CN213933695U - Concrete defect detection device - Google Patents

Abstract

The utility model provides a concrete defect detection device, device shell and install respectively the magnetostrictive focus and the signal collector on the device shell, the magnetostrictive focus includes insulating sleeve, metal coil, magnetostrictive rod and shock hammer head, metal coil twines on insulating sleeve, magnetostrictive rod is located insulating sleeve, the bottom is connected with the shock hammer head, the cover is equipped with the excitation spring on magnetostrictive rod, its both ends respectively with shock hammer head, vibrations transmission pole butt; the signal collector comprises a damping spring, a piezoelectric sensor, a pulley supporting rod and a pulley, the pulley is hinged to the pulley supporting rod, the piezoelectric sensor is abutted against the pulley supporting rod and fixed above the pulley, the damping spring is sleeved on the pulley supporting rod, and the two ends of the damping spring are abutted against the top ends of the piezoelectric sensor and the pulley supporting rod. The utility model discloses can avoid because of artifical focus energy and the frequency instability that strikes the hammer and arouse, can also make sensor and the good coupling of testee, improve signal SNR.

Description

Concrete defect detection device

Technical Field

The utility model relates to a concrete quality testing technical field, in particular to concrete defect detection device based on seismic waves.

Background

Quality problems such as non-compact areas, cavities, quality of joint surfaces, surface damage and cracks are prone to occur during the construction of hydraulic concrete buildings. For the above problems, only from the appearance inspection and analysis, a correct conclusion cannot be drawn, and the internal quality condition thereof must be detected by a scientific method so as to make a correct judgment. At present, equipment and methods special for detecting hydraulic concrete buildings in the industry are not common, and common detection methods include a seismic mapping method, an ultrasonic transverse wave method and the like. However, each method has its adaptability and limitation, and is not suitable for practical engineering. The specific defects are as follows:

1. the traditional seismic mapping method excites seismic waves through a manual hammer, and the energy and the frequency of each signal are difficult to be ensured to be stable and unchanged. On one hand, when the knocking force paths are different, the obtained seismic wave amplitude is different; on the other hand, the dominant frequency of the seismic wave is related to the contact area between the hammer head and the surface of the measured medium, and when the force paths are different, the contact area is different, so that the dominant frequency of the obtained effective signal changes.

2. When acquiring seismic wave signals, the traditional seismic mapping method mostly adopts manual holding of the sensor to enable the sensor to be tightly attached to the surface of a measured medium, and due to the fact that manual interference easily causes poor coupling between the sensor and the surface of the measured medium, the acquired signals are distorted, and working efficiency is reduced.

3. The traditional seismic mapping method only uses one sensor, and a data processing means can only start from single-channel data, so that the interpretation precision is not high, and the method has great limitation.

4. Although the ultrasonic transverse wave method is an array type sensor, the equipment is heavy, and a plurality of sensors are difficult to couple with the surface of a lining on one hand, and the detection rate is low on the other hand.

Therefore, the existing detection equipment has the defects of heavy instrument and equipment, unstable seismic source energy, low detection efficiency, single data processing method and the like, and the invention of the detection equipment which is convenient, efficient and accurate is urgently needed.

SUMMERY OF THE UTILITY MODEL

In view of the above problem, the utility model aims at providing a concrete defect detecting device who is applicable to hydraulic structure concrete quality detection that detection efficiency is high, data processing is fast, the interpretation precision is high.

In order to achieve the above purpose, the utility model adopts the following specific technical scheme:

the utility model provides a concrete defect detection device, include: the device comprises a device shell, a magnetostrictive seismic source and a signal collector, wherein the magnetostrictive seismic source and the signal collector are respectively arranged on the device shell; the magnetostrictive seismic source comprises an insulating sleeve, a metal coil, a magnetostrictive rod, an excitation spring and a shock-excitation hammer head, wherein the metal coil is wound on the insulating sleeve, the magnetostrictive rod is of a stepped structure and is positioned in the insulating sleeve, the bottom end of the magnetostrictive rod extends out of the insulating sleeve and is connected with the shock-excitation hammer head, the excitation spring is sleeved on the magnetostrictive rod, and two ends of the magnetostrictive rod are respectively abutted to the steps of the shock-excitation hammer head and the shock transmission rod; the signal collector comprises a damping spring, a piezoelectric sensor, a pulley supporting rod and a pulley, the pulley is hinged to the pulley supporting rod through a pulley bearing, the piezoelectric sensor is fixed above the pulley supporting rod and located on the pulley, the damping spring is sleeved on the pulley supporting rod, and two ends of the damping spring are respectively abutted to the top ends of the piezoelectric sensor and the pulley supporting rod.

Preferably, be fixed with the guide rail on the device shell, signal collector still including setting up the slider on pulley bracing piece top, slider and guide rail sliding connection, damping spring's one end and slider butt.

Preferably, the magnetostrictive source further comprises a guide end fixed at the bottom of the insulating sleeve, a through hole is formed in the guide end, and the bottom end of the magnetostrictive rod penetrates through the through hole to be connected with the shock excitation hammer head.

Preferably, the magnetostrictive source further comprises a source housing and a lead connector fixed on the source housing, and the metal coil is connected with the lead connector.

Preferably, a power supply groove is formed in the device shell, a power supply is installed in the power supply groove, a power supply cover covers the power supply groove, and the lead joint is connected with the power supply through a lead.

Preferably, a distance measuring wheel is further mounted on the device shell through a bearing, and a distance measuring sensor is mounted on the distance measuring wheel.

Preferably, a control circuit board is mounted on the device housing, and the distance measuring sensor is connected with the control circuit board through a wire.

Preferably, a power switch for controlling the power supply is mounted on the device housing, and the power switch is connected with the control circuit board through a wire.

Preferably, a handle is provided on the device housing.

Preferably, the concrete defect detection device further comprises a computer, a data interface connected with the piezoelectric sensor and the distance measuring sensor is arranged on the device shell, and the data interface is connected with the computer through a data line.

The utility model discloses can gain following technological effect:

1. the mechanical vibration of the magnetostrictive seismic source can avoid the unstable energy and frequency of the seismic source caused by manually knocking the hammer, and the damping spring can enable the piezoelectric sensor to be well coupled with the surface of the measured object, so that the signal-to-noise ratio of the received signal is improved.

2. By analyzing the two seismic wave signals, data processing can be carried out from a plurality of angles such as a seismic mapping method, a shock echo method, a frequency spectrum analysis method, an SASW method and the like, abnormal signals are comprehensively interpreted, the judgment precision and the accuracy of abnormal defects are greatly improved, meanwhile, the effect of one-time data acquisition and combined interpretation of a plurality of methods is realized, and the detection efficiency is improved.

Drawings

Fig. 1 is a schematic view of the overall structure of a concrete defect detecting apparatus according to an embodiment of the present invention;

fig. 2 is a schematic structural view of a magnetostrictive seismic source according to an embodiment of the invention;

fig. 3 is a schematic structural diagram of a signal collector according to an embodiment of the present invention.

Wherein the reference numerals include: the device comprises a device shell 1, a magnetostrictive seismic source 2, an insulating sleeve 2-1, a metal coil 2-2, a magnetostrictive rod 2-3, an excitation spring 2-4, a shock excitation hammer head 2-5, a shock transmission rod 2-6, a guide end 2-7, a seismic source shell 2-8, a lead connector 2-9, a signal collector 3, a damping spring 3-1, a piezoelectric sensor 3-2, a pulley support rod 3-3, a pulley 3-4, a pulley bearing 3-5, a slider 3-6, a guide rail 4, a power groove 5, a power supply 6, a power supply cover 7, a distance measuring wheel 8, a control circuit board 9, a power switch 10, a handle 11, a data interface 12, a computer 13, a lead 14 and a data line 15.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and do not constitute limitations on the invention.

The concrete defect detecting apparatus provided by the embodiment of the present invention will be described in detail below.

Fig. 1 shows an overall structure of a concrete defect detecting apparatus according to an embodiment of the present invention.

As shown in FIG. 1, the embodiment of the utility model provides a concrete defect detecting device, include: the device comprises a device shell 1, magnetostrictive sources 2 and signal collectors 3, wherein the magnetostrictive sources 2 and the signal collectors 3 are respectively arranged on the device shell 1, the number of the magnetostrictive sources 2 is one, the magnetostrictive sources are used for striking the surface of a measured object to excite seismic waves, and the number of the signal collectors 3 is at least two and the magnetostrictive sources are used for receiving seismic wave signals. The two signal collectors 3 can realize data acquisition of two seismic wave signals, and through analyzing the two seismic wave signals, data processing can be performed from multiple angles such as a seismic mapping method, a shock echo method, a frequency spectrum analysis method, an SASW method and the like, abnormal signals are comprehensively interpreted, the accuracy and the precision of judging abnormal defects are greatly improved, meanwhile, the effect of one-time data acquisition and combined interpretation of multiple methods is realized, and the detection efficiency is improved.

Fig. 2 shows a configuration of a magnetostrictive seismic source according to an embodiment of the invention.

As shown in fig. 2, the magnetostrictive seismic source includes: the device comprises an insulating sleeve 2-1, a metal coil 2-2, a magnetostrictive rod 2-3, an excitation spring 2-4 and a shock-excitation hammer 2-5, wherein the metal coil 2-2 is wound on the insulating sleeve 2-1, the magnetostrictive rod 2-3 is of a stepped structure and is positioned in the insulating sleeve 2-1, the bottom end of the magnetostrictive rod 2-3 extends out of the insulating sleeve 3-1 and is connected with the shock-excitation hammer 2-5, the excitation spring 2-4 is sleeved on the magnetostrictive rod 2-3, and two ends of the excitation spring are respectively abutted to steps of the shock-excitation hammer 2-5 and the shock-excitation transmission rod 2-6.

When the metal coil 2-2 is electrified, a changing magnetic field is generated instantly, the magnetostrictive rod 2-3 can generate larger axial strain under the action of the magnetic field, so that the shock excitation hammer head 2-5 is driven to impact the surface of a measured object to excite seismic waves, and the excitation spring 2-4 is used for ensuring that the magnetostrictive rod 2-3 returns to the original position and driving the shock excitation hammer head 2-5 to leave the surface of the measured object.

The magnetostrictive rods 2-3 can be of an integrated structure or a split structure, and are formed by processing a rod body made of magnetostrictive materials when the magnetostrictive rods are of the integrated structure, and are formed by two rod bodies with different thicknesses, namely magnetostrictive rods 2-3 and a vibration transmission rod 2-6, two ends of the vibration transmission rod 2-6 are respectively connected with the magnetostrictive rods 2-3 and a shock excitation hammer head 2-5, the diameter of the vibration transmission rod 2-6 is smaller than that of the magnetostrictive rods 2-3, and the vibration transmission rod 2-6 can be made of common rigid materials. The vibration transmission rods 2-6 are driven to move up and down by the extension and contraction of the magnetostrictive rods 2-3, so that the vibration exciting hammers 2-5 are driven to move up and down.

In order to facilitate replacement of the shock excitation hammer heads 2-5, the shock transmission rods 2-6 are in threaded connection with the shock excitation hammer heads 2-5, and detachable connection is achieved.

In order to guide the movement of the vibration transmission rod 2-6, the magnetostrictive seismic source further comprises a guide end head 2-7, the guide end head 2-7 is fixed at the bottom of the insulating sleeve 2-1, a through hole is formed in the guide end head 2-7, the top end of the vibration transmission rod 2-6 is located in the insulating sleeve 2-1, the bottom end of the vibration transmission rod downwards penetrates through the through hole of the guide end head 2-7 and then is connected with the shock excitation hammer head 2-5, the excitation spring 2-4 is sleeved on the vibration transmission rod 2-6 and located in the through hole of the guide end head 2-7, one end of the excitation spring 2-4 is abutted against the bottom end of the magnetostrictive rod 2-3, and the other end of the excitation spring 2-4 is abutted against the shock excitation hammer head 2-5.

The magnetostrictive seismic source also comprises a seismic source shell 2-8 and a lead connector 2-9, wherein the insulating sleeve 2-1 is arranged in the seismic source shell 2-8, a groove is formed in the device shell 1, and the seismic source shell 2-8 is fixed in the groove to realize the fixed connection of the magnetostrictive seismic source and the device shell 1.

And a lead connector 2-9 is also fixed on the seismic source shell 2-8, the metal coil 2-2 is connected with the lead connector 2-9, and electricity is led to the metal coil 2-2 through the lead connector 2-9.

Fig. 3 shows a structure of a signal collector according to an embodiment of the present invention.

As shown in fig. 3, the signal collector includes: the vibration detection device comprises a damping spring 3-1, a piezoelectric sensor 3-2, a pulley support rod 3-3 and a pulley 3-4, wherein the pulley 3-4 is hinged to the pulley support rod 3-3 through a pulley bearing 3-5, the piezoelectric sensor 3-2 is fixed on the pulley support rod 3-3 and located above the pulley 3-4 and abutted to the pulley 3-4, a vibration signal is transmitted to the piezoelectric sensor 3-2 to be collected through surface contact of the pulley 3-4 and a measured object, the damping spring 3-1 is sleeved on the pulley support rod 3-3, and two ends of the damping spring 3-1 are respectively abutted to the piezoelectric sensor 3-2 and the top end of the pulley support rod 3-3.

In order to realize the movement of the signal collector, a sliding block 3-6 is fixed at the top end of a pulley supporting rod 3-3, a guide rail 4 is fixed on a device shell 1, and the sliding block 3-6 is sleeved on the guide rail 4 and is in sliding connection with the guide rail 4 to realize the movement of the signal collector so as to change the offset distance (the distance between a magnetostrictive seismic source and a first signal collector) and the track distance (the distance between two signal collectors) to meet the requirements of different detection objects.

The top end of the damping spring 3-1 is abutted against the sliding block 3-6 to provide downward elastic force for the pulley 3-4, the pulley 3-4 can achieve good coupling effect with the surface of the measured object through the elastic force of the damping spring 204, the signal acquired by the piezoelectric sensor 3-2 cannot be distorted, and the signal-to-noise ratio of the received signal is improved.

The piezoelectric sensor 3-2 is preferably a three-component acceleration type sensor.

Referring back to fig. 1, in order to supply power to the metal coil 2-2, a power supply slot 5 is formed in the device housing 1, a power supply 6 is installed in the power supply slot 5, and a power supply cover 7 covers the power supply slot 5. Preferably, the power source 6 is a 12V rechargeable lithium battery, a protruding point is arranged at the front end in the power source slot 5, a spring is arranged at the rear end, the lithium battery is arranged in the battery slot 5 and connected with the protruding point and the spring, a clamping groove is arranged on the device shell 1 corresponding to the position of the power source cover 7, the rear part of the power source cover 7 is clamped into the device shell 1, and the front part is fixed with the power source slot 5 through a screw. The power supply 6 is connected to the wire connections 2-9 via wires 14 to supply power to the metal coil 2-2.

In order to control the on/off of the power supply 6, a power switch 10 is fixed to the apparatus case 1, and the excitation control of the magnetostrictive seismic source 2 is realized by controlling the power switch 10, which substantially controls whether the metal coil 2-2 is on or off.

A control circuit board 9 is further fixed on the device shell 1, and the connection between the metal coil 2-2 and the power supply 6 is controlled by the control circuit board 9.

Still be fixed with range finding wheel 8 on device shell 1, install distance measuring sensor on range finding wheel 8, distance measuring sensor is connected with control circuit board 9, under control of control circuit board 9, realizes the detection to concrete defect detection device displacement.

Still be provided with handle 11 on device shell 1, the convenience is when handheld operation concrete defect detection device.

The concrete defect detection device also comprises a computer 13, a data interface 12 is arranged on the device shell 1, the distance measuring sensor and the piezoelectric sensor 3-2 are connected with the data interface 12 through a data line, and the data interface 12 is connected with the computer 13 through a data line 15. The distance measuring sensor and the piezoelectric sensor 3-2 transmit the collected data to the computer 13 for storage through a data interface 12 in a wired communication mode.

The distance measuring sensor and the piezoelectric sensor 3-2 can also upload the collected data to the computer 13 for storage in a wireless communication mode.

The utility model discloses when using, hug closely the surface of measured object with signal collector 3, the user singlehanded grips handle 11, manual promotion signal collector 3 is along the uniform velocity removal of survey line that sets up, press switch 10 switch-on 6, under the control of gathering mainboard 12, every certain distance makes magnetostrictive seismic source 2 and power 6 switch-on, 2 surperficial excitation seismic waves that strike the measured object through magnetostrictive seismic source, and simultaneously, the trigger on the switch-on signal collector 3, control piezoelectric sensor 3-2 gathers seismic wave signal, store in computer 13, accomplish the collection of signal.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific 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, the schematic representations of the terms used above are not necessarily intended to refer 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, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present invention have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the scope of the present invention.

The above detailed description of the present invention does not limit the scope of the present invention. Any other corresponding changes and modifications made according to the technical idea of the present invention should be included in the protection scope of the claims of the present invention.

Claims (10)

1. The concrete defect detection device is characterized by comprising a device shell, a magnetostrictive seismic source and a signal collector, wherein the magnetostrictive seismic source and the signal collector are respectively arranged on the device shell; wherein the content of the first and second substances,

the magnetostrictive seismic source comprises an insulating sleeve, a metal coil, a magnetostrictive rod, an excitation spring and a shock-excitation hammer head, wherein the metal coil is wound on the insulating sleeve, the magnetostrictive rod is of a stepped structure and is positioned in the insulating sleeve, the bottom end of the magnetostrictive rod extends out of the insulating sleeve and is connected with the shock-excitation hammer head, the excitation spring is sleeved on the magnetostrictive rod, and two ends of the magnetostrictive rod are respectively abutted to the steps of the shock-excitation hammer head and the shock-excitation transmission rod;

the signal collector is two at least, includes damping spring, piezoelectric type sensor, pulley bracing piece and pulley respectively, the pulley pass through the pulley bearing with the pulley bracing piece is articulated, the piezoelectric type sensor is fixed lie in on the pulley bracing piece the top of pulley, and with the pulley butt, the damping spring cover is established on the pulley bracing piece, both ends respectively with the piezoelectric type sensor the top butt of pulley bracing piece.

2. The concrete defect detection device of claim 1, wherein a guide rail is fixed on the device shell, the signal collector further comprises a sliding block arranged at the top end of the pulley support rod, the sliding block is connected with the guide rail in a sliding manner, and one end of the damping spring is abutted to the sliding block.

3. The concrete defect detecting device of claim 1, wherein the magnetostrictive source further comprises a guide end fixed at the bottom of the insulating sleeve, a through hole is formed in the guide end, and the bottom end of the magnetostrictive rod penetrates through the through hole to be connected with the shock hammer head.

4. The concrete defect detecting apparatus of claim 3, wherein the magnetostrictive source further comprises a source housing and a lead connector fixed to the source housing, the metal coil being connected to the lead connector.

5. The concrete defect detecting device of claim 4, wherein a power supply groove is formed on the device shell, a power supply is installed on the power supply groove, a power supply cover covers the power supply groove, and the lead connector is connected with the power supply through a lead.

6. The concrete defect detecting device of claim 5, wherein a distance measuring wheel is further mounted on the device housing through a bearing, and a distance measuring sensor is mounted on the distance measuring wheel.

7. The concrete defect detecting device of claim 6, wherein a control circuit board is mounted on the device housing, and the distance measuring sensor is connected with the control circuit board through a lead.

8. The concrete defect detecting device of claim 7, wherein a power switch for controlling the power supply is mounted on the device housing, and the power switch is connected to the control circuit board through a wire.

9. The concrete defect detecting apparatus according to claim 1, wherein a handle is provided on the apparatus housing.

10. The concrete defect detecting device of claim 6, further comprising a computer, wherein a data interface is arranged on the device housing and connected with the piezoelectric sensor and the distance measuring sensor respectively, and the data interface is connected with the computer through a data line.

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