CN117443475A - Piezoelectric type micro-droplet feeding system and method - Google Patents
Piezoelectric type micro-droplet feeding system and method Download PDFInfo
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- CN117443475A CN117443475A CN202311374175.4A CN202311374175A CN117443475A CN 117443475 A CN117443475 A CN 117443475A CN 202311374175 A CN202311374175 A CN 202311374175A CN 117443475 A CN117443475 A CN 117443475A
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- 238000000034 method Methods 0.000 title claims abstract description 13
- 239000007788 liquid Substances 0.000 claims abstract description 94
- 239000000919 ceramic Substances 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 5
- 238000011002 quantification Methods 0.000 claims description 5
- 239000002184 metal Substances 0.000 claims description 4
- 239000012535 impurity Substances 0.000 claims description 3
- 239000002245 particle Substances 0.000 description 8
- 230000009471 action Effects 0.000 description 4
- 230000033001 locomotion Effects 0.000 description 4
- 238000005452 bending Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000000737 periodic effect Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
- B01L3/00—Containers or dishes for laboratory use, e.g. laboratory glassware; Droppers
- B01L3/02—Burettes; Pipettes
- B01L3/0241—Drop counters; Drop formers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
- B01L2200/00—Solutions for specific problems relating to chemical or physical laboratory apparatus
- B01L2200/06—Fluid handling related problems
- B01L2200/061—Counting droplets
Abstract
A piezoelectric type micro-droplet feeding system and a method belong to the field of micro-droplet feeding devices. The micro-controller regulates output power and waveform, and outputs the output power and waveform to the vibrator through the power regulator, the droplet doser is connected with the droplet doser, liquid is quantitatively conveyed to the droplet doser through the droplet doser, the vibrator is arranged on the outer wall of the droplet doser, stability of droplet dripping is guaranteed, the micro-liquid droplet transfer device is suitable for conveying of droplet and small flow, and the problems that the existing micro-liquid droplet cannot actively fall and the low flow conveying lower limit is low are solved.
Description
Technical Field
The invention relates to a piezoelectric type micro-droplet feeding system and a piezoelectric type micro-droplet feeding method, and belongs to the field of micro-droplet feeding devices.
Background
In experimental research of micro-droplets and related industrial fields, such as the field of ink jet, there is a need for a micro-droplet generation device with good controllability, and when the particle size of the micro-droplets is concerned, there is a need for a device capable of forming a wide-width micro-droplet particle size adjustment capability.
The single droplet continuous generation technology generally adopts a driver to drive the jet liquid at a high frequency, charges the jet liquid through an electrode area after the jet liquid is ejected from a nozzle, and screens charged droplets through a deflection electric field, so that the charged droplets are ejected onto a target object, and the droplet size cannot be accurately controlled. Aiming at the generation of micro-droplets according to the requirement, the pushing distance of the extrusion type driving piece of the driving pump is difficult to accurately control, so that the uniformity of the particle size of the droplets is poor. Patent CN114887833a discloses a cut-off type single droplet generation device, which can effectively solve the problem of uneven particle size, but is mainly applied to large droplets, patent CN112138734a discloses a droplet generation method and device, which improves the control precision of micro droplets, but has poor capability of adjusting the particle size of the micro droplets.
Along with the refinement of industrial production and the deep development of scientific research, the requirements on the particle size and uniformity of micro-droplets are more and more, and the piezoelectric micro-droplet effort device is needed to meet the requirements on the wide-width particle size adjustment of micro-droplets aiming at the problems of poor particle size adjustment capability and uniformity of the existing micro-droplet device.
Disclosure of Invention
The present invention is developed to solve the problem that the micro droplet of the existing micro droplet device cannot fall and the lower limit of the micro flow rate transmission flow is low, and provides a piezoelectric micro droplet feeding system and method, and brief summary of the present invention is provided below to provide a basic understanding of some aspects of the present invention. It should be understood that this summary is not an exhaustive overview of the invention. It is not intended to identify key or critical elements of the invention or to delineate the scope of the invention.
The technical scheme of the invention is as follows:
the first scheme is that the piezoelectric type micro-droplet feeding system comprises a microcontroller, a power regulator, a droplet feeder and a vibrator, wherein the microcontroller regulates output power and waveform, the waveform is output to the vibrator after passing through the power regulator, the droplet feeder is connected with the droplet feeder, liquid is quantitatively conveyed to the droplet feeder through the droplet feeder, and the vibrator is arranged on the outer wall of the droplet feeder.
Preferably: the liquid drop feeder is internally provided with a capillary metal tube.
Preferably: the power regulator is driven by a waveform generated by a microcontroller.
Preferably: the microcontroller generates arbitrary waveforms.
Preferably: the vibrators are arranged in two groups, and the two groups of vibrators are respectively arranged on the outer wall of the liquid drop feeder.
Preferably: the two groups of vibrators are respectively arranged on the outer side of the droplet feeder up and down and are contacted with the outer side of the droplet feeder.
Preferably: the microcontroller generates different vibration parameters to drive the two groups of vibrators respectively.
Preferably: the liquid drop quantification device is a piezoelectric ceramic driven quantification device.
Preferably: the power regulator is a piezoelectric ceramic driving power supply of two paths of power supplies, and the two paths of power supplies are independently output according to different waveforms generated by the microcontroller.
The second scheme and the feeding method of the piezoelectric type micro-droplet are realized by the piezoelectric type micro-droplet feeding system according to the first scheme, and the method comprises the following steps:
step 1, initializing a micro control and a power regulator;
step 2, connecting a liquid drop quantitative device and a liquid drop feeder;
step 3, setting working parameters, starting a liquid drop quantitative device, and discharging air and impurities;
step 4, closing the liquid drop quantitative device after the liquid at the outlet of the liquid drop feeder stably flows out;
step 5, according to the material characteristics and feeding requirements, enabling the microcontroller to set working parameters of the two groups of vibrators respectively, and simultaneously setting working parameters of the liquid drop quantifier;
and 6, starting a liquid drop quantitative device, and then starting a vibrator at the same time to finish feeding of micro liquid drops.
The invention has the following beneficial effects:
the waveform generated by the microcontroller drives the power regulator, the power regulator processes the waveform and outputs the processed waveform to the two vibrators in the form of voltage, and the output of different waveforms meets different vibration requirements; quantitatively conveying the liquid to a wave drop feeder through a liquid drop feeder, and finishing feeding the liquid through the liquid drop feeder; the vibration piece is vertically arranged on the outer side of the wave drop feeder and is in phase inversion contact with the outer side of the liquid drop feeder, so that the vibration piece is used for conveying drop shapes and small flow of liquid, the drop stability of the liquid drops is ensured, and the problems that the existing micro liquid drop shapes cannot actively drop and the low flow limit of micro flow conveying are solved.
Drawings
Fig. 1 is a schematic structural view of a piezoelectric type micro-droplet feeding system according to the present invention.
In the figure: 1-microcontroller, 2-power regulator, 3-drop quantizer, 4-drop feeder, 5-vibrator.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the present invention is described below by means of specific embodiments shown in the accompanying drawings. It should be understood that the description is only illustrative and is not intended to limit the scope of the invention. In addition, in the following description, descriptions of well-known structures and techniques are omitted so as not to unnecessarily obscure the present invention.
The connection mentioned in the invention is divided into a fixed connection and a detachable connection, wherein the fixed connection is a conventional fixed connection mode such as a non-detachable connection including but not limited to a hemmed connection, a rivet connection, an adhesive connection, a welded connection and the like, the detachable connection is a conventional detachable mode such as a threaded connection, a snap connection, a pin connection, a hinge connection and the like, and when a specific connection mode is not limited explicitly, at least one connection mode can be found in the conventional connection mode by default, so that the function can be realized, and a person skilled in the art can select the device according to needs. For example: the fixed connection is welded connection, and the detachable connection is hinged connection.
The first embodiment is as follows: the present embodiment is described with reference to fig. 1, and a piezoelectric type micro-droplet feeding system of the present embodiment includes a micro-controller 1, a power regulator 2, a droplet feeder 3, a droplet feeder 4 and a vibrator 5,
the micro-controller can generate arbitrary waveforms and adjust the frequency, breadth, offset, phase and parameters of the waveforms, and is used for adjusting the vibration amplitude and frequency of the vibrators according to the characteristics of materials, the micro-controller 1 adjusts the output power and the waveforms, the power regulator 2 processes the waveforms and outputs the waveforms to the vibrators 5 in the form of voltage, the liquid drop quantifier 3 is connected with the liquid drop feeder 4 through a pipeline, the vibrators 5 are arranged on the outer wall of the liquid drop feeder 4, the vibrators 5 are provided with two groups, the parameters of the vibrators 5 output to the two groups of vibrators 5 are different, and the two groups of vibrators 5 are respectively arranged on the outer wall of the liquid drop feeder 4.
The liquid is quantitatively delivered to the droplet feeder 4 through the droplet feeder 3, and is dropped out through the capillary end of the droplet feeder 4, thereby completing the feeding of the liquid.
The two sets of vibrators 5 are respectively arranged on the outer side of the liquid drop feeder 4 according to the up-down direction and are in contact with the outer side of the liquid drop feeder 4, vibration generated by the reciprocating action of the lower vibrators 5 is transmitted to the liquid drop feeder 4, the vibrator 5 above also corrects the moving distance of the end part of the liquid drop feeder through reciprocating movement, and the dropping work of micro liquid drops is completed under the combined action of the two vibrators 5, so that the design ensures the dropping stability of the liquid drops.
The liquid drop feeder 4 is internally provided with a capillary metal pipe and is a bent piezoelectric driven quantitative device, two groups of vibrators 5 are arranged on the outer side of the capillary metal pipe of the liquid drop feeder 4, and the two groups of vibrators 5 are required to complete reciprocating periodic movement, but the movement parameters are different and are respectively used for overcoming the surface tension of micro liquid drops and the falling range of the micro liquid drops. By the design, the requirement of micro-droplet dropping is met, and the controllability of the micro-droplet dropping range is also met.
The liquid drop batcher 3 is a batcher driven by piezoelectric ceramics, and adopts a bending piezoelectric batcher which is provided with a liquid inlet and a liquid outlet, wherein the liquid inlet is connected with the working liquid, the liquid outlet is connected with the liquid drop feeder 4, and the piezoelectric ceramics in the liquid drop batcher 3 can form reciprocating periodic motion according to set working parameters, so that the liquid is quantitatively conveyed to the liquid drop feeder 4. The bending type piezoelectric device is high in controllability, the controllable accuracy is nano-scale, and therefore the flow of micro liquid drops can be accurately quantified.
The liquid after quantitative treatment flows into the drip feeder 4, and forms capillary flow in the interior, so that the acting force of the micro liquid drops and the drip tube is reduced.
When the liquid drops flow out of the end of the capillary, the micro liquid drops cannot be formed to drop automatically due to the action of surface tension, the micro liquid drops can drop by overcoming the surface tension under the vibration action of the vibrator 5, the dropping range of the micro liquid drops is larger under the condition that a single vibrator 5 exists, and the use requirement cannot be met under many working conditions, so that the vibrator 5 is added, the dropping range of the liquid drops is corrected while the liquid drops are assisted to drop, and the dropping range of the micro liquid drops is controlled while the micro liquid drops are ensured to drop.
The power regulator 2 is a piezoelectric ceramic driving power supply of two paths of power supplies, and the two paths of power supplies are independently output according to different waveforms generated by the microcontroller 1. The power regulator 2 is driven by a waveform generated by the microcontroller 1.
The microcontroller 1 generates arbitrary waveforms. The microcontroller 1 generates different vibration parameters, driving two sets of vibrators 5, respectively. The microcontroller 1 adjusts the waveform frequency and amplitude used for driving the vibrator 5 according to the material characteristics and the feeding requirement of micro liquid drops, and the power regulator 2 respectively drives two paths of piezoelectric ceramic plates according to signals sent by the microcontroller 1. The different waveforms produce different effects and the effects applied in the present device are different.
The second embodiment is as follows: the present embodiment is described with reference to fig. 1, and the method for feeding piezo-electric droplets according to the present embodiment is implemented by means of a piezo-electric droplet feeding system according to the first embodiment, and includes the following steps:
step 1, initializing the micro control 1 and the power regulator 2;
step 2, connecting a liquid drop feeder 3 and a liquid drop feeder 4;
step 3, setting a slightly larger working parameter, starting a liquid drop quantitative device 4, and discharging air and impurities;
step 4, closing the liquid drop feeder 3 after the liquid at the outlet of the liquid drop feeder 4 stably flows out;
step 5, according to the material characteristics and feeding requirements, enabling the microcontroller 1 to respectively set working parameters of the two groups of vibrators 5, and simultaneously setting working parameters of the liquid drop quantifier 3;
and 6, starting the liquid drop quantification device 3, and simultaneously starting the vibrator 5 to finish feeding of micro liquid drops.
The calibration of the droplet dispenser 3 should be performed prior to use in a piezoelectric type micro droplet feeding system.
It should be noted that, in the above embodiments, as long as the technical solutions that are not contradictory can be arranged and combined, those skilled in the art can exhaust all the possibilities according to the mathematical knowledge of the arrangement and combination, so the present invention does not describe the technical solutions after the arrangement and combination one by one, but should be understood that the technical solutions after the arrangement and combination have been disclosed by the present invention.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A piezoelectric type micro-droplet feeding system, characterized in that: the device comprises a microcontroller (1), a power regulator (2), a liquid drop quantitative device (3), a liquid drop feeder (4) and a vibrator (5), wherein the microcontroller (1) regulates output power and waveforms, the output power and waveforms are output to the vibrator (5) after passing through the power regulator (2), the liquid drop quantitative device (3) is connected with the liquid drop feeder (4), liquid is quantitatively conveyed to the liquid drop feeder (4) through the liquid drop quantitative device (3), and the vibrator (5) is arranged on the outer wall of the liquid drop feeder (4).
2. A piezoelectric micro-droplet feeding system according to claim 1, wherein: the liquid drop feeder (4) is internally provided with a capillary metal tube.
3. A piezoelectric micro-droplet feeding system according to claim 2, wherein: the power regulator (2) is driven by a waveform generated by the microcontroller (1).
4. A piezoelectric micro-droplet feeding system according to claim 3, wherein: the microcontroller (1) generates arbitrary waveforms.
5. A piezoelectric micro-droplet feeding system according to claim 2, wherein: the vibrators (5) are arranged in two groups, and the two groups of vibrators (5) are respectively arranged on the outer wall of the liquid drop feeder (4).
6. A piezoelectric micro-droplet feeding system according to claim 4, wherein: the two groups of vibrators (5) are respectively arranged on the outer side of the droplet feeder (4) up and down and are in contact with the outer side of the droplet feeder (4).
7. The piezoelectric drip feed system of claim 6, wherein: the microcontroller (1) generates different vibration parameters and drives two groups of vibrators (5) respectively.
8. The piezoelectric drip feed system of claim 7, wherein: the liquid drop quantitative device (3) is a quantitative device driven by piezoelectric ceramics.
9. The piezoelectric drip feed system of claim 8, wherein: the power regulator (2) is a piezoelectric ceramic driving power supply of two paths of power supplies, and the two paths of power supplies are independently output according to different waveforms generated by the microcontroller (1).
10. A piezoelectric type micro-droplet feeding method realized by the piezoelectric type micro-droplet feeding system according to claim 9, comprising the following steps:
step 1, initializing the micro control (1) and the power regulator (2);
step 2, connecting a liquid drop quantitative device (3) and a liquid drop feeder (4);
step 3, setting working parameters and starting a liquid drop quantitative device (4) to discharge air and impurities;
step 4, closing the liquid drop quantitative device (3) after the liquid at the outlet of the liquid drop feeder (4) stably flows out;
step 5, according to the material characteristics and feeding requirements, enabling the microcontroller (1) to set working parameters of the two groups of vibrators (5) respectively, and simultaneously, setting working parameters of the liquid drop quantification device (3);
and 6, starting the liquid drop quantification device (3), and simultaneously starting the vibrator (5) to finish feeding the micro liquid drops.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311374175.4A CN117443475A (en) | 2023-10-23 | 2023-10-23 | Piezoelectric type micro-droplet feeding system and method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202311374175.4A CN117443475A (en) | 2023-10-23 | 2023-10-23 | Piezoelectric type micro-droplet feeding system and method |
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| CN117443475A true CN117443475A (en) | 2024-01-26 |
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Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20040084532A (en) * | 2003-03-28 | 2004-10-06 | 대한민국(서울대학교 총장) | Apparatus for generating droplet |
| US20070176958A1 (en) * | 2004-04-07 | 2007-08-02 | Anthony Hailes | Electronic drive system for a droplet spray generation device |
| JP2007301954A (en) * | 2006-05-15 | 2007-11-22 | Fuji Xerox Co Ltd | Droplet discharge device |
| WO2012099532A1 (en) * | 2011-01-17 | 2012-07-26 | Agency For Science, Technology And Research | Microfluidic droplet generator |
| JP2015107472A (en) * | 2013-12-05 | 2015-06-11 | 株式会社リコー | Liquid droplet discharge device and particle production device |
| CN105772129A (en) * | 2016-03-04 | 2016-07-20 | 上海理工大学 | Integrated microfluidic device and method for preparing microdroplets |
| US20200009571A1 (en) * | 2014-11-17 | 2020-01-09 | Institute Of Microbiology, Chinese Academy Of Sciences | Droplet generating apparatus, system |
| WO2022267672A1 (en) * | 2021-06-24 | 2022-12-29 | Beijing Zhiyu Biotechnology Ltd. | Droplet generation method, system and application |
| WO2023015758A1 (en) * | 2021-08-11 | 2023-02-16 | 北京慧智医疗器械有限公司 | System for implementing high-throughput integrated microdroplet digital pcr |
| US20230286007A1 (en) * | 2022-03-08 | 2023-09-14 | Seiko Epson Corporation | Liquid ejection device |
-
2023
- 2023-10-23 CN CN202311374175.4A patent/CN117443475A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20040084532A (en) * | 2003-03-28 | 2004-10-06 | 대한민국(서울대학교 총장) | Apparatus for generating droplet |
| US20070176958A1 (en) * | 2004-04-07 | 2007-08-02 | Anthony Hailes | Electronic drive system for a droplet spray generation device |
| JP2007301954A (en) * | 2006-05-15 | 2007-11-22 | Fuji Xerox Co Ltd | Droplet discharge device |
| WO2012099532A1 (en) * | 2011-01-17 | 2012-07-26 | Agency For Science, Technology And Research | Microfluidic droplet generator |
| JP2015107472A (en) * | 2013-12-05 | 2015-06-11 | 株式会社リコー | Liquid droplet discharge device and particle production device |
| US20200009571A1 (en) * | 2014-11-17 | 2020-01-09 | Institute Of Microbiology, Chinese Academy Of Sciences | Droplet generating apparatus, system |
| CN105772129A (en) * | 2016-03-04 | 2016-07-20 | 上海理工大学 | Integrated microfluidic device and method for preparing microdroplets |
| WO2022267672A1 (en) * | 2021-06-24 | 2022-12-29 | Beijing Zhiyu Biotechnology Ltd. | Droplet generation method, system and application |
| WO2023015758A1 (en) * | 2021-08-11 | 2023-02-16 | 北京慧智医疗器械有限公司 | System for implementing high-throughput integrated microdroplet digital pcr |
| US20230286007A1 (en) * | 2022-03-08 | 2023-09-14 | Seiko Epson Corporation | Liquid ejection device |
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