CN106781913A - A kind of electromagnetism magnetic force apparatus for demonstrating - Google Patents
A kind of electromagnetism magnetic force apparatus for demonstrating Download PDFInfo
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- CN106781913A CN106781913A CN201611207943.7A CN201611207943A CN106781913A CN 106781913 A CN106781913 A CN 106781913A CN 201611207943 A CN201611207943 A CN 201611207943A CN 106781913 A CN106781913 A CN 106781913A
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- G09B23/06—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for physics
- G09B23/18—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for physics for electricity or magnetism
- G09B23/181—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for physics for electricity or magnetism for electric and magnetic fields; for voltages; for currents
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Abstract
The invention discloses a kind of electromagnetism magnetic force apparatus for demonstrating, including device body；Described device body interior is provided with electric magnetisation device, the electric magnetisation device upside is installed by battery, the battery is connected by wire with slide rheostat, iron block is installed inside the electric magnetisation device, the iron block side is provided with needle, and described device body interior installs magnetic electric generating devcie, magnet is provided with inside the magnetic electric generating devcie, the magnet upside is welded with motion bar, and coil is provided with immediately below the magnet.The present invention, detection electric current can be carried out by galvanometer when magnetic electric generating devcie electric current is more weak, when motion bar is pressed, spring is upheld, when unclamping motion bar, spring can help magnet to reset rapidly, next round experiment is carried out, current converter can be changed to the sense of current inside magnetic electric generating devcie, to verify the electric current effect produced by the electric current of different directions.
Description
Technical field
The present invention relates to electromagnetism demonstration equipment technical field, specially a kind of electromagnetism magnetic force apparatus for demonstrating.
Background technology
Electromagnetism is a branch of physics, originates from modern age.The electromagnetism of broad sense can be described as comprising electricity and magnetic
Learn, but for narrow sense be one inquire into electrically with the subject of magnetic interactive relation, electric magnetisation can be all related in senior middle school of junior middle school
With the teaching of magnetic life electricity, teacher typically can carry out magnetic life electricity and electric magnetisation draws demonstration, and the equipment for being used is typically all
Make by hand, device seems more simple and crude and larger by external interference, and effect is relatively poor.
The content of the invention
It is an object of the invention to provide a kind of electromagnetism magnetic force apparatus for demonstrating, to solve what is proposed in above-mentioned background technology
Device is more simple and crude, larger by external interference, the relatively poor problem of effect.
To achieve the above object, the present invention provides following technical scheme：A kind of electromagnetism magnetic force apparatus for demonstrating, including device
Body；Described device body interior is provided with electric magnetisation device, and battery, the battery are installed in the electric magnetisation device upside
Upside is provided with run switch, and the battery is connected by wire with slide rheostat, and the electric magnetisation device inside is installed
There is iron block, the iron block outside is wound with wire, and described wire one end is connected with battery, and the iron block side is provided with magnetic
Pin, described device body interior installs magnetic electric generating devcie, and magnet, magnet upside weldering are provided with inside the magnetic electric generating devcie
Motion bar is connected to, coil is installed immediately below the magnet, the coil two ends constitute loop, the dress by wire with bulb
Put outer body and insulation crust is installed, described device body inner side scribbles antistatic backing.
Preferably, galvanometer is installed inside the magnetic electric generating devcie, the galvanometer is connected by wire with coil.
Preferably, detection power supply is installed inside the electric magnetisation device, the detection power supply is entered by wire with bulb
Row series connection.
Preferably, the magnet top is provided with spring, and the spring one end is connected with insulation crust.
Preferably, current transfer device is installed, the current transfer device passes through wire inside the electric magnetisation device
It is electrically connected with battery.
Compared with prior art, the beneficial effects of the invention are as follows：Galvanometer can detect the high sensitivity of faint electricity
Electromechanical indicating meters, in electric bridge, potential difference meter as nulling instrument, it can also be used to micrometer weak current, voltage and
Electric charge etc., when magnetic electric generating devcie electric current more weak tendency can carry out detection electric current by galvanometer, detection power supply can give birth to magnetic
Circuit inside electricity is detected that prevent from influenceing experimental result due to internal circuit problem, spring is upheld when motion bar is pressed,
When unclamping motion bar, spring can help magnet to reset rapidly, carry out next round experiment, and current converter can give birth to Denso to magnetic
The sense of current for putting inside is changed, to verify the electric current effect produced by the electric current of different directions.
Brief description of the drawings
Fig. 1 is structural representation of the invention；
Fig. 2 is internal structure schematic diagram of the invention；
Fig. 3 galvanometer structural representation of the invention.
In figure：1- device bodies；2- run switch；3- current transfer devices；4- slide rheostats；5- motion bars；6- glass
Glass window；7- detects power supply；8- insulation crusts；9- electricity magnetisation devices；10- antistatic backings；11- wires；12- iron blocks；13- needles；
14- magnet；15- coils；16- springs；17- galvanometers；18- bulbs；19- magnetic electric generating devcies；20- batteries；31- backboards；32-
Distinguishing mark.
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made
Embodiment, belongs to the scope of protection of the invention.
Refer to Fig. 1 and Fig. 2, a kind of embodiment that the present invention is provided：A kind of electromagnetism magnetic force apparatus for demonstrating, including device
Body 1；Electric magnetisation device 9 is installed, battery 20, the upside of battery 20 are installed in the upside of electric magnetisation device 9 inside device body 1
Run switch 2 is installed, battery 20 is connected by wire 11 with slide rheostat 4, and iron block is provided with inside electric magnetisation device 9
12, the outside of iron block 12 is wound with wire 11, and the one end of wire 11 is connected with battery 20, and the side of iron block 12 is provided with needle 13, dress
Put the inside of body 1 and magnetic electric generating devcie 19 is installed, magnet 14 is installed inside magnetic electric generating devcie 19, the upside of magnet 14 is welded with activity
Bar 5, is provided with coil 15 immediately below magnet 14, the two ends of coil 15 constitute loop by wire 11 with bulb 18, outside device body 1
Side is provided with insulation crust 8, and the inner side of device body 1 scribbles antistatic backing 10.
Galvanometer 17 is installed, galvanometer 17 is connected by wire 11 with coil 15, works as electricity inside magnetic electric generating devcie 19
For weak tendency can be detected by galvanometer.
Particularly, galvanometer 17 is also associated with backboard 31, and the backboard 31 scribbles one or more distinguishing marks 32, described
Distinguishing mark 32 is preferably strip, when galvanometer is in normal operating conditions, the side long of the distinguishing mark 32 and level
The angle in face is less than Second Threshold more than first threshold, wherein, first threshold is preferably -5 °, and Second Threshold is preferably 5 °.
Detection power supply 7 is installed, detection power supply 7 is connected by wire 11 with bulb 18, can inside electric magnetisation device 9
Simply detected with to circuit.
The top of magnet 14 is provided with spring 16, and the one end of spring 16 is connected with insulation crust 8, and magnet can be helped to reply immediately soon
It is former.
Current transfer device 3 is installed, current transfer device 3 is by wire 11 and battery 20 inside electric magnetisation device 9
It is electrically connected with, the conversion of the sense of current can be carried out.
Specific embodiment：Electric magnetisation device 9 is powered when demonstrating by battery 20, and slide rheostat 4 can change
Become the size of running current, produce magnetic field to drive needle 13 to be rotated by the iron block 12 for being wound with wire 11, electric current conversion
Device 3 can be changed to the sense of current inside magnetic electric generating devcie 19, to verify the electricity produced by the electric current of different directions
Stream effect, by pressing motion bar 5 downwards when magnetic electric generating devcie 19 is demonstrated so that magnet 14 is moved back and forth inside coil 15,
Produce electric current so that bulb 18 is lighted, and galvanometer 17 can detect the highly sensitive Electromechanical indicating meters of faint electricity,
For in electric bridge, potential difference meter as nulling instrument, it can also be used to micrometer weak current, voltage and electric charge etc., when electric current more
Weak tendency can carry out detection electric current by galvanometer 17, and detection power supply 7 can be examined to the circuit inside magnetic electric generating devcie 19
Survey, prevent from influenceing experimental result due to internal circuit problem, spring 16 is upheld when motion bar 5 is pressed, when unclamping motion bar 5,
Spring 16 can help magnet 14 to reset rapidly, carry out next round experiment.
When the galvanometer in apparatus for demonstrating is permanent magnet moving coil galvanometer, it is necessary to galvanometer is kept horizontal level to reduce instead
Resisting moment, the present invention provides whether a kind of method monitoring galvanometer is horizontal：
Step 000：There is provided electromagnetism magnetic force apparatus for demonstrating as shown in embodiment one and with camera and gyroscope
Mobile phone；
Step 100：Being shot using mobile phone includes the image of at least one distinguishing mark 32；
Step 200：Split the image of the distinguishing mark 32, the gyroscope information according to mobile phone corrects the identification mark
The image of will 32；Correct when the image of the galvanometer 17 is mainly consideration mobile phone shooting and be not at horizontality in itself, easily cause
Error, so needing to be converted into image under the coordinate that mobile phone shoots in horizontality, such as mobile phone is in inverted situation
Lower shooting image, then image will entirely be overturn during amendment；
Step 300：The boundary curve of the image of distinguishing mark 32 described in obtaining step 200；
Step 400：According to the boundary curve of the distinguishing mark 32, the angle of the galvanometer 17 and horizontal plane is judged,
Specific method is：
Rectangular coordinate system of the axis of ordinates perpendicular to ground level is set up, the abscissa on the boundary curve of distinguishing mark 32 is chosen
Max min is designated as xmaxAnd xmin, it is x that abscissa on the boundary curve of galvanometer 17 is separately taken respectivelymin、xmaxPoint, its
Middle m is the number of abscissa, by User Defined, preferably 20；Chosen in every group of abscissa identical point ordinate it is maximum and
Minimum point, sum is set to n, and coordinate is designated as (x respectively1x,y1y)、(x2x,y2y)...(xnx,yny), wherein i-th point of seat
It is designated as (xix,yiy), seek the coordinate (x of the polygon center of gravity O with this n point as summito,yo), computing formula is：
Abscissa is x on the note boundary curve of distinguishing mark 32minIt is x with abscissamaxPoint be respectively X1(xmin,yX1) and
X2(xmax,yX2), the ordinate max min chosen on the boundary curve of distinguishing mark 32 is designated as ymaxAnd ymin, distinguishing mark
Ordinate is y on 32 boundary curvesminIt is y with ordinatemaxPoint be respectively Y1(xY1,ymin) and Y2(xY2,ymax), connect straight line
X1O and straight line X2O, calculates straight line X1O and straight line X2The gap E of angle between O and abscissa line1, computing formula is：
If angle gap E1Fall in intervalAmong, then connection straight line Y1O and straight line Y2O, calculates straight line Y1O
With straight line Y2The gap E of angle between O and abscissa line2, computing formula is：
If angle gap E2Fall in intervalAmong, then connection straight line X1X2And Y1Y2Intersection point A can be obtained,
Make angle X1AY1Angular bisector be designated as Z, calculate the angle of straight line Z and axis of ordinatesAs distinguishing mark 32
Side long and the angle of horizontal plane, it is also possible to be considered as the angle of galvanometer 17 and horizontal plane, computing formula is：
Calculate straight line straight line X1O and straight line X2The meaning of the gap of angle is between O and abscissa line：If angle is poor
Away from E1Fall in intervalAmong, illustrate X1,O,X23 points substantially point-blank, can be considered as distinguishing mark 32
One diagonal；If angle gap E2Fall in intervalAmong, illustrate Y1, O, Y23 points are substantially point-blank,
Another diagonal of distinguishing mark 32 can be considered as, and then the side long of distinguishing mark 32 and water can be determined according to two diagonal
Plane included angle i.e. galvanometer 17 and the angle (or referred to as angle of inclination of galvanometer 17) of horizontal plane, prevent reconnaissance mistake
The angle calcu-lation mistake for causing, it is ensured that the correctness of method, improves the efficiency of method；
By the angle for judging galvanometer 17 and horizontal plane, it may be determined that the state of galvanometer 17, if galvanometer 17 with
The angle of horizontal plane is larger, illustrates that resistance torque is larger, it is necessary to readjust position；If the angle of galvanometer 17 and horizontal plane
It is smaller, illustrate that resistance torque is suitable, can be demonstrated；Judge with the angle of horizontal plane by galvanometer 17, can be with
Determine whether apparatus for demonstrating needs adjustment again, so that the correctness of demonstration is both ensure that, and the energy apparatus for demonstrating of adjustment in time, carry
High workload efficiency.
When distinguishing mark is clear and unobstructed, it is possible to use the side long of distinguishing mark is directly as monitoring inspection stream
Count the standard at angle of inclination, but distinguishing mark a variety of causes frequently encountered in practical application and unintelligible, occur breakpoint or
It is blocked, needs further to be improved method in this case.
Further, if abscissa is x on the boundary curve of distinguishing mark 32minPoint have two or more, explanation
Distinguishing mark 32 may be blocked, and now the coordinate of distinguishing mark 32 can be modified, and modification method is：
Note abscissa is xminPoint have k, coordinate is respectively (xmin,y′1)、(xmin,y′2)...(xmin,y′k), wherein
Ordinate maximum and minimum value are respectively y 'maxWith y 'min, calculating abscissa is xminPoint ordinate average value
Wherein y 'lFor l-th abscissa is xminPoint ordinate；
Compare abscissa successively for xmiThe ordinate of the point of n and the size of ordinate average value, if average more than ordinate
The number of the point of value is equal with the number of the point less than ordinate average value, then Chosen PointAs point X1(xmin,yX1)；
If the number more than the point of ordinate average value is unequal with the number of the point less than ordinate average value, side is illustrated
Boundary's curve there may be breakpoint, and breakpoint skewness, it is x now to correct abscissaminThe ordinate of point be：
Wherein lminFor abscissa is xminAnd ordinate is less than the quantity of the point of ordinate average value, lmaxFor abscissa is
xminAnd ordinate is more than the quantity of the point of ordinate average value.
Increasing the advantage to the boundary curve coordinates compensation method of distinguishing mark 32 is：Can be unintelligible in distinguishing mark 32
Or in the case of being blocked, judge the limit coordinate on the border of distinguishing mark 32, facilitate distinguishing mark 32 and horizontal plane angle
Calculating so that this method can be applied to complicated operating environment, improve the robustness of method, fault-tolerance and calculate effect
Rate.
Step 500：If the side long of distinguishing mark 32 is more than first threshold and less than Second Threshold with the angle of horizontal plane,
So can be demonstrated, if mark 32 side long is less than first threshold or more than Second Threshold with the angle of horizontal plane, that
Again adjustment apparatus for demonstrating；
Wherein, first threshold is preferably -5 °, and Second Threshold is preferably 5 °.
It is monitored by the angle of inclination of galvanometer 16, whether the galvanometer that can quickly understand apparatus for demonstrating is in
Correct working condition, and adjustment can be carried out to galvanometer according to result, so as to ensure that the correctness of demonstration, improve
Operating efficiency.
It is obvious to a person skilled in the art that the invention is not restricted to the details of above-mentioned one exemplary embodiment, Er Qie
In the case of without departing substantially from spirit or essential attributes of the invention, the present invention can be in other specific forms realized.Therefore, no matter
From the point of view of which point, embodiment all should be regarded as exemplary, and be nonrestrictive, the scope of the present invention is by appended power
Profit requires to be limited rather than described above, it is intended that all in the implication and scope of the equivalency of claim by falling
Change is included in the present invention.Any reference in claim should not be considered as the claim involved by limitation.
Claims (6)
1. a kind of electromagnetism magnetic force apparatus for demonstrating, it is characterised in that：Including galvanometer 17, galvanometer 17 is connected with backboard 31, institute
State backboard 31 and scribble one or more distinguishing marks 32；The distinguishing mark 32 is rectangle, when galvanometer is in normal work
During state, the side long of the distinguishing mark 32 is less than Second Threshold with the angle of horizontal plane more than first threshold.
2. a kind of electromagnetism magnetic force apparatus for demonstrating according to claim 1, it is characterised in that：Including device body (1)；Its
It is characterised by：Electric magnetisation device (9) is installed, electric power storage is installed in electric magnetisation device (9) upside inside described device body (1)
Pond (20), battery (20) upside is provided with run switch (2), and the battery (20) is become by wire (11) with slip
Resistance device (4) connection, is provided with iron block (12) inside the electric magnetisation device (9), iron block (12) outside is wound with wire
(11), described wire (11) one end is connected with battery (20), and iron block (12) side is provided with needle (13), described device
Magnetic electric generating devcie (19) is installed inside body (1), magnet (14), the magnet are installed inside the magnetic electric generating devcie (19)
(14) upside is welded with motion bar (5), and coil (15) is provided with immediately below the magnet (14), and coil (15) two ends pass through
Wire (11) constitutes loop with bulb (18), and described device body (1) outside is provided with insulation crust (8), described device body
(1) inner side scribbles antistatic backing (10).
3. a kind of electromagnetism magnetic force apparatus for demonstrating according to claim 1, it is characterised in that：The electric magnetisation device (9)
Inside is provided with detection power supply (7), and detection power supply (7) is connected by wire (11) with bulb (18).
4. a kind of electromagnetism magnetic force apparatus for demonstrating according to claim 1, it is characterised in that：Magnet (14) the top peace
Equipped with spring (16), described spring (16) one end is connected with insulation crust (8).
5. electromagnetism magnetic force apparatus for demonstrating according to claim 1, it is characterised in that：The electric magnetisation device (9) is internal
Current transfer device (3) is installed, the current transfer device (3) is electrically connected with by wire (11) and battery (20).
6. the method that one kind monitors galvanometer (17) angle of inclination, it is characterised in that：
Step 000：There is provided electromagnetism magnetic force apparatus for demonstrating as described in claim 1-5 and with camera and gyroscope
Mobile phone；
Step 100：Being shot using the mobile phone includes the image of at least one distinguishing mark (32)；
Step 200：Split the image of the distinguishing mark (32), the gyroscope information according to mobile phone corrects the distinguishing mark
(32) image；
Step 300：The boundary curve of the image of distinguishing mark 32 described in obtaining step 200；
Step 400：According to the boundary curve of the distinguishing mark 32, the folder on the distinguishing mark (32) side long and horizontal plane is judged
Angle, including：
Rectangular coordinate system of the axis of ordinates perpendicular to ground level is set up, the abscissa on selection distinguishing mark (32) boundary curve is most
Big value minimum value is designated as xmaxAnd xmin, it is x that abscissa on distinguishing mark (32) boundary curve is separately taken respectivelymin、 xmaxPoint, wherein m
It is the number of abscissa；The minimum and maximum point of ordinate is chosen in every group of abscissa identical point, sum is set to n, coordinate
(x is designated as respectively1x,y1y)、(x2x,y2y)...(xnx,yny), wherein i-th point of coordinate is (xix,yiy), ask and be with this n point
Coordinate (the x of the polygon center of gravity O on summito,yo), computing formula is：
Abscissa is x on the note boundary curve of distinguishing mark 32minIt is x with abscissamaxPoint be respectively X1(xmin,yX1) and X2
(xmax,yX2), the ordinate max min chosen on the boundary curve of distinguishing mark 32 is designated as ymaxAnd ymin, distinguishing mark 32
Ordinate is y on boundary curveminIt is y with ordinatemaxPoint be respectively Y1(xY1,ymin) and Y2(xY2,ymax), connect straight line
X1O and straight line X2O, calculates straight line X1O and straight line X2The gap E of angle between O and abscissa line1, computing formula is：
If angle gap E1Fall in intervalAmong, then connection straight line Y1O and straight line Y2O, calculates straight line Y1O and straight
Line Y2The gap E of angle between O and abscissa line2, computing formula is：
If angle gap E2Fall in intervalAmong, then connection straight line X1X2And Y1Y2Intersection point A can be obtained, makees angle
X1AY1Angular bisector be designated as Z, calculate the angle of straight line Z and axis of ordinatesAs distinguishing mark (32) is long
The angle of side and horizontal plane, computing formula is：
Step 500：If distinguishing mark (32) side long is more than first threshold and less than Second Threshold with the angle of horizontal plane, that
Can be demonstrated, if mark (32) side long is less than first threshold or more than Second Threshold with the angle of horizontal plane, that
Again adjustment apparatus for demonstrating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611207943.7A CN106781913B (en) | 2016-12-23 | 2016-12-23 | A method of galvanometer tilt angle in monitoring electromagnetism magnetic force apparatus for demonstrating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611207943.7A CN106781913B (en) | 2016-12-23 | 2016-12-23 | A method of galvanometer tilt angle in monitoring electromagnetism magnetic force apparatus for demonstrating |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106781913A true CN106781913A (en) | 2017-05-31 |
| CN106781913B CN106781913B (en) | 2019-01-01 |
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| CN201611207943.7A Expired - Fee Related CN106781913B (en) | 2016-12-23 | 2016-12-23 | A method of galvanometer tilt angle in monitoring electromagnetism magnetic force apparatus for demonstrating |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109545049A (en) * | 2018-11-30 | 2019-03-29 | 湖南文理学院 | A kind of Experiment of College Physics electromagnetic field three-dimensional modelling device |
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| EP2927701A1 (en) * | 2012-11-29 | 2015-10-07 | Sirc Co., Ltd | Electrical power measurement device |
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|---|---|---|---|---|
| CN201725466U (en) * | 2009-10-21 | 2011-01-26 | 郭茂清 | Universal electromagnetic presentation box |
| CN202383906U (en) * | 2011-12-28 | 2012-08-15 | 刘庆毅 | Electromagnetic induction demonstration device |
| EP2927701A1 (en) * | 2012-11-29 | 2015-10-07 | Sirc Co., Ltd | Electrical power measurement device |
| CN204102404U (en) * | 2014-08-27 | 2015-01-14 | 孟祥义 | A kind of experiment of electromagnetism demonstration box |
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