CN104677331B - Spatial distance measurement method at alternating fixed points of conductor in long span - Google Patents

Abstract

The invention discloses a spatial distance measurement method at alternating fixed points of a conductor in long span. The method comprises the following steps: setting a total station through known coordinate points, performing angle observation on a hanging point, and computing tower position suspension point coordinates according to a space intersection principle; computing target point plane coordinates by using the plane coordinates of the hanging point and the horizontal distance from the target point to the tower position; inversely computing an azimuth angle of a connecting line of the two known coordinate points and the target point according to the known coordinate points and the plane coordinate of the target point; and repeating the steps, computing parameters of another target point, and computing the conductor space distance according to the space coordinates of the two target points. Through the method, the precise spatial distance at alternating fixed points of the conductor can be obtained.

Description

Space distance measurement method at the alternate fixed point of wire at a kind of Great span

Technical field

The present invention relates to space distance measurement method at the alternate fixed point of wire at a kind of Great span.

Background technology

Transmission line of electricity disaster caused by a windstorm administer and polling transmission line work in, obtain the alternate fixed point of accurate wire at space away from From being an important basic work, conventional method is that total powerstation is set up at horizontal path position directly below operating personnel Obtain space length.But when transmission line of electricity crosses over river, the Special zone such as mountain valley, total powerstation at fixed point cannot frame station, Obtain that at alternate fixed point, space length is very difficult, conventional method is no longer applicable.

Content of the invention

The present invention is in order to solve the above problems it is proposed that space distance measurement side at the alternate fixed point of wire at a kind of Great span Method, this method devises big across cable space distance measurement technique scheme based on space intersection and Suspension surveying method： Utilization space forward intersection principle calculates tower position and hangs point coordinates, and the horizontal range inverse by impact point to tower position hitch point Go out the plane coordinates at impact point；Trigonometric levelling principle is recycled to calculate the elevation of impact point, thus it is three-dimensional to obtain it Coordinate, and calculate space three-dimensional distance at the alternate fixed point of corresponding wire further.

To achieve these goals, the present invention adopts the following technical scheme that：

Space distance measurement method at the alternate fixed point of wire at a kind of Great span, comprises the following steps：

(1) total powerstation is set in known coordinate point, hanging wire point is carried out with angle observation, utilization space forward intersection principle meter Calculate tower position and hang point coordinates；

(2) plane coordinates of hanging wire point and impact point to the horizontal range of tower position is utilized to calculate impact point plane coordinates；

(3) according to the plane coordinates inverse setting website and impact point, obtain the azimuth setting website and impact point line, so Rotate total powerstation afterwards so far on azimuth, and obtain the elevation of impact point using triangulated height principle；

(4) repeat the above steps, calculate the coordinate of another impact point, according to the space coordinates of two impact points, calculate Cable space distance.

In described step (1), if C point is the wire hitch point I of a tower position, D is the wire hitch point of another tower position II, total powerstation is set up in 2 points of A, B on ground, and A, B point coordinates is it is known that then carrying out angular observation to hanging wire point C, D, And obtain azimuth, obtain angle value ∠ CAB, ∠ ABC, ∠ using frame website A, B and hanging wire point azimuthal angle calculation between C, D DAB、∠ABD.

In described step (1), after obtaining angle value, utilization space forward intersection principle obtains hanging wire point C, D plane coordinates, Computing formula is as follows：

In above formula, X_A、Y_A、X_B、Y_BRepresentative sets website A, B point plane coordinates；X_C、Y_C、X_D、Y_DThe hitch point that representative need to calculate C, D point plane coordinates, α 1=∠ CAB, β 1=∠ ABC, α 2=∠ DAB, β 2=∠ ABD.

In described step (2), concrete grammar is：Calculate the azimuth γ of hanging wire point line CD, impact point E is apart from hanging wire point The horizontal range of C is L, then obtain E point plane coordinates according to below equation and be：

X_E=X_C+L cosγ；

Y_E=Y_C+L sinγ.

In described step (3), set up total powerstation in A point, according to known azimuth rotary apparatus to impact point E, A point height For H_A, E point is the impact point that need to measure, i be A point instrument height, from A point observe B point vertical angle be δ, D be point-to-point transmission level away from From then E point height H_E1Calculated by following formula：

H_E1=D*tg δ+i+H_A

Height value H being measured by the total powerstation that B point sets up can be obtained in the same manner_E2, average acquisition E point height H_E.

In described step (4), according to the space coordinates of impact point E, F, using formula Calculate cable space distance.

Beneficial effects of the present invention are：

This method is simple to operate, and amount of calculation is little, in transmission line of electricity disaster caused by a windstorm is administered and polling transmission line works, works as transmission of electricity Special zone such as line crossing river, mountain valley or sweep scanning operation radius area beyond laser ranging and ground laser radar and make When at industry, application this method can obtain space length at the alternate fixed point of accurate wire.

Brief description

Fig. 1 is the measurement process schematic diagram of the present invention；

Fig. 2 is the second step measurement process schematic diagram of the present invention；

Fig. 3 is the 3rd pacing amount process schematic of the present invention.

Specific embodiment：

The invention will be further described with embodiment below in conjunction with the accompanying drawings.

The first step：Utilization space forward intersection principle calculates tower position hitch point plane coordinates：

1. as shown in accompanying drawing 1,2, C point is wire hitch point 1, and D is wire hitch point 2, and total powerstation is set up in A, B two Point, A, B point coordinates is it is known that then carrying out angular observation to hanging wire point C, D, and obtains azimuth, using frame website and hanging wire Azimuth between point can obtain angle value ∠ CAB, ∠ ABC, ∠ DAB, ∠ ABD by simple computation, after obtaining angle value, Available space intersection principle obtains hanging wire point C, D plane coordinates, and computing formula is as follows：

In above formula, X_A、Y_A、X_B、Y_BRepresentative sets website A, B point plane coordinates；X_C、Y_C、X_D、Y_DThe hitch point that representative need to calculate C, D point plane coordinates, α 1=∠ CAB, β 1=∠ ABC, α 2=∠ DAB, β 2=∠ ABD

Second step：Calculate impact point plane using horizontal range L of hanging wire point C, D plane coordinates and impact point to tower position to sit Mark

1) calculate the azimuth angle alpha of hanging wire point line CD

2) impact point E is L apart from the horizontal range of hanging wire point, then can obtain E point plane coordinates according to below equation and be：

X_E=X_C+L×cosα

Y_E=Y_C+ L × sin α,

3) basis sets website A, B and impact point E plane coordinates inverse, the azimuth angle alpha of A point and E point line_AE, B point and E point The azimuth angle alpha of line_BE.

3rd step：Setting at website A, B respectively, rotation total powerstation is to azimuth angle alpha_AEAnd α_BE, and according to trigonometric levelling Principle calculates the elevation of impact point E, thus obtaining the three-dimensional coordinate of E point, specific formula for calculation is as follows：

Triangulated height computing formula：As shown in Figure 3, set up total powerstation in A point, according to known azimuth rotary apparatus extremely Impact point E, A point height is H_A, E point is the impact point that need to measure, and i is A point instrument height, and the vertical angle observing E point from A point is α, D is point-to-point transmission horizontal range, then E point height H_ECan be calculated by following formula：

H_E=D × tg α+i+H_A,

The E point height H that can obtain in the same manner by B point frame station and measure_E2, the final elevation that both average as E point.

4th step：The space coordinates of another place impact point F on wire can be obtained in the same manner, the space according to impact point E, F is sat Mark, using formulaCalculate cable space distance.

Although the above-mentioned accompanying drawing that combines is described to the specific embodiment of the present invention, not model is protected to the present invention The restriction enclosed, one of ordinary skill in the art should be understood that on the basis of technical scheme, and those skilled in the art are not Need to pay the various modifications that creative work can make or deformation still within protection scope of the present invention.

Claims (6)

1. space distance measurement method at the alternate fixed point of wire at a kind of Great span, is characterized in that：Comprise the following steps：

(1) total powerstation is arranged by known coordinate point, wire hitch point is carried out with angle observation, utilization space forward intersection principle Calculate tower position and hang point coordinates；

(2) plane coordinates of wire hitch point and impact point to the horizontal range of tower position is utilized to calculate impact point plane coordinates；

(3) according to the plane coordinates inverse setting website and impact point, the azimuth setting website and impact point line, Ran Houzhuan are obtained Dynamic total powerstation, so far on azimuth, obtains the elevation of impact point using triangulated height principle；

(4) repeat the above steps, calculate the coordinate of another impact point, according to the space coordinates of two impact points, calculate wire Space length.

2. space distance measurement method at the alternate fixed point of wire at a kind of Great span as claimed in claim 1, is characterized in that：Institute State in step (1), if C point is the wire hitch point I of a tower position, D is the wire hitch point II of another tower position, by total powerstation It is set up in 2 points of A, B on ground, A, B point coordinates is it is known that then carrying out angular observation to wire hitch point C, D, and obtains Azimuth, obtains angle value ∠ CAB, ∠ ABC, ∠ DAB, ∠ using the azimuthal angle calculation between frame website and wire hitch point ABD.

3. space distance measurement method at the alternate fixed point of wire at a kind of Great span as claimed in claim 2, is characterized in that：Institute State in step (1), after obtaining angle value, utilization space forward intersection principle obtains wire hitch point C, D plane coordinates, calculate public Formula is as follows：

$X_C=\frac{X_{A}tan\mathrm{\α}1+X_{B}tan\mathrm{\β}1+(Y_B-Y_A)tan\mathrm{\α}1tan\mathrm{\β}1}{tan\mathrm{\α}1+tan\mathrm{\β}1}$

$Y_C=\frac{Y_{A}tan\mathrm{\α}1+Y_{B}tan\mathrm{\β}1+(X_B-X_A)tan\mathrm{\α}1tan\mathrm{\β}1}{tan\mathrm{\α}1+\tan \mathrm{\β}1}$

$X_D=\frac{X_{A}tan\mathrm{\α}2+X_{B}tan\mathrm{\β}2+(Y_B-Y_A)tan\mathrm{\α}2tan\mathrm{\β}2}{tan\mathrm{\α}2+tan\mathrm{\β}2}$

$Y_D=\frac{Y_{A}tan\mathrm{\α}2+Y_{B}tan\mathrm{\β}2+(X_B-X_A)tan\mathrm{\α}2tan\mathrm{\β}2}{tan\mathrm{\α}2+tan\mathrm{\β}2}$

In above formula, X_A、Y_A、X_B、Y_BRepresentative sets website A, B point plane coordinates；X_C、Y_C、X_D、Y_DHitch point C, D point that representative need to calculate Plane coordinates, α 1=∠ CAB, β 1=∠ ABC, α 2=∠ DAB, β 2=∠ ABD.

4. space distance measurement method at the alternate fixed point of wire at a kind of Great span as claimed in claim 3, is characterized in that：Institute State in step (2), concrete grammar is：Calculate the azimuth γ, impact point E distance of wire hitch point C of wire hitch point line CD Horizontal range be L, then according to below equation obtain E point plane coordinates be：

X_E=X_C+L cosγ；

Y_E=Y_C+L sinγ.

5. space distance measurement method at the alternate fixed point of wire at a kind of Great span as claimed in claim 1, is characterized in that：Institute State in step (3), set up total powerstation in A point, according to known azimuth rotary apparatus to impact point E, A point height is H_A, E point is The impact point that need to measure, i is A point instrument height, and the vertical angle observing E point from A point is δ, and D is point-to-point transmission horizontal range, then E point is high Journey H_E1Calculated by following formula：

H_E1=D*tg δ+i+H_A

Height value H of the total station survey E point being set up by B point can be obtained in the same manner_E2, average acquisition E point height H_E.

6. space distance measurement method at the alternate fixed point of wire at a kind of Great span as claimed in claim 1, is characterized in that：Institute State in step (4), according to the space coordinates of impact point E, F, using formula

Calculate cable space distance.