Vector sensor corrector horizontal verification method and auxiliary tool

Abstract

The invention discloses a vector sensor corrector horizontal verification method and an auxiliary tool, and belongs to the technical field of helicopter part verification equipment calibration. A small end support block; the two transverse horizontal adjusting bolts are arranged on the two sides of the large-end supporting block respectively; the longitudinal horizontal adjusting bolt is connected to the lower part of the small-end supporting block; the two transverse horizontal adjusting support legs are respectively connected with the two transverse horizontal adjusting bolts; the longitudinal horizontal adjusting support leg is connected with the longitudinal horizontal adjusting bolt; the two ends of the connecting rod are connected with the large-end supporting block and the small-end supporting block respectively, so that the inclination angle of the large-end supporting block is matched with the inclination angle of the small-end supporting block; by controlling and adjusting the transverse horizontal adjusting support leg and the longitudinal horizontal adjusting support leg, the reference plane of the vector sensor corrector is quickly aligned, the gradienter is accurately leveled, and high-precision calibration of the horizontal parameters of the vector sensor corrector is realized.

Description

Technical Field

[0001] The present invention relates to the technical field of calibration of helicopter component calibration equipment, and more specifically, to a horizontal calibration method and auxiliary tooling for a vector sensor corrector. Background Art

[0002] In the overhaul work of helicopters, the level of the vector sensor mounting bracket of helicopter components is debugged and accepted by means of a vector sensor corrector to meet the process requirements; to ensure the accuracy of the horizontal state of the vector sensor mounting bracket, it is necessary to first ensure the accuracy of the metrological performance of the detection tooling vector sensor corrector; since the reference plane of the vector sensor corrector is located on the cylindrical surface and parallel to the cylindrical axis, if the cylindrical surface drives the reference plane to rotate circumferentially, the level of the reference plane cannot be determined.

[0003] In the related art, jacks and mandrels are usually used for auxiliary support, and the calibration work of the vector sensor corrector is completed by combining the dial indicator method. However, the above methods have the following technical problems:

[0004] 1. When leveling the reference plane of the vector sensor corrector, the existing calibration method can only achieve the longitudinal level calibration of the vector sensor corrector by adjusting the jack, but cannot complete the horizontal calibration in the transverse direction, thus unable to achieve the precise alignment of the reference plane, ultimately affecting the level calibration result of the tooling and introducing a large measurement uncertainty;

[0005] 2. The existing calibration method requires repeated operations to gradually approach the horizontal of the reference plane, resulting in low labor efficiency.

[0006] In summary, the existing inspection methods and devices have technical defects such as low reliability, poor accuracy, low efficiency, and high quality risks. Summary of the Invention

[0007] The purpose of the present invention is to solve the technical problem that it is difficult to accurately level the reference plane when calibrating a vector sensor corrector with existing equipment, and to propose a horizontal calibration method and auxiliary tooling for a vector sensor corrector.

[0008] To achieve the above purpose, the present invention adopts the following technical solutions:

[0009] The first aspect of the present invention provides a horizontal calibration auxiliary tooling for a vector sensor corrector, including:

[0010] A large-end support block, with flange plates provided on both sides of the large-end support block;

[0011] A small-end support block, which cooperates with the large-end support block to jointly carry the measured part;

[0012] Two horizontal adjustment bolts, and the two horizontal adjustment bolts are respectively connected to the lower sides of the two flange plates;

[0013] A longitudinal horizontal adjustment bolt, and the longitudinal horizontal adjustment bolt is connected to the lower side of the small end support block;

[0014] Two horizontal adjustment feet, and the two horizontal adjustment feet are respectively threadedly connected to the two horizontal adjustment bolts, and are used for adjusting the height and inclination angle of the large end support block;

[0015] A longitudinal horizontal adjustment foot, and the longitudinal horizontal adjustment foot is threadedly connected to the longitudinal horizontal adjustment bolt, and is used for adjusting the height of the small end support block;

[0016] A connecting rod, and two ends of the connecting rod are respectively connected to the large end support block and the small end support block, and the connecting rod is used for transmitting the position change of any one end thereof to the other end, so that the inclination angles of the large end support block and the small end support block are kept matched.

[0017] Further, a large end V-shaped groove with an upward opening is arranged on the large end support block, and the large end V-shaped groove is used for horizontally limiting the part of the measured piece located above the large end support block; a small end V-shaped groove with an upward opening is arranged on the small end support block, and the small end V-shaped groove is used for horizontally limiting the part of the measured piece located above the small end support block.

[0018] Further, a pressing plate is detachably arranged at the upper end of the small end support block, and the pressing plate is used for cooperating with the small end V-shaped groove to tightly press the measured piece.

[0019] Further, the bottom ends of the horizontal adjustment feet and the longitudinal adjustment feet are both arranged as arc-shaped surfaces.

[0020] In a second aspect of the present invention, a method for horizontally calibrating a vector sensor corrector is provided, and a horizontal calibration auxiliary tool for a vector sensor corrector described in the first aspect is adopted, including the following steps:

[0021] Step S1: Align the reference plane of the vector sensor corrector, and measure and obtain the horizontal degree value of the vector sensor corrector;

[0022] Step S2: Repeat step S1 for several times to obtain a horizontal degree data set of the vector sensor corrector;

[0023] Step S3: According to the horizontal degree data set of the vector sensor corrector, calculate and obtain the best estimated value X of the measured horizontal degree of the vector sensor corrector;

[0024] Step S4: Evaluate the measurement uncertainty U of the level of the vector sensor corrector according to the level dataset of the vector sensor corrector;

[0025] Step S5: Obtain the level verification result L of the vector sensor corrector.

[0026] Further, in Step S1, the step of aligning the reference plane of the vector sensor corrector includes:

[0027] Step S101: Clamp the vector sensor corrector and roughly level the reference plane of the vector sensor corrector;

[0028] Step S102: Measure and obtain the lateral adjustment height value and the longitudinal adjustment height value of the reference plane of the vector sensor corrector;

[0029] Step S103: Precisely level the reference plane of the vector sensor corrector according to the lateral adjustment height value and the longitudinal adjustment height value;

[0030] Step S104: Level the lateral level and the longitudinal level on the reference plane of the vector sensor corrector.

[0031] Further, in Step S4, the step of evaluating the measurement uncertainty U of the level of the vector sensor corrector includes:

[0032] Step S401: Evaluate the uncertainty component u1 introduced by measurement repeatability; evaluate the uncertainty component u2 introduced by the measurement standard; evaluate the uncertainty component u3 introduced by the estimation of positioning error; evaluate the uncertainty component u4 introduced by the measurement method;

[0033] Step S402: Evaluate the combined standard uncertainty u according to the uncertainty component u1 introduced by measurement repeatability, the uncertainty component u2 introduced by the measurement standard, the uncertainty component u3 introduced by the estimation of positioning error, and the uncertainty component u4 introduced by the measurement method c ;

[0034] Step S403: Evaluate the measurement uncertainty U of the level of the vector sensor corrector according to the combined standard uncertainty u c ;

[0035] Further, in Step S5, the level verification result L of the vector sensor corrector is L = X ± U;

[0036] Where: X is the best estimated value of the measured level of the vector sensor corrector, in millimeters; U is the measurement uncertainty of the level of the vector sensor corrector, in millimeters.

[0037] The beneficial effects of the present invention are as follows: The present application provides a horizontal calibration auxiliary tooling for a vector sensor corrector. By controlling and adjusting the horizontal adjustment feet in the transverse direction and the longitudinal direction, the reference plane of the vector sensor corrector can be quickly aligned, and the level can be accurately leveled, realizing high-precision calibration of the horizontal parameters of the vector sensor corrector, thereby improving the assembly quality of the subsequent vector sensor mounting bracket and ensuring flight safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 FIG. is a schematic diagram of the overall structure of a horizontal calibration auxiliary tooling for a vector sensor corrector provided in an embodiment of the present invention;

[0039] Figure 2 FIG. is a schematic diagram of the positional relationship between a horizontal calibration auxiliary tooling for a vector sensor corrector and the vector sensor corrector provided in an embodiment of the present invention;

[0040] Figure 3 FIG. is a schematic diagram of the structure of a horizontal adjustment bolt in the transverse direction in an embodiment of the present invention;

[0041] The markings in the figure are shown as follows:

[0042] 1. Large-end support block;

[0043] 11. Flange plate; 12. Large-end V-shaped groove; 13. Weight-reducing hole;

[0044] 2. Small-end support block;

[0045] 21. Small-end V-shaped groove; 22. Pressure plate;

[0046] 3. Horizontal adjustment bolt in the transverse direction;

[0047] 31. Smooth round section; 32. Threaded section; 33. Limit ring;

[0048] 4. Horizontal adjustment bolt in the longitudinal direction; 5. Horizontal adjustment foot in the transverse direction; 6. Horizontal adjustment foot in the longitudinal direction; 7. Connecting rod;

[0049] 8. Vector sensor corrector; 81. Large cylinder; 82. Small cylinder; 83. Reference plane; 84. Longitudinal level; 85. Transverse level; 86. Fine adjustment screw. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0050] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.

[0051] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship, movement conditions, etc. between components in a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0052] In the present invention, unless otherwise clearly defined and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal connection of two components or the interaction relationship between two components, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0053] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and / or" appearing throughout the text includes three parallel scenarios. Taking "A and / or B" as an example, it includes scenario A, scenario B, or the scenario where both A and B are satisfied simultaneously. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present invention.

[0054] It should be noted that if the vector sensor corrector 8 receives incorrect signals, that is, the unqualified tooling is qualified through inspection, and the unqualified vector sensor corrector 8 is used during subsequent debugging and acceptance of the vector sensor mounting bracket for components, it will cause incorrect acceptance and rejection of the vector sensor mounting bracket, increasing the quality risk. The vector sensor corrector 8 has an overall multi-stage columnar structure, and its diameter changes gradually. The main structure of the vector sensor corrector 8 adopted in the embodiment of this solution includes: a large cylinder 81 at one end, a small cylinder 82 at the other end, a reference plane 83 on the cylindrical surface of the large cylinder 81, a longitudinal level 84 and a transverse level 85 on the reference plane 83, and fine-tuning screws 86 at both ends of the longitudinal level 84 and both ends of the transverse level 85. Among them, a transverse inner hole penetrating the cylindrical surface is provided on the large cylinder 81, and the axis of the transverse inner hole is parallel to the reference plane 83. A longitudinal inner hole penetrating the end faces of the large cylinder 81 and the small cylinder 82 is also provided on the vector sensor corrector 8, and the axis of the longitudinal inner hole is parallel to the reference plane 83 and perpendicular to the axis of the transverse inner hole. The principle of the vector sensor corrector 8 is to use the transverse level 85 and the longitudinal level 84 to present the actual horizontal state of the reference plane 83, thereby indirectly presenting the true horizontal states of the axes of the transverse inner hole and the longitudinal inner hole. When using the vector sensor corrector 8 to detect and debug the levelness of the vector sensor mounting bracket, it is only necessary to observe whether the bubbles in the transverse level 85 and the longitudinal level 84 are centered to determine whether the levelness of the vector sensor mounting bracket meets the process requirements. The design of the vector sensor corrector 8 quantifies the levelness of the reference plane 83 onto the visible transverse level 85 and longitudinal level 84, providing an accurate and reliable reference basis for the installation, debugging, and detection of the vector sensor mounting bracket.

[0055] Please refer to Figures 1 to 3 The embodiment of the present application shown provides a vector sensor corrector level verification auxiliary tooling. In practical applications, the vector sensor corrector level verification auxiliary tooling is used to verify and align the reference plane 83 of the vector sensor corrector 8. When the reference plane 83 is in a leveled state, the bubbles in the transverse level 85 and the longitudinal level 84 are both in the centered position, thereby achieving accurate verification of the levelness of the vector sensor corrector 8. The vector sensor corrector level verification auxiliary tooling in this embodiment is placed on an inspection platform, and the inspection platform grade is above level 1. For ease of description, hereinafter, the "vector sensor corrector 8" is collectively referred to as the "test piece", and the "vector sensor corrector level verification auxiliary tooling" is collectively referred to as the "level verification auxiliary tooling".

[0056] The horizontal calibration auxiliary tooling includes: a large-end support block 1, a small-end support block 2, a transverse horizontal adjustment bolt 3, a longitudinal horizontal adjustment bolt 4, a transverse horizontal adjustment support foot 5, a longitudinal horizontal adjustment support foot 6, and a connecting rod 7; among them, the large-end support block 1 is integrally of a rectangular block structure, and flange plates 11 are respectively arranged on the two side walls thereof. The flange plates 11 are close to the bottom surface of the large-end support block 1, the plate surfaces of the flange plates 11 are horizontally arranged, and first connection holes for connecting the transverse horizontal adjustment bolt 3 are opened on the plate surfaces. The design purpose of the flange plates 11 is to provide an installation position for the transverse horizontal adjustment bolt 3 on both sides of the large-end support block 1.

[0057] The small-end support block 2 is integrally of a rectangular block structure. The small-end support block 2 and the large-end support block 1 are arranged in parallel and cooperate to carry the workpiece to be measured above; a second connection hole for connecting the longitudinal horizontal adjustment bolt 4 is provided at the center position of the lower surface of the small-end support block 2.

[0058] In order to better limit and fix the workpiece to be measured and prevent the workpiece to be measured from rolling and sliding off above the large-end support block 1 and the small-end support block 2; in the above technical solution, a large-end V-shaped groove 12 is provided on the large-end support block 1. The large-end V-shaped groove 12 opens upward and is used to carry the large cylinder 81 structure on the workpiece to be measured; a small-end V-shaped groove 21 is provided on the small-end support block 2. The small-end V-shaped groove 21 opens upward and is used to carry the small cylinder 82 structure on the workpiece to be measured; when the workpiece to be measured is placed on the large-end support block 1 and the small-end support block 2, the inclined surface of the large-end V-shaped groove 12 contacts the two side cylindrical surfaces of the large cylinder 81 and provides an inclined support, and the inclined surface of the small-end V-shaped groove 21 contacts the two side cylindrical surfaces of the small cylinder 82 and provides an inclined support, so that the contact element feature between the workpiece to be measured and the horizontal calibration auxiliary tooling is four straight lines, thereby playing a role in laterally limiting the workpiece to be measured.

[0059] Please refer to Figure 3 , in this embodiment, the transverse horizontal adjustment bolt 3 and the longitudinal horizontal adjustment bolt 4 have the same structure and are both semi-threaded bolts; among them, one end of the transverse horizontal adjustment bolt 3 is a smooth round section 31, and the other end is a threaded section 32. A limit ring 33 is arranged between the smooth round section 31 and the threaded section 32 for separation; in practical applications, the smooth round sections 31 of the two transverse horizontal adjustment bolts 3 are respectively inserted into the first connection holes on the two flange plates 11, and the limit ring 33 is limited and abutted against the lower surface of the flange plate 11, so that the threaded section 32 is located below the flange plate 11; it can be understood that the longitudinal horizontal adjustment bolt 4 is connected to the second connection hole on the lower surface of the small-end support block 2 in the same way.

[0060] The horizontal adjustment feet 5 and the vertical adjustment feet 6 have the same structure and are both columnar. On the upper end face of the horizontal adjustment feet 5, there are screw holes adapted to the horizontal adjustment bolts 3. The two horizontal adjustment feet 5 are respectively threadedly connected to the threaded sections 32 of the two horizontal adjustment bolts 3 through the screw holes. In practical applications, by screwing the horizontal adjustment feet 5, the depth of the horizontal adjustment bolts 3 in the screw holes can be changed, thereby changing the ground clearance height of the corresponding side flange plates 11. Further, by cooperating to control the two horizontal adjustment feet 5, the overall height and the overall inclination angle of the large-end support block 1 can be adjusted.

[0061] On the upper end face of the vertical adjustment feet 6, there are screw holes adapted to the vertical adjustment bolts 4. The vertical adjustment feet 6 are threadedly connected to the threaded sections 32 of the vertical adjustment bolts 4 through the screw holes. Similarly, in practical applications, by screwing the vertical adjustment feet 6, the overall height of the small-end support block 2 can be adjusted.

[0062] In order to enable the horizontal calibration auxiliary tooling to be stably placed on the inspection platform and enable the associated movement between the large-end support block 1 and the small-end support block 2, a third connection hole is provided on the large-end support block 1, and a fourth connection hole is provided on the small-end support block 2. The two ends of the connecting rod 7 are respectively connected to the third connection hole and the fourth connection hole, thereby connecting the large-end support block 1 and the small-end support block 2 to form an integral body. Through the design of the connecting rod 7, the horizontal calibration auxiliary tooling forms a stable triangular support with the two horizontal adjustment feet 5 and one vertical adjustment foot 6, and can stably carry the workpiece to be measured for calibration. In this embodiment, the connecting rod 7 is a long rod with an elliptical longitudinal section to prevent the connecting rod 7 from circumferentially sliding in the third connection hole and the fourth connection hole and relative rotation with the large-end support block 1 and the small-end support block 2. It can be understood that the connecting rod 7 can also adopt other long rod structures such as rectangular strips that will not produce relative rotation with the large-end support block 1 and the small-end support block 2. In the above technical solution, the connecting rod 7 is used to transfer the position change of any one end to the other end, so that the inclination angles of the large-end support block 1 and the small-end support block 2 are kept matching, that is, when the height or inclination angle of the large-end support block 1 or the small-end support block 2 changes, the overall posture of the horizontal calibration auxiliary tooling will also change synchronously. In practical applications, by screwing any one of the horizontal adjustment feet 5 to change the height on both sides of the large-end support block 1, the overall horizontal level of the horizontal calibration auxiliary tooling can be adjusted. By screwing the vertical adjustment feet 6 alone to change the height between the large-end support block 1 and the small-end support block 2, the overall longitudinal level of the horizontal calibration auxiliary tooling can be adjusted, thereby driving the workpiece to be measured carried above for quick alignment, and solving the technical problem that it is difficult to complete the horizontal calibration of the workpiece to be measured in the transverse direction by the existing calibration methods.

[0063] In order to better limit and fix the measured part in the vertical direction and lock the measured part in the large-end V-shaped groove 12 and the small-end V-shaped groove 21 to prevent it from rotating randomly; in the above technical solution, a pressing plate 22 is arranged at the upper end of the small-end support block 2, and screw holes with matching quantities are arranged at corresponding positions on the plate surface of the pressing plate 22 and the small-end support block 2. The pressing plate 22 is detachably connected to the small-end support block 2 through bolts and is located directly above the small-end V-shaped groove 21; in actual application, after the small cylinder 82 is placed in the small-end V-shaped groove 21, the pressing plate 22 is installed, and the small cylinder 82 is tightly pressed by the lower surface of the pressing plate 22 and the two inclined surfaces of the small-end V-shaped groove 21, so as to realize the limit and fixation of the measured part in the horizontal and vertical directions, and solve the technical problem that the measured part is prone to shaking during the calibration process.

[0064] As a preferred embodiment of the present application, the bottom ends of the horizontal lateral adjustment feet 5 and the horizontal longitudinal adjustment feet 6 are both provided with arc-shaped surfaces; the purpose of using the arc-shaped surface design is to reduce the contact area between the horizontal lateral adjustment feet 5, the horizontal longitudinal adjustment feet 7 and the inspection platform, so that the horizontal calibration auxiliary tooling and the inspection platform always maintain stable three-point contact, which can effectively avoid the situation that the other feet tilt due to angle change and the bottom force is uneven and shake after adjusting one foot; and with the arc-shaped surface design, the contact form between the feet and the inspection platform will not change during the horizontal degree adjustment, which can ensure the stability and flexibility of the adjustment state.

[0065] As a preferred embodiment of the present application, a plurality of weight-reducing holes 13 are provided on the large-end support block 1; the weight-reducing holes 13 are used to reduce the weight of the large-end support block 1, which is convenient for the disassembly, installation and transfer of the horizontal calibration tooling.

[0066] When calibrating the measured part, first place the large cylinder 81 of the measured part in the large-end V-shaped groove 12 and the small cylinder 82 in the small-end V-shaped groove 21; rotate and adjust the measured part to make the reference plane 83 on the large cylinder 81 in a roughly horizontal state; after pressing and fixing the small cylinder 82 of the measured part in the small-end V-shaped groove 21 through the pressing plate 22, use the measuring equipment to measure the height value that the measured part needs to be adjusted currently, control the horizontal lateral adjustment feet 5 to adjust the horizontal degree of the reference plane 83 in the horizontal direction, control the horizontal longitudinal adjustment feet 6 to adjust the horizontal degree of the reference plane 83 in the longitudinal direction, and complete the alignment of the reference plane 83; finally, control the fine adjustment screw 86 to adjust the bubbles of the longitudinal level 84 and the horizontal level 85 to the center position; complete the calibration of the measured part.

[0067] In view of the situation that it is difficult to accurately level the reference plane 83 on the vector sensor corrector 8, which affects the accuracy of its horizontal calibration, resulting in mis-receipt and mis-rejection of products, this application provides an auxiliary tool for horizontal calibration of the vector sensor corrector. By controlling and adjusting the lateral horizontal adjustment feet 5 and the longitudinal horizontal adjustment feet 6, the reference plane 83 of the vector sensor corrector 8 is quickly aligned, the level is accurately leveled, and the high-precision calibration of the horizontal parameters of the vector sensor corrector 8 is realized. Furthermore, the assembly quality of the subsequent vector sensor mounting bracket is improved to ensure flight safety. It can be understood that the auxiliary tool for horizontal calibration of the vector sensor corrector provided in this application can also be applied to the horizontal installation, debugging, and detection of the same type of tooling or products to solve the technical problem that for coaxial cylindrical tooling or products with different diameters and with plane and level structures, due to the free rotation of the cylindrical surface, the levelness of the reference plane cannot be determined, resulting in the inability to accurately calibrate the horizontal parameters of the level.

[0068] The present invention also provides a method for horizontal calibration of a vector sensor corrector in this embodiment. The horizontal calibration method uses the auxiliary tool for horizontal calibration of the vector sensor corrector in the above embodiment to calibrate the levelness and horizontal accuracy of the vector sensor corrector in the aligned state. Specifically, the steps of the horizontal calibration method include:

[0069] Step S1: Align the reference plane 83 of the measured part and measure and obtain the levelness value of the measured part.

[0070] In this step, when aligning the reference plane 83 of the measured part, first clamp the measured part. In this embodiment, place the large cylinder 81 of the measured part in the large-end V-groove 12 and the small cylinder 82 in the small-end V-groove 21, and rotate the measured part to make the reference plane 83 of the measured part approximately parallel to the calibration plate to complete the rough leveling of the reference plane 83 of the measured part. After the rough leveling of the reference plane 83 is completed, install the pressing plate 22 so that the pressing plate 22 cooperates with the small-end V-groove 21 to tightly press the small cylinder 82 of the measured part, realizing the quick clamping of the measured part on the auxiliary tool for horizontal calibration.

[0071] After the measured part is clamped, measure and obtain the lateral adjustment height value and the longitudinal adjustment height value required for precisely leveling the reference plane 83 of the measured part. When obtaining the lateral adjustment height value, use the probe of the lever micrometer to contact point A on the edge of the reference plane 83 and record the reading a in the lever micrometer. Preferably, when the lever micrometer contacts point A, pre-press the measuring range by half a turn to eliminate the play of the measuring rod of the lever micrometer and reduce the measurement error. Move the lever micrometer by translating the gauge stand so that the probe of the lever micrometer contacts point B on the other edge of the reference plane 83 and record the reading b in the lever micrometer. Among them, points A and B are located on the same plane parallel to the lateral direction. In summary, it can be calculated Similarly, when obtaining the vertical adjustment height value, the probe of the lever micrometer is used to contact point C on the edge of the reference plane 83, and the reading in the lever micrometer is recorded as c. Then, contact point D on the other edge of the reference plane 83, and record the reading in the lever micrometer as d. Among them, points C and D are located in the same plane parallel to the longitudinal direction. It can be calculated

[0072] According to the lateral adjustment height value and the vertical adjustment height value, the reference plane 83 of the workpiece to be measured is precisely leveled, that is, the lateral levelness and the vertical levelness of the reference plane 83 are adjusted. The obtained lateral adjustment height value and vertical adjustment height value are applied to the precise leveling process of the workpiece to be measured. As an implementation manner of the present application, during the process of adjusting the lateral levelness of the reference plane 83, the probe of the lever micrometer contacts point B. If the height of point B is less than that of point A, rotate the lateral level adjustment support foot 5 close to point B to increase the reading in the lever micrometer On the contrary, if the height of point B is greater than that of point A, rotate the lateral level adjustment support foot 5 close to point B to decrease the reading in the lever micrometer After the lateral levelness of the reference plane 83 is adjusted, move the probe of the lever micrometer from point B to point A, and observe that the reading difference in the table is less than 0.001 mm. Similarly, the height of point A can also be adjusted by rotating the lateral level adjustment support foot 5 close to point A to achieve the same leveling effect. Using the measured lateral adjustment height value to quickly adjust the lateral levelness of the reference plane 83 solves the technical problems of low efficiency and poor accuracy caused by relying on manual experience to repeatedly try to level

[0073] According to the method of adjusting the lateral levelness of the reference plane 83 using the lateral adjustment height value, similarly, the method of adjusting the vertical levelness of the reference plane 83 using the vertical adjustment height value can be deduced. It should be noted that when rotating the vertical level adjustment support foot 6 to adjust the vertical levelness of the reference plane 83, it is prohibited to rotate any lateral level adjustment support foot 5. The purpose is to maintain the adjusted lateral level state of the reference plane 83, fix the reference point for lateral adjustment, and achieve the effect of quick leveling

[0074] After the reference plane 83 is aligned, continue to level the lateral level 85 and the vertical level 84 on the reference plane 83. Use the visual observation method to judge the position of the bubble on the lateral level 85 and the vertical level 84. If the bubble deviates from the middle position, rotate the fine adjustment screw 86 to adjust the position of the bubble. When the bubbles of the lateral level 85 and the vertical level 84 are centered, the actual level state of the reference plane 83 is accurately presented

[0075] At this point, the reference plane 83 of the measured object is aligned. After the reference plane 83 of the measured object is aligned, the horizontality value of the measured object is obtained by measuring and calculating the difference between the maximum reading and the minimum reading of the lever micrometer on the reference plane 83 of the measured object.

[0076] Step S2: Repeat step S1 several times to obtain a data set of the horizontality of the measured object; in this embodiment, the reference plane 83 of the measured object is repeatedly aligned ten times, and the horizontality of the reference plane 83 after each alignment is measured and recorded, so as to verify the performance of the repeated work of the horizontal calibration auxiliary tooling; the horizontality data of the measured object are shown in the following Table 1 (Data Table of Horizontality of the Measured Object):

[0077]

[0078] Table 1

[0079] Step S3: Calculate and obtain the best estimated value X of the measured levelness of the measured object according to the measured levelness data set;

[0080] In this step, the best estimated value X of the horizontality of the measured object adopts the arithmetic mean of multiple horizontality measurements of the reference plane 83, that is,

[0081] Step S4: evaluating the measurement uncertainty U of the levelness of the measured object according to the levelness data set of the measured object;

[0082] In this step, the sources of measurement uncertainty U include: uncertainty component u1 introduced by measurement repeatability, uncertainty component u2 introduced by measurement standard, uncertainty component u3 introduced by positioning error estimation, and uncertainty component u4 introduced by measurement method; among them, uncertainty component u1 introduced by measurement repeatability is the poor repeatability of the horizontality of the measured object detected by the horizontality calibration auxiliary fixture and the horizontality calibration method, which will cause fluctuations in the horizontality measurement results, thereby affecting the measurement accuracy and reliability; when the measurement standard resolution of the uncertainty component u2 introduced by the measurement standard is too large, it will lead to the inability to accurately judge the size change of the object, and The system error is input into the level measurement result in a constant form, thus affecting the measurement accuracy; the uncertainty component u3 introduced by the positioning error estimation is caused by: due to the shape error of the plane of the inspection plate, the base of the lever micrometer will move to different positions of the inspection plate during the measurement process. Different positions make the readings of the lever micrometer different, thus causing positioning error; the uncertainty component u4 introduced by the measurement method is caused by: when measuring the level, the meter is linearly moved in contact. Although the contact points are evenly distributed on the working surface, the entire plane is not scanned for evaluation and measurement. The measurement is not comprehensive, which may make the level measurement result one-sided.

[0083] When evaluating the uncertainty component u1 introduced by measurement repeatability, the type A method is used for evaluation; according to the dataset of the flatness of the measured part, the single - experiment standard deviation is calculated using the Bessel formula:

[0084]

[0085] The uncertainty component u1 introduced by measurement repeatability in this embodiment is evaluated as u1 = 0.71 (μm).

[0086] When evaluating the uncertainty component u2 introduced by the measurement standard, the type B method is used for evaluation; the indication resolution of the lever micrometer is 0.001 mm, which follows a uniform distribution, and the confidence factor Then the uncertainty component introduced by the measurement standard is evaluated as

[0087] When evaluating the uncertainty component u3 introduced by the estimation of the positioning error, the type B method is used for evaluation; due to the influence of the flatness of the inspection plate, the position of the base of the lever micrometer changes during the flatness measurement, causing a change in the indication of the lever micrometer. Generally, the maximum change does not exceed 0.001 mm. This value follows a uniform distribution in the interval with a half - width of 0.001 mm, and the confidence factor Then the uncertainty component introduced by the estimation of the positioning error is evaluated as

[0088] When evaluating the uncertainty component u4 introduced by the measurement method, the type B method is used for evaluation; the flatness measurement of the measured part uses an approximate measurement method of substituting a line for a plane, which may cause measurement method errors. In this embodiment, it is assumed that the measurement method error of the flatness measurement is 0.0008 mm, which follows a uniform distribution, and the confidence factor Then the uncertainty component introduced by the measurement method is evaluated as That is, u4 = 0.46 (μm).

[0089] The uncertainty component data of the measurement uncertainty U of the flatness of the measured part are shown in Table 2 (Summary Table of Each Uncertainty Component) as follows:

[0090]

[0091] Table 2

[0092] According to the uncertainty component u1 introduced by measurement repeatability, the uncertainty component u2 introduced by the measurement standard, the uncertainty component u3 introduced by the estimation of the positioning error, and the uncertainty component u4 introduced by the measurement method, the combined standard uncertainty is evaluated

[0093]

[0094] According to the combined standard uncertainty u c, the measurement uncertainty U for evaluating the flatness of the DUT is U = ku c = 2 × 1.18 ≈ 2.4 (μm)

[0095] Where: k is the coverage factor.

[0096] In this embodiment, taking k = 2 means considering a 95% confidence interval. Under a normal distribution, approximately 95% of the data will fall within twice the standard deviation of the mean.

[0097] Step S5: Obtain the flatness calibration result L of the DUT;

[0098] In this step, the flatness calibration result L of the DUT should include: the best estimated value X of the measured flatness of the DUT and the measurement uncertainty U of the flatness of the DUT, that is, L = X ± U = 0.001 ± 0.0024 (mm).

[0099] By using a flatness calibration method for a vector sensor corrector provided in this application, the flatness adjustment accuracy of the reference plane 83 of the vector sensor corrector can be improved to 0.001 mm, and the measurement result uncertainty can reach below 2.4 μm.

[0100] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, making equivalent substitutions or changes, should be covered within the protection scope of the present invention.

Claims

1. A vector sensor corrector level calibration auxiliary tooling, characterized in that: include: A large end support block, with flange plates respectively arranged on both sides of the large end support block; A small end support block, wherein the small end support block cooperates with the large end support block to jointly support the test piece; Two transverse level adjustment bolts, the two transverse level adjustment bolts are respectively connected to the bottom of the two flange plates; A longitudinal horizontal adjustment bolt, wherein the longitudinal horizontal adjustment bolt is connected below the small end support block; Two transverse horizontal adjustment feet, the two transverse horizontal adjustment feet are respectively threadedly connected to the two transverse horizontal adjustment bolts, and are used to adjust the height and tilt angle of the large end support block; A longitudinal horizontal adjustment foot, the longitudinal horizontal adjustment foot being threadedly connected to the longitudinal horizontal adjustment bolt and used for adjusting the height of the small end support block; A connecting rod, the two ends of which are respectively connected to the large-end support block and the small-end support block, and the connecting rod is used to transmit the position change of either end to the other end so that the inclination angles of the large-end support block and the small-end support block remain matched.

2. The vector sensor corrector level calibration auxiliary tooling according to claim 1 is characterized in that: The large-end support block is provided with a large-end V-shaped groove with an opening facing upward, and the large-end V-shaped groove is used to laterally limit the portion of the measured object located above the large-end support block; the small-end support block is provided with a small-end V-shaped groove with an opening facing upward, and the small-end V-shaped groove is used to laterally limit the portion of the measured object located above the small-end support block.

3. The vector sensor corrector level calibration auxiliary tooling according to claim 2 is characterized in that: A pressing plate is detachably provided on the upper end of the small end supporting block, and the pressing plate is used to cooperate with the small end V-shaped groove to press against the tested object.

4. The vector sensor corrector level calibration auxiliary tooling according to claim 1, characterized in that: The bottom ends of the transverse horizontal adjustment feet and the longitudinal horizontal adjustment feet are both configured as arc-shaped surfaces.

5. A method for horizontal calibration of a vector sensor corrector, characterized in that: The vector sensor corrector horizontal calibration auxiliary tooling described in claim 3 includes the following steps: Step S1: aligning the reference plane of the vector sensor corrector and measuring and obtaining the horizontality value of the vector sensor corrector; Step S2: Repeat step S1 several times to obtain a vector sensor corrector levelness data set; Step S3: Calculate and obtain the best estimated value X of the vector sensor corrector levelness according to the vector sensor corrector levelness data set; Step S4: evaluating the measurement uncertainty U of the horizontality of the vector sensor corrector according to the horizontality data set of the vector sensor corrector; Step S5: Obtain the horizontal calibration result L of the vector sensor corrector.

6. A method for horizontal calibration of a vector sensor corrector according to claim 5, characterized in that: In step S1, the step of aligning the reference plane of the vector sensor corrector includes: Step S101: Clamp the vector sensor corrector and roughly flatten the reference plane of the vector sensor corrector; Step S102: measuring and obtaining a lateral adjustment height value and a longitudinal adjustment height value of a reference plane of a vector sensor corrector; Step S103: accurately leveling the reference plane of the vector sensor corrector according to the lateral adjustment height value and the longitudinal adjustment height value; Step S104: Leveling the horizontal level and the vertical level on the reference plane of the vector sensor calibrator.

7. A method for horizontal calibration of a vector sensor corrector according to claim 5, characterized in that: In step S4, the step of evaluating the measurement uncertainty U of the horizontality of the vector sensor corrector comprises: Step S401: assessing the uncertainty component u1 introduced by measurement repeatability; assessing the uncertainty component u2 introduced by the measurement standard; assessing the uncertainty component u3 introduced by the positioning error estimation; assessing the uncertainty component u4 introduced by the measurement method; Step S402: Evaluate the combined standard uncertainty u according to the uncertainty component u1 introduced by measurement repeatability, the uncertainty component u2 introduced by the measurement standard, the uncertainty component u3 introduced by the positioning error estimation, and the uncertainty component u4 introduced by the measurement method. c ; Step S403: Based on the synthetic standard uncertainty u c , evaluate the measurement uncertainty U of the horizontality of the vector sensor corrector.

8. A method for horizontal calibration of a vector sensor corrector according to claim 5, characterized in that: In step S5, the vector sensor corrector horizontal calibration result L=X±U; Where: X is the best estimated value of the horizontality of the vector sensor corrector, in millimeters; U is the measurement uncertainty of the horizontality of the vector sensor corrector, in millimeters.

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