CN206540548U - The total powerstation of function is measured with instrument high precision - Google Patents

Abstract

The technical problem to be solved by the utility model is how to measure the instrument height of the total station accurately and conveniently. The total station with the instrument's high-precision measurement function includes a total station, a telescopic rod and a displacement meter. The telescopic rod is installed vertically under the base of the total station. The telescopic rod is a hollow structure, and the displacement meter is installed outside the telescopic rod. The utility model has the following beneficial effects: after the total station is leveled, the telescopic rod is strictly perpendicular to the two planes of the base and the earth, and the measurement accuracy of the magnetostrictive displacement meter is very high, which jointly guarantees the accuracy of the elevation of the measured instrument; The total station can be used for high-precision triangular elevation measurement under various conditions, and can replace leveling measurement under complex conditions; in addition, it can perform settlement monitoring in deformation monitoring.

Description

Total station with high precision measurement function of the instrument

technical field

The utility model relates to the technical field of measurement, in particular to the measurement of the instrument height of a total station.

Background technique

The instrument height is the height from the ground reference point where the total station is set up to the center point of the instrument eyepiece. The high precision of the total station instrument directly determines the precision of the measured coordinate elevation, which has a great influence on the entire measurement precision.

(1) Steel tape measurement method

The most traditional method of measuring instrument height. The height of the instrument is the vertical distance from the measurement control point to the center of the instrument. Since the direct measurement is not a plane relationship, there is absolutely an error. In addition, the measurement error of the steel tape is relatively large.

(2) Suspension height measurement method

1. Set up the total station far away from the measurement object, so that the vertical angle from the station telescope to the high point is less than 45 degrees. Because if the vertical angle is large, the height difference calculated by the trigonometric function will have a large error. 2. Set up a prism at the datum point projected onto the ground from the suspended elevation. The connection line between the measuring station and the ground reference point should preferably intersect vertically with the direction of the suspended height measurement object. 3. Enter the suspension height measurement program of the total station, input the prism height, aim at the prism and press the measurement key to observe the distance between the measuring station and the reference point prism. 4. Loosen the brake in the vertical direction of the telescope, aim at the suspension point above the prism, and the instrument will display the height difference from the corresponding ground point to the suspension height with the rotation of the vertical dial. The operation procedures of this measurement method are cumbersome, and the errors mainly include laser ranging errors, trigonometric function errors, and errors caused by the introduced prism.

(3) Laser measurement method

Using the laser measurement point function of the instrument itself, although the laser measurement accuracy is higher than the above two methods, but because the light spot hits the inside of the crosshair instead of the highest point of the reference point, system errors are brought about, and the overall measurement accuracy is limited. .

The measurement accuracy of the above measurement methods is millimeter level, which is not suitable for occasions that require high parameters of precise instruments. In order to meet some high-precision measurement occasions, high-precision, simple and easy-to-use equipment and methods for measuring the height of total station instruments are needed.

Contents of the invention

The technical problem to be solved by the utility model is how to measure the instrument height of the total station accurately and conveniently.

The total station with the instrument's high-precision measurement function includes a total station, a telescopic rod and a displacement meter. The telescopic rod is installed vertically under the base of the total station. The telescopic rod is a hollow structure, and the displacement meter is installed outside the telescopic rod. Preferably, the telescopic rod is formed by connecting two short rods in series. Preferably, the cross section of the telescopic rod is an equilateral triangle. Preferably, the displacement meter is a magnetostrictive displacement meter, and its two ends are respectively installed at the upper and lower ends of the telescopic rod. Preferably, the bottom end of the telescopic rod is a base, which is installed on the lower end of the telescopic rod. Preferably, the substrate is a transparent glass cylindrical substrate. Preferably, the base is removable and replaceable. Preferably, the centering laser is mounted vertically under the base, within the telescoping pole. Preferably, the cross-section of the upper short rod of the telescopic rod is larger than that of the lower short rod, and there is a locking screw on the upper short rod. After the telescopic rod is shortened, tighten the locking screw to fix the position of the two short rods. Due to the adoption of the above technical scheme, the utility model has the following beneficial effects: after the total station is leveled, the telescopic rod is strictly perpendicular to the two planes of the base and the earth, and the measurement accuracy of the magnetostrictive displacement meter is very high, which jointly guarantees all The height accuracy of the measuring instrument; the total station can be applied to high-precision triangular elevation measurement under various conditions, and can replace leveling measurement under complex conditions; in addition, it can perform settlement monitoring in deformation monitoring.

Description of drawings

Fig. 1 is a schematic diagram of the overall structure of the total station with the instrument's high-precision measurement function;

Fig. 2 is a structural schematic diagram of the connection part between the total station and the telescopic rod;

Fig. 3 is a schematic diagram of the partial structure of the telescopic rod and the displacement meter;

In the figure: 1. Total station, 2. Telescopic rod, 3. Magnetostrictive displacement meter, 4. Base, 5. Transparent glass cylindrical base, 6. Centering laser, 7. Locking screw.

detailed description

Embodiment 1, as shown in accompanying drawing 1-3.

The total station with the instrument's high-precision measurement function includes a total station, a telescopic rod and a displacement meter. The telescopic rod is installed vertically under the base of the total station. The telescopic rod is a hollow structure, and the displacement meter is installed outside the telescopic rod. Preferably, the telescopic rod is formed by connecting two short rods in series. The reason for only connecting two sections of short rods in series is that, firstly, the height of the telescopic rod can be adjusted below 80mm by two sections of series connection, which is enough for general use; greater measurement error. Preferably, the cross section of the telescopic rod is an equilateral triangle. The reason why the cross-section of the telescopic rod is an equilateral triangle is that, under the same material and quantity, the triangle is more stable than a polygonal structure such as a circle, and is less prone to bending deformation. Preferably, the displacement meter is a magnetostrictive displacement meter, and its two ends are respectively installed at the upper and lower ends of the telescopic rod.

The magnetostrictive sensor is a high-precision displacement sensor developed by using the "magnetostrictive principle". It adopts a non-contact measurement method, and the service life of the sensor will not be reduced due to friction, wear and other reasons. It has good environmental adaptability, reliability and stability, and is extremely convenient to use. Compared with conductive rubber, LVDT, resistive displacement sensor and other products, it has obvious advantages. Its output signal is a true absolute position output, not a proportional or re-amplified signal, so there is no signal drift or value change, so it does not need to be remarked and maintained regularly like other displacement sensors; It is because its output signal is an absolute value, so if the power supply is interrupted and reconnected, it will not pose a problem to data reception, and there is no need to return to zero. The main reason for choosing the magnetostrictive displacement meter is that its measuring range can be selected from 50mm to 8000mm, and the suitable measuring range in this case can be about 1000mm, and its accuracy can be as high as 0.002%. The measurement error converted into 1000mm is 1000×0.002mm= 0.00125mm, which is sufficient for the high measurement accuracy of general instruments. Preferably, the bottom end of the telescopic rod is a base, which is installed on the lower end of the telescopic rod. Preferably, the substrate is a transparent glass cylindrical substrate. Preferably, the base is removable and replaceable. Preferably, the centering laser is mounted vertically under the base, within the telescoping pole. The laser can penetrate the glass substrate and align with the ground reference point, avoiding the influence of the existence of the telescopic rod on the laser alignment. Preferably, the cross-section of the upper short rod of the telescopic rod is larger than that of the lower short rod, and there is a locking screw on the upper short rod. After the telescopic rod is shortened, tighten the locking screw to fix the position of the two short rods. How to use the total station: a. Set up the total station, and the telescopic rod is shortened at this time: b. Centering: c. Rough flat: d. Fine flat: e. Measure the height of the instrument and stretch the telescopic rod Make its bottom touch the ground datum and record the reading displayed by the displacement gauge.

In order to prevent the installation of the telescopic rod from affecting the centering and leveling of the total station, the telescopic rod is installed under the base of the total station after the total station is erected and before centering and leveling, or is fixed with the total station all the time. When loosening the clamping screw to extend the telescopic rod, be sure to operate with light hands and do not touch the total station. When the telescopic pole is extended close to the reference point on the ground, carefully observe and confirm that the operation does not affect the centering and leveling of the total station, otherwise stop extending the telescopic pole and re-center and level. In order to further avoid the influence of hand operation, the locking device can also be released by remote control, allowing the short rod in the lower section of the telescopic rod to freely drop to the ground reference point by gravity.

Claims (9)

1. the total powerstation of function is measured with instrument high precision, it is characterized in that including total powerstation, expansion link and displacement meter, expansion link It is vertically mounted under the pedestal of total powerstation, expansion link is hollow structure, displacement meter is arranged on the outside of expansion link.

2. the total powerstation with instrument high precision measurement function according to claim 1, it is characterized in that expansion link is by two Section quarter butt concatenation is formed.

3. the total powerstation with instrument high precision measurement function according to claim 1 or 2, it is characterized in that expansion link Cross section is equilateral triangle.

4. the total powerstation with instrument high precision measurement function according to claim 1 or 2, it is characterized in that displacement is calculated as Magnetostrictive displacement meter, its two ends are separately mounted to expansion link upper and lower ends.

5. the total powerstation with instrument high precision measurement function according to claim 1, it is characterized in that expansion link bottom For substrate, it is arranged on expansion link lower end.

6. the total powerstation with instrument high precision measurement function according to claim 5, it is characterized in that substrate is transparent Glass cylinder shape substrate.

7. the total powerstation with instrument high precision measurement function according to claim 5 or 6, it is characterized in that substrate is removable Unload replacing.

8. the total powerstation with instrument high precision measurement function according to claim 1, it is characterized in that alignment laser It is vertically mounted under pedestal, in expansion link.

9. the total powerstation with instrument high precision measurement function according to claim 2, it is characterized in that expansion link epimere The cross section of quarter butt is more than hypomere quarter butt, and having on epimere quarter butt screens screw, expansion link to screw screens screw after shortening will two Section quarter butt position is fixed.