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Magnetic fluid control device

A control device, a magnetic fluid technology, applied in the direction of program control, computer control, general control system, etc., can solve the problems of poor fluency and variability, and achieve the effects of easy acquisition, simple circuit structure and low cost

Inactive Publication Date: 2018-05-29
HANGZHOU DIANZI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are very few technologies and solutions for the control of magnetic fluid in the existing technology, which are almost blank. The only ones are composed of mechanical structures and permanent magnets. Fine Arts and Crafts and Ornament Requests

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0051] see Figure 5 , taking the electromagnet array composed of nine electromagnets as an example, each electromagnet is initially driven by 50% PWM wave. Since the switching time of each electromagnet is the same at this time, the suction force produced is the same, and the magnetic fluid above the electromagnet square array is located at the center of the vessel and is in a static state.

[0052] At this time, if electromagnets 1, 4, and 7 are driven by 65% ​​PWM waves, the rest of the electromagnets still maintain 50% PWM wave driving, because the high level time supplied by electromagnets 1, 4, and 7 is longer than other electromagnets. Therefore, the time of the attractive force generated is longer than that of other electromagnets, so the attractive force within this time difference will cause the magnetic fluid to move slowly to the left.

[0053] At this time, if the electromagnets 1, 2, and 3 are driven by 65% ​​PWM waves, the rest of the electromagnets still maint...

Embodiment 2

[0058] see Figure 6 , shows the functional block diagram of Embodiment 2. The PWM waves with different duty ratios in Embodiment 1 are replaced by more common audio signals, so that the magnetic fluid product can move dynamically according to the rhythm of the music. The input audio signal is sampled by the ADC, and then converted into PWM waves with different duty ratios by the MCU according to the amplitude of the audio signal and output to the data selector through the IO port. The MCU generates the selection control bit signal of the corresponding data selector through the amplitude of the input audio, thereby selecting the PWM wave to drive the electromagnet and controlling the movement speed of the magnetic fluid. At the same time, the MCU selects which electromagnet switches in the electromagnet lattice according to the frequency of the input audio signal, so as to control the moving direction of the magnetic fluid. That is, the amplitude of the audio signal correspon...

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Abstract

The invention discloses a magnetic fluid control device. The device includes at least a driving unit and an electromagnet array. A control module is arranged in the driving unit and is used for generating a driving signal according to an operation program to control the state of each electromagnet in the electromagnet array. The electromagnet array is formed by multiple single electromagnets and is used for changing the states of corresponding electromagnets according to the driving signal to change spatial magnetic field distribution to control a magnetic fluid to exhibit a corresponding spatial distribution. Compared with the prior art, by using the electromagnet array, the control of the behavior of the magnetic fluid can be easily realized by using the electromagnet array, at the sametime, a circuit structure used in the present invention is simple, required circuit components are relatively easy to obtain, and the cost is low.

Description

technical field [0001] The invention belongs to the technical field of magnetic fluid control, and in particular relates to a magnetic fluid control device. Background technique [0002] Nowadays, with the rapid development of nanomaterial science, the application of nanoscale magnetic materials is becoming more and more extensive. Among them, the magnetic fluid represented by Fe3O4 nanoparticles is widely used in the industrial field. It has both the fluidity of liquid and the magnetism of solid magnetic materials. A stable colloidal liquid composed of a base carrier liquid (also called a medium) and a surfactant. The fluid has no magnetic attraction when it is static, and it shows magnetism when an external magnetic field is applied. Because of this, it has a wide range of applications in practice and has high academic value in theory. The magnetic fluid produced with nano-metal and alloy powder has excellent performance, and can be widely used in various harsh condition...

Claims

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Application Information

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IPC IPC(8): G05B19/042
CPCG05B19/0423
Inventor 刘国华张志维程知群张煜心林晨陈佳宇李素东
Owner HANGZHOU DIANZI UNIV