Special Mic The classification of GPS navigators has its own practicality.
What are the categories of GPS navigator
Classification by the purpose of the receiver
1.navigation receiver
This type of receiver is mainly used for navigation of the motion carrier, which can give the position and speed of the carrier in real time.This type of receiver generally uses C/A code pseudo -distance measurement. The real -time positioning accuracy of the single point is low, generally 10m, and the SA affects 100m.This type of receiver is cheap and widely used.Depending on the application field, such receivers can be further divided into:
car type -for vehicle navigation positioning;
navigation type -for Ship navigation positioning;
Aviation type -for aircraft navigation positioning.
Due to the fast Running speed of the aircraft, the receiver used on aviation requires to adapt to high -speed exercise.
Starry type -for navigation positioning for satellites.Because the speed of satellites is as high as 7km/s, the requirements for receiving machines are higher.
2.Ground -type receiver
The ground -type receiver is mainly used for precision land measurement and precision engineering measurement.This type of instrument mainly uses carrier phase observation values for relative positioning, with high positioning accuracy.The structure of the instrument is complicated and the price is more expensive.
3.Time -type receiver
This type of receiver mainly uses the high -precision time standard provided by the GPS satellite to be awarded, and it is often used in the time of time in the observatory and radio communication.
Classified by the carrier frequency of the receiver
Single -frequency receiver
Single -frequency receiver can only receive the L1 carrier signal, and the carrier phase observation value can be determined.Because the effect of the ionization layer delay cannot be effectively eliminated, a single -frequency receiver is only applicable to the precision positioning of the short -based line (& lt; 15km).
Dual -frequency receiver
The dual -frequency receiver can receive L1 and L2 carrier signals at the same time.The use of dual -frequency delay on the ionization layer can eliminate the effects of ionizing layers on the delay of electromagnetic wave signals. Therefore, dual -frequency receiver can be used for precision positioning of thousands of kilometers long.
Classified by the number of channel channels
The GPS receiving function also receives the signals of multiple GPS satellites at the same time. In order to separate the signal of different satellites received to achieve the tracking, processing and measurement of satellite signals, devices with such functions are called antenna signal channels.The types of channels that the receiver can be divided into: multi -channel receiver; sequential channel receiver; multi -channel multi -purpose channel receiver.
Classified by the working principle of the receiver
Code -related receiver
Code -related receiver uses code -related technologies to obtain pseudo -distance observation values.
Square receiver
The Square receiver uses the Square technology of the carrier signal to remove the adjustment signal to restore the complete carrier signal. The phase difference between the carrier signal generated in the receiving machine through the phase meter is determined by the phase difference between the carrier signal generated in the receiverEssence
Hybrid receiver
This instrument is a comprehensive advantage of the above two receiving machines. It can obtain the code phase pseudo distance or the carrier phase observation value.
Interference receiver
This receiver uses the GPS satellite as a radio power source. The interference measurement method is used to determine the distance between the two measuring stations.
GPS navigator is classified according to use
1As well asnavigation receiver
This type of receiver is mainly used for navigation of the motion carrier, which can give the position and speed of the carrier in real time.This type of receiver is generally adoptedC/ACode pseudo -distance measurement, a single point of real -time positioning accuracy is low, generally10M,haveSAThe influence is100MEssenceThis type of receiver is cheap and widely used.Depending on the application field, such receivers can be further divided into:
car type -for vehicle navigation positioning;
navigation type -for Ship navigation positioning;
Aviation type -for aircraft navigation positioning.Due to the fast Running speed of the aircraft, the receiver used on aviation requires to adapt to high -speed exercise.
Starry type -for navigation positioning for satellites.Due to the high speed of satellites7km/sThe above, so the requirements for receiving machines are higher.
2. Destiny receiver machine
The ground -type receiver is mainly used for precision land measurement and precision engineering measurement.This type of instrument mainly uses carrier phase observation values for relative positioning, with high positioning accuracy.The structure of the instrument is complicated and the price is more expensive.
3. Time -type receiver
This type of receiver is mainly usedGPSThe high -precision time standard provided by satellites is often used in the time of time in the Observatory and radio communication.
Classified by the carrier frequency of the receiver
1. Single -frequency receiver
Single -frequency receiver can only receiveL1Carrier signal, determine the observation value of the carrier phase.Because the effect of the ionization layer cannot be effectively eliminated, the single -frequency receiver is only applicable to the short -based line (& lt; 15km) Precision positioning.
1. Dual -frequency receiver
Dual -frequency receiver can be received at the same timeL1,,L2Carrier signal.The use of dual -frequency delay on the ionization layer can eliminate the effects of ionizing layers on the delay of electromagnetic wave signals. Therefore, dual -frequency receiver can be used for precision positioning of thousands of kilometers long.
Classified by the number of channel channels
GPSReceive functions at the same timeGPSSatellite signals, in order to separate the signals of different satellites received to achieve the tracking, processing and measurement of satellite signals. Meters with such functions are called antenna signal channels.The types of channels that are received according to the receiver can be divided into:
Multi -channel receiver
Order channel receiver
Multi -way multi -use channel receiver
Classified by the working principle of the receiver
Code -related receiver
Code -related receiver uses code -related technologies to obtain pseudo -distance observation values.
Square receiver
The Square receiver uses the Square technology of the carrier signal to remove the adjustment signal,,To restore the complete carrier signal, the phase difference between the carrier signal generated in the receiving machine through the phase meter is determined to determine the pseudo -distance observation value.
Hybrid receiver
This instrument is a comprehensive advantage of the above two receiving machines. It can obtain the code phase pseudo distance or the carrier phase observation value.
Interference receiver
This kind of receiver isGPSAs a radio source, the satellite uses the interference measurement method to determine the distance between the two stations.
go through20The practice of the rest of the year proves,GPSThe system is a high -precision, all -weather and global radio navigation, positioning and timing multi -functional system.GPSTechnology has developed into an international high -tech industry with multi -field, multi -mode, multi -purpose, and multi -model.
MeasuringGPS
The ground -type receiver is mainly used for precision land measurement and precision engineering measurement.This type of instrument mainly uses carrier phase observation values for relative positioning, with high positioning accuracy.The structure of the instrument is complicated and the price is more expensive.According to the use of use and accuracy, it is also divided into static (single -frequency) receiver and dynamic (dual -frequency) receiver.RTKEssence
carGPS
When it is made through hardware and softwareGPSWhen the positioning terminal is used for vehicle positioning, it is called a carGPS,However, the positioning alone is not good, and this positioning information must be passed to the alarm center or on the carGPSWith the holder, we call it a third party.soGPSThe positioning system also containsGSMNetwork Communication (mobile phone communication), passGSMThe network sends satellite positioning information to a third party by SMS.Interpret SMS with a microcomputer and display the location of the vehicle on the electronic map.This realizes the carGPSposition.At the same time, install the corresponding detection sensor on the car, and use the carGPSPositioningGSMThe network communication function can also send the anti -theft alarm information to a third party, or send this alarm phone and SMS directly to the owner's mobile phone, complete the car to complete the carGPSanti -theft alarm.It can be seen here that the carGPSPositioningGSMThe network part is actually a smartphone that can communicate with third parties. You can also seize the vehicle by the driver, and the driver is sent to the third party.So the carGPSPositioning is positioning, anti -theft, and anti -robbery.
Similar carGPS
Similar carGPSTerminals include positioning mobile phones, personal positioners, etc.GPSSatellite positioning is due to the third -party positioning service, so it is necessary/ /Annual service fee.
All currentGPSThere is no navigation function for positioning the terminal.Because the hardware and software need to be increased, the cost is increased.
GPSEarly warning device
GPSThe early warning device is passedGPSSatelliteGPSSet the coordinates in the early warning device to complete, such as encountering an electronic eye, and then set up a coordinate directly below the electronic eye through the relevant device.Before300Early warning will start around Mi, telling the owner that there is an electronic eye test in front of the owner, and it cannot be drove over speed, which plays a warning role.Such accuracy is related to the amount of data points, mainly to achieve the use of satellite positioning.