A field radar level gauge calibration device

Abstract

This utility model discloses a field radar level gauge calibration device, relating to the field of radar level gauge calibration technology. It includes a base plate with a mounting plate on top. A laser rangefinder is fixedly connected to the top outer wall of the mounting plate, and a reflector plate for reflecting laser and high-frequency electromagnetic waves is also fixedly connected to the top outer wall of the base plate. A displacement assembly is provided on the top of the base plate to facilitate horizontal movement of the mounting plate. In this utility model, the measuring axes of the laser rangefinder and the radar level gauge are precisely perpendicular to the reflector plate. The laser rangefinder emits laser light, which is reflected by the reflector plate to obtain high-precision distance data. The radar level gauge simultaneously emits high-frequency electromagnetic waves for measurement. Because the two are set parallel and their axes are perpendicular to the reflector plate, the laser data and radar measurement results can be directly compared to calibrate the deviation of the radar level gauge. The high-precision reference of the laser significantly improves the calibration accuracy.

Description

Technical Field

[0001] This utility model relates to the field of radar level gauge calibration technology, and in particular to a device for on-site radar level gauge calibration. Background Technology

[0002] A radar level gauge is a level measurement instrument based on radar wave technology. It measures the level height by transmitting and receiving radar waves and has wide applications in many industries such as petroleum, chemical, and power. In actual use, due to environmental factors, component aging, and other reasons, the measurement accuracy of radar level gauges will gradually decrease, thus requiring regular calibration.

[0003] Currently, existing calibration devices suffer from the following technical problems: First, traditional calibration equipment often relies on bolts to fix the radar level gauge, which is cumbersome to install and prone to introducing angular deviations. This results in the electromagnetic wave emission axis not being perpendicular to the reflecting surface, generating false echo interference. For example, when the radar level gauge is mounted on an arched surface, it is difficult to achieve vertical calibration with a flat base, and indirect echoes will significantly affect measurement accuracy. Second, the calibration benchmark is singular; some devices use fixed-distance reflectors, which cannot flexibly adapt to different measurement range requirements, leading to insufficient accuracy in multi-point calibration. Therefore, there is an urgent need for a field radar level gauge calibration device to solve these problems. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a field radar level gauge calibration device. Its advantages are: the measuring axes of the laser rangefinder and the radar level gauge are precisely perpendicular to the reflector. The laser rangefinder emits laser light, which is reflected by the reflector to obtain high-precision distance data. Simultaneously, the radar level gauge emits high-frequency electromagnetic waves for measurement. Because both are parallel and their axes are perpendicular to the reflector, the laser data and radar measurement results can be directly compared to calibrate the radar level gauge's deviation. Utilizing the high-precision laser reference significantly improves calibration accuracy.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A device for calibrating a radar level gauge in the field includes a base plate, an mounting plate disposed above the base plate, a laser rangefinder fixedly connected to the top outer wall of the mounting plate, and a reflector plate for reflecting laser and high-frequency electromagnetic waves fixedly connected to the top outer wall of the base plate.

[0007] The top of the base plate is provided with a displacement component to facilitate the horizontal movement of the mounting plate;

[0008] The radar level gauge body is located on one side of the laser rangefinder, and a locking assembly for fixing the radar level gauge body is provided on the top of the mounting plate.

[0009] The above technical solutions enable rapid and accurate measurement of the radar level gauge body.

[0010] Preferably, the displacement component includes a groove formed on the top outer wall of the base plate, a slider is slidably connected in the groove, and the slider is fixedly connected to the mounting plate.

[0011] The above technical solution allows for multiple adjustments to the mounting plate position via a displacement component during the calibration process, thereby improving calibration accuracy.

[0012] Preferably, the locking assembly includes a gantry fixedly connected to the top outer wall of the mounting plate, a sector plate fixedly connected to one side of both the gantry and the mounting plate, a pin fixedly connected to one side outer wall of the sector plate, and one end of the pin passing through a locking hole on one side of the flange.

[0013] The above technical solutions can achieve initial positioning of the flange, avoid equipment shaking during calibration, and improve installation efficiency and positioning accuracy compared to traditional bolt fixing.

[0014] Preferably, a bidirectional lead screw is rotatably connected to the bottom inner wall of the mounting plate, a threaded sleeve is threaded to the outer circumference of the bidirectional lead screw, a locking pin is fixedly connected to one side of the outer wall of the threaded sleeve, an insertion hole is opened on the outer circumference of the locking pin, and one end of the locking pin is inserted into the insertion hole.

[0015] Through the above technical solution: when the bidirectional lead screw is rotated, the threaded sleeve drives the locking pin to move axially. After the locking pin is inserted into the insertion hole of the insertion pin, it can lock the insertion pin and the flange, forming a mechanical locking structure to ensure that the radar level gauge body is firmly fixed.

[0016] Preferably, guide posts are fixedly connected to one side of the gantry and one side of the mounting plate, and guide blocks are slidably connected to the outer circumferential wall of the guide posts, and the guide blocks are fixedly connected to another locking post.

[0017] Through the above technical solution: the guide post and the guide block form a sliding guide mechanism, which restricts the movement trajectory of the locking post, prevents the locking post from tilting when inserted into the socket, ensures a smooth and stable locking process, further improves the fixing accuracy of the radar level gauge body, and prevents calibration data deviation due to mechanical displacement.

[0018] Preferably, a rotating block is fixedly connected to one end of the bidirectional lead screw extending to the top of the gantry.

[0019] The above technical solutions enable rapid locking and unlocking of the locking pins, significantly reducing the installation and disassembly time of the radar level gauge body and improving on-site calibration efficiency.

[0020] Preferably, a U-shaped rod is fixedly connected to one side of the outer wall of the gantry, and a protective sleeve is fitted onto the outer circumference of the U-shaped rod.

[0021] The above technical solution provides a handle for the device using a U-shaped rod, and the protective cover is made of non-slip material, which facilitates the handling of the device while avoiding direct contact between the hands and metal parts, thus preventing scratches.

[0022] Preferably, the reflector is arranged perpendicularly to the base plate, and the laser rangefinder and the radar level gauge body are arranged parallel to each other on the top of the mounting plate.

[0023] The above technical solutions can eliminate false echo interference caused by reflector tilt or axis deviation, and significantly improve calibration accuracy.

[0024] The beneficial effects of this utility model are as follows:

[0025] In this invention, the reflector is vertically positioned to the base plate, and the laser rangefinder and radar level gauge are arranged parallel to each other on the top of the mounting plate. This ensures that the measurement axes of both are strictly perpendicular to the reflector surface, forming a unified calibration benchmark. The laser rangefinder, using high precision as a benchmark, directly compares its measurement data with that of the radar level gauge. This eliminates false echo interference caused by tilting of the reflector surface or deviation of the measurement axis in traditional calibration, significantly improving calibration accuracy. For example, when the radar level gauge experiences measurement deviations due to interference from foam, steam, or other factors on-site, the stable data from the laser rangefinder can be directly used for linear or nonlinear error correction, ensuring that the accuracy of level measurement is effectively improved after calibration.

[0026] In this invention, the locking assembly, through the linkage design of the sector plate, the insertion post, and the bidirectional lead screw, allows the radar level gauge flange to be inserted into the locking hole. Rotating the rotating block then drives the locking post to insert into the insertion post hole, achieving rapid fixation of the entire radar level gauge body. Compared with traditional bolt fixing, the installation time is effectively reduced. Furthermore, the cooperation between the guide post and the guide block ensures no shaking during locking, avoiding measurement errors caused by mechanical displacement. During calibration, the position of the mounting plate can be adjusted multiple times using the displacement assembly to improve calibration accuracy. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall left side structure of a field radar level gauge calibration device proposed in this utility model;

[0028] Figure 2 This utility model proposes a field radar level gauge calibration device. Figure 1 Enlarged structural diagram at point A;

[0029] Figure 3This is a schematic diagram of the overall right side structure of a field radar level gauge calibration device proposed in this utility model;

[0030] Figure 4 This utility model proposes a field radar level gauge calibration device. Figure 3 A magnified structural diagram at point B in the middle.

[0031] In the diagram: 1. Base plate; 2. Slide groove; 3. Reflector; 4. Mounting plate; 5. Slider; 6. Laser rangefinder; 7. U-shaped rod; 8. Radar level gauge body; 9. Protective sleeve; 10. Rotating block; 11. Threaded sleeve; 12. Two-way lead screw; 13. Clamping post; 14. Flange; 15. Clamping hole; 16. Insertion post; 17. Insertion hole; 18. Guide block; 19. Guide column; 20. Gantry; 21. Sector plate. Detailed Implementation

[0032] The technical solution of this patent will be further described in detail below with reference to specific embodiments.

[0033] Reference Figures 1-4 This application provides a field radar level gauge calibration device, including a base plate 1, an mounting plate 4 above the base plate 1, a laser rangefinder 6 fixedly connected to the top outer wall of the mounting plate 4, and a reflector 3 for reflecting laser and high-frequency electromagnetic waves fixedly connected to the top outer wall of the base plate 1.

[0034] The top of the base plate 1 is provided with a displacement component to facilitate the horizontal movement of the mounting plate 4;

[0035] The radar level gauge body 8 is located on one side of the laser rangefinder 6, and the top of the mounting plate 4 is provided with a locking assembly for fixing the radar level gauge body 8.

[0036] In order to improve the accuracy of calibration, refer to Figure 1 , Figure 3 The displacement component includes a groove 2 formed on the top outer wall of the base plate 1. A slider 5 is slidably connected in the groove 2. The slider 5 is fixedly connected to the mounting plate 4. The groove 2 and the slider 5 on the base plate 1 form a sliding guide structure. The mounting plate 4 can move horizontally along the groove 2 through the slider 5. Thus, during the calibration process, the position of the mounting plate 4 can be adjusted multiple times through the displacement component to improve the accuracy of the calibration.

[0037] To improve installation efficiency and positioning accuracy, refer to Figure 2 , Figure 4The locking assembly includes a gantry 20 fixedly connected to the top outer wall of the mounting plate 4. A sector plate 21 is fixedly connected to one side of both the gantry 20 and the mounting plate 4. A pin 16 is fixedly connected to the outer wall of one side of the sector plate 21. One end of the pin 16 passes through the hole 15 on one side of the flange 14. The gantry 20 and the sector plate 21 on the mounting plate 4 form a positioning structure. The pin 16 passes through the hole 15 of the flange 14 of the radar level gauge body 8 to achieve initial positioning of the flange 14 and prevent the equipment from shaking during calibration. Compared with traditional bolt fixing, the installation efficiency is improved and the positioning accuracy is higher.

[0038] To avoid measurement axis misalignment due to vibration and improve calibration stability, refer to Figure 2 , Figure 4 The bottom inner wall of the mounting plate 4 is rotatably connected to a two-way lead screw 12. The outer circumference of the two-way lead screw 12 is threadedly connected to a threaded sleeve 11. A locking pin 13 is fixedly connected to one side of the outer wall of the threaded sleeve 11. The outer circumference of the insertion pin 16 is provided with an insertion hole 17. One end of the locking pin 13 is inserted into the insertion hole 17. When the two-way lead screw 12 is rotated, the threaded sleeve 11 drives the locking pin 13 to move axially. After the locking pin 13 is inserted into the insertion hole 17 of the insertion pin 16, the insertion pin 16 and the flange 14 can be locked, forming a mechanical locking structure to ensure that the radar level gauge body 8 is firmly fixed.

[0039] To ensure a smooth and stable locking process, further improve the fixing accuracy of the radar level gauge body 8, and prevent calibration data deviation due to mechanical displacement, refer to... Figure 2 , Figure 4 Guide posts 19 are fixedly connected to one side of the gantry 20 and one side of the mounting plate 4. Guide blocks 18 are slidably connected to the outer circumference of the guide posts 19. The guide blocks 18 are fixedly connected to another locking post 13. The guide posts 19 and the guide blocks 18 form a sliding guide mechanism, which restricts the movement trajectory of the locking post 13, prevents the locking post 13 from tilting when it is inserted into the socket 17, ensures that the locking process is smooth and without shaking, further improves the fixing accuracy of the radar level gauge body 8, and prevents calibration data deviation due to mechanical displacement.

[0040] To shorten the installation and disassembly time of the radar level gauge body 8 and improve on-site calibration efficiency, refer to Figure 2 , Figure 4 A rotating block 10 is fixedly connected to one end of the bidirectional lead screw 12 extending to the top of the gantry 20. By rotating the rotating block 10, the bidirectional lead screw 12 can be easily driven to rotate, which can realize the quick locking and unlocking of the locking post 13, greatly shortening the installation and disassembly time of the radar level gauge body 8 and improving the efficiency of on-site calibration.

[0041] To improve the safety and comfort of on-site operations, refer to Figure 1 , Figure 3A U-shaped rod 7 is fixedly connected to one side of the outer wall of the gantry 20. A protective sleeve 9 is fitted around the outer circumference of the U-shaped rod 7. The U-shaped rod 7 provides a handle for the device. The protective sleeve 9 is made of non-slip material, which facilitates the handling of the device and avoids direct contact between the hands and metal parts, thus preventing scratches.

[0042] To eliminate false echo interference caused by reflector tilt or axis misalignment and significantly improve calibration accuracy, refer to Figure 1 , Figure 3 The reflector 3 is perpendicular to the base plate 1, and the laser rangefinder 6 and the radar level gauge body 8 are parallel to each other on the top of the mounting plate 4. The reflector 3 is perpendicular to the base plate 1, and the laser rangefinder 6 and the radar level gauge body 8 are arranged in parallel to ensure that the measuring axes of both are strictly perpendicular to the reflecting surface of the reflector 3, forming a unified calibration reference surface. At this time, the high-precision distance data of the laser rangefinder 6 can be directly compared with the measurement results of the radar level gauge body 8.

[0043] Working principle: The base plate 1 is fixed on site. The slide groove 2 and slider 5 on the top of the base plate 1 form a displacement assembly, pushing the mounting plate 4 to move horizontally along the slide groove 2. This ensures that the measuring axes of the laser rangefinder 6 and the radar level gauge body 8 on the top of the mounting plate 4 are aligned with the reflector 3, and the reflector 3 is perpendicular to the base plate 1. The laser rangefinder 6 and the radar level gauge are arranged parallel to each other on the top of the mounting plate 4, ensuring that their measuring axes are strictly perpendicular to the reflective surface of the reflector 3. This provides a unified benchmark for calibration and avoids measurement errors caused by angular deviations. Subsequently, the radar level gauge body 8 is... The flange 14 is placed on one side of the sector plate 21, so that the insert post 16 on the sector plate 21 passes through the clamping hole 15 of the flange 14 to complete the initial positioning. The rotating block 10 at the top of the rotating gantry 20 drives the double-acting screw 12 to rotate. When the threaded sleeve 11 moves on the double-acting screw 12, it pushes the clamping post 13 to insert into the insertion hole 17 of the insert post 16. At the same time, the guide post 19 and the guide block 18 cooperate to limit the movement trajectory of the clamping post 13, ensuring that the clamping post 13 is inserted smoothly and quickly locks the radar level gauge body 8, preventing it from shaking during measurement and improving the fixation stability.

[0044] After positioning is completed, the measuring axes of the laser rangefinder 6 and the radar level gauge are precisely perpendicular to the reflector 3. At this time, the laser rangefinder 6 emits laser light, which is reflected by the reflector 3 to obtain high-precision distance data. The radar level gauge simultaneously emits high-frequency electromagnetic waves for measurement. Since the two are set in parallel and their axes are perpendicular to the reflector 3, the laser data and radar measurement results can be directly compared to calibrate the deviation of the radar level gauge. The high-precision reference of the laser significantly improves the calibration accuracy. At the same time, during the calibration process, the position of the mounting plate 4 can be adjusted multiple times through the displacement component to improve the calibration accuracy.

[0045] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A field radar level gauge calibration device, comprising a base plate (1), characterized in that, An mounting plate (4) is provided above the base plate (1). A laser rangefinder (6) is fixedly connected to the top outer wall of the mounting plate (4). A reflector (3) for reflecting laser and high-frequency electromagnetic waves is fixedly connected to the top outer wall of the base plate (1). The top of the base plate (1) is provided with a displacement component to facilitate the horizontal movement of the mounting plate (4); The radar level gauge body (8) is located on one side of the laser rangefinder (6), and the top of the mounting plate (4) is provided with a locking assembly for fixing the radar level gauge body (8).

2. The field radar level gauge calibration device according to claim 1, characterized in that, The displacement assembly includes a groove (2) formed on the top outer wall of the base plate (1), and a slider (5) is slidably connected in the groove (2), and the slider (5) is fixedly connected to the mounting plate (4).

3. The field radar level gauge calibration device according to claim 2, characterized in that, The locking assembly includes a gantry (20) fixedly connected to the top outer wall of the mounting plate (4). A sector plate (21) is fixedly connected to one side of both the gantry (20) and the mounting plate (4). A pin (16) is fixedly connected to one side outer wall of the sector plate (21). One end of the pin (16) passes through the inside of the locking hole (15) on one side of the flange (14).

4. The field radar level gauge calibration device according to claim 3, characterized in that, The bottom inner wall of the mounting plate (4) is rotatably connected to a two-way lead screw (12), and the outer circumference of the two-way lead screw (12) is threadedly connected to a threaded sleeve (11). A locking pin (13) is fixedly connected to one side of the outer wall of the threaded sleeve (11). An insertion hole (17) is opened on the outer circumference of the insertion pin (16), and one end of the locking pin (13) is inserted into the insertion hole (17).

5. The field radar level gauge calibration device according to claim 4, characterized in that, One side of the gantry (20) and one side of the mounting plate (4) are fixedly connected to guide posts (19), and guide blocks (18) are slidably connected to the outer circumference of the guide posts (19). The guide blocks (18) are fixedly connected to another locking post (13).

6. The field radar level gauge calibration device according to claim 5, characterized in that, The bidirectional lead screw (12) is fixedly connected to a rotating block (10) at one end extending to the top of the gantry (20).

7. The field radar level gauge calibration device according to claim 3, characterized in that, A U-shaped rod (7) is fixedly connected to one side of the outer wall of the gantry (20), and a protective sleeve (9) is fitted onto the outer circumference of the U-shaped rod (7).

8. The field radar level gauge calibration device according to claim 1, characterized in that, The reflector (3) is perpendicular to the base plate (1), and the laser rangefinder (6) and the radar level gauge body (8) are parallel to each other on the top of the mounting plate (4).

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