Calibration device and calibration method of high-precision radar level meter

Abstract

The invention provides a calibration device for a high-precision radar level meter, and the calibration device comprises a plurality of reflecting plates which are all located at the opposite side of the radar level meter and are used for receiving radar waves emitted by the radar level meter and can reflect the radar waves to form reflected waves; wherein the radar level meter obtains a distance measurement value by transmitting radar waves to the reflecting plates and receiving reflected waves reflected by the reflecting plates, and the plurality of reflecting plates are arranged at a plurality of preset reference point positions. The invention further provides a calibration method of the high-precision radar level meter. According to the invention, the plurality of reflecting plates are arranged at the plurality of preset reference point positions, so that the reflecting plates do not need to be moved in the distance measurement process, and each reflecting plate can rotate to the working calibration position during measurement and rotate to the non-working calibration position during non-distance measurement, so that the measurement error can be greatly reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of calibration devices, and in particular to a calibration device and a calibration method for a high-precision radar level meter. Background Art

[0002] In the prior art, the radar level meter is usually calibrated in the following way: the radar level meter transmits a radar signal to a movable target plate and receives the reflected signal from the target plate, thereby obtaining the calibration distance according to the distance between the radar level meter and the target plate. The distance between the target plate and the radar level meter is obtained by a measuring device. However, when the range of the radar level meter is large, at least 5 to 10 points of calibration are required during the calibration process of the radar level meter, so it is necessary to move the target plate over long distances multiple times, but it is difficult to ensure accuracy during each movement.

[0003] In addition, when the measuring range is large, it is difficult to ensure the verticality of the target plate during movement and operation. For example, the superposition of the verticality error and the measuring range error will cause a large measurement error, resulting in the main lobe of the reflected signal being unable to align with the radar level meter, thereby causing the measurement error of the radar level meter.

[0004] Therefore, a device capable of calibrating a radar level meter with high precision is needed in the art. Summary of the invention

[0005] The present invention provides a calibration device and a calibration method for a high-precision radar level meter, which are used to solve the technical problem that it is difficult to ensure the verticality of an existing target plate during movement and operation, and the superposition of the verticality error and the range error will cause a large measurement error in the calibration process of the radar level meter.

[0006] In order to achieve the above-mentioned object, the present invention provides, on one hand, a calibration device for a high-precision radar level meter, comprising a plurality of reflective plates, wherein the plurality of reflective plates are located on opposite sides of the radar level meter, and are used to receive radar waves emitted by the radar level meter and reflect the radar waves to form reflected waves;

[0007] The radar level meter acquires the distance measurement value by transmitting radar waves to the reflector and receiving reflected waves reflected by the reflector. A plurality of reflectors are arranged at a plurality of preset reference point positions.

[0008] In a possible implementation of the first aspect of the present invention, the plurality of reflecting plates are arranged in parallel, and the plurality of reflecting plates are perpendicular to a direction in which radar waves emitted by the radar level meter are emitted.

[0009] In a possible implementation of the first aspect of the present invention, when the radar level meter is calibrated using the multiple reflective plates, one of the reflective plates is at a working calibration position, and the other reflective plates are at a non-working calibration position.

[0010] In a possible implementation of the first aspect of the present invention, the reflective plate is disposed on a fixed bracket, and the reflective plate is rotated on the fixed bracket to the working calibration position or the non-working calibration position via a rotating shaft.

[0011] In a possible implementation of the first aspect of the present invention, the reflective plate is rotated to the working calibration position or the non-working calibration position and the switching is achieved manually or by a driving component.

[0012] In a possible implementation of the first aspect of the present invention, the driving component is a driving motor.

[0013] In a possible implementation of the first aspect of the present invention, a limiting portion is further included, and the limiting portion is fixedly disposed on the fixing bracket and is used to limit the reflection plate from rotating to the working calibration position.

[0014] In a possible implementation of the first aspect of the present invention, a fixed support plate is provided on the fixed bracket, and the limiting portion, the driving component and the rotating shaft are fixedly provided on the fixed support plate.

[0015] In a possible implementation of the first aspect of the present invention, it is characterized in that the fixed bracket includes a first bracket and a second bracket, the first bracket and the second bracket form an angle, and there is an angle between the first bracket or the second bracket and the reflective plate.

[0016] In a possible implementation of the first aspect of the present invention, the first bracket and the second bracket are arranged perpendicularly and adjacently.

[0017] In a possible implementation of the first aspect of the present invention, an angle between the first bracket or the second bracket and the reflective plate is 45°.

[0018] In a possible implementation of the first aspect of the present invention, the fixed support plate, the limiting portion, the driving component and the rotating shaft are arranged in a space area enclosed by the first bracket and the second bracket.

[0019] In a possible implementation of the first aspect of the present invention, a mounting base is provided at the bottom of the fixing bracket.

[0020] In a possible implementation of the first aspect of the present invention, the mounting base is connected to the fixing bracket, and the position of the fixing bracket is adjusted through the mounting base.

[0021] In a possible implementation of the first aspect of the present invention, the radar level meter is arranged on a mounting platform.

[0022] In a possible implementation of the first aspect of the present invention, the number of the reflection plates is greater than or equal to the number of the preset reference point positions.

[0023] The second aspect of the present invention discloses a calibration method for a high-precision radar level meter calibration device, comprising the following steps:

[0024] The radar level meter transmits radar waves;

[0025] Reflecting radar waves by the reflector correspondingly arranged at each preset reference point;

[0026] The radar level meter receives reflected waves reflected by the reflective plate at a plurality of preset reference point positions to obtain a plurality of distance measurement values ​​at the plurality of preset reference point positions;

[0027] The radar level meter is calibrated by using a plurality of distance measurement values ​​and a plurality of preset distance standard values.

[0028] In a possible implementation of the second aspect of the present invention, the radar level meter receives reflected waves reflected by the reflector at multiple preset reference point positions to obtain multiple distance measurement values ​​at the multiple preset reference point positions, including the following steps:

[0029] The plurality of reflective plates are arranged at corresponding positions of the preset reference points according to a calibration order;

[0030] The plurality of reflective plates are rotated to the working calibration positions in sequence according to the calibration sequence;

[0031] The radar level meter acquires a plurality of distance measurements and records them.

[0032] The present invention provides a calibration device for a high-precision radar level meter, including a plurality of reflectors, which are all located on the opposite side of the radar level meter, for receiving radar waves emitted by the radar level meter and capable of reflecting the radar waves to form reflected waves; wherein the radar level meter acquires distance measurement values ​​by emitting radar waves to the reflectors and receiving reflected waves reflected by the reflectors, and the plurality of reflectors are arranged at preset reference point positions. The present invention also provides a calibration method for a high-precision radar level meter. The present invention arranges a plurality of reflectors at a plurality of preset reference point positions in correspondence, thereby eliminating the need to move the reflectors during distance measurement, and each reflector can be rotated to a working calibration position during distance measurement, and to a non-working calibration position during non-distance measurement, thereby greatly reducing measurement errors. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present invention but do not constitute a limitation of the present invention. In the accompanying drawings:

[0034] Figure 1 The structure diagram of a calibration device for a high-precision radar level meter provided by the present invention is shown in FIG. Figure 1 ;

[0035] Figure 2 The structure diagram of a calibration device for a high-precision radar level meter provided by the present invention is shown in FIG. Figure 2 ;

[0036] Figure 3 The structure diagram of a calibration device for a high-precision radar level meter provided by the present invention is shown in FIG. Figure 3 ;

[0037] Figure 4 is a schematic diagram of a structure in which a reflector is arranged at a preset reference point;

[0038] Figure 5 yes Figure 4 Schematic diagram of part of the structure.

[0039] Summary of reference numerals:

[0040] 1. Radar level meter 2. Reflector 3. Mounting table

[0041] 4. Fixed bracket 41, first bracket 42, second bracket

[0042] 5. Fixed support plate 6. Rotating shaft 7. Limiting part

[0043] 8. Driving component 9. Mounting base 91. Threaded assembly

[0044] 92. Support legs DETAILED DESCRIPTION

[0045] The present invention will be further described in detail below in conjunction with the accompanying drawings and implementations. It is to be understood that the specific implementations described herein are only used to explain the relevant content, rather than to limit the present invention. It is also necessary to explain that, for ease of description, only the parts related to the present invention are shown in the accompanying drawings.

[0046] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. The technical solution of the present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0047] Unless otherwise specified, the exemplary embodiments / embodiments shown will be understood as exemplary features that provide various details of some ways in which the technical concept of the present invention can be implemented in practice. Therefore, unless otherwise specified, the features of the various embodiments / embodiments can be combined, separated, interchanged and / or rearranged without departing from the technical concept of the present invention.

[0048] The use of cross-hatching and / or shading in the accompanying drawings is generally used to make the boundaries between adjacent components clear. As such, unless otherwise specified, the presence or absence of cross-hatching or shading does not convey or indicate any preference or requirement for the specific materials, material properties, dimensions, proportions, commonalities between the components shown, and / or any other characteristics, attributes, properties, etc. of the components. In addition, in the accompanying drawings, the sizes and relative sizes of the components may be exaggerated for clarity and / or descriptive purposes. When the exemplary embodiments can be implemented differently, the specific process sequence can be performed in a different order than described. For example, two successively described processes can be performed substantially simultaneously or in an order opposite to the described order. In addition, the same figure numbers represent the same components.

[0049] When a component is referred to as being "on" or "over," "connected to," or "coupled to" another component, the component may be directly on, directly connected to, or directly coupled to the other component, or intervening components may be present. However, when a component is referred to as being "directly on," "directly connected to," or "directly coupled to" another component, there are no intervening components. For this purpose, the term "connected" may refer to a physical connection, an electrical connection, etc., with or without intervening components.

[0050] like Figure 1 and 2 As shown, the present invention discloses a calibration device for a high-precision radar level meter, comprising a plurality of reflectors 2, each of which is located on the opposite side of a radar level meter 1, and is used to receive radar waves emitted by the radar level meter 1 and reflect the radar waves to form reflected waves. The radar level meter 1 acquires a distance measurement value by emitting radar waves to the reflectors 2 and receiving reflected waves reflected by the reflectors 2, and the plurality of reflectors 2 are arranged at preset reference point positions.

[0051] Since at least 5 to 10 points need to be calibrated during the calibration process of the radar level meter 1, in order to meet the distance measurement under different distance conditions such as short distance or long distance, the number of the reflective plates 2 is set to be greater than or equal to the number of the preset reference point positions in the present invention, thereby meeting the requirement of selecting the same number of reflective plates 2 as the number of the preset reference point positions at different measurement distances.

[0052] For example, when the measuring distance is 25m, you can choose to set 5 reflectors 2 at distances of 5m, 10m, 15m, 20m, and 25m respectively, and the 5 reflectors 2 just correspond to the 5 preset reference point positions; when the measuring distance is 15m, you can choose to set 5 reflectors 2 at distances of 3m, 6m, 9m, 12m, and 15m respectively, at this time, the preset reference point position corresponding to the distance of 15m can choose the reflector 2 when the measuring distance is 25m; when the measuring distance is 50m, you can choose to set 6 reflectors 2 at distances of 5m, 10m, 20m, 30m, 40m, and 50m respectively, at this time, the preset reference point position corresponding to the distance of 5m, 10m, and 20m can choose the reflector 2 when the measuring distance is 25m.

[0053] In the present invention, a group of reflective plates 2 with the same structure is provided. A group of reflective plates 2 with the same structure is a plurality of reflective plates 2. During the calibration of the radar level meter 1, the reflective plates 2 with a suitable number and spacing can be selected according to the number of preset reference point positions and the measurement distance.

[0054] For example, a larger number of reflectors 2 may be provided for long-distance measurement, and a portion of the reflectors 2 may be selected for distance measurement in subsequent close-distance measurement, where the positions of the portion of reflectors 2 correspond to the current preset reference point positions.

[0055] 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 measurement process, a plurality of reflectors 2 are provided in the present invention, and the plurality of reflectors 2 are arranged in parallel and perpendicular to the direction in which the radar wave is emitted by the radar level meter 1.

[0056] In the present invention, a plurality of reflectors 2 are provided. During the calibration process of the radar level meter 1, the radar level meter 1 will sequentially transmit radar waves to the plurality of reflectors 2 at the positions of the plurality of preset reference points, and preferably, the calibration is performed sequentially. When the plurality of reflectors 2 are calibrating the radar level meter 1, one of the reflectors 2 is at the working calibration position, and the remaining reflectors 2 are at the non-working calibration position. Among them, the reflector 2 at the working calibration position is perpendicular to the direction in which the radar level meter 1 transmits the radar wave, and is used to receive the radar wave and reflect it; the reflector 2 at the non-working calibration position is parallel or nearly parallel to the direction in which the radar level meter 1 transmits the radar wave, and this position does not receive the radar wave and does not reflect the radar wave.

[0057] Among them, taking the example that five reflectors 2 are arranged in sequence from near to far from the radar level meter 1, the five reflectors 2 are numbered 1, 2, 3, 4, and 5 respectively, and the five reflectors 2 numbered 1-5 are arranged at five preset reference point positions in sequence. During the calibration process, the radar level meter 1 first transmits radar waves to the reflector 2 numbered 1. At this time, the reflector 2 numbered 1 is located at the working calibration position, and the other reflectors 2 numbered 2-5 are located at the non-working calibration positions; after the radar level meter 1 receives the reflected wave reflected by the reflector 2 numbered 1, the reflector 2 numbered 1 is rotated to the non-working calibration position driven by the driving motor, and the reflector 2 numbered 2 is rotated to the working calibration position at the same time, and the reflectors 2 numbered 3-5 are kept at the non-working calibration position; and the process is carried out in sequence until the radar level meter 1 receives the reflected wave reflected by the reflector 2 numbered 5. At this time, the radar level meter 1 will receive 5 distance measurement values, and the radar level meter 1 will be calibrated by analyzing and comparing the 5 distance measurement values ​​with 5 preset distance standard values.

[0058] The present invention provides a calibration device for a high-precision radar level meter 1, which includes a plurality of reflectors 2, which are all located on the opposite side of the radar level meter 1, and are used to receive radar waves emitted by the radar level meter 1 and can reflect the radar waves to form reflected waves; wherein the radar level meter 1 acquires distance measurement values ​​by emitting radar waves to the reflectors 2 and receiving reflected waves reflected by the reflectors 2, and the plurality of reflectors 2 are arranged at preset reference point positions. The present invention arranges a plurality of reflectors 2 at a plurality of preset reference point positions, thereby eliminating the need to move the reflectors 2 during distance measurement, and each reflector 2 can be rotated to a working calibration position during distance measurement, and rotated to a non-working calibration position during non-distance measurement, thereby greatly reducing measurement errors.

[0059] like Figure 1-3 As shown, during the calibration process of the radar level meter 1, the radar level meter 1 needs to be placed on the mounting platform 3. In order to allow the radar waves emitted by the radar level meter 1 to be received and reflected by the reflector 2, the reflector 2 is correspondingly placed on the fixed bracket 4. The reflector 2 is rotated on the fixed bracket 4 to the working calibration position or the non-working calibration position through the rotating shaft 6.

[0060] The reflector 2 can be rotated to the working calibration position or the non-working calibration position by manual switching or by a driving component 8. A limiting portion 7 can be fixedly set on the fixed bracket 4, and the reflector 2 can be rotated to the position where the limiting portion 7 is limited to switch from the non-working calibration position to the working calibration position. Since the stability of the position of the reflector 2 needs to be ensured during the distance measurement process, and the distance error generated by moving the reflector 2 to multiple preset reference point positions in the prior art needs to be overcome, the working calibration position is mechanically limited by the setting of the limiting portion 7, so that the reflector 2 can only be moved within a limited range. Compared with the technology of measuring the distance by moving a reflector 2 to multiple preset reference point positions in the prior art, the present invention sets multiple parallel reflectors 2 at the preset reference point positions, calibrates the position in advance through the system, does not move the reflector 2 during the measurement process, and only rotates the reflector 2 to achieve distance measurement at multiple preset reference point positions.

[0061] The above-mentioned limit portion 7 is mainly used to achieve limit when the reflector 2 rotates 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 through the limit portion, and can also be achieved by controlling the rotation angle through the control module. The limit portion 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.

[0062] It should be noted that the above-mentioned limiter 7 can also be a limiter electronic switch, that is, an electronic switch component, or the limiter 7 is combined with a limiter electronic component to achieve the limiter function. For example, the electronic switch component can be a photoelectric switch component, a capacitive proximity switch, an inductive proximity switch, etc.

[0063] In order to realize intelligent driving of the reflection plate 2 to rotate, the reflection plate 2 may be rotated by a driving component 8 , and preferably, the driving component 8 may be a driving motor.

[0064] Specifically, Figure 2 and 4 As shown, the fixed bracket 4 includes a first bracket 41 and a second bracket 42, the first bracket 41 and the second bracket 42 form an angle, and the first bracket 41 or the second bracket 42 has an angle with the reflector 2. The fixed bracket 4 is provided with a fixed support plate 5, the limit portion 7, the driving component 8 and the rotating shaft 6 are fixedly arranged on the fixed support plate 5, and the fixed support plate 5, the limit portion 7, the driving component 8 and the rotating shaft 6 are hidden in the space area surrounded by the first bracket 41 and the second bracket 42.

[0065] like Figure 5As shown, the first bracket 41 and the second bracket 42 are vertically arranged, and the fixed support plate 5 is horizontally arranged in the angle space area enclosed by the first bracket 41 and the second bracket 42. The fixed support plate 5 is provided with a rotating shaft 6, a driving motor, and a limit part 7 for driving the reflection plate 2 to rotate.

[0066] In order to prevent the radar level meter 1 from receiving the reflected waves of the radar waves emitted to the reflector 2 and reflected by other objects, it is preferably necessary to set the first bracket 41 and the second bracket 42 perpendicularly and adjacently, and the angle between the first bracket 41 or the second bracket 42 and the reflector 2 is 45°. When measuring the distance, the reflector 2 is rotated to a position at 45° with the first bracket 41 or the second bracket 42, which is perpendicular to the direction in which the radar level meter 1 emits the radar waves. At this position, from the direction in which the radar level meter 1 emits the radar waves, only the first bracket 41, the second bracket 42 and the reflector 2 can be seen, and other components (fixed support plate 5, drive motor or rotating shaft 6) cannot be seen.

[0067] In the present 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 meter 1 transmits the radar wave perpendicularly to the reflector 2, it will only receive the reflected wave reflected by the reflector 2. At this time, if the first bracket 41 or the second bracket 42 receives a part of the radar wave, it will reflect a reflected wave parallel to the reflector 2. The reflected wave parallel to the reflector 2 is perpendicular to the reflected wave perpendicular to the reflector 2 reflected by the reflector 2. The radar level meter 1 will not receive the reflected wave reflected by the first bracket 41 or the second bracket 42, thereby making the distance measurement value more accurate.

[0068] When the reflector 2 is placed 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 mounting base 9 may be provided at the bottom of the fixed bracket 4. The mounting base 9 is connected to the fixed bracket 4, and the height of the fixed bracket 4 is adjusted by a threaded assembly 91 on the mounting base 9.

[0069] like Figure 1 , 2 As shown in FIG. 4 , a threaded assembly 91 may be provided around or on the side of the mounting base 9 , and the threaded assembly 91 is fixedly provided on a supporting foot 92 , and the supporting foot 92 and the mounting base 9 are movably connected via the threaded assembly 91 to achieve height adjustment of the fixed bracket 4 .

[0070] The present invention also discloses a calibration method for a high-precision radar level meter, comprising the following steps:

[0071] The radar level meter 1 transmits radar waves;

[0072] Reflecting radar waves by the reflector 2 correspondingly arranged at each preset reference point;

[0073] The radar level meter 1 receives reflected waves reflected by the reflector 2 at a plurality of preset reference point positions to obtain a plurality of distance measurement values ​​at the plurality of preset reference point positions;

[0074] The radar level meter 1 is calibrated by using a plurality of distance measurement values ​​and a plurality of preset distance standard values.

[0075] The present invention sets multiple reflective plates 2 at multiple preset reference point positions, thereby eliminating the need to move the reflective plates 2 during distance measurement, and each reflective plate 2 can be rotated to a working calibration position during measurement and to a non-working calibration position during non-distance measurement, thereby greatly reducing measurement errors.

[0076] During the calibration process of the radar level meter 1, the radar level meter 1 needs to be placed on the mounting platform 3. In order to allow the radar waves emitted by the radar level meter 1 to be received and reflected by the reflector 2, the reflector 2 is correspondingly placed on the fixed bracket 4. The reflector 2 is rotated on the fixed bracket 4 to the working calibration position or the non-working calibration position through the rotating shaft 6.

[0077] The reflector 2 can be rotated to the working calibration position or the non-working calibration position by manual switching or by a driving component 8. A limiting portion 7 can be fixedly set on the fixed bracket 4, and the reflector 2 can be rotated to the position where the limiting portion 7 is limited to switch from the non-working calibration position to the working calibration position. Since the stability of the position of the reflector 2 during measurement needs to be ensured, and the distance error generated by moving the reflector 2 to multiple preset reference point positions needs to be overcome, the working calibration position is mechanically limited by setting the limiting portion 7, so that the reflector 2 can only move within a limited range. Compared with the technology of measuring the distance by moving a reflector 2 to multiple preset reference point positions in the prior art, the present invention sets multiple parallel reflectors 2 at the preset reference point positions, calibrates the position in advance through the system, does not move the reflector 2 during the measurement process, and only rotates the plate to achieve distance measurement at multiple preset reference point positions.

[0078] In order to realize intelligent driving of the reflection plate 2 to rotate, the reflection plate 2 may be rotated by a driving component 8 , and preferably, the driving component 8 may be a driving motor.

[0079] The radar level meter 1 receives the reflected waves reflected by the reflector 2 at the positions of the multiple preset reference points to obtain the multiple distance measurement values ​​at the positions of the multiple preset reference points, including the following steps:

[0080] The plurality of reflective plates 2 are arranged at the corresponding preset reference point positions according to the calibration order;

[0081] Controlling the plurality of reflective plates 2 to rotate to working calibration positions in sequence according to the calibration sequence;

[0082] The radar level meter 1 acquires a plurality of distance measurement values ​​and records them.

[0083] It should be noted that in the present invention, the control device can be used to control the driving motor to rotate the reflecting plate 2 to the working calibration position in sequence. After the reflected wave reflected by the current reflecting plate 2 is received by the radar level meter 1, the control device controls the driving motor to rotate the current reflecting plate 2 to the non-working calibration position after receiving the reflected wave signal, and at the same time rotates the adjacent reflecting plate 2 to the working calibration position, and follows this step until the reflected wave signals at all preset reference point positions are obtained.

[0084] Since at least 5 to 10 points of calibration are required during the calibration process of the radar level meter 1. As described below, taking the five reflectors 2 numbered 1-5 and the five preset reference point positions as an example, the control device can simultaneously communicate with the radar level meter 1 and the drive component, and control the radar level meter 1 to sequentially receive the reflected wave signals reflected by the reflectors 2, for example, rotating the corresponding reflectors 2 in the order of number 1, number 2, number 3, number 4, number 5, number 5, number 4, number 3, number 2, and number 1 to the working calibration position for distance measurement. Of course, the corresponding reflectors 2 can also be rotated in the order of number 1, number 1, number 2, number 2, number 3, number 3, number 4, number 4, number 5, number 5, etc. to the working calibration position for distance measurement.

[0085] In order to ensure that the distance measurement values ​​obtained are more accurate, at least 2 distance measurement values ​​need to be obtained at each preset reference point position, preferably 5 distance measurement values ​​need to be obtained at each preset reference point position, and then analyzed and compared with the preset distance standard value to calibrate the radar level meter 1.

[0086] The preferred embodiments of the present invention are described in detail above in conjunction with the accompanying drawings. However, the present invention is not limited to the specific details in the above embodiments. Within the technical concept of the present invention, a variety of simple modifications can be made to the technical solution of the present invention, and these simple modifications all belong to the protection scope of the present invention.

[0087] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations.

[0088] In addition, various embodiments of the present invention may be arbitrarily combined, and as long as they do not violate the concept of the present invention, they should also be regarded as the contents disclosed by the present invention.

Claims

1. A calibration device for a high-precision radar level meter, characterized in that: It comprises a plurality of reflecting plates, which are all located at the opposite side of the radar level meter and are used to receive radar waves emitted by the radar level meter and reflect the radar waves to form reflected waves; The radar level meter acquires the distance measurement value by transmitting radar waves to the reflector and receiving reflected waves reflected by the reflector. A plurality of reflectors are arranged at a plurality of preset reference point positions.

2. The calibration device for a high-precision radar level meter according to claim 1, characterized in that: The plurality of reflecting plates are arranged in parallel, and the plurality of reflecting plates are perpendicular to the direction in which the radar waves emitted by the radar level meter are emitted.

3. The calibration device for a high-precision radar level meter according to claim 1, characterized in that: When the radar level meter is calibrated using the plurality of reflectors, one of the reflectors is at a working calibration position, and the other reflectors are at a non-working calibration position.

4. The calibration device for a high-precision radar level meter according to claim 3, characterized in that: The reflective plate is arranged on a fixed bracket, and the reflective plate is rotated on the fixed bracket to the working calibration position or the non-working calibration position through a rotating shaft; Wherein, the reflector plate is rotated to the working calibration position or the non-working calibration position to realize switching manually or through a driving component; Preferably, the driving component is a driving motor.

5. The high-precision radar level meter calibration device according to claim 4, characterized in that: It also includes a limiting portion, which is fixedly arranged on the fixing bracket and is used to limit the reflection plate from rotating to the working calibration position.

6. The calibration device for a high-precision radar level meter according to claim 5, characterized in that: The fixed bracket is provided with a fixed support plate, and the limiting portion, the driving component and the rotating shaft are fixedly arranged on the fixed support plate.

7. A high-precision radar level meter calibration device according to any one of claims 4 to 6, characterized in that: The fixed bracket includes a first bracket and a second bracket, the first bracket and the second bracket form an angle, and the first bracket or the second bracket and the reflective plate have an angle; Wherein, the first bracket is perpendicular to the second bracket and is arranged adjacent to each other; the angle between the first bracket or the second bracket and the reflector is 45°; The fixed support plate, the limiting portion, the driving component and the rotating shaft are arranged in a space area surrounded by the first bracket and the second bracket.

8. The high-precision radar level meter calibration device according to claim 7, characterized in that: A mounting base is provided at the bottom of the fixing bracket; Wherein, the mounting base is connected to the fixing bracket, and the position of the fixing bracket is adjusted through the mounting base.

9. The calibration device for a high-precision radar level meter according to claim 1, characterized in that: The number of the reflection plates is greater than or equal to the number of the preset reference point positions.

10. A calibration method for a high-precision radar level meter, characterized in that: The steps include: The radar level meter transmits radar waves; Reflecting radar waves by the reflector correspondingly arranged at each preset reference point; The radar level meter receives reflected waves reflected by the reflective plate at a plurality of preset reference point positions to obtain a plurality of distance measurement values ​​at the plurality of preset reference point positions; Calibration of the radar level meter is performed by using a plurality of distance measurement values ​​and a plurality of preset distance standard values; The radar level meter receives the reflected waves reflected by the reflector at the positions of the multiple preset reference points to obtain multiple distance measurement values ​​at the positions of the multiple preset reference points, including the following steps: The plurality of reflective plates are arranged at corresponding positions of the preset reference points according to a calibration order; The plurality of reflective plates are rotated to the working calibration positions in sequence according to the calibration sequence; The radar level meter acquires a plurality of distance measurements and records them.

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