CN207730955U - A kind of Ground Penetrating Radar self-calibrating apparatus and Ground Penetrating Radar self-calibration system - Google Patents
A kind of Ground Penetrating Radar self-calibrating apparatus and Ground Penetrating Radar self-calibration system Download PDFInfo
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- CN207730955U CN207730955U CN201820167610.4U CN201820167610U CN207730955U CN 207730955 U CN207730955 U CN 207730955U CN 201820167610 U CN201820167610 U CN 201820167610U CN 207730955 U CN207730955 U CN 207730955U
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Abstract
The utility model provides a kind of Ground Penetrating Radar self-calibrating apparatus and Ground Penetrating Radar self-calibration system, the Ground Penetrating Radar self-calibrating apparatus include：Radar antenna；Antenna height adjustment frame, the antenna height adjustment frame are placed vertically, and have antenna placement location at the different height of vertical direction, so that radar antenna can be positioned at the different height of antenna height adjustment frame；Metallic plate, the metallic plate are located at antenna height adjustment frame lower part.Ground Penetrating Radar self-calibration system provided by the utility model uses air as calibration medium, using actually measured air velocity of electromagnetic wave as measuring parameter, is relatively calibrated to realize with the aerial spread speed of theoretical electromagnetic wave.The utility model uses vertical observation, and radar antenna shielding action to be measured is maximum, is disturbed small, easily forms clear and legible radar image, high certainty of measurement and reliable and stable.
Description
Technical field
The utility model is related to engineering Inspection Technique field, more particularly to a kind of Ground Penetrating Radar self-calibrating apparatus and Ground Penetrating Radar
Self-calibration system.
Background technology
Radar (Rader) is the abbreviation of Radio Detection and Ranging, means " radio detection and survey
Away from ".Ground Penetrating Radar is with 106-109Hz wave bands are reflected by antenna transmitting electromagnetic wave through objective body with wideband short bursts
After be received by the antenna, and Wave data is handled through processor, required subsurface information is obtained, to the structure of media interior
It makes or method that defect is detected.When carrying out Thickness sensitivity using Ground Penetrating Radar, accuracy of detection is with electromagnetic wave in detection layers
In speed it is directly related, therefore calibrate the important indicator that the velocity of electromagnetic wave measured by it is the instrument.With Ground Penetrating Radar
It is widely used in the fields such as construction engineering test, such as the detection of road surface detection, thickness of tunnel linings, needs to visiting land mine
Confirmed up to precision.
The concerned countries or the technological documents such as professional standard, calibrating standard that still Ground Penetrating Radar is not calibrated at present.It is existing
A kind of Ground Penetrating Radar stability calibration method be using concrete standard test block carry out radar self-correcting, as shown in Figure 1.In Fig. 1,
The thickness of concrete test block is H, and concrete object electromagnetism is surveyed using the signal transmission time and receiving time of high frequency antenna
Velocity of wave angle value, and then calculate the phase between the concrete object velocity of electromagnetic waves angle value and concrete electric magnetic wave velocity standard value of actual measurement
To error amount.But since concrete standard test block is easy to be influenced by air humidity, lead to concrete standard test block dielectric constant
It is unstable, it influences electromagnetic wave and tries spread speed in the block in concrete standard so that calibration result is unreliable.
Utility model content
In order to solve the problems, such as that above-mentioned technical proposal exists, a kind of Ground Penetrating Radar self-calibrating apparatus of the utility model offer and spy
Ground radar self-calibration system.
On the one hand, the utility model provides a kind of Ground Penetrating Radar self-calibrating apparatus, and the Ground Penetrating Radar self-calibrating apparatus includes：
Radar antenna；
Antenna height adjustment frame, the antenna height adjustment frame are placed vertically, and are had at the different height of vertical direction
There is antenna placement location, so that radar antenna can be positioned at the different height of antenna height adjustment frame；
Metallic plate, the metallic plate are located at antenna height adjustment frame lower part.
Preferably, the Ground Penetrating Radar self-calibrating apparatus further includes antenna holder, and the radar antenna is placed on the day
In line holder.
Preferably, the antenna height adjustment frame is Multi-layer bracket.
Preferably, the Multi-layer bracket is no bottom bracket.The distance between described every layer of bracket is advantageously equal.
Preferably, the frame body bottom belt idler wheel or semicircle shape protrusion of the antenna height adjustment frame.
Preferably, the antenna height adjustment frame is the bar with altitude scale, and the bar bottom is equipped with support base, institute
It states bar and is equipped with adjustable for height radar antenna fastener.
Preferably, the Multi-layer bracket number of plies is not less than 5, and the distance between every layer is 0.3m.
Preferably, the antenna holder is bottomless, and antenna holder lower end is horizontally fixed with batten.
Preferably, the metallic plate is ferrimagnet.
On the other hand, it includes the Ground Penetrating Radar self-calibrating apparatus described in above-mentioned any one that the utility model, which also provides a kind of,
Ground Penetrating Radar self-calibration system, the Ground Penetrating Radar self-calibration system further include：
Ground Penetrating Radar instrument is connect with the radar antenna, the electric signal received for receiving radar antenna；And
The processor being connect with Ground Penetrating Radar instrument.
Ground Penetrating Radar self-calibration system provided by the utility model uses air as calibration medium, utilizes actually measured sky
Gas velocity of electromagnetic wave is relatively calibrated to realize as measuring parameter, with the aerial spread speed of theoretical electromagnetic wave.This practicality
Novel to use vertical observation, radar antenna shielding action to be measured is maximum, is disturbed small, easily forms clear and legible radar image,
High certainty of measurement and reliable and stable.In addition, the utility model overcome use at present cement briquette as verification sample expense when, cost
High, the problems such as being influenced by air humidity.
It should be appreciated that aforementioned description substantially and follow-up description in detail are exemplary illustration and explanation, it should not
As the limitation to the claimed content of the utility model.
Description of the drawings
With reference to the attached drawing of accompanying, the more purposes of the utility model, function and advantage will pass through the utility model embodiment party
The described below of formula is illustrated, wherein：
Fig. 1 show the structural schematic diagram of existing Ground Penetrating Radar self-calibration system；
Fig. 2 is the structural schematic diagram of Ground Penetrating Radar self-calibration system in one embodiment of the utility model；
Fig. 3 is the structural schematic diagram of Ground Penetrating Radar self-calibrating apparatus in one embodiment of the utility model；
Fig. 4 is the scheme of installation of ground exploring radar antenna box in one embodiment of the utility model.
Specific implementation mode
By reference to exemplary embodiment, the purpose of this utility model and function and for realizing these purposes and function
Method will be illustrated.However, the utility model is not limited to exemplary embodiment as disclosed below；It can be by not
It is realized with form.The essence of specification is only to aid in various equivalent modifications Integrated Understanding the utility model
Detail.
Hereinafter, the embodiments of the present invention will be described with reference to the drawings.In the accompanying drawings, identical reference numeral represents
Same or similar component or same or like step.
Here, it should also be noted that, in order to avoid having obscured the utility model because of unnecessary details, in the accompanying drawings
The structure and processing step closely related with scheme according to the present utility model are illustrate only, and is omitted and the utility model
The little other details of relationship.
Fig. 2 shows the structure chart of a Ground Penetrating Radar self-calibration system in the utility model, spy land mine provided by the utility model
Include up to self-calibration system：Ground Penetrating Radar self-calibrating apparatus 1, Ground Penetrating Radar instrument 2 and processor 3.Wherein, Ground Penetrating Radar self-calibrating apparatus
1 as shown in Figure 3.Ground Penetrating Radar self-calibrating apparatus 1 include antenna height adjustment frame 11, radar antenna 12, antenna holder 13 and
Metallic plate 14.Radar antenna 12 is contained in antenna holder 13, and antenna holder 13 is placed on antenna height adjustment frame 11.
Antenna height adjustment frame 11 is placed vertically, and has antenna placement location at the different height of vertical direction, so that thunder
It can be positioned over up to antenna at the different height of antenna height adjustment frame.In order to which antenna holder can be allowed to be in different height
So that antenna emits at different height and receives electromagnetic wave to carry out Ground Penetrating Radar stability measurement, antenna height adjustment
Frame 11 preferably has Multi-layer bracket, highly preferable identical between every layer, but can also be different.Multi-layer bracket is preferably nothing
Bottom bracket that is, by peripheral frame to support antenna or antenna holder, or by the fastener in peripheral frame fastens day
Line or antenna holder.The bracket number of plies is preferably 5 layers or more, and but it is not limited to this.In one embodiment of the utility model, day
The distance between line height every layer of bracket of adjustment frame is 0.3m, for example, antenna height adjustment frame uses layered structure, it is preferred to use
L1=30cm, L2=60cm, L3=90cm, L4=120cm, L5=150cm, 5 different heights are calibrated.Here, numerical value
0.3m is merely illustrative, can also be more than or less than 0.3m.
Antenna height adjustment frame 11, can be there are many way of realization for providing different placing heights for radar antenna
And it is not limited to a certain form.In one embodiment of the utility model, antenna height adjustment frame can be implemented as more supporting rods
Support, the Multi-layer article storing frame form that has Multi-layer bracket, or be embodied as at least by two pieces of support side plates supports, be equipped with it is more
The layer multilayer locker of bracket or the form of bookcase.But the utility model is not limited to this, for example, antenna height adjustment frame 11
It can be designed to the Telescopic rack form of foldable stand form or telescopic in height, even, antenna height adjustment frame 11
Can be stock of the design with altitude scale, bottom is equipped with support base, and stock is equipped with the adjustable fastener in position, is used for
Radar antenna 12 is fixed on antenna height adjustment frame 11, and adjustable antenna is at a distance from ground.
Preferably, the frame body bottom belt idler wheel or semicircle shape protrusion of antenna height adjustment frame 11, so as to facilitate can push away
Dynamic antenna height adjustment frame 11.
Radar antenna 12 is fixed in antenna holder 13, and antenna height adjustment frame 11 and 13 edge of antenna holder can be all
With mounting hole or bolt, adjusted in antenna height as shown in figure 4, antenna holder 13 can be arranged by mounting hole or bolt
In the setting height of frame.In the case where dispensing antenna holder 13, radar antenna 12 can also be directly placed at antenna height
On adjustment frame 11.
In one embodiment of the utility model, antenna holder 13 does not have bottom, but is fixed with batten in box lower end, passes through
Radar antenna 12 is fixed in antenna holder 13 by batten, to avoid influencing the transmitting of radar antenna 12 as possible and receive electromagnetism
Wave.
Metallic plate 14 is arranged in the bottom of antenna height adjustment frame 11, reflection electromagnetic wave signal is used for, so that antenna
Receive stronger reflection electromagnetic wave signal.
In embodiments of the present invention, to the shape of metallic plate 14, there is no limit.Preferably round metallic plate, as thickness is
3cm, the circular metal plate of a diameter of 0.7m can select it here, numerical value 3cm and 0.7m is merely illustrative according to global design
Its rational numerical value.In order to obtain stronger reflection signal, metallic plate 14 is preferably ferrimagnet.
The principle of Ground Penetrating Radar self-calibration system provided by the utility model is：Ground exploring radar antenna is placed on antenna height tune
On whole frame, radar antenna 12 can emit electromagnetic wave in the different height of antenna height adjustment frame 11, and electromagnetic wave passes through air
Layer reaches 14 surface of metallic plate, and radar antenna 12 is returned after the reflection of metallic plate 14, and Ground Penetrating Radar instrument 2 connects with radar antenna 2
Connect, for 12 received signal of radar antenna to be converted to electric signal, and electric signal is amplified and analog/digital conversion processing,
Obtain the radar waveform data that processor 3 can identify.Processor 3 connects Ground Penetrating Radar instrument 2, for being obtained to Ground Penetrating Radar instrument
Radar waveform data carry out data processing, the data such as when obtaining radar double-pass reflection.Processor 3 is by calculating radar antenna
It is opposite between the 12 aerial spread speeds of electromagnetic wave being actually sent out and the aerial spread speed of theoretical electromagnetic wave
Error amount, to be calibrated to Ground Penetrating Radar.
The utility model is as follows using the self correcting procedure that Ground Penetrating Radar self-calibration system carries out：
Step S1 selects the place of a smooth spaciousness, and metallic plate is horizontal positioned on the ground, draws one and passes through metal
The survey line at plate center, survey line length are preferably more than 5m, and a label is set per 0.5m along survey line.
Radar antenna 12 is fixed in antenna holder 13 by step S2, and by antenna holder 13 with bolt or other
Mode is fixed on antenna height adjustment frame 11 at L1 height, and antenna height adjustment frame 11 keeps placing vertically, records thunder at this time
Up to day line-spacing ground level L.
Ground Penetrating Radar is connected by step S3 with ground exploring radar antenna 12；The acquisition parameter of Ground Penetrating Radar is set：Such as setting
Dielectric constant is set as 1.
Step S4, by antenna height adjustment frame 11 from one end of the separate metallic plate 14 of survey line to close to the one of metallic plate 14
End is slowly mobile, and remains that antenna height adjustment frame 11 is perpendicular to the ground.The mode continuously measured can be used by visiting in period
Ground radar instrument 2 acquires signal.
Step S5, ground exploring radar antenna emit electromagnetism on a certain height L (such as L=L1) position of antenna height adjustment frame
Wave, when being moved on metallic plate, the back wave of ground exploring radar antenna transmitting is amplified to maximum reception by radar instrument；It can stop at this time
Only portable antenna height adjustment frame 11 may be selected to handle Wave data with processor 3, obtain the original of L level air layers
Begin the radar waveform figure recorded.
Step S6, the round trip for reading radar reflection last indicating value t.
Step S7 calculates the aerial spread speed v of electromagnetic wave measured using following formula：
Step S8 calculates the aerial spread speed of the electromagnetic wave measured and the aerial propagation speed of theoretical electromagnetic wave
Spend v0Between relative error magnitudes：
The height L of radar antenna 12 is adjusted separately from L1 as L2~L5, is repeated the above steps by step S9, each height
Measure it is primary and calculate the aerial spread speed of electromagnetic wave and the aerial spread speed of theoretical electromagnetic wave that measure it
Between relative error magnitudes, then calculate the average value of each relative error magnitudes：
In formula, n is pendulous frequency, viThe aerial spread speed of electromagnetic wave measured for ith.
For example, taking Coverage factor k=2, then the expanded uncertainty of the Ground Penetrating Radar measured is：
Urel=kUp (4)
Then calibration evaluation can be carried out to Ground Penetrating Radar according to the expanded uncertainty of the Ground Penetrating Radar measured.Due to measuring
The rudimentary algorithm of expanded uncertainty and Ground Penetrating Radar is calibrated according to the expanded uncertainty of the Ground Penetrating Radar measured
It is not belonging to the improvement of the utility model, therefore does not do and repeats in further detail.
Ground Penetrating Radar self-calibration system provided by the utility model uses air as calibration medium, utilizes actually measured sky
Gas velocity of electromagnetic wave is relatively calibrated to realize as measuring parameter, with the aerial spread speed of theoretical electromagnetic wave, due to sky
Velocity of electromagnetic waves is stablized in gas, close to theoretical value, it can be achieved that the magnitude tracing of Ground Penetrating Radar to be checked.In addition the utility model is using vertical
To observation, radar antenna shielding action to be measured is maximum, is disturbed small, easily forms clear and legible radar image, high certainty of measurement
And it is reliable and stable.In addition, the utility model overcome use at present cement briquette as verification sample expense when, it is of high cost, by air
Humidity influences the problems such as big.
Ground Penetrating Radar self-calibration system provided by the utility model uses vertical observed pattern, realizes a variety of different heights, full
Foot different accuracy requirement, methodological science is reliable.
The Ground Penetrating Radar self-calibrating apparatus and system of the utility model be studied to solve Ground Penetrating Radar self-correcting, setting of designing
It is standby.The utility model overcomes the problems such as time-consuming, of high cost when using cement briquette at present as verification sample, can be accurate, fast
Radar is calibrated fastly.The Ground Penetrating Radar self-calibrating apparatus of the utility model can adapt to GSS companies of the domestic common U.S. at present
The self-correctings such as SIR-20 types and Qingdao electric wave institute LTD radars.
Explanation in conjunction with the utility model disclosed here and practice, the other embodiment of the utility model is for this field
Technical staff will be readily apparent and understand.Illustrate and embodiment be regarded only as being exemplary, the utility model it is real
Scope and spirit are defined in the claims.
Claims (10)
1. a kind of Ground Penetrating Radar self-calibrating apparatus, which is characterized in that the Ground Penetrating Radar self-calibrating apparatus includes：
Radar antenna；
Antenna height adjustment frame, the antenna height adjustment frame are placed vertically, and have day at the different height of vertical direction
Line placement location, so that radar antenna can be positioned at the different height of antenna height adjustment frame；
Metallic plate, the metallic plate are located at antenna height adjustment frame lower part.
2. Ground Penetrating Radar self-calibrating apparatus according to claim 1, which is characterized in that the Ground Penetrating Radar self-calibrating apparatus also wraps
Antenna holder is included, the radar antenna is placed in the antenna holder.
3. Ground Penetrating Radar self-calibrating apparatus according to claim 1 or 2, which is characterized in that the antenna height adjustment frame is
Multi-layer bracket.
4. Ground Penetrating Radar self-calibrating apparatus according to claim 3, which is characterized in that each layer of the Multi-layer bracket is nothing
Bottom bracket.
5. Ground Penetrating Radar self-calibrating apparatus according to claim 3, which is characterized in that the frame body bottom belt of the Multi-layer bracket
Idler wheel or semicircle shape protrusion.
6. Ground Penetrating Radar self-calibrating apparatus according to claim 1 or 2, which is characterized in that the antenna height adjustment frame is
Bar with altitude scale, the bar bottom are equipped with support base, and the bar is equipped with adjustable for height radar antenna fastener.
7. Ground Penetrating Radar self-calibrating apparatus according to claim 2, which is characterized in that the antenna holder is bottomless, and institute
It states antenna holder lower end and is horizontally fixed with batten.
8. Ground Penetrating Radar self-calibrating apparatus according to claim 1 or 2, which is characterized in that the metallic plate is circular metal
Plate.
9. Ground Penetrating Radar self-calibrating apparatus according to claim 1 or 2, which is characterized in that the metallic plate is ferromagnetism material
Material.
10. a kind of Ground Penetrating Radar self-correcting system including the Ground Penetrating Radar self-calibrating apparatus as described in any one of claim 1-9
System, which is characterized in that the Ground Penetrating Radar self-calibration system further includes：
Ground Penetrating Radar instrument is connect with the radar antenna, the electric signal received for receiving radar antenna；And
The processor being connect with Ground Penetrating Radar instrument.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114488045A (en) * | 2022-01-18 | 2022-05-13 | 中国铁道科学研究院集团有限公司 | Calibration method and calibration device for road bed dirt detection data and test equipment |
-
2018
- 2018-01-31 CN CN201820167610.4U patent/CN207730955U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114488045A (en) * | 2022-01-18 | 2022-05-13 | 中国铁道科学研究院集团有限公司 | Calibration method and calibration device for road bed dirt detection data and test equipment |
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