CN103499298B - A kind of laser collimation in vacuum line displacement measuring device end points absolute displacement correcting method - Google Patents
A kind of laser collimation in vacuum line displacement measuring device end points absolute displacement correcting method Download PDFInfo
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- CN103499298B CN103499298B CN201310490010.3A CN201310490010A CN103499298B CN 103499298 B CN103499298 B CN 103499298B CN 201310490010 A CN201310490010 A CN 201310490010A CN 103499298 B CN103499298 B CN 103499298B
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Abstract
The present invention relates to a kind of laser collimation in vacuum line displacement measuring device end points absolute displacement correcting method, belong to building displacement monitoring method and improve.Any one in both transmitting end equipment or receiving device is installed on settling position, one measuring box for another end points displacement correction is being installed in the range of this end 5～20m, by measuring the displacement variable of this measuring box position, computational methods are corrected by end points, calculating the relative displacement variable quantity of receiving terminal and transmitting terminal, this relative displacement variable quantity adds that the absolute displacement of this end points is the absolute displacement variable quantity of another end points.Advantage is, owing to merely add a measuring point, its measurement time there is no big change compared with other scheme, and the requirement that the system that not only meets is arranged also can cost saving greatly.
Description
Technical field
The invention belongs to building displacement monitoring method improve.
Background technology
Laser collimation in vacuum line displacement measuring device has been widely used in the displacement monitoring of linear type building, can measure horizontal X to (being perpendicular to building axis direction) and vertical Z to the change in displacement of both direction.This system is mainly made up of laser beam emitting device, laser receiver, measuring box, vacuum pipe, evacuation control system and data collecting system.System principle and composition refer to " laser collimation in vacuum line displacement measuring device " (DL/T328-2010).
What laser collimation in vacuum line displacement measuring device was measured is the point position relative displacement variable quantity relative to transmitting terminal (laser beam emitting device position) Yu receiving terminal (laser receiver position), relative displacement variable quantity cannot meet detection requirement, needs the correction continuing absolutely displacement variable to calculate.The arrangement of conventional system design is typically employed in transmitting terminal and receiving terminal arranges end points absolute displacement and measures equipment, reversed pendulum (horizontal X is to the measurement of absolute displacement variable quantity) and double-metal mark (vertical Z is to the measurement of absolute displacement variable quantity) combination unit is typically used to measure two end points change in displacement relative to deep stability rock mass at present, and the absolute displacement variable quantity of two end points is substituted in the absolute displacement computing formula of point position, finally calculate the absolute displacement variable quantity of point position.Circular refers to " concrete dam safety monitoring materials compilation code " (DL/T5209-2005)
At present, domestic laser collimation in vacuum line displacement measuring device is mainly used in large water conservancy hydroelectric engineering, and installation site is generally dam crest or the dam foundation.If conditions permit design can also take another arrangement: at the two ends of system along system axis to two sides massif excavation observation hole, transmitting end device and receiving end device is arranged in hole.When hole body depth is enough (can be determined by FEM calculation), it is believed that be arranged in hole two end points are stable, the most then need not arrange end points absolute displacement again and measure equipment, the relative displacement variable quantity that measuring point calculates is the absolute displacement variable quantity of measuring point.
Following problem is there is in above two arrangement for some domestic engineerings:
1) river valley of engineering dam site is U-shaped river valley, if beat inverted vertical hole its to enter rock depth requirements higher, cause difficulty of construction and construction costs to sharply increase the most therewith；
2) engineering space is narrow, and transmitting terminal or receiving terminal do not possess the space installing end points absolute displacement measurement equipment；
3) two sides massif is more broken, and it is relatively big that difficulty is implemented in observation hole, relatively costly.
These problems seriously constrain the popularization and application of laser collimation in vacuum line displacement measuring device, and the most domestic also do not have preferable solution.
Summary of the invention
The present invention provides a kind of laser collimation in vacuum line displacement measuring device end points absolute displacement correcting method, the problem big with the difficulty implemented to solve present laser collimation in vacuum line displacement measurement system layout.
The present invention adopts the technical scheme that, comprises the following steps:
(1), any one in both transmitting end equipment or receiving device is installed on settling position, such as this position instability, end points absolute displacement need to be installed and measure equipment；
(2), installing a measuring box for another end points displacement correction in the range of this end points 5～20m, this measuring box and the requirement of this endpoint device are arranged on same platform or ensure that this measuring box position synchronizes deformation in company with this end points；
(3) displacement variable and end points by measuring this measuring box position correct computational methods, calculating the relative displacement variable quantity of receiving terminal and transmitting terminal, this relative displacement variable quantity adds that the absolute displacement of this end points is the absolute displacement variable quantity of another end points；It is as follows that described end points corrects computational methods, as a example by launching side layout end points correction measuring box:
Fx0、Fz0It is respectively transmitting terminal position displacement X to, the initial measured value of Z-direction, Fxn、FznBeing respectively the n-th observation of transmitting terminal position displacement, transmitting terminal position displacement measured value is obtained by end points displacement measuring equipment, then transmitting terminal X is respectively F to the absolute displacement variable quantity of, Z-direction n-th observationxn-Fx0、Fzn-Fz0, the F when transmitting terminal position is in steady statuexn=Fx0、Fzn=Fz0, transmitting terminal position X is 0 to, the absolute displacement variable quantity of Z-direction；Ax0、Az0Correct the measuring box measured value relative to receiving terminal observation coordinate system for end points, recorded by sharp laser collimation in vacuum line displacement measuring device, be receiving terminal X to, the initial value of Z-direction, Axn、AznIt is respectively end points and corrects the measuring box n-th observation relative to receiving terminal observation coordinate system；The direction of displacement variable is: horizontal X is to dam body downstream displacement for just, and upstream displacement is negative；Vertical Z is just being settled into downwards to dam body, and upwards lifting is negative, then the receiving terminal absolute displacement variable quantity computing formula that n-th observes is:
RXn=(Ax0-Axn)+(Fxn-Fx0) (1)
RZn=(Azn-Az0)+(Fzn-Fz0) (2)
In formula:
FX0Transmitting terminal position displacement X to initial measured value；
FZ0The initial measured value of transmitting terminal position displacement Z-direction；
FxnN-th X of transmitting terminal position displacement is to observation；
FznThe n-th Z-direction observation of transmitting terminal position displacement；
Ax0End points correct measuring box relative to receiving terminal observation coordinate system X to initial measured value；
Az0End points corrects the measuring box initial measured value relative to the Z-direction of receiving terminal observation coordinate system；
AxnEnd points corrects measuring box n-th X relative to receiving terminal observation coordinate system to observation；
AznEnd points corrects the measuring box n-th Z-direction observation relative to receiving terminal observation coordinate system；
RXnThe absolute displacement variable quantity that receiving terminal horizontal X is observed to n-th；
RZnThe absolute displacement variable quantity that receiving terminal vertical Z is observed to n-th.
The inventive method implement premise be any one end points in two end points of requirement be in steady statue maybe can arrange end points absolute displacement measure equipment, new technique can go out the absolute displacement variable quantity of another end points by the absolute displacement change calculations of this end points, thus decreases the difficulty that system is arranged and implemented.Simultaneously because decreasing an end points absolute displacement measurement equipment, can save construction investment greatly, a set of end points absolute displacement is measured the average construction investment of equipment and is about 40 ~ 500,000 yuan.
The method have the advantages that, owing to merely add a measuring point, its measurement time there is no big change compared with other scheme, and the requirement that the system that not only meets is arranged also can cost saving greatly.By long-term experiment, find that arranging end points correction measuring box before transmitting terminal or receiving terminal all can well complete acquisition and the calculating of absolute displacement variable quantity of relative displacement variable quantity between receiving terminal and transmitting terminal.
Accompanying drawing explanation
Fig. 1 is collimation schematic diagram before displacement of the present invention；
Fig. 2 is collimation schematic diagram after displacement of the present invention；
The change in displacement of transmitting terminal is to be recorded by end points displacement measuring equipment, is the displacement variable relative to deep stability rock mass, and therefore the variable quantity of its measured value is exactly absolute displacement change, and its coordinate system is also referred to as absolute coordinate system；The measured value that receiving terminal obtains is assisted endpoint calibrating installation relative to the measured value of receiving terminal observation coordinate system, and the variable quantity of its measured value is the receiving terminal displacement variable relative to transmitting terminal.
Detailed description of the invention
Comprise the following steps:
(1), any one in both transmitting end equipment or receiving device is installed on settling position, such as this position instability, end points absolute displacement need to be installed and measure equipment；
(2), installing a measuring box for another end points displacement correction in the range of this end points 5～20m, this measuring box and the requirement of this endpoint device are arranged on same platform or ensure that calibrating installation position synchronizes deformation in company with this end points；
(3) by measuring the displacement variable of this measuring box position, computational methods are corrected by end points, calculating the relative displacement variable quantity of receiving terminal and transmitting terminal, this relative displacement variable quantity adds that the absolute displacement of this end points is the absolute displacement variable quantity of another end points；It is as follows that described end points corrects computational methods, as a example by launching side layout end points correction measuring box:
See accompanying drawing 1, accompanying drawing 2, Fx0、Fz0It is respectively transmitting terminal position displacement X to, the initial measured value of Z-direction, Fxn、FznIt is respectively the n-th observation of transmitting terminal position displacement, transmitting terminal position displacement measured value is obtained by end points displacement measuring equipment, then transmitting terminal X is respectively F to the absolute displacement variable quantity (relative to the displacement variable of deep stability rock mass) of, Z-direction n-th observationxn-Fx0、Fzn-Fz0, the F when transmitting terminal position is in steady statuexn=Fx0、Fzn=Fz0, transmitting terminal position X is 0 to, the absolute displacement variable quantity of Z-direction；Ax0、Az0Correct the measuring box measured value relative to receiving terminal observation coordinate system for end points, recorded by sharp laser collimation in vacuum line displacement measuring device, be receiving terminal X to, the initial value of Z-direction, Axn、AznIt is respectively end points and corrects the measuring box n-th observation relative to receiving terminal observation coordinate system；The direction of displacement variable is: horizontal X is to dam body downstream displacement for just, and upstream displacement is negative；Vertical Z is just being settled into downwards to dam body, and upwards lifting is negative, then the receiving terminal absolute displacement variable quantity computing formula that n-th observes is:
RXn=(Ax0-Axn)+(Fxn-Fx0) (1)
RZn=(Azn-Az0)+(Fzn-Fz0) (2)
In formula:
FX0Transmitting terminal position displacement X to initial measured value；
FZ0The initial measured value of transmitting terminal position displacement Z-direction；
FxnN-th X of transmitting terminal position displacement is to observation；
FznThe n-th Z-direction observation of transmitting terminal position displacement；
Ax0End points correct measuring box relative to receiving terminal observation coordinate system X to initial measured value；
Az0End points corrects the measuring box initial measured value relative to the Z-direction of receiving terminal observation coordinate system；
AxnEnd points corrects measuring box n-th X relative to receiving terminal observation coordinate system to observation；
AznEnd points corrects the measuring box n-th Z-direction observation relative to receiving terminal observation coordinate system；
RXnThe absolute displacement variable quantity that receiving terminal horizontal X is observed to n-th；
RZnThe absolute displacement variable quantity that receiving terminal vertical Z is observed to n-th.
The change in displacement of transmitting terminal position is to be recorded by end points displacement measuring equipment, is the displacement variable relative to deep stability rock mass, and therefore the variable quantity of its measured value is exactly absolute displacement change, and its coordinate system is also referred to as absolute coordinate system.The measured value that receiving terminal obtains is that end points corrects the measuring box measured value relative to receiving terminal observation coordinate system, and the variable quantity of its measured value is the receiving terminal displacement variable relative to transmitting terminal.
Claims (1)
1. a laser collimation in vacuum line displacement measuring device end points absolute displacement correcting method, it is characterised in that comprise the following steps:
(1), any one in both transmitting end equipment or receiving device is installed on settling position, such as this position instability, end points absolute displacement need to be installed and measure equipment；
(2), installing a measuring box for another end points displacement correction in the range of this end points 5～20m, this measuring box and endpoint device requirement are arranged on same platform or ensure that calibrating installation position synchronizes deformation in company with this end points；
(3) by measuring the displacement variable of this measuring box position, computational methods are corrected by end points, calculating the relative displacement variable quantity of receiving terminal and transmitting terminal, this relative displacement variable quantity adds that the absolute displacement of this end points is the absolute displacement variable quantity of another end points；It is as follows that described end points corrects computational methods, as a example by launching side layout end points correction measuring box:
Fx0、Fz0It is respectively transmitting terminal position displacement X to, the initial measured value of Z-direction, Fxn、FznBeing respectively the n-th observation of transmitting terminal position displacement, transmitting terminal position displacement measured value is obtained by end points displacement measuring equipment, then transmitting terminal X is respectively F to the absolute displacement variable quantity of, Z-direction n-th observationxn-Fx0、Fzn-Fz0, the F when transmitting terminal position is in steady statuexn=Fx0、Fzn=Fz0, transmitting terminal position X is 0 to, the absolute displacement variable quantity of Z-direction；Ax0、Az0Correct the measuring box initial measured value relative to receiving terminal observation coordinate system for end points, recorded by laser collimation in vacuum line displacement measuring device, be receiving terminal X to, the initial value of Z-direction, Axn、AznIt is respectively end points and corrects the measuring box n-th observation relative to receiving terminal observation coordinate system；The direction of displacement variable is: horizontal X is to dam body downstream displacement for just, and upstream displacement is negative；Vertical Z is just being settled into downwards to dam body, and upwards lifting is negative, then the receiving terminal absolute displacement variable quantity computing formula that n-th observes is:
RXn=(Ax0-Axn)+(Fxn-Fx0)(1)
RZn=(Azn-Az0)+(Fzn-Fz0)(2)
In formula:
FX0Transmitting terminal position displacement X to initial measured value；
FZ0The initial measured value of transmitting terminal position displacement Z-direction；
FxnN-th X of transmitting terminal position displacement is to observation；
FznThe n-th Z-direction observation of transmitting terminal position displacement；
Ax0End points correct measuring box relative to receiving terminal observation coordinate system X to initial measured value；
Az0End points corrects the measuring box initial measured value relative to the Z-direction of receiving terminal observation coordinate system；
AxnEnd points corrects measuring box n-th X relative to receiving terminal observation coordinate system to observation；
AznEnd points corrects the measuring box n-th Z-direction observation relative to receiving terminal observation coordinate system；
RXnThe absolute displacement variable quantity that receiving terminal horizontal X is observed to n-th；
RZnThe absolute displacement variable quantity that receiving terminal vertical Z is observed to n-th.
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| CN1546942A (en) * | 2003-11-28 | 2004-11-17 | 大连理工大学 | Vacuum laser dam deformation measuring method |
| CN1687702A (en) * | 2005-05-27 | 2005-10-26 | 哈尔滨工业大学 | 2D photoelectric auto collimation equipment and measuring method based on dynamic differential compensation process |
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| JPS6468611A (en) * | 1987-09-09 | 1989-03-14 | Nikon Corp | Displacement measuring instrument |
| JP4104427B2 (en) * | 2002-10-31 | 2008-06-18 | 日本電産サンキョー株式会社 | Optical property measuring device |
| JP5541713B2 (en) * | 2009-08-21 | 2014-07-09 | キヤノン株式会社 | Laser interferometer, processing apparatus using the same, and method of manufacturing parts |
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|---|---|---|---|---|
| CN1546942A (en) * | 2003-11-28 | 2004-11-17 | 大连理工大学 | Vacuum laser dam deformation measuring method |
| CN1687702A (en) * | 2005-05-27 | 2005-10-26 | 哈尔滨工业大学 | 2D photoelectric auto collimation equipment and measuring method based on dynamic differential compensation process |
Non-Patent Citations (1)
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| 真空激光准直测坝变形系统在哈达山水利枢纽工程中的应用;徐岩彬等;《东北水利水电》;20110831(第8期);57-59 * |
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