CN212542658U - Wireless temperature sensor antenna for distribution network overhead line - Google Patents
Wireless temperature sensor antenna for distribution network overhead line Download PDFInfo
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- CN212542658U CN212542658U CN202020138936.1U CN202020138936U CN212542658U CN 212542658 U CN212542658 U CN 212542658U CN 202020138936 U CN202020138936 U CN 202020138936U CN 212542658 U CN212542658 U CN 212542658U
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Abstract
The utility model provides a join in marriage wireless temperature sensor antenna of net overhead line, include: a sensor antenna (1) and a surface acoustic wave sensor (2); the sensor antenna (1) is electrically connected with the surface acoustic wave sensor (2); the surface acoustic wave sensor (2) includes: a surface acoustic wave antenna (21) and a surface acoustic wave device (22); the surface acoustic wave antenna (21) is electrically connected with the surface acoustic wave device (22). The sensor antenna (1) comprises: a grounding cambered surface (11), a top reflecting surface (12) and a short circuit metal sheet (13); the grounding cambered surface (11) is connected with the top reflecting surface (12) through a short circuit metal sheet (13). The utility model provides a join in marriage wireless temperature sensor device temperature on-line sensing monitoring function of net overhead line, patrol and examine the manual work and become automatic on-line monitoring, improved and joined in marriage net overhead line power transmission's security.
Description
Technical Field
The utility model relates to a wireless temperature sensor field specifically relates to a join in marriage wireless temperature sensor antenna of net overhead line.
Background
The electric energy is an energy substance which cannot be separated from social production and people's life, in order to meet the increasingly developing demands of society, electric power systems in China are continuously developed, distribution network lines are used as important components in the electric power systems, the operation quality of the distribution network lines can affect the operation reliability of the whole electric power system, and as a power supply circuit is exposed in the air for a long time and is easily affected by the ambient temperature and humidity, the power supply circuit can be corroded and oxidized after long-term operation, so that poor contact and abnormal heating occur, the lines can be burnt out due to overheating in serious cases, and even fire disasters are caused. The occurrence of a fault is not a sudden process, and is generally a process that becomes qualitative due to a continuous increase in temperature, insulation aging, an increase in contact thermal resistance, and thermal breakdown after a leakage current increases to a certain extent. A traditional wireless temperature measuring sensor as disclosed in patent document CN103852179A includes a wireless transceiver antenna 1 and a mounting housing 3, the wireless transceiver antenna 1 and the mounting housing 3 are connected by a rotating shaft 2, and the outer ends of both sides of the mounting housing 3 are connected with a cylindrical member fixing device or a busbar fixing device by fixing bolts 7. Through continuous measurement and monitoring of the temperature of the overhead line cable, the fault trend of the overhead line cable can be predicted, the insulation aging condition of the overhead line cable can be known, the working state of the overhead line cable can be accurately evaluated, the fault hidden danger can be timely found, and an early warning signal can be sent out, so that the accidents of the overhead line cable can be effectively and fundamentally reduced. The distribution network overhead circuit wireless temperature measurement sensor takes electromagnetic waves as carriers to send temperature information and line coding information to the reader system, when the distribution network overhead circuit temperature is abnormal, the reader post-processing system can give an overtemperature warning signal in time, and a fault circuit can be quickly found through line coding, so that a large amount of troubleshooting time is saved, and power supply safety is improved.
The aerial cable in the prior art has the following technical problems:
1. the distribution network circuit has high voltage, and a common IC chip is easy to break down;
2. distribution network aerial temperature sensor need install on the cable, and sensor antenna structure can not influence the installation.
3. The overhead cables of the distribution network have three phases in total, three sensors need to be installed at the same time, and the three sensors cannot influence each other.
SUMMERY OF THE UTILITY MODEL
To the defect among the prior art, the utility model aims at providing a join in marriage wireless temperature sensor antenna of net overhead line.
According to the utility model provides a pair of join in marriage wireless temperature sensor antenna of net overhead line, include: a sensor antenna 1 and a surface acoustic wave sensor 2;
the sensor antenna 1 is electrically connected with the surface acoustic wave sensor 2;
the surface acoustic wave sensor 2 includes: a surface acoustic wave antenna 21 and a surface acoustic wave device 22;
the surface acoustic wave antenna 21 is electrically connected to a surface acoustic wave device 22.
Preferably, the sensor antenna 1 comprises: a grounding cambered surface 11, a top reflecting surface 12 and a short circuit metal sheet 13;
the grounding cambered surface 11 is connected with the top reflecting surface 12 through a short-circuit metal sheet 13.
Preferably, the sensor antenna 1 further comprises: a coaxial feed line 14;
the coaxial feed line 14 is mounted on the top reflective surface 12.
Preferably, the sensor antenna 1 further comprises: a printed wiring board 15;
the printed wiring board 15 is connected to the surface acoustic wave sensor 2.
Preferably, the sensor antenna 1 is connected to the saw sensor 2 by a coaxial feed line 14.
Preferably, the saw sensor 2 is soldered on the printed wiring board 15.
Preferably, the ground arc surface 11, the top reflection surface 12 and the short circuit metal sheet 13 are made of aluminum material.
Preferably, the top reflecting surface 12 is provided with grooves.
Preferably, the top reflecting surface 12 is arc-shaped.
Preferably, the top reflective surface 12 is integrally formed with the shorting metal sheet 13.
Compared with the prior art, the utility model discloses following beneficial effect has:
1. the utility model provides a join in marriage wireless temperature sensor device temperature on-line sensing monitoring function of net overhead line, patrol and examine the manual work and become automatic on-line monitoring, improved and joined in marriage net overhead line power transmission's security.
2. The surface acoustic wave device has the characteristics of high temperature resistance and high pressure resistance, and can work for a long time at 350 ℃ through testing, so that the surface acoustic wave device can work safely and reliably in an environment with voltage difference, which is incomparable with the traditional IC chip.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:
fig. 1 is the utility model provides a join in marriage wireless temperature sensor of net overhead line structure schematic diagram.
Fig. 2 is the utility model provides a join in marriage wireless temperature sensor antenna structure schematic diagram of net overhead line.
Fig. 3 is utility model provides a join in marriage return loss of net overhead line wireless temperature sensor antenna.
Figure 4 is utility model provides a join in marriage gain of net overhead line wireless temperature sensor antenna.
Figure 5 is utility model provides a join in marriage wireless temperature sensor antenna's of net overhead line radiation efficiency.
Figure 6 is utility model provides a join in marriage theory of net overhead line wireless temperature sensor antenna and read the distance.
Fig. 7 is the voltage distribution of distribution network overhead line wireless temperature sensor antenna under 10KV high pressure that utility model provides.
Detailed Description
The present invention will be described in detail with reference to the following embodiments. The following examples will assist those skilled in the art in further understanding the present invention, but are not intended to limit the invention in any way. It should be noted that various changes and modifications can be made by one skilled in the art without departing from the spirit of the invention. These all belong to the protection scope of the present invention.
As shown in fig. 1 to 7, according to the utility model provides a join in marriage wireless temperature sensor antenna of net overhead line, include: a sensor antenna 1 and a surface acoustic wave sensor 2; the sensor antenna 1 is electrically connected with the surface acoustic wave sensor 2; the surface acoustic wave sensor 2 includes: a surface acoustic wave antenna 21 and a surface acoustic wave device 22; the surface acoustic wave antenna 21 is electrically connected to a surface acoustic wave device 22. The sensor antenna 1 includes: a grounding cambered surface 11, a top reflecting surface 12 and a short circuit metal sheet 13; the grounding cambered surface 11 is connected with the top reflecting surface 12 through a short-circuit metal sheet 13. In a preferred embodiment, the 433MHz wireless temperature sensor antenna for the distribution network overhead line comprises a grounding arc surface, a top reflecting surface, a short-circuit metal sheet, a coaxial feeder line and a Printed Circuit Board (PCB), wherein the ground is generally parallel to the radiating surface and used for reflecting signals, the short-circuit metal sheet is used for connecting the radiating unit and the grounding surface, and two ends of the coaxial feeder line are connected with a chip and used for signal transmission. The top reflecting surface and the grounding cambered surface have the same circle center, so the distance between the top reflecting surface and the grounding cambered surface is equal everywhere. The open end to the feed can be equivalent to the parallel connection of a resistor and a capacitor, and the short end to the feed can be equivalent to the series connection of a resistor and an inductor. The length of the radiating element is adjusted to adjust the frequency of the antenna to about 433MHz, then the widths of the short circuit metal sheet and the radiating element are adjusted to make the return loss of the PIFA antenna at 433MHz be below-20 dB, and the matching of the antenna can be further optimized to be below-30 dB by continuously increasing the widths of the short circuit metal sheet and the radiating element, and the actual size and installation are considered without further increase. The surface acoustic wave device is welded on the PCB through a conductive metal wire; the size of the PCB printed circuit is 20 × 17 × 1mm, the PCB printed circuit is electrically connected with the antenna radiation unit and the ground plane of the wireless temperature sensor through coaxial feeders, the PCB printed circuit is led out from the side edge and placed on the surface of a cable, and the upper lead and the lower lead are fixed on the surface of the antenna through metal screws. The advantage of this feeding is that the sensor can be placed in any suitable position by controlling the length of the leads of the sensor chip.
In a preferred embodiment, the top slotted structure a of the top reflective surface 12 of the sensor antenna increases the effective length of the current to lower the resonant frequency, the distance between the short-circuit metal sheet 13 and the coaxial feed line 14 is used to adjust the impedance and bandwidth of the antenna, and in the case that the other dimensions of the antenna are not changed, when the distance between the short-circuit metal sheet 13 and the coaxial feed line 14 is increased, the bandwidth is correspondingly increased, but at the same time, the resonant frequency is increased. The arc length of the top reflective surface 12 is critical to the resonant frequency of the antenna, with longer arc lengths leading to lower antenna resonant frequencies. In a preferred embodiment, the ground surface and the radiation unit are both arc-shaped, so that the radiation unit is conveniently installed on a cylindrical cable, and the ground surface is designed and optimized to obtain higher radiation efficiency and directivity coefficient. The width of radiator is 70mm, and the diameter is 90mm, and the radian is 230, and the width of ground connection cambered surface is 90mm, and the diameter is 60.4mm, and the radian is 245, and the top fluting width is 5mm, and the length of short circuit sheetmetal is 70 mm. The radiating element and the ground plane are two parts respectively, so that the production difficulty and the cost are reduced.
Further, the sensor antenna 1 further includes: a coaxial feed line 14; the coaxial feed line 14 is mounted on the top reflective surface 12. The sensor antenna 1 further includes: a printed wiring board 15; the printed wiring board 15 is connected to the surface acoustic wave sensor 2. The sensor antenna 1 is connected to the saw sensor 2 by a coaxial feed line 14. In a preferred embodiment, fig. 3 shows the return loss of the antenna simulation result, and it can be seen from the result that the resonant frequency of the antenna is 428MHz, S11 is-20.6, and the matching is good. Fig. 4 is a three-dimensional gain diagram of the antenna, it can be seen from the diagram that the maximum gain of the antenna is 1.4dB, fig. 5 is the radiation efficiency of the antenna, fig. 6 is the theoretical reading distance of the antenna, which is calculated by the Friss transmission distance equation, and it can be seen from the calculation result that the theoretical reading distance of the antenna reaches 31m, which meets the actual requirement. Fig. 7 shows the voltage distribution of the antenna under a high voltage of 10KV, and it can be seen from fig. 7 that a voltage difference exists between two ends of a feed point of the antenna, so that the conventional IC chip is easily broken down, and the surface acoustic wave sensor can withstand a high voltage of 110KV through a test, so that the surface acoustic wave sensor is very suitable for online temperature detection of a distribution network overhead line under a high-voltage environment.
Further, the surface acoustic wave sensor 2 is soldered on the printed wiring board 15; the grounding cambered surface 11, the top reflecting surface 12 and the short circuit metal sheet 13 are made of aluminum materials; a groove is arranged on the top reflecting surface 12; the top reflecting surface 12 is arc-shaped; the top reflective surface 12 is integrally formed with the short circuit metal sheet 13. In a preferred embodiment, the sensor antenna is made of metal aluminum, is light and not easy to corrode, and is installed on the rubber shell and electrically connected with the surface acoustic wave sensor. The surface acoustic wave sensor 2 is composed of a surface acoustic wave antenna 21 and a surface acoustic wave device 22, the surface acoustic wave antenna 21 is electrically connected with the surface acoustic wave device 22, and the surface acoustic wave device 22 is a main passive wireless sensing element and can finish the mutual conversion of electric signals and mechanical waves. Variations in parameters of the saw device 22 can be sensitive to various environmental parameters, such as temperature, pressure, etc., by design.
In a preferred embodiment, the distribution network overhead line cable 433MHz wireless temperature measurement sensor antenna structure is as shown in fig. 2, the antenna is composed of a grounding arc surface, a top reflection surface, a short circuit metal sheet, a coaxial feeder line and a printed circuit board PCB, in order to save cost in actual production, the top reflection surface and the short circuit metal sheet are one part, the grounding arc surface is one part, the top reflection surface and the short circuit metal sheet are fixed through a conductive metal screw, and finally, the surface of the antenna is insulated through anodic oxidation treatment on the surface of an aluminum metal plate. The antenna dielectric substrate is air, the relative dielectric constant is 1, one end of a feed point is arranged on the radiating unit, the other end of the feed point is arranged on the ground plane, holes are formed in the positions of the feed point, two metal conducting wires are fixed through screws respectively and welded at the positions of the upper surface and the lower surface of the PCB printed circuit for windowing, and the metal conducting wires can adjust corresponding lengths within a certain range according to actual temperature measuring positions. The model is simulated by CST electromagnetic simulation software, and finally the return loss of the obtained antenna is shown in figure 3, wherein the resonance frequency of the antenna is 428MHz, S11 is-20.6, and the matching is good. Fig. 4 is a three-dimensional gain diagram of the antenna, it can be seen from the diagram that the maximum gain of the antenna is 1.56dB, fig. 5 is the radiation efficiency of the antenna, fig. 6 is the theoretical reading distance of the antenna, which is calculated by the Friss transmission distance equation, and it can be seen from the calculation result that the theoretical reading distance of the antenna reaches 31m, which meets the actual requirement. Meanwhile, as can be seen from fig. 7, voltage difference exists between two ends of a feed point of the antenna, the traditional IC chip is easy to break down, and the surface acoustic wave sensor can resist 110KV high voltage through testing, so that the surface acoustic wave sensor is very suitable for online temperature detection of the distribution network overhead line in a high-voltage environment. In the embodiment, a worker can read the temperature of the overhead line of the distribution network through the remote monitoring system at any time, and if the temperature exceeds a set value, relevant measures are taken.
In the description of the present application, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present application.
The foregoing description of the specific embodiments of the invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes or modifications may be made by those skilled in the art within the scope of the appended claims without departing from the spirit of the invention. The embodiments and features of the embodiments of the present application may be combined with each other arbitrarily without conflict.
Claims (9)
1. The utility model provides a join in marriage wireless temperature sensor antenna of net overhead line which characterized in that includes: a sensor antenna (1) and a surface acoustic wave sensor (2);
the sensor antenna (1) is electrically connected with the surface acoustic wave sensor (2);
the surface acoustic wave sensor (2) includes: a surface acoustic wave antenna (21) and a surface acoustic wave device (22);
the surface acoustic wave antenna (21) is electrically connected with the surface acoustic wave device (22);
the sensor antenna (1) comprises: a grounding cambered surface (11), a top reflecting surface (12) and a short circuit metal sheet (13);
the grounding cambered surface (11) is connected with the top reflecting surface (12) through a short circuit metal sheet (13).
2. The distribution network overhead line wireless thermometric sensor antenna according to claim 1, wherein the sensor antenna (1) further comprises: a coaxial feed line (14);
the coaxial feed line (14) is mounted on the top reflective surface (12).
3. The distribution network overhead line wireless thermometric sensor antenna according to claim 1, wherein the sensor antenna (1) further comprises: a printed wiring board (15);
the printed circuit board (15) is connected with the surface acoustic wave sensor (2).
4. The distribution network overhead line wireless temperature sensor antenna according to claim 2, characterized in that the sensor antenna (1) is connected with the surface acoustic wave sensor (2) by a coaxial feeder (14).
5. The distribution network overhead line wireless temperature sensor antenna according to claim 3, characterized in that the SAW sensor (2) is soldered on a printed circuit board (15).
6. The distribution network overhead line wireless temperature sensor antenna according to claim 1, wherein the grounding arc surface (11), the top reflection surface (12) and the short circuit metal sheet (13) are made of aluminum material.
7. The distribution network overhead line wireless temperature sensor antenna according to claim 1, wherein the top reflecting surface (12) is provided with a groove.
8. The distribution network overhead line wireless temperature sensor antenna according to claim 1, wherein the top reflecting surface (12) is arc-shaped.
9. The distribution network overhead line wireless temperature sensor antenna according to claim 1, wherein the top reflecting surface (12) is integrally formed with the short circuit metal sheet (13).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922475667 | 2019-12-31 | ||
| CN2019224756678 | 2019-12-31 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212542658U true CN212542658U (en) | 2021-02-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020138936.1U Active CN212542658U (en) | 2019-12-31 | 2020-01-21 | Wireless temperature sensor antenna for distribution network overhead line |
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| Country | Link |
|---|---|
| CN (1) | CN212542658U (en) |
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- 2020-01-21 CN CN202020138936.1U patent/CN212542658U/en active Active
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