CN201519564U - Ultrathin digital-display magnetic stirrer - Google Patents
Ultrathin digital-display magnetic stirrer Download PDFInfo
- Publication number
- CN201519564U CN201519564U CN2009200979026U CN200920097902U CN201519564U CN 201519564 U CN201519564 U CN 201519564U CN 2009200979026 U CN2009200979026 U CN 2009200979026U CN 200920097902 U CN200920097902 U CN 200920097902U CN 201519564 U CN201519564 U CN 201519564U
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- chip microcomputer
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Abstract
The utility model discloses an ultrathin digital-display magnetic stirrer. In four coils which are symmetrically distributed on the circumference and under a state of being electrified with direct currents, the polarities of the magnetic poles of two adjacent coils are the same and opposite to that of another two adjacent coils, and then the directions of direct currents of all opposite coils are changed alternately in sequence; the upper surface of each coil is provided with a magnetic pole piece; the longitudinal axes of opposite magnetic pole pieces intersect horizontally; and a container placing mark of an upper panel on the shell corresponds to a rotating magnetic field generated by the four coils. The polarities of the magnetic poles of the four coils change regularly to generate the rotating magnetic filed which completely can drive a magnetic stirring bar inside a container to rotate, thus achieving the purpose of stirring. A magnetic driving mechanism for the magnetic stirring bar of the magnetic stirrer is driven by a rotating magnetic field motor generated by each coil and the shell is only 25mm in height. Obviously, the ultrathin digital-display magnetic stirrer has the outstanding advantages of small volume, no wear, no noise, long service life, relatively stronger vibration resistance, visual display of the number of rotation of the rotating magnetic field, and convenient use.
Description
Technical field
The utility model belongs to test apparatus, particularly relates to a kind of ultra-thin digital display magnetic stirring apparatus.
Background technology
The thickness of existing magnetic stirring apparatus is bigger, and its reason is that the magnetically-actuated mechanism of agitator magnetic stirrer is that magnet by motor, the magnet supporting plate that is installed on electric machine main shaft and this gripper shoe symmetry two ends constitutes.The magnetically-actuated mechanism of above-mentioned agitator exist volume big, wearing and tearing are arranged, the life-span is short and the relatively poor defective of anti-vibration ability.
Summary of the invention
The utility model is to have the above-mentioned technical problem that magnetic stirring apparatus exists now in order to solve, and a kind of ultra-thin digital display magnetic stirring apparatus is provided.
The utility model is taked following technical scheme for achieving the above object: this ultra-thin digital display magnetic stirring apparatus is by housing, sign placed by container and mixing speed adjustment knob is formed, feature is, be provided with four coils that circumference is symmetrically distributed in the housing, the axis of each coil is parallel and perpendicular to the housing top panel, the pole polarity pole polarity identical and adjacent two coils with another that pass to next adjacent two coil of DC current state are opposite, thereafter each relative coil alternately changes the DC current direction successively, the upper surface of each coil is respectively equipped with the pole piece of symmetry, corresponding pole piece longitudinal axis level intersects, its intersection point is corresponding with the center that the container of housing top panel is placed sign, described four coils are respectively equipped with the dual H-bridge drive circuit, the corresponding respectively control end that is connected in each dual H-bridge drive circuit of each PWM output of single-chip microcomputer in the housing, one I/O mouth of single-chip microcomputer is connected with the potentiometer of adjusting the PWM square width, this potentiometer is provided with the mixing speed that is positioned at surface of shell and adjusts knob, and another I/O mouth is connected in the rotating excitation field revolution digital display of surface of shell via decoder driver.
The utility model can also be taked following technical measures:
Described single-chip microcomputer and each dual H-bridge drive circuit are provided with external shared rectifier power source.
The beneficial effects of the utility model and advantage are: each dual H-bridge drive circuit of four coils of this ultra-thin digital display magnetic stirring apparatus is controlled respectively by each PWM output of single-chip microcomputer, the pole polarity rule of four coils is changed and produce rotating excitation field, this rotating excitation field is enough to drive the magnetic stirrer rotation in the container and reaches the purpose of stirring.The magnetically-actuated mechanism of this agitator magnetic stirrer is driven by the rotary magnetic field motor that each coil produces, and the housing height only has 25mm.Obviously, this ultra-thin magnetic stirring apparatus has that little, the no wearing and tearing of volume, noiseless, life-span are long, the anti-vibration ability shows the rotating excitation field revolution more by force and intuitively and the outstanding advantage of convenient use.
Description of drawings
Accompanying drawing 2 is that Figure 1A is to view.
Accompanying drawing 3 is Fig. 2 part section structural representations.
Accompanying drawing 4 is Fig. 1 embodiment electricity theory diagrams.
Number in the figure: 1 housing, the 1-1 top panel, 2 mixing speeds are adjusted knob, 3 digital displays, 4 containers are placed sign, 5 external shared rectifier power source sockets, 6 gripper shoes, 7 coils, 8 pole pieces, 9 conducting magnetic columns, 10 potentiometers, 11 circuit boards.
The specific embodiment
Further specify the utility model below in conjunction with embodiment and accompanying drawing thereof.
Embodiment as shown in Figure 1, 2, 3, gripper shoe 6 in the housing 1 of this ultra-thin magnetic stirring apparatus is provided with four coils 7 that are symmetrically distributed by conducting magnetic column 9 fixing also circumference, the axis of each coil is parallel and perpendicular to housing top panel 1-1, the upper surface of each coil is respectively equipped with the pole piece 8 of symmetry, corresponding pole piece longitudinal axis level intersects, and its intersection point is corresponding with the center that the container of housing top panel is placed sign 4.The housing front panel is provided with the digital display 3 that mixing speed is adjusted knob 2 and rotating excitation field revolution.The housing rear board is provided with external shared rectifier power source socket 5.
Shown in Fig. 3,4, the driving module that circuit board 11 in the housing is provided with single-chip microcomputer and is made of a plurality of dual H-bridge integrated circuit L298, each PWM output of single-chip microcomputer is connected to the control input end that drives each dual H-bridge drive circuit of module, and the control output end of each dual H-bridge drive circuit connects four coils respectively.One I/O mouth of single-chip microcomputer is connected with the potentiometer 10 of adjusting the PWM square width, and this potentiometer is provided with the mixing speed that is positioned at the housing front panel and adjusts knob 2.Another I/O mouth of single-chip microcomputer is connected in the revolution display via decoder driver, and this display shows the revolution of rotating excitation field.
As shown in Figure 5, each PWM of single-chip microcomputer pole polarity (S) that to make adjacent loop A identical with coil B pole polarity (N) and adjacent two coils with another be coil C and coil D is opposite.If power up moment loop A to the pole polarity of coil D shown in Fig. 5 a, thereafter each relative coil such as loop A and coil C or coil B and coil D alternately change the DC current direction successively under the effect of PWM, the pole polarity that is each coil is by corresponding change shown in Fig. 5 b, Fig. 5 c, Fig. 5 d, and its result makes each pole piece 7 form rotating excitation field.Magnetic stirrer in the container can at the uniform velocity rotate under the rotating excitation field effect.Can adjust the square width of PWM by the potentiometer 9 of Fig. 1, can change mixing speed, and show mixing speeds from the digital display 3 of Fig. 1.
Claims (2)
1. ultra-thin digital display magnetic stirring apparatus, by housing, sign placed by container and mixing speed adjustment knob is formed, it is characterized in that: be provided with four coils that circumference is symmetrically distributed in the housing, the axis of each coil is parallel and perpendicular to the housing top panel, the pole polarity pole polarity identical and adjacent two coils with another that pass to next adjacent two coil of DC current state are opposite, thereafter each relative coil alternately changes the DC current direction successively, the upper surface of each coil is respectively equipped with the pole piece of symmetry, corresponding pole piece longitudinal axis level intersects, its intersection point is corresponding with the center that the container of housing top panel is placed sign, described four coils are respectively equipped with the dual H-bridge drive circuit, the corresponding respectively control end that is connected in each dual H-bridge drive circuit of each PWM output of single-chip microcomputer in the housing, one I/O mouth of single-chip microcomputer is connected with the potentiometer of adjusting the PWM width, this potentiometer is provided with the mixing speed that is positioned at surface of shell and adjusts knob, and another I/O mouth is connected in the rotating excitation field revolution digital display of surface of shell via decoder driver.
2. ultra-thin digital display magnetic stirring apparatus according to claim 1 is characterized in that: described single-chip microcomputer and each dual H-bridge drive circuit are provided with external shared rectifier power source.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200979026U CN201519564U (en) | 2009-07-23 | 2009-07-23 | Ultrathin digital-display magnetic stirrer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200979026U CN201519564U (en) | 2009-07-23 | 2009-07-23 | Ultrathin digital-display magnetic stirrer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201519564U true CN201519564U (en) | 2010-07-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009200979026U Expired - Fee Related CN201519564U (en) | 2009-07-23 | 2009-07-23 | Ultrathin digital-display magnetic stirrer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201519564U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102800226A (en) * | 2012-07-10 | 2012-11-28 | 沈阳大学 | Digital display temperature resistance magnetic force heating stirrer for experiment |
| CN104826533A (en) * | 2015-05-11 | 2015-08-12 | 兰州大学 | Combinable annular three-dimensional magnetic stirring apparatus |
-
2009
- 2009-07-23 CN CN2009200979026U patent/CN201519564U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102800226A (en) * | 2012-07-10 | 2012-11-28 | 沈阳大学 | Digital display temperature resistance magnetic force heating stirrer for experiment |
| CN104826533A (en) * | 2015-05-11 | 2015-08-12 | 兰州大学 | Combinable annular three-dimensional magnetic stirring apparatus |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100707 Termination date: 20110723 |