CN204787807U - Heating, dual -purpose electric stove of excitation - Google Patents
Heating, dual -purpose electric stove of excitation Download PDFInfo
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- CN204787807U CN204787807U CN201520468999.2U CN201520468999U CN204787807U CN 204787807 U CN204787807 U CN 204787807U CN 201520468999 U CN201520468999 U CN 201520468999U CN 204787807 U CN204787807 U CN 204787807U
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- heating
- excitation
- electric stove
- electric furnace
- metallic rod
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 34
- 230000005284 excitation Effects 0.000 title claims abstract description 29
- 230000009977 dual effect Effects 0.000 title abstract 3
- 239000010445 mica Substances 0.000 claims description 3
- 229910052618 mica group Inorganic materials 0.000 claims description 3
- 238000005259 measurement Methods 0.000 abstract description 14
- 239000002184 metal Substances 0.000 abstract description 8
- 238000011161 development Methods 0.000 abstract 1
- 230000018109 developmental process Effects 0.000 abstract 1
- 230000003068 static effect Effects 0.000 abstract 1
- 230000003287 optical effect Effects 0.000 description 13
- 238000000034 method Methods 0.000 description 12
- 239000011521 glass Substances 0.000 description 8
- 238000002474 experimental method Methods 0.000 description 6
- 239000000725 suspension Substances 0.000 description 4
- 230000001105 regulatory effect Effects 0.000 description 3
- 238000004904 shortening Methods 0.000 description 3
- 230000005611 electricity Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000009747 swallowing Effects 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
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Abstract
The utility model relates to a heating, dual -purpose electric stove of excitation is equipped with a portable kicking block in this electric stove, the metal pole that awaits measuring can place in in the electric stove, when metal pole length changed along with temperature or magnetic field intensity, portable kicking block can support the one end of metal pole live, still be equipped with the excitation coil who is used for producing magnetic field in the electric stove, be equipped with the heating coil that can be used for to the electric stove heating in the excitation coil. The utility model discloses a heating, dual -purpose electric stove of excitation utilizes change over switch to switch heating or excitation, when heating coil switches on, and the electric stove heating, when excitation coil switches on, can produce a stronger magnetic field in the electric stove, when whole coils are switched on, when can produce a magnetic field in the electric stove, also can temperature regulation. The utility model discloses a but developments, static magnetic measurement can be carried out in the heating function of electric stove and excitation function exclusive use, the use simultaneously that does.
Description
Technical field
The utility model relates to technical field of physical experiment, particularly one heating, the dual-purpose electric furnace of excitation.
Background technology
When magnetic material is magnetized, will there is small change (elongating or shortening) in the length of its all directions, this phenomenon is called magnetostriction.The magnetostrictive deformation of length of different magnetisable materials is different, usually characterizes with magnetostriction coefficient λ, namely
magnetostriction coefficient λ can characterize the size of deformation.Wherein, L is the length of metallic rod, and △ L is the length variations amount of metallic rod.λ >0 represents elongation, and namely λ <0 represents shortening, and λ=0 represents constant.The size of magnetostriction coefficient λ is roughly 10
-6~ 10
-3in scope.
The relation of magnetostriction coefficient and external magnetic field, common-used formula:
λ＝f(H)(1)
Describe.In formula (1), λ is magnetostriction coefficient, and H is the magnetic field intensity of externally-applied magnetic field, and unit is Am
-1.External magnetic field produces by by solenoidal electric current, and its size is:
H＝k
0I(2)
K in formula (2)
0for proportionality constant, relevant with factors such as solenoidal structure, physical dimensions, unit is m
-1.
In addition, in prior art when measuring change, optical lever method or interferometric method generally can be utilized to measure.
As illustrated in fig. 1 and 2, optical lever system is by level crossing 20 and base to optical lever amplification principle, and telescope 30 and meter ruler 40 form.Metallic rod 10 is vertically arranged, and what level crossing 20 connected has a vertical thimble 21, and the lower end of vertical thimble 21 stands in the upper end that length is the metallic rod 10 of L.When metallic rod 10 extends (or shortening) △ L, drive vertical thimble 21 in the vertical direction to move, and then drive level crossing 20 to rotate around fulcrum 22.Can read from telescope 30 metallic rod 10 to be measured extend before and after cross hair reading b1, b2 to scale, at this moment have the length variations amount of metallic rod:
Interferometric method principle, measuring method are as follows:
The light that spot light sends is mapped on the transflective layer of beam splitter, is divided into transmitted light beam and folded light beam, respectively through horizontal glass and index glass reflection, finally meets to produce and interferes.Interference can regard the film interference that the air film between the equivalent position of horizontal glass and index glass produces as.
The two-beam of interfering also can be regarded as and be sent by two spot lights, and their distance is 2 times of the equivalent position of horizontal glass and the spacing d of index glass, i.e. 2d.Two spot lights are approximately (air refraction n ≈ 1) to the optical path difference of any point on screen:
Wherein,
for incidence angle.
Strengthened by interference, weakened condition:
Wherein, λ is the wavelength of light.
In interference circle center,
from (5) formula, d increase (or reduction) Δ d, Δ k stripe that center just can " gush out " (or " swallowing "), the relationship of the two is:
By (6) formula, center often gushes out (or a swallowing) striped, increase (or reduction) amount of d is half wavelength.The fringe number that the Distance geometry measuring index glass movement gulps down (or telling), just can obtain wavelength; If known wavelength, count gulp down (or telling) fringe number also can find range from.
Current electric furnace only has single heating function, can not carry out the measurement of magnetostriction coefficient to horizontal metal bar, more can not carry out the kinetic measurement of magnetostriction coefficient while heating.
Utility model content
The utility model will solve electric furnace of the prior art cannot produce magnetic field, and can not magnetostriction coefficient be carried out to horizontal metal bar or while heating, carry out the technical problem of the kinetic measurement of magnetostriction coefficient, one is provided to can be used alone heating function and excitation function, also can use simultaneously, can carry out dynamically, heating that static-magnetic is measured, the dual-purpose electric furnace of excitation.
In order to solve the problems of the technologies described above, the technical solution of the utility model is specific as follows:
A kind of heating, the dual-purpose electric furnace of excitation, be provided with a removable jacking block in this electric furnace; Metallic rod to be measured can be positioned in described electric furnace;
When described metallic rod length is with temperature or change of magnetic field strength, one end of metallic rod can prop up by removable jacking block;
The magnet exciting coil for producing magnetic field is also provided with in described electric furnace; The heater coil that can be used for as heating by electric cooker is provided with in described magnet exciting coil.
In technique scheme, between adjacent two-layer magnet exciting coil, be provided with mica.
In technique scheme, be separated from each other between the circle of described magnet exciting coil and circle.
In technique scheme, described magnet exciting coil and described heater coil can work respectively or work simultaneously.
In technique scheme, described heater coil can regulate the scope of the temperature in electric furnace to be 20 ~ 100 DEG C.
The utility model has following beneficial effect:
Heating of the present utility model, the dual-purpose electric furnace of excitation, utilize change-over switch to switch heating or excitation, when heater coil is energized, and heating by electric cooker; When magnet exciting coil is energized, a stronger magnetic field in electric furnace, can be produced; When whole coil electricity, while a magnetic field can be produced in electric furnace, also temperature can be regulated.Heating function and the excitation function of electric furnace of the present utility model can be used alone, also can use simultaneously, can carry out dynamic, static-magnetic measurement.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
Fig. 1 is the structural representation of heating of the present utility model, the dual-purpose electric furnace of excitation.
Fig. 2 is the electrical block diagram of magnet exciting coil and heater coil.。
Reference numeral in figure is expressed as:
1-metallic rod; 2-level crossing; 3-telescope; 4-meter ruler; The horizontal thimble of 5-; 6-hangs position; The removable jacking block of 7-; 8-electric furnace; 9-fulcrum; 81-magnet exciting coil; 82-heater coil; 83-field switch; 84-heater button; 85-temperature controller; 86-dc source; 87-DC constant current power supply.
Detailed description of the invention
Utility model thought of the present utility model is: utilize switching over heating, excitation or heat and excitation simultaneously, when heater coil is energized, and heating by electric cooker; When magnet exciting coil is energized, in circuit, produce magnetic field; When whole coil electricity, while a magnetic field can be produced in electric furnace, also temperature can be regulated.
Below in conjunction with accompanying drawing, the utility model is described in detail.
Embodiment 1
As shown in Figure 1, a kind of heating, the dual-purpose electric furnace of excitation, be provided with the magnet exciting coil 81 for producing magnetic field in this electric furnace 8, described magnet exciting coil 81 is provided with lattice coil.Heater coil 82 in described magnet exciting coil 81 can be used for as electric furnace 8 heats.Be separated from each other between the circle of magnet exciting coil 81 and circle, adjacent two-layer between be provided with mica.Described magnet exciting coil 81 circuit there is field switch 83, DC constant current power supply 87; Described heater coil 82 circuit there is heater switch 84, temperature controller 85 and dc source 86; Utilize field switch 83 and heater button 84 can realize heating separately or independent excitation respectively or carry out heating and excitation simultaneously.As shown in Figure 2, innermost layer be heater coil 82, skin is magnet exciting coil 81.Described heater coil 82 can regulate the scope of the temperature in electric furnace to be 20 ~ 100 DEG C.
When application heating of the present utility model, the dual-purpose electric furnace of excitation carry out magnetostriction coefficient measurement:
First, measurement metallic rod 1 is hung by suspension position 6;
Then, metallic rod 1 be positioned in electric furnace 8, the right-hand member of metallic rod 1 is propped up by removable jacking block 7, the horizontal thimble 5 that optical lever system midplane mirror 2 connects abuts with the left end of metallic rod 1; Heater coil 82 is energized, regulates the temperature in electric furnace to be 50 DEG C.
Be energized to magnet exciting coil 81, be energized to magnet exciting coil 81, the intensity in magnetic field rises to 50kA/m by 10kA/m and changes magnetic field in this electric furnace 8, utilizes optical lever system to measure the length variations amount △ L of metallic rod 1; With the changes of magnetic field in electric furnace 8, when described metallic rod 1 length L changes, the left end of metallic rod 1 heads on described horizontal thimble 5 and moves, and makes it rotate around described fulcrum 9, and then drives level crossing 2 to rotate.At this moment, changed by the scale of the meter ruler 4 observed in telescope 3, and then calculate the length variations amount △ L of metallic rod 1.
Metallic rod length variations experiments of measuring data:
According to optical lever principle, calculate the length variations amount △ L=0.30mm of metallic rod 1.
Finally, according to the length variations amount △ L of the metallic rod 1 and length L of metallic rod 1, magnetostriction coefficient λ when temperature is 50 DEG C is calculated.
In other detailed description of the invention, apply heating of the present utility model, the dual-purpose electric furnace of excitation, can by regulating temperature within the scope of 20 ~ 100 DEG C, change the length variations of metallic rod, and then carry out the measurement of coefficient of thermal expansion, principle is identical with the principle that above-mentioned magnetostriction coefficient is measured, and repeats no more here.
Embodiment 2
Electric furnace of the present utility model can be applied in Young's modulus dynamic measurement device, and as shown in Figure 1, the experimental provision of this kinetic measurement metallic rod Young's modulus, comprising:
Electric furnace 8, is provided with a removable jacking block 7 in this electric furnace 8, and is used for producing the magnet exciting coil 81 in magnetic field; The upper end of electric furnace 8 is provided with the opening for putting into metallic rod 1;
Suspension method kinetic measurement Experiment of Measuring Young's device; Metallic rod 1 to be measured can be positioned in described electric furnace 8;
Optical lever system, the level crossing 2 in this optical lever system is connected with a horizontal thimble 5; Level crossing 2 can rotate around the fulcrum 9 of lower end.
When utilizing optical lever system to measure the length variations amount of metallic rod 1, removable jacking block 7 can be utilized to be propped up by the right-hand member of metallic rod 1, and horizontal thimble 5 abuts with the left end of metallic rod 1.When utilizing the Young's modulus of suspension method kinetic measurement metallic rod 1, removable jacking block 7 and horizontal thimble 5 all not with two end in contact of described metallic rod 1.
The experimental technique of Young's modulus kinetic measurement comprises the following steps:
Step 1: application suspension method kinetic measurement Experiment of Measuring Young's device, measures the resonant frequency f=1177.0Hz of metallic rod 1 at temperature 10 DEG C;
Step 2: metallic rod 1 be positioned in electric furnace 8, makes removable jacking block 7 be propped up by the right-hand member of metallic rod 1, and the horizontal thimble 5 that optical lever system midplane mirror 2 connects abuts with the left end of metallic rod 1;
Step 3: magnet exciting coil 81 is energized, the intensity in magnetic field rises to 50kA/m by 10kA/m and changes magnetic field in this electric furnace 8, utilizes optical lever system to measure the length variations amount △ L of metallic rod 1; With the changes of magnetic field in electric furnace 8, when described metallic rod 1 length L changes, the left end of metallic rod 1 heads on described horizontal thimble 5 and moves, and makes it rotate around described fulcrum 9, and then drives level crossing 2 to rotate.At this moment, changed by the scale of the meter ruler 4 observed in telescope 3, and then calculate the length variations amount △ L of metallic rod 1.
Metallic rod length variations experiments of measuring data:
According to optical lever principle, calculate the length variations amount △ L=0.30mm of metallic rod 1.
Step 4: according to the length variations amount △ L of the metallic rod 1 and magnetostriction coefficient λ of metallic rod 1 material, calculate the length L of metallic rod 1;
Step 5: measure the quality m and the diameter d that obtain metallic rod 1;
Step 6: according to length L, the quality m of metallic rod 1, diameter and resonant frequency f in step 1, calculate the Young's modulus E=2.2Nm of metallic rod 1
-2.
Embodiment 3 interferometric method
Be l by length
0metal bar to be measured hold out against with two jacking blocks respectively; Wherein, a jacking block is fixed, index glass in another one jacking block and Michelson's interferometer links, and this jacking block can carry out constant velocity linear and move along with the line of metal bar to be measured expands, and then the interference figure that Michelson's interferometer is produced will carry out at the uniform velocity rule and changes;
To magnet exciting coil energising, in magnet exciting coil, the region between two jacking blocks forms uniform magnetic field; Observe the pattern of interference fringe;
Change the electrical current of magnet exciting coil, and then change magnetic field intensity B;
Total varied number Δ k of recording interference fringe pattern;
According to Δ l=Δ k λ/2, μ=Δ l/l
0b, calculates magnetostriction coefficient μ; Wherein, Δ l is the length variations amount of metal bar to be measured, and λ is interference light wavelength.
Obviously, above-described embodiment is only for clearly example being described, and the restriction not to embodiment.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here exhaustive without the need to also giving all embodiments.And thus the apparent change of extending out or variation be still among the protection domain of the invention.
Claims (5)
1. heating, the dual-purpose electric furnace of excitation, is characterized in that, be provided with a removable jacking block (7) in this electric furnace (8); Metallic rod (1) to be measured can be positioned in described electric furnace (8);
When described metallic rod (1) length is with temperature or change of magnetic field strength, one end of metallic rod (1) can prop up by removable jacking block (7);
The magnet exciting coil (81) for producing magnetic field is also provided with in described electric furnace (8); The heater coil (82) that can be used for as electric furnace (8) heats is provided with in described magnet exciting coil (81).
2. heating according to claim 1, the dual-purpose electric furnace of excitation, is characterized in that, is provided with mica between adjacent two-layer magnet exciting coil (81).
3. heating according to claim 1, the dual-purpose electric furnace of excitation, is characterized in that, is separated from each other between the circle of described magnet exciting coil (81) and circle.
4. heating according to claim 1, the dual-purpose electric furnace of excitation, is characterized in that, described magnet exciting coil (81) and described heater coil (82) can work respectively or work simultaneously.
5. heating according to claim 1, the dual-purpose electric furnace of excitation, is characterized in that, described heater coil (82) can regulate the scope of the temperature in electric furnace to be 20 ~ 100 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520468999.2U CN204787807U (en) | 2015-07-02 | 2015-07-02 | Heating, dual -purpose electric stove of excitation |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520468999.2U CN204787807U (en) | 2015-07-02 | 2015-07-02 | Heating, dual -purpose electric stove of excitation |
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| Publication Number | Publication Date |
|---|---|
| CN204787807U true CN204787807U (en) | 2015-11-18 |
Family
ID=54527832
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520468999.2U Expired - Fee Related CN204787807U (en) | 2015-07-02 | 2015-07-02 | Heating, dual -purpose electric stove of excitation |
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|---|---|
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105004182A (en) * | 2015-07-02 | 2015-10-28 | 吉林大学 | Dual-purpose electric stove for heating and excitation |
-
2015
- 2015-07-02 CN CN201520468999.2U patent/CN204787807U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105004182A (en) * | 2015-07-02 | 2015-10-28 | 吉林大学 | Dual-purpose electric stove for heating and excitation |
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| 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: 20151118 |