CN118243612A - Monitoring system, monitoring method and monitoring probe for corrosion of steel bars in concrete - Google Patents
Monitoring system, monitoring method and monitoring probe for corrosion of steel bars in concrete Download PDFInfo
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- CN118243612A CN118243612A CN202410210601.9A CN202410210601A CN118243612A CN 118243612 A CN118243612 A CN 118243612A CN 202410210601 A CN202410210601 A CN 202410210601A CN 118243612 A CN118243612 A CN 118243612A
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 200
- 239000000523 sample Substances 0.000 title claims abstract description 190
- 230000007797 corrosion Effects 0.000 title claims abstract description 130
- 238000005260 corrosion Methods 0.000 title claims abstract description 130
- 239000004567 concrete Substances 0.000 title claims abstract description 92
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 50
- 239000010959 steel Substances 0.000 title claims abstract description 50
- 238000000034 method Methods 0.000 title claims abstract description 19
- 239000002184 metal Substances 0.000 claims abstract description 70
- 230000003287 optical effect Effects 0.000 claims abstract description 52
- 239000004020 conductor Substances 0.000 claims abstract 2
- 239000010410 layer Substances 0.000 claims description 55
- 238000001514 detection method Methods 0.000 claims description 29
- 239000000463 material Substances 0.000 claims description 14
- 239000000945 filler Substances 0.000 claims description 10
- 230000001678 irradiating effect Effects 0.000 claims description 6
- 239000011241 protective layer Substances 0.000 claims description 6
- 238000011161 development Methods 0.000 claims description 5
- 230000008569 process Effects 0.000 claims description 5
- 230000002787 reinforcement Effects 0.000 claims 1
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 6
- 238000004458 analytical method Methods 0.000 description 3
- 238000004364 calculation method Methods 0.000 description 3
- 239000011083 cement mortar Substances 0.000 description 3
- 238000005253 cladding Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 239000011150 reinforced concrete Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000002776 aggregation Effects 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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Abstract
The application provides a monitoring system, a monitoring method and a monitoring probe for corrosion of steel bars in concrete, which relate to the technical field of monitoring for corrosion of steel bars in concrete and comprise a base, a monitoring probe and a data acquisition instrument, wherein the monitoring probe is connected with the base and comprises a metal sheet to be tested, an optical probe and a probe electric lead; the data acquisition instrument is connected to the second end of the probe electrical conductor. The method can accurately acquire the corrosion signal in the concrete, deduce the corrosion time of the steel bars, and is suitable for monitoring the corrosion of the steel bars in the concrete in high humidity environments and underwater environments.
Description
Technical Field
The application relates to the technical field of monitoring of corrosion of steel bars in concrete, in particular to a monitoring system, a monitoring method and a monitoring probe for corrosion of steel bars in concrete.
Background
In the related art, for steel bar corrosion in a concrete structure, due to the complexity of the environment, the uncertainty of a corrosion mechanism and the randomness of durability parameters, the service life prediction result based on the existing durability model is inaccurate. For example, the durability monitoring method based on the anode ladder provided in the market can infer the initial corrosion time of the steel bar by the corrosion time of the sensor at the gradient position in the concrete, and determine the corrosion time of the sensor to determine the macro current or macro potential change before and after the corrosion of the anode region so as to identify, but when the internal humidity of the concrete is high, electrons on the surface of the anode are accumulated, and the anode is obviously negatively moved in balance potential, so that the anode is wrongly judged to be dulled, and therefore, the anode ladder cannot be applied to a high humidity environment.
Disclosure of Invention
The present invention aims to solve at least one of the technical problems in the related art to some extent.
Therefore, the embodiment of one aspect of the invention provides a system for monitoring corrosion of steel bars in concrete, which can not be influenced by the environment where the concrete is located, can accurately acquire corrosion signals in the concrete so as to infer corrosion time of the steel bars, and is suitable for monitoring the corrosion of the steel bars in the concrete in high humidity environment and underwater environment.
The embodiment of the other aspect of the invention provides a method for monitoring corrosion of steel bars in concrete.
An embodiment of yet another aspect of the present invention provides a monitoring probe.
The system for monitoring corrosion of the steel bar in the concrete comprises a base, a monitoring probe and a data acquisition instrument.
The monitoring probe is connected with the base, the base and the monitoring probe are buried in the concrete protection layer, the monitoring probe comprises a metal sheet to be tested, an optical probe and a probe electric lead, the metal sheet to be tested is provided with an external surface and a monitoring surface which are opposite along the thickness direction of the metal sheet to be tested, the external surface is close to the surface of the concrete protection layer, the optical probe is provided with a detection end and a connecting wire end, the detection end is positioned below the monitoring surface, the detection end is used for emitting optical signals and irradiating the monitoring surface to collect corrosion area data, the first end of the probe electric lead is connected with the connecting wire end, and the second end of the probe electric lead penetrates out of the concrete protection layer;
The data acquisition instrument is connected with the second end of the probe electric wire and is used for controlling the detection end to emit optical signals and analyzing the corrosion area data.
According to the system for monitoring corrosion of the reinforced concrete, the monitoring probe is embedded in the concrete protection layer so as to monitor the corrosion condition of the interior of the concrete in real time by the monitoring probe, wherein the detected metal sheet, the optical probe and the probe electric lead are matched to form a monitoring probe structure, the external surface of the detected metal sheet is contacted with the concrete protection layer, when the interior of the concrete is corroded, the corrosion of the detected metal sheet can be developed from the external surface to the monitoring surface, the optical probe can emit an optical signal to the monitoring surface of the detected metal sheet and irradiate the monitoring surface so as to acquire corrosion area data of the monitoring surface, the probe electric lead can transmit the data acquired by the optical probe to the data acquisition instrument, the data acquisition instrument can analyze the corrosion condition of the concrete from the outside according to the data information, and compared with the monitoring system in the related technology, the corrosion time of the concrete is identified by measuring macro current or macro potential change before and after the corrosion of the anode area, when the internal humidity of the concrete is high, the corrosion condition is easily caused by the electronic aggregation error judgment of the anode surface, the monitoring system can directly monitor the corrosion area of the detected metal sheet embedded in the concrete protection layer, thus the corrosion condition of the corrosion area of the detected metal sheet is not influenced by the corrosion of the environment in the concrete, the environment is accurately influenced by the environment corrosion condition of the reinforced concrete in the underwater environment, and the corrosion condition can be inferred.
In some embodiments, the base is connected to the rebar under test;
the monitoring probes are arranged at intervals along the extending direction of the base, and the heights of the monitoring probes are gradually increased one by one.
In some embodiments, a plurality of monitoring probes are arranged at equal intervals and in a same line along the extending direction of the base, and the difference of the heights of any two adjacent monitoring probes is equal.
In some embodiments, the monitoring probe further comprises a plastic overclad tube, the plastic overclad tube has a first opening, the optical probe is disposed in an inner cavity of the plastic overclad tube, the metal sheet to be tested is connected to the plastic overclad tube and closes the first opening, and a second end of the probe electrical lead passes out of the plastic overclad tube.
In some embodiments, the monitoring probe further comprises a filling layer and a supporting frame, the filling layer is arranged in the inner cavity of the plastic overcladding tube, at least part of the probe electrical lead and the connecting end are pre-buried in the filling layer, the filling layer is spaced apart from the detected metal sheet, the supporting frame is arranged in the inner cavity of the plastic overcladding tube and is connected with the filling layer and the detected metal sheet, and the plastic overcladding tube, the supporting frame, the detected metal sheet and the filling layer jointly form a detection cavity for accommodating the detection end.
In some embodiments, the filler layer is a cement mortar filler layer;
the support frame is a plastic support frame.
In some embodiments, the monitoring probe further comprises a bond pad, at least a portion of which is pre-buried in the filler layer, the bond pad having a wire groove for receiving the probe electrical wire.
In some embodiments, the bonding pad comprises a vertical section and a horizontal section connected, wherein the vertical section is pre-embedded in the filling layer, and the horizontal section is connected with the base;
The monitoring probe further comprises an external lead-out wire, the horizontal section is used for guiding the external lead-out wire, a pin of the external lead-out wire is connected with the second end of the probe electric wire, and the external lead-out wire is connected with the data acquisition instrument.
In some embodiments, the material of the metal sheet to be tested is the same as the material of the steel bar.
The method for monitoring corrosion of the steel bar in the concrete comprises the following steps of:
the base and the monitoring probe are buried in the concrete protective layer, and the second end of the probe electric wire is connected with the data acquisition instrument;
the data acquisition instrument acquires data once every set time, when the data acquisition instrument acquires data, the optical probe emits optical signals, irradiates a monitoring surface of a metal sheet to be detected, acquires corrosion area data of the monitoring surface, and feeds the corrosion area data back to the data acquisition instrument;
and analyzing the corrosion area data by the data acquisition instrument, and considering that the monitoring probe is corroded after the corrosion area exceeds 50% of the area of the monitoring surface, or else, the monitoring probe is not corroded.
The technical advantages of the method for monitoring the corrosion of the steel bar in the concrete according to the embodiment of the invention are the same as those of the system for monitoring the corrosion of the steel bar in the concrete, and are not repeated here.
In some embodiments, the step of analyzing the corrosion area data by the data acquisition instrument, and considering that the monitoring probe is corroded after the corrosion area exceeds 50% of the area of the monitoring surface, otherwise, the step of not corroding further comprises the step of recording the corrosion area data by the data acquisition instrument.
In some embodiments, the plurality of monitoring probes are arranged at equal intervals and in a collinear manner along the extending direction of the base, the heights of the plurality of monitoring probes are gradually increased one by one, and the difference value of the heights of any two adjacent monitoring probes is equal;
and analyzing the corrosion area data by the data acquisition instrument, and after the corrosion area exceeds 50% of the area of the monitoring surface, regarding as the corrosion of the monitoring probe, otherwise, the step of not corroding further comprises the step of analyzing the corrosion area data of the detected metal sheet acquired by the monitoring probe at each position by the data acquisition instrument, namely, early warning the corrosion of the steel bar to be detected in advance in the development process of the corrosion of the concrete protection layer by the external corrosion.
A monitoring probe according to an embodiment of the invention includes a metal sheet to be tested, an optical probe and a probe electrical lead.
Wherein the detected metal sheet is provided with a monitoring surface;
The optical probe is provided with a detection end and a connecting end, the detection end is positioned below the monitoring surface, and the detection end is used for emitting optical signals and irradiating the monitoring surface to acquire corrosion area data;
The first end of the probe electric wire is connected with the connecting wire end, and the second end of the probe electric wire is used for being connected with a data acquisition instrument.
The technical advantages of the monitoring probe according to the embodiment of the invention are the same as those of the above-mentioned system for monitoring corrosion of the steel bar in concrete, and will not be described here again.
Additional aspects and advantages of the application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the application.
Drawings
Fig. 1 is a schematic structural view of a system for monitoring corrosion of reinforcing steel bars in concrete according to an embodiment of the present invention.
Fig. 2 is a schematic structural view of a monitoring probe in a system for monitoring corrosion of reinforcing steel bars in concrete according to an embodiment of the present invention.
Fig. 3 is a block diagram of the control relationship between the data acquisition instrument and the optical probe of the in-concrete rebar corrosion monitoring system according to an embodiment of the invention.
Reference numerals: 1. the device comprises a base, 2, a monitoring probe, 21, a metal sheet to be tested, 211, an external surface, 212, a monitoring surface, 22, an optical probe, 221, a detection end, 222, a wire connecting end, 23, a probe electric wire, 24, a plastic cladding pipe, 25, a filling layer, 26, a supporting frame, 27, a detection cavity, 28, a bonding pad, 281, a vertical section, 282, a horizontal section, 29, an external lead-out wire, 3 and a data acquisition instrument.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below by referring to the drawings are illustrative and intended to explain the present invention and should not be construed as limiting the invention.
As shown in fig. 1 to 3, a system for monitoring corrosion of reinforcing steel bar in concrete according to an embodiment of the present invention includes a base 1, a monitoring probe 2, and a data acquisition instrument 3.
The monitoring probe 2 is connected with the base 1, the base 1 and the monitoring probe 2 are buried in the concrete protection layer, the monitoring probe 2 comprises a measured metal sheet 21, an optical probe 22 and a probe electric lead 23, the measured metal sheet 21 is provided with an external surface 211 and a monitoring surface 212 which are opposite along the thickness direction of the measured metal sheet, the external surface 211 is close to the surface of the concrete protection layer, the optical probe 22 is provided with a detection end 221 and a connecting line end 222, the detection end 221 is positioned below the monitoring surface 212, the detection end 221 is used for emitting optical signals and irradiating the monitoring surface 212 to collect corrosion area data, the first end of the probe electric lead 23 is connected with the connecting line end 222, and the second end of the probe electric lead 23 penetrates out of the concrete protection layer.
Wherein, the data acquisition instrument 3 is connected with the second end of the probe electric wire 23, and the data acquisition instrument 3 is used for controlling the probe end 221 to emit light signals and analyzing corrosion area data.
According to the system for monitoring reinforced corrosion in concrete, disclosed by the embodiment of the application, the monitoring probe 2 is pre-embedded in the concrete protection layer so as to monitor the corrosion condition in the concrete in real time by the monitoring probe 2, wherein the detected metal sheet 21, the optical probe 22 and the probe electric wire 23 are matched to form a monitoring probe 2 structure, the external surface 211 of the detected metal sheet 21 is in contact with the concrete protection layer, when corrosion occurs in the concrete, the corrosion to the detected metal sheet 21 can be developed from the external surface 211 to the monitoring surface 212, the optical probe 22 can emit an optical signal to the monitoring surface 212 of the detected metal sheet 21 and irradiate the monitoring surface 212 to acquire corrosion area data of the monitoring surface 212, the probe 23 can transmit the data acquired by the optical probe 22 to the data acquisition instrument 3, and the data acquisition instrument 3 can analyze the corrosion condition of the concrete from the outside according to the data information.
It should be noted that, in general, when the inside of the concrete is corroded, the steel bar at the concrete protection layer is affected by corrosion first, so the detected metal sheet 21 is pre-embedded in the concrete protection layer to cooperate with the optical probe 22 to monitor the corrosion condition of the inside of the concrete, the monitored data is more accurate than other positions, and the detected metal sheet 21 is directly contacted with the concrete, so the corrosion condition of the inside of the concrete can be reflected by the corrosion of the detected metal sheet 21, the monitored data is also more reliable, the surface of the monitored surface 212 irradiated by the optical probe 22 is smooth before the monitored surface 212 is not corroded, otherwise, the surface of the monitored surface 212 is rough, and therefore, the corrosion area of the detected metal sheet 21 can be obtained according to the rough range of the surface of the monitored surface 212.
In addition, the monitoring system can be used for monitoring the corrosion condition of the steel bars in the concrete in the high humidity environment and the underwater environment, and can also be used for monitoring the corrosion condition of the steel bars in the concrete in the special environments other than the special environments, namely, the corrosion condition of the steel bars in the concrete in the common environment, and the monitoring system is not influenced by the environment in the special environments, and the monitoring result is accurate.
Specifically, the optical probe 22 may be an existing commercial optical probe 22, and the data acquisition device 3 may also be known in the art.
As shown in fig. 1, in some embodiments, the base 1 is connected to a rebar under test.
The monitoring probes 2 are arranged at intervals along the extending direction of the base 1, and the heights of the monitoring probes 2 are gradually increased one by one.
The base 1 is connected with the steel bars to be tested, the position of the monitoring system is fixed, the plurality of monitoring probes 2 are arranged, so that monitoring data comparison can be formed, the accuracy of the monitoring data is further ensured, and the corrosion area conditions collected by the monitoring probes 2 at different positions can be judged according to the inconsistent heights of the plurality of monitoring probes 2, the development process of the concrete corroded by the outside is judged, and early warning is carried out on the corrosion of the steel bars in the concrete.
Specifically, the base 1 is a steel bracket, the number and the height of the monitoring probes 2 can be specifically determined according to the thickness of the concrete protection layer, the number is generally four or six, etc., and the monitoring probes 2 can be fixed on the base 1 in a welding manner.
In addition, when the monitoring system is pre-buried, the monitoring probe 2 can be sequentially fixed with the base 1, the base 1 is bound on the reinforcing steel bar, and finally concrete pouring is carried out on the reinforcing steel bar.
As shown in fig. 1, in some embodiments, a plurality of monitoring probes 2 are arranged at equal intervals and in a line along the extending direction of the base 1, and the difference in height between any two adjacent monitoring probes 2 is equal.
In order to facilitate the later calculation and analysis of the data acquisition instrument 3 in the monitoring system, a plurality of monitoring probes 2 can be distributed at equal intervals and in a collinear manner along the extending direction of the base 1, and the difference values of the heights of the adjacent monitoring probes 2 are equal, so that the influence of the number of monitoring variables on the calculation and analysis difficulty in actual analysis and calculation is reduced.
Specifically, taking the length of the base 1 as 480 mm as an example, one monitoring probe 2 may be fixed on the base 1 at intervals of 80 mm along the extending direction thereof, wherein the width of each monitoring probe 2 along the extending direction of the base 1 is 20mm, the difference between the heights of two adjacent monitoring probes 2 is 5 mm (may also be 10 mm), the distance between the external surface 211 of the metal sheet 21 to be measured and the surface of the concrete protective layer is 10mm, and the distances between the external surface 211 of the metal sheet 21 to be measured and the surface of the concrete protective layer in the other monitoring probes 2 are 15 mm, 20mm and 25 mm in sequence.
As shown in fig. 2, in some embodiments, the monitoring probe 2 further includes a plastic overclad tube 24, the plastic overclad tube 24 has a first opening, the optical probe 22 is disposed in an inner cavity of the plastic overclad tube 24, the metal sheet 21 to be tested is connected to the plastic overclad tube 24 and closes the first opening, and a second end of the probe electrical wire 23 passes out of the plastic overclad tube 24.
The plastic cladding pipe 24 is matched with the detected metal sheet 21, so that the packaging of the optical probe 22 and the probe electric wires 23 is realized, the optical probe 22 can smoothly monitor the monitoring surface 212 of the detected metal sheet 21 in real time after the later monitoring probe 2 is pre-buried in the concrete protective layer, the damage to the detected metal sheet 21 caused by external force is avoided, and meanwhile, the cladding pipe is made of plastic material, so that the monitoring probe 2 is light in weight and low in cost.
Specifically, the sheath may be a PVC sheath, the gauge of the metal sheet 21 to be tested may be equal to the gauge of the first opening, and the second end of the probe electrical lead 23 may be threaded out of the plastic sheath 24 at the end opposite the first opening.
As shown in fig. 2, in some embodiments, the monitoring probe 2 further includes a filling layer 25 and a supporting frame 26, the filling layer 25 is disposed in the inner cavity of the plastic overclad tube 24, at least a portion of the probe electrical wire 23 and the connecting end 222 are pre-buried in the filling layer 25, the filling layer 25 is spaced apart from the metal sheet 21 to be tested, the supporting frame 26 is disposed in the inner cavity of the plastic overclad tube 24 and connects the filling layer 25 and the metal sheet 21 to be tested, and the plastic overclad tube 24, the supporting frame 26, the metal sheet 21 to be tested and the filling layer 25 together form a detection cavity 27 for accommodating the detection end 221.
The metal sheet 21 to be tested is supported at the first opening by the support frame 26, meanwhile, a detection cavity 27 is formed between the metal sheet 21 to be tested and the detection end 221, and the filling layer 25 can fix the optical probe 22 in the plastic overcladding tube 24 so as to ensure the relative position of the optical probe 22 and the monitoring surface 212 of the metal sheet 21 to be tested, and reduce the influence of external vibration and the like on the normal monitoring of the optical probe 22.
Specifically, the metal sheet 21 to be tested may be adhered to the support frame 26 with glue.
In some embodiments, as shown in fig. 2, the filler layer 25 is a cement mortar filler layer 25.
The support 26 is a plastic support 26.
The adoption of the plastic support frame 26 further makes the monitoring probe 2 light and low in cost.
As shown in fig. 1 and 2, in some embodiments, the monitoring probe 2 further includes a bond pad 28, at least a portion of the bond pad 28 being pre-embedded in the filler layer 25, the bond pad 28 having a wire slot for receiving the probe electrical wire 23.
As shown in fig. 1 and 3, in some embodiments, the bond pad 28 includes a vertical segment 281 and a horizontal segment 282 that are connected, the vertical segment 281 being embedded in the filler layer 25, the horizontal segment 282 being connected to the base 1.
The monitoring probe 2 further comprises an external lead-out wire 29, the horizontal segment 282 is used for guiding the external lead-out wire 29, a pin of the external lead-out wire 29 is connected with the second end of the probe electric wire 23, and the external lead-out wire 29 is connected with the data acquisition instrument 3.
The bonding pads 28 are designed to comb the probe electrical leads 23 and the external lead-out leads 29, so that the leads in the whole monitoring system are regular, the mutual interference between the leads is reduced, and the later maintenance is convenient.
Specifically, the vertical section 281 is provided with a wire groove for accommodating the probe electric wire 23, and the horizontal section 282 may also be provided with a wire groove for accommodating the external lead-out wire 29.
As shown in fig. 2, in some embodiments, the measured metal sheet 21 is made of the same material as the steel bar.
The material design of the detected metal sheet 21 is the same as the material of the steel bar, and at the moment, the detected metal sheet 21 is the same as the steel bar in the concrete to the greatest extent in aspects of corrosion speed, corrosion performance and the like, so that the problem that the actual corrosion condition deviation is large due to the influence of the respective materials when the material of the detected metal sheet 21 is different from the steel bar material is effectively avoided, and the accuracy of monitoring the corrosion condition in the concrete is further improved.
As shown in fig. 1 to 3, the method for monitoring corrosion of steel bars in concrete according to the embodiment of the invention comprises the following steps:
the base 1 and the monitoring probe 2 are buried in a concrete protective layer, and the second end of the probe electric wire 23 is connected with the data acquisition instrument 3;
The data acquisition instrument 3 acquires data once every set time, when the data acquisition instrument 3 acquires data, the optical probe 22 emits optical signals to irradiate the monitoring surface 212 of the metal sheet 21 to be detected, the corrosion area data of the monitoring surface 212 are acquired, and the corrosion area data are fed back to the data acquisition instrument 3;
the data acquisition instrument 3 analyzes the corrosion area data, and the corrosion area is regarded as corrosion of the monitoring probe 2 after exceeding 50% of the area of the monitoring surface 212, otherwise, the corrosion is not performed.
The technical advantages of the method for monitoring the corrosion of the steel bar in the concrete according to the embodiment of the invention are the same as those of the system for monitoring the corrosion of the steel bar in the concrete, and are not repeated here.
In some embodiments, the data acquisition instrument 3 analyzes the corrosion area data, and the corrosion area is considered to be corroded by the monitoring probe 2 after exceeding 50% of the area of the monitoring surface 212, otherwise the step of not corroding further comprises the data acquisition instrument 3 recording the corrosion area data.
In some embodiments, there are a plurality of monitoring probes 2, the plurality of monitoring probes 2 are arranged at equal intervals and in a same line along the extending direction of the base 1, the heights of the plurality of monitoring probes 2 are gradually increased one by one, and the difference between the heights of any two adjacent monitoring probes 2 is equal.
The data acquisition instrument 3 analyzes the corrosion area data, and after the corrosion area exceeds 50% of the area of the monitoring surface 212, the monitoring probe 2 is considered to be corroded, otherwise, the step of not corroding further comprises the step of analyzing the development process of the concrete protection layer corroded by the outside according to the corrosion area data of the detected metal sheet 21 acquired by the monitoring probe 2 at each position by the data acquisition instrument 3, and early warning the corrosion of the steel bar to be detected.
As shown in fig. 2, a monitoring probe 2 according to an embodiment of the present invention includes a metal sheet 21 to be measured, an optical probe 22, and probe electric wires 23.
The metal sheet 21 to be tested has a monitoring surface 212.
The optical probe 22 has a probe end 221 and a connection end 222, the probe end 221 is located below the monitoring surface 212, and the probe end 221 is used for emitting an optical signal and irradiating the monitoring surface 212 to collect corrosion area data.
Wherein a first end of the probe electrical lead 23 is connected to the wiring end 222 and a second end of the probe electrical lead 23 is adapted to be connected to the data acquisition instrument 3.
The technical advantages of the monitoring probe according to the embodiment of the invention are the same as those of the above-mentioned system for monitoring corrosion of the steel bar in concrete, and will not be described here again.
The concrete inner steel bar corrosion monitoring system is combined with the concrete structure, and the monitoring method is described specifically as follows:
1) Manufacturing a monitoring probe 2, adhering a cut metal sheet 21 to be tested, which is the same as a reinforcing steel bar material, to a support frame 26 by using glue, enabling a probe electric wire 23 to be contained in a wire groove of a vertical section 281 of a bonding pad 28, enabling at least part of an optical probe 22 to be positioned outside the wire groove, enabling the vertical section 281 of the bonding pad 28 to penetrate through a plastic overcladding tube 24, enabling the optical probe 22 to be positioned in an inner cavity of the plastic overcladding tube 24, enabling the probe electric wire 23 to penetrate through the plastic overcladding tube 24 through the vertical section 281 of the bonding pad 28, placing the support frame 26 in the inner cavity of the plastic overcladding tube 24, closing a first opening by the metal sheet 21 to be tested, filling the inner cavity of the plastic overcladding tube 24 with cement mortar filler to form a filling layer 25, and ensuring that a detection cavity 27 for containing a detection end 221 is formed among the plastic overcladding tube 24, the support frame 26, the metal sheet 21 to be tested and the filling layer 25 after filling;
2) The monitoring probes 2 in the four steps 1) are fixed on the base 1 at equal intervals and in a collinear manner along the extending direction of the monitoring probes, the heights of the four monitoring probes 2 are gradually increased one by one, the horizontal section 282 of the bonding pad 28 is connected with the base 1, and the external lead-out wires 29 are arranged in the horizontal section 282, so that the pins of the external lead-out wires 29 are connected with the second ends of the electric leads 23 of the probes;
3) Binding the base 1 on the steel bars at the concrete protection layer, and performing concrete pouring on the steel bars, so that the monitoring system is pre-buried in the concrete protection layer;
4) The external lead-out wire 29 is connected with the data acquisition instrument 3, the data acquisition instrument 3 is set to acquire data once every set time, when the data acquisition instrument 3 acquires data, the optical probe 22 is controlled to emit optical signals, the monitoring surface 212 of the detected metal sheet 21 is irradiated, corrosion area data of the monitoring surface 212 are acquired, the corrosion area data are fed back to the data acquisition instrument 3, the data acquisition instrument 3 records and analyzes the corrosion area data, if the corrosion area exceeds 50% of the area of the monitoring surface 212, the position is regarded as the corrosion of the detected metal sheet 2, otherwise, the position is not corroded, and meanwhile, the data acquisition instrument 3 analyzes the development process of the concrete protection layer corroded by the outside according to the corrosion area data of the detected metal sheet 21 acquired by the monitoring probe 2 at each position so as to early warn the corrosion of the steel bars in the concrete.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
For purposes of this disclosure, the terms "one embodiment," "some embodiments," "example," "a particular example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
While embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the invention.
Claims (10)
1. A system for monitoring corrosion of steel reinforcement in concrete, comprising:
A base;
The monitoring probe is connected with the base, the base and the monitoring probe are buried in the concrete protection layer, the monitoring probe comprises a metal sheet to be tested, an optical probe and a probe electric lead, the metal sheet to be tested is provided with an external surface and a monitoring surface which are opposite along the thickness direction of the metal sheet to be tested, the external surface is close to the surface of the concrete protection layer, the optical probe is provided with a detection end and a connecting wire end, the detection end is positioned below the monitoring surface, the detection end is used for emitting optical signals and irradiating the monitoring surface to collect corrosion area data, a first end of the probe electric lead is connected with the connecting wire end, and a second end of the probe electric lead penetrates out of the concrete protection layer; and
The data acquisition instrument is connected with the second end of the probe electric wire and used for controlling the detection end to emit optical signals and analyzing the corrosion area data.
2. The system for monitoring corrosion of steel bars in concrete according to claim 1, wherein the base is connected with the steel bars to be tested;
the monitoring probes are arranged at intervals along the extending direction of the base, and the heights of the monitoring probes are gradually increased one by one.
3. The system of claim 1 or 2, wherein the probe further comprises a plastic overclad tube, the plastic overclad tube has a first opening, the optical probe is disposed in an inner cavity of the plastic overclad tube, the metal sheet to be tested is connected to the plastic overclad tube and closes the first opening, and a second end of the probe electrical lead extends out of the plastic overclad tube.
4. The system of claim 3, wherein the probe further comprises a filling layer and a supporting frame, the filling layer is disposed in the cavity of the plastic overclad tube, at least a portion of the probe electrical conductor and the wire end are embedded in the filling layer, the filling layer is spaced apart from the metal sheet to be tested, the supporting frame is disposed in the cavity of the plastic overclad tube and connects the filling layer and the metal sheet to be tested, and the plastic overclad tube, the supporting frame, the metal sheet to be tested and the filling layer together form a detection cavity for accommodating the detection end.
5. The in-concrete rebar corrosion monitoring system of claim 4, wherein the monitoring probe further comprises a bond pad, at least a portion of the bond pad being pre-embedded in the filler layer, the bond pad having a wire groove for receiving the probe electrical wire.
6. The in-concrete rebar corrosion monitoring system of claim 5, wherein the bond pad comprises a vertical section and a horizontal section that are connected, the vertical section being pre-embedded in the filler layer, the horizontal section being connected to the base;
The monitoring probe further comprises an external lead-out wire, the horizontal section is used for guiding the external lead-out wire, a pin of the external lead-out wire is connected with the second end of the probe electric wire, and the external lead-out wire is connected with the data acquisition instrument.
7. The system for monitoring corrosion of steel bars in concrete according to claim 1 or 2, wherein the material of the metal sheet to be tested is the same as the material of the steel bars.
8. A method for monitoring corrosion of steel bars in concrete based on the system for monitoring corrosion of steel bars in concrete according to any one of claims 1 to 7, comprising the steps of:
the base and the monitoring probe are buried in the concrete protective layer, and the second end of the probe electric wire is connected with the data acquisition instrument;
the data acquisition instrument acquires data once every set time, when the data acquisition instrument acquires data, the optical probe emits optical signals, irradiates a monitoring surface of a metal sheet to be detected, acquires corrosion area data of the monitoring surface, and feeds the corrosion area data back to the data acquisition instrument;
and analyzing the corrosion area data by the data acquisition instrument, and considering that the monitoring probe is corroded after the corrosion area exceeds 50% of the area of the monitoring surface, or else, the monitoring probe is not corroded.
9. The method for monitoring corrosion of steel bars in concrete according to claim 8, wherein a plurality of monitoring probes are arranged at equal intervals and in a same line along the extending direction of the base, the heights of the plurality of monitoring probes are gradually increased one by one, and the difference value of the heights of any two adjacent monitoring probes is equal;
and analyzing the corrosion area data by the data acquisition instrument, and after the corrosion area exceeds 50% of the area of the monitoring surface, regarding as the corrosion of the monitoring probe, otherwise, the step of not corroding further comprises the step of analyzing the corrosion area data of the detected metal sheet acquired by the monitoring probe at each position by the data acquisition instrument, namely, early warning the corrosion of the steel bar to be detected in advance in the development process of the corrosion of the concrete protection layer by the external corrosion.
10. A monitoring probe, comprising:
The metal sheet to be tested is provided with a monitoring surface;
The optical probe is provided with a detection end and a connecting end, the detection end is positioned below the monitoring surface, and the detection end is used for emitting optical signals and irradiating the monitoring surface to acquire corrosion area data; and
And the first end of the probe electric wire is connected with the connecting wire end, and the second end of the probe electric wire is used for being connected with a data acquisition instrument.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410210601.9A CN118243612A (en) | 2024-02-26 | 2024-02-26 | Monitoring system, monitoring method and monitoring probe for corrosion of steel bars in concrete |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410210601.9A CN118243612A (en) | 2024-02-26 | 2024-02-26 | Monitoring system, monitoring method and monitoring probe for corrosion of steel bars in concrete |
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| CN118243612A true CN118243612A (en) | 2024-06-25 |
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| CN202410210601.9A Pending CN118243612A (en) | 2024-02-26 | 2024-02-26 | Monitoring system, monitoring method and monitoring probe for corrosion of steel bars in concrete |
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| Country | Link |
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| CN (1) | CN118243612A (en) |
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- 2024-02-26 CN CN202410210601.9A patent/CN118243612A/en active Pending
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