Centrifuge data acquisition device

Abstract

A centrifuge data acquisition device, comprising a first slip ring (31), a second slip ring (32), and a mounting assembly. The first slip ring (31) is spaced apart from the side of a rotating table (11) away from a rotating shaft (13), the first slip ring (31) and the rotating table (11) are coaxially and rotatably arranged, and the second slip ring (32) is arranged at the end of the rotating shaft (13) away from the rotating table (11). The mounting assembly comprises a first support and a second support. In the present application, independently arranged channels are respectively used for acquisition and power supply, an acquisition channel suitable for data acquisition is constructed by means of the first slip ring (31), a power supply channel suitable for power supply is constructed by means of the second slip ring (32), and the first slip ring (31) is arranged on the side of the rotating table (11) away from the rotating shaft (13) so as to avoid electromagnetic interference generated by a motor that drives the rotating shaft (13) to move, thereby reducing the interference between the acquisition channel and the power supply channel. Thus, the accuracy of centrifuge data acquisition is ensured, and the testing precision of precision centrifuges is improved.

Description

Centrifuge data acquisition device

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to a Chinese patent application filed with the Patent Office of China on April 2, 2024, with application number 202410391494.4 and invention name “A Centrifuge Data Acquisition Device,” the entire contents of which are incorporated herein by reference. Technical Field

[0003] The present application relates to the technical field of centrifuge testing equipment, and in particular to a centrifuge data acquisition device. Background Art

[0004] Precision centrifuges primarily provide precise centrifugal acceleration to specimens. Upon reaching their designed acceleration value, the specimen triggers an electrical signal, which the centrifuge then collects and processes. Precision centrifuges typically utilize a combination of a high-precision angular position sensor and a brushless DC torque motor. Closed-loop control outputs precise rotational speed, which is then used to generate precise centrifugal acceleration. Power supply and signal acquisition to the specimen are transmitted via conductive slip rings.

[0005] At present, the same slip ring is used for specimen power supply and specimen collection, which causes the power supply channel to generate electromagnetic interference on the collection channel; the slip ring is installed in the hollow shaft, and the DC brushless torque motor will generate a magnetic field, which will cause electromagnetic interference on the collection channel and affect the accuracy of the collected data.

[0006] As the market's requirements for the accuracy of precision centrifuge data acquisition become increasingly higher, traditionally designed data acquisition devices are unable to meet market demand. There is an urgent need for a device that can improve the accuracy of centrifuge data acquisition to solve the above problem.

[0007] Summary of the Invention

[0008] The purpose of this application is to provide a centrifuge data acquisition device that can improve the accuracy of the centrifuge data acquisition stage and improve the testing accuracy of precision centrifuges.

[0009] The present application provides a centrifuge data acquisition device, the centrifuge comprising a rotating table, a motor, and a rotating shaft, wherein the rotating shaft is arranged at the driving end of the motor and fixedly connected to the lower end of the rotating table, and the rotation axis of the rotating shaft and the rotation axis of the rotating table are arranged collinearly. The centrifuge data acquisition device comprises:

[0010] a first slip ring, spaced apart and arranged on a side of the rotating platform away from the rotating axis, the first slip ring and the rotating platform being configured to rotate coaxially, and the first slip ring being suitable for forming a collection channel;

[0011] a second slip ring, disposed at an end of the rotating shaft away from the rotating table, the second slip ring and the rotating shaft being coaxially arranged, and the second slip ring being suitable for forming a power supply channel;

[0012] And an installation component, the installation component includes a first bracket and a second bracket, the first bracket is arranged on the rotating platform at an interval, the first bracket is fixedly connected to the inner side of the second bracket, the second bracket is suitable for being fixed to the ground side, and the first slip ring is installed on the first bracket.

[0013] Optionally, the centrifuge further includes a base, the mounting assembly further includes a third bracket, the third bracket and the base are fixedly arranged, and the motor is installed in the base;

[0014] The first bracket and the second bracket are fixedly arranged, and the third bracket is fixedly connected to the second bracket.

[0015] Optionally, the second bracket is configured as a cylindrical structure, the first bracket is fixedly disposed in the cylindrical structure; and the third bracket is fixedly configured on the inner wall side of the cylindrical structure.

[0016] Optionally, the first bracket is provided with a first wing portion extending parallel to the axial direction of the cylindrical structure, and the first wing portion is fixedly connected to the inner wall of the second bracket; and / or

[0017] The third bracket is configured as a rotating body structure, and the third bracket is configured with an upward slope from its outer edge side to its inner edge side.

[0018] Optionally, the third bracket is provided with a second wing portion extending parallel to the axial direction of the cylindrical structure, and the second wing portion is suitable for being fixed to the inner wall of the second bracket.

[0019] Optionally, the mounting assembly further comprises an adapter plate and a mounting bracket, the adapter plate is mounted on the rotating table, and the mounting bracket is fixed on the base; the rotating shaft is configured as a hollow shaft structure;

[0020] The centrifuge data acquisition device further includes an electrical connection assembly, the electrical connection assembly including a first socket and a second socket, either socket being mounted on the second bracket;

[0021] The lead wire of the stator end of the first slip ring is electrically connected to the first socket, the lead wire of the rotor end of the first slip ring is electrically connected to the adapter plate, and the adapter plate is suitable for being electrically connected to the test piece through a connecting wire;

[0022] The rotor portion of the second slip ring is fixedly arranged coaxially with the rotating shaft, and the rotor portion of the second slip ring is fixedly arranged with the mounting frame; the lead wire of the stator end of the second slip ring is electrically connected to the second socket, and the lead wire of the rotor end of the second slip ring passes through the interior of the rotating shaft and is suitable for being electrically connected to the test piece.

[0023] Optionally, the second slip ring is sleeved on the rotating shaft, and the radius of the rotating shaft at one end close to the rotating table is larger than the radius of the rotating shaft at the other end close to the second slip ring.

[0024] Optionally, the centrifuge data acquisition device further includes a bearing assembly, which is installed in the base, the bearing assembly and the rotating shaft are rotatably configured, and the bearing assembly is extended along the axial direction of the rotating shaft to extend the bearing span of the rotating shaft.

[0025] Optionally, the mounting assembly further includes a stator fixing seat and a rotor connecting seat; the stator fixing seat and the first bracket are detachably connected, the rotor connecting seat and the rotating table are detachably connected, the rotor connecting seat is sleeved in the first slip ring, and the first slip ring is installed on a side of the stator fixing seat close to the rotor connecting seat.

[0026] Optionally, the centrifuge data acquisition device further comprises a magnetic isolation plate, wherein the magnetic isolation plate is arranged inside the rotating table, and the magnetic isolation plate is extended and laid flat in parallel to the table surface of the rotating table.

[0027] The technical solution provided by this application has the following advantages:

[0028] The centrifuge data acquisition device provided in the present application includes a first slip ring, a second slip ring and a mounting assembly. The first slip ring is arranged at intervals on a side of a rotating table away from a rotating axis, the first slip ring and the rotating table are arranged to rotate coaxially, and the first slip ring is suitable for forming a collection channel; the second slip ring is arranged at an end of the rotating axis away from the rotating table, the second slip ring and the rotating axis are arranged coaxially, and the second slip ring is suitable for forming a power supply channel; the mounting assembly includes a first bracket and a second bracket, the first bracket is arranged at intervals on the rotating table, the first bracket is fixedly connected to the inner side of the second bracket, the second bracket is suitable for being fixed to the ground side, and the first slip ring is mounted on the first bracket.

[0029] The centrifuge data acquisition device of this structure uses independently set channels for data acquisition and power supply. A first slip ring is used to construct an acquisition channel suitable for data acquisition, and a second slip ring is used to construct a power supply channel suitable for power supply. The first slip ring is placed on the side of the turntable away from the rotating shaft to avoid electromagnetic interference generated by the motor driving the rotating shaft, which is conducive to reducing interference between the acquisition channel and the power supply channel. The first slip ring is installed at an interval on the upper end of the turntable through the first bracket in the installation assembly to provide a spatial distance to reduce interference. The first bracket is installed using the second bracket to connect the entire structure. This application can ensure the accuracy of centrifuge data acquisition and improve the testing accuracy of precision centrifuges. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the specific implementation methods of the present application or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the specific implementation methods or the description of the prior art. Obviously, the drawings described below are some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0031] FIG1 is a schematic structural diagram of a centrifuge data acquisition device provided by the present application;

[0032] FIG2 is a schematic diagram showing the principle of the centrifuge data acquisition device provided in this application.

[0033] Description of reference numerals:

[0034] 11-rotating table; 12-motor; 13-rotating axis; 14-base;

[0035] 2-test piece;

[0036] 31-first slip ring; 32-second slip ring;

[0037] 41 - first bracket; 42 - stator fixing seat; 43 - rotor connecting seat; 44 - adapter plate; 45 - second bracket; 46 - third bracket; 47 - mounting frame;

[0038] 5-bearing assembly; 6-magnetic isolation plate;

[0039] 71-first socket; 72-second socket; 73-connecting wire. DETAILED DESCRIPTION

[0040] The following will clearly and completely describe the technical solution of this application in conjunction with the accompanying drawings. Obviously, the embodiments described are only part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of this application.

[0041] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this application and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0042] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0043] In addition, the technical features involved in the different embodiments of the present application described below can be combined with each other as long as they do not conflict with each other.

[0044] Example 1

[0045] This embodiment provides a centrifuge data acquisition device. As shown in Figures 1 and 2, the centrifuge includes a rotating table 11, a motor 12, a rotating shaft 13, and a base 14. The rotating shaft 13 is disposed at the drive end of the motor 12 and is fixedly connected to the lower end of the rotating table 11. The rotation axis of the rotating shaft 13 is collinear with the rotation axis of the rotating table 11. The rotating shaft 13 is configured as a hollow shaft structure. The hollow shaft structure is configured with a cavity suitable for threading. The centrifuge is equipped with a regulated power supply to provide the power conditions required by the motor 12.

[0046] In some embodiments, the centrifuge data acquisition device includes a magnetic isolation plate 6 , as shown in FIG1 . The magnetic isolation plate 6 is disposed in the rotating table 11 , and the magnetic isolation plate 6 extends parallel to the table surface of the rotating table 11 and is flatly arranged.

[0047] In this embodiment, as shown in Figure 1, the centrifuge data acquisition device includes a first slip ring 31, a second slip ring 32 and a mounting assembly. The first slip ring 31 is arranged at intervals on the side of the rotating table 11 away from the rotating shaft 13. The first slip ring 31 and the rotating table 11 are coaxially rotated, and the first slip ring 31 is suitable for forming a collection channel; the second slip ring 32 is arranged at the end of the rotating shaft 13 away from the rotating table 11. The second slip ring 32 and the rotating shaft 13 are coaxially configured, and the second slip ring 32 is suitable for forming a power supply channel; the mounting assembly includes a first bracket 41 and a second bracket 45. The first bracket 41 is arranged at intervals on the rotating table 11, the first bracket 41 is fixedly connected to the inner side of the second bracket 45, the second bracket 45 is suitable for being fixed to the ground side, and the first slip ring 31 is mounted on the first bracket 41.

[0048] The centrifuge data acquisition device provided in this embodiment uses independently set channels for data acquisition and power supply. A first slip ring 31 is used to construct a data acquisition channel suitable for data acquisition, and a second slip ring 32 is used to construct a power supply channel suitable for power supply. The first slip ring 31 is placed on the side of the rotating table 11 away from the rotating shaft 13 to avoid electromagnetic interference generated by the motor 12 that drives the rotating shaft 13. This is conducive to reducing interference between the acquisition channel and the power supply channel. The first slip ring 31 is installed at a distance on the upper end of the rotating table 11 by the first bracket 41 in the mounting assembly to provide a spatial distance to reduce interference. The first bracket 41 is installed using the second bracket 45 to connect the entire structure. This application can ensure the accuracy of centrifuge data acquisition and improve the testing accuracy of precision centrifuges.

[0049] In this embodiment, the centrifuge further includes a mounting assembly and a third bracket 46 . The third bracket 46 and the base 14 are fixedly arranged, and the motor 12 is installed in the base 14 .

[0050] In some embodiments, the first bracket 41 and the second bracket 45 are fixedly arranged, and the third bracket 46 is fixedly connected to the second bracket 45 .

[0051] In some embodiments, the second bracket 45 is configured as a cylindrical structure, the first bracket 41 is fixedly disposed in the cylindrical structure; and the third bracket 46 is fixedly disposed on the inner wall side of the cylindrical structure.

[0052] As an exemplary embodiment, the third bracket 46 is configured as a rotating structure, with an upward slope from its outer edge to its inner edge. A damping member, such as a rubber pad, is provided between the second bracket 45 and the third bracket 46. This arrangement enhances the contact between the base 14, the third bracket 46, and the second bracket 45. This allows radial and circumferential fluctuations and vibrations in the centrifuge and collection device to be transmitted to the side of the second bracket 45 away from the first bracket 41. This not only helps to reduce fluctuations and vibrations in the centrifuge and collection device, but also reduces interference between the centrifuge and collection device.

[0053] In some embodiments, the first bracket 41 is provided with a first wing portion extending parallel to the axial direction of the cylindrical structure, and the first wing portion is fixedly connected to the inner wall of the second bracket 45 .

[0054] In some embodiments, the third bracket 46 is provided with a second wing portion extending parallel to the axial direction of the cylindrical structure, and the second wing portion is adapted to be fixed to the inner wall of the second bracket 45 .

[0055] In this embodiment, as shown in FIG. 1 , the mounting assembly further includes an adapter plate 44 and a mounting bracket 47 . The adapter plate 44 is mounted on the rotating platform 11 , and the mounting bracket 47 is fixed on the base 14 .

[0056] The centrifuge data acquisition device also includes an electrical connection assembly, as shown in FIG1 . The electrical connection assembly includes a first socket 71 and a second socket 72, either of which is mounted on the second bracket 45. The lead wires at the stator end of the first slip ring 31 are electrically connected to the first socket 71, and the lead wires at the rotor end of the first slip ring 31 are electrically connected to the adapter plate 44. The adapter plate 44 is adapted to be electrically connected to the specimen 2 via a connecting wire 73. The rotor portion of the second slip ring 32 is coaxially fixed to the rotating shaft 13 and fixed to the mounting bracket 47. The lead wires at the stator end of the second slip ring 32 are electrically connected to the second socket 72, and the lead wires at the rotor end of the second slip ring 32 pass through the interior of the rotating shaft 13 and are adapted to be electrically connected to the specimen 2. The lead wires at the rotor end of the second slip ring 32 can pass through the rotating table 11 and the magnetic shielding plate 6 therein to connect to the specimen 2.

[0057] The data acquisition device is specifically used to collect electrical signals during the test. The centrifuge data acquisition device is equipped with a filtering module and a data analysis module. The filtering module first processes the signal transmitted by the acquisition channel, and then the data analysis module specifically analyzes it to obtain the desired information.

[0058] In the above description, the lead wires are configured as twisted shielded pairs to reduce interference from electromagnetic signals within the device.

[0059] In some embodiments, the second slip ring 32 is sleeved on the rotating shaft 13 , and the radius of the rotating shaft 13 at one end close to the rotating table 11 is larger than the radius of the rotating shaft 13 at the other end close to the second slip ring 32 .

[0060] In some embodiments, as shown in FIG1 , the centrifuge data acquisition device further includes a bearing assembly 5 , which is mounted in a base 14 , and the bearing assembly 5 and the rotating shaft 13 are rotatably configured, and the bearing assembly 5 is extended along the axial direction of the rotating shaft 13 to extend the bearing span of the rotating shaft 13 ; this arrangement can extend the length of the rotating shaft 13 itself to move away from the magnetic field area of ​​the motor 12 , thereby facilitating long-distance shielding, and at the same time, it is beneficial to strengthen the connection strength of the rotating shaft 13 and reduce the radial runout of the rotating shaft 13 .

[0061] In this embodiment, as shown in Figure 1, the mounting assembly further includes a stator fixing seat 42 and a rotor connecting seat 43; the stator fixing seat 42 and the first bracket 41 are detachably connected, and the rotor connecting seat 43 and the rotating table 11 are detachably connected. The rotor connecting seat 43 is sleeved in the first slip ring 31, and the first slip ring 31 is installed on the side of the stator fixing seat 42 close to the rotor connecting seat 43.

[0062] The present application optimizes the structure of the centrifuge and increases the bearing span so that the motor 12 can be as far away from the rotating table 11 as possible to reduce the influence of the magnetic field.

[0063] Compared with the existing technology, the present application changes the number and functional configuration of the slip rings, and splits the acquisition function and power supply function into two slip rings respectively. In terms of installation method, the present application adopts a bottom-up installation method, which allows both slip rings to be away from the rotating table 11 to reduce the electromagnetic impact of the power supply channel on the acquisition channel.

[0064] This application can reduce the interference and noise of the acquisition channel data, and ensure the accuracy of the centrifugation data of the specimen 2 collected during the operation of the precision centrifuge.

[0065] Obviously, the above embodiments are merely examples for clarity of explanation and are not intended to limit the implementation methods. Those skilled in the art will readily appreciate that other variations or modifications based on the above descriptions are possible. It is not necessary and impossible to enumerate all implementation methods here. Obvious variations or modifications arising therefrom remain within the scope of protection of this application.

Claims

1. A centrifuge data acquisition device, the centrifuge comprising a rotating table (11), a motor (12) and a rotating shaft (13), wherein the rotating shaft (13) is arranged at the driving end of the motor (12), the rotating shaft (13) is fixedly connected to the lower end of the rotating table (11), and the rotation axis of the rotating shaft (13) and the rotation axis of the rotating table (11) are arranged collinearly, characterized in that: The centrifuge data acquisition device comprises: a first slip ring (31) spaced apart on a side of the rotating platform (11) away from the rotating shaft (13); the first slip ring (31) and the rotating platform (11) are configured to rotate coaxially; and the first slip ring (31) is suitable for forming a collection channel; a second slip ring (32) disposed at one end of the rotating shaft (13) away from the rotating platform (11), the second slip ring (32) and the rotating shaft (13) being coaxially arranged, and the second slip ring (32) being suitable for forming a power supply channel; And a mounting assembly, the mounting assembly includes a first bracket (41) and a second bracket (45), the first bracket (41) is arranged on the rotating platform (11) at intervals, the first bracket (41) is installed on the inner side of the second bracket (45), the second bracket (45) is suitable for being fixed to the ground side, and the first slip ring (31) is installed on the first bracket (41).

2. The centrifuge data acquisition device according to claim 1, characterized in that: The centrifuge further comprises a base (14), the mounting assembly further comprises a third bracket (46), the third bracket (46) and the base (14) are fixedly arranged, and the motor (12) is mounted in the base (14); The first bracket (41) and the second bracket (45) are fixedly arranged, and the third bracket (46) is fixedly connected to the second bracket (45).

3. The centrifuge data acquisition device according to claim 2, characterized in that: The second bracket (45) is configured as a cylindrical structure, the first bracket (41) is fixedly disposed in the cylindrical structure, and the third bracket (46) is fixedly disposed on the inner wall side of the cylindrical structure.

4. The centrifuge data acquisition device according to claim 3, characterized in that: The first bracket (41) is provided with a first wing portion extending parallel to the axial direction of the cylindrical structure, and the first wing portion is fixedly connected to the inner wall of the second bracket (45); and / or The third bracket (46) is configured as a rotating body structure, and the third bracket (46) is configured with an upward slope from its outer edge side to its inner edge side.

5. The centrifuge data acquisition device according to claim 4, characterized in that: The third bracket (46) is provided with a second wing portion extending parallel to the axial direction of the cylindrical structure, and the second wing portion is suitable for being fixedly arranged on the inner wall of the second bracket (45).

6. The centrifuge data acquisition device according to claim 2, characterized in that: The mounting assembly further comprises an adapter plate (44) and a mounting frame (47), wherein the adapter plate (44) is mounted on the rotating platform (11), and the mounting frame (47) is fixed on the base (14); the rotating shaft (13) is configured as a hollow shaft structure; The centrifuge data acquisition device further comprises an electrical connection assembly, wherein the electrical connection assembly comprises a first socket (71) and a second socket (72), and either socket is mounted on the second bracket (45); The lead wire of the stator end of the first slip ring (31) is electrically connected to the first socket (71), the lead wire of the rotor end of the first slip ring (31) is electrically connected to the adapter plate (44), and the adapter plate (44) is suitable for being electrically connected to the test piece (2) through a connecting wire (73); The rotor portion of the second slip ring (32) is fixedly arranged coaxially with the rotating shaft (13), and the rotor portion of the second slip ring (32) is fixedly arranged with the mounting frame (47); the lead wire of the stator end of the second slip ring (32) is electrically connected to the second socket (72), and the lead wire of the rotor end of the second slip ring (32) passes through the interior of the rotating shaft (13) and is suitable for being electrically connected to the test piece (2).

7. The centrifuge data acquisition device according to claim 6, characterized in that: The second slip ring (32) is sleeved on the rotating shaft (13), and the radius of one end of the rotating shaft (13) close to the rotating table (11) is larger than the radius of the other end of the rotating shaft (13) close to the second slip ring (32).

8. The centrifuge data acquisition device according to claim 2, characterized in that: The invention also includes a bearing assembly (5), wherein the bearing assembly (5) is installed in the base (14), the bearing assembly (5) and the rotating shaft (13) are rotatably arranged, and the bearing assembly (5) is extended along the axial direction of the rotating shaft (13) to extend the bearing span of the rotating shaft (13).

9. The centrifuge data acquisition device according to claim 1, characterized in that: The mounting assembly further comprises a stator fixing seat (42) and a rotor connecting seat (43); the stator fixing seat (42) and the first bracket (41) are detachably connected, the rotor connecting seat (43) and the rotating platform (11) are detachably connected, the rotor connecting seat (43) is sleeved and arranged in the first slip ring (31), and the first slip ring (31) is installed on a side of the stator fixing seat (42) close to the rotor connecting seat (43).

10. The centrifuge data acquisition device according to claim 1, characterized in that: It also includes a magnetic isolation plate (6), which is arranged in the rotating table (11), and the magnetic isolation plate (6) is extended and laid flat in parallel to the table surface direction of the rotating table (11).

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