CN1542407A - Micro displacement measuring method - Google Patents
Micro displacement measuring method Download PDFInfo
- Publication number
- CN1542407A CN1542407A CNA2003101139259A CN200310113925A CN1542407A CN 1542407 A CN1542407 A CN 1542407A CN A2003101139259 A CNA2003101139259 A CN A2003101139259A CN 200310113925 A CN200310113925 A CN 200310113925A CN 1542407 A CN1542407 A CN 1542407A
- Authority
- CN
- China
- Prior art keywords
- microwave
- micro displacement
- micrometric displacement
- corner reflector
- wave line
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Landscapes
- Testing Or Calibration Of Command Recording Devices (AREA)
Abstract
The micro displacement measuring technology of the present invention is used in micro displacement measurement and dangerous condition prediction of disaster geological are or large building. One passive angular reflector of three cheap aluminum plates is set in the measured point and one microwave phase comparing device is set in the monitoring point. The phase comparing device sends one single frequency microwave beam and the triangular reflector reflects the microwave beam for the receiver in the phase comparing device to receive. Through phase comparison, micro displacement of mm level may be measured. In the case of micro displacement direction perpendicular to the electric wave transmitting direction, the bent tube measuring technology of the present invention may be used. The present invention has low cost and high measurement precision.
Description
Technical field: microdisplacement measurement
Background technology: southern NGK-500/600 double frequency RTK measuring system
The slope, bank, storehouse of large reservoir, mountain highway, railway slope have geologic hazards such as crag, landslide, ground cleave.Heavy construction meeting generation micrometric displacement, little distortion such as bridge, dam, skyscraper.The micrometric displacement amount is the main monitoring parameter of danger warning.To the monitoring technology of micrometric displacement, a kind of is pre-buried Fibre Optical Sensor when the buildings deposit concrete.Analyze the micrometric displacement amount by the Fibre Optical Sensor output signal.In case Fibre Optical Sensor is bad in concrete in long-term the use, almost can not repair.Can't bury Fibre Optical Sensor underground in situations such as buildings that has built up or crags in addition at all.More advanced is with present up-to-date GPS measuring technique: " difference double frequency carrier wave ratio is measured mutually ".Its measuring accuracy reaches 5mm+1ppm * D; D is the distance of base station to tested point.This technology is introduced French technology by south mapping company and is produced equipment.Annex 1 is the background technology data.Problem is 1. NGK-500/600 to be used for (600,000 of the import of microdisplacement measurement cost height, homemade 240,000), the a large amount of use (certain large reservoir storehouse bank needs 1000 monitoring points) is unrealistic, 2. use complicated, need set up base station, measured point to establish between substation, substation and the main website also needs the radio station to be connected, 3. substation need be erected at measured point (as crag, landslide, bridge, dam etc.), so long term monitoring need be powered, and make a cell and seek shelter from wind and rain, anti-people or poultry are invaded, 4. collapsed in the measured point, and sub-station equipment has also been broken.
Summary of the invention:
The fundamental measurement system: the fundamental measurement system is made of than equipment 2 mutually the microwave on the corner reflector 1 and the measuring point that are placed on the measured point shown in Figure of description 1.And it is approximate parallel to establish micrometric displacement direction and wave line.The 1st, corner reflector is made of three blocks of aluminium sheets.Corner reflector has extremely strong reflectivity to microwave, and it is returned the microwave that incides it by the original route total reflection.(mother-of-pearl glass on the similar night highway, lamp of picture under car light irradiation).The 2nd, microwave is than phase measuring equipment assembly.The 3rd, the 40MHz oscillator.4, the 12nd, frequency mixer.The 5th, the 5590MHz local vibration source.6, the 11st, the 5630MHz bandpass filter.The 7th, power amplifier.8, the 9th, antenna.The 10th, low noise amplifier.The 13rd, the 40MHz intermediate frequency amplifier.The 14th, phase detector.The 15th, level indicator.The 16th, the complete cycle counter.Used two antennas in this programme, only done because of the same frequency diplexer of high-isolation is difficult.
5590MHz local oscillation signal mixing in 4 of the 3 40MHz simple signals that produce and 5 generations obtain the simple signal of 5630MHz after 6 filtering.After 7 power amplifications, be radiated 1 on the measured point by 8.1 reflects through 9 by original route and to receive, and 10 make low noise amplifies, after 11 filtering with the 5 5590MHz local oscillation signal mixing in 12 that produce, again through 13 after making intermediate frequency and amplifying the 40MHz intermediate-freuqncy signal.The 40MHz signals that this intermediate-freuqncy signal and 3 produces than mutually, must be represented the level U=k * φ of phase differential in 14; K is a proportionality constant; φ is a phase differential, is shown by 15 usefulness level, or this level numeral after the A/D conversion is shown.Too big as displacement, make phase difference surpass 360 degree, then make complete cycle counting meter by 16, establishing the complete cycle number is N.
If radio frequency is 5630MHz, corresponding wavelength λ=5.33Cm.If the measured point with respect to measuring point the displacement of Δ R has taken place, then phase differential changes Δ φ=720 * Δ R/ λ degree.Or Δ U=k * 720 * Δ R/ λ.After measuring Δ U, inverse Δ R=λ * Δ U/k/720.Resolution as phase measurement is
Δ φ=10 degree, or the resolution of level measurement is
Δ U=k * 10.The resolution of corresponding microdisplacement measurement is
Δ R=5.33 * 10/720=0.074Cm=0.74mm.If displacement surpasses wavelength X, then absolute displacement is R=N * λ+Δ R.
The bend pipe measuring system; Hypothesis micrometric displacement direction is approximate parallel with wave line in the fundamental measurement system.The micrometric displacement amount of measuring is the projection of actual micrometric displacement amount at wave line.If micrometric displacement and electric wave direction near normal can not surveyed micrometric displacement.If run into situation shown in Figure of description 2, measuring point need be located at below the crag, and this is dangerous.Bend pipe measuring system shown in the Figure of description 2 just can address this problem.Change wave line with a reflecting plate.Adjust the reflecting plate angle, make point position one effectively, safety, convenient place.The bend pipe accuracy of measurement system is identical with the fundamental measurement system.Corner reflector, reflecting plate might as well all be that cheap aluminium sheet constitutes, and also problem is little even damaged by pressure.
Claims (2)
1, a kind of microdisplacement measurement technology is characterized in that: to micrometric displacement direction and the approximately parallel situation of wave line, place a corner reflector in the measured point, place a microwave in the monitoring point than phase measurement mechanism.Radiating portion than phase measurement mechanism is launched a single-frequency microwave to corner reflector.Corner reflector is returned the microwave that incides it by the original route total reflection.The microwave signal that reflects than the receiving unit acceptance angle reverberator of phase measurement mechanism.Through with transmit than recording the micrometric displacement amount mutually.
2, to micrometric displacement direction and the approximately perpendicular situation of wave line, then adopt bent tube measuring technology.Change wave line with a reflecting plate, adjust the reflecting plate angle, make point position one effectively, safety, convenient place.The bend pipe accuracy of measurement system is identical with the fundamental measurement system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200310113925 CN1271419C (en) | 2003-11-04 | 2003-11-04 | Micro displacement measuring method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200310113925 CN1271419C (en) | 2003-11-04 | 2003-11-04 | Micro displacement measuring method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1542407A true CN1542407A (en) | 2004-11-03 |
| CN1271419C CN1271419C (en) | 2006-08-23 |
Family
ID=34336990
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200310113925 Expired - Fee Related CN1271419C (en) | 2003-11-04 | 2003-11-04 | Micro displacement measuring method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1271419C (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101839704A (en) * | 2010-03-30 | 2010-09-22 | 杨士中 | Power line and bridge swing measuring method |
| CN101349753B (en) * | 2008-05-30 | 2011-03-16 | 重庆大学 | Deformation telemetry technology of large-scale buildings |
| CN102830395A (en) * | 2012-05-30 | 2012-12-19 | 重庆大学 | High-precision phase type microwave distance measuring device and method |
| CN103308911A (en) * | 2013-06-06 | 2013-09-18 | 重庆大学 | Micro-displacement measurement method and system based on range deception technology |
| CN103792531A (en) * | 2014-02-21 | 2014-05-14 | 重庆大学 | Multi-target micrometric displacement measuring method based on antenna array |
| CN106680804A (en) * | 2017-01-03 | 2017-05-17 | 郑州云海信息技术有限公司 | Multipoint micro-displacement measurement method for large-scale equipment |
| CN106772345A (en) * | 2017-03-16 | 2017-05-31 | 重庆大学 | A kind of remote plug and play type displacement radar target reflector |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2621473C1 (en) * | 2016-07-13 | 2017-06-06 | Федеральное государственное автономное образовательное учреждение высшего образования "Национальный исследовательский Нижегородский государственный университет им. Н.И. Лобачевского" | Device for remote measuring mutual element displacement of buildings and structures |
-
2003
- 2003-11-04 CN CN 200310113925 patent/CN1271419C/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101349753B (en) * | 2008-05-30 | 2011-03-16 | 重庆大学 | Deformation telemetry technology of large-scale buildings |
| CN101839704A (en) * | 2010-03-30 | 2010-09-22 | 杨士中 | Power line and bridge swing measuring method |
| CN101839704B (en) * | 2010-03-30 | 2011-09-28 | 杨士中 | Power line and bridge swing measuring method |
| CN102830395A (en) * | 2012-05-30 | 2012-12-19 | 重庆大学 | High-precision phase type microwave distance measuring device and method |
| CN103308911A (en) * | 2013-06-06 | 2013-09-18 | 重庆大学 | Micro-displacement measurement method and system based on range deception technology |
| CN103792531A (en) * | 2014-02-21 | 2014-05-14 | 重庆大学 | Multi-target micrometric displacement measuring method based on antenna array |
| CN106680804A (en) * | 2017-01-03 | 2017-05-17 | 郑州云海信息技术有限公司 | Multipoint micro-displacement measurement method for large-scale equipment |
| CN106772345A (en) * | 2017-03-16 | 2017-05-31 | 重庆大学 | A kind of remote plug and play type displacement radar target reflector |
| CN106772345B (en) * | 2017-03-16 | 2023-09-26 | 重庆大学 | Remote plug-and-play type displacement radar target reflector |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1271419C (en) | 2006-08-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203881941U (en) | Radar device for monitoring settlement of high-speed rail roadbed | |
| CN107314749A (en) | Subway tunnel deformation based on laser distance measuring principle is monitored and early warning system in real time | |
| CN201811722U (en) | Tunnel surrounding rock deformation monitoring and alarm device | |
| CN1271419C (en) | Micro displacement measuring method | |
| CN101349753B (en) | Deformation telemetry technology of large-scale buildings | |
| CN106382972B (en) | A kind of single hole water table measure method and real time monitoring apparatus | |
| CN111623719B (en) | Laser net monitoring system and monitoring method for monitoring deformation and settlement of building | |
| CN108959637A (en) | A kind of geology big data platform for urban planning and construction | |
| Ma et al. | Structural displacement sensing techniques for civil infrastructure: A review | |
| CN201852585U (en) | Laser device for monitoring relative displacement of bridge structure | |
| CN217845170U (en) | Automatic settlement monitoring system | |
| CN101839704B (en) | Power line and bridge swing measuring method | |
| Wang et al. | Structural deformation monitoring during tunnel construction: A review | |
| CN210091345U (en) | Large dangerous rock collapse real-time monitoring and early warning system | |
| CN101713630B (en) | Stay cable type displacement meter calibration device | |
| CN209978817U (en) | Multiple reflection type measuring device for high-precision remote displacement measurement | |
| CN113137928A (en) | Deep rock-soil body optical fiber inclination measuring system based on optical frequency domain reflection technology | |
| CN203587070U (en) | Internet of things and ultrasonic-based bridge displacement and expansion joint width telemetry system | |
| JP3386367B2 (en) | Surface displacement detector | |
| CN112504343A (en) | Iron tower state intelligent monitoring system | |
| Cook et al. | Sensor networks and surveys for monitoring cliff erosion and failure events: a case study of coastal San Diego | |
| CN2575606Y (en) | Electronic watch lock | |
| CN215575658U (en) | Beidou InSAR integrated observation device suitable for railway roadbed deformation monitoring | |
| CN218297164U (en) | Road monitoring device of highway tunnel changeover portion driving safety early warning system | |
| US20240159576A1 (en) | Vandal-proof installation system for the monitoring of physical variables in water, comprising: a first member; a second member; a third member and a fourth member; where the first member comprises a plurality of compartments for housing a plurality of devices. assembly method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| DD01 | Delivery of document by public notice |
Addressee: Deng Xiaoqin Document name: Notification to Pay the Fees |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20060823 Termination date: 20171104 |