Rotary control equipment of microscopic particle chain and circuit thereof

Abstract

The utility model provides rotation control equipment of a microscopic particle chain and a circuit of the rotation control equipment, and relates to the technical field of dielectrophoresis. The rotation control circuit comprises a main control chip and a communication module which are electrically connected, the main control chip is electrically connected to a digital-to-analog conversion module, the digital-to-analog conversion module is electrically connected to a signal processing module, the signal processing module is electrically connected to a switch module, and the switch module is electrically connected to an I TO electrode module. The switch module is electrically connected to the main control chip. The I TO electrode module comprises a first electrode pair which is oppositely arranged along a first direction and a second electrode pair which is oppositely arranged along a second direction. The first direction is perpendicular to the second direction. The first electrode pair can generate a first non-uniform electric field in the forward direction or the reverse direction of the first direction, and the first non-uniform electric field can be gradually increased or decreased along with the driving signal. The second electrode pair can generate a second non-uniform electric field towards the positive direction or the negative direction of the second direction, and the second non-uniform electric field can be gradually increased or decreased along with the driving signal.

Description

Technical Field

[0001] The utility model relates to the technical field of dielectrophoresis, in particular to a rotation control device of a microscopic particle chain and a circuit thereof. Background Art

[0002] This patent involves the Dielectrophoresis (DEP) technology, which describes the movement of neutral particles due to dielectric polarization in a non-uniform electric field. The dipole moment on the particle is composed of two charges with the same charge but opposite polarity. When these charges are asymmetrically distributed on the particle interface, a macroscopic dipole moment is formed. DEP technology has broad application prospects in the fields of biology, medicine, and pharmaceuticals.

[0003] The study of the rotation of micro-nanoparticle chains is crucial for the development of biomedical engineering, especially in the fields of biosensors and cell injection. Currently, the rotation of single particles has been widely studied, and droplet control based on electric field operation has also been achieved. However, although the rotation manipulation of microscopic particle chains has been studied, these studies have various defects.

[0004] At present, the control methods for particle chains include acoustic field, magnetic field, light field and electric field. Each method has its limitations. Magnetic field control: The particles themselves are required to contain magnetic substances, and the magnetic field equipment is bulky, which is not suitable for miniaturized and integrated applications. Acoustic field control: It is usually suitable for suspended particles in solution, but it has poor control effect on particles that sink to the bottom, and the cost of acoustic control equipment is relatively high. Light field control: It is greatly affected by the environment, and an overly strong light field may cause damage to the controlled particles.

[0005] In contrast, electric field control realizes particle chaining through electric field polarization, has no special requirements for the controlled particles, and is conducive to miniaturization and cost control. The traditional method of electric field controlling the rotation of particle chains involves applying alternating signals to rotating microelectrodes to generate electric fields and polarize particles into chains. At the same time, the alternating signals applied to each electrode need to have a fixed phase difference, which usually requires multiple signal sources or additional phase shifting circuits to achieve. Using multiple signal sources to control the rotating electric field is not only costly, but also has poor controllability. In addition, to achieve a specific angle of rotation, the control difficulty is also quite large.

[0006] In view of this, the applicant filed this application after studying the existing technology. Utility Model Content

[0007] The utility model provides a rotation control device for a microscopic particle chain and a circuit thereof, so as to improve at least one of the above technical problems.

[0008] In the first aspect, the embodiment of the utility model provides a rotation control circuit of a microscopic particle chain, which includes a main control module integrated with a main control chip and a communication module, a digital-to-analog conversion module electrically connected to the signal output end of the main control chip, a signal processing module electrically connected to the output end of the digital-to-analog conversion module, a switch module electrically connected to the output end of the signal processing module, and an ITO electrode module electrically connected to the output end of the switch module. The communication module is electrically connected to the main control chip, and the communication module is configured to communicate with an external device. The control end of the switch module is electrically connected to the main control chip.

[0009] The ITO electrode module comprises a first electrode pair disposed opposite to each other along a first direction and a second electrode pair disposed opposite to each other along a second direction. The first direction is perpendicular to the second direction.

[0010] The first electrode pair is configured to generate a first non-uniform electric field in a positive direction or a reverse direction of the first direction, and the first non-uniform electric field can gradually increase or decrease with a driving signal. The second electrode pair is configured to generate a second non-uniform electric field in a positive direction or a reverse direction of the second direction, and the second non-uniform electric field can gradually increase or decrease with a driving signal. The first non-uniform electric field can be superimposed on the second non-uniform electric field, and the length direction of the microscopic particle chain can be oriented toward the direction of the electric field.

[0011] In an optional embodiment, the control end of the switch module is electrically connected to the I / O control signal output interface of the main control chip to receive an I / O control signal of a corresponding timing. The switch module is configured to perform a switch action according to the control signal.

[0012] In an optional embodiment, the X component input terminal of the signal processing module is electrically connected to the output terminal of the digital-to-analog conversion module to receive the DC analog signal output by the digital-to-analog conversion module. The Y component input terminal of the signal processing module is configured to input an external AC signal. The signal processing module is configured to generate a drive signal according to the DC analog signal and the AC signal.

[0013] In an optional embodiment, the digital-to-analog conversion module includes a first digital-to-analog conversion module and a second digital-to-analog conversion module. The signal processing module includes a first signal processing module and a second signal processing module. The rotation control circuit includes two switch modules, the two switch modules are respectively a first switch module and a second switch module. The first electrode pair includes a first electrode and a second electrode. The second electrode pair includes a third electrode and a fourth electrode.

[0014] The first digital-to-analog conversion module is electrically connected to the first PWM signal output port of the main control chip. The X component input end of the first signal processing module is electrically connected to the output end of the digital-to-analog conversion module. The first switch module is electrically connected to the output end of the first signal processing module. The power input ends of the first electrode and the third electrode are electrically connected to the output end of the first switch module respectively.

[0015] The second digital-to-analog conversion module is electrically connected to the second PWM signal output port of the main control chip. The X component input end of the second signal processing module is electrically connected to the output end of the digital-to-analog conversion module. The second switch module is electrically connected to the output end of the second signal processing module. The power input ends of the second electrode and the fourth electrode are electrically connected to the output end of the second switch module respectively.

[0016] In an optional embodiment, the first signal processing module includes a first signal processing module, a second signal processing module, a third signal processing module and a fourth signal processing module. The second signal processing module includes a fifth signal processing module, a sixth signal processing module, a seventh signal processing module and an eighth signal processing module.

[0017] The first switch module includes a first switch, a fifth switch, a second switch and a sixth switch. The second switch module includes a third switch, a seventh switch, a fourth switch and an eighth switch.

[0018] The input end of the first electrode is electrically connected to the output ends of the first switch and the second switch. The input end of the first switch is electrically connected to the output end of the first signal processing module. The input end of the second switch is electrically connected to the output end of the third signal processing module.

[0019] The input end of the second electrode is electrically connected to the output ends of the third switch and the fourth switch. The input end of the third switch is electrically connected to the output end of the fifth signal processing module. The input end of the fourth switch is electrically connected to the output end of the seventh signal processing module.

[0020] The input end of the third electrode is electrically connected to the output ends of the fifth switch and the sixth switch. The input end of the fifth switch is electrically connected to the output end of the second signal processing module. The input end of the sixth switch is electrically connected to the output end of the fourth signal processing module.

[0021] The input end of the fourth electrode is electrically connected to the output ends of the seventh switch and the eighth switch. The input end of the seventh switch is electrically connected to the output end of the sixth signal processing module. The input end of the eighth switch is electrically connected to the output end of the eighth signal processing module.

[0022] The amplitude changes of the external alternating current signals input to the Y component input terminals of the first signal processing module and the third signal processing module are the same, and the phases are opposite. The amplitude changes of the external alternating current signals input to the Y component input terminals of the first signal processing module, the second signal processing module, the fifth signal processing module, and the sixth signal processing module are the same, and the phases are the same. The amplitude changes of the external alternating current signals input to the Y component input terminals of the third signal processing module, the fourth signal processing module, the seventh signal processing module, and the eighth signal processing module are the same, and the phases are the same.

[0023] In an optional embodiment, the ITO electrode module further includes a glass substrate. The first electrode, the second electrode, the third electrode and the fourth electrode are all bonded to the glass substrate. The end of the electrode is a trapezoidal structure, and the width of the electrode end is 170 μm. The electrode material is ITO, and the thickness is 200 nm. The distance between the first electrode and the second electrode is 320 μm. The distance between the third electrode and the fourth electrode is 320 μm.

[0024] In an optional embodiment, the model of the communication module is CH340C, the model of the main control module is STM32F407ZGT6, the model of the digital-to-analog conversion module is GP8101 S, and the model of the signal processing module is AD633.

[0025] In an optional embodiment, the rotation control circuit further comprises a knob module electrically connected to the main control chip. The knob module is an eight-position knob switch. The eight pins of the eight-position knob switch are electrically connected to an I / O port of the main control chip respectively.

[0026] In a second aspect, an embodiment of the utility model provides a rotation control device for a microscopic particle chain, which comprises a rotation control circuit for a microscopic particle chain as described in any paragraph of the first aspect.

[0027] By adopting the above technical solution, the utility model can achieve the following technical effects:

[0028] A rotation control circuit of a microscopic particle chain in an embodiment of the utility model realizes the rotation of the particle chain under the condition of a limited number of signal sources, and realizes non-uniform rotation angle control by controlling the signal amplitude of the access electrode and the on-off of the switch, thereby realizing the rotation of the microscopic particle chain. In addition, the circuit introduces a knob control scheme, and the angle control of the particle chain can also be realized by changing the rotation angle of the knob. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0030] Figure 1 It is the first circuit diagram of a rotation control circuit of a microscopic particle chain.

[0031] Figure 2 It is a second circuit diagram of a rotation control circuit of a microscopic particle chain.

[0032] Figure 3 This is a top view of the I TO electrode module.

[0033] Figure 4 This is a half-section view of the I TO electrode module.

[0034] Figure 5 It is a timing diagram of the circuit control signal that controls the rotation of the microscopic particle chain.

[0035] Figure 6 It is a schematic diagram of the generation of a rotating electric field in the process of controlling the rotation of a microscopic particle chain.

[0036] Figure 7 It is the electrical connection diagram between the circuit knob switch and the main control chip.

[0037] Numbers in the figure: 1-glass substrate. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0039] Example 1, please refer to Figures 1 to 7 The first embodiment of the utility model provides a rotation control circuit of a microscopic particle chain, which includes a main control module integrated with a communication module and a main control chip, a digital-to-analog conversion module electrically connected to the signal output end of the main control chip, a signal processing module electrically connected to the output end of the digital-to-analog conversion module, a switch module electrically connected to the output end of the signal processing module, and an ITO electrode module electrically connected to the output end of the switch module.

[0040] The communication module is electrically connected to the main control chip, and the communication module is configured to communicate with an external device. Preferably, the communication module is CH340C, which is used to convert USB to TTL. The main control module is STM32F407ZGT6, which is used to output PWM signals and I / O control signals.

[0041] Preferably, the X component input terminal of the signal processing module is electrically connected to the output terminal of the digital-to-analog conversion module to receive the DC analog signal output by the digital-to-analog conversion module. The Y component input terminal of the signal processing module is configured to input an external AC signal. The signal processing module is configured to generate a driving signal according to the DC analog signal and the AC signal.

[0042] The control end of the switch module is electrically connected to the main control chip. Preferably, the control end of the switch module is electrically connected to the I / O control signal output interface of the main control chip to receive the I / O control signal of the corresponding timing. The switch module is constructed to be able to perform a switch action according to the control signal.

[0043] The ITO electrode module includes a first electrode pair arranged opposite to each other along a first direction and a second electrode pair arranged opposite to each other along a second direction. The first direction is perpendicular to the second direction. The first electrode pair is configured to generate a first non-uniform electric field in the positive direction or the reverse direction of the first direction, and the first non-uniform electric field can gradually increase or decrease with the driving signal. The second electrode pair is configured to generate a second non-uniform electric field in the positive direction or the reverse direction of the second direction, and the second non-uniform electric field can gradually increase or decrease with the driving signal. The first non-uniform electric field can be superimposed on the second non-uniform electric field, and the length direction of the microscopic particle chain can be oriented in the direction of the electric field, so that when the electric field changes, it moves with the electric field to drive the microscopic particle chain to rotate.

[0044] The main control module is also integrated with a power conversion module. The power conversion module is electrically connected to the power input terminal of the main control chip and is configured to adjust the external input voltage to supply power to the main control chip. Preferably, the conversion chip used in the power conversion module is AMS1117-3.3V. The main control module integrates a USB-TTL conversion module and a power conversion module, which are used for communication and voltage conversion, respectively. The power supply and signal source input of all the above modules are provided by an external power supply and a signal source.

[0045] A rotation control circuit of a microscopic particle chain in an embodiment of the utility model realizes the rotation of the particle chain under the condition of a limited number of signal sources, and realizes non-uniform rotation angle control by controlling the signal amplitude of the access electrode and the on-off of the switch, thereby realizing the rotation of the microscopic particle chain.

[0046] On the basis of the above embodiments, in an optional embodiment of the utility model, the digital-to-analog conversion module includes a first digital-to-analog conversion module and a second digital-to-analog conversion module. The signal processing module includes a first signal processing module and a second signal processing module. The rotation control circuit includes two switch modules, which are respectively a first switch module and a second switch module. Preferably, the chip used in the digital-to-analog conversion module is GP8101S, which is used to convert the PWM signal output by the controller into a 0-10V DC analog signal proportional to the duty cycle.

[0047] like Figure 3 and Figure 4 As shown, the first electrode pair includes a first electrode and a second electrode. The second electrode pair includes a third electrode and a fourth electrode. Preferably, the ITO electrode module also includes a glass substrate 1. The first electrode, the second electrode, the third electrode and the fourth electrode are all bonded to the glass substrate 1. The end of the electrode is a trapezoidal structure, and the width of the electrode end is 170μm. The thickness is 200nm. The distance between the first electrode and the second electrode is 320μm. The distance between the third electrode and the fourth electrode is 320μm.

[0048] Specifically, the material of the electrode is ITO, that is, a conductive material composed of indium oxide and tin oxide. The electrode is specifically an ITO electrode glass chip. The ITO electrode module and the switch module are electrically connected through conductive silver paste and enameled wire, as well as a pin header.

[0049] The first digital-to-analog conversion module is electrically connected to the first PWM signal output port of the main control chip. The X component input end of the first signal processing module is electrically connected to the output end of the digital-to-analog conversion module. The first switch module is electrically connected to the output end of the first signal processing module. The power input ends of the first electrode and the third electrode are electrically connected to the output end of the first switch module respectively.

[0050] The second digital-to-analog conversion module is electrically connected to the second PWM signal output port of the main control chip. The X component input end of the second signal processing module is electrically connected to the output end of the digital-to-analog conversion module. The second switch module is electrically connected to the output end of the second signal processing module. The power input ends of the second electrode and the fourth electrode are electrically connected to the output end of the second switch module respectively.

[0051] On the basis of the above embodiments, in an optional embodiment of the utility model, the first signal processing module includes a first signal processing module, a second signal processing module, a third signal processing module and a fourth signal processing module. The second signal processing module includes a fifth signal processing module, a sixth signal processing module, a seventh signal processing module and an eighth signal processing module. Preferably, the chip used in the signal processing module is AD633, which is used to convert the DC signal of the digital-to-analog conversion and the externally connected AC signal into a drive signal with controllable amplitude.

[0052] The first switch module includes a first switch, a fifth switch, a second switch and a sixth switch. The second switch module includes a third switch, a seventh switch, a fourth switch and an eighth switch. Preferably, the core components used in the switch include a JQC-3FF-005-SZ relay and an S9012 transistor, which realize the switching of the transistor by receiving an I / O level signal sent by the main control chip, thereby controlling the on and off of the relay and realizing the turning on and off of the signal.

[0053] The input end of the first electrode is electrically connected to the output ends of the first switch and the second switch. The input end of the first switch is electrically connected to the output end of the first signal processing module. The input end of the second switch is electrically connected to the output end of the third signal processing module.

[0054] The input end of the second electrode is electrically connected to the output ends of the third switch and the fourth switch. The input end of the third switch is electrically connected to the output end of the fifth signal processing module. The input end of the fourth switch is electrically connected to the output end of the seventh signal processing module.

[0055] The input end of the third electrode is electrically connected to the output ends of the fifth switch and the sixth switch. The input end of the fifth switch is electrically connected to the output end of the second signal processing module. The input end of the sixth switch is electrically connected to the output end of the fourth signal processing module.

[0056] The input end of the fourth electrode is electrically connected to the output ends of the seventh switch and the eighth switch. The input end of the seventh switch is electrically connected to the output end of the sixth signal processing module. The input end of the eighth switch is electrically connected to the output end of the eighth signal processing module.

[0057] The amplitude changes of the external alternating current signals input to the Y component input terminals of the first signal processing module and the third signal processing module are the same, and the phases are opposite. The amplitude changes of the external alternating current signals input to the Y component input terminals of the first signal processing module, the second signal processing module, the fifth signal processing module, and the sixth signal processing module are the same, and the phases are the same. The amplitude changes of the external alternating current signals input to the Y component input terminals of the third signal processing module, the fourth signal processing module, the seventh signal processing module, and the eighth signal processing module are the same, and the phases are the same.

[0058] The rotation control circuit of the microscopic particle chain of the utility model embodiment, when the signal source is limited, controls the AC drive signal amplitude and phase difference of each electrode inside the ITO electrode chip through outputting a control signal of a certain timing, undergoing digital-to-analog conversion, signal processing, and switch execution module, thereby realizing the rotation of the electric field inside the electrode chip. The controllability is greatly improved, and the volume and power consumption are also reduced. The technical problem of poor control ability of the particle chain when the signal source is limited is solved. And the defects of high energy consumption and high cost in the process of controlling the rotation of the microscopic particle chain by other physical fields are solved.

[0059] Based on the above embodiment, in an optional embodiment of the utility model, the rotation control circuit further includes a knob module electrically connected to the main control chip. The knob module is an eight-position knob switch. The eight pins of the eight-position knob switch are respectively electrically connected to an I / O port of the main control chip, such as Figure 7 shown.

[0060] Specifically, the circuit introduces a knob control scheme, and by changing the rotation angle of the knob, the angle control of the particle chain can be achieved. The circuit realizes the switching between computer control and manual control modes. Compared with other physical field drives, the power consumption and cost are greatly reduced, and the accuracy and controllability of micro-nano particle rotation are improved.

[0061] Taking the PNP switch as an example, the PNP switch is turned on in the low level state, and the main control chip outputs the 8 gears of the knob module respectively. Figure 5 Different control signals in the gear position generate electric fields such as Figure 6 Outputting eight kinds of electric fields in sequence can drive the particle chain to rotate.

[0062] In this embodiment, the host computer selects the computer control mode or the manual control mode (ie, knob control) by sending a serial port instruction to the main control chip.

[0063] like Figure 1 As shown in the figure, after receiving the command from the PC, the main control module generates an I / O signal with corresponding timing and sends it to the switch execution module to control the opening and closing of the relay. At the same time, two PWM signals with different duty cycles are generated and sent to the digital-to-analog conversion module GP8101S. The duty cycle signal is converted into a DC analog signal as one of the component inputs of the signal processing module AD633. At the same time, the external signal source is used as another component input of the signal processing module to generate a drive signal with controllable amplitude. The signal finally output to the electrode is also determined by the control timing of the main control module.

[0064] Specifically, Figure 2As shown in the figure, when the PC sends an instruction, the MCU generates two corresponding PWM signals. According to the requirements of the subsequent rotating electric field, two PWM signals are set here. The signal amplitude and frequency of the two signals are the same, but the duty cycle changes of the two are not synchronized, that is, the duty cycle of PWM1 increases first, then decreases, and then increases again, and the duty cycle of PWM2 decreases first, then increases, and then decreases, and so on, and changes periodically.

[0065] According to the size of the duty cycle, a DC signal between 0 and 10V is finally output. The larger the duty cycle, the larger the DC signal. The DC signal is used as the X component input of the signal processing module AD633, and the AC signal is used as the Y component input. After processing, a driving signal with an amplitude that can be controlled by the main controller is finally obtained.

[0066] Considering the final control effect, the embodiment of the utility model adopts a solution of eight switches driving four electrodes, such as Figure 2 As shown: the first switch and the second switch control the first electrode. The third switch and the fourth switch drive the second electrode. The fifth switch and the sixth switch drive the third electrode. The seventh switch and the eighth switch drive the fourth electrode. The signals driving the same electrode have the same amplitude change but opposite phases. When controlling, of the two switches driving the same electrode, at most only one switch can be turned on. This wiring method allows the amplitudes of the first to fourth switch driving signals to change synchronously, and the amplitudes of the fifth to eighth switch driving signals to change synchronously.

[0067] Embodiment 2: The embodiment of the present utility model provides a rotation control device for a microscopic particle chain, which comprises a rotation control circuit for a microscopic particle chain as described in any section of Embodiment 1.

[0068] In several embodiments provided by the embodiments of the present utility model, it should be understood that the disclosed apparatus and method can also be implemented in other ways. The apparatus and method embodiments described above are merely schematic. For example, the flowcharts and block diagrams in the accompanying drawings show the possible architecture, functions and operations of the apparatus, method and computer program product according to multiple embodiments of the present utility model. In this regard, each box in the flowchart or block diagram can represent a module, a program segment or a part of a code, and the module, program segment or a part of the code contains one or more executable instructions for implementing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the box can also occur in a different order from the order marked in the accompanying drawings. For example, two consecutive boxes can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each box in the block diagram and / or flowchart, and the combination of boxes in the block diagram and / or flowchart can be implemented with a dedicated hardware-based system that performs a specified function or action, or can be implemented with a combination of dedicated hardware and computer instructions.

[0069] In addition, the functional modules in the various embodiments of the present invention may be integrated together to form an independent part, or each module may exist independently, or two or more modules may be integrated to form an independent part.

[0070] If the function is implemented in the form of a software function module and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on such an understanding, the technical solution of the utility model can be embodied in the form of a software product in essence or in other words, the part that contributes to the prior art or the part of the technical solution. The computer software product is stored in a storage medium, including several instructions to enable a computer device (which can be a personal computer, an electronic device, or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the utility model. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-On l yMemory), random access memory (RAM, Random Access Memory), disk or optical disk and other media that can store program code. It should be noted that in this article, the term "include", "include" or any other variant thereof is intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements includes not only those elements, but also includes other elements that are not explicitly listed, or also includes elements inherent to such process, method, article or device. Without more constraints, an element defined by the phrase "comprising a..." does not exclude the existence of other identical elements in the process, method, article or apparatus comprising the element.

[0071] The terms used in the embodiments of the present invention are only for the purpose of describing specific embodiments, and are not intended to limit the present invention. The singular forms "a", "said" and "the" used in the embodiments of the present invention and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings.

[0072] It should be understood that the term "and / or" used in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0073] The word "if" as used herein may be interpreted as "at the time of" or "when" or "in response to determining" or "in response to detecting", depending on the context. Similarly, the phrases "if it is determined" or "if (stated condition or event) is detected" may be interpreted as "when it is determined" or "in response to determining" or "when detecting (stated condition or event)" or "in response to detecting (stated condition or event)", depending on the context.

[0074] The "first\second" mentioned in the embodiments is only to distinguish similar objects, and does not represent a specific order for the objects. It is understandable that the "first\second" can be interchanged with the specific order or sequence where permitted. It should be understood that the objects distinguished by "first\second" can be interchanged where appropriate, so that the embodiments described herein can be implemented in an order other than those illustrated or described herein.

[0075] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A rotation control circuit for a microscopic particle chain, characterized in that: The invention comprises a main control module integrated with a main control chip and a communication module, a digital-to-analog conversion module electrically connected to a signal output terminal of the main control chip, a signal processing module electrically connected to an output terminal of the digital-to-analog conversion module, a switch module electrically connected to an output terminal of the signal processing module, and an ITO electrode module electrically connected to an output terminal of the switch module; the communication module is electrically connected to the main control chip, and the communication module is configured to communicate with an external device; a control terminal of the switch module is electrically connected to the main control chip; The ITO electrode module comprises a first electrode pair disposed opposite to each other along a first direction and a second electrode pair disposed opposite to each other along a second direction; the first direction is perpendicular to the second direction; The first electrode pair is constructed to generate a first non-uniform electric field in a positive direction or a reverse direction of the first direction, and the first non-uniform electric field can gradually increase or decrease with the driving signal; the second electrode pair is constructed to generate a second non-uniform electric field in a positive direction or a reverse direction of the second direction, and the second non-uniform electric field can gradually increase or decrease with the driving signal; the first non-uniform electric field can be superimposed on the second non-uniform electric field, and the length direction of the microscopic particle chain can be toward the direction of the electric field.

2. A rotation control circuit for a microscopic particle chain according to claim 1, characterized in that: The control end of the switch module is electrically connected to the I / O control signal output interface of the main control chip to receive an I / O control signal of a corresponding timing; the switch module is constructed to be able to perform a switching action according to the control signal.

3. The rotation control circuit of a microscopic particle chain according to claim 1, characterized in that: The X component input terminal of the signal processing module is electrically connected to the output terminal of the digital-to-analog conversion module to receive the DC analog signal output by the digital-to-analog conversion module; the Y component input terminal of the signal processing module is configured to input an external AC signal; The signal processing module is configured to generate a driving signal according to the DC analog signal and the AC signal.

4. The rotation control circuit of a microscopic particle chain according to claim 1, characterized in that: The digital-to-analog conversion module includes a first digital-to-analog conversion module and a second digital-to-analog conversion module; the signal processing module includes a first signal processing module and a second signal processing module; the rotation control circuit includes two switch modules, the two switch modules are a first switch module and a second switch module respectively; the first electrode pair includes a first electrode and a second electrode; the second electrode pair includes a third electrode and a fourth electrode; The first digital-to-analog conversion module is electrically connected to the first PWM signal output port of the main control chip; the X component input end of the first signal processing module is electrically connected to the output end of the digital-to-analog conversion module; the first switch module is electrically connected to the output end of the first signal processing module; the power input ends of the first electrode and the third electrode are electrically connected to the output end of the first switch module respectively; The second digital-to-analog conversion module is electrically connected to the second PWM signal output port of the main control chip; the X-component input end of the second signal processing module is electrically connected to the output end of the digital-to-analog conversion module; the second switch module is electrically connected to the output end of the second signal processing module; and the power input ends of the second electrode and the fourth electrode are electrically connected to the output end of the second switch module respectively.

5. A rotation control circuit for a microscopic particle chain according to claim 4, characterized in that: The first signal processing module includes a first signal processing module, a second signal processing module, a third signal processing module and a fourth signal processing module; the second signal processing module includes a fifth signal processing module, a sixth signal processing module, a seventh signal processing module and an eighth signal processing module; The first switch module includes a first switch, a fifth switch, a second switch and a sixth switch; the second switch module includes a third switch, a seventh switch, a fourth switch and an eighth switch; The input end of the first electrode is electrically connected to the output ends of the first switch and the second switch; the input end of the first switch is electrically connected to the output end of the first signal processing module; The input end of the second switch is electrically connected to the output end of the third signal processing module; An input end of the second electrode is electrically connected to output ends of the third switch and the fourth switch; The input end of the third switch is electrically connected to the output end of the fifth signal processing module; the input end of the fourth switch is electrically connected to the output end of the seventh signal processing module; An input end of the third electrode is electrically connected to output ends of the fifth switch and the sixth switch; An input end of the fifth switch is electrically connected to an output end of the second signal processing module; An input end of the sixth switch is electrically connected to an output end of the fourth signal processing module; The input end of the fourth electrode is electrically connected to the output ends of the seventh switch and the eighth switch; the input end of the seventh switch is electrically connected to the output end of the sixth signal processing module; the input end of the eighth switch is electrically connected to the output end of the eighth signal processing module; The amplitude changes of the external alternating current signals input to the Y component input terminals of the first signal processing module and the third signal processing module are the same, and the phases are opposite; the amplitude changes of the external alternating current signals input to the Y component input terminals of the first signal processing module, the second signal processing module, the fifth signal processing module, and the sixth signal processing module are the same, and the phases are the same; the amplitude changes of the external alternating current signals input to the Y component input terminals of the third signal processing module, the fourth signal processing module, the seventh signal processing module, and the eighth signal processing module are the same, and the phases are the same.

6. A rotation control circuit for a microscopic particle chain according to claim 5, characterized in that: The ITO electrode module also includes a glass substrate; the first electrode, the second electrode, the third electrode and the fourth electrode are all bonded to the glass substrate; the end of the electrode is a trapezoidal structure, and the width of the electrode end is 170μm; the electrode material is ITO, and the thickness is 200nm; the distance between the first electrode and the second electrode is 320μm; the distance between the third electrode and the fourth electrode is 320μm.

7. A rotation control circuit for a microscopic particle chain according to any one of claims 1 to 6, characterized in that: The model of the communication module is CH340C; the model of the main control module is STM32F407ZGT6; the model of the digital-to-analog conversion module is GP8101 S; and the model of the signal processing module is AD633.

8. A rotation control circuit for a microscopic particle chain according to any one of claims 1 to 6, characterized in that: The rotation control circuit also includes a knob module electrically connected to the main control chip; the knob module is an eight-position knob switch; the eight pins of the eight-position knob switch are electrically connected to an I / O port of the main control chip respectively.

9. A rotation control device for a microscopic particle chain, characterized in that: A rotation control circuit comprising a microscopic particle chain as described in any one of claims 1 to 8.

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