CN218995261U

CN218995261U - Nondestructive testing device for concrete filled steel tube excitation sound measurement

Info

Publication number: CN218995261U
Application number: CN202222921583.4U
Authority: CN
Inventors: 林佳铭; 王水良; 李景鸿; 招继杰; 潘俊广
Original assignee: Shanghai Construction No 5 Group Co Ltd
Current assignee: Shanghai Construction No 5 Group Co Ltd
Priority date: 2022-11-03
Filing date: 2022-11-03
Publication date: 2023-05-09
Anticipated expiration: 2032-11-03

Abstract

The utility model relates to a steel pipe concrete excitation sound nondestructive testing device, which comprises an excitation hammer, a tripod, a clamping device, a sound collecting module and a signal processing and displaying module, wherein the excitation hammer is arranged on a steel pipe concrete member and can knock a measuring point of the steel pipe concrete member; the tripod is supported on the ground, the sound collecting module is detachably arranged on the tripod through the clamping device, and the sound collecting module is not contacted with the steel pipe concrete member; the sound collection module is in signal connection with the signal processing and displaying module. According to the utility model, the hammering excitation is applied to the surface of the steel pipe concrete structure by adopting the exciting hammer, so that the influence caused by manual hammering is avoided; collecting sound generated by vibration by adopting a sound collecting module, and converting sound signals into electric signals; and processing the electric signals through a signal processing and displaying module and displaying the measurement result, thereby obtaining the internal defect condition of the concrete filled steel tube.

Description

Nondestructive testing device for concrete filled steel tube excitation sound measurement

Technical Field

The utility model relates to the field of steel tube concrete defect detection, in particular to a steel tube concrete excitation sound detection nondestructive detection device.

Background

The steel pipe concrete structure is widely applied to high-rise buildings and super high-rise buildings due to good stress performance. However, due to the reasons of irregular construction or shrinkage of concrete, defects such as void, cavity, crack and the like easily occur in the steel tube concrete structure. In the existing engineering, a manual knocking method, a core pulling sampling method and the like are generally adopted to detect defects of the concrete filled steel tube structure. The core-pulling sampling method needs to damage the concrete-filled steel tube structure, and influences the construction quality; the manual knocking rule is to apply hammering excitation to the steel pipe concrete member and judge the quality of concrete pouring according to sound reverberations, and the method is wider in application due to the fact that the method adopts a nondestructive mode. However, the existing manual knocking method is very dependent on experience of staff in the use process, detection results are greatly affected by artificial factors, and detection accuracy is very limited.

Therefore, how to provide a steel pipe concrete excitation sound detection nondestructive testing device capable of avoiding errors caused by human factors and further improving the accuracy of a detection result is a technical problem to be solved by the person skilled in the art.

Disclosure of Invention

The utility model provides a steel tube concrete excitation sound nondestructive testing device, which aims to solve the problems that the existing testing mode is greatly influenced by human factors, is not standard and has low identification accuracy.

In order to solve the technical problems, the utility model provides a steel tube concrete excitation sound measurement nondestructive testing device, which comprises an excitation hammer, a tripod, a clamping device, a sound collecting module and a signal processing and displaying module, wherein,

the exciting hammer is arranged on the steel pipe concrete member and can strike a measuring point of the steel pipe concrete member;

the tripod is supported on the ground, the sound collecting module is detachably arranged on the tripod through the clamping device, and the sound collecting module is not contacted with the steel pipe concrete member;

the sound collection module is in signal connection with the signal processing and displaying module.

Preferably, the exciting hammer is an electric exciting hammer.

Preferably, the tripod is height-adjustable.

Preferably, the sound collection module employs a microphone or a sound recording device.

Preferably, the plurality of sound collecting modules are distributed around the vibration hammer through one or more clamping devices.

Preferably, the sound collection module is connected with the signal processing and display module through a signal transmission line.

Preferably, the signal transmission line adopts a BNC signal transmission line.

Preferably, the signal processing and displaying module adopts an oscilloscope or a computer with signal processing software.

Preferably, the processing software in the computer with the signal processing software is matlab software or LabVIEW software.

Compared with the prior art, the steel tube concrete excitation sound nondestructive testing device provided by the utility model has the following advantages:

1. according to the utility model, the hammering excitation is applied to the surface of the steel pipe concrete structure by adopting the exciting hammer, so that the influence caused by manual hammering is avoided; collecting sound generated by vibration by adopting a sound collecting module, and converting sound signals into electric signals; processing the electric signal through a signal processing and displaying module and displaying the measurement result, thereby obtaining the internal defect condition of the concrete filled steel tube;

2. the converted electric signals have a storage function, can store and compare and analyze data of a large number of measuring points, and establish an actual measurement or experiment database; based on accumulation of the actual measurement or experiment database, the detection precision can be further improved;

3. based on the storability of the detection data, the same structure can be detected in different periods by using the method, the detection results in different periods are compared, the change condition of the health state of the structure is analyzed, the change trend of the health state of the structure is obtained, and the non-real-time health monitoring system of the structure is established, so that the method is a great improvement on the existing method;

4. the device provided by the utility model has the advantages of economy, flexibility, convenience, applicability and developability, and is easy to popularize and use.

Drawings

FIG. 1 is a schematic structural diagram of a concrete filled steel tube excitation sound nondestructive testing device in an embodiment of the utility model.

In the figure: 1-vibration hammer, 2-sound collection module, 3-clamping device, 4-signal transmission line, 5-tripod, 6-signal processing and display module, 7-steel pipe concrete component.

Detailed Description

In order to describe the technical solution of the above utility model in more detail, the following specific examples are listed to demonstrate technical effects; it is emphasized that these examples are illustrative of the utility model and are not limiting the scope of the utility model.

The utility model provides a steel tube concrete excitation sound nondestructive testing device, which is shown in figure 1, and comprises an excitation hammer 1, a tripod 5, a clamping device 3, a sound collecting module 2 and a signal processing and displaying module 6, wherein:

the exciting hammer 1 is mounted on the steel pipe concrete member 7, and can strike a measuring point of the steel pipe concrete member 7. According to the method, hammering excitation is applied to the surface of the concrete filled steel tube member 7 through the exciting hammer 1, the excitation causes vibration of a structure, the vibration propagates in the air in the form of sound waves, the exciting hammer 1 replaces manual hammer taking for hammering, and the influence caused by manual hammering can be avoided.

The tripod 5 is supported on the ground (or other firm plane), the sound collection module 2 is detachably mounted on the tripod 5 through the clamping device 3, and the sound collection module 2 is not contacted with the steel pipe concrete member 7. The sound collection module 2 is arranged nearby the measuring point through the tripod 5 and is not contacted with the surface of the structure, so that measuring errors caused by the fact that sound waves are transmitted to the sound collection module 2 through the steel pipe wall are avoided.

The sound collection module 2 is in signal connection with the signal processing and display module 6. The sound collection module 2 can collect sound generated by vibration, convert sound signals into electric signals, process the electric signals through the signal processing and display module 6 and display measurement results, and then the internal defect condition of the concrete filled steel tube can be obtained.

By adopting the structure, the device can avoid errors caused by human factors, improve the accuracy of detection results and promote standardized application of a knocking method in nondestructive testing of concrete filled steel tube.

In some embodiments, please continue to refer to fig. 1, the damper 1 is an electric damper, so as to ensure the controllability of the hammering force, so as to further reduce human error.

In some embodiments, please continue to refer to fig. 1, the tripod 5 is adjustable in height to accommodate measurement of the measuring points at different heights. In some embodiments, the tripod 5 may be made of telescopic legs, and of course, the height of the tripod 5 may also be adjusted by adjusting the opening and closing degree of the tripod 5. In addition, the position, angle and state of the sound collection module 2 can be flexibly adjusted in cooperation with the position movement and angle (for example, angle on the horizontal plane) adjustment of the tripod 5 and the angle (for example, pitch angle) adjustment of the clamping device 3.

In some embodiments, please continue to refer to fig. 1, the sound collection module 2 may employ a microphone or a sound recording device (e.g., a sound recorder), but other devices with sound collection function (e.g., a mobile phone) may also be employed. When the recording equipment is adopted, the signal processing and display module 6 does not need to be connected on site, and the information collected by the sound collection module 2 can be processed and analyzed through corresponding instruments or software in the later period, so that the flexibility and convenience are higher.

In some embodiments, the number of the sound collection modules 2 may be multiple, and the multiple sound collection modules 2 are respectively distributed around the exciting hammer 1 through one or more clamping devices 3, so that sounds at different positions are collected when a single measuring point is hammered, and the overall health condition of the structure can be completely mastered through multi-point detection. In addition, the sound characteristics of different positions around each measuring point can be collected, and the detection error can be reduced by detecting for many times or arranging a plurality of sound collecting modules 2, so that the detection accuracy is further improved.

In some embodiments, please continue to refer to fig. 1, the sound collection module 2 is connected to the signal processing and display module 6 through a signal transmission line 4, so as to facilitate the plug-in connection. In some embodiments, the signal transmission line 4 may employ a BNC (connector for coaxial cable) signal transmission line to reduce interference between signals.

In some embodiments, the signal processing and displaying module 6 may be an oscilloscope or a computer with signal processing software, and other apparatuses with signal processing and displaying functions may be selected to improve the applicability of the apparatus. In some embodiments, the processing software in the computer with signal processing software may be matlab software, or may use NI test equipment and LabVIEW software in combination, so as to perform program development and optimization for sound signal processing, and have better developability.

It should be noted that, the signal processing and displaying module 6 may display the signal on the display in the form of a waveform time chart, and may perform fourier transform on the signal through instrument operation or software programming, convert the waveform time chart into a spectrogram, further determine the main frequency of the signal through the spectral characteristics of sound, and determine the internal defect of the steel pipe concrete by combining the waveform time chart and the spectrogram. For example, when the frequency and amplitude of the oscillogram are lower, the characteristic of clunky sound wave vibration is reflected, which indicates that the concrete filled steel tube has better quality; when the frequency and the amplitude of the waveform diagram are higher and waveform overlapping exists, the characteristic of crisp and reverberated sound wave vibration is reflected, and the defect exists in the steel tube concrete.

In addition, another great advantage of the present application is that the detected signals can be stored. In practical application, the signal characteristics of the steel pipe concrete under the corresponding working conditions and the signal characteristics of the steel pipe concrete under the different defect expression forms can be determined based on hammering experiments and actual measurement of the steel pipe concrete members 7 with different cross sections, different material characteristics and different defect forms. After a large amount of actual measurement and experimental data are accumulated, the relation between the defect condition and the signal waveform characteristics can be analyzed based on the actual measurement and experimental data, and the corresponding relation between the waveform characteristics and the defect characteristics is established, so that the health state of the concrete filled steel tube is accurately judged through the signal characteristics of the measuring points, the detection accuracy and the detection efficiency of the method are further improved, and the standardization of the detection process is promoted. Meanwhile, when the same structure is detected for multiple times in different periods, a health state development database of the structure can be established, the health state of the structure in different periods can be known, and the change trend of the health state of the structure can be analyzed, so that the subsequent health state development of the structure can be predicted.

In summary, the steel pipe concrete excitation sound nondestructive testing device provided by the utility model comprises the excitation hammer 1, the tripod 5, the clamping device 3, the sound collecting module 2 and the signal processing and displaying module 6, wherein the excitation hammer 1 is arranged on the steel pipe concrete member 7 and can strike the measuring point of the steel pipe concrete member 7; the tripod 5 is supported on the ground, the sound collecting module 2 is detachably arranged on the tripod 5 through the clamping device 3, and the sound collecting module 2 is not contacted with the steel pipe concrete member 7; the sound collection module 2 is in signal connection with the signal processing and display module 6. By adopting the structure, the device can avoid errors caused by human factors, improve the accuracy of detection results and promote standardized application of a knocking method in nondestructive testing of concrete filled steel tube.

It will be apparent to those skilled in the art that various modifications and variations can be made to the present utility model without departing from the spirit or scope of the utility model. Thus, it is intended that the present utility model also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.

Claims

1. The steel pipe concrete excitation sound nondestructive testing device is characterized by comprising an excitation hammer, a tripod, a clamping device, a sound collecting module and a signal processing and displaying module, wherein,

2. The concrete filled steel tube vibration acoustic nondestructive testing device according to claim 1, wherein the vibration hammer is an electric vibration hammer.

3. The concrete filled steel tube excitation sound non-destructive testing device according to claim 1, wherein the tripod is height-adjustable.

4. The concrete filled steel tube excitation sound non-destructive testing device according to claim 1, wherein the sound collecting module adopts a microphone or a recording device.

5. The steel pipe concrete excitation sound nondestructive testing device according to claim 1, wherein the number of the sound collecting modules is plural, and the plurality of the sound collecting modules are correspondingly distributed around the exciting hammer through one or more clamping devices.

6. The concrete filled steel tube excitation sound non-destructive testing device according to claim 1, wherein the sound collecting module is connected with the signal processing and displaying module through a signal transmission line.

7. The concrete filled steel tube excitation sound non-destructive testing device according to claim 6, wherein the signal transmission line is a BNC signal transmission line.

8. The concrete filled steel tube excitation sound non-destructive testing device according to claim 1, wherein the signal processing and displaying module adopts an oscilloscope or a computer with signal processing software.

9. The concrete filled steel tube excitation sound nondestructive testing device according to claim 8, wherein the processing software in the computer with signal processing software is matlab software or LabVIEW software.