CN116147547A - Nondestructive testing system for detecting depth of concrete opening crack - Google Patents
Nondestructive testing system for detecting depth of concrete opening crack Download PDFInfo
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- CN116147547A CN116147547A CN202310164462.6A CN202310164462A CN116147547A CN 116147547 A CN116147547 A CN 116147547A CN 202310164462 A CN202310164462 A CN 202310164462A CN 116147547 A CN116147547 A CN 116147547A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B17/00—Measuring arrangements characterised by the use of infrasonic, sonic or ultrasonic vibrations
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/04—Analysing solids
- G01N29/045—Analysing solids by imparting shocks to the workpiece and detecting the vibrations or the acoustic waves caused by the shocks
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/04—Analysing solids
- G01N29/07—Analysing solids by measuring propagation velocity or propagation time of acoustic waves
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/34—Generating the ultrasonic, sonic or infrasonic waves, e.g. electronic circuits specially adapted therefor
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/01—Indexing codes associated with the measuring variable
- G01N2291/011—Velocity or travel time
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/02—Indexing codes associated with the analysed material
- G01N2291/023—Solids
- G01N2291/0232—Glass, ceramics, concrete or stone
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- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
Abstract
The invention provides a nondestructive testing system for detecting the depth of a concrete opening crack, wherein a first acceleration sensor and a second acceleration sensor are connected with testing equipment; a first acceleration sensor and a second acceleration sensor; the second acceleration sensor is fixedly connected with the exciting hammer; the first acceleration sensor and the exciting hammer are symmetrically arranged at two sides of an opening crack of the concrete to be tested; the exciting hammer is used for knocking a beam body concrete structure where the opening crack of the concrete to be detected is located by adopting different preset intervals; the preset distance is the distance between the exciting hammer and the crack of the opening of the concrete to be tested; the detection equipment is used for collecting acceleration signals of the first acceleration sensor and the second acceleration sensor, and determining the crack depth, the elastic wave velocity and the crack inclination angle of the crack of the concrete opening to be detected based on a parameter regression method. The invention can rapidly and effectively detect the depth of the concrete opening crack, effectively improve the engineering detection efficiency and comprehensively improve the detection precision.
Description
Technical Field
The invention relates to the technical field of nondestructive testing, in particular to a nondestructive testing system for detecting the depth of a concrete opening crack.
Background
Concrete is the most commonly used building material in infrastructure construction, and is used in large quantities in infrastructure construction of roads, bridges, tunnels, dams, building structures, and the like. Cracks are inevitably formed in the concrete structure during construction or long-term use, and if the cracks of the concrete structure cannot be found and repaired in time, the damage of the structure is aggravated. When the depth and width of the crack exceed the critical limits borne by the concrete structure, the external appearance and the normal use of the concrete structure are affected, and even serious safety accidents are possibly caused, so that unnecessary losses are caused. Therefore, the detection and prevention of concrete cracks is of great significance in maintaining the stability of the concrete structure and prolonging the service life.
Aiming at concrete crack detection, the traditional manual visual detection is mainly adopted in early stage, and the method is simple to operate, is time-consuming and labor-consuming and has high requirement on experience of technicians. The manual detection method is also easily influenced by subjective factors of technicians, so that the accuracy of the measurement result is not high. And when detecting on traffic roads such as highways and bridges, normal traffic operation is affected, and life safety of staff is possibly endangered.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide a nondestructive testing system for detecting the depth of a concrete opening crack.
In order to achieve the above object, the present invention provides the following solutions:
a nondestructive testing system for testing the depth of a concrete opening crack, comprising: the device comprises a first acceleration sensor, a second acceleration sensor, detection equipment and an excitation hammer;
the first acceleration sensor and the second acceleration sensor are connected with the detection equipment; the first acceleration sensor and the second acceleration sensor; the second acceleration sensor is fixedly connected with the exciting hammer; the first acceleration sensor and the exciting hammer are symmetrically arranged at two sides of an opening crack of the concrete to be detected; the exciting hammer is used for knocking a beam body concrete structure where the opening crack of the concrete to be detected is located by adopting different preset intervals; the preset distance is the distance between the exciting hammer and the crack of the opening of the concrete to be tested; the detection equipment is used for collecting acceleration signals of the first acceleration sensor and the second acceleration sensor, and determining the crack depth, the elastic wave velocity and the crack inclination angle of the crack of the concrete opening to be detected based on a parameter regression method.
Preferably, the first acceleration sensor is an S31SC acceleration sensor.
Preferably, the second acceleration sensor is an S305M acceleration sensor.
Preferably, the detection device includes, but is not limited to, an ultra-thin notebook industrial host; the ultrathin notebook industrial host is internally provided with a data acquisition system and a data analysis system.
Preferably, the ultrathin notebook industrial host is connected with the first acceleration sensor and the second acceleration sensor through DH lines respectively.
Preferably, the hammer head of the exciting hammer is made of metal; and the knocking position of the exciting hammer is on the vertical plane of the crack of the opening of the concrete to be detected.
Preferably, the preset spacing includes 0.1m,0.2m, and 0.3m.
According to the specific embodiment provided by the invention, the invention discloses the following technical effects:
the invention provides a nondestructive testing system for testing the depth of a concrete opening crack, which comprises the following components: the device comprises a first acceleration sensor, a second acceleration sensor, detection equipment and an excitation hammer; the first acceleration sensor and the second acceleration sensor are connected with the detection equipment; the first acceleration sensor and the second acceleration sensor; the second acceleration sensor is fixedly connected with the exciting hammer; the first acceleration sensor and the exciting hammer are symmetrically arranged at two sides of an opening crack of the concrete to be detected; the exciting hammer is used for knocking a beam body concrete structure where the opening crack of the concrete to be detected is located by adopting different preset intervals; the preset distance is the distance between the exciting hammer and the crack of the opening of the concrete to be tested; the detection equipment is used for collecting acceleration signals of the first acceleration sensor and the second acceleration sensor, and determining the crack depth, the elastic wave velocity and the crack inclination angle of the crack of the concrete opening to be detected based on a parameter regression method. The invention can rapidly and effectively detect the depth of the concrete opening crack, effectively improve the engineering detection efficiency and comprehensively improve the detection precision.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions of the prior art, the drawings that are needed in the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a system structure according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a layout of a test line according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of the principle of estimating the direction of crack propagation according to an embodiment of the present invention;
FIG. 4 is a schematic view of a exciting hammer according to an embodiment of the present invention;
fig. 5 is a graph of test results provided by an embodiment of the present invention.
Reference numerals illustrate:
1-a first acceleration sensor, 2-a second acceleration sensor, 3-a vibrating hammer, 4-a crack of a concrete opening to be detected and 5-detection equipment.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the present application. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.
The terms "first," "second," "third," and "fourth" and the like in the description and in the claims of this application and in the drawings, are used for distinguishing between different objects and not for describing a particular sequential order. Furthermore, the terms "comprise" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion. For example, inclusion of a list of steps, processes, methods, etc. is not limited to the listed steps but may alternatively include steps not listed or may alternatively include other steps inherent to such processes, methods, products, or apparatus.
The invention aims to provide a nondestructive testing system for detecting the depth of a concrete opening crack, which can rapidly and effectively detect the depth of the concrete opening crack, effectively improve the engineering detection efficiency and comprehensively improve the detection precision.
In order that the above-recited objects, features and advantages of the present invention will become more readily apparent, a more particular description of the invention will be rendered by reference to the appended drawings and appended detailed description.
Fig. 1 is a schematic diagram of a system structure provided by an embodiment of the present invention, and as shown in fig. 1, the present invention provides a nondestructive testing system for testing a crack depth of a concrete opening, including: a first acceleration sensor 1, a second acceleration sensor 2, a detection device 5 and an excitation hammer 3;
the first acceleration sensor 1 and the second acceleration sensor 2 are both connected to the detection device 5; the first acceleration sensor 1 and the second acceleration sensor 2; the second acceleration sensor 2 is fixedly connected with the exciting hammer 3; the first acceleration sensor 1 and the exciting hammer 3 are symmetrically arranged at two sides of an opening crack 4 of the concrete to be tested; the exciting hammer 3 is used for knocking a beam body concrete structure where the opening crack 4 of the concrete to be detected is located by adopting different preset intervals; the preset distance is the distance between the exciting hammer 3 and the opening crack 4 of the concrete to be tested; the detection device 5 is used for collecting acceleration signals of the first acceleration sensor 1 and the second acceleration sensor 2, and determining the crack depth, the elastic wave velocity and the crack inclination angle of the crack 4 of the concrete opening to be detected based on a parameter regression method.
The first acceleration sensor 1 adopts an S31SC acceleration sensor, the second acceleration sensor 2 adopts an S305M acceleration sensor, and the frequency response range is wide, so that the current test requirement can be met; the second acceleration sensor 2 is connected with the exciting hammer 3 through a screw; the detection equipment 5 adopts an ultrathin notebook industrial host, comprises a data acquisition system and a data analysis system, and is connected with the first acceleration sensor 1 and the second acceleration sensor 2 through DH lines, so that the stability of signal transmission is improved; the beam body concrete structure part is the position that excitation hammer 3 was beaten when the system gathered the signal, and excitation hammer 3 tup adopts the metal material, can prevent effectively that the dynamics of beating from to gathering signal quality's influence, and the position that excitation hammer 3 was beaten should be in the cracked perpendicular of concrete opening, and is in symmetrical position with first acceleration sensor 1, in order to ensure vibration signal's quality, beat every turn interval time should not be less than 2 seconds.
The concrete open crack test and detection steps are as follows:
1. the sensor and the detecting device 5 are physically connected, and as shown in fig. 2 and 3, the sensor adopts an S31SC acceleration sensor, which is placed perpendicular to the opening slit.
2. The knocking excitation is as shown in fig. 4, the knocking hammer head is made of metal, the knocking strength is moderate, and the influence on the signal acquisition quality is prevented. And the knocking position is symmetrical to the sensor along the crack direction.
3. The data acquisition and storage, the acquisition system built-in the ultrathin industrial host has continuous acquisition function, can realize automatic data storage in the acquisition process, is not easy to trigger by mistake, effectively improves the data acquisition efficiency, and needs to ensure effective data storage in the acquisition process.
4. At least 3 conditions (L is 0.1m,0.2m,0.3m and L can be changed according to the same multiple according to the situation) are tested to obtain the propagation time difference of the signal at the crack when the crack depth is tested. The excitation end and the sensor are symmetrically arranged.
5. And (5) data analysis. And carrying out parameter regression calculation through the background of the acquired data to obtain equation relation of the time of the elastic wave passing through the same crack under three distances, thereby effectively obtaining the crack depth, the elastic wave speed and the crack inclination angle.
As an alternative implementation manner, in this example, a concrete opening crack is tested on site, and the excitation end and the sensor are symmetrically arranged relative to the crack and have a distance L (L has a value of 0.1m,0.2m and 0.3 m). After the corresponding interval data are respectively adopted, the analysis can obtain the test result shown in figure 5.
The beneficial effects of the invention are as follows:
the invention uses the correction propagation time difference method, does not need to test the wave velocity, and is applicable to narrow places. The 3-point regression can also be used to estimate the direction of crack propagation (the direction of crack propagation is estimated using the change in natural frequency and R-wave velocity).
In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other.
The principles and embodiments of the present invention have been described herein with reference to specific examples, the description of which is intended only to assist in understanding the methods of the present invention and the core ideas thereof; also, it is within the scope of the present invention to be modified by those of ordinary skill in the art in light of the present teachings. In view of the foregoing, this description should not be construed as limiting the invention.
Claims (7)
1. A nondestructive testing system for testing the depth of a concrete opening crack, comprising: the device comprises a first acceleration sensor, a second acceleration sensor, detection equipment and an excitation hammer;
the first acceleration sensor and the second acceleration sensor are connected with the detection equipment; the first acceleration sensor and the second acceleration sensor; the second acceleration sensor is fixedly connected with the exciting hammer; the first acceleration sensor and the exciting hammer are symmetrically arranged at two sides of an opening crack of the concrete to be detected; the exciting hammer is used for knocking a beam body concrete structure where the opening crack of the concrete to be detected is located by adopting different preset intervals; the preset distance is the distance between the exciting hammer and the crack of the opening of the concrete to be tested; the detection equipment is used for collecting acceleration signals of the first acceleration sensor and the second acceleration sensor, and determining the crack depth, the elastic wave velocity and the crack inclination angle of the crack of the concrete opening to be detected based on a parameter regression method.
2. The nondestructive inspection system of claim 1 wherein the first acceleration sensor is an S31SC acceleration sensor.
3. The nondestructive inspection system of claim 1 wherein the second acceleration sensor is an S305M acceleration sensor.
4. The nondestructive testing system for concrete opening crack depth of claim 1 wherein the testing apparatus includes, but is not limited to, an ultra-thin notebook industrial host; the ultrathin notebook industrial host is internally provided with a data acquisition system and a data analysis system.
5. The nondestructive testing system for concrete opening crack depth according to claim 4, wherein the ultra-thin notebook industrial host is connected with the first acceleration sensor and the second acceleration sensor through DH wires, respectively.
6. The nondestructive testing system for testing the depth of a concrete opening crack of claim 1, wherein the hammer head of the exciting hammer is made of metal; and the knocking position of the exciting hammer is on the vertical plane of the crack of the opening of the concrete to be detected.
7. The nondestructive testing system of claim 1, wherein the predetermined spacing comprises 0.1m,0.2m, and 0.3m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310164462.6A CN116147547A (en) | 2023-02-25 | 2023-02-25 | Nondestructive testing system for detecting depth of concrete opening crack |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310164462.6A CN116147547A (en) | 2023-02-25 | 2023-02-25 | Nondestructive testing system for detecting depth of concrete opening crack |
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| CN116147547A true CN116147547A (en) | 2023-05-23 |
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| CN202310164462.6A Pending CN116147547A (en) | 2023-02-25 | 2023-02-25 | Nondestructive testing system for detecting depth of concrete opening crack |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116381051A (en) * | 2023-06-06 | 2023-07-04 | 安徽中铁工程技术有限公司 | Railway bridge tunnel concrete compactness detection device and detection system thereof |
-
2023
- 2023-02-25 CN CN202310164462.6A patent/CN116147547A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116381051A (en) * | 2023-06-06 | 2023-07-04 | 安徽中铁工程技术有限公司 | Railway bridge tunnel concrete compactness detection device and detection system thereof |
| CN116381051B (en) * | 2023-06-06 | 2023-08-25 | 安徽中铁工程技术有限公司 | Railway bridge tunnel concrete compactness detection device and detection system thereof |
| US12105051B1 (en) | 2023-06-06 | 2024-10-01 | China Tiesiju Civil Engineering Group Co., Ltd. | Detection apparatus and detection system for railway bridge duct concrete compactness |
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