CN202113818U - High-precision low-speed stirring control device - Google Patents
High-precision low-speed stirring control device Download PDFInfo
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- CN202113818U CN202113818U CN2011201419372U CN201120141937U CN202113818U CN 202113818 U CN202113818 U CN 202113818U CN 2011201419372 U CN2011201419372 U CN 2011201419372U CN 201120141937 U CN201120141937 U CN 201120141937U CN 202113818 U CN202113818 U CN 202113818U
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Abstract
The utility model provides a high-precision low-speed stirring control device, which is used for controlling a stirring device and comprises a power supply unit, a control unit, an interaction interface unit, an input/output unit and a plurality of motor driving units, wherein the power supply unit, the interaction interface unit and the input/output unit are respectively connected with the control unit, and the motor driving units are respectively connected with the control unit and then connected to a motor in the stirring device. By the aid of high precision of the stepping motor and the pulse frequency of a controller, a special driver matched with the stepping motor is controlled to drive the stepping motor, so that control and reproducibility of stirring rotational speed within +/-1RPM (revolutions per minute) of a set value are realized, precision requirements on rotational speed difference among different motors are met, and the technical problem of low rotational speed precision of an existing magnetic stirring device is solved.
Description
Technical field
The utility model relates to a kind of experiment apparatus of electromechanical integration, relates in particular to a kind of high-precision stirring at low speed control device.
Background technology
In chemistry and Bioexperiment process, often can use stirring system, comprise stirrer, motor and controller in stirred vessel, the stirred vessel, motor provides kinetic energy to stirrer, so that it stirs the liquid in the stirred vessel in stirred vessel.What often use at present is magnetic stirring apparatus.Magnetic stirring apparatus is to produce rotating excitation field by micro motor for driving magnet to drive the stirrer rotation in the container; To reach solution is stirred; Make solution obtain the good heat transfer mass transfer condition; In the temperature of setting, obtain uniformly sufficient hybrid reaction, so can be widely used in fields such as biology, medicine, chemistry, chemical industry.
But the common range of speeds of present magnetic agitation is up to about 2000PRM, and control accuracy, the reappearance precision of its rotating speed under low speed (5-250PRM) service condition are all undesirable.
The utility model content
To above-mentioned defective, the purpose of the utility model provides a kind of high-precision stirring at low speed control device low in calories, to solve the not high technical problem of rotary speed precision of existing magnetic stirring apparatus.
For realizing above-mentioned purpose, the utility model has adopted following technical scheme:
A kind of high-precision stirring at low speed control device; Be used to control agitating device; Comprise power supply unit, control module, interactive interface unit and I/O unit, power supply unit, interactive interface unit and I/O unit are connected with said control module respectively, also comprise some electric-motor drive units; Some electric-motor drive units are connected with control module respectively, and electric-motor drive unit is connected to the motor in the agitating device again.
Preferably, said I/O unit comprises a text display, and said text display is connected through the Serial Port Line that intersects with said control module.
Preferably, said control module is connected through single line with said electric-motor drive unit.
Preferably, said control module comprises controller, and said controller sends digit pulse to electric-motor drive unit.
Preferably, said electric-motor drive unit is a stepper motor driver, and the motor that is connected with said stepper motor driver is a stepper motor.
Preferably, said power supply unit is power supply or power supply plug.
Owing to adopted above technical scheme, make the utility model compare prior art, have following advantage and good effect:
Pulse and stepper motor special purpose driver that this device adopts the high accuracy stepper motor and combines controller to send can realize the accurate control of setting.And when comprising 2 covers and above stirring motor in a whole set of agitating device, the mutual same ability of speed discrepancy of stirring motor is precisely controlled, realizes high-precision stirring system.
Description of drawings
Fig. 1 is a kind of structural representation of high-precision stirring at low speed control device.
The specific embodiment
Below in conjunction with accompanying drawing, specify the utility model.
See also Fig. 1; The stirring control device of the utility model comprises power supply unit 25, control module 22, interactive interface unit 21 and I/O unit 23; Power supply unit 25,22 draws of interactive interface unit, I/O unit 23 is connected with control module 25 respectively.In the present embodiment, power supply unit 22 can be the power supply that directly can supply power, also can be attaching plug, is connected with power supply to obtain electric energy through this attaching plug; Control module 22 is a controller, and controller can send digital pulse signal; I/O unit 23 is a text display, and text display is connected through the Serial Port Line that intersects with control module 22, employing be the MODBUS rtu protocol.
Stir startup frequency that any No. one motor can be set respectively on the text display of control device, quicken frequency, maximum (top) speed, on text, can show the speed of service of each spindle motor simultaneously, can control the startup of each spindle motor respectively and stop.
On controller, also connect some electric-motor drive units 24; Each electric-motor drive unit 24 connects a motor 13; In the present embodiment; Electric-motor drive unit 24 is a stepper motor driver, and each stepper motor driver also connects a stepper motor, and controller is connected through single line with the stepper motor driver on each road.
Stirring control device is connected with agitating device; Stir control device and can adopt flat cable to be connected with agitating device, agitating device lower cover side is provided with an interactive interface, stirs on the control device interactive interface module 21 also is set; Flat cable one end is positioned at the interactive interface on the agitating device; One end is positioned at the interactive interface module 21 that stirs on the control device, at this moment, has just accomplished agitating device and has stirred the action that control device is connected.In the present embodiment; The about 1-2mm of flat cable thickness; In the time of in agitating device is placed on like the closed environment of incubator etc.,, make things convenient for the door on the incubator etc. to close because the thickness of flat cable is smaller; Help improving the seal of door, reach the service condition (like temperature, gas concentration etc.) that accurately controls environment.
Stepper motor is the open loop control element that electric impulse signal is changed into angular displacement or displacement of the lines.Under the situation of non-overload, the frequency and the umber of pulse of pulse signal are only depended in rotating speed of motor, the position that stops, and do not receive the influence of load variations.
When step actuator receives a pulse signal that is sent by controller, rotate a fixing angle with regard to drive stepping motor by the direction of setting, be called " step angle ".Its rotation is to move step by step with fixing angle.Can come the pilot angle displacement through the control impuls number, thereby reach the purpose of accurate location; Can control speed and the acceleration that motor rotates through the control impuls frequency simultaneously, thereby reach the purpose of speed governing.After adopting the segmentation function, driver can be decomposed into corresponding segmentation number drive stepping motor rotation with each stepping angle.
Segmentation number like driver is N, and the stepping angle of stepper motor is α, the speed of the corresponding motor operation of the frequency of pulse.The segmentation number of the pulse number that controller sends, driver and the relation of the motor shaft anglec of rotation are:
M?=?N×360°/?α°
In the formula:
M ---the pulse number that controller sends,
N ---the segmentation number of driver,
α ---the stepping angle of stepper motor.
Adopt 4 segmentations like stepper motor driver, the step angle of motor is 1.8 degree, and the corresponding pulse number of motor operation one circle is 4 * 360 °/1.8 °=800 so.
This shows that corresponding four subdivision drivers, stepping angle are 1.8 ° stepper motor, controller can reach 1.8 °/360 °/4=0.00125 circle/pulse in theory to the control accuracy of motor
Through the control impuls frequency, can control rotating speed of motor, thereby reach the purpose of speed governing.
For example; Rotating speed as the motor output 250RPM that needs agitating device; Input speed setting value 250RPM on text display at first, controller obtain this instruction back through built-in sequential operation, and the frequency signal of 250 * 800=200000 pulses per minute of output is to stepper motor driver; The rotating speed of drive stepping motor output=200000*0.00125=250RPM drives stirrer and rotates with same rotating speed again.
Based on above-mentioned principle, make the reappearance of speed of agitator also be guaranteed, help the mutual comparison of course of reaction.Likewise, when comprising 2 covers and above stirring motor in a whole set of agitating device, the mutual speed discrepancy of stirring motor equally can be precisely controlled so that experiment compare.
The utility model utilizes the high accuracy characteristic of stepper motor; And combine supporting digital type pulse signal generator and stepper motor special purpose driver, with realize speed of agitator setting value ± 1RPM is with the required precision of the speed difference between interior control, reappearance and the different motor.
More than disclosed only be the preferred embodiment of the utility model; But be not to be used for limiting itself, anyly have the knack of those skilled in the art, under the situation of the utility model spiritual connotation; The equalization of being done changes and changes, and all should drop in the protection domain of the utility model.
Claims (6)
1. high-precision stirring at low speed control device; Be used to control agitating device, comprise power supply unit, control module, interactive interface unit and I/O unit, power supply unit, interactive interface unit and I/O unit are connected with said control module respectively; It is characterized in that; Also comprise some electric-motor drive units, some electric-motor drive units are connected with control module respectively, and electric-motor drive unit is connected to the motor in the agitating device again.
2. high-precision stirring at low speed control device as claimed in claim 1 is characterized in that said I/O unit comprises a text display, and said text display is connected through the Serial Port Line that intersects with said control module.
3. high-precision stirring at low speed control device as claimed in claim 1 is characterized in that said control module is connected through single line with said electric-motor drive unit.
4. high-precision stirring at low speed control device as claimed in claim 1 is characterized in that said control module comprises controller, and said controller sends digit pulse to electric-motor drive unit.
5. high-precision stirring at low speed control device as claimed in claim 1 is characterized in that said electric-motor drive unit is a stepper motor driver, and the motor that is connected with said stepper motor driver is a stepper motor.
6. high-precision stirring at low speed control device as claimed in claim 1 is characterized in that, said power supply unit is power supply or power supply plug.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201419372U CN202113818U (en) | 2011-05-06 | 2011-05-06 | High-precision low-speed stirring control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201419372U CN202113818U (en) | 2011-05-06 | 2011-05-06 | High-precision low-speed stirring control device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202113818U true CN202113818U (en) | 2012-01-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201419372U Expired - Fee Related CN202113818U (en) | 2011-05-06 | 2011-05-06 | High-precision low-speed stirring control device |
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| Country | Link |
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| CN (1) | CN202113818U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103064439A (en) * | 2012-12-27 | 2013-04-24 | 中冶长天国际工程有限责任公司 | Control method and device of mixing machine |
| CN104624117A (en) * | 2015-01-13 | 2015-05-20 | 中铝广西有色金源稀土股份有限公司 | Passive automatic detection system and method for stirring production line |
-
2011
- 2011-05-06 CN CN2011201419372U patent/CN202113818U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103064439A (en) * | 2012-12-27 | 2013-04-24 | 中冶长天国际工程有限责任公司 | Control method and device of mixing machine |
| CN103064439B (en) * | 2012-12-27 | 2015-03-11 | 中冶长天国际工程有限责任公司 | Control method and device of mixing machine |
| CN104624117A (en) * | 2015-01-13 | 2015-05-20 | 中铝广西有色金源稀土股份有限公司 | Passive automatic detection system and method for stirring production line |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120118 Termination date: 20170506 |
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| CF01 | Termination of patent right due to non-payment of annual fee |