CN219328892U - Electric energy remote data acquisition device with wireless data interface - Google Patents
Electric energy remote data acquisition device with wireless data interface Download PDFInfo
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- CN219328892U CN219328892U CN202223418510.XU CN202223418510U CN219328892U CN 219328892 U CN219328892 U CN 219328892U CN 202223418510 U CN202223418510 U CN 202223418510U CN 219328892 U CN219328892 U CN 219328892U
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Abstract
The utility model provides an electric energy remote data acquisition device with a wireless data interface, which comprises: a housing including a base having a receiving cavity and an upper cover adapted to the base; the wiring part is arranged at the lower end of the base and comprises a plurality of strong-current wiring terminals and weak-current wiring terminals; the PCB circuit board is arranged in the accommodating cavity of the base and comprises a power panel and a metering control panel; the display screen is arranged on the metering control panel and is exposed to the front surface of the shell through a display window arranged on the upper cover; the current transformer is arranged in the accommodating cavity of the base and is respectively connected with the strong-current wiring terminal and the PCB; wherein, the metering control board is provided with a metering module and a control module. The device can independently calculate errors based on the received pipeline pulse signals and the high-frequency pulse signals acquired by the self-metering module, is convenient to operate and low in upgrading cost.
Description
Technical Field
The utility model relates to the technical field of electric energy metering, in particular to an electric energy remote data acquisition device with a wireless data interface.
Background
The electric energy meter is a meter for measuring electric energy, also called an electric meter, and is a meter for measuring various electric quantities. Along with the rapid development of the economy in China, the electric energy requirements of various industries are larger and larger, and the daily office and home electricity consumption is also larger and larger, so that the electric energy meter is also larger and larger in demand. The existing electric energy meter which is gradually popularized is a multifunctional electric energy meter, and the multifunctional electric energy meter has a monitoring function, a control function, a management function and the like besides basic metering and storage functions. Meanwhile, the novel multifunctional electric energy meter pushed out by the national network has the function of sending wireless Bluetooth pulses, so that metering data and other data information can be transmitted to external equipment in a wireless communication mode, and remote management is facilitated.
Because the existing multifunctional electric energy meter is rich in functions and numerous in metering parameters, comprehensive verification and detection are needed when the electric energy meter leaves a factory, so that the electric energy meter leaves the factory is ensured to be accurate in metering and qualified in quality. Typically, the verification of the electric energy meter is performed on a verification line. The inspection assembly line is at least provided with one standard meter, and after the electric energy meter to be inspected is electrified on the inspection assembly line, the metering parameters are output to the assembly line, and the assembly line performs verification on metering data of the electric energy meter to be inspected.
And before the inspection assembly line starts to inspect the electric energy meter to be inspected, the assembly line needs to be subjected to verification correction. At this time, a check meter is needed to replace the electric energy meter to be checked to enter the assembly line. The existing check list working mode is as follows:
the voltage and current signals output by the power source of the inspection pipeline are connected into a check meter, the check meter generates a low-frequency pulse based on the measured electric energy and outputs the low-frequency pulse to the pipeline error system, and the pipeline calculates the electric energy based on a standard meter to generate a high-frequency signal. The pipeline error system calculates errors according to the high-frequency pulses of the standard table and the low-frequency pulses output by the check table. But this approach has the following drawbacks: because the error system is arranged on the assembly line, when the model parameters and the like of the electric energy meter to be detected change or the verification mode changes, the verification assembly line is required to be synchronously updated, the actual operation is troublesome, and the cost is high.
Disclosure of Invention
The utility model aims to provide an electric energy remote data acquisition device with a wireless data interface, which is used for replacing the existing check table to check and correct a check assembly line, improving the operation convenience and reducing the upgrading cost of the assembly line.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
an electrical energy remote data collection device with a wireless data interface, comprising:
a housing including a base having a receiving cavity and an upper cover adapted to the base;
the wiring part is arranged at the lower end of the base and comprises a plurality of strong-current wiring terminals and weak-current wiring terminals;
the PCB circuit board is arranged in the accommodating cavity of the base and comprises a power panel and a metering control panel;
the display screen is arranged on the metering control panel and is exposed to the front surface of the shell through a display window arranged on the upper cover;
the current transformer is arranged in the accommodating cavity of the base and is respectively connected with the strong-current wiring terminal and the PCB;
the metering control board is provided with a metering module and a control module, the metering module comprises an electric energy metering unit and a metering MCU, the control module comprises a control MCU, an error calculation unit and a communication unit, the metering MCU is used for outputting pulse isolation output signals to the inspection assembly line and outputting high-frequency pulse signals to the control module, and the error calculation unit is used for receiving low-frequency wireless pulse signals sent by the inspection assembly line and high-frequency pulse signals output by the metering module and calculating metering errors based on the low-frequency pulse signals and the high-frequency pulse signals.
In some embodiments, the strong-current connection terminal comprises three groups of current-voltage access terminals and a voltage zero-line access terminal corresponding to three-phase power, wherein the current access terminals are coupled with a first end of a current transformer, a second end of the current transformer is coupled with the metering control board, and the voltage access terminals are respectively coupled with the power panel and the metering control board.
In some embodiments, the electric energy metering unit comprises a high-precision AD and a sampling calculation chip, wherein the input end of the high-precision AD is coupled with the voltage access terminal and the second end of the current transformer, the output end of the high-precision AD is coupled with the signal input end of the sampling calculation chip, and the signal output end of the sampling calculation chip is coupled with the metering MCU.
In some embodiments, the power panel is provided with a voltage conversion circuit, an input end of the voltage conversion circuit is coupled with a voltage access terminal, and an output end of the voltage conversion circuit is coupled with the metering MCU and the control MCU to provide a stable low-voltage power supply.
In some embodiments, the communication unit includes a Wifi communication component and an RS 485 communication component.
In some embodiments, the weak current connection terminal includes an active high-access terminal, a reactive high-access terminal, and an RS 485A, B line access terminal.
In some embodiments, the power panel is mounted at the bottom of the base receiving cavity, and the metering control panel is mounted at the opening of the base receiving cavity.
The beneficial technical effects of the utility model are as follows:
1) The wireless data interface is configured, so that pulse signals sent by the inspection pipeline can be received, and the error calculation unit is configured, so that errors can be calculated independently based on the received pipeline pulse signals and high-frequency pulse signals acquired by the self metering module, and the operation is convenient.
2) The metering module and the control module are independently designed, and the control module can be upgraded according to the requirements, so that the electric energy meter type to be detected, the detection parameters and the error calculation mode can be adapted, and the cost of upgrading the detection assembly line is reduced.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the device of the present utility model.
Fig. 2 is a schematic view of the internal structure of the device according to the embodiment of the present utility model with the upper cover removed.
Fig. 3 is a schematic view of the internal structure of a base of an embodiment of the device of the present utility model.
FIG. 4 is a schematic diagram showing the functional module components and connection communication relationship on the metering board in the embodiment of the device of the present utility model.
Fig. 5 (a) is a schematic diagram of an error calculation mode of the conventional pipeline and the table lookup adaptation, and fig. 5 (b) is a schematic diagram of an error calculation mode of the device and the pipeline adaptation of the present utility model.
Detailed Description
For a further understanding of the present utility model, preferred embodiments of the utility model are described below in conjunction with the examples, but it should be understood that these descriptions are merely intended to illustrate further features and advantages of the utility model, and are not limiting of the claims of the utility model.
Referring to fig. 1-4, an embodiment of the present utility model provides an electric energy remote data collection device with a wireless data interface, comprising a housing 1, the housing 1 including a base 10 with a receiving cavity and an upper cover 11 adapted to the base. The lower end of the base 10 is provided with a wiring part including a plurality of strong-current wiring terminals 12 and weak-current wiring terminals 13. The accommodation chamber of the base 10 is also provided with a PCB circuit board, including a power panel 21 and a metering control panel 22. The base 10 is also provided with a display screen 14, and the corresponding upper cover 11 is provided with a display window matched with the display screen 14, so that the display screen 14 is exposed to the front surface of the shell 1 through the display window. In addition, the upper cover 11 is further provided with a nameplate mounting area, and the nameplate mounting area is provided with a protective flip cover 15.
Referring to fig. 2 and 3, a metering control board 22 is mounted to the housing cavity opening of the base 10 by several mounting posts 17 disposed within the housing cavity of the base. In addition, 3 transformers 16 are arranged in the accommodating cavity of the base 10, one end terminal of each transformer is connected with three current inputs on the strong current wiring terminal 12, and the other end terminal is connected with the metering control board 22.
Referring to fig. 1-3, in this embodiment, the heavy current connection terminal 12 includes three sets of current-voltage access terminals (each set including a voltage access, a current inflow and a current outflow terminal) corresponding to three-phase power, and a voltage neutral access terminal, wherein the current access terminals are coupled to a first end of the current transformer 16, and the voltage access terminals are respectively coupled to the power supply board 21 and the metering control board 22.
Referring to fig. 4, in this embodiment, a metering module and a control module are provided on metering control board 22. The metering module comprises an electric energy metering unit and a metering MCU, the electric energy metering unit comprises a high-precision AD and a sampling calculation chip, the input end of the high-precision AD is coupled with the voltage access terminal and the second end of the current transformer and is used for converting sampled voltage and current signals into digital signals, and the output end of the high-precision AD is coupled with the signal input end of the sampling calculation chip; the signal output end of the sampling calculation chip is coupled with the metering MCU and is used for outputting a sampling calculation result. The metering MCU is used for transmitting a wireless pulse signal to the inspection assembly line based on the pulse isolation output after conversion based on the signal output by the sampling calculation chip, and transmitting a high-frequency pulse output signal to the control module.
The control module comprises a control MCU, and an error calculation unit and a communication unit which are coupled with the control MCU. The error calculation unit receives the high-frequency pulse output signal sent by the metering module, receives the low-frequency wireless pulse signal sent by the inspection pipeline, calculates the metering error based on the high-frequency pulse output signal and the low-frequency pulse signal, and sends the calculated metering error to the control MCU. The control MCU is also coupled to the display 14 to drive the display to display information associated therewith.
As a preferred embodiment, in this example, the communication unit includes a Wifi communication component and an RS 485 communication component. The Wifi communication component is used for being connected with external equipment in a wireless mode so as to conduct parameter design and software upgrading on the control module.
Referring to fig. 1-3, in this embodiment, the weak current connection terminal 13 includes 16 connection terminals arranged, wherein 2 terminals are respectively used as an active high-voltage access terminal and a reactive high-voltage access terminal, the other two terminals are used as A, B line access terminals of RS 485, and the other terminals are used as spare terminals, and can be used according to actual requirements.
Referring to fig. 3, a power board 21 is mounted at the bottom of the receiving chamber of the base 10, and a voltage conversion circuit is disposed thereon. The input end of the voltage conversion circuit is coupled with the voltage access terminal, and the output end of the voltage conversion circuit is coupled with the metering MCU and the control MCU to provide a stable low-voltage power supply.
Referring to fig. 4, in this embodiment, the metering module and the control module are respectively and independently configured on the metering control board, and are connected based on SPI communication, so that the influence of the upgrade of the control module on the metering module is avoided.
Referring to fig. 5 (a), the existing checklist works in the following manner:
the voltage and current signals output by the power source of the inspection pipeline are connected into a check meter, the check meter generates a low-frequency pulse based on the measured electric energy and outputs the low-frequency pulse to the pipeline body error calculation system, and the pipeline itself calculates the electric energy based on a standard meter and generates a high-frequency signal. The pipeline line body error calculation system calculates errors according to the high-frequency pulses of the standard table and the low-frequency pulses output by the check table.
Referring to fig. 5 (b), the operation mode of the electric energy remote data collection device of the present utility model is as follows:
the device receives a voltage and current signal output by a power source of the inspection assembly line, and the electric energy calculated by the standard meter of the inspection assembly line is also transmitted to the device through a wireless low-frequency pulse signal; at the same time, the device itself can also generate a high-frequency pulse signal (generated by the metering module and sent to the control module) according to the sampled and calculated electric energy. Therefore, the error calculation unit can calculate the error according to the high-frequency pulse signal generated by the device and the low-frequency wireless pulse signal sent by the inspection pipeline. The error calculation formula is as follows:
setting: the pulse constant of the device is C Checking Checking the pulse constant of the standard table of the pipeline to be C Standard watch The number of test pulses is T, and the theoretical number of pulses is T Theory of The actual pulse number is T Actual practice is that of Error is E, then
Wherein T is Actual practice is that of And acquiring according to the high-frequency pulse signals generated by the device and the low-frequency wireless pulse signals sent by the inspection pipeline.
It should be noted that, because the metering MCU of the electric energy remote data acquisition device with the wireless data interface of the present utility model can also output pulse isolation output signals to the inspection pipeline (i.e. simulate the table to be inspected to generate a low frequency pulse to be output to the pipeline body error calculation system), it can also be used in the existing inspection table working mode similar to that described in fig. 5a, so that it can be flexibly used according to circumstances.
The above description of the embodiments is only for aiding in the understanding of the method of the present utility model and its core ideas. It should be noted that it will be apparent to those skilled in the art that various modifications and adaptations of the utility model can be made without departing from the principles of the utility model and these modifications and adaptations are intended to be within the scope of the utility model as defined in the following claims.
Claims (7)
1. An electrical energy remote data acquisition device having a wireless data interface, comprising:
a housing including a base having a receiving cavity and an upper cover adapted to the base;
the wiring part is arranged at the lower end of the base and comprises a plurality of strong-current wiring terminals and weak-current wiring terminals;
the PCB circuit board is arranged in the accommodating cavity of the base and comprises a power panel and a metering control panel;
the display screen is arranged on the metering control panel and is exposed to the front surface of the shell through a display window arranged on the upper cover;
the current transformer is arranged in the accommodating cavity of the base and is respectively connected with the strong-current wiring terminal and the PCB;
the metering control board is provided with a metering module and a control module, the metering module comprises an electric energy metering unit and a metering MCU, the control module comprises a control MCU, an error calculation unit and a communication unit, the metering MCU is used for outputting pulse isolation output signals to the inspection assembly line and outputting high-frequency pulse signals to the control module, and the error calculation unit is used for receiving low-frequency wireless pulse signals sent by the inspection assembly line and high-frequency pulse signals output by the metering module and calculating metering errors based on the low-frequency wireless pulse signals and the high-frequency pulse signals.
2. The electrical energy remote data collection device with wireless data interface of claim 1, wherein the strong electrical connection terminals comprise three sets of current-voltage access terminals and a voltage zero line access terminal corresponding to three phases of electricity, wherein the current access terminals are coupled to a first end of a current transformer, a second end of the current transformer is coupled to the metering control board, and the voltage access terminals are coupled to the power panel and the metering control board, respectively.
3. The device for remote data collection of electrical energy with wireless data interface of claim 2, wherein the electrical energy metering unit comprises a high-precision AD and a sampling calculation chip, wherein an input end of the high-precision AD is coupled to the voltage access terminal and the second end of the current transformer, an output end of the high-precision AD is coupled to a signal input end of the sampling calculation chip, and a signal output end of the sampling calculation chip is coupled to the metering MCU.
4. The remote data collection device with wireless data interface according to claim 2, wherein the power panel is configured with a voltage conversion circuit, the input end of the voltage conversion circuit is coupled to a voltage access terminal, and the output end of the voltage conversion circuit is coupled to the metering MCU and the control MCU to provide a stable low-voltage power supply.
5. The electrical energy remote data collection device with wireless data interface of claim 1, wherein the communication unit comprises a Wifi communication component and an RS 485 communication component.
6. The electrical energy remote data collection device with wireless data interface of claim 5, wherein the weak current connection terminal comprises an active high-access terminal, a reactive high-access terminal, and RS 485A, B-wire access terminals.
7. The remote data collection device with wireless data interface of any one of claims 1-6, wherein the power strip is mounted to a bottom of the base receiving cavity and the metering control board is mounted to an opening of the base receiving cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223418510.XU CN219328892U (en) | 2022-12-20 | 2022-12-20 | Electric energy remote data acquisition device with wireless data interface |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223418510.XU CN219328892U (en) | 2022-12-20 | 2022-12-20 | Electric energy remote data acquisition device with wireless data interface |
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| Publication Number | Publication Date |
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| CN219328892U true CN219328892U (en) | 2023-07-11 |
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| CN202223418510.XU Active CN219328892U (en) | 2022-12-20 | 2022-12-20 | Electric energy remote data acquisition device with wireless data interface |
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