A detection device and detection method for detecting magnetic eccentricity and magnetic declination of a ring-shaped magnetic block

Abstract

The present invention discloses a detection device for detecting magnetic eccentricity and magnetic declination of an annular magnetic block. The detection device includes a housing, a yaw structure disposed inside the housing, and a magnetic eccentricity and magnetic declination detection component. The magnetic eccentricity and magnetic declination detection component includes a photosensitive chip fixed to the lower surface of the top of the yaw frame and a laser fixed inside the housing. The laser beam emitted by the laser is received by the photosensitive chip and processed by a processor to calculate the magnetic eccentricity and magnetic declination. The detection device has a stable structure, and its special yaw structure can be quickly stabilized, so as to measure the magnetic eccentricity and magnetic declination of the annular magnetic block. Its housing uses a low-carbon steel sleeve for magnetic shielding technology to overcome external interference and is suitable for use in a production line.

Description

Technical Field

[0001] The present invention relates to the technical field of automatic detection of workpieces made of special materials, and particularly to a detection device and a detection method for detecting magnetic eccentricity and magnetic declination angle of an annular magnetic block. Background Art

[0002] The magnetic declination angle of an annular magnetic block refers to the declination angle between the ideal magnetization direction and the actual magnetization direction of the ring, which is generated when the product orientation direction and the orientation magnetic field direction are not parallel during the magnetic orientation forming process of the annular magnetic block. Magnetic eccentricity refers to the offset amount between the actual magnetic field center and the ideal magnetic field center of the annular magnetic block.

[0003] In the article "Research on the Measurement Method of Magnetic Declination Angle of Permanent Magnets" (Metrology & Measurement Technique 2014.No 2, authors: Hou Ruifen, etc.), it is proposed that based on the open magnetic circuit magnetic moment measurement principle formed by the combination of Helmholtz coils and a fluxmeter, a combination of a digital fluxmeter and a Helmholtz coil sample stage is used as a measurement device to accurately measure the magnetic declination angle of a permanent magnet. This measurement method obtains the magnetic declination angle by measuring the magnetic fluxes in two directions. The measurement method is cumbersome, the device is complex and the cost is relatively high, and it is impossible to achieve efficient and rapid measurement of a batch of permanent magnets.

[0004] The magnetic declination angle measurement system of the related technology includes a magnetic field detection device. The magnetic field detection device includes a support frame, Helmholtz coils and a test bench. The Helmholtz coils and the test bench are respectively supported on the support frame. When testing a permanent magnet sample with the magnetic declination angle measurement system of the related technology, the permanent magnet sample is placed on the test bench, and the permanent magnet is manually moved to cut the magnetic force lines, so as to achieve the test purpose. However, due to manual operation in the magnetic declination angle measurement system of the related technology, it is difficult to ensure the action consistency, resulting in large measurement errors and low test efficiency. Summary of the Invention

[0005] The object of the present invention is to provide a detection device for detecting magnetic eccentricity and magnetic declination angle of an annular magnetic block in view of the defects of the cumbersome magnetic declination angle measurement method, complex device, large test error and low efficiency in the prior art. The detection device includes a housing, a yaw structure arranged in the housing, and a magnetic eccentricity and magnetic declination angle detection component. The magnetic eccentricity and magnetic declination angle detection component includes a photosensitive chip fixed on the lower surface of the top of the yaw frame and a laser fixed inside the housing. The laser beam emitted by the laser is received by the photosensitive chip and processed by a processor to calculate the magnetic eccentricity and magnetic declination angle.

[0006] Another object of the present invention is to provide a method for detecting magnetic eccentricity and magnetic declination angle of an annular magnetic block by using laser positioning. The principle of this method is simple and has high precision.

[0007] The technical solution adopted to achieve the object of the present invention is as follows:

[0008] A detection device for detecting magnetic eccentricity and magnetic declination of an annular magnetic block, comprising a housing, a yaw structure disposed within the housing, and a magnetic eccentricity and magnetic declination detection component, wherein:

[0009] A positioning component for positioning the annular magnetic block is provided at the top of the housing;

[0010] In its natural state, the yaw structure is coaxial with the annular magnetic block. The yaw structure includes a magnetic conductive ring, a yaw frame whose top is driven by the magnetic conductive ring to yaw, and a stabilizing component for stabilizing the bottom of the yaw frame;

[0011] The magnetic eccentricity and magnetic declination detection component includes a photosensitive chip fixed to the lower surface of the top of the yaw frame and a laser fixed inside the housing.

[0012] A detection device for detecting magnetic eccentricity and magnetic declination of an annular magnetic block, comprising a housing, a yaw structure disposed within the housing, and a magnetic eccentricity and magnetic declination detection component, wherein:

[0013] A positioning component for positioning the annular magnetic block is provided at the top of the housing;

[0014] In its natural state, the yaw structure is coaxial with the annular magnetic block. The yaw structure includes a magnetic conductive ring, a yaw frame whose top is driven by the magnetic conductive ring to yaw, and a stabilizing component for stabilizing the bottom of the yaw frame;

[0015] The magnetic eccentricity and magnetic declination detection component includes a positioning light spot fixed to the lower surface of the top of the yaw frame, an industrial camera and a light source fixed inside the housing through a fixing component. The light source is located between the industrial camera and the positioning light spot. The industrial camera and the light source are on the axis of the annular magnetic block, and the positioning light spot is on the axis of the annular magnetic block in its natural state.

[0016] In the above technical solution, the stabilizing component includes a base fixed to the bottom of the yaw frame, a fixing plate fixed to the bottom of the housing, a centripetal spring group that balancely pulls and fixes the base to the outer periphery of the fixing plate, a support shaft fixed to the lower surface of the fixing plate, and a support shaft socket formed at the center of the base. The end of the support shaft is in contact with the support shaft socket.

[0017] In the above technical solution, the yaw frame includes a circular top support and a bottom support that are coaxial with the magnetic conductive ring. A hanging basket frame is provided between the top support and the bottom support. The magnetic conductive ring is fixed to a ring-shaped protrusion in the middle of the top support. The magnetic conductive ring and the ring-shaped protrusion are within the top opening of the housing. The base is fixed to the upper surface of the bottom support.

[0018] In the above technical solution, the photosensitive chip is fixed at the center position of the lower surface of the top support, and the laser is fixed at the center position of the upper surface of the fixed plate.

[0019] In the above technical solution, the fixed plate is a three-pronged plate. The three-pronged plate is fixed to the bottom of the housing through three columns. The centripetal spring group includes three springs with the same material and length. One end of each spring is fixed to the base, and the other end is fixed to the edge of the three-pronged plate. The three springs are symmetrically arranged with the axis of the annular magnet as the axis of symmetry.

[0020] In the above technical solution, the yaw structure further includes a damping component. The damping component includes a groove formed by the surrounding of the annular protrusion for filling damping oil and a vertical rod fixed to the bottom of the positioning sleeve and extending into the groove but not touching the bottom of the groove.

[0021] In the above technical solution, the magnetic conductive ring is made of iron-nickel alloy.

[0022] In the above technical solution, the positioning component includes a positioning sleeve fixed in the top opening of the housing, two positioning posts fixed above the positioning sleeve and protruding from the top surface of the housing, and an upper positioning surface formed on the top surface of the housing.

[0023] In the above technical solution, the housing includes an upper end cover, a lower end cover and a sleeve. The top opening is located in the middle of the upper end cover. There is a gap between the magnetic conductive ring and the top opening. The columns are fixed on the lower end cover.

[0024] In the above technical solution, a door is provided on the side wall of the sleeve.

[0025] In the above technical solution, the sleeve is made of magnetic shielding material.

[0026] In the above technical solution, the photosensitive chip is communicatively connected to the input end of the processor, and the output end of the processor is communicatively connected to an annular display disk provided on the top of the housing.

[0027] In the above technical solution, the support shaft includes a support large shaft fixed to the lower surface of the fixed plate and a support small shaft in contact with the support shaft socket. The support small shaft is fixed to the bottom of the support large shaft.

[0028] In the above technical solution, a bracket is further included. The bracket includes a frame structure composed of a top plate, a bottom plate and two side plates. An intermediate partition is provided between the top plate and the bottom plate. An opening is provided in the middle of the top plate, and the shape and size of the opening are the same as those of the top of the detection device for detecting the magnetic eccentricity and magnetic declination of the detection annular magnet. The bottom of the detection device for detecting the magnetic eccentricity and magnetic declination of the detection annular magnet is fixed on the intermediate partition, and the top is flush with the top plate.

[0029] In the above technical solution, shock absorbers are provided on the bottom feet of the frame structure.

[0030] For the detection method of the above detection device for detecting the magnetic eccentricity and magnetic declination of the annular magnetic block, the annular magnetic block is placed at a position concentric with the yaw structure on the top of the outer shell through the positioning component, and the magnetic conductive ring is attracted by the annular magnetic block to drive the top of the yaw frame to yaw and move upward in the top opening; the laser beam emitted by the laser is received by the photosensitive chip and processed by the processor to calculate the magnetic eccentricity and magnetic declination.

[0031] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0032] 1. For the measurement method for detecting the magnetic eccentricity and magnetic declination of the annular magnetic block provided by the present invention, the photosensitive chip receives the laser beam emitted by the laser to sense digital information, and transmits this information to the processor communicatively connected thereto, obtaining the radial position of the center of the yaw structure relative to the geometric center of the permanent magnet assembly under the action of the permanent magnet magnetic field, and the phase angle corresponding to this position point, whereby the magnetic eccentricity and magnetic declination of the to-be-detected annular magnetic block can be simply and quickly obtained. This measurement method has a simple principle and high accuracy.

[0033] 2. The detection device for detecting the magnetic eccentricity and magnetic declination of the annular magnetic block provided by the present invention includes an outer shell, a yaw structure arranged inside the outer shell, and a magnetic eccentricity and magnetic declination detection component. The magnetic eccentricity and magnetic declination detection component includes a photosensitive chip fixed to the lower surface of the top of the yaw frame and a laser fixed inside the outer shell. This detection device has a simple and stable structure, and its special yaw structure can quickly stabilize, so as to measure the magnetic eccentricity and magnetic declination of the annular magnetic block. Its outer shell adopts a low-carbon steel sleeve for magnetic shielding technology to overcome external interference and is suitable for application in the production line.

[0034] 3. For the detection device for detecting the magnetic eccentricity and magnetic declination of the annular magnetic block provided by the present invention, the magnetic conductive ring is made of iron-nickel alloy, which has a high magnetic permeability and extremely small residual magnetism that can be ignored. Therefore, in the detection device, after measuring a workpiece and removing the workpiece, the lower magnetic conductive ring will be in a state where the magnetic property can be ignored due to extremely small residual magnetism, and will not interfere with the measurement of the next annular magnetic block, thereby avoiding the influence of residual magnetism on the magnetic eccentricity measurement during batch detection of annular magnetic blocks and improving the detection accuracy.

[0035] 4. When using the detection device for detecting the magnetic eccentricity and magnetic declination of the annular magnetic block provided by the present invention to detect the magnetic declination and magnetic eccentricity of the annular magnetic block, the manual operation is only limited to placing the to-be-detected annular magnetic block at the designated position, and the positioning component greatly reduces the error of manual operation, ensures the action consistency, and improves the detection accuracy and detection efficiency. Description of the Drawings

[0036] Figure 1 The figure shows a schematic structural diagram of a detection device for detecting magnetic eccentricity and magnetic declination of an annular magnet in Embodiment 1.

[0037] Figure 2 The figure shows a schematic structural diagram of a detection device for detecting magnetic eccentricity and magnetic declination of an annular magnet in Embodiment 2.

[0038] Figure 3 The figure shows an enlarged top view of a detection device for detecting magnetic eccentricity and magnetic declination of an annular magnet.

[0039] Figure 4 The figure shows a schematic structural diagram of a bracket.

[0040] In the figure: 1 - positioning sleeve, 1-1 - vertical rod, 2 - screw, 3 - magnetic conductive ring, 4 - upper end cover, 5 - top support, 5-1 - annular protrusion, 6 - sleeve, 7 - hanging basket frame, 8 -, 9 - fixing plate, 10 - earring, 13 - support shaft, 13-1 - large support shaft, 13-2 - small support shaft, 14 - support shaft socket, 15 - base, 16 - bottom support, 17 - fixing nut, 18 - column, 19 - lower end cover, 20 - positioning post, 21 - annular display disc, 22 - dial base, 23 - LED lamp, 24 - hexagon screw, 25 - set screw, 26 - photosensitive chip, 26-1 - positioning light spot, 27 - left side plate, 28 - snap ring, 29 - right side plate, 30 - laser, 30-1 - industrial camera, 31 - camera support, 32 - spring, 33 - arc-shaped gasket, 34 - damping oil, 35 - annular magnet, 36 - top plate, 37 - bottom plate, 38 - intermediate partition, 39 - shock absorber. Specific embodiments

[0041] The present invention will be further described in detail below with reference to specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0042] Embodiment 1

[0043] A detection device for detecting magnetic eccentricity and magnetic declination of an annular magnet includes a housing, a yaw structure disposed in the housing, and a magnetic eccentricity and magnetic declination detection assembly, wherein:

[0044] A positioning assembly for positioning the annular magnet is provided at the top of the housing to ensure that the annular magnet to be measured is coaxial with the yaw structure in the initial state, avoid measurement errors, and improve measurement accuracy.

[0045] The yaw structure is coaxially arranged with the annular magnet in its natural state. The yaw structure includes a magnetic conduction ring 3, a yaw frame whose top is driven by the magnetic conduction ring 3 to yaw, and a stabilizing component for stabilizing the bottom of the yaw frame. There is a gap between the magnetic conduction ring 3 and the top opening formed at the top of the outer shell. The magnetic conduction ring 3 is attracted by the to-be-detected annular magnet and drives the top of the yaw frame to yaw and move upward in the gap.

[0046] Specifically, the stabilizing component includes a base 15 fixed to the bottom of the yaw frame, a fixing plate 9 fixed to the bottom of the outer shell, a centripetal spring group that balancely pulls and fixes the base 15 to the outer periphery of the fixing plate 9, a support shaft 13 fixed to the lower surface of the fixing plate 9, and a support shaft socket 14 formed at the center of the base 15. The end of the support shaft 13 is in contact with the support shaft socket 14.

[0047] When the yaw structure is in its natural state (the state without placing the annular magnet), the yaw structure and the to-be-detected component (the to-be-detected annular magnet) are coaxially arranged. The centripetal spring group provides an upward pulling force to the whole yaw structure, which balances the gravity of the whole yaw structure. When the yaw structure is under the magnetic force of the to-be-detected annular magnet, the support shaft 13 provides a point-contact lower support for the yaw structure, which can ensure that the yaw structure can take the contact point between it and the lower support as the fulcrum, and under the magnetic field of the to-be-detected annular magnet with magnetic eccentricity, it is like an inverted pendulum and presents a radial yaw along the magnetic center direction.

[0048] The magnetic eccentricity and magnetic declination detection component includes a photosensitive chip fixed to the lower surface of the top of the yaw frame and a laser fixed inside the outer shell.

[0049] The magnetic conduction ring 3 is attracted by the to-be-detected annular magnet and drives the top of the yaw frame to yaw in the gap, driving the photosensitive chip 26 fixed to the lower surface of the top of the yaw frame to swing. The photosensitive chip 26 receives the laser beam emitted by the laser 30 to sense digital information, and transmits this information to the processor communicatively connected to it, obtaining the radial position of the center of the yaw structure relative to the geometric center of the magnetic steel assembly under the magnetic field of the permanent magnet, as well as the phase angle corresponding to this position point. Thus, the magnetic eccentricity and magnetic declination of the to-be-detected annular magnet can be obtained simply and quickly, and are displayed on the industrial control computer, and the measured values are automatically stored.

[0050] Embodiment 2

[0051] A detection device for detecting the magnetic eccentricity and magnetic declination of an annular magnet includes an outer shell, a yaw structure arranged inside the outer shell, and a magnetic eccentricity and magnetic declination detection component, wherein:

[0052] The top of the outer shell is provided with a positioning component for positioning the annular magnet;

[0053] In the natural state, the yaw structure is coaxial with the annular magnet. The yaw structure includes a magnetic conduction ring 3, a yaw frame whose top is driven by the magnetic conduction ring 3 to yaw, and a stabilizing component for stabilizing the bottom of the yaw frame.

[0054] The magnetic eccentricity and magnetic declination detection component includes a positioning light spot 26-1 fixed to the lower surface of the top of the yaw frame, an industrial camera 30-1 and a light source fixed in the housing through a fixing component. The light source is located between the industrial camera 30-1 and the positioning light spot 26-1. The industrial camera 30-1 and the light source are on the axis of the annular magnet, and the positioning light spot 26-1 is on the axis of the annular magnet in the natural state.

[0055] The magnetic conduction ring 3 is attracted by the to-be-tested annular magnet, driving the top of the yaw frame to yaw in the gap, driving the positioning light spot 26 fixed to the lower surface of the top of the yaw frame to swing. The industrial camera 30 performs image acquisition and image processing on the positioning light spot 26. The industrial camera 30 is communicatively connected to a processor (i.e., an industrial control computer). After receiving the measurement and processing signal of the industrial camera 30 and combining with the calibration of the vision measurement system, the radial position of the center of the yaw structure relative to the geometric center of the magnetic steel component under the action of the permanent magnet magnetic field and the phase angle corresponding to this position point can be obtained. Thus, the magnetic eccentricity and magnetic declination of the to-be-tested annular magnet can be obtained simply and quickly, and are displayed on the industrial control computer, and the measurement values are automatically stored.

[0056] Specifically, the fixing component includes a camera bracket 31 fixed to the fixing plate 9, a left side plate 27 and a right side plate 29 respectively fixed on both sides of the camera bracket 31, and a retaining ring 28 fixed at the position between the tops of the left side plate 27 and the right side plate 29. The light source is fixed in the retaining ring 28.

[0057] Embodiment 3

[0058] This embodiment details its yaw structure based on Embodiment 1 and Embodiment 2.

[0059] The yaw frame includes a circular top support 5 and a bottom support 16 coaxial with the magnetic conduction ring 3. A hanging basket frame 7 is arranged between the top support 5 and the bottom support 16. The hanging basket frame 7 is three or more uniformly distributed support rods, which can minimize the weight of the yaw structure and facilitate the maintenance of the magnetic tension detection component located inside. The hanging basket frame 7 and the top support 5 are fixed by set screws 25. The magnetic conduction ring 3 is fixed outside the annular protrusion 5-1 in the middle of the top support 5. The base 15 is fixed on the upper surface of the bottom support 16 through a fixing nut 17. The hanging basket frame 7 can be deformed so that the top of the yaw structure offsets while the bottom remains stable.

[0060] The fixing plate 9 is a three-pronged plate, which is fixed to the bottom of the housing by three columns 18. The spring group includes three springs 32 of the same material and length. The bottoms of the three springs 32 are fixed to the base 15, and the tops are fixed to the earrings 10 of the three-pronged plate 9. The three springs are symmetrically arranged with the axis of the annular magnet as the axis.

[0061] In order to avoid the influence of the unbalanced mass of the yaw structure itself (mass errors that may exist during the processing) on ​​the magnetic eccentricity measurement, the yaw structure is constrained by three evenly distributed radial spring groups with consistent stiffness dimensions through structural design, so as to avoid arbitrary rotation of the yaw structure, thereby avoiding the influence of the unbalanced mass of the yaw structure on the magnetic eccentricity measurement. Similarly, with the help of the constraining effect of the radial spring group on the yaw structure, the impact of the yaw structure on the support shaft 13 and the influence on the measurement are avoided. In addition, with the constraining effect of the radial spring group on the yaw structure, when the yaw structure to be measured is evacuated after the measurement is completed, it can also maintain balance with the overall gravity of the yaw structure to achieve the acceptance of the yaw structure, thereby ensuring reliable and efficient measurement.

[0062] At the moment of placing the annular magnetic block to be measured, the magnetic ring 3 drives the deflection structure to swing instantaneously. After the deflection occurs, due to the effect of inertia, the unstable deflection structure will shake. In order to ensure the rapid stabilization of the deflection structure during measurement, alleviate the fluctuation of the deflection structure during the measurement process, and make the measurement stable, the deflection structure also includes a damping component, which includes a groove for filling the damping oil 34 formed by the annular protrusion 5-1 and a vertical rod 1-1 fixed to the bottom of the positioning sleeve 1 and extending into the groove but not contacting the bottom of the groove. The vertical rod 1-1 forms damping with the damping oil 34, and the vertical rod 1-1 does not contact the bottom of the groove, reserving space for the upward movement of the deflection structure. The damping oil is composed of a special component with a flexible blocking effect, which can reduce the shaking of the deflection structure and promote its stability as soon as possible, thereby improving the measurement efficiency.

[0063] As a preferred embodiment, the support shaft 13 includes a large support shaft 13-1 fixed to the lower surface of the fixing plate 9 and a small support shaft 13-2 in contact with the support shaft socket 14, and the small support shaft 13-2 is fixed to the bottom of the large support shaft 13-1. The large support shaft 13-1 ensures sufficient support force to prevent the support shaft 13 from breaking under a large external force, and the small support shaft 13-2 ensures a close fit with the support shaft socket 14.

[0064] As a preferred embodiment, the magnetic conductive ring 3 is made of iron-nickel alloy. Since iron-nickel alloy is a soft magnetic material, it has a high magnetic permeability while the remanence is extremely small and can be ignored. Therefore, in the detection device, after measuring a workpiece and removing it, the magnetic conductive ring 3 will be in a state where the magnetism can be ignored due to the extremely small remanence, and will not interfere with the measurement of the next annular magnetic block, thus avoiding the influence of remanence on the magnetic eccentricity measurement during batch detection of annular magnetic blocks.

[0065] Embodiment 4

[0066] This embodiment details its shell and bracket structure based on Embodiment 1 and Embodiment 2.

[0067] The shell includes an upper end cover 4, a lower end cover 19 and a sleeve 6. An arc-shaped gasket 33 is provided between the lower end cover 19 and the sleeve 6. The top of the upper end cover 4 has an opening. There is a gap between the magnetic conductive ring 3 and the opening formed at the top of the upper end cover 4. The upright column 18 is fixed on the lower end cover 19.

[0068] A door 8 is provided on the side wall of the sleeve 6. Opening the door can facilitate the maintenance operation of the internal components.

[0069] The sleeve 6 is made of magnetic shielding material, preferably low-carbon steel. Due to the magnetic shielding effect of the low-magnetic-resistance ferromagnetic material outer sleeve, the magnetic force lines of the interfering magnetic field will be transferred and shunted along the surface of the sleeve, making the yaw structure in the detection device in a relatively closed magnetic circuit environment, thus avoiding the influence of the dynamic interfering magnetic field on the measurement at the production detection site.

[0070] The photosensitive chip 26 is communicatively connected to the input end of the processor. After receiving the measurement signal from the photosensitive chip 26, the processor converts and displays the magnetic eccentricity value and magnetic declination angle. The output end of the processor is communicatively connected to an annular display disk 21 provided on the upper end cover 4. The annular display disk 21 is embedded in the upper end cover 4, and its upper surface is flush with the upper surface of the upper end cover 4. A dial base 22 is provided below it. The dial base 22 is fixed on the upper end cover 4 by hexagon socket head cap screws 24. LED lights 23 are arranged on the annular display disk 21. Through the LED lights 23 at the corresponding graduations, the magnetic declination measurement result can be intuitively displayed.

[0071] For the convenience of measurement, the comprehensive detection device further includes a bracket. The bracket includes a stable frame structure composed of a top plate 36, a bottom plate 37 and two side plates 40. An intermediate partition 38 is provided between the top plate 36 and the bottom plate 37. An opening is provided in the middle of the top plate 36 with the same shape and size as the top of the annular magnetic block performance detection device. The bottom of the annular magnetic block performance detection device is fixed on the intermediate partition 38, and the top is flush with the top plate 36. The top plate 36 forms a detection platform for convenient and rapid detection.

[0072] As a preferred embodiment, shock absorbers 39 are provided on the bottom support feet of the frame structure to prevent measurement deviation caused by vibration.

[0073] For ease of explanation, spatial relative terms such as "upper", "lower", "left", and "right" are used in the embodiments to describe the relationship of one element or feature shown in the figures relative to another element or feature. It should be understood that, in addition to the orientation shown in the figures, the spatial terms are intended to include different orientations of the device during use or operation. For example, if the device in the figures is inverted, an element described as being "below" other elements or features will be positioned "above" the other elements or features. Thus, the exemplary term "lower" can encompass both upper and lower orientations. The device may be otherwise positioned (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein can be interpreted accordingly.

[0074] Moreover, relative relational terms such as "first" and "second" are only used to distinguish one component with the same name from another, and do not necessarily require or imply any such actual relationship or order between these components.

[0075] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A detection device for detecting magnetic eccentricity and magnetic declination of a ring-shaped magnetic block, characterized in that It includes a housing, a yaw structure disposed within the housing, and a magnetic eccentricity and magnetic declination detection assembly, wherein: A positioning assembly for positioning an annular magnet is provided at the top of the housing; In its natural state, the yaw structure is coaxial with the annular magnet. The yaw structure includes a magnetic conduction ring (3), a yaw frame whose top is driven by the magnetic conduction ring (3) to yaw, and a stabilizing assembly for stabilizing the bottom of the yaw frame; there is a gap between the magnetic conduction ring (3) and the top opening formed at the top of the housing, and the magnetic conduction ring (3) is attracted by the annular magnet to be measured, driving the top of the yaw frame to yaw and move upward within the gap; The magnetic eccentricity and magnetic declination detection assembly includes a photosensitive chip (26) fixed to the lower surface of the top of the yaw frame and a laser (30) fixed inside the housing; The positioning assembly includes a positioning sleeve (1) fixed in the top opening of the housing, two positioning posts (20) fixed above the positioning sleeve (1) and protruding from the top surface of the housing, and an upper positioning surface formed on the top surface of the housing; The yaw frame includes a circular top support (5) coaxial with the magnetic conduction ring (3). The photosensitive chip (26) is fixed at the center position of the lower surface of the top support (5). A fixing plate (9) is fixed to the bottom of the housing, and the laser (30) is fixed at the center position of the upper surface of the fixing plate (9).

2. A detecting device for detecting magnetic eccentricity and magnetic declination of an annular magnetic block, characterized in that It includes a housing, a yaw structure disposed within the housing, and a magnetic eccentricity and magnetic declination detection assembly, wherein: A positioning assembly for positioning an annular magnet is provided at the top of the housing; In its natural state, the yaw structure is coaxial with the annular magnet. The yaw structure includes a magnetic conduction ring (3), a yaw frame whose top is driven by the magnetic conduction ring (3) to yaw, and a stabilizing assembly for stabilizing the bottom of the yaw frame; there is a gap between the magnetic conduction ring (3) and the top opening formed at the top of the housing, and the magnetic conduction ring (3) is attracted by the annular magnet to be measured, driving the top of the yaw frame to yaw and move upward within the gap; The magnetic eccentricity and magnetic declination detection assembly includes a positioning light spot (26-1) fixed to the lower surface of the top of the yaw frame, an industrial camera (30-1) and a light source fixed inside the housing through a fixing component. The light source is located between the industrial camera (30-1) and the positioning light spot (26-1). The industrial camera (30-1) and the light source are on the axis of the annular magnet, and the positioning light spot (26-1) is on the axis of the annular magnet in its natural state; The positioning assembly includes a positioning sleeve (1) fixed in the top opening of the housing, two positioning posts (20) fixed above the positioning sleeve (1) and protruding from the top surface of the housing, and an upper positioning surface formed on the top surface of the housing; The yaw frame includes a circular top support (5) coaxial with the magnetic conduction ring (3).

3. The detecting device for detecting magnetic eccentricity and magnetic declination of the annular magnetic block according to claim 1 or 2, characterized in that, The stable component includes a base (15) fixed to the bottom of the yaw frame, a fixing plate (9) fixed to the bottom of the housing, a centripetal spring group that balancely pulls and fixes the base (15) to the outer periphery of the fixing plate (9), a support shaft (13) fixed to the lower surface of the fixing plate (9), and a support shaft socket (14) formed at the center of the base (15), and the end of the support shaft (13) is in contact with the support shaft socket (14).

4. The detecting device for detecting magnetic eccentricity and magnetic declination of the annular magnetic block according to claim 3, wherein The yaw frame includes a circular top support (5) and a bottom support (16) coaxial with the magnetic conductive ring (3). A hanging basket frame (7) is arranged between the top support (5) and the bottom support (16). The magnetic conductive ring (3) is fixed to a circular protrusion (5-1) in the middle of the top support (5). The magnetic conductive ring (3) and the circular protrusion (5-1) are located in the top opening of the housing, and the base (15) is fixed to the upper surface of the bottom support (16). The yaw structure further includes a damping component. The damping component includes a groove formed by enclosing the circular protrusion (5-1) for filling damping oil (34), and a vertical rod (1-1) fixed to the bottom of the positioning sleeve (1) and extending into the groove but not touching the bottom of the groove.

5. The detecting device for detecting magnetic eccentricity and magnetic declination of the annular magnetic block according to claim 3, characterized in that The fixing plate (9) is a three-pronged plate. The three-pronged plate is fixed to the bottom of the housing by three columns (18). The centripetal spring group includes three springs (32) with the same material and length. One end of each spring (32) is fixed to the base (15), and the other end is fixed to the edge of the three-pronged plate. The three springs are symmetrically arranged with the axis of the annular magnet as the axis of symmetry.

6. The detecting device for detecting magnetic eccentricity and magnetic declination angle of the annular magnetic block according to claim 1 or 2, characterized in that The magnetic conductive ring (3) is made of iron-nickel alloy material.

7. The detecting device for detecting magnetic eccentricity and magnetic declination of the annular magnetic block according to claim 5, wherein, The housing includes an upper end cover (4), a lower end cover (19), and a sleeve (6). The top opening is located in the middle of the upper end cover (4), and the columns (18) are fixed to the lower end cover (19).

8. The detecting device for detecting magnetic eccentricity and magnetic declination of the annular magnetic block according to claim 7, characterized in that, A door (8) is arranged on the side wall of the sleeve (6).

9. The detecting device for detecting magnetic eccentricity and magnetic declination of the annular magnetic block according to claim 7, characterized in that, The sleeve (6) is made of magnetic shielding material.

10. The detecting device for detecting magnetic eccentricity and magnetic declination of an annular magnetic block according to claim 1, wherein, The photosensitive chip (26) is communicatively connected to the input end of the processor, and the output end of the processor is communicatively connected to an annular display disk (21) arranged on the top of the housing.

11. The detecting device for detecting magnetic eccentricity and magnetic declination of the annular magnetic block according to claim 3, wherein, The support shaft (13) includes a support large shaft (13-1) fixed to the lower surface of the fixing plate (9) and a support small shaft (13-2) in contact with the support shaft socket (14). The support small shaft (13-2) is fixed to the bottom of the support large shaft (13-1).

12. The detecting device for detecting magnetic eccentricity and magnetic declination of an annular magnetic block according to claim 1 or 2, characterized in that, It further includes a bracket. The bracket includes a frame structure composed of a top plate (36), a bottom plate (37), and two side plates (40). An intermediate partition (38) is arranged between the top plate (36) and the bottom plate (37). An opening is formed in the middle of the top plate (36) with the same shape and size as the top of the detection device for detecting the magnetic eccentricity and magnetic declination of the detection annular magnet. The bottom of the detection device for detecting the magnetic eccentricity and magnetic declination of the detection annular magnet is fixed to the intermediate partition (38), and the top is flush with the top plate (36).

13. The detecting device for detecting magnetic eccentricity and magnetic declination of an annular magnetic block according to claim 12, wherein, Shock absorbers (39) are arranged on the bottom support feet of the frame structure.

14. The detection method of the detection device for detecting magnetic eccentricity and magnetic declination of the annular magnetic block according to claim 1, characterized in that Place the annular magnet at a position concentric with the yaw structure on the top of the housing through the positioning component. The magnetic conductive ring (3) is attracted by the annular magnet to drive the top of the yaw frame to yaw and move upward in the top opening of the housing top. The laser beam emitted by the laser is received by the photosensitive chip and processed by the processor to calculate the magnetic eccentricity and magnetic declination.

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