A method for installing the main mirror of a medium-to-large aperture theodolite with a small collimation error

Abstract

The present invention relates to a method for installing a main mirror of a medium-to-large aperture theodolite with a small collimation error, and the purpose is to solve the technical problem that the existing main mirror optical axis installation posture causes a large collimation error. The main steps of the method are: 1) determining the main mirror installation reference; 2) determining the reference theodolite; 3) installing and debugging the main mirror, installing and debugging the main mirror assembly according to the optical axis of the reference theodolite, and reducing the collimation error of the main mirror. The present invention reduces the difficulty of subsequent optical path assembly and reduces the system collimation error by adjusting the virtual axis to become the actual calibration reference, thereby improving the imaging quality and measurement accuracy of the entire imaging system.

Description

Technical Field

[0001] The invention relates to a method for installing a theodolite primary mirror, in particular to a method for installing a main mirror of a medium-to-large aperture theodolite with a small collimation error. Background Art

[0002] With the continuous development of information perception needs, users have put forward higher requirements for the working distance, imaging quality and measurement accuracy of photoelectric theodolites. In order to detect targets farther away and with lower energy, the aperture of the theodolite imaging system is getting larger and larger. In the past, small-aperture imaging systems could be installed on a stage, which was connected to the horizontal axis system, and the collimation error could be easily adjusted. However, with the increase in the aperture of the imaging system, the use of a large stage will increase the weight of the equipment and increase the processing cost, so most medium and large-aperture imaging systems use a structure in which the flanges at both ends are directly connected to the horizontal axis system. The problem brought about by this is that once the imaging system is installed, the collimation error cannot be adjusted as a whole. If the collimation error is too large, the imaging quality and measurement accuracy will be affected by the later adjustment of the camera. The benchmark for the assembly of the imaging system is the primary mirror, and the installation posture of the existing primary mirror optical axis will cause a large collimation error. Summary of the invention

[0003] The purpose of the present invention is to solve the technical problem that the installation posture of the optical axis of the main mirror of the existing medium and large aperture imaging system causes a large collimation error, and to provide a method for installing the main mirror of a medium and large aperture theodolite with a small collimation error.

[0004] To solve the above technical problems, the technical solutions provided by the present invention are as follows.

[0005] A method for installing a primary mirror of a medium-to-large aperture theodolite with a small collimation error is special in that it comprises the following steps:

[0006] 1) Determine the primary mirror installation benchmark;

[0007] 1.1) Place a large-aperture plane reflector on the calibration platform, and place a first measuring theodolite and a second measuring theodolite opposite the large-aperture plane reflector. The first measuring theodolite is located directly above the second measuring theodolite, so that the first measuring theodolite and the second measuring theodolite are self-calibrated by the large-aperture plane reflector respectively;

[0008] 1.2) The theodolite to be installed is placed between the first measuring theodolite, the second measuring theodolite and the large-aperture plane reflector, the mirror box of the theodolite to be installed is placed horizontally, and an adjustable reflector is installed on the upper side of the mirror box close to one end of the large-aperture plane reflector, and the adjustable reflector is a double-sided reflector; the adjustable reflector is adjusted so that the reflected images of the second measuring theodolite and the first measuring theodolite in the adjustable reflector overlap after the mirror box is flipped 180°, and the adjustable reflector is fixed as the installation reference of the main mirror;

[0009] 2) Determine the reference theodolite;

[0010] 2.1) adjusting the second measuring theodolite so that the second measuring theodolite and the adjustable reflector are self-aligned;

[0011] 2.2) Use the second measuring theodolite to observe the large-aperture plane reflector, adjust the posture of the large-aperture plane reflector, so that the second measuring theodolite is aligned with the large-aperture plane reflector again, then fix the large-aperture plane reflector, and remove the first measuring theodolite and the second measuring theodolite;

[0012] 2.3) Place a reference theodolite at a position corresponding to the mounting hole of the primary mirror assembly of the mirror box, align the reference theodolite with the large-aperture plane reflector through the mounting hole of the primary mirror assembly, and then fix the reference theodolite;

[0013] 3) Installation and debugging of primary mirror;

[0014] Install the primary mirror assembly into the mirror box mounting hole, align the reference theodolite with the primary mirror reference reflector, fix the primary mirror assembly, and complete the installation of the primary mirror assembly.

[0015] The specific steps of adjusting the adjustable reflector in the above step 1.2) are:

[0016] a) Place the mirror box in a horizontal state, in a positive mirror state, observe the reflected image in the adjustable reflector through the first measuring theodolite, rotate the theodolite turntable and adjust the posture of the adjustable reflector so that the reflected image coincides with the crosshairs of the reticle;

[0017] b) Rotate the mirror box 180° to the inverted mirror state, observe the reflected image in the adjustable reflector through the second measuring theodolite, and adjust the adjustable reflector so that the reflected image observed by the second measuring theodolite moves half the distance in the horizontal direction, then flip the mirror box to the normal mirror state and fix the adjustable reflector.

[0018] The above steps a) and b) further include the following steps:

[0019] A plane reflector is glued to a position corresponding to the horizontal axis on one side of the U-shaped frame where the theodolite is to be installed, and a monitoring theodolite is placed directly opposite to the plane reflector, so that the monitoring theodolite and the plane reflector are self-aligned;

[0020] During the rotation of the mirror box on which the theodolite is to be installed, the self-alignment of the theodolite and the plane reflector is always monitored.

[0021] The specific steps of the above step 3) are:

[0022] Install the main mirror assembly into the mirror box, rotate the unequal thickness ring set between the main mirror assembly and the mirror box, so that the reflected image of the reference theodolite through the main mirror reference reflector coincides with the crosshairs of the graticule in the horizontal direction, and then fix the main mirror assembly to complete the installation.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] The invention provides a method for installing a main mirror of a medium- and large-aperture theodolite with a small collimation error. By adjusting a virtual axis to become a reference for actual calibration, the difficulty of subsequent optical path assembly is greatly reduced, the system collimation error of the main mirror of the medium- and large-aperture theodolite is greatly reduced, and the imaging quality and measurement accuracy of the entire imaging system are improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a self-alignment principle diagram of a large-aperture plane reflector and a first measuring theodolite and a second measuring theodolite in an embodiment of a method for installing a main mirror of a medium- and large-aperture theodolite with a small collimation error of the present invention;

[0026] Figure 2 It is a principle diagram of the self-alignment of the adjustable reflector and the first measuring theodolite in the positive mirror state in an embodiment of a method for installing a main mirror of a medium-to-large aperture theodolite with a small collimation error of the present invention;

[0027] Figure 3 A schematic diagram of the self-alignment of a plane reflector and a monitoring theodolite in accordance with an embodiment of a method for installing a main mirror of a medium-to-large aperture theodolite with a small collimation error according to the present invention;

[0028] Figure 4 It is a self-alignment principle diagram of an adjustable reflector and a second measuring theodolite in an inverted mirror state in an embodiment of a method for installing a main mirror of a medium-to-large aperture theodolite with a small collimation error of the present invention;

[0029] Figure 5 A schematic diagram of adjusting a large-aperture plane reflector according to an embodiment of a method for installing a main mirror of a medium- and large-aperture theodolite with a small collimation error of the present invention;

[0030] Figure 6 It is a self-alignment principle diagram of a reference theodolite and a large-aperture plane reflector in an embodiment of a method for installing a main mirror of a medium- and large-aperture theodolite with a small collimation error of the present invention;

[0031] Figure 7 A schematic diagram of the installation structure of the main mirror assembly of an embodiment of a method for installing a main mirror of a medium-to-large aperture theodolite with a small collimation error according to the present invention;

[0032] Figure 8 It is a front view of an unequal thickness ring of an embodiment of a method for installing a primary mirror of a medium-to-large aperture theodolite with a small collimation error according to the present invention;

[0033] Fig. 9 The left side view of the unequal thickness ring of an embodiment of a method for installing a primary mirror of a medium-to-large aperture theodolite with a small collimation error according to the present invention.

[0034] The following are the descriptions of the reference numerals:

[0035] 1-large-aperture plane reflector; 2-first measuring theodolite; 3-second measuring theodolite; 4-theodolite turntable; 5-mirror box; 6-adjustable reflector; 7-plane reflector; 8-monitoring theodolite; 9-reference theodolite; 10-unequal thickness ring; 11-primary mirror assembly; 12-primary mirror reference reflector. DETAILED DESCRIPTION

[0036] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0037] The present invention provides a method for installing a primary mirror of a medium-to-large aperture theodolite with a small collimation error, such as Figures 1 to 9 As shown, it is a schematic diagram of the installation process of the main mirror of a medium-to-large aperture theodolite to be installed. The theodolite to be installed includes a theodolite turntable 4, a U-shaped frame installed on the theodolite turntable 4, and a mirror box 5 installed on the U-shaped frame through a mounting axis. The mounting axis is perpendicular to the axis of the mirror box 5. The mirror box 5 can rotate 180° along the mounting axis. One end of the mirror box 5 is used to install a main mirror assembly 11. A main mirror is arranged at the center of the main mirror assembly 11. An unequal thickness ring 10 for adjusting the posture of the main mirror is arranged between the main mirror assembly 11 and the end of the mirror box 5.

[0038] In the present invention, the primary mirror installation method of the theodolite to be installed specifically comprises the following steps:

[0039] 1) If Figure 1 As shown, a large-aperture plane reflector 1 is placed on an air-floating platform, and two theodolites are respectively a first measuring theodolite 2 and a second measuring theodolite 3. The second measuring theodolite 3 is placed right in front of the large-aperture plane reflector 1, and the first measuring theodolite 2 is placed right above the second measuring theodolite 3. The height difference between the first measuring theodolite 2 and the second measuring theodolite 3 is the diameter of the mirror box 5.

[0040] The first measuring theodolite 2 and the second measuring theodolite 3 are respectively aligned by the large-aperture plane reflector 1, and then the first measuring theodolite 2 and the second measuring theodolite 3 are fixed, and at this time, the visual axes of the first measuring theodolite 2 and the second measuring theodolite 3 are parallel to each other;

[0041] 2) The theodolite to be installed is placed between the first measuring theodolite 2, the second measuring theodolite 3 and the large-aperture plane reflector 1, and the main mirror installation end is close to the first measuring theodolite 2 and the second measuring theodolite 3, such as Figure 2 As shown, an adjustable reflector 6 is installed above one end of the mirror box 5 where the theodolite is to be installed, close to the large-aperture plane reflector 1. The adjustable reflector 6 is a double-sided reflector; Figure 3 As shown, a plane reflector 7 is bonded to one side of the U-shaped frame on which the theodolite is to be installed, corresponding to the horizontal axis position, and a monitoring theodolite 8 is placed directly opposite to the plane reflector 7;

[0042] Put the mirror box 5 in a horizontal state, that is, in a positive mirror state. Figure 2 As shown, at this time, the first measuring theodolite 2 is facing the adjustable reflector 6, the adjustable reflector 6 is observed through the first measuring theodolite 2, the theodolite turntable 4 is rotated and the posture of the adjustable reflector 6 is adjusted, so that the reflected image of the first measuring theodolite 2 in the adjustable reflector 6 coincides with the crosshairs of the graticule of the first measuring theodolite 2;

[0043] Adjust the monitoring theodolite 8 so that the reflected image of the monitoring theodolite 8 in the plane reflector 7 coincides with the crosshairs of the graticule, that is, the monitoring theodolite 8 and the plane reflector 7 are self-aligned;

[0044] Rotate the mirror box 5 180° to the inverted mirror state. Figure 4 As shown, observe the reflected image of the second measuring theodolite 3 in the adjustable reflector 6. At this time, the reflected image coincides with the crosshairs of the graticule in the vertical direction. According to the distance of the reflected image deviating from the center in the horizontal direction, adjust the adjustable reflector 6 to make the reflected image of the second measuring theodolite 3 in the adjustable reflector 6 move half the distance in the horizontal direction. Then, the mirror box 5 returns to the positive mirror state. At this time, the reflected images of the second measuring theodolite 3 and the first measuring theodolite 2 in the adjustable reflector 6 coincide. Fix the adjustable reflector 6.

[0045] During the rotation process, the monitoring theodolite 8 always maintains self-alignment with the plane reflector 7;

[0046] 3) In the inverted mirror state, adjust the large-aperture plane reflector 1 so that the large-aperture plane reflector 1 and the adjustable reflector 6 are self-aligned;

[0047] like Figure 5 As shown, in the positive mirror state, the second measuring theodolite 3 is used to observe the large-aperture plane reflector 1, and the posture of the large-aperture plane reflector 1 is adjusted so that the second measuring theodolite 3 is again self-aligned with the large-aperture plane reflector 1, and then the large-aperture plane reflector 1 is fixed, and the first measuring theodolite 2 and the second measuring theodolite 3 are removed;

[0048] 4) Take a theodolite, denoted as reference theodolite 9, such as Figure 6 As shown, the main mirror assembly 11 mounting hole of the mirror box 5 is placed at the same height as the main mirror assembly 11 in the positive mirror state, the reference theodolite 9 is self-aligned with the large-aperture plane reflector 1 through the main mirror assembly mounting hole, and then the reference theodolite 9 is fixed;

[0049] 5) If Figure 7 As shown, the main mirror assembly 11 is installed in the mirror box 5, and an unequal thickness ring 10 is installed between the main mirror assembly 11 and the mirror box 5. The structure of the unequal thickness ring 10 is as shown in FIG. Figure 8 , Fig. 9As shown, it is used to adjust the posture of the main mirror assembly 11. The reference reflector 12 is installed in the main mirror assembly 11. The normal of the reference reflector 12 is parallel to the optical axis of the main mirror through the centering process. The unequal thickness ring 10 is rotated to make the reference theodolite 9 and the main mirror reference reflector 12 self-aligned, and the main mirror assembly 11 is fixed to complete the installation of the main mirror assembly 11.

[0050] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit them. For ordinary professional and technical personnel in the field, the specific technical solutions recorded in the above embodiments can be modified, or some of the technical features therein can be replaced by equivalents, and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions protected by the present invention.

Claims

1. A method for installing a primary mirror of a medium-to-large aperture theodolite with a small collimation error, characterized in that it comprises the following steps: 1) Determine the primary mirror installation reference 1.1) A large-aperture plane reflector (1) is placed on a platform, a first measuring theodolite (2) and a second measuring theodolite (3) are placed opposite the large-aperture plane reflector (1), and the first measuring theodolite (2) is located directly above the second measuring theodolite (3), so that the first measuring theodolite (2) and the second measuring theodolite (3) are respectively self-aligned through the large-aperture plane reflector (1); 1.2) The theodolite to be installed is placed between the first measuring theodolite (2), the second measuring theodolite (3) and the large-aperture plane reflector (1), the mirror box (5) of the theodolite to be installed is placed horizontally, and an adjustable reflector (6) is installed on the upper side of the mirror box (5) close to one end of the large-aperture plane reflector (1), and the adjustable reflector (6) is a double-sided reflector; the theodolite turntable (4) is rotated, and the adjustable reflector (6) is adjusted, so that the reflected images of the second measuring theodolite (3) and the first measuring theodolite (2) in the adjustable reflector (6) overlap before and after the mirror box (5) is turned 180 degrees, and the adjustable reflector (6) is fixed as the main mirror installation reference; 2) Determine the reference theodolite 2.1) adjusting the second measuring theodolite (3) so that the second measuring theodolite (3) and the adjustable reflector (6) are self-aligned; 2.2) using the second measuring theodolite (3) to observe the large-aperture plane reflector (1), adjusting the posture of the large-aperture plane reflector (1) so that the second measuring theodolite (3) is again aligned with the large-aperture plane reflector (1), then fixing the large-aperture plane reflector (1), and removing the first measuring theodolite (2) and the second measuring theodolite (3); 2.3) placing a reference theodolite (9) at a position corresponding to the primary mirror assembly mounting hole of the mirror box (5) at the same height, aligning the reference theodolite (9) with the large-aperture plane reflector (1) through the primary mirror assembly mounting hole, and then fixing the reference theodolite (9); 3) Installation and debugging of the main mirror The main mirror assembly (11) is installed into the mirror box (5), and the unequal thickness ring (10) arranged between the main mirror assembly (11) and the mirror box (5) is rotated so that the reflected image of the reference theodolite (9) through the main mirror reference reflector (12) coincides with the crosshairs of the graticule in the horizontal direction, and then the main mirror assembly (11) is fixed to complete the installation.

2. The method for installing a primary mirror of a medium-to-large aperture theodolite with a small collimation error according to claim 1, characterized in that: The specific steps of adjusting the adjustable reflector (6) in step 1.2) are: a) placing the mirror box (5) in a horizontal state, i.e., a positive mirror state, observing the reflected image in the adjustable reflector (6) through the first measuring theodolite (2), rotating the theodolite turntable (4) and adjusting the posture of the adjustable reflector (6) so that the reflected image coincides with the crosshairs of the reticle; b) rotating the mirror box (5) by 180° to a reverse mirror state, observing the reflected image in the adjustable reflector (6) through the second measuring theodolite (3), and adjusting the adjustable reflector (6) so that the reflected image observed by the second measuring theodolite (3) moves half the distance in the horizontal direction, and then flipping the mirror box (5) to a normal mirror state, fixing the adjustable reflector (6).

3. The method for installing a primary mirror of a medium-to-large aperture theodolite with a small collimation error according to claim 2, characterized in that: The steps a) and b) further include the following steps: A plane reflector (7) is bonded to a position corresponding to the horizontal axis on one side of a U-shaped frame on which the theodolite is to be installed, and a monitoring theodolite (8) is placed at a position directly opposite to the plane reflector (7) so that the monitoring theodolite (8) and the plane reflector (7) are self-aligned; During the rotation of the mirror box (5) on which the theodolite is to be installed, the self-alignment of the monitoring theodolite (8) and the plane reflecting mirror (7) is always maintained.

4. The method for installing a primary mirror of a medium-to-large aperture theodolite with a small collimation error according to claim 1, characterized in that: The specific steps of step 3) are: The main mirror assembly (11) is installed into the mirror box (5), and the unequal thickness ring (10) arranged between the main mirror assembly (11) and the mirror box (5) is rotated so that the reflected image of the reference theodolite (9) through the main mirror reference reflector (12) coincides with the crosshairs of the graticule in the horizontal direction, and then the main mirror assembly (11) is fixed to complete the installation.

Images