.The present invention can be with
Receive multi-frequency multi-mode Satellite Simulation signal and real-time resolving satellite navigation and positioning information, including GPS satellite signal, BDS satellite letter
Number, GLONASS satellite signal, GALILEO satellite-signal, when observing just continuity variation occur in certain received satellite-signal
The case where when occurring, the observation that the present invention can independently adjust in time satellite signal receiving channel to guarantee Satellite Simulation signal is continuous
Property and stability, avoid reduce navigator fix information accuracy, continuity and reliability.
Detailed description of the invention
Fig. 1 is the principle of the present invention block diagram.
Fig. 2 is the working principle of the invention figure.
Fig. 3 is electrical schematic of the present invention.
Specific embodiment
With reference to the accompanying drawing, the present invention is further explained.It should be understood that these embodiments are merely to illustrate the present invention and do not have to
In limiting the scope of the invention.In addition, it should also be understood that, after reading the content taught by the present invention, those skilled in the art can be with
The present invention is made various changes or modifications, such equivalent forms equally fall within model defined by the application the appended claims
It encloses.
The digital satellite smart antenna of high-precision multimode multi-frequency of the present invention, including satellite antenna module, navigation information resolve
Module, message processing module and information collection supplementary module；The satellite antenna module is for receiving satellite-signal and platform
Signal is marked, and constant power is divided into two-way analog signal；The navigation information resolves module and is respectively used to resolve navigator fix letter
Breath and difference positioning information, and continuously exported with digital signal form；The message processing module real time execution Differential positioning is calculated
Method, using difference positioning information assisting navigation location information to realize high-precision navigator fix；The information collection supplementary module
It continuously powers to system, and unified time reference benchmark is provided for signal acquisition.
As shown in Figure 1, main includes defending the present invention provides a kind of digital satellite smart antenna of high-precision multimode multi-frequency
Star Anneta module, navigation information resolve module, message processing module and information collection supplementary module, the working principle diagram of system
As shown in Figure 2.
(1) satellite antenna module
Satellite antenna module is mainly made of wide frequency antenna circuit and signal power-devided circuit, is mainly used to receive Satellite Simulation
Signal includes satellite positioning information and beacon difference information.As shown in Figure 2 it is found that the output of satellite antenna module is directly connected to
Power-devided circuit input, and the port A and the power-devided circuit output direct output satellite analog signal in the port B are exported via power-devided circuit,
I.e. Satellite Simulation signal resolves and difference positioning information solution after the distribution of power-devided circuit constant power for satellite navigation and positioning information
It calculates and information needed source is provided.
Satellite antenna module is the modular assembly collectively constituted by wide frequency antenna and preamplifier.Wide frequency antenna has
Apparent conical antenna structure, can receive the analog signal (low frequency signal, intermediate-freuqncy signal and high-frequency signal) of full frequency band.Cone
Shape antenna can convert corresponding electric current for extremely weak satellite-signal electromagnetism wave energy, convert after preamplifier amplifies
For Satellite Simulation signal.Received signal be from GPS satellite signal, BDS satellite-signal, GLONASS satellite signal and
One of GALILEO satellite-signal is a variety of.It includes multi-frequency multi-mode satellite-signal and logo signal that wide frequency antenna, which receives,
Analog signal, the signal include satellite navigation and positioning information and difference positioning information.Signal power-devided circuit is directly connected to wideband day
Line circuit output, and the analog signal constant power is divided into the identical two-way analog signal of parameter attribute, wherein including
Satellite navigation and positioning information and difference positioning information.Two-way analog signal is respectively Satellite Simulation signal and logo analog signal,
Then satellite-signal solving unit and logo differential signal solution are transmitted separately to by the coaxial cable Jing Guo good shielding processing
It calculates and completes information resolving in unit.
(2) navigation information resolves module
Navigation information resolves the satellite navigation and positioning information that module is mainly used in resolving Satellite Simulation signal and difference is fixed
Position information.Satellite positioning signal and beacon differential signal in Satellite Simulation signal need to resolve process via specific signal respectively
After get satellite navigation and positioning information and difference positioning information.Based on this, navigation information resolves module and is resolved by satellite-signal
Unit and logo differential signal solving unit composition.
As shown in Fig. 2, the simulation input port of the power-devided circuit output port A connection satellite-signal solving unit, transmission are defended
Star navigator fix information, satellite navigation and positioning information is by GNSS board P306 real-time resolving, and resolved data is from its digital output end
The external interaction data of mouth；Power-devided circuit exports the simulation input port of the port B connection logo differential signal solving unit, and it is poor to transmit
Divide location information, difference positioning information is by difference board SBX-4 real-time resolving, and resolved data is from its digital output port to diplomacy
Mutual data.
A. satellite-signal solving unit
Satellite Simulation signal is directly transferred to satellite-signal solving unit by coaxial cable, in satellite-signal solving unit
Middle completion navigator fix information resolves, and gets location information, velocity information, course information, the temporal information of carrier in real time
Equal navigator fixs information.Then, the navigator fix information that satellite-signal solving unit will acquire is according to scheduled communication protocol
Form is encoded, and passes through High Speed Serial (baud rate >=230400bps) or 10M/100M/1000M with digital signal form
Ethernet realizes high speed information interaction to external equipment.
GNSS board P306 can receive multi-frequency multi-mode Satellite Simulation signal and real-time resolving satellite navigation and positioning information, packet
Include GPS satellite signal, BDS satellite-signal, GLONASS satellite signal, GALILEO satellite-signal.When observing just received
When certain satellite-signal the case where continuity variation occurs and occurs, GNSS board P306 can independently adjust satellite signal receiving frequency in time
Road avoids the accuracy, the continuity that reduce navigator fix information to guarantee the observation stability of Satellite Simulation signal
And reliability.The satellite navigation and positioning signal exported from the power-devided circuit output port A is stablized by coaxial cable and SMA connector
It is connected to GNSS board P306, GNSS board P306 demodulation of satellite navigator fix signal and therefrom real-time resolving satellite navigation and positioning
Information.After satellite navigation and positioning information resolves, GNSS board P306 assists satellite navigation and positioning information according to fixed telecommunication
It discusses (NMEA0183 agreement) and carries out digital coding, and via UARTB (baud rate 230400bps) with Transistor-Transistor Logic level signal post collimation
Output satellite navigator fix information is connect to message processing module.
B. logo differential signal solving unit
Logo analog signal is directly transferred to logo differential signal solving unit by coaxial cable, in logo differential signal
Difference positioning information is completed in solving unit to resolve, and gets relative positioning information of the carrier relative to base station in real time.So
Afterwards, the relative positioning information that logo differential signal solving unit will acquire is encoded according to scheduled communication protocol form,
And outside is set by High Speed Serial (baud rate >=230400bps) or 10M/100M/1000M Ethernet with digital signal form
It is standby to realize high speed information interaction.
The relative positioning information that difference board SBX-4 primary recipient is sent from logo, and according to the absolute position of logo
Come the relative position of positioning carrier.The practical function distance of difference board SBX-4 is determined that logo is distributed by the distributed network of logo
More extensive, Differential positioning network coverage area is bigger, and the practical function distance of Differential positioning is bigger.The end B is exported from power-devided circuit
The logo differential signal of mouth output is stably connected with difference board SBX-4, SBX-4 demodulation by coaxial cable and SMA connector
Logo differential signal and therefrom real-time resolving difference positioning information.After difference information resolves, difference board SBX-4 is by difference
Location information is encoded according to fixed telecommunication agreement (NMEA0183 agreement), and with baud rate 9600bps by UART0 with
Transistor-Transistor Logic level signal standards is sent directly to message processing module.
(3) message processing module
Message processing module is mainly used for resolving based on the Differential positioning of satellite navigation and positioning information and difference positioning information,
According to the specific requirement of predetermined communication protocol by satellite navigation and positioning after the satellite navigation and positioning information for getting higher precision
Information is recompiled and is exported.Message processing module is connected directly to navigation information and resolves module, and the two passes through High Speed Serial (wave
Special rate >=230400bps) or the realization high speed information exchange of 10M/100M/1000M Ethernet.At the same time, message processing module
Module is resolved to navigation information and issues control instruction, setting navigation information resolves module and works in predetermined operating mode, including opens
Dynamic instruction, halt instruction, operating mode configuration-direct, information inquiry instruction etc.；The satellite-signal solution of navigation information resolving module
It calculates unit and sends navigator fix information in real time, the logo differential signal solving unit that navigation information resolves module sends difference in real time
Location information, all information enter directly into message processing module.Based on Differential positioning algorithm, message processing module utilizes difference
Location information auxiliary calculates navigator fix information, to realize high-precision navigation locating function.Meanwhile according to external outputting communication
The specific requirement of specification, message processing module recompile navigator fix information, and to pass through RS422 High Speed Serial (baud rate
>=230400bps) or 10M/100M/1000M Ethernet output.
As shown in Fig. 2, the digital output port of the input port A of message processing module and satellite-signal solving unit connects
It connects, the input port B of message processing module is connect with the digital output port of logo differential signal solving unit, information processing mould
The output port of block externally directly exports the satellite navigation and positioning information after difference resolves.It is poor that ARM board AM3358 is utilized
The accuracy for dividing location information to promote satellite navigation and positioning information, to realize the purpose for promoting navigation and positioning accuracy.ARM board
The UART1 of AM3358 has High Speed Serial attribute, can be with high speed baud rate (baud rate is up to 921600bps) interaction number
According to.ARM board AM3358 is received with Transistor-Transistor Logic level signal standards by difference board SBX-4 by UART1 (baud rate 9600bps)
The Differential positioning data of transmission according to NMEA0183 protocol analysis Differential positioning data and obtain difference positioning information；ARM board
AM3358 is led with the reception of Transistor-Transistor Logic level signal standards by the satellite that GNSS board P306 is sent by UART2 (baud rate 9600bps)
Boat location information, according to NMEA0183 protocol analysis satellite navigation and positioning data and obtains satellite navigation and positioning information.Based on solution
The satellite navigation and positioning information and difference positioning information finished is analysed, ARM board AM3358 is completed in real time using Differential positioning algorithm
Difference resolves.Meanwhile in order to promote the anti-interference ability of the digital satellite smart antenna of high-precision multimode multi-frequency and output distance,
Its output interface selects RS422 form, and designs the TTL-RS422 conversion circuit based on ADM2582E and realize output signal type
Conversion, by High Speed Serial UART4 and UART5 can realize high speed, transmit information at a distance.
At the same time, ARM board AM3358 supports High Speed Serial and Ethernet interface on-line debugging, therefore, reserves high speed
Serial ports UART0 (baud rate 115200bps) and 10M/100M/1000M Ethernet ETH0 connects as the debugging of ARM board AM3358
Mouthful, it can be achieved that plug-in online updating and on-line debugging.
(4) information collection supplementary module
Information collection supplementary module is mainly used for providing the power supply of required voltage class for equipment each in system and provides reality
When clock reference effect, to system power supply guarantee system work stability and reliability, provide real-time clock with reference to guarantee
Acquire the consistency of data.The compatible two kinds of power supply modes of the digital satellite smart antenna of high-precision multimode multi-frequency, i.e. DC24V and
AC220V。
When selecting AC220V to system power supply, via UPS uninterruptible power supply and filter stability input voltage and filter out
After noise, DC24V is converted to by AD/DC modules A YM-60S24；DC/DC module MIWI10-24S033 is converted to DC24V
DC3.3V powers for ARM board AM3358, difference board SBX-4 and GNSS board P306；DC/DC module MIWI10-24S05
DC24V is converted into DC5V, DC5V is satellite antenna module for power supply by signal function sub-module.Meanwhile it designing filter circuit and protecting
Hold DC5V, DC3.3V and DC24V voltage stabilization.
When selecting DC24V to system power supply, DC/DC module MIWI10-24S033 is directly converted to DC24V
DC3.3V powers for ARM board AM3358, difference board SBX-4 and GNSS board P306；DC/DC module MIWI10-24S05
DC24V is directly converted into DC5V, DC5V is satellite antenna module for power supply by signal function sub-module.Meanwhile designing filtered electrical
Road keeps DC5V, DC3.3V and DC24V voltage stabilization.
Based on this, ARM board AM3358, difference board SBX-4 and GNSS board P306 are 3.3V power supply system, string
Row communication interface is all satisfied 3.3V Transistor-Transistor Logic level signal standards, can directly carry out High Speed Serial communication, without designing conversion electricity
Road assists level conversion.Meanwhile difference board SBX-4 and GNSS board P306 is both needed to satellite antenna module for power supply to guarantee to defend
The continuity and reliability of star analog signal.Difference board SBX-4 is DC5V, GNSS plate to the power reguirements of satellite antenna module
Block P306 and DC15V is lower than to the power reguirements of satellite antenna, therefore, difference board SBX-4 and GNSS board P306's defends
Star antenna is used uniformly DC5V power supply.
The input voltage range of all power modules is DC9V~36V, has wide voltage input characteristic, is had preferable
Input voltage compatibility, the actual working environment suitable for voltage larger fluctuation.According to the power supply based on COTS design criteria
System engineering experience, 2 times of rated output powers of rated output power of each voltage module, can effectively avoid because of temperature mistake
It is high and transfer efficiency is caused to reduce and then the inadequate problem of output power, and current spike when starting can be weakened to system
The influence of electrical stability.
Meanwhile the real time clock circuit based on DS1302 is designed, message processing module passes through I2The real-time read access time of C bus
Information, and timestamp is provided by navigator fix information and difference positioning information of this information, it is ensured that the uniformity that information resolves.
The specific embodiment of the invention further include:
The digital satellite smart antenna of high-precision multimode multi-frequency of the present invention, including satellite antenna module, navigation information resolve
Module, message processing module and information collection supplementary module；
Satellite antenna module includes wide frequency antenna circuit and signal power-devided circuit；Wide frequency antenna circuit is used for while receiving packet
The hybrid analog-digital simulation signal of satellite-signal containing multi-frequency multi-mode and logo signal, wherein fixed comprising satellite navigation and positioning information and difference
Position information；The output end of the direct-connected wide frequency antenna circuit of signal power-devided circuit, and hybrid analog-digital simulation signal constant power is assigned as two-way
Analog signal, i.e. Satellite Simulation signal and logo analog signal are then input to satellite-signal solving unit and logo difference letter
Number solving unit is completed information and is resolved；
It includes satellite-signal solving unit and logo differential signal solving unit that navigation information, which resolves module,；Satellite-signal solution
Unit is calculated for resolving satellite navigation and positioning information, receives the hybrid analog-digital simulation letter from satellite antenna module by signal power-devided circuit
Number, it resolves Satellite Simulation signal and obtains the information such as location information, velocity information, course information, temporal information, and according to predetermined logical
News protocol code simultaneously issues digital information；Logo differential signal solving unit is received for resolving difference positioning information to defend oneself
The hybrid analog-digital simulation signal of star Anneta module signal power-devided circuit resolves logo analog signal and obtains relative position information, and according to
Predetermined communications protocol encodes and issues digital information；
Message processing module connects navigation information and resolves module, resolves the information exchange between module by navigation information
With real-time reception satellite navigation and positioning information and difference positioning information；Based on Differential positioning algorithm, difference positioning information is aided in
Satellite navigation and positioning information is with the accuracy of lifting carrier navigator fix；According to system outputting communication agreement specific requirement again
Encode satellite navigation and positioning information and externally output in real time；
Information collection supplementary module, for being mentioned for satellite antenna module, navigation information resolving module and message processing module
Timestamp is provided for required supply voltage, and to resolve location information with the unified information acquisition moment.
Wherein, satellite antenna module can receive simultaneously multi-frequency multi-mode and defend using wideband conical antenna circuit as core component
Star analog signal, the satellite-signal of logo signal and high band including low-frequency range, two kinds of Signal averagings are hybrid analog-digital simulation letter
Number externally output；
Wherein, it is identical and equal by resistor-type signal power-devided circuit constant power to be assigned as two signal components for hybrid analog-digital simulation signal
Then mixed signal comprising Satellite Simulation signal and logo analog signal is respectively transmitted to navigation information and resolves defending in module
Star signal solving unit and logo differential signal solving unit are completed information and are resolved；
Wherein, signal power-devided circuit is based on the resistance circuit with large bandwidth, Satellite Simulation signal and logo mould
Quasi- signal output port parallel connection adjustable resistance R1And R2, its output impedance is made to have the optimal properties of 50 Europe impedance matchings；
Wherein, navigation information resolves module and uses GNSS board P306, and positioning accuracy and data with higher are defeated
Frequency out, after Satellite Simulation signal is input to satellite-signal solving unit, the autonomous stability for detecting satellite-signal
Whether meet given threshold requirement, and automatically switches to the signal frequency that stability is optimal in multi-frequency multi-mode satellite-signal
Road, stabilization, continuously output satellite navigation positioning data；
Wherein, after the completion of satellite-signal solving unit resolves Satellite Simulation signal, according to NMEA0183 protocol code satellite
Navigator fix information, and the information is sent with high speed baud rate (>=230400bps) by RS422；
Wherein, after the completion of logo differential signal solving unit resolves logo analog signal, according to NMEA0183 protocol code
Difference positioning information, and the information is sent with high speed baud rate (>=230400bps) by RS422；
Wherein, difference positioning information assisting navigation location information realizes high-precision navigator fix, and Differential positioning algorithm can root
Pass through Ethernet or High Speed Serial on-line tuning model and its parameter according to navigator fix actual performance demand；
Wherein, message processing module is using the ARM board AM3358 for running (SuSE) Linux OS, by serial ports and outside
Portion's equipment realizes information exchange and online updating.
Wherein, message processing module by RS422 with high speed baud rate (>=230400bps) from satellite-signal solving unit
Satellite navigation and positioning information is received, by RS422 with high speed baud rate (>=230400bps) from logo differential signal solving unit
Difference positioning information is received, is exported with high speed baud rate (>=230400bps) via difference after the completion of difference resolves by RS422
Satellite navigation and positioning information after dividing navigator fix information auxiliary to calculate；
Wherein, message processing module can recompile externally output number according to the specific requirement of external outputting communication specification
According to specific format.
Wherein, the information collection supplementary module includes system power supply circuit and real time clock circuit, system power supply circuit
Each level power supply (5V, 3.3V, 24V) needed for being provided to system；Real-time clock module is satellite navigation and positioning information and difference
Location information provides timestamp, and unified information acquires the moment to guarantee the consistency of information collection.
It is obvious to a person skilled in the art that invention is not limited to the details of the above exemplary embodiments, Er Qie
In the case where without departing substantially from spirit or essential attributes of the invention, the present invention can be realized in other specific forms.Therefore, no matter
From the point of view of which point, the present embodiments are to be considered as illustrative and not restrictive, and the scope of the present invention is by appended power
Benefit requires rather than above description limits, it is intended that all by what is fallen within the meaning and scope of the equivalent elements of the claims
Variation is included within the present invention.Any reference signs in the claims should not be construed as limiting the involved claims.
Claims (9)
1. a kind of digital satellite smart antenna of multimode multi-frequency, it is characterised in that: resolved including satellite antenna module, navigation information
Module, message processing module and information collection supplementary module；
The satellite antenna module receives mixed frequency signal, and mixed frequency signal constant power is divided into the identical signal of two-way and is transferred to and is led
Information of navigating resolves module, includes Satellite Simulation signal and logo analog signal in the signal；
Navigation information resolves module and carries out real-time resolving to Satellite Simulation signal and logo analog signal, and by the satellite after resolving
Navigator fix information and difference positioning information carry out digital coding according to fixed communication agreement and are transmitted to message processing module；
Message processing module parses received satellite navigation and positioning information and difference positioning information, to the satellite after parsing
Navigator fix information and difference positioning information are completed difference using Differential positioning algorithm and are resolved, the information after being resolved to difference according to
The requirement of system output communication protocol is encoded and is exported in real time, and message processing module resolves module publication control to navigation information and refers to
It enables, setting navigation information resolves module and works in predetermined operating mode, and control instruction includes enabled instruction, halt instruction, work
Pattern configurations instruction, information inquiry instruction；
Information collection supplementary module is satellite antenna module, navigation information resolves module and message processing module powers and provides reality
When clock reference.
2. the digital satellite smart antenna of a kind of multimode multi-frequency according to claim 1, it is characterised in that: the satellite day
Wire module includes wide frequency antenna circuit and signal power-devided circuit；Wide frequency antenna circuit has conical antenna structure, wide frequency antenna electricity
Road receives mixed frequency signal and mixed frequency signal is transferred to signal power-devided circuit, and signal power-devided circuit is by function such as received mixed frequency signals
Rate is divided into the identical signal of two-way, the two output ports output through power-devided circuit respectively of the identical signal of two-way.
3. the digital satellite smart antenna of a kind of multimode multi-frequency according to claim 2, it is characterised in that: signal function point electricity
Road is resistor-type signal power-devided circuit, two output port parallel connection adjustable resistances.
4. the digital satellite smart antenna of a kind of multimode multi-frequency according to claim 1 or 2, it is characterised in that: described to lead
It includes satellite-signal solving unit and logo differential signal solving unit that information of navigating, which resolves module,；
The satellite-signal solving unit receives the mixed frequency signal all the way of signal power-devided circuit output simultaneously by GNSS board P306
Real-time resolving goes out satellite navigation and positioning information, and satellite navigation and positioning information is carried out digital coding simultaneously according to fixed telecommunication agreement
Via High Speed Serial or Ethernet output to message processing module；
The logo differential signal solving unit receives the another way mixing of signal power-devided circuit output by difference board SBX-4
Signal and real-time resolving go out difference positioning information, and difference positioning information is carried out digital coding according to fixed communication agreement and is led to
High Speed Serial or Ethernet output are crossed to message processing module.
5. the digital satellite smart antenna of a kind of multimode multi-frequency according to claim 4, it is characterised in that: fixed telecommunication association
View is NMEA0183 agreement, High Speed Serial UART.
6. the digital satellite smart antenna of a kind of multimode multi-frequency according to claim 1, it is characterised in that: at the information
It manages module and uses ARM board, message processing module receives navigation information by High Speed Serial and resolves the information that module exports, information
Processing module output interface selects RS422 form, and message processing module includes the TTL-RS422 conversion electricity based on ADM2582E
Road, message processing module reserve High Speed Serial and Ethernet as debugging interface.
7. the digital satellite smart antenna of a kind of multimode multi-frequency according to claim 6, it is characterised in that: ARM board is
AM3358。
8. the digital satellite smart antenna of a kind of multimode multi-frequency according to claim 1, it is characterised in that: the information is adopted
Collecting supplementary module has two kinds of powering modes of DC24V and AC220V；
When selecting AC220V to system power supply, via UPS uninterruptible power supply and filter stability input voltage and noise is filtered out
Afterwards, DC24V is converted to by AD/DC module；DC24V is converted to DC3.3V by DC/DC module, be ARM board, difference board and
The power supply of GNSS board；DC24V is converted to DC5V by DC/DC module, and DC5V is the confession of satellite antenna module by signal power-devided circuit
Electricity, design filter circuit keep DC5V, DC3.3V and DC24V voltage stabilization；
When selecting DC24V to system power supply, DC24V is directly converted to DC3.3V by DC/DC module, is ARM board, difference plate
Card and the power supply of GNSS board；DC24V is directly converted to DC5V by DC/DC module, and DC5V is satellite day by signal power-devided circuit
Wire module power supply, design filter circuit keep DC5V, DC3.3V and DC24V voltage stabilization.
9. a kind of digital satellite smart antenna of multimode multi-frequency according to claim 1 or 8, it is characterised in that: at information
Managing module includes the real time clock circuit based on DS1302, provides timestamp for navigator fix information and difference positioning information.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111123318A (en) * | 2019-12-31 | 2020-05-08 | 泰斗微电子科技有限公司 | Satellite positioning device, satellite signal receiver and terminal equipment |
| CN112526554A (en) * | 2020-11-23 | 2021-03-19 | 哈尔滨工程大学 | Small-sized satellite navigation receiving terminal |
| CN113009528A (en) * | 2021-02-07 | 2021-06-22 | 成都市精准时空科技有限公司 | Multi-frequency multi-mode satellite positioning communication device and hybrid positioning information control method |
| CN113376666A (en) * | 2021-05-31 | 2021-09-10 | 哈尔滨工程大学 | Multimode multi-frequency RTK positioning universal terminal |
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