CN102778272A - Simple microbalance - Google Patents
Simple microbalance Download PDFInfo
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- CN102778272A CN102778272A CN2012102869898A CN201210286989A CN102778272A CN 102778272 A CN102778272 A CN 102778272A CN 2012102869898 A CN2012102869898 A CN 2012102869898A CN 201210286989 A CN201210286989 A CN 201210286989A CN 102778272 A CN102778272 A CN 102778272A
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Abstract
The invention discloses a simple microbalance which comprises a balance moving coil supporting part and a conversion display circuit, wherein the balance moving coil supporting part comprises a balance disc, a moving coil meter, a weighing moment arm and a balance indication arm; and the conversion display circuit comprises a moving coil current balancer, a current-to-voltage converter, an adjustable potentiometer, a digital display and a power supply. The simple microbalance disclosed by the invention has the advantages of simple structure, convenience in operation, small measurement error, high sensitivity and little ambient temperature influence, is capable of displaying the minimum weight of 0.001 microgramme, and is very suitable for microanalysis.
Description
Technical field
The present invention relates to a kind of balance, be specifically related to a kind of simple and easy microbalance, belong to field of measuring techniques.
Background technology
In qualimetry, balance is important measurement instrument, passes to daily value from the amount of mete-wand and measures, and all must weigh with balance, and it is not only closely related with daily life, has also made indelible contribution for the reach of science.Up to now, people are also constantly studying balance, by means of modern means, improve the various performances of balance, to satisfy the needs of people's scientific research and daily life.Yet; Along with the reach of science; The progress of society, people are more and more high to the requirement of qualimetric precision and sensitivity and comfort level thereof etc., meanwhile; People also have to develop the quality measuring instrument that is suitable for various demands of different and different occasions, like traditional balance, hot analytical balance etc.
At present, though most mechanical balances can reach the higher precision and the range of weighing of broad, seldom can realize the weighing of Gamma Magnitude object; And measuring repeatability and accuracy are not high; Sensitivity is not high yet, and influenced by ambient temperature bigger, some operates cumbersome; Especially in the laboratory, carry out microanalysis, traditional mechanical balance is inadequate especially.
Summary of the invention
To the demand; The invention provides a kind of simple and easy microbalance, this microbalance is simple in structure, easy to operate, has the advantage that measuring error is little, highly sensitive, ambient temperature effect is little; Can show the weighing of minimum 0.001 microgram, be fit to very much do the usefulness of microanalysis.
The present invention is a kind of simple and easy microbalance; This microbalance is made up of balance moving-coil supporting part and conversion display circuit two parts; Described balance moving-coil supporting part comprises pan of a steelyard, moving-coil instrument, title material resources moment arm and balance indication arm, and described conversion display circuit comprises moving-coil current balancing device, current-to-voltage convertor, adjustable potentiometer, digital indicator and power supply.
In the present invention's one preferred embodiment; Described moving-coil instrument is made up of permanent magnet, moving-coil, instrument; This moving-coil instrument is in the magnetic field that a permanent magnet forms, to place a rotary coil, flows through the electric current and the magnetic field interaction of coil, on two vertical edges of moving-coil, has produced electromagnetic force; And make rotation axis produce torque, make moving-coil produce deflection.
In the present invention's one preferred embodiment; The pull spring of described moving-coil is a bronze material; Become rectangle, holding capacity is bigger, when the deflecting torque that the moment of reaction that exists in this moving-coil and moving-coil electric current produce balances each other; Just deflection stably is in a certain angle for moving-coil, and the gauge pointer that is fixed on the moving-coil can stably be indicated the position at a certain scale.
In the present invention's one preferred embodiment, described title material resources moment arm and balance indication arm are positioned at the both sides of moving-coil, wherein, claim that the material resources moment arm connects title thing dish, and this claims that the material resources moment arm adopts hardness phosphor bronze wire preferably; Balance indication arm adopts the capillary straight glass tube of diameter less than lmm, and tube head forms needlepoint form, to do balance indication at zero point.
In the present invention's one preferred embodiment, the course of work of described conversion display circuit is: after putting into object in the balance pan of a steelyard, the weight of object is sunk an end of scale pan; At this moment; In the moving-coil current balancing device, inject the reverse balanced balanced current that can regulate continuously, it can make the balance arm of balance produce an opposing torque, thereby pan of a steelyard is lifted again; Get back to reference position; The indication end points to zero point again, and this reverse balanced balanced current numerical value is promptly represented the weight of object, just can on digital indicator, demonstrate the actual weight of object through the current-to-voltage convertor conversion.
The present invention has disclosed a kind of simple and easy microbalance, and this microbalance is simple in structure, easy to operate, has the advantage that measuring error is little, highly sensitive, ambient temperature effect is little, can show the weighing of minimum 0.001 microgram, is fit to very much do the usefulness of microanalysis.
Description of drawings
Fig. 1 is the conversion display circuit schematic diagram of the simple and easy microbalance of the embodiment of the invention.
Embodiment
Below in conjunction with accompanying drawing preferred embodiment of the present invention is set forth in detail, thereby protection scope of the present invention is made more explicit defining so that advantage of the present invention and characteristic can be easier to it will be appreciated by those skilled in the art that.
Fig. 1 is the conversion display circuit schematic diagram of the simple and easy microbalance of the embodiment of the invention; This microbalance is made up of balance moving-coil supporting part and conversion display circuit two parts; Described balance moving-coil supporting part comprises pan of a steelyard, moving-coil instrument, title material resources moment arm and balance indication arm, and described conversion display circuit comprises moving-coil current balancing device, current-to-voltage convertor, adjustable potentiometer, digital indicator and power supply.
The moving-coil instrument of the simple and easy microbalance that the present invention mentions is made up of permanent magnet, moving-coil, instrument; This moving-coil instrument is in the magnetic field that a permanent magnet forms, to place a rotary coil; Flow through the electric current and the magnetic field interaction of coil, on two vertical edges of moving-coil, produced electromagnetic force, this is the power of a pair of opposite sign but equal magnitude; And make rotation axis produce torque, make moving-coil produce deflection; The pull spring of this moving-coil is a bronze material; Become rectangle, holding capacity is bigger, and the deflecting torque of moving-coil is directly proportional with the electric current that flows through moving-coil; And only exist the moment of reaction that pull spring or hairspring produced in the moving-coil; When the deflecting torque of the moment of reaction and the generation of moving-coil electric current balanced each other, just deflection stably was in a certain angle for moving-coil, and the gauge pointer that is fixed on the moving-coil can stably be indicated the position at a certain scale.
The title material resources moment arm of this simple and easy microbalance and balance indication arm are positioned at the both sides of moving-coil, wherein, claim that the material resources moment arm connects title thing dish, and this claims that the material resources moment arm adopts hardness phosphor bronze wire preferably; Balance indication arm adopts the capillary straight glass tube of diameter less than lmm, and tube head forms needlepoint form, to do balance indication at zero point; Usually claim that material resources moment arm and balance indication arm is long more, the precision of its weighing indication and sensitivity are also just high more, but length is limited, because receive the restriction of instrument integral body and balanced support; The range of weighing of this microbalance is 0～1 milligram, and minimum demonstration number is 0.001 milligram.
During actual measurement, after putting into object in the balance pan of a steelyard, the weight of object is sunk an end of scale pan; At this moment, in the moving-coil current balancing device, inject the reverse balanced balanced current that can regulate continuously, it can make the balance arm of balance produce an opposing torque; Thereby pan of a steelyard is lifted again, get back to reference position, the indication end points to zero point again; When this is equivalent to the mechanical balance weighing; After wanting balance to add object, cause that side's pan of a steelyard sinks,, make the balance indication get back to zero equally so need in another pan of a steelyard, to add the counterweight with the suitable weight of object.Because the weight of reverse balanced balanced current and object is linear,, can directly demonstrate the actual weight of object by digital indicator then so the numerical value of reverse balanced balanced current converts voltage to through current-to-voltage convertor.
The present invention has disclosed a kind of simple and easy microbalance, and this microbalance is simple in structure, easy to operate, has the advantage that measuring error is little, highly sensitive, ambient temperature effect is little, can show the weighing of minimum 0.001 microgram, is fit to very much do the usefulness of microanalysis.
The above; Be merely embodiment of the present invention; But protection scope of the present invention is not limited thereto; Any those of ordinary skill in the art are in the technical scope that the present invention disclosed, and variation or the replacement that can expect without creative work all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain that claims were limited.
Claims (5)
1. simple and easy microbalance; It is characterized in that; This microbalance is made up of balance moving-coil supporting part and conversion display circuit two parts; Described balance moving-coil supporting part comprises pan of a steelyard, moving-coil instrument, title material resources moment arm and balance indication arm, and described conversion display circuit comprises moving-coil current balancing device, current-to-voltage convertor, adjustable potentiometer, digital indicator and power supply.
2. simple and easy microbalance according to claim 1; It is characterized in that described moving-coil instrument is made up of permanent magnet, moving-coil, instrument, this moving-coil instrument is in the magnetic field that a permanent magnet forms, to place a rotary coil; Flow through the electric current and the magnetic field interaction of coil; On two vertical edges of moving-coil, produced electromagnetic force, and made rotation axis produce torque, made moving-coil produce deflection.
3. simple and easy microbalance according to claim 2; It is characterized in that the pull spring of described moving-coil is a bronze material, become rectangle; Holding capacity is bigger; When the deflecting torque that the moment of reaction that exists in this moving-coil and moving-coil electric current produce balanced each other, just deflection stably was in a certain angle for moving-coil, and the gauge pointer that is fixed on the moving-coil can stably be indicated the position at a certain scale.
4. simple and easy microbalance according to claim 1 is characterized in that, described title material resources moment arm and balance indication arm are positioned at the both sides of moving-coil, wherein, claims that the material resources moment arm connects title thing dish, and this claims that the material resources moment arm adopts hardness phosphor bronze wire preferably; Balance indication arm adopts the capillary straight glass tube of diameter less than lmm, and tube head forms needlepoint form, to do balance indication at zero point.
5. simple and easy microbalance according to claim 1 is characterized in that, the course of work of described conversion display circuit is: after putting into object in the balance pan of a steelyard; The weight of object is sunk an end of scale pan, at this moment, in the moving-coil current balancing device, injects the reverse balanced balanced current that can regulate continuously; It can make the balance arm of balance produce an opposing torque; Thereby pan of a steelyard is lifted again, get back to reference position, the indication end points to zero point again; This reverse balanced balanced current numerical value is promptly represented the weight of object, just can on digital indicator, demonstrate the actual weight of object through the current-to-voltage convertor conversion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102869898A CN102778272A (en) | 2012-08-14 | 2012-08-14 | Simple microbalance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102869898A CN102778272A (en) | 2012-08-14 | 2012-08-14 | Simple microbalance |
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|---|---|
| CN102778272A true CN102778272A (en) | 2012-11-14 |
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| CN2012102869898A Pending CN102778272A (en) | 2012-08-14 | 2012-08-14 | Simple microbalance |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104061986A (en) * | 2013-03-22 | 2014-09-24 | 深圳市海洋王照明工程有限公司 | Balance circuit |
| CN111721657A (en) * | 2019-03-22 | 2020-09-29 | 北京恒久实验设备有限公司 | Array type magnetic core arrangement structure of analytical instrument |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE914445C (en) * | 1943-11-28 | 1954-07-01 | Theodor Gast Dr Ing | A registering torsion balance with electrical compensation |
| US3305035A (en) * | 1964-08-31 | 1967-02-21 | Sartorius Werke Und Vormals Go | Electrical weigh scale with moving-coil detector |
| US4024472A (en) * | 1974-08-02 | 1977-05-17 | Weston Instruments, Inc. | Meter construction |
| CN2336346Y (en) * | 1998-03-18 | 1999-09-01 | 王虹 | Electromagnetic force balanced electronic scale and accounting scale |
| CN1544887A (en) * | 2003-11-25 | 2004-11-10 | 华中科技大学 | Digital display recorder with indication by needle pointer |
-
2012
- 2012-08-14 CN CN2012102869898A patent/CN102778272A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE914445C (en) * | 1943-11-28 | 1954-07-01 | Theodor Gast Dr Ing | A registering torsion balance with electrical compensation |
| US3305035A (en) * | 1964-08-31 | 1967-02-21 | Sartorius Werke Und Vormals Go | Electrical weigh scale with moving-coil detector |
| US4024472A (en) * | 1974-08-02 | 1977-05-17 | Weston Instruments, Inc. | Meter construction |
| CN2336346Y (en) * | 1998-03-18 | 1999-09-01 | 王虹 | Electromagnetic force balanced electronic scale and accounting scale |
| CN1544887A (en) * | 2003-11-25 | 2004-11-10 | 华中科技大学 | Digital display recorder with indication by needle pointer |
Non-Patent Citations (1)
| Title |
|---|
| 路自强: "测量仪表用铂基合金张丝材料的应用现状", 《电测与仪表》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104061986A (en) * | 2013-03-22 | 2014-09-24 | 深圳市海洋王照明工程有限公司 | Balance circuit |
| CN104061986B (en) * | 2013-03-22 | 2016-04-13 | 深圳市海洋王照明工程有限公司 | Balance circuit |
| CN111721657A (en) * | 2019-03-22 | 2020-09-29 | 北京恒久实验设备有限公司 | Array type magnetic core arrangement structure of analytical instrument |
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Application publication date: 20121114 |