Calibration device of radar level meter
By using a triangular fixed bracket and a rotation mechanism of multiple reflectors in the radar level gauge calibration device, the problems of reflector verticality and frame volume were solved, achieving high-precision and stable distance measurement.
Patent Information
- Application Number
- CN202423035003.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-10
- Publication Date
- 2025-11-11
- Estimated Expiration
- 2034-12-10
AI Technical Summary
In the calibration process of existing radar level gauges, it is difficult to ensure the verticality of the reflector during its movement and operation, which leads to the superposition of verticality error and range error, resulting in measurement error. In addition, the large size of the fixed frame affects placement.
A fixed bracket is used to set the reflector. The bracket has a triangular structure. The reflector rotates on the fixed bracket to the working or non-working calibration position. Distance measurement is performed at a preset reference point by multiple parallel reflectors to avoid movement. Position stability is ensured by limiting parts and driving devices.
It reduces measurement errors, improves the accuracy and stability of distance measurement, adapts to the calibration requirements of short and long distances, and reduces the space occupied by the fixed frame in the calibration process.
Smart Images
Figure CN223538385U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of calibration device technology, specifically to a calibration device for a radar level gauge. Background Technology
[0002] In existing technologies, the calibration of radar level gauges typically involves the radar level gauge emitting a radar signal towards a movable reflector and receiving the reflected signal. The calibration distance is then determined based on the distance between the radar level gauge and the reflector. This distance is measured using a measuring device. However, when the radar level gauge has a large range, calibration requires at least 5 to 10 points, necessitating multiple long-distance movements of the reflector. Maintaining accuracy during each of these movements becomes difficult.
[0003] Furthermore, when the measuring range is very large, it is difficult to ensure the verticality of the reflector during movement and operation. For example, the verticality error and the measuring range error will be superimposed, resulting in a large measurement error. This will cause the main lobe of the reflected signal to be misaligned with the radar level gauge, thus causing measurement error in the radar level gauge.
[0004] The existing solution involves mounting the reflector on a square fixed frame, then moving the frame to move the reflector. However, the fixed frame is bulky and may reflect radar waves. For short-range calibration, the fixed frame also occupies a certain amount of space. For closer calibration, the large size makes it difficult to place reflectors at adjacent preset reference points. Utility Model Content
[0005] This utility model provides a calibration device for a radar level gauge, which solves the technical problems of existing reflectors having difficulty in ensuring verticality during movement and operation, verticality error and range error superimposed to cause large measurement error in the radar level gauge calibration process, and the large size of the reflector fixing frame affecting placement.
[0006] To achieve the above objectives, this utility model provides a calibration device for a radar level gauge, including a reflector plate located on the opposite side of the radar level gauge, for receiving radar waves emitted by the radar level gauge and reflecting the radar waves to form a reflected wave.
[0007] The reflector is mounted on a fixed support, and the radar level gauge is mounted on a mounting platform. The radar level gauge obtains distance measurement values by emitting radar waves to the reflector and receiving the reflected waves reflected by the reflector. The reflector is mounted at a preset reference point position via the fixed support.
[0008] In one possible implementation of the first aspect of this utility model, the fixed bracket includes a first bracket and a second bracket, the first bracket and the second bracket forming an angle, and the first bracket or the second bracket having an angle with the reflector.
[0009] In one possible implementation of the first aspect of this utility model, the first bracket and the second bracket are arranged perpendicularly and adjacent to each other.
[0010] In one possible implementation of the first aspect of this utility model, the angle between the first bracket or the second bracket and the reflector is 45°.
[0011] In one possible implementation of the first aspect of this utility model, the fixed bracket further includes a support arm, and the first bracket and the second bracket are placed at a preset reference point position via the support arm.
[0012] In one possible implementation of the first aspect of this utility model, the number of support arms is set to three.
[0013] In one possible implementation of the first aspect of this utility model, the three support arms are arranged symmetrically or asymmetrically.
[0014] In one possible implementation of the first aspect of this utility model, the length of the support arm is greater than or equal to the height of the fixed bracket.
[0015] In one possible implementation of the first aspect of this utility model, the reflector is moved to different preset reference point positions by manual means, or the reflector is moved to different preset reference point positions by a driving device.
[0016] In one possible implementation of the first aspect of this utility model, a plurality of reflectors are provided, the plurality of reflectors are arranged in parallel, and the plurality of reflectors are perpendicular to the direction of the radar wave emitted by the radar level gauge.
[0017] In one possible implementation of the first aspect of this utility model, when the plurality of reflectors are calibrating a radar level gauge, one of the reflectors is in a working calibration position, and the other reflectors are in a non-working calibration position.
[0018] In one possible implementation of the first aspect of this utility model, the reflector is rotated on the fixed bracket to the working calibration position or the non-working calibration position via a rotating shaft.
[0019] In one possible implementation of the first aspect of this utility model, the rotation of the reflector to the working calibration position or the non-working calibration position is achieved manually or by a driving component.
[0020] In one possible implementation of the first aspect of this utility model, the driving component is a drive motor.
[0021] In one possible implementation of the first aspect of this utility model, a limiting part is further included, which is fixedly disposed on the fixed bracket and is used to limit the rotation of the reflector to the working calibration position.
[0022] In one possible implementation of the first aspect of this utility model, a fixed support plate is provided on the fixed bracket, and the limiting part, the driving component and the rotating shaft are fixedly disposed on the fixed support plate.
[0023] In one possible implementation of the first aspect of this utility model, the fixed support plate, the limiting part, the driving component and the rotating shaft are arranged in the space area enclosed by the first bracket and the second bracket.
[0024] In one possible implementation of the first aspect of this utility model, the bottom of the fixed bracket is provided with a support foot.
[0025] In one possible implementation of the first aspect of this utility model, the support foot is movably connected to the support arm, and the position of the fixed bracket is adjusted by the support foot.
[0026] In one possible implementation of the first aspect of this utility model, the number of the reflectors is greater than or equal to the number of the preset reference point positions.
[0027] This invention provides a calibration device for a radar level gauge, including a reflector plate located opposite the radar level gauge. The reflector plate receives radar waves emitted by the radar level gauge and reflects the radar waves to form a reflected wave. The reflector plate is mounted on a fixed support, and the radar level gauge is mounted on a mounting platform. The radar level gauge obtains distance measurement values by emitting radar waves towards the reflector plate and receiving the reflected waves. The reflector plate is positioned at a preset reference point via the fixed support. This invention uses a triangular support to mount the reflector plate, which not only provides good stability and repeatability during placement but also allows for the placement of multiple reflectors at multiple preset reference points. This eliminates the need to move the reflector plate during distance measurement. Furthermore, each reflector plate can rotate to a working calibration position during distance measurement and to a non-working calibration position during non-distance measurement, thereby significantly reducing measurement errors. Attached Figure Description
[0028] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the following detailed description to explain the present invention, but do not constitute a limitation thereof. In the drawings:
[0029] Figure 1 This is a schematic diagram of the structure of a calibration device for a radar level gauge provided by this utility model. Figure 1 ;
[0030] Figure 2 This is a schematic diagram of the structure of a calibration device for a radar level gauge provided by this utility model. Figure 2 ;
[0031] Figure 3 This is a schematic diagram of the structure of a calibration device for a radar level gauge provided by this utility model. Figure 3 ;
[0032] Figure 4 This is a schematic diagram of the structure of the components related to the reflector in this utility model. Figure 1 ;
[0033] Figure 5 yes Figure 4 Partial structural diagram;
[0034] Figure 6 This is a schematic diagram of the structure of the components related to the reflector in this utility model. Figure 2 ;
[0035] Figure 7 yes Figure 6 Top view of the center reflector rotated to the working calibration position;
[0036] Figure 8 yes Figure 6 Top view of the center reflector rotated to a non-working calibration position;
[0037] Figure 9 yes Figures 6 to 8 A partially enlarged schematic diagram of the components related to the middle support leg.
[0038] Summary of attached image labels:
[0039] 1. Radar level gauge; 2. Reflector; 3. Mounting platform
[0040] 4. Fixed bracket 41, first bracket 42, second bracket
[0041] 43. Support arm; 5. Fixed support plate; 6. Rotating shaft
[0042] 7. Limiting part; 8. Driving component; 9. Support foot
[0043] 91. Threaded assembly Detailed Implementation
[0044] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the present invention. Furthermore, it should be noted that, for ease of description, only the parts relevant to the present invention are shown in the accompanying drawings.
[0045] It should be noted that, where there is no conflict, the embodiments and features described in these embodiments can be combined with each other. The technical solution of this utility model will now be described in detail with reference to the accompanying drawings and embodiments.
[0046] Unless otherwise stated, the exemplary embodiments / exemplifications shown are to be understood as providing exemplary features of various details of ways in which the technical concept of this utility model can be implemented in practice. Therefore, unless otherwise stated, the features of various embodiments / exemplifications may be additionally combined, separated, interchanged and / or rearranged without departing from the technical concept of this utility model.
[0047] The use of crosshairs and / or shading in the accompanying drawings is generally used to clarify the boundaries between adjacent components. Thus, unless otherwise stated, the presence or absence of crosshairs or shading does not convey or indicate any preference or requirement for the specific material, material properties, dimensions, proportions, commonalities between the illustrated components, or any other characteristics, properties, etc., of the components. Furthermore, in the accompanying drawings, the dimensions and relative dimensions of components may be exaggerated for clarity and / or descriptive purposes. When exemplary embodiments can be implemented differently, a specific process sequence may be performed in a different order than that described. For example, two consecutively described processes may be performed substantially simultaneously or in the reverse order of their description. Furthermore, the same reference numerals denote the same components.
[0048] When a component is referred to as being "on" or "above" another component, "connected to," or "joined to" another component, the component may be directly on, directly connected to, or directly joined to the other component, or there may be intermediate components. However, when a component is referred to as being "directly on" another component, "directly connected to," or "directly joined to" another component, there are no intermediate components. Therefore, the term "connection" can refer to a physical connection, an electrical connection, etc., and may or may not have intermediate components.
[0049] like Figures 1-3As shown, this utility model discloses a calibration device for a radar level gauge, including a reflector 2 located opposite the radar level gauge 1. The reflector 2 is used to receive radar waves emitted by the radar level gauge 1 and reflect the radar waves to form reflected waves. The reflector 2 is mounted on a fixed bracket 4, and the radar level gauge 1 is mounted on a mounting platform 3. The radar level gauge 1 obtains distance measurement values by emitting radar waves towards the reflector 2 and receiving the reflected waves. The reflector 2 is positioned at a preset reference point.
[0050] Specifically, such as Figure 2 , 4 As shown in Figure 5, the fixed bracket 4 includes a first bracket 41 and a second bracket 42, the first bracket 41 and the second bracket 42 forming an angle, and the first bracket 41 or the second bracket 42 having an angle with the reflector 2.
[0051] To prevent the radar level gauge 1 from receiving reflected waves from other objects after the radar waves emitted towards the reflector plate 2 are reflected, it is preferable that the first bracket 41 and the second bracket 42 are arranged perpendicularly and adjacently, with the angle between the first bracket 41 or the second bracket 42 and the reflector plate 2 being 45°. During distance measurement, the reflector plate 2 is rotated to a position at 45° to the first bracket 41 or the second bracket 42. This position is perpendicular to the direction of the radar waves emitted by the radar level gauge 1. From this position, looking from the direction of the radar waves emitted by the radar level gauge 1, only the first bracket 41, the second bracket 42, and the reflector plate 2 are visible; other components (e.g., the fixed support plate 5, the drive motor, or the rotating shaft 6) are not visible.
[0052] In this invention, the first bracket 41 and the second bracket 42 are arranged perpendicularly and adjacently, and the angle between the first bracket 41 or the second bracket 42 and the reflector 2 is 45°. After the radar level gauge 1 emits radar waves perpendicularly towards the reflector 2, it will only receive the reflected waves reflected by the reflector 2. If the first bracket 41 or the second bracket 42 receives a portion of the radar waves, it will reflect a reflected wave parallel to the reflector 2. This reflected wave parallel to the reflector 2 is perpendicular to the reflected wave perpendicular to the reflector 2. Therefore, the radar level gauge 1 will not receive the reflected wave reflected by the first bracket 41 or the second bracket 42, thereby making the distance measurement more accurate.
[0053] like Figure 1 , 2As shown in Figures 4, 6-8, the fixed bracket 4 further includes a support arm 43, which is disposed at the bottom of the first bracket 41 and the second bracket 42. That is, the first bracket 41 and the second bracket 42 are placed at a preset reference point position by means of the support arm 43. The number of support arms 43 can be one, located directly below the first bracket 41 and the second bracket 42 as a base; or there can be multiple support arms 43 for supporting the first bracket 41 and the second bracket 42.
[0054] Figure 6-8 As shown, in this utility model, it is preferred to set the number of support arms 43 to 3, which are arranged symmetrically or asymmetrically. The number of support arms 43 is not specifically limited, but 3 support arms are preferred because the fixed bracket 4 with 3 support arms has better stability, and can be staggered in the case of multiple reflectors 2, resulting in high repeatability and suitability for short-distance and long-distance measurements.
[0055] Because the radar level gauge 1 requires high accuracy in distance measurement during calibration, it is necessary to ensure the stability of the reflector 2 by setting the length of the support arm 43 to be greater than or equal to the height of the fixed bracket 4.
[0056] This invention provides a calibration device for a radar level gauge, including a reflector 2 located opposite the radar level gauge 1. The reflector 2 receives radar waves emitted by the radar level gauge 1 and reflects the radar waves to form a reflected wave. The reflector 2 is mounted on a fixed support 4, and the radar level gauge 1 is mounted on a mounting platform 3. The radar level gauge 1 obtains distance measurement values by emitting radar waves to the reflector 2 and receiving the reflected waves. The reflector 2 is positioned at a preset reference point via the fixed support 4. In this invention, the reflector 2 is mounted on the fixed support 4, which is a triangular support. This not only provides good stability and repeatability during placement but also allows for multiple reflectors 2 to be positioned at multiple preset reference points. Therefore, the reflector 2 does not need to be moved during distance measurement. Furthermore, each reflector 2 can rotate to a working calibration position during distance measurement and to a non-working calibration position during non-distance measurement, thereby significantly reducing measurement errors.
[0057] In a further embodiment of this utility model, the reflector 2 can be moved manually to different preset reference point positions, or the reflector 2 can be moved to different preset reference point positions by a driving device. Moving the reflector 2 to the preset reference point position is a conventional method used in the calibration process of existing level gauges, and will not be described in detail here.
[0058] In another embodiment of this utility model, in order to ensure the accuracy of the distance measurement value and avoid the distance measurement error caused by moving the reflector 2 during the calibration process, a plurality of reflectors 2 are provided in this utility model. The plurality of reflectors 2 are arranged in parallel and are perpendicular to the direction of the radar wave emitted by the radar level gauge 1.
[0059] In this invention, multiple reflectors 2 are provided. During the calibration of the radar level gauge 1, the radar level gauge 1 sequentially emits radar waves to multiple reflectors 2 at multiple preset reference points, preferably in the calibration order. During the calibration of the radar level gauge 1, one of the reflectors 2 is in the working calibration position, while the others are in non-working calibration positions. The reflectors 2 in the working calibration position are perpendicular to the direction of the radar waves emitted by the radar level gauge 1, and are used to receive and reflect the radar waves; the reflectors 2 in the non-working calibration positions are parallel or nearly parallel to the direction of the radar waves emitted by the radar level gauge 1, and do not receive or reflect radar waves at this position.
[0060] Taking a radar level gauge 1 with five reflectors 2 arranged sequentially from closest to furthest away as an example, the five reflectors 2 are numbered 1, 2, 3, 4, and 5. These five reflectors 2 are positioned at five preset reference points. During calibration, the radar level gauge 1 first emits radar waves towards reflector 2 numbered 1, which is then in its working calibration position. The other reflectors 2 to 5 are in their non-working calibration positions. After the radar level gauge 1 receives the reflected wave from reflector 2 numbered 1, it rotates reflector 2 numbered 1 to its non-working calibration position under the drive of a motor, while reflector 2 numbered 2 rotates to its working calibration position. Reflectors 2 numbered 3 to 5 remain in their non-working calibration positions. This process continues until the radar level gauge 1 receives the reflected wave from reflector 2 numbered 5. At this time, the radar level gauge 1 will receive 5 distance measurement values. The radar level gauge 1 will be calibrated by analyzing and comparing these 5 distance measurement values with 5 preset distance standard values.
[0061] like Figures 1-3 As shown, during the calibration of radar level gauge 1, radar level gauge 1 needs to be placed on mounting platform 3. In order for the radar waves emitted by radar level gauge 1 to be received and emitted by reflector plate 2, reflector plate 2 is correspondingly placed on fixed bracket 4. The reflector plate 2 is rotated on fixed bracket 4 to the working calibration position or non-working calibration position via rotating shaft 6.
[0062] The rotation of the reflector 2 to the working calibration position or the non-working calibration position can be achieved manually or by the drive component 8. A limiting part 7 can be fixedly installed on the fixed bracket 4, and the reflector 2 is rotated to the limiting part 7 to switch from the non-working calibration position to the working calibration position. Since the stability of the reflector 2's position needs to be ensured during distance measurement, and to overcome the distance error caused by moving the reflector 2 to multiple preset reference points in the prior art, the limiting part 7 is used to mechanically limit the working calibration position. This ensures that the reflector 2 can only move within a limited range. Compared to the prior art technique of moving one reflector 2 to multiple preset reference points for distance measurement, this invention uses multiple parallel reflectors 2 at preset reference points, with the positions pre-calibrated by the system. During the measurement process, the reflectors 2 are not moved; distance measurement is achieved only by rotating the reflector 2 at multiple preset reference points.
[0063] The aforementioned limiting part 7 is mainly used to limit the rotation of the reflector 2 from the non-working calibration position to the working calibration position. The rotation from the non-working calibration position to the working calibration position can also be achieved by the limiting part or by controlling the rotation angle through the control module. The main point is that in the non-working calibration position, the reflector 2 needs to be hidden in the space area enclosed by the first bracket 41 and the second bracket 42, so that it will not receive radar waves and will not affect the distance measurement during the calibration process.
[0064] It should be noted that the aforementioned limiting part 7 can also be a limiting electronic switch, i.e., an electronic switch assembly, or the limiting part 7 can be combined with a limiting electronic assembly to achieve the limiting function. For example, the electronic switch assembly can be a photoelectric switch assembly, a capacitive proximity switch, an inductive proximity switch, etc.
[0065] To achieve intelligent rotation of the reflector 2, the reflector 2 can be rotated by a drive component 8, preferably a drive motor.
[0066] Since the calibration of the radar level gauge 1 requires calibration at least 5 to 10 points, in order to meet the distance measurement needs under different distance conditions such as short distance or long distance, the number of reflectors 2 in this invention is set to be greater than or equal to the number of preset reference points. This allows for the selection of the same number of reflectors 2 as the number of preset reference points at different measurement distances.
[0067] For example, when the measurement distance is 25m, five reflectors 2 can be set at distances of 5m, 10m, 15m, 20m, and 25m respectively, and these five reflectors 2 correspond exactly to the positions of five preset reference points. When the measurement distance is 15m, five reflectors 2 can be set at distances of 3m, 6m, 9m, 12m, and 15m respectively, and the preset reference point position corresponding to the 15m distance can be selected using the reflector 2 at the measurement distance of 25m. When the measurement distance is 50m, six reflectors 2 can be set at distances of 5m, 10m, 20m, 30m, 40m, and 50m respectively, and the preset reference point positions corresponding to the 5m, 10m, and 20m distances can be selected using the reflector 2 at the measurement distance of 25m.
[0068] In this utility model, a set of reflectors 2 with the same structure is set up. There are multiple reflectors 2 with the same structure. During the calibration process of the radar level gauge 1, the number and spacing of the multiple reflectors 2 can be selected according to the number of preset reference points and the distance of measurement.
[0069] For example, when performing long-distance measurements, a large number of reflectors 2 can be set up. When performing short-distance measurements later, a portion of the reflectors 2 can be selected for distance measurement. The position of this portion of the reflectors 2 corresponds to the position of the current preset reference point.
[0070] The fixed support plate 5 is provided on the fixed bracket 4. The limiting part 7, the driving component 8 and the rotating shaft 6 are fixedly arranged on the fixed support plate 5. At the same time, the fixed support plate 5, the limiting part 7, the driving component 8 and the rotating shaft 6 are arranged in the space area enclosed by the first bracket 41 and the second bracket 42.
[0071] like Figure 5 As shown, the first bracket 41 and the second bracket 42 are vertically arranged, and the fixed support plate 5 is horizontally arranged in the included space area formed by the first bracket 41 and the second bracket 42. The fixed support plate 5 is provided with a rotating shaft 6 for driving the reflector 2 to rotate, a drive motor, and a limiting part 7.
[0072] When placing the reflector 2 at the preset reference point, position calibration is required. During calibration, the height of the reflector 2 may need to be adjusted. For this purpose, a support foot 9 can be provided at the bottom of the support arm 43. The support foot 9 is movably connected to the support arm 43, and the position (e.g., height) of the fixed bracket 4 can be adjusted through the threaded assembly 91 on the support foot 9.
[0073] like Figure 1 , 2As shown in Figures 4 and 9, a threaded assembly 91 is provided on the support foot 9. The threaded assembly 91 is fixedly installed on the support foot 9. The support foot 9 and the support arm 43 are movably connected through the threaded assembly 91 to realize the adjustment of the height or position of the fixed bracket 4.
[0074] The calibration device for a radar level gauge disclosed in this utility model specifically employs the following steps during calibration:
[0075] Radar level gauge 1 emits radar waves;
[0076] The radar waves are reflected by the reflector 2 set at each preset reference point position;
[0077] The radar level gauge 1 receives reflected waves reflected by the reflector 2 at multiple preset reference points to obtain multiple distance measurement values at the multiple preset reference points.
[0078] The radar level gauge 1 is calibrated by using multiple distance measurements and multiple preset distance standard values.
[0079] This invention sets multiple reflectors 2 at multiple preset reference points, so that the reflectors 2 do not need to be moved during distance measurement. Each reflector 2 can be rotated to the working calibration position during distance measurement and to the non-working calibration position during non-distance measurement, thereby greatly reducing measurement error.
[0080] During the calibration of radar level gauge 1, radar level gauge 1 needs to be placed on mounting platform 3. In order for the radar waves emitted by radar level gauge 1 to be received and emitted by reflector plate 2, reflector plate 2 is correspondingly placed on fixed bracket 4. The reflector plate 2 is rotated on fixed bracket 4 to the working calibration position or non-working calibration position via rotating shaft 6.
[0081] The rotation of the reflector 2 to the working calibration position or the non-working calibration position can be achieved manually or by the drive component 8. A limiting part 7 can be fixedly installed on the fixed bracket 4, and the reflector 2 is rotated to the limiting part 7 to switch from the non-working calibration position to the working calibration position. Since distance measurement requires ensuring the stability of the reflector 2's position during measurement and overcoming the distance error caused by moving the reflector 2 to multiple preset reference points, the limiting part 7 is used to mechanically limit the working calibration position. This ensures that the reflector 2 can only move within a limited range. Compared to the existing technology that moves a single reflector 2 to multiple preset reference points for distance measurement, this invention uses multiple parallel reflectors 2 at preset reference points, with the positions pre-calibrated by the system. During the measurement process, the reflectors 2 are not moved; distance measurement at multiple preset reference points is achieved solely by rotating the reflector.
[0082] To achieve intelligent rotation of the reflector 2, the reflector 2 can be rotated by a drive component 8, preferably a drive motor.
[0083] The radar level gauge 1 receives reflected waves from the reflector 2 at multiple preset reference points to obtain multiple distance measurement values at those points, including the following steps:
[0084] Multiple reflectors 2 are arranged in a calibration order at corresponding preset reference point positions;
[0085] Control the multiple reflectors 2 to rotate sequentially to the working calibration position according to the calibration order;
[0086] The radar level gauge 1 receives and records multiple distance measurements.
[0087] It should be noted that in this utility model, the control device can control the drive motor to rotate the reflector 2 to the working calibration position in sequence. After the reflected wave reflected by the current reflector 2 is received by the radar level gauge 1, the control device receives the reflected wave signal and controls the drive motor to rotate the current reflector 2 to the non-working calibration position. At the same time, the adjacent reflector 2 is rotated to the working calibration position. The reflected wave signals at all preset reference point positions are obtained in this way.
[0088] Because the calibration process of radar level gauge 1 requires calibration at least 5 to 10 points, the following example uses five reflectors 2 numbered 1 to 5 and five preset reference points. The control device can simultaneously communicate with radar level gauge 1 and the drive component, controlling radar level gauge 1 to receive the reflected wave signals reflected by reflectors 2 in sequence. For example, it can rotate the corresponding reflectors 2 to the working calibration position in the order of number 1, 2, 3, 4, 5, 5, 4, 3, 2, 1 to perform distance measurement. Of course, it can also rotate the corresponding reflectors 2 to the working calibration position in the order of number 1, 2, 3, 4, 5, 5, etc. to perform distance measurement.
[0089] To ensure more accurate distance measurements, at least two distance measurements should be obtained at each preset reference point, preferably five distance measurements, and then compared with preset distance standard values to calibrate the radar level gauge 1.
[0090] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the specific details of the above embodiments. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, and these simple modifications all fall within the protection scope of the present invention.
[0091] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable way without contradiction. In order to avoid unnecessary repetition, this utility model will not describe the various possible combinations separately.
[0092] Furthermore, various different embodiments of this utility model can be combined in any way, as long as they do not violate the spirit of this utility model, they should also be regarded as the content disclosed by this utility model.
Claims
1. A calibration device for a radar level gauge, characterized in that, Includes a reflector, which is located on the opposite side of the radar level gauge and is used to receive radar waves emitted by the radar level gauge and reflect the radar waves to form a reflected wave. The reflector is mounted on a fixed support. The radar level gauge obtains distance measurement values by emitting radar waves to the reflector and receiving the reflected waves reflected by the reflector. The reflector is mounted at a preset reference point position via the fixed support.
2. The calibration device for a radar level gauge according to claim 1, characterized in that, The fixed bracket includes a first bracket and a second bracket, the first bracket and the second bracket forming an angle, and the first bracket or the second bracket having an angle with the reflector.
3. The calibration device for a radar level gauge according to claim 2, characterized in that, The first bracket and the second bracket are arranged perpendicularly and adjacent to each other.
4. The calibration device for a radar level gauge according to claim 3, characterized in that, The angle between the first or second bracket and the reflector is 45°.
5. The calibration device for a radar level gauge according to claim 2, characterized in that, The fixed bracket also includes a support arm, and the first bracket and the second bracket are placed at a preset reference point position via the support arm.
6. The calibration device for a radar level gauge according to claim 5, characterized in that, The number of support arms is set to 3.
7. The calibration device for a radar level gauge according to claim 6, characterized in that, The three support arms are arranged symmetrically or asymmetrically.
8. The calibration device for a radar level gauge according to claim 5, characterized in that, The length of the support arm is greater than or equal to the height of the fixed bracket.
9. The calibration device for a radar level gauge according to claim 1, characterized in that, The reflector can be moved manually to different preset reference point positions, or the reflector can be moved to different preset reference point positions by a driving device.
10. A calibration device for a radar level gauge according to claim 2, characterized in that, Multiple reflectors are provided, arranged in parallel, and the reflectors are perpendicular to the direction of the radar waves emitted by the radar level gauge.
11. A calibration device for a radar level gauge according to claim 10, characterized in that, When the radar level gauge is calibrated, one of the reflectors is in the working calibration position, while the other reflectors are in the non-working calibration position.
12. The calibration device for a radar level gauge according to claim 11, characterized in that, The reflector is rotated on the fixed bracket to either the working calibration position or the non-working calibration position via a rotating shaft.
13. A calibration device for a radar level gauge according to claim 12, characterized in that, The rotation of the reflector to the working calibration position or the non-working calibration position is achieved manually or by a driving component.
14. A calibration device for a radar level gauge according to claim 13, characterized in that, The driving component is a drive motor.
15. A calibration device for a radar level gauge according to claim 13, characterized in that, It also includes a limiting part, which is fixedly mounted on the fixed bracket and is used to limit the rotation of the reflector to the working calibration position.
16. A calibration device for a radar level gauge according to claim 15, characterized in that, A fixed support plate is provided on the fixed bracket, and the limiting part, the driving component and the rotating shaft are fixedly mounted on the fixed support plate.
17. A calibration device for a radar level gauge according to claim 16, characterized in that, The fixed support plate, the limiting part, the driving component, and the rotating shaft are arranged in the space area enclosed by the first bracket and the second bracket.
18. A calibration device for a radar level gauge according to claim 5, characterized in that, The bottom of the fixed bracket is provided with support feet.
19. A calibration device for a radar level gauge according to claim 18, characterized in that, The support foot is movably connected to the support arm, and the position of the fixed bracket can be adjusted by the support foot.
20. A calibration device for a radar level gauge according to any one of claims 10-19, characterized in that, The number of reflectors is greater than or equal to the number of preset reference points.