Non-contact motion body state detection device

Abstract

The present invention provides a non-contact moving body state detection device for detecting the state of the moving body, comprising a supporting shell, an inductive component and a magnetic field component, wherein the supporting shell is configured to have an internal accommodation space for matching and accommodating the inductive component and the magnetic field component, so that when the magnetic field of the magnetic field component changes, the inductive component generates an electrical signal matching the magnetic field change, the moving body and / or an intermediate structure installed on the moving body forms a closed magnetic circuit with the magnetic field component, and the magnetic field change is caused by the state. The present invention can measure various states of the moving body, has high measurement accuracy, good versatility, convenient detection, and more sensitive detection.

Description

Technical Field

[0001] The present invention relates to the field of detection technology, and in particular to a non-contact moving body state detection device. Background Art

[0002] There are a large number of rotating machines in operation in industrial production. They run at high speeds and are key equipment in factories. Their operating conditions not only affect the operation of the machinery and equipment themselves, but also cause losses to subsequent production. In serious cases, they may even lead to accidents in which the machine is destroyed and people are killed. When these rotating units are in operation, the rotors will produce axial displacement and radial vibration due to their own characteristics. After the rotor is repaired or before the rotor leaves the factory, as well as in other scenarios, the rotor, especially the drive shaft, needs to be inspected. In this process, the measurement of shaft displacement and vibration is very important.

[0003] However, most of the existing detection devices have problems such as low measurement accuracy, inconvenient operation, and difficulty in carrying. In addition, the measurement is limited to displacement and vibration, and it is difficult to measure cracks and surface flatness in the tested parts.

[0004] Patent document CN05043230B discloses a device for measuring the displacement of an aircraft vortex cooling shaft and a method for measuring the displacement of a vortex cooling shaft. The device is to fasten a Y-shaped bracket on a ferrule seat by means of hexagon socket screws, fix a slider card on the Y-shaped bracket, fix a sensor support rod vertically under the slider card, and fix a current displacement sensor on the sensor support rod; when measuring the displacement of the vortex cooling shaft, based on the outer circle of the volute, the vortex cooling shaft displacement measuring device is directly inserted into the inner circle of the volute to be measured, the center circle hole of the Y-shaped bracket is sleeved on the outer circumference of the vortex cooling shaft of the measured workpiece, and the distance between the head of the current displacement sensor probe and the outer circle of the vortex cooling shaft of the measured workpiece is adjusted; the current displacement sensor measures the relative position between the outer circle of the measured vortex cooling shaft and the end face of the current displacement sensor to complete the test of the shaft displacement, but the design needs to contact the measured component, and often cannot be detected in some restricted detection environments, with poor versatility and inconvenient detection. Summary of the invention

[0005] In view of the defects in the prior art, an object of the present invention is to provide a non-contact moving body state detection device.

[0006] A non-contact moving body state detection device provided by the present invention is used to detect the state of a moving body, and includes a supporting shell, an inductive component and a magnetic field component;

[0007] The supporting shell is configured to have an accommodation space inside for accommodating the inductive component and the magnetic field component so that when the magnetic field of the magnetic field component changes, the inductive component generates an electrical signal matching the change of the magnetic field;

[0008] The moving body and / or the intermediate structure installed on the moving body form a closed magnetic circuit with the magnetic field component, and the magnetic field change is caused by the state.

[0009] Preferably, the state includes any one or more of the following states: displacement of the moving body, speed, acceleration, thickness, rotation speed, rotation angle, number of rotations, rotation frequency, gap, surface flatness, surface roughness, and surface cracks.

[0010] Preferably, the magnetic field component comprises a magnetostrictor and a first coil, wherein the first coil is arranged along the circumference of the magnetostrictor and is used to generate an electromagnetic field when powered on;

[0011] The inductive component adopts any of the following structures:

[0012] The inductive component comprises a piezoelectric material body, the magnetostrictive body and the piezoelectric material body are sequentially arranged in series or in parallel in the accommodation space, and the piezoelectric material body is used to generate a first induced electrical signal;

[0013] The inductive component includes a third coil, which is arranged along the circumference of the magnetostrictive body and is used to generate a first induced electrical signal.

[0014] Preferably, it also includes two functional arms, one end of each of the functional arms is installed in the accommodating space and can transmit the deformation or deformation trend of the magnetostrictive body to the piezoelectric material body in the form of force when the magnetic field of the magnetostrictive body changes, and the other end of each of the functional arms extends to the outside of the accommodating space and is arranged in a gap with the moving body.

[0015] Preferably, a first functional moving body is disposed outside the supporting shell, the first functional moving body is an intermediate structure, and the first functional moving body includes a detection state and a non-detection state;

[0016] The first functional moving body can be mounted on the moving body and move simultaneously with the moving body in the detection state, and the first functional moving body can be matched and mounted on the supporting shell in the non-detection state, wherein:

[0017] The moving body is made of non-metallic material, and the first functional moving body is made of magnetic material.

[0018] Preferably, a second functional moving body is fixed along the circumference of the moving body, the second functional moving body is an intermediate structure, and both the moving body and the second functional moving body are made of magnetic materials.

[0019] Preferably, it further comprises a third functional component and two functional arms, wherein the third functional component comprises a housing, one end of each of the two functional arms is installed in the housing space and directly or indirectly connected to the magnetostrictive body, and the other end of each of the two functional arms extends to the outside of the housing space and is connected to the housing;

[0020] The housing is provided with an opening, the moving body is matched and mounted on the opening, and a closed space is formed between the moving body and the housing. The moving body can slide relative to the housing under the action of an external force or can undergo elastic deformation and thus can move closer to or away from the functional arm, and the inside of the closed space is in a vacuum state or filled with air, and the inside of the closed space also has any of the following structural arrangements:

[0021] comprising a second permanent magnet, wherein the second permanent magnet is mounted on the moving body;

[0022] The invention comprises a second permanent magnet and a third permanent magnet, wherein the second permanent magnet is mounted on the moving body, the third permanent magnet is mounted on the accommodating shell, and the second permanent magnet and the third permanent magnet are arranged to attract or repel each other magnetically, wherein an elastic body is arranged between the second permanent magnet and the third permanent magnet, or no elastic body is arranged;

[0023] Wherein, the second permanent magnet is an intermediate structure.

[0024] Preferably, the moving body is also connected to a flying structure and the flying structure can rise or fall by relying on its own structure or structural changes when in a fluid environment flowing at a set flow rate, thereby driving the moving body to move closer and farther away from the containing shell, and the magnetic field changes due to the approaching and moving away movements.

[0025] Preferably, the magnetic field component further comprises a second coil, which is arranged along the circumference of the magnetostrictive body and is used to generate a second induced electrical signal when the magnetic field of the magnetostrictive body changes.

[0026] Preferably, the magnetic field component comprises a magnet and the magnet can be arranged at any position of the closed magnetic circuit to be sensitive to the magnetic field of the closed magnetic circuit.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] 1. The present invention can measure various states of a moving body, has high measurement accuracy, is convenient for detection, has good versatility, and is more sensitive for detection.

[0029] 2. The present invention can detect various states of moving bodies made of magnetic metal materials, non-magnetic metal materials and non-metallic materials, and has a wide range of applications.

[0030] 3. The present invention has a variety of implementable structures for different application scenarios, can be flexibly selected according to different application scenarios, and has good versatility. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Other features, objects and advantages of the present invention will become more apparent from the detailed description of non-limiting embodiments made with reference to the following drawings:

[0032] Figure 1 It is a structural schematic diagram when the inductive component and the magnetic field component are connected in series, wherein the inductive component is made of piezoelectric material;

[0033] Figure 2 It is a structural schematic diagram when the inductive component and the magnetic field component are connected in series, wherein the inductive component is made of a piezoelectric material body, and a second coil for induction is also provided on the magnetic field component;

[0034] Figure 3 For Figure 2 A schematic structural diagram of a magnetic field component when a first permanent magnet is arranged circumferentially on the basis of the magnetic field component;

[0035] Figure 4 It is a schematic diagram of the structure when the inductive component adopts the third coil, wherein a first permanent magnet is arranged in the circumference of the magnetostrictive body;

[0036] Figure 5 It is a schematic diagram of the structure when the induction coil and the excitation coil of the magnetostrictive body are the same coil;

[0037] Figure 6 It is a structural schematic diagram when the inductive component and the magnetic field component are connected in parallel, wherein both ends of the inductive component and the magnetic field component are connected to the ends of the two functional arms;

[0038] Figure 7 It is a structural schematic diagram when the inductive component and the magnetic field component are connected in series, wherein the inductive component and the magnetic field component are both arranged between two functional arms;

[0039] Figure 8 It is a structural schematic diagram when the inductive component and the magnetic field component are connected in series, wherein the end of a functional arm extends between the inductive component and the magnetic field component, and the ends of the two functional arms are respectively connected to the two ends of the magnetic field component;

[0040] Fig. 9 It is a structural schematic diagram when the inductive component and the magnetic field component are connected in series, wherein the ends of the two functional arms are respectively connected to the two ends of the magnetic field component;

[0041] Fig.10 It is a structural schematic diagram when the ends of the two functional arms are respectively connected to the two ends of the magnetic field component, wherein the inductive component adopts a third coil;

[0042] Fig.11 It is a schematic diagram of the structure when the present invention is provided with a first functional moving body;

[0043] Fig.12 It is a schematic diagram of the structure when two functional arms are arranged in the radial direction of the moving body, wherein a second functional moving body is fixed on the moving body;

[0044] Fig.13 It is a schematic diagram of the structure when two functional arms are arranged in the axial direction of the moving body;

[0045] Fig.14 is a schematic diagram of the structure when the first functional moving body is in a non-detection state, and the first functional moving body is installed on two functional arms;

[0046] Fig.15 is a structural schematic diagram of a first functional moving body in a detection state, wherein the first functional moving body is mounted on the moving body;

[0047] Fig.16 It is a schematic diagram of the structure when an electromagnet is provided in a closed magnetic circuit;

[0048] Fig.17 It is a structural schematic diagram when a moving body is installed on a containing shell, wherein the moving body can slide relative to the containing shell, the enclosed space is filled with air, and a second permanent magnet is installed on the moving body;

[0049] Fig.18 Schematic diagram of the structure when the moving body is installed on the containing shell, wherein the moving body can slide relative to the containing shell, the enclosed space is vacuum, a second permanent magnet is installed on the moving body, a third permanent magnet is installed on the containing shell, and a spring is connected between the second permanent magnet and the third permanent magnet;

[0050] Fig.19 It is a structural schematic diagram when a moving body is installed on a containing shell, wherein the moving body can be elastically deformed relative to the containing shell, the enclosed space is filled with gas or vacuum, and a second permanent magnet is installed on the moving body;

[0051] Fig. 20 It is a structural schematic diagram when a moving body is installed on a containing shell, wherein the moving body can slide relative to the containing shell, the enclosed space is filled with gas or vacuum, and the outside of the moving body is connected to a flying structure;

[0052] Fig.21 A plurality of magnetic grids are arranged at intervals on the moving body;

[0053] Fig. 22 This is a schematic diagram of the structure of the present invention when detecting the external shape of a moving body;

[0054] Fig.23 for Fig. 22 Schematic diagram of the moving body from above.

[0055] The figure shows:

[0056] Inductive component 100 Fourth coil 11

[0057] Magnetic field component 200 First functional moving body 12

[0058] Support shell 1 Second functional moving body 13

[0059] Piezoelectric material body 2 Third functional component 14

[0060] Magnetostrictive body 3 accommodating housing 141

[0061] Functional arm 4 Confined space 15

[0062] Accommodating space 5 Second permanent magnet 16

[0063] Moving body 6 Third permanent magnet 17

[0064] First coil 7 Elastic body 18

[0065] Second coil 8 Flight structure 19

[0066] Third coil 9 Magnetic grid 20

[0067] The first permanent magnet 10 DETAILED DESCRIPTION

[0068] The present invention is described in detail below in conjunction with specific embodiments. The following embodiments will help those skilled in the art to further understand the present invention, but are not intended to limit the present invention in any form. It should be noted that, for those of ordinary skill in the art, several changes and improvements can also be made without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0069] Basic Example:

[0070] The present invention provides a non-contact moving body state detection device, which is used to detect the state of a moving body 6, and includes a supporting shell 1, an inductive component 100 and a magnetic field component 200. The supporting shell 1 is configured to have an accommodating space 5 for matching and accommodating the inductive component 100 and the magnetic field component 200. When the magnetic field of the magnetic field component 200 changes, the inductive component 100 generates an electrical signal that matches the magnetic field change. The moving body 6 and / or an intermediate structure installed on the moving body form a closed magnetic circuit with the magnetic field component 200. The present invention passes an alternating current V through the magnetic field component 200. a When the magnetic field changes, the induction component 100 can output an induced voltage Ves , and when the state of the moving body 6 changes, the magnetization intensity of the closed magnetic circuit increases or decreases, and then the states of different attributes can be calibrated to obtain calibration information, and the calibration information is input into the control system. When the state of the moving body 6 is measured, the control system measures the V es The value obtains the corresponding numerical value in the calibration information and outputs the status value.

[0071] It should be noted that the state in the present invention includes the displacement, velocity, acceleration, gap, surface flatness, surface roughness, material thickness, surface cracks, rotation speed, rotation angle, number of rotations, rotation frequency ( Fig.12 For example, the moving body 6 is a rotating body. When measuring the surface cracks of the rotating body, the magnetic field of the magnetic field component 200 may change due to the bending of the magnetic lines of force in the crack-closed magnetic circuit or the leakage of magnetic flux caused by the local magnetic resistance, thereby finally realizing the detection of the surface crack state.

[0072] When the detected moving body 6 is a moving sheet of different thicknesses, it is arranged in parallel on the desktop and moves in parallel through the detection plane of the detection device (such as the plane formed along the two outer ends of the functional arm 4), the signal of the inductive component 100 will change during the passage, and the moving sheets of different thicknesses cause the induced voltage generated by the inductive component 100 to change accordingly, thereby detecting the thickness of the moving sheet. Therefore, the present invention realizes state and morphology detection by the characteristics of the change of magnetization intensity in the closed magnetic circuit caused by the slight movement of the detected component or the slight defect on the surface of the detected component, making the detection of complex physical quantities simple, convenient, accurate and easy to operate.

[0073] like Fig.21 As shown, equally spaced magnetic grids 20 are provided on the moving body 6. The double-headed arrows in the figure represent the directions in which the moving body 6 can move. The speed of the moving body 6 can be obtained by detecting the influence of multiple magnetic grids 20 on the moving body 6 on the magnetization intensity of the closed magnetic circuit and the distance between adjacent magnetic grids 20 by the detection device.

[0074] like Fig. 22 , Fig.23 As shown, the moving body 6 is a II-shaped structure, and the two ends and the middle have different heights. When the moving body 6 moves, when the moving body 6 moves in a direction parallel to the detection device, the high and low or the hollow parts in the middle of the moving body will cause the magnetization intensity of the closed magnetic circuit to change, thereby realizing the detection of the external shape of the moving body 6.

[0075] The detection device of the present invention calibrates the state and shape of the moving body 6 respectively with the voltage signal V esThe corresponding relationship forms calibration information, that is, the detection device is made into a standard part, and there is a one-to-one correspondence between the state and shape of the measured moving body 6 and the voltage signal generated by the inductive component 100. By calibrating the corresponding relationship, direct detection of the state and shape is achieved. During measurement, the value of the state of the moving body 6 can be directly output to realize the visualization of the numerical value, making the detection simple, convenient and easy to operate. The moving body 6 is preferably made of ferromagnetic material.

[0076] In order to further illustrate the present invention, the present invention is further introduced through specific examples below.

[0077] Embodiment 1:

[0078] In this embodiment, Figure 1 As shown, the magnetic field component 200 includes a magnetostrictor 3 and a first coil 7. The first coil 7 is arranged along the circumference of the magnetostrictor 3 and is used to generate an electromagnetic field when powered. In a specific application, one or more first coils 7 are preferably wrapped around the outside of the magnetostrictor 3. The inductive component 100 includes a piezoelectric material body 2. The magnetostrictor 3 and the piezoelectric material body 2 are arranged in series in the accommodating space 5 in sequence. The piezoelectric material body 2 is used to generate a first induced electrical signal.

[0079] The magnetostrictive body 3 is made of magnetostrictive material, for example, the magnetostrictive material is Galfenol metal alloy material. The Galfenol metal alloy material is also introduced in detail in the microstructure and magnetostrictive properties of Galfenol alloy published by authors Hu Yong, Ding Yutian, Liu Fenxia, ​​Zhang Yanlong, Wang Jing, etc. in "Foundry Technology" (2008 No. 11, 1579-1583, 5 pages in total). It is a new type of magnetostrictive material that can withstand a large force and can be machined, tapped, etc. It is an ideal magnetostrictive material. Another example is terbium dysprosium iron alloy (Terfenol-D) rare earth giant magnetostrictive material, and also for example metallic glass material. The piezoelectric material body 2 is made of piezoelectric material, such as piezoelectric ceramics. When the magnetostrictive body 3 is deformed or has a tendency to deform due to a change in the magnetic field, the degree of extrusion of the piezoelectric material body 2 changes, so that the voltage signal output by the piezoelectric material body 2 changes.

[0080] Furthermore, the support shell 1 can be designed into a variety of shapes to match the specific application environment according to the actual application scenario, such as round, square, oval, etc. In this embodiment, the support shell 1 is a rectangular parallelepiped, and the detection device in this embodiment can be made into a standard part of a portable structure to facilitate movement. When used, the detection device can be placed near the moving body 6 to facilitate the detection of the state. To clearly explain the detection process of the present invention.

[0081] This embodiment is explained by taking the moving body 6 as an axis or a component connected to the axis as an example. In order to detect whether the axis or the component connected to the axis is stable during rotation and whether swinging occurs, the detection device in the present invention can be placed close to the axis. At this time, since the axis is made of ferromagnetic material, the axis and the magnetic field component 200 form a closed magnetic circuit. When the axis swings, the magnetization intensity in the closed magnetic circuit changes, thereby realizing the detection of the axis swing amplitude in the present invention, that is, the radial displacement of the axis.

[0082] In practical applications, the detected moving body 6 is often limited in space due to the restrictions of the installation environment. In order to facilitate detection, the present embodiment further includes two functional arms 4, such as Fig.12 As shown, one end of the two functional arms 4 is installed in the accommodating space 5, one end of one functional arm 4 is arranged between the piezoelectric material body 2 and the supporting shell 1, and the other functional arm 4 is arranged between the magnetostrictive body 3 and the supporting shell 1. The distance between the two functional arms 4 is fixed, and the deformation or deformation tendency of the magnetostrictive body 3 can be transmitted to the piezoelectric material body 2 in the form of force when the magnetic field of the magnetostrictive body 3 changes. The other ends of the two functional arms 4 extend to the outside of the accommodating space 5 and are arranged with a gap with the moving body 6 during detection. The number of functional arms 4 can be flexibly set according to the actual detection environment, for example, set to one, and the situation of setting more than two can also be applied to the actual detection environment, and is specifically set according to the needs of the actual product.

[0083] Furthermore, in addition to detecting the radial swing of the shaft, the axial runout or other conditions of the shaft can also be detected, such as surface flatness, surface roughness, surface cracks, etc. Fig.13 As shown, when the shaft rotates around the direction of rotation, up and down jumping and vibration caused by assembly or its own structure, or due to its own surface flatness, surface roughness, surface cracks, etc., will cause the change of the magnetization intensity inside the closed magnetic circuit, and thus various states can be detected.

[0084] When detecting the state of the moving body 6, such as the above-mentioned shaft swing detection, the swing amplitude of the shaft is often small, although it can also cause the magnetization intensity of the closed magnetic circuit to change, but the detection signal sensitivity is not high. In order to increase the sensitivity of signal extraction, a second functional moving body 13 is fixed along the circumference of the moving body 6, such as Fig.12As shown, the second functional moving body 13 is pasted on the moving body 6 as an intermediate structure or fixed on the moving body 6 by other means such as magnetism. The moving body 6 and the second functional moving body 13 are both made of magnetic materials (such as soft magnetic materials or permanent magnets). By setting the second functional moving body 13, the swinging signal can be amplified when the axis rotates, which greatly improves the sensitivity of the signal change and effectively improves the sensitivity of measuring the swinging state.

[0085] The application of this embodiment is not limited to the above situation, and can also be applied to more fields to detect other physical quantities, such as Fig.17 As shown, in this embodiment, a third functional component 14 and two functional arms 4 are provided, the third functional component 14 includes a housing 141, one end of the two functional arms 4 are both installed in the housing space 5 and directly or indirectly connected to the magnetostrictive body 3, the other ends of the two functional arms 4 are both extended to the outside of the housing space 5 and connected to the housing 141, the housing 141 is provided with an opening, the moving body 6 is matched and installed on the opening, and a closed space 15 is formed between the moving body 6 and the housing 141, and the moving body 6 can slide relative to the housing 141 under the action of an external force. The enclosed space 15 is filled with gas, and the enclosed space 15 also has a second permanent magnet 16, which is installed on the moving body 6. The second permanent magnet 16 is an intermediate structure. The second permanent magnet 16, the functional arm 4, and the magnetostrictive body 3 form a closed magnetic circuit. When the external fluid has a certain flow rate, the force generated by the flow rate acts on the moving body 6, which can make the second permanent magnet 16 move closer to or away from the functional arm 4, thereby causing the magnetization intensity of the closed magnetic circuit to change, and the fluid flow rate can also be detected by this change. Further, the device can not only detect the fluid flow rate, but also detect the moving body 6 at different heights due to the different heights. Due to the different heights from the ground, the external atmospheric pressure is different, and the force of the atmosphere on the moving body is different, which can also make the moving body 6 have a slight movement relative to the accommodating shell 141, and can also cause the magnetization intensity of the closed magnetic circuit to change, and the height of the moving body 6 can also be detected by this change.

[0086] Furthermore, there are various forms of structures for height or flow rate detection. For example, the interior of the enclosed space 15 is set to a vacuum state, and the enclosed space 15 has a second permanent magnet 16 and a third permanent magnet 17. The second permanent magnet 16 is installed on the moving body 6, and the third permanent magnet 17 is installed on the accommodating shell 141. The second permanent magnet 16 and the third permanent magnet 17 are arranged to repel each other magnetically and can balance the suction and repulsion of the vacuum so that the moving body 6 is in a stationary state relative to the accommodating shell 141. When the external flow rate changes or the height changes, the force balance is broken, thereby causing the detection of the movement state of the moving body 6 relative to the accommodating shell 141.

[0087] In order to make the second permanent magnet 16 and the third permanent magnet 17 reach a state of force balance, an elastic body 18 is preferably provided between the second permanent magnet 16 and the third permanent magnet 17, for example, the elastic body 18 is a spring. Specifically, the second permanent magnet 16 and the third permanent magnet 17 can be arranged to repel each other, or the polarities can be arranged to attract each other, and the effect of the present invention can be achieved. For example, when attracting each other, the middle spring can make the two permanent magnets reach a force balance and stillness through the elongation restoring force generated by being squeezed.

[0088] This embodiment can also adopt Fig.19 The structure is such that the moving body 6 can undergo elastic deformation relative to the accommodating shell 141 under the action of external force and can move closer to or away from the functional arm 4. The interior of the enclosed space 15 is in a vacuum state or filled with air. The interior of the enclosed space 15 has a second permanent magnet 16, which is installed on the moving body 6. The moving body 6 adopts an elastic film. When there is a slight change in external force, the elastic film can be driven to deform and drive the second permanent magnet 16 to move slightly, thereby generating a change in the magnetization intensity of the closed magnetic circuit.

[0089] This embodiment can also be modified based on the above structure, such as Fig. 20 As shown, the moving body 6 is connected to a flying structure 19 and the flying structure 19 can rise or fall by relying on its own structure or structural changes when in a fluid environment flowing at a set flow rate, thereby driving the moving body 6 to move closer and farther relative to the containing shell 141, and the magnetic field changes due to the approaching and moving away movements. Fig. 20 The flying structure 19 in the embodiment utilizes the principle of an airplane. For example, in a scenario where a laboratory needs to measure the flow rate of a fluid or the tilt angle of the flying structure 19, V 1 is the flow velocity above the flight structure 19, V 2 is the flow velocity at the lower part of the flight structure 19, when V 1 Greater than V 2 When V 1Less than V 2 When the flying structure 19 is in a downward state, the force F due to the upward or downward movement is obtained. V1-V2 Acting on the moving body 6, the moving body 6 generates a small movement displacement S close to or away from the functional arm 6. V1-V2 The tiny displacement in turn produces a change in the magnetization intensity of the closed magnetic circuit, and the measured state is obtained through the change.

[0090] The above describes the case where the moving body 6 is made of magnetic material. When the moving body 6 is made of non-magnetic metal materials such as aluminum and copper, due to the high-frequency preloaded electromagnetic signal of the magnetostrictive material, it can also electromagnetically excite the surface of the moving body 6 to generate an induced current, thereby generating an induced magnetic field, which will in turn act on the magnetostrictive or magnetostrictive piezoelectric sensor, causing the output voltage of the sensor to change accordingly. The change value can correspond to the physical quantity of the position change such as displacement, swing, gap, etc. or the surface scale and defect change that needs to be measured, thereby realizing the detection of the motion state.

[0091] Furthermore, when the moving body 6 is made of non-metallic material, a first functional moving body 12 is disposed outside the supporting shell 1. The first functional moving body 12 is made of magnetic material. The first functional moving body 12 as an intermediate structure can be set to a variety of structural forms, such as Fig.11 As shown, the first functional moving body 12 includes a detection state and a non-detection state. When in the detection state, the first functional moving body 12 can be installed on the moving body 6 and move simultaneously with the moving body 6. The detected state of the moving body 6 is obtained by detecting the movement state of the first functional moving body 12. When in the non-detection state, the first functional moving body 12 can be matched and installed on the supporting shell 1, thereby achieving the effect of convenient carrying and easy use.

[0092] For different application environments, the first functional moving body 12 can also be configured as a permanent magnet, such as Fig.14 As shown, during the additional test, the permanent magnet can be installed on the moving body 6 to realize the detection, such as Fig.15 shown.

[0093] Specifically, there are multiple connection modes for the arrangement structure of the magnetostrictive body 3 and the piezoelectric body in this embodiment, which are described in detail below:

[0094] Structural form 1:

[0095] like Figure 2As shown, the magnetic field component 200 also includes a second coil 8, which is arranged along the circumference of the magnetostrictive body 3 and is used to generate a second induced electrical signal when the magnetic field of the magnetostrictive body 3 changes. The detection of the motion state can be obtained through the first induced electrical signal or the second induced electrical signal, and the second induced electrical signal can also be used as a verification of the first induced electrical signal.

[0096] Structural form 2:

[0097] In practical applications, in order to make the induction of magnetic field signals more sensitive, the magnetic field component 200 includes a magnet and the magnet can be arranged at any position of the closed magnetic circuit to be sensitive to the magnetic field of the closed magnetic circuit. The electromagnet and / or the first permanent magnet 10 are arranged at any position of the closed magnetic circuit to make the magnetic force of the entire closed magnetic circuit stronger and more sensitive to the change of magnetic force, which is conducive to more accurate determination of the state of the moving body 6, for example, Figure 3 As shown, the first permanent magnet 10 is arranged along the circumference of the magnetostrictive body 3. The installation of the first permanent magnet 10 provides a bias magnetic field for the entire magnetic circuit, thereby improving the magnetization intensity and linearity of the magnetic circuit and improving the sensitivity of the extracted signal.

[0098] Furthermore, an electromagnet may be arranged on the closed magnetic circuit, such as Fig.16 As shown, installing the fourth coil 11 on the closed magnetic circuit can also increase the magnetization intensity of the magnetic circuit and improve the sensitivity of the extracted signal.

[0099] Structural form 3:

[0100] like Figure 7 As shown, the structure of the present invention is provided with two functional arms 4, wherein one end of the magnetostrictor 3 is connected to one end of the piezoelectric material body 2, and the magnetostrictor 3 and the piezoelectric material body 2 connected to each other are installed in the accommodation space 5, wherein the other end of the magnetostrictor 3 and the other end of the piezoelectric material body 2 are respectively in contact with one end of the two functional arms 4, so that the connected magnetostrictor 3 and the piezoelectric material body 2 are adapted to the space between the two functional arms 4, and the interval between the two functional arms 4 provides a fixed distance space for the magnetostrictor 3 and the piezoelectric material body 2 arranged in series, so that when the magnetostrictor 3 is deformed or has a tendency to deform, the tightness between the magnetostrictor 3 and the piezoelectric material body 2 will also change accordingly. At the same time, the moving body 6, the two functional arms 4, and the magnetostrictor 3 together form a closed magnetic circuit. When the moving body 6 rotates, the magnetization intensity of the closed magnetic circuit changes due to its own state, so that the piezoelectric material body 2 is deformed or has a tendency to deform corresponding to the changed magnetization intensity, so that the first induced electrical signal changes.

[0101] Furthermore, if Figure 8 , Fig. 9 They are Figure 7 There are two variations of Figure 8 As shown, the two ends of the magnetostrictive body 3 are respectively connected to one end of the two functional arms 4, and one of the functional arms 4 is arranged between the piezoelectric material body 2 and the magnetostrictive body 3. Fig. 9 As shown, Figure 7 A variation of , can achieve the effect of the present invention.

[0102] Embodiment 2:

[0103] This embodiment is a variation of Embodiment 1.

[0104] In this embodiment, Figure 6 As shown, the magnetostrictive body 3 and the piezoelectric material body 2 are arranged in parallel in the accommodating space 5, and the two ends of the magnetostrictive body 3 are respectively fastened to one end of the two functional arms 4. The piezoelectric material body 2 and the magnetostrictive body 3 are arranged in parallel in the accommodating space and the two ends of the piezoelectric material body 2 are also respectively fastened to one end of the two functional arms 4. In this embodiment, the moving body 6, the two functional arms 4, and the magnetostrictive body 3 together form a closed magnetic circuit, and the magnetostrictive body 3 produces a deformation response or a change in the trend of the deformation response, so that there is a deformation or trend of being stretched or stretched between one end of the two functional arms 4, or the number of reciprocating changes of the deformation or trend of being stretched or stretched per unit time changes, and finally acts on the piezoelectric material body 2, and as the piezoelectric material body 2 is squeezed or loosened, the piezoelectric material body 2 outputs a voltage signal V es The amplitude-frequency characteristics change according to V es The change in is finally used to measure the state of the moving body 6.

[0105] Embodiment 3:

[0106] This embodiment is another variation of Embodiment 1.

[0107] In this embodiment, the inductive component 100 includes a third coil 9, such as Figure 4 As shown, the third coil 9 is arranged along the circumference of the magnetostrictor 3 and is used to generate the first induced electrical signal. In a specific application, it is preferred to wrap one or more third coils 9 around the outside of the magnetostrictor 3. The magnetostrictor 3 is configured to be installed in the accommodation space 5 and both ends of the magnetostrictor 3 are in contact with the inner wall of the supporting shell 1. The moving body 6 and the magnetostrictor 3 together form a closed magnetic circuit. When the magnetostrictor 3 is deformed or has a tendency to deform, the amplitude-frequency change generates the first induced electrical signal V correspondingly. ms , through V ms The detection can also detect the state of the moving body 6.

[0108] To match the detection environment, an appropriate number of functional arms 4 may be added in this embodiment, such as Fig.10 As shown, two functional arms 4 are provided and the two functional arms 4 are respectively installed at the two ends of the magnetostrictive body 3 and the two functional arms 4 are fixed on the supporting shell 1. The two functional arms 4 provide a fixed installation space for the magnetostrictive body 3. When the magnetostrictive body 3 is deformed or has a tendency to deform, the amplitude-frequency change generates a first induced electrical signal V correspondingly. ms , through V ms The detection can also detect the state of the moving body 6.

[0109] like Figure 5 As shown, a variation of this embodiment, wherein the first excitation coil 7 and the third induction coil 9 are the same component, and V ms The end may consider adding resistance, inductance or capacitance to facilitate the collection of V ms Signal can also achieve the detection effect of the present invention.

[0110] In the description of the present application, it should be understood that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do 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 should not be understood as a limitation on the present application.

[0111] The above describes the specific embodiments of the present invention. It should be understood that the present invention is not limited to the above specific embodiments, and those skilled in the art can make various changes or modifications within the scope of the claims, which does not affect the essence of the present invention. In the absence of conflict, the embodiments of the present application and the features in the embodiments can be combined with each other arbitrarily.

Claims

1. A non-contact moving body state detection device, It is characterized in that Used to detect the state of a moving body (6), comprising a supporting shell (1), an inductive component (100) and a magnetic field component (200); The support shell (1) is configured to have an accommodation space (5) therein for matching and accommodating the inductive component (100) and the magnetic field component (200), so that when the magnetic field of the magnetic field component (200) changes, the inductive component (100) generates an electrical signal that matches the change in the magnetic field; The moving body (6) and / or the intermediate structure installed on the moving body (6) and the magnetic field component (200) form a closed magnetic circuit, and the magnetic field change is caused by the state; The magnetic field component (200) comprises a magnetostrictor (3) and a first coil (7), wherein the first coil (7) is arranged along the circumference of the magnetostrictor (3) and is used to generate an electromagnetic field when power is supplied; The inductive component (100) adopts any one of the following structures: The inductive component (100) comprises a piezoelectric material body (2), the magnetostrictive body (3) and the piezoelectric material body (2) are sequentially arranged in series in the accommodation space (5) or arranged in parallel in the accommodation space (5), and the piezoelectric material body (2) is used to generate a first induced electrical signal; The inductive component (100) comprises a third coil (9), the third coil (9) being arranged along the circumference of the magnetostrictive body (3) and being used to generate a first induced electrical signal; It also includes two functional arms (4), wherein the two functional arms (4) have any of the following connection forms: One end of each of the two functional arms (4) is installed in the accommodating space (5) and is capable of transmitting the deformation or deformation tendency of the magnetostrictive body (3) to the piezoelectric material body (2) in the form of force when the magnetic field of the magnetostrictive body (3) changes, and the other end of each of the two functional arms (4) extends to the outside of the accommodating space (5) and is arranged with a gap with the moving body (6); It also includes a third functional component (14), the third functional component (14) including a housing (141), one end of each of the two functional arms (4) being installed in the housing space (5) and directly or indirectly connected to the magnetostrictive body (3), and the other end of each of the two functional arms (4) extending to the outside of the housing space (5) and connected to the housing (141); The accommodating shell (141) is provided with an opening, the moving body (6) is matched and mounted on the opening, and a closed space (15) is formed between the moving body (6) and the accommodating shell (141); the moving body (6) can slide relative to the accommodating shell (141) under the action of an external force, or can undergo elastic deformation, thereby being able to move closer to or away from the functional arm (4); and the interior of the closed space (15) is in a vacuum state or is filled with air, and the interior of the closed space (15) also has any of the following structural arrangements: It comprises a second permanent magnet (16), wherein the second permanent magnet (16) is mounted on the moving body (6); The invention comprises a second permanent magnet (16) and a third permanent magnet (17), wherein the second permanent magnet (16) is mounted on the moving body (6), and the third permanent magnet (17) is mounted on the accommodating shell (141), and the second permanent magnet (16) and the third permanent magnet (17) are arranged to attract or repel each other magnetically, wherein an elastic body (18) is arranged between the second permanent magnet (16) and the third permanent magnet (17), or no elastic body (18) is arranged; Wherein, the second permanent magnet (16) is an intermediate structure; The moving body (6) is also connected to a flying structure (19), and when in a fluid environment flowing at a set flow rate, the flying structure (19) can rise or fall by relying on its own structure or structural changes, thereby driving the moving body (6) to move toward or away from the containing shell (141), and the magnetic field changes due to the approaching and moving away movements.

2. The non-contact moving body state detection device according to claim 1, It is characterized in that The state includes any one or more of the displacement, speed, acceleration, thickness, rotation speed, rotation angle, number of rotations, rotation frequency, gap, surface flatness, surface roughness, and surface cracks of the moving body (6).

3. The non-contact moving body state detection device according to claim 1, It is characterized in that A first functional moving body (12) is arranged outside the supporting shell (1), the first functional moving body (12) is an intermediate structure, and the first functional moving body (12) includes a detection state and a non-detection state; The first functional moving body (12) can be mounted on the moving body (6) in a detection state and move simultaneously with the moving body (6), and the first functional moving body (12) can be matched and mounted on the supporting shell (1) in a non-detection state, wherein: The moving body (6) is made of non-metallic material, and the first functional moving body (12) is made of magnetic material.

4. The non-contact moving body state detection device according to claim 1, It is characterized in that A second functional moving body (13) is fixed along the circumference of the moving body (6); the second functional moving body (13) is an intermediate structure; and both the moving body (6) and the second functional moving body (13) are made of magnetic material.

5. The non-contact moving body state detection device according to claim 1, It is characterized in that The magnetic field component (200) further comprises a second coil (8), which is arranged along the circumference of the magnetostrictive body (3) and is used to generate a second induced electrical signal when the magnetic field of the magnetostrictive body (3) changes.

6. The non-contact moving body state detection device according to claim 1, It is characterized in that The magnetic field component (200) comprises a magnet, and the magnet can be arranged at any position of the closed magnetic circuit to be sensitive to the magnetic field of the closed magnetic circuit.

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