CN108169749A - Utilize the method for reinforcing bar in millimeter wave detection wall - Google Patents
Utilize the method for reinforcing bar in millimeter wave detection wall Download PDFInfo
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- CN108169749A CN108169749A CN201711365469.5A CN201711365469A CN108169749A CN 108169749 A CN108169749 A CN 108169749A CN 201711365469 A CN201711365469 A CN 201711365469A CN 108169749 A CN108169749 A CN 108169749A
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- Prior art keywords
- millimeter wave
- wall
- reinforcing bar
- detection instrument
- orientation
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Classifications
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- 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
- G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
- G01S13/88—Radar or analogous systems specially adapted for specific applications
- G01S13/887—Radar or analogous systems specially adapted for specific applications for detection of concealed objects, e.g. contraband or weapons
- G01S13/888—Radar or analogous systems specially adapted for specific applications for detection of concealed objects, e.g. contraband or weapons through wall detection
-
- 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
- G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
- G01S13/88—Radar or analogous systems specially adapted for specific applications
- G01S13/89—Radar or analogous systems specially adapted for specific applications for mapping or imaging
- G01S13/90—Radar or analogous systems specially adapted for specific applications for mapping or imaging using synthetic aperture techniques, e.g. synthetic aperture radar [SAR] techniques
-
- 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
- G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
- G01S13/88—Radar or analogous systems specially adapted for specific applications
- G01S13/89—Radar or analogous systems specially adapted for specific applications for mapping or imaging
- G01S13/90—Radar or analogous systems specially adapted for specific applications for mapping or imaging using synthetic aperture techniques, e.g. synthetic aperture radar [SAR] techniques
- G01S13/9021—SAR image post-processing techniques
- G01S13/9027—Pattern recognition for feature extraction
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- Engineering & Computer Science (AREA)
- Remote Sensing (AREA)
- Radar, Positioning & Navigation (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Computer Networks & Wireless Communication (AREA)
- General Physics & Mathematics (AREA)
- Artificial Intelligence (AREA)
- Computer Vision & Pattern Recognition (AREA)
- Radar Systems Or Details Thereof (AREA)
Abstract
The present invention relates to a kind of methods using reinforcing bar in millimeter wave detection wall, in the fixed range plane for being parallel to metope, millimeter wave reinforced bar detection instrument is along level orientation to moving a segment length, sampling instant in each horizontal position, transceiver module is by continuous millimeter wave directional illumination on tested wall；Millimeter wave passes through tested wall, and the echo-signal after being reflected using reinforcing bar is synchronized by transceiver module to be received, and Low Medium Frequency is gone to after simulated frequency conversion and carries out subsequent data acquisition；Processing is reconstructed according to all orientation sample datas of acquisition in data processing module, carries out one-dimensional or Two-Dimensional Reconstruction image to target, reinforcement location in wall is determined in a manner of imaging.Not only Measurement Resolution is high for this mode, and measuring speed is fast, small, portable using single transmitting-receiving array element system bulk, cost is controllable, the length of orientation synthetic aperture can be adjusted according to true resolution demand simultaneously, and so as to adapt to the demand of different Measurement Resolutions, application flexibility is big.
Description
Technical field
It is more particularly to a kind of to utilize reinforcing bar in millimeter wave detection wall the present invention relates to reinforcing bar detection method in a kind of wall
Method.
Background technology
As building trade is grown rapidly, also grow in construction and stolen while project progress is pursued in architectural engineering
Work material reducing, the problem of performing a task perfunctorily.So as to cause, the diameter of reinforcing bar is unsatisfactory for construction reference or the distribution of reinforcing bar is not met
Situations such as construction requirement, occurs.These situations all can form serious threat to social property and personal safety.Therefore, it is building
Building needs to be detected the reinforcing bar in wall in quality monitoring.
The detection of reinforcing bar mainly carries out reinforcing bar detection using reinforced bar detection instrument in building at present.Application is more wide at present
General is to utilize the strong and weak Handheld reinforcing steel bar detector for obtaining reinforcing bar information of low frequency X-band microwave signal reflection.When measuring reinforcing bar,
Uniform speed scanning is tested building masonry wall, and the change in signal strength situation that receives according to reinforced bar detection instrument judges reinforcing bar substantially
Position of orientation.This detector although portable, test result precision is low, resolution ratio is poor, without it is visual, measuring speed is slow,
And can not flexible adaptation difference measure scene demand.
Invention content
The present invention be directed to existing reinforcing bar survey meter Measurement Resolution is poor, measuring speed is relatively slow and can not flexible adaptation
A kind of the problem of various measurement scenes, it is proposed that the side of reinforcing bar in millimeter wave detection wall based on synthetic aperture imaging principle
Method, used by this method millimetre wavelength just fall market minimum bar diameter magnitude, be highly suitable for diameter not
Reinforcing bar imaging detection in wall less than 6mm.
The technical scheme is that：A kind of method using reinforcing bar in millimeter wave detection wall, using millimeter wave reinforcing bar
Based on synthetic aperture radar image-forming principle, steel in wall is realized using the through characteristic and high resolution of millimeter wave for detector
The detection of muscle, specifically comprises the following steps：
1) in the fixed range plane for being parallel to metope, millimeter wave reinforced bar detection instrument is along level orientation to moving one
Segment length, the sampling instant in each horizontal position, the transceiver module in millimeter wave reinforced bar detection instrument determine continuous millimeter wave
To being radiated on tested wall；
2) millimeter wave passes through tested wall, the echo-signal after being reflected using reinforcing bar by millimeter wave reinforced bar detection instrument receipts
Hair machine module synchronization receives, and Low Medium Frequency is gone to after simulation, frequency conversion and carries out subsequent data acquisition；
3) after millimeter wave reinforced bar detection instrument completes the orientation movement of certain length, the data in millimeter wave reinforced bar detection instrument
Processing is reconstructed according to all orientation sample datas of acquisition in processing module, and one-dimensional or Two-Dimensional Reconstruction figure is carried out to target
Picture；
4) according to the one-dimensional or Two-Dimensional Reconstruction image of acquisition, reinforcement location in wall is determined in a manner of imaging.
The data processing module uses range migration algorithm (RMA), and echo-signal first is transformed into wave-number domain and is counted
It calculates, carries out Stolt interpolation calculations later and obtain uniform scattering data, then carry out two dimensional inverse fourier transform.
A fixed length of synthetic aperture is provided by moving horizontally track inside the millimeter wave reinforced bar detection instrument, to carry
For the primary resolution capability of acquiescence；Practical length of synthetic aperture can be expanded by the overall movement of millimeter wave reinforced bar detection instrument
The fine resolution ability so as to improve orientation is opened up, i.e. orientation length of synthetic aperture can be carried out according to true resolution demand
Adjustment so as to improve azimuth dimension imaging resolution, adapts to the occasion of different resolution demand.
The beneficial effects of the present invention are：Not only Measurement Resolution is high for the characteristics of present invention utilizes millimetre wavelength short, surveys
It is fast to measure speed, array element system bulk is small, cost is controllable, while the length of orientation synthetic aperture being capable of basis using single transmitting-receiving
True resolution demand is adjusted, and so as to adapt to different reinforcing bar measurement demands, application flexibility is big.
Description of the drawings
Fig. 1 is the millimeter wave reinforced bar detection instrument operative scenario figure of the present invention；
Fig. 2 is the millimeter wave reinforced bar detection instrument data processing module schematic diagram of the present invention；
Fig. 3 is the millimeter wave reinforced bar detection instrument transceiver module functional block diagram of the present invention；
Fig. 4 is the millimeter wave reinforced bar detection instrument imaging algorithm flow chart of the present invention；
Fig. 5 is the millimeter wave reinforced bar detection instrument outline drawing of the present invention；
Fig. 6 is the millimeter wave reinforced bar detection instrument synthetic aperture extended scene figure of the present invention；
The millimeter wave reinforced bar detection instrument synthetic aperture that Fig. 7 is the present invention extends schematic diagram.
Specific embodiment
The invention will be further described with embodiment below in conjunction with the accompanying drawings.
Millimeter wave is to building；Class non-metal solid (such as cement, brick, lime) has stronger penetrability, utilizes wave
Length and the characteristic to metal near total reflection (reflectivity is more than 99%), can be realized by way of one-dimensional or two-dimensional imaging
It crosses architectural entity and determines and detect reinforcement location.
Such as Fig. 1, shown in 2,3,5, millimeter wave reinforced bar detection instrument is by transceiver module 1, antenna 2, built-in synthetic aperture track
3rd, display 6, control panel 7, data processing module 8 form, and wherein data processing module 8 includes data acquisition, motor control
Unit, electric machine controller, memory, digital signal processing unit composition.
As shown in Figure 1, ensure that 2 axis of antenna is parallel to tested metope, and each is adopted when gathered data as possible
Interval between sample position needs to meet nyquist sampling theorem, ensures image quality.
The basic functional principle of millimeter wave reinforced bar detection instrument can be obtained according to Fig. 1,2,3：
In a certain fixed range plane for being parallel to metope, the transceiver module of millimeter wave reinforced bar detection instrument is in built-in water
Flat 3 upper edge of tracks level orientation to moving a segment length, the sampling instant in each horizontal position, transceiver module 1
By continuous millimeter wave directional illumination on tested wall 5, millimeter wave passes through tested wall 5, the echo after being reflected using reinforcing bar 4
Signal synchronizes reception by transceiver module 1, and Low Medium Frequency is gone to after simulation, frequency conversion and carries out subsequent data acquisition.It completes certain
After the orientation movement of length, processing is reconstructed according to all orientation sample datas of acquisition in data processing module, to mesh
Mark carries out one-dimensional or Two-Dimensional Reconstruction image.Finally, according to the reconstructed image of acquisition, reinforcing bar 4 in wall are determined in a manner of imaging
Position is simultaneously shown on the display 6.
As shown in figure 4, the imaging algorithm flow chart using reinforcing bar method in millimeter wave detection wall.Mainly using away from
From migration algorithm (RMA), echo-signal is first transformed into wave-number domain and is calculated, carry out Stolt interpolation calculations later to obtain
Then uniform scattering data carries out two dimensional inverse fourier transform.The range migration algorithm of use can effectively reduce due into
The influence of image field scape size or radar pitch angle to imaging results focusing power, it is near so as to be not added with other based on scatter times
Being fully focused without geometric deformation is realized like condition.
Such as Fig. 6, shown in Fig. 7, the present invention can extend the length of synthetic aperture according to actual demand and then improve azimuth dimension
Imaging resolution.Azimuth dimension resolution estimation is
Wherein λ represents the wavelength of center frequency point；θb=min { θspan,θantennaRepresent wave-number domain expanded angle；
θantennaRepresent antenna directional angle；
Represent expanded angle determined by target bearing to distance and detector orientation, wherein
M is integer,Expression rounds up)
It represents to form total length of synthetic aperture by mobile millimeter wave reinforced bar detection instrument, the reinforcing bar that d represents invented is visited
The length of synthetic aperture that built-in tracks 3 provide in instrument is surveyed, that is, gives tacit consent to aperture length, R is represented between plane of vision and objective plane
Distance.
It is moved integrally by millimeter wave reinforced bar detection instrument, sees Fig. 6 and Fig. 7, position is measured to M measurements position from first time
It puts, and the gathered data in M movement, the length of synthetic aperture of bigger can be obtained in this way, and then improve azimuth dimension resolution ratio.
Not only Measurement Resolution is high for this mode, and measuring speed is fast, using single transmitting-receiving array element system bulk is small, cost is controllable, simultaneously
The length of orientation synthetic aperture can be adjusted according to true resolution demand, so as to adapt to different measurement demands, application
Flexibility is big.
Claims (3)
1. a kind of method using reinforcing bar in millimeter wave detection wall, using millimeter wave reinforced bar detection instrument, based on synthetic aperture thunder
Up to image-forming principle, the detection of reinforcing bar in wall is realized using the through characteristic and high resolution of millimeter wave, which is characterized in that tool
Body includes the following steps：
1）In the fixed range plane for being parallel to metope, millimeter wave reinforced bar detection instrument is long to moving one section along level orientation
It spends, the sampling instant in each horizontal position, the transceiver module in millimeter wave reinforced bar detection instrument, which orients continuous millimeter wave, to be shone
It penetrates on tested wall；
2）Millimeter wave passes through tested wall, the echo-signal after being reflected using reinforcing bar by millimeter wave reinforced bar detection instrument transceiver
Module synchronization receives, and Low Medium Frequency is gone to after simulation, frequency conversion and carries out subsequent data acquisition；
3）After millimeter wave reinforced bar detection instrument completes the orientation movement of certain length, the data processing in millimeter wave reinforced bar detection instrument
Processing is reconstructed in all orientation sample datas that module collection collects, and one-dimensional or Two-Dimensional Reconstruction figure is carried out to target
Picture；
4）According to the one-dimensional or Two-Dimensional Reconstruction image of acquisition, reinforcement location in wall is determined in a manner of imaging.
2. the method according to claim 1 using reinforcing bar in millimeter wave detection wall, it is characterised in that：At the data
Module is managed using range migration algorithm, echo-signal is first transformed into wave-number domain and is calculated, carries out Stolt interpolation calculations later
Uniform scattering data is obtained, then carries out two dimensional inverse fourier transform.
3. the method according to claim 1 using reinforcing bar in millimeter wave detection wall, it is characterised in that：The millimeter wave
A fixed length of synthetic aperture is provided by moving horizontally track inside reinforced bar detection instrument, energy is differentiated to provide the primary of acquiescence
Power；Practical length of synthetic aperture can be extended to improve orientation by the overall movement of millimeter wave reinforced bar detection instrument
Fine resolution ability, i.e. orientation length of synthetic aperture can be adjusted according to true resolution demand, so as to improve orientation
Imaging resolution is tieed up, adapts to the occasion of different resolution demand.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711365469.5A CN108169749A (en) | 2017-12-18 | 2017-12-18 | Utilize the method for reinforcing bar in millimeter wave detection wall |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711365469.5A CN108169749A (en) | 2017-12-18 | 2017-12-18 | Utilize the method for reinforcing bar in millimeter wave detection wall |
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| CN108169749A true CN108169749A (en) | 2018-06-15 |
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| CN201711365469.5A Pending CN108169749A (en) | 2017-12-18 | 2017-12-18 | Utilize the method for reinforcing bar in millimeter wave detection wall |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109856630A (en) * | 2019-02-15 | 2019-06-07 | 济南爱我本克网络科技有限公司 | A kind of portable partition scan fluoroscopic apparatus |
| CN116819529A (en) * | 2023-07-13 | 2023-09-29 | 中建深圳装饰有限公司 | Stone curtain wall metal structure perspective imaging method and device based on millimeter waves |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109856630A (en) * | 2019-02-15 | 2019-06-07 | 济南爱我本克网络科技有限公司 | A kind of portable partition scan fluoroscopic apparatus |
| CN116819529A (en) * | 2023-07-13 | 2023-09-29 | 中建深圳装饰有限公司 | Stone curtain wall metal structure perspective imaging method and device based on millimeter waves |
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Application publication date: 20180615 |
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