CN103245362A - Method for correcting prism error of automatic pipe-jacking measurement guide system - Google Patents

Abstract

The invention relates to the technical field of automatic measurement guide systems in underground tunnel and pipe-jacking engineering construction, and in particular relates to a method for correcting a prism error of an automatic pipe-jacking measurement guide system. The method is characterized by comprising the following steps of: (1) after a prism is installed and fixed, directly determining the distance h between the center of each total station to the center of the prism, wherein the distance is constant in the using process; (2) measuring longitudinal and transverse inclination angles of each total station by an inclination angle sensor, and after the measurement is completed at each time, reading distance-measuring and angle-measuring values by a computer, and directly reading an instant longitudinal inclination angle alpha and a transverse inclination angle beta of an inclination angle sensor of a target total station to be measured; (3) computing the coordinate and azimuth angle of the target total station by the computer; and (4) computing an error, and correcting the coordinate. The method is strict in operation, and accords with a computational logic. A pure mathematic computational formula is obtained, so that the method is general. The computation result is accurate, and high in accuracy.

Description

A kind of push pipe is measured guidance system prismatic error modification method automatically

[technical field]

The present invention relates to revise the method that is installed in the prismatic error on the total powerstation specifically for the technical field of measuring guidance system in subterranean tunnel, pipe-jacking project construction automatically, improve the precision that push pipe is measured guidance system automatically.

[background technology]

In the pipe-jacking project, promptly and accurately measuring position and the attitude of front end push bench under over long distances, is to guarantee that pipeline is by the very crucial technological means of design axis jacking.Underground pipe-driving survey generally arranges lead in the hole, the artificial transmission by the station measured from outside to inside, because manual measurement labour intensity is big, operating efficiency is low, make mistakes easily, and push pipe must remain static when measuring operation, has a strong impact on the jacking operation.

Therefore, using push pipe to measure guidance system automatically gradually measures automatically, the error of having avoided the manual measurement system to occur easily, this guidance system is made up of a plurality of automatic survey station that is installed in the pipeline, and survey station carries out tracerse survey by the station automatically according to the computer control instruction automatically.And each survey station mainly comprises an automatic total powerstation, total powerstation is a kind of prism of installing on the total powerstation that utilizes, and the laser target of installing on cooperation laser and the push bench, under the instruction of control computer software, the prism on the adjacent total powerstation is sighted and measured to total powerstation automatically, carries out measurement of angle (horizontal angle, vertical angle) and range observation (oblique distance, flat distance, the discrepancy in elevation) simultaneously.

Because total powerstation is installed in the pipeline of positive jacking, because the section of jurisdiction is kept in motion always, namely pipeline can produce rotation or banking motion in the construction, make total powerstation self instability, make prism can depart from the total powerstation center, form measuring error, the error at each station by the station accumulation, has a strong impact on the accuracy of final measurement in the tracerse survey process.

[summary of the invention]

The objective of the invention is to overcome the defective of prior art, provide a kind of and measure the prismatic error modification method of guidance system automatically about push pipe, realize the accuracy of measurement result.

To achieve the above objective; design a top tube guide system prism automatic measurement error correction method; including pipe jacking automatic measurement guidance system; said system installed in the pipe by a plurality of automatic measuring stations; each station including an automatic total stations; installed on the prism Total Station; the control computer and application tools under instruction; Total Station Total Station Auto Sight measurement on the adjacent prism; total station mounted on top of the machine jacking pipes are inside; construction pipeline will produce errors

It is characterized in that this round-off error method step is as follows:

1). after prism installs and fixes, directly measure the distance h at each total powerstation center to prism center, this value in use immobilizes.

2). the automatic built-in high precision double-shaft tilt angle sensor of total powerstation, obliquity sensor can be measured the vertical and horizontal pitch angle of total powerstation, after each measurement is finished, when computing machine reads range finding angle measurement numerical value, also directly read instant fore-and-aft tilt angle α and the superelevation angle β of measured target total powerstation obliquity sensor

3). computing machine according to range finding angle measurement numerical evaluation go out the target total powerstation coordinate (x, y) and position angle γ,

4). the error of calculation, (x, y), revised coordinate is (x ', y ') to revise coordinate

Lateral error: H=h * sin (β)

Longitudinal error: Z=h * sin (α)

Then have,

x'＝x+Hcos(γ)-Zsin(γ)＝x+h×sin(β)×cos(γ)-h×sin(α)×sin(γ)

y'＝y+Hsin(γ)+Zcos(γ)＝y+h×sin(β)×sin(γ)+h×sin(α)×cos(γ)

The present invention measures the prismatic error modification method of guidance system automatically about push pipe, the distance h at total powerstation center to the prism center of calculating according to reality and the instant fore-and-aft tilt angle α that computing machine reads and instant superelevation angle β, tentatively calculate the coordinate (x of target total powerstation, y) and position angle γ, again according to mathematical formulae carry out revised coordinate (x ', y ') calculating, this cover modification method computing is rigorous, meet computational logic, because what draw is the pure mathematics computing formula, therefore possess versatility, result of calculation possesses accuracy, precision is also high.

[description of drawings]

The out-of-level horizontal and vertical error that causes of Fig. 1 (a) total powerstation;

The out-of-level horizontal and vertical error that causes of Fig. 1 (b) total powerstation;

Fig. 2 is the structural representation of prism after installing and fixing;

The instant fore-and-aft tilt angle of Fig. 3 (a) α synoptic diagram;

The instant superelevation angle β synoptic diagram of Fig. 3 (b).

[embodiment]

Now reach specific embodiment by reference to the accompanying drawings technical scheme of the present invention is further elaborated, believe it is clearly to those skilled in the art.

At first, what scheme provided by the invention solved is because the total powerstation installation is out-of-level, thus the prism that produces and the error at total powerstation center, and this error is divided into lateral error and longitudinal error, shown in Fig. 1 (a) and Fig. 1 (b).

And at above-mentioned lateral error and longitudinal error, the correction thinking that we provide is to utilize instrument center, station to the constancy of the distance h at prism center, and the fore-and-aft tilt angle α that measures and superelevation angle β revise, and wherein the measuring and calculating of fore-and-aft tilt angle α and superelevation angle β is to rely on the built-in high precision double-shaft tilt angle sensor of automatic total powerstation to obtain.

Its concrete administration step is as follows:

1. carrying out equipment installs.After prism installs and fixes as shown in Figure 1, directly measure the distance h at each total powerstation center to prism center, this value in use immobilizes;

2. the automatic built-in high precision double-shaft tilt angle sensor of total powerstation, obliquity sensor can be measured the vertical and horizontal pitch angle of total powerstation.After each measurement is finished, when computing machine reads range finding angle measurement numerical value, also directly read instant fore-and-aft tilt angle α and the superelevation angle β of measured target total powerstation obliquity sensor.

Computing machine according to range finding angle measurement numerical evaluation go out the target total powerstation coordinate (x, y) and position angle γ.

4. the formula of the error of calculation is as follows, and (x, y), revised coordinate is (x ', y ') to revise coordinate

Lateral error: H=h * sin (β)

Longitudinal error: Z=h * sin (α)

Then have,

x'＝x+Hcos(γ)-Zsin(γ)＝x+h×sin(β)×cos(γ)-h×sin(α)×sin(γ)

y'＝y+Hsin(γ)+Zcos(γ)＝y+h×sin(β)×sin(γ)+h×sin(α)×cos(γ)。

Claims (1)

1. a push pipe is measured guidance system prismatic error modification method automatically and is comprised that push pipe measures guidance system automatically, described system is made up of a plurality of automatic survey station that is installed in the pipeline, each survey station mainly comprises an automatic total powerstation, prism is installed on the total powerstation, under the instruction of control computing machine and application tool, the prism on the adjacent total powerstation is sighted and measured to total powerstation automatically, and total powerstation is installed in the pipeline of the positive jacking of push bench, pipeline can produce error in the construction

It is characterized in that this round-off error method is as follows:

1). after prism installs and fixes, directly measure the distance h at each total powerstation center to prism center, this value in use immobilizes,

2). the automatic built-in high precision double-shaft tilt angle sensor of total powerstation, obliquity sensor can be measured the vertical and horizontal pitch angle of total powerstation, after each measurement is finished, when computing machine reads range finding angle measurement numerical value, also directly read instant fore-and-aft tilt angle α and the superelevation angle β of measured target total powerstation obliquity sensor

3). computing machine according to range finding angle measurement numerical evaluation go out the target total powerstation coordinate (x, y) and position angle γ,

4). the error of calculation, (x, y), revised coordinate is (x ', y ') to revise coordinate

Lateral error: H=h * sin (β)

Longitudinal error: Z=h * sin (α)

Then have,

x'＝x+Hcos(γ)-Zsin(γ)＝x+h×sin(β)×cos(γ)-h×sin(α)×sin(γ)

y'＝y+Hsin(γ)+Zcos(γ)＝y+h×sin(β)×sin(γ)+h×sin(α)×cos(γ)。

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