Control system and method for a below-the-hook shock mitigation centrifuge

Abstract

The application discloses a control system and method of a shock-absorbing centrifuge with an underlay, and the system comprises a control host, a rotating servo motor and an encoder, the control host is in signal connection with the rotating servo motor, the encoder is in signal connection with the control host, and the rotating servo motor working mode is set by the encoder through the control host; the output end of the rotating servo motor is connected with an original point sensing sheet, the original point sensing sheet corresponds to a photoelectric sensor, and the photoelectric sensor is in signal connection with the encoder; when the rotating servo motor works, the rotating servo motor working mode is adaptively adjusted by the control host according to the parameters recorded by the encoder; the method is that a plurality of shock absorbers are arranged around the rotating servo motor, the rotating center of the original point sensing sheet is overlapped with the central axis of the output shaft of the rotating servo motor, the rotating condition of the original point sensing sheet is collected by the photoelectric sensor, the signal is transmitted to the control host through the encoder, the control host compares the signal with the preset parameters and outputs a control signal to the rotating servo motor, and the problems that, when a centrifuge is used for centrifugal operation of a reagent, the reagent is easily affected by the constant working state of the centrifuge due to the multiple taking and placing requirements of the reagent are expected to be improved.

Description

Technical Field

[0001] This invention relates to centrifuge design, and more specifically to a control system and method for a bottom-mounted shock-absorbing centrifuge. Background Technology

[0002] Centrifuges are a common piece of equipment in scientific research, frequently used in reagent processing. They rotate reagent kits at high speed, using centrifugal force to separate the components in the mixture. Because centrifuges are inherently difficult to maintain perfect balance, slight imbalances occasionally occur during centrifugation. While current centrifuges exhibit curved speed changes during startup and shutdown, this curved approach helps reduce vibration and the associated risks. Gradually increasing the speed during startup ensures relatively smooth operation, avoiding sudden torque shocks and vibrations. Similarly, gradually decreasing the speed during shutdown minimizes the vibration and shock caused by a sudden stop.

[0003] However, in practical use, due to the specific characteristics of the products to be centrifuged, simple handling and speed adjustments are required during centrifugation. Current centrifuges, after reagent handling, suffer from several issues. First, the constant-curve acceleration method of the centrifuge components can lead to vibration and shock during high-speed rotation. Second, reagent handling can cause localized shifts in the centrifuge components' center of gravity or load, resulting in variations in speed increase under different load conditions. This affects the accuracy and repeatability of experiments and processing. Therefore, improving the working condition of the centrifuge components to achieve more stable and ideal centrifuge operation is a worthwhile research area. Summary of the Invention

[0004] The purpose of this invention is to provide a control system and method for a bottom-mounted shock-absorbing centrifuge, which aims to improve the problem that when reagents are centrifuged, they are easily affected by the constant working state of the centrifuge due to the need for multiple loading and unloading of reagents.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0006] A control system for a bottom-mounted shock-absorbing centrifuge includes a control host, a rotary servo motor, and an encoder. The control host is connected to the rotary servo motor, which receives start / stop signals from the control host and drives the centrifugal components of the centrifuge. The encoder is connected to the control host and sets the operating mode of the rotary servo motor via the control host. The output of the rotary servo motor is connected to a point induction plate, which rotates with the rotary servo motor. A photoelectric sensor corresponding to the point induction plate is connected to the control host. When the rotary servo motor is operating, the photoelectric sensor collects the signal passing through the point induction plate and transmits the signal to the control host. The control host adaptively adjusts the operating mode of the rotary servo motor based on the input parameters.

[0007] Preferably, the centrifuge also includes a centrifuge frame, on which the centrifuge component is centrally located. Multiple shock absorbers are provided on the centrifuge frame, and the shock absorbers are arranged in a ring array around the output shaft of the rotary servo motor. The shock absorbers are connected between the centrifuge component and the centrifuge frame.

[0008] Furthermore, the centrifugal component includes a load transfer element and a centrifugal assembly, with a rotary servo motor poweredly connected to the centrifugal assembly; the aforementioned origin induction plate is mounted on the centrifugal assembly; and the aforementioned shock absorbers are respectively connected to the load transfer element and the centrifuge frame.

[0009] Furthermore, a working chamber and an installation cabinet are respectively provided at the upper and lower ends of the centrifuge frame, with the upper end of the centrifuge assembly placed in the working chamber; a cover is hinged to the centrifuge frame; an access port is provided on the outer wall of the cover, and a movable switch door is rotatably provided in the inner cavity of the cover, which rotates within the cover to open or close the access port on the cover.

[0010] A further technical solution is that the aforementioned cover is equipped with a door opening and closing motor, which is poweredly connected to the movable door; the aforementioned cover is also equipped with a door opening position sensor and a door closing position sensor.

[0011] The aforementioned control host is connected to the door opening and closing motor via a relay. Both the door opening position sensor and the door closing position sensor are connected to the control host via signals. Both the door opening position sensor and the door closing position sensor are used to collect the position of the movable door in the cover. The door opening position sensor and the door closing position sensor send the position signal of the movable door to the control host, which receives the position signal from the door opening position sensor or the door closing position sensor and controls the door opening and closing motor to work via the relay.

[0012] When the door opening and closing motor is working, the door opening position sensor or the door opening and closing position sensor collects the signal of the moving door approaching. When the moving door moves to the designated position, the door opening position sensor or the door opening and closing position sensor transmits the signal to the control host, and the control host controls the door opening and closing motor to stop working.

[0013] Preferably, the aforementioned movable switch door has an opening, and the opening is larger than or equal to the retrieval opening on the machine cover; when the retrieval opening is closed, the aforementioned movable switch door and the retrieval opening on the machine cover are misaligned; when the retrieval opening is open, the aforementioned movable switch door and the retrieval opening on the machine cover are positioned opposite each other.

[0014] Preferably, the inner cavity of the cover is provided with a pulley, and a friction belt is fitted on the pulley and the door opening / closing motor. The friction belt is fitted on the movable door, and the door opening / closing motor drives the movable door to open or close the loading / unloading port on the cover through the friction belt.

[0015] A further technical solution is that the inner cavity of the cover is also provided with multiple bearing guide wheels, which abut against the friction strip on the outside of the movable door, and the bearing guide wheels are used to restrict the posture of the movable door.

[0016] This invention also discloses a control method for a bottom-mounted shock-absorbing centrifuge, which is used in conjunction with the control system of the aforementioned bottom-mounted shock-absorbing centrifuge. Multiple shock absorbers surround a rotary servo motor, enabling the shock absorbers to uniformly absorb vibrations and shocks near the rotary servo motor. The rotation center of the origin sensor is aligned with the central axis of the output shaft of the rotary servo motor. A photoelectric sensor collects the rotation status of the origin sensor and transmits the signal to the control host. The control host compares the signal with preset parameters and outputs a control signal to the rotary servo motor.

[0017] Preferably, when the control host adjusts the working mode of the rotary servo motor by preset parameters, the control host sets a clock T for the adjustment period. The photoelectric sensor continuously collects the status information of the rotary servo motor within the time range of clock T and transmits the information to the control host. The control host then calibrates the signal output by the encoder against the preset parameters within the time range of clock T. If the control host calibrates N times within the time range of clock T and a deviation occurs in all N times, the control host temporarily suspends the operation of the rotary servo motor.

[0018] Compared with the prior art, the beneficial effects of the present invention are at least one of the following:

[0019] This invention uses an encoder to preset parameters for the control host, which then controls the rotation of a rotary servo motor. The control host receives real-time speed information and collects this information using a point inductor and a photoelectric sensor. When there is a discrepancy between the clock and the speed, the operating mode of the rotary servo motor can be adaptively adjusted. This method, combined with a corresponding vibration damping structure, effectively reduces vibration and shock in the centrifuge during high-speed rotation, improving its operational stability and smoothness. Furthermore, it significantly reduces unnecessary energy consumption, saving energy costs, thereby improving the centrifuge's efficiency during start-up and shutdown, and mitigating the damage to the centrifuge's structure and lifespan caused by mechanical vibration.

[0020] This invention also features a precise control design using an encoder, which allows for adjustment of the operating mode of the rotary servo motor as needed. This facilitates more precise control of the centrifuge's speed and acceleration. Furthermore, compared to the traditional three-phase motor and driver combination, this application offers better response efficiency, effectively improving the accuracy and repeatability of experiments and processes.

[0021] The load transfer component of this invention receives the rotary servo motor, so that the torque and inertia generated by the rotary servo motor when it is working are transferred to the load transfer component. Multiple shock absorbers distributed in a ring on the load transfer component absorb vibration, and when the vibration force is transmitted, the stress can be relatively dispersed on the shock absorbers, effectively reducing the vibration risk of various parts of the centrifuge. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the system structure of the present invention.

[0023] Figure 2 This is a schematic diagram of the overall structure of the present invention.

[0024] Figure 3 This is a schematic diagram of the installation of a rotary servo motor.

[0025] Figure 4 for Figure 3 A magnified view of the M position.

[0026] Figure 5 This is a schematic diagram of the distribution of the shock absorbers of the present invention.

[0027] Figure 6 This is an installation diagram of an embodiment of the present invention.

[0028] Figure 7 This is a schematic diagram of the installation of the movable door of the present invention.

[0029] Figure 8 This is an installation diagram according to an embodiment of the present invention.

[0030] Explanation of reference numerals in the attached figures:

[0031] 1-Rotary servo motor, 2-Load transmission component, 3-Shock absorber, 4-Centrifuge frame, 5-Matching hole, 6-Reinforcing rod, 7-Centrifuge shell, 11-Origin induction plate, 12-Photoelectric sensor, 13-Working chamber, 14-Mounting cabinet, 15-Cover, 16-Moving switch door, 17-Switch door motor, 18-Pulley, 19-Friction belt, 20-Bearing guide wheel, 201-First fixed plate, 202-Second fixed plate, 203-Connecting assembly, 301-Outer frame bracket, 302-Adjusting bolt, 303-Damping spring component, 304-Shock-absorbing pad, 401-Divider plate, A-Centrifuge assembly. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0033] Currently, centrifuges are widely used. Samples are placed inside centrifuge assembly A. The rotor of this assembly typically has fixtures for holding sample cassettes. The sample cassettes carrying the samples are mounted on these fixtures. When the centrifuge is started, a rotary servo motor drives the rotor of centrifuge assembly A to rotate, which in turn drives the fixtures and sample cassettes to rotate synchronously. The rotor speed can be adjusted according to the output power of the rotary servo motor 1. As the rotor speed increases, the substances in the sample experience increasing centrifugal force until the centrifugal force meets the requirements of the reagents in the sample cassettes. The fixtures are usually symmetrically mounted on centrifuge assembly A to ensure overall structural stability.

[0034] Based on this, a bottom-mounted vibration damping structure for a centrifuge has been independently designed, including a rotary servo motor 1 and a load transfer component 2. The rotary servo motor 1 is fixed on the load transfer component 2, and its output shaft is used for power connection with the input shaft of the centrifuge assembly A. The load transfer component 2 is equipped with several shock absorbers 3, which are arranged in a ring array around the output shaft of the rotary servo motor 1. The shock absorbers 3 need to maintain a certain degree of uniformity on the load transfer component 2 so that the load of the load transfer component 2 can be evenly distributed onto the shock absorbers 3.

[0035] Example 1:

[0036] refer to Figures 1 to 4As shown, one embodiment of the present invention is a control system for a bottom-mounted shock-absorbing centrifuge, including a control host, a rotary servo motor 1, and an encoder. The control host communicates with the rotary servo motor, which receives start / stop signals from the control host and drives the centrifugal components of the centrifuge. Occasionally, the rotary servo motor 1 experiences vibration during operation. This is due to fluctuations in its parameters, such as excessively high or low gain values. Furthermore, unstable or interfering signals controlling the rotary servo motor can also cause vibration during rotation. Through the coordination of the control host and the rotary servo motor 1, precise start / stop control can be achieved, thereby ensuring stable operation of the shock-absorbing centrifuge.

[0037] As an example, the control host includes two complementary functional components: a servo driver and a controller. The control host controls the movement of the rotary servo motor 1. The servo driver is an electronic device responsible for converting control signals into motor motion. It receives instructions from the controller and controls parameters such as the motor's speed and direction accordingly. The controller, on the other hand, is responsible for generating control signals. It generates corresponding control signals based on user requirements and sends them to the servo driver. Therefore, the control host, through the collaborative work of the servo driver and controller, achieves precise control of the rotary servo motor 1.

[0038] Specifically, the encoder is used to acquire the mechanical motion signals of the rotary servo motor 1, that is, to detect the rotation state of the rotary servo motor 1. Simultaneously, the rotary servo motor 1 is connected to a servo driver to receive control signals sent by the servo driver and drive the motor to rotate according to the signals. The controller is connected to the servo driver and is responsible for generating and sending control signals to the servo driver to control the operating mode of the rotary servo motor 1. The controller can be connected to a computer or other control equipment. The controller can communicate with the servo driver via a communication line, and can also interact with the servo driver using preset parameters.

[0039] To ensure the stability of the system and allow for adaptive setting of the operating parameters between the control unit and the rotary servo motor 1 according to actual needs, the encoder is connected to the control unit via signal connection. The encoder sets the operating mode of the rotary servo motor through the control unit. By adjusting the operating mode of the rotary servo motor 1, the vibration and shock of the centrifuge during high-speed rotation can be effectively reduced, improving the stability and smoothness of operation. Furthermore, the encoder can monitor and provide feedback on the rotary servo motor 1 in real time, allowing the control unit to adjust the speed and axial position of the rotary servo motor as needed, thereby achieving automated operation of the centrifuge.

[0040] More importantly, the encoder, in conjunction with the control host, enables higher-precision feedback control of the rotary servo motor 1. When the encoder feeds back the state of the rotary servo motor 1 to the control host, the control host compares the feedback data with a preset target position. Based on the difference between the feedback information and the target position, the controller can precisely adjust the motor to approach or reach the target position. This improves the control accuracy of the rotary servo motor 1 and reduces errors.

[0041] The output terminal of the aforementioned rotary servo motor 1 is connected to a home point sensor 11, which rotates with the rotary servo motor 1. A corresponding photoelectric sensor 12 is connected to the encoder signal. Through the coordinated operation of the encoder, home point sensor 11, and photoelectric sensor 12, the home point sensor 11 and photoelectric sensor 12 are responsible for sensing the dynamic information of the rotary servo motor 1 and transmitting this dynamic information to the control host, which then processes the dynamic information further.

[0042] When the rotary servo motor 1 is working, the photoelectric sensor 12 collects the signal that the origin sensing plate 11 passes through and transmits the signal to the control host. The control host then adaptively adjusts the working mode of the rotary servo motor according to the parameters entered by the encoder.

[0043] On one hand, when the rotary servo motor 1 starts working, it gradually accelerates. As it rotates, the origin sensor 11 connected to its output also begins to rotate. The photoelectric sensor 12 then captures the rotation of the origin sensor 11 and converts it into an electrical signal. Since the origin sensor 11 and the rotary servo motor 1 are relatively fixed in position, the electrical signal can contain information about the motion state of the origin sensor 11, such as rotation angle and speed. This electrical signal is then sent to the control host for processing. This allows the control host to respond quickly; for example, by calling preset parameters to perform the operation.

[0044] On the other hand, the motion state of the rotary servo motor 1 can be monitored and adjusted in real time by the encoder, which objectively benefits the accuracy and stability of the rotary servo motor 1. When necessary, the control host can also adaptively modify and adjust the working mode of the rotary servo motor 1 according to actual needs by using the relative data from the encoder and photoelectric sensor 12.

[0045] Specifically, when the steering servo motor 1 starts rotating, the origin sensing plate 11 rotates along with it. The origin sensing plate 11 passes through the photoelectric sensor 12, which receives changes in the light emitted from the plate. These changes contain information about the angle and speed of the rotation of the rotary servo motor 1. The photoelectric sensor 12 then converts this information into electrical signals, which are further encoded into specific digital signals. The control host adaptively adjusts the operating mode of the rotary servo motor based on the received digital signals. For example, if the motor's rotation angle or speed exceeds a preset parameter range, the control host adjusts the motor according to the signal transmitted by the encoder, restoring it to its ideal operating state. Furthermore, the preset parameters via the encoder facilitate adaptive adjustment of the rotary servo motor 1's operating conditions, achieving precise control.

[0046] As an example, the photoelectric sensor 12 can be an existing device with built-in digital conversion capabilities, which converts electrical signals into digital signals and transmits them to the control host. Alternatively, the control host can also be equipped with an existing analog-to-digital converter to directly receive electrical signals.

[0047] As an example, the most common cause of parameter fluctuations in rotary servo motor 1 is vibration caused by unstable power supply voltage or power supply interference. The power supply of rotary servo motor 1 can be improved by introducing existing filters.

[0048] As an example, in order to ensure the stability and reliability of the control signal between the control host and the rotary servo motor 1, the control host and the rotary servo motor 1 are connected by a cable, thereby ensuring the quality and real-time performance of the signal transmission.

[0049] Example 2:

[0050] Based on the above embodiments, refer to Figure 1 and Figure 5 Another embodiment of the present invention further includes a centrifuge frame 4, on which the centrifuge component is centrally located. Multiple shock absorbers 3 are provided on the centrifuge frame 4. The shock absorbers 3 are arranged in a ring array around the output shaft of the rotary servo motor 1. The shock absorbers 3 are connected between the centrifuge component and the centrifuge frame 4.

[0051] As an example, considering that the shock absorber 3 is arranged around the output shaft of the rotary servo motor 1, its annular layout allows for better balance on the load transfer component 2, thereby reducing the risk of accidental swaying caused by the center of mass shift of the load transfer component 2. This helps the equipment maintain stability even after prolonged high-intensity operation, and through vibration absorption, the upper limit of the rotary servo motor 1's operation can be increased under the same mass conditions. Here, the upper limit of operation can refer to the maximum permissible speed of the rotary servo motor 1 under stable centrifuge conditions and the maximum acceleration during start-up and shutdown.

[0052] An exemplary, feasible setup is as follows: To reduce the noise and vibration risks of the centrifuge, the lower end of the aforementioned shock absorber 3 is connected to the load transfer element 2, and the upper end of the shock absorber 3 is used to connect to the centrifuge frame 4. The shock absorber 3 reduces the relative vibration between the centrifuge frame 4 and the rotary servo motor 1. By absorbing and dispersing the vibration generated by the load transfer element 2, and by forming a fulcrum between the load transfer element 2 and the centrifuge frame 4, the vibration force of the load of the load transfer element 2 during its transmission to the centrifuge frame 4 can be absorbed and slowly released by the shock absorber 3, effectively reducing the noise and vibration risks of the equipment itself.

[0053] An exemplary, feasible setup is to maintain consistency among the shock absorbers 3. These shock absorbers 3 should be of the same specification and model. By ensuring that the shock absorbers 3 create the same damping effect across multiple areas of the load transmission component 2 during vibration, differences in damping can prevent instability in load transmission. Furthermore, using shock absorbers of the same model facilitates the replacement of individual shock absorbers 3 during subsequent maintenance. Additionally, the annular layout of the shock absorbers 3 makes it easier to pinpoint the source of problems or points of discrepancy during equipment commissioning or repair.

[0054] Example 3:

[0055] refer to Figures 1 to 6 As shown, this embodiment is an installation embodiment of the shock absorber 3. The shock absorber 3 includes an outer frame bracket 301. The upper end of the outer frame bracket 301 is fixed on the centrifuge frame 4. The outer frame bracket 301 is provided with an adjusting bolt 302. The adjusting bolt passes through the lower end of the outer frame bracket 301 and connects to the load transmission component 2. The adjusting bolt 302 is provided with a damping spring component 303. The damping spring component 303 is placed inside the outer frame bracket 301.

[0056] Exemplary, Reference Figure 6 As shown, the outer frame support 301 is hollow, and the upper end of the outer frame support 301 is fixed to the centrifuge frame 4 by bolts; the lower part of the outer frame support 301 is fitted with adjusting bolts 302, which pass through the bottom of the outer frame support and are installed on the load transfer component 2; the load transfer component 2 can have pre-drilled mounting holes, so that the lower end of the adjusting bolt 302 is fixed to the load transfer component 2 by bolts.

[0057] The adjusting bolt 302 is equipped with a damping spring 303. When the load transmission component 2 carries the rotary servo motor 1 and generates a vibration load, the vibration load will be transmitted to the adjusting bolt 302 and the damping spring 303 through the load transmission component 2. Since the damping spring 303 is elastic, it will be compressed under the load during the load transmission process, thereby absorbing the vibration energy. When the vibration effect disappears or decreases, the energy temporarily absorbed by the damping spring 303 will be slowly released under the damping action.

[0058] It is worth noting that the top of the damping spring 303 on the adjusting bolt 302 can be fixed by a capped nut, thereby adjusting the compression of the damping spring to meet the performance requirements of different shock absorbers 3.

[0059] Furthermore, a damping pad 304 is provided between the outer frame support 301 and the load transmission component 2. The damping pad 304 is sleeved on the adjusting bolt 302 and abuts against the outer frame support 301 and the load transmission component 2 respectively. By providing the damping pad 304 between the outer frame support 301 and the load transmission component 2, the damping pad 304 can work with the shock absorber 3 to provide additional damping effect, so as to improve both motor vibration and operating condition vibration, further reduce vibration and noise, and improve stability.

[0060] An exemplary, possible setup is as follows: the damping pad 304 can be made of existing polyurethane. The two end faces of the damping pad 304 are respectively attached to and abut against the outer frame bracket 301 and the load transmission component 2. The damping pad 304 reduces the risk of friction and shaking between the outer frame bracket 301 and the load transmission component 2, and at the same time, it directly absorbs and isolates the vibration of the load transmission component 2 during operation.

[0061] Example 4:

[0062] Based on the above embodiments, refer to Figure 1 and Figure 7 As shown, in another embodiment of the present invention, the centrifugal component includes a load transfer element 2 and a centrifugal assembly A, and the rotary servo motor 1 is poweredly connected to the centrifugal assembly A; the aforementioned origin sensing plate 11 is mounted on the centrifugal assembly; and the aforementioned shock absorber 3 is connected to the load transfer element 2 and the centrifuge frame 4 respectively.

[0063] Exemplarily, the output shaft of the rotary servo motor 1 is dynamically connected to the input shaft of the centrifugal component A through a coupling, and the central axis of the output shaft of the rotary servo motor 1 corresponds to the central axis of the input shaft of the centrifugal component A. The above-mentioned rotary servo motor 1 is fixed on the centrifuge structure 4 of the centrifuge. The control host, rotary servo motor and encoder are installed on the above-mentioned centrifuge structure 4; the above-mentioned control host is in signal connection with the rotary servo motor, and the rotary servo motor is used to receive the start-stop signal of the control host and drive the centrifugal component to work;

[0064] It should be noted that if shock absorbers 3 of different specifications and models are used, different vibration damping effects will occur on the load transfer member 2, which may lead to differences in vibration absorption or release in the area of the load transfer member 2, and thus there will be differences in stress in different areas, which may cause unnecessary wear or potential risks.

[0065] One implementation mode that can be adopted by the present invention is:

[0066] Refer Figure 7 As shown, in order to ensure the load transfer efficiency of the load transfer member 2 and improve the stability of the structure. The above-mentioned load transfer member 2 includes a first fixing plate 201 and a second fixing plate 202. The above-mentioned shock absorber 3 is installed on the second fixing plate 202, and the above-mentioned first fixing plate 201 fixes the rotary servo motor 1. A connecting component 203 is provided between the first fixing plate 201 and the second fixing plate 202; the connecting component 203 passes through the centrifuge structure 4 and is respectively connected to the first fixing plate 201 and the second fixing plate 202. The first fixing plate 201 and the second fixing plate 202 are connected by the connecting component 203, and the relative positions between the first fixing plate 201 and the second fixing plate 202 are maintained, so that the connecting component 203 can stably transfer the load between the first fixing plate 201 and the second fixing plate 202.

[0067] Preferably, the first fixing plate 201 and the second fixing plate 202 are circular. Among them, the circular design is easier to determine the relative positions of the first fixing plate 201 and the second fixing plate 202, making the debugging process more accurate. At the same time, the circular design of the first fixing plate 201 and the second fixing plate 202 is also beneficial to reducing the risk of stress concentration of the first fixing plate 201 and the second fixing plate 202 during the working process.

[0068] On one hand, the dimensions of the first fixed disk 201 and the second fixed disk 202 are matched, and the centerline of the second fixed disk 202 overlaps with the centerline of the output shaft of the rotary servo motor 1. This overlap ensures that the output shaft of the rotary servo motor 1 and the input shaft of the centrifugal assembly are on the same straight line, which is beneficial for efficient power transmission. Objectively, the output shaft of the rotary servo motor 1 corresponds to both the centerline of the second fixed disk 202 and the centerline of the first fixed disk 201, thus improving the overall structural balance during rotation or movement. Furthermore, the diameters of the first fixed disk 201 and the second fixed disk 202 can be set to be the same, and the positions of their mating holes 5 correspond to the centers of the first and second fixed disks 201 and 202.

[0069] On one hand, the connecting component 203 is vertically disposed between the first fixed plate 201 and the second fixed plate 202. Both ends of the connecting component 203 are connected between the first fixed plate 201 and the second fixed plate 202, respectively. The first fixed plate 201 and the second fixed plate 202 remain relatively parallel, and the connecting component 203 maintains the load transfer between them. The parallel arrangement of the first fixed plate 201 and the second fixed plate 202 facilitates the consistency and accuracy of load transfer by the connecting component 203, avoiding localized load deviations caused by load skewing. During operation, the force generated by the rotary servo motor 1 is transmitted to the connecting component 203 through the first fixed plate 201, and then to the second fixed plate 202, ultimately acting on the shock absorber 3 on the second fixed plate 202.

[0070] On one hand, the aforementioned connecting assembly 203 consists of multiple vertically arranged connecting rods. For ease of installation, the first fixing plate 201 and the second fixing plate 202 are provided with screw holes for the connecting rods to pass through. The connecting rods pass through these screw holes and are fixed to the first fixing plate 201 and the second fixing plate 202 by nuts. The nuts used are existing anti-slip / anti-loosening nuts. This multi-link distribution also helps mitigate the relative vibration risk generated by the first fixing plate 201 and the second fixing plate 202 during operation. Furthermore, the central axis of the first fixing plate 201 and the central axis of the second fixing plate 202 overlap; the overlap of the central axes of the first fixing plate 201 makes the load transfer between the first fixing plate 201 and the second fixing plate 202 more uniform, minimizing unnecessary lateral loads and stresses.

[0071] On the one hand, both the first fixed plate 201 and the second fixed plate 202 are provided with mating holes 5, and the rotary servo motor 1 is located in the mating hole 5 of the second fixed plate 202; the input shaft of the centrifugal component A passes through the mating hole 5 of the first fixed plate 201 and is powered to the rotary servo motor 1.

[0072] As an example, to ensure that the input shaft of the centrifugal assembly A passes through the mating hole 5 of the first fixed plate 201 and is powered by the rotary servo motor 1, the size of the mating hole 5 needs to meet the space requirements for connecting the centrifugal assembly A and the rotary servo motor 1. The first fixed plate 201 and the second fixed plate 202 are the same size. When the central axes of the first fixed plate 201 and the second fixed plate 202 overlap, the mating holes 5 of the first fixed plate 201 and the second fixed plate 202 can correspond in the vertical direction, thereby ensuring that the input shaft of the centrifugal assembly A and the output shaft of the rotary servo motor 1 can be accurately connected.

[0073] Another approach is to have a reinforcing rod 6 on the first fixed plate 201, which is connected to the housing of the rotary servo motor 1. Multiple reinforcing rods 6 are available, and they can be made of existing metal materials or other existing composite materials that meet the load limit requirements. For ease of installation and adjustment, and because the outer wall of the reinforcing rod 6 is threaded, the first fixed plate 201 has mounting holes that match the reinforcing rod 6. The mounting holes of the first fixed plate 201 have nuts for installing the reinforcing rod 6. These nuts can be double-ended nuts or other anti-slip nuts to prevent the reinforcing rod 6 from vibrating or loosening on the first fixed plate 201.

[0074] Furthermore, in order to reduce the disturbance risk of the centrifuge architecture 4, the centrifuge architecture 4 includes a partition plate 401, which is parallel to the first fixed plate 201. The first fixed plate 201 and the second fixed plate 202 are respectively placed above and below the partition plate 401. The partition plate 401 is provided with a through hole for the input shaft of the connecting assembly 203 and the centrifuge assembly to pass through.

[0075] The upper end of the shock absorber 3 is connected to the bottom of the partition plate 401 in a vertical position, while the lower end of the shock absorber 3 is connected to the second fixed plate 202. The shock absorber 3 is configured to transmit load in the vertical direction. The partition plate 401 has multiple through holes, which simultaneously avoid the load transmission components of the first fixed plate 201 and the second fixed plate 202.

[0076] Example 5:

[0077] Based on the above embodiments, the reference Figure 1 and Figure 8 As shown, in another embodiment of the present invention, a working chamber 13 and an installation cabinet 14 are respectively provided at the upper and lower ends of the centrifuge frame 4, and the upper end of the centrifuge component A is placed in the working chamber 13; a cover 15 is hinged on the centrifuge frame 4; a pick-up and put-out port is provided on the outer wall of the cover 15, and a movable switch door 16 is rotatably provided in the inner cavity of the cover 15, which rotates in the cover 15 to open or close the pick-up and put-out port on the cover 15.

[0078] As an example, the aforementioned cover is hinged to the centrifuge frame and covers the working chamber; the aforementioned rotary servo motor is mounted on the centrifuge frame, and the control host, rotary servo motor and encoder are mounted on the centrifuge frame.

[0079] Furthermore, the aforementioned cover 15 is equipped with a door opening and closing motor 17, which is poweredly connected to the movable door 16; the aforementioned cover 15 is also equipped with a door opening position sensor and a door closing position sensor.

[0080] In this example, the aforementioned cover is hinged to the centrifuge frame 4, covering the working chamber. The aforementioned rotary servo motor is mounted on the centrifuge frame, on which the control host, rotary servo motor, and encoder are installed. The door opening and closing sensors are existing Hall effect sensors. The cover 15 is hinged to the centrifuge frame 4, and opening the cover 15 directly opens the working chamber 13, thereby accommodating the rotating part of the upper end of the centrifuge assembly A. To better protect the sample on the upper part of the centrifuge assembly A, a centrifuge housing 7 is installed on the upper end of the aforementioned load transfer member 2. The centrifuge housing 7 is used to cooperate with the centrifuge assembly A within the working chamber 13 to form a centrifuge chamber. The centrifuge chamber formed by the centrifuge housing 7 is mainly used to accommodate and protect the centrifuge assembly A, especially the rotor structure of the centrifuge assembly A.

[0081] Specifically, the centrifuge housing 7 provides sufficient rotation space for the rotor structure of the centrifuge assembly A. Driven by the rotary servo motor 1, the rotor of the centrifuge assembly A rotates at high speed within the centrifuge chamber formed by the centrifuge housing 7. The centrifuge housing 7 protects the centrifuge assembly A from collisions with other components, thereby avoiding the risk of accidental damage during operation. Simultaneously, the centrifuge housing 7 can partially isolate the centrifuge assembly A during operation, preventing dust and other foreign objects from entering the centrifuge chamber.

[0082] When the movable door 16 is in operation, the centrifuge's rotary servo motor 1 needs to be in a non-started state to ensure the safety of temporarily loading and unloading items. To ensure control, the control host is connected to the door motor 17 via a relay. Both the door opening and closing position sensors are connected to the control host. These sensors are used to collect the position of the movable door 16 within the cover 15. The sensors send the position signals of the movable door 16 to the control host, which receives the signals and controls the door motor via a relay.

[0083] In this process, existing relays are used. These relays can be triggered by control signals from the control host and open or close contacts electromagnetically. Specifically, the reason for using a relay to drive the door opening / closing motor 17 is that relays have low power switching capability and low current control capability; typically, about 10W of power is sufficient for the operating conditions of the door opening / closing motor 17. Relays are generally suitable for low-power and low-current scenarios, and can control the opening and closing of the circuit through the electromagnetic switching mechanism within the relay based on the triggering state of the control signal. Therefore, using a relay for the door opening / closing motor 17 can meet its low power and current driving requirements. At the same time, relays have a certain degree of isolation, forming circuit isolation between the control host and the door opening / closing motor 17, thereby reducing the risk of interference to the door opening / closing motor 17 when the rotary servo motor 1 is operating.

[0084] It should also be noted that, compared to the door opening / closing motor 17, the rotary servo motor 1 of this application typically has a higher power requirement. Therefore, the rotary servo motor 1 usually requires a high-power drive, with a power requirement of approximately 750W. Since the power switching and current control capabilities of relays are limited, to meet the high power requirements of the rotary servo motor 1, it is driven by a servo driver specifically configured in the control host. The servo driver possesses high-power switching capabilities and precise current control capabilities, and can output a high-power current suitable for the rotary servo motor 1 based on the control signal, achieving precise speed and position control. Therefore, the rotary servo motor 1 typically does not require the use of relays, but instead achieves efficient driving and precise control directly through the servo driver configured in the control host.

[0085] When the door opening / closing motor is operating, the door opening position sensor or the door opening / closing position sensor detects the proximity signal of the movable door 16. Once the movable door 16 has moved to the designated position, the door opening position sensor or the door opening / closing position sensor transmits the signal to the control host, which then stops the door opening / closing motor. The specific details are as follows:

[0086] During sample retrieval, the door opening motor 17 drives the movable door 16 to rotate within the cover 15. As the retrieval port on the cover 15 opens, the door position sensor monitors the position of the movable door in real time. When the movable door 16 moves to the fully open position, the sensor sends position information to the control unit. Upon receiving the position signal from the door position sensor, the control unit immediately stops the door opening motor via a relay to prevent excessive rotation of the movable door. At this point, staff can place or remove samples from the working chamber through the open retrieval port.

[0087] After the sample is collected, the control unit will restart the door opening and closing motor, causing the movable door to rotate in the reverse direction within the cover, closing the loading and unloading port. The door closing position sensor then monitors the position of the movable door. When the door approaches the closed position, the sensor sends a signal to the control unit. Upon receiving this signal, the control unit immediately stops the door opening and closing motor via a relay. At this point, the loading and unloading port is completely closed, completing the loading and unloading process. The centrifuge's rotary servo motor 1 can then begin operation.

[0088] Furthermore, the movable switch door 16 has an opening, which is larger than or equal to the access opening on the cover 15. Through its staggered arrangement and relative positional changes, the movable switch door can protect the safe operation of the centrifuge assembly. When the access opening is closed, the movable switch door 16 is staggered from the access opening on the cover 15. This staggered arrangement prevents the centrifuge assembly from being exposed in case of an accident, thus providing protection. When the access opening is open, the movable switch door 16 is positioned opposite the access opening on the cover 15. This relative positioning provides convenient operating space and reduces the risk of accidental damage to the centrifuge assembly.

[0089] Furthermore, the inner cavity of the aforementioned cover 15 is equipped with a pulley 18, and a friction belt 19 is fitted onto the pulley 18 and the door opening / closing motor 17. The friction belt 19 is fitted onto the movable door 16, and the door opening / closing motor 17 drives the movable door 16 to open or close the access port on the cover 15 via the friction belt 19. The friction belt 19, fitted onto the pulley 18 and the door opening / closing motor 17, converts the rotational motion of the door opening / closing motor 17 into the linear motion of the movable door 16, thereby enabling the movable door 16 to open or close the access port on the cover 15. The pulley 18 tensions the friction belt 19, and the friction of the friction belt 19 connects the rotating door opening / closing motor 17 and the movable door 16, thus driving the movement of the movable door 16.

[0090] Furthermore, the inner cavity of the cover 15 is also provided with a plurality of bearing guide wheels 20, which abut against the friction strip 19 on the outside of the movable switch door 16, and the bearing guide wheels are used to restrict the posture of the movable switch door 16.

[0091] Exemplary, the bearing guide wheel 20 is an existing plastic or rubber wheel. The bearing guide wheel 20 provides support and guidance by contacting the friction strip 19 on the outer side of the movable door 16. By contacting the friction strip 19, it limits the posture changes of the movable door 16, preventing it from deviating from its track or becoming unstable during movement. The bearing guide wheel 20 ensures the balance and stability of the movable door 16 during operation, allowing it to smoothly open or close the loading / unloading port on the cover.

[0092] As an example, the centrifuge architecture 4 described above is equipped with a network interface socket and a fan. The fan is connected to the mounting cabinet, and the network interface socket is wired to the communication structure of the control host. The encoder connects to the control host via the network interface. The network interface socket and fan on the centrifuge architecture 4 primarily provide a network communication interface and heat dissipation. The network interface socket is used for communication with the control host. Through a wired connection, the network interface socket connects the centrifuge architecture to the control host to achieve remote monitoring, data transmission, and control command interaction. This allows the control host to obtain data such as the centrifuge's speed and operating status via the encoder and the network interface, and simultaneously send commands to achieve remote control and parameter setting operations. The fan is a heat dissipation device. The centrifuge generates heat during operation. To maintain system stability and reliability, the fan is installed on the centrifuge architecture and connected to the mounting cabinet to promote airflow, aiding in heat dissipation and temperature reduction. This effectively prevents the centrifuge from overheating and causing malfunctions, and extends the equipment's lifespan. Through the wired connection of the network interface socket and the cooling function of the fan, the centrifuge architecture and the control host can communicate and interact stably, and effectively maintain the system's operating temperature within a reasonable range, thereby improving the centrifuge's reliability, safety and ease of control.

[0093] Example 6:

[0094] Another embodiment of the present invention is a control method for a bottom-mounted shock-absorbing centrifuge, which is used in conjunction with the control system of the bottom-mounted shock-absorbing centrifuge described above. Multiple shock absorbers 3 surround a rotary servo motor 1, so that the shock absorbers 3 can uniformly absorb vibrations and shocks near the rotary servo motor 1. The rotation center of the origin sensing plate 11 is aligned with the central axis of the output shaft of the rotary servo motor 1. The rotation status of the origin sensing plate 11 is collected by a photoelectric sensor 12 and the signal is transmitted to the control host. The control host compares the signal with preset parameters and outputs a control signal to the rotary servo motor.

[0095] By surrounding the rotary servo motor 1 with multiple shock absorbers 3, vibrations and shocks near the rotary servo motor are absorbed. Arranging shock absorbers around the rotary servo motor ensures even distribution of absorbed vibrations and shocks, thereby reducing negative impacts on the rotary servo motor and other system components. Simultaneously, by aligning the rotation center of the origin sensing plate 11 with the central axis of the output shaft of the rotary servo motor 1, the photoelectric sensor 12 can accurately acquire the rotation status of the origin sensing plate and transmit this signal to the control host, allowing the control host to easily adjust the operating mode of the rotary servo motor 1 based on actual working conditions.

[0096] Furthermore, when the aforementioned control host adjusts the working mode of the rotary servo motor 1 using preset parameters, the control host sets a clock T for the adjustment period. Typically, the period of clock T is set to approximately 5-10 seconds.

[0097] The aforementioned photoelectric sensor 12 continuously collects the status information of the rotary servo motor 1 within the time range of clock T and transmits the information to the control host. Within the time range of clock T, the control host can calibrate the signal output by the encoder with the preset parameters. If the control host calibrates N times within the time range of clock T and there is a deviation in all N times, the control host will temporarily suspend the operation of the rotary servo motor 1.

[0098] As an example, the encoder is used in conjunction with the photoelectric sensor 12 to obtain and calibrate the working status of the rotary servo motor 1's turntable and output terminal. Suppose that the encoder, in conjunction with the control host, adjusts the rotary servo motor 1 to 3000 rpm. After a continuous clock cycle T, if the status fed back by the photoelectric sensor 12 and the speed obtained by the encoder again do not reach the specified 3000 rpm, or if the sampling difference between the photoelectric sensor 12 and the encoder is too large and exceeds the preset deviation value, it indicates a device malfunction or control risk. In this case, it is necessary to temporarily stop the operation of the rotary servo motor 1 for adjustment or maintenance of the equipment.

[0099] Here, clock T refers to the duration of the set adjustment period, which defines the time range within which the control host calibrates the state of the rotary servo motor. The parameter of clock T can be determined based on the operating conditions and response time of the rotary servo motor, typically within 5-10 seconds. N calibrations indicate that the state of the rotary servo motor is calibrated multiple times within the time range of clock T. Specifically, within each time range of clock T, the control host will collect the state information of the rotary servo motor through photoelectric sensors and compare it with preset parameters. If N calibrations occur within this time period, i.e., N consecutive deviations or errors occur, the control host will take corresponding control actions to temporarily suspend the operation of the rotary servo motor.

[0100] During operation, the control host adjusts the clock T according to preset parameters. Within each clock T period, the photoelectric sensor continuously collects the status information of the rotary servo motor and transmits this information to the control host. The control host compares the signals collected by the photoelectric sensor with the preset parameters to calibrate the status of the rotary servo motor 1. If a continuous deviation is found during N calibrations within the clock T period, the control host temporarily pauses the operation of the rotary servo motor. This ensures that the operating status of the rotary servo motor is consistent with the preset parameters within the clock T period, guaranteeing the stability and accuracy of the system.

[0101] In this specification, terms such as "one embodiment," "another embodiment," "embodiment," and "preferred embodiment" refer to specific features, structures, or characteristics described in connection with that embodiment, which are included in at least one embodiment described in the general description of this application. The appearance of the same term in multiple places in the specification does not necessarily refer to the same embodiment. Furthermore, when a specific feature, structure, or characteristic is described in connection with any embodiment, the intention is to suggest that implementing such a feature, structure, or characteristic in conjunction with other embodiments also falls within the scope of this invention.

[0102] Although the invention has been described herein with reference to several illustrative embodiments, it should be understood that many other modifications and implementations can be devised by those skilled in the art, which will fall within the scope and spirit of the principles disclosed herein. More specifically, various variations and modifications can be made to the components and / or layout of the subject matter arrangement within the scope of the disclosure, drawings, and claims. Besides variations and modifications to the components and / or layout, other uses will be apparent to those skilled in the art.

Claims

1. A control system for a bottom-mounted shock-absorbing centrifuge, characterized in that: It includes a control host, a rotary servo motor (1) and an encoder. The control host communicates with the rotary servo motor. The rotary servo motor (1) is used to receive start and stop signals from the control host and drive the centrifugal components of the centrifuge to work. The encoder is connected to the control host via signal, and the control host outputs settings to set the working mode of the rotary servo motor. The output end of the rotary servo motor (1) is connected to the origin sensing plate (11), the origin sensing plate (11) is used to rotate with the rotary servo motor (1), and the photoelectric sensor (12) corresponding to the origin sensing plate (11) is connected to the control host signal. When the rotary servo motor (1) is working, the photoelectric sensor (12) collects the signal that the origin sensing plate (11) passes through and transmits the signal to the control host; the control host adaptively adjusts the working mode of the rotary servo motor according to the parameters entered by the encoder. The system also includes a centrifuge architecture (4), on which the centrifuge component is centrally located. Multiple shock absorbers (3) are provided on the centrifuge architecture (4). The shock absorbers (3) are arranged in a ring array around the output shaft of the rotary servo motor (1). The shock absorbers (3) are connected between the centrifuge component and the centrifuge architecture (4). The multiple shock absorbers surround the rotary servo motor to absorb vibrations and shocks near the rotary servo motor. The centrifugal component includes a load transfer element (2) and a centrifugal assembly. A rotary servo motor (1) is powered to the centrifugal assembly. The origin sensing plate (11) is mounted on the centrifugal assembly. The shock absorber (3) is connected to the load transfer element (2) and the centrifuge frame (4) respectively. The centrifuge frame (4) is provided with a working chamber (13) at the top and a mounting cabinet (14) at the bottom. The upper end of the centrifuge assembly is placed in the working chamber (13). The centrifuge frame (4) is hinged to a cover (15). The outer wall of the cover (15) is provided with a pick-up and drop-off port. The inner cavity of the cover (15) is provided with a movable switch door (16). The movable switch door (16) rotates in the cover (15) and opens or closes the pick-up and drop-off port on the cover (15). The cover (15) is equipped with a door opening and closing motor (17). The control host is connected to the door opening and closing motor via a relay. The cover (15) is also equipped with a door opening position sensor and a door closing position sensor. The control host receives the position signal of the door opening position sensor or the door closing position sensor and controls the door opening and closing motor to work via a relay. When the control host adjusts the working mode of the rotary servo motor (1) by preset parameters, the control host sets the clock T of the adjustment period. The clock T is usually set to a period of about 5-10 seconds. When the control host calibrates N times within the range of clock T, if there is a deviation in all N times, the control host temporarily stops the operation of the rotary servo motor (1).

2. The control system for the bottom-mounted shock-absorbing centrifuge according to claim 1, characterized in that: The door opening and closing motor (17) is poweredly connected to the movable door opening and closing door (16); Both the door opening and closing sensors are connected to the control host for signal transmission. Both sensors are used to acquire the position of the movable door (16) within the cover (15). The door opening and closing sensors transmit the position signal of the movable door (16) to the control host. When the door opening and closing motor is working, the door opening position sensor or the door opening and closing position sensor collects the signal of the moving door (16) approaching. When the moving door (16) moves to the designated position, the door opening position sensor or the door opening and closing position sensor transmits the signal to the control host, and the control host controls the door opening and closing motor to stop working.

3. The control system for the bottom-mounted shock-absorbing centrifuge according to claim 2, characterized in that: The movable switch door (16) has an opening, and the opening is larger than or equal to the take-up and put-down opening on the cover (15); when the take-up and put-down opening is closed, the movable switch door (16) and the take-up and put-down opening on the cover (15) are misaligned; when the take-up and put-down opening is open, the movable switch door (16) and the take-up and put-down opening on the cover (15) are opposite to each other.

4. The control system for the bottom-mounted shock-absorbing centrifuge according to claim 1, characterized in that: The inner cavity of the cover (15) is provided with a pulley (18), and a friction belt (19) is fitted on the pulley (18) and the door opening and closing motor (17). The friction belt (19) is fitted on the movable door (16), and the door opening and closing port on the cover (15) is driven by the door opening and closing motor (17) through the friction belt (19).

5. The control system for the bottom-mounted shock-absorbing centrifuge according to claim 1, characterized in that: The inner cavity of the cover (15) is also provided with multiple bearing guide wheels (20), which abut against the friction strip (19) on the outside of the movable switch door (16) and are used to restrict the posture of the movable switch door (16).

6. A control method for a bottom-mounted shock-absorbing centrifuge, used in conjunction with the control system of the bottom-mounted shock-absorbing centrifuge according to any one of claims 1 to 5, characterized in that: Multiple shock absorbers (3) are arranged around the rotary servo motor (1) so that the shock absorbers (3) can uniformly absorb the vibration and shock near the rotary servo motor (1). The rotation center of the origin sensor (11) is aligned with the central axis of the output shaft of the rotary servo motor (1). The photoelectric sensor (12) collects the rotation of the origin sensor (11) and transmits the signal to the control host. The control host compares the signal with the preset parameters and outputs the control signal to the rotary servo motor (1).

7. The control method for a bottom-mounted shock-absorbing centrifuge according to claim 6, characterized in that: When the control host adjusts the working mode of the rotary servo motor (1) by preset parameters, the control host sets a clock T for the adjustment period. The photoelectric sensor (12) continuously collects the status information of the rotary servo motor (1) within the time range of clock T and transmits the information to the control host. The control host then calibrates the signal output by the encoder with the preset parameters within the time range of clock T. If the control host calibrates N times within the clock T range and a deviation occurs in all N times, the control host will temporarily suspend the operation of the rotary servo motor (1).

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