CN113624257A - Method for testing horizontal one-test-return precision of theodolite - Google Patents
Method for testing horizontal one-test-return precision of theodolite Download PDFInfo
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- CN113624257A CN113624257A CN202110906693.0A CN202110906693A CN113624257A CN 113624257 A CN113624257 A CN 113624257A CN 202110906693 A CN202110906693 A CN 202110906693A CN 113624257 A CN113624257 A CN 113624257A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C25/00—Manufacturing, calibrating, cleaning, or repairing instruments or devices referred to in the other groups of this subclass
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
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Abstract
The invention discloses a method for testing the horizontal one-echo accuracy of a theodolite, which comprises the following steps: (1) adjusting the multi-tooth dividing table to 0 degree, and arranging the theodolite to be tested on the multi-tooth dividing table; (2) aligning the image of the cross hair captured by the camera with the standard cross hair in the computer, and then zeroing the angle alpha on the display panel; (3) rotating the multi-tooth dividing table by a rotation angle delta beta in a positive mirror state, then rotating the sighting part, enabling the camera to capture an image of the cross wire, and recording a test angle theta1(ii) a (4) Repeatedly executing the step (3), and rotating the multi-tooth dividing table in the same direction by the angle delta beta every time; (5) and (5) converting to a reverse mirror state, and repeatedly executing the steps (3) to (4) to obtain a plurality of groups of reverse mirror test angles theta'i(ii) a (6) Analysis of thetaiAnd theta'iAnd calculating to obtain the horizontal direction one-measuring-back precision mu of the theodolite to be measured. The invention can save manpower and reduce the intensity of test workAnd the accuracy of data recording can be improved, and the testing efficiency is improved.
Description
Technical Field
The invention relates to the field of surveying and mapping instruments, in particular to a method for testing the horizontal one-cycle accuracy of a theodolite.
Background
The theodolite is a precise photoelectric goniometer for geodetic measurement for measuring the azimuth angle of a horizontal plane and the pitch angle of a vertical plane. The level-survey accuracy is one of the most important technical indexes in the transit test, is also the basis for dividing the accuracy grade of the transit, and is the standard for measuring the azimuth measurement accuracy of the transit. Therefore, the theodolite is required to be subjected to a horizontal one-test-return precision test before leaving the factory, and the theodolite can be sold and used only when the precision reaches the qualified standard. The existing theodolite horizontal direction one-test-return precision test mainly depends on manual naked eyes to carry out observation and measurement and record data, and due to the fact that the number of steps and data involved in the test process is large, the defects that a data recording link is prone to making mistakes, the naked eye observation and measurement are prone to fatigue and the like exist, and the test efficiency is low.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides an automatic, efficient and high-test-precision theodolite level one-test-return precision test method.
In order to achieve the purpose, the invention adopts the technical scheme that:
the utility model provides a test method of theodolite horizontal direction survey back precision, the theodolite that awaits measuring includes base and the portion of alighting, the portion of alighting can revolute the rotation center line and set up with rotating on the base, the center of rotation line is followed the direction of height of the theodolite that awaits measuring extends, the theodolite that awaits measuring is including being used for showing the portion of alighting winds the center of rotation line is relative the display panel of the rotatory angle alpha of base, the portion of alighting includes the eyepiece, the cross wire has in the eyepiece, test method includes following step:
(1) adjusting a multi-tooth dividing table placed horizontally to beta0Setting the theodolite to be tested on the multi-tooth dividing table, wherein the base is fixedly connected with the multi-tooth dividing table, so that the base and the multi-tooth dividing table can coaxially rotate;
(2) rotating the sighting part to enable the light rays emitted by the light source to project the image of the cross hair into a lens of a camera through a collimator, aligning the image of the cross hair captured by the camera with the standard cross hair in a computer, and then zeroing the angle alpha on the display panel;
(3) keeping the position of the light source unchanged, rotating the multi-tooth dividing table by a rotation angle delta beta when the theodolite to be measured is in a positive mirror state, and then rotating the sighting part to enable the camera to capture the image of the cross wire, wherein the computer calculates to obtain a transverse offset angle delta gamma between the image of the cross wire and the standard cross wire1When the angle on the display panel is alpha1Test angle theta of positive mirror1=α1+Δγ1；
(4) Repeating the step (3) n times, wherein the multi-tooth dividing table is rotated by an angle delta beta along the same direction, the angle delta beta =360 °/n, and when the multi-tooth dividing table is rotated by the total angle betaiWhen = i × Δ β, the angle θ of the positive mirror of the theodolite to be tested is measuredi=αi+ΔγiWherein i is more than or equal to 1 and less than or equal to n;
(5) converting the theodolite to be tested into a reverse mirror state, repeatedly executing the steps (3) - (4), and rotating the multi-tooth dividing table in the same direction by the angle delta beta every time to obtain multiple groups of reverse mirror test angles theta'i；
(6) Analyzing the theta by the computeriAnd theta'iAnd calculating to obtain the horizontal direction one-loop accuracy mu of the theodolite to be measured.
Preferably, after the step (6), a step (7) is further included: if the mu is less than or equal toμ0If yes, the computer judges that the theodolite to be tested is qualified, and tests the angle theta of the positive mirroriAnd the reverse mirror test angle theta'iUploading the test result mu to a database; if the said mu>μ0And (4) judging that the theodolite to be tested is unqualified by the computer, modifying and repairing the theodolite to be tested, and executing the steps (1) - (7) again after repairing.
Further preferably, said μ0=2”。
Preferably, said n =23, said Δ β =15 ° 39' 7.8 ".
Preferably, the test method further comprises the step (0-1): and (2) turning on the light source, the camera and the computer, wherein the computer is electrically connected or in communication connection with the camera, the computer and the theodolite to be detected respectively, and the step (0-1) is not in sequence with the step (1).
Preferably, the test method further comprises the step (0-2): and (3) fixedly arranging the light source on a light source bracket, and detachably installing the light source bracket on a workbench, wherein the step (0-2) is not sequential to the step (1).
Further preferably, in the step (0-2), the light source holder is detachably attached to the table by a magnetic member.
Preferably, the test method further comprises the step (0-3): and (3) sequentially arranging the light source, the theodolite to be tested, the collimator and the camera from back to front along the projection direction of the light source, wherein the step (0-3) is not in sequence with the step (1).
Preferably, the test method further comprises the step (0-4): and (3) mounting the camera on a guide rail, wherein the guide rail extends along the projection direction of the light source, the camera can slide back and forth on the guide rail, and the step (0-4) is not sequential to the step (1).
Further preferably, in the step (2), the camera is slid back and forth along the guide rail to adjust a focal distance so that the cross hair can be imaged in the camera.
Due to the application of the technical scheme, compared with the prior art, the invention has the following advantages: the method for testing the horizontal direction one-time-finding precision of the theodolite has high automation degree, does not need to align a cross mark in an eyepiece of the theodolite to be tested with a reference coordinate through naked eyes, only needs to approximately align the eyepiece with a camera, can obtain accurate measurement data through computer processing, can send and record the measured data by the inside of a computer, avoids errors in the manual input process of the data, can save manpower, reduce the strength of testing work, can increase the accuracy of data recording, and improves the testing efficiency.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic diagram of a conventional theodolite horizontal-direction one-cycle accuracy testing system of the applicant;
FIG. 2 is a schematic view of a data logging interface of the test system of FIG. 1;
FIG. 3 is a schematic diagram of a system for testing the accuracy of a survey of theodolite in the horizontal direction according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of a standard cross-hair interface of the computer in this embodiment;
wherein: 100. a theodolite to be tested; 110. a base; 120. a sighting part; 121. aiming the support; 122. a telescope; 122 a; an eyepiece; 122b, an objective lens; 123. a display panel; 200. a multi-tooth indexing table; 210. a machine platform; 220. a rotating table; 300. a reference coordinate; 400. a work table; 400a, a first mesa; 400b, a second mesa; 410. a base plate; 420. a guide rail; 431. a lens holder; 432. a guide member; 433. a collimator tube support; 500. a light source; 510. a light source holder; 600. a collimator; 700. a camera; 710. a lens assembly; 1. an image of a cross; 2. standard cross hairs; 3. testing personnel; x, a first rotation center line; y, a second rotation center line; z, a third rotation center line; p, the projection direction of the light source.
Detailed Description
Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings so that the advantages and features of the invention may be more readily understood by those skilled in the art.
Referring to fig. 1 and 2, a conventional theodolite horizontal direction one-cycle accuracy testing system of the applicant is shown, which includes a workbench 400, a testing person 3 is located on one side of the workbench 400 (for example, the right side in the view shown in the figure) during testing, and the testing system further includes a multi-tooth index table 200, a collimator 600 and a reference coordinate 300 sequentially arranged on the workbench 400 along the direction gradually away from the testing person 3.
The multi-tooth index table 200 is used for precise rotation angle control, and the precision thereof is 0.1 ″. The multi-tooth index table 200 includes a table 210 and a rotary table 220 rotatably disposed on the table 210 about a second rotation center line Y, the table 210 is horizontally disposed on the table 400, and the second rotation center line Y extends in a vertical direction. The multi-tooth index table 200 is marked with scales, and the angle β of the rotation table 220 relative to the machine table 210 can be read, and β is used as a reference standard angle in the test process.
The collimator 600 is cylindrical and generates a parallel beam so that the tester 3 can observe the standard cross in the reference coordinate 300 through the eyepiece 122a of the theodolite 100 to be tested.
The theodolite 100 to be measured includes a base 110 and an aiming portion 120, and the aiming portion 120 is rotatably provided on the base 110 around a first rotation center line X extending in the height direction of the theodolite 100 to be measured. The sighting section 120 further includes a sighting support 121, a telescope 122, and a display panel 123, wherein the telescope 122 is rotatably provided on the sighting support 121 about a third rotation center line Z extending in the width direction of the theodolite 100 to be measured. The telescope 122 has an eyepiece 122a and an objective 122b on two opposite sides along the length direction thereof, and the eyepiece 122a has a cross-hair therein for aligning with a target. In the process of testing the theodolite horizontal direction-survey accuracy, the cross wire in the eyepiece 122a is mainly used for aligning with the standard cross wire in the reference coordinate 300 to realize the accuracy measurement.
The display panel 123 is used for displaying an angle α of the collimation portion 120 rotating around the first rotation center line X relative to the base 110, the display panel 123 has two groups respectively disposed at two sides of the collimation bracket 121 different in the thickness direction, and the display contents of the two groups of display panels 123 are the same.
When the theodolite 100 to be tested is used, the eyepiece 122a is close to the human eye, and the objective 122b is close to the target object to be observed, so that the tester 3 can observe the image amplified by the objective 122b from the eyepiece 122 a. When the theodolite 100 to be measured is used, the theodolite has a positive mirror state and a reverse mirror state, and the telescope 122 is vertically rotated 180 degrees around the third rotation center line Z in the positive mirror state, so that the theodolite can be converted into the reverse mirror state; conversely, the telescope 122 can be vertically rotated by 180 ° around the third rotation center line Z in the inverted state to be converted into the positive state. The two sets of display panels 123 are arranged symmetrically, so that a user can conveniently read the display panels in the forward mirror state and the reverse mirror state. The arrangement of the positive mirror state and the negative mirror state helps to improve the measurement accuracy of the theodolite, and the specific concept and the distinguishing method thereof are well known to those skilled in the art, and are not described herein again.
Based on the test system, the conventional method for testing the horizontal direction-survey accuracy of the theodolite comprises the following steps:
s1, adjusting the rotation angle of the rotary table 220 of the multi-tooth index table 200 to beta0=0 °, the base 110 of the theodolite 100 to be tested is fixedly disposed on the rotating table 220, so that the base 110 and the rotating table 220 can rotate coaxially, that is, the first rotation center line X and the second rotation center line Y extend substantially in a collinear manner, and the "basic" is emphasized because the first rotation center line X cannot be ensured to extend completely in the vertical direction due to a small amount of error (which is exactly the error to be measured by the testing method) usually existing in the theodolite 100 to be tested;
s2, adjusting the collimator 600 to be consistent with the extending direction of the telescope 122, and abutting the reference coordinate 300 at one end of the collimator 600 far away from the telescope 122, so that the tester 3 can observe the standard cross wire in the reference coordinate 300 through the ocular 122 a;
s3, rotating the aligning unit 120, aligning the cross hair in the eyepiece 122a with the standard cross hair on the reference coordinate 300 by naked eyes, and then zeroing the horizontal angle α on the display panel 123;
s4, in the state of the mirror being upright, the rotating table 220 is rotated in one direction (clockwise or counterclockwise) by Δ β =15 ° 39' 7.8 "(= 360 °/23), the base 110 of the theodolite 100 to be measured is held in fixed connection with the rotating table 220, the sighting part 120 is horizontally rotated, the cross wire in the eyepiece 122a is aligned again with the standard cross wire on the reference coordinate 300 by naked eyes, and the horizontal angle α of rotation on the display panel 123 is recorded1；
S5, repeating the step S4 for 23 times, each time rotating the rotary table 220 in the same direction by the same angle Δ β, when the total rotation angle of the rotary table 220 is βiWhen the angle is not less than 15 degrees, 39' 7.8 "x i, the horizontal angle α of the rotation of the display panel 123 of the theodolite 100 to be measured is recordediI is more than or equal to 1 and less than or equal to 23 to obtain 23 groups of positive mirror test angles alphai；
S6, repeating the steps S4-S5 under the state of reverse mirror to obtain 23 groups of reverse mirror test angles alpha'i；
S7, testing the angle alpha of the positive mirroriReverse mirror test angle alpha'iInputting the data into a computer, calculating an average value, a difference value, a direction value and the like, and finally obtaining the horizontal direction one-cycle accuracy of the theodolite 100 to be measured, wherein a data recording interface is shown in fig. 2.
Therefore, the system and the method for testing the horizontal direction one-return accuracy of the theodolite in the prior art relate to a great deal of labor which depends on manpower, namely, the cross wire needs to be aligned with the standard cross wire by human eyes and data is recorded manually, each theodolite 100 to be tested needs a great deal of repetitive labor work, the testing efficiency is very low in actual operation, and the tester 3 is easy to fatigue, so that errors are caused in the process of aligning and recording data.
Therefore, the invention provides a novel method for testing the horizontal direction one-time-measuring-return precision of the theodolite, which has high automation degree, saves manpower and improves the testing efficiency and accuracy.
Referring to FIG. 3, a test system according to an embodiment of the invention is shown. The test system comprises a workbench 400, a light source 500 arranged on the workbench 400, and a multi-tooth indexing table 200, a collimator 600 and a camera 700 which are arranged on the workbench 400 in sequence from back to front along the projection direction P of the light source. The multi-tooth index table 200 and the collimator 600 may have the same structure as those of the conventional test system, the theodolite 100 to be tested has the same structure as that of the conventional test system, and the theodolite 100 to be tested is also fixed to the rotary table 220 during the test.
In this embodiment, the camera 700 includes a long cylindrical lens assembly 710, the light source 500 abuts against the eyepiece 122a of the theodolite 100 to be measured, the projection direction P of the light source extends in the horizontal direction, and the lens assembly 710, the collimator 600, and the telescope 122 of the theodolite 100 to be measured extend collinearly in the projection direction P of the light source, so that the light source 500 can accurately project the image 1 of the cross wire in the eyepiece 122a into the lens assembly 710.
Further, in order to automate the testing method, the testing system further includes a computer (not shown in the figure), the computer is electrically or communicatively connected to the camera 700, the computer is electrically or communicatively connected to the theodolite 100 to be tested, and the computer has a standard cross wire 2 therein for reference of the image 1 of the cross wire. The computer is used for recording the angles α and β and for calculating the lateral offset angle Δ γ (see fig. 4) between the image 1 of the cross hair and the standard cross hair 2, and further for calculating the horizontal-direction one-turn accuracy μ of the theodolite 100 to be measured and for determining whether the accuracy μ of the theodolite 100 to be measured is acceptable.
In order to further optimize the testing system, in this embodiment, the worktable 400 has a first table top 400a and a second table top 400b, the second table top 400b is higher than the first table top 400a, the light source 500 and the multi-tooth index table 200 are disposed on the first table top 400a, and the collimator 600 and the camera 700 are disposed on the second table top, so that the theodolite 100 to be tested can be conveniently carried and the multi-tooth index table 200 can be conveniently operated, and the lens assembly 710, the collimator 600, the telescope 122 and the light source 500 can be disposed at the same horizontal height.
In this embodiment, the light source 500 is detachably disposed on the first table 400a, so as to facilitate installation, maintenance, replacement, and the like. Specifically, the light source 500 is fixedly disposed on the light source holder 510, and the light source holder 510 is detachably mounted on the first table 400 a. Specifically, the detachable connection is realized by using a magnetic element, a first magnetic member (not shown in the figure) is arranged at the bottom of the light source support 510, a second magnetic member (not shown in the figure) is arranged on the first table top 400a, and the first magnetic member and the second magnetic member can be magnetically attracted, so that the detachable connection is stable, and the detachable connection is convenient. In other embodiments, the light source holder 510 and the first table 400a may be detachably connected by mechanical engagement or other methods.
In this embodiment, the bottom plate 410 is fixedly disposed on the second table 400b, and the camera 700 and the collimator 600 are both disposed on the bottom plate 410. The bottom plate 410 is made of aluminum alloy materials, and is light, high in strength and low in cost. The bottom plate 410 is fixedly provided with a collimator bracket 433 for fixedly supporting the collimator 600. The camera 700 and its lens assembly 710 are disposed on the base plate 410 to be movable back and forth in the projection direction P of the light source. Specifically, in the projection direction P of the light source, the front end portion of the bottom plate 410 is located outside the second table 400b, which is convenient for manual adjustment, a guide rail 420 extending along the projection direction P of the light source is fixedly arranged on the front end portion, the lens assembly 710 is fixedly arranged on the lens holder 431, a guide part 432 is arranged at the bottom of the lens holder 431, in this embodiment, the guide part 432 specifically adopts a roller, and the roller can be arranged on the guide rail 420 in a rolling manner along the extension direction of the guide rail 420, so that the camera 700 and the lens assembly 710 thereof can be driven to slide back and forth along the guide rail 420, and the focal length can be adjusted.
The following specifically explains the method for testing the horizontal direction-survey accuracy of the theodolite in the embodiment, which comprises the following steps:
(0-1) turning on the light source 500, the camera 700 and the computer, and electrically or communicatively connecting the computer with the camera 700 and the theodolite 100 to be tested respectively;
(0-2) fixedly disposing the light source 500 on the light source holder 510, and mounting the light source holder 510 on the first table 400a through the first magnetic member;
(0-3) arranging the light source 500, the theodolite 100 to be measured, the collimator 600 and the camera 700 in sequence from back to front along the projection direction P of the light source;
(0-4) mounting the camera 700 on the guide rail 420, mounting the collimator 600 on the collimator holder 433, and mounting the base plate 410 on the second stage 400 b;
(1) the rotation angle of the rotary table 220 of the multi-tooth index table 200 placed horizontally is adjusted to beta0=0 °, the base 110 of the theodolite 100 to be measured is fixedly disposed on the rotating table 220, so that the base 110 and the rotating table 220 can coaxially rotate;
(2) the light source 500 is lightened, the sighting part 120 of the theodolite 100 to be measured is rotated, the objective lens 122b is aligned with the collimator tube 600, the camera 700 slides back and forth along the guide rail 420, the focal length is adjusted, light rays emitted by the light source 500 can project an image 1 of the cross wire in the eyepiece 122a into the lens assembly 710 through the collimator tube 600, the cross wire can be clearly imaged in the camera 700, the rotation angle of the sighting part 120 is further adjusted, the image 1 of the cross wire is completely aligned with a standard cross wire 2 in the computer, and then the angle alpha on the display panel 123 is zeroed;
(3) keeping the position of the light source 500 on the first table 400a unchanged, rotating the rotating table 220 by an angle Δ β =15 ° 39' 7.8 "while the theodolite 100 to be measured is in a positive mirror state, and then rotating the sighting part 120, when the objective lens 122b is approximately aligned with the collimator 600, the camera 700 can capture the image 1 of the cross wire again, so that the computer can calculate the lateral offset angle Δ γ between the image 1 of the cross wire and the standard cross wire 21At this time, the angle on the display panel 123 is α1Test angle theta of positive mirror1=α1+Δγ1；
(4) Repeating the step (3) for 23 times, rotating the rotating platform 220 in the same direction by the angle delta beta each time, and rotating the rotating platform 220 by the total angle beta when the rotating platform 220 rotatesiWhen = i × Δ β, the angle θ of the positive mirror of the theodolite 100 to be measured is measuredi=αi+ΔγiWherein i is more than or equal to 1 and less than or equal to 23, wherein,when alpha isi>βiOf (a) isiIs a negative value; when alpha isi<βiOf (a) isiIs a positive value;
(5) converting the theodolite 100 to be tested into a reverse mirror state, repeatedly executing the steps (3) - (4), and rotating the rotating platform 220 in the same direction by the angle delta beta each time to obtain multiple groups of reverse mirror test angles theta'i；
(6) Analysis of theta by computeriAnd theta'iAnd calculating to obtain the horizontal-direction first-return accuracy mu of the theodolite 100 to be measured.
(7) If mu is less than or equal to mu0Then the computer judges that the theodolite 100 to be tested is qualified and tests the angle theta of the positive mirroriAnd reverse mirror test angle theta'iAnd uploading the test result mu to a database; mu.s of>μ0If the theodolite 100 to be tested is not qualified, the computer determines that the theodolite 100 to be tested is qualified, the theodolite 100 to be tested is repaired, and the steps (1) to (7) are executed again after the repair, wherein in the embodiment, mu0=2”。
Wherein, the steps (0-1), (0-2), (0-3), (0-4) and (1) are not in sequence.
Thus, in the testing method of the embodiment, the tester 3 only needs to approximately align the objective lens 122b with the collimator 600, and does not need to precisely align the image 1 of the cross wire with the standard cross wire 2 by naked eyes or manually record data, so that the labor intensity is greatly reduced, and the testing efficiency and the accuracy of data recording are remarkably improved.
The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.
Claims (10)
1. The utility model provides a test method of theodolite horizontal direction survey back precision, the theodolite that awaits measuring includes base and the portion of alighting, the portion of alighting can revolute the rotation center line and set up with rotating on the base, the center of rotation line is followed the direction of height of the theodolite that awaits measuring extends, the theodolite that awaits measuring is including being used for showing the portion of alighting winds the center of rotation line is relative the display panel of the rotatory angle alpha of base, the portion of alighting includes the eyepiece, the cross wire has in the eyepiece, a serial communication port, test method includes following step:
(1) adjusting a multi-tooth dividing table placed horizontally to beta0Setting the theodolite to be tested on the multi-tooth dividing table, wherein the base is fixedly connected with the multi-tooth dividing table, so that the base and the multi-tooth dividing table can coaxially rotate;
(2) rotating the sighting part to enable the light rays emitted by the light source to project the image of the cross hair into a lens of a camera through a collimator, aligning the image of the cross hair captured by the camera with the standard cross hair in a computer, and then zeroing the angle alpha on the display panel;
(3) keeping the position of the light source unchanged, rotating the multi-tooth dividing table by a rotation angle delta beta when the theodolite to be measured is in a positive mirror state, and then rotating the sighting part to enable the camera to capture the image of the cross wire, wherein the computer calculates to obtain a transverse offset angle delta gamma between the image of the cross wire and the standard cross wire1When the angle on the display panel is alpha1Test angle theta of positive mirror1=α1+Δγ1；
(4) Repeating the step (3) n times, wherein the multi-tooth dividing table is rotated by an angle delta beta along the same direction, the angle delta beta =360 °/n, and when the multi-tooth dividing table is rotated by the total angle betaiWhen = i × Δ β, the angle θ of the positive mirror of the theodolite to be tested is measuredi=αi+ΔγiWherein i is more than or equal to 1 and less than or equal to n;
(5) converting the theodolite to be tested into a reverse mirror state, repeatedly executing the steps (3) - (4), and rotating the multi-tooth dividing table in the same direction by the angle delta beta every time to obtain multiple groups of reverse mirror test angles theta'i；
(6) Analyzing the theta by the computeriAnd theta'iAnd calculating to obtain the horizontal direction one-loop accuracy mu of the theodolite to be measured.
2. The method for testing the accuracy of the theodolite horizontal direction-survey back of claim 1, which comprises the step (7) after the step (6): if mu is less than or equal to mu0If yes, the computer judges that the theodolite to be tested is qualified, and tests the angle theta of the positive mirroriAnd the reverse mirror test angle theta'iUploading the test result mu to a database; if the said mu>μ0And (4) judging that the theodolite to be tested is unqualified by the computer, modifying and repairing the theodolite to be tested, and executing the steps (1) - (7) again after repairing.
3. The method of claim 2 for testing the accuracy of a survey of theodolite in the horizontal direction, comprising: the mu0=2”。
4. The method of claim 1 for testing the accuracy of a survey of theodolite in the horizontal direction, comprising: the n =23, the Δ β =15 ° 39' 7.8 ".
5. The method for testing the accuracy of a single compass horizontal direction of a theodolite according to claim 1, further comprising the step (0-1): and (2) turning on the light source, the camera and the computer, wherein the computer is electrically connected or in communication connection with the camera, the computer and the theodolite to be detected respectively, and the step (0-1) is not in sequence with the step (1).
6. The method for testing the accuracy of a single compass horizontal direction of a theodolite according to claim 1, further comprising the steps of (0-2): and (3) fixedly arranging the light source on a light source bracket, and detachably installing the light source bracket on a workbench, wherein the step (0-2) is not sequential to the step (1).
7. The method of claim 6 for testing the accuracy of a survey of theodolite in the horizontal direction, comprising: in the step (0-2), the light source holder is detachably attached to the table by a magnetic member.
8. The method for testing the accuracy of a single compass horizontal direction of a theodolite according to claim 1, further comprising the steps of (0-3): and (3) sequentially arranging the light source, the theodolite to be tested, the collimator and the camera from back to front along the projection direction of the light source, wherein the step (0-3) is not in sequence with the step (1).
9. The method for testing the accuracy of a single compass horizontal direction of a theodolite according to claim 1, further comprising the steps of (0-4): and (3) mounting the camera on a guide rail, wherein the guide rail extends along the projection direction of the light source, the camera can slide back and forth on the guide rail, and the step (0-4) is not sequential to the step (1).
10. The method of claim 9 for testing the accuracy of a survey of theodolite in the horizontal direction, comprising: in the step (2), the camera is slid back and forth along the guide rail to adjust a focal length so that the cross hair can be imaged in the camera.
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