CN112379587A - Ocean node time service system and time service method - Google Patents
Ocean node time service system and time service method Download PDFInfo
- Publication number
- CN112379587A CN112379587A CN202011193622.2A CN202011193622A CN112379587A CN 112379587 A CN112379587 A CN 112379587A CN 202011193622 A CN202011193622 A CN 202011193622A CN 112379587 A CN112379587 A CN 112379587A
- Authority
- CN
- China
- Prior art keywords
- signal
- time
- gps
- target
- time information
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 24
- 238000009826 distribution Methods 0.000 claims abstract description 35
- 230000001360 synchronised effect Effects 0.000 claims description 29
- 238000006243 chemical reaction Methods 0.000 claims description 6
- 238000003860 storage Methods 0.000 claims description 5
- 230000003321 amplification Effects 0.000 claims description 4
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 4
- 230000000630 rising effect Effects 0.000 claims description 4
- 230000003068 static effect Effects 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 11
- 238000004590 computer program Methods 0.000 description 7
- 230000006870 function Effects 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- 238000012546 transfer Methods 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 238000011161 development Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000002123 temporal effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Electric Clocks (AREA)
Abstract
The invention discloses a marine node time service system and a time service method, wherein the system comprises: the GPS signal distribution amplifier is used for receiving an off-the-air GPS signal, and the off-the-air GPS signal comprises time information; amplifying and outputting the wireless GPS signal; the GPS time service controller is connected with the GPS signal distribution amplifier and used for receiving the wireless GPS signal transmitted by the GPS signal distribution amplifier; extracting time information contained in the wireless GPS signal; generating a time information signal, and synchronously generating a pulse per second signal according to the time information; converting the time information signal and the pulse per second signal into a target time information signal and a target pulse per second signal of a specified level; and the ocean node equipment is connected with the GPS time service controller and is used for determining the current time according to the received target time information signal and the target pulse-per-second signal. The invention can realize accurate time service of the ocean node equipment.
Description
Technical Field
The invention relates to the technical field of marine seismic exploration and acquisition, in particular to a marine node time service system and a time service method.
Background
This section is intended to provide a background or context to the embodiments of the invention that are recited in the claims. The description herein is not admitted to be prior art by inclusion in this section.
In recent years, Ocean Node (OBN) equipment is becoming the mainstream collection equipment for offshore exploration, and the business development prospect is huge, and the annual growth rate is kept at about 20%. The marine node equipment is a seismic data acquisition unit which can independently sample and locally store a plurality of components (3-component land detection + 1-component piezoelectric); the ocean node devices are connected without cables, so that the problem of data transmission among nodes does not exist; the ocean node seismic system has higher flexibility, is convenient to arrange and recover, can meet the exploration requirements of high density and high coverage times, obtains all-dimensional high-fidelity data, and improves the seismic acquisition imaging quality. The operation mode based on the ocean node equipment has easy operability and relatively small safety risk, and is an important development trend of ocean exploration.
The ocean node equipment realizes the continuous acquisition and storage of seismic data and meets the application requirements of high-precision and high-density seismic exploration on large-channel and ultra-large-channel seismic acquisition. The accurate synchronous acquisition of the marine node equipment is a core technology of node control, and a time service technology is a foundation of the synchronous acquisition of the marine node equipment. At present, network time service is generally adopted by ocean node equipment, but due to the fact that transmission delay exists in a local area network, the realization of accurate time service of nodes in the local area network is also challenging.
Disclosure of Invention
The embodiment of the invention provides a marine node time service system, which is used for realizing accurate time service of marine node equipment and comprises the following steps:
the GPS signal distribution amplifier is used for receiving an off-the-air GPS signal, and the off-the-air GPS signal comprises time information; amplifying and outputting the wireless GPS signal;
the GPS time service controller is connected with the GPS signal distribution amplifier and used for receiving the wireless GPS signal transmitted by the GPS signal distribution amplifier; extracting time information contained in the wireless GPS signal; generating a time information signal, and synchronously generating a pulse per second signal according to the time information; converting the time information signal and the pulse per second signal into a target time information signal and a target pulse per second signal of a specified level;
and the ocean node equipment is connected with the GPS time service controller and is used for determining the current time according to the received target time information signal and the target pulse-per-second signal.
The embodiment of the invention also provides a marine node time service method, which is used for realizing accurate time service of marine node equipment and is applied to a GPS time service controller in a marine node time service system, and the method comprises the following steps:
receiving an off-the-air GPS signal output by a GPS signal distribution amplifier, wherein the off-the-air GPS signal comprises time information;
extracting time information contained in the wireless GPS signal;
generating a time information signal, and synchronously generating a pulse per second signal according to the time information;
converting the time information signal and the pulse per second signal into a target time information signal and a target pulse per second signal of a specified level;
and outputting the target time information and the target second pulse signal to the ocean node equipment so that the ocean node equipment can determine the current time according to the target time information signal and the target second pulse signal.
The embodiment of the invention also provides a marine node time service method, which is used for realizing accurate time service of marine node equipment and is applied to the marine node equipment in a marine node time service system, and the method comprises the following steps:
receiving a target time information signal and a target second pulse signal output by a GPS time service controller;
and determining the current time according to the target time information signal and the target pulse per second signal.
In the embodiment of the invention, a wireless GPS signal containing time information is received through a GPS signal distribution amplifier, a GPS time service controller receives the wireless GPS signal amplified by the GPS signal distribution amplifier, a target time information signal and a target pulse per second signal are generated according to the time information in the wireless GPS signal, and then ocean node equipment determines the current time according to the target time information signal and the target pulse per second signal. Compared with the prior art in which the marine node equipment adopts local area network time service, the time information provided by the wireless GPS signal is accurate, the precision of the pulse per second signal is high, the precision of the current time determined according to the wireless GPS signal and the pulse per second signal is high, the problem of accurate time service of the marine node equipment is solved, a time reference is established for accurate and synchronous acquisition of the nodes, and a foundation is laid for accurate time keeping and synchronization of acquisition control.
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, 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 the drawings without creative efforts. In the drawings:
FIG. 1 is a schematic structural diagram of a marine node time service system according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a GPS time service controller according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of an ocean node apparatus according to an embodiment of the present invention;
FIG. 4 is a flow chart of a marine node time service method according to an embodiment of the present invention;
FIG. 5 is a flowchart of another marine node time service method according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the embodiments of the present invention are further described in detail below with reference to the accompanying drawings. The exemplary embodiments and descriptions of the present invention are provided to explain the present invention, but not to limit the present invention.
An embodiment of the invention provides a marine node time service system, and as shown in fig. 1, the system comprises a GPS signal distribution amplifier, a GPS time service controller and marine node equipment.
The GPS signal distribution amplifier is used for receiving wireless GPS signals, and the wireless GPS signals contain time information; and amplifying and outputting the wireless GPS signal.
The GPS time service controller is connected with the GPS signal distribution amplifier and used for receiving the wireless GPS signal transmitted by the GPS signal distribution amplifier; extracting time information contained in the wireless GPS signal; generating a time information signal, and synchronously generating a pulse per second signal according to the time information; the time information signal and the pulse-per-second signal are converted into a target time information signal and a target pulse-per-second signal of a prescribed level.
And the ocean node equipment is connected with the GPS time service controller and is used for determining the current time according to the received target time information signal and the target pulse-per-second signal.
In the embodiment of the present invention, referring to fig. 1, the GPS signal distribution amplifier includes 1 antenna and 16 amplification output ports, where the antenna is used to receive the wireless GPS signals, and each of the 1 amplification output ports is used to output the amplified wireless GPS signals to 1 GPS time service controller. Thus, one GPS signal distribution amplifier can be connected with 16 GPS time service controllers and provides 16 paths of radio frequency input for the GPS time service controllers. However, it should be noted that, when performing time transfer, the GPS signal distribution amplifier may be connected to 1 to 16 GPS time transfer controllers, and the number of connected GPS time transfer controllers may be appropriately adjusted according to the number of marine node devices requiring time transfer.
The wireless GPS signal received by the antenna is an L1 waveband (1575.42MHz) GPS signal or an L2 waveband (1227.60MHz) GPS signal.
In the embodiment of the invention, the GPS time service controller is the core of a marine node time service system, and provides a GPS antenna interface to be connected with a GPS signal distribution amplifier on one hand and provides an interface to be connected with marine node equipment on the other hand. It is composed of GPS time receiving circuit, 16-channel drive circuit and interface circuit.
Referring to fig. 2, a GPS time receiving circuit, connected to a GPS signal distribution amplifier (not shown in fig. 2) and a 16-way driving circuit, for receiving an off-the-air GPS signal; extracting time information in the wireless GPS signal; and generating a time information signal, and synchronously generating a pulse per second signal according to the time information.
And the 16-path driving circuit is connected with the interface circuit and is used for converting the time information signal and the second pulse signal into 16-path time information signals and 16-path second pulse signals.
The interface circuit comprises 16 paths of I/O ports, is connected with the ocean node equipment and is used for converting the 16 paths of time information signals and the 16 paths of second pulse signals into 16 paths of target time information signals and 16 paths of target second pulse signals with specified levels; and each 1-path I/O port is used for outputting a target pulse-per-second signal and a target time information signal to 1 ocean node device.
It should be noted that, after time service is started and before time service is successful, the GPS time service controller continuously sends a pulse-per-second signal to the marine node device every 1 second, so that the marine node device determines the current time according to the pulse-per-second signal. The pulse per second signal is used as the external interrupt input of the singlechip, so that the response speed of the singlechip is improved.
In addition, the GPS time service controller also comprises 16 status indicator lamps. Each state indicator lamp corresponds to the time service state of one ocean node device; when the time service state fed back by the ocean node equipment is received, displaying light corresponding to the time service state; the time service state comprises the time service and the success of the time service. For example, the status indicator light can flash to indicate that the marine node device is time service, and the status indicator light is always on to indicate that the marine node device is time service successfully. The specific light corresponds to the time service state, and may be set by the user, and the specific form is not limited herein.
It should also be noted that the interface circuit provides 16I/O ports, and can be connected with 16 marine node devices at most, but when it is used, the number of connected marine node devices can be between 1 and 16, and the corresponding number of I/O ports is selected according to the number of marine node devices. The number of the working status indicator lamps is the same as the specific number of the connected ocean node devices.
The GPS signal distribution amplifier in the embodiment of the invention can be connected with 16 GPS time service controllers, each GPS time service controller can be connected with 16 marine node devices, that is, a marine node time service system comprising 1 GPS signal distribution amplifier can support 256 marine node devices to synchronously time service in parallel, and the requirements of marine seismic exploration are completely met. In addition, the number of the parallel time service nodes can be further expanded according to a system architecture (for example, the number of GPS signal distribution amplifiers in the marine node time service system is increased), more nodes are supported to be synchronized and used in parallel, the objective requirement of high-efficiency acquisition of marine OBN (on-board diagnostics) services is met, and the operation efficiency of marine node exploration services is improved.
In the embodiment of the invention, the ocean node equipment comprises a single chip microcomputer with an embedded RTC real-time clock controller, a clock source, an FPGA and an RS232 level conversion circuit, wherein the FPGA comprises a frequency division controller and a synchronous controller.
Referring to fig. 3, the single chip microcomputer is connected with the GPS time service controller through an RS232 level conversion circuit, and is configured to receive a target time information signal synchronized with a target pulse per second signal; determining the current time according to the target pulse per second signal and the target time information signal;
a clock source connected with the FPGA for generating a first clock signal as a clock input of the FPGA, wherein the clock source has a frequency accuracy of at least 10-11Magnitude;
the frequency division controller is connected with the clock source, the synchronous controller and the RTC real-time clock controller and is used for generating a second clock signal according to the first clock signal and generating a 1PPS signal; inputting a second clock signal to the RTC real-time clock controller; inputting a 1PPS signal to a synchronous controller; wherein the frequency accuracy of the second clock signal is 32.768K.
A synchronous controller for controlling the rising edge of the 1PPS signal to be synchronous with the rising edge of the target pulse-per-second signal; inputting the synchronized 1PPS signal to the singlechip;
and the RTC real-time clock controller is used for storing the current time determined by the single chip microcomputer through time service, and automatically updating the time according to a second clock signal provided by the frequency division controller and the synchronized 1PPS signal provided by the synchronous controller so as to determine the time at any time after the time service is successful.
That is, when GPS time service is complete after the current time is determined, the time update in the RTC real time clock controller relies on the clock source (atomic clock, accuracy at least 10-11Magnitude) to maintain temporal refresh and retention of the system. The mechanism ensures that the time can still be maintained with high precision after the wireless GPS signals are lost underwater after the marine nodes are subjected to GPS time service, and the time precision is less than 1ms for one month.
The high-precision clock source can be calibrated before launching water, so that the time precision of the node after time service is ensured, and the requirement of marine exploration time precision is completely met.
The RTC real-time clock controller comprises an RTC time register, and the time of each moment is stored in the RTC time register.
The ocean node equipment also comprises an LED driving circuit; and the LED driving circuit is used for controlling a state indicator lamp of the GPS time service controller to display lamplight corresponding to the time service state under the control of the FPGA.
In one implementation, I/O communication is performed between the FPGA and the single chip via a Flexible Static Memory Controller (FSMC) bus.
The GPS time service controller communicates with a single chip microcomputer (an STM32 microcontroller is one of the single chip microcomputers in the figure 3) through an RS232 serial port, for example, a time information signal is sent or a time service state is fed back, and a target second pulse signal is input to the single chip microcomputer through a 1PPS synchronous serial port. The pulse-per-second signal and the time information signal of the GPS time service controller are output through an RS232 interface, and are converted into a UART interface to communicate with the single chip microcomputer after level conversion is carried out through an RS232 level conversion circuit in the ocean node equipment.
In the embodiment of the invention, a wireless GPS signal containing time information is received through a GPS signal distribution amplifier, a GPS time service controller receives the wireless GPS signal amplified by the GPS signal distribution amplifier, a target time information signal and a target pulse per second signal are generated according to the time information in the wireless GPS signal, and then ocean node equipment determines the current time according to the target time information signal and the target pulse per second signal. Compared with the prior art in which the marine node equipment adopts local area network time service, the time information provided by the wireless GPS signal is accurate, the precision of the pulse per second signal is high, the precision of the current time determined according to the wireless GPS signal and the pulse per second signal is high, the problem of accurate time service of the marine node equipment is solved, a time reference is established for accurate and synchronous acquisition of the nodes, and a foundation is laid for accurate time keeping and synchronization of acquisition control.
The embodiment of the invention also provides a marine node time service method, which is described in the following embodiment. The method is applied to the GPS time service controller in the marine node time service system described in the above embodiment, and the structure thereof is not described herein again.
As shown in fig. 4, the method includes steps 401 to 405:
Wherein, the wireless GPS signal comprises time information.
And 405, outputting the target time information and the target pulse per second signal to the ocean node equipment so that the ocean node equipment can determine the current time according to the target time information signal and the target pulse per second signal.
In the embodiment of the invention, a wireless GPS signal containing time information is received through a GPS signal distribution amplifier, a GPS time service controller receives the wireless GPS signal amplified by the GPS signal distribution amplifier, a target time information signal and a target pulse per second signal are generated according to the time information in the wireless GPS signal, and then ocean node equipment determines the current time according to the target time information signal and the target pulse per second signal. Compared with the prior art in which the marine node equipment adopts local area network time service, the time information provided by the wireless GPS signal is accurate, the precision of the pulse per second signal is high, the precision of the current time determined according to the wireless GPS signal and the pulse per second signal is high, the problem of accurate time service of the marine node equipment is solved, a time reference is established for accurate and synchronous acquisition of the nodes, and a foundation is laid for accurate time keeping and synchronization of acquisition control.
The embodiment of the invention also provides a marine node time service method, which is described in the following embodiment. The method is applied to the marine node device in the marine node time service system described in the above embodiment, and the structure thereof is not described herein again.
As shown in fig. 5, the method includes steps 501 to 502:
and step 501, receiving a target time information signal and a target pulse per second signal output by the GPS time service controller.
Specifically, determining the current time according to the target time information signal and the target pulse-per-second signal includes: acquiring time information contained in a target time information signal; when the nth target second pulse signal after the target second pulse signal is received, adding n seconds to the time indicated by the time information as the current time when the nth target second pulse signal is received.
Since there may be a certain delay in the transmission of the time information, and if the current time is directly added to the time information by 1, there may be a certain error.
In the embodiment of the invention, after the current time is determined, the RTC real-time clock controller automatically updates the time according to the 1PPS signal which is synchronized with the target pulse per second signal and the second clock signal which is generated by the frequency division controller according to the first clock signal generated by the clock source so as to determine the time at any moment after the time service is successful.
In the embodiment of the invention, a wireless GPS signal containing time information is received through a GPS signal distribution amplifier, a GPS time service controller receives the wireless GPS signal amplified by the GPS signal distribution amplifier, a target time information signal and a target pulse per second signal are generated according to the time information in the wireless GPS signal, and then ocean node equipment determines the current time according to the target time information signal and the target pulse per second signal. Compared with the prior art in which the marine node equipment adopts local area network time service, the time information provided by the wireless GPS signal is accurate, the precision of the pulse per second signal is high, the precision of the current time determined according to the wireless GPS signal and the pulse per second signal is high, the problem of accurate time service of the marine node equipment is solved, a time reference is established for accurate and synchronous acquisition of the nodes, and a foundation is laid for accurate time keeping and synchronization of acquisition control.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are only exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (13)
1. A marine node time service system, comprising:
the GPS signal distribution amplifier is used for receiving an off-the-air GPS signal, and the off-the-air GPS signal comprises time information; amplifying and outputting the wireless GPS signal;
the GPS time service controller is connected with the GPS signal distribution amplifier and used for receiving the wireless GPS signal transmitted by the GPS signal distribution amplifier; extracting time information contained in the wireless GPS signal; generating a time information signal, and synchronously generating a pulse per second signal according to the time information; converting the time information signal and the pulse per second signal into a target time information signal and a target pulse per second signal of a specified level;
and the ocean node equipment is connected with the GPS time service controller and is used for determining the current time according to the received target time information signal and the target pulse-per-second signal.
2. The system of claim 1,
the GPS signal distribution amplifier comprises 1 path of antenna and 16 paths of amplification output ports, wherein the antenna is used for receiving wireless GPS signals, and each 1 path of amplification output port is used for outputting the amplified wireless GPS signals to 1 GPS time service controller.
3. The system of claim 2, wherein the GPS time controller comprises a GPS time receiving circuit, a 16-way driving circuit and an interface circuit;
the GPS time receiving circuit is connected with the GPS signal distribution amplifier and the 16-path driving circuit and is used for receiving GPS signals; extracting time information in the GPS signal; generating a time information signal, and synchronously generating a pulse per second signal according to the time information;
the 16-path driving circuit is connected with the interface circuit and is used for converting the time information signals and the second pulse signals into 16-path time information signals and 16-path second pulse signals;
the interface circuit comprises 16 paths of I/O ports, is connected with the ocean node equipment and is used for converting the 16 paths of time information signals and the 16 paths of second pulse signals into 16 paths of target time information signals and 16 paths of target second pulse signals with specified levels; and each 1-path I/O port is used for outputting a target pulse-per-second signal and a target time information signal to 1 ocean node device.
4. The system according to claim 2 or 3, wherein the GPS time service controller further comprises 16 status indicator lamps, and each status indicator lamp corresponds to one marine node device; when the time service state fed back by the ocean node equipment is received, displaying light corresponding to the time service state; the time service state comprises the time service and the success of the time service.
5. The system of claim 1, wherein the GPS signal received by the GPS signal distribution amplifier is a L1 band GPS signal or a L2 band GPS signal.
6. The system of claim 1, wherein the marine node device comprises a single chip with an embedded RTC real-time clock controller, a clock source, a field programmable gate array FPGA and an RS232 level conversion circuit, wherein the FPGA comprises a frequency division controller and a synchronous controller; wherein,
the single chip microcomputer is connected with the GPS time service controller through an RS232 level conversion circuit and used for receiving a target time information signal synchronous with a target second pulse signal; determining the current time according to the target pulse per second signal and the target time information signal;
a clock source connected with the FPGA for generating a first clock signal as a clock input of the FPGA, wherein the clock source has a frequency accuracy of at least 10-11Magnitude;
the frequency division controller is connected with the clock source, the synchronous controller and the RTC real-time clock controller and is used for generating a second clock signal according to the first clock signal and generating a 1PPS signal; inputting a second clock signal to the RTC real-time clock controller; inputting a 1PPS signal to a synchronous controller;
a synchronous controller for controlling the rising edge of the 1PPS signal to be synchronous with the rising edge of the target pulse-per-second signal; inputting the synchronized 1PPS signal to the singlechip;
and the RTC real-time clock controller is used for storing the current time determined by the single chip microcomputer through time service, and automatically updating the time according to a second clock signal provided by the frequency division controller and the synchronized 1PPS signal provided by the synchronous controller so as to determine the time at any time after the time service is successful.
7. The system of claim 6, wherein the marine node device further comprises an LED drive circuit; and the LED driving circuit is used for controlling a state indicator lamp of the GPS time service controller to display lamplight corresponding to the time service state under the control of the FPGA.
8. The system of claim 6, wherein the FPGA communicates with the single chip via a flexible static storage controller (FSMC) bus.
9. The system as claimed in claim 6, wherein the GPS time service controller communicates with the single chip microcomputer through an RS232 serial port, and inputs the target second pulse signal to the single chip microcomputer through a 1PPS synchronous serial port.
10. A marine node time service method, which is applied to a GPS time service controller in a marine node time service system according to any one of claims 1 to 9, and comprises the following steps:
receiving an off-the-air GPS signal output by a GPS signal distribution amplifier, wherein the off-the-air GPS signal comprises time information;
extracting time information contained in the wireless GPS signal;
generating a time information signal, and synchronously generating a pulse per second signal according to the time information;
converting the time information signal and the pulse per second signal into a target time information signal and a target pulse per second signal of a specified level;
and outputting the target time information and the target second pulse signal to the ocean node equipment so that the ocean node equipment can determine the current time according to the target time information signal and the target second pulse signal.
11. A marine node time service method, which is applied to a marine node device in a marine node time service system according to any one of claims 1 to 9, and comprises the following steps:
receiving a target time information signal and a target second pulse signal output by a GPS time service controller;
and determining the current time according to the target time information signal and the target pulse per second signal.
12. The method of claim 11, wherein determining the current time based on the target time information signal and the target pulse-per-second signal comprises:
acquiring time information contained in a target time information signal;
when the nth target second pulse signal after the target second pulse signal is received, adding n seconds to the time indicated by the time information as the current time when the nth target second pulse signal is received.
13. The method according to claim 11 or 12, wherein after determining the current time from the target time information signal and the target second pulse signal, the method further comprises:
and the RTC real-time clock controller automatically updates the time according to the 1PPS signal synchronized with the target pulse per second signal and the second clock signal generated by the frequency division controller according to the first clock signal generated by the clock source so as to determine the time at any moment after the time service is successful.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011193622.2A CN112379587A (en) | 2020-10-30 | 2020-10-30 | Ocean node time service system and time service method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011193622.2A CN112379587A (en) | 2020-10-30 | 2020-10-30 | Ocean node time service system and time service method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112379587A true CN112379587A (en) | 2021-02-19 |
Family
ID=74577512
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011193622.2A Pending CN112379587A (en) | 2020-10-30 | 2020-10-30 | Ocean node time service system and time service method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112379587A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115390429A (en) * | 2022-08-26 | 2022-11-25 | 中南大学 | Time service method and related equipment |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102023565A (en) * | 2010-12-15 | 2011-04-20 | 中兴通讯股份有限公司 | Device and method for outputting time information |
| CN202854337U (en) * | 2012-10-05 | 2013-04-03 | 吴承超 | Navigational satellite time service information transponder |
| CN203224727U (en) * | 2013-04-23 | 2013-10-02 | 欧阳明星 | Dual-clock source time service system based on radio communication network and GPS |
| CN105785119A (en) * | 2016-04-26 | 2016-07-20 | 国网冀北电力有限公司电力科学研究院 | Intelligent electric energy meter and method of utilizing Beidou satellite time service system to calibrate time automatically |
| CN107765546A (en) * | 2017-11-29 | 2018-03-06 | 山东航天电子技术研究所 | A kind of precise synchronization system and method based on GPS, BD and rubidium atomic clock |
| CN110456385A (en) * | 2019-07-11 | 2019-11-15 | 广州市杰汇信息科技有限公司 | One kind can cascade GPS signal distribution system |
-
2020
- 2020-10-30 CN CN202011193622.2A patent/CN112379587A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102023565A (en) * | 2010-12-15 | 2011-04-20 | 中兴通讯股份有限公司 | Device and method for outputting time information |
| CN202854337U (en) * | 2012-10-05 | 2013-04-03 | 吴承超 | Navigational satellite time service information transponder |
| CN203224727U (en) * | 2013-04-23 | 2013-10-02 | 欧阳明星 | Dual-clock source time service system based on radio communication network and GPS |
| CN105785119A (en) * | 2016-04-26 | 2016-07-20 | 国网冀北电力有限公司电力科学研究院 | Intelligent electric energy meter and method of utilizing Beidou satellite time service system to calibrate time automatically |
| CN107765546A (en) * | 2017-11-29 | 2018-03-06 | 山东航天电子技术研究所 | A kind of precise synchronization system and method based on GPS, BD and rubidium atomic clock |
| CN110456385A (en) * | 2019-07-11 | 2019-11-15 | 广州市杰汇信息科技有限公司 | One kind can cascade GPS signal distribution system |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115390429A (en) * | 2022-08-26 | 2022-11-25 | 中南大学 | Time service method and related equipment |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106526624B (en) | Satellite navigation signal simulator and simulation method thereof | |
| CN104849761B (en) | Pull detection system in a kind of acoustics deep-sea | |
| CN109884668B (en) | GNSS-R correlator device based on distributed computation and GNSS-R comprehensive detection device | |
| CN1550789A (en) | Passive position determination using low-earth orbit satellites | |
| US9897702B2 (en) | Generation of linear feedback shift register based pseudo random noise (PRN) spreading code sequence for global navigation satellite system | |
| CN110727004A (en) | Weil code generation method and device and storage medium | |
| CN102183771A (en) | Realizing method of multi-mode GNSS (Global Navigation Satellite System) software receiver based on multi-core processor | |
| EP3798682A1 (en) | Wavefront global navigation satellite system and interference simulator systems and methods of use thereof | |
| CN112379587A (en) | Ocean node time service system and time service method | |
| CA2494490A1 (en) | Controlling solution latency in a global navigation satellite receiver | |
| CN106685566A (en) | Clock source selection method and clock server | |
| CN115361086B (en) | Time synchronization method, device and medium for inter-satellite link | |
| CN106851551A (en) | A kind of location information acquisition method and device | |
| CN112564842B (en) | Control system timing method and device for railway vehicle | |
| US11055100B2 (en) | Processor, and method for processing information applied to processor | |
| CN112462395A (en) | Implementation method of low-cost multi-channel GNSS tracking integration engine | |
| CN103760577A (en) | GNSS satellite tracking method | |
| CN204777030U (en) | A reputation combination positioning system for warehouse system | |
| CN106134478B (en) | A kind of satellite constellation simulator control system and control method | |
| CN112398543A (en) | Method, apparatus, system, device and computer readable medium for optical communication | |
| US20240280710A1 (en) | Method for Position Determination by Tracking GNSS Satellites Using Vector Tracking Loops | |
| CN102045156A (en) | Method and device for multi-module synchronous processing of digital signals | |
| CN111158033A (en) | Differential positioning method, device, equipment and storage medium based on GNSS | |
| CN118838223A (en) | Sonar buoy monitoring method, system and storage medium | |
| KR20180137808A (en) | Method And Device For AltBOC Signal Processing |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210219 |
|
| RJ01 | Rejection of invention patent application after publication |