Carrier networking collector

Abstract

The invention relates to the technical field of signal collection, in particular to a carrier networking collector, and provides the following scheme aiming at the defects that networking cost and construction work amount are inconvenient to reduce and stability of carrier communication is inconvenient to improve in the prior art: the carrier networking collector comprises an equipment initialization module; the data acquisition module is connected with the equipment initialization module, and the data acquisition module is connected with a communication mode selection module; the data transmission module is connected with the communication mode selection module, the data transmission module is connected with an exception handling module, the equipment initialization module comprises a carrier unit, a communication interface unit and a storage unit, the carrier unit is connected with the communication interface unit, the communication interface unit is connected with the storage unit, and the storage unit is connected with the data transmission module. According to the invention, the networking cost and the construction work amount can be reduced, and the stability of carrier communication can be improved.

Description

Technical Field

[0001] The present application relates to the field of signal acquisition technology, and in particular to a carrier network collector. Background Art

[0002] A carrier network collector is an intelligent device based on power line carrier communication technology, combined with the Internet of Things or wireless transmission to realize remote data collection and transmission. Its core function is to use existing power lines to transmit data through power line carrier technology.

[0003] However, a carrier network collector in the prior art is not convenient for reducing networking costs and construction workload, and is not convenient for improving the stability of carrier communication. Summary of the Invention

[0004] The purpose of the present invention is to solve the shortcomings of the prior art that it is not convenient to reduce the networking cost and construction workload, and is not convenient to improve the stability of carrier communication, and to propose a carrier network collector.

[0005] The carrier network collector provided in this application adopts the following technical solution:

[0006] A carrier network collector, comprising:

[0007] Device initialization module;

[0008] A data acquisition module, the data acquisition module is connected to the device initialization module, and the data acquisition module is connected to the communication mode selection module;

[0009] A data transmission module is connected to the communication mode selection module, and the data transmission module is connected to the exception handling module.

[0010] Furthermore, the device initialization module includes a carrier unit, a communication interface unit and a storage unit, the carrier unit is connected to the communication interface unit, the communication interface unit is connected to the storage unit, the data acquisition module includes a data reading unit, a data segment storage unit and a data preprocessing unit, the data reading unit is connected to the data segment storage unit, and the data segment storage unit is connected to the data preprocessing unit.

[0011] Furthermore, the communication mode selection module includes a carrier channel detection unit and a protocol encapsulation unit, the carrier channel detection unit is connected to the protocol encapsulation unit, the data transmission module includes a carrier modulation and transmission unit, a concentrator processing unit and a master station system interaction unit, the carrier modulation and transmission unit is connected to the concentrator processing unit, and the concentrator processing unit is connected to the master station system interaction unit.

[0012] Furthermore, the concentrator processing unit includes data reception, data verification and data aggregation, wherein the data reception is connected to the data verification, and the data verification is connected to the data aggregation.

[0013] Furthermore, the device initialization module is used to connect to the power line and use the power line itself for power supply without the need for an external power supply. At the same time, it filters out noise other than the industrial frequency (50 / 60Hz), retains the carrier frequency band and broadband carrier, and checks whether the modem is normal, verifies the physical layer connection, and confirms that data storage space is available.

[0014] Furthermore, the data acquisition module is used to poll and read data, store data, real-time data: temporarily stored in RAM for fast upload, historical data: written to Flash after compression, support breakpoint resumption, data preprocessing to eliminate abnormal values, and integral verification of electric energy values to prevent pulse counting errors.

[0015] Furthermore, the communication mode selection module is used to send pilot signals weekly, detect the quality of the power line channel, and implement a multi-mode switching mechanism. When the main channel carrier fails, the backup channel is activated, the operator base station is dialed through AT commands, a TCP / IP link is established or the local RS485 bus is switched to. The bus controller is directly connected to the concentrator, and the original data is encapsulated according to the application layer protocol. The data frame contains a transaction identifier, a protocol identifier, and a unit identifier. The data field is added with an address, a control code, and a data identifier, and a CRC check code is added.

[0016] Furthermore, the data transmission module is used for carrier modulation and transmission, and uses orthogonal frequency division multiplexing technology to distribute data to multiple subcarriers to improve anti-interference ability. The modulated signal is injected into the power line through the coupler and transmitted to the concentrator. The concentrator processes the process, receives data, and the concentrator carrier module demodulates the signal and strips off the physical layer frame header. Data verification: check CRC. If the verification fails, return NAK (negative acknowledgment) to request retransmission. Data aggregation, merges data from multiple collectors, generates a protocol format file, interacts with the master station system, and the concentrator uploads the data to the master station via optical fiber / GPRS. After the master station parses, it generates an electricity consumption report and triggers an alarm.

[0017] Furthermore, the exception handling module is used for communication interruption processing and local storage: historical data is stored cyclically according to the first-in-first-out strategy, supporting 30-day network disconnection cache. After the link is restored, key data is retransmitted first. Clock synchronization fault tolerance: if the time calibration fails, the collector uses the local RTC and records the clock deviation value. After synchronization, the data timestamp is corrected. Hardware fault isolation: when an RS485 bus short circuit is detected, the bus power supply is automatically cut off to prevent the chip from burning. When the carrier module overheats, it runs at a reduced frequency or switches to a backup channel.

[0018] In summary, this application includes at least one of the following beneficial technical effects:

[0019] 1. It can effectively transmit information by superimposing high-frequency data signals on low-frequency power lines. Signal superposition and data transmission at frequencies ranging from tens of kilohertz to several megahertz allow this high-frequency signal to coexist with low-frequency 50 / 60Hz power signals on the same line without affecting the normal transmission of electricity.

[0020] 2. It can use OFDM (Orthogonal Frequency Division Multiplexing) to transmit data simultaneously using multiple orthogonal carriers, thereby improving data transmission rate and anti-interference ability. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a structural block diagram of a carrier network collector in Example 1 of the present application;

[0022] Figure 2 This is a structural block diagram of a device initialization module of a carrier network collector in Example 1 of the present application;

[0023] Figure 3 This is a structural block diagram of a data acquisition module of a carrier network collector in Example 1 of the present application;

[0024] Figure 4 This is a structural block diagram of a communication mode selection module of a carrier network collector in Example 1 of the present application;

[0025] Figure 5 This is a structural block diagram of a data transmission module of a carrier network collector in Example 1 of the present application;

[0026] Figure 6 This is a structural block diagram of a concentrator processing unit of a carrier network collector in Example 1 of the present application;

[0027] Figure 7 This is a collector networking diagram of a carrier network collector in Example 1 of the present application;

[0028] Figure 8 This is a schematic diagram of a carrier network collector in Example 1 of the present application. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0030] Example

[0031] Reference Figures 1-8 , a carrier network collector, comprising:

[0032] Device initialization module;

[0033] The data acquisition module is connected to the device initialization module and is connected to the communication mode selection module;

[0034] The data transmission module is connected to the communication mode selection module, and the data transmission module is connected to the exception handling module.

[0035] Specifically, the device initialization module includes a carrier unit, a communication interface unit and a storage unit, the carrier unit is connected to the communication interface unit, the communication interface unit is connected to the storage unit, the data acquisition module includes a data reading unit, a data segment storage unit and a data preprocessing unit, the data reading unit is connected to the data segment storage unit, and the data segment storage unit is connected to the data preprocessing unit.

[0036] Specifically, the communication mode selection module includes a carrier channel detection unit and a protocol encapsulation unit, the carrier channel detection unit is connected to the protocol encapsulation unit, the data transmission module includes a carrier modulation and transmission unit, a concentrator processing unit and a master station system interaction unit, the carrier modulation and transmission unit is connected to the concentrator processing unit, and the concentrator processing unit is connected to the master station system interaction unit.

[0037] Specifically, the concentrator processing unit includes data reception, data verification and data aggregation, where data reception is connected to data verification, and data verification is connected to data aggregation.

[0038] Specifically, the device initialization module is used to connect to the power line and use the power line itself for power supply without the need for an external power supply. At the same time, it filters out noise other than the industrial frequency (50 / 60Hz), retains the carrier frequency band and broadband carrier, and checks whether the modem is normal, verifies the physical layer connection, and confirms that data storage space is available.

[0039] Specifically, the data acquisition module is used to poll and read data, store data, real-time data: temporarily stored in RAM for fast upload, historical data: written to Flash after compression, support breakpoint resumption, data preprocessing to eliminate abnormal values, and integral verification of electric energy values to prevent pulse counting errors.

[0040] Specifically, the communication mode selection module is used to send pilot signals weekly, detect the quality of the power line channel, and implement a multi-mode switching mechanism. When the main channel carrier fails, it starts the backup channel, dials the operator's base station through AT commands, establishes a TCP / IP link or switches to the local RS485 bus, and directly connects to the concentrator through the bus controller. The original data is encapsulated according to the application layer protocol. The data frame contains a transaction identifier, a protocol identifier, and a unit identifier. The data field adds an address, a control code, a data identifier, and a CRC check code.

[0041] Specifically, the data transmission module is used for carrier modulation and transmission, and uses orthogonal frequency division multiplexing technology to distribute data to multiple subcarriers to improve anti-interference ability. The modulated signal is injected into the power line through the coupler and transmitted to the concentrator. The concentrator processes the data, receives the data, and the concentrator carrier module demodulates the signal and strips off the physical layer frame header. Data verification: check CRC. If the verification fails, return NAK (negative acknowledgment) to request retransmission. Data aggregation, merge data from multiple collectors, generate a protocol format file, interact with the master station system, and the concentrator uploads the data to the master station via optical fiber / GPRS. After the master station parses it, it generates an electricity consumption report and triggers an alarm.

[0042] Specifically, the exception handling module is used to handle communication interruptions and local storage: historical data is stored cyclically according to the first-in-first-out strategy, supporting 30-day network disconnection cache. After the link is restored, key data is retransmitted first. Clock synchronization fault tolerance: if the time calibration fails, the collector uses the local RTC and records the clock deviation value. After synchronization, the data timestamp is corrected. Hardware fault isolation: when an RS485 bus short circuit is detected, the bus power supply is automatically cut off to prevent chip burning. When the carrier module overheats, it runs at a reduced frequency or switches to the backup channel.

[0043] The implementation principle of a carrier network collector in an embodiment of the present application is as follows: when in use, high-frequency data signals are superimposed on low-frequency power lines to achieve effective information transmission. Signal superposition transmits data at a frequency ranging from tens of kilohertz to several megahertz. This high-frequency signal coexists with the low-frequency 50 / 60Hz power signal on the same line without affecting the normal transmission of electricity. In order to effectively modulate the data signal onto the power line, OFDM (orthogonal frequency division multiplexing) is adopted, using multiple orthogonal carriers to transmit data simultaneously, thereby improving the data transmission rate and anti-interference capability. The signal is modulated using frequency modulation. The data acquisition module has both sending and receiving functions. After receiving the transmission signal on the power line, the high-frequency signal is extracted and demodulated to restore it to the original data. This process includes removing noise and interference to ensure the integrity and accuracy of the data. The power is supplied by the power line itself, without the need for an external power supply. Noise other than the power frequency (50 / 60Hz) is filtered out, and the carrier frequency band and broadband carrier are retained. After starting through the hardware self-test, The MCU (microcontroller) detects the status of the core module, checks whether the modem is normal through the carrier unit, verifies the physical layer connection through the communication interface unit, confirms the availability of data storage space through the storage unit, connects to the meter through the RS485 bus, and polls to read data (such as voltage, current, power, and electric energy value) in accordance with the DL / T645 or Modbus protocol format. If it is an independent sensor (such as temperature and humidity), the analog signal is collected and converted into digital quantity through the ADC (analog-to-digital converter). Data is segmented and stored according to the time period rate (peak, flat, and valley) defined by the power grid company, and stored in different storage areas. The storage strategy is to store real-time data temporarily in RAM for fast upload. Historical data is compressed and written to Flash, supporting breakpoint resumption. Data preprocessing is carried out to eliminate outliers (such as data with instantaneous current exceeding 200% of the rated value). The electric energy value is integrated and checked to prevent pulse counting errors. Carrier channel detection is carried out. The carrier unit periodically sends pilot signals to detect the quality of the power line channel. Evaluation indicators include signal-to-noise ratio (SNR) and bit error rate (BER). If SNR<15dB or BER>10 -3, it is determined that the channel is degraded, the multi-mode switching mechanism, when the main channel (carrier) fails. Start the backup channel, dial the operator base station through the AT command, establish a TCP / IP link, or switch to the local RS485 bus, directly connect to the concentrator through the bus controller, protocol encapsulation, encapsulate the original data according to the application layer protocol, Modbus-TCP, the data frame contains the transaction identifier, protocol identifier, unit identifier, DL / T645-2007 data field adds address, control code, data identifier, add CRC check code, use OFDM (orthogonal frequency division multiplexing) technology, distribute data to multiple subcarriers, improve anti-interference ability, the modulated signal is injected into the power line through the coupler and transmitted to the concentrator, the concentrator processes the process unit data reception, the concentrator carrier module demodulates the signal, strips the physical layer frame header, data verification, check CRC, if the verification fails, return NAK (negative acknowledgment) requires retransmission, data aggregation, merging data from multiple collectors, generating a protocol format file, and the master station system interaction unit concentrator uploads the data to the master station via optical fiber / GPRS. After analysis, the master station generates an electricity consumption report and triggers an alarm (such as abnormal line loss and electricity theft detection). Communication interruption processing and local storage are used. Historical data is stored in a cyclic manner according to the "first in, first out" strategy, supporting 30-day network disconnection cache. After the link is restored, key data (such as rate switching point data) is retransmitted first. Clock synchronization is fault-tolerant. If the time calibration fails, the collector uses the local RTC and records the clock deviation value. The data timestamp is corrected after synchronization. Hardware fault isolation is used. When an RS485 bus short circuit is detected, the bus power supply is automatically cut off to prevent chip burning. When the carrier module overheats, it runs at a reduced frequency or switches to the backup channel.

[0044] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A carrier network collector, characterized by: include: Device initialization module; A data acquisition module, the data acquisition module is connected to the device initialization module, and the data acquisition module is connected to the communication mode selection module; A data transmission module is connected to the communication mode selection module, and the data transmission module is connected to the exception handling module.

2. The carrier network collector according to claim 1, characterized in that: The device initialization module includes a carrier unit, a communication interface unit and a storage unit, the carrier unit is connected to the communication interface unit, the communication interface unit is connected to the storage unit, the data acquisition module includes a data reading unit, a data segment storage unit and a data preprocessing unit, the data reading unit is connected to the data segment storage unit, and the data segment storage unit is connected to the data preprocessing unit.

3. The carrier network collector according to claim 2, characterized in that: The communication mode selection module includes a carrier channel detection unit and a protocol encapsulation unit, and the carrier channel detection unit is connected to the protocol encapsulation unit. The data transmission module includes a carrier modulation and transmission unit, a concentrator processing unit and a master station system interaction unit, and the carrier modulation and transmission unit is connected to the concentrator processing unit, and the concentrator processing unit is connected to the master station system interaction unit.

4. The carrier network collector according to claim 3, characterized in that: The concentrator processing unit includes data receiving, data checking and data aggregation, wherein the data receiving is connected with the data checking, and the data checking is connected with the data aggregation.

5. The carrier network collector according to claim 4, characterized in that: The device initialization module is used to connect to the power line and use the power line itself for power supply without the need for an external power supply. At the same time, it filters out noise other than the power frequency, retains the carrier frequency band and broadband carrier, checks whether the modem is normal, verifies the physical layer connection, and confirms that data storage space is available.

6. The carrier network collector according to claim 5, characterized in that: The data acquisition module is used to poll and read data, store data, real-time data: temporarily stored in RAM for fast upload, historical data: written to Flash after compression, support breakpoint resumption, data preprocessing to eliminate abnormal values, and perform integral verification on electric energy values to prevent pulse counting errors.

7. The carrier network collector according to claim 6, characterized in that: The communication mode selection module is used to send pilot signals weekly, detect the quality of the power line channel, and implement a multi-mode switching mechanism. When the main channel carrier fails, it starts the backup channel, dials the operator's base station through AT commands, establishes a TCP / IP link or switches to the local RS485 bus, and directly connects to the concentrator through the bus controller. The original data is encapsulated according to the application layer protocol. The data frame contains a transaction identifier, a protocol identifier, and a unit identifier. The data field adds an address, a control code, a data identifier, and a CRC check code.

8. The carrier network collector according to claim 7, characterized in that: The data transmission module is used for carrier modulation and transmission, and uses orthogonal frequency division multiplexing technology to distribute data to multiple subcarriers to improve anti-interference ability. The modulated signal is injected into the power line through the coupler and transmitted to the concentrator. The concentrator processes the flow, receives data, the concentrator carrier module demodulates the signal, strips off the physical layer frame header, and performs data verification: checks CRC. If the verification fails, returns NAK to request retransmission. Data is aggregated and data from multiple collectors is merged to generate a protocol format file. The master station system interacts and the concentrator uploads the data to the master station via optical fiber / GPRS. After the master station parses the data, it generates an electricity consumption report and triggers an alarm.

9. The carrier network collector according to claim 8, characterized in that: The exception handling module is used for communication interruption processing and local storage: historical data is stored cyclically according to the first-in-first-out strategy, and supports 30-day network disconnection cache. After the link is restored, key data is retransmitted first. Clock synchronization fault tolerance: if the time calibration fails, the collector uses the local RTC and records the clock deviation value. After synchronization, the data timestamp is corrected. Hardware fault isolation: when an RS485 bus short circuit is detected, the bus power supply is automatically cut off to prevent chip burning. When the carrier module overheats, it runs at a reduced frequency or switches to a backup channel.

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