CN217901879U - Half-wave current detection unit and system - Google Patents
Half-wave current detection unit and system Download PDFInfo
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- CN217901879U CN217901879U CN202121433835.8U CN202121433835U CN217901879U CN 217901879 U CN217901879 U CN 217901879U CN 202121433835 U CN202121433835 U CN 202121433835U CN 217901879 U CN217901879 U CN 217901879U
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- 238000012545 processing Methods 0.000 claims abstract description 16
- 238000004891 communication Methods 0.000 claims abstract description 7
- 238000002955 isolation Methods 0.000 claims description 5
- 238000004804 winding Methods 0.000 claims description 5
- 238000005259 measurement Methods 0.000 abstract description 6
- 230000005540 biological transmission Effects 0.000 abstract description 4
- 230000005611 electricity Effects 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- DMBHHRLKUKUOEG-UHFFFAOYSA-N diphenylamine Chemical compound C=1C=CC=CC=1NC1=CC=CC=C1 DMBHHRLKUKUOEG-UHFFFAOYSA-N 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000005070 sampling Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 229910000896 Manganin Inorganic materials 0.000 description 1
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- 239000004020 conductor Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
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Abstract
The utility model discloses a half-wave current detection unit and system, include: the device comprises an acquisition module, a processing module, a control module and a display module; the acquisition module comprises a current transformer and a Hall element; the processing module comprises an amplifier, a filter connected with the amplifier and an analog-to-digital converter connected with the filter; the Hall element is arranged at the opening of the magnetic core of the current transformer and connected with the amplifier, and the analog-to-digital converter is connected with the display module through the control module. The measurement of half-wave current is carried out in a mode that a current transformer is combined with a Hall sensor, and meanwhile, data transmission is carried out between the current transformer and a background terminal through a Beidou communication mode, so that the on-line detection of the half-wave current is realized.
Description
Technical Field
The utility model relates to an electric energy detects instrument technical field, especially relates to a half-wave current detection unit and system.
Background
The statements in this section merely provide background information related to the present disclosure and may not necessarily constitute prior art.
The series half-wave electricity stealing mode is that a half-wave rectifying circuit is added on the rear load side of the electric energy meter to convert sine wave current in a power supply line into half-wave current, and the direct current component in the half-wave signal is subjected to abnormity detection to judge electricity stealing behavior.
At present, a current transformer CT, a manganin shunt or a special current sampling circuit is mostly adopted to collect current; however, the above-mentioned method has the problems of magnetic core saturation, narrow bandwidth, electrical isolation, limited application range, etc., and most current sampling devices adopt a single current transformer to sample a certain current signal, so that the measurement range of the single sensor is limited.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem, the utility model provides a half-wave current detecting element and system adopts the mode that current transformer and hall sensor combined together to carry out the measurement of half-wave current, installs simultaneously additional and carries out data transmission through big dipper communication mode between big dipper communication module and backstage terminal, realizes the on-line measuring to half-wave current.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
in a first aspect, the utility model provides a half-wave current detection unit, include: the device comprises an acquisition module, a processing module, a control module and a display module; the acquisition module comprises a current transformer and a Hall element; the processing module comprises an amplifier, a filter connected with the amplifier and an analog-to-digital converter connected with the filter; the Hall element is arranged at the opening of a magnetic core of the current transformer and is connected with the amplifier, and the analog-to-digital converter is connected with the display module through the control module.
In an alternative embodiment, the magnetic core of the current transformer is a permanent magnet.
In an alternative embodiment, the magnetic core is in a toroidal configuration.
In an alternative embodiment, a secondary winding is provided on the core.
In an alternative embodiment, the analog-to-digital converter is connected with the control module through a photoelectric isolation circuit.
As an alternative embodiment, an analog-to-digital converter is connected downstream of the control module.
As an alternative embodiment, the half-wave current detection unit further comprises a storage module, and the storage module is connected with the control module.
As an optional implementation manner, the half-wave current detection unit further includes a power module, and the power module is electrically connected to the control module.
As an optional implementation mode, the half-wave current detection unit further comprises a housing, the acquisition module, the processing module, the control module and the display module are packaged in the housing, and a display screen is arranged outside the housing.
In a second aspect, the utility model provides a half-wave current detection system, include: the half-wave current detection unit of the first aspect communicates with the terminal through the Beidou communication module.
Compared with the prior art, the beneficial effects of the utility model are that:
the utility model discloses a mode that current transformer and hall element combined together carries out the measurement of half-wave current, and the magnetic core saturation that exists when solving single current transformer and measure, the bandwidth is narrow, application scope is narrow scheduling problem, extends the current measurement scope, improves measurement accuracy.
According to the invention, the half-wave current detection unit and the background terminal are communicated by Beidou so as to realize data transmission and realize on-line detection and positioning of the half-wave current.
Advantages of additional aspects of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
The accompanying drawings, which form a part of the specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without unduly limiting the scope of the invention.
Fig. 1 is a schematic view of a half-wave current detection unit provided in embodiment 1 of the present invention.
The specific implementation mode is as follows:
the present invention will be further explained with reference to the accompanying drawings and examples.
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the invention. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the invention. As used herein, the singular forms "a", "an", and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
In the present invention, the terms such as "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "side", "bottom", and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, and are only the terms determined for convenience of describing the structural relationship of each component or element of the present invention, and are not specific to any component or element of the present invention, and are not to be construed as limiting the present invention.
In the present invention, terms such as "fixedly connected", "connected", and the like are to be understood in a broad sense, and may be a fixed connection, or an integral connection or a detachable connection; may be directly connected or indirectly connected through an intermediate. The meaning of the above terms in the present invention can be determined according to specific situations by persons skilled in the art, and should not be construed as limiting the present invention.
Example 1
At present, a low-power low-voltage user steals electricity by means of half-wave electricity, a half-wave rectification circuit is added on the rear load side of an electric energy meter to convert sine wave current in a power supply line into half-wave current, and a direct current component in a half-wave signal enables an iron core of a current transformer to be saturated, so that metering is inaccurate, and metering of the electric energy meter is affected. Therefore, the present embodiment provides a half-wave current detection unit, which can be used for detecting a dc component in a half-wave current after sampling the half-wave current.
The half-wave current detecting unit for collecting half-wave current provided by this embodiment, as shown in fig. 1, specifically includes: the device comprises an acquisition module, a processing module, a control module and a display module; the acquisition module comprises a current transformer and a Hall element; the processing module comprises an amplifier, a filter connected with the amplifier and an analog-to-digital converter connected with the filter; the Hall element is arranged at the opening of the magnetic core of the current transformer and connected with the amplifier, and the analog-to-digital converter is connected with the display module through the control module.
In the embodiment, the current transformer is a straight-through current transformer, and the maximum range of the collected current can reach 500V/400A.
In this embodiment, the core of the current transformer is a permanent magnet, and can maintain its own magnetism even in the absence of an external magnetic field.
In this embodiment, the magnetic core has a ring structure.
Furthermore, the magnetic core adopts an open-loop type magnetic core structure.
In this embodiment, a secondary winding is disposed on the magnetic core; the current conductor passes through the magnetic core to act as a primary winding, and the secondary winding is uniformly wound on the magnetic core.
In this embodiment, the current transformer collects a half-wave current signal of a node to be measured, and transmits the half-wave current signal to a processing module connected with the hall element after passing through the hall element.
In this embodiment, the processing module sends the received half-wave current signal to the control module after sequentially processing the half-wave current signal by the amplifier, the filter and the analog-to-digital conversion;
furthermore, in this embodiment, a filter circuit is used to filter out higher harmonics of the half-wave current of more than 11 th order.
In this embodiment, the analog-to-digital converter is connected with the control module through the photoelectric isolation circuit to realize a protection effect on the half-wave current in the transmission process;
furthermore, photoelectric isolation circuits can also be connected between the acquisition module and the processing module as well as between the control module and the display module.
In the present embodiment, an analog-to-digital converter is connected after the control module.
Furthermore, the A/D converter is adopted as the analog-to-digital converter, in the processing module, the half-wave current signal output by the amplifier and the filter is subjected to analog-to-digital conversion to obtain a half-wave current digital signal, and the half-wave current digital signal is sent to the control module; in the control module, after carrying out digital-to-analog conversion on the received half-wave current digital signal, a half-wave current analog signal is obtained, and the half-wave current analog signal is sent to the display module.
Furthermore, the control module can adopt a single chip microcomputer of an STM32 model and the like.
In this embodiment, the display module uses a liquid crystal display to display the half-wave current data.
In this embodiment, the half-wave current detection unit further includes a storage module, and the storage module stores the half-wave current signal data after being connected to the control module.
Furthermore, the storage module adopts a RAM storage module.
In this embodiment, the half-wave current detection unit further includes a power module electrically connected to the control module.
It can be understood that the power module can also be connected with the acquisition module, the processing module and the display module.
Furthermore, the power supply module adopts a voltage-stabilized power supply circuit to provide stable working voltage and prolong the service life.
In this embodiment, this half-wave current detection unit still includes the shell, encapsulates above-mentioned module inside the shell, is equipped with the display screen in the shell outside, and the display screen is connected with control module.
Preferably, the shell is made of plastic or metal and is made of a mold.
Example 2
The embodiment provides a half-wave current detection system, including embodiment 1 a half-wave current detection unit, half-wave current detection unit carries out data communication through big dipper communication module and backstage terminal, can send the half-wave current signal who gathers to the terminal, satisfies the location and carries out short message data upload main website simultaneously.
It should be noted that the present invention provides a half-wave current detection unit and system, which is a structural scheme, wherein each of the related device units has a specific structure for realizing the function, and the related protocol, software or program for performing the work process between the related device units also has a structure in the prior art, and those skilled in the art are fully aware of the present invention.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Although the present invention has been described with reference to the accompanying drawings, it is not intended to limit the scope of the present invention, and those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without inventive work are still within the scope of the present invention.
Claims (10)
1. A half-wave current detection unit characterized by comprising: the device comprises an acquisition module, a processing module, a control module and a display module; the acquisition module comprises a current transformer and a Hall element; the processing module comprises an amplifier, a filter connected with the amplifier and an analog-to-digital converter connected with the filter; the Hall element is arranged at the opening of a magnetic core of the current transformer and is connected with the amplifier, and the analog-to-digital converter is connected with the display module through the control module.
2. A half-wave current detecting unit as claimed in claim 1, wherein a permanent magnet is used for a magnetic core of said current transformer.
3. The half-wave current detecting unit as claimed in claim 1, wherein said magnetic core has a ring-shaped configuration.
4. The half-wave current detecting unit according to claim 1, wherein a secondary winding is provided on said magnetic core.
5. The half-wave current detecting unit according to claim 1, wherein said analog-to-digital converter is connected to the control module through a photoelectric isolation circuit.
6. A half-wave current detecting unit as claimed in claim 1, characterized in that an analog-to-digital converter is connected after the control module.
7. The half-wave current detecting unit according to claim 1, further comprising a memory module, the memory module being connected to the control module.
8. The half-wave current detecting unit according to claim 1, further comprising a power module electrically connected to the control module.
9. The half-wave current detecting unit according to claim 1, further comprising a housing enclosing the collecting module, the processing module, the control module and the display module inside the housing, and a display screen outside the housing.
10. A half-wave current detection system, characterized by comprising the half-wave current detection unit of any one of claims 1 to 9, wherein the half-wave current detection unit communicates with a terminal through a Beidou communication module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121433835.8U CN217901879U (en) | 2021-06-25 | 2021-06-25 | Half-wave current detection unit and system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121433835.8U CN217901879U (en) | 2021-06-25 | 2021-06-25 | Half-wave current detection unit and system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217901879U true CN217901879U (en) | 2022-11-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121433835.8U Expired - Fee Related CN217901879U (en) | 2021-06-25 | 2021-06-25 | Half-wave current detection unit and system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217901879U (en) |
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2021
- 2021-06-25 CN CN202121433835.8U patent/CN217901879U/en not_active Expired - Fee Related
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Granted publication date: 20221125 |