CN103149440A - Non-contact type concrete resistivity testing instrument - Google Patents
Non-contact type concrete resistivity testing instrument Download PDFInfo
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- CN103149440A CN103149440A CN2013100715264A CN201310071526A CN103149440A CN 103149440 A CN103149440 A CN 103149440A CN 2013100715264 A CN2013100715264 A CN 2013100715264A CN 201310071526 A CN201310071526 A CN 201310071526A CN 103149440 A CN103149440 A CN 103149440A
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Abstract
The invention discloses a non-contact type concrete resistivity testing instrument. The non-contact type concrete resistivity testing instrument is characterized by comprising an inner working core barrel and an outer working core barrel, wherein the inner working core barrel and the outer working core barrel are assembled into a double-shell barrel body structure by adopting bolts; the double-shell barrel body structure is provided with a ring-shaped iron core and a current testing instrument which respectively surrounds opening ends of an upper barrel and a lower barrel of the inner working core barrel and the outer working core barrel, the inner wall of the inner working core barrel and the outer wall of the outer working core barrel; the inner wall of the outer working core barrel is provided with an induction coil which is connected with a voltage testing instrument outside the outer working core barrel by a wire; and the iron core on the outer wall of the outer working core barrel is wound with a primary coil which is connected with a power supply outside the outer working core barrel by a wire. The non-contact type concrete resistivity testing instrument disclosed by the invention is based on the electromagnetic mutual inductance principle, can be used for testing the resistivity when being buried and cast in concrete, and is suitable for monitoring the change of the resistivity of the concrete for a long time and in real time.
Description
Technical field
The present invention relates to a kind of concrete analyzer, particularly contactless concrete resistivity analyzer.
Background technology
Concrete structure engineering is widely used in the fields such as harbour, railway, national defence, industrial and agricultural production and life, but is restricting its usable range because of problems such as permanance.At present, miscellaneous measuring technology and equipment are applied to the concrete NDT aspect; The conventional concrete damnification recognition method is difficult to reflect original position concrete damage state, and Dynamic Non-Destruction Measurement is to obtain the better approach of the true damage of structure situ concrete.The concrete resistivity mensuration is a kind of comparatively new non-destructive testing technology, but have simple, fast, cost performance is high and the advantage such as remote real time monitoring, will become the new technology of a kind of fast detecting, on-line monitoring and effective evaluation xoncrete structure performance.Concrete resistivity refers to that the unit length concrete hinders the ability that electric current passes through, and can not only reflect concrete density and micromechanism, also can reflect exactly concrete degree of injury; Concrete resistivity is lower, and corrosion current is just easier by concrete, and the deteriorated possibility of steel bar corrosion is just larger, therefore but measure its resistance to corrosion of concrete resistivity effective evaluation and the existing reinforcement corrosion degree of assessment.In addition, measure concrete resistivity for on-line analysis, in real time, accurately and dynamically to monitor its variation significant.Conventional concrete resistivity measurement mode can be divided into contact and contactless two classes; Contact type measurement method commonly used is mainly two electrode method and four electrode methods, and nondestructive determination mainly contains ultrasonic method, radar method, acoustic-emission etc.yet, still there is deficiency to a certain degree in the existing concrete resistivity measurements, main manifestations is traditional detection technology and method not only examined environment and condition influence, and because of the sampling randomness cause result comparatively unilateral, Site Detection also can cause damages of concrete structures, can't eliminate the impact of contact resistance as two electrode methods, institute's measuring resistance is concrete material resistance, wire and surveying instrument, wire and electrode, the summation of electrode and concrete contact resistance etc., and the material of contact resistance and electrode, size is relevant, can not be equivalent to truly the resistivity of concrete material, four electrode method can reduce the impact of contact resistance preferably, but the electrode fabrication trouble, use DC measurement gained Stability of Resistivity and poor repeatability, its decision confidence is low, alternating current is measured more complicated, and the selection of frequency is also influential to resistivity.By contrast, eyes with non-contact method can be eliminated contact resistance preferably, but adopts DC measurement resistance can produce electric capacity and polarization effect, makes measured value and actual value error very large; Eyes with non-contact method is only applicable in the laboratory research to the cement-based material sample of early stage small size at present, and the on-line analysis of Practical Project is used few, and equipment needed thereby is expensive, as the AC impedance spectrometry etc.In view of the deficiency of existing concrete determination of resistivity method, be necessary to develop suitable concrete resistivity analyzer.
Summary of the invention
In order to make up existing method of testing and equipment in the deficiency aspect the mensuration concrete resistivity, the invention provides contactless concrete resistivity analyzer.Based on the undesirable mutual electromagnetic inductance principle, bury underground, build can be used for measuring its resistivity in concrete, because it is contactless, non-destructive determination device, made up the deficiency of existing concrete determination of resistivity method and equipment.
in order to realize above-mentioned technical purpose, technical scheme of the present invention is, contactless concrete resistivity analyzer, it is characterized in that comprising interior work core cylinder and outer work core cylinder, adopt bolt to be assembled into the bivalve tube structure between interior work core cylinder and outer work core cylinder, bolt is that on through hole and the interior work core cylinder on outer work core cylinder, threaded hole is connected the parts that reach fastening bivalve tube structure by running through, be provided with annular core and amperometric determination instrument on the tube structure of bivalve, annular core and amperometric determination instrument are respectively around the upper doffing openend of interior work core cylinder and outer work core cylinder, the cylinder inwall of interior work core cylinder and the drum outer wall of the core cylinder of working outward, the cylinder inwall of outer work core cylinder is provided with inductive coil, inductive coil connects the outer voltage determination instrument of outer work core cylinder by wire, be wound with primary coil on the iron core at the drum outer wall position of outer work core cylinder, primary coil connects the outer power supply of outer work core cylinder by wire.The present invention is based on the undesirable mutual electromagnetic inductance principle, bury underground, build and can be used for measuring its resistivity in concrete, because it is contactless, non-destructive determination device, made up the deficiency of existing concrete determination of resistivity method and equipment, have the advantages such as real-time, accurate, simple to operate, long service life and non-polarized, be suitable for long-term Real-Time Monitoring concrete resistivity and change.
The present invention is based on the undesirable mutual electromagnetic inductance principle, utilization is wound in iron core primary coil on one side after switching on power, the electromagnetic field that changes around it, the magnetic flux path that provides via iron core, the electromagnetic field that changes is put on concrete in Double-casing between outer work core cylinder and interior work core cylinder, because making, undesirable mutual electromagnetic inductance produces induced voltage and circular current in concrete, if adopt respectively voltage determination instrument and amperometric determination instrument can record corresponding induced voltage and circular current.During enforcement, need to bury, build described concrete resistivity analyzer underground in concrete detected part; If switch on power, primary coil will be as the parts that excite of whole system, iron core can provide magnetic flux path, concrete between Double-casing and inductive coil are all as secondary coil, utilize respectively induced voltage and the interior circular current of concrete in voltage determination instrument and amperometric determination instrument mensuration inductive coil, can obtain concrete resistivity.
Feature of the present invention is that also interior work core cylinder and outer work core cylinder are concentric tube.
Feature of the present invention also is casting concrete between the cylindrical shell of bivalve.
Feature of the present invention is that also the inductive coil employing is built or extrusion forming process is integrated with in outer work core cylinder.
Feature of the present invention is that also iron core is in part in interior work core cylinder and adopts and to build or extrusion forming process is integrated in interior work core cylinder.
Feature of the present invention is that also described power supply for the power supply of different frequency with the alternating current of power can be provided, is the electric supply installation of whole system.
Feature of the present invention is that also described voltage tester is the high-precision AC voltage tester, the induced voltage that produces in order to measure inductive coil, and its value is also the induced voltage in concrete between the cylindrical shell of bivalve.
Feature of the present invention is that also described amperometric determination instrument is the high-precision AC current tester, can measure the circular current that produces in the concrete mutual inductance process that the bivalve cylindrical shell builds.
Feature of the present invention is that also described iron core is that the very capable magnetic siliconized plate of magnetic conduction is made, and the magnetic flux path effect that provides is provided.
Feature of the present invention is that also described outer work core cylinder adopts phenoplast, polyurethane plastics, epoxy plastics, unsaturated polyester plastic, organic siliconresin and allyl resin and the polymer-modified resinous material thereof of non-conductive class to make, be that two and half cylindrical shells adopt bolted to become one, but have the through hole of two or more through bolts above half cylindrical shell.
Feature of the present invention is that also described bolt is that phenoplast, polyurethane plastics, epoxy plastics, unsaturated polyester plastic, organic siliconresin and allyl resin and the polymer-modified resinous material thereof of non-conductive class made, its termination is hexangle type, on screw rod with external thread, can run through outer work core cylinder, and can utilize screw thread to be fixed on interior work core cylinder, play outer work core cylinder and the effect of being fastened as a whole of interior work core cylinder.
Feature of the present invention is that also phenoplast, polyurethane plastics, epoxy plastics, unsaturated polyester plastic, organic siliconresin and the allyl resin of the non-conductive class of described interior work core cylinder and polymer-modified resinous material thereof make, employing is built or extrusion forming process is fixed one side of iron core and amperometric determination instrument, and its surface has hole and the hole inside surface has screw thread in order to fastening bolt.
Feature of the present invention is that also described primary coil is enameled wire loop, and it is by wire connecting power and be wound in iron core on one side, with the electromagnetic field that changes, is the parts that excite of whole system.
Feature of the present invention is that also described inductive coil is to be divided into the enameled wire loop of two sections, the termination of one section is insertion slot type, the termination of another section is corresponding plug-type, inductive coil is used builds or extrusion forming process is integrated in outer work core cylinder, during assembling, the plug of inductive coil is connected with the slot end and gets final product, another two ends connect the voltage determination instrument by wire.
Feature of the present invention is that also described outer work core cylinder and interior work core cylinder utilize bolted to be the bivalve tube structure between the two, but casting concrete therebetween, this concrete can be used as secondary coil, and the circular current that produces in it can utilize the amperometric determination instrument namely to record.
The invention has the beneficial effects as follows:
1, the present invention is based on the undesirable mutual electromagnetic inductance principle and propose, have Real-Time Monitoring, measure fast, repeatability is good and the advantage such as structure novelty, belongs to harmless, contactless concrete resistivity determination techniques, has made up the deficiency of existing assay method and equipment.
2, the present invention eliminated that in the test of traditional resistor rate, electrode separates with the contraction that the cement-based material contact produces, the problems such as electrode corrosion, contact resistance, electrode interference, polarization and capacity effect, improved the precision of concrete resistivity test.
3, adopt the present invention can effectively get rid of the external environment factor to the impact of proving installation, can measure for a long time varying environment Under Concrete change in resistance, its simple structure, easy operating.
Description of drawings
Fig. 1 is the structural representation of embodiment of the present invention concrete resistivity analyzer;
Fig. 2 is the outer work core-tube structure sectional view of concrete resistivity analyzer of the present invention;
Fig. 3 is the interior work core-tube structure sectional view of concrete resistivity analyzer of the present invention;
Wherein 1 is power supply, and 2 is voltage tester, and 3 is outer work core cylinder, and 4 is interior work core cylinder, and 5 is bolt, and 6 is primary coil, and 7 is inductive coil, and 8 are the amperometric determination instrument, and 9 is wire, and 10 is iron core, 11 threaded holes, 12 through holes.
Embodiment
Following embodiment is to the further illustrating of the technology of the present invention content, but is not the restriction to flesh and blood of the present invention.
The concrete resistivity analyzer comprises power supply 1, amperometric determination instrument 8, voltage determination instrument 2, iron core 10, outer work core cylinder 3, wire 9, interior work core cylinder 4, bolt 5,11 threaded holes, 12 through holes, primary coil 6 and inductive coil 7.the concrete resistivity analyzer comprises interior work core cylinder 4 and outer work core cylinder 3, adopt bolt 5 to be assembled into the bivalve tube structure between interior work core cylinder 4 and outer work core cylinder 3, bolt 5 is that on through hole 12 and the interior work core cylinder 4 on outer work core cylinder 3, threaded hole 11 is connected the parts that reach fastening bivalve tube structure by running through, be provided with an annular core 10 and an amperometric determination instrument 8 on the tube structure of bivalve, annular core 10 and amperometric determination instrument 8 are respectively around the upper doffing openend of interior work core cylinder 4 and outer work core cylinder 3, the cylinder inwall of interior work core cylinder 4 and the drum outer wall of the core cylinder 3 of working outward, the cylinder inwall of outer work core cylinder 3 is provided with inductive coil 7, inductive coil 7 connects the outer voltage determination instrument 2 of outer work core cylinder 3 by wire 9, be wound with primary coil 6 on the iron core 10 at the drum outer wall position of outer work core cylinder 3, primary coil 6 connects the outer power supply 1 of outer work core cylinder 3 by wire 9.Fig. 1 is the structural representation of embodiment of the present invention concrete resistivity analyzer, as shown in Figure 1, inductive coil 7 connects voltage determination instrument 2 by wire 9, and be used and build or extrusion forming process is integrated in outer work core cylinder 3, primary coil 6 connects power supply 1 by wire 9, and be wound in one side of iron core 10, and one side of the corresponding Symmetry Edge of iron core 10 and amperometric determination instrument 8 all is used and builds or extrusion forming process is integrated in interior work core cylinder 4, outer work core cylinder 3 and interior work core cylinder 4 adopt bolt 5 to be assembled into the bivalve tube structure between the two, but casting concrete between this bivalve cylindrical shell.Fig. 2 is the outer work core-tube structure sectional view of concrete resistivity analyzer of the present invention, as shown in Figure 2, outer work core cylinder 3 is that two thin-walleds, half cylindrical shell adopts the fastening integral body that becomes of hex bolts 5, have two or more through holes 12 that run through for bolt 5 on it, contain in outer work core cylinder 3 to adopt and build or the inductive coil 7 of extrusion forming process.Fig. 3 is the interior work core-tube structure sectional view of concrete resistivity analyzer of the present invention, as shown in Figure 3, interior work core cylinder 4 is for having the solid cylindrical shell of certain size, and adopt and to build or extrusion forming process becomes one one side and the amperometric determination instrument 8 of iron core 10 on one side, two or morely on it have a threaded hole 11, itself and outer work core cylinder 3 can be assembled into integral body by bolt 5.
Feature of the present invention is that also interior work core cylinder 4 and outer work core cylinder 3 are concentric tube.
Feature of the present invention also is casting concrete between the cylindrical shell of bivalve.
Feature of the present invention is that also inductive coil 7 employings are built or extrusion forming process is integrated in outer work core cylinder 3.
Feature of the present invention is that also iron core 10 is in part in interior work core cylinder 4 and adopts and to build or extrusion forming process is integrated in interior work core cylinder.
Feature of the present invention is that also power supply 1 for the power supply of different frequency with the alternating current of power can be provided, is the electric supply installation of whole system.
Feature of the present invention is that also described voltage tester 2 is the high-precision AC voltage tester, the induced voltage that produces in order to measure inductive coil 7, and its value is also the induced voltage in concrete between the cylindrical shell of bivalve.
Feature of the present invention is that also described amperometric determination instrument 8 is the high-precision AC current tester, can measure the circular current that produces in the concrete mutual inductance process that the bivalve cylindrical shell builds.
Feature of the present invention is that also described iron core 10 makes for the very capable magnetic siliconized plate of magnetic conduction, and the magnetic flux path effect that provides is provided.
Feature of the present invention is that also described outer work core cylinder 3 makes for the phenoplast of non-conductive class, polyurethane plastics, epoxy plastics, unsaturated polyester plastic, organic siliconresin and allyl resin and polymer-modified resinous material thereof, be that two and half cylindrical shells adopt bolts 5 to be tightened to be integrated, but have the through hole of two or more through bolts 5 above half cylindrical shell.
Feature of the present invention is that also described bolt 5 makes for the phenoplast of non-conductive class, polyurethane plastics, epoxy plastics, unsaturated polyester plastic, organic siliconresin and allyl resin and polymer-modified resinous material thereof, its termination is hexangle type, on screw rod with external thread, can run through outer work core cylinder 3, and can utilize screw thread to be fixed on interior work core cylinder 4, play outer work core cylinder 3 and interior work core cylinder 4 effects of being fastened as a whole.
Feature of the present invention is that also described interior work core cylinder 4 makes for the phenoplast of non-conductive class, polyurethane plastics, epoxy plastics, unsaturated polyester plastic, organic siliconresin and allyl resin and polymer-modified resinous material thereof, employing is built or extrusion forming process is fixed one side of iron core 10 and amperometric determination instrument 8, and its surface has hole and the hole inside surface has screw thread in order to fastening bolt 5.
Feature of the present invention is that also described primary coil 6 is enameled wire loop, and it connects power supply 1 and be wound in iron core 10 on one side by wire 9, to change electromagnetic field, is the parts that excite of whole system.
Feature of the present invention is that also described inductive coil 7 is for being divided into the enameled wire loop of two sections, the termination of one section is insertion slot type, the termination of another section is corresponding plug-type, inductive coil 7 is used builds or extrusion forming process is integrated in outer work core cylinder 3, during assembling, the plug of inductive coil 3 is connected with the slot end and gets final product, another two ends connect voltage determination instrument 2 indirectly to obtain induced voltage by wire 9.
Feature of the present invention is that also it is the bivalve tube structure that described outer work core cylinder 3 and interior work core cylinder 4 utilize bolt 5 fastening between the two, but casting concrete between this structure, and concrete can play the secondary coil effect, and the circular current that produces can utilize amperometric determination instrument 8 to record.
The present invention is based on electromagnetic induction principle, utilization is wound in iron core 10 primary coil 6 on one side and is switching on power after 1, the electromagnetic field that changes around it, the magnetic flux path that provides via iron core 10, the electromagnetic field that changes is put on the concrete in the Double-casing of 4, outer work core cylinder 3 and interior work core cylinder, because making, undesirable mutual electromagnetic inductance produces induced voltage and circular current in concrete, if adopt voltage determination instrument 2 and amperometric determination instrument 8 can record induced voltage and circular current.
During enforcement, need to bury, build described concrete resistivity analyzer underground in concrete detected part; If switch on power 1, primary coil 6 will be as exciting parts, iron core 10 can provide magnetic flux path, concrete between Double-casing and inductive coil 7 are all as secondary coil, utilize respectively induced voltage and the interior circular current of concrete in voltage determination instrument 2 and amperometric determination instrument 8 mensuration inductive coils 7, can obtain concrete resistivity, shown in (1).
In formula: U is induced voltage, and I is circular current, r
1Be the internal diameter of outer work core cylinder, r
0Be the external diameter of interior work core cylinder, h is the height of outer work core cylinder.
Claims (10)
1. contactless concrete resistivity analyzer, it is characterized in that comprising interior work core cylinder and outer work core cylinder, adopt bolt to be assembled into the bivalve tube structure between interior work core cylinder and outer work core cylinder, bolt is that on through hole and the interior work core cylinder on outer work core cylinder, threaded hole is connected the parts that reach fastening bivalve tube structure by running through, be provided with annular core and amperometric determination instrument on the tube structure of bivalve, annular core and amperometric determination instrument are respectively around the upper doffing openend of interior work core cylinder and outer work core cylinder, the cylinder inwall of interior work core cylinder and the drum outer wall of the core cylinder of working outward, the cylinder inwall of outer work core cylinder is provided with inductive coil, inductive coil connects the outer voltage determination instrument of outer work core cylinder by wire, be wound with primary coil on the iron core at the drum outer wall position of outer work core cylinder, primary coil connects the outer power supply of outer work core cylinder by wire.
2. contactless concrete resistivity analyzer according to claim 1, is characterized in that, interior work core cylinder and outer work core cylinder are concentric tube.
3. contactless concrete resistivity analyzer according to claim 1, is characterized in that casting concrete between the cylindrical shell of bivalve.
4. contactless concrete resistivity analyzer according to claim 3, is characterized in that, the inductive coil employing is built or extrusion forming process is integrated in outer work core cylinder.
5. contactless concrete resistivity analyzer according to claim 1, is characterized in that, iron core is in part in interior work core cylinder to be adopted and to build or extrusion forming process is integrated in interior work core cylinder.
6. the described contactless concrete resistivity analyzer of arbitrary claim according to claim 1 to 5, is characterized in that, described power supply is for providing the power supply of different frequency with the alternating current of power.
7. the described contactless concrete resistivity analyzer of arbitrary claim according to claim 1 to 5, is characterized in that, described voltage tester is the high-precision AC voltage tester, in order to measure the induced voltage in inductive coil.
8. the described contactless concrete resistivity analyzer of arbitrary claim according to claim 1 to 5, it is characterized in that, described amperometric determination instrument is the high-precision AC current tester, can measure the circular current that between the cylindrical shell of bivalve, concrete produces in the undesirable mutual electromagnetic inductance process.
9. the described contactless concrete resistivity analyzer of arbitrary claim according to claim 1 to 5, is characterized in that, described iron core is the very capable magnetic siliconized plate of magnetic conduction.
10. the described contactless concrete resistivity analyzer of arbitrary claim according to claim 1 to 5, it is characterized in that, described outer work core cylinder adopts the phenoplast of non-conductive class, polyurethane plastics, epoxy plastics, unsaturated polyester plastic, organic siliconresin or allyl resin are made, perhaps adopt the phenoplast of non-conductive class, polyurethane plastics, epoxy plastics, unsaturated polyester plastic, the polymer-modified resinous material of organic siliconresin or allyl resin is made, outer work core cylinder is two and half cylindrical shells, but have the through hole of two or more through bolts on half cylindrical shell, the outer work core cylinder that two and half cylindrical shells adopt bolted to become one, perhaps bolt adopts the phenoplast of non-conductive class, polyurethane plastics, epoxy plastics, unsaturated polyester plastic, organic siliconresin or allyl resin are made, perhaps adopt the phenoplast of non-conductive class, polyurethane plastics, epoxy plastics, unsaturated polyester plastic, the polymer-modified resinous material of organic siliconresin or allyl resin is made, bolt end is hexangle type, screw rod is outer with screw thread, can run through outer work core cylinder, and the core cylinder of working outward utilizes screw thread to be fixed on interior work core cylinder, play outer work core cylinder and the effect of being assembled into one of interior work core cylinder, perhaps, work core cylinder adopts phenoplast, polyurethane plastics, epoxy plastics, unsaturated polyester plastic, organic siliconresin or the allyl resin of non-conductive class to make, perhaps adopt the polymer-modified resinous material of phenoplast, polyurethane plastics, epoxy plastics, unsaturated polyester plastic, organic siliconresin or the allyl resin of non-conductive class to make, interior work core cylinder adopts builds or extrusion forming process is fixed one side of iron core and amperometric determination instrument, interior work core cylinder surface have contain screw thread hole with fastening bolt, perhaps primary coil is enameled wire loop, and primary coil is by wire connecting power and be wound in iron core on one side, with the electromagnetic field that changes, is the parts that excite of whole system, perhaps inductive coil is to be divided into the enameled wire loop of two sections, one end termination of one section is insertion slot type, the one end termination of another section is corresponding plug-type, the inductive coil employing is built or extrusion forming process is integrated in outer work core cylinder, during assembling, the plug of inductive coil is connected with the slot end and gets final product, the another two ends of two sections enameled wire loops connect the voltage determination instrument by wire respectively.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310071526.4A CN103149440B (en) | 2013-03-06 | 2013-03-06 | Contactless concrete resistivity analyzer |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310071526.4A CN103149440B (en) | 2013-03-06 | 2013-03-06 | Contactless concrete resistivity analyzer |
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| CN103149440A true CN103149440A (en) | 2013-06-12 |
| CN103149440B CN103149440B (en) | 2015-11-25 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107860977A (en) * | 2017-11-03 | 2018-03-30 | 哈尔滨工业大学 | A kind of concrete, mortar resistivity sensor |
| CN110187183A (en) * | 2019-05-24 | 2019-08-30 | 太原理工大学 | Contactless original state Polluted Soil resistivity measurement device and method |
| CN111562441A (en) * | 2020-05-21 | 2020-08-21 | 太原理工大学 | Non-contact undisturbed polluted soil alternating-current impedance spectrum testing device and method |
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| US3068380A (en) * | 1959-06-01 | 1962-12-11 | Ibm | Magnetic core testing device |
| US5855721A (en) * | 1997-03-11 | 1999-01-05 | The Regents Of The University Of California | Non-destructive method of determining the position and condition of reinforcing steel in concrete |
| CN1399130A (en) * | 2001-07-19 | 2003-02-26 | 香港科技大学 | Device and method for measuring sample resistivity |
| CN102539928A (en) * | 2010-12-21 | 2012-07-04 | 香港科技大学 | Pore structure analyzer based on non-contact impedance measurement for cement-based materials |
| CN203133174U (en) * | 2013-03-06 | 2013-08-14 | 中南大学 | Non-contact concrete resistivity tester |
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2013
- 2013-03-06 CN CN201310071526.4A patent/CN103149440B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3068380A (en) * | 1959-06-01 | 1962-12-11 | Ibm | Magnetic core testing device |
| US5855721A (en) * | 1997-03-11 | 1999-01-05 | The Regents Of The University Of California | Non-destructive method of determining the position and condition of reinforcing steel in concrete |
| CN1399130A (en) * | 2001-07-19 | 2003-02-26 | 香港科技大学 | Device and method for measuring sample resistivity |
| CN102539928A (en) * | 2010-12-21 | 2012-07-04 | 香港科技大学 | Pore structure analyzer based on non-contact impedance measurement for cement-based materials |
| CN203133174U (en) * | 2013-03-06 | 2013-08-14 | 中南大学 | Non-contact concrete resistivity tester |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107860977A (en) * | 2017-11-03 | 2018-03-30 | 哈尔滨工业大学 | A kind of concrete, mortar resistivity sensor |
| CN110187183A (en) * | 2019-05-24 | 2019-08-30 | 太原理工大学 | Contactless original state Polluted Soil resistivity measurement device and method |
| CN111562441A (en) * | 2020-05-21 | 2020-08-21 | 太原理工大学 | Non-contact undisturbed polluted soil alternating-current impedance spectrum testing device and method |
| CN111562441B (en) * | 2020-05-21 | 2023-05-02 | 太原理工大学 | Non-contact original contaminated soil alternating current impedance spectrum testing device and method |
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| CN103149440B (en) | 2015-11-25 |
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