CN2616977Y

CN2616977Y - Suspension globe

Info

Publication number: CN2616977Y
Application number: CN 03226203
Authority: CN
Inventors: 王好亮
Original assignee: Individual
Current assignee: Individual
Priority date: 2003-05-13
Filing date: 2003-05-13
Publication date: 2004-05-19
Anticipated expiration: 2013-05-13

Abstract

The utility model relates to a suspended terrestrial global, which comprise a pedestal (1), an arc bracket (2) and a globe body (3); wherein, a magnet coil (22) is arranged at an end (21) of the arc bracket (2) which is far from the pedestal (1), an iron core (23) is also arranged in the magnet coil; a permanent magnet (31) is positioned on in the upper part inside the globe body (3) in the north pole; a magnetic field produced by the iron core (23) is used to suspend the sphere (3) through the permanent magnet. The utility model also comprises a monitoring and controlling part (5) which comprises a displacement circuit (51), a comparison circuit (52) and a control circuit (53); wherein, the displacement circuit inputs a position changing signal into the comparison circuit (52) to control the movement of the globe body (3) by adjusting the current in the magnet coil (22) through the control circuit (53), and therefore, no friction exists in rotation process of the globe.

Description

Floated terrestrial globe

Technical field the utility model relates to teaching demonstration equipment, particularly has the terrestrial globe of suspension function.

The terrestrial globe that uses in the background technology teaching at present, generally be that axle by south, an arctic on the terrestrial globe supports globe sphere, this terrestrial globe will be connected with support owing to this axle, so, in the terrestrial globe rotary course, unavoidably can produce frictional resistance, influence the rotational speed and the revolution number of terrestrial globe.

The summary of the invention the purpose of this utility model is to provide a kind of Floating terrestrial globe, solves the frictional resistance problem that terrestrial globe is produced in rotary course.

Solution of the present utility model is as follows: this floated terrestrial globe, comprise base, and be fixed in the arc support on the base, the spheroid of terrestrial globe is positioned at the arch section of arc support; Described arc support is provided with solenoid away from the place, end of base, is provided with iron core in this solenoid, is the solenoid energising, and the iron core two ends form magnetic field; The position, the arctic of described spheroid internal upper part is provided with permanent magnet, because the pole polarity of the magnetic pole of permanent magnet upper surface and iron core lower surface is different, so the magnetic field that iron core produced can upwards attract spheroid by this permanent magnet and it is floated; This terrestrial globe also includes Monitoring and Controlling portion, comprising the displacement transducer that is arranged on arc support end place and be fixed on comparator circuit and control circuit in the base; The position variation signal that displacement transducer will sense spheroid converts electric signal input comparator circuit to, imports the variation of solenoid current by control circuit control through the electric signal of relatively back output.If the spheroid of this terrestrial globe is upwards floated and can not be controlled, this spheroid will continue come-up, and finally be attached to the lower surface of iron core, and this obviously is not that we are needed.So when displacement transducer senses the position of spheroid when nearer apart from iron core, its electric signal that sends will make the electric current of input solenoid reduce, suction also just reduces, spheroid under the effect of himself gravity away from iron core.And when the position that displacement transducer senses spheroid is far away apart from iron core, its electric signal that sends will make the electric current of input solenoid increase, and suction strengthens, the spheroid come-up.The continuous like this position to spheroid is adjusted, and makes the spheroid of terrestrial globe be in suitable position all the time, and keeps stable.

The utility model is owing to having adopted magnetic suspension principle manufactured place globe, so this terrestrial globe does not almost have frictional resistance in rotary course.

Description of drawings

Fig. 1 is that the master of the floated terrestrial globe of the utility model looks cross-sectional schematic.

Fig. 2 adopts the master of electromagnetism pellet type suspension terrestrial globe to look cross-sectional schematic.

Fig. 3 is the utility model electrical control synoptic diagram.

Embodiment is further understood most preferred embodiment of the present utility model by accompanying drawing.

Can be learnt that by Fig. 1 and Fig. 3 a kind of floated terrestrial globe comprises base 1, be fixed in the arc support 2 on the base 1, the spheroid 3 of terrestrial globe is positioned at the arch section of arc support 2; Described arc support 2 is provided with solenoid 22 away from 21 places, end of base 1, is provided with iron core 23 in this solenoid, is solenoid 22 energisings, and iron core 23 two ends form magnetic field; The position, the arctic of described spheroid 3 internal upper parts is provided with permanent magnet 31, because the magnetic pole of permanent magnet 31 upper surfaces and the pole polarity of iron core 23 lower surfaces are different, so the magnetic field that iron core 23 is produced can upwards attract spheroid 3 by this permanent magnet 31 and it is floated; This terrestrial globe also includes Monitoring and Controlling portion 5, comprising the displacement transducer 51 that is arranged on 21 places, arc support 2 ends and be fixed on comparator circuit 52 and control circuit 53 in the base 1; The position variation signal that displacement transducer 51 will sense spheroid 3 converts electric signal input comparator circuit 52 to, compare with standard signal, position error signal is passed to control circuit 53, and the magnitude of current of control input solenoid 22 makes spheroid 3 be back to normal place.When position that displacement transducer 51 senses spheroid 3 is nearer apart from iron core 23, its electric signal that sends will make the electric current of input solenoid 22 reduce, and suction also just reduces, spheroid 3 under the effect of himself gravity away from iron core 23.And when the position that displacement transducer 51 senses spheroid 3 is far away apart from iron core 23, its electric signal that sends will make the electric current of input solenoid 22 increase, and suction strengthens, spheroid 3 come-ups.The continuous like this position to spheroid 3 is adjusted, and makes the spheroid 3 of terrestrial globe be in the suitable position of working as all the time, and keeps stable.

Can learn that by Fig. 1 the top of described base 1 is fixed with the magnetic pallet 6 that contains magnet 61; The position, the South Pole of bottom is provided with permanent magnet 32 in the described spheroid 3; Described magnetic pallet 6 formed magnetic fields upwards hold up spheroid 3 by permanent magnet 32, and described magnet 61 selects permanent magnet.Because magnet 61 upper surface magnetic poles are identical with the lower surface pole polarity of permanent magnet 32 in the spheroid 3, both repel mutually, so spheroid 3 is upwards held up, when the downward power of repulsive force that is produced when two magnets and spheroid was in equilibrium state, 3 of spheroids were in suspended state.

Can learn that by Fig. 2 and Fig. 3 magnet 61 also can be selected electromagnetic mode for use, it includes iron core 612 and around the solenoid 611 of this iron core.Also should be fixed with displacement transducer 62 on the magnetic pallet 6 so, the electric signal of this displacement transducer output is by the variation of comparator circuit 52 and control circuit 53 control input solenoids 611 electric currents.When displacement transducer 62 senses the position of spheroid 3 when nearer apart from this sensor, just strengthen the input current of solenoid 611, spheroid 3 is pushed away magnetic pallet 6, when the position that displacement transducer 62 senses spheroid 3 is far away apart from this sensor, just reduce the input current of solenoid 611, spheroid 3 is subjected to the effect of himself gravity and falls.Constantly continue to adjust, particularly cooperate adjustment with the electromagnetic suspension control device on top, can guarantee the position stability of globe sphere, verticity is good.

Claims

1. a floated terrestrial globe comprises base (1), is fixed in the arc support (2) on the base (1), and the spheroid of terrestrial globe (3) is positioned at the arch section of arc support (2); It is characterized in that:

Described arc support (2) locates to be provided with solenoid (22) away from the end (21) of base (1), is provided with iron core (23) in this solenoid;

The position, the arctic of described spheroid (3) internal upper part is provided with permanent magnet (31), this permanent magnet upper surface polarity and solenoid (22) energising back iron core (23) lower surface polarity are different, energising solenoid (22), there is a natural attraction between the sexes with this permanent magnet for iron core (23), makes spheroid (3) float;

This terrestrial globe also includes position detection control portion (5), comprising being arranged on the displacement transducer of locating arc support (2) end (21) (51) and being fixed on base (1) interior comparator circuit (52) and control circuit (53);

The position variation signal that displacement transducer (51) will detect spheroid (3) converts electric signal input comparator circuit (52) to, compare with standard signal, position error signal is passed to control circuit (53), the magnitude of current of control input solenoid (22) makes spheroid (3) be back to normal place.

2. floated terrestrial globe according to claim 1 is characterized in that:

The top of described base (1) is fixed with the magnetic pallet (6) that contains magnet (61);

The position, the South Pole of the interior bottom of described spheroid (3) is provided with permanent magnet (32);

Described magnet (61) upper surface polarity is identical with permanent magnet (32) lower surface polarity, makes spheroid (3) upwards float.

3. floated terrestrial globe according to claim 2 is characterized in that: described magnet (61) is a permanent magnet.

4. floated terrestrial globe according to claim 2 is characterized in that: described magnet (61) includes iron core (612) and around the solenoid (611) of this iron core.

5. floated terrestrial globe according to claim 2, it is characterized in that: also be fixed with displacement transducer (62) on the described magnetic pallet (6), the electric signal of this displacement transducer output is by the magnitude of current of comparator circuit (52) and control circuit (53) control input solenoid (611).