CN106323170B - The method of real-time of concrete vibrating quality based on laser three-D positioning - Google Patents
The method of real-time of concrete vibrating quality based on laser three-D positioning Download PDFInfo
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- CN106323170B CN106323170B CN201610850466.XA CN201610850466A CN106323170B CN 106323170 B CN106323170 B CN 106323170B CN 201610850466 A CN201610850466 A CN 201610850466A CN 106323170 B CN106323170 B CN 106323170B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/002—Measuring arrangements characterised by the use of optical techniques for measuring two or more coordinates
- G01B11/005—Measuring arrangements characterised by the use of optical techniques for measuring two or more coordinates coordinate measuring machines
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- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
- On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
Abstract
The present invention relates to a kind of method of real-time of concrete vibrating quality based on laser three-D positioning, including step 1: arranging the measuring point of laser detector, and sensing point is fixed reference point coordinate input picture processing system or record relatively；Step 2: the initial value of vertical position is determined；Step 3: the plan-position of vibrating spear operating point, step 4: the vertical displacement of acquisition are obtained；Step 5: the distribution drawing vibrating spear plane and vertically putting；According to data acquiring frequency and processing speed, the real-time or later period construction quality analysis chart that vibrates can be generated.The present invention is by the laser probe of transmission or storage and light source distance value, the coordinate value to vibrate in plane a little can be calculated, in addition the depth value that laser probe measures, it is vibrated the distribution of position and a depth profile by the real-time display in the coordinate position of the opposite reference point of acquisition, measuring point distribution and the depth profile in entire work progress can be drawn, there is high promotional value and social benefit.
Description
Technical field
The present invention relates to the concrete construction quality monitoring technology fields in a kind of construction engineering, specifically base
In the method for real-time of the concrete vibrating quality of laser three-D positioning.
Background technique
With China's expanding economy, infrastructure and Urbanization Construction amount increase sharply.Reinforced concrete works, especially
It is that mass concrete construction engineering in heavy construction obviously increases, construction speed is obviously accelerated.In addition construction management
The raising of quality requires to be increasingly stringenter to the construction quality of concrete.Even if using mechanized construction concrete casting with
It vibrates and is still unable to ensure the concrete of all positions and is uniformly vibrated.Especially in road, airport, harbour, box foundation etc.
In the work progress of large area concrete, how to ensure manually or mechanically to vibrate and realize uniform no dead angle, and it is slotting to guarantee to vibrate
Enter depth and reach prescribed limit, is construction Supervision and construction quality problems faced.
In fact, there are many kinds for current real time positioning technology, also there are many applications in architectural engineering and construction industries,
Including GPS, radio identification technology and visible sensor etc..These methods are excessively complicated and expensive, or are influenced by weather bright
Aobvious or data precision is poor, or can only carry out One-Point Location, and can not following vibrating spear, quickly movement is positioned, especially
The monitoring for depth of vibrating is not can be carried out.
Summary of the invention
The present invention is directed to overcome the deficiencies of existing technologies, a kind of concrete vibrating quality based on laser three-D positioning is provided
Method of real-time, the tool that vibrates such as the position distribution of concrete vibrating point can be monitored in real time, while monitoring vibrating spear
The method of insertion point depth value provides foundation for the monitoring of concrete construction quality, the plane recorded in real time vibrate distribution and
Insertion depth can provide necessary data support for later period inspection of quality and quality management.
In order to solve the above-mentioned technical problem, the present invention is implemented as follows:
A kind of method of real-time of the concrete vibrating quality based on laser three-D positioning, it is characterised in that it includes such as
Lower step:
Step 1: in concrete construction work at least three laser detector measuring point of horizontal layout, guarantee laser detector
Mark post work face perpendicular to concrete construction, laser detector has and signal emission module, signal receiving module and can detect
To the probe of laser position, by the relatively fixed reference point coordinate input picture processing system or record of sensing point；
Step 2: vibrating spear is vertical with working face, laser emitter is fixed on vibrating spear, laser emitter has
Signal emission module and signal receiving module, laser emitter have the transmitting light source of lasing area form, and lasing area has automatic
Level correction function opens laser area source, records vibrating spear initial working height as initial value；
Step 3: mobile vibrating spear when different location is vibrated, visit to laser by laser emitter in casting Concrete
The time signal that the signal receiving module transmitting laser that device integrates issues is surveyed, vibrating spear and laser detector can be from as laser
Rangefinder function, the linear distance between measuring laser detector in time and vibrating a little, related data pass to data analysis mode,
It is laser source position by three circle intersection concurrents, can dynamically acquires vibrating spear and vibrate a plan-position；Laser detector is connecing
After receiving laser signal, signal processing system is sent by lasing area present position；
Step 4: corresponding laser area source opens and closes, thus vertically during vibrating spear is inserted into and lifts
Mobile beginning and end has laser to be detected, and laser detector receives light source sensing of the light source on laser detector and passes
Sensor is mobile, acquires surface of light source vertical displacement in real time by laser displacement sensor, and then can acquire vibrating spear insertion depth
Variation, that is, can determine vibrating spear depth value；
Step 5: according to the working face figure that above-mentioned preset laser detector point is drawn referring to ratio, by step 3
The vibrating spear of acquisition vibrates plan-position a little, in conjunction with the initial value for the vertical position that step 2 determines, obtains by step 4
Vertical displacement, the distribution that vibrating spear plane can be drawn out and vertically put；It, can be real according to data acquiring frequency and processing speed
When or the later period generate and vibrate construction quality analysis chart.
The method of real-time of the concrete vibrating quality based on laser three-D positioning, it is characterised in that: three
Three probes of laser detector are not blocked and do not arrange on the same line.
The method of real-time of the concrete vibrating quality based on laser three-D positioning, it is characterised in that: described
The signal emission module and signal receiving module of laser detector and laser emitter are wirelessly or non-wirelessly.
The method of real-time of the concrete vibrating quality based on laser three-D positioning, it is characterised in that: described
Laser emitter energy integrated signal receive and emission function, after the transmitting signal for receiving all laser detectors, concentrate and send
To signal processing system.
The method of real-time of the concrete vibrating quality based on laser three-D positioning, it is characterised in that: described
Laser emitter and laser detector signal sent out in advance after host computer is handled, then by being integrated in laser detector or laser
Signal emission module in emitter carries out storage or real-time display to be wirelessly or non-wirelessly transferred to monitoring terminal.
The beneficial effects of the present invention are: can effectively monitor vibrating spear etc. vibrate equipment insertion point position and insertion it is deep
Degree, a position of being vibrated accordingly by real-time data record, can guiding construction personnel uniformly vibrated, while also be management
Personnel mitigate field surveillance workload, and the monitoring record automatically formed also provides foundation for later period performance rating.
Three-dimensional localization techniques proposed by the present invention based on laser set up small-area network by laser range sensor,
Realize the real-time positioning of plane and depth, then by mature bluetooth, broadband, Wi-Fi, Cellular, ZigBee, RuBee etc.
Wireless networking protocol realizes data transmission and access.
The monitoring of vibrate a plan-position and depth provided by the invention monitors, especially for large-sized concrete construction quality
It monitors, provides accurate, intuitive, quick in the work progress of the large area concretes such as road, airport, harbour, box foundation
Recording method, it is ensured that manually or mechanically vibrate and realize uniform no dead angle, it is to subtract that the guarantee insertion depth that vibrates, which reaches prescribed limit,
Few site operation management amount and difficulty, it is ensured that the tool of construction quality, with high promotional value and society's effect
Benefit.
Detailed description of the invention
The present invention will be further described in detail below with reference to the accompanying drawings and embodiments:
Fig. 1 is the circle intersection unique geometrical principle schematic diagram of intersection point of plane positioning three that the present invention uses.
Fig. 2 is that the embodiment of the present invention provides measuring point horizontal layout and implementation diagram.
Fig. 3 is vertical displacement positioning schematic diagram of the present invention.
Fig. 4 is the signal transmission path schematic diagram in embodiment.
In figure, 1. laser emitters, 2 laser detector, 3 lasing area in-position, 4 barrier (such as: wall) 5 is mixed
Solidifying soil construction working face.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
As shown in Figs 1-4: a kind of method of real-time of the concrete vibrating quality based on laser three-D positioning, it includes
Following steps:
Step 1: in concrete construction work plane 5, being respectively arranged three 2 measuring points of laser detector in barrier 4,
Guarantee the mark post of laser detector perpendicular to concrete construction work face 5, laser detector has wireless signal transmitting module, nothing
Line signal receiving module and the probe that can detect laser position, three probes of three laser detectors are not blocked and do not exist
It is arranged on same straight line, by the relatively fixed reference point coordinate input picture processing system or record of sensing point；
Step 2: vibrating spear is vertical with working face, laser emitter 1, Laser emission utensil are fixed on vibrating spear
There are signal emission module and signal receiving module, laser emitter has the transmitting light source of lasing area form, has lasing area in Fig. 2
Position 3 on earth, lasing area have automatic horizontal calibration function, laser area source are opened, and record vibrating spear initial working height
As initial value；
Step 3: mobile vibrating spear when different location is vibrated, visit to laser by laser emitter in casting Concrete
The time signal that the integrated signal receiving module transmitting laser of device issues is surveyed, the integrated signal receiving module of laser detector can be real
When receive laser light source launch time, after receiving laser signal, can according to laser emission time and receiving time difference in time
Laser transfer distance is calculated, and sends calculated result or direct passing time to acquisition system by wireless signal emission function
Difference calculates laser transfer distance by signal processing software；
Vibrating spear and laser detector can measure in time laser detector and vibrate a little from laser range finder function is used as
Between linear distance, it is laser source position by three circle intersection concurrents that related data, which passes to data analysis mode, can dynamic
Vibrating spear is acquired to vibrate a plan-position；Laser detector sends lasing area present position to after receiving laser signal
Signal processing system；
Step 4: corresponding laser area source opens and closes, thus vertically during vibrating spear is inserted into and lifts
Mobile beginning and end has laser to be detected, and laser detector receives light source sensing of the light source on laser detector and passes
Sensor is mobile, acquires surface of light source vertical displacement in real time by laser displacement sensor, and then can acquire vibrating spear insertion depth
Variation, that is, can determine vibrating spear depth value；
Step 5: according to the working face figure that above-mentioned preset laser detector point is drawn referring to ratio, by step 3
The vibrating spear of acquisition vibrates plan-position a little, in conjunction with the initial value for the vertical position that step 2 determines, obtains by step 4
Vertical displacement, the distribution that vibrating spear plane can be drawn out and vertically put；It is determined according to the fixed laser detector
Plan-position and vertical displacement are shown by computerized image technology by the real-time of coordinate position of the opposite reference point of detector
Show vibrate position distribution and a depth profile, measuring point distribution and depth profile in entire work progress can be drawn.
By Computerized three-dimensional image technique, the variation and depth of the position that can be vibrated by drafting relative coordinate position real-time display
Spend position；According to data acquiring frequency and processing speed, the real-time or later period construction quality analysis chart that vibrates can be generated.
The laser emitter energy integrated signal receives and emission function, receives the transmitting signal of all laser detectors
Afterwards, and by its emission function concentration it is sent to signal processing system；The laser emitter and laser detector signal mentions
It is preceding after host computer is handled, then the signal emission module by being integrated on laser detector or laser emitter, with wireless or
Wire transmission carries out storage or real-time display to neighbouring monitoring terminal.
Basic principle of the invention can be calculated arbitrarily putting in plane by least three datum marks in plane
Positioning.The technology is based on Laser Detection Technique, in pouring concrete construction site layout project three or more permanent datums, and
The point arranges corresponding laser detector and wireless signal feedback, vibrates the transmitting of the laser area source on utensil by vibrating spear etc.
Laser signal, using the signal recording laser launch point time and receiving time for receiving permanent datum, to calculate in real time
Out reference point locations with vibrate at a distance from a little, so as to obtain the position vibrated a little according to three-point fix.It is inserted into vibrating spear
In the process, the descending depth of the real-time recording laser area source of each reference point, that is, vertical displacement variation.In conjunction with above-mentioned plane and height
Direction as a result, realizing that the implementation of the plane distribution vibrated a little and depth of vibrating monitors.
The monitoring method includes three or more laser pick-off detectors, and triangulation point form as maximum as possible is fixed on specific
Working face position, and integrated reception of wireless signals and emission function module；One is fixed on vibrator with lasing area
Emission source, same integrated wireless signal receives and emission function module.Poor, the meter by the transmitting of real-time recording laser and receiving time
Three receiving points are calculated at a distance from launch point；It, can be real by drawing relative coordinate position by Computerized three-dimensional image technique
When display vibrate a position variation and depth location.
When being vibrated with vibrating spear, by one lasing area of puberty that vibrates, which automatically corrects with level
Function guarantees that lasing area can be orthogonal with the laser detector of at least three arrangements, to can calculate according to the laser propagation time
Each detector vibrates at a distance from a little with all out, by the three circle unique geometrical principles of crosspoint, orients vibrating spear institute
In position.Again by laser displacement sensor principle, the insertion of vibrating spear is determined by the vertical displacement of the lasing area detected
Depth.
The above is merely preferred embodiments of the present invention, it is not intended to limit the invention.It is all in spirit of the invention and
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within principle.
Claims (4)
1. a kind of method of real-time of the concrete vibrating quality based on laser three-D positioning, it is characterised in that it includes as follows
Step:
Step 1: in concrete construction work at least three laser detector measuring point of horizontal layout, there are three laser detectors
Three probes are not blocked and do not arrange on the same line；Guarantee that the mark post of laser detector works perpendicular to concrete construction
Face, laser detector has signal emission module, signal receiving module and the probe that can detect laser position, by sensing point
Relatively fixed reference point coordinate input picture processing system or record；
Step 2: vibrating spear is vertical with working face, laser emitter is fixed on vibrating spear, laser emitter has signal
Transmitting module and signal receiving module, laser emitter have the transmitting light source of lasing area form, and lasing area has automatic horizontal
Calibration function opens laser area source, records vibrating spear initial working height as initial value；
Step 3: in casting Concrete, for mobile vibrating spear when different location is vibrated, laser emitter is to laser detector
The time signal that integrated signal receiving module transmitting laser issues, vibrating spear and laser detector can be from as laser rangings
Instrument function, the linear distance between measuring laser detector in time and vibrating a little, related data passes to data analysis mode, by three
Circle intersection concurrent is laser source position, can dynamically acquire vibrating spear and vibrate a plan-position；Laser detector is receiving
After laser signal, signal processing system is sent by lasing area present position；
Step 4: corresponding laser area source opens and closes, thus vertically moving during vibrating spear is inserted into and lifts
Beginning and end has laser to be detected, and laser detector receives light source sensing sensor of the light source on laser detector
It is mobile, acquire surface of light source vertical displacement in real time by laser displacement sensor, and then the variation of vibrating spear insertion depth can be acquired,
It can determine vibrating spear depth value；
Step 5: being obtained according to the working face figure that above-mentioned preset laser detector point is drawn referring to ratio by step 3
Vibrating spear vibrate plan-position a little, in conjunction with the initial value for the vertical position that step 2 determines, obtained by step 4 perpendicular
To displacement, the distribution that vibrating spear plane can be drawn out and vertically put；According to data acquiring frequency and processing speed, can in real time or
Later period generates the construction quality analysis chart that vibrates.
2. the method for real-time of the concrete vibrating quality according to claim 1 based on laser three-D positioning, special
Sign is: the signal emission module and signal receiving module of the laser detector and laser emitter are wirelessly or non-wirelessly.
3. the method for real-time of the concrete vibrating quality according to claim 2 based on laser three-D positioning, special
Sign is: the laser emitter energy integrated signal receives and emission function, receives the transmitting signal of all laser detectors
Afterwards, it concentrates and is sent to signal processing system.
4. the method for real-time of the concrete vibrating quality according to claim 3 based on laser three-D positioning, special
Sign is: the laser emitter and laser detector signal is visited after host computer is handled, then by being integrated in laser in advance
The signal emission module on device or laser emitter is surveyed, carries out storage or aobvious in real time to be wirelessly or non-wirelessly transferred to monitoring terminal
Show.
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| CN110736788A (en) * | 2019-11-27 | 2020-01-31 | 中国电建集团贵阳勘测设计研究院有限公司 | Intelligent control device and control method for concrete manual vibration fluctuation |
| CN112539822A (en) * | 2020-12-03 | 2021-03-23 | 浙江大学德清先进技术与产业研究院 | Method and device for evaluating vibration frequency and amplitude of building construction site |
| CN113263584B (en) * | 2021-06-07 | 2022-09-30 | 中国建筑第八工程局有限公司 | Intelligent vibrating device and method for concrete prefabricated part |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09217492A (en) * | 1996-02-09 | 1997-08-19 | Fujita Corp | Concrete-placing apparatus |
| JPH09235881A (en) * | 1996-03-04 | 1997-09-09 | Kajima Corp | Concrete leveling laser screen machine with concrete coarse leveling device and construction method for concrete floor |
| WO1998021429A1 (en) * | 1996-11-11 | 1998-05-22 | Otto Heinzle | Device for compacting concrete in a form |
| CN1255640A (en) * | 1998-11-27 | 2000-06-07 | 宫元九 | Method for positioing moving target |
| CN102444289A (en) * | 2011-11-18 | 2012-05-09 | 河海大学 | Concrete pouring and vibrating dynamic visualization monitoring method |
| CN102787839A (en) * | 2012-08-23 | 2012-11-21 | 张景和 | Method for accurately drawing downhole conditions of oil field by acoustic emission located monitoring |
| CN103148824A (en) * | 2013-03-11 | 2013-06-12 | 中国水电顾问集团成都勘测设计研究院 | Intelligent detection method for vibration effective depth |
| CN203113805U (en) * | 2013-03-04 | 2013-08-07 | 中国水电顾问集团成都勘测设计研究院 | Handheld-type concrete vibrator |
| CN103281360A (en) * | 2013-05-15 | 2013-09-04 | 中国水电顾问集团成都勘测设计研究院 | Instant messaging method for concrete vibration quality monitoring data |
| CN103696427A (en) * | 2013-12-26 | 2014-04-02 | 中国水电顾问集团成都勘测设计研究院有限公司 | Real-time manual vibrating bar monitoring and positioning system |
| CN205067726U (en) * | 2015-10-22 | 2016-03-02 | 浙江理工大学 | School bus safety positioning system |
-
2016
- 2016-09-26 CN CN201610850466.XA patent/CN106323170B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09217492A (en) * | 1996-02-09 | 1997-08-19 | Fujita Corp | Concrete-placing apparatus |
| JPH09235881A (en) * | 1996-03-04 | 1997-09-09 | Kajima Corp | Concrete leveling laser screen machine with concrete coarse leveling device and construction method for concrete floor |
| WO1998021429A1 (en) * | 1996-11-11 | 1998-05-22 | Otto Heinzle | Device for compacting concrete in a form |
| CN1255640A (en) * | 1998-11-27 | 2000-06-07 | 宫元九 | Method for positioing moving target |
| CN102444289A (en) * | 2011-11-18 | 2012-05-09 | 河海大学 | Concrete pouring and vibrating dynamic visualization monitoring method |
| CN102787839A (en) * | 2012-08-23 | 2012-11-21 | 张景和 | Method for accurately drawing downhole conditions of oil field by acoustic emission located monitoring |
| CN203113805U (en) * | 2013-03-04 | 2013-08-07 | 中国水电顾问集团成都勘测设计研究院 | Handheld-type concrete vibrator |
| CN103148824A (en) * | 2013-03-11 | 2013-06-12 | 中国水电顾问集团成都勘测设计研究院 | Intelligent detection method for vibration effective depth |
| CN103281360A (en) * | 2013-05-15 | 2013-09-04 | 中国水电顾问集团成都勘测设计研究院 | Instant messaging method for concrete vibration quality monitoring data |
| CN103696427A (en) * | 2013-12-26 | 2014-04-02 | 中国水电顾问集团成都勘测设计研究院有限公司 | Real-time manual vibrating bar monitoring and positioning system |
| CN205067726U (en) * | 2015-10-22 | 2016-03-02 | 浙江理工大学 | School bus safety positioning system |
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