CN102679946B - Method for calibrating spatial azimuth angle of light collimation system - Google Patents

Abstract

The invention relates to a method for calibrating the space azimuth angle of an optical pointing system. The indexing table turntable is used to translate the height of the reference prism normal, which is used to quickly measure the angle between the upper and lower azimuths in the combination of northward reference measurement and transmission. The included angle between the prism normal is about 90 degrees. The device consists of a collimating theodolite 1, a support cylinder 2, an instrument base 3, a support lower plate 4, a support upper plate 5, a pressing mechanism 6, a refracting optical path device 7, a suspension mechanism 8, and an indexing table turntable 9. Among them, the deflection optical path device 7 and the suspension mechanism 8 are combined into a whole, and are suspended on the upper surface and side of the northward reference measurement transmission assembly 10 when in use, and the index table turntable 9 is located between the lower plate 4 of the bracket and the instrument base 3 . The deflection optical path device 7 is composed of an optical prism 11 with a cross-sectional shape parallelogram and corresponding optical fixing mechanism. The calibration device can quickly and accurately measure the included angle between the goniometric prism 12 and the normal line of the reference prism 13 in space.

Description

Calibration Method of Space Azimuth Angle of Optical Sighting System

■Technical field

The invention relates to an aiming system, in particular to a space azimuth calibration method in an optical aiming system.

■Background technology

In the optical pointing system, it generally includes a north reference measurement transfer combination composed of a lower instrument and a gyro compass. Wherein, the goniometric prism inside the lower instrument and the reference prism at the lower part are not in the same horizontal plane in height, but differ from each other by about 90 degrees in azimuth. Therefore, an included angle in space is formed between the two. In order to ensure the accuracy of the instrument, it is necessary to measure the space angle frequently. The conventional measurement method uses the autocollimation theodolite to be erected twice at two different heights and different positions corresponding to the normal positions of the two measured prisms, and the angle is measured by aiming at the same large-diameter reflective plane mirror. benchmark delivery. Obviously, in order to measure this included angle, since the theodolite is erected twice in different azimuths, positions, and different heights, it is necessary to perform two position movement, fixation and leveling operations on the theodolite, and it is necessary to aim at the two measured points respectively. Prism and double-light aiming large reflector. Since the measurement of the collimation theodolite is a precision measurement, the measurement and operation process is very time-consuming and laborious, and the efficiency is low.

■Invention contents:

The object of the present invention is to provide a kind of space azimuth calibration method, be used for fast measurement to the included angle between the prism normal of the upper and lower two azimuth angles of about 90 degrees in the combination of northward reference measurement and transmission, to shorten Measure time, reduce the work intensity of testers, and improve work efficiency.

The space azimuth calibration device consists of a collimating theodolite, a support tube, an instrument base, a support lower plate, a support upper plate, a pressing mechanism, and also includes a deflection optical path device, a suspension mechanism and an indexing table turntable. Among them, the deflection optical path device and the suspension mechanism are combined into a whole, and are suspended on the upper surface and side of the northward reference measurement transmission combination when in use, and the indexing table turntable is located between the lower plate of the bracket and the instrument base. The refracting optical path device is composed of an optical prism with a parallelogram cross-section and corresponding optical fixing mechanism. The length of the parallelogram prism is determined by the height difference between the measured goniometric prism and the normal line of the reference prism in space. A high degree of parallelism is guaranteed by optical processing between the two slopes of the parallelogram. Since the parallelogram prism has the characteristic that the light incident on the slope from one side is reflected on the two slopes, the outgoing light is strictly parallel to the incident light, and this characteristic can be used to translate the normal of the prism to be measured in space. function at a specific height.

Using this space azimuth calibration method, the process of measuring the angle between the normals of the upper and lower prisms in the northward reference measurement transfer combination is as follows: the northward reference measurement transfer combination is erected on the base of the instrument, the indexing table turntable, Above the supporting seat formed by the support lower plate, the support tube and the support upper plate, press with a compression mechanism. Place the deflection optical path device above the north-facing reference measurement transmission assembly with the suspension mechanism, so that the side of the parallelogram optical prism is aligned with the reference prism below. Set up the collimating theodolite so that its optical axis is aligned with the upper light hole of the parallelogram prism, and level it. First, measure the collimation of the lower reference prism through the parallelogram optical prism, and record the azimuth angle reading of the collimation theodolite and the angle reading of the indexing table turntable at this time. Then, through the rotation of the turntable of the indexing table, the north-direction reference measurement transmission combination above it is driven to rotate 90 degrees, so that the optical axis of the collimation theodolite will be basically aligned with the normal direction of the goniometric prism inside the lower instrument. Adjust the azimuth axis of the collimating theodolite to make it collimate and measure the normal direction of the goniometric prism, record the azimuth reading of the collimating theodolite at this time, and record the precise angle of the turntable rotation of the indexing table. Calculate the difference between the readings of the collimation theodolite recorded twice, and calculate the summation with the precise angle of the turntable rotation of the indexing table to obtain the normal line of the goniometric prism inside the northward reference measurement transfer combination and the reference prism below. The space angle between.

■Beneficial effects

In the present invention, the height of the normal line of the reference prism is translated and converted by means of a deflection optical path device, and the angle of the prism normal of the northward reference measurement transfer combination is converted by an indexing table turntable, which avoids the need for two movements and reinstallation in the measurement. The hassle of setting up a collimated theodolite. It has the characteristics of fast measurement speed, short measurement time, low work intensity and high work efficiency.

■Description of drawings

Figure 1 is a schematic diagram of the implementation of the spatial azimuth calibration method.

1. Collimation theodolite 2. Bracket tube 3. Instrument base 4. Bracket lower plate 5. Bracket upper plate 6. Compression mechanism 7. Refraction optical path device 8. Suspension mechanism 9. Indexing table turntable 10. North reference measurement Transfer combination 11. Optical prism 12. Goniometric prism 13. Reference prism

■Specific implementation

The space azimuth calibration device mainly consists of a collimating theodolite 1, a support tube 2, an instrument base 3, a support lower plate 4, a support upper plate 5, a pressing mechanism 6, a refracting optical path device 7, a suspension mechanism 8 and an indexing table Turntable 9 forms. Among them, the deflection optical path device 7 and the suspension mechanism 8 are combined into a whole, and are suspended on the upper surface and side of the northward reference measurement transmission assembly 10 when in use, and the index table turntable 9 is located between the lower plate 4 of the bracket and the instrument base 3 . The refraction optical path device 7 is composed of an optical prism 11 with a parallelogram cross-section and corresponding optical fixing mechanism. The length of the parallelogram prism is determined by the height difference between the measured goniometric prism 12 and the normal line of the reference prism 13 in space. . A high degree of parallelism is guaranteed by optical processing between the two slopes of the parallelogram. Since the parallelogram prism has the characteristic that the light incident on the slope from one side is reflected on the two slopes, the outgoing light is strictly parallel to the incident light, and this characteristic can be used to translate the normal of the prism to be measured in space. function at a specific height.

When in use, erect the northward reference measurement transfer combination 10 above the support seat composed of the instrument base 3, the indexing table turntable 9, the support lower plate 4, the support tube 2, and the support upper plate 5, and press it with the pressing mechanism 6 . The deflection optical path device 7 is placed above the northward reference measurement transmission assembly 10 with the suspension mechanism 8, so that the side surface of the parallelogram optical prism 11 is aligned with the reference prism 13 below. Set up the collimating theodolite 1 so that the direction of its optical axis is aligned with the upper light hole of the parallelogram prism, and level it. First, carry out collimation measurement to the lower reference prism 13 through the parallelogram optical prism 11, and write down the azimuth reading of the collimation theodolite and the angle reading of the indexing table turntable 9 at this time. Then, through the rotation of the indexing table turntable 9, the northward reference measurement transfer assembly 10 above it is driven to rotate 90 degrees, so that the optical axis of the collimating theodolite 1 will basically align with the normal direction of the goniometric prism 12 inside the instrument. Adjust the azimuth axis of the collimating theodolite 1 to make it collimate and measure the normal direction of the goniometric prism 12, write down the azimuth reading of the collimating theodolite 1 at this time, and write down the precise angle of rotation of the indexing table turntable 9 . The difference between the readings of the collimation theodolite 1 recorded twice and the summation calculation with the precise angle of rotation of the indexing table turntable 9 can be obtained from the goniometer prism 12 inside the northward reference measurement transfer combination 10 and the reference below. The spatial angle between the normals of the prism 13.

Claims (7)

1. method for calibrating spatial azimuth angle of light collimation system, it is characterised in that: the method is demarcated based on spatial azimuth angle of light collimation system Device, described device for calibrating spatial azimuth angle of light collimation system is by collimating theodolite (1), rack tube (2), instrument base (3), support Dish (5), hold-down mechanism (6) on lower wall (4), support, and deflection light path device (7), hitch (8), circular dividing table rotating disk (9) Composition, wherein, deflection light path device (7) and hitch (8) are combined into an entirety, be suspended on north orientation benchmark and survey during use The upper surface of amount transmission combination (10) and side, circular dividing table rotating disk (9) is positioned between support lower wall (4) and instrument base (3), should Method for two the orientation angles up and down in north orientation reference measurement transmission combination (10) at the angle measurement prism of about 90 degree (12) angle and between benchmark prism (13) normal is quickly measured.

2. method for calibrating spatial azimuth angle of light collimation system as claimed in claim 1, it is characterised in that: deflection light path device (7) Optical prism (11) and corresponding optics fixed mechanism composition, these parallel four limits using a cross sectional shape to be parallelogram The length of shape prism is determined with benchmark prism (13) normal difference in height in space by tested angle measurement prism (12).

3. method for calibrating spatial azimuth angle of light collimation system as claimed in claim 2, it is characterised in that: parallelogram optics rib The collimation with height is ensured by optical manufacturing, owing to this parallelogram prism has between two inclined-planes of mirror (11) The light inclined-plane emergent light and the characteristic of incident illumination perfect parallelism, profit after the reflection on two inclined-planes is incided from side Can realize spatially moving to measured prism normal the function of certain height by this characteristic.

4. method for calibrating spatial azimuth angle of light collimation system as claimed in claim 3, it is characterised in that: by deflection light path device (7) it is placed in north orientation reference measurement transmission combination (10) top with hitch (8), makes parallelogram optical prism (11) Benchmark prism (13) below the alignment of side, sets up collimation theodolite (1) so that it is optical axis direction alignment parallelogram optics rib The top light hole of mirror (11), and flatten, right by the parallelogram optical prism (11) in deflection light path device (7) The benchmark prism (13) of lower section carries out alignment measurement, writes down collimation theodolite (1) azimuth reading and circular dividing table rotating disk now (9) angular readings.

5. method for calibrating spatial azimuth angle of light collimation system as claimed in claim 4, it is characterised in that: by circular dividing table rotating disk (9) rotation, drives north orientation reference measurement transmission combination (10) 90-degree rotation above it, so, the light of collimation theodolite (1) Axle is by angle measurement prism (12) normal direction of lower for alignment instrument internal.

6. method for calibrating spatial azimuth angle of light collimation system as claimed in claim 5, it is characterised in that: adjust collimation theodolite (1) azimuth axis so that it is the normal direction of this angle measurement prism (12) is carried out alignment measurement, writes down collimation theodolite (1) now Azimuth reading, and write down the angular readings that circular dividing table rotating disk (9) rotates.

7. method for calibrating spatial azimuth angle of light collimation system as claimed in claim 6, it is characterised in that: the collimation that twice is write down The angular readings that theodolite (1) azimuth reading carries out asking difference to calculate and rotating with circular dividing table rotating disk (9) carries out read group total, i.e. Between angle measurement prism (12) and benchmark prism (13) normal of lower section that available north orientation reference measurement transmission combination (10) is internal Space angle.