KR20200083533A - Clock metering method of watt hour meter, device, computer equipment and storage medium - Google Patents

Abstract

The present application relates to a power meter clock synchronization method, apparatus, computer equipment and storage medium. The method comprises: obtaining an absolute time and synchronizing an internal clock according to the absolute time; Transmitting a first time synchronization message to the watt hour meter at a first time by a preset communication protocol, and receiving a second time synchronization message fed back from the watt hour meter at the second time; Where the first time and the second time are the time of the internal clock; Obtaining a processing delay of a first time synchronization message according to the first time, the second time, and a transmission delay; Obtaining a correction time according to a processing delay, a transmission delay, a predetermined message assembly time, and a time of the internal clock; And synchronizing the local clock of the wattmeter by sending a time calibration message to the wattmeter, wherein the time calibration message includes a calibration time. The present invention uses an accurate clock source, and considers the transmission delay and processing delay of the message, so that the clock of the watt-hour meter can meet the demand in seconds.

Description

Clock metering method of watt hour meter, device, computer equipment and storage medium

The present application relates to the field of power system technology, and more particularly, to a clock synchronization method, apparatus, computer equipment and storage medium of a watt-hour meter.

There are many power meters for electric energy metering and event recording in power systems. Currently, the method of calculating the electric energy bill of the power system is mainly monthly payment, not real time. In such a non-real-time charge calculation system, the watt hour meter calculates power consumption for a relatively long time (typically in days and months) based on its own time, and periodically reads metering data of the electricity meter. In these working conditions, the time error of the watt hour meter is not sensitive.

In the current non-real-time rate calculation system, in order to ensure the accuracy of the watt-hour meter, it is possible to perform a point-to-point time synchronization by sending a time synchronization command from the electricity meter data collection master station. However, in such a time synchronization mechanism, the master station sends the electricity meter time to the concentrator or load control terminal, and the concentrator or load control terminal again sends a message containing the time to the watt hour meter, and the time synchronization is performed at the electricity meter. Will be. In this method, since there are various situations such as delay and retransmission of a message in a complex network through multiple stages of transmission, it is impossible to effectively synchronize the time of the watt-hour meter.

In addition, there is also a technical method in which the master station uses a method of performing time synchronization by transparently transmitting an electric meter time synchronization command through a load control terminal or a concentrator. However, because one master station generally manages tens to millions of electricity meters, it takes a long time to perform time error reading and send time calibration once for all electricity meters. Poor real-time performance.

With the development of the electricity business, the demand for real-time data collection of electric meter data is increasing. For example, in the power transaction, real-time data collection of electric meter data requires minute-by-minute accuracy. Should do. With the conventional time synchronization mechanism, it is impossible to synchronize the second unit with respect to the absolute time of a large-scale electricity meter.

In view of this, the clock synchronization method, device, computer equipment and storage medium of the watt hour meter, which can solve the problem that it is impossible to synchronize in seconds with respect to the absolute time of a large-scale watt hour meter, using the conventional time synchronization mechanism to solve the above technical problem Need to provide.

The wattmeter clock synchronization method,

Obtaining an absolute time and synchronizing an internal clock according to the absolute time;

Transmitting a first time synchronization message to the watt hour meter at a first time by a preset communication protocol, and receiving a second time synchronization message fed back from the watt hour meter at the second time; The first time and the second time are times of an internal clock;

Obtaining a processing delay of the first time synchronization message according to the first time, the second time, and a transmission delay; Obtaining a correction time according to the processing delay, transmission delay, predetermined message assembly time, and time of the internal clock; And

And sending a time calibration message to the watt hour meter to synchronize the local clock of the watt hour meter, wherein the time calibration message includes the calibration time.

The clock synchronizing method of the watt-hour meter achieves subsequent accurate timekeeping by obtaining an accurate absolute time and synchronizing the internal clock counter, transmitting a first time synchronization message at a first time by a preset communication protocol, and After receiving the 1 hour synchronization message, the second time synchronization message is fed back, the second time the second message is received is recorded, and the transmission delay of the message is combined to calculate the processing delay of the watt hour meter for the message, thereby The calibration time of the local clock of the watt hour meter can be calculated, and by sending a time calibration message to the watt hour meter, local clock synchronization of the watt hour meter is realized. An embodiment of the present invention uses an accurate clock source, and takes into account the transmission delay and processing delay of the message, so that the local clock of the watt hour meter can meet the demand in seconds.

In one embodiment, decompressing the second time synchronization message to obtain a third time of the local clock of the wattmeter; Obtaining a time error of the local clock of the watt hour meter according to the second time, the third time and the transmission delay; The method further includes determining whether the time error is within a preset time range and, accordingly, determining whether to synchronize the wattmeter with a local clock.

In one embodiment, the formula for calculating the time error of the local clock of the wattmeter is further included.

Here, dt0 represents the time error of the local clock of the watt-hour meter, T2 represents the second time, T3 represents the third time, and dt2 represents the transmission delay.

In one embodiment, through the watt hour communication protocol of the physical link, a first time synchronization message conforming to the watt hour communication protocol is transmitted to the watt hour meter at the first time, and a second time synchronization message compliant with the watt hour communication protocol fed back from the watt hour meter. And receiving at the second time.

In one embodiment, acquiring a first message length of the first time synchronization message and a baud rate of the physical link interface, and transmitting the first time synchronization message according to the first message length and the baud rate of the physical link interface Obtaining a delay; Obtaining a second message length of the second time synchronization message, and acquiring a transmission delay of the second time synchronization message according to the second message length and the baud rate of the physical link interface, wherein the first time The following formula is further included to calculate the processing delay of the synchronization message.

Here, dt1 represents the transmission delay of the first time synchronization message, dt2 represents the transmission delay of the second time synchronization message, T1 represents the first time, T2 represents the second time, and dt3 represents the first time synchronization Indicates the processing delay of the message.

In one embodiment, the message assembly time and the message length of the time calibration message are obtained in advance, the time according to the message length of the time calibration message, the baud rate of the physical link, and the coding length of the time calibration message on the communication link. Further comprising the step of obtaining the transmission delay of the calibration message, further includes the following formula for calculating the calibration time in the time calibration message.

Here, T5 represents the calibration time in the time calibration message, T4 represents the time at which the time calibration message recorded by the internal clock is transmitted, dt4 represents the transmission delay of the time calibration message, and dt5 is a predetermined message. Shows the assembly time.

In one embodiment, obtaining absolute time from one base station; Or obtaining times of a plurality of base stations and selecting one of the times of the plurality of base stations as the absolute time; Or, further comprising the step of acquiring the absolute time through the internal GPS module or the Beidou module.

The clock meter synchronization device,

An internal time synchronization module for obtaining an absolute time and synchronizing an internal clock according to the absolute time;

A message transmitting and receiving module for transmitting the first time synchronization message to the watt hour meter at a first time by a preset communication protocol and receiving the second time synchronization message fed back from the watt hour meter at the second time; The first time and the second time are times of an internal clock;

Acquire a processing delay of the first time synchronization message according to the first time, the second time, and a transmission delay; A delay calculation module for obtaining a correction time according to the processing delay, transmission delay, predetermined message assembly time, and time of the internal clock; And

And a clock synchronization module for synchronizing the local clock of the wattmeter by sending a time calibration message to the wattmeter, wherein the time calibration message includes the calibration time.

A computer facility including a memory and a processor, wherein a computer program is stored in the memory, and the computer program is executed by the processor.

Obtaining an absolute time and synchronizing an internal clock according to the absolute time;

Transmitting a first time synchronization message to the watt hour meter at a first time by a preset communication protocol, and receiving a second time synchronization message fed back from the watt hour meter at the second time; The first time and the second time are times of an internal clock;

Obtaining a processing delay of the first time synchronization message according to the first time, the second time, and a transmission delay; Obtaining a correction time according to the processing delay, transmission delay, predetermined message assembly time, and time of the internal clock; And

A step of synchronizing the local clock of the wattmeter is implemented by sending a time calibration message to the wattmeter, and the time calibration message includes the calibration time.

A computer-readable storage medium on which a computer program is stored, when the computer program is executed by a processor,

Obtaining an absolute time and synchronizing an internal clock according to the absolute time;

Transmitting a first time synchronization message to the watt hour meter at a first time by a preset communication protocol, and receiving a second time synchronization message fed back from the watt hour meter at the second time; The first time and the second time are times of an internal clock;

Obtaining a processing delay of the first time synchronization message according to the first time, the second time, and a transmission delay; Obtaining a correction time according to the processing delay, transmission delay, predetermined message assembly time, and time of the internal clock; And

And sending a time calibration message to the watt hour meter to synchronize the local clock of the watt hour meter, wherein the time calibration message includes the calibration time.

The above-described watt-hour clock synchronization method, apparatus, computer equipment, and storage medium use an accurate clock source, and consider transmission delay and processing delay of a message, so that the watt-hour meter can meet the demand in seconds.

1 is a view showing an application diagram of a clock synchronization method of a watt hour meter according to an embodiment.
2 is a view showing a flow chart of a clock synchronization method of the watt hour meter according to an embodiment.
3 is a view showing a flow chart of a clock synchronization method of a watt hour meter according to another embodiment.
4 is a view showing a first structure for obtaining an absolute time according to an embodiment.
5 is a view showing a second structure for acquiring absolute time according to an embodiment.
6 is a view showing a third structure for obtaining absolute time according to an embodiment.
7 is a sequence diagram of a clock synchronization method of a watt hour meter according to an embodiment.
8 is a structural block diagram of an apparatus for synchronizing clocks in a power meter according to an embodiment.
9 is an internal structure diagram of a computer facility according to an embodiment.

In order to more clearly understand the purpose, technical solutions and advantages of the present application, the present application will be described in more detail with reference to the accompanying drawings and examples. The specific embodiments described herein are only for describing the present application and are not to be understood as limiting the present application.

The clock synchronization method of the watt hour meter provided in the present application can be applied to an application diagram as shown in FIG. 1. Here, the watt-hour meter 102 communicates with the time synchronization terminal 104 through a preset communication protocol interface. Here, the watt-hour meter 102 may be an electronic watt-hour meter, an electric card prepaid watt-hour meter, etc., and the time synchronization terminal 104 may be a smartphone, a notebook computer, or the like having a preset communication protocol interface.

Here, a local clock for recording its own time is integrated in the wattmeter 102, and the time needs of the wattage service are provided through this local clock.

In addition, the time synchronization terminal 104 includes a GPS module or a North Head module for acquiring absolute time from the North Head or GPS, and also, if the time synchronization terminal 104 does not have a GPS module or the North Head module, through the communication module The absolute time may be obtained from one nearby base station or multiple base stations.

In one embodiment, as shown in FIG. 2, a clock synchronization method of a watt hour meter is provided, and the method is applied to the time synchronization terminal of FIG. 1 as an example, and includes the following steps:

Step S202: Acquire an absolute time and synchronize the internal clock according to the absolute time.

Here, the absolute time can be regarded as an accurate time, and in general, the absolute time is stored in the GPS system and the Beidou system.

Specifically, after the time synchronization terminal acquires the absolute time, the internal clock is synchronized using the absolute time, thereby guaranteeing the accuracy of the internal time of the time synchronization terminal.

Step S204: The first time synchronization message is transmitted to the watt hour meter at a first time by a preset communication protocol, and the second time synchronization message fed back from the watt hour meter is received at the second time; The first time and the second time are times of an internal clock.

Here, the communication protocol may be determined by the connection relationship between the power meter and the time synchronization terminal. For example, if the power meter and the time synchronization terminal are connected through an RS485 communication interface, the communication protocol may be a DL/T645 communication protocol. The embodiment is not limited to this.

Step S206: acquire processing delay of the first time synchronization message according to the first time, the second time, and the transmission delay; A correction time is obtained according to the processing delay, transmission delay, predetermined message assembly time, and time of the internal clock.

Here, the transmission delay is the transmission time of the message in the communication line, and after determining the connection method between the power meter and the time synchronization terminal, it can be calculated according to the baud rate of the data transmission and the message length. In addition, the processing delay is the time required for the power meter or time synchronization terminal to decompress the message.

Step S208: Send a time calibration message to the wattmeter to synchronize the local clock of the wattmeter, and the time calibration message includes the calibration time.

In the clock synchronizing method of the above-mentioned watt-hour meter, an accurate absolute time is obtained to synchronize subsequent clock counters to achieve subsequent accurate timing, and a first time synchronization message is transmitted at a first time by a preset communication protocol, and the watt hour meter is After receiving the first time synchronization message, feedback the second time synchronization message, record the second time the second message is received, combine the transmission delay of the message, and calculate the processing delay of the wattmeter for the message, Thereby, the calibration time of the local clock of the watt hour meter can be calculated, and synchronization of the watt hour meter is realized by sending a time calibration message to the watt hour meter. Embodiments of the present invention enable the watt hour meter to meet the needs of the second, by using an accurate clock source, and taking into account the transmission and processing delays of messages.

In one embodiment, as shown in FIG. 3, a clock synchronization method of another watt hour meter is provided, the method comprising the following steps:

Step S301: Acquire an absolute time and synchronize the internal clock according to the absolute time.

In one embodiment, as shown in Figure 4, the time synchronization terminal can obtain the absolute time from one base station, and generally, since the base station has a GPS module or the North Pole module, the time synchronization terminal is one base station By communicating, the absolute time of the base station can be obtained.

In another embodiment, as shown in FIG. 5, after obtaining the absolute time from a plurality of base stations, the time synchronization terminal can select one of the times of the plurality of base stations as an absolute time, thereby causing a failure in a single base station The inaccuracy of the time correction due to the problem can be avoided. Specifically, by comparing whether the times of a plurality of base stations match, the time of the most accurate base station is determined, but this is determined as absolute time.

In another embodiment, as illustrated in FIG. 6, the time synchronization terminal may include a GPS module or a big head module, and acquire an absolute time through a local GPS module or a big head module.

In addition, in one embodiment, the internal clock may be a clock counter, and the counter reference of the clock counter is an internal clock of the time synchronization terminal CPU to ensure the accuracy of the counter of the clock counter and synchronize the clock counter according to absolute time. , Achieve accurate time recording.

Step S302: Transmit the first time synchronization message to the watt hour at the first time by a preset communication protocol, receive the second time synchronization message fed back from the watt hour at the second time, and decompress the second time synchronization message The third time of the local clock of the watt-hour meter is obtained.

In the embodiment of the present invention, both the first time and the second time are obtained through the recording of the internal clock, and the third time is the time of the local clock of the watt hour meter.

Step S303: obtain a time error of the local clock of the watt hour meter according to the second time, the third time, and the transmission delay; It is determined whether or not the time error is within a preset time range, and accordingly, it is determined whether synchronization with the clock of the watt hour meter is performed.

In one embodiment, since the actual time of the watt-hour local clock at the second time can be obtained through the third time and the transmission delay, the real-time error of the watt-hour local clock can be calculated, and a corresponding time synchronization strategy is established. By doing so, for example, if the actual time error exceeds 1 second, it may be set to perform a time synchronization operation, or a different time range may be selected according to actual needs, and in the embodiment of the present invention, the local clock of the watt hour meter The formula for calculating the time error of is:

Here, dt0 represents the time error of the local clock of the watt hour meter, T3 represents the third time, T2 represents the second time, and dt2 represents the transmission delay.

If the time range>1s, when dt0≤1s, there is no need to perform time synchronization for the wattmeter, and this time synchronization operation ends, and if dt0>1s, perform time synchronization for the wattmeter and perform step S304. It needs to be done.

Step S304: Acquire the processing delay of the first time synchronization message according to the first time, the second time and the transmission delay, and correct according to the processing delay, transmission delay, predetermined message assembly time, and time of the internal clock Acquire time.

In this embodiment, first the power meter needs to calculate the processing delay to process the message, and then the power meter needs to determine the message assembly time to assemble the message and the transmission delay of the message, thereby determining the correction time in the time calibration message. .

Step S305: Synchronize the local clock of the wattmeter by sending a time calibration message to the wattmeter, and the time calibration message includes the calibration time.

In an embodiment of the present invention, through the calculation of the calibration time, according to a preset communication protocol, a time calibration message can be constructed, and the time synchronization terminal can transmit the time calibration message to the watt hour meter to realize time synchronization of the watt hour meter. have.

In one embodiment, as shown in FIG. 7, the time synchronization terminal and the power meter are connected by a physical link, and messages transmitted and received between the time synchronization terminal and the power meter must satisfy the power meter communication protocol. A method for clock synchronization of a watt hour meter is provided, which includes the following steps:

Step S401: At the time synchronization terminal side, an absolute time is acquired, and an internal clock is synchronized according to the absolute time.

In one embodiment, the time synchronization terminal can acquire the absolute time from one base station, and in general, since the base station has a GPS module or the North Star module, the time synchronization terminal acquires the absolute time of the base station by communicating with one base station. can do.

In another embodiment, after obtaining the absolute time from a plurality of base stations, the time synchronization terminal may select one of the times of the plurality of base stations as an absolute time, thereby causing an inaccurate time correction due to a failure in a single base station. In particular, by comparing whether the times of a plurality of base stations coincide, the time of the most accurate base station is determined, but this is determined as an absolute time.

In another embodiment, the time synchronization terminal may include a GPS module or a big head module, and acquire an absolute time through a local GPS module or a big head module.

In addition, in one embodiment, the internal clock may be a clock counter, and the counter reference of the clock counter is an internal clock of the time synchronization terminal CPU to ensure the accuracy of the counter of the clock counter and synchronize the clock counter according to absolute time. , Achieve accurate time recording.

Step S402: The time synchronization terminal side transmits a first time synchronization message conforming to the power meter communication protocol through the physical link to the power meter at the first time.

Step S403: On the power meter side, receive the first time synchronization message, process the first time synchronization message, and feed back a second time synchronization message conforming to the power meter communication protocol through the physical link to the time synchronization terminal, where the second time The time synchronization message includes the third time of the local clock of the watt hour meter.

Step S404: On the time synchronization terminal side, receive the second time synchronization message, and record this time as the second time; The second message is processed to obtain a third time of the local clock of the watt hour meter included in the second time synchronization message.

이고, 이어서 제 2 시간 T2에서 전력량계의 추정 시간

이고, 따라서 전력량계 로컬 클록의 시간 오류는

이다.In one embodiment, since the baud rate of the physical link is S, the second message length L2 of the second time synchronization message can be obtained, and the coding length of the second time synchronization message in the communication link is m, the second time synchronization Transmission delay for sending a message from the watt hour meter to the time synchronization terminal

And then the estimated time of the watt hour meter at the second time T2

And thus the time error of the wattmeter local clock is

to be.

In another embodiment, it is also necessary to determine whether dt0 satisfies the synchronization request in seconds, and if so, the additional time synchronization is not required and the entire time synchronization process is terminated. If not, step S405 is further provided. Should be performed.

Step S405: At the time synchronization terminal side, a processing delay of the first time synchronization message is acquired according to the first time, the second time, and the transmission delay.

In one embodiment, the first message length L1 of the first time synchronization message, the baud rate S of the physical link and the coding length m of the first time synchronization message on the communication link are obtained, and the first message length L1, the The transmission delay dt1 of the first time synchronization message is obtained according to the baud rate S of the RS485 interface and the coding length m of the first time synchronization message on the communication link. The transmission delay dt1 of the first time synchronization message can be expressed by the following formula:

The transmission delay dt2 of the second time synchronization message can be expressed by the following formula:

Then, the transmission delay dt3 of the first message can be expressed by the following formula:

Here, the physical link may be an RS485 interface link, an RS232 interface link, an Ethernet interface link, etc., and the power meter communication protocol may be a DL/T645 communication protocol, and a communication baud rate in the communication link of the RS485 interface may be set to 2400 bps, The coding length m of the first time synchronization message and the second time synchronization message on the communication link both indicate the coding length of each byte of the first time synchronization message and the second time synchronization message. For example, if the message length of the first time synchronization message is 8 bytes, the coding length m = 10 in the communication link.

Step S406: At the time synchronization terminal side, a correction time is obtained according to the processing delay, transmission delay, predetermined message assembly time, and time of the internal clock.

In an embodiment of the present invention, it is the delay of the message transmission that affects the time synchronization error, and then, after calculating each delay, it is possible to obtain the correction time according to the time at which the time correction message was transmitted.

In one embodiment, the calibration time T5 may be expressed by the following formula.

Here, T5 represents the calibration time in the time calibration message, T4 represents the time at which the time calibration message recorded by the internal clock is transmitted, dt4 represents the transmission delay of the time calibration message, and dt5 is a predetermined message. Shows the assembly time.

Specifically, the time calibration message is transmitted to the watt hour meter at time T4, and then the calibration time actually included in the time calibration message is T5, thereby enabling accurate time synchronization of the watt hour meter.

Step S407: At the time synchronization terminal side, a time calibration message is transmitted to the watt-hour meter to synchronize the local clock of the watt-hour meter, and the time calibration message includes the calibration time.

Step S408: On the wattmeter side, a time calibration message is received and calibration is performed on the local clock.

Step S409: The time synchronization terminal side waits for a preset time and transmits a third time synchronization message requesting the local clock time of the watt hour meter to the watt hour meter again.

Step S410: On the power meter side, a third time synchronization message is received, and a fourth time synchronization message including the local clock time of the power meter is generated and transmitted to the time synchronization terminal.

Step S411: The time synchronization terminal side receives and processes the fourth time synchronization message, calculates whether the time of the local clock of the watt hour meter is correct, and if it is correct, stops the time synchronization operation.

Although each step in the flowcharts of FIGS. 2 and 3 is sequentially displayed according to the direction of the arrow, it should be understood that these steps are not necessarily performed in the order indicated by the arrow. Unless explicitly stated herein, the order of execution of these steps is not strictly limited, and these steps may be performed in a different order. And, at least some of the steps of FIGS. 2 and 3 may include a plurality of sub-steps or a plurality of procedures, and these sub-steps or procedures may be executed at different times, not necessarily simultaneously, and these sub-steps Alternatively, the execution sequence diagram of the procedure may be executed sequentially or alternately with at least a portion of another step or sub-step or procedure of another step that is not necessarily sequentially.

In one embodiment, as shown in Figure 8, the clock synchronization device of the power meter including an internal time synchronization module 502, a message transmission and reception module 504, a delay calculation module 506 and a clock synchronization module 508 Is provided.

Here, the internal time synchronization module 502 is configured to acquire an absolute time and synchronize the internal clock according to the absolute time.

The message transmitting and receiving module 504 is configured to transmit the first time synchronization message to the watt hour meter at the first time by a preset communication protocol, and to receive the second time synchronization message fed back from the watt hour meter at the second time; The first time and the second time are times of an internal clock.

The delay calculation module 506 obtains the processing delay of the first time synchronization message according to the first time, the second time and the transmission delay; It is configured to obtain a calibration time according to the processing delay, transmission delay, predetermined message assembly time and time of the internal clock.

A clock synchronization module 508 is configured to send a time calibration message to the wattmeter to synchronize the local clock of the wattmeter, the time calibration message including the calibration time.

In one embodiment, decompressing the second time synchronization message to obtain a third time of the local clock of the watt hour meter; Acquire a time error of the local clock of the watt hour meter according to the second time, the third time and the transmission delay; It further includes a calibration determination module for determining whether the time error is within a preset time range and accordingly synchronizing the local clock of the watt hour meter.

In one embodiment, the calibration determination module is also configured to calculate the time error of the local clock of the wattmeter, the calculation formula is as follows.

Here, dt0 represents the time error of the local clock of the watt-hour meter, T2 represents the second time, T3 represents the third time, and dt2 represents the transmission delay.

In one embodiment, the message transmitting and receiving module 504 also transmits a first time synchronization message conforming to the watt hour communication protocol to the watt hour meter at a first time through the watt hour communication protocol of the physical link, and the watt hour communication communication protocol fed back from the watt hour meter. And a second time synchronization message conforming to the second time.

In one embodiment, the delay calculation module 506 also obtains the first message length of the first time synchronization message, the baud rate of the physical link and the coding length of the first time synchronization message on the communication link, and the first Obtain a transmission delay of the first time synchronization message according to the message length, the baud rate of the physical link and the coding length of the first time synchronization message on the communication link; Obtain a second message length of the second time synchronization message, and delay transmission of the second time synchronization message according to the second message length and the baud rate of the physical link and the coding length of the second time synchronization message on the communication link. Configured to obtain; The formula for calculating the processing delay of the first time synchronization message is as follows.

Here, dt1 represents the transmission delay of the first time synchronization message, dt2 represents the transmission delay of the second time synchronization message, T1 represents the first time, T2 represents the second time, and dt3 represents the first time synchronization Indicates the processing delay of the message.

In one embodiment, the delay calculation module 506 also obtains in advance the message assembly time and the message length of the time calibration message, the message length of the time calibration message, the baud rate of the RS485 interface and the time calibration in the communication link. Configured to obtain a transmission delay of the time calibration message according to the coding length of the message; The formula for calculating the calibration time in the time calibration message is as follows:

Here, T5 represents the calibration time in the time calibration message, T4 represents the time at which the time calibration message recorded by the internal clock is transmitted, dt4 represents the transmission delay of the time calibration message, and dt5 is a predetermined message. Shows the assembly time.

In one embodiment, obtaining absolute time from one base station; Or acquire times of a plurality of base stations, and select one of the times of the plurality of base stations as the absolute time; Alternatively, the absolute time is acquired through the internal GPS module or the North Pole module.

For a specific limitation on the clock synchronization device of the watt-hour meter, reference may be made to the limitation on the clock synchronization method of the watt-hour meter, and a detailed description thereof will be omitted here. Each module of the clock synchronizing device of the aforementioned watt-hour meter can be implemented in whole or in part through software, hardware, and combinations thereof. Each of the above-described modules may be embedded in a processor of a computer facility in a hardware form or may be stored in a memory of a computer facility in a software form, so that a processor calls to perform an operation corresponding to each module. .

In one embodiment, a computer facility is provided, which may be a server, and its internal structure may be as shown in FIG. 9. The computer facility includes a processor, memory, network interface and database connected via a system bus. Here, the processor of the computer facility is configured to provide computing and control functions. The memory of the computer facility includes a non-volatile storage medium and internal memory. The non-volatile storage medium stores an operating system, a computer program, and a database. The internal memory provides a diagram for executing the operating system and computer program stored in the non-volatile storage medium. The database of the computer equipment is configured to store data of clock synchronization of the wattmeter. The network interface of the computer equipment is configured to connect and communicate with external terminals through a network. When the computer program is executed by a processor, a clock synchronization method of the watt-hour meter is implemented.

Those skilled in the art are shown that the structure shown in FIG. 9 is a block diagram of some structures related only to the method of the present application, and is not a limitation on the computer equipment to which the method of the present application is applied, and the specific computer equipment is more or less than that shown in the drawings. It will be understood that parts may be included, some parts may be combined, or have a different arrangement of parts.

In one embodiment, a computer facility comprising a memory and a processor is provided, a computer program is stored in the memory, and the processor executes the computer program,

Obtaining an absolute time and synchronizing an internal clock according to the absolute time;

Transmitting a first time synchronization message to the watt hour meter at a first time by a preset communication protocol, and receiving a second time synchronization message fed back from the watt hour meter at the second time; The first time and the second time are times of an internal clock;

Obtaining a processing delay of the first time synchronization message according to the first time, the second time, and a transmission delay; Obtaining a correction time according to the processing delay, transmission delay, predetermined message assembly time, and time of the internal clock; And

A step of synchronizing the local clock of the wattmeter is implemented by sending a time calibration message to the wattmeter, and the time calibration message includes the calibration time.

In one embodiment, when the processor executes the computer program, decompressing the second time synchronization message to obtain a third time of the local clock of the wattmeter; Obtaining a time error of the local clock of the watt hour meter according to the second time, the third time and the transmission delay; The step of determining whether the time error is within a preset time range and determining whether to proceed with synchronization of the watt hour meter's local clock is further implemented.

In one embodiment, when the processor executes the computer program, it further includes the following formula for calculating the time error of the local clock of the wattmeter:

Here, dt0 represents the time error of the watt-hour meter, T2 represents the second time, T3 represents the third time, and dt2 represents the transmission delay.

In one embodiment, when the processor executes the computer program, through the watt hour communication protocol of the physical link, the first time synchronization message conforming to the watt hour communication protocol is transmitted to the watt hour meter at the first time, and the watt hour communication communication feedback from the watt hour meter The step of receiving a second time synchronization message conforming to the second time is further implemented.

In one embodiment, when the processor executes the computer program, the first message length of the first time synchronization message, the baud rate of the physical link and the coding length of the first time synchronization message on the communication link are obtained, and the first Obtaining a transmission delay of the first time synchronization message according to a message length, a baud rate of the physical link, and a coding length of a first time synchronization message on a communication link; Obtain a second message length of the second time synchronization message, and delay transmission of the second time synchronization message according to the second message length and the baud rate of the physical link and the coding length of the second time synchronization message on the communication link. The step of obtaining is further implemented; The formula for calculating the processing delay of the first time synchronization message is as follows:

Here, dt1 represents the transmission delay of the first time synchronization message, dt2 represents the transmission delay of the second time synchronization message, T1 represents the first time, T2 represents the second time, and dt3 represents the first time synchronization Indicates the processing delay of the message.

In one embodiment, when the processor executes the computer program, the message assembly time and the message length of the time calibration message are obtained in advance, the message length of the time calibration message, the baud rate of the physical link, and the time calibration on the communication link The step of obtaining the transmission delay of the time calibration message according to the coding length of the message is further implemented, and the formula for calculating the calibration time in the time calibration message is as follows:

Here, T5 represents the calibration time in the time calibration message, T4 represents the time at which the time calibration message recorded by the internal clock is transmitted, dt4 represents the transmission delay of the time calibration message, and dt5 is a predetermined message. Shows the assembly time.

In one embodiment, when the processor executes the computer program, obtaining absolute time from one base station; Or obtaining times of a plurality of base stations and selecting one of the times of the plurality of base stations as the absolute time; Alternatively, the step of acquiring the absolute time through the internal GPS module or the North Pole module is further implemented.

In one embodiment, a computer readable storage medium in which a computer program is stored is provided, and when the computer program is executed by a processor,

Obtaining an absolute time and synchronizing an internal clock according to the absolute time;

Transmitting a first time synchronization message to the watt hour meter at a first time by a preset communication protocol, and receiving a second time synchronization message fed back from the watt hour meter at the second time; The first time and the second time are times of an internal clock;

Obtaining a processing delay of the first time synchronization message according to the first time, the second time, and a transmission delay; Obtaining a correction time according to the processing delay, transmission delay, predetermined message assembly time, and time of the internal clock; And

A step of synchronizing the local clock of the wattmeter is implemented by sending a time calibration message to the wattmeter, and the time calibration message includes the calibration time.

In one embodiment, when the computer program is executed by a processor, decompressing the second time synchronization message to obtain a third time of the local clock of the wattmeter; Obtaining a time error of the local clock of the watt hour meter according to the second time, the third time and the transmission delay; The step of determining whether the time error is within a preset time range and determining whether to proceed with synchronization of the watt hour meter's local clock is further implemented.

In one embodiment, when a computer program is executed by a processor, the formula for calculating the time error of the local clock of the watt hour meter is as follows:

Here, dt0 represents the time error of the local clock of the watt-hour meter, T2 represents the second time, T3 represents the third time, and dt2 represents the transmission delay.

In one embodiment, when the computer program is executed by the processor, through a watt hour communication protocol of the physical link, a first time synchronization message conforming to the watt hour communication protocol is transmitted to the watt hour meter at the first time, and the watt meter communication fed back from the watt hour meter The step of receiving a second time synchronization message conforming to the protocol at the second time is further implemented.

In one embodiment, when a computer program is executed by a processor, the first message length of the first time synchronization message, the baud rate of the physical link and the coding length of the first time synchronization message on the communication link are obtained, Obtaining a transmission delay of the first time synchronization message according to a message length, a baud rate of the physical link, and a coding length of a first time synchronization message on a communication link; Obtain a second message length of the second time synchronization message, and delay transmission of the second time synchronization message according to the second message length and the baud rate of the physical link and the coding length of the second time synchronization message on the communication link. The step of obtaining is further implemented; The formula for calculating the processing delay of the first time synchronization message is as follows:

Here, dt1 represents the transmission delay of the first time synchronization message, dt2 represents the transmission delay of the second time synchronization message, T1 represents the first time, T2 represents the second time, and dt3 represents the first time synchronization Indicates the processing delay of the message.

In one embodiment, when a computer program is executed by a processor, the message assembly time and the message length of the time calibration message are obtained in advance, the message length of the time calibration message, the baud rate of the physical link, and the time on the communication link. The step of obtaining the transmission delay of the time calibration message according to the coding length of the calibration message is further implemented, and a formula for calculating the calibration time in the time calibration message is as follows:

Here, T5 represents the calibration time in the time calibration message, T4 represents the time at which the time calibration message recorded by the internal clock is transmitted, dt4 represents the transmission delay of the time calibration message, and dt5 is a predetermined message. Shows the assembly time.

In one embodiment, when the computer program is executed by a processor, obtaining an absolute time from one base station; Or obtaining times of a plurality of base stations and selecting one of the times of the plurality of base stations as the absolute time; Alternatively, the step of acquiring the absolute time through the internal GPS module or the North Pole module is further implemented.

Those skilled in the art, all or part of the process in the method of the above-described embodiment may consist of directing related hardware through a computer program, and the computer program may be stored in a non-volatile computer readable storage medium, and the computer program It will be understood that, when implemented, may include processes of embodiments of each method described above. Here, all references to the memory, storage, database, or other medium used in each embodiment provided in the present application may include non-volatile and/or volatile memory. Non-volatile memory may include read only memory (ROM), programmable ROM (PROM), electrical programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM), or flash memory. Volatile memory may include random access memory (RAM) or external high-speed buffer memory. The description is not limiting, and RAM can be obtained in several forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), Synchlink DRAM (SLDRAM), memory bus (Rambus) direct RAM (RDRAM), direct memory bus DRAM (DRDRAM), and memory bus DRAM (RDRAM).

Each technical feature of the above-described embodiment may be arbitrarily combined, and for the sake of brevity, all possible combinations of each technical feature of the above-described embodiments have not been described, but unless there is a contradiction in the combination of these technical features, all of the present It should be considered the scope of the specification.

The above-described embodiments merely represent specific embodiments of the present application, the description of which is described in more detail and in detail, but is not intended to limit the scope of the present invention. Those skilled in the art can make various modifications and improvements without departing from the concept of the present application, and it will be apparent that they are all within the protection scope of the present application. Accordingly, the scope of the present application is determined by the appended claims.

Claims (10)

As a clock synchronization method of the watt-hour meter,
Obtaining an absolute time and synchronizing an internal clock according to the absolute time;
Transmitting a first time synchronization message to the watt hour meter at a first time by a preset communication protocol, and receiving a second time synchronization message fed back from the watt hour meter at the second time; The first time and the second time are times of an internal clock;
Obtaining a processing delay of the first time synchronization message according to the first time, the second time, and a transmission delay; Obtaining a correction time according to the processing delay, transmission delay, predetermined message assembly time, and time of the internal clock; And
And synchronizing a local clock of the wattmeter by sending a time calibration message to the wattmeter, wherein the time calibration message includes the calibration time.
According to claim 1,
Decompressing the second time synchronization message to obtain a third time of the local clock of the watt hour meter;
Obtaining a time error of the local clock of the watt hour meter according to the second time, the third time and the transmission delay;
And determining whether the time error is within a preset time range and, accordingly, determining whether to synchronize the wattmeter with a local clock.
According to claim 2,
Obtaining a time error of the local clock of the watt hour meter according to the second time, the third time and the transmission delay,
Formula for calculating the time error of the local clock of the wattmeter:

Including,
Here, dt0 represents the time error of the local clock of the wattmeter, T2 represents the second time, T3 represents the third time, and dt2 represents the transmission delay.
According to claim 1,
Transmitting a first time synchronization message to the watt hour at the first time by the preset communication protocol, and receiving the second time synchronization message fed back from the watt hour at the second time,
Through the watt hour communication protocol of the physical link, a first time synchronization message conforming to the watt hour communication protocol is transmitted to the watt hour meter at the first time, and a second time synchronization message compliant with the watt hour communication message fed back from the watt hour meter is provided at the second time A method for synchronizing a clock of a watt-hour meter, comprising the step of receiving.
According to claim 4,
Obtaining a processing delay of the first time synchronization message according to the first time, the second time and the transmission delay,
Obtain the first message length of the first time synchronization message, the baud rate of the physical link and the coding length of the first time synchronization message on the communication link, the first message length, the baud rate of the physical link and the communication link Obtaining a transmission delay of the first time synchronization message according to the coding length of the first time synchronization message;
Acquire the second message length of the second time synchronization message, and delay the transmission of the second time synchronization message according to the second message length and the baud rate of the physical link and the coding length of the second time synchronization message on the communication link. Obtaining a;
Formula for calculating the processing delay of the first time synchronization message:

Including,
Here, dt1 represents the transmission delay of the first time synchronization message, dt2 represents the transmission delay of the second time synchronization message, T1 represents the first time, T2 represents the second time, and dt3 represents the first time synchronization Clock synchronization method of the watt hour meter, characterized in that it represents the processing delay of the message.
The method of claim 5,
Obtaining a correction time according to the processing delay, transmission delay, predetermined message assembly time, and time of the internal clock includes:
The message assembly time and the message length of the time calibration message are obtained in advance, and the transmission delay of the time calibration message according to the message length of the time calibration message, the baud rate of the physical link, and the coding length of the time calibration message on the communication link. Obtaining a;
The formula for calculating the calibration time in the above time calibration message:

Including,
Here, T5 represents the calibration time in the time calibration message, T4 represents the time at which the time calibration message recorded by the internal clock is transmitted, dt4 represents the transmission delay of the time calibration message, and dt5 is a predetermined message. Clock synchronization method of the watt-hour meter characterized by indicating the assembly time.
The method according to any one of claims 1 to 6,
The step of obtaining the absolute time,
Obtaining absolute time from one base station;
Or, obtaining time of a plurality of base stations, and selecting one of the times of the plurality of base stations as the absolute time;
Alternatively, the clock synchronization method of the watt hour meter, characterized in that it comprises the step of acquiring the absolute time through the internal GPS module or Beidou module.
As a clock synchronization device of the watt-hour meter,
An internal time synchronization module for obtaining an absolute time and synchronizing an internal clock according to the absolute time;
A message transmitting and receiving module for transmitting the first time synchronization message to the watt hour meter at a first time by a preset communication protocol and receiving the second time synchronization message fed back from the watt hour meter at the second time; The first time and the second time are times of an internal clock;
Acquire a processing delay of the first time synchronization message according to the first time, the second time, and a transmission delay; A delay calculation module for obtaining a correction time according to the processing delay, transmission delay, predetermined message assembly time, and time of the internal clock; And
And a clock synchronization module for synchronizing a local clock of the wattmeter by sending a time calibration message to the wattmeter, wherein the time calibration message includes the calibration time.
A computer facility including a memory and a processor in which a computer program is stored,
A computer equipment, characterized in that when the processor executes the computer program, steps of the method according to any one of claims 1 to 7 are implemented.
A computer-readable storage medium on which a computer program is stored,
A computer readable storage medium characterized in that when the computer program is executed by a processor, steps of the method according to any one of claims 1 to 7 are implemented.

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