Do total stations need to be calibrated frequently? How often the total station is calibrated

It is best to calibrate the total station frequently. The calibration mentioned here does not necessarily mean that it is sent to the verification station or calibration place. You can use the prism to make corrections yourself.

The reasons are as follows: 1) Whether the total station uses prism-free (laser light source) or prism ranging (laser light source or non-laser light source), because it uses electromagnetic waves for ranging, and electromagnetic waves have a certain impact on the ranging accuracy due to the drift of ranging frequency with temperature and the aging of circuit components.

2) Due to the vibration of the instrument during transportation, it will cause some parts to loosen, especially the changes in indicators such as 2C, index difference I, bracket difference I, etc.

These require calibration of the instrument.

Here are a few suggestions for you::

1) Use the instrument manual (now the total station manual is available) to perform additive constant correction. It is to use the reflection prism at both ends of the 100m distance, set up the total station in the middle to measure the two target records, and then move the station to move a certain distance (still located in the line position of the two targets) for measurement.

2) For the detection of various indicators, such as 2C, index difference I, and bracket difference I, a total station and prism can be set up at a distance of 20m to observe and record data. The comparison of the two differences in the inverted mirror measurement record was verified.

If you want to expand your understanding, you can refer to the encyclopedia "total station" and other entries.

Inspection and Correction of Total Station Reticles (Episode 8).

The total station is calibrated every year, and the total station testing center that has been verified and calibrated will issue a verification certificate, which is pasted on the body of the total station, and the verification and calibration date is indicated on the certificate.

The leveling axis of the alignment part should be perpendicular to the vertical axis of the parallel and closed inspection and correction inspection, first the instrument is roughly leveled, rotate the alignment part to make its leveling tube parallel to the line of any two foot spirals, adjust the foot spiral to center the bubble, and then rotate the alignment part 180 degrees, if the forest shielding bubble is still centered in this state, it means that the conditions are met, otherwise the correction should be carried out.

The purpose of the correction is to make the horizontal tube axis perpendicular to the vertical axis. That is, use the correction needle to dial the correction screw at one end of the leveling tube to make the bubble retreat half to the middle position. In order to make the vertical axis upright, the bubble can be centered with a foot spiral This inspection and correction must be repeated until the conditions are met.

The following is the stakeout process for the total station:

1. Set up a station. Instruments are placed on the control points and aligned.

Set the station parameters, enter the station coordinates, and the instrument height.

2. Orientation. > telescope is aimed in the rear-looking direction.

Set the backsight parameters and enter the backview coordinates.

After completing the view, you can directly measure the coordinates of the backsight point as a check.

3. Lofting. > select the lofting function in the menu (most instruments are in the main menu).

Enter the coordinates of the lofting point, and the instrument will display the distance and angle parameters after confirmation.

Turn the telescope according to the display prompts, and fix it when the horizontal angle deviation is 0.

Instruct the prism runner to walk in the direction of the line of sight, and estimate where he should go according to the distance given by the instrument.

Measure once. The instrument will show the difference in distance, generally negative numbers indicate a move in the direction of the total station total station, and positive numbers move in the opposite direction.

Measure again. Repeat this step until you know that the distance difference meets the requirements.

This is the point to be staked, measure the coordinates, and record.

Extended Materials. Total station, that is, total station electronic rangefinder (electronic

TotalStation) is a high-tech measuring instrument integrating light, machinery and electricity, and is a surveying and mapping instrument system integrating horizontal angle, vertical angle, distance (oblique distance, flat distance) and height difference measurement functions. Compared with the optical theodolite, the electronic theodolite replaces the optical dial with a photoelectric scanning dial, and replaces the artificial optical micrometer readings with automatic recording and display of the readings, which simplifies the operation of angle measurement and avoids the generation of reading errors. Because it can complete all the measurement work on the station by placing the instrument at one time, it is called a total station.

It is widely used in the field of precision engineering measurement or deformation monitoring such as large-scale above-ground buildings and underground tunnel construction.

With the continuous development and application of computer technology, as well as the special requirements of users and the application of other industrial technologies, a new period of development has emerged in the total station, and there is a total station with memory, waterproof, explosion-proof, computer and so on.

The world's most accurate total station: angle measurement accuracy (standard deviation of the direction of a return) seconds, ranging accuracy.

Using ATR (Auto

targets

recognition, automatic target recognition) function, which works both day and night (without lighting). Total stations have achieved unbelievable accuracy in angle and distance measurements, can be operated manually or automatically, can be operated remotely from a distance or under the control of an on-board application, and can be used in applications such as precision engineering measurements, deformation monitoring, and mechanically guided control with virtually no tolerance.

A total station is a tool used to measure objects such as buildings or grounds, and its use is as follows:1Attaching the tripod:

Place the tripod in the area where you need to measure, and then place the total station on the tripod to fix it. 2.Calibrate the instrument:

Turn on the total station and calibrate it, typically, it needs to be calibrated in both horizontal and vertical directions to ensure the accuracy of the measurement results. 3.Set the measurement parameters:

Set the measurement parameters, such as the measurement distance, angle, height, etc., according to the specific situation of the measurement, so that the total station can accurately measure. 4.Take measurements:

Aim the total station at the target to be measured, and then press the measurement button to measure, and the total station will automatically record the measurement result and display it on the screen. 5.Analyze and process data:

The measurement results are exported and analyzed for processing, so as to obtain accurate measurement data and charts, which provide reference and basis for subsequent engineering design and construction. It should be noted that the total station is a relatively professional measurement tool, and relevant training and learning are required before using the noise to ensure that the measurement work is carried out correctly and safely. At the same time, when using a total station, it is also necessary to pay attention to protecting the instrument and its accessories to avoid damage and errors.

Total station leveling and bubble correction method of correct leveling instrument:

1) Erection: Set the instrument on a stable tripod and tighten the center spiral.

2) Rough flat: look at the round bubbles (the accuracy is relatively low, generally 1 point), and rotate the 3 foot spirals of the instrument respectively to roughly level the instrument.

3) Jingping: make the tubular level (or long bubble tube) on the alignment part of the instrument parallel to any pair of foot spirals, rotate the two foot spirals to center the bubble (it is best to use the left thumb method, that is, the left and right hands rotate the two foot spirals at the same time, and the two thumbs move in the opposite direction, and the left thumb direction is the same as the bubble movement direction of the bubble in the bubble tube. ）；Then, rotate the alignment part 90° and rotate the other foot spiral to center the long bubble tube.

4) Inspection: rotate the instrument by 90°, if the bubble of the long bubble tube is still centered, it means that it has been leveled; If there is a deviation, repeat step (3). Normally, repeating 1 or 2 times will be fine.