阅读说明：本技术 分析本地通信网络进行运行质量的方法及设备 (Method and equipment for analyzing running quality of local communication network ) 是由 王影新 于 2021-07-22 设计创作，主要内容包括：本发明涉及分析本地通信网络进行运行质量的方法及设备,其设备包括通过通讯线路连接以下模块的终端；处理器单元,作为HPLC载波监听设备的核心,管理和控制其它功能单元并进行分析计算处理；实时时钟单元,用于维持准确的日期时间信息,掉电不丢失,为统计分析功能提供标准时标信息；存储器单元,具有缓存和非易失性存储介质的功能,用于存储大量监听到的原始报文信息,并可被方便地获取并进行统计分析；载波监听单元,经过耦合接到电力线上,用于接收电力线上的HPLC载波通信报文信息；远程通讯单元,用于通过远程链路将终端连接到主站,以便主站获取统计分析数据；本发明设计合理、结构紧凑且使用方便。(The invention relates to a method and a device for analyzing the running quality of a local communication network, wherein the device comprises a terminal which is connected with the following modules through a communication line; the processor unit is used as the core of the HPLC carrier monitoring equipment, manages and controls other functional units and performs analysis, calculation and processing; the real-time clock unit is used for maintaining accurate date and time information, is not lost when power is down and provides standard time scale information for the statistical analysis function; the memory unit has the functions of a cache and a nonvolatile storage medium, is used for storing a large amount of monitored original message information, and can be conveniently obtained and subjected to statistical analysis; the carrier monitoring unit is coupled to the power line and used for receiving the HPLC carrier communication message information on the power line; the remote communication unit is used for connecting the terminal to the master station through a remote link so that the master station can acquire statistical analysis data; the invention has reasonable design, compact structure and convenient use.)

1. An apparatus for analyzing the quality of operation of a local communication network, comprising: the equipment comprises a terminal connected with the following modules through a communication line;

the processor unit is used as the core of the HPLC carrier monitoring equipment, manages and controls other functional units and performs analysis, calculation and processing;

the real-time clock unit is used for maintaining accurate date and time information, is not lost when power is down and provides standard time scale information for the statistical analysis function;

the memory unit has the functions of a cache and a nonvolatile storage medium, is used for storing a large amount of monitored original message information, and can be conveniently obtained and subjected to statistical analysis;

the carrier monitoring unit is coupled to the power line and used for receiving the HPLC carrier communication message information on the power line;

and the remote communication unit is used for connecting the terminal to the master station through a remote link so that the master station can obtain the statistical analysis data.

2. The apparatus for analyzing local communication network performance quality of claim 1, wherein: the terminal comprises

The carrier coupling circuit is used for being connected to a line of a 220V power line to be acquired;

the input end of the carrier system board is electrically connected with the output end of the carrier coupling circuit through the receiving filter circuit; the output end of the carrier system board is connected with the input end of the carrier coupling circuit;

the line to be collected outputs direct current through the AC-DC module so as to supply power to the carrier system board;

the carrier system board is respectively and electrically connected with a USB module, a WiFi module, an RJ45 module, a receiving indicating circuit and a sending indicating circuit.

3. The apparatus for analyzing local communication network performance quality of claim 2, wherein: the carrier system board is electrically connected with a 3V3 power supply circuit; in the 3V3 power supply circuit, the 12V output end of the input is divided into two paths after passing through the filter rectification circuit, one path is grounded after passing through a resistor R14, a R13 and a capacitor C21 which are connected in parallel, and the other path is connected to a terminal pin 5 of an integrated circuit U6; the output end of the resistor R14 is also connected with a terminal pin 4 of an integrated circuit U6;

in the integrated circuit U6, the pin 1 and the pin 6 are electrically connected through a capacitor C22 and a resistor R18 which are connected in series; the pin 2 is grounded, one path of the pin 3 is grounded through a resistor R19, and the other path of the pin is filtered and rectified through a resistor R20 and a capacitor C27 which are connected in parallel; the pin 6 is grounded through a reverse safety diode D5, and outputs a +3V3 end after passing through a filter L2 and a filter capacitor C23; the +3V3 end is connected with the other end of the filter rectification; the +3V3 end is grounded through an isolation C24 and an isolation C25 which are connected in parallel; therefore, the current is safely indicated, and meanwhile, after the direct current 12 is filtered and rectified, 3V3 is output after voltage reduction; and the inductor L1 and the parallel protection capacitors C32 and C33 form a filter rectification circuit.

4. The apparatus for analyzing local communication network performance quality of claim 1, wherein: the 12V output end is electrically connected with a 220V-to-12V AC-DC module which comprises an A, N end for inputting power; the A end is input through a fuse F1, one path is connected with the N end through a piezoresistor MOV1, the other path is connected with a pin 2 of an integrated circuit U1 through a thermistor PTC1, a pin 6 outputs a + signal, and a pin 5 outputs a-signal; a capacitor C1-C3, a resistor R31 and a diode D14 are connected in parallel between the pins 5 and 6, and the pin 5 is grounded; thereby realizing safe and stable change of current;

in the integrated circuit U1, pin 3 and pin 4 are electrically connected through a polar capacitor C4; the N end is connected with a pin 1;

in the USB module, an interface J9 is connected with a chip U13D; pins 4-6 of the interface J9 are connected with a pin 1 of an electrostatic diode D18; pins 1-3 of the interface J9 are respectively connected with pins 4, 2 and 3 of an electrostatic diode D18 to realize electrostatic protection;

in the interface J9, pin 1 is connected with pin 7 of the integrated circuit U4, pin 2 is connected with pin 1 of the integrated circuit D18 through a resistor R15, and pin 3 is connected with pin 4 of the integrated circuit U4 through a resistor R16;

in the integrated circuit U4, pin 7 is grounded through an isolation capacitor C14-15 connected in parallel; pin 7 is electrically connected with pin 6 and then grounded through an isolation capacitor C18; pin 3 is grounded, and pin 6 is grounded through a capacitor C16-17 connected in parallel; pin 29 is grounded; the pin 9 is connected with a VDD-2102 end through a resistor R9 for supplying power, and the pins 25 and 26 are respectively electrically connected with a USB-RXD and a USB-TXD for internal data transmission;

an RJ45 module including an integrated circuit T2, where pins 1-8 transmit output through interface J19; pins 3 and 6 are grounded through resistors R34 and R35 respectively; the pins 9 and 10 are respectively connected with +/-RD; the feet 15 and 16 are respectively connected with plus or minus TD; the pins 11 and 14 are respectively connected with a power supply VDD and the corresponding isolation capacitor to be grounded;

the WiFi module comprises an integrated circuit U5, and pins 1 and 3 of the integrated circuit U5 are respectively connected with a power supply 3V3 and a pin 8 through safety resistors R10 and R11; pin 8 is grounded through capacitors C19-20 and C285 connected in parallel; the pin 15 is grounded, the pin 16 is grounded through a resistor R12, the pin 18 is connected with a GPIO0 channel of the interface J31, and the pins 21 and 22 are respectively connected with a WIFI-TXD channel and a WIFI-RXD channel; thereby realizing wireless communication of data.

5. The apparatus for analyzing the operational quality of a local communication network as claimed in claim 2, wherein: the PHY module is electrically connected with the carrier system board; it includes an integrated circuit U14; in integrated circuit U14, pin 24 is connected to ground through R138; the pins 20-23 are respectively connected with a 3V3 power supply and grounded through corresponding capacitors; pin 5 connects RMII-CLK channel; the pin 15 is connected with a 3V3 power supply through a resistor R236 and is grounded through a capacitor C160; pins 8, 7, 10 and 11 are respectively connected with corresponding RMII-RXD0, RMII-RXD1, RMII-RXER and RMII-RXDV through corresponding resistors R31-35; the pins 16-18 are respectively connected with channels RMII-TXD0, TXD 1 and TXD EN; pin 13 is connected to the channel MDC, pin 13 is connected to the MDIO and is connected to 3V3 through a resistor R127; pin 25 is grounded, and pin 9 is connected with a 3v3 power supply; after the pins 1 and 19 are electrically connected, one path is connected to a 3V3 power supply through an inductor L10; one path is grounded through the parallel isolation capacitors C98, 155 and 158, and the pin 6 is grounded through the parallel capacitors C99 and C159.

6. A method for analyzing the operation quality of a local communication network is characterized in that: the power line carrier diagnosis for the power grid information acquisition system comprises the following steps:

s1, firstly, after the terminal is coupled and installed, the terminal can automatically search the peripheral HPLC network and pair according to the network synchronous clock NTB; then, the terminal acquires basic information of the successfully paired CCO, wherein the basic information comprises a distribution area number, a distribution area file, the number of network nodes and network topology; secondly, a carrier monitoring unit monitors a service message and a networking message of a carrier channel and collects a noise signal on a physical channel in real time;

and S2, the carrier system board statistically analyzes the information collected from the application layer, the link layer and the physical channel, outputs the HPLC quality analysis result, and uploads the result to the server through the remote module.

Technical Field

The invention relates to a method and equipment for analyzing the operation quality of a local communication network, in particular to the technical field of using High Performance Liquid Chromatography (HPLC) (high speed power line carrier) as local communication in a power consumption information acquisition system, and particularly relates to a method and equipment for analyzing the operation quality of an HPLC local communication network.

Background

The power consumption information acquisition system is a system for acquiring, processing and monitoring power consumption information of power consumers in real time, and realizes the functions of automatic acquisition of the power consumption information, abnormal metering monitoring, power quality monitoring, power consumption analysis and management, related information publishing, distributed energy monitoring, information interaction of intelligent power consumption equipment and the like. High speed Power Line carrier Communication (HPLC) is an important technology for improving the local Communication capability of the acquisition terminal, can comprehensively replace narrow-band Power Line carrier technology, micro-Power wireless technology and other technologies for local Communication of the acquisition terminal, and improves the speed, frequency and timeliness of low-voltage user data acquisition of the acquisition system. At present, the market of the domestic power utilization information acquisition system of the HPLC communication module draws up nearly 2 hundred million marks, the installation and operation amount is gradually enlarged, and the HPLC is realized by the basic interconnection technical standard, a large number of factory modules mixed in a field exist, so that a power supply enterprise can handle the operation condition of the HPLC communication network of one station area, including parameters such as channel quality, channel utilization rate, network stability and application service execution success rate, and an operation quality evaluation system for modules of different manufacturers is formed, so that the system becomes an urgent demand

Disclosure of Invention

The invention provides a method and equipment for analyzing the running quality of a local communication network, and firstly provides HPLC carrier monitoring equipment. The HPLC carrier monitoring equipment can be installed near a concentrator of a low-voltage distribution room, can automatically acquire electric energy meter files in a CCO of a target distribution room, can monitor and store most carrier communication messages interacting with the CCO, and further provides a method for analyzing and counting the running condition of an HPLC collection network according to the electric energy meter file information and the carrier monitoring messages.

In order to solve the problems, the technical scheme adopted by the invention is as follows:

a kind of equipment for analyzing the operation quality of local communication network, the equipment includes the terminal which connects the following modules through the communication line;

the carrier system board is used as the core of the HPLC carrier monitoring equipment, manages and controls other functional units and performs analysis, calculation and processing;

the real-time clock unit is used for maintaining accurate date and time information, is not lost when power is down and provides standard time scale information for the statistical analysis function;

the memory unit has the functions of a cache and a nonvolatile storage medium, is used for storing a large amount of monitored original message information, and can be conveniently obtained and subjected to statistical analysis;

the carrier monitoring unit is coupled to the power line and used for receiving the HPLC carrier communication message information on the power line;

and the remote communication unit is used for connecting the terminal to the master station through a remote link so that the master station can obtain the statistical analysis data.

As a further improvement of the above technical solution:

the terminal comprises a carrier coupling circuit which is used for being connected to a line of a 220V power line to be acquired;

the input end of the carrier system board is electrically connected with the output end of the carrier coupling circuit through the receiving filter circuit; the output end of the carrier system board is connected with the input end of the carrier coupling circuit;

the line to be collected outputs direct current through the AC-DC module to supply power to the carrier system board;

the carrier system board is respectively and electrically connected with a USB module, a WiFi module, an RJ45 module, a receiving indicating circuit and a sending indicating circuit;

in the 3V3 power supply circuit, the 12V output end of the input is divided into two paths after passing through the filter rectification circuit, one path is grounded after passing through a resistor R14, a R13 and a capacitor C21 which are connected in parallel, and the other path is connected to a terminal pin 5 of an integrated circuit U6; the output end of the resistor R14 is also connected with a terminal pin 4 of an integrated circuit U6;

in the integrated circuit U6, the pin 1 and the pin 6 are electrically connected through a capacitor C22 and a resistor R18 which are connected in series; the pin 2 is grounded, one path of the pin 3 is grounded through a resistor R19, and the other path of the pin is filtered and rectified through a resistor R20 and a capacitor C27 which are connected in parallel; the pin 6 is grounded through a reverse safety diode D5, and outputs a +3V3 end after passing through a filter L2 and a filter capacitor C23; the +3V3 end is connected with the other end of the filter rectification; the +3V3 end is grounded through an isolation C24 and an isolation C25 which are connected in parallel; therefore, the current is safely indicated, and meanwhile, after the direct current 12 is filtered and rectified, 3V3 is output in a voltage reduction mode. The inductor L1 and the protection capacitors C32 and C33 which are connected in parallel form a filter rectification circuit;

the 12V output end is electrically connected with a 220V-to-12V AC-DC module which comprises an A, N end for inputting power; the A end is input through a fuse F1, one path is connected with the N end through a piezoresistor MOV1, the other path is connected with a pin 2 of an integrated circuit U1 through a thermistor PTC1, a pin 6 outputs a + signal, and a pin 5 outputs a-signal; a capacitor C1-C3, a resistor R31 and a diode D14 are connected in parallel between the pins 5 and 6, and the pin 5 is grounded; thereby realizing safe and stable change of current;

in the integrated circuit U1, pin 3 and pin 4 are electrically connected through a polar capacitor C4; n terminal pin 1

In the USB module, an interface J9 is connected with a chip U13D; pin 4-6 of interface J9 connected to electrostatic diode

Tube D18, pin 1; pins 1-3 of the interface J9 are respectively connected with pins 4, 2 and 3 of an electrostatic diode D18 to realize electrostatic protection;

in the interface J9, pin 1 is connected with pin 7 of the integrated circuit U4, pin 2 is connected with pin 1 of the integrated circuit D18 through a resistor R15, and pin 3 is connected with pin 4 of the integrated circuit U4 through a resistor R16;

in the integrated circuit U4, pin 7 is grounded through an isolation capacitor C14-15 connected in parallel; pin 7 is electrically connected with pin 6 and then grounded through an isolation capacitor C18; pin 3 is grounded, and pin 6 is grounded through a capacitor C16-17 connected in parallel; pin 29 is grounded; the pin 9 is connected with a VDD-2102 end through a resistor R9 for supplying power, and the pins 25 and 26 are respectively electrically connected with a USB-RXD and a USB-TXD for internal data transmission;

an RJ45 module including an integrated circuit T2, where pins 1-8 transmit output through interface J19; pins 3 and 6 are grounded through resistors R34 and R35 respectively; the pins 9 and 10 are respectively connected with +/-RD; the feet 15 and 16 are respectively connected with plus or minus TD; the pins 11 and 14 are respectively connected with a power supply VDD and the corresponding isolation capacitor to be grounded;

the WiFi module comprises an integrated circuit U5, and pins 1 and 3 of the integrated circuit U5 are respectively connected with a power supply 3V3 and a pin 8 through safety resistors R10 and R11; pin 8 is grounded through capacitors C19-20 and C285 connected in parallel; the pin 15 is grounded, the pin 16 is grounded through a resistor R12, the pin 18 is connected with a GPIO0 channel of the interface J31, and the pins 21 and 22 are respectively connected with a WIFI-TXD channel and a WIFI-RXD channel; thereby realizing the wireless communication of data; the PHY module is electrically connected with the carrier system board; it includes an integrated circuit U14; in integrated circuit U14, pin 24 is connected to ground through R138; the pins 20-23 are respectively connected with a 3V3 power supply and grounded through corresponding capacitors; pin 5 connects RMII-CLK channel; the pin 15 is connected with a 3V3 power supply through a resistor R236 and is grounded through a capacitor C160; pins 8, 7, 10 and 11 are respectively connected with corresponding RMII-RXD0, RMII-RXD1, RMII-RXER and RMII-RXDV through corresponding resistors R31-35; the pins 16-18 are respectively connected with channels RMII-TXD0, TXD 1 and TXD EN; pin 13 is connected to the channel MDC, pin 13 is connected to the MDIO and is connected to 3V3 through a resistor R127; pin 25 is grounded, and pin 9 is connected with a 3v3 power supply; after the pins 1 and 19 are electrically connected, one path is connected to a 3V3 power supply through an inductor L10; one path is grounded through the parallel isolation capacitors C98, 155 and 158, and the pin 6 is grounded through the parallel capacitors C99 and C159.

A method for analyzing the operation quality of a local communication network is used for diagnosing a power line carrier of a power grid information acquisition system, and comprises the following steps:

s1, firstly, after the terminal is coupled and installed, the terminal can automatically search the peripheral HPLC network and pair according to the network synchronous clock NTB; then, the terminal acquires basic information of the successfully paired CCO, wherein the basic information comprises a distribution area number, a distribution area file, the number of network nodes and network topology; secondly, a carrier monitoring unit monitors a service message and a networking message of a carrier channel and collects a noise signal on a physical channel in real time;

and S2, the carrier system board statistically analyzes the information collected from the application layer, the link layer and the physical channel, outputs the HPLC quality analysis result, and uploads the result to the server through the remote module.

The invention has the advantages of reasonable design, low cost, firmness, durability, safety, reliability, simple operation, time and labor saving, capital saving, compact structure and convenient use.

Drawings

Fig. 1 is a functional block diagram of an HPLC carrier monitoring apparatus of the present invention.

Fig. 2 is a diagram of information available to an information acquisition module in an HPLC carrier monitoring apparatus of the present invention.

Fig. 3 is a diagram of an analysis result obtained by a statistical analysis module in the HPLC carrier monitoring device according to the information collected by the information collection module.

Fig. 4 is a control flow diagram of the present invention.

FIG. 5 is a schematic diagram of the architecture of the present invention.

Fig. 6 is a schematic diagram of the voltage of 3V3 according to the present invention.

Fig. 7 is a supply voltage schematic of the present invention.

FIG. 8 is a schematic diagram of the USB circuit of the present invention.

Fig. 9 is a schematic diagram of an RJ45 port circuit according to the present invention.

Fig. 10 is a schematic diagram of a WiFi circuit of the present invention.

Fig. 11 is a schematic diagram of a PHY module of the present invention.

Fig. 12 is a schematic of the terminal pin circuit of the present invention.

Fig. 13 is a carrier module interface schematic of the present invention.

Fig. 14 is a schematic diagram of a PLC interface of the present invention.

Detailed Description

Referring to fig. 1 to 14, the apparatus of the present embodiment includes terminals connected to the following modules through communication lines;

the carrier system board is used as the core of the HPLC carrier monitoring equipment, adopts a 32-bit processor of a Cotex-M4 core, manages and controls other functional units, and performs analysis, calculation and processing;

and the real-time clock unit is used for maintaining accurate date and time information, is not lost when power is down and provides standard time mark information for the statistical analysis function.

And the memory unit has the functions of a cache and a nonvolatile storage medium, is used for storing a large amount of monitored original message information, and can be conveniently obtained and subjected to statistical analysis.

The carrier monitoring unit is coupled to the power line and used for receiving the HPLC carrier communication message information on the power line;

and the remote communication unit is used for connecting the terminal to the master station through a remote link so that the master station can obtain the statistical analysis data.

The terminal comprises a carrier coupling circuit which is used for being connected to a line of a 220V power line to be acquired;

the input end of the carrier system board is electrically connected with the output end of the carrier coupling circuit through the receiving filter circuit; the output end of the carrier system board is connected with the input end of the carrier coupling circuit;

the line to be collected outputs direct current through the AC-DC module to supply power to the carrier system board;

the carrier system board is respectively and electrically connected with a USB module, a WiFi module, an RJ45 module, a receiving indicating circuit and a sending indicating circuit;

in the 3V3 power supply circuit, the 12V output end of the input is divided into two paths after passing through the filter rectification circuit, one path is grounded after passing through a resistor R14, a R13 and a capacitor C21 which are connected in parallel, and the other path is connected to a terminal pin 5 of an integrated circuit U6; the output end of the resistor R14 is also connected with a terminal pin 4 of an integrated circuit U6;

in the integrated circuit U6, the pin 1 and the pin 6 are electrically connected through a capacitor C22 and a resistor R18 which are connected in series; the pin 2 is grounded, one path of the pin 3 is grounded through a resistor R19, and the other path of the pin is filtered and rectified through a resistor R20 and a capacitor C27 which are connected in parallel; the pin 6 is grounded through a reverse safety diode D5, and outputs a +3V3 end after passing through a filter L2 and a filter capacitor C23; the +3V3 end is connected with the other end of the filter rectification; the +3V3 end is grounded through an isolation C24 and an isolation C25 which are connected in parallel; therefore, the current is safely indicated, and meanwhile, after the direct current 12 is filtered and rectified, 3V3 is output in a voltage reduction mode. The inductor L1 and the protection capacitors C32 and C33 which are connected in parallel form a filter rectification circuit;

the 12V output end is electrically connected with a 220V-to-12V AC-DC module which comprises an A, N end for inputting power; the A end is input through a fuse F1, one path is connected with the N end through a piezoresistor MOV1, the other path is connected with a pin 2 of an integrated circuit U1 through a thermistor PTC1, a pin 6 outputs a + signal, and a pin 5 outputs a-signal; a capacitor C1-C3, a resistor R31 and a diode D14 are connected in parallel between the pins 5 and 6, and the pin 5 is grounded; thereby realizing safe and stable change of current;

in the integrated circuit U1, pin 3 and pin 4 are electrically connected through a polar capacitor C4; n terminal pin 1

In the USB module, an interface J9 is connected with a chip U13D; pins 4-6 of the interface J9 are connected with a pin 1 of an electrostatic diode D18; pins 1-3 of the interface J9 are respectively connected with pins 4, 2 and 3 of an electrostatic diode D18 to realize electrostatic protection;

in the interface J9, pin 1 is connected with pin 7 of the integrated circuit U4, pin 2 is connected with pin 1 of the integrated circuit D18 through a resistor R15, and pin 3 is connected with pin 4 of the integrated circuit U4 through a resistor R16;

in the integrated circuit U4, pin 7 is grounded through an isolation capacitor C14-15 connected in parallel; pin 7 is electrically connected with pin 6 and then grounded through an isolation capacitor C18; pin 3 is grounded, and pin 6 is grounded through a capacitor C16-17 connected in parallel; pin 29 is grounded; the pin 9 is connected with a VDD-2102 end through a resistor R9 for supplying power, and the pins 25 and 26 are respectively electrically connected with a USB-RXD and a USB-TXD for internal data transmission;

an RJ45 module including an integrated circuit T2, where pins 1-8 transmit output through interface J19; pins 3 and 6 are grounded through resistors R34 and R35 respectively; the pins 9 and 10 are respectively connected with +/-RD; the feet 15 and 16 are respectively connected with plus or minus TD; the pins 11 and 14 are respectively connected with a power supply VDD and the corresponding isolation capacitor to be grounded;

the WiFi module comprises an integrated circuit U5, and pins 1 and 3 of the integrated circuit U5 are respectively connected with a power supply 3V3 and a pin 8 through safety resistors R10 and R11; pin 8 is grounded through capacitors C19-20 and C285 connected in parallel; the pin 15 is grounded, the pin 16 is grounded through a resistor R12, the pin 18 is connected with a GPIO0 channel of the interface J31, and the pins 21 and 22 are respectively connected with a WIFI-TXD channel and a WIFI-RXD channel; thereby realizing the wireless communication of data;

the PHY module is electrically connected with the carrier system board; it includes an integrated circuit U14; in integrated circuit U14, pin 24 is connected to ground through R138; the pins 20-23 are respectively connected with a 3V3 power supply and grounded through corresponding capacitors; pin 5 connects RMII-CLK channel; the pin 15 is connected with a 3V3 power supply through a resistor R236 and is grounded through a capacitor C160; pins 8, 7, 10 and 11 are respectively connected with corresponding RMII-RXD0, RMII-RXD1, RMII-RXER and RMII-RXDV through corresponding resistors R31-35; the pins 16-18 are respectively connected with channels RMII-TXD0, TXD 1 and TXD EN; pin 13 is connected to the channel MDC, pin 13 is connected to the MDIO and is connected to 3V3 through a resistor R127; pin 25 is grounded, and pin 9 is connected with a 3v3 power supply; after the pins 1 and 19 are electrically connected, one path is connected to a 3V3 power supply through an inductor L10; one path is grounded through the parallel isolation capacitors C98, 155 and 158, and the pin 6 is grounded through the parallel capacitors C99 and C159, so that the isolation capacitor value realizes the safety isolation or conduction.

The circuit of the invention has the following advantages: the circuit is safe and reliable, energy-saving and consumption-reducing, accurate in signal, temperature-protecting and high in networking efficiency.

The equipment has two working modes: monitoring a statistical mode and a noise detection mode;

monitoring a statistical mode, namely monitoring a carrier communication message; then, storing the carrier wave original message; secondly, analyzing, processing and statistically analyzing the carrier message; thirdly, storing various statistical analysis data; then, acquiring original data and statistical analysis data from the PC terminal;

a noise detection mode in which noise detection data is stored; then, obtaining stored original noise data from the PC; secondly, time domain and frequency domain calculation analysis is carried out on the noise data; and thirdly, graphically displaying the noise distribution and the intensity information on a display screen.

The invention is suitable for diagnosing the power line carrier of a power grid information acquisition system, and comprises the following steps:

s1, firstly, after the terminal is coupled and installed, the terminal can automatically search the peripheral HPLC network and pair according to the network synchronous clock NTB; then, the terminal acquires basic information of the successfully paired CCO, wherein the basic information comprises a distribution area number, a distribution area file, the number of network nodes and network topology; secondly, a carrier monitoring unit monitors a service message and a networking message of a carrier channel and collects a noise signal on a physical channel in real time;

s2, the carrier system board statistically analyzes the information collected from the application layer, the link layer and the physical channel, outputs the HPLC quality analysis result, and uploads the result to the server through the remote module;

the carrier application service and link layer performance analysis method comprises the steps of analyzing the application service completion quality and the network stability; the method for monitoring the quality of the carrier channel comprises the steps of monitoring the utilization rate of the carrier channel and the quality of a signal; and the fault logs monitored by the devices are synchronized by adopting a clock synchronization unit. The terminal comprises a power acquisition and monitoring system which uses an HPLC technology for networking. The terminal can monitor the carrier channel information through the HPLC module while communicating with the CCO, and the terminal is provided with a real-time clock system and a battery specially used for supplying power to the clock so as to provide time scale information used by log information. And the analysis result can be reported to the server in real time through the remote module.

The present invention has been described in sufficient detail for clarity of disclosure and is not exhaustive of the prior art.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; it is obvious as a person skilled in the art to combine several aspects of the invention. And such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.