CN105510189B - Reduce the device and method of barometric surveying Millikan oil drop balanced voltage - Google Patents
Reduce the device and method of barometric surveying Millikan oil drop balanced voltage Download PDFInfo
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- CN105510189B CN105510189B CN201510897248.7A CN201510897248A CN105510189B CN 105510189 B CN105510189 B CN 105510189B CN 201510897248 A CN201510897248 A CN 201510897248A CN 105510189 B CN105510189 B CN 105510189B
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- cylinder
- piston
- oil droplet
- oil
- fixed plate
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume, or surface-area of porous materials
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume, or surface-area of porous materials
- G01N2015/0003—Determining electric mobility, velocity profile, average speed or velocity of a plurality of particles
Abstract
The device and method of barometric surveying Millikan oil drop balanced voltage is reduced, causes oil droplet influence of unbalance power to bring the influence to measuring oil droplet balanced voltage to reduce gas collisions, technical scheme is：Plate paves Gask-O-Seal above oil instrument, between the breach of cylinder rides over the inside and outside two panels of semicircle sealing gasket, is in close contact the other parts of cylinder and Gask-O-Seal with the tight cylinder of hand pressure；Rotary cross shape lever movement piston structure changes the pressure of sealing gas, until oil droplet does not observe Brownian movement；Piston moves, and the volume of sealing gas is 10 100 times of cylinder interior volume.Beneficial effect is：It is capable of the balanced voltage of more Accurate Determining oil droplet；Semicircle sealing gasket is ridden over inside and outside the breach of cylinder, possesses self-sealing function；The diameter of fixed plate 0.5 1mm smaller than the diameter of piston structure, avoids fixed plate from being contacted with piston cylinder inwall, so as to avoid rubbing；Piston is improved to three-decker, is advantageous to keep the air-tightness of piston；It is easy to return to normal pressure.
Description
Technical field
The present invention relates to the fields of measurement of physical quantity.
Background technology
When judging object receiving force balance, usually using object it is static or in linear uniform motion as judgement
Standard, whether most situation in static all judge whether stress object is in dynamic balance（It is 0 with joint efforts）.
Spacing of the diameter of Millikan oil drop substantially between the order of magnitude of micron, air molecule is substantially in the quantity of nanometer
Level, when oil droplet is close to balance, oil droplet is equivalent to suspended particulate, by the irregular collision of air molecule, oil droplet
Brownian movement occurs in grain, i.e., irregular random motion, causes the judgement of oil droplet stress balance relatively difficult.For bigger
Oil droplet, air molecule is smaller with respect to the gravity of oil droplet to the influence of unbalance power of oil droplet（I.e. quality is big, inertia is big）, it suspends
When stability it is relatively good, but due to oil droplet is big, quality is big, by air molecule effect it is smaller, speed ratio during whereabouts compared with
It hurry up（The time fallen is shorter）, the application condition for measuring its fall time is big（Physiological reaction speed 0.1 under one's control
Second, because oil droplet is relatively fine, the devices such as photoelectric door can not be used to carry out timing, laggard pedestrian is all typically amplified using microscope
To judge that its position and operation start timing and operation stopping timing）；When oil droplet is smaller, collided by air molecule
The disequilibrium performance of effect is bigger, and Brownian movement is obvious, can not accurately determine if to be in poised state, cause
The measurement error of balanced voltage is bigger.
The content of the invention
Oil droplet influence of unbalance power is caused to bring the influence to measuring oil droplet balanced voltage, the present invention to reduce gas collisions
Design reduces the device and method of barometric surveying Millikan oil drop balanced voltage.
The present invention realizes that the technical scheme that goal of the invention uses is：Reduce the dress of barometric surveying Millikan oil drop balanced voltage
Put, it is characterized in that：Plate i.e. bottom crown bottom place plane are hard material above oil instrument, can bear an air
The pressure difference of pressure；One one end closing, the cylinder of one end open, cylinder cover the region where oil droplet box, and the region includes oil
There is a hole stretched for camera lens mist cup, oil droplet room, hurricane globe and camera system, the side of hurricane globe, and camera system includes mirror
Head, optical system and CCD boxes, a Gask-O-Seal is spaced between cylinder opening end and instrument top panel；Cylinder connects one
Piston cylinder, the lateral ends of the piston inside piston cylinder are connected to a screw rod by a connecting rod, screw rod it is in rotary moving
It is converted into the translation of piston；There are a breach, the electric wire of top crown and the electric wire of bottom crown and camera in the openend of cylinder
Cable synthesize one group of electric wire, this group of electric wire abbreviation joint current, one semicircle is fixed by melting at the middle part of joint current
Shape sealing gasket, the arch section of semicircle sealing gasket are cut into inside and outside two panels, and semicircle sealing gasket rides over the breach of cylinder
Inside and outside（The inside and outside two panels of i.e. semicircle sealing gasket is located at the inner side and outer side of cylinder respectively）, the bottom of semicircle sealing gasket
It is fused together on the upside of portion and Gask-O-Seal, the plain conductor that semicircle sealing gasket can be in seal gap, electric wire possesses branch
Support effect ensures to be subjected to displacement in the inside and outside differential pressure effect lower semi-circular sealing gasket of cylinder, i.e., semicircle sealing gasket ensures not
Can gas leakage.
To realize the translation in rotary moving for being converted into piston of screw rod, piston is three-decker, and left side is piston structure, in
Interbed is flat board, and right side is fixed plate, has a circle circular groove on the right side of piston structure, the both sides in intermediate layer respectively have a circle circle recessed
There is a circle circular groove in groove, fixed plate left side, and the reeded shapes and sizes of institute are identical, on the right side of piston structure and on the left of intermediate layer
Two relative circle grooves accommodate ball, and the intermediate layer right side two circle grooves relative with the left of fixed plate accommodate ball；Fixed plate
Diameter is smaller 0.5-1mm than the diameter of piston structure, and the diameter in intermediate layer is less than the diameter of fixed plate, is welded on the right side of piston structure
The screw on surface passes through the screw of fixed plate, comes fixed piston structure, left side ball, centre in the right side tightening nuts of fixed plate
Layer, right side ball and fixed plate；There is a hole at fixed plate center, and left side one end of connecting rod connects after passing through fixed plate centre bore
The center in intermediate layer is connected to, right side one end of connecting rod is connected to the rotation in the left side of screw rod, then screw rod, drives intermediate layer rotation
Turn, the rotation in intermediate layer drives ball to rotate, and extrusion piston structure or pulling piston structure produce translation.
Use the method for the measurement device oil droplet balanced voltage for reducing barometric surveying Millikan oil drop balanced voltage, its feature
It is：Plate paves Gask-O-Seal above oil instrument, between the breach of cylinder rides over the inside and outside two panels of semicircle sealing gasket, uses
The tight cylinder of hand pressure is in close contact the other parts of cylinder and Gask-O-Seal；The outboard end of screw rod has the cross thick stick of intersection
There is internal thread bar, the openend of piston cylinder, and the external screw thread of screw rod has internal thread to contact with the openend of piston cylinder, rotary cross shape
Lever moves piston structure, and until oil droplet does not observe Brownian movement, now adjustment voltage knob, makes oil droplet in vertical side
To balance is kept, the equilibrium voltage value shown on oil instrument screen is now read；Left side stop position of the piston structure from piston cylinder
Right side stop position is moved to, its volume is 10-100 times of cylinder interior volume, i.e., can make the air pressure of oil droplet chamber interior reduce
To 0.1-0.01 times of atmospheric pressure.
The beneficial effects of the invention are as follows：Reducing the air pressure of oil droplet chamber interior can ignore that the Brownian movement phenomenon of oil droplet,
It is capable of the balanced voltage of more Accurate Determining oil droplet；Semicircle sealing gasket is ridden over inside and outside the breach of cylinder, when vacuumizing,
Because the air pressure in outside is more than the air pressure on the inside of cylinder, promotes the outside of semicircle sealing gasket to be closely adjacent to the outside of cylinder, rise
Sealing function, possesses self-sealing function；The diameter of fixed plate is smaller 0.5-1mm than the diameter of piston structure, avoids fixed plate and work
Plug tube inwall contacts, so as to avoid rubbing；Piston is improved to three-decker, by the translation for being changed into piston of screw rod, spiral shell
Bar speed ratio in the presence of lever is relatively labor-saving, and the translation of piston is advantageous to keep the air-tightness of piston；The device of the present invention leads to
Cross and change the volume of sealing gas to change pressure, operation is fairly simple, and screw-rod structure can stop operating at an arbitrary position, interior
Active force caused by external differential is perpendicular to the plane where screw thread, therefore inside and outside differential pressure can be kept, and the pressure of sealing gas is extensive
Reactivation is enough to be realized by screw rod cycle original place；The concrete numerical value of air pressure is not that patent of the present invention is of interest, as long as the present invention
It was observed that oil droplet is not offset in the horizontal direction, influence of the air pressure collision to balanced voltage measurement is now just can ignore that, now
Adjustment voltage knob, make oil droplet keep balancing in vertical direction, be now measured, it is extensive then can gradually to withdraw from vacuum
Normal pressure is arrived again.
Brief description of the drawings
Fig. 1 is Chengdu century Zhong Ke Instrument Ltd. experiment instrument block diagram, and Fig. 2 is oil droplet box device schematic diagram；
Fig. 3 is seal closure schematic diagram；Fig. 4 is changed into the piston schematic diagram of translation；
Wherein 1, CCD boxes 2, power outlet 3, focusing knob 4, Q9 video interfaces 5, optical system 6, camera lens 7, sight
Examine hole 8, top crown stage clip 9, light well 10, light source 11, acknowledgement key 12, status indicator lamp 13, balance and lifting switch key 14,
0V and work switch key 15, regularly start over switch key 16, air level 17, voltage-regulation knob 18, holding screw 19, electricity
Source switch 20, oil droplet pipe receiver lay ring 21, levelling bolt (3)；31st, nozzle, 32, oil inlet quantity switch, 33, anti-
Fan housing, 34, top crown, 35, oil droplet room, 36, bottom crown, 37, mist of oil cup, 38, fall oilhole, 39, cylinder, 40, piston cylinder, 41,
Piston, 42, connecting rod, 43, screw rod, 44, cross lever, 45, Gask-O-Seal, 46, breach, 47, piston structure, 48, rolling
Pearl, 49, intermediate layer, 50, fixed plate.
Embodiment
Prior art：
The oil droplet box of prior art, generally cylindrical cross section, its underpart is bottom crown 36, and bottom crown provides one for oil droplet box
Electrode, is traditionally arranged to be negative pole, and the hollow space that cylindrical shape surrounds is the space of oil droplet suspension, referred to as oil droplet room 35, oil droplet room
The height of 35 inner spaces is generally 5 millimeters, and there are three sealed transparent holes columnar side（Transparent material seals, to illumination
It is transparent, it is sealing for gas）, one of them is peep hole 7, and two other transparent apertures is light well 9, light well 9
Illumination comes from LED source 10, and columnar top covers top crown 34, the upper surface top crown pressure of top crown 34
Spring 8, top crown stage clip 8 provide an electrode for oil droplet box, are traditionally arranged to be positive pole.The center of top crown 34 has one to fall oilhole
38, fall the aperture that oilhole 38 is the millimeter of diameter 0.5.The regulation of voltage-regulation knob 17 is loaded into top crown 34 and bottom crown 36
Between voltage V, so as to adjust electric field E=V/5mm between top crown 34 and bottom crown 36.
There is annular hurricane globe 33 on the outside of oil droplet box, avoid outside air from flowing the influence to oil droplet, hurricane globe 33
Top is mist of oil cup 37, and mist of oil cup 37 is typically made up of a circular cylinder, upper lid and bottom lid, and there is nozzle its side of circular cylinder
31, mist of oil cup 37 has upper lid and bottom lid, and upper lid, bottom and circular cylinder form cup-like structure, and its bottom has hole, the hole of its bottom
By a sheet metal cover, sheet metal can move in the diametric(al) of bottom, and sheet metal also has a hole, its aperture
It is typically equal with the aperture in the hole of bottom, when mobile sheet metal makes the hole of hole face bottom of sheet metal, sprinkling
The hole of two faces is passed through in the part oil droplet of mist of oil cup, the part through the oil droplet in hole enters from the oilhole 38 that falls of oil droplet box
Oil droplet room 35, the sheet metal are also known as oil inlet quantity switch 32.
The light that light source 10 is sent, which illuminates the inner space of oil droplet room 35, camera lens 6 and optical system 5 and focusing knob 3, to be made
The oil droplet of suspension is imaged onto CCD boxes 1, and the image of CCD boxes 1 is connected on display by Q9 video interfaces 4.
Status indicator lamp 12 represents it is that regulation oil droplet balances, or oil droplet is in lifting state, and lifting is drawn by oil droplet
The top of visual field is raised to, is the voltage for increasing an about 200V on the basis of balanced voltage, promotes oil droplet to move upwards；It is flat
The switching button of weighing apparatus and lifting switch key 13, balance and lifting, its state is determined by status indicator lamp 12.0V and work switching
Key 14,0V are after electric field force is cancelled, and oil droplet is in gravitational field and moved downward, by the resistance of air, accelerate one section away from
It can be in from after and at the uniform velocity fall（If you do not consider Brownian movement）, work refer under electric field action, adjustment voltage or
Person adjusts the booster tension for being lifted up oil droplet.
Timing starts over switch key 15, regularly starts to start timing, regularly terminates, stop timing.Because electric field is vertical
In top crown 34 and bottom crown 36 in parastate, gravity is in vertical direction, it is therefore desirable to adjusts top crown 34 with
Pole plate 36 is horizontal, makes the direction of gravity parallel with the direction of electric field, therefore pass through 3 (determine a plane) levelling bolts at 3 points
21 regulations make the instruction of air level 16 be in horizontality.Holding screw 18 is the fixing device of CCD case bases, and power switch 19 is
The power switch of instrument work, it is to facilitate the storing unit of oil droplet pipe when not in use that oil droplet pipe receiver, which lays ring 20, avoids oil
The fluid oil of dropper drops onto desktop.Power outlet 2 is connected to 220V AC power, is the input power of instrument；Acknowledgement key
11 can be with record data in display screen（Substantially it is in internal memory）, delete current data, measurement finish calculate oil droplet electric charge
The functions such as amount.
Corrective measure：
The device of barometric surveying Millikan oil drop balanced voltage is reduced, plate i.e. the bottom of bottom crown 36 above oil instrument
Place plane, plate is hard material above oil instrument, can bear the pressure difference of an atmospheric pressure；One one end closing, one
The cylinder 39 of end opening, cylinder cover the region where oil droplet box, and the region includes mist of oil cup 37, oil droplet room 35, hurricane globe 33
And there are the gas that a hole stretched for camera lens, the hole can connect oil droplet room 35, shooting in camera system, the side of hurricane globe 33
System includes camera lens 6, optical system 5 and CCD boxes 1, and a Gask-O-Seal is spaced between cylinder opening end and instrument top panel
45（Now cylinder 39 seals its internal space）；Cylinder connects a piston cylinder 40, and one of the piston 41 inside piston cylinder 40
End is connected to a screw rod 43, the translation in rotary moving for being converted into piston 41 of screw rod 43 by a connecting rod 42；Cylinder
There is a breach 46 openend, the electric wire of top crown and the cable of the electric wire of bottom crown and camera synthesize one group of electric wire, this
Group electric wire abbreviation joint current, a semicircle sealing gasket, semicircle sealing gasket are fixed at the middle part of joint current by melting
Arch section be cut into inside and outside two panels, semicircle sealing gasket is ridden over inside and outside the breach 46 of cylinder 39, is being vacuumized
When（Rotary screw causes cylinder interior sealing air pressure to reduce laterally）, because the air pressure in outside is more than the air pressure on the inside of cylinder,
Promote the outside of semicircle sealing gasket to be closely adjacent to the outside of cylinder, seal, bottom and the annular of semicircle sealing gasket
It is fused together on the upside of sealing gasket, the plain conductor that semicircle sealing gasket can be in seal gap 46, electric wire possesses supporting role
（Cause the gap between the outside of joint current and breach smaller）Ensure the inside and outside differential pressure effect lower semi-circular sealing in cylinder 39
Pad will not be subjected to displacement, i.e., semicircle sealing gasket ensures will not gas leakage.
To realize the translation in rotary moving for being converted into piston 41 of screw rod 43, piston 41 is three-decker, and left side is piston
Structure 47, intermediate layer are flat board 49, and right side is fixed plate 50, and there is a circle circular groove on the right side of piston structure 47, intermediate layer 49
Respectively there is a circle circular groove both sides, and there is a circle circular groove in the left side of fixed plate 50, and the reeded shapes and sizes of institute are identical, piston
The right side of the structure 47 two circle grooves relative with the left side of intermediate layer 49 accommodate ball 48, the right side of intermediate layer 49 and the left side phase of fixed plate 50
To two circle circular grooves accommodate balls 48；The diameter of fixed plate 50 is smaller 0.5-1mm than the diameter of piston structure 47, intermediate layer
Diameter is less than the diameter of fixed plate 50, and the screw for being welded on the right lateral surface of piston structure 47 passes through the screw of fixed plate 50, solid
The right side tightening nuts of fixed board 50 come fixed piston structure 47, left side ball 48, intermediate layer 49, right side ball 48 and fixed plate
50；There is a hole at the center of fixed plate 50, and one end of connecting rod 42 is connected in intermediate layer 49 after passing through the centre bore of fixed plate 50
The heart, the other end of connecting rod 42 are connected to the rotation in the left side of screw rod 43, then screw rod, drive intermediate layer 49 to rotate, intermediate layer 49
Rotation drive ball 48 rotate, extrusion piston structure 47 or pull piston structure 47 produce translation.
The method for reducing barometric surveying Millikan oil drop balanced voltage, plate paves Gask-O-Seal above oil instrument
45, between the breach 46 of cylinder 39 rides over the inside and outside two panels of semicircle sealing gasket, make the other of cylinder 39 with the tight cylinder 39 of hand pressure
Part is in close contact with Gask-O-Seal 45（After pressure reduction, external atmosphere pressure effect can further increase pressure, ensure
The sealing of Gask-O-Seal 45）；The outboard end of screw rod has the cross lever 44 of intersection（Possess laborsaving）, piston cylinder 40 opens
There is internal thread at mouth end, and the external screw thread of screw rod 43 has internal thread to contact with the openend of piston cylinder 40, and rotary cross shape lever 44 moves
Piston structure 47, until oil droplet does not observe Brownian movement（Under the resolution ratio of eyes, oil droplet is not observed in left and right directions
Drift）, voltage-regulation knob 17 is now adjusted, makes oil droplet keep balancing in vertical direction, now reads on oil instrument screen
The equilibrium voltage value of display；Piston structure 47 is moved to right side stop position from the left side stop position of piston cylinder, and its volume is cylinder
10-100 times of 39 internal volumes, i.e., the air pressure of oil droplet chamber interior can be made to be reduced to 0.1-0.01 times of atmospheric pressure（It is herein
Refer to the ultimate pressure value of instrument, do not refer to the excursion of instrument pressure）.
Claims (3)
1. the device of barometric surveying Millikan oil drop balanced voltage is reduced, it is characterized in that：Plate namely descends pole above oil instrument
Plate（36）Plane where bottom is hard material, can bear the pressure difference of an atmospheric pressure；One one end closing, one end open
Cylinder（39）, cylinder covers the region where oil droplet box, and the region includes mist of oil cup（37）, oil droplet room（35）, hurricane globe
（33）And camera system, hurricane globe（33）Side have a hole stretched for camera lens, camera system includes camera lens（6）, optics
System（5）With CCD boxes（1）, a Gask-O-Seal is spaced between cylinder opening end and instrument top panel（45）；Cylinder connection one
Individual piston cylinder（40）, piston cylinder（40）Internal piston（41）One end pass through a connecting rod（42）It is connected to a screw rod
（43）, screw rod（43）In rotary moving be converted into piston（41）Translation；There is a breach openend of cylinder（46）, top crown
Electric wire and bottom crown electric wire and camera cable synthesize one group of electric wire, this group of electric wire abbreviation joint current, in joint current
Middle part one semicircle sealing gasket is fixed by melting, the arch section of semicircle sealing gasket is cut into inside and outside two
Piece, semicircle sealing gasket is ridden over inside and outside the breach (46) of cylinder, on the bottom and Gask-O-Seal of semicircle sealing gasket
Side is fused together, and semicircle sealing gasket being capable of seal gap（46）, the plain conductor in electric wire possesses supporting role ensures
Cylinder（39）Inside and outside differential pressure effect lower semi-circular sealing gasket will not be subjected to displacement, i.e., semicircle sealing gasket ensures will not gas leakage.
2. the device according to claim 1 for reducing barometric surveying Millikan oil drop balanced voltage, it is characterized in that：Piston
（41）For three-decker, left side is piston structure（47）, intermediate layer（49）For flat board, right side is fixed plate（50）, piston structure
（47）There are a circle circular groove, intermediate layer in right side（49）Both sides respectively have a circle circular groove, fixed plate（50）There is a circle in left side
Circular groove, the reeded shapes and sizes of institute are identical, piston structure（47）Right side and intermediate layer（49）Two relative circles of left side
Groove accommodates ball（48）, intermediate layer（49）Right side and fixed plate（50）Two relative circle grooves of left side accommodate ball（48）；Gu
Fixed board（50）Diameter compare piston structure（47）The small 0.5-1mm of diameter, the diameter in intermediate layer is less than fixed plate（50）Diameter,
It is welded on piston structure（47）The screw of right lateral surface passes through fixed plate（50）Screw, in fixed plate（50）Right side screw spiral shell
Cap carrys out fixed piston structure（47）, left side ball（48）, intermediate layer（49）, right side ball（48）And fixed plate（50）；It is fixed
Plate（50）There are a hole, connecting rod in center（42）Left side one end pass through fixed plate（50）Intermediate layer is connected to after centre bore（49）
Center, connecting rod（42）Right side one end be connected to screw rod（43）Left side, then screw rod rotation, drive intermediate layer（49）Rotation
Turn, intermediate layer（49）Rotation drive ball（48）Rotate, extrusion piston structure（47）Or pull piston structure（47）Produce
Translation.
3. the measurement device oil droplet balanced voltage of the reduction barometric surveying Millikan oil drop balanced voltage described in usage right requirement 2
Method, it is characterized in that：Plate paves Gask-O-Seal above oil instrument（45）, cylinder（39）Breach（46）Ride over half
Between the inside and outside two panels of round gasket, with the tight cylinder of hand pressure（39）Make cylinder（39）Other parts and Gask-O-Seal（45）
It is in close contact；The outboard end of screw rod has the cross lever (44) of intersection, piston cylinder（40）Openend have internal thread, screw rod
（43）External screw thread and piston cylinder（40）Openend have internal thread contact, rotary cross shape lever（44）Mobile piston structure
（47）, until oil droplet does not observe Brownian movement, now adjust voltage-regulation knob（17）, oil droplet is kept flat in vertical direction
Weighing apparatus, now read the equilibrium voltage value shown on oil instrument screen；Piston structure（47）From the left side stop position movement of piston cylinder
To right side stop position, its volume is cylinder（39）10-100 times of internal volume, i.e., can make the air pressure of oil droplet chamber interior reduce
To 0.1-0.01 times of atmospheric pressure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510897248.7A CN105510189B (en) | 2015-12-08 | 2015-12-08 | Reduce the device and method of barometric surveying Millikan oil drop balanced voltage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510897248.7A CN105510189B (en) | 2015-12-08 | 2015-12-08 | Reduce the device and method of barometric surveying Millikan oil drop balanced voltage |
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| CN105510189B true CN105510189B (en) | 2018-01-05 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3859526A (en) * | 1973-10-23 | 1975-01-07 | Block Engineering | Method and apparatus for detecting |
| CN103874914A (en) * | 2011-08-02 | 2014-06-18 | Izon科技有限公司 | Characterization of particles |
| CN104298819A (en) * | 2014-09-28 | 2015-01-21 | 深圳职业技术学院 | Method and device for processing Milliken oil drop experiment data |
| CN204440091U (en) * | 2015-03-18 | 2015-07-01 | 南京工业大学 | A kind of for the voltage regulating device in Millikan oil-drop experiment instrument |
| CN104880393A (en) * | 2015-07-01 | 2015-09-02 | 重庆大学 | Device and method for measuring PM 2.5 of specific places |
-
2015
- 2015-12-08 CN CN201510897248.7A patent/CN105510189B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3859526A (en) * | 1973-10-23 | 1975-01-07 | Block Engineering | Method and apparatus for detecting |
| CN103874914A (en) * | 2011-08-02 | 2014-06-18 | Izon科技有限公司 | Characterization of particles |
| CN104298819A (en) * | 2014-09-28 | 2015-01-21 | 深圳职业技术学院 | Method and device for processing Milliken oil drop experiment data |
| CN204440091U (en) * | 2015-03-18 | 2015-07-01 | 南京工业大学 | A kind of for the voltage regulating device in Millikan oil-drop experiment instrument |
| CN104880393A (en) * | 2015-07-01 | 2015-09-02 | 重庆大学 | Device and method for measuring PM 2.5 of specific places |
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| CN105510189A (en) | 2016-04-20 |
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