Dielectric adaptive antenna and preparation method thereof

Abstract

The present invention relates to a dielectric adaptive antenna and a preparation method thereof, and relates to the field of wireless information transmission. The dielectric adaptive antenna comprises: an oil radiator, an air radiator, a grounding plate, a filling medium and a connecting joint; the oil radiator, the air radiator and the grounding plate are connected to each other in pairs; the filling medium is filled in a cavity formed by the oil radiator, the air radiator and the grounding plate; the connecting joint is connected to the oil radiator and the air radiator respectively. The present invention can improve the effect of signal transmission.

Description

Technical Field

[0001] The present invention relates to the field of wireless information transmission, and in particular to a dielectric adaptive antenna and a preparation method thereof. Background Art

[0002] Smart sensor components are installed at key equipment of smart grids and monitor key parameters of each equipment operation, so that smart grids can respond to changing environments in a timely manner. Among them, oil-filled equipment is a very important type of power equipment, which often operates in a higher voltage environment. Monitoring its internal status has always been a difficult point. In the past, wired sensors had a series of problems such as wiring difficulties and insulation effects, whether they were used for testing or monitoring in operation. With the widespread application of wireless sensors, especially passive wireless sensors, monitoring of oil status has become a more convenient option.

[0003] However, the transmission characteristics of wireless signals in oil are somewhat different from those in air. In particular, severe signal refraction occurs at the interface between insulating oil and other media, which makes it impossible to effectively send and receive wireless signals, and causes wireless sensors to fail to work. Most antenna solutions designed for air introduce additional dielectric protection, which causes severe refraction at the interface between insulating oil, greatly reducing the transmission effect. At the same time, there is an oil-air interface in the oil-filled equipment, which makes it difficult to optimize the frequency and bandwidth of the antenna design for a single medium, affecting the final wireless transmission effect of the antenna. Summary of the invention

[0004] The object of the present invention is to provide a dielectric adaptive antenna and a preparation method thereof, so as to improve the effect of signal transmission.

[0005] To achieve the above object, the present invention provides the following solutions:

[0006] A dielectric adaptive antenna comprises: an oil radiator, an air radiator, a ground plate, a filling medium and a connecting joint;

[0007] The oil radiator, the air radiator and the grounding plate are connected to each other in pairs; the filling medium is filled in the cavity formed by the oil radiator, the air radiator and the grounding plate; and the connecting joint is connected to the oil radiator and the air radiator respectively.

[0008] Optionally, the radiator in the oil includes a front surface of the radiator in the oil, a side surface of the radiator in the oil and a bottom surface of the radiator in the oil that are connected in sequence; the front surface of the radiator in the oil and the bottom surface of the radiator in the oil are both perpendicular to the side surface of the radiator in the oil and are arranged on different sides of the side surface of the radiator in the oil; the connecting joint is arranged on the side surface of the radiator in the oil; the bottom surface of the radiator in the oil is mechanically connected to the grounding plate.

[0009] Optionally, an oil-radiator gap is provided on the front side of the oil-radiator; a connecting joint hole is provided on the side of the oil-radiator; and the connecting joint is fixed through the connecting joint hole by the filling medium.

[0010] Optionally, the air radiator includes an air radiator front surface, an air radiator side surface and an air radiator bottom surface connected in sequence; the air radiator front surface and the air radiator bottom surface are both perpendicular to the air radiator side surface and are arranged on different sides of the air radiator side surface; the air radiator bottom surface is mechanically connected to the ground plate.

[0011] Optionally, an air radiator gap is arranged on the front side of the air radiator.

[0012] Optionally, the length of the front side of the oil radiator is greater than the length of the front side of the air radiator; the height of the side of the oil radiator is equal to the height of the side of the air radiator.

[0013] Optionally, the filling height of the filling medium is greater than or equal to the height of the side surface of the oil radiator and the height of the side surface of the air radiator.

[0014] Optionally, the sum of the lengths of the oil radiator and the air radiator is smaller than the length of the grounding plate.

[0015] Optionally, the oil radiator, the air radiator and the grounding plate are all made of stainless steel; and the filling medium is made of Teflon or epoxy resin.

[0016] A method for preparing a dielectric adaptive antenna, the method for preparing a dielectric adaptive antenna is used to prepare the dielectric adaptive antenna described above, and the method for preparing a dielectric adaptive antenna comprises:

[0017] The radiator material is used to prepare an oil radiator and an air radiator by using a sheet metal method;

[0018] The oil radiator and the air radiator are respectively subjected to mechanical processing to obtain a machined oil radiator and a machined air radiator;

[0019] The machined oil radiator, the machined air radiator and the grounding plate are connected by welding;

[0020] A filling medium is poured into the cavity formed by the oil radiator, the machined air radiator and the grounding plate by pouring, and a connecting joint is poured into the filling medium.

[0021] According to the specific embodiments provided by the present invention, the present invention discloses the following technical effects:

[0022] The oil radiator, the air radiator and the grounding plate of the present invention are connected to each other in pairs; the filling medium is filled in the cavity formed by the oil radiator, the air radiator and the grounding plate; the connecting joint is connected to the oil radiator and the air radiator respectively. The dielectric adaptive antenna provided by the present invention realizes direct contact between the radiator and the medium without using a protective medium, thus avoiding the loss of wireless signals at the interface and improving the effect of signal transmission. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0024] Figure 1 A schematic diagram of the structure of a dielectric adaptive antenna provided by the present invention;

[0025] Figure 2 A three-dimensional diagram of the dielectric adaptive antenna provided by the present invention;

[0026] Figure 3 It is a side view of the radiator in oil;

[0027] Figure 4 This is the front view of the radiator in oil;

[0028] Figure 5 It is a top view of the radiator in oil;

[0029] Figure 6 It is a stereogram of a radiator in oil;

[0030] Figure 7 This is the front view of the air radiator;

[0031] Figure 8 It is the right side view of the air radiator;

[0032] Fig. 9 It is a top view of the air radiator;

[0033] Fig.10 It is a three-dimensional diagram of an air radiator.

[0034] Explanation of symbols:

[0035] 1- radiator in oil; 2- radiator in air; 3- grounding plate; 4- filling medium; 5- connection joint; 6- radiator connection line; 11- gap of radiator in oil; 12- connection joint hole; 21- gap of air radiator. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] The purpose of the present invention is to provide a dielectric adaptive antenna and a preparation method thereof to improve the effect of signal transmission

[0038] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0039] like Figure 1-Figure 10 As shown, a dielectric adaptive antenna provided by the present invention is used for wireless transmission inside oil-filled equipment, including: a radiator 1 in oil, an air radiator 2, a grounding plate 3, a filling medium 4 and a connecting joint 5; in actual application, the dielectric adaptive antenna also includes a radiator connecting line 6.

[0040] The oil radiator 1, the air radiator 2 and the grounding plate 3 are connected to each other in pairs; the filling medium 4 is filled in the cavity formed by the oil radiator 1, the air radiator 2 and the grounding plate 3; the connecting joint 5 is connected to the oil radiator 1 and the air radiator 2 respectively. Specifically, the oil radiator 1 is mechanically and electrically connected to the grounding plate 3, the air radiator 2 is mechanically and electrically connected to the grounding plate 3, and the connecting joint 5 is mechanically and electrically connected to the oil radiator 1 and the air radiator 2 through the radiator connecting line 6. The oil radiator 1, the air radiator 2 and the grounding plate 3 are connected by welding. The oil radiator 1 and the air radiator 2 are in direct contact with the transmission medium, and the connecting joint 5 is fixed by the poured filling medium 4.

[0041] In practical applications, the radiator in oil 1 includes a front surface of the radiator in oil, a side surface of the radiator in oil and a bottom surface of the radiator in oil which are connected in sequence; the front surface of the radiator in oil and the bottom surface of the radiator in oil are perpendicular to the side surface of the radiator in oil and are arranged on different sides of the side surface of the radiator in oil; the connecting joint 5 is arranged on the side surface of the radiator in oil; the bottom surface of the radiator in oil is mechanically connected to the grounding plate 3.

[0042] In practical applications, an oil-radiator gap 11 is provided on the front of the oil-radiator; a connecting joint hole 12 is provided on the side of the oil-radiator; and the connecting joint 5 is fixed through the connecting joint hole 12 by the filling medium 4 .

[0043] In practical applications, the air radiator 2 includes an air radiator front surface, an air radiator side surface and an air radiator bottom surface which are connected in sequence; the air radiator front surface and the air radiator bottom surface are both perpendicular to the air radiator side surface and are arranged on different sides of the air radiator side surface; the air radiator bottom surface is mechanically connected to the ground plate 3.

[0044] In practical applications, an air radiator gap 21 is provided on the front of the air radiator. The length of the oil radiator 1 is greater than the length of the air radiator 2; specifically, the length of the front of the oil radiator is greater than the length of the front of the air radiator; the height of the side of the oil radiator is equal to the height of the side of the air radiator. The filling height of the filling medium 4 is greater than or equal to the height of the side of the oil radiator and the height of the side of the air radiator. The highest height of the filling medium 4 does not exceed the height of the oil radiator 1 and the air radiator 2. The sum of the lengths of the oil radiator 1 and the air radiator 2 is less than the length of the grounding plate 3. The length of the oil radiator gap 11 is greater than the air radiator gap 21. The oil radiator gap 11 and the air radiator gap 21 are used to adjust the frequency of the antenna.

[0045] In practical applications, the oil radiator 1, the air radiator 2 (polytetrafluoroethylene) and the grounding plate 3 are all made of stainless steel; the filling medium 4 is made of Teflon or epoxy resin.

[0046] The connection joint hole 12 is used to allow the connection joint 5 to pass through the air without mechanically contacting the oil radiator 1. The oil radiator gap 11 and the air radiator gap 21 are two independent parts, and there is no matching problem. However, considering the difference between the oil medium and the air medium, the length of the oil radiator gap 11 is always longer than the length of the air radiator gap 21. The geometric parameters of the oil radiator gap 11 and the air radiator gap 21 determine the RF parameters of the antenna. Therefore, the RF electromagnetic parameters (bandwidth, impedance, etc.) of the antenna are adjusted by adjusting the geometric parameters (length, width) of the oil radiator gap 11 and the air radiator gap 21. Therefore, the geometric parameters can be optimized for the oil medium and the air medium respectively to obtain optimized antenna parameters, so that the best antenna performance can be achieved in each medium.

[0047] The two radiators, the oil radiator 1 and the air radiator 2, are connected by a feeder and a connection joint 5. When the antenna is immersed in oil, the oil radiator 1 has the best antenna performance and plays a major transmission role. The bandwidth of the air radiator 2 drifts due to the change of the medium and does not play a transmission role. When the antenna is completely exposed to the oil medium, the air radiator 2 has the best antenna performance and plays a major transmission role. The bandwidth of the oil radiator 1 drifts due to the change of the medium and does not play a transmission role. The switching of the two radiators is adaptively changed by changing the medium, and no action process is required.

[0048] The dielectric adaptive antenna provided by the present invention has the following advantages:

[0049] By using stainless steel materials, mechanical connection structures and direct contact between the radiator and the medium, no protective medium is used, which avoids the loss of wireless signals at the interface and improves the effect of signal transmission. By setting two different antenna radiators, the parameters of the radiator in the oil and the radiator in the air can be optimized differently according to the transmission medium to obtain the best frequency and bandwidth characteristics in their respective media. At the same time, the two radiators are connected in parallel to the sensor. When the medium changes, it can adaptively switch to the most suitable radiator, further improving the effect of signal transmission.

[0050] The present invention also provides a method for preparing a dielectric adaptive antenna, the method for preparing a dielectric adaptive antenna is used to prepare the dielectric adaptive antenna described above, and the method for preparing a dielectric adaptive antenna comprises:

[0051] The radiator material is used to prepare an oil radiator and an air radiator by using a sheet metal method;

[0052] The oil radiator and the air radiator are respectively subjected to mechanical processing to obtain a machined oil radiator and a machined air radiator;

[0053] The machined oil radiator, the machined air radiator and the grounding plate are connected by welding;

[0054] A filling medium is poured into the cavity formed by the oil radiator, the machined air radiator and the grounding plate by pouring, and a connecting joint is poured into the filling medium.

[0055] The present invention also provides working steps of the method for preparing a dielectric adaptive antenna in practical application, which are specifically as follows:

[0056] (1) Obtain oil radiators and air radiators by sheet metal method.

[0057] (2) A connection hole is obtained by machining the side of the radiator in oil.

[0058] (3) The oil radiator gap and the air radiator gap are respectively obtained on the front sides of the oil radiator and the air radiator by machining.

[0059] (4) Connect the radiator connecting wire to the oil radiator, the air radiator and the connecting joint respectively by welding, and pass the connecting joint through the connecting joint hole.

[0060] (5) Connect the oil radiator and the air radiator to the grounding plate respectively by welding.

[0061] (6) The filling medium is poured into the cavity formed by the oil radiator, the air radiator and the grounding plate by pouring, and the connecting joint and the radiator connecting line are poured and fixed inside the filling medium.

[0062] The present invention provides a dielectric adaptive antenna for wireless transmission inside oil-filled equipment, comprising: a radiator in oil, an air radiator, a ground plate, a filling medium, a connecting joint, and a radiator connecting line. Aiming at the problem of wireless signal refraction attenuation caused by the change of transmission characteristics of the dielectric interface inside the oil-filled equipment, the present invention sets radiators with different physical structures for the insulating oil medium and the air medium respectively, so that the wireless signal can be better transmitted and received at both the insulating oil interface and the air interface, thereby improving the transmission stability of the wireless signal inside the oil-filled equipment.

[0063] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0064] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the device and its core ideas of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A dielectric adaptive antenna, characterized in that: include: Radiators in oil, radiators in air, grounding plates, filling media and connecting joints; The oil radiator, the air radiator and the grounding plate are connected to each other in pairs; the filling medium is filled in the cavity formed by the oil radiator, the air radiator and the grounding plate; the connecting joint is connected to the oil radiator and the air radiator respectively; The oil radiator comprises a front surface of the oil radiator, a side surface of the oil radiator and a bottom surface of the oil radiator which are connected in sequence; the front surface of the oil radiator and the bottom surface of the oil radiator are both perpendicular to the side surface of the oil radiator and are arranged on different sides of the side surface of the oil radiator; the connecting joint is arranged on the side surface of the oil radiator; the bottom surface of the oil radiator is mechanically connected to the grounding plate; The front side of the oil radiator is provided with an oil radiator gap; the side of the oil radiator is provided with a connecting joint hole; the connecting joint is fixed through the connecting joint hole by the filling medium; The air radiator comprises a front surface of the air radiator, a side surface of the air radiator and a bottom surface of the air radiator which are connected in sequence; the front surface of the air radiator and the bottom surface of the air radiator are both perpendicular to the side surface of the air radiator and are arranged on different sides of the side surface of the air radiator; the bottom surface of the air radiator is mechanically connected to the ground plate.

2. The dielectric adaptive antenna according to claim 1, characterized in that: An air radiator gap is arranged on the front side of the air radiator.

3. The dielectric adaptive antenna according to claim 1, characterized in that: The length of the front side of the oil radiator is greater than the length of the front side of the air radiator; the height of the side of the oil radiator is equal to the height of the side of the air radiator.

4. The dielectric adaptive antenna according to claim 1, characterized in that: The filling height of the filling medium is greater than or equal to the height of the side surface of the oil radiator and the height of the side surface of the air radiator.

5. The dielectric adaptive antenna according to claim 1, characterized in that: The sum of the lengths of the oil radiator and the air radiator is smaller than the length of the grounding plate.

6. The dielectric adaptive antenna according to claim 1, characterized in that: The oil radiator, the air radiator and the grounding plate are all made of stainless steel; the filling medium is made of Teflon or epoxy resin.

7. A method for preparing a dielectric adaptive antenna, characterized in that: The method for preparing a dielectric adaptive antenna is used to prepare the dielectric adaptive antenna according to any one of claims 1 to 6, and the method for preparing a dielectric adaptive antenna comprises: The radiator material is used to prepare an oil radiator and an air radiator by using a sheet metal method; The oil radiator and the air radiator are respectively subjected to mechanical processing to obtain a machined oil radiator and a machined air radiator; The machined oil radiator, the machined air radiator and the grounding plate are connected by welding; A filling medium is poured into the cavity formed by the oil radiator, the machined air radiator and the grounding plate by pouring, and a connecting joint is poured into the filling medium.

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