CN114234911B - Ultrasonic sedimentation and horizontal displacement measuring device using Beidou positioning - Google Patents
Ultrasonic sedimentation and horizontal displacement measuring device using Beidou positioning Download PDFInfo
- Publication number
- CN114234911B CN114234911B CN202111500707.5A CN202111500707A CN114234911B CN 114234911 B CN114234911 B CN 114234911B CN 202111500707 A CN202111500707 A CN 202111500707A CN 114234911 B CN114234911 B CN 114234911B
- Authority
- CN
- China
- Prior art keywords
- point
- ultrasonic
- coordinates
- concrete base
- points
- 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.)
- Active
Links
- 238000006073 displacement reaction Methods 0.000 title claims abstract description 20
- 238000004062 sedimentation Methods 0.000 title claims abstract description 15
- 238000005259 measurement Methods 0.000 claims abstract description 8
- 238000000034 method Methods 0.000 claims abstract description 7
- 230000002159 abnormal effect Effects 0.000 claims abstract description 4
- DMBHHRLKUKUOEG-UHFFFAOYSA-N diphenylamine Chemical compound C=1C=CC=CC=1NC1=CC=CC=C1 DMBHHRLKUKUOEG-UHFFFAOYSA-N 0.000 claims 1
- 239000002689 soil Substances 0.000 description 9
- 238000010276 construction Methods 0.000 description 5
- 238000000691 measurement method Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012625 in-situ measurement Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C5/00—Measuring height; Measuring distances transverse to line of sight; Levelling between separated points; Surveyors' levels
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B17/00—Measuring arrangements characterised by the use of infrasonic, sonic or ultrasonic vibrations
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S15/00—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems
- G01S15/02—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems using reflection of acoustic waves
- G01S15/06—Systems determining the position data of a target
- G01S15/08—Systems for measuring distance only
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- General Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Computer Networks & Wireless Communication (AREA)
- Length Measuring Devices Characterised By Use Of Acoustic Means (AREA)
Abstract
The invention discloses an ultrasonic sedimentation and horizontal displacement measuring device positioned by Beidou, which comprises: the device comprises a Beidou positioning device, an ultrasonic transmitting device, an ultrasonic receiving device, a vertical rod and a concrete base; the method comprises the following steps: the preparation stage: two datum points are selected to cast a concrete base, the concrete base is sequentially cast at each observation point respectively, and a measuring device is installed; and (3) an observation stage: inserting the installed measuring device into a hole reserved above the concrete base, starting the instrument, acquiring coordinates of each point through the Beidou positioning device, and respectively measuring the distance between each point through ultrasonic waves; and a data processing stage: and calculating the wide area distance between each two points according to the coordinates of each point, establishing a correlation relationship, removing abnormal data, establishing a regression function, correcting the coordinates of each point, and obtaining sedimentation and horizontal displacement of each point. The invention has simple structure, high measurement accuracy, simple and convenient operation and stronger economy, and can be suitable for different environments.
Description
Technical Field
The invention relates to the technical field of soft soil foundation settlement, in particular to an ultrasonic settlement and horizontal displacement measuring device positioned by Beidou.
Background
Under the load action of the building, the foundation can be settled along with the dissipation of the excess pore water pressure and the increase of the effective stress. If the foundation subsidence, especially uneven subsidence, is generated, once the allowable range of the building on the foundation is exceeded, the normal use of the building is affected, and even the conditions of cracking and inclination of the building, subgrade subsidence, dike collapse and the like are caused when the settlement of the foundation is serious, the foundation subsidence problem is very concerned by engineering personnel, and in-situ measurement is needed in actual engineering to determine the actual subsidence amount in the engineering.
Generally, current settlement observation can be classified into surface settlement observation, deep layered settlement observation and section settlement observation according to observation positions. In the current engineering (such as tunnel engineering), surface layer settlement observation is generally adopted, namely, a settlement plate is buried in a site, a settlement mark is connected, and the change of the height of the settlement plate is measured by a level meter, so that the settlement of the foundation in the area is calculated, but the method is not a convenient measurement method, and firstly, serious interference to construction is possibly generated in the operation process, and the safety of monitoring personnel cannot be ensured in a complex environment such as a construction site: secondly, the measurement is single, only the vertical deformation condition of the soil body can be monitored, and for some more complex projects, not only the vertical deformation of the soil body but also the horizontal displacement of the soil body are monitored, so that a better reference is provided for the safety of construction. The method for observing the horizontal displacement of the soil body which is commonly used at present is to use a total station and a scanner. But generally expensive, economy becomes a major problem.
Disclosure of Invention
The invention aims to solve the technical problem of providing the ultrasonic sedimentation and horizontal displacement measuring device which utilizes Beidou positioning, and the ultrasonic sedimentation and horizontal displacement measuring device has the advantages of simple structure, high measuring precision, simplicity and convenience in operation and stronger economy and is applicable to different environments.
In order to solve the technical problems, the invention provides an ultrasonic sedimentation and horizontal displacement measuring device using Beidou positioning, which comprises: the device comprises a Beidou positioning device, an ultrasonic transmitting device, an ultrasonic receiving device, a vertical rod and a concrete base; the Beidou positioning device is fixed on the vertical rod, the ultrasonic transmitting device and the ultrasonic receiving device are installed at the top of the vertical rod, the hole is reserved in the concrete base station, and the vertical rod with the ultrasonic transmitting device and the ultrasonic receiving device installed at the top is inserted into the reserved hole.
Correspondingly, the ultrasonic sedimentation and horizontal displacement measurement method utilizing Beidou positioning comprises the following steps:
(1) The preparation stage: two datum points are selected to pour the concrete base, then the concrete base is respectively poured at each observation point in sequence, and a measuring device is installed;
(2) And (3) an observation stage: inserting the installed measuring device into a reserved hole above the concrete base, starting the instrument, acquiring the coordinates of each point A, B, C, D through the Beidou positioning device, and respectively measuring the distance between AC, AD, BC, BD and the CD through ultrasonic waves;
(3) And a data processing stage: calculating AC, AD, BC, BD and the wide area distance between the CD according to the A, B, C, D point coordinates, establishing a correlation relationship by taking the ultrasonic measured distance as an abscissa and taking the wide area distance as an ordinate, removing abnormal data, and establishing a regression function; and correcting A, B, C, D the coordinates of each point according to the regression function, and comparing the last measurement results of each point to obtain the sedimentation and horizontal displacement of each point.
Preferably, in the step (2), the A, B, C, D four-point coordinates cannot be on the same plane, and any three-point coordinates cannot be on the same straight line.
Preferably, in the step (3), correcting A, B, C, D the coordinates of each point according to a regression function, comparing the last measurement results of each point, and obtaining the sedimentation and horizontal displacement of the points specifically includes the following steps:
(a) Knowing that the points A (B) and C are datum points, and knowing the side lengths AB, AD and BD in the triangle ABD, the angle BAD can be obtained according to the cosine law; the projection A1D1 of AE and AD on the horizontal plane can be obtained by the < BAD and the side length AD, and the z coordinate value ZD=zA-AE of the D point;
(b) The side lengths CD and DF=Z D-ZC are known in the triangle CDF, and the CDF can be obtained by the cosine theorem; the CF is the projection C 1D1 of the CD on the horizontal plane can be obtained by the < CDF and the side length CD;
(c) The projection points A 1、C1、D1 of A, C, D points on a horizontal plane form a triangle A 1C1D1, the known side length A 1C1、A1D1、C1D1 determines each internal angle value according to the cosine theorem, and the abscissa x D and the ordinate y D of the point D 1 can be obtained by the coordinates of the point A 1 and the side length A 1D1、∠C1A1D1;
(d) The steps (a) and (c) can determine the D coordinate of the to-be-measured point;
(e) And (3) when the distance between the points measured by the ultrasonic waves is lacking, correcting the wide area distance according to the established regression function, and determining the coordinates of the points to be measured according to the steps (a), (b) and (c).
The beneficial effects of the invention are as follows: the invention overcomes the defect of poor Beidou positioning precision, combines the advantages of Beidou wide-area positioning and ultrasonic local high precision, has higher economy, can observe the horizontal and vertical displacement of the soil body at the same time, has higher measuring precision and simple and convenient operation, can be suitable for settlement measurement under different soil deformation, does not influence the normal construction and use of engineering, ensures the personal safety of detection personnel, and reduces the use cost.
Drawings
FIG. 1 is a schematic flow chart of the method of the present invention.
FIG. 2 is a schematic diagram of a data processing process according to the present invention.
1, An ultrasonic wave transmitting device; 2. an ultrasonic wave receiving device; 3. the emitted ultrasonic waves; 4. a received ultrasonic wave; 5. the vertical rod and the Beidou positioning device; 6. a concrete foundation.
Detailed Description
An ultrasonic sedimentation and horizontal displacement measuring device using Beidou positioning, comprising: the device comprises a Beidou positioning device, an ultrasonic transmitting device, an ultrasonic receiving device, a vertical rod and a concrete base; the Beidou positioning device is fixed on the vertical rod, the ultrasonic transmitting device and the ultrasonic receiving device are installed at the top of the vertical rod, the hole is reserved in the concrete base station, and the vertical rod with the ultrasonic transmitting device and the ultrasonic receiving device installed at the top is inserted into the reserved hole.
As shown in fig. 1, an ultrasonic sedimentation and horizontal displacement measurement method using Beidou positioning comprises the following steps:
(1) The preparation stage: two datum points are selected to pour the concrete base, then the concrete base is respectively poured at each observation point in sequence, and a measuring device is installed;
(2) And (3) an observation stage: inserting the installed measuring device into a hole reserved above the concrete base, starting the instrument, acquiring A, B, C, D point coordinates through the Beidou positioning device, wherein the four selected point coordinates cannot be on the same plane, any three point coordinates cannot be on the same straight line, and measuring the distance between AC, AD, BC, BD and the CD through ultrasonic waves respectively;
(3) And a data processing stage:
1) Calculating AC, AD, BC, BD and the wide area distance between the CD by applying a distance formula between two points according to the A, B, C, D point coordinates acquired by the Beidou positioning device;
2) Establishing a correlation with the distance measured by ultrasonic waves as an abscissa and the wide area distance as an ordinate, removing abnormal data, and establishing a regression function;
3) As shown in fig. 2, two points a (B) and C are known as reference points, and the side lengths AB, AD, BD are known in the triangle ABD, so that the ++bad can be obtained according to the cosine theorem; the projection A1D1 of AE and AD on the horizontal plane can be obtained by the < BAD and the side length AD, and the z coordinate value ZD=zA-AE of the D point;
4) The side lengths CD and DF=Z D-ZC are known in the triangle CDF, and the CDF can be obtained by the cosine theorem; the CF is the projection C 1D1 of the CD on the horizontal plane can be obtained by the < CDF and the side length CD;
5) The projection points A 1、C1、D1 of A, C, D points on a horizontal plane form a triangle A 1C1D1, the known side length A 1C1、A1D1、C1D1 determines each internal angle value according to the cosine theorem, and the abscissa x D and the ordinate y D of the point D 1 can be obtained by the coordinates of the point A 1 and the side length A 1D1、∠C1A1D1;
6) The step 3) and the step 5) can determine the D coordinate of the to-be-measured point;
7) When the distance between the points measured by the ultrasonic waves is lacking, the wide area distance can be corrected according to the regression function established in the step (2), and then the coordinates of the points to be measured are determined according to the steps 3), 4) and 5).
The invention overcomes the defect of poor Beidou positioning precision, combines the advantages of Beidou wide-area positioning and ultrasonic local high precision, has higher economy, can observe the horizontal and vertical displacement of the soil body at the same time, has higher measuring precision and simple and convenient operation, can be suitable for settlement measurement under different soil deformation, does not influence the normal construction and use of engineering, ensures the personal safety of detection personnel, and reduces the use cost.
Claims (1)
1. Ultrasonic sedimentation and horizontal displacement measuring device that utilizes big dipper location, its characterized in that includes: the device comprises a Beidou positioning device, an ultrasonic transmitting device, an ultrasonic receiving device, a vertical rod and a concrete base; the Beidou positioning device is fixed on the vertical rod, an ultrasonic transmitting device and an ultrasonic receiving device are installed at the top of the vertical rod, a hole is reserved in the concrete base station, and the vertical rod with the ultrasonic transmitting device and the ultrasonic receiving device installed at the top is inserted into the reserved hole; ultrasonic sedimentation and horizontal displacement measurement by Beidou positioning comprise the following steps:
(1) The preparation stage: two datum points are selected to pour the concrete base, then the concrete base is respectively poured at each observation point in sequence, and a measuring device is installed;
(2) And (3) an observation stage: inserting the installed measuring device into a reserved hole above the concrete base, starting the instrument, acquiring the coordinates of each point A, B, C, D through the Beidou positioning device, and respectively measuring the distance between AC, AD, BC, BD and the CD through ultrasonic waves; A. b, C, D four-point coordinates cannot be on the same plane, and any three-point coordinates cannot be on the same straight line;
(3) And a data processing stage: calculating AC, AD, BC, BD and the wide area distance between the CD according to the A, B, C, D point coordinates, establishing a correlation relationship by taking the ultrasonic measured distance as an abscissa and taking the wide area distance as an ordinate, removing abnormal data, and establishing a regression function; correcting A, B, C, D each point coordinate according to the regression function, comparing the last measurement result of each point, and obtaining the sedimentation and horizontal displacement of each point; the method specifically comprises the following steps:
(a) Knowing that the points A (B) and C are datum points, and knowing the side lengths AB, AD and BD in the triangle ABD, the angle BAD can be obtained according to the cosine law; the projection A1D1 of AE and AD on the horizontal plane can be obtained by the < BAD and the side length AD, and the z coordinate value ZD=zA-AE of the D point;
(b) The side lengths CD and DF=Z D-ZC are known in the triangle CDF, and the CDF can be obtained by the cosine theorem; the CF is the projection C 1D1 of the CD on the horizontal plane can be obtained by the < CDF and the side length CD;
(c) The projection points A 1、C1、D1 of A, C, D points on a horizontal plane form a triangle A 1C1D1, the known side length A 1C1、A1D1、C1D1 determines each internal angle value according to the cosine theorem, and the abscissa x D and the ordinate y D of the point D 1 can be obtained by the coordinates of the point A 1 and the side length A 1D1、∠C1A1D1;
(d) The steps (a) and (c) can determine the D coordinate of the to-be-measured point;
(e) And (3) when the distance between the points measured by the ultrasonic waves is lacking, correcting the wide area distance according to the established regression function, and determining the coordinates of the points to be measured according to the steps (a), (b) and (c).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111500707.5A CN114234911B (en) | 2021-12-09 | 2021-12-09 | Ultrasonic sedimentation and horizontal displacement measuring device using Beidou positioning |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111500707.5A CN114234911B (en) | 2021-12-09 | 2021-12-09 | Ultrasonic sedimentation and horizontal displacement measuring device using Beidou positioning |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114234911A CN114234911A (en) | 2022-03-25 |
| CN114234911B true CN114234911B (en) | 2024-06-04 |
Family
ID=80754351
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111500707.5A Active CN114234911B (en) | 2021-12-09 | 2021-12-09 | Ultrasonic sedimentation and horizontal displacement measuring device using Beidou positioning |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114234911B (en) |
Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104976988A (en) * | 2015-07-14 | 2015-10-14 | 国家电网公司 | Tunnel large-elevation-difference settlement measuring system |
| CN106592563A (en) * | 2017-01-09 | 2017-04-26 | 河海大学 | Device for monitoring foundation settlement and measuring method thereof |
| CN106895821A (en) * | 2017-03-06 | 2017-06-27 | 成都中电卓景智能科技有限公司 | A kind of settlement monitoring street lamp based on BEI-DOU position system |
| CN108680706A (en) * | 2018-05-16 | 2018-10-19 | 华南农业大学 | The high-throughput plant phenotype measuring system of the horizontally moveable and vertical lifting type of one kind and method |
| CN109540095A (en) * | 2018-12-29 | 2019-03-29 | 北方信息控制研究院集团有限公司 | Roadbed settlement monitoring method based on satellite navigation and least square |
| CN208872290U (en) * | 2018-09-27 | 2019-05-17 | 山东科技大学 | One kind can survey sedimentation deformation Ultrasonic Borehole Television device |
| CN111190204A (en) * | 2020-01-08 | 2020-05-22 | 中国地质大学（武汉） | Real-time positioning device and method based on Beidou double antennas and laser range finder |
| CN111965678A (en) * | 2020-08-28 | 2020-11-20 | 北京大成国测科技有限公司 | Railway roadbed settlement monitoring system and method based on Beidou or GPS |
| CN212807145U (en) * | 2020-09-28 | 2021-03-26 | 广东邦盛北斗技术服务有限公司 | Railway slope detection system equipment based on Beidou satellite |
| CN112629488A (en) * | 2020-12-28 | 2021-04-09 | 北京市燃气集团有限责任公司 | Beidou-based settlement monitoring method and system |
| CN112797952A (en) * | 2021-01-28 | 2021-05-14 | 湖南联智科技股份有限公司 | Soft foundation settlement monitoring device |
| CN112902912A (en) * | 2021-01-13 | 2021-06-04 | 华东交通大学 | Railway monitoring and early warning system based on Beidou positioning technology |
| CN214748571U (en) * | 2021-01-24 | 2021-11-16 | 广东邦盛北斗产业研究院有限公司 | Bridge stress monitoring devices based on big dipper |
-
2021
- 2021-12-09 CN CN202111500707.5A patent/CN114234911B/en active Active
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104976988A (en) * | 2015-07-14 | 2015-10-14 | 国家电网公司 | Tunnel large-elevation-difference settlement measuring system |
| CN106592563A (en) * | 2017-01-09 | 2017-04-26 | 河海大学 | Device for monitoring foundation settlement and measuring method thereof |
| CN106895821A (en) * | 2017-03-06 | 2017-06-27 | 成都中电卓景智能科技有限公司 | A kind of settlement monitoring street lamp based on BEI-DOU position system |
| CN108680706A (en) * | 2018-05-16 | 2018-10-19 | 华南农业大学 | The high-throughput plant phenotype measuring system of the horizontally moveable and vertical lifting type of one kind and method |
| CN208872290U (en) * | 2018-09-27 | 2019-05-17 | 山东科技大学 | One kind can survey sedimentation deformation Ultrasonic Borehole Television device |
| CN109540095A (en) * | 2018-12-29 | 2019-03-29 | 北方信息控制研究院集团有限公司 | Roadbed settlement monitoring method based on satellite navigation and least square |
| CN111190204A (en) * | 2020-01-08 | 2020-05-22 | 中国地质大学（武汉） | Real-time positioning device and method based on Beidou double antennas and laser range finder |
| CN111965678A (en) * | 2020-08-28 | 2020-11-20 | 北京大成国测科技有限公司 | Railway roadbed settlement monitoring system and method based on Beidou or GPS |
| CN212807145U (en) * | 2020-09-28 | 2021-03-26 | 广东邦盛北斗技术服务有限公司 | Railway slope detection system equipment based on Beidou satellite |
| CN112629488A (en) * | 2020-12-28 | 2021-04-09 | 北京市燃气集团有限责任公司 | Beidou-based settlement monitoring method and system |
| CN112902912A (en) * | 2021-01-13 | 2021-06-04 | 华东交通大学 | Railway monitoring and early warning system based on Beidou positioning technology |
| CN214748571U (en) * | 2021-01-24 | 2021-11-16 | 广东邦盛北斗产业研究院有限公司 | Bridge stress monitoring devices based on big dipper |
| CN112797952A (en) * | 2021-01-28 | 2021-05-14 | 湖南联智科技股份有限公司 | Soft foundation settlement monitoring device |
Non-Patent Citations (6)
| Title |
|---|
| 全站仪后方交会法在大坝护坡变形监测中的运用;乐慧至;唐义智;;中国水运(下半月);20130915(第09期);全文 * |
| 全站仪在隧道监控量测中的应用研究;陈秀强;;福建交通科技;20171020(第05期);全文 * |
| 国内河工模型地形测量方法研究综述;陈诚;唐洪武;陈红;黄建通;;水利水电科技进展;20090420(第02期);全文 * |
| 地表微地形测量及定量化方法研究综述;朱良君;张光辉;;中国水土保持科学;20131015(第05期);全文 * |
| 套管井偶极弯曲波频散向高频偏移的特性;李刚;吕伟国;崔志文;马俊;王克协;谢荣华;刘继生;吕秀梅;;地球物理学报;20180115(第01期);全文 * |
| 朱良君 ; 张光辉 ; .地表微地形测量及定量化方法研究综述.中国水土保持科学.2013,(第05期),全文. * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114234911A (en) | 2022-03-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Tang et al. | Characterization of laser scanners and algorithms for detecting flatness defects on concrete surfaces | |
| CN103913145B (en) | A kind of crack openings double-deformation monitoring of structures and measuring method | |
| CN108280969B (en) | High-slope surface deformation monitoring and early warning system and early warning method thereof | |
| CN111783193A (en) | Effective earth volume calculation method for bad foundation road | |
| CN106770643A (en) | The method that bottom-enlarging filling pile pile grouting effect is detected based on Acoustic Wave Propagation principle | |
| CN115420328A (en) | Method for detecting scouring of wind power pile foundation | |
| CN113254850B (en) | River channel sludge amount monitoring and calculating method | |
| CN210741454U (en) | Bridge pier deformation monitoring system | |
| CN114234911B (en) | Ultrasonic sedimentation and horizontal displacement measuring device using Beidou positioning | |
| CN107100213A (en) | Soil disturbance monitoring system and monitoring method of the bridge construction of pile groups to adjacent piles | |
| CN113514554B (en) | Nondestructive foundation pile detection method based on pile outer cross hole | |
| CN112835031B (en) | Intelligent rolling-oriented face rockfill dam compaction quality nondestructive testing method | |
| CN112254764B (en) | System and method for rapidly positioning and monitoring dam leakage channel | |
| Tran et al. | Determining surface roughness in erosion testing using digital photogrammetry | |
| CN117148361A (en) | Offshore wind power pile foundation ultrasonic high-precision distance measurement method, system and storage medium | |
| CN103410135B (en) | Riverbed level measurement method based on network drill rod detection | |
| CN116592938A (en) | Multifunctional observation tube for earth and rockfill dam | |
| CN107655539B (en) | Water level monitoring method and system | |
| CN115728792A (en) | Checking method for full-floating gravel foundation bed laying measuring equipment | |
| CN107816933B (en) | GNSS reference station displacement checking method and device | |
| CN210737312U (en) | Roadbed deformation monitoring system | |
| CN104032630A (en) | Method for continuously measuring track settlement based on angle transmission | |
| JPS58118902A (en) | Method for measuring vertical displacement quantity and deflection quantity of structure | |
| TWI650574B (en) | Tdr device and method for monitoring subsidence variation | |
| TWI400434B (en) | Method and system for silt consistency measurement |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |