17 results about "Rebar corrosion" patented technology

This invention discloses a method and system for identifying apparent damage to bridge concrete based on texture analysis, belonging to the interdisciplinary field of bridge engineering inspection and computer vision technology. The method includes: acquiring surface images of bridge components using a drone and generating orthophotos; extracting contrast, correlation, and entropy features based on the gray-level co-occurrence matrix; extracting histogram features based on local binary patterns; detecting corrosion and seepage areas based on the HSV color space; fusing multi-dimensional features and inputting them into a multi-label classifier, simultaneously outputting pixel-level segmentation masks for multiple types of damage such as cracks, spalling, exposed rebar corrosion, and seepage; generating a damage level score and maintenance recommendation report according to bridge technical condition assessment standards. This invention integrates complementary texture features to achieve simultaneous identification of multiple types of damage, outputs pixel-level segmentation results, and automatically generates an assessment report that conforms to engineering specifications.

The utility model belongs to the technical field of steel bar detection, especially relate to a reinforced concrete structure corrosion remote detection device, including steel bar rust quantitative detector, steel bar rust quantitative detector top end is equipped with support frame, steel bar rust quantitative detector both sides are equipped with X -ray emitter and X -ray detector respectively, support frame middle part is equipped with mounting seat. Through installing X -ray emitter and X -ray detector on steel bar rust quantitative detector, can let the X -ray emitter on steel bar rust quantitative detector emit X -ray, let X -ray shoot to the steel bar surface in the concrete, again through X -ray detector capture the ray of steel bar penetration, and form visual image on the display, again through signal antenna will image emit to remote control center, thereby can fast the steel bar corrosion in reinforced concrete is carried out effective remote detection, need not manual detection of artificial, improved the accuracy and convenience of device detection time.

This invention proposes an intelligent prediction method for performance degradation and durability limit state assessment of reinforced concrete structures, comprising: establishing a probabilistic model of random variables for environmental and structural parameters; constructing an intelligent prediction model for chloride ion diffusion by fusing convolutional neural networks, and using Monte Carlo sampling analysis to analyze the probability distribution of the initial corrosion time of the reinforcing bars to predict the depassivation time of the reinforcing bars; establishing a time-varying corrosion model of the reinforcing bars to obtain the change of the corrosion loss rate of the reinforcing bars over time; further, using an incremental static analysis method, establishing a multi-scale finite element model of the reinforced concrete structure under different corrosion rate conditions through random sampling; obtaining the critical load value under the limit state to obtain the failure probability curve under different corrosion degrees; and finally, by defining a bearing capacity reduction coefficient, obtaining the bearing capacity failure time of the reinforced concrete structure to achieve the durability limit state assessment of the reinforced concrete structure under corrosion.

The application relates to the technical field of civil engineering structure health monitoring, and discloses a reinforcing steel bar corrosion quantitative monitoring method based on an electromagnetic field and a probe type monitoring device, wherein the electromagnetic field is generated by a first probe and a second probe in the probe type monitoring device, and the first probe and the second probe are arranged on the two sides of a target position of a reinforcing steel bar to be measured; the method comprises the following steps: detecting the current magnetic field intensity on the two sides of the target position through the first probe and the second probe, and determining the magnetic field intensity change rate of the current magnetic field intensity relative to a preset reference magnetic field intensity; based on the reinforcing steel bar spacing between the reinforcing steel bar to be measured and an interfering reinforcing steel bar, a sensitivity correction coefficient is determined, and the theoretical sensitivity is corrected based on the sensitivity correction coefficient, wherein the theoretical sensitivity refers to the sensitivity of the magnetic field intensity change on the two sides of the target position to the reinforcing steel bar corrosion when the reinforcing steel bar is not interfered by the interfering reinforcing steel bar; and based on the magnetic field intensity change rate and the corrected sensitivity, the corrosion rate of the target position is determined. The application can achieve the technical effect of improving monitoring precision.

The application discloses a kind of optical fiber grating sensor device and calibration test method for marine steel bar corrosion monitoring, by providing a kind of specially designed for marine environment, based on the non-contact magnetic strain principle optical fiber grating sensor device, the device is packaged with full silicon-based material, fundamentally solve long-term corrosion problem;With magnetic non-contact sensing corrosion, avoid the interference caused by direct contact;Through symmetric double-end design, improve reliability and signal quality;Compact structure, easy to install.The application also provides calibration test method matched with the sensor device, by simulating the accelerated electrochemical corrosion test of marine corrosion environment, accurately establish the quantitative mathematical model between sensor output signal and the actual mass loss of steel bar, so as to give the quantitative monitoring ability of sensor, and provide calibration basis for the consistency of different batches of sensors.

This utility model discloses a device for detecting steel corrosion in concrete, belonging to the field of steel reinforcement detection technology. The device further includes detection clamps fixedly connected to the other end of each cable; a pair of detection clamps are rotatably connected; a sheath is fitted on the side of the detection clamp closest to the detector; a terminal is provided at the end of the detection clamp away from the detector to facilitate signal transmission back to the detector; two pairs of conductive wires are equally spaced on the inner side of the detection clamps; the corresponding terminals, conductive wires, cables, and detector are all electrically connected; by setting two detection clamps and rotatably connecting them to form a clamp-shaped detection rod, it is easier to control the opening angle of the two terminals and to quickly adjust the detection spacing, thus improving detection efficiency.

This invention provides a wireless electromagnetic induction probe device for detecting steel bar corrosion, belonging to the field of steel bar corrosion detection technology. The device includes a base, a bracket fixedly connected to the top of the base, a T-shaped movable seat inside the bracket, and a mounting hole inside the T-shaped movable seat. A second motor is fixedly installed inside the mounting hole, and a rotating shaft is fixedly connected to the drive shaft of the second motor. One end of the rotating shaft is welded to the end side of a fixed frame. A third motor is fixedly connected inside the fixed frame, and a one-way lead screw is welded to the drive shaft of the third motor. This invention, by operating three sets of motors, allows the wireless electromagnetic induction detector to expand its movement range, thereby further expanding the detection range on the wall surface. This eliminates the need for frequent movement of the entire device, reduces operational procedures, and improves detection efficiency.

This invention relates to the field of concrete durability testing technology, specifically to a concrete life analysis system and method for saline environments. The system includes: an environmental simulation module configured to perform immersion-drying cycles on concrete specimens and create a corrosive environment; a parameter acquisition module used to detect the relative dynamic elastic modulus and pore size distribution data of the concrete under load; a concentration analysis module configured to calculate the chloride ion concentration on the concrete surface based on the diffusion law; and a life prediction module used to generate life analysis results based on the effective thickness of the protective layer and the critical value of steel reinforcement corrosion. This invention solves the problem of traditional methods' difficulty in accurately simulating the high-concentration corrosive ion environment of saline soil by constructing a comprehensive analysis model that includes immersion-drying cycles and chloride ion diffusion. It effectively integrates the influence of load, temperature, and carbonation factors on concrete, achieving a precise quantitative assessment of the durability of the outer concrete layer of PCCP pipes under specific saline environments.

This invention belongs to the field of rebar detection technology, specifically relating to a rebar corrosion detection device and a method for detecting corrosion on the surface of rebar. It includes a detection host with rebar clamps and electrode rods respectively disposed on both sides, and further includes: a housing slidably fitted around the electrode rods; an auxiliary mechanism including a displacement sensing component mounted on the housing, a differential compensation component connected to the displacement sensing component, and a resistance adjustment component mounted on the differential compensation component; and a marking mechanism including a liquid delivery unit, a liquid spraying unit, a liquid injection unit, and a control unit mounted on the housing. The control unit drives the liquid delivery unit to operate, causing ink to be sprayed from the liquid spraying unit for marking. This invention, through structural optimization, dynamic compensation, and integrated marking, achieves three major benefits: ease of operation, accurate measurement, and efficient marking, significantly improving the technical level of rebar corrosion detection.

The application discloses a method for reinforcing bar corrosion thermodynamic map inversion and three-dimensional quantification based on a weakly supervised state space model, constructs a parallel high-resolution feature extraction network based on a Mamba mechanism, proposes an inversion positioning method based on weak supervision (image-level label), and establishes a physical quantification process of "thermodynamic map inversion-boundary refining-three-dimensional mapping". The application improves the limit capturing capacity of micro-point corrosion and the anti-interference capacity in a complex environment, realizes physical-level fine fitting of a corrosion boundary, and is more accurate in reinforcing bar corrosion identification.

This invention discloses a method for improving the durability of ready-mixed concrete based on modified aggregates, belonging to the field of building materials technology. It aims to solve the problems of poor durability in existing ready-mixed concrete using porous aggregates, such as chloride ion penetration, freeze-thaw damage, and steel corrosion due to the high porosity and strong water absorption of the aggregates. The method includes: immersing the porous aggregates in a functional impregnation liquid prepared from a rust inhibitor and nano-silica or silica sol, allowing the impregnation liquid to fully fill the aggregate pores; after drying, immersing them in a molten low-melting-point sealing material; while the sealing layer is not completely cooled, sprinkling a layer of fine sand onto the aggregate surface to obtain modified aggregates; and then mixing the modified aggregates with cement, fine aggregates, water, and admixtures to replace part or all of the coarse aggregates to obtain ready-mixed concrete. Through the synergistic effect of vacuum impregnation and filling combined with the surface sealing of the low-melting-point material, the functional components are effectively locked in and the penetration channels of corrosive media are blocked, significantly improving the concrete's resistance to chloride ion penetration.

The utility model provides a kind of tunnel lining reinforcing bar corrosion condition detection device, including base, be provided with screw block group on base, first screw rod one end is equipped with hand wheel, be provided with lifting assembly on screw block group, lifting assembly includes support seat, support seat bottom is connected with the slider of screw block group, lifting assembly top is provided with lifting plate, lifting plate top is provided with adjusting assembly and corrosion detector, be provided with detection assembly on adjusting assembly, detection assembly includes mounting plate, mounting plate is arc, rotating shaft is provided with in mounting plate both sides, adjusting assembly package has multiple electric cylinders, electric cylinder tail end is equipped in rotating shaft, two groups of push rod are provided on base, push rod is installed in first screw rod both ends.The device passes through lifting assembly, the lifting of detection assembly is realized, improves the ability of device detection different height reinforcing bar;The device passes through adjusting assembly, reach the purpose of adjusting detection angle and position, increase the applicability of detection.

The utility model relates to the field of building construction, in particular to a concrete module integrating the functions of thickness control, steel bar support and cushion block, which comprises a module body, the module body is provided with a support part, and a reinforced concrete protection area is formed between the support part and the end part of the module body. According to the utility model, the module body is provided with the supporting part for placing the steel bar, and the reinforced concrete protection area is formed between the supporting part and the end part of the module body, so that the distance from the outer surface of the steel bar to the edge of concrete can be accurately controlled; the problem that in the actual construction process, the steel bar protective layer cushion block at the bottom of the steel bar split head is prone to slipping and even falling off, so that after concrete pouring is completed, the steel bars are exposed or the thickness of the protective layer is insufficient, and the service life of the steel bars is prolonged is effectively solved. The problem that in the actual construction process, the steel bar protective layer cushion block at the bottom of the steel bar split head is prone to slipping and even falling off is effectively solved. And the problems of steel bar corrosion and concrete cracking are solved.

The application discloses a kind of water transport wharf pile repair reinforcing device and reinforcing method, device includes: inner cylinder, it is surrounded in the outer periphery of pile, and it is formed with filling space between inner cylinder and pile;Inner cylinder is made of first inner half cylinder and second inner half cylinder and is spliced together;Reinforcing mesh frame is installed in the outer peripheral wall of inner cylinder;Outer cylinder, it is surrounded in the outer periphery of inner cylinder and reinforcing mesh frame, and it is formed with pouring space of accommodating reinforcing mesh frame between outer cylinder and inner cylinder, and outer cylinder is made of first outer half cylinder and second outer half cylinder and is spliced together.The application directly installs reinforcing mesh frame in the outer peripheral wall of inner cylinder, so that the installation position of reinforcing mesh frame is more accurate and stable, reduces the assembly difficulty of outer cylinder, guarantees the installation accuracy of reinforcing mesh frame, provides guarantee for the quality of subsequent pouring reinforcement, can effectively repair the concrete surface layer peeling, cracking, reinforcing steel corrosion and other diseases of pile, restores and improves the bearing capacity of pile.

This invention discloses a synchronous detection device for arrayed permanent magnet and electrochemical impedance spectroscopy (EIS) of steel reinforcement corrosion in concrete, belonging to the field of electronic digital data processing technology. It is suitable for non-destructive testing of concrete structure corrosion in structural health assessment. The device includes at least one sub-detection mechanism. Each sub-detection mechanism comprises a unit frame and, from front to back, a permanent magnet probe, a main wheel, an electrical control box, and wheel-type electrodes arranged sequentially on the unit frame. The permanent magnet probe consists of a permanent magnet and a magnetic coil; the wheel-type electrodes consist of a transmitting electrode and a receiving electrode. The electrical control box is communicatively connected to both the permanent magnet probe and the wheel-type electrodes, and consists of an analog wireless acquisition module, an AC impedance analyzer, and electrode control valves. This device uses a permanent magnet perturbation method to identify the spatial distribution of corrosion state, and then combines this with the dynamic feature extraction of the AC polarization impedance method to quantitatively calculate the corrosion current and corrosion rate. The combination of these two methods allows for the synchronous acquisition and integrated assessment of the amount and rate of steel reinforcement corrosion without damaging the concrete structure. This invention also discloses a method for synchronous detection of arrayed permanent magnet and electrochemical impedance spectroscopy (EIS) of steel reinforcement corrosion in concrete.

The present application relates to a kind of based on electrodeless resistivity Reinforced concrete corrosion state detection method, comprising the following steps: the prepared reinforced concrete sample vacuum drying treatment is placed in test device, with electrolyte solution composition series circuit, electrodeless resistivity meter is tested to obtain system total resistance, again test obtains electrolyte solution resistance, the resistance of steel in concrete is obtained by calculation.By the change of steel in concrete in different curing age, the corrosion rate of steel in concrete is calculated, compared with relevant standard, the corrosion state of steel in concrete is obtained.The present application adopts electrodeless non-contact method, eliminates the influence of contact resistance and contact capacitance between electrode and concrete on measurement, will not produce electrode polarization and other problems, it is convenient and fast, the result is expressed in the form of steel corrosion depth rate, the result is more intuitive, consistent with the result of weight loss rate of steel corrosion in the current national standard, the same state of steel is distinguished.

The application belongs to the technical field and particularly relates to a long-mark-length fiber grating concrete carbonation monitoring sensor and a monitoring method. The sensor comprises a first interface, a PH sensor, an optical fiber, a strain sensor and a second interface. The PH sensor and the strain sensor are connected in series through the optical fiber or fusion splicing and are placed side by side at the same position of the concrete structure. The sensor can realize in-situ real-time monitoring of the carbonation degree of the concrete and "prior" prediction of the possibility of the occurrence of the steel bar corrosion through the measurement of the pH value of the concrete. The double-sensor integrated design of the synchronous measurement of the pH value and the strain can simultaneously obtain the strain and the pH value changes caused by the external load. The long-mark-length structure design can increase the contact surface of the pH sensitive hydrogel and the concrete, and the sleeve can ensure that the FBG is uniformly stressed in the mark length and effectively reduces the influence of the local accidental error.