CN111906092A - Low-voltage electric dust removal system based on bipolar electret and dust removal method thereof - Google Patents
Low-voltage electric dust removal system based on bipolar electret and dust removal method thereof Download PDFInfo
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- CN111906092A CN111906092A CN202010680846.XA CN202010680846A CN111906092A CN 111906092 A CN111906092 A CN 111906092A CN 202010680846 A CN202010680846 A CN 202010680846A CN 111906092 A CN111906092 A CN 111906092A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B6/00—Cleaning by electrostatic means
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B13/00—Accessories or details of general applicability for machines or apparatus for cleaning
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Abstract
The invention discloses a bipolar electret-based low-voltage electric dust removal system and a dust removal method thereof. The invention removes the dust adhered on the surface by using the non-uniform alternating traveling wave electric field created by the moving bipolar electret array in the absolute space; an electret film non-source strong electrostatic field effect is utilized, an alternately changed electrostatic field is formed in space through bipolar arrangement, a direct current driving device is utilized to control a bipolar electret array to vibrate or rotate parallel to an adhered surface, and an alternating traveling wave electric field is formed opposite to the adhered surface; the dust particles are separated from the adsorption surface under the attraction of electric field coulomb force and dielectrophoresis force in the alternating traveling wave electric field, so that the dust particles are removed; the invention breaks through the thought limitation that the strong alternating traveling wave electric field effect can only depend on the uniqueness of the high-voltage active power supply, realizes the low-voltage, low-power consumption and high-efficiency removal of the tiny dust, and has the characteristics of non-contact, non-mechanical, array, high applicability and the like.
Description
Technical Field
The invention relates to an electric dust removal technology, in particular to a low-voltage electric dust removal system based on a bipolar electret array motion mode and a dust removal method thereof.
Background
The dust is the first enemy of various precise instruments and equipment which can run reliably for a long time. Fine, hard, dust particles are ubiquitous, both in space and in the atmosphere. The dust in the space comes from the weathering effect of the space (meteor body collision, cosmic ray irradiation, plasma bombardment and the like), and simultaneously, the dust can keep higher charge quantity for a long time under the action of factors such as friction, plasma wind, cosmic ray and the like; atmospheric dust is mainly derived from industrial emissions, combustion smoke dust, soil dust and the like, and only a trace amount of charges are retained under the neutralization action of water vapor. These particles are very easy to adhere to and accumulate on the surface of the equipment under the action of external force (gravity, electrostatic force, van der waals force, capillary force, etc.), resulting in a series of fatal hazards such as imaging blurring of optical systems, abrasion of moving mechanisms, circuit discharge and burning, reduction of energy conversion efficiency of solar panels, damage to physiological health of people, etc. Therefore, it is urgently needed to develop an efficient dust removal method to solve the harm of the tiny dust to the attachment of precision equipment.
Compared with the traditional mechanical brushing and vibration dust removal technology, the electric dust removal technology based on the alternating electric field effect can realize unmanned and autonomous dust removal, and can obtain high dust removal rate (more than 90%) no matter how much the micro-dust is charged. Therefore, the electric dust removal technology is widely applied to the field of photovoltaic cell panel cleaning. When the parallel electrodes are loaded with alternating current, non-uniform electric fields with time-space periodic variation can be generated around the electrodes, so that the micro-dust is repelled by coulomb force and dielectrophoresis force to 'break away' from the constraint of adhesion force, and jump movement is realized. However, the dust jump action usually requires that the amplitude of the alternating electric field is not lower than 1.0MV/m, and the active alternating high voltage required by such a strong electric field is usually in the order of thousands of volts, which not only brings about the problem of high power consumption, but also easily causes the equipment to have electrical breakdown and burn out the electrical system. Although scholars both at home and abroad have tried to form strong alternating electric fields by low voltage power supply using boost modules. However, the method has short continuous working time and low dust transfer efficiency, and the problems of high voltage and high power consumption of the alternating electric field cannot be solved essentially.
Disclosure of Invention
In order to meet the practical requirements and innovation requirements of low-voltage and low-energy-consumption electric precipitation in the fields of production life, aerospace and the like, the invention provides a low-voltage electric precipitation system based on a bipolar electret array motion mode and a precipitation method thereof, which are used for realizing low-voltage, low-power-consumption and high-efficiency removal of micro-dust and have the characteristics of non-contact, arraying, good stability, high applicability and the like.
One objective of the invention is to provide a low-voltage electric dust removal system based on a bipolar electret array motion mode.
The low-voltage electric dust removal system based on the bipolar electret array motion mode can adopt a vibration type and a rotation type.
By adopting vibration, the low-voltage electric dust removal system based on the movement mode of the bipolar electret array comprises: the device comprises a substrate, a printed circuit board, a bipolar electret array, a connecting spring, a support, a mobile device, a direct current telescopic motor, a low-voltage direct current power supply, a microcontroller, a wireless communication unit and an upper computer; the base plate is flat and parallel to the adsorption surface to be dedusted; arranging a printed circuit board on the surface of the substrate facing the adsorption surface, wherein the printed circuit board is flat; forming a bipolar electret array on the surface of the printed circuit board facing the adsorption surface; the bipolar electret array is formed by a plurality of electret units which are periodically arranged in a one-dimensional way; each electret unit comprises a back electrode and an electret film formed on the back electrode; a plurality of back electrodes which are periodically arranged in a one-dimensional mode are etched on the printed circuit board, an electret film is formed on the surface, facing the adsorption surface, of each back electrode, and the surface of each electret film is provided with polarization charges; the polarity of the electret unit is the same as that of the surface polarization charge of the electret film; the surface polarization charges of the electret films of the adjacent electret units have opposite polarities and are insulated from each other, so that the polarities of the adjacent electret units are also opposite and are insulated from each other; a plurality of electret units which are periodically arranged in a one-dimensional mode and alternate in positive and negative polarities form a bipolar electret array; the periphery of the substrate is connected to the bracket through a plurality of connecting springs in central symmetry; the bottom end of the bracket is provided with a moving device and a plurality of pulleys which are centrosymmetric; the direct current telescopic motor is fixed on the bracket and is connected with the base plate through a push rod of the direct current telescopic motor; the direct current telescopic motor is electrically connected to a low-voltage direct current power supply; the low-voltage direct-current power supply is electrically connected to the microcontroller and the wireless communication unit; the microcontroller is also electrically connected to the wireless communication unit and the direct current telescopic motor; the wireless communication unit is connected with the upper computer through a wireless network; the bipolar electret array is opposite to and parallel to the adsorption surface; because the polarity of the polarized charges on the surfaces of the adjacent electret units is opposite, based on the non-source strong electrostatic field effect of the electret film, the bipolar electret array forms an alternately-changed non-uniform electric field along the one-dimensional arrangement direction; the electret array is used as an electric field source, and the generated electric field moves along with the electret array; the microcontroller controls a push rod of the direct current telescopic motor to stretch back and forth to drive the bipolar electret array to vibrate along the one-dimensional arrangement direction; inducing the non-uniform electric field in the absolute space along the one-dimensional arrangement direction to change alternately, and generating an alternating traveling wave electric field without an electric field zero point and with multiple peak points; the micro-dust is separated from the adsorption surface under the attraction of coulomb force and dielectrophoresis force in the traveling wave electric field, and the average stress is larger in the change period of the same electric field, so that the electric removal of the micro-dust driven by low voltage is realized; and after the micro dust in the area covered by the array is completely removed, the low-voltage electric dust removal system is moved to the area which is not removed by the moving device to continuously remove the micro dust until the cleaning operation is completed.
By adopting a rotary type, the low-voltage electric dust removal system based on the movement mode of the bipolar electret array comprises: the device comprises a cylindrical substrate, a printed circuit board, a bipolar electret array, a support, a mobile device, a shaft lever, a direct current rotating motor, a low-voltage direct current power supply, a microcontroller, a wireless communication unit and an upper computer; wherein, the cylindrical substrate is cylindrical; arranging a printed circuit board on the surface of the outer side wall of the cylindrical substrate, wherein the printed circuit board is cylindrical; forming a bipolar electret array on an outer surface of the printed circuit board; the bipolar electret array is formed by a plurality of electret units which are periodically arranged in the circumferential direction; each electret unit comprises a back electrode and an electret film formed on the back electrode; a plurality of back electrodes which are periodically arranged are etched on the printed circuit board, an electret film is formed on the outer surface of each back electrode, and the surface of the electret film is provided with polarized charges; the polarity of the electret unit is the same as that of the surface polarization charge of the electret film; the surface polarization charges of the electret films of the adjacent electret units are opposite in polarity and are insulated from each other, so that the adjacent electret units are also opposite in polarity and are insulated from each other; a bipolar electret array is formed by a plurality of electret units which are periodically arranged in the circumferential direction and alternate in positive and negative polarities; the two ends of the central shaft of the cylindrical substrate are connected to the bracket through shaft levers; the bottom end of the bracket is provided with a moving device; the direct current rotating motor is connected to the cylindrical substrate; the direct current rotating motor is electrically connected to a low-voltage direct current power supply; the low-voltage direct-current power supply is electrically connected to the microcontroller and the wireless communication unit; the microcontroller is also electrically connected to the wireless communication unit and the direct current telescopic motor; the wireless communication unit is connected with the upper computer through a wireless network; the cylindrical bipolar electret array is tangent to the adsorption surface; because the polarity of the polarized charges on the surfaces of the adjacent electret units is opposite, based on the non-source strong electrostatic field effect of the electret thin film, the bipolar electret array forms an alternatively-changed non-uniform electric field in the tangential direction of array arrangement; the electret array is used as an electric field source, and the generated electric field moves along with the electret array; a moving device is arranged at the bottom end of the bracket; the microcontroller controls the direct current rotating motor to rotate, and the direct current rotating motor drives the cylindrical substrate to rotate around the central shaft, so that the bipolar electret array is driven to rotate around the central shaft; inducing the non-uniform electric field in the absolute space along the tangential direction of the array arrangement to change alternately, and generating an alternating traveling wave electric field without an electric field zero point and a multi-peak point; the micro-dust is separated from the adsorption surface under the attraction of coulomb force and dielectrophoresis force in the traveling wave electric field, so that the electric removal of the micro-dust driven by low voltage is realized; and after the micro dust in the area covered by the array is completely removed, the low-voltage electric dust removal system is moved to the area which is not removed by the moving device to continuously remove the micro dust until the cleaning operation is completed.
The mobile device adopts a plurality of pulleys with central symmetry and is arranged at the bottom end of the bracket.
The voltage of the low-voltage direct-current power supply is 5V-12V; the low voltage DC power supply provides working voltage for the wireless communication unit, the microcontroller and the DC or the rotating motor.
The electret film comprises an electret substrate and polarization charges on the surface of the electret substrate; the electret substrate is made of one of polyethylene terephthalate (PET), polypropylene (PP) and polyethylene naphthalate (PEN).
The printed circuit board is made of glass fiber; the back electrode adopts a metal electrode, and the periodic etching forms one-dimensional array arrangement on the printed circuit board; the back electrodes arranged in one-dimensional mode are alternately and respectively connected with the same lead, namely the back electrodes positioned at even number positions are connected through the same lead, and the back electrodes positioned at odd number positions are connected through the same lead. The cross section of the back electrode, namely the cross section vertical to the substrate, is a regular pattern, such as a circle, a trapezoid or a rectangle; the planar shape of the electret unit is not only a straight line but also a broken line, and all the electret units are parallel to each other.
The electret film adopts a micro-nano process shapeOn the back electrode: coating the material of the electret film on a printed circuit board etched with periodically arranged back electrodes by a spin coating process; then, a metal layer is evaporated on the surface of the material of the electret film and is patterned into a metal mask; then, using O2Corroding the material of the electret film by plasma to prepare electret substrates which are arranged in an array and formed on the back electrode; the surface of the electret substrate is polarized to have a polarization charge, thereby forming an electret film.
The surface of the electret film has a polarization charge by polarization. The electret polarizing method comprises: generating positive and negative charges in the air above the electret substrate by adopting a ray ionization or corona discharge mode, then alternately and respectively connecting the back electrodes of the electret units which are periodically arranged with a high-voltage power supply and grounding to form a bipolar back electrode array, forming a bias polarization high-voltage electric field which points to the alternate change between the bipolar back electrode arrays to drive the positive and negative opposite charges to be separated and accelerated, respectively and alternately injecting electret films of the electret units which are periodically arranged with opposite polarities to form the bipolar electret array; the polarity of the electret unit after polarization is opposite to that of the back electrode of the electret unit during polarization.
The bipolar electret array is based on the effect of a non-source strong electrostatic field of an electret film, and the strength of an alternating traveling wave electric field depends on the properties of the electret film, such as thickness, dielectric constant and surface potential.
Whether oscillating or rotating, the distance between the array of bipolar electrets and the surface being adhered does not exceed twice the width of the electret units.
The alternating property of an alternating traveling wave electric field generated by the vibrating bipolar electret array depends on the vibration mode of the bipolar electret array and the scale effect of array patterns, the alternating frequency of the electric field can be regulated and controlled by controlling the width and the distance of electret units in the bipolar electret array, and the alternating waveform of the electric field can be regulated and controlled by controlling the vibration function of the bipolar electret array.
The alternation of an alternating traveling wave electric field generated by a rotary bipolar electret array depends on the rotation mode of the bipolar electret array and the scale effect of an array pattern, the alternating frequency of the electric field can be regulated and controlled by controlling the width and the distance of electret units in the bipolar electret array, and the alternating waveform of the electric field can be regulated and controlled by controlling the rotation frequency of the bipolar electret array.
The stress of the dust particles in the alternating traveling wave electric field generated by the vibrating bipolar electret array is determined by the electrical parameters and the oscillation motion parameters of the bipolar electret array and the physical property parameters of the dust particles; the electrical parameters of the bipolar electret array comprise the surface potential of the electret film, the width and the spacing of the electret units; the oscillation motion parameters of the bipolar electret array comprise vibration frequency and amplitude; the physical attribute parameters of the dust particles comprise granularity, density and charge-to-mass ratio; when the electret surface potential is higher, the width and the distance of the electret units are narrower, the vibration frequency of the bipolar electret array is faster, the amplitude is larger, and the charge-to-mass ratio of the dust is higher, the stress strength of the dust in one vibration period of the bipolar electret array is higher, and the dust is easier to remove.
The stress of the dust particles in the alternating traveling wave electric field generated by the rotary bipolar electret array is determined by the electrical parameters, the rotation motion parameters and the physical attribute parameters of the dust particles of the bipolar electret array; the electrical parameters of the polar electret array comprise the surface potential of the electret film, the width and the spacing of the electret units; the parameters of the rotary motion of the bipolar electret array comprise a rotary frequency and a rotary angle; the physical attribute parameters of the dust particles comprise granularity, density and charge-to-mass ratio; when the electret surface potential is higher, the width and the distance of the electret units are narrower, the rotation frequency of the bipolar electret array is faster, the rotation angle is larger, and the dust-to-charge ratio is higher, the stress strength of dust in one rotation period of the bipolar electret array is higher, and the dust is easier to remove.
And further, the electric field is a coupling electric field, the intensity of the electric field is greater than the alternating traveling wave electric field generated by the bipolar electret, namely the alternating traveling wave electric field generated by the array of the bipolar electret is enhanced by the electric field applied by the back electrode. The voltage of the boosting power supply is 0-200V.
The invention also aims to provide a low-voltage electric dust removal method based on the motion mode of the bipolar electret array.
The low-voltage electric dust removing method adopts a vibration type or a rotation type.
The invention discloses a low-voltage electric precipitation method based on a bipolar electret array motion mode, which adopts a vibration mode and comprises the following steps:
1) preparing a low-voltage electric dust removal system based on a bipolar electret array motion mode:
a) arranging a printed circuit board on the surface of the flat-plate-shaped substrate facing the adsorption surface, wherein the printed circuit board is flat-plate-shaped;
b) forming a bipolar electret array on the surface of the printed circuit board facing the adsorption surface; the bipolar electret array is formed by a plurality of electret units which are periodically arranged in a one-dimensional way; each electret unit comprises a back electrode and an electret film formed on the back electrode; a plurality of back electrodes which are periodically arranged in a one-dimensional mode are etched on the printed circuit board, an electret film is formed on the surface, facing the adsorption surface, of each back electrode, and the surface of each electret film is provided with polarization charges; the polarity of the electret unit is the same as that of the surface polarization charge of the electret film; the surface polarization charges of the electret films of the adjacent electret units are opposite in polarity and are insulated from each other, so that the adjacent electret units are also opposite in polarity and are insulated from each other; a plurality of electret units which are periodically arranged in a one-dimensional mode and alternate in positive and negative polarities form a bipolar electret array;
c) the periphery of the substrate is connected to the bracket through a plurality of connecting springs in central symmetry; a moving device is arranged at the bottom end of the bracket;
d) the direct current telescopic motor is arranged on the bracket and is connected with the base plate through a push rod; the direct current telescopic motor is electrically connected to a low-voltage direct current power supply; the low-voltage direct-current power supply is electrically connected to the microcontroller and the wireless communication unit; the microcontroller is also electrically connected to the wireless communication unit and the direct current telescopic motor; the wireless communication unit is connected with the upper computer through a wireless network;
2) the bipolar electret array is opposite to and parallel to the adsorption surface;
3) because the polarity of the polarized charges on the surfaces of the adjacent electret units is opposite, based on the non-source strong electrostatic field effect of the electret film, the bipolar electret array forms an alternately-changed non-uniform electric field along the one-dimensional arrangement direction; the electret array is used as an electric field source, and the generated electric field moves along with the electret array;
4) the microcontroller controls a push rod of the direct current telescopic motor to stretch back and forth to drive the bipolar electret array to vibrate along the one-dimensional arrangement direction; inducing the non-uniform electric field in the absolute space along the one-dimensional arrangement direction to change alternately, and generating an alternating traveling wave electric field without an electric field zero point and with multiple peak points;
5) the micro-dust is separated from the adsorption surface under the attraction of coulomb force and dielectrophoresis force in the traveling wave electric field, and the average stress is larger in the change period of the same electric field, so that the electric removal of the micro-dust driven by low voltage is realized;
6) and after the micro dust in the area covered by the array is completely removed, the low-voltage electric dust removal system is moved to the area which is not removed by the moving device to continuously remove the micro dust until the cleaning operation is completed.
The invention discloses a low-voltage electric precipitation method based on a bipolar electret array motion mode, which adopts a rotary type and comprises the following steps:
1) preparing a low-voltage electric dust removal system based on a bipolar electret array motion mode:
a) arranging a printed circuit board on the surface of the outer side wall of the cylindrical substrate, wherein the printed circuit board is cylindrical;
b) forming a bipolar electret array on an outer surface of the printed circuit board; the bipolar electret array is formed by a plurality of electret units which are periodically and circumferentially arranged; each electret unit comprises a back electrode and an electret film formed on the back electrode; a plurality of back electrodes which are periodically arranged are etched on the printed circuit board, an electret film is formed on the outer surface of each back electrode, and the surface of the electret film is provided with polarized charges; the polarity of the electret unit is the same as that of the surface polarization charge of the electret film; the surface polarization charges of the electret films of the adjacent electret units are opposite in polarity and are insulated from each other, so that the adjacent electret units are also opposite in polarity and are insulated from each other; a bipolar electret array is formed by a plurality of electret units which are periodically arranged in the circumferential direction and alternate in positive and negative polarities;
c) the two ends of the central shaft of the cylindrical substrate are connected to the bracket through shaft levers; the bottom end of the bracket is provided with a moving device;
d) the direct current rotating motor is connected to the cylindrical substrate; the direct current rotating motor is electrically connected to a low-voltage direct current power supply; the low-voltage direct-current power supply is electrically connected to the microcontroller and the wireless communication unit; the microcontroller is also electrically connected to the wireless communication unit and the direct current telescopic motor; the wireless communication unit is connected with the upper computer through a wireless network;
2) the bipolar electret array is tangent to the adsorption surface;
3) because the polarization charges on the surfaces of the adjacent electret units are opposite in polarity, based on the non-source strong electrostatic field effect of the electret thin film, the bipolar electret array forms an alternately-changed non-uniform electric field in the tangential direction of array arrangement; the electret array is used as an electric field source, and the generated electric field moves along with the electret array;
4) the microcontroller controls the direct current rotating motor to rotate, and the direct current rotating motor drives the cylindrical substrate to rotate around the central shaft, so that the bipolar electret array is driven to rotate around the central shaft; inducing the non-uniform electric field in the absolute space along the tangential direction of the array arrangement to change alternately, and generating an alternating traveling wave electric field without an electric field zero point and a multi-peak point;
5) the micro-dust is separated from the adsorption surface under the attraction of coulomb force and dielectrophoresis force in the traveling wave electric field, and the average stress is larger in the change period of the same electric field, so that the electric removal of the micro-dust driven by low voltage is realized;
6) after the dust in the area covered by the array is removed, the whole system is moved to the area which is not removed by the moving device to remove the dust continuously until the cleaning operation is finished.
Further, the back electrode is alternately connected to the positive electrode and the negative electrode of the enhanced power supply, the connection polarity of the back electrode is the same as that of the electret unit, a direct current potential with the same polarity as that of the electret unit is applied to the back electrode of the electret unit, the electric field is a coupling electric field, the intensity of the electric field is larger than that of an alternating traveling wave electric field generated by the bipolar electret, and the alternating traveling wave electric field generated by the bipolar electret array is enhanced through the electric field applied by the back electrode.
The invention has universality to the dust particles, and can remove the dust particles no matter how much the dust particles are charged.
The invention has the advantages that:
the invention removes the dust adhered on the surface by using the non-uniform alternating traveling wave electric field created by the moving bipolar electret array in the absolute space; an electret film non-source strong electrostatic field effect is utilized, an alternately changed electrostatic field is formed in space through bipolar arrangement, a direct current driving device is utilized to control a bipolar electret array to vibrate or rotate parallel to an adhered surface, and an alternating traveling wave electric field is formed opposite to the adhered surface; further, an alternating traveling wave electric field of the electret is enhanced by applying a DC enhancement power supply with the same polarity as the polarized charge of the electret film on the back electrode; the micro-dust is separated from the adsorption surface under the attraction of coulomb force and dielectrophoresis force in the alternating traveling wave electric field, so that the micro-dust is removed; on the premise of keeping the intensity of the alternating traveling wave electric field unchanged, the invention converts a high-voltage high-power-consumption alternating current power supply required by a strong alternating traveling wave electric field into a low-voltage low-power-consumption direct current power supply for driving a bipolar electret array to vibrate or rotate, essentially breaks through the thought limitation that the effect of the strong alternating traveling wave electric field can only depend on the uniqueness of a high-voltage active power supply, realizes the low-voltage, low-power-consumption and high-efficiency removal of tiny dust, and has the characteristics of non-contact, arraying, good stability, high applicability and the like.
Drawings
FIG. 1 is a schematic diagram of a first embodiment of a bipolar electret array motion mode-based low-voltage electric dust removal system of the present invention;
FIG. 2 is a schematic diagram of a second embodiment of the low-voltage electric dust removal system based on the movement pattern of the electret array of the invention;
FIG. 3 is a schematic diagram of an alternating traveling wave electric field generated by a low-voltage electric dust removal system based on a bipolar electret array motion mode of the present invention, wherein (a) - (c) are different motion process diagrams respectively;
FIG. 4 is a comparison graph of the time-varying electric field waveform at the center of the array surface of the alternating traveling wave electric field (solid line) realized based on the oscillation motion of the bipolar electret array and the alternating electric field (dotted line) provided by the high-voltage power supply in the conventional electric curtain;
FIG. 5 is a schematic view of a configuration of a bipolar electret array in which (a) is linear and (b) and (c) are each dogleg;
fig. 6 is a comparison graph of coulomb force and dielectrophoresis force (solid line) received in an alternating traveling wave electric field realized by the low-voltage electric dust removal system based on the movement mode of the bipolar electret array of the present invention and coulomb force and dielectrophoresis force (dotted line) received in an alternating electric field provided by a high-voltage power supply in a conventional electric curtain, wherein (a) and (b) are graphs of the dielectrophoresis force in the x-axis direction and the y-axis direction, respectively, and (c) and (d) are graphs of the coulomb force in the x-axis direction and the y-axis direction, respectively.
Detailed Description
The invention will be further elucidated by means of specific embodiments in the following with reference to the drawing.
Example one
As shown in fig. 1, the present embodiment adopts a vibration mode, and the low-voltage electric dust removal system based on the motion mode of the bipolar electret array of the present embodiment includes: the device comprises a base plate 21, a printed circuit board 1, a bipolar electret array 3, a connecting spring 4, a support 5, a moving device 6, a push rod 7, a direct current telescopic motor 81, a low-voltage direct current power supply 9, a microcontroller 10, a wireless communication unit 11 and an upper computer 12; the base plate 21 is flat and parallel to the adsorption surface 01 to be dedusted; arranging a printed circuit board 1 on the surface of the substrate facing the adsorption surface, wherein the printed circuit board 1 is flat; forming a bipolar electret array 3 on a surface of the printed circuit board 1 facing the adsorption surface; the bipolar electret array 3 is composed of a plurality of electret units which are periodically arranged in a one-dimensional way; each electret unit comprises a back electrode and an electret film formed on the back electrode; a plurality of back electrodes arranged periodically are etched on the printed circuit board 1, an electret film is formed on the outer surface of each back electrode, and the surface of the electret film has polarization charges; the polarity of the electret unit is the same as that of the surface polarization charge of the electret film; the surface polarization charges of the electret films of the adjacent electret units are opposite in polarity and are insulated from each other, so that the adjacent electret units are also opposite in polarity and are insulated from each other; a bipolar electret array 3 is formed by a plurality of electret units which are periodically arranged in the circumferential direction and alternate in positive and negative polarities; the periphery of the substrate is connected to a bracket 5 through a plurality of connecting springs 4 with central symmetry; the bottom end of the support 5 is provided with a moving device 6, the support 5 adopts two support rods, two support rods are respectively arranged at two ends of the substrate 21 along the length direction, the moving device 6 adopts pulleys, and the bottom end of each support rod is provided with a pulley; the direct current telescopic motor is fixed on a support rod and is connected with the base plate through a push rod 7; the direct current telescopic motor is electrically connected to a low-voltage direct current power supply 9; the low voltage dc power supply 9 is electrically connected to the microcontroller 10 and the wireless communication unit 11; the microcontroller 10 is also electrically connected to the wireless communication unit 11 and the dc telescoping motor; the wireless communication unit 11 is connected with the upper computer 12 through a wireless network; the bipolar electret array 3 is opposite to and parallel to the adsorption surface; because the polarization charges on the surfaces of the adjacent electret units are opposite in polarity, the bipolar electret array 3 forms an alternately-changed non-uniform electric field in the one-dimensional arrangement direction based on the non-source strong electrostatic field effect of the electret film; the electret array is used as an electric field source, and the generated electric field moves along with the electret array; the microcontroller 10 controls the push rod 7 of the direct current telescopic motor to extend back and forth to drive the bipolar electret array 3 to vibrate along the one-dimensional arrangement direction; inducing the non-uniform electric field in the absolute space along the one-dimensional arrangement direction to change alternately, and generating an alternating traveling wave electric field without an electric field zero point and with multiple peak points; the dust particles 02 are separated from the adsorption surface under the attraction of coulomb force and dielectrophoresis force in the traveling wave electric field, and the average stress is larger in the change period of the same electric field, so that the low-voltage driven dust particles are electrically removed; and after the micro dust in the area covered by the array is completely removed, the low-voltage electric dust removal system is moved to the area which is not removed by the moving device to continuously remove the micro dust until the cleaning operation is completed.
As shown in fig. 3(a), when the bipolar electret array 3 is at rest, the dust particles approach the electret array under the attraction of coulomb and dielectrophoretic forces. As shown in fig. 3(b), when the bipolar electret array 3 moves forward, an alternating traveling wave electric field effect is generated, the direction of the electric field at the same position is changed, and at this time, the dust particles are driven away by the electric field, and a forward driving speed is generated. If the forward dissipation force is large enough, the forward drive speed does not decay to zero even during the electret array reverse motion period, as shown in fig. 3 (c). During the next cycle of forward motion of the array, the mote gets a higher forward drive speed. Therefore, the directional movement of the dust particles is realized in the whole.
In this embodiment, the upper computer 12 is a notebook, the wireless communication unit 11 is an nRF24LE1 chip, and the microcontroller 10 is an STM32 single chip microcomputer; the low-voltage direct-current power supply 9 adopts a 12V battery for power supply; the direct current telescopic motor adopts a linear push rod 7 telescopic motor; the printed circuit board 1 is made of glass fiber FR 4; the piezoelectric electret film may use polyethylene terephthalate (PET).
Example two
As shown in fig. 2, the embodiment adopts a rotary type, and the low-voltage electric dust removal system based on the motion mode of the electret array of the embodiment includes: the device comprises a cylindrical substrate 22, a printed circuit board 1, a bipolar electret array 3, a support 5, a mobile device 6, a shaft rod, a direct current rotating motor 82, a low-voltage direct current power supply 9, a microcontroller 10, a wireless communication unit 11 and an upper computer 12; wherein, the cylindrical substrate 22 is cylindrical; arranging a printed circuit board 1 on the surface of the outer side wall of the cylindrical substrate, wherein the printed circuit board 1 is cylindrical; forming a bipolar electret array 3 on an outer surface of the printed circuit board 1; the bipolar electret array 3 is composed of a plurality of electret units which are periodically arranged in the circumferential direction; each bipolar electret unit comprises a back electrode and an electret film formed on the back electrode; a plurality of back electrodes arranged periodically are etched on the printed circuit board 1, an electret film is formed on the outer surface of each back electrode, and the surface of the electret film has polarization charges; the polarization charges on the surfaces of the adjacent electret units have opposite polarities to form a bipolar electret array 3; the two ends of the central shaft of the cylindrical base are connected to the bracket 5 through shaft rods; the bottom end of the bracket 5 is provided with a moving device 6, the bracket 5 adopts two pairs of supporting rods, two ends of the cylindrical substrate are respectively provided with a pair of supporting rods, the moving device 6 adopts a pulley, and the bottom end of each supporting rod is provided with a pulley; a dc rotating motor 82 is connected to the cylindrical base; the dc rotating electrical machine 82 is electrically connected to the low-voltage dc power supply 9; the low voltage dc power supply 9 is electrically connected to the microcontroller 10 and the wireless communication unit 11; the microcontroller 10 is also electrically connected to the wireless communication unit 11 and the dc telescoping motor; the wireless communication unit 11 is connected with the upper computer 12 through a wireless network; the cylindrical bipolar electret array 3 is tangent to the adsorption surface; because the polarity of the polarized charges on the surfaces of the adjacent electret units is opposite, based on the effect of the non-source strong static electricity field of the electret film, the bipolar electret array 3 forms an alternatively-changed non-uniform electric field in the tangential direction of array arrangement; the electret array is used as an electric field source, and the generated electric field moves along with the electret array; a moving device is arranged at the bottom end of the bracket 5; the microcontroller 10 controls the direct current rotating motor 82 to rotate, and the direct current rotating motor drives the cylindrical substrate to rotate around the central shaft, so that the bipolar electret array 3 is driven to rotate around the central shaft; inducing the non-uniform electric field in the absolute space along the tangential direction of the array arrangement to change alternately, and generating an alternating traveling wave electric field without an electric field zero point and a multi-peak point; the micro-dust is separated from the adsorption surface under the attraction of coulomb force and dielectrophoresis force in the traveling wave electric field, so that the electric removal of the micro-dust driven by low voltage is realized; and after the micro dust in the area covered by the array is completely removed, the low-voltage electric dust removal system is moved to the area which is not removed by the moving device to continuously remove the micro dust until the cleaning operation is completed.
In the present embodiment, a rotating brushless motor is used as the dc rotating electric machine.
As shown in FIG. 3, the adsorption surface lies in the plane xoz, the potential Φ for the space above the electret array 3 with width w and spacing g1The (x, y) distribution satisfies the Laplace (Laplace) equation. Thus, phi1The two-dimensional projection of (x, y) onto the xoy plane is:
wherein U is the surface potential of the electret film, λ ═ 2(w + g) is the spatial wavelength,
for the solution of the Laplace equation, the method can be expressed by a Fourier series form as follows:
in the formula, Kn2 n/λ is the spatial frequency, An＝[λ/n2π2b]{cos(nπw/λ)-cos[nπ(w+2g)/λ]Are fourier coefficients.
When the bipolar electret array 3 vibrates or rotates, the motion equation of the bipolar electret array 3 is set as follows:
x＝x(t,T,H) (3)
wherein, H is the amplitude of the oscillating motion, and T is the period of the oscillating motion. The previously derived potential Φ of the space above the array 3 of ambipolar electrets is due to the electric field created by the electret film, which moves with it1On the basis of the (x, y) spatial distribution model, the motion equation of the bipolar electret array 3 replaces the array position coordinates, and a time variable t is introduced, so that a time-varying model of the electric field E in the space above the bipolar electret array 3 can be constructed:
the above equation indicates that the spatial electric field generated by the moving bipolar electret array 3 is a traveling wave electric field. However, if the alternating characteristic is generated, the scale effect between the amplitude H of the oscillation motion and the array spacing w + g must be considered; only have H>w + g, the electric field generated by the bipolar electret array 3 can have an alternating property. Due to the periodicity of the space potential above the bipolar electret array 3, i.e. Φ1(x,y)＝Φ1(x +2w +2g, y). The alternating frequency regulation and control of the electric field are realized by regulating and controlling the frequency 1/T and the amplitude H of the oscillating motion; the regulation and control of the electric field waveform are realized by controlling the motion equation of the bipolar electret array 3. As shown in fig. 4, compared with the standing wave electric field generated when a two-phase alternating current is applied to the parallel electrodes in the prior art, the alternating traveling wave electric field generated by the bipolar electret array 3 has the characteristics of no electric field zero point and multiple peak points.
Let the dust be r in radius, m in mass, q in charge amount, and the relative dielectric constant berThe sphere of (2). The dust particles are separated from the adsorption surface in the electric field mainly under the driving action of the electric field force, wherein the electric field force is coulomb force FColAnd dielectrophoretic force FDepThe resultant force of (a). The expressions for coulomb force and dielectrophoretic force are as follows:
in the formula (5)0Is the dielectric constant in vacuum. When a DC potential V having the same polarity as the polarization charge of the electret film is applied to the back electrode, a potential field phi generated by the back electrode2(x, y) is:
then the potential field is now
From the equation (7), the alternating traveling wave electric field at this time is a coupling electric field, and the intensity of the coupling electric field is greater than that of the alternating traveling wave electric field generated by the bipolar electret array, that is, the electric field applied by the back electrode will enhance the alternating traveling wave electric field generated by the bipolar electret array.
As shown in fig. 5, the electret unit may be formed not only in a straight shape parallel to fig. 5(a) but also in a zigzag shape as shown in fig. 5(b) or (c).
For single dust with mass m, the single dust bears coulomb force (the coulomb force in the direction of x axis is F) in the alternating travelling wave electric field of the bipolar electret array 3col,xThe coulomb force in the y-axis direction is Fcol,y) And dielectrophoretic force (dielectrophoretic force in x-axis direction F)Dep,xDielectrophoretic force in the y-axis direction of FDep,y) The compound driving action of (1). As the micro dust is always acted by a strong electric field force in the alternating traveling wave electric field of the moving electret array, and the coulomb force and the dielectrophoresis force (shown by a solid line) generated by the alternating traveling wave electric field of the bipolar electret array 3 are stronger than those generated by the alternating traveling wave electric field of the traditional alternating current power supply (shown by a dotted line), and the frequency change is faster. Because the movement of single dust in the electret alternating traveling wave electric field is mainly under the composite action of coulomb force and dielectrophoresis force:
the coulomb force is in direct function relation with the electric field intensity and the dust charge amount, and the dielectrophoresis force is in positive correlation with the electric field intensity and the time change rate of the electric field. When the surface potential of the electret film is higher and the width and the distance of the electret units are narrower, the electric field intensity is higher; the faster the bipolar electret array 3 vibrates or rotates, the higher the time change rate of the electric field; the higher the particulate charge to mass ratio, the greater the amount of particulate charge. Therefore, as shown in fig. 6, compared with the traveling wave electric field generated by the conventional ac power supply, the larger the force intensity of the dust particles in one movement period of the electret array 3 is, i.e. the alternating traveling wave electric field formed by the electret array 3 is more beneficial to removing the dust particles.
Therefore, the alternating traveling wave electric field of the bipolar electret has universality on the dust, and the dust can be removed no matter how much the dust is charged.
Finally, it is noted that the disclosed embodiments are intended to aid in further understanding of the invention, but those skilled in the art will appreciate that: various substitutions and modifications are possible without departing from the spirit and scope of the invention and the appended claims. Therefore, the invention should not be limited to the embodiments disclosed, but the scope of the invention is defined by the appended claims.
Claims (10)
1. A low-voltage electric dust removal system based on a bipolar electret array motion mode is characterized in that a vibration mode is adopted, and the low-voltage electric dust removal system comprises: the device comprises a substrate, a printed circuit board, a bipolar electret array, a connecting spring, a support, a mobile device, a direct current telescopic motor, a low-voltage direct current power supply, a microcontroller, a wireless communication unit and an upper computer; the base plate is flat and parallel to the adsorption surface to be dedusted; arranging a printed circuit board on the surface of the substrate facing the adsorption surface, wherein the printed circuit board is flat; forming a bipolar electret array on the surface of the printed circuit board facing the adsorption surface; the bipolar electret array is formed by a plurality of electret units which are periodically arranged in a one-dimensional way; each electret unit comprises a back electrode and an electret film formed on the back electrode; a plurality of back electrodes which are periodically arranged in a one-dimensional mode are etched on the printed circuit board, an electret film is formed on the surface, facing the adsorption surface, of each back electrode, and the surface of each electret film is provided with polarization charges; the polarity of the electret unit is the same as that of the surface polarization charge of the electret film; the surface polarization charges of the electret films of the adjacent electret units have opposite polarities and are insulated from each other, so that the polarities of the adjacent electret units are also opposite and are insulated from each other; a plurality of electret units which are periodically arranged in a one-dimensional mode and alternate in positive and negative polarities form a bipolar electret array; the periphery of the substrate is connected to the bracket through a plurality of connecting springs in central symmetry; the bottom end of the bracket is provided with a moving device and a plurality of pulleys which are centrosymmetric; the direct current telescopic motor is fixed on the bracket and is connected with the base plate through a push rod of the direct current telescopic motor; the direct current telescopic motor is electrically connected to a low-voltage direct current power supply; the low-voltage direct-current power supply is electrically connected to the microcontroller and the wireless communication unit; the microcontroller is also electrically connected to the wireless communication unit and the direct current telescopic motor; the wireless communication unit is connected with the upper computer through a wireless network; the bipolar electret array is opposite to and parallel to the adsorption surface; because the polarity of the polarized charges on the surfaces of the adjacent electret units is opposite, based on the non-source strong electrostatic field effect of the electret film, the bipolar electret array forms an alternately-changed non-uniform electric field along the one-dimensional arrangement direction; the electret array is used as an electric field source, and the generated electric field moves along with the electret array; the microcontroller controls a push rod of the direct current telescopic motor to stretch back and forth to drive the bipolar electret array to vibrate along the one-dimensional arrangement direction; inducing the non-uniform electric field in the absolute space along the one-dimensional arrangement direction to change alternately, and generating an alternating traveling wave electric field without an electric field zero point and with multiple peak points; the micro-dust is separated from the adsorption surface under the attraction of coulomb force and dielectrophoresis force in the traveling wave electric field, and the average stress is larger in the change period of the same electric field, so that the electric removal of the micro-dust driven by low voltage is realized; and after the micro dust in the area covered by the array is completely removed, the low-voltage electric dust removal system is moved to the area which is not removed by the moving device to continuously remove the micro dust until the cleaning operation is completed.
2. A low-voltage electric dust removal system based on a bipolar electret array motion mode is characterized in that a rotary type is adopted, and the low-voltage electric dust removal system comprises: the device comprises a cylindrical substrate, a printed circuit board, a bipolar electret array, a support, a mobile device, a shaft lever, a direct current rotating motor, a low-voltage direct current power supply, a microcontroller, a wireless communication unit and an upper computer; wherein, the cylindrical substrate is cylindrical; arranging a printed circuit board on the surface of the outer side wall of the cylindrical substrate, wherein the printed circuit board is cylindrical; forming a bipolar electret array on an outer surface of the printed circuit board; the bipolar electret array is formed by a plurality of electret units which are periodically arranged in the circumferential direction; each electret unit comprises a back electrode and an electret film formed on the back electrode; a plurality of back electrodes which are periodically arranged are etched on the printed circuit board, an electret film is formed on the outer surface of each back electrode, and the surface of the electret film is provided with polarized charges; the polarity of the electret unit is the same as that of the surface polarization charge of the electret film; the surface polarization charges of the electret films of the adjacent electret units are opposite in polarity and are insulated from each other, so that the adjacent electret units are also opposite in polarity and are insulated from each other; a bipolar electret array is formed by a plurality of electret units which are periodically arranged in the circumferential direction and alternate in positive and negative polarities; the two ends of the central shaft of the cylindrical substrate are connected to the bracket through shaft levers; the bottom end of the bracket is provided with a moving device; the direct current rotating motor is connected to the cylindrical substrate; the direct current rotating motor is electrically connected to a low-voltage direct current power supply; the low-voltage direct-current power supply is electrically connected to the microcontroller and the wireless communication unit; the microcontroller is also electrically connected to the wireless communication unit and the direct current telescopic motor; the wireless communication unit is connected with the upper computer through a wireless network; the cylindrical bipolar electret array is tangent to the adsorption surface; because the polarity of the polarized charges on the surfaces of the adjacent electret units is opposite, based on the non-source strong electrostatic field effect of the electret thin film, the bipolar electret array forms an alternatively-changed non-uniform electric field in the tangential direction of array arrangement; the electret array is used as an electric field source, and the generated electric field moves along with the electret array; a moving device is arranged at the bottom end of the bracket; the microcontroller controls the direct current rotating motor to rotate, and the direct current rotating motor drives the cylindrical substrate to rotate around the central shaft, so that the bipolar electret array is driven to rotate around the central shaft; inducing the non-uniform electric field in the absolute space along the tangential direction of the array arrangement to change alternately, and generating an alternating traveling wave electric field without an electric field zero point and a multi-peak point; the micro-dust is separated from the adsorption surface under the attraction of coulomb force and dielectrophoresis force in the traveling wave electric field, so that the electric removal of the micro-dust driven by low voltage is realized; and after the micro dust in the area covered by the array is completely removed, the low-voltage electric dust removal system is moved to the area which is not removed by the moving device to continuously remove the micro dust until the cleaning operation is completed.
3. The low-voltage electric precipitation system of claim 1 or 2, wherein the moving device is a plurality of pulleys with central symmetry and is arranged at the bottom end of the bracket.
4. The low-voltage electric precipitation system of claim 1 or 2, wherein the voltage of the low-voltage direct-current power supply is 5V to 12V; the low voltage DC power supply provides working voltage for the wireless communication unit, the microcontroller and the DC or the rotating motor.
5. The low-voltage electric precipitation system of claim 1 or 2, wherein the printed circuit board is made of glass fiber; the back electrode adopts a metal electrode, and the periodic etching forms one-dimensional array arrangement on the printed circuit board; the back electrodes arranged in one-dimensional mode are alternately and respectively connected with the same lead, namely the back electrodes positioned at even number positions are connected through the same lead, and the back electrodes positioned at odd number positions are connected through the same lead.
6. The low-voltage electric precipitation system of claim 1 or 2, wherein the distance between the array of bipolar electrets and the surface to be adhered is no more than twice the width of the electret units.
7. The low-voltage electric precipitation system of claim 1 or 2, wherein the cross section of the back electrode, namely the cross section vertical to the substrate, is a regular pattern; the planar shape of the back electrode is the same as that of the electret film, the back electrode is vertically aligned to form the planar shape of the electret units, the planar shape of the electret units is parallel straight lines or fold lines, and all the electret units are parallel to each other.
8. The low-voltage electric precipitation system of claim 1 or 2, further comprising an enhancement power supply, wherein when the electret moves, the back electrode is alternately connected to the positive electrode and the negative electrode of the enhancement power supply, the connection polarity of the back electrode is the same as that of the electret unit to which the back electrode belongs, and a direct current potential with the same polarity as that of the electret unit is applied to the back electrode of the electret unit, so that the electric field at the moment is a coupling electric field, the strength of the coupling electric field is greater than that of an alternating traveling wave electric field generated by the electret, namely, the alternating traveling wave electric field generated by the electret array is enhanced through the electric field applied by the back electrode.
9. The dust removing method for the low-voltage electric dust removing device based on the movement mode of the bipolar electret array as claimed in claim 1, wherein vibration is adopted, and the dust removing method comprises the following steps:
1) preparing a low-voltage electric dust removal system based on a bipolar electret array motion mode:
a) arranging a printed circuit board on the surface of the flat-plate-shaped substrate facing the adsorption surface, wherein the printed circuit board is flat-plate-shaped;
b) forming a bipolar electret array on the surface of the printed circuit board facing the adsorption surface; the bipolar electret array is formed by a plurality of electret units which are periodically arranged in a one-dimensional way; each electret unit comprises a back electrode and an electret film formed on the back electrode; a plurality of back electrodes which are periodically arranged in a one-dimensional mode are etched on the printed circuit board, an electret film is formed on the surface, facing the adsorption surface, of each back electrode, and the surface of each electret film is provided with polarization charges; the polarity of the electret unit is the same as that of the surface polarization charge of the electret film; the surface polarization charges of the electret films of the adjacent electret units are opposite in polarity and are insulated from each other, so that the adjacent electret units are also opposite in polarity and are insulated from each other; a plurality of electret units which are periodically arranged in a one-dimensional mode and alternate in positive and negative polarities form a bipolar electret array;
c) the periphery of the substrate is connected to the bracket through a plurality of connecting springs in central symmetry; a moving device is arranged at the bottom end of the bracket;
d) the direct current telescopic motor is arranged on the bracket and is connected with the base plate through a push rod; the direct current telescopic motor is electrically connected to a low-voltage direct current power supply; the low-voltage direct-current power supply is electrically connected to the microcontroller and the wireless communication unit; the microcontroller is also electrically connected to the wireless communication unit and the direct current telescopic motor; the wireless communication unit is connected with the upper computer through a wireless network;
2) the bipolar electret array is opposite to and parallel to the adsorption surface;
3) because the polarity of the polarized charges on the surfaces of the adjacent electret units is opposite, based on the non-source strong electrostatic field effect of the electret film, the bipolar electret array forms an alternately-changed non-uniform electric field along the one-dimensional arrangement direction; the electret array is used as an electric field source, and the generated electric field moves along with the electret array;
4) the microcontroller controls a push rod of the direct current telescopic motor to stretch back and forth to drive the bipolar electret array to vibrate along the one-dimensional arrangement direction; inducing the non-uniform electric field in the absolute space along the one-dimensional arrangement direction to change alternately, and generating an alternating traveling wave electric field without an electric field zero point and with multiple peak points;
5) the micro-dust is separated from the adsorption surface under the attraction of coulomb force and dielectrophoresis force in the traveling wave electric field, and the average stress is larger in the change period of the same electric field, so that the electric removal of the micro-dust driven by low voltage is realized;
6) and after the micro dust in the area covered by the array is completely removed, the low-voltage electric dust removal system is moved to the area which is not removed by the moving device to continuously remove the micro dust until the cleaning operation is completed.
10. The dust removal method of the low-voltage electric dust removal device based on the bipolar electret array motion mode, which is characterized by adopting a rotary type, is characterized by comprising the following steps:
1) preparing a low-voltage electric dust removal system based on a bipolar electret array motion mode:
a) arranging a printed circuit board on the surface of the outer side wall of the cylindrical substrate, wherein the printed circuit board is cylindrical;
b) forming a bipolar electret array on an outer surface of the printed circuit board; the bipolar electret array is formed by a plurality of electret units which are periodically and circumferentially arranged; each electret unit comprises a back electrode and an electret film formed on the back electrode; a plurality of back electrodes which are periodically arranged are etched on the printed circuit board, an electret film is formed on the outer surface of each back electrode, and the surface of the electret film is provided with polarized charges; the polarity of the electret unit is the same as that of the surface polarization charge of the electret film; the surface polarization charges of the electret films of the adjacent electret units are opposite in polarity and are insulated from each other, so that the adjacent electret units are also opposite in polarity and are insulated from each other; a bipolar electret array is formed by a plurality of electret units which are periodically arranged in the circumferential direction and alternate in positive and negative polarities;
c) the two ends of the central shaft of the cylindrical substrate are connected to the bracket through shaft levers; the bottom end of the bracket is provided with a moving device;
d) the direct current rotating motor is connected to the cylindrical substrate; the direct current rotating motor is electrically connected to a low-voltage direct current power supply; the low-voltage direct-current power supply is electrically connected to the microcontroller and the wireless communication unit; the microcontroller is also electrically connected to the wireless communication unit and the direct current telescopic motor; the wireless communication unit is connected with the upper computer through a wireless network;
2) the bipolar electret array is tangent to the adsorption surface;
3) because the polarization charges on the surfaces of the adjacent electret units are opposite in polarity, based on the non-source strong electrostatic field effect of the electret thin film, the bipolar electret array forms an alternately-changed non-uniform electric field in the tangential direction of array arrangement; the electret array is used as an electric field source, and the generated electric field moves along with the electret array;
4) the microcontroller controls the direct current rotating motor to rotate, and the direct current rotating motor drives the cylindrical substrate to rotate around the central shaft, so that the bipolar electret array is driven to rotate around the central shaft; inducing the non-uniform electric field in the absolute space along the tangential direction of the array arrangement to change alternately, and generating an alternating traveling wave electric field without an electric field zero point and a multi-peak point;
5) the micro-dust is separated from the adsorption surface under the attraction of coulomb force and dielectrophoresis force in the traveling wave electric field, and the average stress is larger in the change period of the same electric field, so that the electric removal of the micro-dust driven by low voltage is realized;
6) after the dust in the area covered by the array is removed, the whole system is moved to the area which is not removed by the moving device to remove the dust continuously until the cleaning operation is finished.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114101221A (en) * | 2021-11-11 | 2022-03-01 | 北京理工大学 | Electret-based surface dust removing system and dust removing method thereof |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3985524A (en) * | 1974-01-04 | 1976-10-12 | Senichi Masuda | Electric dust collector apparatus |
| CN101585015A (en) * | 2008-05-20 | 2009-11-25 | 中国科学院空间科学与应用研究中心 | Plane dust collection device |
| WO2010038872A1 (en) * | 2008-10-03 | 2010-04-08 | ミドリ安全株式会社 | Electric dust collecting apparatus and electric dust collecting system |
| CN102580854A (en) * | 2011-12-29 | 2012-07-18 | 东莞市宇洁新材料有限公司 | Electrostatic precipitation filter with integrated structure and polarization process for electrostatic precipitation filter |
| CN102631989A (en) * | 2012-04-06 | 2012-08-15 | 中国华能集团清洁能源技术研究院有限公司 | Electric mote remover |
| CN106540929A (en) * | 2016-12-01 | 2017-03-29 | 张祖锋 | A kind of three-phase electric curtain of travelling wave dust pelletizing system and its construction method |
| CN108031556A (en) * | 2018-01-10 | 2018-05-15 | 厦门绿洋环境技术股份有限公司 | One kind rotation pole plate electric dust collector and electric precipitator |
| CN208321093U (en) * | 2018-07-24 | 2019-01-04 | 厦门绿洋环境技术股份有限公司 | A kind of electric precipitator with multistage horizontal rotation pole plate electric field |
-
2020
- 2020-07-15 CN CN202010680846.XA patent/CN111906092B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3985524A (en) * | 1974-01-04 | 1976-10-12 | Senichi Masuda | Electric dust collector apparatus |
| CN101585015A (en) * | 2008-05-20 | 2009-11-25 | 中国科学院空间科学与应用研究中心 | Plane dust collection device |
| WO2010038872A1 (en) * | 2008-10-03 | 2010-04-08 | ミドリ安全株式会社 | Electric dust collecting apparatus and electric dust collecting system |
| CN102580854A (en) * | 2011-12-29 | 2012-07-18 | 东莞市宇洁新材料有限公司 | Electrostatic precipitation filter with integrated structure and polarization process for electrostatic precipitation filter |
| CN102631989A (en) * | 2012-04-06 | 2012-08-15 | 中国华能集团清洁能源技术研究院有限公司 | Electric mote remover |
| CN106540929A (en) * | 2016-12-01 | 2017-03-29 | 张祖锋 | A kind of three-phase electric curtain of travelling wave dust pelletizing system and its construction method |
| CN108031556A (en) * | 2018-01-10 | 2018-05-15 | 厦门绿洋环境技术股份有限公司 | One kind rotation pole plate electric dust collector and electric precipitator |
| CN208321093U (en) * | 2018-07-24 | 2019-01-04 | 厦门绿洋环境技术股份有限公司 | A kind of electric precipitator with multistage horizontal rotation pole plate electric field |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114101221A (en) * | 2021-11-11 | 2022-03-01 | 北京理工大学 | Electret-based surface dust removing system and dust removing method thereof |
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|---|---|
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