Micro-vibration detection device and detection method based on Lenz's law

Abstract

The present invention discloses a micro-vibration detection device and detection method based on Lenz's law, comprising a wire tube, comprising a left wire tube and a right wire tube connected to the left wire tube, the left wire tube is wound with a left coil, the left coil is connected with a left indicator, the right wire tube is wound with a right coil, the right coil is connected with a right indicator; a permanent magnet is placed in the wire tube and contacts the wire tube through a magnetic liquid, comprising a left permanent magnet, an intermediate permanent magnet connected to the left permanent magnet through a left connector, and a right permanent magnet connected to the intermediate permanent magnet through a right connector; a shell, comprising an upper shell and a lower shell corresponding to the upper shell, wherein a groove and / or a protrusion for placing the wire tube is arranged inside the shell. The present invention uses Lenz's law to detect micro-vibration by whether the left coil and the right coil generate current, and has high detection accuracy, simple structure, and convenient use and maintenance.

Description

Technical Field

[0001] The present invention relates to the technical field of micro-vibration detection, and in particular to a micro-vibration detection device and a detection method based on Lenz's law. Background Art

[0002] Magnetic liquid, also known as magnetic fluid, is a special intelligent material with controllable rheological properties with an external magnetic field. It is widely used in environmental protection, machinery, medical, chemical, electronic, printing and other industries. The magnetism of magnetic fluid mainly depends on the magnetic particles, and the magnetization vector of the magnetic particles is constantly changing. When there is no external magnetic field, the magnetization vectors of the magnetic particles cancel each other out, the sum of the system magnetic moments becomes zero, and the magnetic fluid has no magnetic force; when an external magnetic field acts, due to the action of the magnetic field force, the magnetization vectors of the magnetic particles quickly orient themselves along the direction of the external magnetic field, thereby showing magnetism. This is the magnetic response characteristic of the magnetic fluid.

[0003] Lenz's law is the concrete manifestation of the law of conservation of energy in the phenomenon of electromagnetic induction. Its content can be summarized as follows: the induced current has such a direction that the magnetic field of the induced current always hinders the change of the magnetic flux that causes the induced current.

[0004] With the development of science and technology, the modern machining industry has entered the era of precision and ultra-precision. Due to the influence of environmental vibration, in precision optical instruments such as electron microscopes, the micro-vibration of the equipment may cause errors in the test results, so the influence of ambient vibration interference has become a key factor in measurement and control accuracy.

[0005] Nowadays, high-precision vibration isolation platforms are required to isolate not only macro vibrations caused by machine operation, vehicle driving, and personnel movement, but also micro vibrations caused by factors such as the rotation of the earth and air conditioning airflow. However, existing detection devices often cannot fully meet the detection needs of micro vibrations, and the structure is relatively complex and the cost of the device is high.

[0006] The information disclosed in this background technology section is only intended to deepen the understanding of the overall background technology of the present invention, and should not be regarded as acknowledging or suggesting in any form that the information constitutes the prior art known to those skilled in the art. Summary of the invention

[0007] The purpose of the present invention is to provide a micro-vibration detection device and detection method based on Lenz's law, so as to solve the technical problems of low detection accuracy, complex structure and high cost of existing detection devices and detection methods.

[0008] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0009] Design a micro-vibration detection device based on Lenz's law, which mainly includes:

[0010] The wire tube comprises a left wire tube and a right wire tube connected to the left wire tube, the left wire tube is wound with a left coil, the left coil is connected with a left indicator, the right wire tube is wound with a right coil, the right coil is connected with a right indicator;

[0011] A permanent magnet is placed in the wire tube and contacts the wire tube through a magnetic liquid, and includes a left permanent magnet, a middle permanent magnet connected to the left permanent magnet through a left connector, and a right permanent magnet connected to the middle permanent magnet through a right connector;

[0012] The shell comprises an upper shell and a lower shell corresponding to the upper shell, and a groove and / or a protrusion for placing the wire tube is arranged inside the lower shell.

[0013] Preferably, a left baffle hole for placing a left baffle is opened on the left end surface of the left coil of the left wire tube, and a right baffle hole for placing a right baffle is opened on the right end surface of the right coil of the right wire tube.

[0014] Preferably, the left baffle plate and the right baffle plate pass through the upper shell body / lower shell body and are placed in the left wire tube and the right wire tube through the left baffle plate hole and the right baffle plate hole.

[0015] Preferably, the left end face of the left permanent magnet corresponds to the left end face of the left coil, the right end face of the right permanent magnet corresponds to the right end face of the right coil, the left and right end faces of the middle permanent magnet correspond to the right and left end faces of the left and right coils respectively; and the permanent magnets are supported by the left baffle and the right baffle.

[0016] Preferably, the left coil and the right coil are symmetrically distributed, and correspondingly, the left permanent magnet and the right permanent magnet have the same structural size and are symmetrically distributed about the middle permanent magnet.

[0017] Preferably, the left permanent magnet, the middle permanent magnet and the right permanent magnet are all disc-shaped.

[0018] Preferably, the wire tube is made of a transparent material that does not adhere to the magnetic liquid.

[0019] Preferably, the left and right electrical indicators are both LED lamps.

[0020] Preferably, the shell is made of a transparent magnetic-isolating material, and a plurality of fixed foot plates are provided at the bottom of the lower shell.

[0021] A micro-vibration detection method using the micro-vibration detection device based on Lenz's law is designed, which mainly includes the following steps:

[0022] (1) Installing the detection device on the object to be detected;

[0023] (2) Take out the left baffle and the right baffle for supporting the permanent magnet;

[0024] (3) Whether the object to be measured is vibrating is determined based on whether the indicator is powered on, and the degree of vibration is determined based on the degree of brightness of the LED light.

[0025] Compared with the prior art, the beneficial technical effects of the present invention are:

[0026] 1. The present invention uses the magnetic response characteristics of magnetic liquid and the characteristic of permanent magnet adsorbing magnetic liquid to perform micro-vibration detection, uses Lenz's law to realize the restoring force requirement of the inertial mass body, and determines whether micro-vibration occurs by whether the indicator is energized.

[0027] 2. The device of the present invention has a simple structure and is easy to use and maintain. The magnetic liquid is a new type of lubricant, which greatly reduces the friction between the permanent magnet and the inner wall of the wire tube, thereby further improving the detection accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 The figure is a schematic structural diagram of an embodiment of the present invention.

[0029] In the figure, 1 is a wire tube, 2 is a left connecting piece, 3 is a left coil, 4 is a right coil, 5 is a right connecting piece, 6 is a magnetic liquid, 7 is an upper shell, 8 is a right LED lamp, 9 is a lower shell, 10 is a right permanent magnet, 11 is a middle permanent magnet, 12 is a left permanent magnet, 13 is a left LED lamp, 14 is a left baffle, and 15 is a right baffle. DETAILED DESCRIPTION

[0030] The specific implementation modes of the present invention are described below in conjunction with the accompanying drawings and examples. However, the following examples are only used to illustrate the present invention in detail and do not limit the scope of the present invention in any way.

[0031] In the description of the technical solution of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. The terms "first", "second", etc., as used in this application, are used to distinguish similar objects, rather than to limit a specific order or sequence.

[0032] The unit modules involved in the following embodiments are conventional commercially available products unless otherwise specified.

[0033] Embodiment 1: A micro-vibration detection device based on Lenz's law, see Figure 1 , mainly including:

[0034] A solenoid 1 comprises a left wire tube and a right wire tube connected to the left wire tube, wherein a left coil 3 is wound around the left wire tube, and the left coil 3 is connected to a left indicator, which is a left LED lamp 13; a right coil 4 is wound around the right wire tube, and the right coil is connected to a right indicator, which is a right LED lamp 8; a left baffle hole for placing a left baffle 14 is provided on the left end surface of the left coil 1 of the left wire tube, and a right baffle hole for placing a right baffle 15 is provided on the right end surface of the right coil 4 of the right wire tube, and the left baffle 14 passes through the upper shell 7 and is placed in the left wire tube through the left baffle hole, and the right baffle 15 passes through the upper shell 7 and is placed in the right wire tube through the right baffle hole; the wire tube 1 is made of transparent material to facilitate observation of the internal situation thereof, and the wire tube 1 cannot adhere to magnetic liquid to avoid affecting the detection accuracy.

[0035] A permanent magnet is placed in the wire tube 1 and contacts the wire tube 1 through a magnetic liquid 6. The permanent magnet uses its own magnetic field to uniformly adsorb the magnetic liquid 6 so that it is suspended in the wire tube 1. The magnetic liquid 6 is equivalent to a lubricant, and the friction between the magnetic liquid 6 and the wire tube 1 is extremely small, thereby improving the detection accuracy; the permanent magnet includes a left permanent magnet 12, an intermediate permanent magnet 11 connected to the left permanent magnet 12 through a left connecting piece 2, and a right permanent magnet 10 connected to the intermediate permanent magnet 11 through a right connecting piece 5; the left end face of the left permanent magnet 12 corresponds to the left end face of the left coil 3, the right end face of the right permanent magnet 10 corresponds to the right end face of the right coil 4, and the left and right end faces of the intermediate permanent magnet 11 are respectively The left and right coils 3 and 4 correspond to the right and left end surfaces thereof, respectively, and the permanent magnet is supported by the left baffle 14 and the right baffle 15. Such a design enables the permanent magnet to change the magnetic flux inside the solenoid 1 due to Lenz's law once it moves, thereby generating an induced current in the left and right coils 3 and 4, and the left and right LED lights 13 and 8 will emit light, thereby detecting micro-vibration. The left coil 3 and the right coil 4 are symmetrically distributed, and correspondingly, the left permanent magnet 12 and the right permanent magnet 10 have the same structural dimensions, and are symmetrically distributed about the middle permanent magnet 11. The left permanent magnet 12, the middle permanent magnet 11 and the right permanent magnet 10 are all disc-shaped, which is beneficial for the permanent magnet to adsorb the magnetic liquid 6.

[0036] The shell includes an upper shell 7 and a lower shell 9 corresponding to the upper shell 7, and is provided with grooves and protrusions for placing the wire tube 1; the bottom of the lower shell 9 is provided with two fixed feet for installing the device on the object to be tested.

[0037] A micro-vibration detection method using the micro-vibration detection device based on Lenz's law comprises the following steps:

[0038] (1) The bottom of the housing of the detection device is provided with a foot for installation, and the detection device can be installed on the object to be detected by bolts, and the detection device is ensured to be kept as horizontal as possible to prevent the detection result from being further affected by other external forces such as gravity.

[0039] (2) After the installation is completed, the left baffle and the right baffle used to support the permanent magnet can be taken out. In this way, when there is vibration, the permanent magnet will move, causing the magnetic flux inside the wire tube to change, thereby causing the left and right coils to generate induced current.

[0040] (3) Judging whether the object to be detected is vibrating is determined based on whether the LED light is on or off, and judging the degree of vibration based on the degree of brightness of the LED light. When vibration occurs, the left and right coils generate induced currents, causing the LED light to light up. After the vibration stops, the change in the magnetic flux of the coils causes the coils to generate a restoring force on the permanent magnet, causing the permanent magnet to return to its original position. When no vibration occurs, the LED light will not light up. When the object to be detected moves unilaterally, the permanent magnet will still move due to inertia, causing the LED light to light up. The moving direction of the object to be detected can be determined based on the brightness of the left and right LED lights. When the object to be detected moves to the left, due to inertia, the permanent magnet also moves to the left, and the left LED light is on. Otherwise, the right LED light is on.

[0041] The present invention has been described in detail above with reference to the accompanying drawings and embodiments. However, those skilled in the art will appreciate that, without departing from the concept of the present invention, the specific parameters in the above embodiments may be changed, or related components, structures and materials may be replaced by equivalents, thereby forming multiple specific embodiments, which are all within the common variation range of the present invention and will not be described in detail one by one here.

Claims

1. A micro-vibration detection device based on Lenz's law, characterized in that: include: A wire tube, comprising a left wire tube and a right wire tube connected to the left wire tube, wherein a left coil is wound on the left wire tube, and the left coil is connected to a left indicator, and a right coil is wound on the right wire tube, and the right coil is connected to a right indicator; a left baffle hole for placing a left baffle is opened at the left end surface of the left coil, and a right baffle hole for placing a right baffle is opened at the right end surface of the right coil; the left baffle and the right baffle pass through the upper shell / lower shell and are placed in the left wire tube and the right wire tube through the left baffle hole and the right baffle hole; A permanent magnet is placed in the wire tube and contacts the wire tube through a magnetic liquid, comprising a left permanent magnet, an intermediate permanent magnet connected to the left permanent magnet through a left connector, and a right permanent magnet connected to the intermediate permanent magnet through a right connector; the left end face of the left permanent magnet corresponds to the left end face of the left coil, the right end face of the right permanent magnet corresponds to the right end face of the right coil, the left and right end faces of the intermediate permanent magnet correspond to the right and left end faces of the left and right coils respectively; and the permanent magnet is supported by the left baffle and the right baffle; The shell comprises an upper shell and a lower shell correspondingly connected to the upper shell, and a groove and / or a protrusion for placing the wire tube is arranged inside the lower shell.

2. The micro-vibration detection device based on Lenz's law according to claim 1, characterized in that: The left coil and the right coil are symmetrically distributed. Correspondingly, the left permanent magnet and the right permanent magnet have the same structural size and are symmetrically distributed about the middle permanent magnet.

3. The micro-vibration detection device based on Lenz's law according to claim 1, characterized in that: The left permanent magnet, the middle permanent magnet and the right permanent magnet are all in the shape of discs.

4. The micro-vibration detection device based on Lenz's law according to claim 1, characterized in that: The wire tube is made of a transparent material that does not adhere to the magnetic liquid.

5. The micro-vibration detection device based on Lenz's law according to claim 1, characterized in that: The left and right indicator lamps are both LED lamps.

6. The micro-vibration detection device based on Lenz's law according to claim 1, characterized in that: The shell is made of transparent magnetic-isolating material, and a plurality of fixing foot plates are arranged at the bottom of the lower shell.

7. A micro-vibration detection method using the micro-vibration detection device based on Lenz's law as claimed in claim 1, mainly comprising the following steps: (1) Installing the detection device on the object to be detected; (2) removing the left baffle and the right baffle used to support the permanent magnet; (3) Determine whether the object to be measured is vibrating based on whether the indicator is energized.

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