CN115903438A - Method, device and equipment for time synchronization of B code and readable medium - Google Patents
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Abstract
The invention provides a method, a device, equipment and a readable medium for time synchronization of B codes, wherein the method comprises the following steps: b code signals are sent to a single chip microcomputer for preprocessing through time service equipment, and B code pulse signals and B code data obtained after preprocessing are respectively transmitted to a linux system; responding to the triggering interruption of the B code pulse signal, and performing dislocation compensation on the B code pulse signal and the B code data; acquiring a difference value between the compensated B code time and the current system time, and comparing the difference value with a threshold value; and synchronizing the B code time to the current system time information in response to the difference value being less than the threshold value. By using the scheme of the invention, time service with higher precision can be carried out under the condition that the quality of the B code signal is relatively poor, and the time service of user-level software can be realized without being limited to different hardware, so that the method has the advantage of strong transportability.
Description
Technical Field
The present invention relates to the field of computers, and more particularly, to a method, an apparatus, a device, and a readable medium for B code time synchronization.
Background
The B code time synchronization technology is widely applied to the industrial control industry, particularly the electric power field. In time synchronization, in order to improve the accuracy of B code time synchronization, time synchronization is usually performed by using an embedded or hard interrupt method. The high-precision clock chip can ensure the precision of the hardware clock of the server. The accidental error caused by the reasons of system scheduling and the like can occur in the time synchronization mode under the operating system, so that the time synchronization of the B code signal is not accurate enough.
Disclosure of Invention
In view of this, embodiments of the present invention provide a method, an apparatus, a device, and a readable medium for timing a B code, which can perform timing with high precision under the condition that the quality of a B code signal is relatively poor, and can implement timing of user-level software without being limited to different hardware, and have the advantage of strong portability.
In view of the above, an aspect of the embodiments of the present invention provides a method for B code pair, including the following steps:
b code signals are sent to a single chip microcomputer for preprocessing through time service equipment, and B code pulse signals and B code data obtained after preprocessing are respectively transmitted to a linux system;
responding to the triggering interruption of the B code pulse signal, and performing dislocation compensation on the B code pulse signal and the B code data;
acquiring a difference value between the compensated B code time and the current system time, and comparing the difference value with a threshold value;
and synchronizing the B code time to the current system time in response to the difference being less than the threshold.
According to one embodiment of the present invention, the performing the misalignment compensation on the B-code pulse signal and the B-code data in response to the B-code pulse signal triggering an interrupt includes:
responding to the triggering interruption of the B code pulse signal, and taking out the B code data corresponding to the B code pulse signal from the queue through a time-setting service under the linux system;
and analyzing the B code pulse signal and the B code data, and performing dislocation compensation.
According to an embodiment of the present invention, obtaining a difference between the compensated B-code time and the current system time, and comparing the difference with a threshold comprises:
comparing the compensated B code time with the current system time to obtain a difference value, wherein the difference value is the error of the up-down fluctuation generated in the B code time or the transmission process;
the difference is compared to a threshold.
According to an embodiment of the present invention, further comprising:
in response to the difference being greater than the threshold, the B-code time is ignored.
In another aspect of the embodiments of the present invention, there is also provided an apparatus for B code pair, the apparatus including:
the processing module is configured to send the B code signal to the single chip microcomputer for preprocessing through the time service equipment, and transmit the B code pulse signal and the B code data obtained after preprocessing to the linux system respectively;
the compensation module is configured to respond to the triggering interruption of the B code pulse signal and perform dislocation compensation on the B code pulse signal and the B code data;
the comparison module is configured to obtain a difference value between the compensated B code time and the current system time, and compare the difference value with a threshold value;
a synchronization module configured to synchronize the B-code time to a current system time in response to the difference being less than a threshold.
According to one embodiment of the invention, the compensation module is further configured to:
responding to the triggering interruption of the B code pulse signal, and taking out the B code data corresponding to the B code pulse signal from the queue through a time-setting service under the linux system;
and analyzing the B code pulse signal and the B code data, and performing dislocation compensation.
According to one embodiment of the invention, the comparison module is further configured to:
comparing the compensated B code time with the current system time to obtain a difference value, wherein the difference value is the error of the up-down fluctuation generated in the B code time or the transmission process;
the difference is compared to a threshold.
According to an embodiment of the invention, further comprising an ignoring module configured to:
in response to the difference being greater than the threshold, the B-code time is ignored.
In another aspect of an embodiment of the present invention, there is also provided a computer apparatus including:
at least one processor; and
a memory storing computer instructions executable on the processor, the instructions when executed by the processor implementing the steps of any of the methods described above.
In another aspect of the embodiments of the present invention, there is also provided a computer-readable storage medium storing a computer program, which when executed by a processor implements the steps of any one of the above-mentioned methods.
The invention has the following beneficial technical effects: according to the method for time synchronization of the B code, the B code signal is sent to the single chip microcomputer for preprocessing through the time service equipment, and the B code pulse signal and the B code data obtained after preprocessing are respectively transmitted to the linux system; responding to the triggering interruption of the B code pulse signal, and performing dislocation compensation on the B code pulse signal and the B code data; acquiring a difference value between the compensated B code time and the current system time, and comparing the difference value with a threshold value; the technical scheme of synchronizing the B code time to the current system time in response to the difference value being smaller than the threshold value can perform time service with higher precision under the condition that the quality of the B code signal is relatively poor, can realize that user-level software is not limited to different hardware when performing time service, and has the advantage of strong transportability.
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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 it is obvious for those skilled in the art that other embodiments can be obtained by using the drawings without creative efforts.
FIG. 1 is a schematic flow chart diagram of a method of B-code pairing in accordance with one embodiment of the present invention;
FIG. 2 is a diagram of an apparatus for B-code pairing according to one embodiment of the present invention;
FIG. 3 is a schematic diagram of a computer device according to one embodiment of the present invention;
fig. 4 is a schematic diagram of a computer-readable storage medium according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the following embodiments of the present invention are described in further detail with reference to the accompanying drawings.
In view of the above object, a first aspect of the embodiments of the present invention provides an embodiment of a method for B code pair. Fig. 1 shows a schematic flow diagram of the method.
As shown in fig. 1, the method may comprise the steps of:
s1, sending the B code signal to a single chip microcomputer for preprocessing through a time service device, and respectively transmitting the B code pulse signal and the B code data obtained after preprocessing to a linux system. The time service equipment sends the B code signal to the singlechip, and the B code pulse signal and the B code data are transmitted through the program processing of the singlechip. The B code pulse signals are transmitted to the linux system at an interval of 1s in an interrupt mode and are the basis for high-precision time synchronization of software, the B code data correspond to the B code pulse signals one by one and are transmitted to the linux system through the serial port in sequence, and the problem of corresponding relation dislocation can be caused because the two pulse signals are transmitted in different processes and different transmission times.
S2, responding to the trigger interrupt of the B code pulse signal, and carrying out dislocation compensation on the B code pulse signal and the B code data. After the trigger interruption of the B code pulse signal, the time synchronization service in the linux system takes out a piece of B code data corresponding to the B code pulse signal from the queue, analyzes the B code data and compensates the dislocation, wherein the compensation value can be determined through testing and is a relatively fixed time difference value. Under the condition that the precision of the received B code signal is relatively low, the time synchronization precision of the B code can be corrected according to the time keeping precision of the system clock and the time keeping precision of the B code can be corrected according to the time keeping precision of the system with higher precision. The adjtimex is a computer algorithm, can be used for adjusting the system time-keeping precision, can obtain optimal parameters by using an adjtimex tool to perform multiple tests, and improves the system time-keeping precision.
And S3, acquiring a difference value between the compensated B code time and the current system time, and comparing the difference value with a threshold value.
And S4, responding to the difference value smaller than the threshold value, and synchronizing the time of the B code to the current system time. And comparing the compensated B code time with the current system time to obtain a difference value, wherein the difference value is an up-down fluctuation error generated in the B code time or the transmission process. If the difference value is within the allowable range, namely is smaller than the threshold value, the received B code time is synchronized to the current system in normal time setting, and if the difference value is beyond the range, namely is larger than the threshold value, the B code time is disregarded. In addition to this time, the B-code data also contains data related to B-code management, such as positive and negative leap seconds, check, jump seconds, etc., which are not related to time synchronization accuracy and will not be discussed in detail here.
The method can be implemented by constructing a system for carrying out high-precision B code time synchronization in a linux user state, wherein the system comprises time service equipment, an FPGA chip, a serial port and a system time synchronization program. The time service equipment is connected with the FPGA chip and sends the B code signal to the FPGA chip for pretreatment; the FPGA chip respectively sends the B code time pulse and the B code time data to a time synchronization program under the system through two serial ports according to the preprocessed signals; and after receiving the processed B code time pulse, the time synchronization program under the system takes out the received and stored B code time data in the queue, compares the received and stored B code time data with the current system time, and corrects the time data if the time synchronization program exceeds the allowable range of errors per second.
By the technical scheme, time service with high precision can be performed under the condition that the quality of the B code signal is relatively poor, user-level software can be subjected to time service without being limited to different hardware, and the method has the advantage of high transportability.
In a preferred embodiment of the present invention, the performing the skew compensation of the B-code pulse signal and the B-code data in response to the B-code pulse signal triggering the interrupt comprises:
responding to the trigger interrupt of the B code pulse signal, and taking out the B code data corresponding to the B code pulse signal from the queue through a time-setting service under the linux system;
and analyzing the B code pulse signal and the B code data, and performing dislocation compensation.
In a preferred embodiment of the present invention, obtaining a difference between the compensated B-code time and the current system time, and comparing the difference with the threshold comprises:
comparing the compensated B code time with the current system time to obtain a difference value, wherein the difference value is the error of the up-down fluctuation generated in the B code time or the transmission process;
the difference is compared to a threshold.
In a preferred embodiment of the present invention, the method further comprises:
in response to the difference being greater than the threshold, the B-code time is ignored.
By the technical scheme, time service with high precision can be performed under the condition that the quality of the B code signal is relatively poor, user-level software can be subjected to time service without being limited to different hardware, and the method has the advantage of high transportability.
It should be noted that, as will be understood by those skilled in the art, all or part of the processes in the methods of the above embodiments may be implemented by instructing relevant hardware through a computer program, and the above programs may be stored in a computer-readable storage medium, and when executed, the programs may include the processes of the embodiments of the methods as described above. The storage medium may be a magnetic disk, an optical disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), or the like. The embodiments of the computer program may achieve the same or similar effects as any of the above-described method embodiments.
Furthermore, the method disclosed according to an embodiment of the present invention may also be implemented as a computer program executed by a CPU, and the computer program may be stored in a computer-readable storage medium. The computer program, when executed by the CPU, performs the above-described functions defined in the method disclosed in the embodiments of the present invention.
In view of the above object, according to a second aspect of the embodiments of the present invention, there is provided an apparatus for B-code pair, as shown in fig. 2, the apparatus 200 includes:
the processing module is configured to send the B code signal to the single chip microcomputer for preprocessing through the time service equipment, and transmit the B code pulse signal and the B code data obtained after preprocessing to the linux system respectively;
the compensation module is configured to respond to the triggering interruption of the B code pulse signal and perform dislocation compensation on the B code pulse signal and the B code data;
the comparison module is configured to acquire a difference value between the compensated B code time and the current system time, and compare the difference value with a threshold value;
a synchronization module configured to synchronize the B-code time to a current system time in response to the difference being less than a threshold.
In a preferred embodiment of the invention, the compensation module is further configured to:
responding to the triggering interruption of the B code pulse signal, and taking out the B code data corresponding to the B code pulse signal from the queue through a time-setting service under the linux system;
and analyzing the B code pulse signal and the B code data, and performing dislocation compensation.
In a preferred embodiment of the present invention, the comparison module is further configured to:
comparing the compensated B code time with the current system time to obtain a difference value, wherein the difference value is the error of the up-down fluctuation generated in the B code time or the transmission process;
the difference is compared to a threshold.
In a preferred embodiment of the present invention, the apparatus further comprises an ignoring module configured to:
in response to the difference being greater than the threshold, the B-code time is ignored.
In view of the above object, a third aspect of the embodiments of the present invention provides a computer device. Fig. 3 is a schematic diagram of an embodiment of a computer device provided by the present invention. As shown in fig. 3, an embodiment of the present invention includes the following means: at least one processor 21; and a memory 22, the memory 22 storing computer instructions 23 executable on the processor, the instructions when executed by the processor implementing the method of:
b code signals are sent to a single chip microcomputer for preprocessing through time service equipment, and B code pulse signals and B code data obtained after preprocessing are respectively transmitted to a linux system;
responding to the triggering interruption of the B code pulse signal, and performing dislocation compensation on the B code pulse signal and the B code data;
acquiring a difference value between the compensated B code time and the current system time, and comparing the difference value with a threshold value;
and synchronizing the B code time to the current system time in response to the difference being less than the threshold.
In a preferred embodiment of the present invention, the performing the misalignment compensation on the B-code pulse signal and the B-code data in response to the B-code pulse signal triggering an interrupt comprises:
responding to the triggering interruption of the B code pulse signal, and taking out the B code data corresponding to the B code pulse signal from the queue through a time-setting service under the linux system;
and analyzing the B code pulse signal and the B code data, and performing dislocation compensation.
In a preferred embodiment of the present invention, obtaining a difference between the compensated B-code time and the current system time, and comparing the difference with the threshold comprises:
comparing the compensated B code time with the current system time to obtain a difference value, wherein the difference value is the error of the up-down fluctuation generated in the B code time or the transmission process;
the difference is compared to a threshold.
In a preferred embodiment of the present invention, further comprising:
in response to the difference being greater than the threshold, the B-code time is ignored.
In view of the above object, a fourth aspect of the embodiments of the present invention proposes a computer-readable storage medium. FIG. 4 is a schematic diagram illustrating an embodiment of a computer-readable storage medium provided by the present invention. As shown in fig. 4, the computer-readable storage medium 31 stores a computer program 32 which, when executed by a processor, performs the method as described above.
Furthermore, the methods disclosed according to embodiments of the present invention may also be implemented as a computer program executed by a processor, which may be stored in a computer-readable storage medium. Which when executed by a processor performs the above-described functions defined in the methods disclosed in embodiments of the invention.
Further, the above method steps and system elements may also be implemented using a controller and a computer readable storage medium for storing a computer program for causing the controller to implement the functions of the above steps or elements.
Those of skill would further appreciate that the various illustrative logical blocks, modules, circuits, and algorithm steps described in connection with the disclosure herein may be implemented as electronic hardware, computer software, or combinations of both. To clearly illustrate this interchangeability of hardware and software, various illustrative components, blocks, modules, circuits, and steps have been described above generally in terms of their functionality. Whether such functionality is implemented as software or hardware depends upon the particular application and design constraints imposed on the overall system. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the disclosed embodiments of the present invention.
In one or more exemplary designs, the functions may be implemented in hardware, software, firmware, or any combination thereof. If implemented in software, the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Computer-readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. A storage media may be any available media that can be accessed by a general purpose or special purpose computer. By way of example, and not limitation, such computer-readable media can comprise RAM, ROM, EEPROM, CD-ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a general-purpose or special-purpose computer, or a general-purpose or special-purpose processor. Also, any connection is properly termed a computer-readable medium. For example, if the software is transmitted from a website, server, or other remote source using a coaxial cable, fiber optic cable, twisted pair, digital Subscriber Line (DSL), or wireless technologies such as infrared, radio, and microwave, then the coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio, and microwave are included in the definition of medium. Disk and disc, as used herein, includes Compact Disc (CD), laser disc, optical disc, digital Versatile Disc (DVD), floppy disk, blu-ray disc where disks usually reproduce data magnetically, while discs reproduce data optically with lasers. Combinations of the above should also be included within the scope of computer-readable media.
The foregoing is an exemplary embodiment of the present disclosure, but it should be noted that various changes and modifications could be made herein without departing from the scope of the present disclosure as defined by the appended claims. The functions, steps and/or actions of the method claims in accordance with the disclosed embodiments described herein need not be performed in any particular order. Furthermore, although elements of the disclosed embodiments of the invention may be described or claimed in the singular, the plural is contemplated unless limitation to the singular is explicitly stated.
It should be understood that, as used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly supports the exception. It should also be understood that "and/or" as used herein is meant to include any and all possible combinations of one or more of the associated listed items.
The numbers of the embodiments disclosed in the embodiments of the present invention are merely for description, and do not represent the merits of the embodiments.
It will be understood by those skilled in the art that all or part of the steps for implementing the above embodiments may be implemented by hardware, or may be implemented by a program instructing relevant hardware, and the program may be stored in a computer-readable storage medium, and the above-mentioned storage medium may be a read-only memory, a magnetic disk or an optical disk, etc.
Those of ordinary skill in the art will understand that: the discussion of any embodiment above is meant only to be exemplary, and is not intended to intimate that the scope of the disclosure, including the claims, is limited to these examples; within the idea of an embodiment of the invention, also combinations between technical features in the above embodiments or in different embodiments are possible, and there are many other variations of the different aspects of the embodiments of the invention as described above, which are not provided in detail for the sake of brevity. Therefore, any omissions, modifications, substitutions, improvements, and the like that may be made without departing from the spirit and principles of the embodiments of the present invention are intended to be included within the scope of the embodiments of the present invention.
Claims (10)
1. A method for B code time pairing, comprising the steps of:
b code signals are sent to a single chip microcomputer for preprocessing through time service equipment, and B code pulse signals and B code data obtained after preprocessing are respectively transmitted to a linux system;
responding to the triggering interruption of the B code pulse signal, and performing dislocation compensation on the B code pulse signal and the B code data;
acquiring a difference value between the compensated B code time and the current system time, and comparing the difference value with a threshold value;
and synchronizing the B code time to the current system time in response to the difference being less than the threshold.
2. The method of claim 1, wherein the performing the misalignment compensation on the B-code pulse signal and the B-code data in response to the B-code pulse signal triggering an interrupt comprises:
responding to the triggering interruption of the B code pulse signal, and taking out the B code data corresponding to the B code pulse signal from the queue through a time-setting service under the linux system;
and analyzing the B code pulse signal and the B code data, and performing dislocation compensation.
3. The method of claim 1, wherein obtaining a difference between the compensated B-code time and the current system time, and comparing the difference to a threshold comprises:
comparing the compensated B code time with the current system time to obtain a difference value, wherein the difference value is the error of the up-down fluctuation generated in the B code time or the transmission process;
the difference is compared to a threshold.
4. The method of claim 1, further comprising:
in response to the difference being greater than the threshold, the B-code time is ignored.
5. An apparatus for B-code pairing, the apparatus comprising:
the processing module is configured to send the B code signal to the single chip microcomputer for preprocessing through the time service equipment, and respectively transmit the B code pulse signal and the B code data obtained after preprocessing to the linux system;
the compensation module is configured to respond to the trigger interrupt of the B code pulse signal and carry out dislocation compensation on the B code pulse signal and the B code data;
the comparison module is configured to obtain a difference value between the compensated B code time and the current system time, and compare the difference value with a threshold value;
a synchronization module configured to synchronize the B-code time to a current system time in response to the difference being less than a threshold.
6. The apparatus of claim 5, wherein the compensation module is further configured to:
responding to the trigger interrupt of the B code pulse signal, and taking out the B code data corresponding to the B code pulse signal from the queue through a time-setting service under the linux system;
and analyzing the B code pulse signal and the B code data, and performing dislocation compensation.
7. The apparatus of claim 5, wherein the comparison module is further configured to:
comparing the compensated B code time with the current system time to obtain a difference value, wherein the difference value is the error of the up-down fluctuation generated in the B code time or the transmission process;
the difference is compared to a threshold.
8. The apparatus of claim 5, further comprising an ignore module configured to:
in response to the difference being greater than the threshold, the B-code time is ignored.
9. A computer device, comprising:
at least one processor; and
a memory storing computer instructions executable on the processor, the instructions when executed by the processor implementing the steps of the method of any one of claims 1 to 4.
10. A computer-readable storage medium, in which a computer program is stored which, when being executed by a processor, carries out the steps of the method according to any one of claims 1 to 4.
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