TWI566543B - Communication server and operation method thereof - Google Patents

Description

Communication server and its operation method

The present invention relates to a communication server, and more particularly to a communication server for communicating with a data logger that receives and computes data transmitted by a data logger.

Data loggers generally include a microprocessor and memory, and therefore have the ability to record data over time, typically in environments where long-term data logging is required, such as solar power plants, unmanned weather stations, and the like. 1 is a schematic diagram of a conventional data logger applied to a solar power plant. As shown in FIG. 1, the solar power plant 100 includes a data recorder 10, a frequency converter 20, a sunshine meter 30, a commercial electricity meter 40, a switch 50, and a router 60. The frequency converter 20 is configured to convert direct current (DC) generated by a solar panel (not shown) into alternating current (AC), the solar meter 30 is used to measure the luminosity of the sunlight, and the commercial electric meter 40 is used to charge the electricity, and is switched by the switch. 50 do switching control. The data logger 10 is electrically connected to the frequency converter 20, the sunshine meter 30, the commercial electricity meter 40, the switch 50, and the router 60 to receive a plurality of data, and transmits the received plurality of data to the remote server 70 through the router 60. A graph of the data statistics is generated after the calculation.

However, if the data quality is unstable due to network quality The connection between the 10 and the remote server 70 is interrupted, and when the connection is interrupted, the data transmission is interrupted and the data that the remote server 70 should have received is omitted until the data recorder 10 and the data recorder 10 When the connection between the remote servers 70 is resumed, the data logger 10 will retransmit the missing data, that is, retransmit the missing data to the remote server 70. Some higher-standard data loggers 10 have a file system architecture, so that after the connection is restored, a plurality of pieces of data missed during the disconnection can be collectively packaged into a single file and sent to the remote server 70 for operation. However, this method does not impose a large burden on the remote server 70 because only one retransmission and one operation are required, but the disadvantage is that it requires a high equipment cost.

Some lower specification data loggers 10 do not have a file system architecture, so a microprocessor (MCU) can be used to transmit a single piece of data to the remote server 70 at a time, that is, if micro When the data logger 10 of the processor architecture cannot package multiple pieces of data into a single file and transfer them at one time, the missing data must be sequentially transferred from the starting position of the memory after the connection is restored. However, since the microprocessor belongs to the hardware architecture of a single thread, it must process multiple pieces of data sequentially, during which the data logger 10 will be in an uncommented state, and if the data is processed for a long time, it is easy. The user is mistaken for the fault of the data logger 10, which is inconvenient to use.

In view of the above, since the data logger 10 must sequentially replenish the missing data from the starting position of the memory after the connection is restored, if the capacity of the memory is insufficient, some of the data may be stored in the memory. The data is overwritten, so that the remote server 70 cannot judge whether the data supplemented by the data logger 10 has been completely transferred, and cannot be judged. Whether the data received after the connection is restored is the supplementary data. At this time, it is necessary to confirm whether the missing data has been completely transferred by manual interpretation. However, when the number of data recorders 10 is large, it is difficult to pass. Interpretation in a manual manner. In addition, after the connection is restored, the remote server 70 may be able to calculate each piece of data transmitted by the data logger 10 and compare the results of the multiple operations to know whether the missing data has been The completion of the transfer is completed, but this practice greatly increases the computational load on the remote server 70.

The present invention provides a communication server that can improve the above problems.

The present invention further provides an arithmetic method suitable for the above communication server.

The communication server provided by the invention is used for communicating with a data logger, which comprises a communication unit and a processing unit. The processing unit is electrically coupled to the communication unit and establishes a connection with the data logger through the communication unit. The communication unit receives the data transmitted by the data logger through the connection. The processing unit determines whether the received data includes the patch data by detecting whether the frequency of the data received by the communication unit exceeds the preset frequency, and wherein the patch data is received by the processing unit during the interruption period of the connection. The data received during the period in which the connection was interrupted because the connection was interrupted.

The invention further provides an operation method suitable for the above communication server, which comprises the steps of: establishing a connection and transmitting the data transmitted by the data recorder through the connection; and detecting the data received by the communication unit. Whether the frequency exceeds the preset frequency; when detecting that the frequency of receiving the data by the communication unit exceeds the preset frequency, determining that the data received by the communication unit includes the replacement And; when detecting that the frequency of receiving the data by the communication unit does not exceed the preset frequency, determining that the communication unit receives the patch data.

The communication server of the present invention determines whether the received data contains the supplementary transmission data that cannot be transmitted when the connection is interrupted and is retransmitted after the connection is restored, by detecting whether the frequency of the data received by the communication unit exceeds the preset frequency. Even if the data logger connected to the communication server is only a single-threaded hardware architecture, it can be judged through the above-mentioned judgment mechanism whether the data transmitted after the connection is restored is the supplementary transmission data.

10, 210‧‧‧ data logger

20‧‧‧Inverter

30‧‧‧ Days

40‧‧‧Commercial electricity meter

50‧‧‧ switch

60‧‧‧ router

70, 200‧‧‧ remote communication server

201‧‧‧Communication unit

202‧‧‧Processing unit

A, B‧‧ hours

A1, A2, A3‧‧‧ normal information

B1~Bn‧‧‧Remove data

401~404‧‧‧Steps

1 is a schematic diagram of a conventional data logger applied to a solar power plant; FIG. 2 is a schematic diagram of a communication server according to an embodiment of the present invention; FIG. 3 is a schematic diagram of a data receiving frequency of a communication server according to an embodiment of the present invention; 4 is a flowchart of a computing method of a communication server according to an embodiment of the present invention.

2 is a schematic diagram of a communication server according to an embodiment of the present invention. As shown in FIG. 2, the communication server 200 is configured to communicate with a data logger 210. The communication server 200 includes a communication unit 201 and a processing unit 202. The processing unit 202 is electrically coupled to the communication unit 201 and establishes a connection with the data logger 210 through the communication unit 201 for data communication. The communication unit 201 receives the data transmitted by the data logger 210 through the connection. The processing unit 202 detects whether the frequency of the data received by the communication unit 201 exceeds a preset frequency. Determine whether the received data contains supplementary data. The foregoing patch data is data that the processing unit 202 should receive during the period in which the connection is interrupted and is not received during the period in which the connection is interrupted because the connection is interrupted. In detail, the data logger 210 is used to periodically collect (for example, once per hour) information about the electronic device connected thereto (for example, a reading of a solar illuminometer, a reading of a commercial electric meter, or a current power generation amount of a solar panel), and Transfer to the communication server 200.

When the connection between the communication server 200 and the data logger 210 is interrupted, the data that should be transmitted to the communication server 200 may not be transmitted because the connection is interrupted, so when the connection is made Upon recovery, the communication server 200 will re-receive the data (ie, the patch) that was missed during the interruption of the connection. However, after the connection is restored, the data received by the communication server 200 may also be the data routinely received during the period (referred to as normal data), so the processing unit 202 of the communication server 200 determines the communication unit 201. The frequency of receiving data is used to determine whether the received data is a supplementary data.

FIG. 3 is a schematic diagram of data receiving frequency of a communication server according to an embodiment of the present invention. As shown in FIG. 3, the data received by the communication unit 201 of the communication server 200 from the connection includes the patch data B1~Bn and the normal data A1~A3. In the present embodiment, the normal data A1, A2, A3 represent the data received by the communication server 200 at the preset frequency, and the time period A represents the communication unit 201 in addition to the normal data A1, A2 transmitted by the data logger 210. It also receives the supplementary data B1~Bn, while the time period B represents only the normal data A2 and A3. The communication server 200 receives normal data at a preset frequency under ideal conditions. However, the connection quality between the communication server 200 and the data logger 210 may be unstable, thereby causing the communication server 200 to receive normal resources. The frequency of the material is inaccurate with the preset frequency, so the design of the safety factor is generally added during implementation. The safety factor is, for example, an error range value of the preset frequency, that is, it is assumed that when the communication server 200 receives an ordinary data every 5 minutes under ideal conditions, when the connection quality is unstable, the communication is performed. For example, the server 200 receives the data in the 6th minute and is also a normal data. As can be seen from FIG. 3, since the data logger 210 re-establishes the connection after the disconnection, the data accumulated in the data logger 210 cannot be transferred during the disconnection period, and the data is replenished to form the so-called patch data B1~Bn. Therefore, the communication unit 201 receives the frequency of the patch data B1~Bn is greater than the frequency of receiving the normal data A1, A2, so when the processing unit 202 detects that the frequency of the data received by the communication unit 201 exceeds the preset frequency (for example, the period A) Then, it can be judged that the data received by the communication unit 201 is the patch data B1~Bn, until the processing unit 202 detects that the frequency of the data received by the communication unit 201 is a preset frequency (for example, the period B), the communication unit 201 can be judged. The receipt of the supplementary data has been completed. However, the processing unit 202 can also detect whether the frequency of the data received by the communication unit 201 is a preset frequency multiple times to ensure that the communication unit 201 has completed receiving the data. In addition, when the communication unit 201 receives the normal data and the supplementary data by the connection, the normal data can be preferentially received to avoid the storage of the memory (not shown) in the data logger 210. The normal data is overwritten because of insufficient memory space. For example, if the communication unit 201 receives a normal data every 5 minutes and receives a supplemental data every 5 seconds, when the above 5-minute and 5-second time periods overlap, the normal data is preferentially received.

In addition, when the patch data transmitted by the data logger 210 is a macro file (single integrated data file), the processing unit 202 can also determine that the patch file has been received and the macro file is interpreted and presented. One Generally speaking, the definition of a macro file is to include a series of instructions or materials in the same file. That is to say, a macro file contains a large amount of information. In this embodiment, the macro file system is configured to include at least one padding data and is transmitted in the form of a file. If the specification of the data logger 210 is high, the multi-patch data is collectively packaged into a single file format. The ability of the communication server 200 only needs to receive a single macro file containing multiple pieces of data to be recalculated after the connection is restored, that is, the data missing during the connection interruption period is recalculated, that is, only needed Receiving data and performing one operation can re-interpret and present the data missed when the connection is interrupted. For example, when applied to a solar power plant, the missing data will be recalculated when the connection is interrupted. The corresponding power generation amount at a specific time point during the interruption of the connection line is known, and the recalculated data is presented in the form of, for example, a graph for the user to more intuitively understand the state of power generation of the power plant. However, if the specification of the data logger 210 is insufficient to package a plurality of patches of data into a single file format, the communication server 200 must re-receive the data missed when the connection is interrupted.

In the above, when the patch data transmitted by the data logger 210 is not a macro file but a plurality of single data, the processing unit 202 determines whether the frequency of the data received by the communication unit 201 does not exceed the preset frequency. Whether the patch data has been received.

The invention will now be described in more detail. The processing unit 20 of the communication server 200 is further configured to store a plurality of parameters including a system connection flag, a system disconnection time point, and a patch data flag. When the connection is interrupted, the processing unit 20 records the system connection flag as the disconnection state, the recording system disconnection time point, and the record fill data flag as an incomplete state. When the connection is interrupted and then reconnected, the processing unit 202 is a recording system. The connection flag is in a connected state, and when the processing unit 202 detects that the frequency of the data received by the communication unit 201 does not exceed the preset frequency, the data is interpreted and presented, and the padding data flag is recorded as a completion status. .

As shown in Table 1 below, the last three parameters in Table 1 are used for explanation.

When the connection is interrupted at 3 o'clock (2014/05/05 03:00:00) on May 5, 2014, the processing unit 202 sets the system connection flag to 0 to indicate the disconnection state, and The patch data flag is also set to 0 to indicate that the data is added to the incomplete state, and the last time and the disconnection time point (2014/05/05 03:00:00) system connection flag, fill the data flag The target status parameters are stored. Then, when the connection is restored at 9:00 (2014/05/05 09:00:00) on May 5, 2014, the processing unit 202 sets the system connection flag to 1 to indicate the connection status. And after judging that the data is filled, the patch data flag is also set to 1 to indicate that the data is added to the completion state, and finally the state parameter of the patch data flag is 1 is stored. In addition, the state parameter of the patch data flag of 1 can be regarded as the effective parameter of the processing unit 202 when recalculating the patch data when the connection is interrupted multiple times. To explain.

As shown in Table 2 below, the two parameters of the fill data flag are set to be explained.

The time point of the first pen-filling data flag in Table 1 is 12:00 on February 25, 2014 (2014/2/25 12:00:17), and the second pen-filling data flag is 1 The point is 9:00 on May 5, 2014 (2014/5/5 09:00:00). The system connection flag parameter between the above two time points has multiple 0 and 1 states, which are indicated above. The connection between the two time points has been interrupted several times, and the parameters of the patch data flag are 0, indicating that the connection is interrupted when the communication server 200 has not received the data. When the pen fill data flag is 1, the time is actually received. At this point, it is only necessary to query the time points when the two fill data flags are 1, and the time starting point required for recalculating the data is known.

It is added that when the processing unit 202 detects that the frequency of the data received by the communication unit 201 does not exceed the preset frequency, it is determined that the data is received. At the end of time, the processing unit 202 interprets and presents the patch data and records the patch data flag as 1, that is, the data fill completion status.

4 is a flow chart of a method for computing a communication server according to an embodiment of the present invention. The previously described communication server 200 and its operation mode can be summarized into an operation flow, as shown in FIG. 4, which includes steps 401 to 404. Step 401: Establish a connection and pass the connection to enable the communication unit to receive the data transmitted by the data logger. Step 402: Detect whether the frequency of the data received by the communication unit exceeds a preset frequency. Step 403: When detecting that the frequency of receiving the data by the communication unit exceeds the preset frequency, determining that the data received by the communication unit includes the patch data. Step 404: When detecting that the frequency of receiving the data by the communication unit does not exceed the preset frequency, determining that the communication unit receives the completion of the data. Wherein, when it is judged that the communication unit receives the completed data, the processing unit interprets and presents the supplementary data, for example, updates the trial or statistical table according to the subsequently received data, and outputs/displays the updated trial balance or Statistics and so on.

In summary, the present invention determines whether the received data contains the patch data by detecting whether the frequency of the data received by the communication server exceeds the preset frequency, and the received packet is received after the communication server receives the patch data. The data is interpreted and presented to complement the information missing from the interruption of the connection. The present invention determines whether the data is completed or not by the above-mentioned communication server operation mechanism, so the data logger for single thread and multi-thread is not required to increase the equipment cost, and does not impose an excessive burden on the communication server. .

While the present invention has been described in its preferred embodiments, the present invention is not intended to limit the invention, and the present invention may be modified and modified without departing from the spirit and scope of the invention. Protection The scope of protection is subject to the definition of the scope of the patent application attached.

401, 402, 403, 404‧ ‧ steps

Claims (10)

A communication server for communicating with a data logger, the communication server comprising: a communication unit; and a processing unit electrically coupled to the communication unit and establishing a connection with the data logger through the communication unit The communication unit receives the data transmitted by the data logger through the connection, and the processing unit determines whether the received data includes a supplementary data according to whether the frequency of the data received by the communication unit exceeds a predetermined frequency. The patch data is data that the processing unit should receive during the period when the connection is interrupted and is not received during the period when the connection is interrupted because the connection is interrupted. For example, in the communication server described in claim 1, wherein when the patch data is a macro file, the processing unit determines that the patch data has been received and the macro file is interpreted and Presented, wherein the macro file system contains at least one patch data and is transmitted in an archive form. The communication server of claim 1, wherein the processing unit determines that the patch data has been received by detecting that the frequency of the data received by the communication unit does not exceed the preset frequency. The communication server of claim 3, wherein the processing unit is further configured to store a system connection flag, a system disconnection time point, and a fill data flag. When the connection is interrupted, The processing unit records the system connection flag as a disconnection state, records the system disconnection time point, and records the complement The data flag is thrown to an incomplete state. The communication server of claim 4, wherein when the connection is interrupted and then reconnected, the processing unit records the system connection flag as a connection state, and when the processing unit When detecting that the frequency of receiving the data by the communication unit does not exceed the preset frequency, the patch data is interpreted or presented, or interpreted and presented, and the patch data flag is recorded as a completed state. The communication server according to any one of claims 3 to 4, wherein when the processing unit detects that the frequency of the data received by the communication unit does not exceed the preset frequency and determines that the supplemental data is received, the The processing unit interprets and presents the patch data and records the patch data flag as a completed state. The communication server of claim 1, wherein the information received by the communication unit by the connection further comprises a normal data, and the communication unit receives the supplementary data at a frequency greater than a frequency of receiving the normal data. The data received by the communication unit at the preset frequency is the normal data. The communication server of claim 7, wherein the communication unit preferentially receives the normal data when the normal data and the supplementary data are simultaneously received by the communication unit. A communication server operation method is applicable to a communication server and a data logger communicating with the communication server, the communication server includes a communication unit and a processing unit, and the communication server operation method comprises: Establishing a connection through which the communication unit receives the data transmitted by the data logger; detecting whether the frequency of the data received by the communication unit exceeds a predetermined frequency; and detecting the frequency of receiving the data by the communication unit When the preset frequency is exceeded, it is determined that the data received by the communication unit includes a patching data; and when detecting that the frequency of receiving the data by the communication unit does not exceed the preset frequency, determining that the communication unit receives the patching data . The communication server operation method of claim 9, wherein the processing unit interprets and presents at least one of the patch data when the communication unit determines that the patch data is received.