CN113640730A - Intelligent Internet of things meter electric energy error verification system and method - Google Patents
Intelligent Internet of things meter electric energy error verification system and method Download PDFInfo
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Abstract
The invention provides an electric energy error calibration system and method for an intelligent Internet of things meter, and the system comprises an upper computer, a communication server, a device power source, a device standard meter and a pulse error pure digital calculation unit, wherein the upper computer is connected with the communication server, the communication server is respectively connected with the device power source, the device standard meter and the pulse error pure digital calculation unit, the device power source is connected with the device standard meter, the device standard meter and the communication server are respectively connected with the pulse error pure digital calculation unit, and the device standard meter is also connected with an external intelligent Internet of things meter to be detected. The technical method provided by the invention solves the problems that less external intelligent Internet of things is supported in the electric energy error calibration process, the calibration error occurrence probability is high, and the stability and the reliability are low.
Description
Technical Field
The invention relates to the field of intelligent Internet of things, in particular to a system and a method for detecting electric energy errors of an intelligent Internet of things meter.
Background
Along with the development of the intelligent Internet of things, a large amount of intelligent Internet of things meters are born, and the intelligent Internet of things meters are additionally provided with built-in Bluetooth modules for wireless measurement and wireless communication, and auxiliary terminals are cancelled.
The wireless metering scheme of the existing intelligent Internet of things meter comprises a light pulse metering scheme and a Bluetooth metering scheme. In the implementation process of the optical pulse metering scheme, pulse time delay distortion acquired by a photoelectric head and photoelectric pulse conversion distortion occur, and metering errors are generated under the two distortion conditions; the bluetooth metering scheme has the advantages of low precision requirement and low cost compared with the optical pulse metering scheme, but has the following problems:
within the maximum transmission distance range of the Bluetooth module, nearly hundreds of groups of pulse transmission exist, mutual interference exists between the groups, different time delays and even data packet loss can be generated, and the traditional technical solution is to adopt special radio frequency for each group of Bluetooth pairing. However, the frequency band of the international standard Bluetooth is 2402 MHz-2408 MHz, if each pair instantly uses one frequency point, at most 79 points are supported, and the requirement of the verification system is not met.
Part of the solutions of the traditional technology are to increase the matched special radio frequency points by using the marginal working bandwidths 2360 Mhz-2400 Mhz and 2480 MHz-2500 MHz of the Bluetooth frequency band in the international specification, but the marginal frequency bands are not in the range of the internationally specified legal frequency bands, and may be occupied by other equipment to bring external interference, so that the stability and reliability of the verification process are greatly reduced.
The principle that the conventional technology utilizes the Bluetooth technology to carry out electric energy error verification is as follows: the verification of the electric energy error is realized by switching between a BLE mode and a 2.4G mode of the Bluetooth technology. However, in the actual application process, due to the problem of event priority, errors may occur in the switching between the BLE mode and the 2.4G mode, and a large random error may occur in the verification result of the power error.
In the process of calibrating in the traditional technology, the Bluetooth/pulse converter unit converts the digital signal of the intelligent Internet of things meter into an analog pulse signal, which can cause errors, and the error calculation unit also has errors in the link of analog signal counting. Meanwhile, the stability of the system crystal oscillator has certain influence on the accuracy of an error calculation result.
Disclosure of Invention
The invention provides an intelligent Internet of things meter electric energy error verification system and method, and aims to solve the problems of high probability of occurrence of verification errors and low stability and reliability in an electric energy error verification process.
An intelligent thing allies oneself with meter electric energy error verification system, includes: the system comprises an upper computer, a communication server, a device power source, a device standard meter and a pulse error pure digital calculation unit, wherein the upper computer is connected with the communication server, the communication server is respectively connected with the device power source, the device standard meter and the pulse error pure digital calculation unit, the device power source is connected with the device standard meter, the device standard meter and the communication server are respectively connected with the pulse error pure digital calculation unit, and the device standard meter is also connected with an external intelligent thing connection meter to be detected;
the communication server provides network communication service for the upper computer, the device power source, the device standard table and the pulse error pure digital computing unit;
the upper computer sends a first working instruction to the device power source, a second working instruction to the device standard meter, a third working instruction to the pulse error pure digital calculation unit and a fourth working instruction to the external intelligent Internet of things meter through the communication server, electric energy error calibration of the external intelligent Internet of things meter is completed, and an error calibration result is displayed;
when the device power source receives a first working instruction sent by the upper computer, a voltage signal and a current signal are provided for the device standard meter and the external intelligent Internet of things;
when the device standard meter receives the voltage signal, the current signal and a second working instruction sent by the upper computer, the external intelligent Internet of things meter receives the voltage signal, the current signal and a fourth working instruction sent by the upper computer and sends an electric energy digital signal to the pulse error pure digital computing unit, and the device standard meter is used for providing a standard electric energy pulse signal for the pulse error pure digital computing unit;
and when the pulse error pure digital calculation unit receives a third working instruction sent by the upper computer, the received standard electric energy pulse signal provided by the device standard meter is converted into a standard electric energy digital signal, and an electric energy error result is calculated through the standard electric energy digital signal and the electric energy digital signal.
An intelligent Internet of things meter electric energy error calibration method is applied to a pulse error pure digital calculation unit in the intelligent Internet of things meter electric energy error calibration system, and comprises the following steps:
receiving a standard electric energy pulse signal provided by a standard meter of the device;
receiving an electric energy digital signal sent by an external intelligent Internet of things meter which is uniquely connected with the pulse error pure digital computing unit;
converting the standard electric energy pulse signal into a standard electric energy digital signal, and calculating an electric energy error result through the standard electric energy digital signal and the electric energy digital signal;
sending the electric energy error result to an upper computer for storage;
the standard electric energy pulse signal provided by the standard meter of the circulating receiving device is transmitted to the step of sending the electric energy error result to the upper computer for storage until the circulating times are equal to the preset times;
and after the circulation process is finished, the pulse error pure digital calculation unit is disconnected with the external intelligent Internet of things meter, the electric energy error result obtained by each circulation is sent to the upper computer, the upper computer analyzes according to each electric energy error result, and the analysis result is displayed.
According to the system and the method for detecting the electric energy error of the intelligent Internet of things meter, a pulse converter unit in the traditional technology is eliminated, the error caused in the process that the pulse converter unit converts a digital signal into an analog pulse signal is eliminated, and the probability of the error in the electric energy error detection process is reduced; the standard pulse signal output by the standard meter of the device and the digital signal output by the external intelligent Internet of things meter are directly used for participating in electric energy error calculation, an error calculation unit in the traditional technology is not used for counting the analog pulse signal, the error of the error calculation unit in the process of counting the analog pulse signal is eliminated, and the error occurrence probability in the electric energy error verification process is also reduced.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments of the present invention will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive labor.
Fig. 1 is a diagram of an intelligent electricity error verification system for an internet of things according to an embodiment of the present invention;
FIG. 2 is another schematic diagram of the electric energy error calibration system of the intelligent Internet of things meter according to an embodiment of the invention;
FIG. 3 is another schematic diagram of the electric energy error calibration system of the intelligent Internet of things meter according to an embodiment of the present invention;
FIG. 4 is a flow chart of a method of calculating a power error according to an embodiment of the present invention;
FIG. 5 is a flowchart of a method for calculating the time of day error according to an embodiment of the present invention;
FIG. 6 is a flow chart of a Bluetooth device establishing a connection in one embodiment of the present invention;
FIG. 7 is a flow chart of the pulse error pure digital unit for calculating the power error according to an embodiment of the present invention;
FIG. 8 is a flow chart of a pulse error pure digital unit to calculate a daily timing error in accordance with one embodiment of the present invention;
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Implementations of the present application are described in detail below with reference to the following detailed drawings:
in one embodiment, as shown in fig. 1, an intelligent system for calibrating an electric energy error of an internet of things meter is provided, which includes an upper computer 100, a communication server 101, a device power source 102, a device standard meter 103, and a pulse error pure digital calculation unit 104. The upper computer is connected with the communication server, the communication server is respectively connected with the device power source, the device standard meter and the pulse error pure digital computing unit, the device power source is connected with the device standard meter, the device standard meter and the communication server are respectively connected with the pulse error pure digital computing unit, and the device standard meter is further connected with the detected external intelligent thing allies oneself with table 105.
The external intelligent Internet of things meter comprises a Bluetooth module, a metering module, a management module, a display module, an expansion module and the like, and has the functions of metering electric energy, processing data, monitoring in real time, automatically controlling, sensing environment, interacting information, routing energy and the like.
The communication server provides network communication service for the upper computer, the device power source, the device standard table and the pulse error pure digital computing unit;
the upper computer sends a first working instruction to the device power source through the communication server, sends a second working instruction to the device standard meter, sends a third working instruction to the pulse error pure digital calculation unit, and sends a fourth working instruction to the external intelligent Internet of things meter, so that electric energy error calibration of the external intelligent Internet of things meter is completed, and an error calibration result is displayed; the upper computer can be a desktop computer, a notebook computer, a tablet personal computer, a mobile phone, a PDA and the like, can communicate with the communication server, and can be provided with third-party operating software or hardware equipment with browser software; if the upper computer is provided with the intelligent Internet of things meter electric energy error verification system operating software, the user enables the upper computer to send a working instruction by operating the client software; and if the upper computer is not provided with the intelligent Internet of things meter electric energy error verification system operating software, the upper computer can use a browser carried by hardware equipment to access the communication server and send a working instruction.
When the device power source receives a first working instruction sent by the upper computer, a voltage signal and a current signal are provided for the device standard meter and the external intelligent Internet of things;
when the device standard meter receives the voltage signal, the current signal and a second working instruction sent by the upper computer, the external intelligent Internet of things meter receives the voltage signal, the current signal and a fourth working instruction sent by the upper computer and sends an electric energy digital signal to the pulse error pure digital computing unit, and the device standard meter is used for providing a standard electric energy pulse signal for the pulse error pure digital computing unit;
the electric energy digital signal sent by the external intelligent Internet of things meter to the pulse error sequential digital calculation unit includes but is not limited to: active pulse, reactive pulse, harmonic pulse.
And when the pulse error pure digital calculation unit receives a third working instruction sent by the upper computer, the received standard electric energy pulse signal provided by the device standard meter is converted into a standard electric energy digital signal, and an electric energy error result is calculated through the standard electric energy digital signal and the electric energy digital signal.
The intelligent Internet of things meter electric energy error verification system cancels a pulse converter unit in the traditional technology, eliminates errors caused in the process that the pulse converter unit converts a digital signal into an analog pulse signal, and reduces the probability of errors in the electric energy error verification process; the standard pulse signal output by the standard meter of the device and the digital signal output by the external intelligent Internet of things meter are directly used, the process of counting the analog pulse signal by the error calculation unit in the traditional technology is not adopted, the error of the error calculation unit in the process of counting the analog pulse signal is eliminated, and the error occurrence probability in the process of electric energy error detection is also reduced.
In an embodiment, as shown in fig. 2, the system for calibrating the electric energy error of the intelligent internet of things further includes a precision time-base source 106, and the precision time-base source is respectively connected to the communication server and the pure digital pulse error calculation unit;
the upper computer is also used for sending a fourth working instruction to the precision time-based source through the communication server;
the precision time base source is used for providing a standard daily timing pulse signal to the pulse error pure digital calculation unit when receiving the fourth working instruction sent by the upper computer;
the precise time-base source is also used for providing high-precision clock signals for other components or modules in the intelligent Internet of things meter electric energy error calibration system;
the pulse error pure digital calculating unit is also used for receiving a daily timing pulse digital signal sent by the external intelligent Internet of things, converting the standard daily timing pulse signal into a standard daily timing digital signal, calculating a daily timing error result through the standard daily timing digital signal and the daily timing pulse digital signal,
the upper computer can select to only perform electric energy error calculation, or select to only perform daily timing error calculation, or simultaneously perform electric energy error calculation and daily timing error calculation.
After the running time of the external intelligent internet of things meter is long, the difference value between the internal clock and the standard time is larger and larger, the difference value between the internal clock and the standard time influences the accuracy of electric energy data metering, the embodiment performs daily timing error verification and analyzes according to an error verification result to obtain a conclusion, data support is provided for calibration of daily timing of the external intelligent internet of things meter, and the error of electric energy metering of the external intelligent internet of things meter can be further reduced.
In an embodiment, as shown in fig. 3, the system for calibrating the electric energy error of the intelligent internet of things further includes an error display unit 107, and the error display unit is respectively connected to the communication server and the pure digital calculation unit for pulse error;
the error display unit is used for displaying the electric energy error result and/or the daily timing error result which are/is obtained by the pulse error pure digital calculation unit, and sending the error result to the upper computer for storage;
the error display unit includes but is not limited to one of an LCD panel, an LED panel, an OLED panel or a QLED panel, and may also be a combination of multiple display panels; but also a large panel consisting of one display panel or a plurality of display panels.
The error display unit can also receive the standard electric energy digital signal and the electric energy digital signal forwarded by the pulse error pure digital calculation unit and display the standard electric energy digital signal and the electric energy digital signal in a wave form diagram mode;
the error display unit can also receive the standard daily timing digital signal and the daily timing pulse digital signal forwarded by the pulse error pure digital calculation unit and display the standard daily timing digital signal and the daily timing digital signal in a form of oscillogram;
when the electric energy error verification process is finished, the external intelligent Internet of things meter is disconnected with the pulse error pure digital computing unit, the pulse error pure digital computing unit enters a dormant state, the error display unit can enter the dormant state according to preset rules in the upper computer or obtain historical electric energy error results which are stored in the upper computer for display.
The upper computer can selectively display the electric energy error digital result and/or the daily timing error digital result which are nearest to the current time only by the error display unit, or display the electric energy error digital result and/or the daily timing error digital result in a preset time period from the current time, or do not display the content to enter the sleep mode.
In one embodiment, the number of the pulse error pure digital computing units is greater than or equal to the number of the external intelligent internet of things tables, and one external intelligent internet of things table is uniquely connected with one pulse error pure digital computing unit.
The system comprises at least one pulse error pure digital computing unit, and at least one external intelligent Internet of things meter can carry out electric energy error verification; when the number of the pulse error pure digital computing units is equal to that of the external intelligent Internet of things tables, the pulse error pure digital computing units and the external intelligent Internet of things tables are just in one-to-one correspondence; when the number of the pulse error pure digital computing units is larger than that of the external intelligent Internet of things tables, the pulse error pure digital computing units with the number equal to that of the external intelligent Internet of things tables can be selected in the upper computer to establish a one-to-one correspondence relationship, and the rest unselected pulse error pure digital computing units enter a sleep mode.
According to the embodiment, the number of the pulse error pure digital computing units which enter the working state and the number of the pulse error pure digital computing units which enter the sleep mode can be flexibly determined according to the number of the external intelligent Internet of things tables, so that the hardware resources are flexibly utilized, the energy consumption of the whole system in operation is further reduced, and the service life of the pulse error pure digital computing units is prolonged.
Wherein the error display unit is not necessarily included; if the error display units are included, the number of the started error display units can be selected in the upper computer, the started error display units enter a working mode, and the un-started error display units enter a sleep mode.
The single error display unit can circularly display the electric energy error results or daily timing error results sent by the plurality of pulse error pure digital calculating units; and the started error display unit is configured in the upper computer to display an electric energy error result or a daily timing error result sent by at least one pulse error pure digital calculation unit.
In an embodiment, as shown in fig. 4, there is provided an intelligent internet of things meter electric energy error verification method applied to a pulse error pure digital computing unit in the intelligent internet of things meter electric energy error verification system, including the following steps S101 to S106:
and S101, receiving a standard electric energy pulse signal provided by the standard meter of the device.
And S102, receiving an electric energy digital signal sent by an external intelligent Internet of things meter which has a unique connection relation with the pulse error pure digital computing unit.
S103, converting the standard electric energy pulse signal into a standard electric energy digital signal, and calculating an electric energy error result through the standard electric energy digital signal and the electric energy digital signal.
And S104, sending the electric energy error result to an upper computer for storage.
And S105, circularly receiving the standard electric energy pulse signal provided by the standard meter of the device to send the electric energy error result to the step of storing by the upper computer until the number of circulation times is equal to the preset number of times.
And S106, after the circulation process is finished, disconnecting the pulse error pure digital calculation unit from the external intelligent Internet of things meter, sending the electric energy error result obtained by each circulation to the upper computer, and allowing the upper computer to analyze according to each electric energy error result and display the analysis result.
The upper computer can analyze whether all the error results are within a preset fault tolerance range or not and the ratio of the number of the electric energy error results exceeding the fault tolerance range to the number of all the electric energy error verification results according to the electric energy error results detected in different time periods and the preset electric energy error fault tolerance range, and judges whether the external intelligent IOT meter can be continuously used for electric energy metering or not according to the analysis results.
The upper computer receives and stores the electric energy error result, can perform data analysis according to the electric energy error result to obtain the condition of the external intelligent Internet of things for electric energy metering, and can generate a verification report according to the electric energy error result and an analysis conclusion in a set report form format to perform visual display and support export.
In one embodiment, as shown in fig. 5, the method for calibrating the power error of the intelligent internet of things further includes the following steps S201 to S204:
s201, receiving a daily timing pulse digital signal sent by the external intelligent Internet of things meter.
And S202, receiving a standard daily timing pulse signal sent by a precision time base source.
And S203, converting the standard daily timing pulse signal into a standard daily timing digital signal.
And S204, calculating a daily timing error result through the standard daily timing digital signal and the daily timing pulse digital signal.
The pulse error pure digital calculation unit sends the daily timing error result to the upper computer for storage, the upper computer performs data analysis according to the daily timing error result to obtain the daily timing metering condition of the external intelligent Internet of things meter, and the daily timing error result and an analysis conclusion can be further generated into a verification report according to a set report format for visual display and export support.
In one embodiment, before the step of receiving the digital signal of electric energy sent by the external smart internet of things, the method further comprises the following steps:
acquiring a device unique identifier of an external intelligent Internet of things table which has a unique connection relation with the pulse error pure digital computing unit from the upper computer;
starting Bluetooth broadcast to perform directional scanning, and searching a corresponding external intelligent Internet of things table according to the unique equipment identifier in a scanning result;
and completing Bluetooth pairing with the searched external intelligent Internet of things table, and communicating through Bluetooth.
As shown in fig. 6, the method for establishing the unique connection relationship between the pulse error pure digital computing unit and the external intelligent internet of things table includes the following steps S301 to S306:
s301, the upper computer acquires and stores the unique device identifiers of all the pulse error pure digital computing units in the system;
s302, recording the unique equipment identification of the external intelligent Internet of things table into the upper computer for storage;
s303, selecting the pulse error pure digital computing units with the number equal to that of the external intelligent Internet of things meters in the upper computer;
s304, establishing a unique connection relation table between the selected equipment unique identifier of the pulse error pure digital computing unit and the equipment unique identifier of the external intelligent Internet of things table;
s305, the selected pulse error pure digital computing unit receives a third working instruction sent by the upper computer and the unique equipment identifier of the external intelligent Internet of things table corresponding to the pulse error pure digital computing unit in the unique connection relation table;
s306, the selected pulse error pure digital computing unit starts Bluetooth to conduct directional scanning, the unique device identification of the external intelligent Internet of things is matched, and Bluetooth pairing connection is completed to enter a communication state.
The method for inputting the unique equipment identifier can be scanning two-dimensional codes or bar code information on hardware equipment by a scanning gun, or manually reading the unique equipment identifier in the indication board information on the hardware equipment; the device unique identification may be a MAC address of the hardware device.
In one embodiment, the step of communicating the pulse error pure digital computing unit and the external smart internet of things via bluetooth specifically includes:
the pulse error pure digital computing unit transmits signals and data in even time slots by using basic time slots specified by a Bluetooth communication protocol, and the external intelligent Internet of things table receives corresponding signals and data; and the external intelligent Internet of things table transmits signals and data in odd time slots, and the pulse error pure digital calculation unit receives corresponding signals and data.
The external intelligent Internet of things table can also transmit signals and data in even time slots, and the pulse error pure digital calculation unit receives corresponding signals and data; and the pulse error pure digital computing unit transmits signals and data in odd time slots, and the external intelligent Internet of things table receives corresponding signals and data.
In the embodiment, by using an automatic retransmission mechanism of a bluetooth technology, a frequency hopping technology and a basic time slot specified by a bluetooth communication protocol, each group of bluetooth paired devices communicates by using different basic time slots, so that the number of detected external intelligent internet of things can be increased, the risk of non-compliance caused by using the edge working bandwidth of a bluetooth frequency band in part of traditional technologies is also solved, and the problem of signal interfered data transmission caused by using the edge working bandwidth is also solved; because the mode of switching between the BLE mode and the 2.4G mode of the Bluetooth technology to send data is cancelled, the random large error generated when the mode switching is wrong is also solved.
In one embodiment, as shown in fig. 7, the converting the standard power pulse signal into a standard power digital signal, and calculating the power error result from the standard power digital signal and the power digital signal includes the following steps S401 to S408:
s401, receiving a standard electric energy pulse signal sent by the device standard meter, and recording the time scale of the standard electric energy pulse signal;
s402, receiving an electric energy digital signal sent by the external intelligent Internet of things meter, and recording the time scale of the electric energy digital signal;
s403, calculating a time ratio and a relative time scale time of the standard electric energy pulse signal according to the time scale of the standard electric energy pulse signal;
s404, calculating the time ratio and the relative time scale time of the electric energy digital signal according to the time scale of the electric energy digital signal;
s405, calculating standard electric energy digital signal data according to the time ratio and the relative time scale time of the standard electric energy pulse signal and the interval time of two adjacent standard electric energy pulse signals;
s406, calculating electric energy digital signal data according to the time ratio and the relative time scale time of the electric energy digital signal and the interval time of the two adjacent electric energy digital signals;
s407, circularly receiving the standard electric energy pulse signal sent by the device standard meter, recording the time scale of the standard electric energy pulse signal to the step of calculating electric energy digital signal data according to the time ratio and the relative time scale time of the electric energy digital signal and the interval time of two adjacent electric energy digital signals, accumulating the standard electric energy digital signal data and the electric energy digital signal data until the cycle execution time reaches the preset time,
and S408, calculating an electric energy error result by using the accumulated standard electric energy digital signal data and the electric energy digital signal data.
In the embodiment, the time scale of the standard electric energy pulse signal, the time scale of the electric energy digital signal and the time interval of the two signals are utilized to calculate the time ratio and the relative time scale time of the signals, so that the high-precision time setting of the digital pulse signal is ensured, and the influence of the stability of a system crystal oscillator on the electric energy error calculation is reduced.
In one embodiment, as shown in fig. 8, the converting the standard daily timing pulse signal into a standard daily timing digital signal, and calculating the daily timing error result from the standard daily timing digital signal and the daily timing digital signal includes the following steps S501 to S508:
s501, receiving a standard daily timing pulse signal sent by the precision time base source, and recording the time scale of the standard daily timing pulse signal;
s502, receiving a daily timing digital signal sent by the external intelligent Internet of things meter, and recording the time scale of the daily timing digital signal;
s503, calculating the time ratio and the relative time scale time of the standard daily timing pulse signal according to the time scale of the standard daily timing pulse signal;
s504, calculating the time ratio and the relative time scale time of the daily timing digital signal according to the time scale of the daily timing digital signal;
s505, calculating standard daily timing digital signal data according to the time ratio and the relative time scale time of the standard daily timing pulse signal and the interval time of the two adjacent standard daily timing pulse signals;
s506, calculating the data of the daily timing digital signals according to the time ratio and the relative time scale time of the daily timing digital signals and the interval time of the two adjacent daily timing digital signals;
s507, circularly receiving the standard daily timing pulse signal sent by the precision time base source, recording the time scale of the standard daily timing pulse signal to the step of calculating the daily timing digital signal data according to the time ratio and the relative time scale time of the daily timing digital signal and the interval time of the two adjacent daily timing digital signals, accumulating the standard daily timing digital signal data and the daily timing digital signal data until the cycle execution time reaches the preset time,
and S508, calculating a daily timing error result by using the accumulated standard daily timing digital signal data and the daily timing digital signal data.
In the embodiment, the time scale of the standard daily timing pulse signal, the time scale of the daily timing digital signal and the time interval of the two signals are utilized to calculate the time setting ratio and the relative time scale time of the signals, so that the high-precision time setting of the digital pulse signal is ensured, the influence of the stability of the system crystal oscillator on the daily timing error calculation is reduced, and meanwhile, the preset time is set through adjustment, so that the precision of the daily timing error calculation can be greatly improved.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; 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; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present invention, and are intended to be included within the scope of the present invention.
Claims (10)
1. An electric energy error calibration system of an intelligent Internet of things meter comprises an upper computer, a communication server, a device power source and a device standard meter, and is characterized by further comprising a pulse error pure digital calculation unit, wherein the upper computer is connected with the communication server, the communication server is respectively connected with the device power source, the device standard meter and the pulse error pure digital calculation unit, the device power source is connected with the device standard meter, the device standard meter and the communication server are respectively connected with the pulse error pure digital calculation unit, and the device standard meter is further connected with an external intelligent Internet of things meter to be detected;
the communication server provides network communication service for the upper computer, the device power source, the device standard table and the pulse error pure digital computing unit;
the upper computer sends a first working instruction to the device power source through the communication server, sends a second working instruction to the device standard meter, sends a third working instruction to the pulse error pure digital calculation unit, and sends a fourth working instruction to the external intelligent Internet of things meter, so that electric energy error calibration of the external intelligent Internet of things meter is completed, and an error calibration result is displayed;
when the device power source receives a first working instruction sent by the upper computer, a voltage signal and a current signal are provided for the device standard meter and the external intelligent Internet of things;
when the device standard meter receives the voltage signal, the current signal and a second working instruction sent by the upper computer, the external intelligent Internet of things meter receives the voltage signal, the current signal and a fourth working instruction sent by the upper computer and sends an electric energy digital signal to the pulse error pure digital computing unit, and the device standard meter is used for providing a standard electric energy pulse signal for the pulse error pure digital computing unit;
and when the pulse error pure digital calculation unit receives a third working instruction sent by the upper computer, the received standard electric energy pulse signal provided by the device standard meter is converted into a standard electric energy digital signal, and an electric energy error result is calculated through the standard electric energy digital signal and the electric energy digital signal.
2. The system for calibrating the electric energy error of the intelligent Internet of things meter according to claim 1, further comprising a precision time-base source, wherein the precision time-base source is respectively connected with the communication server and the pulse error pure digital computing unit;
the upper computer is also used for sending a fourth working instruction to the precision time-based source through the communication server;
the precision time base source is used for providing a standard daily timing pulse signal to the pulse error pure digital calculation unit when receiving the fourth working instruction sent by the upper computer;
the pulse error pure digital calculation unit is also used for receiving a daily timing pulse digital signal sent by the external intelligent Internet of things meter, converting the standard daily timing pulse signal into a standard daily timing digital signal, and calculating a daily timing error result through the standard daily timing digital signal and the daily timing pulse digital signal.
3. The system for calibrating the electric energy error of the intelligent Internet of things meter according to claim 2, further comprising an error display unit, wherein the error display unit is respectively connected with the communication server and the pulse error pure digital calculation unit;
the error display unit is used for displaying the electric energy error result and/or the daily timing error result which are obtained by the calculation of the pulse error pure digital calculation unit, and sending the error result to the upper computer for storage.
4. The system for calibrating electric energy error of the intelligent internet of things according to claim 3, wherein the number of the pulse error pure digital computing units is greater than or equal to the number of the external intelligent internet of things, and one external intelligent internet of things is uniquely connected with one pulse error pure digital computing unit.
5. The intelligent Internet of things meter electric energy error verification system of claim 2, wherein the upper computer is further configured to:
and analyzing the electric energy error result and/or the daily timing error result to obtain a corresponding analysis conclusion, and displaying the analysis conclusion.
6. An intelligent Internet of things meter electric energy error verification method is applied to a pulse error pure digital calculation unit in the intelligent Internet of things meter electric energy error verification system according to any one of claims 1 to 5, and the method comprises the following steps:
receiving a standard electric energy pulse signal provided by a standard meter of the device;
receiving an electric energy digital signal sent by an external intelligent Internet of things meter which is uniquely connected with the pulse error pure digital computing unit;
converting the standard electric energy pulse signal into a standard electric energy digital signal, and calculating an electric energy error result through the standard electric energy digital signal and the electric energy digital signal;
sending the electric energy error result to an upper computer for storage;
the standard electric energy pulse signal provided by the standard meter of the circulating receiving device is transmitted to the step of sending the electric energy error result to the upper computer for storage until the circulating times are equal to the preset times;
and after the circulation process is finished, the pulse error pure digital calculation unit is disconnected with the external intelligent Internet of things meter, the electric energy error result obtained by each circulation is sent to the upper computer, the upper computer analyzes according to each electric energy error result, and the analysis result is displayed.
7. The method for calibrating the electric energy error of the intelligent Internet of things meter according to claim 6, further comprising the following steps of:
receiving a daily timing pulse digital signal sent by the external intelligent Internet of things meter;
receiving a standard daily timing pulse signal sent by a precise time base source;
converting the standard daily timing pulse signal into a standard daily timing digital signal;
and calculating a daily timing error result through the standard daily timing digital signal and the daily timing pulse digital signal.
8. The method for calibrating the electric energy error of the intelligent Internet of things meter as claimed in claim 6, wherein before the step of receiving the electric energy digital signal sent by the external intelligent Internet of things meter, the method further comprises the following steps:
acquiring a device unique identifier of an external intelligent Internet of things table which has a unique connection relation with the pulse error pure digital computing unit from the upper computer;
starting Bluetooth broadcast to perform directional scanning, and searching a corresponding external intelligent Internet of things table according to the unique equipment identifier in a scanning result;
and completing Bluetooth pairing with the searched external intelligent Internet of things table, and communicating through Bluetooth.
9. The method for calibrating the electric energy error of the intelligent Internet of things meter according to claim 8, wherein the step of communicating the pulse error pure digital computing unit and the external intelligent Internet of things meter through Bluetooth specifically comprises the following steps:
the pulse error pure digital computing unit transmits signals and data in even time slots by using basic time slots specified by a Bluetooth communication protocol, and the external intelligent Internet of things table receives corresponding signals and data; and the external intelligent Internet of things table transmits signals and data in odd time slots, and the pulse error pure digital calculation unit receives corresponding signals and data.
10. The method for calibrating the electric energy error of the intelligent internet of things meter according to claim 6, wherein the step of converting the standard electric energy pulse signal into a standard electric energy digital signal and calculating the electric energy error result through the standard electric energy digital signal and the electric energy digital signal comprises the following steps:
receiving a standard electric energy pulse signal sent by the device standard meter, and recording the time scale of the standard electric energy pulse signal;
receiving an electric energy digital signal sent by the external intelligent Internet of things meter, and recording the time scale of the electric energy digital signal;
calculating the time ratio and the relative time scale time of the standard electric energy pulse signal according to the time scale of the standard electric energy pulse signal;
calculating the time ratio and the relative time scale time of the electric energy digital signal according to the time scale of the electric energy digital signal;
calculating standard electric energy digital signal data according to the time ratio and the relative time scale time of the standard electric energy pulse signal and the interval time of two adjacent standard electric energy pulse signals;
calculating electric energy digital signal data according to the time ratio and the relative time scale time of the electric energy digital signal and the interval time of the two adjacent electric energy digital signals;
the step of circularly receiving the standard electric energy pulse signal sent by the device standard meter, recording the time scale of the standard electric energy pulse signal to the step of calculating electric energy digital signal data according to the time ratio and the relative time scale time of the electric energy digital signal and the interval time of two adjacent electric energy digital signals, accumulating the standard electric energy digital signal data and the electric energy digital signal data until the cycle execution time reaches the preset time,
and calculating a power error result by using the accumulated standard power digital signal data and the power digital signal data.
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