CN109579875B

CN109579875B - Calibration method for calibrating vertical line offset of electronic level

Info

Publication number: CN109579875B
Application number: CN201811552350.3A
Authority: CN
Inventors: 刘雁春
Original assignee: Dalian Senbior Surveying Instrument Technology Co ltd
Current assignee: Dalian Senbior Surveying Instrument Technology Co ltd
Priority date: 2018-12-19
Filing date: 2018-12-19
Publication date: 2022-08-02
Anticipated expiration: 2038-12-19
Also published as: CN109579875A

Abstract

The invention discloses a calibrating and calibrating method for calibrating a vertical line offset of an electronic level, which determines the offset of a vertical sensing reading central line of an electronic reader and a vertical marking line of a cross-wire plate by measuring left and right limit positions for ensuring normal reading of the electronic level, calibrates the vertical sensing reading central line of the electronic reader by using a mechanical or electronic method, and calibrates the central position of an encoding scale by using the calibrated vertical sensing reading central line of the electronic reader, thereby realizing accurate calibration of the electronic level, ensuring correct use of the electronic level and improving the field regulation capability and the working efficiency of a measurer.

Description

Calibration method for calibrating vertical line offset of electronic level

Technical Field

The invention relates to a leveling instrument correction method in the field of geodetic surveying and engineering surveying, in particular to an electronic leveling instrument collimation vertical line offset measurement calibration method.

Background

The existing leveling device consists of a level and two leveling staff. The electronic level is composed of an objective lens, a focusing lens, a horizontal sight automatic compensator, a spectroscope, a cross-hair reticle, an electronic eyepiece, an electronic reader and a display control terminal. When in measurement, the two leveling staff are respectively vertically arranged at A, B points on the ground, the leveling instrument is arranged at the middle position of A, B points, the horizontal sight provided by the leveling instrument telescope sight axis (namely the connecting line of the cross wire intersection point and the objective lens optical center) is utilized to respectively and accurately read the elevation values of the two leveling staff, the difference of the measured elevation values is the leveling elevation difference of the two points A, B on the ground, and if the elevation of one point is known, the elevation of the other point can be calculated by the elevation difference. The electronic level is characterized in that an electronic reader (CCD) capable of identifying a coding scale is arranged on one side of a sighting axis, one path of light entering from an objective lens passes through a spectroscope to reach a cross-wire plate (eyepiece) and forms an image on a display screen of a display control terminal, and the other path of light passes through the spectroscope to reach the electronic reader (CCD) after being split by the spectroscope and then is rotated by 90 degrees. In order to ensure the correct reading of the electronic reader (CCD), the electronic reader (CCD) and the cross-silk plate (ocular lens) are required to be strictly vertical relative to the spectroscope, and the vertical sensing reading central line of the coding scale read by the electronic reader (CCD) is consistent with the vertical marked line of the cross-silk plate. However, due to the influence of factors such as instrument manufacturing process and vibration, a phenomenon that a vertical sensing reading central line of an electronic reader (CCD) reading code scale is inconsistent with a vertical marking line of the cross-hair plate sometimes occurs, and an included angle exists on a horizontal plane, which is called as a horizontal collimation offset. When the observation distance is close, the collimation influence on the electronic level is not large, and when the observation distance is far, if a measurer still performs collimation according to the vertical marking of the cross wire plate, the electronic level can not accurately collimate the coding scale and can not normally measure. Because the cross wire plate vertical marked line of the level is fixed, if the level is returned to a factory for maintenance, the position of an electronic reader (CCD) can only be adjusted, so that the maintenance is troublesome, and the working efficiency of a measuring unit is influenced.

Disclosure of Invention

The invention aims to solve the technical problems in the prior art and provides a calibration method for the alignment vertical line offset measurement of an electronic level.

The technical solution of the invention is as follows: an electronic level collimation vertical line deviation measurement calibration method comprises an electronic level and a coding scale, and is characterized by comprising the following steps in sequence:

a. the electronic level and the coding staff are respectively placed on two points on the ground by utilizing the auxiliary foot stand, and the electronic level is leveled, so that the coding staff is vertical to and faces the electronic level;

b. rotating the electronic level to enable the vertical marking of the cross wire plate to be aligned with the center of the coding scale;

c. rotating the electronic level to the left to determine a left limit position of normal reading of the electronic reader and determine a left rotation amount A, wherein the left rotation amount A is set as a positive value, and a grid value away from a vertical marking of the cross-hair plate or a rotation angle relative to the vertical marking of the cross-hair plate is taken as a unit;

d. rotating the electronic level to the right to determine a right limit position of normal reading of the electronic reader and determine a right rotation amount B, wherein the right rotation amount B is set to be a negative value, and a grid value from a vertical marking of the cross-hair plate or a rotation angle relative to the vertical marking of the cross-hair plate is taken as a unit;

e. calculating the average value of the rotation quantity A and the rotation quantity B, namely the offset delta from the midpoint position O of the left limit position and the right limit position to the vertical marking of the cross wire plate; and determining a midpoint position O according to the offset delta by taking the vertical marked line of the cross-wire plate as a reference: if the offset delta is a positive value, the midpoint position O is positioned on the left side of the vertical reticle of the cross-hair plate, the offset delta is a negative value, and the midpoint position O is positioned on the right side of the vertical reticle of the cross-hair plate;

f. and marking a vertical marking line at a midpoint position O on a display screen of the display control terminal of the electronic level, wherein the vertical marking line is a vertical sensing reading central line of the calibrated electronic reader.

According to the invention, the offset between the vertical sensing reading central line of the electronic reader and the vertical marking line of the cross-wire plate is determined by measuring the left and right limit positions for ensuring the normal reading of the electronic level, the vertical sensing reading central line of the electronic reader is calibrated by using a mechanical or electronic method, and the calibrated vertical sensing reading central line of the electronic reader is used for aiming at the central position of the coding scale, so that the accurate aiming of the electronic level is realized, the correct use of the electronic level is ensured, and the field regulation capability and the working efficiency of a measurer are improved.

Drawings

Fig. 1 and 2 are schematic structural views of a level according to an embodiment of the present invention.

FIG. 3 is a schematic diagram of a method for determining and calibrating the signal according to an embodiment of the present invention.

Detailed Description

Example (b):

the invention relates to a method for measuring and calibrating vertical line offset of an electronic level, which comprises the following steps of: the device is provided with a shell 1, wherein an objective lens 2, a focusing lens 3, an automatic horizontal sight compensator 4, a spectroscope 5, an electronic reader 6 (namely a CCD image decoding and reading device matched with a coding leveling staff for use), a cross wire reticle 7 and an electronic eyepiece 8 are arranged in the shell 1, a display and control terminal 9 and a leveling instrument 10 are also arranged on the shell 1, the display and control terminal 9 consists of a display screen and keys, and is also provided with a coding staff 11 which is the same as that of the prior art; the method comprises the following steps of:

a. according to the method in the prior art, the electronic level and the coding staff 11 are respectively placed at two points on the ground by using the auxiliary foot stool, the electronic level is leveled, the coding staff 11 is vertical and faces the electronic level, a display screen of a display control terminal of the electronic level is observed, and the observation is carried out downwards according to the diagram shown in FIG. 3;

b. rotating the electronic level to enable the vertical marking of the cross wire plate to be aligned with the center of the coding scale 11;

c. the electronic level is rotated to the left to determine a left limit position 6-2 of normal reading of the electronic reader and determine a left rotation amount A, the left rotation amount A is set to be a positive value, a grid value from a vertical marking of the cross wire plate is taken as a unit, and the rotation amount A =3 of the left limit position is assumed in the embodiment;

d. the electronic level is rotated rightwards to determine a right limit position 6-3 of normal reading of the electronic reader and determine a right rotation amount B, the right rotation amount B is set as a negative value, and the grid value from the vertical marking of the cross wire plate or the rotation angle relative to the vertical marking of the cross wire plate is taken as a unit, and the rotation amount B of the right limit position is assumed to be = -1 in the embodiment;

e. calculating the average value of the rotation quantity A and the rotation quantity B to be 1, namely the offset delta =1 from the midpoint position O of the left limit position 6-2 and the right limit position 6-3 to the vertical marking of the cross-hair plate, determining the midpoint position O according to the offset delta by taking the vertical marking of the cross-hair plate as a reference, and positioning the midpoint position O at the 1-grid value on the left side of the vertical marking of the cross-hair plate because the offset delta is a positive value;

f. marking a vertical marking 6-1 at a midpoint position O on a display screen of a display control terminal of the electronic level, wherein the vertical marking 6-1 is a vertical sensing reading central line of a calibrated electronic reader; the method for marking the vertical marked line 6-1 can adopt the following two modes:

1. the transparent paper tape with the vertical marking 6-1 is pasted on a display screen of the display control terminal, and the vertical marking 6-1 corresponds to the middle point position O;

2. and generating an electronic marking line of the vertical sensing reading central line of the electronic reader on the image display screen of the display control terminal by utilizing a programming technology according to the offset delta.

In the later measuring process, the calibrated vertical sensing reading center line of the electronic reader can be directly used for aiming at the center position of the coding scale, so that the accurate aiming of the electronic level is realized.

Claims

1. An electronic level collimation vertical line deviation measurement calibration method comprises an electronic level and a coding scale, and is characterized by comprising the following steps in sequence:

a. the electronic level and the coding staff gauge (11) are respectively placed at two points on the ground by utilizing the auxiliary foot stool, and the electronic level is leveled, so that the coding staff gauge (11) is vertical and faces to the electronic level;

b. rotating the electronic level to enable the vertical reticle of the cross wire plate to be aligned with the center of the coding scale (11);

c. rotating the electronic level to the left to determine a left limit position (6-2) of the normal reading of the electronic reader and determine a left rotation amount A, wherein the left rotation amount A is set to be a positive value, and a grid value away from a vertical marking of the cross wire plate or a rotation angle relative to the vertical marking of the cross wire plate is taken as a unit;

d. rotating the electronic level to the right to determine a right limit position (6-3) of the normal reading of the electronic reader and determine a right rotation amount B, wherein the right rotation amount B is a negative value and takes a grid value away from the vertical marking of the cross-hair plate or a rotation angle relative to the vertical marking of the cross-hair plate as a unit;

e. calculating the average value of the rotation quantity A and the rotation quantity B, namely the offset delta from the midpoint position O of the left limit position (6-2) and the right limit position (6-3) to the vertical marking of the cross plate; and determining a midpoint position O according to the offset delta by taking the vertical marked line of the cross wire plate as a reference: if the offset delta is a positive value, the midpoint position O is positioned on the left side of the vertical reticle of the cross-hair plate, the offset delta is a negative value, and the midpoint position O is positioned on the right side of the vertical reticle of the cross-hair plate;

f. and marking a vertical marking (6-1) at a midpoint position O on a display screen of the display control terminal of the electronic level, wherein the vertical marking (6-1) is a vertical sensing reading central line of the calibrated electronic reader.