Flexible mounting seat and mass concrete crack monitoring device

Abstract

The utility model provides a flexible mounting base and a mass concrete crack monitoring device, and relates to the technical field of concrete.The flexible mounting base comprises a bottom plate, a through hole is formed in the center of the bottom plate, and mounting holes are formed in the periphery of the through hole; the sleeve is provided with a closed end and an open end, the sleeve is fixed on the bottom plate through the open end, the through hole is communicated with the open end, and the sleeve and the bottom plate form an acute included angle; the ultrasonic assembly is used for being arranged in the sleeve in a sliding mode, the ultrasonic assembly is an ultrasonic generator or an ultrasonic receiver, the ultrasonic assembly is further fixedly connected with a wedge block, the wedge block is close to the open end, the wedge block is provided with an inclined face attached to the concrete face, and the inclined face and the bottom plate can be coplanar; the axial adjusting assembly is arranged at the closed end, the axial adjusting assembly provides acting force in the axial direction of the sleeve for the ultrasonic assembly so that the inclined face can be tightly attached to the concrete plane, and the crack state of mass concrete can be monitored for a long time.

Description

Flexible mounting base and large-volume concrete crack monitoring device Technical Field

[0001] This utility model relates to the field of concrete technology, and in particular to a flexible mounting base and a large-volume concrete crack monitoring device. Background Technology

[0002] To alleviate the pressure on urban residents' living, working, and transportation needs, as well as the electricity demands brought about by industrialization, large-volume concrete structures such as (super) high-rise buildings, large-scale infrastructure projects, and water conservancy and hydropower projects have been successively constructed, creating a huge demand for large-volume concrete. However, during construction and use, large-volume concrete structures are prone to cracking due to factors such as temperature gradients and shrinkage stress. Furthermore, with the increasing complexity of external loads and the surrounding environment, cracks may continue to emerge and expand, affecting the structural safety and durability.

[0003] For large-volume concrete, ultrasonic monitoring is currently the primary method (e.g., CN220040336U). In ultrasonic monitoring, ultrasonic transmitting and receiving sensors are typically fixed in close contact with the surface of the concrete structure. The location of cracks is confirmed by utilizing the propagation of ultrasound within the concrete. Currently, there are two main methods for fixing ultrasonic transmitting and receiving sensors: one is to use adhesives to bond the sensors, and the other is to use mechanical fixation. In both of these methods, because crack monitoring often takes a long time, adhesives are susceptible to temperature and humidity fluctuations, and mechanical fixation is subject to complex stresses, making it difficult to maintain proper adhesion between the ultrasonic transmitting and receiving sensors and the concrete, thus affecting the accuracy of the data.

[0004] For the reasons mentioned above, this application provides an installation device and a monitoring device for an ultrasonic transceiver sensor. Summary of the Invention

[0005] This invention provides a flexible mounting base and a large-volume concrete crack monitoring device. Its purpose is to solve the problem of fixing the ultrasonic transceiver sensor when monitoring cracks in concrete using the existing ultrasonic method, and to ensure that the ultrasonic transceiver sensor can always be in close contact with the concrete wall during long-term monitoring.

[0006] To achieve the above objectives, embodiments of this utility model provide a flexible mounting base, comprising:

[0007] The base plate has a through hole in the center and mounting holes around the through hole;

[0008] A sleeve has a closed end and an open end. The sleeve is fixed to the base plate through the open end, and the through hole communicates with the open end. The sleeve and the base plate form an acute angle.

[0009] An ultrasonic component is slidably disposed within the sleeve. The ultrasonic component is an ultrasonic generator or an ultrasonic receiver. The ultrasonic component is also fixedly connected to a wedge. The wedge is near the open end and has an inclined surface that fits against the concrete surface. The inclined surface can be coplanar with the base plate.

[0010] An axial adjustment assembly is disposed at the closed end, the axial adjustment assembly providing an axial force to the ultrasonic assembly along the sleeve axis to make the inclined surface fit tightly against the concrete plane.

[0011] Preferably, a radial adjustment component is further provided on the radial side of the sleeve, the radial adjustment component providing a radial force to the ultrasonic component so that the ultrasonic axial adjustment component is coaxial with the sleeve.

[0012] Preferably, the axial adjustment assembly includes a first connecting rod for passing through the closed end of the sleeve. The two ends of the first connecting rod are respectively provided with a first inner limiting plate located inside the sleeve and a first outer limiting plate located outside the sleeve. A first elastic element is also sleeved on the first connecting rod. The two ends of the first elastic element abut against the first inner limiting plate and the closed end of the sleeve, respectively. The first elastic element is in a compressed state.

[0013] Preferably, the first connecting rod has an axial central through hole for the cable of the ultrasonic component to pass through the sleeve.

[0014] Preferably, the radial adjustment assembly includes a second connecting rod for passing through the side wall of the sleeve. The two ends of the second connecting rod are respectively provided with a second inner limiting plate located inside the sleeve and a second outer limiting plate located outside the sleeve. A second elastic unit is also sleeved on the second connecting rod. The two ends of the second elastic unit abut against the second inner limiting plate and the side wall of the sleeve, respectively. The second elastic unit is in a compressed state.

[0015] Preferably, the wedge is made of polyether ether copper material.

[0016] This application also provides a large-volume concrete crack monitoring device, comprising:

[0017] An ultrasonic generator for fixing to concrete, the ultrasonic generator is mounted on one side of the crack via the aforementioned flexible mounting base, the ultrasonic generator transmitting ultrasonic waves at a preset cycle;

[0018] The first and second ultrasonic receivers are mounted on the other side of the crack via the aforementioned flexible mounting base. The distance between the ultrasonic generator and the first ultrasonic receiver is less than the distance between the ultrasonic generator and the second ultrasonic receiver. The two ultrasonic receivers are used to receive ultrasonic waves reflected from the concrete.

[0019] The conversion unit is connected to two ultrasonic receivers and converts the acoustic signals into electrical signals.

[0020] A processing unit is connected to the conversion unit via a signal, and the processing unit is used to process electrical signals.

[0021] Preferably, the ultrasonic generator is further connected to a control box, which is used to control the period of ultrasonic waves emitted by the ultrasonic generator.

[0022] Preferably, the processing unit is further connected to an early warning unit, and the processing unit sends a control signal to the early warning unit to control the working state of the early warning unit.

[0023] The above-mentioned solution of this utility model has the following beneficial effects:

[0024] In this application, an axial adjustment component is used to apply axial force to the ultrasonic component, keeping the ultrasonic component in close contact with the concrete through the wedge, so that the ultrasonic component can adaptively maintain surface contact with the concrete plane, and can monitor the crack state of large-volume concrete for a long time.

[0025] Other features and advantages of this invention will be described in detail in the following detailed description section. Attached Figure Description

[0026] Figure 1 is a schematic diagram of the flexible mounting base;

[0027] Figure 2 is a cross-sectional view of the flexible mounting base;

[0028] Figure 3 is a schematic diagram of the axial adjustment assembly;

[0029] Figure 4 is a schematic diagram of signal transmission in a large-volume concrete crack monitoring device.

[0030] Figure 5 is a schematic diagram of the installation of a large-volume concrete crack monitoring device.

[0031] [Explanation of Labels in the Attached Image]

[0032] 100. Flexible mounting base

[0033] 110-Base plate, 120-Sleeve, 130-Ultrasonic assembly, 140-Wedge block, 150-Axial adjustment assembly, 151-First connecting rod, 152-First inner limiting plate, 153-First outer limiting plate, 154-First elastic element, 160-Radial adjustment assembly.

[0034] 200-Ultrasonic generator, 300-First ultrasonic receiver, 400-Second ultrasonic receiver, 500-Conversion unit, 600-Processing unit, 700-Control box, 800-Early warning unit.

[0035] S-crack Detailed Implementation

[0036] To make the technical problems, technical solutions and advantages of this utility model clearer, a detailed description will be given below in conjunction with the accompanying drawings and specific embodiments.

[0037] As shown in Figures 1-3, an embodiment of this utility model provides a flexible mounting base 100. The flexible mounting base 100 includes a base plate 110 with a through hole at its center and mounting holes around the through hole. The mounting holes are used to install bolts to ensure that the base plate 110 can be fixed to a concrete surface by screwing. A sleeve 120 is also provided on the base plate 110. The sleeve 120 has a closed end and an open end. The open end is fixed to the base plate 110 and communicates with the through hole. When the sleeve 120 and the base plate 110 are connected, they form an angle α, which is an acute angle. An ultrasonic component 130 is also provided inside the sleeve 120. The ultrasonic component 130 can slide along the axial direction of the sleeve 120 within it. Depending on the requirements, the ultrasonic component 130 can be either an ultrasonic generator 200 or an ultrasonic receiver. The ultrasonic component 130 is coaxial with the sleeve 120, ensuring that the ultrasonic component 130 is inclined relative to the concrete plane when emitting or capturing ultrasonic waves, thus ensuring that the ultrasonic waves can pass through the front and rear ends of the crack s during propagation. The ultrasonic component 130 is also fixedly connected to a wedge 140, which is located inside the sleeve 120 near the open end. The wedge 140 has an inclined surface for fitting against the concrete plane. An axial adjustment component 150 is also provided on the sleeve 120, located at the closed end, and provides a sliding force to the ultrasonic component 130 along the axial direction of the sleeve 120, ensuring that the inclined surface is coplanar with the base plate 110, thereby ensuring that the inclined surface is tightly attached to the concrete plane.

[0038] In this application, the base plate 110 is fixed to the concrete, which achieves the initial fixation of the ultrasonic component 130 and prevents the ultrasonic component 130 from falling off the concrete. At the same time, under the action of the axial adjustment component 150, the ultrasonic component 130 is kept in contact with the concrete plane during long-term monitoring, which ensures the propagation efficiency and data accuracy of the ultrasonic waves.

[0039] This application provides a specific structure for an axial adjustment assembly 150, including a first connecting rod 151, a first inner limiting plate 152 and a first outer limiting plate 153 disposed at both ends of the first connecting rod 151, and a first elastic element 154. A first through hole is provided at the closed end of the sleeve 120, the first connecting rod 151 passes through the first through hole, the first inner limiting plate 152 is located inside the sleeve 120, the first outer limiting plate 153 is located outside the sleeve 120, and the aforementioned first elastic element 154 is sleeved on the first connecting rod 151, with both ends of the first elastic element 154 abutting against the closed end and the first inner limiting plate 152, respectively. The ultrasonic axial adjustment assembly 150 is fixed on the first inner limiting plate 152, and the first elastic element 154 is in a compressed state in the initial state of the flexible mounting base 100 (i.e., when the flexible mounting base 100 is fixed to the concrete).

[0040] When the base plate 110 of the flexible mounting base 100 is fixed to the concrete, the wedge 140 moves towards the closed end under the resisting force of the concrete, causing the first elastic element 154 to be compressed and storing elastic potential energy. When the resisting force and the elastic force of the first elastic element 154 are equal, the wedge 140 stops moving and adheres to the concrete. Under long-term monitoring, even if the concrete generates complex stress, the first elastic element 154 ensures that the wedge 140 is always in contact with the concrete plane by passively releasing and storing elastic potential energy.

[0041] Compared to existing adhesive bonding methods, the flexible mounting base 100 provides more stable installation and is unaffected by temperature and humidity. Compared to traditional mechanical fixing methods for securing ultrasonic transceiver sensors, this application does not damage the ultrasonic transceiver sensors and can automatically ensure a good fit even under complex concrete stress and loose bolts.

[0042] Preferably, the first connecting rod 151 has an axial central through hole for the cable of the ultrasonic component 130 to pass through the sleeve 120.

[0043] Furthermore, in this application, a radial adjustment component 160 is provided in the radial direction of the sleeve 120. The radial adjustment component 160 is used to provide a radial force to the ultrasonic component 130 to ensure that the ultrasonic axial adjustment component 150 and the sleeve 120 remain coaxial at all times.

[0044] In this application, the radial adjustment assembly 160 has the same structure as the axial adjustment assembly 150, including a second connecting rod, a second outer limiting plate and a second inner limiting plate disposed at both ends of the second connecting rod, and a second elastic unit. The second outer limiting plate is located outside the sleeve 120, and the second inner limiting plate is located inside the sleeve 120. The second connecting rod passes through the side wall of the sleeve 120. One end of the second elastic unit abuts against the second inner limiting plate, and the other end abuts against the side wall of the sleeve 120.

[0045] In this application, the radial adjustment components 160 are arranged in pairs, with each pair of radial adjustment components 160 located on the same radial direction. In this embodiment, a pair of radial adjustment components 160 are provided. The two radial adjustment components 160 act on the ultrasonic component 130 respectively, thereby ensuring that the ultrasonic component 130 and the sleeve 120 are coaxial, so that the force of the first elastic element 154 acts entirely on the ultrasonic component 130 and the wedge 140, avoiding the component force generated by the misalignment affecting the adhesion effect between the wedge 140 and the wall.

[0046] Preferably, both the first elastic element 154 and the second elastic element are springs.

[0047] Preferably, the wedge 140 is made of polyether ether copper material.

[0048] Referring to Figures 4 and 5, this application also provides a large-volume concrete crack monitoring device, which uses the aforementioned flexible mounting base 100 to fix the ultrasonic component 130, monitors the changes in crack S inside the concrete, and ensures the safe operation of large-volume concrete.

[0049] The large-volume concrete crack monitoring device includes an ultrasonic generator 200 and two ultrasonic receivers, namely a first ultrasonic receiver 300 and a second ultrasonic receiver 400. The ultrasonic generator 200 and the two ultrasonic receivers are fixed to the concrete and kept in close contact by the aforementioned flexible mounting base 100. Specifically, the ultrasonic generator 200 is located on one side of the crack S, and the two ultrasonic receivers are located on the other side of the crack S. The distance between the ultrasonic generator 200 and the first ultrasonic receiver 300 is less than the distance between the ultrasonic generator 200 and the second ultrasonic receiver 400.

[0050] The monitoring device also includes a conversion unit 500 and a processing unit 600. The processing unit 600 is signal-connected to the conversion unit 500, and the conversion unit 500 is signal-connected to two ultrasonic receivers. When the two ultrasonic receivers capture the reflected ultrasonic waves, the conversion unit 500 converts the acoustic signals into electrical signals. The processing unit 600 processes the electrical signals to obtain the specifications (length, width, and depth) of the crack S.

[0051] Preferably, the ultrasonic generator 200 is also connected to a control box 700, which is used to control the period of ultrasonic waves emitted by the ultrasonic generator 200. In this embodiment, the control box 700 is a self-triggering ultrasonic control box.

[0052] Preferably, the processing unit 600 is also signal-connected to the early warning unit 800, and the processing unit 600 can send a control signal to the early warning unit 800 to control the working state of the early warning unit 800.

[0053] In this application, the conversion unit 500 is a digital oscilloscope, and the processing unit 600 is a PC or a microcontroller, etc. The warning unit 800 can be a conventional warning light or alarm bell, or a wireless communication module that can be triggered by a control signal and connected to a designated handheld device.

[0054] The large-volume concrete crack monitoring device also includes a power supply unit to power the ultrasonic component 130, conversion unit 500, processing unit, control box 700, and early warning unit 800.

[0055] The above description is the preferred embodiment of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications should also be considered within the protection scope of this utility model.

Claims

1. A flexible mounting base, characterized in that, include: A base plate has a through hole at its center and mounting holes around the through hole; a sleeve has a closed end and an open end, the sleeve is fixed to the base plate through the open end, and the through hole communicates with the open end, the sleeve and the base plate form an acute angle; an ultrasonic component, which is an ultrasonic generator or an ultrasonic receiver, is slidably disposed within the sleeve, the ultrasonic component is also fixedly connected to a wedge, the wedge is near the open end, the wedge has an inclined surface that conforms to the concrete surface, the inclined surface can be coplanar with the base plate; an axial adjustment component is disposed at the closed end, the axial adjustment component provides an axial force to the ultrasonic component along the sleeve to make the inclined surface tightly conform to the concrete surface.

2. The flexible mounting base according to claim 1, characterized in that: The sleeve is further provided with a radial adjustment component, which provides a radial force to the ultrasonic component to make the ultrasonic axial adjustment component coaxial with the sleeve.

3. The flexible mounting base according to claim 2, characterized in that: The axial adjustment assembly includes a first connecting rod for passing through the closed end of the sleeve. The two ends of the first connecting rod are respectively provided with a first inner limiting plate located inside the sleeve and a first outer limiting plate located outside the sleeve. A first elastic element is also sleeved on the first connecting rod. The two ends of the first elastic element abut against the first inner limiting plate and the closed end of the sleeve, respectively. The first elastic element is in a compressed state.

4. The flexible mounting base according to claim 3, characterized in that: The first connecting rod has an axial central through hole for the cable of the ultrasonic component to pass through the sleeve.

5. The flexible mounting base according to claim 2, characterized in that: The radial adjustment assembly includes a second connecting rod for passing through the side wall of the sleeve. The two ends of the second connecting rod are respectively provided with a second inner limiting plate located inside the sleeve and a second outer limiting plate located outside the sleeve. A second elastic unit is also sleeved on the second connecting rod. The two ends of the second elastic unit abut against the second inner limiting plate and the side wall of the sleeve, respectively. The second elastic unit is in a compressed state.

6. The flexible mounting base according to claim 1, characterized in that: The wedge is made of polyether ether copper material.

7. A large-volume concrete crack monitoring device, characterized in that, include: An ultrasonic generator fixed to concrete, wherein the ultrasonic generator is disposed on one side of a crack via a flexible mounting base as described in any one of claims 1-6, and the ultrasonic generator transmits ultrasonic waves at a preset period; a first ultrasonic receiver and a second ultrasonic receiver, wherein the two ultrasonic receivers are disposed on the other side of the crack via the flexible mounting base as described in any one of claims 1-6, and the distance between the ultrasonic generator and the first ultrasonic receiver is less than the distance between the ultrasonic generator and the second ultrasonic receiver; the two ultrasonic receivers are used to receive ultrasonic waves reflected from the concrete; a conversion unit is signal-connected to the two ultrasonic receivers and converts the acoustic signal into an electrical signal; and a processing unit is signal-connected to the conversion unit and is used to process the electrical signal.

8. The large-volume concrete crack monitoring device according to claim 7, characterized in that: The ultrasonic generator is also connected to a control box, which is used to control the period of ultrasonic waves emitted by the ultrasonic generator.

9. The large-volume concrete crack monitoring device according to claim 7, characterized in that: The processing unit is also connected to an early warning unit, and the processing unit sends a control signal to the early warning unit to control the working status of the early warning unit.

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