CN216979152U - Detection sensor - Google Patents
Detection sensor Download PDFInfo
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- CN216979152U CN216979152U CN202220413955.XU CN202220413955U CN216979152U CN 216979152 U CN216979152 U CN 216979152U CN 202220413955 U CN202220413955 U CN 202220413955U CN 216979152 U CN216979152 U CN 216979152U
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Abstract
The utility model relates to the technical field of partial discharge detection of high-voltage electrical equipment, and particularly discloses a detection sensor which comprises a shell, a signal output interface, an antenna oscillator plate, an electromagnetic wave absorption layer and an antenna protection layer, wherein the signal output interface is connected with the antenna oscillator plate; the shell is a groove-shaped cavity with one opened side in a shape like a Chinese character 'ji', the bottom surface of the cavity is opened, the cavity is hollow, fender boards extend outwards from two sides of the bottom of the cavity, and fixing long holes are formed in the fender boards; the signal output interface is arranged on the side surface of the shell; the antenna oscillator plate is positioned in the cavity of the shell; the electromagnetic wave absorption layer is positioned between the antenna oscillator plate and the bottom of the housing cavity; and the antenna protective layer is positioned outside the antenna oscillator plate and seals the antenna oscillator plate in the cavity of the shell. Compared with the prior art, the method for detecting the partial discharge in the GIS pouring hole has the advantages of small interference, high sensitivity, more accurate detection result of the sensor and higher precision.
Description
Technical Field
The utility model relates to the technical field of partial discharge detection of high-voltage electrical equipment, in particular to a detection sensor.
Background
The gas insulated metal enclosed switchgear (GIS for short) is used as an important high-voltage device in an extra-high voltage transformer substation, and whether the gas insulated metal enclosed switchgear operates normally or not is directly related to the reliability and stability of extra-high voltage engineering. Because GIS trouble is carried out the power failure and is overhauld and need a large amount of manpower and materials to the maintenance cycle length will influence the normal operating of whole electric wire netting. The GIS equipment is subjected to live detection, and the internal defect condition of the GIS equipment is detected and judged to be very important. Because GIS equipment is the totally closed jar body, outside metallic shield layer can shield electric signal and acoustic signal, and this kind of structure has influenced the external radiation of local discharge signal, to this kind of special structure, studies out and uses the superfrequency method to detect the local discharge of equipment inside on the pouring hole of GIS equipment basin formula insulator.
Because the size of the GIS basin-type insulator pouring hole is small, low-frequency discharge signals cannot be transmitted through the pouring hole, the frequency of the signals transmitted through the pouring hole is mainly concentrated above 1GHz, the detection frequency band of the existing GIS external ultrahigh-frequency sensor is generally 300MHz-1.5GHz and just comprises the working frequency band (750MHz-950MHz) of electronic signals of a mobile phone and the like, the detection frequency band of the external sensor is wide, and the detection method is poor in shielding, so that the signal-to-noise ratio received by most sensors is poor, and in order to improve the anti-interference performance of the sensors and the signal-to-noise ratio, the utility model realizes the inhibition of interference signals by adjusting the filling materials and the structure in the sensors and additionally arranging the shielding ring outside the sensors, and improves the signal-to-noise ratio of the sensors.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problems in the prior art to a certain extent. Therefore, the utility model provides a ultrahigh frequency detection sensor for a basin-type insulator pouring hole of a gas insulated metal-enclosed switchgear. Through the filling material and the structure in the sensor, the shielding ring is additionally arranged outside to realize the suppression of interference signals, and the signal-to-noise ratio of the sensor is improved.
In order to achieve the purpose, the specific technical scheme of the detection sensor is as follows:
a detection sensor comprises a shell, a signal output interface, an antenna oscillator plate, an electromagnetic wave absorption layer and an antenna protection layer; wherein:
the shell is a groove-shaped cavity with one opened side in a shape like a Chinese character 'ji', the bottom surface of the cavity is opened, the cavity is hollow, two sides of the bottom of the cavity extend outwards to form fender boards, and fixing long holes are formed in the fender boards;
the signal output interface is arranged on the side surface of the shell;
the antenna oscillator plate is positioned in the cavity of the shell;
the electromagnetic wave absorption layer is positioned between the antenna oscillator plate and the bottom of the housing cavity;
the antenna protective layer is positioned outside the antenna oscillator plate and seals the antenna oscillator plate in the cavity of the shell.
Optionally, the detection sensor further comprises a shielding ring, the shielding ring is arranged outside the antenna protection layer, two ends of the shielding ring are fixed to the bottom edge of the shell, and the middle of the shielding ring is bent into an arc shape towards the antenna protection layer.
Optionally, the radius of the curved arc of the shielding ring is 450 mm.
Optionally, the shielding ring is made of conductive fiber cloth foam.
Optionally, the shell is an aluminum alloy plate with a thickness of 2 mm.
Optionally, the antenna oscillator board is a glass fiber cloth-based copper-clad plate, and the distance between the antenna oscillator board and the bottom of the cavity of the housing is greater than 30 mm.
Optionally, the electromagnetic wave absorption layer is a cured epoxy resin layer and is coated with an electromagnetic wave absorption coating.
Optionally, the antenna protective layer is made of waterproof epoxy resin glue, and the exposed part of the antenna oscillator board and the shell connecting part are sealed in a waterproof mode.
Optionally, the signal output interface is a standard N-type coaxial connector.
Compared with the prior art, the detection sensor filled with the electromagnetic wave absorption material can reduce the receiving sensitivity of the sensor in a preset frequency band, and meanwhile, the shielding ring is additionally arranged outside the sensor, so that the anti-interference capability of the sensor is improved. Therefore, the detection sensor of the utility model has the technical effects that: the method has the advantages of small interference and high sensitivity when the GIS pouring hole detects partial discharge, and the sensor has more accurate detection result and higher precision.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a schematic structural diagram of an embodiment of the present invention;
FIG. 2 is a right side view of FIG. 1;
FIG. 3 is a cross-sectional view A-A of FIG. 2;
fig. 4 is a perspective view of an embodiment of the present invention.
Wherein: the antenna comprises a shell 1, an output interface 2, an antenna oscillator plate 3, an electromagnetic wave absorption layer 4, an antenna protection layer 5 and a shielding ring 6.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative and intended to explain the present invention and should not be construed as limiting the present invention.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless expressly stated or limited otherwise, the recitation of a first feature "on" or "under" a second feature may include the recitation of the first and second features being in direct contact, and may also include the recitation that the first and second features are not in direct contact, but are in contact via another feature between them. Also, the first feature "on," "above" and "over" the second feature may include the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is at a higher level than the second feature. "beneath," "under" and "beneath" a first feature includes the first feature being directly beneath and obliquely beneath the second feature, or simply indicating that the first feature is at a lesser elevation than the second feature.
The first embodiment is as follows:
the first embodiment of the present invention provides the following implementation manners:
as shown in fig. 1-4, in an alternative embodiment, a detection sensor is a gas insulated metal enclosed switchgear basin insulator pouring hole ultrahigh frequency detection sensor, and includes a housing 1, a signal output interface 2, an antenna oscillator plate 3, an electromagnetic wave absorption layer 4 and an antenna protection layer 5; the shell 1 is an aluminum alloy plate with the thickness of 2mm, is in the shape of a groove-shaped cavity with one opened side in a shape like a Chinese character 'ji', has an opened bottom surface, is hollow, and has two sides of the bottom extending outwards to form a fender plate which is provided with a fixing long hole for fixedly mounting a detection sensor; the signal output interface 2 is arranged on the side surface of the shell 1 and is a standard N-type coaxial connector; the antenna oscillator plate 3 is positioned at the opening position of the cavity of the shell 1, and a signal is connected to the signal output interface 2 of the shell 1 from the antenna oscillator plate 3 through a special ultrahigh frequency cable; the antenna oscillator plate 3 is made of a glass fiber cloth-based copper-clad plate, a broadband microwave receiving antenna is distributed on the antenna oscillator plate 3, and a cavity between the antenna oscillator plate 3 and the outer shell 1 is filled with an electromagnetic wave absorbing material; the filled electromagnetic wave absorption material is an electromagnetic wave absorption layer 4, and the detection sensor filled with the electromagnetic wave absorption layer 4 can reduce the receiving sensitivity of the sensor in a preset frequency band, so that the effect of shielding interference signals is achieved, and the anti-interference capability of the sensor is improved; the antenna protective layer 5 is made of waterproof epoxy resin glue and is positioned outside the antenna oscillator plate 3 to carry out waterproof sealing on the exposed part of the antenna oscillator plate 3 and the connecting part of the shell 1.
In some embodiments of the present invention, the antenna further includes a shielding ring 6, the shielding ring 6 is disposed outside the antenna protection layer 5, two ends of the shielding ring 6 are fixed to the bottom edge of the housing 1, and the middle portion of the shielding ring is bent towards the antenna protection layer 5 to form an arc shape, the bending radius of the arc shape is 450mm, the shielding ring 6 is made of conductive fiber cloth foam, and is made of conductive fiber cloth foam.
In some embodiments of the present invention, the distance between the antenna oscillator plate 3 and the bottom of the cavity of the housing 1 is greater than 30mm, which is beneficial to reflection of high-frequency electromagnetic waves, so that the antenna oscillator plate 3 has the maximum receiving sensitivity to the high-frequency electromagnetic waves.
In some embodiments of the present invention, the electromagnetic wave absorbing layer 4 is a cured epoxy resin layer, specifically, is composed of an electromagnetic wave absorbent, epoxy resin and a curing agent, and can absorb electromagnetic wave signals of 750MHz to 950MHz by using an electromagnetic wave absorbing material, so as to reduce the receiving sensitivity of the antenna oscillator board 3 to the frequency band, thereby achieving the purpose of anti-interference.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples described in this specification can be combined and combined by those skilled in the art.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (9)
1. A detection sensor is characterized by comprising a shell (1), a signal output interface (2), an antenna oscillator plate (3), an electromagnetic wave absorption layer (4) and an antenna protection layer (5);
the shell (1) is a groove-shaped cavity with one opened side in a shape like a Chinese character 'ji', the bottom surface of the cavity is opened, the cavity is hollow, two sides of the bottom of the cavity extend outwards to form a fender, and a fixing long hole is formed in the fender;
the signal output interface (2) is arranged on the side surface of the shell (1);
the antenna oscillator plate (3) is positioned in the cavity of the shell (1);
the electromagnetic wave absorption layer (4) is positioned between the antenna oscillator plate (3) and the bottom of the cavity of the shell (1);
the antenna protective layer (5) is located outside the antenna oscillator plate (3) and seals the antenna oscillator plate (3) in the cavity of the shell (1).
2. The detection sensor according to claim 1, further comprising a shielding ring (6), wherein the shielding ring (6) is disposed outside the antenna protection layer (5), two ends of the shielding ring are fixed on the bottom edge of the housing (1), and the middle of the shielding ring is curved into an arc shape towards the antenna protection layer (5).
3. The detection sensor according to claim 2, characterized in that the radius of the arc of curvature of the shielding ring (6) is 450 mm.
4. The detection sensor according to claim 2, wherein the shielding ring (6) is of a conductive fiber cloth-foam material.
5. The detection sensor according to any one of claims 1 to 4, wherein the outer case (1) is an aluminum alloy plate having a thickness of 2 mm.
6. The detection sensor according to claim 5, wherein the antenna oscillator board (3) is a fiberglass cloth-based copper-clad plate, and the distance between the antenna oscillator board (3) and the bottom of the cavity of the housing (1) is greater than 30 mm.
7. A detection sensor according to claim 5, characterized in that the electromagnetic wave absorption layer (4) is a cured epoxy layer and is coated with an electromagnetic wave absorption coating.
8. The detecting sensor according to claim 5, characterized in that the antenna protective layer (5) is a waterproof epoxy resin glue, and the exposed part of the antenna vibrator plate (3) and the connecting part of the housing (1) are sealed in a waterproof manner.
9. The detection sensor according to claim 5, characterized in that the signal output interface (2) is a standard N-type coaxial connector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220413955.XU CN216979152U (en) | 2022-02-28 | 2022-02-28 | Detection sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220413955.XU CN216979152U (en) | 2022-02-28 | 2022-02-28 | Detection sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216979152U true CN216979152U (en) | 2022-07-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220413955.XU Active CN216979152U (en) | 2022-02-28 | 2022-02-28 | Detection sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216979152U (en) |
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- 2022-02-28 CN CN202220413955.XU patent/CN216979152U/en active Active
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