Device and method for measuring thickness of ultrasonic reinforced layer of cement concrete material

Abstract

The invention discloses a device and a method for measuring the thickness of an ultrasonic strengthened layer of a cement concrete material, and belongs to the technical field of material testing, a transparent glass grating plate capable of moving up and down and a cross-shaped sliding table are sleeved on a stand column of the device, and the cross-shaped sliding table and the glass grating plate are arranged in parallel to a sample table; an industrial camera is arranged on the cross-shaped sliding table in a sliding manner, and the industrial camera can slide on the cross-shaped sliding table in a reciprocating manner in the X-axis direction; scale lines are arranged on the glass grating plate in the X direction and the Y direction. Scale marks are marked on an X-direction guide rail of the cross-shaped sliding table. According to the invention, the ultrasonic strengthened layer of the cement concrete test piece to be measured can be visually measured through the ultrasonic strengthened layer thickness measuring device, the measurement can be completed at one time, the efficiency is higher, and the collected data is more comprehensive; the method can be used for accurately and reliably evaluating the quality of the ultrasonic strengthening layer of the cement concrete test piece.

Description

Technical Field

[0001] The invention belongs to the technical field of concrete material quality inspection, and specifically relates to a device and method for measuring the thickness of an ultrasonic strengthening layer of a cement concrete material. Background Art

[0002] The durability of concrete can be significantly improved by forming an ultrasonic strengthening layer on the surface of unhardened cement concrete material through ultrasonic high-frequency vibration. However, since the formation of the ultrasonic strengthening layer is affected by many factors such as ultrasonic frequency, power, action duration, action timing, and ultrasonic transducer (vibrator) installation method, its thickness distribution on the concrete surface is often uneven. A good ultrasonic strengthening layer should be of uniform and continuous thickness.

[0003] In the prior art, the formation effect of the ultrasonic strengthening layer of cement concrete is judged by visually observing and judging the ultrasonic strengthening layer by workers to judge the quality of the formed ultrasonic strengthening layer. This method relies on the experience of workers, and when there are many samples to be observed, it is impossible to make relevant judgments accurately and objectively. In order to evaluate the thickness of the ultrasonic strengthening layer, the present invention proposes a device for measuring the thickness of the ultrasonic strengthening layer and a method for measuring the thickness. The present invention provides the following technical solutions. Summary of the invention

[0004] The purpose of the present invention is to provide a device and method for measuring the thickness of an ultrasonic strengthening layer of a cement concrete material, so as to solve the problem that in the prior art, the formation effect of an ultrasonic strengthening layer of cement concrete is judged by visually observing and judging the ultrasonic strengthening layer by staff to judge the quality of the formed ultrasonic strengthening layer, and the staff relies on their experience. When there are many samples to be observed, it is impossible to make accurate and objective judgments on the results of image judgment.

[0005] The purpose of the present invention can be achieved by the following technical solutions:

[0006] A cement concrete material ultrasonic strengthening layer thickness measuring device comprises a sample table, on which two mutually parallel upright posts are fixedly arranged, and on which glass grid plates and a cross slide bracket which can move up and down are sleeved;

[0007] The glass grille panels are made of clear glass;

[0008] A cross slide is fixedly mounted on the cross slide bracket, and the cross slide and the glass grid plate are both arranged parallel to the sample stage;

[0009] An industrial camera is slidably arranged on the cross slide, and the industrial camera can slide back and forth along the X-axis direction on the cross slide;

[0010] The glass grid plate is provided with scale lines along the X and Y directions;

[0011] The X-direction guide rail of the cross slide is marked with scale lines.

[0012] Furthermore, the column adopts a smooth rod structure, and the glass grid plate and the cross slide bracket are sleeved on the column by interference connection;

[0013] During operation, the glass grid plate and the cross slide bracket can be fixed by means of a locking knob.

[0014] Furthermore, the industrial camera assembly is fixedly connected with a telecentric lens.

[0015] The present invention also discloses a method for measuring the thickness of an ultrasonic strengthening layer of a cement concrete material. The method is performed by the thickness measuring device described above and comprises the following steps:

[0016] The concrete specimen to be measured is placed on the sample table. During measurement, the cross section of the specimen with the ultrasonic strengthening layer faces upward, and the thickness direction of the strengthening layer is placed in the Y-axis direction.

[0017] When shooting or imaging, first place the industrial camera at the 0 point of the X-axis of the cross slide, and adjust the cross slide bracket in the Z-axis direction to make the image clearest, then adjust the grid plate bracket to make the scale of the glass grid plate clearest in the image;

[0018] Adjust the position of the specimen so that the edge of the strengthening layer coincides with the X-axis in the imaging, and the center point of the strengthening layer coincides with the 0 point of the X-axis; read the thickness value of the strengthening layer at each point along the positive and negative directions of the X-axis according to the scale.

[0019] Beneficial effects of the present invention:

[0020] The present invention can use the ultrasonic strengthening layer thickness measuring device to perform intuitive and visual measurement of the ultrasonic strengthening layer of the cement concrete specimen to be tested, and can complete the measurement in one go. Compared with visual and handheld measuring tool measurement methods, the present invention has higher efficiency and more comprehensive collected data, and can accurately and reliably evaluate the quality of the ultrasonic strengthening layer of the cement concrete specimen. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention will be further described below in conjunction with the accompanying drawings.

[0022] Figure 1 It is a structural schematic diagram of a device for measuring the thickness of an ultrasonic strengthening layer of cement concrete material;

[0023] Figure 2 is a schematic diagram of placing the concrete specimen to be measured on the sample table;

[0024] Figure 3 This is a typical schematic diagram of the cross section of the ultrasonic enhanced layer. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] A device for measuring the thickness of an ultrasonic strengthening layer of a cement concrete material, such as Figure 1 As shown, it comprises a sample stage 1, on which two parallel columns 2 are fixedly arranged, and on which glass grid plates 6 and a cross slide bracket 4 that can move up and down are sleeved;

[0027] Specifically, a grid plate bracket 3 is provided on the outer periphery of the glass grid plate 6, and the glass grid plate 6 is slidably sleeved on the column 2 through the grid plate bracket 3;

[0028] The glass grid plate 6 is made of transparent glass;

[0029] Specifically, in one embodiment, the column 2 can adopt a smooth rod structure, and the glass grid plate 6 and the cross slide bracket 4 are sleeved on the column 2 in an interference connection manner. When working, the glass grid plate 6 and the cross slide bracket 4 are manually controlled to move up and down on the column 2;

[0030] In order to ensure the stability of the glass grid plate 6 and the cross slide bracket 4 during operation, the glass grid plate 6 and the cross slide bracket 4 can be fixed by locking the knob 7;

[0031] A cross slide 5 is fixedly mounted on the cross slide bracket 4, and the cross slide 5 and the glass grid plate 6 are both arranged parallel to the sample stage 1;

[0032] An industrial camera 9 is slidably arranged on the cross slide 5. The industrial camera 9 can move along the cross slide 5 as shown in FIG. Figure 1 The x-axis direction shown reciprocates and slides;

[0033] Furthermore, the industrial camera 9 is also combined and fixedly connected with a telecentric lens 8. The telecentric lens 8 is used so that the imaging is not affected by the working distance, that is, to capture an image without deformation.

[0034] The glass grid plate 6 is provided with scale lines along the X and Y directions. In one embodiment of the present invention, the minimum scale in the Y direction is 0.1 mm, and the minimum scale in the X direction is 1 mm.

[0035] The X-direction guide rail of the cross slide 5 is marked with scale lines, and the scale lines are marked with a minimum scale of 1 mm on both sides with the midpoint of the guide rail as the 0 point.

[0036] The method for measuring the thickness of the ultrasonic reinforcement layer of cement concrete material by using the above-mentioned cement concrete material ultrasonic reinforcement layer thickness measuring device is as follows:

[0037] like Figure 2 As shown, a concrete specimen to be measured is placed on a sample table 1. During measurement, the cross section of the specimen with the ultrasonic strengthening layer is placed upward (in the positive direction of the Z axis), and the thickness direction of the strengthening layer is placed in the Y axis direction;

[0038] When shooting or imaging, first place the industrial camera 9 at the 0 point of the X-axis of the cross slide, and adjust the cross slide bracket in the Z-axis direction to make the image clearest, then adjust the grid plate bracket 3 to make the scale of the glass grid plate 6 clearest in the image, and at this time the scale on the grid plate overlaps with the image of the test piece;

[0039] Then adjust the position of the specimen so that the edge with the strengthening layer coincides with the X-axis in the imaging, and the center point of the strengthening layer coincides with the 0 point of the X-axis; read the thickness value of the strengthening layer at each point along the positive and negative directions of the X-axis according to the scale (i.e., the Y-axis scale).

[0040] The cross-sectional area of ​​the ultrasonic strengthening layer is defined by S UHL This index is used to evaluate the total cross-sectional area of ​​the strengthening layer that can be formed by a single ultrasonic transducer in a certain area.

[0041] The measurement method is to count the thickness of the strengthening layer within a certain X coordinate range in the image (Y coordinate). For example, when the X value is 100mm, the thickness of the strengthening layer within the range of 100mm on both sides of the X-axis 0 point needs to be measured, and then the total cross-sectional area S of the strengthening layer is calculated by integrating the thickness of each point. UHL . S UHL The calculation formula is:

[0042] Where: S UHL It indicates the cross-sectional area of ​​the ultrasonic strengthening layer that can be formed by a single ultrasonic transducer in a certain area;

[0043] x represents the distance from a certain measuring point to the origin with the center of the ultrasonic transducer as the coordinate origin;

[0044] h x represents the thickness Y of the ultrasonic strengthening layer at a distance x from the origin.

[0045] The uniformity of the ultrasonic strengthening layer is defined by U 100 This index is used to evaluate the uniformity of the strengthening layer formed by a single transducer in a certain area.

[0046] The measurement method is to count the thickness of the strengthening layer (Y coordinate) within a certain X coordinate range in the image. For example, the thickness of the strengthening layer (Y coordinate) at the X-axis coordinates of 0mm, -100mm, and +100mm is measured by a measuring device, and then the formula is used to calculate the thickness of the strengthening layer (Y coordinate). calculate:

[0047] Among them: U 100 It indicates the uniformity of the ultrasonic strengthening layer on the section passing through the center of the ultrasonic transducer as the origin, and its value is ≥1;

[0048] h0 represents the thickness of the ultrasonic strengthening layer at the zero point of the X coordinate;

[0049] h 100 、h -100 Indicates the thickness of the ultrasonic strengthening layer at 100mm and -100mm from the zero point respectively;

[0050] Typical ultrasonic strengthening layer cross section Figure 3 shown.

[0051] Generally speaking, U 100 The closer the corresponding value is to 1, the higher the uniformity of the formed strengthening layer.

[0052] The durability of concrete can be significantly improved by forming an ultrasonic strengthening layer on the surface of unhardened cement concrete material through ultrasonic high-frequency vibration. However, since the formation of the ultrasonic strengthening layer is affected by many factors such as ultrasonic frequency, power, action duration, action timing, and ultrasonic transducer (vibrator) installation method, its thickness distribution on the concrete surface is often uneven, and a good ultrasonic strengthening layer should be of uniform and continuous thickness. The present invention can conveniently and quickly detect the thickness distribution of the ultrasonic strengthening layer formed on the surface of cement concrete material. The staff can intuitively and quantitatively evaluate the quality of the ultrasonic strengthening layer through the test results. Generally speaking, the greater the thickness of the ultrasonic strengthening layer, the better, and the greater the thickness uniformity of the ultrasonic strengthening layer, the better.

[0053] The above contents are merely examples and explanations of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the invention or exceed the scope defined by the claims, they shall all fall within the protection scope of the present invention.

Claims

1. A device for measuring the thickness of an ultrasonic strengthening layer of a cement concrete material, characterized in that: The sample platform (1) comprises two mutually parallel upright posts (2) fixedly arranged on the sample platform (1), and a glass grid plate (6) and a cross slide bracket (4) which can move up and down are sleeved on the upright posts (2); The glass grid plate (6) is made of transparent glass; A cross slide (5) is fixedly mounted on the cross slide bracket (4), and the cross slide (5) and the glass grid plate (6) are both arranged parallel to the sample stage (1); An industrial camera (9) is slidably arranged on the cross slide (5), and the industrial camera (9) can slide back and forth along the X-axis direction on the cross slide (5); The glass grid plate (6) is provided with scale lines along the X and Y directions; The X-direction guide rail of the cross slide (5) is marked with scale lines.

2. The device for measuring the thickness of a cement concrete material ultrasonic strengthening layer according to claim 1, characterized in that: The column (2) adopts a smooth rod structure, and the glass grid plate (6) and the cross slide bracket (4) are both sleeved on the column (2) in an interference fit manner; During operation, the glass grid plate (6) and the cross slide bracket (4) can be fixed by means of a locking knob (7).

3. The device for measuring the thickness of a cement concrete material ultrasonic strengthening layer according to claim 2, characterized in that: The industrial camera (9) is assembled and fixedly connected with a telecentric lens (8).

4. A method for measuring the thickness of an ultrasonic strengthening layer of a cement concrete material, the method being performed by the thickness measuring device according to any one of claims 1 to 3, comprising the following steps: A concrete specimen to be measured is placed on a sample table (1), with the cross section of the specimen having an ultrasonic strengthening layer facing upwards and the thickness direction of the strengthening layer being placed in the Y-axis direction during measurement; When shooting or imaging, firstly place the industrial camera (9) at the 0 point of the X-axis of the cross slide, and adjust the cross slide bracket in the Z-axis direction to make the image clearest, then adjust the grid plate bracket (3) so that the scale of the glass grid plate (6) is clearest in the image; Adjust the position of the specimen so that the edge of the strengthening layer coincides with the X-axis in the imaging, and the center point of the strengthening layer coincides with the 0 point of the X-axis; read the thickness value of the strengthening layer at each point along the positive and negative directions of the X-axis according to the scale.

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