CN220820112U - Multi-user metering system of electric energy meter - Google Patents
Multi-user metering system of electric energy meter Download PDFInfo
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- CN220820112U CN220820112U CN202322600846.6U CN202322600846U CN220820112U CN 220820112 U CN220820112 U CN 220820112U CN 202322600846 U CN202322600846 U CN 202322600846U CN 220820112 U CN220820112 U CN 220820112U
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Abstract
The utility model discloses a multi-user metering system of an electric energy meter, which comprises: the device comprises a microcontroller, a voltage input signal sampling module, a current switching module, a first current input signal sampling module and a second current input signal sampling module, wherein the voltage input signal sampling module is connected with a voltage input end of the microcontroller, the first current input signal sampling module and the second current input signal sampling module are electrically connected with the current switching module, and the first current input signal sampling module and the second current input signal sampling module are connected with a current input end of the microcontroller through the current switching module. Under the condition that the original voltage and current sampling circuit is unchanged, an instantaneous power acquisition and voltage and current loop switching circuit is introduced, and after sampling, the accumulated sum of instantaneous power is compared with a fixed accumulated value to meter electric energy, so that multipath metering can be realized, the stability of electric energy multipath metering is greatly improved, and meanwhile, the metering range is enlarged.
Description
Technical Field
The utility model relates to the technical field of electric energy meter equipment, in particular to a multi-user metering system of an electric energy meter
Background
The multi-loop electric energy meter is used as a product of the period, and technically meets the high-precision metering of electric energy, the high standard requirements of intelligent control and centralized management in the electric power industry.
Disclosure of utility model
The utility model aims to provide a multi-user metering system of an electric energy meter, which is simple in circuit and good in metering linearity.
In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows: an electric energy meter multi-user metering system, the metering system comprising: the device comprises a microcontroller, a voltage input signal sampling module, a current switching module, a first current input signal sampling module and a second current input signal sampling module, wherein the voltage input signal sampling module is connected with a voltage input end of the microcontroller, the first current input signal sampling module and the second current input signal sampling module are electrically connected with the current switching module, and the first current input signal sampling module and the second current input signal sampling module are connected with a current input end of the microcontroller through the current switching module.
Preferably, the microcontroller is provided with a gain amplifier, an A/D conversion circuit, a digital processing circuit and a high-pass filter which are mutually connected by wires, the output end of the gain amplifier is connected with the input ends of the A/D conversion circuit and the digital processing circuit, the output end of the gain amplifier outputs an alternating voltage current signal to the A/D conversion circuit and the digital processing circuit, and the high-pass filter is used for filtering drift signals.
Preferably, the voltage input end of the microcontroller comprises a Vin+ voltage input pin and a Vin-voltage input pin, and the power of the voltage input signal sampling module is electrically connected with the Vin+ voltage input pin and the Vin-voltage input pin.
Preferably, the current input end of the microcontroller comprises an Iin+ current input pin and an Iin-current input pin, and the current output end of the current switching module is electrically connected with the Iin+ current input pin and the Iin-current input pin.
Preferably, the microcontroller is an electric energy metering chip.
Compared with the prior art, the utility model has the advantages that:
Under the condition that the original voltage and current sampling circuit is unchanged, an instantaneous power acquisition and voltage and current loop switching circuit is introduced, and after sampling, the accumulated sum of instantaneous power is compared with a fixed accumulated value to meter electric energy, so that multipath metering can be realized, the stability of electric energy multipath metering is greatly improved, and meanwhile, the metering range is enlarged;
The system has simple circuit and low manufacturing cost, and the linearity of measurement can be ensured only by calibrating the voltage, current, power and phase of one path, so that the debugging efficiency of a product applying the method is improved;
The measurement is completed by directly operating the instantaneous power, the running and starting can be controlled by the accumulated threshold value of the instantaneous power, and the electric energy is measured by comparing the accumulated sum of the instantaneous power with a fixed accumulated value, so that the pulse indicator lamp can be driven by a microcontroller to output, and the output frequency can be formulated according to the requirement.
Drawings
In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a circuit diagram of a multi-user metering system of an electric energy meter according to the present utility model.
In the figure: the device comprises a microcontroller 1, an 11Vin+ voltage input pin, a 12 Vin-voltage input pin, a 13Iin+ current input pin, a 14 Iin-current input pin, a2 voltage input signal sampling module, a 3 first current input signal sampling module, a 4 current switching module and a 5 second current input signal sampling module.
Description of the embodiments
The preferred embodiments of the present utility model will be described in detail below with reference to the accompanying drawings so that the advantages and features of the present utility model can be more easily understood by those skilled in the art, thereby making clear and defining the scope of the present utility model.
Referring to fig. 1, the present utility model provides a multi-user metering system of an electric energy meter, the metering system includes: the microcontroller 1, 2 voltage input signal sampling module 2, current switching module 4, first current input signal sampling module 3 and second current input signal sampling module 4, voltage input signal sampling module 2 is connected with the voltage input of microcontroller 1, and voltage input signal sampling module 2 is voltage input signal acquisition circuit among the prior art, and first current input signal sampling module 3 and second current input signal sampling module 5 are current input signal acquisition circuit among the prior art, first current input signal sampling module 3 and second current input signal sampling module 5 all with current switching module 4 electric connection, current switching module 4 is current switching circuit among the prior art, and first current input signal sampling module 3 and second current input signal sampling module 5 are connected with the current input of microcontroller 1 through current switching module 4.
In this embodiment, the microcontroller 1 is provided with a gain amplifier, an a/D conversion circuit, a digital processing circuit and a high-pass filter (not identified in the figure) connected with each other by wires, the output end of the gain amplifier is connected with the input ends of the a/D conversion circuit and the digital processing circuit, the output end of the gain amplifier outputs an ac voltage and current signal to the a/D conversion circuit and the digital processing circuit, and the high-pass filter is used for filtering the drift signal.
In this embodiment, the voltage input terminal of the microcontroller 1 includes a vin+ voltage input pin 11 and a Vin-voltage input pin 12, and the power of the voltage input signal sampling module 2 is electrically connected to the vin+ voltage input pin 11 and the Vin-voltage input pin 12.
In this embodiment, the current input end of the microcontroller 1 includes an iin+ current input pin 13 and an Iin-current input pin 14, and the current output end of the current switching module 4 is electrically connected to the iin+ current input pin 13 and the Iin-current input pin 14.
In this embodiment, the microcontroller 1 is an electric energy metering chip, and the model is ATM90E36A-AU-R.
The specific operation steps are as follows: the voltage signal is input into the microcontroller 1 through a vin+ voltage input pin 11 and a Vin-voltage input pin 12; the current signal is input into the microcontroller 1 through the voltage input signal sampling module 2, then the current switching module 4 performs loop switching, and then the current signal is input into the microcontroller 1 through the current differential input Iin+ current input pin 13 and the Iin-current input pin 14 respectively;
It should be noted that, the acquisition frequency of the instantaneous power must meet the nyquist-shannon theorem to ensure the signal integrity;
Finally, the microcontroller 1 outputs corresponding alternating voltage and current signals to the digital processing circuit of the post-stage A/D conversion circuit through the output end of the internal gain amplifier for metering.
Although the embodiments of the present utility model have been described with reference to the accompanying drawings, the patentees may make various modifications or alterations within the scope of the appended claims, and are intended to be within the scope of the utility model as described in the claims.
Claims (5)
1. A multi-user metering system for an electric energy meter, the metering system comprising: the device comprises a microcontroller, a voltage input signal sampling module, a current switching module, a first current input signal sampling module and a second current input signal sampling module, wherein the voltage input signal sampling module is connected with a voltage input end of the microcontroller, the first current input signal sampling module and the second current input signal sampling module are electrically connected with the current switching module, and the first current input signal sampling module and the second current input signal sampling module are connected with a current input end of the microcontroller through the current switching module.
2. The electric energy meter multi-user metering system of claim 1, wherein: the microcontroller is provided with a gain amplifier, an A/D conversion circuit, a digital processing circuit and a high-pass filter which are mutually connected through wires, the output end of the gain amplifier is connected with the input ends of the A/D conversion circuit and the digital processing circuit, the output end of the gain amplifier outputs alternating voltage and current signals to the A/D conversion circuit and the digital processing circuit, and the high-pass filter is used for filtering drift signals.
3. The electric energy meter multi-user metering system of claim 1, wherein: the voltage input end of the microcontroller comprises a Vin+ voltage input pin and a Vin-voltage input pin, and the power of the voltage input signal sampling module is electrically connected with the Vin+ voltage input pin and the Vin-voltage input pin.
4. The electric energy meter multi-user metering system of claim 1, wherein: the current input end of the microcontroller comprises an Iin+ current input pin and an Iin-current input pin, and the current output end of the current switching module is electrically connected with the Iin+ current input pin and the Iin-current input pin.
5. The electric energy meter multi-user metering system of claim 1, wherein: the microcontroller is an electric energy metering chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322600846.6U CN220820112U (en) | 2023-09-25 | 2023-09-25 | Multi-user metering system of electric energy meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322600846.6U CN220820112U (en) | 2023-09-25 | 2023-09-25 | Multi-user metering system of electric energy meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220820112U true CN220820112U (en) | 2024-04-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322600846.6U Active CN220820112U (en) | 2023-09-25 | 2023-09-25 | Multi-user metering system of electric energy meter |
Country Status (1)
| Country | Link |
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| CN (1) | CN220820112U (en) |
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2023
- 2023-09-25 CN CN202322600846.6U patent/CN220820112U/en active Active
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