A multifunctional detection device based on magnetic field detection

Abstract

The utility model discloses a multifunctional detection device based on magnetic field detection, which is used for detecting concrete reinforcement cages and underground pipelines, and comprises: a casing, the head end of which is used for connecting a cable to realize the transmission of signals and power and the function of a traction rope; a first magnetic gradient element, which is fixedly arranged inside the casing and is used for emitting a magnetic field; a second magnetic gradient element, which is fixedly arranged inside the casing and is coaxial with the first magnetic gradient element and is used for receiving the magnetic field reflected by the reinforcement cage; a PCB board, which is fixedly arranged inside the casing and is electrically connected to the first magnetic gradient element, the second magnetic gradient element and the cable respectively, and is used for sending and receiving information and processing detection data; a gyroscope, which is arranged on the PCB board and is used for detecting the posture of the device; the utility model can not only accurately detect the position and length of the reinforcement cage, but also determine the buried depth, direction and verticality of the buried pipeline, thereby greatly improving the efficiency and accuracy of engineering construction.

Description

Technical Field

[0001] The utility model relates to the technical field of building construction detection, in particular to a multifunctional detection device based on magnetic field detection. Background Art

[0002] In building pile foundation projects, concrete piling is a crucial construction link. In order to ensure the stability and bearing capacity of the pile foundation, a steel cage is usually placed in the concrete pile. However, since the steel cage is embedded in the concrete, its sinking depth and length are difficult to accurately measure by conventional detection methods. This technical difficulty makes it impossible to effectively evaluate the accuracy of the steel cage placement, which may affect the quality and safety of the entire pile foundation project.

[0003] At the same time, in underground pipeline projects, the buried depth of the pipeline is also a key parameter. At present, although there are technologies such as visual depth detection devices for detecting the buried depth of underground pipelines, these devices can often only detect pipelines and cannot meet the detection needs of steel cages at the same time.

[0004] On the construction site, using two different devices to inspect the steel cage and underground pipelines separately is not only cumbersome but also inefficient. More importantly, this decentralized inspection method may increase errors and uncertainties, affecting the control of project quality and the prevention of safety risks. Summary of the invention

[0005] The purpose of the utility model is to provide a multifunctional detection device based on magnetic field detection to solve the problems existing in the prior art. It can not only accurately detect the position and length of the steel cage, but also determine the buried depth, direction and verticality of the buried pipeline, greatly improving the efficiency and accuracy of engineering construction.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0007] A multifunctional detection device based on magnetic field detection is used for detecting concrete reinforcement cages and underground pipelines, comprising: a casing, the head end of which is used to connect a cable to achieve signal and power transmission and to function as a traction rope; a first magnetic gradient element, fixedly arranged inside the casing, for emitting a magnetic field; a second magnetic gradient element, fixedly arranged inside the casing, coaxial with the first magnetic gradient element, for receiving a reflected magnetic field; a PCB board, fixedly arranged inside the casing, and electrically connected to the first magnetic gradient element, the second magnetic gradient element and the cable, respectively, for sending and receiving information and processing detection data; a gyroscope, arranged on the PCB board, for detecting the posture of the device.

[0008] The device also includes: a connector assembly, which is detachably connected to the head end of the sleeve, and the cable is fixedly passed through the connector assembly; an upper nylon part, whose head end is connected to the connector assembly and whose tail end is connected to the first magnetic gradient element; a lower nylon part, whose head end is connected to the first magnetic gradient element and whose tail end is connected to the second magnetic gradient element, and the PCB board is fixedly arranged on the lower nylon part.

[0009] The joint assembly, the upper nylon component, the first magnetic gradient element, the lower nylon component, the PCB board and the second magnetic gradient element form an integrated insertion assembly, which is inserted into the sleeve as a whole.

[0010] The connector assembly includes: an upper plug mounting seat, which has an external thread at its head end and both external and internal threads at its tail end, wherein the external thread at the tail end of the upper plug mounting seat is used to connect with the head end of the sleeve, and the internal thread at the tail end is used to connect with the upper nylon part; an upper plug, which is inserted into the head end of the upper plug mounting seat and is provided with a convex ring for abutting against the head end port of the upper plug mounting seat; an upper plug pressure cover, which has an internal thread at one end for matching and connecting with the external thread at the head end of the upper plug mounting seat, and a narrow opening at the other end for abutting against the convex ring.

[0011] The tail end of the sleeve is detachably connected with a sleeve head for closing the sleeve and radially limiting the second magnetic gradient element.

[0012] The gyroscope is a nine-axis gyroscope, which collects nine-axis data in real time, including three-axis magnetic field strength, three-axis acceleration, and three-axis angular velocity.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] This device can not only accurately detect the position and length of the steel cage, but also determine the buried depth, direction and verticality of the buried pipeline. This dual detection function greatly improves the efficiency and accuracy of engineering construction;

[0015] By using highly sensitive magnetic sensors as magnetic gradient elements, the device can accurately measure tiny magnetic field changes, thereby accurately detecting the position and length of the steel cage within the magnetic field range of the foundation pit, as well as the buried depth of the buried pipeline;

[0016] By setting the real-time posture of the gyroscope detection device, the inclination direction of the buried pipeline can be detected, and the motion trajectory of the device in three-dimensional space can be further drawn to intuitively reflect the direction and verticality of the pipeline. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is an overall cross-sectional view of a detection device in one embodiment of the present application;

[0018] Figure 2 A partial cross-sectional view of the first end of a detection device in one embodiment of the present application;

[0019] Figure 3 A partial cross-sectional view of the tail end of a detection device in one embodiment of the present application;

[0020] In the figure: 1, sleeve; 2, first magnetic gradient element; 3, second magnetic gradient element; 4, PCB board; 5, connector assembly; 6, upper nylon part; 7, lower nylon part; 8, upper plug mounting seat; 9, upper plug; 10, upper plug gland; 11, sleeve. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the utility model to clearly and completely describe the technical solution of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "vertical", "horizontal", "inner", "outer", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, or the orientation or position relationship in which the utility model product is usually placed when in use, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0023] In addition, the terms "horizontal", "vertical" and the like do not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0024] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0025] like Figures 1 to 3 As shown, a multifunctional detection device based on magnetic field detection is used for detecting concrete reinforcement cages and underground pipelines, comprising: a casing 1, a first end of which is connected to a cable for signal transmission, power transmission and as a traction rope; a first magnetic gradient element 2, fixedly arranged inside the casing 1, for emitting a magnetic field; a second magnetic gradient element 3, fixedly arranged inside the casing, for receiving a returned magnetic field; a PCB board 4, fixedly arranged inside the casing 1, and electrically connected to the first magnetic gradient element 2, the second magnetic gradient element 3 and the cable, respectively, for receiving and sending information and processing detection data; a gyroscope, arranged on the PCB board 4, for detecting the posture of the device.

[0026] When the device moves vertically downward in the borehole, it can continuously monitor the steel cage and underground pipelines, and send the collected data back to the ground host in real time. After receiving the data, the ground host can generate a continuous detection magnetic field curve in the hole wall. The operator can very accurately detect the position and length of the steel cage within the magnetic field range of the foundation pit, as well as the buried depth of the underground pipeline according to the strength of the magnetic field.

[0027] The magnetic gradient element can be composed of highly sensitive magnetic sensors that can accurately measure tiny magnetic field changes. In building pile foundation projects, the magnetic field changes caused by the steel cage and underground pipes will be sensed by the magnetic gradient element and generate corresponding electrical signals.

[0028] Specifically in this embodiment, when the magnetic field emitted by the first magnetic gradient element 2 encounters a steel cage or an underground pipeline, due to the electrical conductivity and magnetic permeability of the steel bars or the underground pipeline, the magnetic field will be reflected, scattered or concentrated, and these changes will be captured by the second magnetic gradient element 3 and converted into electrical signals for subsequent processing and analysis.

[0029] In addition, by placing the device into an underground pipeline, it can also be used to determine the direction and verticality of the underground pipeline, providing important data support for engineering construction.

[0030] The gyroscope of this device can adopt a nine-axis gyroscope to collect nine-axis data in real time, including three-axis magnetic field strength, three-axis acceleration, and three-axis angular velocity. After data fusion, quaternion is output to represent rotation and direction in three-dimensional space, which can accurately reflect the real-time posture of the device, thereby detecting the inclination direction of the buried pipeline; further, by calculating and drawing the motion trajectory of the device in three-dimensional space, the operator can intuitively understand the direction and verticality of the pipeline.

[0031] In summary, the device of this embodiment can not only accurately detect the position and length of the steel cage, but also determine the buried depth, direction and verticality of the buried pipeline. This dual detection function greatly improves the efficiency and accuracy of engineering construction.

[0032] By using highly sensitive magnetic sensors as magnetic gradient elements, the device can accurately measure tiny magnetic field changes, thereby accurately detecting the position and length of the steel cage within the magnetic field range of the foundation pit, as well as the buried depth of the buried pipeline;

[0033] By setting the real-time posture of the gyroscope detection device, the inclination direction of the buried pipeline can be detected, and the movement trajectory of the device in three-dimensional space can be further plotted. The operator can intuitively understand the direction and verticality of the pipeline, providing important data support for engineering construction, which is helpful for engineering quality control and safety risk prevention.

[0034] In some embodiments, the device further includes: a connector assembly 5, which is detachably connected to the first end port of the sleeve 1, and the cable is fixed to the connector assembly; an upper nylon part 6, whose first end is connected to the connector assembly 5 and whose second end is connected to the first magnetic gradient element 2; a lower nylon part 7, whose first end is connected to the first magnetic gradient element 2 and whose second end is connected to the second magnetic gradient element 3, and a PCB board 4 is fixed to the lower nylon part 7. By introducing the connector assembly, the upper nylon part and the lower nylon part, the device realizes a modular design, which is convenient for maintenance, replacement and upgrading of each component. The nylon part enhances the physical stability of the device and reduces vibration and displacement during the detection process.

[0035] In some embodiments, the connector assembly 5, the upper nylon member 6, the first magnetic gradient element 2, the lower nylon member 7, the PCB board 4 and the second magnetic gradient element 3 form an integrated insertion assembly, which is inserted as a whole into the casing 1. This design greatly simplifies the installation and disassembly process, improves the convenience of assembly, transportation and use, and also enhances the stability and reliability of the entire magnetic field detection system.

[0036] In some embodiments, the connector assembly 5 includes: an upper plug mounting seat 8, the first end of which is provided with an external thread, and the second end is provided with an external thread and an internal thread, the second end of the upper plug mounting seat 8 is connected to the first end port of the sleeve 1 through the external thread, and is connected to the upper nylon member 6 through the internal thread; an upper plug 9, which is inserted into the first end of the upper plug mounting seat 8 and is provided with a convex ring that abuts against the first end port of the upper plug mounting seat 8; an upper plug gland 10, one end of which is provided with an internal thread, which is matched and connected with the external thread of the first end of the upper plug mounting seat 8, and the other end is provided with a narrow opening that abuts against the convex ring. The design of the connector assembly not only ensures the stability and reliability of the cable connection, but also improves the durability and service life of the entire device, while simplifying the installation and maintenance process.

[0037] It should be noted that those skilled in the art can easily think that the links that need to be connected in the present application can use double O-ring lateral sealing to ensure the sealing effect.

[0038] In some embodiments, the second end of the sleeve 1 is detachably connected with a sleeve head 11 for closing the sleeve 1 and radially limiting the second magnetic gradient element 3. By radially limiting the second magnetic gradient element, it is possible to prevent it from affecting the accuracy of the detection result due to movement.

[0039] In some embodiments, the gyroscope is a nine-axis gyroscope, which collects nine-axis data in real time, including three-axis magnetic field strength, three-axis acceleration, and three-axis angular velocity.

[0040] Specifically, the nine-axis gyroscope includes: a three-axis gyroscope, which is used to detect the rotation state of the device in space; a three-axis accelerometer, which is used to detect the motion state of an object and measure the acceleration changes of the object in three axial directions; and a three-axis magnetometer, which is used to detect the magnetic field strength in three-axis directions.

[0041] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A multifunctional detection device based on magnetic field detection, used for the detection of steel cages and underground pipelines, characterized in that: include: The casing (1) has a first end for connecting a cable to achieve signal and power transmission and to function as a traction rope; A first magnetic gradient element (2) is fixedly arranged inside the casing (1) and is used to emit a magnetic field; A second magnetic gradient element (3) is fixedly arranged inside the sleeve and coaxial with the first magnetic gradient element (2), and is used to receive the reflected magnetic field; A PCB board (4) is fixedly arranged inside the sleeve (1) and is electrically connected to the first magnetic gradient element (2), the second magnetic gradient element (3) and the cable respectively, and is used for sending and receiving information and processing detection data; A gyroscope is arranged on the PCB board (4) to detect the posture of the device.

2. A multifunctional detection device based on magnetic field detection according to claim 1, characterized in that: include: A connector assembly (5) detachably connected to the head end of the sleeve (1), the cable fixedly passing through the connector assembly; An upper nylon component (6), the head end of which is connected to the joint assembly (5) and the tail end of which is connected to the first magnetic gradient element (2); A lower nylon part (7) has a head end connected to the first magnetic gradient element (2) and a tail end connected to the second magnetic gradient element (3), and the PCB board (4) is fixedly arranged on the lower nylon part (7).

3. A multifunctional detection device based on magnetic field detection according to claim 2, characterized in that: The joint assembly (5), the upper nylon component (6), the first magnetic gradient element (2), the lower nylon component (7), the PCB board (4) and the second magnetic gradient element (3) form an integrated insertion assembly, which is inserted into the sleeve (1) as a whole.

4. A multifunctional detection device based on magnetic field detection according to claim 2, characterized in that: The joint assembly (5) comprises: An upper plug mounting seat (8) having an external thread at its head end and an external thread and an internal thread at its tail end, wherein the external thread at the tail end of the upper plug mounting seat (8) is used to connect with the head end of the sleeve (1), and the internal thread at the tail end is used to connect with the upper nylon member (6); An upper plug (9) is inserted into the head end of the upper plug mounting seat (8) and is provided with a convex ring for abutting against the head end port of the upper plug mounting seat (8); The upper plug gland (10) has an internal thread at one end for mating with the external thread at the first end of the upper plug mounting seat (8), and a narrow opening at the other end for abutting against the convex ring.

5. The multifunctional detection device based on magnetic field detection according to claim 1, characterized in that: The tail end of the sleeve (1) is detachably connected to a sleeve head (11) for closing the sleeve (1) and radially limiting the second magnetic gradient element (3).

6. A multifunctional detection device based on magnetic field detection according to claim 1, characterized in that: The gyroscope is a nine-axis gyroscope, which collects nine-axis data in real time, including three-axis magnetic field strength, three-axis acceleration, and three-axis angular velocity.

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