CN101063610B - Automatic monitoring system for engineering project deformation - Google Patents
Automatic monitoring system for engineering project deformation Download PDFInfo
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- CN101063610B CN101063610B CN2007100747170A CN200710074717A CN101063610B CN 101063610 B CN101063610 B CN 101063610B CN 2007100747170 A CN2007100747170 A CN 2007100747170A CN 200710074717 A CN200710074717 A CN 200710074717A CN 101063610 B CN101063610 B CN 101063610B
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Abstract
This invention relates to one engineer automatic monitor system for one monitor system based on laser calibration, which comprises light emission system, light receive position system, test calibration position system, self-searching laser distance and position MCU control and CPU control, energy system and environment sustaining system, wherein the engineer part both ends are fixed with emission system and receive position system to establish one level calibration laser axis to determine laser axis space line equation by use of engineer circle deformation and laser test and positioning system; the calibration position system is distributed on monitor points to be tested along laser axis for cross and level displacement; when rain fall on sensor, CPU sends signal to each sub system to close its sub system cover.
Description
Technical field
The present invention relates to the automatic monitoring system used on a kind of engineering, be specially adapted to a kind of full-automatic deformation monitoring system that is used for the heavy construction body based on laser alignment.
Background technology
The safety evaluation of engineering bodies such as present dam, reservoir, bridge mainly depends on the deformation monitoring data, as horizontal shift, perpendicular displacement, amount of deflection, inclination, face joint and crack etc.; The monitoring method of horizontal shift mainly contains: movable target method, minor angle method, positive reversed pendulum, draw bracing cable, vacuum laser collimation method, forward intersection and traverse method etc.The monitoring method of perpendicular displacement mainly contains: accurate level, static level, triangulated height, communicating pipe vacuum laser collimation method etc.These methods all adopt the optical instrument manual measurement at first, along with the development of automatic technology, up to the present, realized vertical line, draw bracing cable, the robotization of static level, vacuum laser collimation, and GPS, total powerstation and fiber-optic monitoring system have occurred.
The vacuum laser colimated light system needs cooling device, also to keep certain vacuum tightness, the construction and installation difficulty, and vacuum tightness be cannot say for sure to demonstrate,prove for a long time in the reseting precision of zone plate, sensitivity and the pipe, and unsuccessful measurement that promptly can have influence on other measuring point of zone plate upset, chilled water, that difficulty is coordinated in vacuum pump work for a long time is big, if system leaks air, zone plate resets Problem of Failure, the maintenance engineering amount is bigger.GPS automated system investment cost is higher, unite total funds above 6,000,000 yuan every the river series of rocks, remove software, because each distortion measuring point need be equipped with antenna and GPS receiver, the single-point expense is also more than 200,000 yuan, it is bigger that its measuring accuracy is influenced by position and Measuring Time, as just observing in the gallery, obtain the accurate measured value of measuring point, Measuring Time is longer, prior because of gps satellite is that U.S. government is used for military purposes and launches, on strategic importance, the reservoir of a country, dam, bridge monitoring can not rely on this method.
Technical matters to be solved by this invention is, a kind of deformation monitoring system of unmanned fully-automatic large-scale engineering body is provided, this system can be used for the heavy construction body that straight line distributes, as dam, reservoir bridge flood control embankment etc., the sensitive spot of linear distribution on the engineering body carried out wireless searching continuous or intermittence, except that data such as the horizontal shift of gathering each point, perpendicular displacement, amount of deflection, inclination, temperature, humidity, also can go up the Three-Dimensional Dynamic curve of the axis that shows the engineering body in giant-screen LCD.
Summary of the invention
The objective of the invention is to realize by following technical solution: for solving the problems of the technologies described above, the present invention is by light emission system, the light-receiving positioning system, measuring point collimation positioning system, from target-seeking laser ranging and positioning system MCU control and CPU control, energy resource system, environment is kept system and is formed, settle light emission system and light-receiving positioning system respectively at the two ends of engineering body, set up the collimation laser axle of a level by these two systems, utilize the deformation control net of engineering body periphery, from the locus of target-seeking laser ranging and positioning system tracking laser axis, determine the space line equation of laser axis; A plurality of measuring point collimation positioning systems are distributed on the point to be monitored of engineering body along laser axis, and the level that detects point to be monitored and laser axis quadrature to and vertical to the displacement with respect to laser axis, when any the signal output of the sensor that rains, air velocity transducer, sand and dust sensor reaches certain limit value, CPU will send signal to each subsystem, close its subsystem guard shield.
Each measuring point collimation positioning system of the present invention all has independently the Detection ﹠ Controling system based on MCU, it exchanges as data with CPU in the light emission system by wireless data sending, and MCU and photoelectric device control are rotated in the horizontal direction from the guard shield of target-seeking laser ranging.Measuring point with respect to the quadrature level of collimation laser axle and vertically to the position move.
The energy of described measuring point collimation positioning system is charged by high power laser by charging in the light emission system and ranging laser and provides.The servo platform of described measuring point collimation positioning system is positioned on the survey pier of point to be monitored, and the space of point to be monitored tilts and can be detected by the high precision double-axis tilt sensor on the servo platform, and adjusts servo platform by servo motor.
Light emission system of the present invention comprises high-performance collimation laser device, high-power charging and ranging laser, servo platform, stabilized voltage supply, horizontal location sensor, MCU control circuit, cpu data treatment circuit, described high-performance collimation laser device is fixed on the servo platform, and servo platform adopts three screw rods to support motor servo-type or double freedom gravity inertial servo-type or dual rotary face motor servo-type.Described three screw rods support the motor servo platform and comprise that base, studdle, band reducer casing servo motor, displacement transducer, double-axis tilt sensor, magnetic declination sensor, micro-stepping advance motor, described base is supported by three studdles perpendicular to base and equal angles distribution, the rotation may command base pitching of studdle, servo respectively wherein two studdles of the servo motor of two band reducer casinges are to control base along the both direction pitching.Described double-axis tilt sensor is fixed on the base, and its output signal will be controlled the servo motor action and be in horizontality all the time to keep base, and the tilt correction quantity of base is detected by two displacement transducers.Described double-axis tilt sensor adopts absolute rotary encoder, and it is fixed on the reducer casing with described servo motor, detects the absolute rotation amount of studdle.The space level that described magnetic declination sensor can detect base to reverse, when this reverses when exceeding limit value, described MCU control circuit will be controlled described micro-stepping and advance the motor action to revise the direction of laser optical axis.
Light emission system of the present invention, light-receiving positioning system, the same with measuring point collimation positioning system from target-seeking laser ranging positioning system, all there is servo platform that horizontal servo is provided, also be provided with the magnetic biasing sensor on each servo platform, by means of the magnetic declination sensor, not only there has been directional reference in all systems in installation and operation, and the level that can detect engineering body two ends and all points to be monitored to reverse.Described stadimeter from target-seeking laser ranging has protective cover automatically to the catoptron on the difficult deformation reference mark on the catoptron, the folding window is by MCU and photosensitive device control on the protective cover.
Multiple advantages such as the present invention compared with prior art has the automaticity height, versatility is good, precision is high, reliable operation, structure tube list.
Description of drawings
Fig. 1 is a full-automatic deformation monitoring system architecture synoptic diagram of the present invention.
Fig. 2 a, 2b are light emission system structural representations of the present invention.
Fig. 3 is a servo platform structural representation of the present invention.
Fig. 4 a, Fig. 4 b are measuring point collimation laser device structural representations of the present invention.
Fig. 5 a, Fig. 5 b, Fig. 5 c are light-receiving positioning system structural drawing of the present invention.
Fig. 6 is a protective cover structural representation of the present invention.
Specific embodiment
The present invention is described in further detail below in conjunction with description of drawings: as shown in Figure 1, the invention provides a kind of full-automatic deformation monitoring system that is used for the heavy construction body based on laser alignment, this system is by light emission system, the light-receiving positioning system, measuring point collimation positioning system, from target-seeking laser ranging and positioning system MCU control and CPU control, energy resource system, environment is kept system and is formed, settle light emission system and light-receiving positioning system respectively at the two ends of engineering body, set up the collimation laser axle of a level by these two systems, utilize the deformation control net (this control net normally by more higher leveled control network control system) of heavy construction body periphery, from the locus that target-seeking laser ranging and positioning system can be followed the tracks of laser axis, that is can determine arbitrary space line equation that detects laser axis constantly; A plurality of measuring point collimation positioning systems are distributed on the point to be monitored of engineering body along laser axis, and the level that goes out point to be monitored and laser axis quadrature with submillimeter level precision fast detecting to and vertical to the displacement with respect to laser axis, each measuring point collimation positioning system all has independently the Detection ﹠ Controling system based on MCU (single-chip microcomputer), it exchanges as data with CPU in the light emission system by wireless data sending, in the more abominable area of environment, the energy of measuring point collimation positioning system can be charged by high power laser by charging in the light emission system and ranging laser and provide, the servo platform of measuring point collimation positioning system is positioned on the survey pier of point to be monitored, the space of point to be monitored tilts can be detected by the high precision double-axis tilt sensor on the servo platform, drive servo control mechanism control platform via MCU and keep level, MCU can detect space of points inclined trajectory to be monitored by the absolute type displacement transducer that links on the servo control mechanism simultaneously, light emission system light-receiving positioning system is the same with measuring point collimation positioning system with positioning system from target-seeking laser ranging, all there is servo platform that horizontal servo is provided, also be provided with the magnetic declination sensor on each servo platform, by means of the magnetic declination sensor, not only there has been directional reference in all systems in installation and operation, and the level that can detect engineering body two ends and all points to be monitored to reverse.
All these subsystems constitute an open-air base station, the control center of base station reaches relevant software, control circuit, wireless transceiver circuit, power circuit etc. based on a high performance CPU, it is integrated in the light emission system, when under unattended state, working, the energy of base station is provided by typhoon energy generator and an autotracking solar panel, certainly, if conditions permit also can be used cable power.Multiple mode can be adopted with communicating by letter of mster-control centre, interior ground in open-air base station, as: by existing GSM network service, utilize the GPRS short message communication, lease specific satellite tunneling traffic, single-sideband communication etc., CPU and the present ripe wireless data transmission module of the employing of communicating by letter between each subsystem in the base station, by the action of each subsystem of the unified control of CPU, each subsystem all has firm guard shield protection, and is controlled by MCU separately; When any the signal output of the sensor that rains that is connected in CPU, air velocity transducer, sand and dust sensor reaches certain limit value, CPU will send its guard shield of signal at stop to each subsystem; Each subsystem all has two rechargeable battery pack, and the MCU may command of each subsystem is switched, and when one group of brownout using, MCU can automatically switch to another group, and sends the charging request signal to the CPU of base station control center, and CPU will be at one's leisure to its charging;
Collection to data such as each to be monitored deformation and temperature humidity on the engineering body, be by the software control of CPU, continuous searching, intermittently searching, regularly searching are arranged, long-range mster-control centre its acquisition mode of may command, from target-seeking laser ranging and positioning system starting can also can control by CPU according to determining its resting period the analysis of its data of surveying by long-range mster-control centre; CPU will send immediately to long-range mster-control centre except that the data backup with all collections, and the transmission of each data all has verification with reception, and is error-free to guarantee that data do not have leakage.Shown in accompanying drawing 2a, Fig. 2 b, the openr and traffic that light emission system is placed in the engineering body is an end relatively more easily.Described light emission system comprises high-performance collimation laser device 1, high-power charging and ranging laser 2, servo platform, stabilized voltage supply, horizontal location sensor 3MCU control circuit, cpu data treatment circuit, described high-performance collimation laser device 1 is fixed on the servo platform, and servo platform has multiple structure: three screw rods support motor servo-type, double freedom gravity inertial servo-type, dual rotary face motor servo-type.Present embodiment adopts structure simple and be convenient to install, three screw rods as shown in Figure 3 support the motor servo-type, this servo platform comprises base 5, studdle 4, band reducer casing servo motor 6, displacement transducer 7, double-axis tilt sensor 8, the flat angle transducer 9 of magnetic, motor 10 is advanced in micro-stepping, described base 5 is supported by three studdles 4 perpendicular to base and equal angles distribution, rotation may command base 5 pitching of studdle 4, servo respectively wherein two studdles 4 of the servo motor 6 of two band reducer casinges are to control base 5 along the both direction pitching, described double-axis tilt sensor 8 is fixed on the base 5, its output signal will be controlled servo motor 6 actions and be in horizontality all the time to keep base 5, the tilt correction quantity of base 5 detects 7 by two displacement transducers, what present embodiment used is absolute rotary encoder, it is fixed on the reducer casing with described servo motor 6, can detect the absolute rotation amount of studdle 4, the space level that described magnetic declination sensor 9 can detect base 5 to reverse, when this reverses when exceeding limit value, described MCU control circuit will be controlled described micro-stepping and advance motor 10 actions to revise the direction of laser optical axis, and this revises must be with reference to the feedback information of described light-receiving positioning system.
Described high-performance collimation laser device will provide the laser of a branch of power stability, and its hot spot is rounded, and light distribution is even, or light distribution is certain, and light beam is not shaken; Described high-power charging and ranging laser are except that providing the energy for described measuring point collimation positioning system, CPU also can by when charging reflected back laser measure corresponding accurate distance along optical axis direction to be monitored, thereby can go out the origin coordinates and the instantaneous coordinate of this point to be monitored by the space line equation reduction of optical axis.
Shown in accompanying drawing 4a, Fig. 4 b, this system is placed on the point to be monitored (the deformation sensitive spot of engineering body) of engineering body, and the servo base in the structure of its servo base and principle of work and the aforesaid light emission system is basic identical, repeats no more herein; Precise guide rail 11 horizontal fixed shown in the figure are on servo base 5, one end of precise guide rail 11 and accurate slide block 12 quadratures and a rigid connection along precise guide rail 11 translations, accurate slide block 12 connects by precision lead screw secondary 13 and precise guide rail 11, the motion of accurate slide block 12 in precise guide rail 11 driven precision lead screws 13 rotations and realizes through reducer casing 14 by servo motor 6, the mobile vector of accurate slide block 12 relative precise guide rail 11 can be detected by displacement transducer 7, and what present embodiment adopted is to be detected by the absolute rotary encoder 15 with reducer casing 14 interlocks; During installation system, make the leading screw 13 of precise guide rail 11 and the light shaft positive cross of collimation laser device 1, this operation can be finished by magnetic biasing sensor 9;
Fixed an optical axis alignment sensor 16 on the accurate slide block 12, this sensor is formed a circular ring structure by the photovoltaic device of four precision rulings, the photovoltaic device of four precision rulings is distributed in four quadrants of annulus symmetrically, circular diameter is slightly less than the diameter of the optical axis of described collimation laser device 1 in it, the symmetry up and down two connect a differential amplifier, its output drives the servo motor on the precise guide rail 11, two connect another differential amplifier about symmetry, its output drives the servo motor 6 on the precise guide rail 11, the axis of circle and the optical axis coincidence of collimation laser device 1 in making during installation, like this when the point to be monitored on the engineering body is subjected to displacement, the optical axis of the axis runout collimation laser device of circle in will causing, described two differential amplifiers all will have output this moment, thereby drive servo motor 6 actions separately, the optical axis coincidence of the axis of circle and described collimation laser device 1 is that described two differential amplifiers are all less than output in described photovoltaic device; Making the interior circular diameter of the photovoltaic device of all described measuring points collimation positioning systems of arranging along the optical axis extending direction of described collimation laser device 1 be equal difference in the design arranges, that is the interior circular diameter of a back photovoltaic device is than a previous little constant, present embodiment is designed to 0.2mm, such design just can guarantee when the light beam of described collimation laser device 1 passes any one photovoltaic device, the spot diameter that falls thereon all can be greater than the interior circular diameter of this photovoltaic device, the part that the light beam of described in addition collimation laser device 1 is evenly dispersed in communication process makes described photovoltaic device generation signal export to coupled differential amplifier to drive servo motor 6 actions with having enough light intensity.
Described photovoltaic device is designed to curved surface towards the one side of described collimation laser device 1, edge of circle is blade-like in it, so neither have the work of disturbing described collimation laser device along the light of the light beam of described collimation laser device reflection, simultaneously, after the light beam of described collimation laser device passes described photovoltaic device, the edge that is projeced into the hot spot on next photovoltaic device surface still can keep slick and sly, thereby guarantees that described photovoltaic device promptly has sensitive response to the micro-displacement that the point to be monitored on the engineering body takes place.Described measuring point colimated light system is sealed in the firm nonmagnetic protective cover, but the madial wall of protective cover is connected with the folding and unfolding photovoltaic device, can be by an inner motor driven folding and unfolding, when described light emission system sends instruction when described measuring point colimated light system is charged, the MCU of described measuring point colimated light system will control it and emit, charging finishes to be regained by the folding and unfolding window immediately, with flexible material itself and built-in system is isolated; In addition, the optical axis alignment sensor of described measuring point colimated light system also uses flexible material and built-in system to isolate, and internal system adopts heat-barrier material and by semiconductor cooling device temperature adjustment and dehumidifying.
Described light-receiving positioning system, be placed in the other end of engineering body, this system can be divided into optical axis positioning system and laser ranging positioning system two parts, as Fig. 5 a, 5b, shown in the 5c, the structure of optical axis positioning system and principle of work and above-mentioned measuring point collimation positioning system are basic identical, different is that the optical axis alignment sensor described in the measuring point colimated light system is replaced by the combination of the photovoltaic device among the accompanying drawing 5a 18 with CMOS or ccd image device 17, to be exactly many in addition shown in accompanying drawing 5a be placed in vertically to the CMOS or the ccd image sensor 17 on precise guide rail 11 tops, optical axis alignment sensor in the structure of photovoltaic device 18 and principle of work and the above-mentioned measuring point collimation positioning system is basic identical, size that different is is bigger, the centre has embedded an imageing sensor 17, this device can be followed the tracks of the center of the light beam of above-mentioned collimation laser device 1, can determine the volume coordinate of collimation laser shaft end in conjunction with described laser ranging positioning system.
Shown in accompanying drawing 5c, described from target-seeking laser ranging and positioning system by commercial high-precision laser range-finding instrument 22, miniature closely laser range finder 19, perpendicular in rotation drive in 20 surface levels that rotation drives 21, servo platform 5 is formed, the structure of servo platform 5 and principle of work are identical with above-mentioned servo platform 5, repeat no more herein.Drive 21 by rotation in rotation driving 20 and the surface level in the perpendicular, high-precision laser range-finding instrument 22 can be according to automatic each reference mark sought successively in the engineering body periphery deformation control net of coordinate backup under the control of MCU, and MCU can accurately sight the catoptron of settling on the reference mark by the judgement to reflective light intensity, then control described high-precision laser range-finding instrument 22 and find range, data send base station CPU in wireless or wired mode simultaneously and make adjustment processing;
The laser beam normal direction servo platform 5 of described miniature closely laser range finder 19, and project on CMOS shown in the accompanying drawing 5a or the ccd image device (alignment sensor) 17, can measure the distance of servo platform 5 to described image device 17 quickly and accurately, described image device 17 also will detect the horizontal coordinate of described laser beam projection simultaneously.
Described also be furnished with a firm nonmagnetic protective cover from target-seeking laser ranging and positioning system, as shown in Figure 6, photosensitive device 24 is equipped with in the inside of guard shield 23, MCU will detect shown in the accompanying drawing 5C by it, moving of the light beam that semiconductor laser 25 sends, and the control guard shield horizontally rotates CD-ROM drive motor 26 action, the level that makes 23 pairs of laser range finders 22 of described protective cover to rotation keep following; Automatically folding window 27 shown in the drawings, when laser range finder 22 work, in case of snow or dusty wind weather will be under the control of MCU auto-closing.
Claims (10)
1. automatic monitoring system for engineering project deformation, collimate positioning system, keep system and form by light emission system, light-receiving positioning system, measuring point from target-seeking laser ranging and positioning system, MCU control circuit and CPU control, energy resource system, environment, it is characterized in that settling light emission system and light-receiving positioning system respectively at the two ends of engineering body, set up the collimation laser axle of a level by these two systems, utilize the deformation control net of engineering body periphery, from the locus of target-seeking laser ranging with positioning system tracking laser axis, determine the space line equation of laser axis; A plurality of measuring points collimation positioning systems are distributed on the point to be monitored of engineering body along laser axis, and the level that detects point to be monitored and laser axis quadrature to reach vertical to the displacement with respect to laser axis; When any the signal output of the sensor that rains, air velocity transducer, sand and dust sensor reaches certain limit value, CPU will send signal to each subsystem, close its subsystem guard shield.
2. automatic monitoring system for engineering project deformation according to claim 1, it is characterized in that described each measuring point collimation positioning system all has independently the Detection ﹠ Controling system based on MCU, it exchanges as data with CPU in the light emission system by wireless data sending, and MCU and photoelectric device control are rotated in the horizontal direction from the guard shield of target-seeking laser ranging.
3. automatic monitoring system for engineering project deformation according to claim 2, it is characterized in that described measuring point with respect to the quadrature level of collimation laser axle and vertically to the position move; The energy of collimation positioning system is charged by high power laser by charging in the light emission system and ranging laser and provides.
4. automatic monitoring system for engineering project deformation according to claim 3, the servo platform that it is characterized in that described measuring point collimation positioning system is positioned on the survey pier of point to be monitored, the space of point to be monitored tilts and is detected by the high precision double-axis tilt sensor on the servo platform, and is adjusted by servo motor.
5. automatic monitoring system for engineering project deformation according to claim 1, it is characterized in that described light emission system comprises high-performance collimation laser device, high-power charging and ranging laser, servo platform, stabilized voltage supply, horizontal location sensor, MCU control circuit, cpu data treatment circuit, described high-performance collimation laser device is fixed on the servo platform, and servo platform adopts three screw rods to support motor servo-type or double freedom gravity inertial servo-type or dual rotary face motor servo-type.
6. automatic monitoring system for engineering project deformation according to claim 5, it is characterized in that described three screw rods support the motor servo platform and comprise that base, studdle, band reducer casing servo motor, displacement transducer, double-axis tilt sensor, magnetic declination sensor, micro-stepping advance motor, described base is supported by three studdles perpendicular to base and equal angles distribution, the Spin Control base pitching of studdle, servo respectively wherein two studdles of the servo motor of two band reducer casinges are to control base along the both direction pitching.
7. automatic monitoring system for engineering project deformation according to claim 6, it is characterized in that described double-axis tilt sensor is fixed on the base, its output signal will be controlled the servo motor action and be in horizontality all the time to keep base, and the tilt correction quantity of base is detected by two displacement transducers.
8. automatic monitoring system for engineering project deformation according to claim 7 is characterized in that described double-axis tilt sensor adopts absolute rotary encoder, and it is fixed on the reducer casing with described servo motor, detects the absolute rotation amount of studdle.
9. automatic monitoring system for engineering project deformation according to claim 6, it is characterized in that space level that described magnetic declination sensor can detect base to reverse, will control described micro-stepping and advance the motor action when this reverses when exceeding limit value described MCU control circuit to revise the direction of high-performance collimation laser device optical axis.
10. automatic monitoring system for engineering project deformation according to claim 1, it is characterized in that described light emission system, light-receiving positioning system, the same with positioning system with measuring point collimation positioning system from target-seeking laser ranging, be servo platform horizontal servo is provided, also be provided with geomagnetic sensor on each servo platform, by means of geomagnetic sensor, not only there has been directional reference in all systems in installation and operation, and the level that can detect engineering body two ends and all points to be monitored to reverse; Describedly aim at catoptron on the deformation reference mark automatically from the target-seeking laser ranging and the stadimeter of positioning system, protective cover is arranged on the catoptron, the folding window is by MCU and photosensitive device control on the protective cover.
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| US6173564B1 (en) * | 1999-02-22 | 2001-01-16 | The Dow Chemical Company | Apparatus for monitoring wet compression gas turbine power augmentation-related casing distortions |
| CN1546942A (en) * | 2003-11-28 | 2004-11-17 | 大连理工大学 | Vacuum laser dam deformation measuring method |
| CN1664494A (en) * | 2005-03-23 | 2005-09-07 | 西安交通大学 | Laser dam safety monitoring method |
-
2007
- 2007-05-28 CN CN2007100747170A patent/CN101063610B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3799674A (en) * | 1971-04-09 | 1974-03-26 | Comp Generale Electricite | System enabling the detecting of movements of a first element in relation to another |
| US6173564B1 (en) * | 1999-02-22 | 2001-01-16 | The Dow Chemical Company | Apparatus for monitoring wet compression gas turbine power augmentation-related casing distortions |
| CN1240270A (en) * | 1999-07-02 | 2000-01-05 | 清华大学 | Target space position and attitude laser tracking-measuring system and method |
| CN1546942A (en) * | 2003-11-28 | 2004-11-17 | 大连理工大学 | Vacuum laser dam deformation measuring method |
| CN1664494A (en) * | 2005-03-23 | 2005-09-07 | 西安交通大学 | Laser dam safety monitoring method |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107229808A (en) * | 2017-07-11 | 2017-10-03 | 武汉大学 | The infrared three-dimension positioner and positioning construction method of a kind of oval calotte building |
| CN107229808B (en) * | 2017-07-11 | 2019-06-25 | 武汉大学 | A kind of oval calotte building infrared three-dimension positioning device and positioning construction method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101063610A (en) | 2007-10-31 |
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