CN104316082B - A kind of theodolite outfield infinity range correction method - Google Patents

Abstract

A kind of infinity range correction method in theodolite outfield of the invention, solves the technical problem that prior art has larger error to the focusing of big-and-middle-sized theodolite outfield；The present invention comprises the following steps：Step one：Self calibration is carried out to auto-collimation collimator using high precision plane mirror：Level crossing is placed along auto-collimation collimator optical axis direction, and minute surface is vertical with the optical axis of auto-collimation collimator, the position of graticle on adjustment auto-collimation collimator, until the return picture of level crossing on graticle is most clear；Step 2：Using the auto-collimation collimator after being calibrated as infinity apart from benchmark, pair warp and weft instrument focusing system carries out infinity range correction：The optical axis of theodolite is parallel with the direction of auto-collimation collimator optical axis, and the clear aperture of theodolite and the clear aperture of auto-collimation collimator are mutually corresponding, pass through the optical system observing graticle image of theodolite, and the position of the focusing component on theodolite is adjusted, until graticle image is most clear.

Description

A method for correcting the infinite distance distance in the outer field of the theodolite

technical field

The invention belongs to the field of photoelectric measurement and control, and in particular relates to a method for correcting the infinite distance in the outer field of a theodolite.

Background technique

At present, for the focusing of large and medium-sized theodolites, a combination of distance focusing and temperature focusing is mostly used. There are many factors that affect the accuracy of temperature focusing, including the non-uniform linear expansion coefficient due to the diversity of composite structure materials, the uneven influence of temperature on different layers, and the difficulty in determining the position of the temperature sensor. Furthermore, there is a large error in the temperature focusing zero point obtained through theoretical calculation.

Contents of the invention

The object of the present invention is to provide a method for correcting the infinite distance in the field of theodolite, which solves the technical problem of relatively large errors in the field focusing of large and medium-sized theodolites in the prior art.

A method for correcting the infinite distance in the external field of the theodolite of the present invention:

Step 1: Use a high-precision flat mirror to self-calibrate the self-collimating collimator:

The high-precision plane mirror is placed along the optical axis of the self-collimation collimator, and the mirror surface of the high-precision plane mirror is parallel to the optical axis of the self-collimation collimator. Adjust the position of the reticle on the self-collimation collimator until the reticle The return image of the high-precision flat mirror is the clearest,

The return image of the plane mirror on the reticle changes from blurred to clear, and then from clear to blurred during the process of adjusting the position of the reticle;

Step 2: Use the self-collimated collimator calibrated in step 1 as the infinity distance reference to correct the theodolite focusing system for infinity distance:

The optical axis of the theodolite is parallel to the direction of the optical axis of the self-collimating collimator, and the light aperture of the theodolite corresponds to the light aperture of the self-collimating collimator, and the reticle image is observed through the optical system of the theodolite, and adjusted Position the focusing assembly on the theodolite until the reticle image is clearest,

During the process of adjusting the position of the theodolite focusing assembly, the image of the reticle changes from blurred to clear, and then from clear to blurred.

Beneficial technical effects of the present invention: the present invention first self-calibrates the self-collimating collimator through a high-precision plane mirror, and then uses the calibrated self-collimating collimator to correct the theodolite at infinite distance in the external field, thereby reducing the temperature change to the greatest extent The impact on the focusing system ensures the focusing accuracy of the theodolite.

Description of drawings

Fig. 1 is the flow chart of a kind of theodolite outer field infinite distance correction method of the present invention;

Fig. 2 is the self-calibration schematic diagram of the self-collimating light pipe of a kind of theodolite external field infinite distance correction method of the present invention;

Fig. 3 is the outer field infinite distance correction schematic diagram of the theodolite of a kind of theodolite outer field infinite distance correction method of the present invention;

Among them, 1. Theodolite, 2. High-precision plane mirror, 3. Self-collimating collimator.

detailed description

The present invention will be further elaborated below in conjunction with the accompanying drawings.

Referring to accompanying drawing 1 and accompanying drawing 2, a kind of theodolite external field infinite distance correction method of the present invention:

Step 1: self-calibrating the self-collimating collimator 3 by using a high-precision plane mirror 2;

The high-precision plane mirror 2 is placed along the direction of the optical axis of the self-collimating collimator 3, the mirror surface of the high-precision plane mirror 2 is parallel to the optical axis of the self-collimating collimator 3, and the reticle on the self-collimating collimator 3 can be positioned along the Move in the direction of the optical axis of the self-collimating collimator 3, and adjust the position of the reticle until the return image of the high-precision flat mirror 2 on the reticle reaches the clearest, that is, the self-calibration of the self-collimating collimator 3 is completed ;

The return image of the plane mirror on the reticle changes from fuzzy to clear and then from clear to fuzzy during the process of adjusting the position of the reticle.

Step 2: using the calibrated autocollimated collimator 3 as the infinity distance reference, and performing infinity distance correction on the theodolite 1 focusing system;

Referring to accompanying drawing 3, the optical axis of theodolite 1 is parallel with the direction of self-collimating collimator 3 optical axes, and the light aperture of theodolite 1 and the light aperture of self-collimation collimator 3 correspond to each other, by theodolite 1 The optical system observes the image on the reticle of the self-collimating collimator 3, and adjusts the position of the focusing assembly on the theodolite 1 until the image on the reticle is clearest, that is, the correction of the infinite distance of theodolite 1 is completed .

During the process of adjusting the position of the theodolite focusing assembly, the image of the reticle changes from blurred to clear, and then from clear to blurred.

Claims (1)

1. a kind of theodolite outfield infinity range correction method, it is characterised in that

Step one：Self calibration is carried out to auto-collimation collimator (3) using high precision plane mirror (2)：

High precision plane mirror (2) is placed along auto-collimation collimator optical axis direction, high precision plane mirror (2) minute surface and auto-collimation The optical axis of parallel light tube (3) is parallel, the position of graticle on adjustment auto-collimation collimator (3), until high accuracy on graticle It is most clear that the return picture of level crossing (2) reaches,

The return picture of level crossing image during the position of regulation graticle is clear by obscuring on the graticle, then by clear It is clear to arrive fuzzy；

Step 2：Using the auto-collimation collimator (3) after being calibrated in step one as infinity apart from benchmark, pair warp and weft instrument (1) focusing system carries out infinity range correction:

The optical axis of theodolite (1) is parallel with the direction of auto-collimation collimator (3) optical axis, and the clear aperture of theodolite (1) with The clear aperture of auto-collimation collimator (3) is mutually corresponded to, by the optical system observing graticle image of theodolite (1), and The position of the focusing component on theodolite (1) is adjusted, until graticle image is most clear,

Graticle image image during the position of regulation theodolite focusing component is clear by obscuring, then by clear It is clear to arrive fuzzy.