CN102278970A - Technique for monitoring positioning and deformation based on angular distance difference of total station - Google Patents

Abstract

The invention discloses a technique for monitoring positioning and deformation based on the angular distance difference of a total station. In the technique disclosed by the invention, the total station is used as a data acquisition tool; the average distance error rate per unit and the average angle error rate per unit are solved by utilizing an angular distance difference method according to the known distance and known angle of a fixed point and the measuring distance and measuring angle obtained by actual measurement; the actual distance and angle of a monitoring point after being modified are obtained according to the error distribution of the observation distance and angular dimension of the monitoring point; the monitoring point coordinates obtained by observation for first time are used as initial coordinates according to the accurate coordinates of the monitoring point obtained by the coordinates of the fixed point; and the deformation conditions of the monitoring point are judged by comparing the monitoring point coordinates of the observation for each time with the initial coordinates, thus a reliable deformation degree can be obtained and the accuracy level of the monitoring method is greatly improved.

Description

A kind of location technology for deformation monitoring based on total powerstation angular distance difference

One, technical field

The present invention relates to a kind of method of deformation monitoring, particularly a kind of location technology for deformation monitoring based on total powerstation angular distance difference.

Two, background technology

Up to the present, deformation monitoring method is mainly made a general reference means such as high precision ground monitoring technology, photogrammetric survey method and GPS monitoring system.

1. ground surface monitoring method mainly be meant with high precision measuring instrument (as transit, stadimeter, spirit-leveling instrument, total powerstation etc.) take measurement of an angle, the variation of the length of side and elevation measures distortion, they are main means of present deformation monitoring.

2. measure the distortion of engineering works, structures, sliding mass etc. with the ground photogrammetric survey method, around deformable body, select stable point exactly, on these aspects, settle video camera, and deformable body photographed, obtain the two dimension or the three-dimensional coordinate of impact point on the deformable body then by interior industry measurement and data processing, the relatively more different coordinates of impact points constantly obtain their displacement.But the photogrammetric survey method cost is higher, and measurement result is unreliable, is not suitable for accurate deformation monitoring.

3. GPS and computer technology, data communication technology and data processing and analytical technology are carried out integratedly, can realize from data acquisition, transmission, manage the robotization of deformation analysis and forecast, reach the purpose of remote online network real-time monitoring.But gps signal is subjected to various influences easily, and data processing is cumbersome, spends greatlyyer, very is unfavorable for field work and obtains data more fast.

Three, summary of the invention

In order to overcome a lot of troubles and inconvenience that GPS, RTK technology bring inevitably in deformation monitoring, increase work efficiency, the purpose of this invention is to provide a kind ofly based on total powerstation angular distance difference location technology for deformation monitoring, it has overcome the above-mentioned shortcoming that existing method exists.

The object of the present invention is achieved like this: be that instrument takes measurement of an angle and distance with the total powerstation, by the accurate location of angular distance difference realization to monitoring point in the deformation monitoring, judge the distortion situation of monitoring point, concrete steps are as follows:

1. according to field condition three stable reference point O, A, B being set is known point, and wherein the O point is the survey station point, respectively can with monitoring point S ₁, S ₂... S _nIntervisibility;

2. settling total powerstation on survey station point O, is orientation point with the A point, and aiming A point also is changed to 0 ° 00 ' 00 with horizontal angle ", measure survey station point O and reference point A, B, monitoring point S respectively with total powerstation _i(i=1,2 ..., n) the horizontal range D between _OA, D _OB,

(i=1,2 ..., n), measure OA and OB, OS _i(i=1,2 ..., the n) horizontal sextant angle between

3. according to known point A (X _A, Y _A), O (X _O, Y _O), B (X _B, Y _B) can calculate the distance L of OA ₀, OB distance L ' ₀, OA and OB horizontal sextant angle β ₀, with the distance D of the actual known point that records _OAAnd D _OBCarry out difference and obtain Δ D _OA=L ₀-D _OAWith Δ D _OB=L ' ₀-D _OB, according to formula $\mathrm{\Δd}=\frac{1}{2}(\mathrm{\Δ}{D}_{\mathrm{OA}}/D_{\mathrm{OA}}+\mathrm{\Δ}{D}_{\mathrm{OB}}/D_{\mathrm{OB}})$ Try to achieve the average per unit distance error rate Δ d of distance, error rate is assigned to the measuring distance D of each monitoring point according to distance length _OSi(i=1,2 ..., n) among, calculate each monitoring point layback and count V _i=D _OSi* Δ d, the distance D of the monitoring point after obtaining at last correcting ' _OSi=D _OSi+ V _i(i=1,2 ..., n);

4. with the OA that records and the horizontal sextant angle β between the OB _AOBWith known level angle β ₀Carry out difference and obtain Δ β=β ₀-β _AOB, try to achieve angle per unit error rate Δ β '=Δ β/β _AOB, according to angular dimension error rate is assigned to each and measures horizontal sextant angle

Among, calculate each monitoring point correction on angles number Angle after the correction of the monitoring point that obtains ${\mathrm{\β}}_{{\mathrm{AOS}}_i}^{\′}={\mathrm{\β}}_{{\mathrm{AOS}}_i}+W_i,(i=\mathrm{1,2}\·\·\·\·\·\·,n);$

5. the distance D after will correcting ' _OSiAnd angle-Du

Azimuth angle alpha with OA _O-AThe substitution formula

Just obtain S _i(i=1,2 ..., coordinate n)

$\left\{\begin{array}{c}{X}_{\mathrm{Si}}=X_O+D_{\mathrm{OSi}}^{\′}\cos ({\mathrm{\α}}_{O-A}+{\mathrm{\β}}_{\mathrm{AOSi}}^{\′})\\ Y_{\mathrm{Si}}=Y_O+D_{\mathrm{OSi}}^{\′}\sin ({\mathrm{\α}}_{O-A}+{\mathrm{\β}}_{\mathrm{AOSi}}^{\′})\end{array}\right.$

6. for the first time each monitoring point coordinate of getting of observation station is as initial coordinate, and coordinate and initial coordinate after the correction that each later on observation obtains compare, and just can judge monitoring point S _i(i=1,2 ..., distortion situation n).

This invention has the following advantages:

1. the deformation state of deformable body can be provided, can monitor deformation range and the absolute displacement amount of determining deformable body effectively;

2. dirigibility is big, can be applicable to different accuracy requirements, multi-form deformable body and different external condition;

3. adopt that the polar coordinates method of difference asks deformation point coordinate figure precision obtained large increase.

Four, description of drawings

The present invention is further described below in conjunction with drawings and Examples.

Fig. 1 angular distance difference location deformation monitoring synoptic diagram.

Five, embodiment

Three stable reference point O, A, B are set on according to field condition away from the ground of distorted area or stable buildings, requirement simultaneously can with monitoring point S ₁, S ₂... S _nIntervisibility.Three reference point coordinate A (X _A, Y _A), O (X _O, Y _O), B (X _B, Y _B) be known, by the distance L of these 3 OA that calculate ₀, OB distance L ' ₀, OA and OB horizontal sextant angle β ₀, total powerstation is placed on the O point, after the centering leveling, the A point is carried out backsight horizontal angle is changed to 0 ° 00 ' 00 ", determine after the direction, with total powerstation to point of fixity A, B, monitoring point S _i(i=1,2 ..., n) directly measure its distance D _OA, D _OB,

(i=1,2 ..., n) with OA and OB, OS _i(i=1,2 ..., the n) horizontal sextant angle between

With the distance D that records _OA, D _OBDistance L with known OA ₀, OB distance L ' ₀Carry out difference,

Δ D _OA=L ₀-D _OA, Δ D _OAPoor for known OA distance and measured value OA distance;

Δ D _OB=L ' ₀-D _OB, Δ D _OBPoor for known OB distance and measured value OB distance;

$\mathrm{\Δd}=\frac{1}{2}(\mathrm{\Δ}{D}_{\mathrm{OA}}/D_{\mathrm{OA}}+\mathrm{\Δ}{D}_{\mathrm{OB}}/D_{\mathrm{OB}}),$ Δ d is average per unit distance error rate;

Error rate is assigned to the measuring distance D of each monitoring point according to distance length _OSi(i=1,2 ..., n) among, calculate each monitoring point layback and count V _i=D _OSi* Δ d, the distance D of the monitoring point after obtaining at last correcting ' _OSi=D _OSi+ V _i(i=1,2 ..., n);

With the OA that records and the horizontal sextant angle β between the OB _AOBWith known level angle β ₀Carry out difference and obtain Δ β=β ₀-β _AOB, try to achieve angle per unit error rate Δ β '=Δ β/β _AOB, will be assigned to each with rate according to angular dimension and measure horizontal sextant angle

Among, calculate each monitoring point correction on angles number

Angle after the correction of the monitoring point that obtains ${\mathrm{\β}}_{{\mathrm{AOS}}_i}^{\′}={\mathrm{\β}}_{{\mathrm{AOS}}_i}+W_i,(i=\mathrm{1,2}\·\·\·\·\·\·,n);$

According to three known point A (X _A, Y _A), O (X _O, Y _O), B (X _B, Y _B), can obtain the azimuth angle alpha of OA _O-A, with the distance D of each monitoring point of obtaining above ' _OSiAnd angle

The following formula of substitution just obtains S _i(i=1,2 ..., coordinate (X n) _Si, Y _Si)

$\left\{\begin{array}{c}{X}_{\mathrm{Si}}=X_O+D_{\mathrm{OSi}}^{\′}\cos ({\mathrm{\α}}_{O-A}+{\mathrm{\β}}_{\mathrm{AOSi}}^{\′})\\ Y_{\mathrm{Si}}=Y_O+D_{\mathrm{OSi}}^{\′}\sin ({\mathrm{\α}}_{O-A}+{\mathrm{\β}}_{\mathrm{AOSi}}^{\′})\end{array}\right.$

With each monitoring point S that the first time, observation station got _iCoordinate is as initial coordinate, and coordinate and initial coordinate after the correction that each later on observation obtains compare, and just can judge monitoring point S _i(i=1,2 ..., distortion situation n) when deformation extent surpasses allowed band, can be made early warning in advance, and the precision level of this deformation monitoring method has obtained improving greatly, and work efficiency also obviously promotes.

Claims (1)

1. location technology for deformation monitoring based on total powerstation angular distance difference, it is characterized in that: be that instrument takes measurement of an angle and distance with the total powerstation, by the accurate location of angular distance difference realization to monitoring point in the deformation monitoring, judge the distortion situation of monitoring point, concrete steps are as follows:

1. according to field condition three stable reference point O, A, B being set is known point, and wherein the O point is the survey station point, respectively can with monitoring point S ₁, S ₂... S _nIntervisibility;

2. settling total powerstation on survey station point O, is orientation point with the A point, and aiming A point also is changed to 0 ° 00 ' 00 with horizontal angle ", measure survey station point O and reference point A, B, monitoring point S respectively with total powerstation _i(i=1,2 ..., n) the horizontal range D between _OA, D _OB,

(i=1,2 ..., n), measure OA and OB, OS _i(i=1,2 ..., the n) horizontal sextant angle between

3. according to known point A (X _A, Y _A), O (X _O, Y _O), B (X _B, Y _B) can calculate the distance L of OA ₀, OB distance L ' ₀, OA and OB horizontal sextant angle β ₀, with the distance D of the actual known point that records _OAAnd D _OBCarry out difference and obtain Δ D _OA=L ₀-D _OAWith Δ D _OB=L ' ₀-D _OB, according to formula $\mathrm{\Δd}=\frac{1}{2}(\mathrm{\Δ}{D}_{\mathrm{OA}}/D_{\mathrm{OA}}+\mathrm{\Δ}{D}_{\mathrm{OB}}/D_{\mathrm{OB}})$ Try to achieve the average per unit distance error rate Δ d of distance, error rate is assigned to the measuring distance D of each monitoring point according to distance length _OSi(i=1,2 ..., n) among, calculate each monitoring point layback and count V _i=D _OSi* Δ d, the distance D of the monitoring point after obtaining at last correcting ' _OSi=D _OSi+ V _i(i=1,2 ..., n);

4. with the OA that records and the horizontal sextant angle β between the OB _AOBWith known level angle β ₀Carry out difference and obtain Δ β=β ₀-β _AOB, try to achieve angle per unit error rate Δ β '=Δ β/β _AOB, according to angular dimension error rate is assigned to each and measures horizontal sextant angle

Among, calculate each monitoring point correction on angles number

Angle after the correction of the monitoring point that obtains ${\mathrm{\β}}_{{\mathrm{AOS}}_i}^{\′}={\mathrm{\β}}_{{\mathrm{AOS}}_i}+W_i,(i=\mathrm{1,2}\·\·\·\·\·\·,n);$

5. the distance D after will correcting ' _OSiAnd angle Azimuth angle alpha with OA _O-AThe substitution formula

Just obtain S _i(i=1,2 ..., coordinate n)

$\left\{\begin{array}{c}{X}_{\mathrm{Si}}=X_O+D_{\mathrm{OSi}}^{\′}\cos ({\mathrm{\α}}_{O-A}+{\mathrm{\β}}_{\mathrm{AOSi}}^{\′})\\ Y_{\mathrm{Si}}=Y_O+D_{\mathrm{OSi}}^{\′}\sin ({\mathrm{\α}}_{O-A}+{\mathrm{\β}}_{\mathrm{AOSi}}^{\′})\end{array}\right.$

6. for the first time each monitoring point coordinate of getting of observation station is as initial coordinate, and coordinate and initial coordinate after the correction that each later on observation obtains compare, and just can judge monitoring point S _i(i=1,2 ..., distortion situation n).

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