A method for detecting dimensional changes in concrete for flooring and a magnetic block positioning device

Abstract

This invention relates to the technical field of floor testing, specifically to a method for detecting dimensional changes in concrete and a magnetic block positioning device for concrete floors. The method includes the following steps: S1: Before the concrete initially sets, magnetic blocks are placed inside a designated location within the concrete, and the initial positions of several magnetic blocks are recorded. S2: When dimensional changes need to be measured, iron powder is sprinkled above the initial position of the corresponding magnetic block, and the point where the iron powder is most densely distributed after falling is recorded as the changed position of the magnetic block. S3: The changed position of the magnetic block is compared with its initial position to determine the changed dimensions of the concrete. The iron powder sprinkled onto the concrete surface gathers and falls directly above the magnetic block under its influence, thus locating the shifted position of the magnetic block. Comparing the initial and changed positions of the magnetic block reveals its shift. This method reveals the changes in the concrete, facilitating direct measurement using conventional measuring tools and making the measurement of concrete dimensional changes convenient.

Description

Technical Field

[0001] This invention relates to the technical field of floor testing, and more specifically, to a method for detecting dimensional changes in concrete specifically for flooring and a magnetic block positioning device. Background Technology

[0002] During the hardening process of concrete, shrinkage or expansion occurs, causing changes in the dimensions of the floor. Large or small dimensional changes can lead to excessive stress within the floor, potentially causing cracking and other risks. Therefore, it is necessary to monitor dimensional changes during concrete hardening and develop appropriate solutions based on these changes. However, current technology lacks specific devices and methods for detecting these dimensional changes, making the measurement of this data extremely inconvenient. Summary of the Invention

[0003] The purpose of this invention is to provide a method for detecting changes in the dimensions of concrete specifically for flooring, and a magnetic block positioning device, which can conveniently detect changes in the dimensions of concrete.

[0004] The embodiments of the present invention are achieved through the following technical solutions:

[0005] A method for detecting dimensional changes in concrete specifically designed for flooring includes the following steps:

[0006] S1: Before the concrete initially sets, place magnetic blocks inside the concrete at a specified location and record the initial positions of several magnetic blocks.

[0007] S2: When it is necessary to measure the change in size, iron powder is sprinkled above the initial position of the corresponding magnetic block, and the point where the iron powder is most densely distributed after falling is recorded as the changed position of the magnetic block.

[0008] S3: Compare the changed position of the magnetic block with its initial position to determine the change in concrete size.

[0009] Furthermore, it also includes a single-point size change detection method, which involves comparing the initial position and the changed position of a single magnetic block to obtain the size of the position change of the magnetic block.

[0010] Furthermore, it also includes a multi-point size change detection method, which involves comparing the initial position relationship and the changed position relationship of any two magnetic blocks to obtain the position change size of the two magnetic blocks.

[0011] Furthermore, the magnetic block is spherical.

[0012] Furthermore, the magnetic block is inserted into the concrete to a depth of 1-5 cm.

[0013] Furthermore, the magnetic block is a permanent magnet.

[0014] Furthermore, the magnetic block is an iron block; it also includes a magnetizing mechanism; the magnetizing mechanism is equipped with a magnet; before the iron powder is sprinkled, the magnetizing mechanism is placed above the initial position of the magnetic block to magnetize the magnetic block; then the magnetizing mechanism is removed before the iron powder is sprinkled.

[0015] Furthermore, the magnetization mechanism is equipped with an electromagnet or a permanent magnet.

[0016] A magnetic block positioning device includes a vibrating plate and a support disposed at the lower part of the vibrating plate.

[0017] Furthermore, the vibrating plate is a transparent plate; the vibrating plate is hollow and filled with iron powder; the vibrating plate is also equipped with a vibration motor.

[0018] The technical solutions of the embodiments of the present invention have at least the following advantages and beneficial effects:

[0019] This invention incorporates magnetic blocks into the concrete, causing iron powder thrown onto the concrete surface to gather and fall directly above the magnetic blocks. The center of the iron powder accumulation area is the current position of the magnetic block, thus pinpointing its offset location. Comparing the initial and changed positions of the magnetic block reveals its offset. Since the magnetic block is embedded within the concrete, its offset mirrors the flow of the concrete. Therefore, the movement of the magnetic block is equivalent to the change in the size of the concrete. This method reveals the changes in the concrete, facilitating direct measurement using conventional measuring tools and enabling convenient measurement of concrete variations.

[0020] The spherical shape of the magnetic block eliminates its sharp edges, making it easier to move and adapt to changes in the size of the concrete. This also causes its magnetic field to concentrate in a circular pattern on the concrete surface, resulting in a circular area of ​​iron powder accumulation. The center of this circle is the current location of the magnetic block, making it easy to determine the center.

[0021] By setting the magnetic block to an iron block, it can be magnetized using a magnetization device when a magnetic field is needed. It will gradually demagnetize after measurement. This design is well-suited for special scenarios where magnetic fields are not permitted on certain surfaces.

[0022] The magnetic block positioning device uses a vibrating motor to agitate the iron powder inside, creating an iron powder accumulation zone and avoiding the inconvenience of manually sprinkling iron powder. Furthermore, the magnetic block positioning device can be used for positioning the magnetic blocks at various stages of concrete curing, allowing for the detection of concrete dimensional changes at any etching point. If iron powder is directly sprinkled onto the concrete surface, it may mix into the concrete, therefore measurements can only be taken after the concrete has completely solidified. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the magnetic block inside the concrete.

[0025] Figure 2 This is a schematic diagram of a magnetic block positioning device.

[0026] Icons: 1-Concrete, 2-Magnetic block, 3-Iron powder, 4-Vibrating plate, 5-Support, 6-Vibrating motor. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0028] Example:

[0029] like Figure 1 and Figure 2 As shown, the present invention provides a method for detecting dimensional changes in concrete 1 specifically for flooring, comprising the following steps:

[0030] S1: Before the initial setting of concrete 1, place magnetic blocks 2 inside designated locations within concrete 1 and record the initial positions of several magnetic blocks 2. Concrete 1 is leveled and vibrated before initial setting. At this time, no further manipulation is performed on concrete 1, which is in a stable state. The magnetic blocks 2 will not move due to external forces after placement. Simultaneously, concrete 1 is in a fluid state at this point, facilitating the placement of magnetic blocks 2. Specifically, press the magnetic blocks 2 into the interior of concrete 1 and smooth out any resulting indentations. The placement position of the magnetic blocks 2 can be set as needed. Magnetic blocks 2 can be magnets, as long as they possess magnetism.

[0031] S2: When measuring dimensional changes, iron powder 3 is sprinkled above the initial position of the corresponding magnetic block 2, and the point where the iron powder 3 is most densely distributed after falling is recorded as the changed position of the magnetic block 2. The smaller the particle size of the iron powder 3, the better, as it is more easily attracted under the influence of a weak magnetic field. The timing of the measurement can be set as needed, and can be any time after initial coagulation. During the falling process, the iron powder 3 will concentrate and fall to the ground directly above the magnetic block 2 under the influence of the magnetic field, eventually forming a dense area of ​​iron powder 3 directly above the magnetic block 2. The center of this area can be defined as the changed position of the magnetic block 2.

[0032] S3: Compare the changed position of magnetic block 2 with its initial position to determine the change in size of concrete 1. In the horizontal plane, define the initial position of magnetic block 2 as the origin and establish a coordinate system. The offset of the changed position relative to the origin can be considered as the degree of shrinkage or expansion during the solidification process of concrete 1. Specifically, set the initial positions of several magnetic blocks 2 according to the characteristics of concrete 1. For example, two magnetic blocks 2 can be placed in concrete 1 at a distance of one meter. The distance between the two magnetic blocks 2 that increases or decreases during testing represents the size of the expansion or contraction of concrete 1.

[0033] This invention incorporates a magnetic block 2 into the concrete 1, causing iron powder 3 sprayed onto the surface of the concrete 1 to gather and fall directly above the magnetic block 2. The center of the iron powder 3 gathering area is the current position of the magnetic block 2, thus pinpointing its offset position. Comparing the initial and changed positions of the magnetic block 2 reveals its offset. Since the magnetic block 2 is embedded within the concrete 1, its offset corresponds to the flow of the concrete 1. Therefore, the movement of the magnetic block 2 is equivalent to the change in the size of the concrete 1. This method reveals the changes in the concrete 1, facilitating direct measurement using conventional measuring tools. Furthermore, the magnetic block 2, embedded within the concrete 1, does not leave any marks on the surface, ensuring the quality of the flooring.

[0034] The more magnetic blocks 2 are placed, the richer the conclusions that can be drawn from the analysis. The number of magnetic blocks 2 can also be set as needed. For example, magnetic blocks 2 can be evenly distributed throughout the entire floor, and the movement patterns of all magnetic blocks 2 can be observed to study the dimensional and directional changes during the solidification process of large-area concrete 1.

[0035] This embodiment also includes a single-point size change detection method, which involves comparing the initial position and the changed position of a single magnetic block 2 to determine the size of the position change of the magnetic block 2. This method allows for the analysis of the movement of a single magnetic block 2.

[0036] This embodiment also includes a multi-point size change detection method, which involves comparing the initial position relationship and the changed position relationship of any two magnetic blocks 2 to determine the size change of the position of the two magnetic blocks 2. This method can measure the changes of concrete 1 within a certain range.

[0037] In this embodiment, the magnetic block 2 is spherical. The spherical shape of the magnetic block 2 eliminates sharp edges, making it easier to move and adapt to changes in the size of the concrete 1. This also causes its magnetic field to concentrate in a circular pattern on the surface of the concrete 1, resulting in a circular area where the iron powder 3 accumulates. The center of this circle is the current location of the magnetic block 2, facilitating center determination.

[0038] In this embodiment, the magnetic block 2 is inserted into the concrete 1 to a depth of 1-5 cm. This depth ensures the embedment depth of the magnetic block 2 in the concrete 1, guaranteeing the thickness and strength of the concrete 1. It also ensures the magnetic field strength of the magnetic block 2 on the surface of the concrete 1.

[0039] In this embodiment, magnetic block 2 is a permanent magnet. For floors without special requirements, magnets can be directly embedded as magnetic block 2.

[0040] In this embodiment, the magnetic block 2 is an iron block. A magnetizing mechanism is also included. The magnetizing mechanism is equipped with a magnet. Before the iron powder 3 is sprinkled, the magnetizing mechanism is placed above the initial position of the magnetic block 2 to magnetize it. Then the magnetizing mechanism is removed before the iron powder 3 is sprinkled.

[0041] By setting magnetic block 2 to an iron block, it can be magnetized using a magnetization device when a magnetic field is needed. It will gradually demagnetize after measurement. This design is well-suited for special scenarios where magnetic fields are not permitted on certain surfaces, such as AGV warehouses where magnetic induction guidance devices need to be installed on the ground.

[0042] In this embodiment, the magnetization mechanism is equipped with an electromagnet or a permanent magnet. Any magnet that can generate a strong magnetic field and magnetize the magnetic block 2 is acceptable.

[0043] The present invention also provides a magnetic block 2 positioning device, including a vibrating plate 4 and a support 5 disposed at the lower part of the vibrating plate 4. Figure 2 As shown, the bracket 5 supports the vibrating plate 4. During measurement, the positioning device is placed above the initial position of the magnetic block 2, and the iron powder 3 is sprinkled onto the vibrating plate 4. The vibrating plate 4 can also be tapped to make it vibrate, thus allowing the iron powder 3 to better form an accumulation area on the vibrating plate 4. This avoids the hassle of cleaning up after directly sprinkling the iron powder 3 onto the concrete 1 surface.

[0044] In this embodiment, the vibrating plate 4 is a transparent plate. The vibrating plate 4 is hollow and filled with iron powder 3. The vibrating plate 4 is also equipped with a vibration motor 6. In use, the vibrating plate 4 is first shaken to evenly distribute the iron powder 3 on the vibrating plate 4. Then, the vibrating plate 4 is placed above the initial position of the magnetic block 2 and vibrated by the vibration motor 6 to form an area where the iron powder 3 accumulates. This further reduces the difficulty of operation.

[0045] Iron powder 3 is placed inside the vibrating plate 4 to form a whole, which better avoids the trouble of cleaning up the iron powder 3 after it is spilled. The transparent vibrating plate 4 makes it easy to observe the area where the iron powder 3 accumulates inside, and also makes it easy to observe the surface of the concrete 1 through the vibrating plate 4, so as to determine the position of the magnetic block 2 on the surface of the concrete 1. The bracket 5 supports the vibrating plate 4 and also makes it easy to insert a marker or other device under the vibrating plate 4 to mark the position of the magnetic block 2.

[0046] Meanwhile, the magnetic block 2 can be positioned by the positioning device during each stage of the concrete 1's solidification process, allowing the detection of changes in the concrete 1's dimensions to be performed at any etching point. If iron powder 3 is directly sprinkled onto the surface of the concrete 1, the iron powder 3 may mix into the interior of the concrete 1; therefore, measurements can only be taken after the concrete 1 has completely solidified.

[0047] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A method for detecting size variation in a floor-specific concrete, characterized by: It comprises the following steps: S1: placing magnetic blocks into the interior of the concrete at specified positions before the initial setting of the concrete and recording the initial positions of the magnetic blocks; S2: when the size change needs to be measured, iron powder is scattered above the initial positions of the magnetic blocks, and the point where the iron powder is most densely distributed after falling is recorded as the changed position of the magnetic block; S3: comparing the changed position and the initial position of the magnetic block to obtain the size change of the concrete.

2. The method of claim 1, wherein: It also comprises a single-point size change detection method, which compares the initial position and the changed position of a single magnetic block to obtain the position change size of the magnetic block.

3. The method of claim 2, wherein: It also comprises a multi-point size change detection method, which compares the relationship between the initial positions of any two magnetic blocks and the relationship between the changed positions to obtain the position change size of the two magnetic blocks.

4. The method of claim 3, wherein: The magnetic blocks are spherical.

5. The method of claim 4, wherein: The depth of the magnetic blocks placed in the interior of the concrete is 1-5 cm.

6. The method of claim 5, wherein: The magnetic blocks are permanent magnets.

7. The method of claim 5, wherein: The magnetic blocks are iron blocks; the magnetizing mechanism is provided with a magnet; before the iron powder is scattered, the magnetizing mechanism is placed above the initial position of the magnetic block to magnetize the magnetic block; then the magnetizing mechanism is removed and the iron powder is scattered.

8. The method of claim 7, wherein: The magnetizing mechanism is provided with an electromagnet or a permanent magnet.

9. A magnetic block positioning device, which is used in cooperation with the method for detecting size variation of the concrete for a floor slab as claimed in any one of claims 1 to 8, characterized in that: It comprises a vibrating plate and a support provided at the lower part of the vibrating plate; when detecting, the iron powder is scattered on the vibrating plate.

10. The magnetic block positioning apparatus of claim 9, wherein: The vibrating plate is a transparent plate; the vibrating plate is hollow and filled with iron powder inside; the vibrating plate is also provided with a vibrating motor.

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