Calibration auxiliary device applied to millimeter wave ceilometer

Abstract

The utility model provides a calibration auxiliary device applied to a millimeter wave ceilometer, and the device comprises an upper pedestal which is fixed at the bottom of the millimeter wave ceilometer; the lower base is supported on the ground and is rotationally connected with the upper base; the sliding rail is fixed on the upper surface of the lower base; the sliding block is arranged in the sliding rail and is in sliding connection with the sliding rail; one end of the supporting rod is hinged to the bottom surface of the upper base, and the other end is hinged to the sliding block; the screw is arranged in the sliding rail, one end of the screw is rotationally connected with the sliding rail, and the screw penetrates through the sliding block and is in threaded connection with the sliding block; one end of the universal joint is fixedly connected with the end part of the screw rod; and the handle is detachably connected to the other end of the universal joint. According to the technical scheme, by inclining the angle of the millimeter wave ceilometer, on one hand, the length of the rope between the unmanned aerial vehicle and the metal ball can be reduced, and because the unmanned aerial vehicle is located outside the beam irradiation range, interference sources are reduced, and the test precision is improved; meanwhile, the accuracy of position control of the metal ball is greatly improved, and the testing efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of meteorological instrument measurement, and particularly relates to a calibration auxiliary device applied to a millimeter wave cloud detector. BACKGROUND

[0002] The millimeter wave cloud detector adopts a vertical opposition observation mode to continuously detect vertical profiles of various non-precipitation clouds and weak precipitation in a vertical direction. When the millimeter wave cloud detector is calibrated, a metal ball is used to simulate the reflection characteristics of a cloud layer for calibration. The specific process includes vertically suspending the metal ball above the millimeter wave cloud detector by using a drone, collecting the reflection signal of the metal ball by the millimeter wave cloud detector, and comparing the reflection signal with a theoretical value to obtain a calibration coefficient and perform correction, so as to ensure the measurement accuracy of the millimeter wave cloud detector. However, the calibration method of vertically suspending the metal ball by using the drone has obvious defects.

[0003] Firstly, the distance between the metal ball and the millimeter wave cloud detector needs to meet the far-field test condition. Under conventional conditions, when the millimeter wave cloud detector is vertically observed, the drone needs to carry the metal ball to a very high position, which puts forward higher requirements for the performance of the drone. Secondly, in order to avoid the influence of the scattering of the drone itself on the test results, the connecting rope between the drone and the metal ball needs to be greater than or equal to three times the spatial resolution of the millimeter wave cloud detector, which leads to a long rope for connection. In this case, the swing range of the metal ball in the air will increase due to the influence of the environmental wind, and the metal ball is easy to swing out of the beam irradiation range of the millimeter wave cloud detector during the test, which leads to the failure to measure the correct echo data and further reduces the calibration accuracy. Therefore, how to reduce the flight height of the drone, avoid the scattering echo of the drone body, and reduce the influence of the environmental wind on the calibration of the metal ball are the problems that need to be considered at present.

[0004] Therefore, the present application provides a device for assisting the millimeter wave cloud detector to tilt. CONTENT OF THE PRESENT APPLICATION

[0005] In view of the problems existing in the prior art, the present application provides a calibration auxiliary device applied to a millimeter wave cloud detector, which comprises an upper base fixed to the bottom of the millimeter wave cloud detector, a lower base supported on the ground and rotationally connected with the upper base, a sliding rail fixed to the upper surface of the lower base, a sliding block arranged in the sliding rail and slidably connected with the sliding rail along the length direction of the sliding rail, a supporting rod having one end hingedly connected with the bottom surface of the upper base and the other end hingedly connected with the sliding block, a screw rod arranged in the sliding rail, one end of which is rotationally connected with the sliding rail around the center thereof, the screw rod penetrating through the sliding block and being threadedly connected with the sliding block, a universal joint having one end fixedly connected with the end of the screw rod, and a handle detachably connected with the other end of the universal joint. By means of the above technical features, the millimeter wave cloud detector can be switched between the calibration state and the working state. When the millimeter wave cloud detector is calibrated, the handle is inserted into the universal joint, the screw rod is driven to rotate, the sliding block is driven to slide in the sliding rail, and the upper base is driven to rotate relative to the lower base through the supporting rod, so that the millimeter wave cloud detector is rotated.

[0006] When the millimeter wave cloud detector is calibrated, the millimeter wave cloud detector is tilted by the driver at a certain angle. On the one hand, the flight height of the unmanned aerial vehicle can be reduced, and on the other hand, the length of the rope between the unmanned aerial vehicle and the metal ball can be reduced. Therefore, the length of the rope can meet the requirement that the unmanned aerial vehicle is located outside the beam irradiation range of the millimeter wave cloud detector. Moreover, since the unmanned aerial vehicle is located outside the beam irradiation range, the interference source is reduced, and the test accuracy is improved. Furthermore, the reduction of the flight height and the length of the rope also improves the controllability of the unmanned aerial vehicle on the metal ball, greatly improves the accuracy of the position control of the metal ball, and improves the test efficiency.

[0007] In some embodiments, the device further comprises a rotating platform fixed to the ground, and a thrust bearing having one end fixed to the rotating platform and the other end fixed to the bottom of the lower base. Thus, the orientation of the millimeter wave cloud detector can be conveniently controlled, and the efficiency of the position adjustment of the millimeter wave cloud detector is improved.

[0008] In some embodiments, a plurality of supporting beads are embedded around the thrust bearing on the bottom surface of the lower base, and the supporting beads abut against the upper surface of the rotating platform. Thus, the contact area between the lower base and the rotating platform is increased, the supporting pressure of the thrust bearing is shared, and the service life of the thrust bearing is guaranteed.

[0009] In some embodiments, a clamping buckle of a clamping universal joint is fixed to the side of the millimeter wave cloud detector. Thus, the end of the universal joint is accommodated, the end of the universal joint is protected, and the space occupied by the universal joint is reduced.

[0010] In some embodiments, the upper base is fixed with a plurality of surrounding arms in the direction of the lower base around the support structure. Thus, the surrounding arms play a role of protection and dustproofing for the support structure when the millimeter wave cloud detector is in working state, thereby ensuring the normal operation of the sliding block and the threaded connection of the screw.

[0011] In some embodiments, the lower surface of the surrounding arm is provided with a brush in the direction of the lower base and is closely arranged along the length direction of the surrounding arm. Thus, the height of the surrounding arm can meet the hinge rotation between the upper base and the lower base, and the brush can flexibly shield the remaining space between the surrounding arm and the lower base, which can not only play a dustproofing effect, but also meet the hinge rotation between the upper base and the lower base.

[0012] In some embodiments, the handle comprises a plug-in part and a rotating part fixed at one end of the plug-in part. Thus, the universal joint can be efficiently driven to rotate, thereby driving the screw to rotate and further driving the sliding block to displace.

[0013] In some embodiments, the rotating part is an S-shaped rod. Thus, the S-shaped rod improves the rotation efficiency of the handle, making the rotation of the operator more labor-saving.

[0014] It should be understood that the content described in the content part of the utility model is not intended to limit the key or important features of the embodiments of the present disclosure, nor to limit the scope of the present disclosure. Other features of the present disclosure will become apparent through the following description. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 Fig. 1 shows a working state schematic diagram of a calibration auxiliary device for a millimeter wave cloud detector according to an embodiment of the present utility model;

[0016] Figure 2 Fig. 2 shows a support structure schematic diagram in a calibration auxiliary device for a millimeter wave cloud detector according to an embodiment of the present utility model;

[0017] Figure 3 Fig. 3 shows a handle structure schematic diagram in a calibration auxiliary device for a millimeter wave cloud detector according to an embodiment of the present utility model;

[0018] Figure 4 Fig. 4 shows a working state schematic diagram of a millimeter wave cloud detector according to an embodiment of the present utility model;

[0019] Figure 5 Fig. 5 shows a bottom structure schematic diagram in a calibration auxiliary device for a millimeter wave cloud detector according to an embodiment of the present utility model.

[0020] SYMBOL DESCRIPTION

[0021] 1. Millimeter-wave cloud measuring instrument; 11. Buckle; 2. Upper base; 3. Lower base; 31. Slide rail; 32. Slider; 33. Screw; 34. Support rod; 35. Universal joint; 4. Rotating platform; 5. Handle; 51. Plug-in part; 52. Rotating part; 61. Arm; 62. Sweeping brush; 71. Thrust bearing; 72. Support ball. Detailed Implementation

[0022] The preferred embodiments (or implementation methods) of the utility model will now be described in detail with reference to the accompanying drawings.

[0023] The following is for reference. Figures 1-5 This invention describes a calibration auxiliary device for a millimeter-wave cloud measuring instrument 1.

[0024] Figure 1 This diagram illustrates the working state of a calibration auxiliary device applied to a millimeter-wave cloud measuring instrument 1, according to an embodiment of the present invention. (Reference) Figure 1 As shown in the figure, the calibration auxiliary device provided in this embodiment is fixed to the bottom of the millimeter-wave cloud measuring instrument 1. It includes an upper base 2 located at the bottom of the millimeter-wave cloud measuring instrument 1, a lower base 3 hinged to the upper base 2, and a rotating platform 4 connected to the bottom of the lower base 3 and fixed to the ground. A support structure is provided between the upper base 2 and the lower base 3 to adjust the rotation angle between the upper base 2 and the lower base 3, thereby adjusting the tilt angle of the millimeter-wave cloud measuring instrument 1.

[0025] Figure 2 A schematic diagram of a support structure in a calibration auxiliary device for a millimeter-wave cloud measuring instrument 1, according to an embodiment of the present invention, is shown. (See reference) Figure 2 As shown, the support structure between the upper base 2 and the lower base 3 includes a slide rail 31 fixed to the upper surface of the lower base 3. The length direction of the slide rail 31 is perpendicular to the hinge axis between the upper base 2 and the lower base 3. A slider 32 is provided inside the slide rail 31, and the slider 32 slides along the length direction of the slide rail 31. A screw 33 is also provided inside the slide rail 31. One end of the screw 33 is rotatably connected to the end of the slide rail 31, and the screw 33 is arranged along the length direction of the slide rail 31, so that the screw 33 passes through the slider 32 and is threadedly connected to the slider 32. The other end of the screw 33 passes through the slide rail 31. The slider 32 reciprocates within the slide rail 31 by rotating the screw 33. A support rod 34 is provided on the top of the slider 32. One end of the support rod 34 is hinged to the slider 32, and the other end of the support rod 34 is hinged to the bottom surface of the upper base 2. This allows the slider 32 to move and open and close the hinge between the upper base 2 and the lower base 3 through the support rod 34.

[0026] The end of the screw rod 33 is also provided with a universal joint 35, which can be a double-joint universal joint 35 or a triple-joint universal joint 35, one end of the universal joint 35 is coaxially fixed to the end of the screw rod 33, and the other end extends to the outside of the lower base 3, so as to be inserted with the handle 5, thereby driving the rotation of the universal joint 35.

[0027] Figure 3 A handle 5 structure schematic view applied to the calibration auxiliary device of the millimeter wave cloud meter 1 is shown in the embodiment of the utility model. Figure 3 As shown in the figure, the handle 5 comprises an insertion part 51 and a rotating part 52 connected to one end of the insertion part 51. The insertion part 51 is a straight rod, and the end thereof is provided with a pin body for being inserted with the end of the universal joint 35. The rotating part 52 is an S-shaped rod body, and one end thereof is fixed to one end of the insertion part 51. When the handle 5 is in operation, the pin body at the end of the insertion part 51 is inserted into the pin hole at the end of the universal joint 35, and then the rod body of the rotating part 52 is held by both hands to rotate around the center of the rotating part 52, thereby driving the insertion part 51 to rotate, and further driving the screw rod 33 to rotate, and supporting the support rod 34 on the bottom of the upper base 2 through the displacement of the sliding block 32, so as to realize the angle adjustment between the upper base 2 and the lower base 3. Since the space occupation is large during the operation of the handle 5, the universal joint 35 is used in cooperation, so as to avoid the main structure of the millimeter wave cloud meter 1, which not only improves the convenience of operation, but also avoids the mutual interference with the millimeter wave cloud meter 1 during the operation process.

[0028] Figure 4 A working state schematic view of the millimeter wave cloud meter 1 is shown in the embodiment of the utility model. Figure 4 As shown in the figure, when the millimeter wave cloud meter 1 is in operation, it is in a vertical state, and the upper base 2 and the lower base 3 are parallel to each other. A plurality of surrounding arms 61 are arranged around the support structure between the upper base 2 and the lower base 3. One side of the surrounding arm 61 is fixed to the bottom surface of the upper base 2, and the other side extends to the upper base 2, so that the height of the surrounding arm 61 can satisfy the hinged rotation between the upper base 2 and the lower base 3. Since the millimeter wave cloud meter 1 is arranged in an outdoor area, the surrounding arm 61 is shielded on the side of the support structure, which plays a shielding and protecting role, and it is also not easy to cause large-sized garbage to enter the support structure, thereby affecting the normal rotation of the screw rod 33 and the sliding block 32.

[0029] A plurality of sweeping brushes 62 are arranged on the bottom surface of the surrounding arm 61 along the length direction of the surrounding arm 61. Adjacent sweeping brushes 62 are closely arranged, and the length of the sweeping brush 62 satisfies the mutual abutment of the end and the surface of the lower base 3, which not only can shield the space between the upper base 2 and the lower base 3, but also can guarantee the hinged rotation between the upper base 2 and the lower base 3.

[0030] Moreover, the millimeter wave cloud detector 1 is provided with a buckle 11 on the side, the buckle 11 is located directly above the universal joint 35, so that when the upper base 2 and the lower base 3 are in parallel state, the movable end of the universal joint 35 on one side can be clamped in the buckle 11, the storage of the movable end of the universal joint 35 on one side is realized, and the service life of the universal joint 35 is guaranteed.

[0031] Figure 5 The embodiment of the utility model shows a bottom structure schematic view applied to the calibration auxiliary device of millimeter wave cloud detector 1. Figure 5 As shown, the rotating platform 4 is provided with a fixed area connected with the ground, a thrust bearing 71 is fixed in the middle, and the top of the thrust bearing 71 is fixed to the bottom of the upper base 2, so that the mutual rotation of the lower base 3 and the rotating platform 4 is realized.

[0032] In order to improve the stable support between the lower base 3 and the rotating platform 4, a plurality of support beads 72 are embedded around the side of the thrust bearing of the lower base 3, the other side of the support bead 72 abuts against the upper surface of the rotating platform 4, so that the support area of the lower base 3 and the rotating platform 4 is increased, the support pressure of the thrust bearing is shared, and the stability of the rotation of the lower base 3 and the rotating platform 4 is improved.

[0033] The following is the calibration method of the millimeter wave cloud detector 1, mainly including the following steps:

[0034] S1: install the calibration device and determine the inclination parameter. According to the installation area environment of the millimeter wave cloud detector 1, the specific coordinates of the millimeter wave cloud detector 1 body, the inclination direction and angle are determined. Then the calibration auxiliary device is fixed to the bottom of the millimeter wave cloud detector 1 according to the above-mentioned connection relationship, the rotating platform 4 is fixed to the ground, and the inclination angle α of the millimeter wave is adjusted.

[0035] S2: calculate the flight parameter. According to the inclination direction and angle of the millimeter wave cloud detector 1, the lifting position and height of the metal ball are calculated. The fixed position of the millimeter wave cloud detector 1 body is determined, the longitude and latitude parameters (x, y) are determined, the diameter of the metal ball is determined, and the length of the rope between the unmanned aerial vehicle and the metal ball is determined. The projection ray of the electromagnetic beam of the millimeter wave cloud detector 1 in the horizontal direction is obtained by point-slope principle, and the longitude and latitude range and height where the metal ball finally locates are determined.

[0036] Among them, the metal ball is a commonly used high reflectivity target, usually made of stainless steel and other metals, has a smooth surface and regular spherical geometry and has a hole for easy penetration of the rope. The metal ball can strongly reflect the electromagnetic wave emitted by the millimeter wave cloud detector 1, producing clear and stable echo signals.

[0037] The metal ball is hung by the unmanned aerial vehicle, the unmanned aerial vehicle has the ability to bear the weight of the metal ball and the rope, can carry the metal ball to rise to a height greater than the height satisfying the far-field test condition and hover for a period of time, so the unmanned aerial vehicle needs to have a service life greater than one hour. At the same time, the unmanned aerial vehicle needs to have a positioning system and an altitude detection function, and can return the latitude, longitude and altitude data in real time and automatically locate according to the set latitude, longitude and altitude.

[0038] Since the latitude and longitude range where the metal ball finally stays is known, the length of the rope connected to the unmanned aerial vehicle and the metal ball can be adjusted, so that when the unmanned aerial vehicle hangs the metal ball, the height of the unmanned aerial vehicle is located outside the beam irradiation range of the millimeter wave cloud measuring instrument 1, so as to avoid the influence of the unmanned aerial vehicle itself scattering on the received signal of the millimeter wave cloud measuring instrument 1, and cause the final data interference.

[0039] S3: Perform calibration operation. According to the proposed data, the unmanned aerial vehicle, the rope and the metal ball are fixed to each other, the millimeter wave cloud measuring instrument 1 is started to work, and the echo signal is received and displayed in real time at the terminal of the millimeter wave cloud measuring instrument 1. Start the unmanned aerial vehicle, make the unmanned aerial vehicle fly to the proposed latitude and longitude parameters, and ensure that the metal ball is hung in the preset area. Adjust the position of the metal ball by controlling the unmanned aerial vehicle until the echo signal is maximum, and record the position information of the unmanned aerial vehicle.

[0040] S4: Analyze the calibration result. According to the position information of the unmanned aerial vehicle, the length of the rope and the inclination angle of the millimeter wave cloud measuring instrument 1, calculate the straight-line distance between the metal ball and the millimeter wave cloud measuring instrument 1, analyze the difference between the theoretical echo and the measured echo based on the parameter information of the millimeter wave cloud measuring instrument 1 and the metal ball, and determine the calibration coefficient of the millimeter wave cloud measuring instrument 1.

[0041] Due to the inclination of the millimeter wave cloud measuring instrument 1, compared with the traditional calibration method, the flight height of the unmanned aerial vehicle is greatly reduced, and the length of the rope connecting the unmanned aerial vehicle and the metal ball is reduced. Further, the shortening of the rope length indirectly improves the controllability of the fine adjustment of the metal ball by the unmanned aerial vehicle, reduces the action range of the environment wind on the rope, and improves the stability and accuracy of the test.

[0042] In the description of the present application, the terms "connection", "installation", "fixation" and the like should be understood in a broad sense, for example, "connection" can be fixed connection, can also be detachable connection, or integral connection; can be directly connected, or indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0043] The above is only the preferred embodiment of the present application and is not used to limit the present application. For those skilled in the art, the present application can have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A calibration aid for a millimeter wave cloud height finder, characterized in that The utility model relates to a kind of calibration auxiliary devices applied to millimeter wave cloud detector, including: Upper base (2), fixed to the bottom of the millimeter wave cloud detector (1); Lower base (3) is supported on the ground and is rotatably connected with the upper base (2); Slide rail (31) is fixed to the upper surface of the lower base (3); Sliding block (32) is arranged in the slide rail (31), and is slidably connected with the slide rail (31) along the length direction of the slide rail (31); Supporting rod (34) is hingedly connected with the bottom surface of the upper base (2) at one end, and is hingedly connected with the sliding block (32) at the other end; Screw rod (33) is arranged in the slide rail (31), one end is rotatably connected with the slide rail (31) around its own center, passes through the sliding block (32) and is threadedly connected with the sliding block (32); Universal joint (35) is fixedly connected with the end of the screw rod (33) at one end; Handle (5) is detachably connected to the other end of the universal joint (35).

2. The calibration aid for a millimeter-wave cloud sensor according to claim 1, characterized in that Further comprising: Rotary platform (4) is fixed to the ground; Thrust bearing (71) is fixed to the rotary platform (4) at one end, and is fixed to the bottom of the lower base (3) at the other end.

3. The calibration aid for a millimeter-wave cloud sensor according to claim 2, characterized in that A plurality of support beads (72) are embedded around the thrust bearing (71) on the bottom surface of the lower base (3), and the support beads (72) abut against the upper surface of the rotary platform (4).

4. The calibration aid for a millimeter-wave cloud sensor according to claim 1, characterized in that The millimeter wave cloud detector (1) is fixed with a buckle (11) of a clamping universal joint (35) on the side.

5. The calibration aid for a millimeter-wave cloud sensor according to claim 1, characterized in that A plurality of surrounding arms (61) are fixed around the support structure on the upper base (2) in the direction of the lower base (3).

6. The calibration auxiliary device applied to millimeter wave cloud detector according to claim 5, wherein: The lower surface of the surrounding arm (61) is provided with a sweeper (62) extending in the direction of the lower base (3), and the sweeper (62) is closely arranged along the length direction of the surrounding arm (61).

7. The calibration aid for a millimeter-wave cloud sensor according to claim 1, characterized in that The handle (5) includes a plug-in part (51) and a rotating part (52) fixed at one end of the plug-in part (51).

8. The calibration aid for a millimeter-wave cloud sensor according to claim 7, characterized in that The rotating part (52) is an S-shaped rod.

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