On-site level simulation device and on-site in-situ calibration method of level meter

Abstract

The invention discloses an on-site level simulation device and an on-site in-situ calibration method of a level meter, and belongs to the technical field of level measurement. The field level simulation device comprises a lifting module, a reflecting plate leveling module, a reflecting plate and a control system, the lifting module is used for adjusting the height of the reflecting plate leveling module and the height of the reflecting plate, and the reflecting plate leveling module is matched with the control system to be used for adjusting the horizontal posture of the reflecting plate. Therefore, it is ensured that the geometrical relationship among the beam axis of the spatial reflective level meter to be calibrated, the measurement axis of the length standard device such as the laser interferometer and the measurement reference target meets the calibration requirement of the standard one-dimensional length, and the in-situ calibration precision of the spatial reflective level meter is improved. The on-site in-situ calibration method of the level meter is applied to the on-site level simulation device, the in-situ calibration precision is high, and the daily level measurement requirement can be met.

Description

Technical Field

[0001] The present invention relates to the field of level measurement technology, and specifically to an on-site level simulation device and an on-site in-situ calibration method of a level meter. Background Art

[0002] At present, with the increasing demand for level measurement in the fields of shipping, petroleum, and chemical industry, reflective level meters such as radar have also developed rapidly. However, although most reflective level meters have passed the calibration and certification of measurement units, the measurement accuracy cannot meet the requirements in actual use, which brings great trouble to daily level measurement work. This is because the calibration of reflective level meters is carried out in a laboratory environment, and the laboratory environmental conditions are quite different from the field conditions. It is also difficult for the installation status of the reflective level meter to be consistent with the field, so that the in-situ parameters marked in the laboratory are not applicable to the field.

[0003] In the prior art, the problem of setting up a standard calibration environment for a reflective level meter on site is solved by installing a secondary tube in the waveguide bypass of the reflective level meter and installing a reflector in the secondary tube to provide a reference. However, for a spatial reflective level meter without a waveguide, it is difficult to install an additional waveguide and a secondary tube on an already built large-scale capacity measuring instrument, making it difficult to perform on-site in-situ calibration of the spatial reflective level meter.

[0004] Due to the above technical defects, most spatial reflective level meters do not undergo in-situ calibration, and the accuracy of the measurement value is unknown and cannot be guaranteed. In the few cases where in-situ calibration is required, manual on-site in-situ calibration can only be performed. Specifically, the reflector is manually lifted as a calibration reference target, and a steel tape measure or laser rangefinder generates a reference value for comparison and calibration. In the manual on-site in-situ calibration, not only the horizontal state and stability of the reflector cannot be guaranteed, but also the calibration height of the reflector is limited and cannot cover the measurement range of the spatial reflective level meter.

[0005] Therefore, there is an urgent need for an on-site level simulation device to solve the above problems. Summary of the invention

[0006] The purpose of this application is to solve or at least alleviate part or all of the above problems. To this end, the purpose of this application is to provide an on-site level simulation device and an on-site in-situ calibration method of a level meter, which can provide a measurement reference target for the spatial reflective level meter to be calibrated, improve the in-situ calibration accuracy of the spatial reflective level meter, and meet the accuracy requirements of daily level measurement.

[0007] In order to achieve the above objectives, this application adopts the following technical solutions:

[0008] In a first aspect, a field level simulation device is provided for field in-situ calibration of a spatial reflective level meter, the field level simulation device comprising:

[0009] A lifting module, comprising a frame and a lifting mechanism, wherein the lifting mechanism comprises a lifting platform capable of being lifted and lowered relative to the frame;

[0010] A reflector plate leveling module, comprising a leveling platform and a leveling mechanism, wherein three leveling mechanisms are installed on the lifting platform and arranged in an equilateral triangle, and an output end of each leveling mechanism is connected to the leveling platform and is used to adjust the horizontal posture of the leveling platform;

[0011] A reflective plate, fixed to the leveling platform;

[0012] The control system comprises a control module and a dual-axis tilt sensor, wherein the dual-axis tilt sensor is installed on the reflector plate, and the control module can control the leveling mechanism to adjust the horizontal posture of the leveling platform according to the detection result of the dual-axis tilt sensor.

[0013] As an optional solution for the on-site level simulation device, the leveling mechanism includes a ball joint assembly and a leveling drive assembly. The leveling drive assembly is fixedly connected to the lifting platform via the ball joint assembly. The output end of the leveling drive assembly is connected to the leveling platform and can be lifted and lowered relative to the lifting platform.

[0014] As an optional solution for the on-site level simulation device, the ball joint assembly includes a ball joint seat and a ball head component, the ball joint seat is fixed to the lifting platform, and the ball joint seat has a spherical groove and an opening connected to the spherical groove, the ball head component includes a connecting part and a spherical part, the spherical part cooperates with the spherical groove, the connecting part extends through the opening to the outside of the ball joint seat and is used to install the leveling drive assembly.

[0015] As an optional solution for the on-site level simulation device, the lifting module also includes an anti-sway mechanism, the frame includes a base and at least two columns fixed on the base, the anti-sway mechanism is provided on the side of the lifting platform opposite to the columns, and each anti-sway mechanism slides and rolls with the corresponding column.

[0016] As an optional solution for the on-site level simulation device, the anti-sway mechanism includes a bracket, a sliding member and a rolling assembly. The bracket is fixed to the lifting platform, the sliding member and the rolling assembly are both fixed to the bracket, the column has a sliding groove that slides with the sliding member and extends in the vertical direction, and the ball of the rolling assembly abuts against the column.

[0017] As an optional solution for the on-site level simulation device, the lifting module also includes a rack leveling assembly, which includes a fixing member and a lifting support member, the fixing member is fixed on the base, the lifting support member is threadedly connected to the fixing member and extends in a vertical direction, and the bottom of the lifting support member can abut against the placement surface of the base; at least three of the rack leveling assemblies are evenly spaced and arranged, and are used to adjust the horizontal posture of the base.

[0018] In a second aspect, a method for calibrating a level meter on site is provided. Based on the on-site level simulation device as described in any one of the above items, the method for calibrating the level meter on site on site comprises the following steps:

[0019] Equipment assembly: assemble the on-site level simulation device; install the spatial reflective level meter at H1 above the beam, and make the center of the antenna aperture of the spatial reflective level meter and the center of the beam hole on the same vertical line; install the laser interferometer at the center of the bottom of the reflector;

[0020] In-situ calibration: lift the lifting platform to the required height, then adjust the horizontal posture of the reflector, and make the center of the reflector, the center of the beam hole and the center of the antenna aperture of the spatial reflective level meter collinear.

[0021] As an optional solution of the on-site in-situ calibration method of the level meter, adjusting the horizontal posture of the reflector includes the following steps:

[0022] The intersections of the three leveling mechanisms and the leveling platform are respectively marked as point A, point B, and point C, wherein the line between point A and point B is marked as the first axis, the line between point A and point C is marked as the second axis, the angle between the first axis and the horizontal plane is α, and the angle between the second axis and the horizontal plane is β;

[0023] The dual-axis tilt sensor detects the values ​​of α and β;

[0024] Determine the highest point among points A, B, and C based on α and β;

[0025] If point A is the highest, first make the leveling mechanism corresponding to point B drive the leveling platform to rise until α is less than 0.01°, then make the leveling mechanism corresponding to point C drive the leveling platform to rise until β is less than 0.01°, and finally lock all the leveling mechanisms;

[0026] If point B is the highest, first the leveling mechanism corresponding to point A drives the leveling platform to rise until α is less than 0.01°, then the leveling mechanism corresponding to point C drives the leveling platform to rise until β is less than 0.01°, and finally all the leveling mechanisms are locked;

[0027] If point C is the highest, first make the leveling mechanism corresponding to point A drive the leveling platform to rise until β is less than 0.01°, then make the leveling mechanism corresponding to point B drive the leveling platform to rise until α is less than 0.01°, and finally lock all the leveling mechanisms.

[0028] As an optional solution for the on-site in-situ calibration method of the level meter, Wherein, D1 is the diameter of the beam hole, and θ is the beam angle of the spatial reflective level meter.

[0029] As an optional solution for the on-site in-situ calibration method of the level meter, the diameter of the reflector plate is Among them, H max It is the distance between the reflecting plate and the spatial reflective level meter when the spatial reflective level meter is at the maximum calibration height.

[0030] The beneficial effects of this application are:

[0031] The on-site level simulation device provided by the present application includes a lifting module, a reflector leveling module, a reflector and a control system. The lifting module is used to adjust the height of the reflector leveling module and the reflector. The reflector leveling module cooperates with the control system to adjust the horizontal posture of the reflector to ensure that the geometric relationship between the beam axis of the spatial reflective level meter to be calibrated, the measurement axis of a length standard such as a laser interferometer, and the measurement reference target meets the calibration requirements of the standard one-dimensional length, thereby improving the in-situ calibration accuracy of the spatial reflective level meter.

[0032] The on-site in-situ calibration method of the level meter provided in the present application uses the above-mentioned on-site level simulation device, and the in-situ calibration accuracy is high, which can meet the daily level measurement needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments of the present application. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present application and these drawings without paying any creative work.

[0034] Figure 1 A schematic structural diagram of an on-site level simulation device provided in an embodiment of the present application is shown.

[0035] Figure 2 A structural schematic diagram of the lifting module provided in an embodiment of the present application is shown.

[0036] Figure 3 A schematic structural diagram of a lifting platform provided in an embodiment of the present application is shown.

[0037] Figure 4 A schematic structural diagram of a base provided in an embodiment of the present application is shown.

[0038] Figure 5 Shows Figure 4 Schematic diagram of the partial structure of the middle base.

[0039] Figure 6 A partial structural schematic diagram of the lifting platform and columns provided in an embodiment of the present application is shown.

[0040] Figure 7 Shows Figure 6 Schematic diagram of the structure of the anti-sway mechanism.

[0041] Figure 8 Shows Figure 6 Schematic cross-sectional view of the anti-sway mechanism in one direction.

[0042] Fig. 9 Shows Figure 6 Schematic cross-sectional view of the anti-sway mechanism in another direction.

[0043] Fig.10 A structural schematic diagram of the reflector plate leveling module provided in the present application is shown.

[0044] Fig.11 Shows Fig.10 Schematic diagram of the structure of the middle leveling mechanism.

[0045] Fig.12 Shows Fig.11 Schematic diagram of partial cross-section of the center leveling mechanism.

[0046] Fig.13 A schematic diagram of the installation positions of a spatial reflective level meter and an on-site level simulation device provided in an embodiment of the present application is shown.

[0047] Fig.14 A schematic diagram of a reflector plate leveling module provided in an embodiment of the present application is shown.

[0048] Fig.15 A schematic diagram of a process for adjusting the horizontal posture of a reflector provided in an embodiment of the present application is shown.

[0049] Reference numerals:

[0050] 100. Spatial reflective level meter;

[0051] 1. Lifting module; 11. Frame; 111. Base; 1111. Bottom frame; 1112. Column fixing piece; 112. Column; 1121. Slide; 113. Crossbeam; 1131. Beam hole; 12. Lifting mechanism; 121. Lifting platform; 122. Lifting drive assembly; 1221. Lifting drive; 1222. Guide wheel; 1223. Wire rope; 12231. Sub-rope cable; 1224. Limiting ring; 1225. Limiting piece; 122 6. Bracket; 123. Lifting ring; 13. Rack leveling assembly; 131. Fixing piece; 132. Lifting support piece; 133. Hand wheel; 1331. Wheel; 1332. Lever; 14. Anti-sway mechanism; 141. Bracket; 1411. Connecting piece; 1412. Mounting piece; 1413. Elastic piece; 1414. Guide piece; 1415. Damping bearing; 142. Sliding piece; 143. Rolling assembly; 1431. Fixing plate; 1432. Ball;

[0052] 2. Reflector plate leveling module; 21. Leveling platform; 211. Frame; 212. Mounting seat; 213. First connecting member; 214. Second connecting member; 215. Fixed arm; 22. Leveling mechanism; 22a. First leveling mechanism; 22b. Second leveling mechanism; 22c. Third leveling mechanism; 221. Ball joint assembly; 2211. Ball joint seat; 22111. Fixed seat; 22112. First cover plate; 22113. Second cover plate; 2212. Ball head member; 22121. Connecting part; 22122. Spherical part; 2213. Sleeve; 222. Leveling drive assembly; 2221. Leveling drive; 2222. Lifting member; 22221. Anti-rotation cam;

[0053] 3. Reflector;

[0054] 41. Dual-axis inclination sensor; 42. Control module. DETAILED DESCRIPTION

[0055] Before any embodiments of the application are explained in detail, it is to be understood that the application is not limited in its application to the details of construction and the arrangement of components set forth in the following description or illustrated in the above drawings.

[0056] In this application, the terms "comprises", "includes", "has" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device that includes a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of more restrictions, an element defined by the sentence "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device that includes the element.

[0057] In this application, the term "and / or" is a description of the association relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this application generally indicates that the related objects before and after are in an "and / or" relationship.

[0058] In the present application, the terms "connect", "combine", "couple", and "install" may refer to direct connection, combination, coupling, or installation, or indirect connection, combination, coupling, or installation. For example, direct connection refers to two parts or components being connected together without setting an intermediate piece, and indirect connection refers to two parts or components being connected to at least one intermediate piece respectively, and the two parts or components are connected through the intermediate piece.

[0059] In this application, it will be understood by those skilled in the art that relative terms (e.g., "about," "approximately," "substantially," etc.) used in conjunction with quantities or conditions include the values ​​and have the meaning indicated by the context. For example, the relative terms include at least the degree of error associated with the measurement of a specific value, the tolerances associated with a specific value caused by manufacturing, assembly, use, etc. Such terms should also be considered to disclose a range defined by the absolute values ​​of the two endpoints. Relative terms may refer to plus or minus a certain percentage (e.g., 1%, 5%, 10% or more) of the indicated value.

[0060] In this application, it will be understood by those skilled in the art that the function performed by a component can be performed by one component, multiple components, one part, or multiple parts. Similarly, the function performed by a part can also be performed by one part, one component, or a combination of multiple parts.

[0061] In the present application, the terms "upper", "lower", "left", "right", "front", "back" and other directional words are described based on the orientation and positional relationship shown in the accompanying drawings, and should not be understood as limiting the embodiments of the present application. In addition, in the context, it is also necessary to understand that when it is mentioned that an element is connected to another element "upper" or "lower", it can not only be directly connected to another element "upper" or "lower", but also indirectly connected to another element "upper" or "lower" through an intermediate element. It should also be understood that directional words such as upper side, lower side, left side, right side, front side, back side, etc. not only represent the positive orientation, but can also be understood as the lateral orientation. For example, the bottom can include directly below, lower left, lower right, lower front, and lower back, etc.

[0062] The field level simulation device provided by the present application is used for in-situ calibration of a spatial reflective level meter. It can provide a measurement reference target that can cover the entire calibration height range for the spatial reflective level meter to be calibrated and length standards such as laser interferometers on site, thereby ensuring that the geometric relationship among the beam axis of the spatial reflective level meter to be calibrated, the measurement axis of length standards such as laser interferometers, and the measurement reference target meets the standard one-dimensional length calibration requirements.

[0063] It should be noted that the field level simulation device provided by this application solves the technical problem that there is a lack of practical, stable, reliable and portable field level simulation devices for in-situ calibration of spatial reflective level meters at present, and compared with manual in-situ calibration, it can realize the value traceability of spatial reflective level meters under in-situ conditions. In addition, the field level simulation device can be used to build a standard environment for in-situ calibration of spatial reflective level meters in environments such as ships and storage tanks.

[0064] Figure 1 FIG. 1 shows a schematic diagram of the structure of the on-site level simulation device provided in an embodiment of the present application. Figure 1 As shown, the on-site level simulation device includes a lifting module 1, a reflector plate leveling module 2, a reflector plate 3 and a control system. The lifting module 1 is used to adjust the height of the reflector plate 3, and the reflector plate leveling module 2 cooperates with the control system to adjust the horizontal posture of the reflector plate 3 to ensure that the geometric relationship among the beam axis of the spatial reflective level meter to be calibrated, the measuring axis of the length standard such as the laser interferometer, and the measurement reference target meets the calibration requirements of the standard one-dimensional length, thereby improving the in-situ calibration accuracy of the spatial reflective level meter.

[0065] In this embodiment, the control system includes a control module 42 and a dual-axis tilt sensor 41. The dual-axis tilt sensor 41 is installed on the reflector 3. The control module 42 can control the reflector leveling module 2 to adjust the horizontal posture of the reflector 3 according to the detection result of the dual-axis tilt sensor 41.

[0066] For the spatial reflective level meter, the key technical difficulty of the lifting module 1 does not lie in the optimization of the lifting speed or the improvement of the carrying capacity, but in improving the stability of the lifting module 1, ensuring the precise control of its horizontal posture, and the overall portability of the lifting module 1 and its deadweight management. In particular, it is necessary to consider the impact of the lifting process on the measuring instrument, such as avoiding any obstruction to the beam of the spatial reflective level meter and the measurement beam of length standards such as laser interferometers, and eliminating the clutter interference that may be introduced by the device structure itself, so as to ensure the authenticity of the measurement results of the spatial reflective level meter.

[0067] However, the existing single-arm vertical lifting, scissor-type, screw-type lifting modules on the market are mostly used in outdoor operations or vertical transportation of goods. They are heavy and have large loads, are not easy to carry, and have defects such as beam blocking and clutter interference. Moreover, most of them do not have horizontal posture control capabilities and cannot meet the requirements of on-site in-situ calibration of space-based reflective level meters.

[0068] The lifting module 1 provided in the present application is easy to carry, can achieve smooth lifting and lowering, ensures precise control of its horizontal posture, avoids any obstruction to the beam of the spatial reflective level meter and the measurement beam of length standards such as laser interferometers, and eliminates clutter interference that may be introduced by the structure itself, thereby ensuring the authenticity of the measurement results of the spatial reflective level meter.

[0069] Figure 2 The structural diagram of the lifting module 1 provided in the embodiment of the present application is shown. Figure 2 As shown, the lifting module 1 provided in the present application includes a frame 11 and a lifting mechanism 12, the frame 11 includes a base 111, a column 112 and a crossbeam 113, the column 112 is along the vertical direction and fixed on the base 111, the crossbeam 113 is fixed to the upper end of the column 112, and the crossbeam 113 has a beam hole 1131; the lifting mechanism 12 includes a lifting platform 121 that can be lifted and lowered relative to the column 112, the reflector plate leveling module 2 is installed on the lifting platform 121, and the reflector plate 3 is installed on the reflector plate leveling module 2, and the reflector plate leveling module 2 and the reflector plate 3 are driven to lift to the required height by the lifting platform 121. It can be understood that the column 112 can adopt an integrated structure or a multi-section combination structure, wherein the multiple sections are detachably fixed by bolts.

[0070] The lifting mechanism 12 also includes a lifting drive assembly 122, which is used to drive the lifting platform 121 to lift. The lifting drive assembly 122 includes a lifting drive 1221, a guide wheel 1222 and a wire rope 1223. The lifting drive 1221 is fixed to the base 111, the guide wheel 1222 is fixed to the crossbeam 113, the wire rope 1223 passes around the guide wheel 1222, and one end of the wire rope 1223 is connected to the lifting drive 1221, and the other end is connected to the lifting platform 121. In application, the lifting drive 1221 can drive the wire rope 1223 to wind, thereby realizing the lifting operation of the lifting platform 121.

[0071] In this embodiment, there are two guide wheels 1222, which are arranged at intervals and are both used to guide the wire rope 1223. One of the guide wheels 1222 is located at the edge of the crossbeam 113, and is used to ensure that the wire rope 1223 is smoothly wound around the wheel surface of the guide wheel 1222 in the vertical direction. The other guide wheel 1222 is located in the middle position of the crossbeam 113, and is used to ensure that the wire rope 1223 extends in the vertical direction and is smoothly wound around the wheel surface of the guide wheel 1222. The two guide wheels 1222 can ensure the stability of the overall movement of the wire rope 1223.

[0072] The lifting driver 1221 can use a servo motor, and the lifting drive component 122 also includes a reducer and a wire rope winding disk. The servo motor is connected to the wire rope winding disk through the reducer, and the wire rope winding disk is driven to wind the wire rope 1223, so that the wire rope 1223 drives the lifting platform 121 to rise and fall.

[0073] In addition, the lifting drive assembly 122 also includes a limit ring 1224 and a limit member 1225. The limit ring 1224 is installed on the wire rope 1223, and the limit member 1225 is installed on the column 112. The limit member 1225 has a through hole, and the diameter of the through hole is larger than the diameter of the wire rope 1223 and smaller than the diameter of the limit ring 1224. The limit ring 1224 and the limit member 1225 are abutted against each other to limit the lowest position of the lifting platform 121.

[0074] Figure 3 FIG. 1 is a schematic diagram showing the structure of the lifting platform 121 provided in the embodiment of the present application. Figure 3 As shown, the lifting mechanism 12 further includes a lifting ring 123, at least three lifting rings 123 are evenly spaced and fixed on the lifting platform 121, and the steel wire rope 1223 has a plurality of sub-cables 12231, and each sub-cable 12231 is connected to each lifting ring 123 in a one-to-one correspondence. For example, the three lifting rings 123 are arranged in an equilateral triangle on the lifting platform 121, and the steel wire rope 1223 has three sub-cables 12231, and each sub-cable 12231 is fixedly connected to each lifting ring 123, and the confluence of the three sub-cables 12231 and the center of the lifting platform 121 are located on the same vertical line, so that each lifting ring 123 is subjected to equivalent force, so as to ensure that the lifting platform 121 is subjected to balanced force as a whole, thereby ensuring the stability of the lifting platform 121 during the lifting process.

[0075] In this embodiment, the lifting platform 121 is in a square shape, which is not only convenient for the processing and manufacturing of the lifting platform 121 , but also conducive to the calibration of the center and center of gravity of the lifting platform 121 , thereby facilitating the positioning and installation of the lifting ring 123 .

[0076] Figure 4 FIG. 1 shows a schematic diagram of the structure of the base 111 provided in an embodiment of the present application. Figure 4As shown, the base 111 includes a bottom frame 1111 and a column fixing member 1112, the column fixing member 1112 is in a U-shape, two arms of the column fixing member 1112 are fixed to the bottom frame 1111, and the column 112 and the lifting drive 1221 are both installed on the column fixing member 1112. Such an arrangement can improve the installation strength of the column 112, and at the same time provide an installation position for the lifting drive 1221, thereby ensuring the stability of the lifting drive 1221.

[0077] The lifting drive assembly 122 also includes a bracket 1226, which is fixed to the column fixing member 1112, and the bracket 1226 has a mounting slot for accommodating the lifting drive 1221. For example, the bracket 1226 can be formed by combining metal plates, which can not only ensure the bearing capacity of the bracket 1226, but also ensure the structural strength of the bracket 1226.

[0078] Figure 5 Shows Figure 4 A schematic diagram of the partial structure of the middle base 111. Figure 5 As shown, the lifting module 1 also includes a frame leveling component 13, which is used to adjust the horizontal posture of the base 111 to ensure the overall stability of the lifting module 1 and make the horizontal state of the lifting module 1 meet the calibration requirements. It should be noted that the frame leveling component 13 can achieve rough leveling of the entire on-site level simulation device by adjusting the horizontal posture of the base 111.

[0079] The rack leveling assembly 13 includes a fixing member 131 and a lifting support member 132. The fixing member 131 is fixed to the bottom frame 1111 of the base 111. The lifting support member 132 is threadedly connected to the fixing member 131 and extends in the vertical direction. The bottom of the lifting support member 132 can abut against the placement surface of the base 111. The four rack leveling assemblies 13 are evenly spaced and used to adjust the horizontal posture of the base 111. Specifically, the bottom frame 1111 is in the shape of a quadrilateral, and the four rack leveling assemblies 13 are respectively arranged at the four corners of the bottom frame 1111. In other embodiments, the number of the rack leveling assemblies 13 is at least three, which will not be illustrated one by one here.

[0080] The rack leveling assembly 13 also includes a hand wheel 133, which is fixed to the top of the lifting support 132. The hand wheel 133 is rotated to make the lifting support 132 rise and fall relative to the fixing member 131 for easy operation. Further, the hand wheel 133 includes a wheel disc 1331 and a lever 1332. The wheel disc 1331 is fixed to the top of the lifting support 132, and the lever 1332 is fixed to the wheel disc 1331 and extends in the vertical direction. In application, the operator rotates the hand wheel 133 by holding the lever 1332, thereby raising or lowering the lifting support 132, thereby adjusting the horizontal posture of the base 111.

[0081] Figure 6 FIG. 1 shows a partial structural diagram of the lifting platform 121 and the column 112 provided in the embodiment of the present application. Figure 6 Combination Figure 2 As shown, the lifting module 1 also includes an anti-sway mechanism 14, which is used to ensure that the lifting platform 121 is stably lifted and lowered relative to the column 112 to prevent the lifting platform 121 from shaking significantly. In this embodiment, the two columns 112 are symmetrically fixed on the base 111, and the anti-sway mechanism 14 is provided on the side of the lifting platform 121 opposite to the column 112, and each anti-sway mechanism 14 slides and rolls with the corresponding column 112. In other embodiments, the number of columns 112 can also be any number such as three, four, or five, which will not be described one by one here.

[0082] Figure 7 Shows Figure 6 A schematic structural diagram of the middle anti-sway mechanism 14. Figure 8 Shows Figure 6 A schematic cross-sectional view of the middle anti-sway mechanism 14 in one direction. Fig. 9 Shows Figure 6 A schematic cross-sectional view of the anti-sway mechanism 14 in another direction. Figures 7 to 9 As shown, the anti-sway mechanism 14 includes a bracket 141 and a sliding member 142, the bracket 141 is fixed to the lifting platform 121, the sliding member 142 is fixed to the bracket 141, and the column 112 has a slide groove 1121 that slides with the sliding member 142 and extends in the vertical direction. The sliding member 142 cooperates with the slide groove 1121 on the column 112 to guide the lifting of the lifting platform 121, ensuring that the lifting platform 121 is stably lifted in the vertical direction, and preventing the lifting platform 121 from tilting forward and backward at a large angle during the lifting process.

[0083] The anti-sway mechanism 14 further includes a rolling assembly 143, which includes a fixed disk 1431 and a ball 1432. The fixed disk 1431 is fixed to the bracket 141, and the fixed disk 1431 has a spherical annular groove for accommodating the ball 1432. The spherical surface of the ball 1432 abuts against the column 112. When the lifting platform 121 is lifted or lowered, the friction between the ball 1432 and the column 112 is rolling friction, which can not only reduce the friction during the lifting process of the lifting platform 121, but also ensure the stable lifting of the lifting platform 121.

[0084] In this embodiment, the rolling assembly 143 has two sets of ball groups, each of which has at least two balls 1432, and the two sets of ball groups are respectively located on both sides of the slide groove 1121. In other words, the spherical surface of the ball 1432 abuts against the surface of the column 112, and the sliding member 142 extends into the slide groove 1121 of the column 112.

[0085] Sliders 142 are provided above and below the rolling assembly 143. That is, there are two sliders 142, which are respectively located above and below the rolling assembly 143. The provision of the two sliders 142 can further ensure that the lifting platform 121 is stably lifted and lowered along the slide groove 1121.

[0086] The bracket 141 includes a connecting member 1411, a mounting member 1412 and an elastic member 1413. The connecting member 1411 is fixed to the lifting platform 121. The mounting member 1412 is arranged parallel to the connecting member 1411 and is used to fix the sliding member 142 and the rolling assembly 143. The elastic member 1413 is located between the mounting member 1412 and the connecting member 1411, and the elastic deformation direction of the elastic member 1413 is the same as the arrangement direction of the mounting member 1412 and the connecting member 1411. In this way, the mounting member 1412 can move elastically relative to the connecting member 1411 through the elastic member 1413, which can not only absorb and reduce the vibration generated by the lifting platform 121 during the lifting movement, so that the lifting platform 121 can quickly and stably stop, but also prevent the sliding member 142 from abutting against the bottom surface of the slide groove 1121 and getting stuck in the slide groove 1121.

[0087] The bracket 141 further includes a guide member 1414, one end of which is fixed to the mounting member 1412, and the other end of which is slidably matched with the connecting member 1411. The elastic member 1413 is sleeved outside the guide member 1414, and the guide member 1414 is used to limit and guide the elastic member 1413. For example, the elastic member 1413 can be a spring, and the guide member 1414 can be a guide rod.

[0088] Furthermore, the bracket 141 further includes a damping bearing 1415, which is fixed to the connecting member 1411 and slidably cooperates with the guide member 1414. The damping bearing 1415 provides a certain damping when the guide member 1414 slides relative to the connecting member 1411, reduces the movement of the guide member 1414, and improves the overall stability of the anti-sway mechanism 14.

[0089] In this embodiment, the elastic member 1413, the guide member 1414 and the damping bearing 1415 are arranged in groups, and the bracket 141 has two groups, and the two groups are respectively located on the left and right sides of the rolling assembly 143 to ensure the stable connection between the mounting member 1412 and the connecting member 1411, and to balance the force on the mounting member 1412 as a whole. In other embodiments, the number of groups of the elastic member 1413, the guide member 1414 and the damping bearing 1415 can also be three groups, four groups, five groups, etc., which will not be described one by one here.

[0090] Fig.10 The structure diagram of the reflector leveling module 2 provided in the present application is shown. Fig.10 Combination Figure 1 As shown, the reflector leveling module 2 includes a leveling platform 21 and a leveling mechanism 22. Three leveling mechanisms 22 are installed on the lifting platform 121 and arranged in an equilateral triangle. The output end of each leveling mechanism 22 is connected to the leveling platform 21 and is used to adjust the horizontal posture of the leveling platform 21.

[0091] The leveling platform 21 includes a frame 211 and a mounting seat 212, three mounting seats 212 are fixed on the frame 211 at intervals, and the three mounting seats 212 are connected to the output ends of the three leveling mechanisms 22 in a one-to-one correspondence. In this embodiment, the frame 211 is in a square shape, and the leveling platform 21 also includes fixed arms 215, and the three fixed arms 215 are fixed to three adjacent sides of the frame 211, wherein the extension lines of two fixed arms 215 overlap, and the extension line of the third fixed arm 215 is perpendicular to the extension lines of the two fixed arms 215, so as to realize three-point constraint positioning of the reflector 3. Of course, in other embodiments, the number of fixed arms 215 can also be four, so as to realize four-point constraint positioning of the reflector 3.

[0092] Furthermore, the reflector 3 is circular in shape, and a beam hole 1131 is provided on the crossbeam 113 . The center of the beam hole 1131 and the center of the reflector 3 are located on the same vertical line.

[0093] Fig.11 Shows Fig.10 Schematic diagram of the structure of the middle leveling mechanism 22. Fig.12 Shows Fig.11 A partial cross-sectional schematic diagram of the leveling mechanism 22. Figure 11 to Figure 12 As shown, the leveling mechanism 22 includes a ball joint assembly 221 and a leveling drive assembly 222. The leveling drive assembly 222 is fixedly connected to the lifting platform 121 of the lifting module 1 through the ball joint assembly 221, and the output end of the leveling drive assembly 222 is connected to the leveling platform 21 and can be lifted and lowered relative to the lifting platform 121.

[0094] The ball joint assembly 221 includes a ball joint seat 2211 and a ball head 2212. The ball joint seat 2211 is fixed to the lifting platform 121, and the ball joint seat 2211 has a spherical groove and an opening connected to the spherical groove. The ball head 2212 includes a connecting portion 22121 and a spherical portion 22122. The spherical portion 22122 cooperates with the spherical groove, and the connecting portion 22121 extends out of the ball joint seat 2211 through the opening. Such an arrangement can prevent the three leveling mechanisms 22 from deforming the leveling platform 21 and the reflector 3 due to the telescopic action of the output end of the leveling drive assembly 222 during the process of adjusting the horizontal posture of the leveling platform 21.

[0095] The ball joint seat 2211 includes a fixed seat 22111, a first cover plate 22112 and a second cover plate 22113. The fixed seat 22111 is fixed to the lifting platform 121. The first cover plate 22112 and the second cover plate 22113 are symmetrically arranged and are both detachably connected to the fixed seat 22111. The first cover plate 22112, the second cover plate 22113 and the fixed seat 22111 cooperate to form a spherical groove. The first cover plate 22112 and the second cover plate 22113 cooperate to form an opening. Such an arrangement can facilitate the assembly of the ball joint seat 2211 and the ball head 2212, thereby improving the assembly efficiency. Furthermore, the fixed seat 22111 can be detachably fixed to the lifting platform 121, which can facilitate the disassembly and assembly of the reflector leveling module 2 and the lifting platform 121, thereby improving the disassembly and assembly efficiency of the equipment.

[0096] The ball joint assembly 221 further includes a sleeve 2213 , the connecting portion 22121 is detachably fixedly connected to the sleeve 2213 , and the sleeve 2213 extends in a vertical direction, and the output end of the leveling drive assembly 222 can be raised and lowered relative to the sleeve 2213 .

[0097] The leveling drive assembly 222 includes a leveling drive 2221 and a lifting member 2222. The lifting member 2222 is sleeved outside the sleeve 2213 and fixedly connected to the leveling platform 21. The leveling drive 2221 is installed on the sleeve 2213 and is used to drive the lifting member 2222 to rise and fall relative to the sleeve 2213. Among them, the leveling drive 2221 is a servo motor. In this embodiment, the leveling drive assembly 222 also includes a screw nut transmission assembly, and the leveling drive 2221 realizes the lifting and falling of the lifting member 2222 relative to the sleeve 2213 through the screw nut transmission assembly. In other embodiments, the leveling drive assembly 222 also includes a worm gear transmission assembly, and the leveling drive 2221 realizes the lifting and falling of the lifting member 2222 relative to the sleeve 2213 through the worm gear transmission assembly. It can be understood that as long as the transmission assembly can realize the conversion of the rotational motion of the leveling drive 2221 into the linear lifting motion of the lifting member 2222, it can be used, and no examples are given here.

[0098] In order to realize the connection between the leveling platform 21 and the lifting member 2222, the leveling platform 21 also includes a connecting assembly, which includes a first connecting member 213 and a second connecting member 214. The first connecting member 213 is fixed on the mounting seat 212. The first connecting member 213 and the second connecting member 214 cooperate to form a accommodating cavity for accommodating the lifting member 2222, and then the second connecting member 214 is detachably fixedly connected to the first connecting member 213 through a screw nut.

[0099] Furthermore, the lifting member 2222 has an anti-rotation protrusion 22221 extending in the vertical direction, and the accommodating cavity has an anti-rotation recess that cooperates with the anti-rotation protrusion 22221 to prevent the mounting seat 212 from rotating relative to the lifting member 2222, thereby ensuring that the mounting seat 212 and the lifting member 2222 are lifted and lowered synchronously.

[0100] In this embodiment, the leveling mechanism 22 and the dual-axis tilt sensor 41 adopt the simplest design of discrete components, which can make the total weight of the reflector leveling module 2 reach 8kg or less. Since the overall weight of the reflector leveling module 2 is relatively light, during the process of the lifting module 1 driving the reflector leveling module 2 and the reflector 3 to rise and fall, the horizontal component force generated by gravity in the reflector leveling module 2 is very small, so the column 112 is basically not affected by the horizontal force, so that the column 112 does not need to adopt a steel structure, and can be made of light aluminum or lighter carbon fiber material, and the number of columns 112 is maintained at two to meet the demand, which greatly reduces the overall weight of the lifting module 1. In addition, after the rack leveling assembly 13 roughly levels the base 111, since the pulling force of the wire rope 1223 on the lifting platform 121 is the internal force of the system, the center of gravity position of the entire on-site level simulation device basically does not change, and there is no risk of overturning. Therefore, there is no need to add counterweights to move the center of gravity downward, which further reduces the weight of the lifting module 1. The weight of the lifting module 1 can reach 25kg.

[0101] The present application also provides an on-site in-situ calibration method for a level meter, based on the above-mentioned on-site level simulation device, the level meter is specifically a spatial reflective level meter, and its on-site in-situ calibration method includes an equipment assembly step and an in-situ calibration step. In short, in the application, the on-site level simulation device is carried to the site to be measured, and then the on-site level simulation device is assembled, and the corresponding spatial reflective level meter and length standards such as laser interferometers are installed, and then the in-situ calibration operation of the spatial reflective level meter is performed.

[0102] Fig.13 The schematic diagram of the installation position of the spatial reflective level meter and the on-site level simulation device provided in the embodiment of the present application is shown. Fig.13 As shown, the equipment assembly steps include: assembling the on-site level simulation device; installing the spatial reflective level meter at H1 above the beam 113, and making the center of the antenna aperture surface of the spatial reflective level meter and the center of the beam hole 1131 on the same vertical line; installing the laser interferometer at the center of the bottom of the reflector 3. Since there is no obstruction between the lower surface of the reflector 3 and the control module 42, installing the laser interferometer and other length standards at the bottom of the reflector 3 can eliminate beam shielding and clutter interference.

[0103] In this embodiment, The diameter of the reflector 3 Wherein, D1 is the diameter of the beam hole 1131; θ is the beam angle of the spatial reflective level meter 100; H max It is the distance between the reflection plate 3 and the spatial reflective level meter 100 when the spatial reflective level meter 100 is at the maximum calibration height.

[0104] The in-situ calibration step includes: raising and lowering the lifting platform 121 to the required height, then adjusting the horizontal posture of the reflector 3, and making the center of the reflector 3, the center of the beam hole 1131 and the center of the antenna aperture surface of the spatial reflective level meter collinear, thereby achieving the construction of a standard one-dimensional ranging environment on site and improving the accuracy of the in-situ calibration results on site.

[0105] Fig.14 FIG. 2 shows a schematic diagram of a reflector plate leveling module 2 provided in an embodiment of the present application. Fig.14 As shown, adjusting the horizontal posture of the reflector 3 includes the following steps:

[0106] The intersections of the three leveling mechanisms 22 and the leveling platform 21 are respectively marked as point A, point B, and point C, wherein the line between point A and point B is marked as the first axis, the line between point A and point C is marked as the second axis, the angle between the first axis and the horizontal plane is α, and the angle between the second axis and the horizontal plane is β;

[0107] The dual-axis tilt sensor 41 detects the values ​​of α and β;

[0108] Determine the highest point among points A, B, and C based on α and β;

[0109] If point A is the highest, first make the leveling mechanism 22 corresponding to point B drive the leveling platform 21 to rise until α is less than 0.01°, then make the leveling mechanism 22 corresponding to point C drive the leveling platform 21 to rise until β is less than 0.01°, and finally lock all the leveling mechanisms 22;

[0110] If point B is the highest, first make the leveling mechanism 22 corresponding to point A drive the leveling platform 21 to rise until α is less than 0.01°, then make the leveling mechanism 22 corresponding to point C drive the leveling platform 21 to rise until β is less than 0.01°, and finally lock all the leveling mechanisms 22;

[0111] If point C is the highest, first the leveling mechanism 22 corresponding to point A drives the leveling platform 21 to rise until β is less than 0.01°, then the leveling mechanism 22 corresponding to point B drives the leveling platform 21 to rise until α is less than 0.01°, and finally all the leveling mechanisms 22 are locked.

[0112] In order to conveniently explain the adjustment steps for adjusting the horizontal posture of the reflector 3, the adjustment mechanism corresponding to point A is recorded as the first adjustment mechanism, the adjustment mechanism corresponding to point B is recorded as the second adjustment mechanism, and the adjustment mechanism corresponding to point C is recorded as the third adjustment mechanism.

[0113] Fig.15 FIG. 2 shows a schematic diagram of a process for adjusting the horizontal posture of the reflector 3 provided in an embodiment of the present application. Fig.15 Combination Fig.14 As shown, when α<0, β<0, point A is the highest, and the control module 42 outputs a driving signal to the first leveling mechanism 22a, the second leveling mechanism 22b and the third leveling mechanism 22c, keeping the first leveling mechanism 22a and the third leveling mechanism 22c stationary, and the lifting member 2222 of the second leveling mechanism 22b rises a certain displacement, that is, the reflector 3 rotates around the second axis, and its rising displacement is determined by the α measurement value until α is less than 0.01°, at which time the first axis is in a horizontal state. After the first axis is in a horizontal state, the control module 42 outputs a driving signal to the first leveling mechanism 22a, the second leveling mechanism 22b and the third leveling mechanism 22c, keeping the first leveling mechanism 22a and the second leveling mechanism 22b stationary, and the lifting member 2222 of the third leveling mechanism 22c rises a certain displacement, that is, the reflector 3 rotates around the first axis, and its rising displacement is determined by the β measurement value until β is less than 0.01°, at which time the second axis is in a horizontal state. When the first axis and the second axis are both in a horizontal state, the three leveling mechanisms 22 are locked. Similarly, when point B is the highest or point C is the highest, the above control method can be referred to, and no further description is given here.

[0114] It should be noted that after the control module 42 collects the detection results of the dual-axis tilt sensor 41, it adopts a closed-loop control algorithm aligned with the highest point, calculates the highest point position, and outputs a driving signal to control the corresponding leveling mechanism 22 to drive the leveling platform 21 to rise and fall until the leveling platform 21 is in a horizontal state, and then locks the leveling mechanism 22. The closed-loop control algorithm aligned with the highest point has simple control logic and strong robustness. Since the lifting platform 121 is very stable during the lifting and lowering movement, there is no need to perform large-angle leveling, and the leveling time is short. It only takes a dozen seconds to complete a leveling. Under the condition of the same number of calibration points, the in-situ calibration time of the spatial reflective level meter can be greatly shortened.

[0115] The above shows and describes the basic principles, main features and advantages of the present application. Those skilled in the art should understand that the above embodiments do not limit the present application in any form, and any technical solution obtained by equivalent replacement or equivalent transformation falls within the protection scope of the present application.

Claims

1. A field level simulation device for on-site in-situ calibration of a spatial reflective level meter, characterized in that: The on-site level simulation device comprises: A lifting module (1) comprises a frame (11) and a lifting mechanism (12), wherein the lifting mechanism (12) comprises a lifting platform (121) capable of being lifted and lowered relative to the frame (11); A reflector plate leveling module (2), comprising a leveling platform (21) and a leveling mechanism (22), wherein three leveling mechanisms (22) are mounted on the lifting platform (121) and arranged in an equilateral triangle, and an output end of each leveling mechanism (22) is connected to the leveling platform (21) and is used to adjust the horizontal posture of the leveling platform (21); A reflective plate (3) fixed to the leveling platform (21); A control system comprises a control module (42) and a dual-axis tilt sensor (41), wherein the dual-axis tilt sensor (41) is mounted on the reflector (3), and the control module (42) can control the leveling mechanism (22) to adjust the horizontal posture of the leveling platform (21) according to the detection result of the dual-axis tilt sensor (41).

2. The on-site level simulation device according to claim 1, characterized in that: The leveling mechanism (22) comprises a ball joint assembly (221) and a leveling drive assembly (222); the leveling drive assembly (222) is fixedly connected to the lifting platform (121) via the ball joint assembly (221); an output end of the leveling drive assembly (222) is connected to the leveling platform (21) and can be raised and lowered relative to the lifting platform (121).

3. The on-site level simulation device according to claim 2, characterized in that: The ball joint assembly (221) includes a ball joint seat (2211) and a ball head component (2212); the ball joint seat (2211) is fixed to the lifting platform (121), and the ball joint seat (2211) has a spherical groove and an opening connected to the spherical groove; the ball head component (2212) includes a connecting portion (22121) and a spherical portion (22122); the spherical portion (22122) cooperates with the spherical groove; the connecting portion (22121) extends through the opening to the outside of the ball joint seat (2211) and is used to install the leveling drive assembly (222).

4. The on-site level simulation device according to claim 1, characterized in that: The lifting module (1) further comprises an anti-sway mechanism (14); the frame (11) comprises a base (111) and at least two columns (112) fixed to the base (111); the anti-sway mechanism (14) is provided on a side of the lifting platform (121) opposite to the columns (112); each anti-sway mechanism (14) is in sliding and rolling cooperation with the corresponding column (112).

5. The on-site level simulation device according to claim 4, characterized in that: The anti-sway mechanism (14) comprises a bracket (141), a sliding member (142) and a rolling assembly (143); the bracket (141) is fixed to a lifting platform (121); the sliding member (142) and the rolling assembly (143) are both fixed to the bracket (141); the column (112) has a slide groove (1121) which is slidably matched with the sliding member (142) and extends in a vertical direction; and the ball (1432) of the rolling assembly (143) abuts against the column (112).

6. The on-site level simulation device according to claim 4, characterized in that: The lifting module (1) further comprises a rack leveling component (13), the rack leveling component (13) comprising a fixing member (131) and a lifting support member (132), the fixing member (131) being fixed on the base (111), the lifting support member (132) being threadedly connected to the fixing member (131) and extending in a vertical direction, and the bottom of the lifting support member (132) being capable of abutting against a placement surface of the base (111); at least three rack leveling components (13) are evenly spaced and arranged, and are used to adjust the horizontal posture of the base (111).

7. A method for on-site in-situ calibration of a level meter, characterized in that: Based on the on-site level simulation device according to any one of claims 1 to 6, the on-site in-situ calibration method of the level meter comprises the following steps: Equipment assembly: assembling the on-site level simulation device; installing a spatial reflective level meter at a position H1 above the crossbeam (113) of the frame (11), and making the center of the antenna aperture surface of the spatial reflective level meter and the center of the beam hole (1131) of the crossbeam (113) be located on the same vertical line; installing a laser interferometer at the center position of the bottom of the reflector (3); In-situ calibration: the lifting platform (121) is lifted to a required height, and then the horizontal posture of the reflecting plate (3) is adjusted, and the center of the reflecting plate (3), the center of the beam hole (1131), and the center of the antenna aperture surface of the spatial reflective level meter are aligned.

8. The on-site in-situ calibration method of a level meter according to claim 7, characterized in that: Adjusting the horizontal posture of the reflecting plate (3) comprises the following steps: The intersections of the three leveling mechanisms (22) and the leveling platform (21) are respectively marked as point A, point B, and point C, wherein the line between point A and point B is marked as the first axis, the line between point A and point C is marked as the second axis, the angle between the first axis and the horizontal plane is α, and the angle between the second axis and the horizontal plane is β; The dual-axis tilt sensor (41) detects the values ​​of α and β; Determine the highest point among points A, B, and C based on α and β; If point A is the highest, first the leveling mechanism (22) corresponding to point B drives the leveling platform (21) to rise until α is less than 0.01°, then the leveling mechanism (22) corresponding to point C drives the leveling platform (21) to rise until β is less than 0.01°, and finally all the leveling mechanisms (22) are locked; If point B is the highest, first the leveling mechanism (22) corresponding to point A drives the leveling platform (21) to rise until α is less than 0.01°, then the leveling mechanism (22) corresponding to point C drives the leveling platform (21) to rise until β is less than 0.01°, and finally all the leveling mechanisms (22) are locked; If point C is the highest, the leveling mechanism (22) corresponding to point A is first driven to raise the leveling platform (21) until β is less than 0.01°, and then the leveling mechanism (22) corresponding to point B is driven to raise the leveling platform (21) until α is less than 0.01°, and finally all the leveling mechanisms (22) are locked.

9. The on-site in-situ calibration method of a level meter according to claim 7, characterized in that: Wherein, D1 is the diameter of the beam hole (1131), and θ is the beam angle of the spatial reflective level meter.

10. The on-site in-situ calibration method of a level meter according to claim 9, characterized in that: The diameter of the reflecting plate (3) Among them, H max It is the distance between the reflection plate (3) and the spatial reflective level meter (100) when the spatial reflective level meter (100) is at the maximum calibration height.

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