CN113050093A - Meteorological radar transceiver tester and meteorological radar transceiver testing method - Google Patents
Meteorological radar transceiver tester and meteorological radar transceiver testing method Download PDFInfo
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- CN113050093A CN113050093A CN202110320028.3A CN202110320028A CN113050093A CN 113050093 A CN113050093 A CN 113050093A CN 202110320028 A CN202110320028 A CN 202110320028A CN 113050093 A CN113050093 A CN 113050093A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
- G01S13/88—Radar or analogous systems specially adapted for specific applications
- G01S13/95—Radar or analogous systems specially adapted for specific applications for meteorological use
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
- G01S7/40—Means for monitoring or calibrating
- G01S7/4004—Means for monitoring or calibrating of parts of a radar system
- G01S7/4008—Means for monitoring or calibrating of parts of a radar system of transmitters
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
- G01S7/40—Means for monitoring or calibrating
- G01S7/4004—Means for monitoring or calibrating of parts of a radar system
- G01S7/4021—Means for monitoring or calibrating of parts of a radar system of receivers
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
- G01S7/40—Means for monitoring or calibrating
- G01S7/4052—Means for monitoring or calibrating by simulation of echoes
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A90/00—Technologies having an indirect contribution to adaptation to climate change
- Y02A90/10—Information and communication technologies [ICT] supporting adaptation to climate change, e.g. for weather forecasting or climate simulation
Abstract
The invention discloses a weather radar transceiver tester, wherein a bolt is fixedly connected to the bottom surface of a workbench close to the edge, and a ┙ -shaped locking rod is coaxially and threadedly inserted into the free end of the bottom of the bolt; the mounting part comprises an upper supporting part and a lower supporting part which are fixedly connected with each other, the lower supporting part comprises a supporting rod, a sliding column and a plurality of machine seat plates, and the sliding column is vertically and slidably connected in the supporting rod; the machine seat plates are provided with grooves along the length direction on the surface of one side of the center of the supporting rod, the top ends of all the machine seat plates are hinged on the outer edge of the bottom end of the supporting rod, and all the machine seat plates are arranged on the supporting rod in an annular array; the sliding part comprises a sliding column and a plurality of connecting rods the number of which is consistent with that of the machine seat plate, and the bottom end of each connecting rod is fixedly connected with a steel ball which is in sliding fit with the groove. The invention is convenient to carry and install when in use, has good maneuvering flexibility, low failure rate and good reliability.
Description
Technical Field
The invention relates to the field of meteorological radar target simulation, in particular to a meteorological radar transceiver tester and a meteorological radar transceiver testing method.
Background
The weather radar target simulator is a special test instrument developed aiming at a weather radar transceiver. The method can accurately measure the output power, frequency, PRF signals and the like of the transmitter, and can generate echo signals, intermediate frequency signals and the like required by the test of the receiver. The existing meteorological radar target simulator has the following problems that the principle is basically consistent from the system architecture, the architecture has certain difference, and the difference is relatively small in performance: the adopted mechanical modulation mechanisms have high failure rate, insufficient ADC/DAC digital-to-analog conversion precision and poor reliability. In use, due to the fact that the prior art mostly uses a system architecture and program control as objects to improve performance, the problem that whether the use convenience is excellent or not is ignored when a user directly inputs analog signals by detecting corresponding parameters on the spot in various environments, particularly outdoor field surveying, so that when the conventional meteorological radar target simulator is used, a special desk is inevitably needed to support and place the meteorological radar target simulator, and therefore operation of workers and real-time observation and detection are facilitated. At present, the simulation tests are convenient to use in indoor fixed table tops or places with tables, but when a special support or a table is not provided, the simulation tests can only be manually lifted, and the manual temporary lifting is very inconvenient, especially, the tests need more time, when the simulation frequency is higher, the simulation tests are more inconvenient, and when the outdoor random simulation tests are carried out on the spot, workers cannot always carry a table, so that how to design the existing weather radar target simulator more specialized and integrated and how to use the existing weather radar target simulator more conveniently are needed, and the technical personnel in the field are needed to solve the problem.
Disclosure of Invention
The invention aims to solve the problems of inconvenience in installation and use, insufficient maneuvering flexibility, high failure rate and low reliability in the prior art.
In order to achieve the purpose, the invention provides the following technical scheme:
the invention provides a weather radar transceiver tester, which comprises a simulator body for simulating weather, wherein the simulator body is fixedly connected to a workbench, a bolt vertical to the bottom surface of the workbench is fixedly connected to the edge of the bottom surface of the workbench, and a locking rod in the shape of ┙ is coaxially inserted into the free end of the bottom of the bolt in a threaded manner;
the working table is installed on the ground through an installation part, the installation part comprises an upper supporting part and a lower supporting part which are fixedly connected with each other, wherein
The upper supporting component is hinged with the bottom of the workbench and fixedly supports the workbench when the workbench is hinged and rotated to a horizontal position, and a rectangular flat hole for the locking rod to pass through is formed in the upper supporting component;
the lower support component comprises a support rod, a sliding column and a plurality of machine seat plates, and the sliding column is vertically and slidably connected in the support rod; the machine seat plates are provided with grooves along the length direction on the surface of one side of the center of the supporting rod, the top ends of all the machine seat plates are hinged on the outer edge of the bottom end of the supporting rod, and all the machine seat plates are arranged on the supporting rod in an annular array; the sliding part comprises a sliding column and a plurality of connecting rods, the number of the connecting rods is the same as that of the machine seat plate, the bottom end of each connecting rod is fixedly connected with a steel ball in sliding fit with the groove, the top ends of the connecting rods are converged and crossed and connected together and are connected to the end face of the bottom end of the sliding column, the side wall of the top of the sliding column is provided with a protruding part, and the protruding part is in sliding fit with a guide groove which is vertically arranged on the inner wall of the supporting rod; the top end of the sliding column is connected with a pull rope, and the free end of the pull rope penetrates through the side wall of the supporting rod in a sliding fit mode and then is connected with a batten.
Compared with the prior art, the invention has the following beneficial effects: the invention is structurally characterized in that a special supporting part is additionally arranged, the special supporting part is connected with the simulator into a whole through the workbench and integrated together, the simulator can be used at any time and any place, and the simulator can be conveniently and quickly used no matter whether proper supporting and placing conditions exist or not, and no matter whether indoor or outdoor field simulation exists or not. The lower support piece has a convenient and fast storage function, a flexible unfolding mode formed by the machine seat plate can be firmly erected on the ground, the support and the installation are convenient, the simulator body and the workbench can be hinged together to form an aggregate fixed on the rod piece, the size is reduced, and the carrying operation by a single person is convenient. From the system framework, the invention adopts more advanced digital testing means, improves the digital-to-analog conversion precision of the ADC/DAC, increases a digital instrument, improves the measurement precision and reliability of the target simulator and improves the use convenience of users in modes of modular design and the like by canceling a mechanical modulation mechanism with high failure rate.
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 some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic structural diagram of an embodiment of the present invention;
FIG. 2 is a schematic view of the table hinged to a position parallel to the screw;
FIG. 3 is a cross-sectional view A-A of FIG. 2;
FIG. 4 is a schematic view of a specific structure of an elastic telescopic rod;
FIG. 5 is an enlarged partial view of the lower support member;
FIG. 6 is a cross-sectional view of the seat plate
FIG. 7 is a schematic view of a wrapping attachment of the rigid pull cord;
FIG. 8 is a schematic structural diagram of another embodiment of the present invention;
FIG. 9 is a schematic view of the table of FIG. 8 about to be supported in position by the bed plate;
FIG. 10 is a system block diagram of a meteorological target simulator of the present invention;
FIG. 11 is a functional block diagram of a switching distribution circuit;
FIG. 12 is a functional block diagram of a power detection module.
The reference numerals are explained below: the simulator comprises a simulator body 1, a workbench 2, an embedded groove 201, a turning rod 3, an elastic telescopic rod 4, a socket rod 401, a sliding rod 402, a sliding pin 403, a pressure bearing spring 404, a pin hole 405, a screw rod 5, a spreading piece 6, a lantern ring 7, a threaded knob 8, a plug pin 9, a locking rod 10, a machine seat plate 11, a groove 12, a steel ball 13, a connecting rod 14, a sliding column 15, a bulge 16, a guide groove 17, a pull rope 18, a fixing screw 19, a roller 20, a handle 21, a batten 22 and a support rod 23.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the functions of the invention clearer and easier to understand, the technical scheme of the invention is described in detail below. It should be understood by those skilled in the art that the following examples are illustrative of some, but not all, specific embodiments of the invention and therefore the scope of the invention is not limited thereto.
The embodiment discloses a weather radar transceiver tester in detail, which mainly comprises a simulator body for simulating weather, in particular, referring to the structure shown in fig. 1, the simulator body 1 is fixedly connected to a workbench 2 in advance, and the simulator body and the workbench can be detachably fixed. Meanwhile, a plug pin 9 perpendicular to the bottom surface of the workbench 2 is fixedly connected to the edge of the bottom surface of the workbench 2, a ┙ -shaped locking rod 10 is coaxially inserted into the free end of the bottom of the plug pin 9 in a threaded manner, and an annular embedded groove 201 is further formed in the bottom surface of the workbench 2 close to the locking rod 10.
The workbench 2 of the embodiment is installed on the ground through an installation part, the installation part comprises an upper support part and a lower support part which are fixedly connected with each other, the upper support part is used for being hinged with the bottom of the workbench and fixedly supporting the workbench when the workbench is hinged and rotated to a horizontal position, and the upper support part is provided with a rectangular flat hole for the locking rod to pass through; particularly, go up the supporting part and can be a round bar, the top of round bar articulates there is the workstation, and the articulated shaft of the two is a bolt, and articulated position is the optical axis section of bolt, and it can to unscrew the bolt when needs articulate the rotation.
As for the lower supporting member in the present embodiment, as shown in fig. 5, it includes a supporting rod 23, a sliding column 15 and several machine seat plates 11, the sliding column 15 is vertically and slidably connected inside the supporting rod 23; the machine seat board 11 has been seted up slot 12 along its length direction on the surface towards bracing piece 23 center one side, and all machine seat boards 11's top all articulates on the bottom of bracing piece 23 is followed outward, and all machine seat boards 11 are the annular array and arrange on bracing piece 23. The sliding part comprises a sliding column 15 and a plurality of connecting rods 14 the number of which is the same as that of the seat board 11, the bottom end of each connecting rod 14 is fixedly connected with a steel ball which is in sliding fit with the groove 12, the top ends of the connecting rods are converged, crossed and connected together and connected to the end face of the bottom end of the sliding column 15, the side wall of the top of the sliding column 15 is provided with a protruding part 16, and the protruding part 16 is in sliding fit with a guide groove 17 which is vertically arranged on the inner wall of a supporting rod 23; the top end of the sliding column 15 is connected with a pull rope 18, and the free end of the pull rope 18 penetrates through the side wall of a support rod 23 in a sliding fit manner and then is connected with a ribbon board 22. In order to avoid the drawstring 18 from completely sinking into the support bar 23 during use.
Preferably, the upper supporting part may further refer to fig. 1-3 in addition to the foregoing structure, and specifically includes a screw rod 5, a thread bushing, a supporting part 6, a turning rod 3, and an elastic telescopic rod 4, where the supporting part 6 is in a l shape, a vertical section of the supporting part is fixedly connected to a top end of the screw rod 5, a free end of a horizontal section of the supporting part is hinged to a bottom surface of the worktable 2 and enables the worktable 2 to rotate in a vertical plane, the screw rod 5 is further provided with a rectangular flat hole, when the worktable 2 is hinged to be parallel to the screw rod 5, the lock rod 10 can be inserted into the flat hole, and a rod section where the free end of the lock rod 10 is located completely extends out of the flat hole. The opening piece 6 is of a truncated cone-shaped structure with the large end upward, is positioned above the threaded sleeve, and is in threaded sleeve connection with the threaded sleeve on the screw rod 5. The threaded sleeve comprises a threaded knob 8 and a sleeve ring 7, the threaded knob 8 is in threaded sleeve connection with the screw rod 5, the sleeve ring 7 is sleeved on the screw rod 5 in a clearance fit mode, and the top end of the threaded knob 8 coaxially extends into the bottom end face of the sleeve ring 7 and can freely rotate in the bottom end of the sleeve ring 7 so as to drive the sleeve ring 7 to move up and down. The top edge of the lantern ring 7 is articulated with a plurality of roots for annular array ground elasticity telescopic link 4 to make all elasticity telescopic link 4 encircle prop apart around 6, the free end of elasticity telescopic link 4 with the smooth contact of bottom surface of workstation 2, so that when upwards rotating thread knob 8, lantern ring 7 drives all elasticity telescopic link 4 and moves up and struts gradually because with the contact of propping apart the week side of 6, and struts the part can strut to the free end of elasticity telescopic link 4 slides in the position department of embedded groove 201, in order to play the effect that supports fixed workstation 2 (simulator body 1).
On the basis of the structure, the mounting support of the weather radar transceiver tester of the embodiment, namely the upper support part and the lower support part are connected into a whole through the fixed connection between the screw rod 5 and the support rod 23, so that the mounting support has the function of supporting and fixing and is convenient for operators to use the simulator.
Based on the specific embodiment of the weather radar transceiver tester, the invention also provides an installation and use method of the weather radar transceiver tester, which specifically comprises the following steps: when the simulator is used again after the storage is finished,
s1, firstly, the pull rope 18 is lifted upwards to enable the sliding column 15 to move upwards, then the steel balls 13 slide upwards in the groove 12 of the machine seat plate 11 along the length direction of the steel balls, all the machine seat plates 11 are gradually and synchronously unfolded, finally, when the sliding column 15 slides upwards to the limit, the machine seat plate 11 is unfolded to the limit, after the pull rope 18 exposed outside the supporting rod 23 is fixed, the machine seat plate 11 is in a stable unfolding state, and at the moment, the machine seat plate is erected on the ground, and stable supporting and placing can be achieved.
S2, the locking rod 10 is turned downward by 90 degrees, so that the locking rod 10 completely faces the opening of the flat hole on the screw 5, so that the locking rod 10 can pass through the flat hole.
S3, rotating the table 2 clockwise, for example, 90 degrees, temporarily holding the table 2 with hands, and rotating the simulator body 1 to a horizontal position.
S4, the threaded knob 8 is turned upwards to push the lantern ring 7 to move upwards, and then when all the elastic telescopic rods 4 are in contact with the conical surface of the spreading piece 6, the elastic telescopic rods gradually diverge outwards and scatter under the spreading action of the spreading piece 6, finally the free ends of the elastic telescopic rods 4 slide to the embedded groove 201 on the bottom surface of the workbench 2 to support the workbench 2, so that the vertical installation supporting action on the simulator body 1 is achieved, and the simulator is quickly supported and installed so that a worker can use the simulator at any time and any place.
S5, after the simulator is used, when the simulator is stored, the workbench 2 is held by hands, and then the threaded knob 8 is rotated reversely, so that all the elastic support rods 23 gradually move downwards and are folded.
S6, rotating the workbench 2 anticlockwise, and enabling the locking rod 10 to penetrate through the flat hole, wherein the rod section where the free end of the locking rod 10 is located is exposed out of the flat hole.
S7, rotating 90 degrees anticlockwise, and enabling the rod section where the free end of the locking rod 10 is located to be tightly pressed on the outer side of the screw rod 5, so that the workbench 2 is fixedly stored.
Of course, the steps S3 and S4 can be performed by reversing the length of the horizontal segment of the crank lever 3, for example, if the length of the horizontal segment of the crank lever 3 is long, the table 2 will not collide with the screw knob 8 when rotated to the vertical position, and the screw knob 8 can be moved downward without large displacement, and the table 2 can be stored and mounted; and if the screw knob 8 collides with the side surface of the screw knob 8, the screw knob 8 is preferably turned downward to a position below the bottom end of the vertically arranged worktable 2.
As a specific implementation detail, as shown in fig. 1, the cross section of the insertion groove 201 is in a right trapezoid shape, and the inclined surface thereof is disposed toward the side of the locking bar 10 so that the elastic telescopic bar 4 can slide in. Furthermore, a roller is mounted on the free end of the elastic telescopic rod 4, and the roller can be clamped into the embedded groove 201.
Specifically, as shown in fig. 4, the elastic telescopic rod 4 includes a socket rod 401 and a sliding rod 402, the socket rod 401 is hinged to the collar 7, one end of the sliding rod 402 is inserted into the insertion hole of the socket rod 401 in a sliding fit manner, and the other end is pushed out of the socket rod 401 by a pressure-bearing spring 404 installed in the insertion hole. For the very heavy workbench 2 and simulator, preferably, a sliding pin 403 is further vertically inserted and installed on the side surface of the sliding rod 402 near one end of the pressure spring 404, the sliding pin 403 is elastically and slidably connected with the sliding rod 402, so that when the sliding rod 402 extends to a predetermined length, the sliding pin 403 just pops into a pin hole 405 on the side wall of the socket rod 401 and the end part of the sliding pin is exposed out of the pin hole 405, so as to change the elastic telescopic rod 4 into a rigid rod, and the bearing capacity is stronger. When the elastic support bar 23 is stored, a part of the sliding pin 403 is pushed back into the insertion hole. Of course, a sliding pin 403 and a pin hole 405 may be further provided near the bottom of the insertion hole to achieve stable storage of the elastic telescopic rod 4 with a minimum size. In fact, when accomodating the completion, the vertical interval of direct adjustment strutting piece 6 and screw thread knob 8, let this interval be greater than 4 length of elasticity telescopic link can, elasticity telescopic link 4 can be the extension state, around screw rod 5 and accomodate with it being certain contained angle, this also can, and also very simple and convenient. Those skilled in the art can adaptively select a specific structure based on the concept of the present invention, and the present embodiment does not fully list all the specific modes.
As a specific implementation detail, when one end of the sliding pin 403 is exposed out of the pin hole 405, the free end of the sliding rod 402 slides into the embedded groove 201, so as to better realize the supporting and fixing.
In order to more accurately and conveniently realize the length fixation of the elastic telescopic rod 4, a guide groove 17 is arranged on the inner side wall of the jack of the socket rod 401 to be in sliding fit with the sliding pin 403.
In order to better accommodate and fix the simulator body 1, the surface of the screw rod 5 at one end of the flat hole, from which the locking rod 10 extends, is a rectangular plane, and the length direction of the screw rod is consistent with that of the flat hole, so that after the rod section at the free end of the locking rod 10 is exposed out of the flat hole, the rod section can rotate around the axis of the bolt 9 to the position close to the plane and is perpendicular to the length direction of the plane.
In a specific embodiment, the pulling rope 18 is an elastic rope, and the length of the elastic rope is such that when the sliding column 15 is pulled up to the extreme position, the pulling rope 18 is tied to expose one end of the supporting rod 23, and the strip plate 22 can be tightly attached to the cylindrical surface of the supporting rod 23. Of course, when the pulling rope 18 is a rigid rope, as shown in fig. 7, a handle 21 having a shape of a rectangle is fixed to the opening of the support rod 23 through which the pulling rope 18 passes, and two grooves for winding the pulling rope 18 are respectively formed on the upper and lower outer side surfaces of the handle 21. In order to facilitate pulling the pulling rope 18, a roller 20 for the pulling rope 18 to pass through is installed inside the supporting rod 23, and an orifice of the supporting rod 23 through which the pulling rope 18 passes is in a horn shape, and the large end of the supporting rod faces the outside.
In order to maintain the stable storage state of each seat plate 11 when storing it, as shown in fig. 5, a fixing screw 19 screwed from the outside is connected to the bottom end side wall of the support rod 23 in a screw-fit manner, and the end of the fixing screw 19 is screwed into the guide groove 17 and can press the boss 16 on the slide post 15 moved down to the limit position. Preferably, the portion of the fixing screw 19 extending into the guiding groove 17 is smoothly conical, so that the fixing screw 19 can be screwed easily to press the boss 16.
As a specific implementation detail, as shown in FIG. 6, the machine seat plate 11 has an arc cross section, and the groove 12 is provided at the center of the concave surface of the machine seat plate 11, which is very convenient for the steel balls 13 to slide into the groove 12 of the machine seat plate 11 adaptively.
Based on the above implementation structure, in fact, it can be seen that, in the present invention, the upper and lower supporting members may both be the upper supporting member, or both may be the lower supporting member, and those skilled in the art may implement the above implementation by only requiring adaptive design. Specifically, the method comprises the following steps: as shown in fig. 8-9, when both the lower support structures are used, i.e. the upper and lower support structures are arranged in a mirror symmetry manner, both support structures are replaced by the screw 5 structure without using the pull rope 18. That is: the screw 5 is a driving screw which is threaded in the two sliding columns 15 at the same time, the screw is mounted in a supporting rod 23 or a mounting pipe in a self-rotating manner around the axis of the screw, and the upper and lower threads of the screw are opposite to each other, so that the upper and lower sliding columns 15 are close to/away from each other under the rotation of the screw, and the two sets of machine seat plates 11 at the upper and lower ends are synchronously opened or closed. To the drive mode of lead screw, many structures of prior art can all be referred to, for example worm gear worm transmission, process one section worm at the lead screw middle part promptly, the turbine is installed on holding a bracing piece 23 or the installation pipe of sliding column 15, rotates the worm wheel and can realize adjusting. Or a rotating ring is directly arranged on the part of the screw rod exposed out of the support rod 23 or the mounting tube so as to manually rotate the screw rod. In the process that the workbench 2 rotates through the threads between the crank rod 3 and the screw rod, when the embedded groove 201 of the workbench 2 is rotated to be just matched with the free end of the machine seat plate 11, the locking rod 10 is also just positioned at the position where the workbench 2 can enter the flat hole after rotating downwards.
Of course, the skilled person can also adapt the design when using a pull cord 18 for both sliding columns 15, which is also one of the inventive concepts of the present invention.
And for the structures adopting the upper supporting part, when the structure is used for replacing the original lower supporting part, the crank rods 3 are removed. The rest can be designed and implemented adaptively by those skilled in the art, and are not described in detail.
For all the above embodiments, during the manufacturing, it is preferable that the elastic telescopic rod 4 is always kept in contact with the bottom of the workbench 2 during the expanding process of the elastic telescopic rod 4 when the workbench 2 is in the horizontal position.
On the other hand, in this embodiment, as shown in fig. 10, the system framework of the meteorological target detector mainly includes a main control module, a radio frequency baseband module, a local oscillator module, a power detection module, and a desktop test instrument shell, which are in communication connection with each other, the radio frequency baseband module has an FPGA front end control, and the main control module, the radio frequency baseband module, the local oscillator module, and the power detection module are all installed in the desktop test instrument shell in a centralized manner. In particular use:
the X-band signal sent by the radar transmitter is firstly coupled to a weather radar transceiver tester for testing by the coupler, and the rest signals are consumed by a high-power load.
After microwave signals enter the tester, the microwave signals enter the radio frequency baseband module through a microwave switching and distributing circuit module composed of an X-band circulator, a microwave switch and the like.
In order to obtain larger gain and reduce the risk of signal self-excitation, the radio frequency baseband module adopts a mode of 2-level up-conversion and 2-level down-conversion, wherein the first-level up-down conversion adopts a mode of 8G frequency mixing to modulate the X-band signal to 1.2G-1.7G, the second-level up-down conversion adopts a mode of 1-2G adjustable frequency mixing to modulate the signal to be near zero frequency or close to zero frequency, and the close frequency is preferably more than 95%. And the signals are transmitted to the FPGA after being converted by the 12-bit high-precision ADC. And the FPGA transmits the data information acquired by the ADC to the LINUX main control module through the Pdie high-speed bus, and the TTL/SPI bus is adopted to give an instruction of an operator to the FPGA in consideration of the real-time performance of human-computer interaction and the operation needing quick response. And finally, the main control module collects the information of the radio frequency baseband module, the power detection module and the programmable control panel, and displays all information and waveforms on the liquid crystal panel through an operation interface of the custom telephone.
In the above test principle, a specific switching distribution circuit is shown in fig. 11, and the adjustable local oscillator module in the test is placed nearby near the PLL phase-locked loop by using dual independent VTCXO to obtain better phase noise. The adjustable local oscillator module adopts a GPS/Beidou clock, and through FPGA clock discipline logic, the clock signals of the first local oscillator and the second local oscillator are accurately aligned in frequency and phase, so that the accuracy of the local oscillator is ensured to the maximum extent. And the two local oscillators adopt a voltage-controlled temperature compensation crystal oscillator to provide reference frequency, and adopt a 16BIT DAC to carry out voltage fine adjustment on the crystal oscillator so as to realize accurate control on the clock source frequency.
For a local oscillator performance indicator, ADF5355 from ADI is recommended for a local oscillator, which provides a 13600MHz clock signal. The two local oscillator acquisition and output working frequency ranges are as follows: 1 GHz-2 GHz, and the adjustable frequency step is 2.4 Hz.
In this embodiment, a radio frequency signal output by a transmitter of the radio frequency baseband module passes through the coupler, the attenuator, and the circulator, and then is mixed with a local oscillator in the radio frequency baseband module to modulate the signal to 1.2G to 1.7GHz, and then is conditioned by the low noise amplifier and the filter circuit. And (3) carrying out secondary mixing on the conditioned signal and a 1-2G adjustable secondary local oscillator, and modulating the signal to be near zero frequency, wherein the approach rate is preferably more than 95% if the signal is close to the zero frequency. Digital signal sampling is performed.
On the contrary, the host module sends the configuration information to the FPGA through the client setting of the test signal required by the receiver, the FPGA carries out relevant configuration on the DAC to generate baseband waveform, and the baseband waveform is amplified and output to the receiver after primary and secondary mixing.
As specific implementation details, the functions of the intermediate frequency signal and X-band signal generation module used are as follows: because the intermediate frequency signal needs to be linked with the receiving channel, and the intermediate frequency echo signal is modulated according to the signal generated by the radar transmitter, the multiplexing mode of an X-waveband transmitting channel and an intermediate frequency output channel is adopted. When the weather radar transceiver tester needs to generate an X-band echo signal, a local oscillator clock is 8G, and the X-band signal after frequency mixing is output through high-pass filtering. When the weather radar transceiver tester needs to generate an intermediate frequency echo signal, a local oscillator clock is 2G, and the intermediate frequency signal after frequency mixing is output through low-pass filtering. Therefore, the delay and the amplitude of the X-band echo signal and the intermediate-frequency echo signal in the embodiment are adjustable, and the index requirements are met.
The power detection module of the present embodiment is shown in fig. 12. In the invention, a lookup table compensation scheme is adopted, and particularly, a relatively accurate power compensation lookup table is formed by adopting an independent channel, directional coupling, a high-precision constant-temperature crystal oscillator and monitoring the real-time environment temperature.
For the temperature factor: the temperature has a large influence on the power loss of the coupler, the attenuator and the low-noise amplifier, and if the temperature factor coefficient is not considered, the power detection value has an error of more than 6%. Reference clock: the high-accuracy reference clock is the key of a measuring instrument, the precision of the clock directly influences the sampling precision of an ADC (analog to digital converter), and an oscilloscope and a frequency source both adopt expensive temperature compensation crystal oscillators so as to improve the sampling precision. The scheme adopts the latest GPS/Beidou dual-mode taming clock scheme, and the clock can be used as a metering level through the synchronization of the GPS/Beidou communication module and the satellite cesium atomic clock.
The power compensation lookup table can be designed based on the existing program control, automatic numerical acquisition and calibration software is adopted, the power loss of continuous change of 9.2-9.7 GHz is recorded in a curve mode at a fixed environment temperature, and the accuracy of power compensation is further improved compared with a binarization lookup table mode. The power detection module reserves a self-calibration function, and a user can carry out one-key power calibration by matching a calibration source with an internal calibration guide.
It should be noted that, in the present invention, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Therefore, it should be understood by those skilled in the art that any modification and equivalent replacement of the embodiments disclosed herein without departing from the technical spirit of the present invention shall be included in the scope of the present invention.
Claims (10)
1. The utility model provides a meteorological radar transceiver tester, includes the simulator body that is used for simulating meteorological weather which characterized in that: the simulator body is fixedly connected to the workbench, a bolt vertical to the bottom surface of the workbench is fixedly connected to the edge of the bottom surface of the workbench, and a ┙ -shaped locking rod is coaxially and threadedly inserted into the free end of the bottom of the bolt;
the working table is installed on the ground through an installation part, the installation part comprises an upper supporting part and a lower supporting part which are fixedly connected with each other, wherein
The upper supporting component is hinged with the bottom of the workbench and fixedly supports the workbench when the workbench is hinged and rotated to a horizontal position, and a rectangular flat hole for the locking rod to pass through is formed in the upper supporting component;
the lower support component comprises a support rod, a sliding column and a plurality of machine seat plates, and the sliding column is vertically and slidably connected in the support rod; the machine seat plates are provided with grooves along the length direction on the surface of one side of the center of the supporting rod, the top ends of all the machine seat plates are hinged on the outer edge of the bottom end of the supporting rod, and all the machine seat plates are arranged on the supporting rod in an annular array; the sliding part comprises a sliding column and a plurality of connecting rods, the number of the connecting rods is the same as that of the machine seat plate, the bottom end of each connecting rod is fixedly connected with a steel ball in sliding fit with the groove, the top ends of the connecting rods are converged and crossed and connected together and are connected to the end face of the bottom end of the sliding column, the side wall of the top of the sliding column is provided with a protruding part, and the protruding part is in sliding fit with a guide groove which is vertically arranged on the inner wall of the supporting rod; the top end of the sliding column is connected with a pull rope, and the free end of the pull rope penetrates through the side wall of the supporting rod in a sliding fit mode and then is connected with a batten.
2. The weather radar transceiver tester as claimed in claim 1, wherein: the stay cord is an elastic cord, the length of the stay cord enables the stay cord to be tied to expose one end of the support rod, and the batten can be tightly attached to the cylindrical surface of the support rod when the sliding column is pulled up to the limit position.
3. The weather radar transceiver tester as claimed in claim 1, wherein: when the pull rope is a rigid rope, a C-shaped handle is fixedly connected to the opening of the support rod through which the pull rope penetrates, and grooves for winding the pull rope are respectively formed in the upper outer side surface and the lower outer side surface of the handle.
4. The weather radar transceiver tester as claimed in claim 1, wherein: the bracing piece internally mounted has the gyro wheel that supplies the stay cord to walk around, the drill way that the bracing piece supplied the stay cord to wear out is loudspeaker form, and the main aspects outwards.
5. The weather radar transceiver tester as claimed in claim 1, wherein: and a fixing screw screwed in from the outside is connected to the side wall of the bottom end of the supporting rod in a threaded fit manner, and the end part of the fixing screw is screwed in the guide groove and can press the convex part on the sliding column moving downwards to the limit position.
6. The weather radar transceiver tester as claimed in claim 5, wherein: the part of the fixing screw extending into the guide groove is smooth and conical.
7. The weather radar transceiver tester as claimed in claim 1, wherein: the cross section of the machine seat plate is arc-shaped, and the groove is arranged at the center of the concave surface of the machine seat plate.
8. The weather radar transceiver tester as claimed in any one of claims 1 to 7, wherein: the device comprises a main control module, a radio frequency baseband module, a local oscillator module and a power detection module which are in communication connection with each other, wherein the radio frequency baseband module is provided with FPGA front end control, and the main control module, the radio frequency baseband module, the local oscillator module and the power detection module are all installed in a desktop type test instrument shell in a centralized mode.
9. A method for testing a weather radar transceiver, characterized in that the weather radar transceiver tester as claimed in claim 8 is used for testing, and the steps of testing are as follows:
t1, coupling a part of microwave signals to a weather radar transceiver tester for testing by an X wave band signal sent by a radar transmitter through a coupler, and consuming the rest signals by a high-power load;
t2, microwave signal enters the tester, through the microwave switching and distributing circuit module composed of the X wave band circulator and the microwave switch, enters the radio frequency baseband module;
t3, the radio frequency baseband module adopts a 2-level up-conversion and 2-level down-conversion mode, the first-level up-down conversion adopts an 8G frequency mixing mode to modulate an X wave band signal to 1.2G-1.7G, the second-level up-down conversion adopts a 1-2G adjustable frequency mixing mode to modulate the signal to be close to zero frequency, and the signal is transmitted to the FPGA after 12-bit high-precision ADC conversion;
t4, the FPGA transmits data information acquired by the ADC to the LINUX main control module through a Pdie high-speed bus, and a TTL/SPI bus is adopted to send an operator instruction to the FPGA when the operation needing quick response is involved in the human-computer interaction process;
and T5, the main control module collects the information of the radio frequency baseband module, the power detection module and the programmable control panel, and displays all the information and waveforms on the liquid crystal panel through an operation interface of the custom telephone.
10. The weather radar transceiver testing method according to claim 9,
for the radio frequency baseband module, the radio frequency signal output by the transmitter of the radio frequency baseband module is mixed with a local oscillator in the radio frequency baseband module after passing through the coupler, the attenuator and the circulator, the signal is modulated to 1.2G-1.7 GHz, and then the signal is conditioned through a low noise amplifier and a filter circuit; performing secondary frequency mixing on the conditioned signal and a 1-2G adjustable secondary local oscillator, modulating the signal to be close to zero frequency, and sampling a digital signal; the host module sends the configuration information to the FPGA through user setting, the FPGA configures the DAC to generate baseband waveform, and the baseband waveform is amplified and output to the receiver after primary and secondary mixing;
the method adopts a multiplexing mode of an X-band transmitting channel and an intermediate frequency output channel: when the weather radar transceiver tester needs to generate an X-band echo signal, a local oscillator clock is 8G, and the X-band signal after frequency mixing is subjected to high-pass filtering to output the signal; when the weather radar transceiver tester needs to generate an intermediate frequency echo signal, a local oscillator clock is 2G, and the intermediate frequency signal after frequency mixing is subjected to low-pass filtering to output the signal;
for the power detection module, an accurate power compensation lookup table is formed by adopting an independent channel, directional coupling, a high-precision constant-temperature crystal oscillator and monitoring of real-time environment temperature; and a GPS/Beidou dual-mode disciplined clock is adopted, and a GPS/Beidou communication module is used for synchronizing with a satellite cesium atomic clock.
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