A testing method for gyrotheodolite in the field environment

Abstract

The present application discloses a method for testing a gyro-theodolite in the field environment, which relates to the field of aiming and orientation, and includes: adjusting a standard hexahedron to be horizontal and stable. The standard hexahedron has four working surfaces capable of reflecting light. The four working surfaces are successively arranged in a circle, and the adjacent two working surfaces are perpendicular to each other; using the gyro-theodolite to perform north-seeking measurements on the working surfaces in four directions of the standard hexahedron respectively, and recording the north-seeking measurement values; using the north-seeking measurement values, calculating the north-seeking accuracy and north-seeking repeatability of the gyro-theodolite, so as to achieve the purpose of evaluating the north-seeking performance of the gyro-theodolite. The problem of testing the gyro-theodolite in the field environment without support is solved, the north-seeking accuracy of the north-seeking instrument during the application process is ensured, and the initial alignment accuracy of the inertial system of the missile weapon is guaranteed.

Description

Technical Field

[0001] The present application relates to a method for testing a gyrotheodolite in a field environment, belonging to the technical field of aiming and orientation. Background Art

[0002] A gyrotheodolite is a commonly used orientation device that can obtain a true north measurement accuracy within 5″ in just a few minutes. It is applied to the calibration of inertial systems and the aiming or calibration before the launch of missile weapon systems. However, during the test process of the gyrotheodolite, a northward reference is required, which is generally carried out in a laboratory or in the field where a northward reference is established. The establishment of a northward reference requires long-term astronomical observations and engineering construction, and the establishment time is relatively long. The application scenarios of the gyrotheodolite are generally located in unprotected positions in the field, without a northward reference. For a gyrotheodolite calibrated in the laboratory, after transportation and reaching an unprotected position, it is impossible to judge whether the north-seeking accuracy can meet the usage requirements. Summary of the Invention

[0003] The technical problem solved by the present invention is: overcoming the deficiencies of the prior art, providing a method for testing the north-seeking accuracy of a gyrotheodolite in a field environment, solving the problem of testing the gyrotheodolite in an unprotected field environment, ensuring the north-seeking accuracy of the gyrotheodolite during the application process, and guaranteeing the initial alignment accuracy of the missile weapon inertial system.

[0004] Furthermore, it solves: for measuring the north-seeking accuracy of a gyrotheodolite at a launch site without relying on preset facilities or equipment such as a northward azimuth reference, realizing the performance evaluation of the gyrotheodolite, and ensuring the initial alignment accuracy of the missile weapon system.

[0005] The technical solution of the present invention is:

[0006] A method for testing a gyrotheodolite in a field environment, comprising:

[0007] Adjust the standard hexahedron to be horizontal and stable. The standard hexahedron has four reflective working surfaces, and the four working surfaces are sequentially arranged in a circle. The adjacent two working surfaces are perpendicular to each other, and the opposite two working surfaces are parallel to each other;

[0008] Use the gyrotheodolite to perform north-seeking measurements on the working surfaces in four directions of the standard hexahedron respectively, and record the north-seeking measurement values;

[0009] Use the north-seeking measurement values to calculate the north-seeking accuracy and north-seeking repeatability of the gyrotheodolite, so as to achieve the purpose of evaluating the north-seeking performance of the gyrotheodolite.

[0010] When using the gyrotheodolite to perform north-seeking measurements on the working surfaces in four directions of the standard hexahedron respectively:

[0011] Install the gyrotheodolite on a tripod, adjust the position and height of the gyrotheodolite so that the telescope of the gyrotheodolite can perform autocollimation measurement on the working surface of the standard hexahedron;

[0012] The four working surfaces of the standard hexahedron are the first working surface, the second working surface, the third working surface, and the fourth working surface in sequence. The gyrotheodolite performs north-seeking measurement on the four working surfaces no less than 6 times in sequence.

[0013] After performing north-seeking measurement on the first working surface multiple times, the north-seeking result is A 1i , and the north-seeking accuracy σ1 of the first working surface is:

[0014]

[0015] In the formula: n is the number of north-seeking measurement times on the first working surface;

[0016] is the average value of the north-seeking measurement data for n times.

[0017] After performing north-seeking measurement on the second working surface multiple times, the north-seeking result is A 2i , and the north-seeking accuracy σ2 of the second working surface is:

[0018]

[0019] In the formula: n is the number of north-seeking measurement times on the second working surface;

[0020]

[0021] After performing north-seeking measurement on the third working surface multiple times, the north-seeking result is A 3i , and the north-seeking accuracy σ3 of the third working surface is:

[0022]

[0023] In the formula: n is the number of north-seeking measurement times on the third working surface;

[0024]

[0025] After performing north-seeking measurement on the fourth working surface multiple times, the north-seeking result is A 4i , and the north-seeking accuracy σ4 of the fourth working surface is:

[0026]

[0027] In the formula: n is the number of north-seeking measurement times on the fourth working surface;

[0028]

[0029] The north-seeking accuracy σ of the gyrotheodolite is σ = MAX(σ1, σ2, σ3, σ4).

[0030] The standard hexahedron is mounted on an adjustable leveling base, and a level gauge for monitoring the level of the standard hexahedron is provided on the adjustable leveling base.

[0031] The level gauge uses two long spirit levels perpendicular to each other.

[0032] In summary, the present application includes at least the following beneficial technical effects:

[0033] By using the above method, the problem of testing the gyrotheodolite in the field without a support position is solved. Without relying on a preset northward azimuth reference, the north-seeking accuracy and north-seeking repeatability of the gyrotheodolite are evaluated. The testing process is convenient and fast, and good results are obtained. Description of the Drawings

[0034] Figure 1 is an adjustable leveling standard hexahedron;

[0035] Figure 2 is a schematic diagram of the north-seeking accuracy test of the gyrotheodolite.

[0036] Description of the Reference Numerals in the Drawings

[0037] 1. Horizontal adjustment base; 2. Long spirit level; 3. Standard hexahedron; 4. Adjustable leveling standard hexahedron; 5. Stable support; 6. Tripod; 7. Gyrotheodolite;

[0038] 31. First working surface; 32. Second working surface; 33. Third working surface; 34. Fourth working surface. Detailed Embodiments

[0039] The following further describes the present application in detail with reference to the drawings and specific embodiments:

[0040] The embodiment of the present application discloses a testing method for a gyrotheodolite in a field environment. As shown in Figure 1 and Figure 2 , it includes the following steps:

[0041] 1. Through precision machining, a standard hexahedron 3 is developed. As shown in Figure 1 , all four working surfaces of the standard hexahedron 3 can reflect light. The four reflective working surfaces are arranged in a circle in sequence, and the adjacent two working surfaces are perpendicular to each other. The opposite working surfaces of the standard hexahedron 3 are parallel to each other in pairs, and the parallelism error is not greater than 1", and the adjacent working surfaces are perpendicular to each other in pairs, and the perpendicularity error is not greater than 1".

[0042] 2. The standard hexahedron 3 is installed on a horizontal adjustment base 1 that can adjust the level. Two long spirit levels in two directions are installed on the horizontal adjustment base 1, and the display of the long spirit level can represent the level of the standard hexahedron 3.

[0043] 3. When in the field, install the adjustable leveling standard hexahedron 4 on a stable support 5, adjust the leveling base 1, and ensure the level of the standard hexahedron 3 by observing the long spirit level.

[0044] 4. Install the gyrotheodolite 7 on the tripod 6, adjust its position and height so that its telescope can perform auto-collimation measurement on the working surface of the standard hexahedron 3. Level the gyrotheodolite 7.

[0045] 5. Power on the gyrotheodolite 7, perform no less than 6 north-seeking measurements on the first working surface of the standard hexahedron 3. The north-seeking result of the i-th time is A 1i , and the north-seeking accuracy for the first working surface is:

[0046]

[0047] where: n——the number of north-seeking measurements on the first working surface;

[0048] ——the average value of the north-seeking measurement data for n times.

[0049] 6. Keep the standard hexahedron 3 stationary, move the tripod 6 and the gyrotheodolite 7 so that the gyrotheodolite 7 is aligned with the second working surface of the standard hexahedron 3. Adjust the gyrotheodolite according to the steps in item 4 above, and perform no less than 6 north-seeking measurements on the second working surface. The north-seeking result of the i-th time is A 2i , and the north-seeking accuracy for the second working surface is:

[0050]

[0051] where: n——the number of north-seeking measurements on the second working surface;

[0052] x

[0053] 7. Keep the standard hexahedron 3 stationary, move the tripod 6 and the gyrotheodolite 7 so that the gyrotheodolite 7 is aligned with the third working surface of the standard hexahedron 3. Adjust the gyrotheodolite according to the steps in item 4 above, and perform no less than 6 north-seeking measurements on the third working surface. The north-seeking result of the i-th time is A 3i , and the north-seeking accuracy for the third working surface is:

[0054]

[0055] where: n——the number of north-seeking measurements on the third working surface;

[0056]

[0057] 8. Keep the standard hexahedron 3 stationary, move the tripod 6 and the gyrotheodolite 7 so that the gyrotheodolite 7 is aligned with the fourth working surface of the standard hexahedron 3. Adjust the gyrotheodolite according to the steps in item 4 above, and conduct no less than 6 north-seeking measurements on the fourth working surface. The north-seeking result of the i-th time is A 4i , and the north-seeking accuracy for the fourth working surface is:

[0058]

[0059] where: n——the number of north-seeking measurements on the fourth working surface;

[0060]

[0061] 9. Take the maximum value of the north-seeking accuracies for different working surfaces above as the north-seeking accuracy of the gyro north-seeking instrument, that is:

[0062] σ = MAX(σ1, σ2, σ3, σ4)

[0063] Complete the test of the north-seeking accuracy of the gyro north-seeking instrument in the field environment.

[0064] Although the present invention is disclosed above with preferred embodiments, it is not used to limit the present invention. Any person skilled in the art can make possible changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention should be subject to the scope defined by the claims of the present invention.

Claims

1. A test method for a gyrotheodolite in the field environment, characterized in that: Including Adjust the standard hexahedron (3) to be horizontal and stable. The standard hexahedron (3) has four working surfaces that can reflect light. The four working surfaces are arranged in a circle in sequence, and the adjacent two working surfaces are perpendicular to each other, and the opposite two working surfaces are parallel to each other; Use a gyro-theodolite (7) to perform north-seeking measurements on the working surfaces in four directions of the standard hexahedron (3) respectively, and record the north-seeking measurement values; Use the north-seeking measurement values to calculate the north-seeking accuracy and north-seeking repeatability of the gyro-theodolite (7), so as to achieve the purpose of evaluating the north-seeking performance of the gyro-theodolite (7); When using the gyro-theodolite (7) to perform north-seeking measurements on the working surfaces in four directions of the standard hexahedron (3) respectively: Install the gyro-theodolite (7) on the tripod (6), and adjust the position and height of the gyro-theodolite (7) so that the telescope of the gyro-theodolite (7) can perform autocollimation measurement on the working surface of the standard hexahedron (3); The four working surfaces of the standard hexahedron (3) are the first working surface (31), the second working surface (32), the third working surface (33), and the fourth working surface (34) in sequence. The gyro-theodolite (7) performs north-seeking measurements on the four working surfaces no less than 6 times in sequence.

2. The testing method of a gyro-theodolite in the field environment according to claim 1, characterized in that: After performing multiple north-seeking measurements on the first working surface (31), the north-seeking result is A 1i , the north-seeking accuracy of the first working surface (31) σ 1 is: In the formula: n is the number of north-seeking measurements for the first working surface; is n the average value of the north-seeking measurement data for the second time.

3. A testing method for a gyro-theodolite in a field environment according to claim 2, characterized in that: After performing multiple north-seeking measurements on the second working surface (32), the north-seeking result is A 2i , the north-seeking accuracy of the second working surface σ 2 is: Wherein: n is the number of north-seeking measurements for the second working face (32); 。 4. A testing method for a gyrotheodolite in a field environment according to claim 3, characterized in that: After performing multiple north-seeking measurements on the third working face (33), the north-seeking result is A 3i , the north-seeking accuracy of the third working face (33) σ is: In the formula: n is the number of north-seeking measurements for the third working face (33); 。 5. The test method of a gyrotheodolite in a field environment according to claim 4, characterized in that: After performing multiple north-seeking measurements on the fourth working face (34), the north-seeking result is A 4i , the north-seeking accuracy of the fourth working face (34) σ is as follows: Where: n is the number of north-seeking measurements on the fourth working surface (34); 。 6. The testing method of a gyrotheodolite in a field environment according to claim 5, characterized in that: The north-seeking accuracy σ of the gyro-theodolite (7) = MAX(σ1, σ2, σ3, σ4).

7. A testing method for a gyrotheodolite in a field environment according to claim 1, characterized in that: The standard hexahedron (3) is installed on an adjustable base, and a level gauge for monitoring the levelness of the standard hexahedron (3) is provided on the adjustable base.

8. A testing method for a gyrotheodolite in a field environment according to claim 7, characterized in that: The level gauge uses two mutually perpendicular long spirit levels.

9. A testing method for a gyrotheodolite in a field environment according to claim 1, characterized in that: The parallelism error between the opposite working surfaces of the standard hexahedron (3) is not greater than 1", and the perpendicularity error between the adjacent working surfaces is not greater than 1".

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