KR101635950B1 - Apparatus and Method for Non-contact Measurement of Concrete Strength Ultrasonic Waves - Google Patents

Apparatus and Method for Non-contact Measurement of Concrete Strength Ultrasonic Waves Download PDF

Info

Publication number
KR101635950B1
KR101635950B1 KR1020150066618A KR20150066618A KR101635950B1 KR 101635950 B1 KR101635950 B1 KR 101635950B1 KR 1020150066618 A KR1020150066618 A KR 1020150066618A KR 20150066618 A KR20150066618 A KR 20150066618A KR 101635950 B1 KR101635950 B1 KR 101635950B1
Authority
KR
South Korea
Prior art keywords
ultrasonic
concrete
transducer
frame
mount frame
Prior art date
Application number
KR1020150066618A
Other languages
Korean (ko)
Inventor
민지영
김도겸
Original Assignee
한국건설기술연구원
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 한국건설기술연구원 filed Critical 한국건설기술연구원
Priority to KR1020150066618A priority Critical patent/KR101635950B1/en
Application granted granted Critical
Publication of KR101635950B1 publication Critical patent/KR101635950B1/en

Links

Images

Classifications

    • 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
    • G01N29/22—Details, e.g. general constructional or apparatus details
    • 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
    • G01N29/041—Analysing solids on the surface of the material, e.g. using Lamb, Rayleigh or shear waves
    • 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
    • G01N29/22—Details, e.g. general constructional or apparatus details
    • G01N29/223—Supports, positioning or alignment in fixed situation
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/38—Concrete; Lime; Mortar; Gypsum; Bricks; Ceramics; Glass
    • G01N33/383—Concrete or cement
    • 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
    • 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
    • G01N2291/04—Wave modes and trajectories
    • G01N2291/042—Wave modes
    • G01N2291/0423—Surface waves, e.g. Rayleigh waves, Love waves
    • 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
    • G01N2291/10—Number of transducers
    • G01N2291/105—Number of transducers two or more emitters, two or more receivers
    • 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
    • G01N2291/26—Scanned objects
    • G01N2291/263—Surfaces
    • G01N2291/2632—Surfaces flat

Landscapes

  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Ceramic Engineering (AREA)
  • Food Science & Technology (AREA)
  • Medicinal Chemistry (AREA)
  • Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)

Abstract

The present invention relates to a contactless concrete intensity measuring device using ultrasonic waves, capable of decoding the intensity of concrete by calculating the propagation velocity of a surface wave, flowing along the surface of the concrete, by installing an ultrasonic receiving transducer and an ultrasonic transmitting transducer at a distance from the surface of the concrete. According to the present invention, the device includes: a support structure installed on a side of the concrete; an ultrasonic transmitting transducer installed in the support structure to be at a distance from the surface of the concrete to generate ultrasonic waves in the concrete; an ultrasonic receiving transducer installed in the support structure to be at a distance from the surface of the concrete to measure ultrasonic waves propagated through the concrete; and a controller decoding the intensity of the concrete by using a detection signal of the ultrasonic receiving transducer.

Description

TECHNICAL FIELD [0001] The present invention relates to a non-contact type concrete strength measuring apparatus using ultrasound,

The present invention relates to an apparatus for measuring the strength of concrete. More particularly, the present invention relates to an apparatus for measuring the strength of concrete, which comprises an ultrasonic transmission transducer and an ultrasonic reception transducer spaced apart from the surface of concrete, To a non-contact type concrete strength measuring device using ultrasound which can read the strength of concrete.

Concrete is widely used as the most common and generalized construction and building material, and researches on improving performance and stable quality control are being actively conducted. In particular, the strength of concrete is a basic factor for evaluating the stability of the structure. Maintaining the required design strength and maintaining homogeneity are essential for securing the stability of the structure itself, and it is a basic guideline for evaluating other properties.

Although the strength of concrete is considered to be the most important in quality control, quality control is based on the strength of 28 days of age, which is the standard curing period, so there is a time difference between the speed of progress and the evaluation period of strength. Can not be reflected in the construction quickly, and when the strength of the requirement is excessive, it becomes difficult to handle the problem when there is a problem of strength, such as the burden of economic and administrative loss as well as safety.

The strength of concrete curing can be estimated by using the integrated temperature method or the Schmidt hammer method. However, this strength estimation technique can measure at arbitrary points and does not fully reflect the internal state of the concrete structure, so that it is difficult to accurately and quickly estimate the strength in real time.

On the other hand, the strength of the concrete can be estimated by measuring the propagation velocity of surface waves flowing on the concrete surface by emitting ultrasound to the concrete. A variety of devices have been developed for estimating the strength of concrete through the relationship between surface wave propagation velocity and concrete strength. For example, there is an apparatus for measuring the strength of concrete using surface wave velocity measurement disclosed in Japanese Patent Application Nos. 10-1195500 and 10-1257304 developed by the present applicant.

However, in the conventional concrete strength measuring apparatus using ultrasonic waves, both the ultrasonic wave transmitting probe and the ultrasonic wave receiving probe are in contact with the surface of the concrete to detect the surface wave. It is very important to remove the influence of the couplant layer in order to improve the accuracy of the diagnosis results by using the ultrasonic-based contact-type concrete diagnosis system. For this purpose, Additional surface treatment (e.g., grinding) is required, and the effect of the cou- plinant layer must be minimized by thinly applying the cou- pled layer. However, since the inspector can not arbitrarily adjust the thickness of the couplant layer and the information about the couplant properties such as the elastic modulus and the shear coefficient is not provided basically, it is difficult to analyze the effect on the result. The effect of runt can not be avoided.

In addition, it takes a lot of time to set up the concrete before measuring the strength of the concrete due to the additional surface treatment, and since the entire process is dependent on the inspector, there is a limit in that the diagnosis result is highly volatile,

Registration No. 10-1195500 (registered on October 23, 2012) Registration No. 10-1257304 (Registered April 17, 2013)

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a method of detecting a surface wave propagation speed in a non-contact manner without using a couplant, The present invention provides a non-contact type concrete strength measuring device.

Another object of the present invention is to provide a non-contact type concrete strength measuring device using ultrasound capable of measuring a large amount of signals in a short period of time and scanning the test surface at a high speed without requiring additional surface treatment will be.

According to another aspect of the present invention, there is provided an apparatus for measuring the strength of a non-contact type concrete, comprising: a support structure installed on one side of a concrete; An ultrasonic transmission transducer installed at the support structure at a distance from the surface of the concrete to generate ultrasonic waves in the concrete; An ultrasonic reception transducer installed at the support structure at a predetermined distance from the surface of the concrete to measure ultrasonic waves propagated through the concrete; And a controller for reading the intensity of the concrete by the detection signal of the ultrasonic receiving transducer. The present invention also provides an apparatus for measuring a non-contact type concrete strength using ultrasonic waves.

According to another aspect of the present invention, there is provided an apparatus for measuring the strength of a non-contact type concrete, comprising: a main frame having a support portion supported on a surface of concrete; a lift frame having an end portion movably connected to a support portion of the main frame, A support structure including a first mount frame installed at a central portion of the frame and a second mount frame installed horizontally along the lift frame; An ultrasonic transmission transducer installed on the second mount frame so as to be spaced apart from the surface of the concrete by a predetermined distance to generate ultrasonic waves in the concrete and rotatably mounted on the first mount frame; An ultrasonic reception transducer installed at the first mount frame so as to be spaced apart from the surface of the concrete by a predetermined distance to measure ultrasonic waves propagated through the concrete and installed to be rotatable with respect to the second mount frame; And a controller that is fixedly installed on the main frame and is electrically connected to the ultrasonic transmitting transducer and the ultrasonic receiving transducer and reads the intensity of the concrete by the detection signal of the ultrasonic receiving transducer.

According to the present invention, the measurement time and effort can be greatly reduced by detecting the propagation speed of surface waves in a non-contact manner without using a couplant, thereby measuring the strength of concrete. Further, since no additional surface treatment is required, It is possible to scan the inspection surface at a high speed and thus it is possible to grasp the state of the inside of the concrete structure with high resolution through arrangement of the transmitter and the receiver and proper scanning technique.

1 is a view illustrating an apparatus for measuring the strength of a non-contact type concrete according to an embodiment of the present invention.
FIG. 2 is a front view showing the non-contact type concrete strength measuring apparatus shown in FIG. 1. FIG.
FIG. 3 is a top view of the non-contact type concrete strength measuring apparatus shown in FIG. 1. FIG.
FIG. 4 is a view showing a part of the non-contact type concrete strength measuring apparatus shown in FIG. 1. FIG.
5 is a view showing an ultrasonic signal according to a curing period of concrete measured using a non-contact type concrete strength measuring apparatus.
6 is a graph showing the relationship between the compressive strength and the ultrasonic velocity of the concrete obtained by using the non-contact type concrete strength measuring apparatus.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of a non-contact type concrete strength measuring apparatus using ultrasonic waves according to the present invention will be described in detail with reference to the accompanying drawings.

1 to 4, an apparatus for measuring the strength of a non-contact type concrete according to an embodiment of the present invention includes: a supporting structure provided on one side of a concrete C; Four ultrasonic transmission transducers 50 installed to be spaced apart from each other to generate ultrasonic waves in the concrete, and one ultrasonic transmission transducer 50 installed at the center of the support structure and spaced apart from the surface of the concrete to measure ultrasonic waves propagated through the concrete An ultrasonic receiving transducer 60 and a controller 70 for reading the strength of the concrete by the detection signal of the ultrasonic receiving transducer 60. [

The supporting structure is a supporting structure provided on one side of the concrete C and includes a main frame 10 having a supporting portion 11 supported on the surface of the concrete C, A lift frame 20 movably connected to the support portion 11 so as to be movable up and down (in the vertical direction in the figure, and when the main frame is provided on the side surface of the concrete, in the side direction) A first mount frame 30 installed at a central portion and coupled with the ultrasonic receiving transducer 60 and a second mount frame 30 installed horizontally along the elevating frame 20 and coupled to the ultrasonic transmitting transducer 50 And includes a second mount frame (40).

In this embodiment, the main frame 10 is substantially X-shaped, and the support portions 11 are formed to extend vertically at the respective end portions of the main frame 10. A threaded hole 13 is formed at the center of the main frame 10 to thread the lifting screw 25 for moving the lifting frame 20 in the vertical direction. The upper end of the lifting screw 25 is provided with a handle 26 so that it can be easily gripped by an examiner.

The elevating frame 20 includes a rectangular frame-shaped connecting frame portion 22 having elevation guide blocks 23 that vertically move up and down along the support portions 11 at four corners, And a guide frame part 21 in the shape of a circular bar and provided in an X-shape on the inside of the connecting frame part 22 while being coupled to the connecting frame part 22. A bushing (not shown) that slides relative to the support portion 11 may be installed on the elevation guide block 23.

A screw fixing plate 24 is provided at the center of the guide frame part 21 to be engaged with a lower end of the elevating screw 25. When the inspector manually rotates the elevating screw 25, The screw fixing plate 24 and the guide frame unit 21 coupled to the screw fixing plate 24 move upward or downward together with the lifting screw 25.

As the lifting frame 20 moves up and down with respect to the main frame 10, the distance between the ultrasonic transmitting transducer 50 and the ultrasonic receiving transducer 60 with respect to the surface of the concrete C can be adjusted .

The first mount frame 30 is fixed to the center of the guide frame portion 21 of the lifting frame 20. A first rotary block 34 is rotatably installed at a lower end of the first mount frame 30 around a horizontal first hinge axis 33. The ultrasonic waves The receiving transducer 60 is coupled. The first hinge shaft 33 has a screw structure formed on the outer surface thereof and rotates the first hinge shaft 33 in the counterclockwise direction with respect to the lower end of the first mount frame 30, The first rotary block 34 is rotated to adjust the angle of the ultrasonic receiving transducer 60 to a desired angle. When the angle adjustment is completed, the first hinge axis 33 is rotated clockwise to tighten The first rotary block 34 is constrained to the first mount frame 30 so that the angle of the ultrasonic reception transducer 60 is maintained.

The first mount frame 30 is vertically movable by a known height adjusting device (for example, a height adjusting device applied to a camera tripod) not shown in the drawing, The height of the ultrasonic receiving transducer 60 can be adjusted by adjusting the height of the ultrasonic receiving transducer 60.

An angle measurement unit for measuring the rotation angle of the first rotation block 34 with respect to the first mount frame 30 is installed at one side of the first rotation block 34. In this embodiment, the angle measuring unit is applied with a goniometer 35 with a scale marking an angle, but in addition, an angle may be measured using a MEMS sensor such as a tiltmeter.

The second mount frame 40 is slidably installed along the guide frame portion 21 of the lifting frame 20 so that the distance d between the ultrasonic receiving transducer 60 and the ultrasonic transmitting transducer 50 is It can be adjusted. To this end, a slide block 41 that horizontally moves along the guide frame portion 21 of the lifting frame 20 is installed at the upper end of the second mount frame 40. The slide block 41 is provided with a lift frame (42) for restraining or releasing the slide block (41) relative to the slide block (20). The locking screw 42 allows the slide block 41 to be restrained or movable relative to the guide frame portion 21 while the end portion thereof is in contact with or separated from the outer surface of the guide frame portion 21.

When the locking screw 42 is manually rotated so that the end of the locking screw 42 is spaced apart from the outer surface of the guide frame portion 21, the slide block 41 can freely move along the guide frame portion 21 The second mount frame 40 and the ultrasonic transmitting transducer 50 coupled thereto can be horizontally moved. When the distance between the ultrasonic transmitting transducer 50 and the ultrasonic receiving transducer 60 is adjusted as desired by moving the ultrasonic transmitting transducer 50 to a desired position and then the locking screw 42 is moved in the opposite direction When the end of the locking locking screw 42 is brought into pressure contact with the guide frame portion 21, the slide block 41 is fixed and the ultrasonic transmitting transducer 50 maintains the adjusted position.

A second rotary block 44 is installed on the lower end of the second mount frame 40 so as to be rotatable about a horizontal second hinge axis 43. A lower portion of the second rotary block 44 The outgoing transducer 50 is coupled. The second hinge shaft 43 also has a screw structure similar to the first hinge shaft 33 and serves to restrain or release the second rotary block 44 relative to the second mount frame 40. The second rotating block 44 is also provided with a goniometer 45 as an angle measuring unit for indicating the rotating angle of the second rotating block 44 with respect to the second mounting frame 40.

The second mount frame 40 is also structured so as to be relatively movable up and down by a known height adjusting device not shown in the figure like the first mount frame 30, It is possible to adjust the fine height of the ultrasonic wave transmitting transducer 50. [0064]

The ultrasonic wave transmitting transducer 50 and the ultrasonic wave receiving transducer 60 are installed at a distance from the surface of the concrete C to generate ultrasonic waves in the concrete C in a noncontact manner, And to measure the ultrasonic waves that are generated. The ultrasonic transmitting transducer 50 generates a high-energy ultrasonic wave of a capacitance type with a small power loss. In this embodiment, one ultrasonic reception transducer 60 and four ultrasonic transmission transducers 50 are configured. However, the number of the ultrasonic transmission transducers 50 and the ultrasonic reception transducers 60 is only one And the numbers of the ultrasonic wave transmitting transducer 50 and the ultrasonic wave receiving transducer 60 are not limited to the above-described embodiments.

The controller 70 is fixed to the main frame 10 of the supporting structure and is electrically connected to the ultrasonic transmitting transducer 50 and the ultrasonic receiving transducer 60. The controller 70 obtains a function f (t) of the time of the detection signal of the ultrasonic reception transducer 60 and outputs the detection signal of the ultrasonic reception transducer 60 to the wavelet The surface wave arrival time t is found by the wavelet transform to obtain the time corresponding to the maximum value of the transformation function W (b, a) and the distance between the ultrasonic wave transmission transducer 50 and the ultrasonic wave reception transducer 60 d is divided by the obtained time t to calculate the propagation velocity V of the surface wave contained in the ultrasonic wave applied to the concrete C by the ultrasonic wave emitting transducer 50, The concrete strength corresponding to the propagation velocity V of the calculated surface wave is read from the database constructed for the relationship (see FIGS. 5 and 6).

Figure 112015045853443-pat00001

Figure 112015045853443-pat00002

In Equations (1) and (2), a is a compression coefficient for determining the size (scale) of the wavelet, and b is a transition coefficient related to the movement to the time axis.

On the other hand, when the ultrasonic wave propagates along the medium, reflection and refraction occur at the interface with other medium, and the wave mode changes. The amount of reflection and refraction is determined by the difference in mechanical properties between the two media, and the acoustic impedance (Z) difference has the greatest effect. The acoustic impedance is expressed as the product of the density of the medium and the velocity of the compression wave in the medium. The reflection coefficient and the transmission coefficient, which determine the amplitude of the wave transmitted through the medium boundary surface, are defined by Equations 3 and 4 below. do.

Figure 112015045853443-pat00003

Figure 112015045853443-pat00004

Where Z 1 and Z 2 are the acoustic impedance of the surrounding medium. Table 1 shows the main properties and acoustic impedance of concrete, air, and piezoelectric materials. When the acoustic impedance of each medium is substituted into equations (3) and (4), the reflection coefficient at the concrete and air interface is 0.999977 and the transmission coefficient is very small, 2.3 × 10 -5 . That is, only a very small amount of ultrasonic waves generated from the piezoelectric body is incident on the concrete through the air layer and mostly reflected at the air-concrete interface.

Property concrete air Piezoelectric body PZT-4 Density (kg / m3) 2200-2500 1.225 7500 Compressed wave velocity (m / s) 3800-4500 343 4820 Acoustic Impedance (MRayl) 8.36-11.3 0.00042 36.15

Therefore, as described above, the ultrasonic transmitting transducer 50 and the ultrasonic receiving transducer 60 generate ultrasonic waves in a noncontact manner and measure ultrasonic waves. Therefore, in order to minimize the ultrasonic loss in the air layer, the height from the surface of the concrete C The angle of incidence of the ultrasonic transmitting transducer 50 must be optimized. The ultrasonic transmission transducer 50 and the ultrasonic reception transducer 60 are moved by vertically moving the lifting frame 20 relative to the main frame 10 in order to easily adjust the two parameters and to scan under optimal conditions. The first rotating block 34 and the second rotating block 44 are connected to the first mounting frame 30 by using the goniometers 35 and 45 so that the distance between the first mounting block 30 and the surface of the concrete C can be adjusted. And the second mount frame (40) so that the angle of incidence of the ultrasonic transmitting transducer (50) can be adjusted. The second mount frame 40 provided with the ultrasonic transmitting transducer 50 is horizontally moved along the guide frame portion 21 of the lifting frame 20 so that the ultrasonic transmitting transducer 50 and the ultrasonic receiving transducer 60 are moved horizontally, It is possible to easily adjust the distance between them.

As a result of the experiment with the concrete material, the height to the central portion of each ultrasonic transmitting transducer 50 is 1 cm, the height to the central portion of the ultrasonic receiving transducer 60 is 0.5 cm, the ultrasonic wave of the ultrasonic transmitting transducer 50 When the incident angle is 13.5 °, the wave loss and noise are the least, but this value depends on the physical properties of the medium.

Meanwhile, the non-contact type concrete strength measuring apparatus using ultrasonic waves of the present invention can be applied equally or similarly to measure the strength of various solid structures as well as concrete structures.

While the present invention has been described in connection with what is presently considered to be the most practical and preferred embodiment, it is to be understood that the invention is not limited to the disclosed embodiments. It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the scope of the present invention.

10: main frame 11:
20: lifting frame 21: guide frame part
22: connecting frame part 23: elevating guide block
25: lifting screw 26: handle
30: first mount frame 33: first hinge shaft
34: first rotating block 35: goniometer
40: second mount frame 41: slide block
42: locking screw 43: second hinge shaft
44: second rotating block 45: goniometer
50: Ultrasonic transmitting transducer 60: Ultrasonic receiving transducer
70:

Claims (17)

A support structure installed on one side of the concrete (C);
An ultrasonic transmission transducer (50) installed at the support structure at a predetermined distance from the surface of the concrete to generate ultrasonic waves in the concrete;
An ultrasonic reception transducer 60 installed at the support structure at a predetermined distance from the surface of the concrete to measure ultrasonic waves propagated through the concrete;
And a controller (70) for reading the strength of the concrete by the detection signal of the ultrasonic receiving transducer (60)
The support structure includes a main frame 10 having a pillar main portion 11 supported at a surface of a concrete C at an end portion of the main frame 10, A first mount frame 30 mounted on the lifting frame 20 and vertically moving together with the lifting frame 20 and coupled to the ultrasound receiving transducer 60 at a lower end thereof; And a second mount frame (40) mounted on the lifting frame (20) so as to be spaced apart from the first mount frame (30) and to which the ultrasonic transmission transducer (50) is coupled at a lower end thereof. Non - contact type of concrete strength measuring device. The apparatus of claim 1, wherein the ultrasonic transmitting transducer (50) and the ultrasonic receiving transducer (60) are vertically movable relative to the supporting structure. The apparatus of claim 1, wherein the ultrasonic transmitting transducer (50) and the ultrasonic receiving transducer (60) are rotatably mounted on a support structure. The apparatus of claim 3, wherein the supporting structure is provided with an angle measuring unit for measuring a rotation angle of the ultrasonic transmitting transducer (50) or the ultrasonic receiving transducer (60). 2. The ultrasonic diagnostic apparatus according to claim 1, wherein the ultrasonic transmitting transducer (50) or the ultrasonic receiving transducer (60) is horizontally movable relative to the supporting structure so that relative distance between the ultrasonic transmitting transducer (50) Concrete strength measuring device. delete The hinge device according to claim 1, wherein a first rotation block (34) is installed at a lower end of the first mount frame (30) so as to be rotatable about a horizontal first hinge axis (33) And the ultrasonic receiving transducer (60) is coupled to a lower portion of the ultrasonic receiving transducer (60). The ultrasonic diagnostic apparatus according to claim 7, wherein an angle measuring unit for measuring a rotation angle of the first rotating block (34) with respect to the first mount frame (30) is provided in the first rotating block (34) Non-contact type concrete strength measuring device.  The hinge device according to claim 1, wherein a second rotary block (44) is rotatably mounted on a lower end of the second mount frame (40) about a second horizontal hinge axis (43) Wherein the ultrasonic transmitting transducer (50) is coupled to a lower portion of the ultrasonic wave transmitting transducer (50). The apparatus according to claim 9, wherein the second rotating block (44) is provided with an angle measuring unit for measuring a rotating angle of the second rotating block (44) with respect to the second mounting frame (40) Non-contact type concrete strength measuring device. The ultrasonic transducer according to claim 1, wherein the first mount frame (30) or the second mount frame (40) is horizontally movable relative to the lift frame (20) Wherein the relative distance between the first and second electrodes is adjustable. 12. The slide fastener according to claim 11, wherein a slide block (41) horizontally moving along the lifting frame (20) is provided at an upper end of the first mount frame (30) or the second mount frame 41) is provided with a locking screw (42) for restricting or releasing the slide block (41) with respect to the lifting frame (20). The apparatus according to claim 1, wherein the lifting frame (20) is coupled to a lower end of a lifting screw (25) spirally coupled to a central portion of the main frame (10) and is moved up and down by rotation of the lifting screw Wherein the distance between the ultrasonic transmitting transducer (50) and the ultrasonic receiving transducer (60) is adjusted with respect to the distance between the ultrasonic transmitting transducer (50) and the ultrasonic receiving transducer (60). The ultrasonic diagnostic apparatus according to claim 13, wherein the first mount frame (30) and the second mount frame (40) are vertically movable by a height adjusting device so that the ultrasonic transmission transducer (50) Wherein the distance between the receiving transducer (60) and the receiving transducer (60) can be finely adjusted. The ultrasonic diagnostic apparatus according to claim 1, wherein the controller (70) obtains a function f (t) with respect to time of a detection signal of the ultrasonic reception transducer (60) (t) between the ultrasonic transmitting transducers 50 and the ultrasonic receiving transducers 60 is obtained by subtracting the distance d between the ultrasonic transmitting transducers 50 and the ultrasonic receiving transducers 60 from the obtained time t, And the propagation velocity V of the surface wave included in the ultrasonic waves applied to the concrete C is calculated by the ultrasonic transmitting transducer 50. The relationship between the propagation velocity of the surface wave and the concrete strength is calculated from the database And the concrete strength corresponding to the propagation velocity (V) of the calculated surface wave is read. A main frame 10 having a main portion 11 supported on the surface of concrete and a lifting frame 20 having an end vertically movably connected to a support portion 11 of the main frame 10, A first mount frame 30 provided at the center of the lifting frame 20 and a second mount frame 40 installed along the lifting frame 20, The mount frame 40 includes a support structure installed horizontally along the lifting frame 20 to adjust the distance between the first mount frame 30 and the second mount frame 40;
An ultrasonic transmission transducer (50) installed at the second mount frame (40) so as to be spaced apart from the surface of the concrete by a predetermined distance to generate ultrasonic waves in the concrete and installed to be rotatable with respect to the first mount frame (30);
An ultrasonic reception transducer 60 installed to be spaced apart from the surface of concrete by a predetermined distance from the first mount frame 30 and measuring ultrasonic waves propagated through the concrete and installed to be rotatable with respect to the second mount frame 40; )Wow;
The ultrasonic transmission transducer 50 is fixed to the main frame 10 and is electrically connected to the ultrasonic transmitting transducer 50 and the ultrasonic receiving transducer 60. The intensity of the concrete is detected by the detection signal of the ultrasonic receiving transducer 60 And a controller (70) for reading the non-contact type of concrete. The ultrasonic diagnostic apparatus according to claim 16, wherein the second mount frame (40) and the first mount frame (30) are provided with angular measurement units for measuring the angles of rotation of the ultrasonic transmitting transducer (50) Wherein the non-contact type concrete strength measuring device is provided with an ultrasonic wave.
KR1020150066618A 2015-05-13 2015-05-13 Apparatus and Method for Non-contact Measurement of Concrete Strength Ultrasonic Waves KR101635950B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020150066618A KR101635950B1 (en) 2015-05-13 2015-05-13 Apparatus and Method for Non-contact Measurement of Concrete Strength Ultrasonic Waves

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020150066618A KR101635950B1 (en) 2015-05-13 2015-05-13 Apparatus and Method for Non-contact Measurement of Concrete Strength Ultrasonic Waves

Publications (1)

Publication Number Publication Date
KR101635950B1 true KR101635950B1 (en) 2016-07-04

Family

ID=56501704

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020150066618A KR101635950B1 (en) 2015-05-13 2015-05-13 Apparatus and Method for Non-contact Measurement of Concrete Strength Ultrasonic Waves

Country Status (1)

Country Link
KR (1) KR101635950B1 (en)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107607626A (en) * 2017-09-13 2018-01-19 中国石油天然气集团公司管材研究所 Electromagnet ultrasonic changer and the equipment with electromagnet ultrasonic changer automatic detection steel plate
KR101892399B1 (en) * 2017-08-31 2018-08-27 경기대학교 산학협력단 Concrete fire damage depth measuring device with multi aligned array senser
KR101972765B1 (en) 2019-01-08 2019-04-29 주식회사 다산컨설턴트 Ultrasonic Coupling Medium Application Device for Structural Safety Diagnosis
CN110261481A (en) * 2019-07-26 2019-09-20 招商局重庆公路工程检测中心有限公司 Point pressure type acquisition device
CN110346453A (en) * 2019-07-26 2019-10-18 招商局重庆公路工程检测中心有限公司 Defect minispread reflection echo rapid detection method in a kind of concrete structure
KR102069119B1 (en) 2019-09-04 2020-01-23 주식회사 수성엔지니어링 Ultrasonic Coupling Medium Application Device for Structural Safety Diagnosis
KR20200077721A (en) * 2018-12-21 2020-07-01 숭실대학교산학협력단 Aparatus and method for Non-contact estimating of Physical Properties of concrete
KR102157303B1 (en) 2020-04-14 2020-09-17 주식회사 천우 Ultrasonic Coupling Medium Application Device for Structural Safety Diagnosis
KR102158237B1 (en) 2020-06-03 2020-09-21 주식회사 하나이엔씨 Ultrasonic Coupling Medium Application Device for Structural Safety Diagnosis
KR102185481B1 (en) 2020-09-18 2020-12-02 주식회사 신라이앤씨 Measuring method of non-destructive type concrete strength or crack using ultrasonic method
KR102210709B1 (en) 2019-10-14 2021-02-02 쏠라 주식회사 MEASURING DEVICE FOR CONCRETE STRENGTH OF ULTRASONIC TYPE BY IoT
KR102210591B1 (en) * 2020-09-18 2021-02-03 주식회사 신라이앤씨 Assistance apparatus for measuring strength or crack of concrete using ultrasonic pulse
KR102210592B1 (en) * 2020-09-18 2021-02-03 주식회사 정진이앤씨 Assistance apparatus for measuring strength or crack of concrete using ultrasonic pulse
KR20210062909A (en) 2019-11-22 2021-06-01 한국건설기술연구원 System for evaluating internal damages of asphalt-concrete bridge-deck using air-coupled ultrasonics, and method for the same

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1993021523A1 (en) * 1992-04-10 1993-10-28 Olson Engineering Incorporated Scanning apparatus and method for non-destructive materials evaluation
JP2008215877A (en) * 2007-02-28 2008-09-18 Toshiba Corp Ultrasonic flaw detection device and inspection device
JP2009069027A (en) * 2007-09-13 2009-04-02 Tokyo Metropolis Measuring method and apparatus related to heat receiving effect of refractory building by ultrasonic wave
KR101195500B1 (en) 2010-12-01 2012-10-30 한국건설기술연구원 Slip Form Method for Constructing Concrete Structure, using Ultrasonic Test
KR101257304B1 (en) 2011-10-17 2013-04-23 한국건설기술연구원 Ultrasonic test apparatus for determining concrete strength and slip form method for constructing concrete structure using ultrasonic test apparatus
KR101425748B1 (en) * 2013-03-06 2014-08-06 중앙대학교 산학협력단 Non-contacting elastic wave measuring unit and Non-contacting elastic wave measuring apparatus including the same

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1993021523A1 (en) * 1992-04-10 1993-10-28 Olson Engineering Incorporated Scanning apparatus and method for non-destructive materials evaluation
JP2008215877A (en) * 2007-02-28 2008-09-18 Toshiba Corp Ultrasonic flaw detection device and inspection device
JP2009069027A (en) * 2007-09-13 2009-04-02 Tokyo Metropolis Measuring method and apparatus related to heat receiving effect of refractory building by ultrasonic wave
KR101195500B1 (en) 2010-12-01 2012-10-30 한국건설기술연구원 Slip Form Method for Constructing Concrete Structure, using Ultrasonic Test
KR101257304B1 (en) 2011-10-17 2013-04-23 한국건설기술연구원 Ultrasonic test apparatus for determining concrete strength and slip form method for constructing concrete structure using ultrasonic test apparatus
KR101425748B1 (en) * 2013-03-06 2014-08-06 중앙대학교 산학협력단 Non-contacting elastic wave measuring unit and Non-contacting elastic wave measuring apparatus including the same

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101892399B1 (en) * 2017-08-31 2018-08-27 경기대학교 산학협력단 Concrete fire damage depth measuring device with multi aligned array senser
CN107607626A (en) * 2017-09-13 2018-01-19 中国石油天然气集团公司管材研究所 Electromagnet ultrasonic changer and the equipment with electromagnet ultrasonic changer automatic detection steel plate
KR20200077721A (en) * 2018-12-21 2020-07-01 숭실대학교산학협력단 Aparatus and method for Non-contact estimating of Physical Properties of concrete
KR102219075B1 (en) 2018-12-21 2021-02-23 숭실대학교산학협력단 Aparatus and method for Non-contact estimating of condensation of concrete
KR101972765B1 (en) 2019-01-08 2019-04-29 주식회사 다산컨설턴트 Ultrasonic Coupling Medium Application Device for Structural Safety Diagnosis
CN110261481A (en) * 2019-07-26 2019-09-20 招商局重庆公路工程检测中心有限公司 Point pressure type acquisition device
CN110346453A (en) * 2019-07-26 2019-10-18 招商局重庆公路工程检测中心有限公司 Defect minispread reflection echo rapid detection method in a kind of concrete structure
CN110261481B (en) * 2019-07-26 2023-12-12 招商局重庆公路工程检测中心有限公司 Point pressure type acquisition device
CN110346453B (en) * 2019-07-26 2021-10-26 招商局重庆公路工程检测中心有限公司 Method for rapidly detecting reflection echoes of small defect arrays in concrete structure
KR102069119B1 (en) 2019-09-04 2020-01-23 주식회사 수성엔지니어링 Ultrasonic Coupling Medium Application Device for Structural Safety Diagnosis
KR102210709B1 (en) 2019-10-14 2021-02-02 쏠라 주식회사 MEASURING DEVICE FOR CONCRETE STRENGTH OF ULTRASONIC TYPE BY IoT
KR20210062909A (en) 2019-11-22 2021-06-01 한국건설기술연구원 System for evaluating internal damages of asphalt-concrete bridge-deck using air-coupled ultrasonics, and method for the same
KR102157303B1 (en) 2020-04-14 2020-09-17 주식회사 천우 Ultrasonic Coupling Medium Application Device for Structural Safety Diagnosis
KR102158237B1 (en) 2020-06-03 2020-09-21 주식회사 하나이엔씨 Ultrasonic Coupling Medium Application Device for Structural Safety Diagnosis
KR102210592B1 (en) * 2020-09-18 2021-02-03 주식회사 정진이앤씨 Assistance apparatus for measuring strength or crack of concrete using ultrasonic pulse
KR102210591B1 (en) * 2020-09-18 2021-02-03 주식회사 신라이앤씨 Assistance apparatus for measuring strength or crack of concrete using ultrasonic pulse
KR102185481B1 (en) 2020-09-18 2020-12-02 주식회사 신라이앤씨 Measuring method of non-destructive type concrete strength or crack using ultrasonic method

Similar Documents

Publication Publication Date Title
KR101635950B1 (en) Apparatus and Method for Non-contact Measurement of Concrete Strength Ultrasonic Waves
US5814731A (en) Ultrasonic scanning apparatus for nondestructive site characterization of structures using a planar based acoustic transmitter and receiver in a rolling pond
CN107688051B (en) A kind of measurement method of the subsurface defect width based on Laser thermo-elastic generated surface acoustic waves
US5549003A (en) Method and apparatus for visualization of internal stresses in solid non-transparent materials by ultrasonic techniques and ultrasonic computer tomography of stress
AU2011336762B2 (en) System and method for ultrasonically evaluating structural properties
JP4938050B2 (en) Ultrasonic diagnostic evaluation system
AU2013204576C1 (en) Systems and methods to determine and monitor changes in rail conditions
KR20180011003A (en) Ultrasonic testing equipment for optimized measurement of crack depth in concrete
Neuenschwander et al. Application of air-coupled ultrasonics for the characterization of polymer and polymer-matrix composite samples
KR20100045284A (en) Calibration block (reference block) and calibration procedure for phased-array ultrasonic inspection
Reddy et al. Ultrasonic goniometry immersion techniques for the measurement of elastic moduli
KR101955440B1 (en) Dynamic modulus and residual stress measurement test evaluation device using ultrasonic sound velocity difference
CN109521092A (en) A kind of non-contact measurement apparatus and its method of surface wave and the Lamb wave velocity of sound
CN103033153B (en) Method for scanning ultrasonic microscope and meanwhile measuring mechanical property parameter of lamina material
RU2604562C2 (en) Method of resilient properties ultrasonic measurement
US10620166B1 (en) In-plane modulus testing of materials by an ultrasonic same-side method
Wiciak et al. Sensor and dimensions effects in ultrasonic pulse velocity measurements in mortar specimens
KR101255837B1 (en) Automatic ultrasonic testing apparatus
CN109490417A (en) A kind of metal material plane anisotropic supersonic detection method
Cetrangolo et al. Inspection of Concrete Using Air-Coupled Ultrasonic Pulse Velocity.
Aksoy Broadband ultrasonic spectroscopy for the characterization of viscoelastic materials
CN209471081U (en) A kind of non-contact measurement apparatus of surface wave and the Lamb wave velocity of sound
Kays et al. Air-coupled ultrasonic non-destructive testing of aerospace components
JP2015522174A (en) Method for characterizing an object containing at least a local symmetry plane
Siddiolo et al. Wooden panel paintings investigation: an air-coupled ultrasonic imaging approach

Legal Events

Date Code Title Description
E701 Decision to grant or registration of patent right
GRNT Written decision to grant