An electric data acquisition system

Abstract

The application provides an electric data acquisition system, and relates to the technical field of smart meters, which comprises a first control module, which determines whether there is an abnormal metering of a meter group based on the line loss rate, meter type and firmware version of each electric energy meter; if there is, the first control module monitors the metering data and load data of a first target electric energy meter to determine whether the firmware of a second target electric energy meter needs to be upgraded; if it needs to be upgraded, the first control module generates a high-speed communication signal and sends it to an anti-distortion module; the anti-distortion module connects a target resistor between the positive signal line and the negative signal line in response to the high-speed communication signal; the first control module generates an electric data signal based on a firmware upgrade program and sends it to a first communication module at a high baud rate; the first communication module converts the received electric data signal and sends it to the second target electric energy meter through the positive signal line and the negative signal line, so that the acquisition system can complete the firmware upgrade at a high speed and stably.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of smart meters, in particular to an electric data acquisition system. BACKGROUND

[0002] With the continuous improvement of the intelligent level of the power system, the electric energy metering technology gradually develops from mechanical to electronic. As an important part of the smart grid terminal device, the single-phase smart electric energy meter has the technical characteristics of high metering accuracy, large data storage capacity, and strong remote communication capability, and can realize real-time monitoring and two-way interaction of user power consumption.

[0003] In terms of communication mode, the smart electric energy meter generally adopts two technical solutions of RS-485 bus and power line carrier communication (PLC). The RS-485 bus adopts master-slave half-duplex communication, has the advantages of simple structure and strong anti-interference ability, and in the prior art, 2400bps or 4800bps low baud rate parameters are configured to meet the basic data acquisition requirements. However, in some special application scenarios, it is necessary to support high-frequency data interaction functions such as electric meter data freezing, load curve recording, and event active reporting. The low transmission rate of the existing 485 communication leads to an extension of the data acquisition period, and it is difficult to meet the real-time communication requirements, especially firmware upgrade. SUMMARY

[0004] The purpose of the embodiment of the present application is to provide an electric data acquisition system to realize high-speed and stable completion of firmware upgrade.

[0005] In a first aspect, the present application provides an electric data acquisition system, which comprises a bus, a center device and a plurality of electric energy meters, the center device and the plurality of electric energy meters arranged in different industrial production sites are electrically connected to the positive signal line and the negative signal line of the bus,

[0006] The center device comprises a first control module, a first communication module and an anti-distortion module,

[0007] The first control module determines whether there is an electric meter group metering anomaly based on the line loss rate of each electric energy meter, the electric energy meter model and the firmware version;

[0008] If there is, the first control module monitors the metering data and load data of the first target electric energy meter to determine whether the second target electric energy meter needs to be upgraded;

[0009] If so, the first control module generates a high-speed communication signal and sends it to the anti-distortion module;

[0010] The anti-distortion module responds to the high-speed communication signal and connects the target resistor between the positive signal line and the negative signal line;

[0011] The first control module generates an electrical data signal based on the firmware upgrade program and sends the electrical data signal to the first communication module at a high baud rate;

[0012] The first communication module converts the received electrical data signal and sends the converted electrical data signal to the second target electric energy meter through the positive signal line and the negative signal line.

[0013] In an optional embodiment, the electric energy meter comprises a second control module, a second communication module,

[0014] The second communication module converts the electrical data signal received through the bus and sends the converted electrical data signal to the second control module;

[0015] The second control module parses the firmware upgrade program based on the received electrical data signal to complete the firmware upgrade of the second target electric energy meter.

[0016] In an optional embodiment, the anti-distortion module comprises a first resistor, a second resistor, and a switch chip,

[0017] The first control end of the first control module is connected to the first end of the first resistor, and the second end of the first resistor is connected to the control end of the switch chip,

[0018] The input end of the switch chip is connected to the first connection end of the negative signal line,

[0019] The output end of the switch chip is connected to the first end of the second resistor, and the second end of the second resistor is connected to the first connection end of the positive signal line,

[0020] The high-speed communication signal is input to the control end of the switch chip, so that the input end and the output end of the switch chip are conductive, and the second resistor is connected between the positive signal line and the negative signal line.

[0021] In an optional embodiment, the center device further comprises a power supply module, the first communication module comprises a transceiver chip, a first optoelectronic coupler, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, and a first capacitor,

[0022] The DI end of the transceiver chip is connected to the output end of the first optoelectronic coupler, the output end of the first optoelectronic coupler is connected to the first end of the third resistor, the second end of the third resistor is connected to the positive end of the power supply module, and the second end of the third resistor is also connected to the first end of the first capacitor,

[0023] The positive input end of the first optoelectronic coupler is connected to the negative end of the power supply module, the negative input end of the first optoelectronic coupler is connected to the first end of the fourth resistor, and the second end of the fourth resistor is connected to the second control end of the first control module,

[0024] The ground end of the first photoelectric coupler is connected with the first end of the first capacitor, and the second end of the first capacitor is connected with the negative end of the power supply module,

[0025] The VCC end of the transceiver chip is connected with the positive end of the power supply module, the B end of the transceiver chip is connected with the first connection end of the negative signal line, the A end of the transceiver chip is connected with the first connection end of the positive signal line through the fifth resistor, the sixth resistor is connected between the VCC end and the A end of the transceiver chip, and the seventh resistor is connected between the B end and the GND end of the transceiver chip.

[0026] In an optional implementation, the first communication module further includes a second capacitor, and the second capacitor is connected between the VCC end of the transceiver chip and the negative end of the power supply module.

[0027] In an optional implementation, the first communication module further includes a semiconductor discharge tube, and the semiconductor discharge tube is connected between the A end and the B end of the transceiver chip.

[0028] In an optional implementation, the power supply module includes a voltage stabilizing chip, a third capacitor and a fourth capacitor,

[0029] The input end of the voltage stabilizing chip is used to be connected with a power supply, the output end of the voltage stabilizing chip is used as the positive end of the power supply module, the ground end of the voltage stabilizing chip is used as the negative end of the power supply module,

[0030] The third capacitor is connected between the input end and the ground end of the voltage stabilizing chip, and the fourth capacitor is connected between the output end and the ground end of the voltage stabilizing chip.

[0031] In an optional implementation, the first control module determines whether there is a group metering abnormality by the following manner:

[0032] For each electric energy meter, it is determined whether the line loss rate difference of the electric energy meter in a first time interval is greater than a standard difference value;

[0033] If yes, the electric energy meter type and the firmware version of the electric energy meter are associated and added to an abnormal electric energy meter list;

[0034] For a data pair formed by the electric energy meter type and the firmware version in the abnormal electric energy meter list, a repeated value of the data pair is determined according to a second time interval;

[0035] If the repeated value is greater than a preset value, it is determined that there is a group metering abnormality, and the corresponding electric energy meter is determined as a second target electric energy meter.

[0036] In an optional implementation, the first target electric energy meter includes the second target electric energy meter and adjacent electric energy meters within a preset radius range from the second target electric energy meter,

[0037] Whether the second target electric energy meter needs to be upgraded in firmware is determined by the following manner:

[0038] input all the metering data and load data of the first target electric energy meter into the multi-source data cross-validation model to obtain an abnormality identification result output by the multi-source data cross-validation model;

[0039] If the abnormality identification result is firmware abnormality, it is determined that firmware upgrade is needed for the second target electric energy meter.

[0040] In a second aspect, the present application provides a central device, which comprises a first control module, a first communication module and an anti-distortion module,

[0041] The first control module determines whether there is metering abnormality in the electric meter group based on line loss rate, electric meter type and firmware version of each electric meter;

[0042] If there is, the first control module monitors the metering data and load data of the first target electric energy meter to determine whether firmware upgrade is needed for the second target electric energy meter;

[0043] If so, the first control module generates a high-speed communication signal and sends it to the anti-distortion module;

[0044] The anti-distortion module connects the target resistor between the positive signal line and the negative signal line in response to the high-speed communication signal;

[0045] The first control module generates an electric data signal based on the firmware upgrade program and sends it to the first communication module at a high baud rate;

[0046] The first communication module converts the received electric data signal and sends it to the second target electric energy meter through the positive signal line and the negative signal line.

[0047] The application provides an electric data acquisition system, which comprises a bus, a central device and a plurality of electric energy meters, the central device and the plurality of electric energy meters arranged at different industrial production sites are electrically connected with positive and negative signal lines of the bus, wherein the central device comprises a first control module, a first communication module and an anti-distortion module, the first control module determines whether there is an electric meter group metering abnormality based on line loss rates of the electric energy meters, electric energy meter models and firmware versions; if yes, the first control module monitors metering data and load data of a first target electric energy meter to determine whether firmware upgrading of a second target electric energy meter is needed; if yes, the first control module generates a high-speed communication signal and sends the high-speed communication signal to the anti-distortion module; the anti-distortion module connects a target resistor between the positive and negative signal lines in response to the high-speed communication signal; the first control module generates an electric data signal based on target data and sends the electric data signal to the first communication module at a high-speed baud rate; and the first communication module converts the received electric data signal and sends the electric data signal to the target electric energy meter through the positive and negative signal lines. The acquisition system transmits a firmware upgrading program in a high-speed communication mode, can automatically connect the anti-distortion module to the bus to avoid differential signal distortion and sampling errors, maintains the stability of high-speed communication of the acquisition system during firmware upgrading, timely repairs the system and ensures stable operation of the point data acquisition system. BRIEF DESCRIPTION OF DRAWINGS

[0048] In order to more clearly illustrate the technical solutions of the embodiments of the application, the following will briefly introduce the drawings needed to be used in the embodiments of the application. It should be understood that the following drawings only show some of the embodiments of the application, and therefore should not be regarded as a limitation to the scope. For those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0049] Figure 1 A structural schematic diagram of an electric data acquisition system provided by the embodiments of the application;

[0050] Figure 2 A structural schematic diagram of an electric energy meter provided by the embodiments of the application;

[0051] Figure 3 A circuit diagram of an RS-485 interface communication circuit provided by the embodiments of the application;

[0052] Figure 4 A circuit diagram of a power supply circuit provided by the embodiments of the application;

[0053] Figure 5 A flowchart of an electric energy meter firmware upgrading step provided by the embodiments of the application. DETAILED DESCRIPTION

[0054] The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application.

[0055] Figure 1 A structural schematic diagram of an electric data acquisition system provided by the present application is shown in FIG. 1. As shown in FIG. 1, the present application provides an electric data acquisition system, which includes a bus, a central device and a plurality of electric energy meters arranged at different industrial production sites. The central device and the plurality of electric energy meters are electrically connected to the positive signal line and the negative signal line of the bus. Figure 1

[0056] The electric energy meter herein can be a smart electric energy meter having the functions of electric energy metering, information storage and processing, real-time monitoring, automatic control, information interaction, etc. Advanced technologies such as a super-large scale digital signal processing chip, a storage device for permanently storing information, a fully isolated standard RS485 communication interface, carrier wave communication, infrared communication, a large-screen wide-temperature liquid crystal display and an information security encryption ESAM module are adopted.

[0057] Figure 2 A structural schematic diagram of an electric energy meter provided by the present application is shown in FIG. 2. In an embodiment, as shown in FIG. 2, the electric energy meter can include a second control module, a second communication module, an LCD display module, a metering module and a storage module. Figure 2

[0058] The second control module herein can include a micro control unit (MCU). The metering module can include an HT7032 high-precision multifunctional three-phase electric energy special metering chip. The storage module can include an EEPROM chip.

[0058] The second communication module herein can include an RS-485 interface communication circuit, a carrier wave communication circuit and an infrared communication circuit, which are respectively used to support the RS-485, carrier wave and infrared communication of the electric energy meter.

[0059] The electric energy meter RS-485 interface can support 1200, 2400, 4800, 9600 and 115200 baud rates. The existing electric energy meter can reach a communication distance of 1200 meters at a lower baud rate, but in the face of special scenarios such as data real-time, data volume or network scale and extreme environment, it is often unable to stably support the standard communication distance of 1200 meters to realize the high-speed communication of 115200, and the communication quality is reduced. Therefore, in the electric data acquisition system provided by the present application, the RS-485 interface communication circuit capable of supporting high-speed communication is arranged in the electric energy meter and the central device respectively.

[0060] The central device at least includes a first control module, a first communication module, an anti-distortion module and a power supply module. The first control module at least includes a micro control unit. The circuit of the first communication module of the central device and the second communication module of the electric energy meter can adopt the same circuit structure. Taking the central device as an example, the first communication module includes a transceiver chip, a first optoelectronic coupler, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor and a first capacitor.

[0061] The transceiver chip can be a half-duplex, low-power differential bus transceiver conforming to the RS-485 standard, to support long-distance, high-speed serial communication in complex environments. The specific model can be HM485NEESA.

[0062] The first optoelectronic coupler can be a high-speed optoelectronic coupler, to shorten the transmission delay, ensure accurate sampling of high-speed communication signals and avoid errors. The specific model can be ELS611.

[0063] Figure 3 A circuit diagram of an RS-485 interface communication circuit is provided for the embodiments of the present application. As shown in Figure 3 the sending part of the RS-485 interface communication circuit, the DI end of the transceiver chip is connected with the output end of the first optoelectronic coupler, the output end of the first optoelectronic coupler is connected with the first end of the third resistor, the second end of the third resistor is connected with the positive end of the power supply module, and the second end of the third resistor is also connected with the first end of the first capacitor. The third resistor is 3.9K ohms. The first capacitor is 0.1uF / 25V.

[0064] The positive input end of the first optoelectronic coupler is connected with the negative end of the power supply module, the negative input end of the first optoelectronic coupler is connected with the first end of the fourth resistor, and the second end of the fourth resistor is connected with the second control end of the first control module. The fourth resistor can be 330 ohms.

[0065] The ground end of the first optoelectronic coupler is connected with the first end of the first capacitor, and the second end of the first capacitor is connected with the negative end of the power supply module.

[0066] The VCC end of the transceiver chip is connected with the positive end of the power supply module, the B end of the transceiver chip is connected with the first connection end of the negative signal line, the A end of the transceiver chip is connected with the first connection end of the positive signal line through the fifth resistor, the sixth resistor is connected between the VCC end and the A end of the transceiver chip, and the seventh resistor is connected between the B end and the GND end of the transceiver chip. The fifth resistor can be a controllable sliding resistor, with adjustable resistance, and the model can be MZ11-10A300-600RM. The sixth resistor and the seventh resistor are both 10K ohms.

[0067] The first communication module further comprises a second capacitor connected between the VCC end of the transceiver chip and the negative end of the power supply module, for protecting the circuit from breakdown. The model of the second capacitor is 0.1uF / 25V.

[0068] Figure 4 A circuit diagram of a power supply circuit is provided for the embodiment of the present application. As shown in Figure 4 The power supply module at least comprises a power supply circuit, which comprises a voltage stabilizing chip, a third capacitor and a fourth capacitor. The voltage stabilizing chip can be a low-dropout linear voltage stabilizer, and specifically can be CN88L050OGR. The model of the third capacitor and the fourth capacitor is 0.1uF / 25V.

[0069] The input end of the voltage stabilizing chip is used for connection with a power supply, the output end of the voltage stabilizing chip serves as the positive end of the power supply module, and the ground end of the voltage stabilizing chip serves as the negative end of the power supply module. The third capacitor is connected between the input end and the ground end of the voltage stabilizing chip, and the fourth capacitor is connected between the output end and the ground end of the voltage stabilizing chip. The output end of the voltage stabilizing chip can provide a 5V voltage.

[0070] The second control end (RS485_TXD) of the first control module (MCU1) outputs the data to be transmitted as an electrical data signal at a high baud rate to the negative end (3 pin) of the first optocoupler. The first optocoupler outputs a TTL level signal to the DI end of the transceiver chip through the output end. The transceiver chip sends the differential signal converted and generated through the A end and the B end to the positive signal line and the negative signal line of the bus, so as to be sent to the electric energy meter through the bus.

[0071] The RS-485 interface communication circuit further comprises a receiving part and a switching part. The receiving part and the sending part are similar, and comprise a second optocoupler (ELS611), an eighth resistor, a ninth resistor and a fifth capacitor.

[0072] The positive end of the second optocoupler is connected with the first end of the eighth resistor, and the second end of the eighth resistor is connected with the positive end of the power supply module. The negative end of the second optocoupler is connected with the RO end of the transceiver chip. The output end of the second optocoupler is connected with the first end of the ninth resistor, and is connected with the RS485_RXD pin of the first control module. The second end of the ninth resistor is grounded through the fifth capacitor.

[0073] In this way, when the differential signal sent by the electric energy meter is input to the A end and the B end of the transceiver chip through the bus, the transceiver chip outputs a TTL signal through the RO end, and the electrical data signal is sent to the MCU1 through the output end of the second optocoupler.

[0074] The switching section includes a third optocoupler, a tenth resistor, and an eleventh resistor. The third optocoupler can be a standard optocoupler, specifically the EL816S1(D1). The input terminal of the receiver of the third optocoupler is connected to the positive terminal of the power supply module, and the output terminal of the receiver is connected to the RE and DE terminals of the transceiver chip, respectively. The output terminal of the receiver is also connected to the first terminal of the tenth resistor, and the second terminal of the tenth resistor is connected to the negative terminal of the power supply module.

[0075] The positive terminal of the light source of the third optocoupler is grounded, the negative terminal of the light source of the third optocoupler is connected to the first end of the eleventh resistor, and the second end of the eleventh resistor is connected to the RS485_CTL pin of MCU1, which is used to control the switching of communication modules of the transceiver chip.

[0076] To further ensure the integrity of the differential signal and avoid distortion that could affect the reception and sampling of communication signals, an anti-distortion module was also installed in the central equipment.

[0077] The anti-distortion module includes a first resistor, a second resistor, and a switching chip. The switching chip can be an analog switching chip, specifically a 74HC4066. The first resistor can be 10K ohms for current limiting. The second resistor is the terminating resistor connected between the positive and negative signal lines to eliminate signal reflections at the transmission line ends during high-speed communication, thereby avoiding waveform distortion and ensuring complete sampling. The second resistor can be 120 ohms.

[0078] The first control terminal of the first control module is connected to the first end of the first resistor, the second end of the first resistor is connected to the control terminal of the switch chip, the input terminal of the switch chip is connected to the first connection terminal of the negative signal line, the output terminal of the switch chip is connected to the first end of the second resistor, and the second end of the second resistor is connected to the first connection terminal of the positive signal line. The high-speed communication signal is input to the control terminal of the switch chip to make the input terminal and the output terminal of the switch chip conduct, so as to connect the second resistor between the positive signal line and the negative signal line.

[0079] Understandably, when high-speed communication is required in the acquisition system, a high-speed communication signal can be generated by MCU1 and sent to the anti-distortion module. The anti-distortion module responds to the high-speed communication signal by connecting the target resistor between the positive and negative signal lines.

[0080] Next, the first control module can generate electrical data signals based on the target data and send them to the first communication module at a high baud rate. The first communication module converts the received electrical data signals and sends them to the target energy meter via positive and negative signal lines. The high baud rate here can be 115200 baud.

[0081] In one embodiment of the present application, when the acquisition system needs to upgrade the firmware of the electric energy meter, since the firmware upgrade program is usually large, if the upgrade is performed at a rate of 9600bps, the transmission process is extremely time-consuming, and line instability during the transmission process can cause the upgrade to fail or even brick. At this time, a high-speed communication of 115200bps can be used.

[0082] As shown in Figure 5 In one specific embodiment, high-speed communication for firmware upgrade can be achieved by the following steps:

[0083] S1, the first control module determines whether there is a group metering abnormality of the electric energy meter based on the line loss rate of each electric energy meter, the type of the electric energy meter and the firmware version.

[0084] In step S1, the first control module can determine whether there is a group metering abnormality of the electric energy meter by the following method:

[0085] For each electric energy meter, it is determined whether the line loss rate difference of the electric energy meter in the first time interval is greater than the standard difference value. If yes, the electric energy meter type and the firmware version associated with the electric energy meter are added to the abnormal electric energy meter table.

[0086] For the data pair formed by the electric energy meter type and the firmware version in the abnormal electric energy meter table, the repetition value of the data pair is determined according to the second time interval. If the repetition value is greater than the preset value, it is determined that there is a group metering abnormality of the electric energy meter, and the corresponding electric energy meter is determined as the second target electric energy meter.

[0087] If a large number of electric energy meters are found to have metering abnormalities and all have the same type and firmware version, it indicates that the electric energy meter has a metering program abnormality, and needs to be repaired and upgraded to ensure the accuracy and reliability of the electric data acquisition.

[0088] S2, if yes, the first control module monitors the metering data and load data of the first target electric energy meter to determine whether the firmware of the second target electric energy meter needs to be upgraded.

[0089] The first target electric energy meter includes the second target electric energy meter and the adjacent electric energy meters within a preset radius range from the second target electric energy meter.

[0090] In step S2, whether the firmware of the second target electric energy meter needs to be upgraded can be determined by the following method:

[0091] All the metering data and load data of the first target electric energy meter are input into the multi-source data cross-validation model to obtain an abnormality identification result output by the multi-source data cross-validation model. The metering data can include total active power, split-phase power (A, B, and C phases), four-quadrant reactive power, voltage, current, power factor, and the like. The load data can include daily power supply of a transformer area, total daily power consumption of all users under the transformer area, frozen power collected according to a certain time interval, maximum demand, and corresponding occurrence time, and the like.

[0092] The multi-source data cross-validation model can be a mathematical model or an AI model trained based on a deep learning model, which is not limited here.

[0093] If the abnormality identification result is a firmware abnormality, it is determined that the firmware upgrade of the second target electric energy meter is needed. The abnormality identification result can be a specific probability value.

[0094] It should be noted that the high-speed communication scheme provided in the present application can also be used in other cases where firmware upgrade is needed, such as conventional data upgrade, addition of new business functions, change of communication protocol or specification, and the like, which are not limited.

[0095] S3. If needed, the first control module generates a high-speed communication signal and sends it to the anti-distortion module.

[0096] S4. The anti-distortion module connects the target resistor between the positive signal line and the negative signal line in response to the high-speed communication signal.

[0097] S5. The first control module generates an electrical data signal based on the firmware upgrade program and sends it to the first communication module at a high-speed baud rate.

[0098] S6. The first communication module converts the received electrical data signal and sends it to the second target electric energy meter through the positive signal line and the negative signal line.

[0099] S7. The second control module parses the firmware upgrade program based on the received electrical data signal to complete the firmware upgrade of the second target electric energy meter.

[0100] In this way, the transmission time can be shortened to more than 1 / 10 of the original, greatly improving the success rate and efficiency of the upgrade.

[0101] The application provides an electric data acquisition system, RS485 interface communication should comply with DL / T698.45 protocol, can realize 1200, 2400, 4800, 9600, 115200 between baud rate switching, and the acquisition system in high speed communication mode, can automatically access the anti-distortion module to the bus, to avoid differential signal distortion and sampling error, improve the stability of the acquisition system in high speed communication in special environment, meet the high frequency data interaction demand. After testing, the electric data acquisition system provided by the application can still stably use 115200 baud rate communication under the condition of high temperature +70 DEG C, low temperature-40 DEG C, and the communication distance can reach 1200m.

[0102] In another embodiment of the application, in order to ensure the stability of the acquisition system high speed communication, the RS-485 interface communication circuit and the interface of the bus are additionally provided with protection. The first / second communication module further comprises a semiconductor discharge tube connected between the A end and the B end of the transceiver chip. The model of the semiconductor discharge tube can be LTVB6.8CJP, and the junction capacitance is about 50PF, which is used for protecting the communication line.

[0103] In the embodiments provided by the application, it should be understood that the disclosed device and method can be implemented in other ways. The device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There can be another division manner in actual implementation, or a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the displayed or discussed mutual couplings or direct couplings or communication connections between the units can be indirect couplings or communication connections through some interfaces, devices or units, and can be electrical, mechanical or in other forms.

[0104] In addition, the units described as separate components can or can not be physically separate, and the components displayed as units can or can not be physical units, that is, they can be located in one place, or can be distributed on a plurality of network units. According to actual needs, some or all of the units can be selected to achieve the purpose of the embodiment scheme.

[0105] Furthermore, the function modules in each embodiment of the application can be integrated together to form an independent part, or each module can exist independently, or two or more modules can be integrated to form an independent part.

[0106] It should be noted that, if the functions are implemented in the form of software function modules and sold or used as independent products, they can be stored in a computer readable storage medium. Based on such understanding, the technical solutions of the present application can be embodied in the form of a software product in essence or in the form of a part or the technical solutions of the present application that make contributions to the prior art. The computer software product is stored in a storage medium, includes a plurality of instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present application. The foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (Read-Only Memory, ROM), a random access memory (Random Access Memory, RAM), a magnetic disk or an optical disk, and various media that can store program codes.

[0107] In this document, relational terms such as first and second and the like can merely be used to distinguish one entity or action from another, without necessarily requiring or implying any such actual relationship or order between or among the entities or actions.

[0108] The above only describes the embodiments of the present application and is not used to limit the protection scope of the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An electrical data acquisition system, characterized by The collection system comprises a bus, a central device and a plurality of electric energy meters arranged at different industrial production sites, the central device and the plurality of electric energy meters are electrically connected to positive and negative signal lines of the bus, The central device comprises a first control module, a first communication module and an anti-distortion module, The first control module determines whether there is an electric meter group measurement anomaly based on line loss rates of the electric energy meters, electric energy meter models and firmware versions, wherein the first control module determines whether there is an electric meter group measurement anomaly by: determining, for each electric energy meter, whether a line loss rate difference of the electric energy meter in a first time interval is greater than a standard difference value; if yes, adding the electric energy meter model and the firmware version associated with the electric energy meter to an abnormal electric energy meter table; for a data pair formed by the electric energy meter model and the firmware version in the abnormal electric energy meter table, determining a repetition value of the data pair according to a second time interval; if the repetition value is greater than a preset value, it is determined that there is an electric meter group measurement anomaly, and the corresponding electric energy meter is a second target electric energy meter; If yes, the first control module monitors the measurement data and load data of the first target electric energy meter to determine whether the second target electric energy meter needs to be upgraded in firmware, the first target electric energy meter comprising the second target electric energy meter and adjacent electric energy meters within a preset radius range from the second target electric energy meter; If yes, the first control module generates a high-speed communication signal and sends it to the anti-distortion module; The anti-distortion module connects a target resistor between the positive and negative signal lines in response to the high-speed communication signal; The first control module generates an electric data signal based on a firmware upgrade program and sends it to the first communication module at a high baud rate; The first communication module converts the received electric data signal and sends it to the second target electric energy meter through the positive and negative signal lines.

2. The system of claim 1, wherein, The electric energy meter comprises a second control module and a second communication module, The second communication module converts the electric data signal received through the bus and sends it to the second control module; The second control module parses the firmware upgrade program based on the received electric data signal to complete the firmware upgrade of the second target electric energy meter.

3. The system of claim 2, wherein, The anti-distortion module comprises a first resistor, a second resistor and a switch chip, The first control terminal of the first control module is connected to the first end of the first resistor, and the second end of the first resistor is connected to the control terminal of the switch chip, The input terminal of the switch chip is connected to the first connection terminal of the negative signal line, The output terminal of the switch chip is connected to the first end of the second resistor, and the second end of the second resistor is connected to the first connection terminal of the positive signal line, The high-speed communication signal is input to the control terminal of the switch chip, so that the input terminal and the output terminal of the switch chip are conductive, and the second resistor is connected between the positive and negative signal lines.

4. The system of claim 1, wherein, The central device further comprises a power supply module, and the first communication module comprises a transceiver chip, a first optoelectronic coupler, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor and a first capacitor, The DI end of the transceiver chip is connected with the output end of the first optoelectronic coupler, the output end of the first optoelectronic coupler is connected with the first end of the third resistor, the second end of the third resistor is connected with the positive pole end of the power supply module, and the second end of the third resistor is also connected with the first end of the first capacitor, The positive pole input end of the first optoelectronic coupler is connected with the negative pole end of the power supply module, the negative pole input end of the first optoelectronic coupler is connected with the first end of the fourth resistor, and the second end of the fourth resistor is connected with the second control end of the first control module, The ground end of the first optoelectronic coupler is connected with the first end of the first capacitor, and the second end of the first capacitor is connected with the negative pole end of the power supply module, The VCC end of the transceiver chip is connected with the positive pole end of the power supply module, the B end of the transceiver chip is connected with the first connection end of the negative signal line, the A end of the transceiver chip is connected with the first connection end of the positive signal line through the fifth resistor, the sixth resistor is connected between the VCC end and the A end of the transceiver chip, and the seventh resistor is connected between the B end and the GND end of the transceiver chip.

5. The system of claim 4, wherein, The first communication module further comprises a second capacitor, which is connected between the VCC end of the transceiver chip and the negative pole end of the power supply module.

6. The system of claim 4, wherein, The first communication module further comprises a semiconductor discharge tube, which is connected between the A end and the B end of the transceiver chip.

7. The system of claim 4, wherein, The power supply module comprises a voltage stabilizing chip, a third capacitor and a fourth capacitor, The input end of the voltage stabilizing chip is used for being connected with a power supply, the output end of the voltage stabilizing chip is used as the positive pole end of the power supply module, the ground end of the voltage stabilizing chip is used as the negative pole end of the power supply module, The third capacitor is connected between the input end and the ground end of the voltage stabilizing chip, and the fourth capacitor is connected between the output end and the ground end of the voltage stabilizing chip.

8. The system of claim 1, wherein, Whether the second target electric energy meter needs to be upgraded in firmware is determined in the following manner: all the metering data and load data of the first target electric energy meter are input into the multi-source data cross-validation model to obtain an abnormality identification result output by the multi-source data cross-validation model; if the abnormality identification result is firmware abnormality, it is determined that the second target electric energy meter needs to be upgraded in firmware.

9. A central device, characterized by The central device comprises a first control module, a first communication module and an anti-distortion module, The first control module determines whether there is a group metering abnormality of electric energy meters based on line loss rates, electric energy meter types and firmware versions of the electric energy meters, wherein the first control module determines whether there is a group metering abnormality of electric energy meters in the following manner: for each electric energy meter, it is determined whether a line loss rate difference of the electric energy meter in a first time interval is greater than a standard difference value; if yes, the electric energy meter type and the firmware version of the electric energy meter are associated and added to an abnormal electric energy meter list; for a data pair formed by the electric energy meter type and the firmware version in the abnormal electric energy meter list, a repeated value of the data pair is determined according to a second time interval; if the repeated value is greater than a preset value, it is determined that there is a group metering abnormality of electric energy meters, and the corresponding electric energy meter is determined as a second target electric energy meter; if yes, the first control module monitors metering data and load data of the first target electric energy meter to determine whether the second target electric energy meter needs to be upgraded in firmware, the first target electric energy meter comprising the second target electric energy meter and adjacent electric energy meters within a preset radius range from the second target electric energy meter; If necessary, the first control module generates a high-speed communication signal and sends it to the anti-distortion module; The anti-distortion module connects the target resistance between the positive signal line and the negative signal line in response to the high-speed communication signal; The first control module generates an electrical data signal based on the firmware upgrade program and sends it to the first communication module at a high baud rate; The first communication module converts the received electrical data signal and sends it to the second target electric energy meter through the positive signal line and the negative signal line.

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