CN113820945A - High-precision clock synchronization system based on 5G - Google Patents
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Abstract
The invention provides a high-precision clock synchronization system based on 5G, which comprises a plurality of time synchronization devices and a data center, wherein the time synchronization devices are connected with the data center through a network; the data center comprises a clock generation circuit and a 5G communication circuit, wherein the clock generation circuit generates a clock synchronization signal according to a clock signal received by the 5G communication circuit and coming from the outside; the time synchronization device comprises a 5G module, a control module and a clock synchronization module, wherein the 5G module is connected with the control module, the control module is connected with the clock synchronization module, the 5G module is used for receiving a clock synchronization signal sent by a data center and sending the clock synchronization signal to the control module for processing, the control module adjusts the clock synchronization signal according to communication delay between the data center and the time synchronization device and sends the adjusted clock synchronization signal to the clock synchronization module, and the clock synchronization module synchronizes a clock of the power equipment according to the received clock synchronization signal.
Description
Technical Field
The invention relates to the technical field of electric power, in particular to a high-precision clock synchronization system based on 5G.
Background
In the prior art, devices of different manufacturers are often adopted for equipment in a power grid, and a special time synchronization device is often required to ensure clock synchronization of each device in practical application. The time synchronizer, which is a conventional power device, must be able to remain normal at all times. However, since the existing time synchronizer operates as a single machine, a worker must go to the site to check the time synchronizer to ensure normal operation. When a problem occurs, due to the influence of factors such as traffic, environment and the like, the workers cannot arrive at the site for treatment in time. This results in untimely maintenance of the time synchronization device.
Disclosure of Invention
The invention aims to provide a high-precision clock synchronization system based on 5G, which can realize high-precision online clock synchronization of power equipment without the need of workers to arrive at the site for processing.
In order to realize the above purpose of the invention, the technical scheme provided by the invention is as follows:
a high-precision clock synchronization system based on 5G comprises a plurality of time synchronization devices and a data center; the data center comprises a clock generation circuit and a 5G communication circuit, wherein the clock generation circuit generates a clock synchronization signal according to a clock signal received by the 5G communication circuit and from the outside, and sends the clock synchronization signal to the plurality of time synchronization devices through the 5G communication circuit; the time synchronization device comprises a 5G module, a control module and a clock synchronization module, wherein the 5G module is connected with the control module, the control module is connected with the clock synchronization module, the 5G module is used for receiving a clock synchronization signal sent by a data center and sending the clock synchronization signal to the control module for processing, the control module adjusts the clock synchronization signal according to communication delay between the data center and the time synchronization device and sends the adjusted clock synchronization signal to the clock synchronization module, and the clock synchronization module synchronizes a clock of the power equipment according to the received clock synchronization signal.
When the system provided by the invention is used, the time synchronization device is arranged at one side of the power equipment, and the clock synchronization module of the time synchronization device is connected with the clock synchronization port of the power equipment, when the system is used specifically, when clock synchronization is needed, a data center receives a clock signal from the outside through a 5G communication circuit of the data center, then generates a clock synchronization signal according to the clock signal, and sends the clock synchronization signal to the time synchronization device through the 5G communication circuit; the 5G module receives a clock synchronization signal sent by a data center and sends the clock synchronization signal to the control module for processing, the control module adjusts the clock synchronization signal according to communication delay between the data center and the time synchronization device and sends the adjusted clock synchronization signal to the clock synchronization module, and the clock synchronization module synchronizes a clock of the power equipment according to the received clock synchronization signal.
Preferably, the time synchronization device further comprises a power supply module, the power supply module is connected with the 5G module, the control module and the clock synchronization module, and the power supply module supplies power to the 5G module, the control module and the clock synchronization module.
Preferably, the power module comprises a voltage reduction module, a comparison switch module, a first voltage division module, a second voltage division module and an output module, wherein the comparison switch module comprises a first input end, a second input end and an output end; the voltage reduction module is connected with an external power supply and is connected with a first input end of the comparison switch module through the first voltage division module, a second input end of the comparison switch module is connected with the external power supply through the second voltage division module, an output end of the comparison switch module is connected with the output module, and the output module is connected with the 5G module, the control module and the clock synchronization module.
In the power module, a voltage reduction module is connected with a voltage output by an external power supply, the voltage reduction module is used for reducing the voltage of the connected voltage and outputting the reduced voltage to a first input end of a comparison switch module through a first voltage division module, and the voltage output by the external power supply is output to a second input end of the comparison switch module through a second voltage division module; the comparison switch module is switched on when the voltage of the second input end is greater than the voltage of the first input end, so that the output module outputs the voltage to the supplied power device, and the comparison switch module is switched off when the voltage of the second input end is less than the voltage of the first input end, so that the output module does not output the voltage, and no power is supplied. Therefore, normal power supply can be realized when the voltage of the external power supply is higher, and the power supply is cut off when the voltage of the external power supply is lower, so that the power consumption caused by continuous power supply in a low-voltage state is avoided, the power consumption can be reduced, and the power consumption of the external power supply is avoided being dead.
Preferably, the voltage reduction module comprises a voltage stabilizing circuit and a linear regulator, the voltage stabilizing circuit is connected with the external power supply and the linear regulator, and the linear regulator is connected with the first input end of the comparison switch module through the first voltage division module. The voltage stabilizing circuit is connected with the voltage output by the external power supply, and outputs the voltage to the linear voltage stabilizer after stabilizing the voltage of the connected voltage; after the linear voltage stabilizer performs voltage reduction conversion on the input voltage, the output voltage is output to the first input end of the comparison switch module through the first voltage division module. By combining the voltage stabilizing circuit and the linear voltage stabilizer, the voltage output by the external power supply is subjected to voltage reduction and stabilization, and the output voltage is stable and does not change along with the change of the input voltage.
Preferably, the 5G communication circuit comprises a signal input circuit, a first Ethernet controller circuit, a second Ethernet controller circuit, a WAN interface circuit, a SIM card circuit, a conversion interface, a memory circuit, a microprocessor, a wireless transceiver, and a radio frequency front end circuit, said signal input circuit being connected to said clock generation circuit, said signal input circuit, said WAN interface circuit, said switch interface, and said first ethernet controller circuit all being electrically connected to said second ethernet controller circuit, the first Ethernet controller circuit, the SIM card circuit and the memory circuit are all electrically connected with the conversion interface, a first port of the rf front-end circuit is electrically connected to the memory circuit via the microprocessor, the second port of the rf front-end circuit is electrically connected to the memory circuit via the wireless transceiver.
Clock synchronizing signal passes through signal input circuit and gets into 5G communication module, the process first ethernet control circuit and second ethernet control circuit are the control circuit of core after decoding, send 5G business information to time synchronizer has improved the transmitting efficiency and the receiving sensitivity of signal greatly, just 5G communication module overall structure is comparatively simple, builds easily, and signal is sent and is received stability height, can greatly reduced later maintenance cost.
Preferably, the 5G module includes a main circuit board, a 5G antenna, and a 5G frequency multiplication suppression circuit, the 5G frequency multiplication suppression circuit is connected between the main circuit board and the 5G antenna for suppressing a 5G frequency multiplication signal, and the main circuit board is connected with the control module.
Preferably, the 5G frequency doubling suppression circuit includes a first resonant circuit, a second resonant circuit and an intermediate capacitor, one end of the first resonant circuit is used for connecting the main circuit board, the other end of the first resonant circuit is connected to one end of the intermediate capacitor, the other end of the intermediate capacitor is connected to one end of the second resonant circuit, and the other end of the second resonant circuit is used for connecting the 5G antenna.
Preferably, the control module comprises at least one of a single chip, a DSP chip, an ARM chip and an FPGA chip.
According to the technical scheme, the invention has the following advantages:
the high-precision clock synchronization system based on 5G provided by the invention can realize high-precision online clock synchronization of power equipment without the need of workers to arrive at the site for processing.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.
Fig. 1 is a schematic structural diagram of a 5G-based high-precision clock synchronization system.
Fig. 2 is a schematic structural diagram of a power module.
Fig. 3 is a schematic structural diagram of a 5G communication circuit.
Fig. 4 is a schematic structural diagram of a 5G module.
Detailed Description
Example one
In order to make the objects, features and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the embodiments described below are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1, a high-precision clock synchronization system based on 5G includes a plurality of time synchronization devices and a data center; the data center comprises a clock generation circuit and a 5G communication circuit, wherein the clock generation circuit generates a clock synchronization signal according to a clock signal received by the 5G communication circuit and from the outside, and sends the clock synchronization signal to the plurality of time synchronization devices through the 5G communication circuit; the time synchronization device comprises a 5G module, a control module and a clock synchronization module, wherein the 5G module is connected with the control module, the control module is connected with the clock synchronization module, the 5G module is used for receiving a clock synchronization signal sent by a data center and sending the clock synchronization signal to the control module for processing, the control module adjusts the clock synchronization signal according to communication delay between the data center and the time synchronization device and sends the adjusted clock synchronization signal to the clock synchronization module, and the clock synchronization module synchronizes a clock of the power equipment according to the received clock synchronization signal.
When the system provided by the invention is used, the time synchronization device is arranged at one side of the power equipment, and the clock synchronization module of the time synchronization device is connected with the clock synchronization port of the power equipment, when the system is used specifically, when clock synchronization is needed, a data center receives a clock signal from the outside through a 5G communication circuit of the data center, then generates a clock synchronization signal according to the clock signal, and sends the clock synchronization signal to the time synchronization device through the 5G communication circuit; the 5G module receives a clock synchronization signal sent by a data center and sends the clock synchronization signal to the control module for processing, the control module adjusts the clock synchronization signal according to communication delay between the data center and the time synchronization device and sends the adjusted clock synchronization signal to the clock synchronization module, and the clock synchronization module synchronizes a clock of the power equipment according to the received clock synchronization signal.
In a specific implementation, the clock generation circuit includes a first phase sampler, a second phase sampler, a low pass filter, a band pass filter, a synthesized signal generator, a phase-locked loop, and a phase adjuster; the input end of the first phase sampler is used for receiving the first signal from the outside and carrying out phase sampling on the first signal from the outside based on a reference signal; the input end of the second phase sampler is used for receiving the second signal from the outside and carrying out phase sampling on the second signal from the outside based on a reference signal; the input end of the low-pass filter is connected with the output end of the first phase sampler and is used for low-pass filtering the sampling signal of the first phase sampler; the input end of the band-pass filter is connected with the output end of the second phase sampler and is used for performing band-pass filtering on the sampling signal of the second phase sampler; the input end of the synthesized signal generator is connected with the output end of the low-pass filter and the output end of the band-pass filter, and is used for performing signal integration on the low-pass filtered phase sampling signal and the band-pass filtered phase sampling signal to obtain a clock phase signal; the input end of the phase-locked loop is connected with the output end of the synthesized signal generator and is used for acquiring and processing the clock phase signal and outputting a clock signal; the first input end of the phase adjuster is used for acquiring the first signal, and the second input end of the phase adjuster is connected with the output end of the phase-locked loop and used for adjusting the phase of the clock signal output by the phase-locked loop based on the phase of the first signal, so that the phase of the clock signal output by the phase-locked loop is consistent with the phase of the first signal.
The first signal is a GPS signal, the second signal is a TCXO signal, and the reference signal is an XO signal.
The clock generation circuit firstly carries out phase sampling on the first signal according to a reference signal, and then carries out low-pass filtering to extract a low-frequency clock phase signal; and simultaneously, carrying out phase sampling on the second signal according to the reference signal, and then carrying out band-pass filtering to extract a clock phase signal of the intermediate frequency. Then, the clock phase signal output by the low-pass filter and the clock phase signal output by the band-pass filter are superposed and synthesized, and the synthesized signal is smoothed through a phase-locked loop to output a slowly-changed clock signal. And finally, phase adjustment is carried out on the clock signal output by the phase-locked loop by referring to the first signal, and the phase is increased or decreased to enable the phase to be consistent with the phase of the first signal, so that the high-precision clock signal is output. The circuit provided by the embodiment is simple to realize, needs fewer added elements, and is small in hardware size and low in cost.
In a specific implementation process, as shown in fig. 1, the time synchronization device further includes a power supply module, the power supply module is connected to the 5G module, the control module, and the clock synchronization module, and the power supply module supplies power to the 5G module, the control module, and the clock synchronization module.
In a specific implementation process, as shown in fig. 2, the power module includes a voltage-reducing module, a comparison switch module, a first voltage-dividing module, a second voltage-dividing module, and an output module, where the comparison switch module includes a first input end, a second input end, and an output end; the voltage reduction module is connected with an external power supply and is connected with a first input end of the comparison switch module through the first voltage division module, a second input end of the comparison switch module is connected with the external power supply through the second voltage division module, an output end of the comparison switch module is connected with the output module, and the output module is connected with the 5G module, the control module and the clock synchronization module.
In the power module, a voltage reduction module is connected with a voltage output by an external power supply, the voltage reduction module is used for reducing the voltage of the connected voltage and outputting the reduced voltage to a first input end of a comparison switch module through a first voltage division module, and the voltage output by the external power supply is output to a second input end of the comparison switch module through a second voltage division module; the comparison switch module is switched on when the voltage of the second input end is greater than the voltage of the first input end, so that the output module outputs the voltage to the supplied power device, and the comparison switch module is switched off when the voltage of the second input end is less than the voltage of the first input end, so that the output module does not output the voltage, and no power is supplied. Therefore, normal power supply can be realized when the voltage of the external power supply is higher, and the power supply is cut off when the voltage of the external power supply is lower, so that the power consumption caused by continuous power supply in a low-voltage state is avoided, the power consumption can be reduced, and the power consumption of the external power supply is avoided being dead.
In a specific implementation process, the voltage reduction module comprises a voltage stabilizing circuit and a linear voltage regulator, the voltage stabilizing circuit is connected with the external power supply and the linear voltage regulator, and the linear voltage regulator is connected with a first input end of the comparison switch module through the first voltage division module. The voltage stabilizing circuit is connected with the voltage output by the external power supply, and outputs the voltage to the linear voltage stabilizer after stabilizing the voltage of the connected voltage; after the linear voltage stabilizer performs voltage reduction conversion on the input voltage, the output voltage is output to the first input end of the comparison switch module through the first voltage division module. By combining the voltage stabilizing circuit and the linear voltage stabilizer, the voltage output by the external power supply is subjected to voltage reduction and stabilization, and the output voltage is stable and does not change along with the change of the input voltage.
In a specific implementation, as shown in fig. 3, the 5G communication circuit includes a signal input circuit, a first ethernet controller circuit, a second ethernet controller circuit, a WAN interface circuit, a SIM card circuit, a conversion interface, a memory circuit, a microprocessor, a wireless transceiver, and a radio frequency front end circuit, said signal input circuit being connected to said clock generation circuit, said signal input circuit, said WAN interface circuit, said switch interface, and said first ethernet controller circuit all being electrically connected to said second ethernet controller circuit, the first Ethernet controller circuit, the SIM card circuit and the memory circuit are all electrically connected with the conversion interface, a first port of the rf front-end circuit is electrically connected to the memory circuit via the microprocessor, the second port of the rf front-end circuit is electrically connected to the memory circuit via the wireless transceiver.
Clock synchronizing signal passes through signal input circuit and gets into 5G communication module, the process first ethernet control circuit and second ethernet control circuit are the control circuit of core after decoding, send 5G business information to time synchronizer has improved the transmitting efficiency and the receiving sensitivity of signal greatly, just 5G communication module overall structure is comparatively simple, builds easily, and signal is sent and is received stability height, can greatly reduced later maintenance cost.
In a specific implementation process, as shown in fig. 4, the 5G module includes a main circuit board, a 5G antenna, and a 5G frequency multiplication suppressing circuit, the 5G frequency multiplication suppressing circuit is connected between the main circuit board and the 5G antenna and is configured to suppress a 5G frequency multiplication signal, and the main circuit board is connected to the control module.
In a specific implementation process, as shown in fig. 4, the 5G frequency doubling suppression circuit includes a first resonant circuit, a second resonant circuit, and an intermediate capacitor, one end of the first resonant circuit is used to connect to the main circuit board, the other end of the first resonant circuit is connected to one end of the intermediate capacitor, the other end of the intermediate capacitor is connected to one end of the second resonant circuit, and the other end of the second resonant circuit is used to connect to the 5G antenna.
In a specific implementation process, the control module comprises at least one of a single chip, a DSP chip, an ARM chip and an FPGA chip.
In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other manners. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the modules is merely a logical division, and in actual implementation, there may be other divisions, for example, multiple modules or components may be combined or integrated into another system, or some features may be omitted, or not implemented. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or modules, and may be in an electrical, mechanical or other form.
The modules described as separate parts may or may not be physically separate, and parts displayed as modules may or may not be physical modules, may be located in one place, or may be distributed on a plurality of network modules. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment.
In addition, functional modules in the embodiments of the present invention may be integrated into one processing module, or each of the modules may exist alone physically, or two or more modules are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode.
The integrated module, if implemented in the form of a software functional module and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (8)
1. A high accuracy clock synchronization system based on 5G, its characterized in that: the system comprises a plurality of time synchronization devices and a data center; the data center comprises a clock generation circuit and a 5G communication circuit, wherein the clock generation circuit generates a clock synchronization signal according to a clock signal received by the 5G communication circuit and from the outside, and sends the clock synchronization signal to the plurality of time synchronization devices through the 5G communication circuit; the time synchronization device comprises a 5G module, a control module and a clock synchronization module, wherein the 5G module is connected with the control module, the control module is connected with the clock synchronization module, the 5G module is used for receiving a clock synchronization signal sent by a data center and sending the clock synchronization signal to the control module for processing, the control module adjusts the clock synchronization signal according to communication delay between the data center and the time synchronization device and sends the adjusted clock synchronization signal to the clock synchronization module, and the clock synchronization module synchronizes a clock of the power equipment according to the received clock synchronization signal.
2. The 5G-based high precision clock synchronization system of claim 1, wherein: the time synchronization device further comprises a power supply module, the power supply module is connected with the 5G module, the control module and the clock synchronization module, and the power supply module supplies power to the 5G module, the control module and the clock synchronization module.
3. The 5G-based high precision clock synchronization system of claim 2, wherein: the power supply module comprises a voltage reduction module, a comparison switch module, a first voltage division module, a second voltage division module and an output module, wherein the comparison switch module comprises a first input end, a second input end and an output end; the voltage reduction module is connected with an external power supply and is connected with a first input end of the comparison switch module through the first voltage division module, a second input end of the comparison switch module is connected with the external power supply through the second voltage division module, an output end of the comparison switch module is connected with the output module, and the output module is connected with the 5G module, the control module and the clock synchronization module.
4. The 5G-based high precision clock synchronization system of claim 3, wherein: the voltage reduction module comprises a voltage stabilizing circuit and a linear voltage stabilizer, the voltage stabilizing circuit is connected with the external power supply and the linear voltage stabilizer, and the linear voltage stabilizer is connected with the first input end of the comparison switch module through the first voltage division module.
5. The 5G-based high precision clock synchronization system of claim 2, wherein: the 5G communication circuit comprises a signal input circuit, a first Ethernet controller circuit, a second Ethernet controller circuit, a WAN interface circuit, a SIM card circuit, a conversion interface, a memory circuit, a microprocessor, a wireless transceiver and a radio frequency front-end circuit, said signal input circuit being connected to said clock generation circuit, said signal input circuit, said WAN interface circuit, said switch interface, and said first ethernet controller circuit all being electrically connected to said second ethernet controller circuit, the first Ethernet controller circuit, the SIM card circuit and the memory circuit are all electrically connected with the conversion interface, a first port of the rf front-end circuit is electrically connected to the memory circuit via the microprocessor, the second port of the rf front-end circuit is electrically connected to the memory circuit via the wireless transceiver.
6. The 5G-based high precision clock synchronization system of claim 2, wherein: the 5G module comprises a main circuit board, a 5G antenna and a 5G frequency multiplication suppression circuit, the 5G frequency multiplication suppression circuit is connected between the main circuit board and the 5G antenna and used for suppressing 5G frequency multiplication signals, and the main circuit board is connected with the control module.
7. The 5G-based high precision clock synchronization system of claim 6, wherein: the 5G frequency doubling suppression circuit comprises a first resonant circuit, a second resonant circuit and an intermediate capacitor, one end of the first resonant circuit is used for being connected with the main circuit board, the other end of the first resonant circuit is connected with one end of the intermediate capacitor, the other end of the intermediate capacitor is connected with one end of the second resonant circuit, and the other end of the second resonant circuit is used for being connected with a 5G antenna.
8. A5G-based high precision clock synchronization system according to any one of claims 1 to 7, characterized in that: the control module comprises at least one of a single chip microcomputer chip, a DSP chip, an ARM chip and an FPGA chip.
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