Automatic meter reading system and meter reading method based on concentrator

Abstract

The invention relates to an automatic meter reading system and method based on a concentrator. Comprising a concentrator, a guide rail meter and a plurality of electric energy meters, the concentrator is in communication connection with the guide rail meter, and the guide rail meter is in communication connection with the plurality of electric energy meters through an RS485 bus; the guide rail meter reads the electric energy meter to obtain direct reading data and obtain pre-reading data according to a historical scheme, the guide rail meter directly transmits the direct reading data to the concentrator, and the guide rail meter sends the pre-reading data to the concentrator according to a corresponding instruction. And after the reading is completed for a first preset time, clearing the stored pre-read data by the guide rail table, and executing the process by the method. By setting a historical scheme, if the data pre-read by the guide rail meter is the data needing to be read by the concentrator, the time for temporarily reading the data from the downlink electric energy meter is shortened, meanwhile, it is guaranteed that the read data is the data temporarily read from the downlink electric energy meter, and the real-time performance of the data is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of automatic meter reading, and particularly to an automatic meter reading system and method based on a concentrator. Background Art

[0002] The rail-mounted electric energy meter can not only be used as a three-phase electric energy meter, but also act as a collector. It receives the meter reading data of the concentrator through the carrier channel, converts the data, and sends it to the electric energy meter from the RS485 channel. After receiving the data of the electric energy meter, it then forwards the data of the electric energy meter to the concentrator.

[0003] The invention patent with the publication number CN114374888A discloses a method, system and device for automatic meter reading based on HPLC concurrent multi-meter and multi-data item. The slave node searches for meters, searches and stores the addresses of multiple electric meters locally; and actively reports the topology table file information of the multiple electric meters hanging below it to the master node CCO. After the reporting is completed, pre-meter reading is performed, and the data of multiple electric meters and multiple data items are stored locally; the master node CCO transmits the topology table file information to the concentrator, and the concentrator judges whether all slave nodes have completed reporting; the concentrator sends a framed concurrent meter reading instruction to the master node CCO, and the master node CCO transmits the instruction to the corresponding slave node; the slave node sends the read frames of multiple electric meters and multiple data items pre-stored locally to the master node CCO and the concentrator; this patent has a large amount of meter reading data, cannot effectively reduce the data volume, and has low meter reading efficiency.

[0004] Therefore, it is an urgent problem to be solved at present to provide a meter reading system and method with high meter reading efficiency and good real-time performance. Summary of the Invention

[0005] The purpose of the present invention is to provide an automatic meter reading system and method based on a concentrator to overcome the defects of the above-mentioned existing technologies.

[0006] The purpose of the present invention can be achieved by the following technical solutions:

[0007] According to one aspect of the present invention, an automatic meter reading system based on a concentrator is provided, which includes a concentrator, a rail-mounted meter and a plurality of electric energy meters. The concentrator is communicatively connected to the rail-mounted meter, and the rail-mounted meter is communicatively connected to the plurality of electric energy meters respectively;

[0008] The rail-mounted meter reads the electric energy meters to obtain direct reading data and pre-meter reading data according to the historical scheme. The rail-mounted meter directly transmits the direct reading data to the concentrator, and the rail-mounted meter sends the pre-meter reading data to the concentrator according to the corresponding instruction. After the first preset time, the rail-mounted meter clears the stored pre-meter reading data.

[0009] As a preferred technical solution, the concentrator and the guide rail meter communicate via power line carrier or wireless communication.

[0010] As a preferred technical solution, the guide rail meter and the electricity meter communicate via RS485.

[0011] As a preferred technical solution, the guide rail meter and the electricity meter communicate via the DL / T698.45 protocol.

[0012] As a preferred technical solution, the first preset time is determined according to the real-time requirement for the concentrator to read data.

[0013] As a preferred technical solution, the first preset time is 30s.

[0014] According to another aspect of the present invention, there is provided a meter reading method for an automatic meter reading system based on a concentrator as described in any one of the above, the method specifically includes:

[0015] S1. The guide rail meter directly reads the direct reading data of the electricity meter and transmits the direct reading data to the concentrator, and then the guide rail meter reads the pre-reading data of the electricity meter according to the pre-reading scheme.

[0016] S2. The guide rail meter stores the pre-reading data in the RAM of the guide rail meter.

[0017] S3. The concentrator sends a data request to the guide rail meter, and the guide rail meter sends the pre-reading data of the corresponding electricity meter according to the data request.

[0018] S4. After the first preset time, the guide rail meter clears the pre-reading data in the RAM.

[0019] As a preferred technical solution, S1 specifically includes:

[0020] S11. If the concentrator has already read the data of a single electricity meter, the guide rail meter uses the data reading scheme of this meter as the pre-reading scheme for pre-reading.

[0021] As a preferred technical solution, S1 also specifically includes:

[0022] S12. If the concentrator has read the data of multiple electricity meters, the guide rail meter pre-reads the data using the scheme of the data most recently read by the concentrator and uses it as the pre-reading scheme.

[0023] As a preferred technical solution, S1 also specifically includes:

[0024] If the pre-reading scheme is different from the historical scheme, the guide rail meter uses the pre-reading scheme as the historical scheme and stores it in the non-volatile memory.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] 1. The present invention reduces the time for temporarily reading data from the downstream electric energy meter by setting a historical scheme. If the data pre-read by the guide rail meter is the data that the concentrator needs to read, it also ensures that the read data is the data temporarily read from the downstream electric energy meter, thus ensuring the real-time nature of the data.

[0027] 2. The historical scheme of the present invention is determined according to the pre-reading scheme. Different reading schemes are used as the historical scheme and the historical scheme is updated to ensure that the data during pre-reading is the required data.

[0028] 3. The present invention ensures the real-time nature of the data by setting a first preset time. After the time is reached, the data in the RAM is automatically cleared to ensure that the data is the latest obtained.

[0029] 4. The present invention can adopt the DL / T698.45 protocol. When the guide rail meter replies with data, it can also place other data that may need to be read in the follow-up reported data of the data for follow-up reporting. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 is the overall system schematic diagram of the present invention;

[0031] Figure 2 is the schematic diagram of the data transmission process of the present invention.

[0032] 1. Concentrator; 2. Guide rail meter; 3. Electric energy meter. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0033] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0034] In order to improve the efficiency and real-time nature of data during meter reading, the guide rail meter pre-judges the data that the concentrator may read according to the historical reading data of the concentrator, collects it from the electric energy meter, and stores it in the RAM, i.e., Random Access Memory. When the concentrator reads, it directly replies with the pre-read data.

[0035] Based on the above solution, the present invention provides an automatic meter reading system and a meter reading method based on a concentrator. By setting a historical solution in the present invention, if the data pre-read by the guide rail meter is the data that the concentrator needs to read, the time for temporarily reading data from the downstream electric energy meter is reduced, and at the same time, it is ensured that the data read is the data temporarily read from the downstream electric energy meter, ensuring the real-time nature of the data. The historical solution of the present invention is determined according to the pre-copying solution. Different meter reading solutions are used as the historical solution, and the historical solution is updated to ensure that the data required is obtained during pre-reading. By setting a first preset time in the present invention, after the time is reached, the data in the RAM is automatically cleared to ensure that the data is the latest obtained, ensuring the real-time nature of the data. The present invention can adopt the DL / T698.45 protocol, and when the guide rail meter replies with data, other data that may need to be read can also be placed in the follow-up reported data of the data and reported along with it.

[0036] Embodiment 1

[0037] As Figure 1 shown, an automatic meter reading system based on a concentrator includes a concentrator 1, a guide rail meter 2, and a plurality of electric energy meters 3. The concentrator 1 and the guide rail meter 2 are communicatively connected, and the guide rail meter 2 is respectively communicatively connected to the plurality of electric energy meters 3;

[0038] The guide rail meter 2 reads the electric energy meter 3 to obtain direct reading data and pre-read data according to a historical solution. The guide rail meter 2 directly transmits the direct reading data to the concentrator 1. The guide rail meter 2 sends the pre-read data to the concentrator 1 according to a corresponding instruction. After the first preset time, the guide rail meter 2 clears the stored pre-read data.

[0039] The concentrator 1 and the guide rail meter 2 communicate through power line carrier or wireless communication. The guide rail meter 2 and the electric energy meter 3 communicate through RS485. The guide rail meter 2 and the electric energy meter 3 communicate through the DL / T698.45 protocol. The first preset time is determined according to the immediacy requirement of the concentrator 1 for reading data. The first preset time is 30s.

[0040] In this embodiment, when the concentrator 1 reads the data of the electric energy meter 3, the guide rail meter 2 pre-judges in advance the data of other electric energy meters that the concentrator may read according to the historical reading data of the concentrator 1, collects it through the RS485 channel from the electric energy meter 3, and stores it in its own RAM. When the data items read by the concentrator 1 are the same as the pre-read data items, the pre-read data is directly replied. In this way, the process of the guide rail meter 2 immediately reading the data of the electric energy meter through RS485 is reduced during this process, improving the efficiency of meter reading.

[0041] Embodiment 2

[0042] A meter reading method for an automatic meter reading system based on a concentrator, the method specifically includes:

[0043] S1. The guide rail meter 2 directly reads the direct reading data of the electricity meter 3 and transmits the direct reading data to the concentrator 1. Subsequently, the guide rail meter 2 reads the pre-reading data of the electricity meter 3 according to the pre-reading scheme.

[0044] S2. The guide rail meter 2 stores the pre-reading data in the RAM of the guide rail meter 2.

[0045] S3. The concentrator 1 sends a data request to the guide rail meter 2, and the guide rail meter 2 sends the corresponding pre-reading data of the electricity meter 3 according to the data request.

[0046] S4. After a first preset time, the guide rail meter 2 clears the pre-reading data in the RAM.

[0047] Specifically included in S1 is:

[0048] S11. If the concentrator 1 has already read the data of a single electricity meter, the guide rail meter 2 uses the data reading scheme as the pre-reading scheme for pre-reading.

[0049] Also specifically included in S1 is:

[0050] S12. If the concentrator 1 has read the data of multiple electricity meters 3, the guide rail meter 2 pre-reads the scheme of the data recently read by the concentrator 1 and uses it as the pre-reading scheme.

[0051] Also specifically included in S1 is:

[0052] If the pre-reading scheme is different from the historical scheme, the guide rail meter 2 takes the pre-reading scheme as the historical scheme and stores it in the non-volatile memory.

[0053] The electricity meter 3 can collect various types of data, but the concentrator 1 may not need all the data, only one or two of them. The pre-reading scheme is to determine the data types to be pre-read according to the data types required by the concentrator 1 for pre-reading for future use. The concentrator 1 communicates with the guide rail meter through power line carrier or wireless, and the guide rail meter 2 communicates with the electricity meter 3 through the RS485 bus. The meter reading process is divided into the following steps:

[0054] 1). The concentrator 1 reads the data of a certain electricity meter 3 under the guide rail meter 2 through the carrier channel

[0055] 2). The guide rail meter 2 reads the data of the electricity meter 3 through the 485 channel

[0056] 3). The guide rail meter 2 replies to the concentrator 1 through the carrier channel according to the data read through the 485 channel.

[0057] When reading multiple meters, the above steps need to be repeated for each reading. When concentrator 1 reads the data of watt-hour meter 3, guide rail meter 2 pre-judges the data that concentrator 1 may read based on the historical reading data of concentrator 1, collects it from watt-hour meter 3 first, and stores it in the RAM. When concentrator 1 wants to read the data of other watt-hour meters 3, guide rail meter 2 can directly reply with the pre-read data. In this way, the process of the guide rail meter immediately reading the data of the watt-hour meter through RS485 is reduced during this process, improving the efficiency of meter reading.

[0058] 1). Concentrator 1 reads the data of one of the watt-hour meters 3 under the guide rail meter 2 through carrier wave

[0059] 2). The guide rail meter 2 reads the watt-hour meter 3 through the 485 channel and obtains the direct reading data

[0060] 3). The guide rail meter 2 replies the direct reading data to the concentrator 1 through the carrier wave channel. At the same time, the guide rail meter 2 reads the same pre-read data of other watt-hour meters according to the pre-reading plan, reads the pre-read data through the RS485 channel, and stores it in the RAM

[0061] 4). When the guide rail meter 2 receives that the concentrator 1 wants to read the data of other watt-hour meters 3, the guide rail meter 2 replies with the pre-read data of other watt-hour meters stored in the RAM. If the watt-hour meter uses the DL / T698.45 protocol, the guide rail meter can also place other data that may need to be read in the follow-up reported data of the data when replying the data.

[0062] 5). After a period of time (it can wait until the concentrator 1 has completed reading (after the last reading ends), and then delay for a period of time (such as 30s). The specific delay time can be determined according to the timeliness requirements of the concentrator 1 for reading data. If the concentrator's requirement for reading the watt-hour meter data must be within 30s, the time can be set to 30s), the guide rail meter 2 clears the data of the downstream watt-hour meter 3 read and stored in the RAM.

[0063] Among them, when the guide rail meter 2 pre-reads data, the pre-reading plan is selected as follows:

[0064] (1) If the concentrator 1 has already read the data of other watt-hour meters 3, the historical plan is used for reading, and the already read plan is used as the historical plan;

[0065] (2) If multiple watt-hour meters 3 have been read, the data items just read are used as the pre-reading plan, and the pre-reading plan is stored in the non-volatile memory as the historical plan.

[0066] (3) If the read data plan is different from the current historical plan (including the historical plan being empty), the new plan is stored in the non-volatile memory as the historical plan.

[0067] (4) The stored historical scheme includes the identifiers of the data items to be read by the electricity meter.

[0068] In this scheme, if the data pre-read by the rail meter is the data to be read by the concentrator, the time for temporarily reading data from the downstream electricity meter is reduced. At the same time, it is ensured that the data read is the data temporarily read from the downstream electricity meter, guaranteeing the real-time nature of the data.

[0069] Both the pre-read scheme and the historical scheme include multiple data types, respectively forming corresponding data type sets. By the relationship between the pre-read scheme set and the historical scheme set, it is determined whether the pre-read scheme and the historical scheme are the same. Suppose the historical scheme set includes voltage and current, and the pre-read scheme is voltage. Since the data types in the two sets are different, the historical scheme is updated.

[0070] As described above, the above are only the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of various equivalent modifications or substitutions, and these modifications or substitutions should all be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. An automatic meter reading system based on a concentrator, comprising a concentrator (1), a guide rail meter (2) and a plurality of electric energy meters (3), characterized in that, The concentrator (1) is communicatively connected to the rail-mounted meter (2), and the rail-mounted meter (2) is respectively communicatively connected to a plurality of electricity meters (3); The rail-mounted meter (2) reads the direct reading data from the electricity meter (3) and obtains the pre-reading data according to the historical scheme. The rail-mounted meter (2) directly transmits the direct reading data to the concentrator (1). The rail-mounted meter (2) sends the pre-reading data to the concentrator (1) according to the corresponding instruction. After the first preset time, the rail-mounted meter (2) clears the stored pre-reading data.

2. The automatic meter reading system based on a concentrator according to claim 1, characterized in that, The concentrator (1) and the rail-mounted meter (2) communicate via power line carrier or wireless communication.

3. An automatic meter reading system based on a concentrator according to claim 1, characterized in that, The rail-mounted meter (2) and the electricity meter (3) communicate via RS485.

4. The automatic meter reading system based on a concentrator according to claim 1, characterized in that, The rail-mounted meter (2) and the electricity meter (3) communicate via the DL / T698.45 protocol.

5. An automatic meter reading system based on a concentrator according to claim 1, characterized in that, The first preset time is determined according to the real-time requirement of the concentrator (1) for reading data.

6. The automatic meter reading system based on a concentrator according to claim 5, wherein The first preset time is 30s.

7. A meter reading method for an automatic meter reading system based on a concentrator as described in any one of claims 1-6, the method specifically includes: S1. The rail-mounted meter (2) directly reads the direct reading data of the electricity meter (3) and transmits the direct reading data to the concentrator (1). Subsequently, the rail-mounted meter (2) reads the pre-reading data of other electricity meters (3) according to the historical scheme; S2. The rail-mounted meter (2) stores the pre-reading data in the RAM of the rail-mounted meter (2); S3. The concentrator (1) sends a data request to the rail-mounted meter (2), and the rail-mounted meter (2) sends the pre-reading data of the corresponding electricity meter (3) according to the data request; S4. After the first preset time, the rail-mounted meter (2) clears the pre-reading data in the RAM.

8. The meter reading method according to claim 7, wherein Specifically included in S1 is: S11. If the concentrator (1) has already read the data of a single electricity meter (3), the rail-mounted meter (2) uses the scheme of this data reading as the pre-reading scheme for pre-reading.

9. The meter reading method according to claim 8, wherein Also specifically included in S1 is: S12. If the concentrator (1) has read the data of multiple electricity meters (3), the rail-mounted meter (2) pre-reads according to the scheme of the data recently read by the concentrator (1) and uses it as the pre-reading scheme.

10. The meter reading method according to claim 9, wherein Also specifically included in S1 is: If the pre-reading scheme is different from the historical scheme, the rail-mounted meter (2) takes the pre-reading scheme as the historical scheme and stores it in the non-volatile memory.

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