CN115453445A - Automatic detection device, method and medium for overload protection ammeter - Google Patents
Automatic detection device, method and medium for overload protection ammeter Download PDFInfo
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Abstract
The device comprises a power supply module, a sampler and an error metering module, wherein the output end of the power supply module is connected with a plurality of meters to be detected, the sampler and a temperature sensor are connected between each meter to be detected and the error metering module, the error metering module is connected with an upper computer through a communication module, a Hall sensor is further connected between the error metering module and the output end of the power supply module, the error metering module is used for calculating the electric energy of an analog standard meter according to the collected current and voltage data and combining a temperature compensation coefficient, then carrying out error comparison on the electric energy of the analog standard meter and the electric energy of the meters to be detected, and the error metering module is connected with the power supply module through a control module. The invention can simultaneously judge whether the detected table is qualified or not and whether temperature compensation is needed or not, has high detection accuracy, avoids complex operation, improves the detection efficiency, reduces the working load of the processor and has high reliability.
Description
Technical Field
The invention relates to the technical field of electric energy meter detection, in particular to an automatic detection device, method and medium for an overload protection electric meter.
Background
With the continuous deepening of the intelligent process of the urban power grid, the role played by the intelligent electric meter is more and more important. Because the metering error of the electric energy meter is directly related to the economic benefits of both the power supply and the power utilization, both the power supply and the power utilization put forward extremely high requirements on the accuracy of electric energy metering. The intelligent electric energy meter is a main means for measuring the electric energy of the future power grid, and the measuring precision of the intelligent electric energy meter is widely concerned by the society.
The intelligent electric energy meters are subjected to unified calibration before leaving a factory, but the conventional calibration means only corrects the metering values of the meters under the normal temperature condition and adjusts the metering precision before leaving the factory of the electric energy meters, and does not consider the wide temperature range environment of the electric energy meters during actual working, so that the metering error caused by temperature change is not fundamentally eliminated or reduced.
The invention patent with the application number of 202110421641.4 discloses an electric energy meter detection system, which comprises a terminal, a calibration device and a multi-serial server, wherein the terminal and the calibration device are in communication connection through the multi-serial server; the calibrating device comprises a camera, wherein the camera is used for acquiring an appearance image to be detected of the electric energy meter to be detected and sending the appearance image to be detected to the terminal through the multi-serial-port server; the terminal comprises an appearance unit, and the appearance unit is used for comparing the appearance image to be detected with a locally stored preset appearance image to determine the appearance defect of the electric energy meter to be detected. Because the testing process of electric energy meter is realized through mechanical equipment, need not to detect through the manual work, realize the automated inspection to the electric energy meter, improve the detection efficiency to the electric energy meter, promote to be divided into the uniformity of the product performance between the electric energy meter of recycling after detecting. However, when the error of the electric energy meter is detected, the standard meter is required to be used as a judgment basis, the complexity of wiring operation is increased, the production cost of the detection system is increased, the influence of temperature on the detection result is not considered, the detection accuracy is low, and the state of the electric energy meter cannot be judged and optimized according to the detection error.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention provides the automatic detection device, the method and the medium for the overload protection ammeter, so that the problem of metering errors caused by temperature changes after the ammeter leaves a factory is solved, and the detection efficiency and the detection accuracy of the ammeter are improved.
The invention adopts the following technical scheme.
An overload protection ammeter automatic detection device, comprising: the device comprises a power supply module, a sampler, a temperature sensor, a Hall sensor, an error metering module, a communication module and an upper computer;
the output end of the power supply module is connected with the plurality of checked meters and used for providing a three-phase current voltage source;
one end of the sampler is connected with the detected meter, and the other end of the sampler is connected with the error metering module and used for collecting electric power data of the detected meter and transmitting the electric power data to the error metering module;
one end of the temperature sensor is connected with the detected meter, and the other end of the temperature sensor is connected with the error metering module and used for acquiring environment temperature data and transmitting the environment temperature data to the error metering module;
one end of the Hall sensor is connected with the power supply module, the other end of the Hall sensor is connected with the error metering module, and the Hall sensor is used for collecting current and voltage data at the output end of the power supply module and transmitting the collected current and voltage data to the error metering module;
one end of the communication module is connected with the error metering module, and the other end of the communication module is connected with the upper computer and used for communication transmission;
the error metering module sends the ID of the detected table and the environmental temperature data to the upper computer through the communication module, wherein the ID of the detected table is stored in a memory connected with the error metering module, and the error metering module is directly called when needed;
the upper computer comprises a memory, the memory stores electric energy meter temperature compensation functions of different models, the upper computer obtains the model of the detected meter according to the ID of the detected meter and obtains environmental temperature data at the same time, the upper computer calculates the temperature compensation coefficient corresponding to the model of the detected meter by using the environmental temperature data, and then transmits the temperature compensation coefficient to the error metering module through the communication module;
the error metering module calculates the electric energy of the analog standard meter according to the current and voltage data collected by the Hall sensor and by combining the temperature compensation coefficient, and then compares the electric energy of the analog standard meter with the electric energy of the meter to be detected to obtain an error result.
Preferably, the automatic detection device further comprises a control module,
one end of the control module is connected with the error metering module, the other end is connected with the power supply module,
the error metering module calculates electric power according to the current and the voltage transmitted by the Hall sensor, judges whether the electric power exceeds a set threshold value or not, and sends an overload signal to the control module when the electric power exceeds the set threshold value.
The power supply module comprises a power supply, an overload protection circuit and a power source which are connected in sequence;
the power supply is used for providing working power supply; the overload protection circuit comprises a switch unit and an overload signal input unit, and when the control module receives an overload signal, the overload signal is input through the overload signal input unit to control the switch unit to be switched off;
the power source is used for outputting a three-phase current voltage source.
An overload protection ammeter automatic detection method comprises the following steps:
step 1, calculating temperature compensation functions of various types of electric energy meters based on historical electric energy meter experiment data, and calculating temperature compensation coefficients by using the temperature compensation functions;
step 2, collecting electric power of a detected meter, and transmitting real-time environmental temperature, voltage and current data to an error metering module;
step 3, acquiring a corresponding temperature compensation coefficient according to the model of the detected table and the ambient temperature;
step 4, calculating the electric power Pb of the analog standard meter according to the voltage and current data acquired by the Hall sensor, and calculating the electric power Pc of the analog standard meter after compensation by referring to a temperature compensation function;
step 5, simultaneously detecting the electric energy Wc of the analog standard meter and the electric energy Wa of the detected meter in the time interval T, and carrying out error comparison to obtain an error value epsilon;
and 6, judging whether the table to be detected is in a qualified state or not and whether temperature compensation is needed or not by referring to the error value epsilon.
Preferably, in step 4, the electric power Pb of the analog standard meter is obtained by multiplying the voltage and current data acquired by the hall sensor, and the current ambient temperature t is substituted into the temperature compensation function to obtain a temperature compensation coefficient, i.e., an electric power difference d, so that the compensated electric power Pc = Pb + d of the analog standard meter; wherein d is a positive number when the ambient temperature t is greater than 23 ℃; when the ambient temperature t is less than 23 ℃, d is a negative number.
In step 5, the error value epsilon is calculated according to the following formula:
ε＝|Wc-Wa|，Wc＝Pc×T，Wa＝Pa×T
in the formula, pa represents the electric power of the table to be checked.
In step 6, referring to the error value epsilon, judging whether the table to be detected is in a qualified state or not and whether temperature compensation is needed or not, and the method comprises the following steps:
if epsilon is more than or equal to 0 and less than or equal to D1, the detected table is qualified, and temperature compensation is not needed;
if D1 < epsilon < D2, the detected table is qualified, but temperature compensation is needed;
if epsilon is larger than D2, the detected table is unqualified;
wherein D1 represents a temperature compensation set value in a detection standard;
d2 represents a temperature acceptable set value in the detection standard.
Preferably, in step 6, the temperature compensation comprises: when the ambient temperature t is more than 23 ℃, adding a temperature compensation coefficient before the electric power is output by the detected meter; when the ambient temperature t is less than 23 ℃, the temperature compensation coefficient is subtracted before the table under test outputs electric power.
A terminal comprising a processor and a storage medium; the method is characterized in that:
the storage medium is used for storing instructions;
the processor is used for operating according to the instruction to execute the steps of the automatic detection method of the overload protection electric meter.
Computer-readable storage medium, on which a computer program is stored, characterized in that the program, when being executed by a processor, carries out the steps of a method for automatic detection of an overload protection meter.
The invention has the advantages that compared with the prior art,
1) The sampler and the temperature sensor are arranged between the detected meter and the error metering module and are respectively used for collecting electric power data and environmental temperature data of the detected meter, the Hall sensor is used for collecting current and voltage data of the output end of the power supply module, the error metering module is used for calculating electric energy of the analog standard meter according to the collected current and voltage data and a temperature compensation coefficient obtained from a memory of an upper computer, error comparison is carried out on the electric energy of the analog standard meter and the electric energy of the detected meter, whether the detected meter is qualified or not and whether temperature compensation is needed or not can be judged at the same time, and the detection accuracy is high.
2) The temperature compensation functions of various electric energy meters are calculated by utilizing prestored historical electric energy meter experiment data, the temperature compensation coefficient of the electric energy meter can be obtained by inputting the ambient temperature, the calculation process is simple, the complex operation is avoided, the detection efficiency is improved, the working load of a processor is reduced, and the reliability is high.
Drawings
Fig. 1 is a schematic structural diagram of an automatic detection device of an overload protection electric meter according to the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. The embodiments described in this application are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art without inventive step, are within the scope of protection of the present invention.
Example 1.
An automatic detection device for an overload protection ammeter.
As shown in fig. 1. The utility model provides an overload protection ammeter automatic checkout device, includes power module, sample thief, temperature sensor, hall sensor, error metering module, control module, communication module and host computer.
The output end of the power supply module is connected with a plurality of meters to be detected and used for providing a three-phase current voltage source, a sampler and a temperature sensor are connected between each meter to be detected and the error metering module,
one end of the sampler is connected with the detected meter, and the other end of the sampler is connected with the error metering module and used for collecting electric power data of the detected meter and transmitting the electric power data to the error metering module;
one end of the temperature sensor is connected with the detected meter, and the other end of the temperature sensor is connected with the error metering module and used for acquiring environment temperature data and transmitting the environment temperature data to the error metering module;
one end of the communication module is connected with the error metering module, the other end of the communication module is connected with the upper computer, the communication module plays a role in communication transmission and can adopt a wireless (Bluetooth and WIFI) or wired transmission mode (RS 232 and RS 484),
one end of the Hall sensor is connected with the power supply module, the other end of the Hall sensor is connected with the error metering module, and the Hall sensor is used for collecting current and voltage data of the output end of the power supply module and transmitting the collected current and voltage data to the error metering module.
The error metering module sends the ID of the detected table and the environmental temperature data to the upper computer through the communication module, wherein the ID of the detected table is stored in a memory connected with the error metering module, and the error metering module is directly called when needed;
the upper computer comprises a memory, the memory stores electric energy meter temperature compensation functions of different models, the upper computer obtains the model of the detected meter according to the ID of the detected meter and obtains environmental temperature data at the same time, the upper computer calculates the temperature compensation coefficient corresponding to the model of the detected meter by using the environmental temperature data, and then transmits the temperature compensation coefficient to the error metering module through the communication module;
the error metering module calculates the electric energy of the analog standard meter according to the current and voltage data collected by the Hall sensor and by combining the temperature compensation coefficient, and then compares the electric energy of the analog standard meter with the electric energy of the meter to be detected to obtain an error result.
The error metering module is used for calculating the electric energy of the analog standard meter according to the current and voltage data collected by the Hall sensor and combining the temperature compensation coefficient, then comparing the electric energy of the analog standard meter and the electric energy of the meter to be detected with errors to obtain an error result,
one end of the control module is connected with the error metering module, and the other end of the control module is connected with the power supply module and used for adjusting the output power of the power supply module. The error metering module calculates electric power according to the current and the voltage transmitted by the Hall sensor, judges whether the electric power exceeds a set threshold value or not, and sends an overload signal to the control module when the electric power exceeds the set threshold value.
In this embodiment, preferably, the power supply module includes a power supply, an overload protection circuit and a power source, which are connected in sequence, the power supply is configured to provide a working power supply, the overload protection circuit includes a switch unit and an overload signal input unit, and when the control module receives an overload signal, the overload signal is input through the overload signal input unit to control the switch unit to be turned off; the power source is used for outputting a three-phase current voltage source. When the output power exceeds a set threshold value, the control module controls the switch unit to be switched off, and the circuit is prevented from being burnt out.
Example 2.
A detection method of an automatic detection device of an overload protection ammeter comprises the following steps:
step 1, calculating temperature compensation functions of various types of electric energy meters based on historical electric energy meter experiment data, and calculating temperature compensation coefficients by using the temperature compensation functions.
Wherein, historical electric energy meter experimental data include: ambient temperature, electric power difference
Specifically, calculating the temperature compensation function of the plurality of types of electric energy meters comprises:
step 1.1, selecting two standard electric energy meters and experimental electric energy meters with the same model, and respectively placing the standard electric energy meters and the experimental electric energy meters in a constant temperature box and a working environment for comparison experiments.
In this embodiment, the temperature of the incubator is set to 23 ℃, the temperature of the working environment is in the range of-50 ℃ to 80 ℃, and a value is taken every 0.5 ℃.
And 1.2, respectively recording the electric power of the standard electric energy meter and the electric power of the experimental electric energy meter at the same moment at the same environmental temperature, and calculating an electric power difference d.
For example: the ambient temperature is 38 ℃, the electric powers measured by the standard electric energy meter and the experimental electric energy meter at the same moment are 3.2KW and 3.201KW respectively, and the electric power difference d is 0.001KW at the ambient temperature.
And 1.3, changing the ambient temperature, repeatedly recording a plurality of groups of electric power to obtain a plurality of groups of electric power difference values d, and generating discrete points of the electric power difference values d and the ambient temperature t.
And step 1.4, fitting a curve to the discrete points by adopting Origin software to obtain a temperature compensation function d (t).
d(t)＝a 0 +a 1 t+a 2 t 2 +a n t n +ε
In the formula, a0-an is a coefficient, epsilon is an error, n is a natural number, and t is temperature.
Origin is a scientific mapping, data analysis software developed by OriginLab corporation, supporting operation under Microsoft Windows. Origin supports a wide variety of 2D/3D graphics. Data analysis functions in Origin include statistics, signal processing, curve fitting, and peak analysis. The curve fit in Origin is a non-linear least squares fit based on the Levernberg-Marquardt algorithm (LMA).
And step 1.5, substituting the environmental temperature t of the detected table into the temperature compensation function d (t) to obtain the temperature compensation coefficient.
Step 2, collecting electric power, real-time environment temperature, voltage and current data of the detected meter and transmitting the data to an error metering module,
and 2.1, obtaining the electric power Pa of the detected meter through a sampler, and transmitting the electric power Pa to an error metering module.
The electric power Pa of the detected meter is obtained by multiplying the current and voltage values detected by a current transformer and a voltage transformer inside the detected meter.
And 2.2, obtaining the ambient temperature of the detected meter through the temperature sensor, and transmitting the ambient temperature to the error metering module.
And 2.3, the Hall sensor obtains voltage and current data of the output end of the power supply module and transmits the voltage and current data to the error metering module.
And 3, acquiring a corresponding temperature compensation coefficient according to the model of the detected table and the ambient temperature.
The temperature compensation functions of the electric energy meters with a plurality of models are stored in a storage of the upper computer, the corresponding temperature compensation functions are found out according to the model ID of the detected meter, and then the temperature compensation functions are substituted into the current environment temperature, so that the temperature compensation coefficient can be calculated. The model ID of the detected table is stored in a memory connected with the error metering module and is directly called when needed.
And 4, calculating the electric power Pb of the analog standard meter according to the voltage and current data acquired by the Hall sensor, and calculating the compensated electric power Pc according to the temperature compensation function.
And multiplying voltage and current data acquired by the Hall sensor to obtain electric power Pb of the analog standard table, substituting the current ambient temperature t into a temperature compensation function to obtain a temperature compensation coefficient, namely an electric power difference d, and then obtaining compensated electric power Pc = Pb + d. When the ambient temperature t is more than 23 ℃, d is a positive number, otherwise, d is a negative number.
Step 5, simultaneously detecting the electric energy Wc of the analog standard meter and the electric energy Wa of the detected meter in the time interval T, and carrying out error comparison to obtain an error value epsilon, wherein epsilon = | Wc-Wa |, wc = Pc × T, wa = Pa × T; in the formula, pa represents the electric power of the table to be checked.
And 6, judging whether the table to be detected is in a qualified state or not and whether temperature compensation is needed or not by referring to the error value epsilon.
Specifically, with reference to the error value e, it is determined whether the table to be checked is in a qualified state and whether temperature compensation is required, including:
if epsilon is more than or equal to 0 and less than or equal to D1, the detected table is qualified, and temperature compensation is not needed.
If D1 < epsilon < D2, the table to be checked is qualified, but temperature compensation is required.
If epsilon is larger than D2, the detected table is unqualified,
wherein D1 and D2 are respectively a temperature compensation set value and a qualified set value in the detection standard.
The temperature compensation comprises the following steps: when the ambient temperature t is greater than 23 ℃, the temperature compensation coefficient is added before the electric power is output by the detected meter, and when the ambient temperature t is less than 23 ℃, the temperature compensation coefficient is subtracted before the electric power is output by the detected meter.
Example 3.
The third embodiment of the invention provides a computer-readable storage medium.
A computer-readable storage medium, on which a program is stored, which when executed by a processor, implements the steps in a detection method of an automatic detection apparatus of an overload protection electric meter according to embodiment 2 of the present invention.
The detailed steps are the same as those of the detection method of the automatic detection device for the overload protection ammeter provided in the embodiment 2, and are not described again here.
Example 4.
Embodiment 4 of the present invention provides an electronic device.
An electronic device includes a memory, a processor and a program stored in the memory and executable on the processor, wherein the processor executes the program to implement the steps of the detection method of the automatic detection device for the overload protection electric meter according to embodiment 2 of the present invention.
The invention has the advantages that compared with the prior art, the sampler and the temperature sensor are arranged between the detected meter and the error metering module and are respectively used for acquiring the electric power data and the environmental temperature data of the detected meter, the Hall sensor is used for acquiring the current and voltage data of the output end of the power supply module, the error metering module acquires the temperature compensation coefficient from the memory of the upper computer according to the acquired current and voltage data, the electric energy of the analog standard meter is calculated, the analog standard meter is compared with the electric energy of the detected meter in an error mode, whether the detected meter is qualified or not and whether the temperature compensation is needed or not can be judged at the same time, and the detection accuracy is high. The temperature compensation functions of various electric energy meters are calculated by utilizing prestored historical electric energy meter experimental data, the temperature compensation coefficient of the electric energy meter can be obtained by inputting the ambient temperature, the calculation process is simple, the complex operation is avoided, the detection efficiency is improved, the working load of the processor is reduced, and the reliability is high.
The present disclosure may be systems, methods, and/or computer program products. The computer program product may include a computer-readable storage medium having computer-readable program instructions embodied thereon for causing a processor to implement various aspects of the present disclosure.
The computer-readable storage medium may be a tangible device that can hold and store the instructions for use by the instruction execution device. The computer readable storage medium may be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, semiconductor memory device, or any suitable combination of the foregoing. More specific examples (a non-exhaustive list) of the computer readable storage medium would include the following: a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), a Static Random Access Memory (SRAM), a portable compact disc read-only memory (CD-ROM), a Digital Versatile Disc (DVD), a memory stick, a floppy disk, a mechanical coding device, such as punch cards or in-groove projection structures having instructions stored thereon, and any suitable combination of the foregoing. Computer-readable storage media as used herein is not to be construed as transitory signals per se, such as radio waves or other freely propagating electromagnetic waves, electromagnetic waves propagating through a waveguide or other transmission medium (e.g., optical pulses through a fiber optic cable), or electrical signals transmitted through electrical wires.
The computer-readable program instructions described herein may be downloaded from a computer-readable storage medium to a respective computing/processing device, or to an external computer or external storage device via a network, such as the internet, a local area network, a wide area network, and/or a wireless network. The network may include copper transmission cables, fiber optic transmission, wireless transmission, routers, firewalls, switches, gateway computers and/or edge servers. The network adapter card or network interface in each computing/processing device receives computer-readable program instructions from the network and forwards the computer-readable program instructions for storage in a computer-readable storage medium in the respective computing/processing device.
The computer program instructions for carrying out operations of the present disclosure may be assembler instructions, instruction Set Architecture (ISA) instructions, machine-related instructions, microcode, firmware instructions, state setting data, or source or object code written in any combination of one or more programming languages, including an object oriented programming language such as Smalltalk, C + + or the like and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The computer-readable program instructions may execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely on the remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer through any type of network, including a Local Area Network (LAN) or a Wide Area Network (WAN), or the connection may be made to an external computer (for example, through the Internet using an Internet service provider). In some embodiments, the electronic circuitry that can execute the computer-readable program instructions implements aspects of the present disclosure by utilizing the state information of the computer-readable program instructions to personalize the electronic circuitry, such as a programmable logic circuit, a Field Programmable Gate Array (FPGA), or a Programmable Logic Array (PLA).
Various aspects of the present disclosure are described herein with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the disclosure. It will be understood that each block of the flowchart illustrations and/or block diagrams, and combinations of blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer-readable program instructions.
These computer-readable program instructions may be provided to a processor of a general purpose computer, special purpose computer, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions/acts specified in the flowchart and/or block diagram block or blocks. These computer-readable program instructions may also be stored in a computer-readable storage medium that can direct a computer, programmable data processing apparatus, and/or other devices to function in a particular manner, such that the computer-readable medium storing the instructions comprises an article of manufacture including instructions which implement the function/act specified in the flowchart and/or block diagram block or blocks.
The computer readable program instructions may also be loaded onto a computer, other programmable data processing apparatus, or other devices to cause a series of operational steps to be performed on the computer, other programmable apparatus or other devices to produce a computer implemented process such that the instructions which execute on the computer, other programmable apparatus or other devices implement the functions/acts specified in the flowchart and/or block diagram block or blocks.
The flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to various embodiments of the present disclosure. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of instructions, which comprises one or more executable instructions for implementing the specified logical function(s). In some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems that perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the same, and although the present invention is described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: modifications and equivalents may be made to the embodiments of the invention without departing from the spirit and scope of the invention, which is to be covered by the claims.
Claims (10)
1. An overload protection ammeter automatic detection device, characterized in that said device comprises: the device comprises a power supply module, a sampler, a temperature sensor, a Hall sensor, an error metering module, a communication module and an upper computer;
the output end of the power supply module is connected with the plurality of detected meters and is used for providing a three-phase current voltage source;
one end of the sampler is connected with the detected meter, and the other end of the sampler is connected with the error metering module and used for collecting electric power data of the detected meter and transmitting the electric power data to the error metering module;
one end of the temperature sensor is connected with the detected meter, and the other end of the temperature sensor is connected with the error metering module and used for acquiring environment temperature data and transmitting the environment temperature data to the error metering module;
one end of the Hall sensor is connected with the power supply module, the other end of the Hall sensor is connected with the error metering module, and the Hall sensor is used for collecting current and voltage data at the output end of the power supply module and transmitting the collected current and voltage data to the error metering module;
one end of the communication module is connected with the error metering module, and the other end of the communication module is connected with the upper computer and used for communication transmission;
the error metering module sends the ID of the table to be detected and the environmental temperature data to the upper computer through the communication module, wherein the ID of the table to be detected is stored in a memory connected with the error metering module, and the error metering module is directly called when needed;
the upper computer comprises a memory, the memory stores electric energy meter temperature compensation functions of different models, the upper computer obtains the model of the meter to be detected according to the ID of the meter to be detected and obtains environmental temperature data at the same time, the upper computer calculates the temperature compensation coefficient corresponding to the model of the meter to be detected by utilizing the environmental temperature data, and then the temperature compensation coefficient is transmitted to the error metering module through the communication module;
the error metering module calculates the electric energy of the analog standard meter according to the current and voltage data collected by the Hall sensor and by combining the temperature compensation coefficient, and then compares the electric energy of the analog standard meter with the electric energy of the meter to be detected to obtain an error result.
2. The automatic detection device for overload protection electric meters in accordance with claim 1, wherein the automatic detection device further comprises a control module,
one end of the control module is connected with the error metering module, the other end is connected with the power supply module,
the error metering module calculates electric power according to the current and the voltage transmitted by the Hall sensor, judges whether the electric power exceeds a set threshold value or not, and sends an overload signal to the control module when the electric power exceeds the set threshold value.
3. The automatic detection device for overload protection electric meter according to claim 2,
the power supply module comprises a power supply, an overload protection circuit and a power source which are connected in sequence;
the power supply is used for providing working power supply; the overload protection circuit comprises a switch unit and an overload signal input unit, and when the control module receives an overload signal, the overload signal is input through the overload signal input unit to control the switch unit to be switched off;
the power source is used for outputting a three-phase current voltage source.
4. An overload protection meter automatic detection method based on the device of any one of claims 1 to 3, characterized in that the method comprises:
step 1, calculating temperature compensation functions of various types of electric energy meters based on historical electric energy meter experiment data, and calculating temperature compensation coefficients by using the temperature compensation functions;
step 2, collecting electric power of a detected meter, and transmitting real-time environmental temperature, voltage and current data to an error metering module;
step 3, acquiring a corresponding temperature compensation coefficient according to the model of the detected table and the ambient temperature;
step 4, calculating the electric power Pb of the analog standard meter according to the voltage and current data acquired by the Hall sensor, and calculating the electric power Pc of the analog standard meter after compensation by referring to a temperature compensation function;
step 5, simultaneously detecting the electric energy Wc of the analog standard meter and the electric energy Wa of the detected meter in the time interval T, and carrying out error comparison to obtain an error value epsilon;
and 6, judging whether the table to be detected is in a qualified state or not and whether temperature compensation is needed or not by referring to the error value epsilon.
5. The method of claim 4, wherein the step of automatically detecting the overload protection meter comprises,
in step 4, multiplying voltage and current data acquired by the hall sensor to obtain electric power Pb of the analog standard meter, substituting the current environment temperature t into a temperature compensation function to obtain a temperature compensation coefficient, namely an electric power difference d, and then compensating the electric power Pc = Pb + d of the analog standard meter; wherein d is a positive number when the ambient temperature t is greater than 23 ℃; when the ambient temperature t is less than 23 ℃, d is a negative number.
6. The automatic detection method for overload protection electric meter according to claim 4,
in step 5, the error value epsilon is calculated according to the following formula:
ε＝|Wc-Wa|，Wc＝Pc×T，Wa＝Pa×T
in the formula, pa represents the electric power of the table to be examined.
7. The automatic detection method for overload protection electric meter according to claim 4,
in step 6, referring to the error value epsilon, judging whether the detected table is in a qualified state or not and whether temperature compensation is needed or not, comprising the following steps:
if epsilon is more than or equal to 0 and less than or equal to D1, the detected table is qualified, and temperature compensation is not needed;
if D1 < epsilon < D2, the detected table is qualified, but temperature compensation is needed;
if epsilon is more than D2, the detected table is unqualified;
wherein D1 represents a temperature compensation set value in a detection standard;
d2 represents a temperature acceptable set value in the detection standard.
8. The automatic detection method for overload protection electric meter according to claim 4,
in step 6, the temperature compensation comprises: when the ambient temperature t is more than 23 ℃, adding a temperature compensation coefficient before the electric power is output by the detected meter; when the ambient temperature t is less than 23 ℃, the temperature compensation coefficient is subtracted before the table under test outputs electric power.
9. A terminal comprising a processor and a storage medium; the method is characterized in that:
the storage medium is used for storing instructions;
the processor is operative according to the instructions to perform the steps of a method for automatic detection of an overload protection meter according to any one of claims 4 to 8.
10. Computer-readable storage medium, on which a computer program is stored, characterized in that the program, when being executed by a processor, carries out the steps of a method for automatic detection of an overload protection meter according to any one of claims 4 to 8.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116299145A (en) * | 2023-05-11 | 2023-06-23 | 石家庄科林电气股份有限公司 | Safety monitoring method and device for electric energy meter and electric energy meter |
| CN117360316A (en) * | 2023-09-08 | 2024-01-09 | 安徽能通新能源科技有限公司 | Charging pile online identification and vehicle pile monitoring device and control method thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116299145A (en) * | 2023-05-11 | 2023-06-23 | 石家庄科林电气股份有限公司 | Safety monitoring method and device for electric energy meter and electric energy meter |
| CN116299145B (en) * | 2023-05-11 | 2023-08-08 | 石家庄科林电气股份有限公司 | Safety monitoring method and device for electric energy meter and electric energy meter |
| CN117360316A (en) * | 2023-09-08 | 2024-01-09 | 安徽能通新能源科技有限公司 | Charging pile online identification and vehicle pile monitoring device and control method thereof |
| CN117360316B (en) * | 2023-09-08 | 2024-04-16 | 安徽能通新能源科技有限公司 | Charging pile online identification and vehicle pile monitoring device and control method thereof |
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