S-band weather radar transmit-receive branch loss detection system and feed source shielding case thereof

Abstract

The utility model discloses a feed source shielding case, which comprises a case body with a reflection cavity inside, and a reflection layer capable of reflecting electromagnetic waves is arranged on the inner wall of the reflection cavity. The assembly end of the cover body is provided with a reflection opening for electromagnetic waves to pass through, the reflection opening is communicated with the reflection cavity, the cover body is installed on a radar feed source, and the reflection opening is matched with the signal end of the radar feed source in an aligned mode. The feed source shielding cover can be matched with a radar feed source, so that the detection process of the loss of the transmitting and receiving branch of the S-band weather radar is simpler, more convenient, more feasible, more accurate and more efficient, and frequent disassembly and assembly of devices in a detection system can be effectively avoided, so that stable operation of the devices is ensured, the overall operation reliability of system equipment is improved, and the cost is reduced. And the overall operation cost and the maintenance difficulty of the equipment are correspondingly reduced. The utility model also discloses an S-band weather radar transmit-receive branch loss detection system using the feed source shielding case.

Description

Technical Field

[0001] This utility model relates to the technical field of weather radar signal detection and its supporting detection equipment, and in particular to a feed shield. This utility model also relates to an S-band weather radar transceiver branch loss detection system using the feed shield. Background Technology

[0002] Transceiver branch loss is a crucial parameter in radar signal transmission. It refers to the power loss generated during radio frequency signal transmission and reception, specifically the radio frequency transmission loss between the feedhorn and the receiver front end, and between the radar transmitter and the feedhorn. These losses typically include the transmission losses of the feed lines and related components.

[0003] Weather radar plays a crucial role in current weather monitoring and forecasting services. To further improve the quality of observational data from the new generation of S-band weather radars across the entire network and fully leverage their pivotal role in weather forecasting services, it is essential not only to ensure the stable performance of the weather radar itself but also to ensure the accurate calibration of its fundamental parameters. Among these, the transmit / receive path loss, as a core parameter affecting the reflectivity factor of weather radar, is particularly critical in its accuracy.

[0004] When measuring the transceiver losses of S-band next-generation weather radars, the traditional methods currently used in the industry require a cumbersome operation process. This typically involves disassembling and assembling multiple supporting components and connecting them to coaxial conversion equipment to measure the transmission and reception losses for different polarizations. This process usually takes 4-5 hours, consuming a significant amount of time and limiting the overall measurement efficiency of the equipment. Furthermore, the frequent disassembly and assembly of related devices and components during this operation can easily damage the devices, reducing their reliability and increasing the difficulty of equipment maintenance and operating costs. This also causes many inconveniences in measuring the transceiver losses of related weather radars.

[0005] In view of this, how to optimize the layout structure of the S-band weather radar transceiver branch loss detection system to make its detection process simpler, easier, more accurate and efficient, while avoiding frequent disassembly and assembly of components, ensuring the reliability of equipment operation, and correspondingly reducing the equipment operating cost and maintenance difficulty are important technical problems that need to be solved by those skilled in the art. Utility Model Content

[0006] The purpose of this invention is to provide a feed shield that can be used in conjunction with a radar feed, thereby making the detection process of transceiver branch loss in S-band weather radar simpler, easier, more accurate, and more efficient. It also effectively avoids frequent disassembly and reassembly of components in the detection system, ensuring stable operation of each component, improving the overall reliability of the system, and correspondingly reducing overall operating costs and maintenance difficulty. Another purpose of this invention is to provide an S-band weather radar transceiver branch loss detection system using the aforementioned feed shield.

[0007] To solve the above-mentioned technical problems, this utility model provides a feed shield, including a cover with a reflective cavity inside, wherein a reflective layer capable of reflecting electromagnetic waves is provided on the inner wall of the reflective cavity.

[0008] The mounting end of the cover has a reflective port for electromagnetic waves to pass through. The reflective port is connected to the reflective cavity. The cover is mounted on the radar feed source, and the reflective port is aligned and adapted to the signal end of the radar feed source.

[0009] Preferably, it also includes a mounting assembly, through which the shroud is detachably connected to the radar feed.

[0010] Preferably, the outer edge of the reflector port is provided with an annular end plate. The mounting assembly includes a pressure strip and bolts. The pressure strip, the annular end plate, and the radar feed are arranged sequentially along the axial direction of the reflector port and assembled by bolts so that the annular end plate is clamped and embedded between the pressure strip and the radar feed.

[0011] Preferably, the pressure strip is an arc-shaped component that is coaxially arranged with and fits the annular end plate.

[0012] Preferably, the number of pressure strips is at least two, and each pressure strip is arranged sequentially along the circumference of the annular end plate and connected end to end.

[0013] Preferably, the reflective layer is a silver-plated layer.

[0014] Preferably, the cover is made of aluminum.

[0015] This utility model also provides an S-band weather radar transceiver branch loss detection system, including a transmitter, a receiver, and a radar feed, and also includes a measuring device connected to the output of the receiver. The transmitter and the radar feed are connected by a transmission branch, and the radar feed and the receiver are connected by a receiving branch. The feed shield is a feed shield as described in any of the above.

[0016] Compared to the aforementioned background technology, the feed shield provided by this utility model reliably installs the shield onto the radar feed of the weather radar system during component installation, ensuring precise alignment and connection between the reflector port and the signal end of the radar feed. This guarantees that the electromagnetic waves emitted from the signal end of the radar feed can accurately enter the reflective cavity through the reflector port. During the transmission and reception branch loss detection operation of the weather radar, the transmitter output sends an electromagnetic wave signal into the transmission branch, which then transmits the signal to the radar feed. The electromagnetic wave is then emitted from the signal end of the radar feed, enters the reflective cavity through the reflector port, and is reflected by the reflective layer on the inner wall of the reflective cavity. It then exits the reflective cavity again through the reflector port and re-enters the signal end of the radar feed. These reflected electromagnetic waves are transmitted from the radar feed to the receiver input via the receiving branch, and then from the receiver output to the downstream measuring device for power measurement of the electromagnetic wave signals fed back from the radar feed. After the power of the electromagnetic wave signal is measured, the power of the electromagnetic wave signal measured at the receiver output is compared with the initial power of the electromagnetic wave signal emitted by the transmitter, and then subtracted. This yields the loss of the electromagnetic wave signal during transmission through the entire transceiver branch, thus completing the detection operation for weather radar signals. Because a feed shield installed at the radar feed is used as a reflection terminal device for the electromagnetic wave signal, the signal is completely reflected at the feed shield before being transmitted to the receiver via the receiving branch. This eliminates the need for frequent disassembly and reassembly of related branches and components during the signal detection process, significantly reducing the operation time required for the detection operation and greatly improving the overall operational efficiency. The entire detection process for weather radar signals is smooth and efficient, the related components operate stably, and the detection data is accurate and reliable, thereby optimizing the detection effect of the transceiver branch loss of the weather radar. Based on this, the assembly and connection of each functional component and device are relatively constant, eliminating the need for frequent disassembly and assembly, and effectively avoiding the problem of component damage caused by frequent disassembly and assembly. As a result, the maintenance difficulty of related components and devices is reduced accordingly, and the overall equipment operating cost of the S-band weather radar transceiver branch loss detection system is also reduced accordingly.

[0017] In another preferred embodiment of this utility model, the feed shield further includes a mounting assembly, and the shield body is detachably connected to the radar feed via the mounting assembly. Thus, by using the mounting assembly as a matching connection device between the shield body and the radar feed body, the shield body can be reliably installed at the radar feed while allowing for flexible disassembly and assembly. This allows the feed shield to be promptly removed from the radar feed when inspection, maintenance, or replacement of the feed shield and its related components is required. After the corresponding inspection, maintenance, or replacement work is completed, the shield body can be reliably connected to the radar feed body using the mounting assembly. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 A schematic diagram of the component layout of an S-band weather radar transceiver branch loss detection system provided in a specific embodiment of this utility model.

[0020] Figure 2 for Figure 1 A perspective view of the assembly structure between the center feed shield and the radar feed.

[0021] Figure 3 for Figure 2 Top view;

[0022] Figure 4 for Figure 2 Front view of the central feed source shielding cover;

[0023] Figure 5 for Figure 4 Top view;

[0024] Figure 6 To and Figure 2 Top view of the structure of the pressure strip that fits the middle cover.

[0025] in:

[0026] 11-Cover body; 111-Reflective cavity; 112-Reflective layer; 113-Reflective port; 114-Annular end plate;

[0027] 12-Pressure strip; 121-Screw hole;

[0028] 13-Transmitter;

[0029] 14-Receiver;

[0030] 15-Radar feed; 151-Transmitter branch; 152-Receiver branch. Detailed Implementation

[0031] The core of this invention is to provide a feed shield that can be used in conjunction with a radar feed, thereby making the detection process of transceiver branch loss in S-band weather radar simpler, easier, more accurate, and more efficient. It also effectively avoids frequent disassembly and reassembly of components in the detection system, ensuring stable operation of each component, improving the overall reliability of the system, and correspondingly reducing overall operating costs and maintenance difficulty. Another objective of this invention is to provide an S-band weather radar transceiver branch loss detection system using the aforementioned feed shield; this invention also provides an S-band weather radar transceiver branch loss detection system using the aforementioned feed shield.

[0032] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0033] Please refer to the reference. Figures 1 to 6 .

[0034] In a specific embodiment, the feed shield provided by this utility model includes a cover body 11 with a reflective cavity 111 inside, and a reflective layer 112 capable of reflecting electromagnetic waves is provided on the inner wall of the reflective cavity 111.

[0035] The mounting end of the cover 11 has a reflective port 113 for electromagnetic waves to pass through. The reflective port 113 is connected to the reflective cavity 111. The cover 11 is mounted on the radar feed 15, and the reflective port 113 is aligned and adapted to the signal end of the radar feed 15.

[0036] During the specific equipment component installation process, the cover 11 is reliably installed on the radar feed 15 of the weather radar system, and the reflector 113 is precisely aligned and connected with the signal end of the radar feed 15, so as to ensure that the electromagnetic waves emitted by the signal end of the radar feed 15 can be accurately injected into the reflector cavity 111 through the reflector 113.

[0037] When performing the transmission and reception branch loss detection operation of the weather radar, the output of the transmitter 13 sends an electromagnetic wave signal into the transmission branch 151 so that the electromagnetic wave signal can be transmitted to the radar feed 15 via the transmission branch 151. Then, the electromagnetic wave is emitted from the signal end of the radar feed 15. The emitted electromagnetic wave enters the reflection cavity 111 through the reflection port 113. After the electromagnetic wave is reflected at the reflection layer 112 on the inner wall of the reflection cavity 111, it is emitted again from the reflection cavity 111 through the reflection port 113 and re-enters the signal end of the radar feed 15. These reflected electromagnetic waves are transmitted from the radar feed 15 to the input end of the receiver 14 via the receiving branch 152, and then sent from the output end of the receiver 14 to the downstream measuring device so that the power of these electromagnetic wave signals fed back by the radar feed 15 can be measured.

[0038] After the power measurement of the electromagnetic wave signal is completed, the electromagnetic wave signal power measured at the output of receiver 14 is compared with the initial power of the electromagnetic wave signal emitted at transmitter 13 and then subtracted to obtain the loss of the entire transceiver branch during the transmission of the electromagnetic wave signal, thereby completing the transceiver branch loss detection operation for weather radar.

[0039] By employing a feed shield installed at the radar feed 15 as a reflection terminal for electromagnetic wave signals, the electromagnetic wave signals are completely reflected at the feed shield before being transmitted to the receiver 14 via the receiving branch 152. This eliminates the need for frequent disassembly and reassembly of related branches and components during the signal detection process, significantly reducing the operation time required for detection and greatly improving overall operational efficiency. The entire detection process for the transceiver branch loss of the weather radar is smooth and efficient, with stable operation of related components and accurate and reliable detection data, thus optimizing the branch loss detection effect of the weather radar. Furthermore, the assembly and connection of various functional components and devices are relatively constant, eliminating the need for frequent disassembly and reassembly, effectively avoiding component damage caused by frequent disassembly and reassembly. This reduces the maintenance difficulty of related components and devices, and consequently lowers the overall equipment operating cost of the S-band weather radar transceiver branch loss detection system.

[0040] It is important to note that, within this field, weather radar is a type of meteorological radar and a crucial tool for effectively monitoring and issuing early warnings of severe weather. Weather radar utilizes radio (electromagnetic wave) technology to primarily detect and analyze the characteristics of meteorological targets such as clouds, rain, snow, and hail. Different wavebands of electromagnetic waves have different wavelengths; for example, the X-band wavelength is approximately 3cm, the C-band approximately 5cm, and the S-band approximately 10cm. This results in different structural dimensions for the transmission waveguides and feed sources for different wavebands. The feed shield dimensions and related adaptation parameters provided in this solution are generally applicable to S-band (approximately 10cm wavelength) weather radar. Unless otherwise specified, the rest of the content in this document can be understood by referring to this section and will not be elaborated further.

[0041] Specifically, the feed shield also includes an installation assembly, through which the shield 11 is detachably connected to the radar feed 15. Thus, by using the installation assembly as a connecting device between the shield 11 and the radar feed 15, the shield 11 can be reliably installed on the radar feed 15 while allowing for flexible disassembly and assembly. This allows the feed shield to be promptly removed from the radar feed 15 when inspection, maintenance, or replacement of the feed shield and its related components is required. After the necessary inspection, maintenance, or replacement work is completed, the shield 11 can be reliably connected to the radar feed 15 using the installation assembly.

[0042] More specifically, an annular end plate 114 protrudes from the outer edge of the reflector 113. The mounting assembly includes a pressure strip 12 and bolts. The pressure strip 12, the annular end plate 114, and the radar feed 15 are arranged sequentially along the axial direction of the reflector 113 and assembled by bolt alignment, so that the annular end plate 114 is clamped and embedded between the pressure strip 12 and the radar feed 15. The annular end plate 114 can serve as the main connection part of the cover 11, so as to reliably align and fit with the corresponding mounting surfaces of the pressure strip 12 and the radar feed 15, thereby ensuring the connection strength between the cover 11 and the main body of the radar feed 15 and improving the structural reliability of the equipment.

[0043] Based on this, several threaded holes 121 are arranged on the annular end plate 114 and the pressure strip 12 to be matched one-to-one with the bolt threads. Thus, the bolts are used as connecting parts between the cover 11, the pressure strip 12 and the radar feed 15. This not only ensures the assembly strength between the cover 11 and the radar feed 15 body and simplifies the component connection structure, but also allows the bolts to be removed from each threaded hole 121 when necessary, so that the cover 11 and the pressure strip 12 can be removed from the radar feed 15 body to meet the needs of related feed shield inspection, maintenance or replacement operations.

[0044] Generally, to accommodate the shape of the radar feed 15, the dome 11 is typically designed as a cylindrical structure, the reflector 113 is also arranged as a circular opening, and the annular end plate 114 is also adapted to be an annular structure. Based on this, the pressure strip 12 can be designed as an integral annular structure, or it can be an arc-shaped component as shown in the figure, so that the pressure strips 12 can be coaxially assembled to fully fit the annular end plate 114.

[0045] Accordingly, the number of pressure strips 12 is at least two, and each pressure strip 12 is arranged sequentially along the circumference of the annular end plate 114 and assembled with the ends grounded. For example... Figure 6 As shown, if two pressure strips 12 are used to complete the fitting and installation with the annular end plate 114, the central angle corresponding to the arc of a single pressure strip 12 is 180°; if three pressure strips 12 are used to complete the assembly with the annular end plate 114, the central angle corresponding to the arc of a single pressure strip 12 is 120°; if four pressure strips 12 are used to complete the assembly with the annular end plate 114, the central angle corresponding to the arc of a single pressure strip 12 is 90°. It is easy to see that the sum of the central angles of all pressure strips 12 after the overall assembly is completed is 360°, that is, all pressure strips 12 are spliced ​​to complete a full circle of assembly. However, in practical applications, for the purpose of optimizing local structural stress or reducing component processing costs, it is also possible to choose to arrange the pressure strips 12 with circumferential gaps. In principle, as long as the alignment and fitting of the pressure strips 12 and the annular end plate 114 can be guaranteed, and the actual assembly of the feed shield is required, it is acceptable.

[0046] Furthermore, it should be noted that the structural shape and size of the cover 11, the reflector port 113, and the reflector cavity 111 can be flexibly selected and adjusted according to the structural shape and size of the radar feed 15 to be matched. Adaptive matching design can also be carried out in combination with other operating condition parameters. In principle, as long as it can meet the actual application needs of the feed shield, it is acceptable.

[0047] In specific applications, the reflective layer 112 is silver-plated to ensure that it has good electromagnetic wave reflection performance. Of course, other materials that can reflect electromagnetic waves can also be selected as the main material of the reflective layer 112 according to the actual working conditions. In principle, as long as it can ensure efficient reflection of electromagnetic waves to meet the detection requirements of the transceiver branch loss of weather radar, it is acceptable.

[0048] On the other hand, the cover 11 is made of aluminum. Aluminum is lightweight and easy to process. Using aluminum as the main material for the cover 11 can further reduce the difficulty of disassembly, assembly, storage, and transportation, and appropriately optimize its processing difficulty and manufacturing cost. Of course, in practical applications, the cover 11 can also be made of other metals or non-metals, but in principle, it should be ensured that the selected processing material will not adversely affect the transmission of electromagnetic wave signals, so as to meet the application requirements of the corresponding feed shield.

[0049] In a specific embodiment, the S-band weather radar transceiver loss detection system provided by this utility model includes a transmitter 13, a receiver 14, and a radar feed 15. It also includes a measuring device connected to the output of the receiver 14. A transmitting branch 151 connects the transmitter 13 and the radar feed 15, and a receiving branch 152 connects the radar feed 15 and the receiver 14. A feed shield is provided on the radar feed 15, which is the feed shield described above. The feed shield of this S-band weather radar transceiver loss detection system can cooperate with the radar feed 15, thereby making the transceiver loss detection process of the S-band weather radar simpler, easier, more accurate, and more efficient. It can also effectively avoid frequent disassembly and reassembly of components in the detection system, thus ensuring the stable operation of each component, improving the overall reliability of the system, and correspondingly reducing the overall operating cost and maintenance difficulty.

[0050] In summary, the feed shield provided in this invention reliably installs the shield onto the radar feed of the weather radar system during component installation, ensuring precise alignment and connection between the reflector and the signal end of the radar feed. This guarantees that electromagnetic waves emitted from the radar feed signal end can accurately enter the reflector cavity through the reflector. When the equipment is started up to perform signal loss measurement of the weather radar, the transmitter output sends electromagnetic wave signals into the transmitting branch, which then transmits the signals to the radar feed. The electromagnetic waves are then emitted from the radar feed signal end, entering the reflector cavity through the reflector. After reflection at the reflective layer on the inner wall of the reflector cavity, the waves are emitted again through the reflector and re-enter the radar feed signal end. These reflected electromagnetic waves are transmitted from the radar feed to the receiver input via the receiving branch, and then from the receiver output to the downstream measuring device for power measurement of the electromagnetic wave signals fed back from the radar feed. After the power of the electromagnetic wave signal is measured, the power of the electromagnetic wave signal measured at the receiver output is compared with the initial power of the electromagnetic wave signal emitted by the transmitter, and then subtracted. This yields the loss of the electromagnetic wave signal during transmission through the entire transceiver branch, thus completing the detection of the transceiver branch loss for weather radar. Because a feed shield installed at the radar feed is used as a reflection terminal device for the electromagnetic wave signal, the signal is completely reflected at the feed shield before being transmitted to the receiver via the receiving branch. This eliminates the need for frequent disassembly and reassembly of related branches and components during the weather radar transceiver branch loss detection process, significantly reducing the operation time required for the detection and greatly improving the overall operational efficiency. The entire process of detecting the transceiver branch loss for weather radar is smooth and efficient, the related components operate stably, and the detection data is accurate and reliable, thereby optimizing the detection effect of the weather radar signal. Based on this, the assembly and connection of each functional component and device are relatively constant, eliminating the need for frequent disassembly and assembly, and effectively avoiding the problem of component damage caused by frequent disassembly and assembly. As a result, the maintenance difficulty of related components and devices is reduced accordingly, and the overall equipment operating cost of the S-band weather radar transceiver branch loss detection system is also reduced accordingly.

[0051] This invention also provides an S-band weather radar transceiver loss detection system, whose feed shield can be matched with the radar feed, thereby making the detection process of S-band weather radar transceiver loss simpler, easier, more accurate and efficient, and effectively avoiding frequent disassembly and assembly of components in the detection system, thus ensuring the stable operation of each component, improving the overall reliability of the system equipment, and correspondingly reducing the overall operating cost and maintenance difficulty of the equipment.

[0052] The foregoing has provided a detailed description of the feed shield and the S-band weather radar transceiver branch loss detection system using the feed shield. Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the embodiments above are merely for the purpose of helping to understand the method and core ideas of this invention. It should be noted that those skilled in the art can make various improvements and modifications to this invention without departing from its principles, and these improvements and modifications also fall within the protection scope of the claims of this invention.

Claims

1. A feed shield, characterized in that, It includes a cover with an internal reflective cavity, the inner wall of which is provided with a reflective layer capable of reflecting electromagnetic waves; The mounting end of the cover has a reflective port for electromagnetic waves to pass through. The reflective port is connected to the reflective cavity. The cover is mounted on the radar feed source, and the reflective port is aligned and adapted to the signal end of the radar feed source.

2. The feed shield as described in claim 1, characterized in that, It also includes an installation component, through which the cover is detachably connected to the radar feed.

3. The feed shield as described in claim 2, characterized in that, The outer edge of the reflector is provided with an annular end plate. The mounting assembly includes a pressure strip and bolts. The pressure strip, the annular end plate, and the radar feed are arranged sequentially along the axial direction of the reflector and assembled by bolts so that the annular end plate is clamped and embedded between the pressure strip and the radar feed.

4. The feed shield as described in claim 3, characterized in that, The pressure strip is an arc-shaped component that is coaxially arranged with the annular end plate and fitted appropriately.

5. The feed shield as described in claim 4, characterized in that, The number of pressure strips is at least two, and each pressure strip is arranged sequentially along the circumference of the annular end plate and connected end to end.

6. The feed shield as described in claim 1, characterized in that, The reflective layer is a silver-plated layer.

7. The feed shield as described in claim 1, characterized in that, The cover is made of aluminum.

8. A transceiver loss detection system for an S-band weather radar, comprising a transmitter, a receiver, and a radar feed, and further comprising a measuring device connected to the output of the receiver, characterized in that, The transmitter and the radar feed are connected by a transmission branch, and the radar feed and the receiver are connected by a receiving branch. The radar feed is provided with a feed shield, which is the feed shield as described in any one of claims 1 to 7.

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