WO2010151125A1 - Radar pénétrant gpr amélioré - Google Patents
Radar pénétrant gpr amélioré Download PDFInfo
- Publication number
- WO2010151125A1 WO2010151125A1 PCT/NL2010/050388 NL2010050388W WO2010151125A1 WO 2010151125 A1 WO2010151125 A1 WO 2010151125A1 NL 2010050388 W NL2010050388 W NL 2010050388W WO 2010151125 A1 WO2010151125 A1 WO 2010151125A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- gpr
- electrodes
- ground
- electrode
- electromagnetic shielding
- Prior art date
Links
Classifications
-
- 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
- G01S13/885—Radar or analogous systems specially adapted for specific applications for ground probing
-
- 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
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
- G01S7/03—Details of HF subsystems specially adapted therefor, e.g. common to transmitter and receiver
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
- H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
- H01Q21/06—Arrays of individually energised antenna units similarly polarised and spaced apart
- H01Q21/061—Two dimensional planar arrays
- H01Q21/062—Two dimensional planar arrays using dipole aerials
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
- H01Q9/04—Resonant antennas
- H01Q9/16—Resonant antennas with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole
- H01Q9/28—Conical, cylindrical, cage, strip, gauze, or like elements having an extended radiating surface; Elements comprising two conical surfaces having collinear axes and adjacent apices and fed by two-conductor transmission lines
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
- H01Q9/04—Resonant antennas
- H01Q9/16—Resonant antennas with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole
- H01Q9/28—Conical, cylindrical, cage, strip, gauze, or like elements having an extended radiating surface; Elements comprising two conical surfaces having collinear axes and adjacent apices and fed by two-conductor transmission lines
- H01Q9/285—Planar dipole
Definitions
- the invention relates to an improved ground penetrating radar (GPR) .
- GPR ground penetrating radars
- Ground penetrating radars have been used successfully in the past for finding underground discontinuities.
- archeological sites have been investigated without excavating the site or otherwise damaging underground structures, construction sites have been checked for underground anomalies that might interfere with construction, and utility companies have pinpointed underground pipes and cables for which the locations were inaccurate or unknown.
- US patent 3,831,173 discloses a ground radar system for locating underground objects, such as pipes, utility lines, culverts, ledges and like kinds of underground discontinuities, including voids to depths in excess of 10 feet (ca. 3.05 m) , the system including a basic radar having a special antenna design which launches radiation that penetrates the earth and receives reflections from underground discontinuities for recordation in a moving vehicle.
- the present invention provides a ground penetrating radar (GPR) having a base plane for facing the ground when in use, said GPR comprising a transmit antenna for transmitting a signal into the ground, a receive antenna for receiving a reflected signal from the ground, and an electromagnetic shielding, the transmit and/or receive antenna being located substantially between the base plane and the electromagnetic shielding, wherein the GPR further comprises an electrode conductively connected or connectable with the electromagnetic shielding and having a tip arranged for extending to and/or past said base plane for conductively contacting the ground when in use.
- GPR ground penetrating radar
- the GPR comprises one or more additional electrodes conductively connectable with the electromagnetic shielding and having a tip arranged for extending to and/or past the base plane for conductively contacting the ground when in use.
- the electrode tips are arranged substantially symmetrically around the transmit and/or receive antenna.
- the GPR has a preferred direction of movement during use, and, at least during contact with the ground, the electrode tips are arranged substantially next to the transmit antenna without contacting the antenna, wherein an intersecting line through the electrode tips is substantially perpendicular to the preferred direction of movement .
- the electromagnetic shielding is arranged between the one or more electrode tips and the transmit and/or receive antenna.
- the one or more of the electrode tips are arranged outside the transmit range of the transmit antenna.
- the transmit range of the transmit antenna may be dependent on the shape of the antenna and/or of the electromagnetic shielding.
- the electrodes substantially do not interfere with the transmitted signal.
- one or more of the electrode tips are arranged within the transmit range of the transmit antenna.
- the electrodes can be placed under or next to the antennas, allowing a more compact GPR to be constructed.
- one or more resistors conductively connect the transmitting and/or receiving antenna with the shielding.
- the resistors may aid in reducing oscillation of the transmitted pulse within the ground radar. Additionally the antennas of this embodiment may thus function as broadband antennas.
- the electrode or electrodes are spring-mounted on the GPR. The springs aid in maintaining contact between the electrode tips and the ground, especially when the GPR is dragged across the ground.
- the electromagnetic shielding is substantially covered with a non-conductive material. For example, the entire surface of the shielding that faces away from the antennas may be covered with a non conductive material. This may protect operators from electrical shock and further isolate the GPR from external influences.
- the GPR further comprises a non- conductive contact surface for contacting the ground and forming an outer surface of the GPR.
- This surface preferably comprises a wear-resistant and substantially non-static material.
- the contacting surface comprises a material which provides for a low friction when dragged along the ground.
- the contact surface comprises a non-conducting sheet material, preferably a synthetic or plastic material.
- the sheet material is removable connected to the GRP, and can be replaced by a new sheet when worn.
- non-conductive outer surface covers substantially all of the GPR, except for the electrode tips.
- the GPR further comprises potential difference measuring means conductively connectable to selected electrodes of the two or more electrodes and configured for measuring a potential difference there between, and selection means adapted for establishing and or breaking conductive connections between individual electrodes of the two or more electrodes with the potential difference measuring means and/or the electromagnetic shielding.
- a GPR of this embodiment may be used to measure potential differences in the soil between the electrodes, when at least one of the electrodes is not conductively connected to the shielding. It has been found that the potential differences between two electrodes may also provide information about subsurface discontinuities as disclosed in an earlier patent application NL2002124 by the applicant.
- the electrodes of the GPR of this embodiment can be switched to a first configuration wherein they provide grounding to the electromagnetic shielding for use with the radar, or to a second configuration wherein the electrodes are conductively connected to potential difference measuring means for measuring a potential difference between the electrodes .
- the GPR comprises potential difference measuring means conductively connected said two or more electrodes, for measuring a potential difference between two of said electrodes when at least one of these two electrodes is not conductively connected to the electromagnetic shielding.
- changes in the measured potential differences can be used to detect subsurface discontinuities, such as contours of electrical cables, in an alternative manner without the use of the radar.
- the information obtained by measuring potential differences and obtained by radar can be complementary.
- the present invention provides a method for detecting underground structures using a GPR according to the invention wherein the one or more electrodes are conductively connected to the electromagnetic shielding, said method comprising the steps of: placing the one or more electrodes in conductive contact with the ground, moving the GPR across the ground while maintaining contact between the electrode and the ground, transmitting a signal into the ground using the transmit antenna and receiving reflected signals.
- the present invention provides a method for detecting underground structures using a GPR according to the invention having potential difference measuring means conductively connected to said electrodes, said method comprising the steps of: placing the two or more electrodes in conductive contact with the ground, moving the GPR across the ground while maintaining contact between the electrodes and the ground, selecting one of the two or more electrodes as a measuring electrode and selecting at least one of the other electrodes of said two or more electrodes as a reference electrode, measuring a potential difference between the measuring electrode and the reference electrode.
- This method may be used to determine differences in potential in the soil that might indicate underground discontinuities.
- the transmit antenna is operated to transmit a signal having characteristics dependent on a potential difference measured between the two or more electrodes. For instance, the frequency of the signal transmitted by the transmit antenna may be adapted based on the potential differences measured between the electrodes.
- the selection means are operated to establish or break contact between electrodes and the shielding and/or potential difference measuring means dependent on a reflected signal received by the receive antenna.
- the configuration of the measuring and reference electrodes is dependent on the signal received by the receive antenna.
- Figures IA and IB show a schematic bottom view and a schematic side view respectively of an embodiment of a GPR according to the invention
- figure 2 shows a schematic perspective bottom view of an embodiment of a GPR according to the invention with the bottom plate removed
- 3 shows the GPR of figure 2, with the bottom plate attached
- figure 4 shows a detail of a spring mounted electrode as may be used in a GPR according to the invention
- figure 5 shows a schematic view of a second embodiment of the GPR according to the invention.
- FIG. IA A schematic bottom view of a ground penetrating radar 100 according to the invention from which the bottom plate has been removed is shown in figure IA. It comprises a transmit antenna 102a, 102b and a receive antenna 103a, 103b adapted for transmitting a signal and receiving reflections of that signal respectively.
- the antennas are arranged transverse to direction D in which the GPR may typically be dragged during use.
- the GPR may be dragged behind a motorized vehicle such as a quad, tractor and the like or may be manually moved across an area of interest.
- differing reflective properties of underground discontinuities for the signal emitted by the transmit antenna result in differing signals received at the receive antenna. Information about underground structures may be inferred from the received signals.
- Electromagnetic shielding 101 is provided at least at the side of the antennas 102,103 facing away from a base plane which in use faces the ground surface. In use, the antennas and their electromagnetic shielding are arranged at a distance from the ground. This shielding may shield the receive antenna 103a, 103b from external electromagnetic radiation, and may also direct the signal emitted from transmit antenna 102a, 102b in the desired direction, in particular into the ground.
- the antennas may be connected to the shielding through resistors (not shown) as is known in the art, for instance for making the antennas broadband.
- Two electrodes 105a, 105b having associated electrode tips 106a, 106b are provided at the sides of the GPR, and are arranged for conductive contact with the electromagnetic shielding 101. In the embodiment shown the two electrodes are directly conductively connected with the shielding at mount points 104a, 104b.
- the GPR has a base plate 108 facing a ground surface 120 and, in this case, substantially contacting and supported by the ground surface.
- the base plate 108 is made from a non-conductive, wear-resistant material, such as Nylon 6,6.
- a substantially circumferential edge can be used as support element of the GPR when placed on the ground.
- Said base plate 108 or circumferential edge defines a base plane of the GPR.
- the GPR is shown facing a ground surface it will be obvious to a person skilled in the art that the GPR of the invention may used facing walls, ceilings etc., as long as the base plane faces the volume that is to be investigated.
- the electrode tips 106a, 106b are arranged substantially symmetrically around the transmit antenna 102a, 102b, preferably substantially symmetrically around the transverse axis 110 which goes through the transmit antenna.
- the spring coil 107a and electrode 105a are adapted for pushing the electrode tip 106a towards and/or slightly past the base plane 108 to ensure substantially continuous contact with the ground when the GPR is dragged in direction D.
- the angle ⁇ between the electrode 105a and the ground 120 is preferably a sharp angle, opening in the direction D. This allows the electrode some freedom of movement when it is dragged in direction D, while preventing the electrode from digging into the ground.
- FIG. 2 shows a schematic perspective bottom view of a GRP according to the invention, from which the bottom plate has been removed.
- Electrode 105a is spring mounted to the GPR at mount point 104a, in this case by enclosing the spring coiled end of the electrode in a substantially enclosing holder. The spring coiled end is thus kept conductively connected to the shielding 101.
- the tip of the electrode 105a is arranged substantially in the base plane of the and symmetrical around the transverse axis of the transmit antenna 102a, 102b.
- Transmit antenna 102a, 102b is connected to transmission lines 141a, 141b which are adapted to supply a signal to be transmitted.
- the transmit antenna is spaced apart from the electromagnetic shielding 101 by spacers 130 and 140, comprising for instance non-conductive foam.
- the transmit antenna 102a, 102b is connected through resistors 142a, 143a and 142b, 143b respectively to the electromagnetic shielding 101.
- the receive antenna 103a, 103b is connected through resistors 132a, 133a and 132b, 133b respectively to the electromagnetic shielding.
- the GPR further comprises a side surface 150 on the outer side of which mount points 104a, 104b are provided for the electrodes 105a, 105b respectively.
- the side surface is made from a non conductive material, to prevent direct electrical contact between the ground and the antennas.
- the side surface 150 is may be comprise an electrically conductive material, essentially extending the electromagnetic shielding and aiding in shielding the antennas from external radiation.
- a non-conductive bottom plate 108 as shown in figure 3 may prevent direct electrical contact between the antennas and the ground.
- the non-conductive bottom plate preferably comprises a non-static material, preferably wear- resistant as well, to prevent static build up from interfering with the signals, and to protect the GPR from damage.
- a typical GPR construction would comprise, from bottom to top, a layer of non-conductive, non-static material such as plastic, a layer of air, another layer of the non-conductive, non-static material, a circuit board comprising both antennas, another layer of air, the electromagnetic shielding and finally another layer of the non-conductive, non-static material. Additionally the layers comprising air may also be partly filled with a non conductive foam for absorbing shocks. Though the GPR will typically be used outside watery environments, it may further comprise extra weight to allow it to sink to the bottom of for instance a water filled trench. When the outside of the GPR is substantially covered with a non- conductive material, except of course for the electrode tips, it is less likely to act as a battery when submerged in water, reducing signal corruption.
- FIG 4 shows a detail of a mounted electrode 105a as may be used in the invention.
- the spring-coiled end 107a of the electrode 105a is enclosed in a restraining structure 104a which allows some deformation of the coil and thus some freedom of movement of the electrode tip in a vertical direction.
- the electrodes may be easily replaced, without the need for special tools, as might be desired when surveying different kinds of soil or when electrodes are worn out.
- Figure 5 shows an embodiment of a GPR comprising potential difference measuring means 211 adapted for measuring a potential difference between electrodes 205a and 205b.
- the electrodes are connectable to the potential difference measuring means 211 or the electromagnetic shielding 201.
- the electrodes are isolated from the electromagnetic shielding by isolators 207a, 207b.
- the electrodes 205a, 205b are conductively connected to switching members 210a, 210b, which switching members 210a, 210b, in a first configuration as shown in figure 5, connect the electrodes 205a, 205b to the potential difference measuring means 211.
- the electrodes 205a, 205b are conductively connected to the electromagnetic shielding 201.
- the switching means may be operated to select two different modes of operation of the embodiment of the GPR shown in figure 5.
- the electrodes 205 of the GPR of this embodiment can be switched to a first configuration wherein they provide grounding to the electromagnetic shielding 201 for use with the radar 202,203, or to a second configuration wherein the electrodes 205 are conductively connected to potential difference measuring means 211 for measuring a potential difference between the electrodes.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Computer Networks & Wireless Communication (AREA)
- General Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Geophysics And Detection Of Objects (AREA)
Abstract
La présente invention concerne un radar pénétrant GPR, ainsi qu'un procédé d'utilisation de celui-ci. L'invention concerne en particulier un radar pénétrant GPR présentant un plan d'appui destiné à faire face au sol lors de l'utilisation, ledit radar pénétrant GPR comprenant une antenne émettrice pour émettre un signal dans le sol, une antenne réceptrice pour recevoir un signal réfléchi provenant du sol, et un blindage électromagnétique, l'antenne d'émission/réception étant située sensiblement entre le plan d'appui et le blindage électromagnétique. Le radar pénétrant GPR comprend en outre une électrode pouvant être connectée de manière conductible au blindage électromagnétique, et comportant une extrémité agencée pour s'étendre vers et/ou après ledit plan d'appui et entrer en contact de manière conductible avec le sol en cours d'utilisation.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP10728423A EP2446297A1 (fr) | 2009-06-23 | 2010-06-23 | Radar pénétrant gpr amélioré |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL1037058A NL1037058C2 (en) | 2009-06-23 | 2009-06-23 | Improved ground penetrating radar. |
NL1037058 | 2009-06-23 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2010151125A1 true WO2010151125A1 (fr) | 2010-12-29 |
Family
ID=42724198
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/NL2010/050388 WO2010151125A1 (fr) | 2009-06-23 | 2010-06-23 | Radar pénétrant gpr amélioré |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP2446297A1 (fr) |
NL (1) | NL1037058C2 (fr) |
WO (1) | WO2010151125A1 (fr) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2012115937A1 (fr) * | 2011-02-22 | 2012-08-30 | PneumoSonics, Inc. | Dispositif d'antenne plan et structure |
NL2006587C2 (en) * | 2011-04-12 | 2012-10-15 | Groundtracer B V | Ground penetrating radar with control unit in antenna dead zone. |
WO2015115906A1 (fr) * | 2014-01-30 | 2015-08-06 | 3D-Radar As | Système d'antenne pour radar servant au sondage du sol |
EP2764573A4 (fr) * | 2011-10-07 | 2015-12-16 | 3D Radar As | Antenne de radar pénétrant |
US10514452B2 (en) | 2015-11-19 | 2019-12-24 | Electronics And Telecommunications Research Institute | Radar device and operation method thereof |
RU2820951C1 (ru) * | 2023-06-07 | 2024-06-13 | Федеральное государственное бюджетное учреждение науки Институт земного магнетизма, ионосферы и распространения радиоволн им. Н.В. Пушкова Российской академии наук (ИЗМИРАН) | Передатчик георадара |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3831173A (en) | 1969-12-17 | 1974-08-20 | Massachusetts Inst Technology | Ground radar system |
US6512475B1 (en) * | 1999-04-02 | 2003-01-28 | Geophysical Survey Systems, Inc. | High-frequency dual-channel ground-penetrating impulse antenna and method of using same for identifying plastic pipes and rebar in concrete |
US20060055584A1 (en) * | 2003-11-25 | 2006-03-16 | Waite James W | Sensor fusion for model-based detection in pipe and cable locator systems |
US20060284758A1 (en) * | 2003-08-15 | 2006-12-21 | Gregory Stilwell | Multi-mode landmine detector |
NL2002124C (en) | 2008-10-22 | 2010-04-23 | Groundtracer B V | Assembly and method for detection of submerged objects. |
-
2009
- 2009-06-23 NL NL1037058A patent/NL1037058C2/en not_active IP Right Cessation
-
2010
- 2010-06-23 EP EP10728423A patent/EP2446297A1/fr not_active Withdrawn
- 2010-06-23 WO PCT/NL2010/050388 patent/WO2010151125A1/fr active Application Filing
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3831173A (en) | 1969-12-17 | 1974-08-20 | Massachusetts Inst Technology | Ground radar system |
US6512475B1 (en) * | 1999-04-02 | 2003-01-28 | Geophysical Survey Systems, Inc. | High-frequency dual-channel ground-penetrating impulse antenna and method of using same for identifying plastic pipes and rebar in concrete |
US20060284758A1 (en) * | 2003-08-15 | 2006-12-21 | Gregory Stilwell | Multi-mode landmine detector |
US20060055584A1 (en) * | 2003-11-25 | 2006-03-16 | Waite James W | Sensor fusion for model-based detection in pipe and cable locator systems |
NL2002124C (en) | 2008-10-22 | 2010-04-23 | Groundtracer B V | Assembly and method for detection of submerged objects. |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2012115937A1 (fr) * | 2011-02-22 | 2012-08-30 | PneumoSonics, Inc. | Dispositif d'antenne plan et structure |
CN103476334A (zh) * | 2011-02-22 | 2013-12-25 | 纽默松尼克斯公司 | 平面天线设备和结构 |
NL2006587C2 (en) * | 2011-04-12 | 2012-10-15 | Groundtracer B V | Ground penetrating radar with control unit in antenna dead zone. |
EP2764573A4 (fr) * | 2011-10-07 | 2015-12-16 | 3D Radar As | Antenne de radar pénétrant |
US9478872B2 (en) | 2011-10-07 | 2016-10-25 | 3D-Radar As | Ground penetrating radar antenna |
WO2015115906A1 (fr) * | 2014-01-30 | 2015-08-06 | 3D-Radar As | Système d'antenne pour radar servant au sondage du sol |
CN106415324A (zh) * | 2014-01-30 | 2017-02-15 | 3D雷达公司 | 用于探地雷达的天线系统 |
US9843101B2 (en) | 2014-01-30 | 2017-12-12 | 3D-Radar As | Antenna system for ground penetrating radar |
US10514452B2 (en) | 2015-11-19 | 2019-12-24 | Electronics And Telecommunications Research Institute | Radar device and operation method thereof |
US10983203B2 (en) | 2015-11-19 | 2021-04-20 | Electronics And Telecommunications Research Institute | Radar device and operation method thereof |
RU2820951C1 (ru) * | 2023-06-07 | 2024-06-13 | Федеральное государственное бюджетное учреждение науки Институт земного магнетизма, ионосферы и распространения радиоволн им. Н.В. Пушкова Российской академии наук (ИЗМИРАН) | Передатчик георадара |
Also Published As
Publication number | Publication date |
---|---|
EP2446297A1 (fr) | 2012-05-02 |
NL1037058C2 (en) | 2011-02-15 |
NL1037058A (en) | 2010-12-27 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
KR101828238B1 (ko) | 안테나 혼선을 사용한 대지 관통 레이더 통신을 위한 시스템 및 방법 | |
EP2457113B1 (fr) | Procédé et système de détection de la proximité d'une structure conductrice enterrée | |
CA2776808C (fr) | Methode et appareil de detection d'objets enterres | |
NL1037058C2 (en) | Improved ground penetrating radar. | |
Bechtel et al. | Geophysical methods | |
GB2435693A (en) | Seabed electromagnetic surveying | |
US6725161B1 (en) | Method for locating and identifying underground structures with horizontal borehole to surface tomography | |
KR101267016B1 (ko) | 지피알 시스템을 이용한 지하시설물 탐측의 신호해석 장치 | |
Kobayashi et al. | Orthogonal dual polarization GPR measurement for detection of buried vertical fault | |
KR20140077474A (ko) | 분포형 tdr 센서를 이용한 침하계 | |
KR100684116B1 (ko) | 3차원 칼라 이동식 지표 레이다 장치 및 탐침 방법 | |
Bobe et al. | Exploring the potential of electromagnetic surface measurements for the characterisation of industrial landfills | |
Wada et al. | Small-diameter directional borehole radar system with 3D sensing capability | |
KR200188711Y1 (ko) | 지피알 시스템을 이용한 지하매설물 탐측장치의 안테나 구조 | |
JP3259544B2 (ja) | 海底埋設物の探査方法および装置 | |
US20230296755A1 (en) | System and method for avoiding utility strikes by construction equipment | |
Wada et al. | Foundation pile and cavity detection by the 3D directional borehole radar system, ReflexTracker | |
Bernold et al. | Ground penetrating radar technology to locate plastic pipes and lava tubes | |
KR200194862Y1 (ko) | 지피알 시스템을 이용한 일체형 지하매설물 탐측장치 | |
JPS60157065A (ja) | シ−ルド掘削機用土質監視装置 | |
KR200194861Y1 (ko) | 지피알 시스템을 이용한 지하매설물 탐측장치의 수신신호해석부 | |
McDonald et al. | Integrated geophysical surveys applied to karstic studies | |
KR200194863Y1 (ko) | 지피알 시스템을 이용한 수신신호 저장부를 갖는지하매설물 탐측장치 | |
KR200194860Y1 (ko) | 지피알 시스템을 이용한 지하매설물 탐측장치의 수신전치 증폭기 | |
KR200194864Y1 (ko) | 지피알 시스템을 이용한 지하매설물 탐측장치의 신호처리부 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 10728423 Country of ref document: EP Kind code of ref document: A1 |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2010728423 Country of ref document: EP |