Electromagnetic induction vibration monitoring sensor
By using a simplified and low-cost electromagnetic induction vibration monitoring sensor, the problems of complexity and high cost of existing electromagnetic induction sensors are solved, achieving high-sensitivity vibration monitoring and frequency analysis, and making it suitable for a variety of detection scenarios.
Patent Information
- Application Number
- CN202520292482.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-24
- Publication Date
- 2025-12-30
- Estimated Expiration
- 2035-02-24
AI Technical Summary
Existing electromagnetic induction vibration sensors are complex in structure, expensive, and difficult to modify and integrate, which limits their application range, especially their insufficient sensitivity in a specific frequency range.
An electromagnetic induction vibration monitoring sensor was designed, comprising a top plate, a bottom plate, a spring, a magnetic field generating device, a conductor, and an insulating pad. It generates an induced electromotive force by the conductor cutting magnetic field lines. The sensor has a simple structure, low cost, and is easy to integrate.
It achieves higher sensitivity vibration monitoring, can capture minute vibration changes, and provide frequency characteristic analysis. It is suitable for scenarios such as mechanical vibration monitoring, structural health monitoring, impact testing, and quality inspection.
Smart Images
Figure CN223741741U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a kind of electromagnetic induction vibration monitoring sensors, belong to sensor technical field. BACKGROUND
[0002] The existing vibration sensing solution is mostly dependent on piezoelectric material, capacitance effect or inertial accelerometer principle work.However, the insufficient sensitivity in certain specific frequency range limits their application range.The existing vibration sensor based on electromagnetic induction principle is more sensitive compared with other vibration sensors, and is suitable for vibration measurement in wide frequency range, but the existing electromagnetic induction type vibration sensor is mostly complex structure, and the production cost is higher, and due to the limitation of structure shape makes it not convenient to retrofit integration, seriously affect its application range.Therefore, a new type of electromagnetic induction vibration monitoring sensor is needed to make it suitable for more detection or measurement scene. SUMMARY
[0003] The utility model discloses in order to solve the above-mentioned technical problem, and then provides a kind of electromagnetic induction vibration monitoring sensor.
[0004] The utility model discloses the technical scheme who is used to solve above-mentioned technical problem is as follows:
[0005] A kind of electromagnetic induction vibration monitoring sensor, including top plate, bottom plate and the sensor main body being installed between top plate and bottom plate, wherein, top plate and bottom plate are connected by multiple springs, the sensor main body includes magnetic field generating device, conductor and insulating gasket, magnetic field generating device is fixed on the top surface of bottom plate, conductor is vertically arranged and is fixed on the bottom surface of top plate by insulating gasket, when top plate and bottom plate occur relative displacement, conductor cuts the magnetic induction line generated by magnetic field generating device.
[0006] Further, the top end of magnetic field generating device is installed with support frame, the conductor is vertically worn on support frame, and the conductor and support frame are connected by guiding bearing and slide up and down.
[0007] Further, the conductor and insulating gasket are connected by insulating rod, the upper end of conductor is inserted in the lower part of insulating rod, and the conductor is connected by insulating rod and guiding bearing.
[0008] Further, the bottom surface of top plate is fixed with multiple upper guide columns, the top surface of bottom plate is fixed with multiple lower guide columns, multiple upper guide columns, multiple lower guide columns and multiple springs are same in number and one-to-one correspondence arrangement, and the upper and lower ends of each spring are respectively corresponded and sleeved on upper guide column and lower guide column.
[0009] Further, the lower guide column is cylindrical structure, and its inner diameter is greater than the outer diameter of upper guide column.
[0010] Further, the conductor is a rod structure.
[0011] Further, the insulating pad is made of rubber.
[0012] Further, the insulating rod is made of plastic or resin fiber material.
[0013] Further, the top plate and the bottom plate are made of light alloy material, and the spring is made of memory alloy wire.
[0014] Further, the magnetic field generating device is externally covered with a protective cover.
[0015] The utility model has the following effects compared with prior art:
[0016] The electromagnetic induction vibration monitoring sensor of the utility model compared with prior art vibration sensor based on electromagnetic induction principle, structure is simpler, operation is also simpler, manufacturing cost is lower, is more convenient for refitting integration.
[0017] The electromagnetic induction vibration monitoring sensor of the utility model not only can capture tiny vibration change, but also can provide frequency characteristic analysis, is helpful to predictive maintenance and fault diagnosis.Suitable for mechanical vibration monitoring, structure health monitoring, impact detection quality detection etc. BRIEF DESCRIPTION OF DRAWINGS
[0018] Fig. 1 It is the three-dimensional structure schematic diagram of the utility model;
[0019] Fig. 2 It is the front view schematic diagram of the utility model;
[0020] Fig. 3 It is the principle schematic diagram of the utility model.
[0021] In the drawing:
[0022] 1, top plate;2, bottom plate;3, spring;4, magnetic field generating device;5, conductor;6, insulating pad;7, support frame;8, guide bearing;9, insulating rod;10, upper guide column;11, lower guide column;12, output lead;13, protective cover. DETAILED DESCRIPTION
[0023] Specific implementation mode one: combine Figs. 1-3 It is obvious that the described implementation mode is only a part of implementation mode of the utility model, and is not all implementation mode, based on the implementation mode in the utility model, all other implementation mode obtained by the ordinary skill in the art without making creative labor belongs to the scope of protection of the utility model.
[0024] It should be noted that the description of the present application about "front", "back", "left", "right", "inner", "outer", "left side", "right side", "upper part", "lower part", "top", "bottom" and the like are defined based on the position or relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and are not intended to indicate or imply that the structure must be constructed and operated in a particular orientation, therefore, it cannot be understood as a limitation on the present application. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise specifically defined.
[0025] In the description of the present application, unless otherwise specifically defined and limited, the terms "mounting", "connecting", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be directly connected, or indirectly connected through an intermediate medium, or the communication between the two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.
[0026] An electromagnetic induction vibration monitoring sensor, comprising a top plate 1, a bottom plate 2 and a sensor body mounted between the top plate 1 and the bottom plate 2, wherein the top plate 1 and the bottom plate 2 are connected by a plurality of springs 3, the sensor body comprises a magnetic field generating device 4, a conductor 5 and an insulating gasket 6, the magnetic field generating device 4 is fixed on the top surface of the bottom plate 2, the conductor 5 is vertically arranged and fixed on the bottom surface of the top plate 1 through the insulating gasket 6, when the top plate 1 and the bottom plate 2 have relative displacement, the conductor 5 cuts the magnetic induction lines generated by the magnetic field generating device 4.
[0027] The magnetic field is provided by the magnetic field generating device 4, and the specific structure of the magnetic field generating device 4 is the prior art, which will not be described here.
[0028] The magnetic field generating device 4 can be a permanent magnet or the like structure, which is fixed in a stable frame to ensure strong and uniform magnetic field distribution, thereby optimizing the induction efficiency.
[0029] The conductor 5 is made of high-efficiency magnetic material, which enhances the induced electromotive force generated when cutting the magnetic induction lines.
[0030] The two ends of the conductor 5 are connected to an external power supply through output wires 12.
[0031] The top plate 1 and the bottom plate 2 serve to fix and support the sensor body, and the top plate 1 and / or the bottom plate 2 move with vibration, and when subjected to vibration, the top plate 1 and the bottom plate 2 form relative displacement.
[0032] The insulating gasket 6 is located between the top plate 1 and the conductor 5, which ensures that there is no electrical connection between the top plate 1 and the conductor 5, and also has a certain buffering effect to prevent direct collision between components under extreme conditions.
[0033] When the top plate 1 or the bottom plate 2 is subjected to external vibration, a relative displacement occurs between them. During this displacement, the conductor 5 cuts the magnetic field lines generated by the magnetic field generating device 4, moving within the magnetic field. According to Faraday's law of electromagnetic induction, an induced electromotive force is generated in the conductor 5. Since the amplitude and frequency of the vibration are directly related to the speed at which the conductor 5 cuts the magnetic field lines, the waveform of the generated alternating current corresponds precisely to the vibration pattern. This method of directly converting vibration into an electrical signal offers fast response and a wide measurement range.
[0034] Spring 3, as the main vibration receiving component of the vibration sensor, can have its stiffness and length designed to adapt to vibrations of different frequencies. One end of spring 3 is connected to the top plate 1, and the other end is connected to the bottom plate 2.
[0035] Compared with existing vibration sensors based on the principle of electromagnetic induction, the electromagnetic induction vibration monitoring sensor of this invention has a simpler structure, is easier to operate, has lower manufacturing costs, and is easier to modify and integrate.
[0036] This invention's electromagnetic induction vibration monitoring sensor can not only capture minute vibration changes but also provide frequency characteristic analysis, aiding in predictive maintenance and fault diagnosis. It is suitable for scenarios such as mechanical vibration monitoring, structural health monitoring, and impact testing quality inspection. For example:
[0037] When used for mechanical vibration monitoring: the top plate 1 or the bottom plate 2 is attached to the vibration source, and the vibration is judged according to the generated electrical signal waveform. Through precise installation, the sensor is closely attached to the surface of the object being measured, and its dynamic behavior is monitored in real time, providing a basis for equipment condition assessment.
[0038] When used for structural health monitoring: the structural component to be monitored is placed on the top plate 1 and vibration is applied to it. The fundamental frequency and cracks are determined based on the generated electrical signal vibration and noise. Modal analysis is performed on the data collected after the structure is periodically excited by the sensor to identify the potential damage location and its severity.
[0039] When used for impact testing: the structural component to be tested is placed on the top plate 1, an impact load is applied to it, its impact resistance is judged based on the trend of electrical signal change, it responds quickly to transient events, and records the maximum acceleration value and other characteristic parameters during the impact process to help evaluate the safety and durability of the structure.
[0040] When used for vibration isolation testing: the structural component to be tested is placed on top plate 1, and vibration is applied to it. The vibration isolation performance is judged based on the ratio of the frequency and amplitude of the electrical signal to the vibration. By comparing the input and output vibration levels, the vibration isolation effect of the system is quantified, guiding the design of vibration reduction schemes.
[0041] When used in scenarios such as quality measurement: the item to be measured is placed directly on the top plate 1, and its mass is measured based on the electrical signal. Based on the principle of resonant frequency variation, contact-based quality measurement is achieved, suitable for quality control of objects.
[0042] A support frame 7 is installed at the top of the magnetic field generating device 4. The conductor 5 is vertically mounted on the support frame 7, and the conductor 5 and the support frame 7 are slidably connected vertically via a guide bearing 8. This design, by setting up the support frame 7, facilitates the installation of the guide bearing 8. The support frame 7 can be a "U"-shaped structure. The guide bearing 8 is fixedly mounted on the top crossbeam of the support frame 7, reducing its own weight while increasing the vertical movement range of the conductor 5. By setting up the guide bearing 8, unnecessary lateral swaying of the conductor 5 is effectively reduced, thereby ensuring the vertical movement of the conductor 5. Simultaneously, together with the insulating gasket 6, it serves to limit the movement of the conductor 5.
[0043] Conductor 5 and insulating pad 6 are connected by insulating rod 9. The upper end of conductor 5 is inserted into the lower part of insulating rod 9, and conductor 5 is connected to guide bearing 8 through insulating rod 9. This design further improves insulation performance through insulating rod 9, ensuring that there is no electrical connection between conductor 5 and top plate 1.
[0044] Multiple upper guide posts 10 are fixedly mounted on the bottom surface of the top plate 1, and multiple lower guide posts 11 are fixedly mounted on the top surface of the bottom plate 2. The number of upper guide posts 10, lower guide posts 11, and springs 3 are identical and arranged in a one-to-one correspondence. The upper and lower ends of each spring 3 are respectively fitted onto the upper guide post 10 and the lower guide post 11. This design, by setting the upper guide posts 10 and the lower guide posts 11, serves to guide the springs 3 and limit the movement of the top plate 1 and the bottom plate 2. The upper guide posts 10 and the lower guide posts 11 are made of low-friction coefficient materials, such as ceramics or high-performance engineering plastics, to minimize motion resistance and ensure vertical linear movement.
[0045] The lower guide post 11 has a cylindrical structure, and its inner diameter is larger than the outer diameter of the upper guide post 10. This design facilitates the overall storage and transportation of the vibration sensor. The inner hole of the lower guide post 11 can be a straight hole, a stepped hole, or a blind hole, as long as the lower end of the upper guide post 10 can be inserted into the upper part of the lower guide post 11.
[0046] The conductor 5 has a rod-shaped structure.
[0047] The insulating pad 6 is made of rubber. This design, using a highly elastic rubber insulating pad 6, serves to limit and prevent collisions to the conductor 5.
[0048] The insulating rod 9 is made of plastic or resin fiber. This design, using plastic or resin fiber materials with high rigidity, further reduces unnecessary lateral swaying of the conductor 5 during the cutting of magnetic field lines, thereby further ensuring the vertical movement of the conductor 5.
[0049] The top plate 1 and bottom plate 2 are made of lightweight alloy material, and the spring 3 is made of shape memory alloy wire. This design ensures sufficient structural strength while reducing weight. The shape memory alloy wire has a temperature compensation function, which can maintain a constant elastic coefficient under large temperature differences, ensuring the consistency and reliability of the output signal.
[0050] The magnetic field generating device 4 is equipped with a protective cover 13. This design allows the protective cover 13 to shield the magnetic field, effectively resisting interference from the external environment and providing good environmental adaptability.
[0051] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.
Claims
1. An electromagnetic induction vibration monitoring sensor, characterized by: The sensor comprises a top plate (1), a bottom plate (2) and a sensor body installed between the top plate (1) and the bottom plate (2), wherein the top plate (1) and the bottom plate (2) are connected by a plurality of springs (3), the sensor body comprises a magnetic field generating device (4), a conductor (5) and an insulating pad (6), the magnetic field generating device (4) is fixed on the top surface of the bottom plate (2), the conductor (5) is vertically arranged and fixed on the bottom surface of the top plate (1) through the insulating pad (6), and when the top plate (1) and the bottom plate (2) are relatively displaced, the conductor (5) cuts the magnetic induction lines generated by the magnetic field generating device (4).
2. An electromagnetic induction vibration monitoring sensor according to claim 1, characterised in that: A top end of the magnetic field generating device (4) is provided with a support frame (7), the conductor (5) is vertically arranged on the support frame (7), and the conductor (5) and the support frame (7) are connected through a guide bearing (8) in an up-down sliding mode.
3. An electromagnetic induction vibrational monitoring sensor according to claim 2, wherein: The conductor (5) and the insulating pad (6) are connected through an insulating rod (9), the upper end of the conductor (5) is inserted into the lower part of the insulating rod (9), and the conductor (5) is connected with the guide bearing (8) through the insulating rod (9).
4. The electromagnetic induction vibrational monitoring sensor of claim 1, wherein: The bottom surface of the top plate (1) is fixed with a plurality of upper guide columns (10), the top surface of the bottom plate (2) is fixed with a plurality of lower guide columns (11), the plurality of upper guide columns (10), the plurality of lower guide columns (11) and the plurality of springs (3) are arranged in a one-to-one correspondence and have the same number, and the upper and lower ends of each spring (3) are respectively sleeved on the upper guide column (10) and the lower guide column (11).
5. An electromagnetic induction vibration monitoring sensor according to claim 4, characterised in that: The lower guide column (11) is a cylindrical structure, and the inner diameter of the lower guide column (11) is greater than the outer diameter of the upper guide column (10).
6. The electromagnetic induction vibration monitoring sensor of claim 1, wherein: The conductor (5) is a rod-shaped structure.
7. The electromagnetic induction vibration monitoring sensor of claim 1, wherein: The insulating pad (6) is made of rubber.
8. The electromagnetic induction vibration monitoring sensor of claim 3, wherein: The insulating rod (9) is made of plastic or resin fiber material.
9. The electromagnetic induction vibration monitoring sensor of claim 1, wherein: The top plate (1) and the bottom plate (2) are made of light alloy material, and the spring (3) is made of memory alloy wire.
10. The electromagnetic induction vibration monitoring sensor of claim 1, wherein: The magnetic field generating device (4) is externally provided with a protective cover (13).