Device for improving measuring range and precision of autocollimator and measuring method thereof

Abstract

The invention relates to the technical field of angle measurement, in particular to a device for improving the measurement range and precision of an autocollimator, which comprises a gyroscope, a clamping block group, a mounting base, a leveling knob group and a computer, the gyroscope, the clamping block group, the leveling knob group and the computer are all arranged on the mounting base; the clamping block group can move along the length direction and the width direction of the mounting base; the leveling knob group is used for adjusting the state of the mounting base; the gyroscope is connected with the computer; the computer is used for displaying the azimuth angle, the pitch angle and the roll angle of the gyroscope; the clamping block set comprises four clamping blocks, and every two of the four clamping blocks are oppositely arranged in the length direction and the width direction of the mounting base. The invention has the advantages that the autocollimator can measure the azimuth angle difference and pitch angle difference of any multiple targets or the azimuth angle and pitch angle variation of a single target in the space by improving the measurement range and precision of the autocollimator.

Description

Technical Field

[0001] The present invention relates to the technical field of angle measurement, and in particular to a device for improving the measurement range and accuracy of an autocollimator and a measurement method thereof. Background Art

[0002] Angle measurement technology is one of the key prerequisites for high-end manufacturing and an important part of precision measurement. It guides the implementation of precision manufacturing and assembly. As a non-contact angle measurement device based on optical principles, autocollimator is widely used in aerospace, military operations and industrial production.

[0003] The measurement principle of the autocollimator is based on the autocollimation measurement technology. Initially, human eyes were used for observation, but human eye observation has random errors. With the development of technology, the autocollimator has evolved from the traditional optical autocollimator to the photoelectric autocollimator, using sensors such as CCD (charge coupled device) and CMOS (complementary metal oxide semiconductor) to replace human eye measurement, thereby improving the resolution and measurement accuracy. The measurement range has also evolved from single-axis to dual-axis measurement, that is, the target azimuth and elevation angle are measured simultaneously. However, due to the measurement principle, the aperture of the optical system and the limitations of the sensor, the autocollimator cannot move when measuring multiple targets, so the field of view is limited. For high-precision autocollimators, the measurement range is usually no more than 1°. For example, the widely used ELCOMAT 3000 autocollimator has a measurement range of only 35′. In order to solve the problem of the small measurement range of the autocollimator, one method is to start from the autocollimator itself, such as increasing the aperture of the optical system, but this will increase the size of the equipment and reduce the flexibility of the equipment; at the same time, the use of sensors with higher resolution will increase the cost. Another method is to change the external factors of the autocollimator. For example, the Chinese patent publication number is CN105021211A, the publication date is November 4, 2015, and the patent name is "Automatic hand gesture measurement device based on collimator". This patent application requires the use of an autocollimator as an auxiliary equipment to complete the measurement, and the measurement method is relatively complicated. Summary of the invention

[0004] In view of this, the present invention aims to provide a device for improving the measuring range and accuracy of an autocollimator and a measuring method thereof. By combining the device with the autocollimator, the measuring range and accuracy of the autocollimator can be improved. In theory, the azimuth angle difference and pitch angle difference between any multiple target axes in space or the azimuth and pitch angle changes of a single target can be measured.

[0005] To achieve the above-mentioned purpose, the technical solution created by the present invention is implemented as follows: a device for improving the measuring range and accuracy of an autocollimator, comprising a gyroscope, a clamping block group, a mounting base, a leveling knob group and a computer; the gyroscope, the clamping block group and the leveling knob group are all arranged on the mounting base; the gyroscope is connected to the computer; the computer is used to display the angles of the azimuth, pitch and roll of the gyroscope; the clamping block group can move along the length and width directions of the mounting base; the leveling knob group is used to adjust the state of the mounting base; the clamping block group includes four clamping blocks; among them, two clamping blocks are arranged relatively along the length direction of the mounting base; and the other two clamping blocks are arranged relatively along the width direction of the mounting base.

[0006] Furthermore, the leveling knob set includes at least three leveling knobs, two leveling knobs are symmetrically installed at the front end of the mounting base, and one leveling knob is installed at the middle of the rear end of the mounting base.

[0007] Furthermore, the clamping block is an L-shaped structure, and its long side is connected to the mounting base.

[0008] Furthermore, an elongated hole is provided on the plane where the long side of the clamping block is located.

[0009] Furthermore, the gyroscope and the computer are respectively arranged at the rear end of the mounting base near two corners.

[0010] Furthermore, the gyroscope is a three-axis gyroscope.

[0011] A method for improving the measurement range and accuracy of an autocollimator is implemented by using the above-mentioned device for improving the measurement range and accuracy of an autocollimator. The specific steps are as follows: S1: Setting the assembled lifting autocollimator measuring range and accuracy device at a first preset position.

[0012] S2: Fix the pre-leveled autocollimator on the device for improving the measuring range and accuracy of the autocollimator, and define the error angle between the azimuth angle of the autocollimator and the azimuth angle of the gyroscope, and the error angle between the roll angle of the autocollimator and the roll angle of the gyroscope.

[0013] S3: Aim the autocollimator at the first measured target, and make the azimuth and pitch angles of the first measured target measured by the autocollimator zero by adjusting the position of the device for improving the measurement range and accuracy of the autocollimator and the posture of the mounting base; obtain the first azimuth angle of the gyroscope and the first pitch angle of the gyroscope.

[0014] S4: The device for improving the measuring range and accuracy of the autocollimator equipped with the autocollimator in step S2 is set at a second preset position.

[0015] S5: Aim the autocollimator at the second measured target, and adjust the position of the device for improving the measurement range and accuracy of the autocollimator so that the azimuth and pitch angles of the second measured target measured by the autocollimator are both zero; obtain the second azimuth angle and the second pitch angle of the gyroscope.

[0016] S6: According to the error angle of step S2 and the first azimuth angle and the first pitch angle of the gyroscope in step S4, the first measured target azimuth angle and the first measured target pitch angle of the first measured target are obtained; according to the error angle of step S2 and the second azimuth angle and the second pitch angle of the gyroscope in step S5, the second measured target azimuth angle and the second measured target pitch angle are obtained.

[0017] S7: Based on the calculation result of step S6, further obtain the difference between the azimuth angle of the first measured target and the azimuth angle of the second measured target, and the difference between the pitch angle of the first measured target and the pitch angle of the second measured target.

[0018] Furthermore, in step S6, the following formula is used to obtain: α1=α′+α A ; β1=β′+β A ; α2=α′+α B ; β2=β′+β B ; Among them, α1 is the azimuth angle of the first measured target relative to the geodetic coordinates; β1 is the pitch angle of the first measured target relative to the geodetic coordinates; α2 is the azimuth angle of the second measured target relative to the geodetic coordinates; β2 is the pitch angle of the second measured target relative to the geodetic coordinates; α′ is the error angle between the azimuth angle of the autocollimator and the azimuth angle of the gyroscope; β′ is the error angle between the roll angle of the autocollimator and the roll angle of the gyroscope; α A is the first azimuth angle of the gyroscope, β A is the first pitch angle of the gyroscope; α B is the second azimuth angle of the gyroscope, β B Gyro second pitch angle.

[0019] Further, in step S7, the following formula is used to obtain: ∆α=α2-α1=(α′+α B )-( α′+α A ) = α B -α A ; ∆β=β2-β1= β B -β A ; Wherein, ∆α is the difference between the azimuth angle of the first measured target and the azimuth angle of the second measured target, and ∆β is the difference between the pitch angle of the first measured target and the pitch angle of the second measured target.

[0020] Compared with the prior art, the invention can achieve the following beneficial effects: The autocollimator can measure the azimuth angle difference and pitch angle difference of any multiple targets in space or the azimuth angle and pitch angle change of a single target by improving the measurement range and accuracy of the autocollimator. At the same time, it can make up for the measurement error of the autocollimator when it is not leveled, and ensure that there is no roll angle error when the autocollimator is measured through a three-axis gyroscope, thereby improving the measurement accuracy of the autocollimator. At the same time, the device for improving the measurement range and accuracy of the autocollimator is suitable for any type of autocollimator and has strong versatility. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings constituting part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments and descriptions of the present invention are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings: Figure 1 is a schematic diagram of the structure of a device for improving the measurement range and accuracy of an autocollimator provided according to an embodiment of the present invention; Figure 2 It is a structural schematic diagram of an autocollimator provided in an embodiment of the present invention being fixed on a device for improving the measuring range and accuracy of the autocollimator; Figure 3 It is a schematic structural diagram of a geodetic coordinate system, a gyroscope coordinate system, a mounting base coordinate system, and an autocollimator coordinate system provided according to an embodiment of the present invention; Figure 4 is a structural schematic diagram of the relationship between the autocollimator and the gyroscope coordinate system provided by an embodiment of the present invention; Figure 5 is a schematic structural diagram of an autocollimator provided in an embodiment of the present invention measuring a first measured target; Figure 6 It is a schematic structural diagram of the autocollimator provided according to an embodiment of the present invention for measuring a second measured target.

[0022] The reference numerals include: 1. gyroscope; 2. clamping block group; 3. mounting base; 4. leveling knob group; 5. computer; 6. autocollimator; 7. first measured target; 8. second measured target. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the invention more clear, the invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described here are only used to explain the invention and do not constitute a limitation of the invention.

[0024] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0025] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0026] In the description of the invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the invention can be understood according to specific circumstances.

[0027] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0028] like Figure 1-Figure 3As shown, an embodiment of the present invention provides a device for improving the measurement range and accuracy of an autocollimator, comprising a gyroscope 1, a clamping block group 2, a mounting base 3, a leveling knob group 4 and a computer 5. The gyroscope 1, the clamping block group 2, the leveling knob group 4 and the computer 5 are all arranged on the mounting base 3. The gyroscope 1 is connected to the computer 5. The gyroscope 1 and the computer 5 are respectively arranged at the rear end of the mounting base 3 near the two corners. In this embodiment, the gyroscope 1 is a three-axis gyroscope. The computer 5 is used to receive data transmitted by the gyroscope 1, and then display the angles of the azimuth, pitch angle and roll angle of the gyroscope 1. The azimuth angle is the angle of rotation around the Z axis, the pitch angle is the angle of rotation around the X axis, and the roll angle is the angle of rotation around the Y axis.

[0029] In other embodiments, the computer 5 may not be disposed on the mounting base 3 .

[0030] The clamping block group 2 is mainly used to clamp the autocollimator 6, and includes four clamping blocks. The four clamping blocks are arranged on the mounting base 3. Among them, two clamping blocks are arranged opposite to each other along the length direction of the mounting base 3, and the other two clamping blocks are arranged opposite to each other along the width direction of the mounting base. Each clamping block is provided with an elongated hole, so that the clamping block group 2 can move along the length direction and width direction of the mounting base 3. By adjusting the position of the clamping block, different types of autocollimators 6 can be clamped, and the versatility is strong.

[0031] In this embodiment, the clamping block is an L-shaped structure, whose long side is connected to the mounting base 3, and whose short side is used to clamp the autocollimator 6, and the elongated hole is arranged on the plane where the long side of the clamping block is located.

[0032] Autocollimator 6: It is a commonly used metrological test instrument that uses the principle of optical autocollimation and cooperates with a reflector to measure tiny deflection angles, small angle measurements or can be converted into small angle measurements. Autocollimation technology is widely used in precision positioning, automatic angle positioning ring sets, angle measurement, etc. It is a necessary conventional measuring instrument for optical processing and testing, machinery manufacturing, shipbuilding, aerospace, metrology testing, scientific research and other departments. Especially in the field of precision and ultra-precision positioning, it plays an irreplaceable role. The autocollimator 6 is installed on the mounting base 3, and the autocollimator 6 is fixed by the clamping block group 2.

[0033] The leveling knob group 4 is used to adjust the posture of the mounting base 3, that is, the horizontal state of the mounting base 3, the height of the mounting base 3, and the tilt angle of the mounting base 3. The leveling knob group 4 includes at least three leveling knobs. In this embodiment, the number of the leveling knobs is three. Two leveling knobs are symmetrically installed at the front end of the mounting base 3, and one leveling knob is installed in the middle of the rear end of the mounting base 3. The horizontal state of the mounting base 3, the height of the mounting base 3, and the tilt angle of the mounting base 3 are adjusted by adjusting the height of the three leveling knobs.

[0034] like Figure 3 As shown, the earth coordinate system is set to O-XYZ, and the coordinate system of gyroscope 1 is set to OX A Y A Z A , the coordinate system of the mounting base 3 is OX B Y B Z B , the coordinate system of the autocollimator 6 is OX C Y C Z C .

[0035] like Figure 4-Figure 6 As shown, a method for improving the measurement range and accuracy of an autocollimator is implemented by using the above-mentioned device for improving the measurement range and accuracy of an autocollimator. The specific steps are as follows: S1: Setting the assembled lifting autocollimator measuring range and accuracy device at a first preset position.

[0036] First, assemble the gyroscope 1, the clamping block group 2, the leveling knob group 4, and the computer 5 onto the mounting base 3. Next, use a level to level the OX B Y B Then, adjust the gyroscope 1 so that the OX A Y A The surface is parallel to the O-XY plane of the geodetic coordinate system, and the gyroscope 1 is fixed on the mounting base 3. Finally, the assembled lifting autocollimator measuring range and accuracy device is set at the first preset position. The first preset position is the position for measuring the first measured target 7.

[0037] S2: Fix the pre-leveled autocollimator 6 on the device for improving the measuring range and accuracy of the autocollimator, and define the error angle between the azimuth angle of the autocollimator 6 and the azimuth angle of the gyroscope 1 as α′, and the error angle between the roll angle of the autocollimator 6 and the roll angle of the gyroscope 1 as β′.

[0038] The contact bottom surface of the photoelectric autocollimator is ensured to be perpendicular to the optical axis and the sensor target surface before leaving the factory, so additional leveling operation is usually not required. For optical autocollimators that require the assistance of the human eye, leveling can be completed by rotating the optical axis of the autocollimator. After completing the leveling of the autocollimator 6, the clamping block group 2 is used to clamp the autocollimator 6 on the mounting base 3 with screws.

[0039] Due to the improvement of the measuring range and accuracy of the autocollimator, the mounting surface of the mounting base 3 in the device is located at OX B Y B Surface, already pre-wired with gyro 1's OX AY A Therefore, when the autocollimator 6 is fixedly mounted on the mounting base 3, the OX of the autocollimator 6 is C Y C The surface will also be compatible with the gyro 1 OX A Y A The planes remain parallel, that is, the Z C Axis and gyroscope 1 coordinate system Z A The axis is parallel. At this time, the autocollimator 6 coordinate system OX C Y C Z C Relative gyroscope 1 coordinate system OX A Y A Z A Only around Z A The rotation angle α′ of the axis is defined as the error angle of the azimuth axis between the autocollimator 6 and the gyroscope 1. Since the autocollimator 6 and the gyroscope 1 are both fixed on the mounting base 3, the relative angular relationship between them remains unchanged, so the error angles α′ and β′ are constant values.

[0040] The computer 5 is started to display the azimuth, pitch and roll angles of the gyroscope 1 relative to the earth coordinate system in real time. The computer 5 is used to receive data transmitted by the gyroscope 1 and then display the angles of the azimuth, pitch and roll angles of the gyroscope 1.

[0041] S3: Aim the autocollimator 6 at the first measured target 7, and make the azimuth and pitch angles of the first measured target 7 measured by the autocollimator 6 zero by adjusting the position of the device for improving the measuring range and accuracy of the autocollimator and the posture of the mounting base 3; the computer 5 records the first azimuth angle of the gyroscope 1 and the first pitch angle of the gyroscope 1.

[0042] Aim the aperture of the autocollimator 6 at the first measured target 7 so that the autocollimator 6 can read the azimuth and pitch angles of the first measured target 7. Then, continuously fine-tune the placement of the device to improve the measurement range and accuracy of the autocollimator and the height of the three leveling knobs of the leveling knob group 4, and then adjust the posture of the mounting base 3 until the autocollimator 6 measures that the azimuth and pitch angles of the first measured target 7 are both zero. Define the roll angle of the gyroscope 1 as zero degrees, and at this time it can be confirmed that the roll angle of the autocollimator 6 is also zero degrees. The computer 5 records the azimuth angle of the gyroscope 1 as α A , the pitch angle of gyroscope 1 is β A .

[0043] S4: the device for improving the measuring range and accuracy of the autocollimator 6 fixed in step S2 is set at a second preset position. The second preset position is a position for measuring the second measured object 8.

[0044] S5: Align the autocollimator 6 with the second measured target 8, and adjust the position of the device that improves the measurement range and accuracy of the autocollimator so that the azimuth and pitch angles of the second measured target 8 measured by the autocollimator 6 are both zero; the computer 5 records the second azimuth angle α of the gyroscope 1 B , gyroscope 1 second pitch angle β B The process of adjusting the position of the device for increasing the measuring range and precision of the autocollimator is the same as step S4 and will not be described in detail here.

[0045] In this embodiment, the first measured target 7 and the second measured target 8 are reflectors.

[0046] S6: According to the error angle of step S2 and the first azimuth angle and the first pitch angle of the gyroscope in step S4, the first azimuth angle and the first pitch angle of the gyroscope of the first measured target are obtained; according to the error angle of step S2 and the second azimuth angle and the second pitch angle of the gyroscope in step S5, the second azimuth angle and the second pitch angle of the gyroscope of the second measured target are obtained. The following formula is used to obtain: α1=α′+α A ; β1=β′+β A ; α2=α′+α B ; β2=β′+β B ; Among them, α1 is the azimuth angle of the first measured target relative to the geodetic coordinates; β1 is the pitch angle of the first measured target relative to the geodetic coordinates; α2 is the azimuth angle of the second measured target relative to the geodetic coordinates; β2 is the pitch angle of the second measured target relative to the geodetic coordinates; α′ is the error angle between the azimuth angle of the autocollimator and the azimuth angle of the gyroscope; β′ is the error angle between the roll angle of the autocollimator and the roll angle of the gyroscope; α A is the first azimuth angle of the gyroscope, β A is the first pitch angle of the gyroscope; α B is the second azimuth angle of the gyroscope, β B Gyro second pitch angle.

[0047] S7: Based on the calculation result of step S6, further obtain the difference between the azimuth angle of the first measured target and the azimuth angle of the second measured target, and the difference between the pitch angle of the first measured target and the pitch angle of the second measured target. The difference is obtained by the following formula: ∆α=α2-α1=(α′+α B )-( α′+α A ) = α B -α A ; ∆β=β2-β1= β B -βA ; Wherein, ∆α is the difference between the azimuth angle of the first measured target and the azimuth angle of the second measured target, and ∆β is the difference between the pitch angle of the first measured target and the pitch angle of the second measured target.

[0048] The above specific implementations do not constitute a limitation on the protection scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A device for improving the measurement range and accuracy of an autocollimator, characterized in that: Includes gyroscope, clamping block set, mounting base, leveling knob set, and computer; The gyroscope, the clamping block group and the leveling knob group are arranged on the mounting base; the gyroscope is connected to the computer; the computer is used to display the azimuth, pitch and roll angles of the gyroscope; the clamping block group can move along the length direction and width direction of the mounting base; the leveling knob group is used to adjust the state of the mounting base; The clamping block group includes four clamping blocks; wherein two of the clamping blocks are arranged opposite to each other along the length direction of the mounting base; and the other two of the clamping blocks are arranged opposite to each other along the width direction of the mounting base.

2. The device for improving the measuring range and accuracy of an autocollimator according to claim 1, characterized in that: The leveling knob group includes at least three leveling knobs, two of which are symmetrically mounted at the front end of the mounting base, and one leveling knob is mounted at the middle of the rear end of the mounting base.

3. The device for improving the measuring range and accuracy of an autocollimator according to claim 1, characterized in that: The clamping block is an L-shaped structure, and its long side is connected to the mounting base.

4. The device for improving the measuring range and accuracy of an autocollimator according to claim 3, characterized in that: A long hole is arranged on the plane where the long side of the clamping block is located.

5. The device for improving the measuring range and accuracy of an autocollimator according to claim 1, characterized in that: The gyroscope and the computer are respectively arranged at the rear end of the mounting base close to two corners.

6. The device for improving the measuring range and accuracy of an autocollimator according to claim 1, characterized in that: The gyroscope is a three-axis gyroscope.

7. A method for improving the measurement range and accuracy of an autocollimator, implemented by using the device for improving the measurement range and accuracy of an autocollimator according to any one of claims 1 to 6, characterized in that: The specific steps are as follows: S1: Setting the assembled device for improving the measuring range and accuracy of the autocollimator at a first preset position; S2: Fix the pre-leveled autocollimator on the device for improving the measuring range and accuracy of the autocollimator, and define the error angle between the azimuth angle of the autocollimator and the azimuth angle of the gyroscope, and the error angle between the roll angle of the autocollimator and the roll angle of the gyroscope; S3: aligning the autocollimator with the first measured target, and adjusting the position of the device for improving the measurement range and accuracy of the autocollimator and the posture of the mounting base so that the azimuth and pitch angles of the first measured target measured by the autocollimator are both zero; Get the first azimuth angle of the gyroscope and the first pitch angle of the gyroscope; S4: setting the device for improving the measuring range and accuracy of the autocollimator equipped with the autocollimator in step S2 at a second preset position; S5: Aim the autocollimator at the second measured target, and adjust the position of the device for improving the measurement range and accuracy of the autocollimator so that the azimuth and elevation angles of the second measured target measured by the autocollimator are both zero; Obtaining a second azimuth angle of the gyroscope and a second pitch angle of the gyroscope; S6: according to the error angle of step S2 and the first azimuth angle of the gyroscope and the first pitch angle of the gyroscope in step S4, the first measured target azimuth angle and the first measured target pitch angle of the first measured target are obtained; according to the error angle of step S2 and the second azimuth angle of the gyroscope and the second pitch angle of the gyroscope in step S5, the second measured target azimuth angle and the second measured target pitch angle are obtained; S7: Based on the calculation result of step S6, further obtain the difference between the azimuth angle of the first measured target and the azimuth angle of the second measured target, and the difference between the pitch angle of the first measured target and the pitch angle of the second measured target.

8. The method for improving the measurement range and accuracy of an autocollimator according to claim 7, characterized in that: In step S6, the following formula is used to obtain: α1=α′+α A ； β1=β′+β A ； α2=α′+α B ； β2=β′+β B ； Among them, α1 is the azimuth angle of the first measured target relative to the geodetic coordinates; β1 is the pitch angle of the first measured target relative to the geodetic coordinates; α2 is the azimuth angle of the second measured target relative to the geodetic coordinates; β2 is the pitch angle of the second measured target relative to the geodetic coordinates; α′ is the error angle between the azimuth angle of the autocollimator and the azimuth angle of the gyroscope; β′ is the error angle between the roll angle of the autocollimator and the roll angle of the gyroscope; α A is the first azimuth angle of the gyroscope, β A is the first pitch angle of the gyroscope; α B is the second azimuth angle of the gyroscope, β B Gyro second pitch angle.

9. The method for improving the measurement range and accuracy of an autocollimator according to claim 8, characterized in that: In step S6, the following formula is used to obtain: ∆α=α2-α1=(α′+α B )-( α′+α A )= α B -α A ； ∆β=β2-β1= β B -β A ； Wherein, ∆α is the difference between the azimuth angle of the first measured target and the azimuth angle of the second measured target, and ∆β is the difference between the pitch angle of the first measured target and the pitch angle of the second measured target.

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