A magnetoelectric rotation parameter measuring device

Abstract

The present invention relates to a magnetoelectric rotation parameter measuring device, comprising a shell and a rotating shaft rotatably installed in the shell, and also comprising a permanent magnet component and an induction component accommodated in the shell, wherein the inner wall of the shell is detachably connected to the induction component, and the rotating shaft is detachably connected to the permanent magnet component; the permanent magnet component comprises a mounting sleeve keyed to the rotating shaft, and the outer wall of the mounting sleeve is annularly distributed with several groups of permanent magnets; the present invention uses a shell to encapsulate the rotating shaft, the permanent magnet component and the induction component, and during the rotation of the rotating shaft, the permanent magnet component is driven to rotate synchronously, and the changing magnetic field of the permanent magnet acts on the coil during the rotation of the rotating shaft, and the distance between the permanent magnet and the coil in each group changes sequentially from far to near, so that during the rotation of the rotating shaft, the induced current generated by the coil will also change periodically and regularly, so that the change of the coil induced current is monitored by a first circuit board, and the rotation speed, angular velocity and angular acceleration parameters of the rotating shaft are accurately measured.

Description

Technical Field

[0001] The present invention relates to the technical field of rotation parameter monitoring, and in particular to a magnetoelectric rotation parameter measuring device. Background Art

[0002] Rotation is a common basic form of mechanical motion, which is circular motion. In mechanical design, power is transmitted through the rotation of the rotating shaft. The rotation parameters of various rotating devices set with the rotating shaft, such as speed, angular velocity, angular acceleration, torque, position and other parameters must be monitored in real time to keep track of the working status of the rotating equipment at any time.

[0003] Chinese patent publication number CN106441381B discloses a magnetoelectric rotation parameter measuring device, specifically disclosing that the rotation speed of a rotating shaft is monitored by cooperating with a magnet and a magnetoelectric transducer.

[0004] However, the above-mentioned existing technologies often use related sensors to measure a single rotation parameter. Acquiring a complete set of rotation parameters requires the use of multiple sensors in combination, which is not only inconvenient but also requires matching the transmission structure to the measured rotation parameter. Therefore, to address this issue, a magnetoelectric rotation parameter measurement device is proposed. Summary of the Invention

[0005] The object of the present invention is to provide a magnetoelectric rotation parameter measuring device to solve the problem in the prior art that it is difficult for measuring devices to obtain complete rotation parameters.

[0006] To achieve the above-mentioned object, the present invention provides the following technical solution: a magnetoelectric rotation parameter measuring device, comprising a housing and a rotating shaft rotatably mounted in the housing, and further comprising a permanent magnet assembly and an induction assembly accommodated in the housing, wherein the inner wall of the housing is detachably connected to the induction assembly, the rotating shaft is detachably connected to the permanent magnet assembly, and the permanent magnet assembly and the induction assembly cooperate;

[0007] The permanent magnet assembly includes a mounting sleeve keyed to the rotating shaft, wherein a plurality of groups of permanent magnets are distributed annularly on the outer wall of the mounting sleeve, wherein the individual permanent magnets of each group are arranged in a spiral pattern on the outer wall of the mounting sleeve, and a first shielding sheet detachably connected to the mounting sleeve is provided between adjacent permanent magnets;

[0008] The induction component includes a first positioning plate detachably connected to the inner wall of the shell, and the end surface of the first positioning plate close to the mounting sleeve is provided with a coil that cooperates with the permanent magnet, and the other end surface of the first positioning plate is provided with a first circuit board electrically connected to the coil.

[0009] Preferably, the rotating shaft includes a main shaft and a secondary shaft respectively connected to the two ends of the shell, and a transmission cavity is provided at one end of the main shaft close to the secondary shaft. Elastic sheets are distributed in a ring shape in the transmission cavity, and the two ends of the elastic sheet are respectively slidably connected to the main shaft and the secondary shaft.

[0010] Preferably, the inner end surface of the transmission cavity is provided with annularly distributed transmission teeth, and the side of the secondary shaft extending into the transmission cavity is provided with a tooth groove cooperating with the transmission teeth, and the central angle of the tooth groove is greater than the central angle of the transmission teeth.

[0011] Preferably, it also includes a torque measuring component that is detachably connected to the rotating shaft, and the torque measuring component includes an isolation sleeve and a memory alloy body. The isolation sleeve is mounted on the outer wall of the secondary shaft, and the memory alloy body is fitted with an elastic sheet along the radial direction of the rotating shaft. Both ends of the memory alloy body are connected to a conductive ring mounted on the outer wall of the isolation sleeve through a wire.

[0012] Preferably, the torque measurement assembly also includes a second positioning plate connected to the inner wall of the shell and a second circuit board installed on one end face of the second positioning plate, a mounting hole corresponding to the isolation sleeve is formed in the middle of the second positioning plate, and a brush sheet in contact with the conductive ring is removably provided on the inner wall of the mounting hole, and the second circuit board is electrically connected to the brush sheet.

[0013] Preferably, the housing includes an outer shell and end covers detachably connected to ports on both sides of the outer shell, and both ends of the rotating shaft are rotatably connected to the end covers.

[0014] Preferably, the outer walls of the first positioning plate and the second positioning plate are respectively annularly distributed with a first mounting platform and a second mounting platform, and the inner walls at both ends of the shell are provided with guide grooves, and the guide grooves at both ends of the shell are respectively slidably connected to the first mounting platform and the second mounting platform.

[0015] Preferably, the permanent magnet assembly further comprises an outer shell sleeved on the outside of the mounting sleeve, the outer wall of the outer shell is provided with a plurality of blades distributed in an annular shape, and the end surface of the end cover is provided with heat dissipation holes distributed in an annular shape.

[0016] The present invention has at least the following beneficial effects:

[0017] 1. The present invention uses a housing to encapsulate the rotating shaft, permanent magnet assembly, and induction assembly. During the rotation of the rotating shaft, the permanent magnet assembly is driven to rotate synchronously. As the permanent magnet rotates with the rotating shaft, the changing magnetic field acts on the coil. Furthermore, the distance between the permanent magnet and the coil in each group changes sequentially from far to close. As the rotating shaft rotates, the induced current generated by the coil also changes periodically. Thus, the first circuit board monitors the changes in the coil induced current, accurately measuring the rotating shaft's rotational speed, angular velocity, and angular acceleration parameters.

[0018] 2. The present invention adopts a split rotating shaft, in which the main shaft and the secondary shaft are dynamically linked by an elastic sheet, and the memory alloy body cooperates with the elastic sheet. The memory alloy body is stretched and reset synchronously with the deformation of the elastic sheet, and the deformation of the elastic sheet is monitored by the change in the resistance value of the memory alloy body. The torque of the rotating shaft is monitored by monitoring the deformation of the elastic sheet, and the torque transmission between the main shaft and the secondary shaft is accurately monitored in real time through the torque measurement component, thereby realizing static and dynamic torque measurement of the rotating shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0020] Figure 2 It is a schematic diagram of the rotational section structure of the present invention;

[0021] Figure 3 It is a schematic diagram of the explosion structure of the present invention;

[0022] Figure 4 This is a schematic diagram of the exploded structure of the rotating shaft of the present invention;

[0023] Figure 5 A schematic diagram of the three-dimensional structure of the main shaft of the present invention from another perspective;

[0024] Figure 6 Schematic diagram of the exploded structure of the permanent magnet assembly of the present invention;

[0025] Figure 7 A schematic diagram of the explosion structure of the induction component of the present invention;

[0026] Figure 8 Schematic diagram of the exploded structure of the torque measurement assembly of the present invention.

[0027] In the accompanying drawings:

[0028] 1. Shell; 11. Outer shell; 12. End cover; 13. Bearing; 14. Guide groove; 15. Heat dissipation hole;

[0029] 2. Rotating shaft; 21. Main shaft; 22. Counter shaft; 23. Transmission cavity; 24. Elastic sheet; 25. Positioning hole; 26. Mounting slot; 27. Transmission tooth; 28. Tooth groove;

[0030] 3. Permanent magnet assembly; 31. Mounting sleeve; 32. Positioning slot; 33. Permanent magnet; 34. First shielding sheet; 35. Embedding slot; 36. Outer shell; 37. Blade; 38. Process hole A;

[0031] 4. Induction component; 41. First positioning plate; 42. Wire slot; 43. Coil; 44. Second shielding plate; 45. Insertion slot; 46. First circuit board; 47. First mounting platform; 48. Process hole B;

[0032] 5. Torque measurement assembly; 51. Isolation sleeve; 52. Memory alloy body; 53. Wire; 54. Conductive ring; 55. Second positioning plate; 56. Mounting hole; 57. Brush plate; 58. Second circuit board; 59. Second mounting platform; 510. C process hole. DETAILED DESCRIPTION

[0033] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0034] Example 1

[0035] See also Figure 1-3 The present invention provides a technical solution: a magnetoelectric rotation parameter measuring device, comprising a housing 1 and a rotating shaft 2 rotatably mounted in the housing 1, and further comprising a permanent magnet component 3 and an induction component 4 accommodated in the housing 1, wherein the inner wall of the housing 1 is detachably connected to the induction component 4, the rotating shaft 2 is detachably connected to the permanent magnet component 3, and the permanent magnet component 3 and the induction component 4 cooperate;

[0036] The permanent magnet assembly 3 includes a mounting sleeve 31 keyed to the rotating shaft 2. Specifically, the mounting sleeve 31 cooperates with the hole axis of the rotating shaft 2 and is keyed. A plurality of groups of permanent magnets 33 are distributed annularly on the outer wall of the mounting sleeve 31. Specifically, a positioning groove 32 is provided on the outer wall of the mounting sleeve 31. The permanent magnets 33 are sunk into the positioning groove 32. The monomers of each group of permanent magnets 33 are arranged on the outer wall of the mounting sleeve 31 in a spiral manner. Specifically, the permanent magnets 33 of the same group are arranged in sequence from one end of the mounting sleeve 31 to the other end. A first shielding piece 34 detachably connected to the mounting sleeve 31 is provided between adjacent permanent magnets 33. Specifically, the first shielding piece 34 is an iron piece or other metal piece that constrains the magnetic flux lines. The outer wall of the mounting sleeve 31 is provided with a plurality of embedded grooves 35 distributed annularly, and the first shielding piece 34 is inserted into the embedded groove 35.

[0037] The induction component 4 includes a first positioning plate 41 that is detachably connected to the inner wall of the shell 1. Specifically, the rotating shaft 2 cooperates with the shaft hole of the first positioning plate 41. The end face of the first positioning plate 41 on one side close to the mounting sleeve 31 is provided with a coil 43 that cooperates with the permanent magnet 33. The other end face of the first positioning plate 41 is provided with a first circuit board 46 electrically connected to the coil 43. Specifically, the first circuit board 46 is connected to the coil 43 and monitors changes in its induced current.

[0038] Among them, there are several coils 43. Specifically, the end face of the first positioning plate 41 close to the mounting sleeve 31 is provided with several ring-shaped wire grooves 42, and several coils 43 are sunk and installed in the wire grooves 42. At least one of the several coils 43 has a different number of turns from the other coils 43. A second shielding plate 44 detachably connected to the first positioning plate 41 is provided between adjacent coils 43. Specifically, the end face of the first positioning plate 41 is provided with an insert slot 45, and the second shielding plate 44 is inserted into the insert slot 45. The rotational speed and angular acceleration of the rotating shaft 2 can be calibrated by the change of the induced current of the coils 43 with different numbers of turns, which is beneficial to improving the accuracy of the rotational speed and angular velocity measurement.

[0039] In this embodiment, the rotating shaft 2, the permanent magnet assembly 3 and the induction assembly 4 are encapsulated by the shell 1. During the rotation of the rotating shaft 2, the permanent magnet assembly 3 is driven to rotate synchronously. As the permanent magnet 33 rotates with the rotating shaft 2, the changing magnetic field acts on the coil 43, and the distance between the permanent magnet 33 and the coil 43 in each group changes from far to near, and the magnetic field strength changes from weak to strong. Therefore, during the rotation of the rotating shaft 2, the induced current generated by the coil 43 will also change periodically. The first circuit board 46 monitors the periodic changes of the induced current of the coil 43 to accurately measure the rotational speed, angular velocity, and angular acceleration parameters of the rotating shaft 2.

[0040] Example 2

[0041] See also Figure 1-3 , based on Example 1, the difference is that:

[0042] Among them, the rotating shaft 2 includes a main shaft 21 and a secondary shaft 22 that are respectively rotatably connected to the two ends of the shell 1. Specifically, the main shaft 21 and the secondary shaft 22 are respectively rotatably connected to the end covers 12 at both ends of the shell 11 through bearings 13. A transmission chamber 23 is provided at the end of the main shaft 21 close to the secondary shaft 22. Specifically, a countersunk hole is provided on the inner end surface of the transmission chamber 23, and the countersunk hole is matched with the end of the secondary shaft 22 extending into the transmission chamber 23. Elastic sheets 24 are distributed in an annular manner in the transmission chamber 23. The two ends of the elastic sheet 24 are respectively slidably connected to the main shaft 21 and the secondary shaft 22. Specifically, the inner wall of the transmission chamber 23 and the outer wall of the secondary shaft 22 close to the end of the main shaft 21 are provided with mounting grooves 26. The two ends of the elastic sheet 24 are slidably connected to the mounting grooves 26. The elastic sheet 24 can be slidably positioned by cooperating with the main shaft 21 and the secondary shaft 22, and then the elastic sheet 24 can dynamically link the main shaft 21 and the secondary shaft 22.

[0043] Among them, the inner end surface of the transmission cavity 23 is provided with an annularly distributed transmission teeth 27, and the side of the secondary shaft 22 extending into the transmission cavity 23 is provided with a tooth groove 28 that cooperates with the transmission teeth 27. The central angle of the tooth groove 28 is greater than the central angle of the transmission teeth 27. The tooth groove 28 can cooperate with the transmission teeth 27 to position the connection between the main shaft 21 and the secondary shaft 22, and limit the deformation of the elastic sheet 24. It can protect the elastic sheet 24 when the rotating shaft 2 is initially started, effectively improve the stability of the elastic sheet 24, and limit the applicable range of torque measurement.

[0044] Among them, it also includes a torque measuring component 5 that is detachably connected to the rotating shaft 2. Specifically, the torque measuring component 5 is arranged on the side of the permanent magnet component 3 away from the induction component 4. The torque measuring component 5 includes an isolation sleeve 51 and a memory alloy body 52. ​​The isolation sleeve 51 is sleeved on the outer wall of the secondary shaft 22. Specifically, the isolation sleeve 51 cooperates with the hole axis of the secondary shaft 22 and is connected by screws. The memory alloy body 52 fits the elastic sheet 24 along the radial direction of the rotating shaft 2. Specifically, a positioning hole 25 is provided in the elastic sheet 24. The memory alloy body 52 penetrates the positioning hole 25, and a rubber is passed between the memory alloy body 52 and the elastic sheet 24. The insulating sleeve is used for insulation, and both ends of the memory alloy body 52 are connected to a conductive ring 54 sleeved on the outer wall of the isolation sleeve 51 through a wire 53. Specifically, two conductive rings 54 are provided, and the two conductive rings 54 serve as the positive electrode and the negative electrode of the memory alloy body 52 respectively. That is, the memory alloy body 52 cooperates with the elastic sheet 24, and the memory alloy body 52 is stretched and reset synchronously with the deformation of the elastic sheet 24, and then the deformation of the elastic sheet 24 is monitored by the change in the resistance value of the memory alloy body 52, thereby monitoring the torque of the rotating shaft 2 by monitoring the deformation of the elastic sheet 24, and the torque measurement is more accurate.

[0045] Among them, the torque measurement component 5 also includes a second positioning plate 55 connected to the inner wall of the shell 1 and a second circuit board 58 installed on one end face of the second positioning plate 55. A mounting hole 56 corresponding to the isolation sleeve 51 is formed in the middle of the second positioning plate 55. A brush piece 57 that contacts the conductive ring 54 is removably provided on the inner wall of the mounting hole 56. The second circuit board 58 is electrically connected to the brush piece 57. The brush piece 57 and the second circuit board 58 can be positioned and installed through the second positioning plate 55, and then the conductive ring 54 is electrically connected to the second circuit board 58 through the brush piece 57. The second circuit board 58 then monitors the resistance change of the memory alloy body 52 in real time to obtain the torque change of the rotating shaft 2.

[0046] In this embodiment, the main shaft 21 and the secondary shaft 22 are dynamically linked by the elastic sheet 24, which makes the installation of the torque measurement component 5 more convenient. The memory alloy body 52 cooperates with the elastic sheet 24, so that the memory alloy body 52 is stretched and reset synchronously with the deformation of the elastic sheet 24. Then, the memory alloy body 52 is connected to the conductive ring 54 through the wire 53, and the conductive ring 54 is electrically connected to the second circuit board 58 by the brush sheet 57. Therefore, the deformation of the elastic sheet 24 caused by the force is monitored by monitoring the resistance change of the memory alloy body 52. ​​Then, the torque of the rotating shaft 2 is monitored in real time by monitoring the real-time deformation of the elastic sheet 24, and the torque measurement is more accurate.

[0047] Example 3

[0048] See also Figure 1-3 , based on Example 1, the difference is that:

[0049] Among them, the shell 1 includes an outer shell 11 and end covers 12 that are detachably connected to the ports on both sides of the outer shell 11. The two ends of the rotating shaft 2 are rotatably connected to the end covers 12. Specifically, bearings 13 are set at both ends of the rotating shaft 2. The bearings 13 are sunk into and installed on the end surface of the end cover 12 close to the outer shell 11. The rotating shaft 2, permanent magnet component 3, induction component 4, and torque measurement component 5 can be encapsulated by cooperating with the outer shell 11 and the end cover 12.

[0050] Among them, the outer walls of the first positioning plate 41 and the second positioning plate 55 are respectively annularly distributed with the first mounting platform 47 and the second mounting platform 59, and the inner walls at both ends of the shell 11 are provided with guide grooves 14. The guide grooves 14 at both ends of the shell 11 are respectively slidably connected with the first mounting platform 47 and the second mounting platform 59. The guide grooves 14 can be used to cooperate with the first mounting platform 47 and the second mounting platform 59 respectively to position the sensing component 4 and the torque measurement component 5 into the shell 11, and through the first mounting platform 47 and the second mounting platform 59, the outer sides of the first positioning plate 41 and the second positioning plate 55 cooperate with the inner wall of the shell 11 to form a channel, which is more convenient for heat dissipation.

[0051] Among them, the permanent magnet assembly 3 also includes an outer shell 36 arranged on the outside of the mounting sleeve 31. The outer wall of the outer shell 36 is provided with a number of blades 37 distributed in an annular shape. The end face of the end cover 12 is provided with heat dissipation holes 15 distributed in an annular shape. The permanent magnets 33 distributed on the outer wall of the mounting sleeve 31 can be further encapsulated by the outer shell 36. In the process of the rotating shaft 2 driving the permanent magnet assembly 3 to rotate, a negative pressure is formed in the shell 1 through the blades 37, and the outside air exchanges heat with the air inside the shell 1 through the heat dissipation holes 15, thereby quickly cooling the components in the shell 1, ensuring the temperature stability of the various components inside the shell 1, and effectively avoiding the resistance of the memory alloy body 52 being affected by temperature, thereby improving the accuracy of torque measurement.

[0052] Among them, the ends of the mounting sleeve 31, the first positioning plate 41 and the second positioning plate 55 are respectively provided with process holes A 38, process holes B 48 and process holes C 510, and the process holes A 38, process holes B 48 and process holes C 510 are connected, which can effectively reduce the mass of the mounting sleeve 31, the first positioning plate 41 and the second positioning plate 55 and improve the structural strength.

[0053] In this embodiment, the rotating shaft 2, the permanent magnet component 3, the induction component 4, and the torque measurement component 5 are encapsulated by cooperating with the outer shell 11 and the end cover 12. During the rotation of the rotating shaft 2, the permanent magnet component 3 is driven to rotate synchronously, and then a negative pressure is formed in the shell 1 through the rotating blades 37. The outside air enters the inner cavity of the shell 1 through the heat dissipation holes 15 and exchanges heat with the air inside the shell 1, thereby quickly cooling the components in the shell 1, ensuring the temperature stability of the various components inside the shell 1, and effectively preventing the resistance of the memory alloy body 52 from being affected by temperature, thereby improving the accuracy of torque measurement.

[0054] In summary, by measuring rotational parameters including rotational speed, angular velocity, angular acceleration and torque through this device, more timely and accurate power data can be obtained.

[0055] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, from all points of view, the embodiments should be regarded as illustrative and non-restrictive. The scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes that fall within the meaning and range of equivalents of the claims are included in the present invention. Any reference signs in the claims should not be construed as limiting the claim to which they relate.

[0056] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A magnetoelectric rotation parameter measuring device, comprising a housing (1) and a rotating shaft (2) rotatably mounted in the housing (1), characterized in that: It also includes a permanent magnet component (3) and an induction component (4) accommodated in the shell (1), the inner wall of the shell (1) and the induction component (4) are detachably connected, the rotating shaft (2) and the permanent magnet component (3) are detachably connected, and the permanent magnet component (3) and the induction component (4) cooperate; The permanent magnet assembly (3) includes a mounting sleeve (31) keyed to the rotating shaft (2), a plurality of groups of permanent magnets (33) are annularly distributed on the outer wall of the mounting sleeve (31), the monomers of each group of permanent magnets (33) are arranged in a spiral and spaced apart on the outer wall of the mounting sleeve (31), and a first shielding sheet (34) detachably connected to the mounting sleeve (31) is provided between adjacent permanent magnets (33); The induction component (4) includes a first positioning plate (41) detachably connected to the inner wall of the housing (1); a coil (43) cooperating with the permanent magnet (33) is provided on one end surface of the first positioning plate (41) close to the mounting sleeve (31); and a first circuit board (46) electrically connected to the coil (43) is provided on the other end surface of the first positioning plate (41); The rotating shaft (2) comprises a main shaft (21) and a secondary shaft (22) which are respectively rotatably connected to the two ends of the housing (1); a transmission cavity (23) is provided at one end of the main shaft (21) close to the secondary shaft (22); elastic sheets (24) are distributed in an annular manner in the transmission cavity (23); and the two ends of the elastic sheet (24) are respectively slidably connected to the main shaft (21) and the secondary shaft (22); The inner end surface of the transmission cavity (23) is provided with an annularly distributed transmission teeth (27), and a tooth groove (28) is provided on the side of the secondary shaft (22) extending into the transmission cavity (23) to cooperate with the transmission teeth (27), and the central angle of the tooth groove (28) is greater than the central angle of the transmission teeth (27); The invention also includes a torque measuring assembly (5) detachably connected to the rotating shaft (2), the torque measuring assembly (5) including an isolating sleeve (51) and a memory alloy body (52), the isolating sleeve (51) being sleeved on the outer wall of the secondary shaft (22), the memory alloy body (52) being in contact with the elastic sheet (24) along the radial direction of the rotating shaft (2), and both ends of the memory alloy body (52) being connected to a conductive ring (54) sleeved on the outer wall of the isolating sleeve (51) via a wire (53); The torque measurement assembly (5) further includes a second positioning plate (55) connected to the inner wall of the housing (1) and a second circuit board (58) mounted on an end face of one side of the second positioning plate (55), a mounting hole (56) corresponding to the isolation sleeve (51) is formed in the middle of the second positioning plate (55), a brush sheet (57) in contact with the conductive ring (54) is detachably provided on the inner wall of the mounting hole (56), and the second circuit board (58) is electrically connected to the brush sheet (57).

2. The magnetoelectric rotation parameter measuring device according to claim 1, characterized in that: The housing (1) comprises an outer shell (11) and end covers (12) detachably connected to ports on both sides of the outer shell (11), and both ends of the rotating shaft (2) are rotatably connected to the end covers (12).

3. The magnetoelectric rotation parameter measuring device according to claim 2, characterized in that: The outer walls of the first positioning plate (41) and the second positioning plate (55) are respectively annularly distributed with a first mounting platform (47) and a second mounting platform (59), and the inner walls of both ends of the shell (11) are provided with guide grooves (14), and the guide grooves (14) at both ends of the shell (11) are respectively slidably connected to the first mounting platform (47) and the second mounting platform (59).

4. The magnetoelectric rotation parameter measuring device according to claim 3, characterized in that: The permanent magnet assembly (3) further comprises an outer shell (36) sleeved on the outside of the mounting sleeve (31), the outer wall of the outer shell (36) being provided with a plurality of blades (37) distributed in an annular shape, and the end surface of the end cover (12) being provided with heat dissipation holes (15) distributed in an annular shape.

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