CN110764401B - Shipborne time synchronization calibration equipment - Google Patents
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- CN110764401B CN110764401B CN201911036097.0A CN201911036097A CN110764401B CN 110764401 B CN110764401 B CN 110764401B CN 201911036097 A CN201911036097 A CN 201911036097A CN 110764401 B CN110764401 B CN 110764401B
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- G04—HOROLOGY
- G04R—RADIO-CONTROLLED TIME-PIECES
- G04R20/00—Setting the time according to the time information carried or implied by the radio signal
- G04R20/02—Setting the time according to the time information carried or implied by the radio signal the radio signal being sent by a satellite, e.g. GPS
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Abstract
The embodiment of the invention discloses shipborne time synchronization calibration equipment, which comprises: the system comprises a time-frequency reference module, a time transmission module, a frequency conversion module, a distance and speed measurement module and a main control module, wherein the time-frequency reference module outputs a reference signal for the time transmission module; the time transmission module modulates the reference signal and outputs a modulation signal; meanwhile, receiving the different-place signals from other ships output after down-conversion of the frequency conversion module, and calculating the initial clock difference between the modulated signal and the different-place signals after down-conversion; the frequency conversion module receives the modulation signal, performs frequency conversion processing on the modulation signal and outputs the processed modulation signal to other ships; the speed and distance measuring module is used for providing measuring information for the time transmission module; the main control module controls and monitors the working state of the modules, obtains initial clock error and measurement information, and processes the obtained information to obtain precise clock error; and calibrating the off-site signals after down-conversion by using the precise clock difference and outputting the calibrated off-site signals to other ships.
Description
Technical Field
The invention relates to the field of time synchronization, in particular to shipborne time synchronization calibration equipment.
Background
High-precision time synchronization is an important guarantee for orderly production of the national people. Time synchronization is divided into absolute time synchronization and relative time synchronization, and some specific applications are more concerned about relative time synchronization, such as a fleet of ships, and after the fleet of ships comes out of the sea, high-precision time synchronization is required to ensure uniform action.
At present, a global satellite navigation system, including a GPS, a Beidou and other systems, is mainly used for realizing one-way time service and ensuring time synchronization among ships, but the time synchronization can not be ensured whether the time in a fleet is synchronous or not and the time synchronization precision is reached.
To solve one or more of the above technical problems, the present invention provides a shipborne time synchronization calibration apparatus.
Disclosure of Invention
The first purpose of the invention is to provide a shipborne time synchronization calibration device, which is designed by utilizing a satellite bidirectional comparison technology and a dynamic error compensation technology, and solves the problem of calibration of relative time synchronization precision in a fleet in a motion state.
A second object of the present invention is to provide an onboard time synchronization calibration system.
The technical scheme is that the method does not achieve the purpose and comprises the following steps:
an on-board time synchronization calibration apparatus comprising:
a time-frequency reference module, a time transmission module, a frequency conversion module, a distance and speed measurement module and a main control module,
the time-frequency reference module is used for outputting a reference signal for the time transmission module;
the time transfer module is configured to modulate the reference signal and output a modulated signal; meanwhile, receiving the different-place signals from other ships output after the down-conversion of the frequency conversion module, and calculating the initial clock error of the modulation signal and the different-place signals after the down-conversion;
the frequency conversion module is configured to receive the modulation signal, perform up-conversion processing on the modulation signal to obtain a radio frequency signal, and output the radio frequency signal to the other ships; simultaneously receiving the allopatric signal and outputting the allopatric signal after down conversion processing to the time transfer module;
the speed and distance measuring module is used for providing measuring information for the time transmission module;
the main control module is used for controlling and monitoring the working state of the modules, acquiring initial clock error and measurement information, and processing the acquired information to obtain precise clock error; and calibrating the different-place signals after the down-conversion by using the precision clock difference and outputting the calibrated different-place signals to other ships.
Preferably, the measurement information includes time stamp information, position information, and velocity information.
Preferably, the main control module obtains the precise clock error by using a dynamic time delay compensation algorithm and correcting the acquired information.
Preferably, the onboard time synchronization calibration device transmits and receives the local signal and the allopatric signal through an onboard antenna.
Preferably, the time transfer module includes:
the first receiving end of the time transfer module is connected with the output end of the time frequency reference module;
the second receiving end of the time transfer module is connected with the down-conversion output end of the frequency conversion module;
the time transmission module output end is connected with the frequency conversion module up-conversion receiving end;
the time transmission module first data transmission port is connected with the main control module first serial port;
and the second data transmission port of the time transmission module is connected with the second serial port of the distance and speed measuring module.
Preferably, the frequency conversion module includes:
an up-conversion receiving end connected with the output end of the time transmission module
An up-conversion output end connected with a first receiving end of the shipborne antenna,
a down-conversion receiving end connected with the output end of the ship-borne antenna,
the down-conversion output end is connected with the second receiving end of the time transfer module;
and the frequency conversion module data transmission port is connected with the second serial port of the main control module.
Preferably, the distance and speed measuring module includes: the first serial port of the distance and speed measuring module is connected with the third serial port of the main control module; and
and the second serial port of the distance and speed measuring module is connected with the time transmission module.
Preferably, the main control module includes:
the time transmission module comprises a time transmission module first serial port, a time output module first serial port and a time output module first serial port, wherein the time transmission module first serial port is connected with the time transmission module first data transmission port;
the main control module second serial port is connected with the frequency conversion module data transmission port;
the third serial port of the main control module is connected with the first serial port of the distance and speed measuring module;
and the fourth serial port of the main control module is connected with the data transmission port of the shipborne antenna.
Preferably, the shipboard antenna comprises:
the first receiving end of the shipborne antenna is connected with the up-conversion output end;
the second receiving end of the shipborne antenna is used for carrying out signal interactive transmission with other ships;
the output end of the shipborne antenna is connected with the down-conversion receiving end;
and the shipborne antenna data transmission port is connected with the fourth serial port of the main control module.
In order to achieve the second purpose, the invention adopts the following technical scheme:
a shipborne time synchronization calibration system comprises N shipborne time synchronization calibration devices, wherein the N devices are any one device for realizing a first purpose and are respectively arranged on N ships;
and taking one of the devices as a standard device, receiving signals of the devices of the other N-1 ships by the standard device, and calibrating the signals of the devices of the N-1 ships based on local signals of the standard device, so as to send the calibrated signals of the devices of the N-1 ships back to the N-1 ships, wherein N is a positive integer which is more than or equal to 2.
The invention has the following beneficial effects:
the invention designs dynamic time synchronization calibration equipment by utilizing a satellite bidirectional comparison technology and a dynamic error compensation technology, effectively solves the calibration problem of the relative time synchronization precision inside a fleet in a motion state, and improves the time synchronization precision.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 illustrates an on-board time synchronization calibration apparatus of the present invention;
reference numerals: a time-frequency reference module 1; a time transfer module 2; a frequency conversion module 3; a speed and distance measuring module 4; a main control module 5; a shipborne antenna 6; a time-frequency reference module output terminal 11; a time transfer module first receiving end 21; a time transfer module second receiving terminal 23; a time transfer module output 22; a time transfer module second data transmission port 24; a time transfer module first data transfer port 25; an up-conversion receiving terminal 31; a down-conversion output 32; an up-conversion output 33; a down-conversion receiving terminal 34; a frequency conversion module data transmission port 35; a first serial port 41 of a distance and speed measuring module; a second serial port 42 of the distance and speed measuring module; a master control module first serial port 51; a main control module second serial port 52; a third serial port 53 of the main control module; a fourth serial port 54 of the main control module; a first receiving end 61 of the shipborne antenna; a second receiving end 62 of the shipboard antenna; an onboard antenna output 63; a shipborne antenna data transmission port 64; other vessels off-site signals 7.
Detailed Description
In order to more clearly illustrate the present invention, the present invention is further described below with reference to the accompanying drawings. Similar parts in the figures are denoted by the same reference numerals. It is to be understood by persons skilled in the art that the following detailed description is illustrative and not restrictive, and is not to be taken as limiting the scope of the invention.
The embodiment of the invention provides shipborne time synchronization calibration equipment, which comprises:
a time-frequency reference module 1; a time transfer module 2; a frequency conversion module 3; a speed and distance measuring module 4; a main control module 5; a shipborne antenna 6;
the time-frequency reference module is used for outputting a reference signal for the time transmission module;
the time transfer module is configured to modulate the reference signal and output a modulated signal; meanwhile, receiving the different-place signals from other ships output after the down-conversion of the frequency conversion module, and calculating the initial clock error of the modulation signal and the different-place signals after the down-conversion;
the frequency conversion module is configured to receive the modulation signal, perform up-conversion processing on the modulation signal to obtain a radio frequency signal, and output the radio frequency signal to the other ships; simultaneously receiving the allopatric signal and outputting the allopatric signal after down conversion processing to the time transfer module;
the speed and distance measuring module is used for providing measuring information for the time transmission module;
the main control module is used for controlling and monitoring the working state of the modules, acquiring initial clock error and measurement information, and processing the acquired information to obtain precise clock error; and calibrating the different-place signals after the down-conversion by using the precision clock difference and outputting the calibrated different-place signals to other ships.
And the shipborne time synchronization calibration equipment transmits and receives the local signal and the remote signal through a shipborne antenna.
Taking a ship a and a ship B as an example, two on-board time synchronization calibration devices are arranged in the A, B ship. The A ship and the B ship run in a certain distance on the sea area, and the time synchronization precision of the A ship and the B ship needs to be ensured so as to ensure that the A ship and the B ship act in unison. For the sake of clarity, the whole time calibration process will be described by using the onboard time synchronization calibration device installed in the ship a as the main body and using the signal sent by the onboard time synchronization calibration device installed in the ship B as the remote signal.
Firstly, when in work, a time-frequency reference module 1 of the shipborne time synchronization calibration equipment, such as an atomic clock on a ship; providing a 1Pps second pulse signal and a 10MHz or 5MHz reference signal for the time transfer module 2 to be used as a working reference;
the time transmission module modulates the reference signal and outputs a modulated signal to the A ship frequency conversion module 3; the frequency conversion module 3 of the ship A performs up-conversion processing to form a radio frequency signal, the radio frequency signal is transmitted through a ship-borne antenna, and the signal is forwarded to equipment located on the ship B by using a communication satellite. And completing the transmission of the signal from the ship A to the ship B. It will be understood by those skilled in the art that this initial signal is the rf signal generated by the above-described processing of the a-ship local reference signal.
Correspondingly, the time-frequency reference module of the equipment positioned on the B ship also provides a 1Pps second pulse signal and a reference signal of the B ship of 10MHz or 5MHz for the time transmission module to be used as a working reference; the time transmission module modulates the reference signal of the ship B and outputs the modulated signal of the ship B to the frequency conversion module of the ship B; the frequency conversion module of the ship B performs up-conversion processing to form a radio frequency signal of the ship B, the radio frequency signal of the ship B is transmitted through the shipborne antenna, and the signal is forwarded to the time transmission module located on the ship A by using the communication satellite. And completing the transmission of the signal from the ship B to the ship A. Namely, the transmission of the allopatric signals of other ships to the ship-mounted time synchronization calibration equipment of the ship A is completed.
After the two ships A and B finish transmitting signals to each other, a frequency conversion module 3 in the equipment of the ship A receives a different-place radio-frequency signal from the ship B forwarded by a ship-mounted antenna 6 and a communication satellite (not shown in the figure), performs down-conversion processing on the different-place radio-frequency signal to obtain an intermediate-frequency signal, and inputs the intermediate-frequency signal to a ship A time transmission module by the frequency conversion module to demodulate the intermediate-frequency signal. And finishing the processing after receiving the remote signal. As can be understood by those skilled in the art, in order to explain more clearly the processing process of the signals in the onboard time synchronization calibration device and the remote time device, the remote signal received by the onboard time synchronization calibration device finally realizes the process of transmitting the reference signal inside the B ship from the modulated signal inside the B ship to the remote radio frequency signal inside the B ship, which is the signal transmission inside the time device of the B ship, and the remote radio frequency signal finally output after the above process is the remote signal 7 received by the onboard time synchronization calibration device.
Because A, B two boats are moving all the time, therefore the module 4 of measuring speed and finding range of A boat provides the measurement information for time transfer module 2, is used for providing the time scale for time delay measurement of time transfer module 2, for example time stamp information, position information and speed information, can improve synchronous precision more effectively, reduces because the synchronous error that the ship motion arouses. The time transfer module 2 calculates the initial clock error of the A ship and the B ship according to the information. Similarly, the ship B is in motion all the time, so the speed and distance measuring module of the ship B also provides a time scale for the time transmission module of the ship B to perform time delay measurement. The speed and distance measuring module can select a GPS/BDS receiving module.
And the main control module 5 is used for controlling and monitoring the working state of the modules, acquiring initial clock error and measurement information, processing the acquired information to obtain precise clock error, calibrating the intermediate-frequency signals in different places by using the precise clock error to generate calibrated different-place signals, outputting the calibrated different-place signals, and transmitting the calibrated different-place signals to the ship B from the ship A through the shipborne antenna 6, so that A, B time calibration of the two ships is completed.
The main control module 5 is a control and data processing center for the equipment to work, and the main control module 5 controls and monitors the working states of the time transfer module 2, the frequency conversion module 3, the speed and distance measuring module 4 and the shipborne antenna 6, and obtains initial clock error information between two ships measured by the time transfer module 2 and speed signals and position information of the speed and distance measuring module 4 in real time. After the information is acquired, the main control module 5 calculates the precision clock error between the two ships by using a dynamic time delay compensation algorithm, so that the time synchronization precision between the ship A and the ship B in the motion state is calibrated.
The connection of each module in the equipment is as follows:
the first receiving end 21 of the time transfer module is connected with the output end 11 of the time frequency reference module;
the second receiving end 23 of the time transfer module is connected with the down-conversion output end 32 of the frequency conversion module;
the time transmission module output end 22 is connected with the frequency conversion module up-conversion receiving end 31;
a time transfer module first data transmission port 25 connected with the main control module first serial port 51;
the second data transmission port 24 of the time transmission module is connected with the second serial port 42 of the distance and speed measurement module;
an up-conversion receiving terminal 31 connected with the output terminal 22 of the time transfer module
An up-conversion output terminal 33 connected to a first receiving terminal 61 of the shipborne antenna,
a down-conversion receiving end 34 connected with the output end 63 of the ship-borne antenna,
a down-conversion output terminal 32 connected to the second receiving terminal 23 of the time transfer module;
the frequency conversion module data transmission port 35 is connected with the second serial port 52 of the main control module;
the first serial port 41 of the distance and speed measuring module is connected 53 with the third serial port of the main control module; and
the distance measuring and speed measuring module second serial port 42 is connected with the time transmission module second data transmission port 24;
a main control module first serial port 51 connected to the time transfer module first data transmission port 25;
the main control module second serial port 52 is connected with the frequency conversion module data transmission port 35;
the third serial port 53 of the main control module is connected with the first serial port 41 of the distance and speed measuring module
The main control module fourth serial port 54 is connected with the data transmission port 64 of the shipborne antenna;
a first receiving end 61 of the shipborne antenna, which is connected with the up-conversion output end 33;
a second receiving end 62 of the shipborne antenna, configured to perform signal 7 interactive transmission with the other ship;
the shipborne antenna output end 63 is connected with the down-conversion receiving end 34;
the shipborne antenna data transmission port 64 is connected with the fourth serial port 54 of the main control module;
the high-precision shipborne time synchronization calibration equipment is formed through the connection, and the calibration of the relative time synchronization precision inside a fleet in a motion state is effectively achieved. Of course, those skilled in the art will appreciate that the connection in the present invention is not merely a simple mechanical connection, but is also a wireless connection and data transmission of data and signals.
Of course, it should be understood by those skilled in the art that the two ships described in the present embodiment are only an example, and the present invention is not limited to two ships, and is also applicable to the calibration problem of the time synchronization accuracy of multiple ships, therefore, a second embodiment of the present invention is a shipborne time synchronization calibration system, which includes N shipborne time synchronization calibration devices, where the N devices are the above devices and are respectively disposed on N ships;
and taking one of the devices as a standard device, receiving signals of the devices of the other N-1 ships by the standard device, and calibrating the signals of the devices of the N-1 ships based on local signals of the standard device, so as to send the calibrated signals of the devices of the N-1 ships back to the N-1 ships, wherein N is a positive integer which is more than or equal to 2.
When a plurality of ships move on the sea and the time in the ships needs to be calibrated, the time synchronization calibration equipment installed on one ship is randomly selected as standard equipment, the local signal sent by the standard equipment is a standard signal, meanwhile, other ships send out the self remote signals of other ships to the standard equipment, and the process that other ships send out the remote signals refers to the process that the ship B sends out the remote signals. And the standard equipment calibrates the remote signals of the equipment of other ships based on the local signals of the standard equipment, so that the calibrated remote signals of other ships are sent back to other ships, and the calibration among a plurality of ships is realized.
The method utilizes a satellite bidirectional comparison technology and a dynamic error compensation technology to design dynamic time synchronization calibration equipment, effectively solves the problem of calibration of relative time synchronization precision inside a fleet in a motion state, and improves the synchronization precision.
It should be understood that the above-mentioned embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention, and it will be obvious to those skilled in the art that other variations or modifications may be made on the basis of the above description, and all embodiments may not be exhaustive, and all obvious variations or modifications may be included within the scope of the present invention.
Claims (8)
1. An on-board time synchronization calibration apparatus, comprising:
a time-frequency reference module, a time transmission module, a frequency conversion module, a distance and speed measurement module and a main control module,
the time-frequency reference module is used for outputting a reference signal for the time transmission module;
the time transfer module is configured to modulate the reference signal and output a modulated signal; meanwhile, receiving the different-place signals from other ships output after the down-conversion of the frequency conversion module, and calculating the initial clock error of the modulation signal and the different-place signals after the down-conversion;
the frequency conversion module is configured to receive the modulation signal, perform up-conversion processing on the modulation signal to obtain a radio frequency signal, and output the radio frequency signal to the other ships; simultaneously receiving the allopatric signal and outputting the allopatric signal after down conversion processing to the time transfer module;
the distance and speed measuring module is used for providing measuring information for the time transmission module, and the measuring information comprises timestamp information, position information and speed information;
the main control module is used for controlling and monitoring the working state of the modules, acquiring initial clock error and measurement information, and processing the acquired information to obtain precise clock error; and calibrating the different-place signals after the down conversion by using the precise clock error and outputting the calibrated different-place signals to other ships, wherein the main control module corrects the acquired information by using a dynamic time delay compensation algorithm to obtain the precise clock error.
2. The apparatus of claim 1, wherein the onboard time synchronization calibration apparatus transmits and receives local signals and the off-site signals via an onboard antenna.
3. The apparatus of claim 2, wherein the time transfer module comprises:
the first receiving end of the time transfer module is connected with the output end of the time frequency reference module;
the second receiving end of the time transfer module is connected with the down-conversion output end of the frequency conversion module;
the time transmission module output end is connected with the frequency conversion module up-conversion receiving end;
the time transmission module first data transmission port is connected with the main control module first serial port;
and the second data transmission port of the time transmission module is connected with the second serial port of the distance and speed measuring module.
4. The apparatus of claim 3, wherein the frequency conversion module comprises:
an up-conversion receiving end connected with the output end of the time transmission module,
an up-conversion output end connected with a first receiving end of the shipborne antenna,
a down-conversion receiving end connected with the output end of the ship-borne antenna,
the down-conversion output end is connected with the second receiving end of the time transfer module;
and the frequency conversion module data transmission port is connected with the second serial port of the main control module.
5. The apparatus of claim 4, wherein the ranging and velocity measurement module comprises: the first serial port of the distance and speed measuring module is connected with the third serial port of the main control module; and
and the second serial port of the distance and speed measuring module is connected with the time transmission module.
6. The device of claim 5, wherein the master module comprises:
the time transmission module comprises a time transmission module first serial port, a time output module first serial port and a time output module first serial port, wherein the time transmission module first serial port is connected with the time transmission module first data transmission port;
the main control module second serial port is connected with the frequency conversion module data transmission port;
the third serial port of the main control module is connected with the first serial port of the distance and speed measuring module;
and the fourth serial port of the main control module is connected with the data transmission port of the shipborne antenna.
7. The apparatus of claim 6, wherein the onboard antenna comprises:
the first receiving end of the shipborne antenna is connected with the up-conversion output end;
the second receiving end of the shipborne antenna is used for carrying out signal interactive transmission with other ships;
the output end of the shipborne antenna is connected with the down-conversion receiving end;
and the shipborne antenna data transmission port is connected with the fourth serial port of the main control module.
8. An on-board time synchronization calibration system, comprising N on-board time synchronization calibration devices, said N devices being the devices of any one of claims 1-7, respectively, disposed on N vessels, respectively;
and taking one of the devices as a standard device, receiving signals of the devices of the other N-1 ships by the standard device, calibrating the signals of the devices of the N-1 ships based on local signals of the standard device, and sending the calibrated signals of the devices of the N-1 ships back to the N-1 ships, wherein N is a positive integer greater than or equal to 2.
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