CN111337719A - Electric energy meter - Google Patents
Electric energy meter Download PDFInfo
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- CN111337719A CN111337719A CN202010150923.0A CN202010150923A CN111337719A CN 111337719 A CN111337719 A CN 111337719A CN 202010150923 A CN202010150923 A CN 202010150923A CN 111337719 A CN111337719 A CN 111337719A
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- 238000012545 processing Methods 0.000 claims abstract description 43
- 238000005070 sampling Methods 0.000 claims abstract description 43
- 238000004458 analytical method Methods 0.000 claims abstract description 4
- 230000002093 peripheral effect Effects 0.000 claims abstract description 4
- 238000004321 preservation Methods 0.000 claims description 13
- 238000000034 method Methods 0.000 claims description 9
- 238000010438 heat treatment Methods 0.000 claims description 6
- 230000008569 process Effects 0.000 claims description 6
- 229920005830 Polyurethane Foam Polymers 0.000 claims description 5
- 239000011496 polyurethane foam Substances 0.000 claims description 5
- 238000006243 chemical reaction Methods 0.000 claims description 4
- 238000012795 verification Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 8
- 229920003023 plastic Polymers 0.000 description 4
- 239000004033 plastic Substances 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 238000004891 communication Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000006698 induction Effects 0.000 description 3
- 230000004308 accommodation Effects 0.000 description 2
- 230000003321 amplification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
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- 238000004519 manufacturing process Methods 0.000 description 2
- 238000003199 nucleic acid amplification method Methods 0.000 description 2
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R11/00—Electromechanical arrangements for measuring time integral of electric power or current, e.g. of consumption
- G01R11/02—Constructional details
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R11/00—Electromechanical arrangements for measuring time integral of electric power or current, e.g. of consumption
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R11/00—Electromechanical arrangements for measuring time integral of electric power or current, e.g. of consumption
- G01R11/02—Constructional details
- G01R11/04—Housings; Supporting racks; Arrangements of terminals
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R11/00—Electromechanical arrangements for measuring time integral of electric power or current, e.g. of consumption
- G01R11/02—Constructional details
- G01R11/17—Compensating for errors; Adjusting or regulating means therefor
- G01R11/18—Compensating for variations in ambient conditions
- G01R11/185—Temperature compensation
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Abstract
The invention relates to an electric energy meter, comprising: sampling board, main control board and thermostatic bath, the sampling board is used for sampling input voltage, input current and to after the sampling input voltage the input current is converted into digital signal by analog signal and will digital signal provides the main control board, the main control board is used for the basis digital signal carries out the analysis, the sampling board includes analog signal processing module, analog signal processing module is used for handling the input the analog signal of sampling board, the thermostatic bath is located the sampling board analog signal processing module is peripheral, is used for making analog signal processing module's operational environment temperature heaies up to preset temperature. Through the mode, the invention can achieve the purposes of adapting to verification reference conditions of different temperatures, humidity and the like and stably working under different temperature and humidity environments.
Description
Technical Field
The invention relates to the field of metering instruments, in particular to an electric energy meter.
Background
The intelligent electric energy meter is used as an electric energy meter which integrates a measuring unit, a data processing unit, a communication unit and the like, has the functions of electric energy metering, information storage and processing, real-time monitoring, automatic control, information interaction and the like, is used as the tail end of a power grid, and has the accuracy and reliability closely related to the benefits of thousands of households.
At present, technical requirements for electric energy meters and technical requirements for large-scale automatic calibrating devices still use the technical requirements of mechanical electric energy meters and traditional calibrating devices, calibrating reference conditions also still use traditional laboratory calibrating conditions, and at present, expensive precise air conditioners and the like are needed to realize control of calibrating reference conditions such as temperature, humidity and the like, but the effect is not ideal.
Therefore, there is a need to provide a new electric energy meter to solve the above technical problems.
Disclosure of Invention
The application provides an electric energy meter can reach the purpose that homoenergetic stable work under different temperature, humidity environment and under the examination reference conditions such as adaptation different temperature, humidity.
In order to solve the technical problem, the application adopts a technical scheme that: provided is an electric energy meter including: sampling board, main control board and thermostatic bath, the sampling board is used for sampling input voltage, input current and to after the sampling input voltage the input current is converted into digital signal by analog signal and will digital signal provides the main control board, the main control board is used for the basis digital signal carries out the analysis, the sampling board includes analog signal processing module, analog signal processing module is used for handling the input the analog signal of sampling board, the thermostatic bath is located the sampling board analog signal processing module is peripheral, is used for making analog signal processing module's operational environment temperature heaies up to preset temperature.
Preferably, be equipped with from the heating module in the constant temperature bath, from the heating module including temperature-sensing module, intensification module, the temperature-sensing module is used for acquireing ambient temperature in the constant temperature bath, the intensification module is used for when ambient temperature in the constant temperature bath is less than preset temperature right the constant temperature bath heats the intensification.
Preferably, the temperature sensing module comprises a thermistor, and the ambient temperature in the thermostatic bath is obtained through sensing of the thermistor.
Preferably, the temperature raising module comprises a control operational amplifier and a triode, and the operational amplifier and the triode are controlled to work according to the environmental temperature in the thermostatic bath to heat and raise the temperature of the thermostatic bath.
Preferably, the thermostatic bath upper cover is provided with a heat preservation box for preserving the ambient temperature of the analog signal processing module.
Preferably, the heat preservation box comprises a heat preservation plate, the heat preservation plate surrounds a box-shaped structure with an opening on one surface and an accommodating space, the opening is covered on the thermostatic bath, and the analog signal processing module surrounded by the thermostatic bath is accommodated in the accommodating space.
Preferably, the heat insulation board is a polyurethane foam plastic board.
Preferably, the analog signal processing module includes an amplifying unit, a reference voltage unit and an analog circuit unit, the amplifying unit is configured to amplify the input voltage and the input current, the reference voltage unit is configured to obtain a reference voltage, and the analog circuit unit is configured to process an analog signal of the input voltage and the input current.
Preferably, the sampling board further comprises a digital circuit unit, the digital circuit unit is used for converting the analog signal into a digital signal, and the digital circuit unit and the analog circuit unit form an ADC conversion unit.
Preferably, the preset temperature is 50 ℃.
The beneficial effect of this application is: according to the electric energy meter, the constant temperature groove is arranged on the periphery of the analog signal processing module of the sampling plate, so that the analog signal processing module works at a preset ambient temperature, the influence of the ambient temperature, the humidity and the like outside the electric energy meter on key components of the electric energy meter is reduced, the working stability of the electric energy meter is improved, and the adaptability of the electric energy meter to wide reference conditions is improved.
Furthermore, be equipped with from the heat module in the constant temperature bath, can be based on from the heat module obtains the ambient temperature in the constant temperature bath, and control the constant temperature bath heats the intensification, does not need artificial intervention, and the temperature control degree of accuracy is high, has further increased the stability of electric energy meter work, reaches the adaptability of the wide reference condition of electric energy meter.
Furthermore, the ambient temperature in the thermostatic bath is obtained through thermistor induction, the working states of the operational amplifier and the triode are controlled to heat the thermostatic bath, the processing and the production are easy, and the thermistor, the operational amplifier and the triode have high stability and low cost.
Furthermore, the thermostatic bath upper cover is equipped with the heat preservation box, be used for right the ambient temperature heat preservation of analog signal processing module is that ambient temperature is more even, under the difference in temperature, and the energy saving.
Furthermore, the heat-insulating plate is a polyurethane foam plastic plate, has a good heat-insulating effect and low cost, and is easy to process and produce.
Furthermore, the thermostatic bath is arranged on the periphery of the analog circuit, so that the influence of the analog circuit on the environment temperature is reduced, and meanwhile, the influence of the thermostatic box on the space of the electric energy meter is reduced.
Furthermore, the preset temperature is 50 ℃ higher than the normal environment temperature, and the influence of the change of the environment temperature on components on the electric energy meter is reduced.
Drawings
FIG. 1 is a functional block diagram of an electric energy meter according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a sampling plate function module of an electric energy meter according to an embodiment of the invention;
FIG. 3 is a schematic diagram of an analog signal processing module of the electric energy meter according to an embodiment of the present invention;
fig. 4 is a schematic diagram of a thermostat function module of an electric energy meter according to an embodiment of the invention.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. 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 application.
The terms "first", "second" and "third" in this application are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any indication of the number of technical features indicated. Thus, a feature defined as "first," "second," or "third" may explicitly or implicitly include at least one of the feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless explicitly specifically limited otherwise. All directional indications (such as up, down, left, right, front, and rear … …) in the embodiments of the present application are only used to explain the relative positional relationship between the components, the movement, and the like in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indication is changed accordingly. Furthermore, the terms "include" and "have," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.
Referring to fig. 1, fig. 1 is a schematic diagram of functional modules of an electric energy meter according to an embodiment of the present invention.
The invention provides an electric energy meter, which comprises a sampling board and a main control board, wherein the sampling board is used for sampling input voltage and input current, converting the sampled input voltage and input current into digital signals from analog signals and providing the digital signals to the main control board, and the main control board is used for analyzing according to the digital signals, the method mainly comprises the steps of reading analog signal data and digital signal data, calculating a sampling value, controlling the sampling plate to perform gear shifting operation, performing harmonic analysis, outputting standard electric energy pulses, calculating electric energy wiring, performing electric energy error tests on the electric energy meter and the like.
In another embodiment, in order to make the electric energy meter have better man-machine interaction and operability, the electric energy meter may further include a communication board, an input device, and a display device, the communication board may connect the electric energy meter with a network, remotely read the meter or remotely operate the electric energy meter, the input device may accept an operation instruction of a user for completing a designated setting of the electric energy meter, such as power on, power off, error detection, and the like, the display device may be a display screen for displaying power consumption, electric energy meter state, and the like, so that the electric energy meter is more convenient to use, and user experience is better, wherein the input device and the display device may also be devices having input and display functions at the same time, such as a touch screen display.
Specifically, the sampling board includes analog signal processing module and thermostatic bath, analog signal processing module is used for handling the input the analog signal of sampling board, the thermostatic bath is located the sampling board analog signal processing module is peripheral, is used for making analog signal processing module's operational environment temperature heaies up to preset temperature. Because the electric energy meter is influenced by the environment and causes the component that the error is great mainly for the component that handles analog signal, can increase on the analog signal processing module on the sampling board the constant temperature groove makes the analog signal processing module of sampling board work under the constant temperature thereby the influence of environment to the electric energy meter is got rid of.
Referring to fig. 2 and fig. 3 together, fig. 2 is a schematic diagram of a sampling board function module of an electric energy meter according to an embodiment of the present invention, and fig. 3 is a schematic diagram of an analog signal processing module function module of the electric energy meter according to an embodiment of the present invention.
The sampling board includes voltage sampling unit, current sampling unit, amplifying unit and ADC unit, and in this embodiment, voltage sampling unit will the input voltage passes through resistance partial pressure, converts big voltage geometric proportion into little voltage, and little voltage passes through gain control and converts full scale + -2.5V voltage into again and passes through amplifying unit input the ADC unit. The main control board is used for switching gain control so as to achieve the purpose of gear switching. The current sampling unit converts the input current through a mutual inductor, converts large current into small voltage in an equal ratio mode, converts the small voltage into full-scale +/-2.5V voltage through gain control, and inputs the full-scale +/-2.5V voltage into the ADC unit through the amplifying unit. The main control board is used for switching gain control so as to achieve the purpose of gear switching.
The ADC unit further comprises a reference voltage unit, the amplifying unit is used for amplifying the input voltage and the input current, the reference voltage unit is used for acquiring reference voltage, and after the ADC unit finishes comparison processing of the amplified signal and the reference voltage, conversion from an analog signal to a digital signal is finished in the ADC unit. The ADC unit comprises an analog circuit part and a digital circuit part, wherein the analog circuit part is used for processing analog signals of the input voltage and the input current, the digital circuit part is used for completing conversion and processing from the analog signals to the digital signals, and the analog signal processing module comprises the amplifying unit, the reference voltage unit and the analog circuit part in the ADC unit.
Since the reference voltage unit, the amplification unit, and the analog circuit part in the ADC unit are susceptible to environmental influences to affect the accuracy, the thermostatic bath covers the reference voltage unit of the sampling plate, the amplification unit, and the analog circuit part in the ADC unit. And the oven space should be minimized for more accurate temperature control, so the digital circuit part in the ADC unit will not be covered by the oven.
Referring to fig. 4, fig. 4 is a schematic diagram of a thermostatic bath function module of an electric energy meter according to an embodiment of the invention.
Further, be equipped with from the heating module in the constant temperature bath, from the heating module including temperature-sensing module, intensification module, temperature-sensing module is used for acquireing constant temperature inslot ambient temperature, it is right when being less than preset temperature to heat up in the constant temperature bath to heat up the temperature-sensing module, the temperature-sensing module includes thermistor, through thermistor induction acquires constant temperature inslot ambient temperature, the intensification module is including control operational amplifier, triode, the basis constant temperature inslot ambient temperature control operational amplifier with the operating condition of triode is right the constant temperature bath heats up the temperature.
In another embodiment, the thermostatic bath may further be covered with a heat preservation box for preserving the ambient temperature of the analog signal processing module, the heat preservation box includes a plurality of heat preservation plates, the heat preservation plates surround a box-shaped structure having an opening on one side and an accommodation space, the opening is covered on the thermostatic bath, and the analog signal processing module surrounded by the thermostatic bath is accommodated in the accommodation space. Wherein, the insulation board can be a polyurethane foam plastic board.
It should be noted that, in this embodiment, the preset temperature is 50 degrees celsius. The temperature in the thermostatic bath is 50 ℃, is generally higher than the ambient temperature, can avoid the influence of temperature to analog signal processing circuit, all right in most use scenes the electric energy meter precision has no influence, only when operating temperature is higher than the temperature change in the thermostatic bath just probably produces the influence to the electric energy meter precision, but the temperature in the thermostatic bath is up to 50 ℃, and the ambient temperature can not be higher than this temperature under most circumstances. In addition, the preset temperature can be set manually, and can be set according to local temperature conditions in a part of regions with extremely hot environment.
The beneficial effect of this application is: according to the electric energy meter, the constant temperature groove is arranged on the periphery of the analog signal processing module of the sampling plate, so that the analog signal processing module works at a preset ambient temperature, the influence of the ambient temperature, the humidity and the like outside the electric energy meter on key components of the electric energy meter is reduced, the working stability of the electric energy meter is improved, and the adaptability of the electric energy meter to wide reference conditions is improved.
Furthermore, be equipped with from the heat module in the constant temperature bath, can be based on from the heat module obtains the ambient temperature in the constant temperature bath, and control the constant temperature bath heats the intensification, does not need artificial intervention, and the temperature control degree of accuracy is high, has further increased the stability of electric energy meter work, reaches the adaptability of the wide reference condition of electric energy meter.
Furthermore, the ambient temperature in the thermostatic bath is obtained through thermistor induction, the working states of the operational amplifier and the triode are controlled to heat the thermostatic bath, the processing and the production are easy, and the thermistor, the operational amplifier and the triode have high stability and low cost.
Furthermore, the thermostatic bath upper cover is equipped with the heat preservation box, be used for right the ambient temperature heat preservation of analog signal processing module is that ambient temperature is more even, under the difference in temperature, and the energy saving.
Furthermore, the heat-insulating plate is a polyurethane foam plastic plate, has a good heat-insulating effect and low cost, and is easy to process and produce.
Furthermore, the thermostatic bath is arranged on the periphery of the analog circuit, so that the influence of the analog circuit on the environment temperature is reduced, and meanwhile, the influence of the thermostatic box on the space of the electric energy meter is reduced.
Furthermore, the preset temperature is 50 ℃ higher than the normal environment temperature, and the influence of the change of the environment temperature on components on the electric energy meter is reduced.
While the foregoing is directed to embodiments of the present invention, it will be understood by those skilled in the art that various changes may be made without departing from the spirit and scope of the invention.
Claims (10)
1. An electric energy meter, characterized in that the electric energy meter comprises: sampling board, main control board and thermostatic bath, the sampling board is used for sampling input voltage, input current and to after the sampling input voltage the input current is converted into digital signal by analog signal and will digital signal provides the main control board, the main control board is used for the basis digital signal carries out the analysis, the sampling board includes analog signal processing module, analog signal processing module is used for handling the input the analog signal of sampling board, the thermostatic bath is located the sampling board analog signal processing module is peripheral, is used for making analog signal processing module's operational environment temperature heaies up to preset temperature.
2. The electric energy meter according to claim 1, wherein a self-heating module is disposed in the thermostatic bath, the self-heating module includes a temperature sensing module and a temperature raising module, the temperature sensing module is configured to obtain an ambient temperature in the thermostatic bath, and the temperature raising module is configured to heat the thermostatic bath to raise a temperature when the ambient temperature in the thermostatic bath is lower than a preset temperature.
3. The electric energy meter according to claim 2, wherein the temperature sensing module comprises a thermistor, and the thermistor senses and obtains the ambient temperature in the thermostatic bath.
4. The electric energy meter according to claim 2, wherein the temperature raising module comprises a control operational amplifier and a transistor, and the operational state of the operational amplifier and the operation state of the transistor are controlled according to the ambient temperature in the thermostatic bath to heat and raise the temperature of the thermostatic bath.
5. The electric energy meter according to claim 1, wherein the thermostatic bath upper cover is provided with a heat preservation box for preserving the ambient temperature of the analog signal processing module.
6. The electric energy meter according to claim 5, wherein the heat-insulating box comprises a heat-insulating plate, the heat-insulating plate surrounds a box-shaped structure with an opening on one surface and a containing space, the opening is covered on the thermostatic bath, and the analog signal processing module surrounded by the thermostatic bath is contained in the containing space.
7. The electric energy meter according to claim 6, wherein the heat-insulating board is a polyurethane foam board.
8. The electric energy meter according to claim 1, wherein the analog signal processing module comprises an amplifying unit, a reference voltage unit and an analog circuit unit, the amplifying unit is configured to amplify the input voltage and the input current, the reference voltage unit is configured to obtain a reference voltage, and the analog circuit unit is configured to process an analog signal of the input voltage and the input current.
9. The electric energy meter according to claim 1, wherein the sampling board further comprises a digital circuit unit for converting the analog signal into a digital signal, and the digital circuit unit and the analog circuit unit constitute an ADC conversion unit.
10. The electrical energy meter according to claim 1, wherein the preset temperature is 50 degrees celsius.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010150923.0A CN111337719A (en) | 2020-03-06 | 2020-03-06 | Electric energy meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010150923.0A CN111337719A (en) | 2020-03-06 | 2020-03-06 | Electric energy meter |
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| CN111337719A true CN111337719A (en) | 2020-06-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010150923.0A Pending CN111337719A (en) | 2020-03-06 | 2020-03-06 | Electric energy meter |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105301554A (en) * | 2015-12-03 | 2016-02-03 | 国网重庆市电力公司电力科学研究院 | Electric energy metering loop high precision data synchronous sampling device and method |
| CN108170184A (en) * | 2018-01-11 | 2018-06-15 | 中国航空工业集团公司北京长城计量测试技术研究所 | A kind of circulating cooling type thermostatic case for micro pressure measuring |
| CN108181605A (en) * | 2018-02-05 | 2018-06-19 | 国网江西省电力有限公司电力科学研究院 | A kind of meter and the electric energy meter and detection method of temperature and Constant charge soil joint effect |
| CN109358219A (en) * | 2018-11-20 | 2019-02-19 | 华立科技股份有限公司 | Thermostat and electric energy meter |
| CN110045318A (en) * | 2019-05-17 | 2019-07-23 | 贵州电网有限责任公司 | The device and method that assessment dynamic harmonic and temperature change influence electric energy meter error |
| CN110597317A (en) * | 2019-09-24 | 2019-12-20 | 国网江苏省电力有限公司电力科学研究院 | Temperature flexible adjustable constant temperature tank for standard clock device |
-
2020
- 2020-03-06 CN CN202010150923.0A patent/CN111337719A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105301554A (en) * | 2015-12-03 | 2016-02-03 | 国网重庆市电力公司电力科学研究院 | Electric energy metering loop high precision data synchronous sampling device and method |
| CN108170184A (en) * | 2018-01-11 | 2018-06-15 | 中国航空工业集团公司北京长城计量测试技术研究所 | A kind of circulating cooling type thermostatic case for micro pressure measuring |
| CN108181605A (en) * | 2018-02-05 | 2018-06-19 | 国网江西省电力有限公司电力科学研究院 | A kind of meter and the electric energy meter and detection method of temperature and Constant charge soil joint effect |
| CN109358219A (en) * | 2018-11-20 | 2019-02-19 | 华立科技股份有限公司 | Thermostat and electric energy meter |
| CN110045318A (en) * | 2019-05-17 | 2019-07-23 | 贵州电网有限责任公司 | The device and method that assessment dynamic harmonic and temperature change influence electric energy meter error |
| CN110597317A (en) * | 2019-09-24 | 2019-12-20 | 国网江苏省电力有限公司电力科学研究院 | Temperature flexible adjustable constant temperature tank for standard clock device |
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Application publication date: 20200626 |