A magnetorheological fluid pulsation regulating device and its regulating method

Abstract

The present invention provides a magnetorheological fluid pulsation regulating device and a regulating method thereof. The regulating device includes: an electromagnetic induction coil module and a signal acquisition and processing unit; the electromagnetic induction coil module is arranged at the magnetorheological fluid ejection end of the magnetorheological fluid circulation system pipeline; the signal acquisition and processing unit communicates with the electromagnetic induction coil module through signal transmission; the signal acquisition and processing unit is used for acquiring the magnetorheological fluid pulsation signal in the magnetorheological fluid circulation system pipeline, converting the pulsation signal into an electric signal, and transmitting the electric signal to the electromagnetic induction coil module; the electromagnetic induction coil module is used for generating an alternating magnetic field according to the electric signal to change the viscosity of the magnetorheological fluid, thereby suppressing the pulsation signal of the magnetorheological fluid in the magnetorheological fluid circulation system pipeline. The present invention can actively suppress the amplitude of pulsation in the magnetorheological fluid circulation system using a peristaltic pump, and improve the machining accuracy of ultra-large caliber complex curved surfaces.

Description

Technical Field

[0001] The present invention relates to the technical field of optical element processing, and particularly relates to a magnetorheological fluid pulsation regulating device and a regulating method thereof. Background Art

[0002] The processing of complex curved surfaces of optical elements generally adopts the CCOS technology, i.e., the computer-controlled small grinding head processing technology. In the traditional process, the grinding head uses optical asphalt material; when processing large-aperture (2 m) or extra-large-aperture (4 m) reflectors, since the processing time for traversing the entire reflector is relatively long (generally more than 8 hours), the asphalt polishing disc is prone to problems such as deformation and aging during the processing under large pressure and long time, resulting in a large deviation between the removal function and the theoretical calculation, and thus the single-pass processing convergence rate decreases. If the magnetorheological processing technology is adopted, since the magnetorheological polishing head is a Bingham body with a certain hardness formed by the magnetorheological fluid under the action of a strong magnetic field, as the circulation system operates, the hardened magnetorheological fluid continuously participates in the polishing of the reflector. Therefore, during the processing of extra-large-aperture reflectors by the magnetorheological process, problems such as aging and deformation of asphalt in the traditional process will not occur, and thus the surface shape convergence rate of single-pass processing is also improved, ultimately effectively improving the processing efficiency and reducing the processing time.

[0003] In a common magnetorheological fluid circulation pipeline, the driving force of the liquid mainly comes from a peristaltic pump. The advantage of using a peristaltic pump is that the supply quantity is accurate and the magnetorheological fluid does not come into direct contact with the mechanical structure of the power source, so it will not cause pollution to the magnetorheological fluid. However, the problem with using a peristaltic pump is that the liquid has regular pulsations during the circulation process, which affects the precise process control of magnetorheological processing. During the processing of extra-large apertures, a higher material removal rate is required, so the rotation speed of the peristaltic pump is increased, resulting in an accelerated pulsation frequency of the magnetorheological fluid. The general approach to dealing with this situation is to add a damper system to the pipeline, which can effectively reduce the amplitude of liquid pulsations and belongs to a passive suppression system. This system can effectively solve the pulsation problem when the surface shape error of the reflector is relatively large, that is, after passing through the passive damping system, the pulsation of the magnetorheological fluid is suppressed, and the surface shape error caused by the remaining pulsation acting on the reflector is smaller than the current surface shape error of the reflector, and the influence on the convergence of the current surface shape error of the reflector is relatively small and can be ignored. When the surface shape error of the reflector continuously converges to be close to the surface shape error caused by the pulsation, it will cause the surface shape error of the reflector to not converge effectively. In this processing stage, it is very necessary to effectively actively suppress the remaining magnetorheological fluid pulsations and reduce the amplitude. The most ideal situation is to reduce the pulsation amplitude of the magnetorheological fluid to 0. Summary of the Invention

[0004] In order to overcome the existing technical problems and effectively suppress the pulsation of the magnetorheological fluid, the present invention provides a magnetorheological fluid pulsation adjustment device and an adjustment method thereof.

[0005] To achieve the above object, the present invention adopts the following specific technical solutions:

[0006] In a first aspect of the present invention, a magnetorheological fluid pulsation adjustment device is provided, including: an electromagnetic induction coil module and a signal acquisition and processing unit; the electromagnetic induction coil module is arranged at the magnetorheological fluid ejection end of the magnetorheological fluid circulation system pipeline; the signal acquisition and processing unit communicates with the electromagnetic induction coil module through signal transmission.

[0007] The signal acquisition and processing unit is used to acquire the pulsation signal of the magnetorheological fluid in the magnetorheological fluid circulation system pipeline, convert the pulsation signal into an electrical signal, and transmit the electrical signal to the electromagnetic induction coil module.

[0008] The electromagnetic induction coil module is used to generate an alternating magnetic field according to the electrical signal to change the viscosity of the magnetorheological fluid, thereby suppressing the pulsation signal of the magnetorheological fluid in the magnetorheological fluid circulation system pipeline.

[0009] Preferably, it further includes: a first pressure sensor; the first pressure sensor is arranged at one end of the electromagnetic induction coil module away from the magnetorheological fluid ejection end;

[0010] The first pressure sensor is used to transmit an analog signal to the signal acquisition and processing unit.

[0011] Preferably, the signal acquisition and processing unit includes: a phase shift processing electronic module and a current amplification module; the phase shift processing electronic module is electrically connected to the current amplification module;

[0012] The phase shift processing electronic module is used to acquire the pulsation signal in the magnetorheological fluid circulation system pipeline by collecting the analog signal output by the first pressure sensor in the magnetorheological fluid circulation system pipeline, perform filtering processing on the pulsation signal, perform phase shift processing according to the frequency characteristics of the filtered pulsation signal, obtain a control signal and transmit the control signal to the current amplification module;

[0013] The current amplification module is used to perform filtering and amplification processing on the control signal transmitted by the phase shift processing electronic module, and directly load the filtered and amplified signal onto the electromagnetic induction coil module.

[0014] Preferably, it further includes: a magnetorheological fluid storage tank, a peristaltic pump, a nozzle, a recovery pump, a recovery box, and a polishing wheel; the magnetorheological fluid storage tank, the peristaltic pump, the nozzle, the recovery pump, and the recovery box are sequentially connected through pipelines to form a loop of the magnetorheological fluid circulation system; the nozzle and the polishing wheel in the magnetorheological fluid circulation system are symmetrically arranged at both ends of the pipeline respectively; the recovery box is arranged within a preset distance range from the polishing wheel, and the recovery pump is connected to the recovery box and the magnetorheological fluid storage tank through pipelines respectively.

[0015] Preferably, the coil in the electromagnetic induction coil module is wound around the pipeline between the first pressure sensor and the nozzle; the coil in the electromagnetic induction coil module is used to generate an alternating magnetic field under the drive of the current amplification module to change the viscosity of the magnetorheological fluid in the pipeline.

[0016] Preferably, it further includes: a pressure recheck sensor module; the pressure recheck sensor module is arranged on the pipeline between the electromagnetic induction coil module and the nozzle; the pressure recheck sensor module is provided with a second pressure sensor and a differential feedback circuit; the second pressure sensor is used to detect the pressure fluctuation of the magnetorheological fluid in the pipeline and transmit the pressure fluctuation signal to the differential feedback circuit; the differential feedback circuit is used to output a feedback signal to the phase shift processing electronic module according to the pressure fluctuation signal.

[0017] Preferably, it further includes: an adjustment device; the adjustment device is arranged on the current amplification module or the electromagnetic induction coil module; the adjustment device is used to adjust the current intensity applied to the electromagnetic induction coil module.

[0018] Preferably, it further includes: a human-machine interface; a human-machine interface is reserved at least at one of the electromagnetic induction coil module, the pressure recheck sensor module, and the current amplification module; the human-machine interface is used to receive artificial intervention instructions in real time.

[0019] The second aspect of the present invention also provides a method for regulating magnetorheological fluid pulsation, which is applied to the magnetorheological fluid pulsation regulating device provided in the first aspect of the present invention and is used to actively suppress the magnetorheological fluid pulsation in the magnetorheological fluid circulation system;

[0020] The method includes the following steps:

[0021] S1: The signal acquisition and processing unit acquires the magnetorheological fluid pulsation signal in the pipeline of the magnetorheological fluid circulation system, converts the pulsation signal into an electrical signal, and transmits the electrical signal to the electromagnetic induction coil module;

[0022] S2: The electromagnetic induction coil module generates an alternating magnetic field according to the electrical signal to change the viscosity of the magnetorheological fluid, thereby suppressing the magnetorheological fluid pulsation signal in the pipeline of the magnetorheological fluid circulation system.

[0023] Preferably, the magnetorheological fluid pulsation regulating device further includes a first pressure sensor;

[0024] Step S1 further includes: a first pressure sensor detects the pulsating pressure in the pipeline and transmits an analog signal to the signal acquisition and processing unit;

[0025] The phase-shifting processing electronic module acquires the analog signal output by the first pressure sensor in the pipeline of the magnetorheological fluid circulation system to obtain the pulsating signal in the pipeline of the magnetorheological fluid circulation system, filters the pulsating signal, performs phase-shifting processing according to the frequency characteristics of the filtered pulsating signal, obtains a control signal and transmits the control signal to the current amplification module;

[0026] The current amplification module performs filtering and amplification processing on the control signal transmitted by the phase-shifting processing electronic module and directly loads the filtered and amplified signal onto the electromagnetic induction coil module;

[0027] The electromagnetic induction coil module generates an alternating magnetic field under the drive of the current amplification module, changing the viscosity of the magnetorheological fluid in the pipeline.

[0028] Advantages of the present invention:

[0029] By collecting the pulsating signal in the magnetorheological fluid circulation system, converting the pulsating signal into an electrical signal and loading it onto the electromagnetic induction coil module, the electromagnetic induction coil generates an alternating magnetic field. At this time, the viscosity of the magnetorheological fluid flowing in the magnetorheological fluid circulation system will change, thereby actively suppressing the amplitude of the pulsation, and further improving the machining accuracy of the ultra-large diameter complex curved surface and obtaining an ideal machining effect. Description of the drawings

[0030] Figure 1 is a structural diagram of a magnetorheological fluid pulsation adjustment device of the present invention;

[0031] Figure 2 is a flowchart of a magnetorheological fluid pulsation adjustment method of the present invention.

[0032] Among them, the reference numerals are:

[0033] 1. Magnetorheological fluid storage tank; 2. Peristaltic pump; 3. First pressure sensor; 4. Electromagnetic induction coil module; 5. Pressure re-inspection sensor module; 6. Nozzle; 7. Signal acquisition and processing unit; 71. Phase-shifting processing electronic module; 72. Current amplification module; 8. Recovery pump; 9. Recovery box; 10. Polishing wheel. Specific embodiments

[0034] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and do not constitute a limitation to the present invention.

[0035] The following will provide a detailed description of a magnetorheological fluid pulsation adjustment device and its adjustment method provided by the present invention.

[0036] Figure 1 It is a structural diagram of a magnetorheological fluid pulsation adjustment device of the present invention.

[0037] As Figure 1 shown, the present invention provides a magnetorheological fluid pulsation adjustment device, including: an electromagnetic induction coil module 4 and a signal acquisition and processing unit 7; the electromagnetic induction coil module 4 is arranged at the magnetorheological fluid ejection end of the magnetorheological fluid circulation system pipeline; the signal acquisition and processing unit 7 communicates with the electromagnetic induction coil module 4 through signal transmission;

[0038] The signal acquisition and processing unit 7 is used to collect the magnetorheological fluid pulsation signal in the magnetorheological fluid circulation system pipeline, convert the pulsation signal into an electrical signal, and transmit the electrical signal to the electromagnetic induction coil module 4;

[0039] The electromagnetic induction coil module 4 is used to generate an alternating magnetic field according to the electrical signal to change the viscosity of the magnetorheological fluid, thereby suppressing the pulsation signal of the magnetorheological fluid in the magnetorheological fluid circulation system pipeline.

[0040] The working principle of the present invention is: an alternating magnetic field is generated through the electromagnetic induction coil, so that the viscosity of the magnetorheological fluid flowing in the magnetorheological fluid circulation system changes; when the magnetic induction intensity increases, the viscosity of the magnetorheological fluid increases accordingly, and when the viscosity increases, the flow velocity of the magnetorheological fluid also slows down accordingly, which can actively suppress the pulsation of the magnetorheological fluid in the magnetorheological fluid circulation system pipeline.

[0041] The magnetorheological fluid pulsation adjustment device provided by the present invention further includes: a first pressure sensor 3; the first pressure sensor 3 is arranged at one end of the electromagnetic induction coil module 4 away from the magnetorheological fluid ejection;

[0042] The first pressure sensor 3 is used to transmit an analog signal to the signal acquisition and processing unit 7.

[0043] The signal acquisition and processing unit 7 includes: a phase-shifting processing electronic module 71 and a current amplification module 72; the phase-shifting processing electronic module 71 and the current amplification module 72 are electrically connected;

[0044] The phase-shifting processing electronic module 71 is used to acquire the pulsation signal in the magnetorheological fluid circulation system pipeline by collecting the analog signal output by the first pressure sensor 3 in the magnetorheological fluid circulation system pipeline, filter the pulsation signal, perform phase-shifting processing according to the frequency characteristics of the filtered pulsation signal, obtain a control signal and transmit the control signal to the current amplification module 72;

[0045] The current amplification module 72 is used to filter and amplify the control signal transmitted by the phase-shifting processing electronic module 71, and directly load the filtered and amplified signal onto the electromagnetic induction coil module 4.

[0046] In an embodiment of the present invention, the analog signal output by the first pressure sensor 3 is input to the phase-shifting processing electronic module 71. In the phase-shifting processing electronic module 71, the output signal of the first pressure sensor 3 is filtered by the built-in processing hardware to extract effective low-frequency information and retain the frequency of the original data, and this information is phase-shifted.

[0047] In an embodiment of the present invention, the purpose of phase-shifting is to be able to match the phase of the pulsation of the magnetorheological fluid in the magnetorheological fluid circulation system pipeline subsequently, so as to achieve the purpose of active suppression.

[0048] In an embodiment of the present invention, the phase-shifting processing electronic module 71 uses a DSP or an FPGA.

[0049] The current amplification module 72 filters and amplifies the control signal output by the phase-shifting processing electronic module 71; the amplified signal is directly loaded onto the electromagnetic induction coil module 4.

[0050] In an embodiment of the present invention, the phase-shifting processing electronic module 71 outputs the phase-shifted signal to the current amplification module 72, filters and amplifies the signal to generate an alternating current signal with a specific amplitude and a specific phase for driving the electromagnetic induction coil module 4; finally, the processed signal is directly loaded onto the electromagnetic induction coil module 4.

[0051] The magnetorheological fluid circulation system includes: a magnetorheological fluid storage tank 1, a peristaltic pump 2, a nozzle 6, a recovery pump 8, a recovery box 9, and a polishing wheel 10; the magnetorheological fluid storage tank 1, the peristaltic pump 2, the nozzle 6, the recovery pump 8, and the recovery box 9 are sequentially connected through pipelines to form a loop of the magnetorheological fluid circulation system; the nozzle 6 and the polishing wheel 10 are symmetrically arranged at both ends of the pipeline respectively; the recovery box 9 is arranged within a preset distance range of the polishing wheel 10.

[0052] In an embodiment of the present invention, through the nozzle 6 and the polishing wheel 10 symmetrically arranged at both ends of the pipeline respectively, the ejected magnetorheological fluid can be collected into the recovery box 9 by the rotation of the polishing wheel 10. Under the action of the recovery pump 8, the magnetorheological fluid returns to the magnetorheological fluid storage tank 1 along the pipeline, enabling the magnetorheological fluid to be recycled.

[0053] In one embodiment of the present invention, before the operation of the magnetorheological fluid circulation system, the magnetorheological fluid is first injected into the magnetorheological fluid storage tank 1, and the magnetorheological fluid is pumped out by the magnetorheological fluid supply pump. Since the magnetorheological fluid supply pump uses a peristaltic pump 2, the pressure reading of the first pressure sensor 3 will show periodic fluctuations.

[0054] The phase-shifting processing electronic module 71 acquires the pulsation signal in the magnetorheological fluid circulation system pipeline by collecting the output signal of the first pressure sensor 3 in the magnetorheological fluid circulation system pipeline, filters the pulsation signal, performs phase-shifting processing according to the pulsation signal characteristics, and outputs a control signal.

[0055] In the present invention, the coils in the electromagnetic induction coil module 4 are arranged around the pipeline between the first pressure sensor 3 and the nozzle 6; under the drive of the current amplification module 72, an alternating magnetic field is generated to change the viscosity of the magnetorheological fluid in the pipeline.

[0056] In one embodiment of the present invention, after the electromagnetic induction coil module 4 is loaded with an electrical signal, an alternating electromagnetic field with the same frequency as the signal will be generated at the axis through the built-in electromagnetic coil, and this electromagnetic field directly acts on the magnetorheological fluid passing through the central part of the electromagnetic induction coil module 4. The viscosity of the magnetorheological fluid changes according to the change of the magnetic induction intensity in the alternating electromagnetic field of the electromagnetic induction coil module 4. When the current intensity loaded on the electromagnetic induction coil module 4 increases, the magnetic induction intensity of the generated electromagnetic field will also increase accordingly, so that the viscosity of the magnetorheological fluid in the action area will also increase. The thickened magnetorheological fluid passing through the central area of the electromagnetic induction coil module 4 will effectively block the flow rate of the magnetorheological fluid in the circulation pipeline, thereby achieving the effect of actively suppressing the pulsation of the magnetorheological fluid in the magnetorheological fluid circulation system pipeline.

[0057] The magnetorheological fluid pulsation adjustment device provided by the present invention further includes: a pressure recheck sensor module 5; the pressure recheck sensor module 5 is arranged on the pipeline between the electromagnetic induction coil module 4 and the nozzle 6; the pressure recheck sensor module 5 is provided with a second pressure sensor and a differential feedback circuit; the second pressure sensor detects the pressure fluctuation of the magnetorheological fluid in the pipeline and transmits the fluctuation signal to the differential feedback circuit; the differential feedback circuit outputs a feedback signal to the phase-shifting processing electronic module 71.

[0058] In one embodiment of the present invention, the second pressure sensor is used to sense the pressure fluctuation of the magnetorheological fluid in the pipeline and input the pressure fluctuation signal to the differential feedback circuit, and the differential feedback circuit outputs a feedback signal to the phase-shifting processing electronic module 71; the feedback signal is an analog signal, such as a current signal or a voltage signal; the phase-shifting processing electronic module 71 fine-tunes the control signal output by it according to the feedback signal of the differential feedback circuit, so as to change the alternating electromagnetic field of the electromagnetic induction coil module 4 and make the flow rate of the magnetorheological fluid in the rear pipeline more stable.

[0059] In an embodiment of the present invention, the control principle of the phase-shifting processing electronic module 71 for automatically performing phase-shifting processing is as follows: the phase difference is related to the spatial distance from the first pressure sensor 3 to the electromagnetic induction coil module 4, and is adjusted according to the output signal of the pressure re-inspection sensor module 5; when the output signal of the pressure re-inspection sensor module 5 presents an irregular frequency distribution, the current phase difference is finely adjusted; when the output signal of the pressure re-inspection sensor module 5 is consistent with the output signal period and phase of the first pressure sensor 3, the fine adjustment is stopped, and the current phase difference is maintained.

[0060] The magnetorheological fluid pulsation regulating device provided by the present invention further includes: an adjusting device; the adjusting device is arranged on the current amplification module 72 or the electromagnetic induction coil module 4; the adjusting device is used to adjust the current intensity applied to the electromagnetic induction coil module 4.

[0061] In an embodiment of the present invention, in order to further improve the suppression effect, an adjusting device can be arranged on the current amplification module 72 or the electromagnetic induction coil module 4; the adjusting device is used to finely adjust the current intensity applied to the electromagnetic induction coil module 4, so that the output amplitude of the pressure re-inspection sensor module 5 is reduced to an acceptable range.

[0062] The magnetorheological fluid pulsation regulating device provided by the present invention further includes: a human-machine interface; a human-machine interface is reserved at least at one of the electromagnetic induction coil module 4, the pressure re-inspection sensor module 5, and the current amplification module 72; the human-machine interface is used to receive artificial intervention instructions in real time.

[0063] In an embodiment of the present invention, before the device works, the logical relationship of the above modules is edited into a program and input into the register of the phase-shifting processing electronic module 71, so that the phase-shifting processing electronic module 71 can automatically execute the above logic in actual work, and receive artificial intervention in real time through the reserved human-machine interface to achieve the optimal suppression effect.

[0064] Figure 2 It is a flowchart of a magnetorheological fluid pulsation regulating method of the present invention.

[0065] As Figure 2 shown, the second aspect of the present invention further provides a magnetorheological fluid pulsation regulating method, which is applied to the above magnetorheological fluid pulsation regulating device and is used to actively suppress the magnetorheological fluid pulsation in the magnetorheological fluid circulation system; this method includes the following steps:

[0066] S1: The signal acquisition and processing unit 7 collects the magnetorheological fluid pulsation signal in the magnetorheological fluid circulation system pipeline, converts the pulsation signal into an electrical signal, and transmits the electrical signal to the electromagnetic induction coil module 4;

[0067] S2: The electromagnetic induction coil module 4 generates an alternating magnetic field according to the electrical signal to change the viscosity of the magnetorheological fluid, thereby suppressing the pulsating signal of the magnetorheological fluid in the pipeline of the magnetorheological fluid circulation system.

[0068] Step S1 further includes: a first pressure sensor 3; the first pressure sensor 3 detects the pulsating pressure in the pipeline of the magnetorheological fluid circulation system and transmits an analog signal to the signal acquisition and processing unit 7.

[0069] Step S1 further includes the following steps:

[0070] The phase-shifting processing electronic module 71 acquires the pulsating signal in the pipeline of the magnetorheological fluid circulation system by collecting the analog signal output by the first pressure sensor 3 in the pipeline of the magnetorheological fluid circulation system, performs filtering processing on the pulsating signal, performs phase-shifting processing according to the frequency characteristics of the filtered pulsating signal, obtains a control signal, and transmits the control signal to the current amplification module 72;

[0071] The current amplification module 72 performs filtering and amplification processing on the control signal transmitted by the phase-shifting processing electronic module 71, and directly loads the filtered and amplified signal onto the electromagnetic induction coil module 4;

[0072] The electromagnetic induction coil module 4 generates an alternating magnetic field under the drive of the current amplification module 72 to change the viscosity of the magnetorheological fluid in the pipeline of the magnetorheological fluid circulation system.

[0073] A pressure recheck sensor module 5 is provided on the pipeline between the electromagnetic induction coil module 4 and the nozzle 6; the pressure recheck sensor module 5 is provided with a second pressure sensor and a differential feedback circuit; the second pressure sensor is used to detect the pressure fluctuation of the magnetorheological fluid in the pipeline and transmit the pressure fluctuation signal to the differential feedback circuit; the differential feedback circuit is used to output a feedback signal to the phase-shifting processing electronic module 71 according to the pressure fluctuation signal.

[0074] In an embodiment of the present invention, since the phase difference value is related to the spatial distance from the first pressure sensor 3 to the electromagnetic induction coil module 4 and needs to be adjusted according to the output signal of the pressure recheck sensor module 5; so when the output signal of the pressure recheck sensor module 5 presents an irregular frequency distribution, the current phase difference value is finely adjusted; when the output signal of the pressure recheck sensor module 5 is consistent with the output signal of the first pressure sensor 3 in terms of period and phase, the fine adjustment is stopped and the current phase difference value is maintained. The phase-shifting processing electronic module 71 finely adjusts the control signal output by it according to the feedback signal of the differential feedback circuit, thereby changing the alternating electromagnetic field of the electromagnetic induction coil module 4 and making the flow rate of the magnetorheological fluid in the subsequent pipeline more stable.

[0075] In the description of this specification, the description referring to terms such as "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0076] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention.

[0077] The above specific implementation manners of the present invention do not constitute a limitation on the protection scope of the present invention. Any other corresponding changes and deformations made according to the technical concept of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A magnetorheological fluid pulsation regulating device, characterized in that, Including: An electromagnetic induction coil module and a signal acquisition and processing unit; the electromagnetic induction coil module is arranged at the magnetic rheological fluid ejection end of the magnetic rheological fluid circulation system pipeline; the signal acquisition and processing unit communicates with the electromagnetic induction coil module through signal transmission. The signal acquisition and processing unit is used to acquire the pulsation signal of the magnetic rheological fluid in the magnetic rheological fluid circulation system pipeline, convert the pulsation signal into an electrical signal, and transmit the electrical signal to the electromagnetic induction coil module. The electromagnetic induction coil module is used to generate an alternating magnetic field according to the electrical signal to change the viscosity of the magnetic rheological fluid, thereby actively suppressing the pulsation signal of the magnetic rheological fluid in the magnetic rheological fluid circulation system pipeline. It further includes: a first pressure sensor; the first pressure sensor is arranged at one end of the electromagnetic induction coil module away from the magnetic rheological fluid ejection end; the first pressure sensor is used to transmit an analog signal to the signal acquisition and processing unit. The signal acquisition and processing unit includes: a phase-shifting processing electronic module; the phase-shifting processing electronic module is used to acquire the analog signal output by the first pressure sensor in the magnetic rheological fluid circulation system pipeline to obtain the pulsation signal in the magnetic rheological fluid circulation system pipeline, perform filtering processing on the pulsation signal, and perform phase-shifting processing according to the frequency characteristics of the filtered pulsation signal to obtain a control signal, and the control signal is mutually matched with the phase of the magnetic rheological fluid pulsation in the magnetic rheological fluid circulation system pipeline. It further includes: a pressure recheck sensor module; the pressure recheck sensor module is arranged on the pipeline between the electromagnetic induction coil module and the magnetic rheological fluid ejection end; the pressure recheck sensor module is provided with a second pressure sensor and a differential feedback circuit; the second pressure sensor is used to detect the pressure fluctuation of the magnetic rheological fluid in the pipeline and transmit the pressure fluctuation signal to the differential feedback circuit; the differential feedback circuit is used to output a feedback signal to the phase-shifting processing electronic module according to the pressure fluctuation signal; the phase-shifting processing electronic module fine-tunes the control signal output by it according to the feedback signal of the differential feedback circuit, thereby changing the alternating electromagnetic field of the electromagnetic induction coil module and making the flow rate of the magnetic rheological fluid in the rear-end pipeline more stable.

2. The magnetorheological fluid pulsation regulating device according to claim 1, wherein The signal acquisition and processing unit further includes a current amplification module; the phase-shifting processing electronic module is electrically connected to the current amplification module. The phase-shifting processing electronic module transmits the control signal to the current amplification module. The current amplification module is used to perform filtering and amplification processing on the control signal transmitted by the phase-shifting processing electronic module and directly load the filtered and amplified signal onto the electromagnetic induction coil module.

3. The magnetorheological fluid pulsation regulating device according to claim 2, wherein, It further includes: A magnetic rheological fluid storage tank, a peristaltic pump, a nozzle, a recovery pump, a recovery box, and a polishing wheel. The magnetic rheological fluid storage tank, the peristaltic pump, the nozzle, the recovery pump, and the recovery box are sequentially connected through pipelines to form a loop of the magnetic rheological fluid circulation system; the nozzle and the polishing wheel in the magnetic rheological fluid circulation system are symmetrically arranged at both ends of the pipeline respectively; the recovery box is arranged within a preset distance range of the polishing wheel.

4. The magnetorheological fluid pulsation regulating device according to claim 3, characterized in that, The coil in the electromagnetic induction coil module is wound around the pipeline between the first pressure sensor and the nozzle. The coil in the electromagnetic induction coil module is used to generate an alternating magnetic field under the drive of the current amplification module, so as to change the viscosity of the magnetorheological fluid in the pipeline.

5. The magnetorheological fluid pulsation regulating device according to claim 2, wherein, It further includes: an adjustment device; the adjustment device is arranged on the current amplification module or the electromagnetic induction coil module; the adjustment device is used to adjust the current intensity applied to the electromagnetic induction coil module.

6. The magnetorheological fluid pulsation regulating device according to claim 2, wherein, It further includes: a human-machine interface; The human-machine interface is reserved at least at one of the current amplification module, the electromagnetic induction coil module and the pressure re-inspection sensor module. The human-machine interface is used to receive manual intervention instructions in real time.

7. A method for pulsating regulation of magnetorheological fluid, characterized in that, The method is applied to the magnetorheological fluid pulsation regulating device according to any one of claims 2 to 6, and is used to actively suppress the magnetorheological fluid pulsation in the magnetorheological fluid circulation system; the method includes the following steps: S1: The signal acquisition and processing unit acquires the magnetorheological fluid pulsation signal in the pipeline of the magnetorheological fluid circulation system, converts the pulsation signal into an electrical signal, and transmits the electrical signal to the electromagnetic induction coil module; S2: The electromagnetic induction coil module generates an alternating magnetic field according to the electrical signal to change the viscosity of the magnetorheological fluid, thereby suppressing the magnetorheological fluid pulsation signal in the pipeline of the magnetorheological fluid circulation system; The magnetorheological fluid pulsation regulating device further includes a first pressure sensor; Step S1 further includes: The first pressure sensor detects the pulsating pressure in the pipeline and transmits an analog signal to the signal acquisition and processing unit; The phase-shifting processing electronic module acquires the pulsation signal in the pipeline of the magnetorheological fluid circulation system by collecting the analog signal output by the first pressure sensor in the pipeline of the magnetorheological fluid circulation system, filters the pulsation signal, performs phase-shifting processing according to the frequency characteristics of the filtered pulsation signal, obtains a control signal and transmits the control signal to the current amplification module; The current amplification module performs filtering and amplification processing on the control signal transmitted by the phase-shifting processing electronic module, and directly loads the filtered and amplified signal onto the electromagnetic induction coil module; The electromagnetic induction coil module generates an alternating magnetic field under the drive of the current amplification module to change the viscosity of the magnetorheological fluid in the pipeline.

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