CN109697929B

CN109697929B - Projection globe for laser pointer control type teaching demonstration

Info

Publication number: CN109697929B
Application number: CN201910080459.XA
Authority: CN
Inventors: 朱丹瑶
Original assignee: Mudanjiang Normal University
Current assignee: Mudanjiang Normal University
Priority date: 2019-01-28
Filing date: 2019-01-28
Publication date: 2021-02-12
Anticipated expiration: 2039-01-28
Also published as: CN109697929A

Abstract

The invention relates to a laser pointer control type projection globe for teaching demonstration, which comprises a globe body (1) and a base (2), wherein the equator line of the globe body (1) is provided with 360-grid longitude scales (11), a semi-annular latitude ring (12) is arranged between the south pole and the north pole of the globe body, the semi-annular latitude ring is provided with 180-grid south-north latitude scales (13), the laser pointer control type projection globe further comprises a laser pointer (3), a plurality of photosensitive elements (4), an encoder (5), a main controller (6), a memory (7) and a power supply module (8), the display screen (9), the small keyboard (10) and the projector (20), the globe sphere is provided with small holes communicated with the inside and the outside of the globe sphere, all photosensitive elements are respectively installed at the positions of the small holes, and the main controller, the memory, the power supply module, the display screen and the small keyboard are respectively installed on the base. The device is convenient to use, flexible to apply, beneficial to demonstration to students on site, large in information storage capacity and good in using effect.

Description

Projection globe for laser pointer control type teaching demonstration

Technical Field

The invention relates to a teaching aid for geography teaching, in particular to a projection globe for teaching demonstration.

Background

The globe is a common teaching aid for geography teaching, and compared with a map, the globe can demonstrate general overview and geography knowledge of the globe to students more vividly, so that the students can know the globe more directly and sensitively. However, the globe has a disadvantage in that information that can be marked on the globe is limited because it is not convenient to make the globe as large as a map, and the information cannot be marked in particular detail even with a geodesic or a large map. Although the electronic map on the network is better and better with the rapid development of the internet technology and the electronic technology, the electronic map is only higher and higher in resolution, mainly suitable for traffic and navigation, and not suitable for being used for showing detailed geographic information of humanity, physical products, altitude, climate and the like of relevant positions to students in teaching, and the demonstration effect of the electronic map on intuition is still inferior to that of a globe. At present, although people also research the globe which can associate the detailed information on the globe with the globe by using an electronic technology, the globe has the defects of inconvenient and flexible use, inconvenience in demonstration to students on a teaching site, small information storage capacity and the like, and the popularization and the application of the electronic globe are hindered.

Disclosure of Invention

The invention aims to provide a projection globe for laser pointer control type teaching demonstration, which is convenient and flexible to use, convenient to demonstrate to students on a teaching site and large in information storage capacity.

The technical solution of the invention is as follows: it includes globe sphere and base with world map drawn on the surface, the south pole and north pole of globe sphere are respectively matched with two ends of semi-ring supporting arm mounted on the base, the equator line of globe sphere is equipped with 360-grid longitude scale matched with longitude line, between the south pole and north pole of globe sphere a semi-ring latitude ring whose two ends are respectively matched with south pole and north pole of globe sphere and two ends of semi-ring supporting arm is set, the inner arc side of semi-ring latitude ring is matched with outer surface of globe sphere, and on the ring body from equator position to two pole position respectively 90-grid south-north latitude scale matched with latitude line of globe sphere is set, it also includes laser pointer, several photosensitive elements, coder, main controller, memory, power supply module, display screen, small keyboard and projector, and on the globe sphere a portion marked with geographical name is respectively equipped with small hole communicated with interior and exterior of globe sphere, each photosensitive element is respectively arranged in the globe body and is arranged at the position of each small hole, the photosensitive surface of each photosensitive element is respectively exposed out of the globe body through the small holes and is matched with the laser pointer, the encoder is arranged in the globe body and is respectively connected with each photosensitive element through a lead, a slip ring carbon brush assembly is arranged at the position where the south pole of the globe body is rotationally matched with the semi-annular supporting arm, the encoder is connected with each slip ring of the slip ring carbon brush assembly through the lead, the main controller is arranged on the base and is connected with each carbon brush of the slip ring carbon brush assembly through the lead, the memory, the power supply module, the display screen and the keypad are respectively arranged on the base, the memory, the display screen and the keypad are respectively connected with the main controller, the memory and the display screen, the power supply module is respectively connected with the encoder arranged in, the projector is positioned outside the base and is respectively connected with the main controller and the power module through flexible wires.

The invention has the technical effects that: the device is convenient to use, flexible to apply, beneficial to demonstration to students on site, large in information storage capacity and good in using effect. The laser pointer stores a large amount of geographic information in the memory, and after laser beams of the laser pointer are projected to a photosensitive element at an indicated position or longitude and latitude data of a geographic position to be inquired are input through a small keyboard, the detailed geographic information of the corresponding geographic position stored in the memory can be directly displayed by the display screen and the projector, so that students can conveniently associate the geographic position on the globe with the related geographic information, the memory effect is more solid, and teaching is facilitated for students or teachers and students to interact. The demonstration and the use are very flexible and convenient, the actual effect of the geography teaching can be greatly improved, and great convenience can be brought to geography teaching workers.

Drawings

FIG. 1 is a schematic structural diagram of an embodiment of the present invention;

fig. 2 is a schematic block diagram of an embodiment of the present invention.

Detailed Description

As shown in figures 1 and 2, the globe comprises a globe body 1 and a base 2, the surface of which is provided with a world map, the south pole and the north pole of the globe body 1 are respectively matched with the two ends of a semi-annular supporting arm 21 arranged on the base 2 in a rotating way, the equator line of the globe body 1 is provided with 360-grid longitude scales 11 matched with the longitude lines, a semi-annular latitude ring 12 is arranged between the south pole and the north pole of the globe body 1, the two ends of the semi-annular latitude ring are respectively matched with the south pole and the north pole of the globe body 1 in a rotating way, the inner arc side of the semi-annular latitude ring 12 is matched with the outer surface of the globe body 1, the ring body is provided with 90-grid south latitude scales 13 matched with the latitude lines of the globe body 1 from the equator position to the two poles, the globe body further comprises a laser pointer 3, a plurality of photosensitive elements, The laser pointer comprises a memory 7, a power supply module 8, a display screen 9, a keypad 10 and a projector 20, wherein the positions of a part of the globe body 1 marked with geographical names are respectively provided with small holes 14 communicated with the inside and the outside of the globe body 1, each photosensitive element 4 is respectively positioned in the globe body 1 and is arranged at the position of each small hole 14, the photosensitive surface of each photosensitive element is respectively exposed out of the globe body 1 through the small holes 14 and is matched with a laser pointer 3, an encoder 5 is arranged in the globe body 1 and is respectively connected with each photosensitive element 4 through a lead wire, a slip ring carbon brush assembly 15 is arranged at the position where the south pole of the globe body 1 is rotationally matched with a semi-annular supporting arm 21, the encoder 5 is connected with each slip ring of the carbon brush assembly 15 through a lead wire, a main controller 6 is arranged on a base 2 and is connected with each carbon brush of the slip ring carbon brush assembly 15 through a lead wire, the, memory 7, display screen 9 and keypad 10 link to each other with main control unit 6 respectively, and power module 8 links to each other with main control unit 6, memory 7 and display screen 9 respectively, and power module 8 passes through wire and sliding ring carbon brush assembly 15 and links to each other with the encoder 5 of installing in globe spheroid 1, and projector 20 is located the base 2 outside, links to each other respectively with main control unit 6 and power module 8 through the flexible conductor.

A power switch 22 and a power indicator lamp 23 are arranged on the front vertical surface of the base 2, the input end of the power switch 22 is connected with a power line 25 of which the other end is provided with a plug 24, the output end is connected with the power module 8, and the power indicator lamp 23 is connected with the two output ends of the power switch 22 in parallel.

The side vertical surface of the base 2 is provided with a laser pointer hoop 26 which is used for fixing the laser pointer 3 and has an elastic opening in the side direction.

A display 9 and keypad 10 are provided on the front elevation of the base 2.

The keypad 10 is provided with an east longitude e (east) key, a west longitude w (west) key, a north latitude n (north) key, a south latitude s (south) key, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 numeric keys, an up page key PgUp, a down page key PgDn, a delete ← key, a Clear screen Clear key, and an Enter key.

The laser pointer 3 is provided with a jog switch.

Slip rings of the slip ring carbon brush assembly 15 are axially spaced and arranged on a rotating shaft in rotating fit with the globe body 1 and the semi-annular supporting arm 21, and carbon brushes of the slip ring carbon brush assembly 15 are matched with the slip rings and arranged on the semi-annular supporting arm 21 of the base 2.

Four slip rings and four carbon brushes respectively matched with the slip rings are arranged on the slip ring carbon brush assembly 15, two slip rings and two carbon brushes are used for connecting the encoder 5 and the power module 8 and are used for providing power for the encoder 5, and the other two slip rings and the other two carbon brushes are used for connecting the encoder 5 and the main controller 6 and are used for transmitting position coding signals to the main controller 6.

The positions marked with geographical names on the globe body 1 are continents, oceans, countries, capital, major cities, rivers, mountains, deserts, plateaus, basins, plains, equators, south gyrus lines, north gyrus lines, south polar rings, north polar rings, symbolic geographical positions and the like. The detailed geographic information includes the geography, materials, elevation, climate, traffic, longitude, latitude, etc. of the geographic location.

The laser pointer 3 is a low-power-consumption low-intensity laser pointer, the photosensitive element 4 is a photosensitive diode, the encoder 5 is a photoelectric encoder, the main controller 6 is a Programmable Logic Controller (PLC), the memory 7 is a magnetic medium memory, the power module 8 is a multi-output alternating current/direct current (AC/DC) power module, the display screen 9 is a Liquid Crystal Display (LCD), the keypad 10 is a digital keypad, and the projector 20 is a Digital Light Processing (DLP) projector.

The use method and the working principle are as follows:

before use, the projector 20 is installed in place, the projector 20 is connected with the output interface of the main controller 6 in the base 2 and the power module 8 through flexible wires, then the plug 24 of the power line 25 is inserted into a socket, and after the power switch 22 is turned on, the projector can be used after the display screen 9 and the projector 20 are displayed normally.

After the globe sphere 1 is rotated to a proper position, the jog switch of the laser pointer 3 is turned on, a laser beam of the laser pointer is projected to the photosensitive element 4 of a geographical name position to be searched, the photosensitive element 4 transmits a signal to the encoder 5, the encoder 5 generates a set position code and transmits the position code to the main controller 6 through the slip ring carbon brush assembly 15, the main controller 6 extracts detailed geographical information of an address corresponding to the position code stored in the memory 7 according to the position code and displays the geographical information through the display screen 9 and the projector 20 for teachers to teach and students to learn, and when the information amount is more than that of one screen display, the page turning can be displayed up and down through the page turning key PgUp and the page turning key PgDn.

Instead of using the laser pointer 3 for indication, the longitude and latitude of the photosensitive element 4 of the geographical name position to be searched can be identified by rotating the globe sphere 1 and the semi-annular latitude ring 12, the longitude and latitude of the photosensitive element 4 of the geographical name position to be searched can be identified by 360 grids of longitude scales 11 on the equator line of the globe sphere 1 and 180 grids of north and south latitude scales 13 on the semi-annular latitude ring, the longitude and latitude of the position can be input into the main controller 6 through the keypad 10, the display screen 9 can display four-digit longitude and three-digit latitude information E (W) × N (e.g. E110N50 (50 degrees north latitude of 110 degrees east longitude), W085S52 (52 degrees south latitude of 85 degrees west longitude), the latitude on the equator line is 000, the longitude on the initial meridian is 0000), the vehicle-returning key is pressed after the input is finished, the detailed geographical information of the corresponding address which is stored in the memory 7 and is consistent with or closest to the position can be extracted, and displayed through the display screen 9 and the projector 20 for teachers to teach and students to learn. Due to space limitation, the photosensitive elements 4 cannot be installed on all geographical names on the globe body 1, and some geographical name positions without the photosensitive elements 4 can be searched for the geographical information stored in the memory 7 by inputting longitude and latitude to obtain a larger amount of information.

When the power switch 22 is turned off and detailed information is not required to be called for demonstration, the power switch can be used like a common globe, the laser pointer 3 can be used for indicating the relevant position on the globe body 1, or 360-grid longitude scales 11 on the equator line of the globe body 1 and 180-grid north-south latitude scales 13 on a semi-annular latitude ring are used for teaching relevant information, and the good teaching purpose can be achieved.

Claims

1. Laser teacher's pointer controls formula teaching demonstration and uses projection globe, it includes that the surface draws globe spheroid (1) and base (2) that have the world map, and the south pole and the north pole position of globe spheroid (1) respectively with install the both ends looks normal running fit of semi-circular support arm (21) on base (2), its characterized in that: be equipped with on the equator line of globe spheroid (1) with warp matched with 360 check longitude scale (11), be equipped with between the south pole of globe spheroid (1) and the north pole both ends respectively with the south pole of globe spheroid (1), half annular latitude ring (12) of both ends looks normal running fit of north pole position and half annular support arm (21), the inner arc side of half annular latitude ring (12) cooperatees with the surface of globe spheroid (1), be equipped with respectively with 90 check south north latitude degree scales (13) of globe spheroid (1) latitude line matched with from the equator position to two poles of the earth position on the ring body, it still includes laser pointer (3), a plurality of photosensitive element (4), encoder (5), main control unit (6), memory (7), power module (8), display screen (9), keypad (10) and projecting apparatus (20), the position that partly mark has geographical name on globe spheroid (1) is equipped with respectively inside and outside the intercommunication spheroid (1) The laser pointer comprises small holes (14), all photosensitive elements (4) are respectively arranged in a globe body (1) and are arranged at the positions of the small holes (14), the photosensitive surfaces of the photosensitive elements are respectively exposed out of the globe body (1) through the small holes (14) and are matched with a laser pointer (3), an encoder (5) is arranged in the globe body (1) and is respectively connected with all the photosensitive elements (4) through wires, a slip ring assembly (15) is arranged at the position where the south pole of the globe body (1) is rotationally matched with a semi-annular supporting arm (21), the encoder (5) is connected with all slip rings of the slip ring carbon brush assembly (15) through wires, a main controller (6) is arranged on a base (2) and is connected with all the carbon brushes of the slip ring carbon brush assembly (15) through wires, a memory (7), a power supply module (8), a display screen (9) and a small keyboard (10) are respectively arranged on the base, the storage (7), the display screen (9) and the keypad (10) are respectively connected with the main controller (6), the keypad (10) is provided with an east longitude E key, a west longitude W key, a north latitude N key, a south latitude S key, 0, 1, 2, 3, 4, 5, 6, 7, 8 and 9 number keys, the keypad (10) is used for inputting the longitude and latitude of the geographical name position to be searched into the main controller (6), searching the geographical information stored in the storage (7) of the position and displaying the geographical information through the display screen (9) and the projector (20), the longitude is identified through a 360-grid longitude scale (11) on the equator line of the globe sphere (1), the latitude is identified through a 180-grid south-north latitude scale (13) on the semi-annular latitude ring (12), the power supply module (8) is respectively connected with the main controller (6), the storage (7) and the display screen (9), the power module (8) is connected with the encoder (5) installed in the globe body (1) through a wire and a slip ring carbon brush assembly (15), and the projector (20) is located outside the base (2) and is respectively connected with the main controller (6) and the power module (8) through flexible wires.

2. The laser pointer-controlled projection globe for teaching and demonstration according to claim 1, characterized in that a power switch (22) and a power indicator lamp (23) are arranged on the front vertical surface of the base (2), the input end of the power switch (22) is connected with a power line (25) with a plug (24) at the other end, the output end is connected with the power module (8), and the power indicator lamp (23) is connected in parallel with the two output ends of the power switch (22).

3. The laser pointer operated projection globe for teaching demonstration according to claim 1, characterized in that the side elevation of the base (2) is provided with a laser pointer clamp (26) with a lateral elastic opening for fixing the laser pointer (3).

4. The laser pointer operated projection globe for teaching demonstration according to claim 1, characterized in that the display screen (9) and the keypad (10) are provided on the front elevation of the base (2).

5. The laser pointer operated projection globe for teaching demonstration as claimed in claim 1, characterized in that the laser pointer (3) is provided with a jog switch.

6. The laser pointer operated projection globe for teaching demonstration according to claim 1, characterized in that the slip rings of the slip ring carbon brush assembly (15) are respectively installed on the rotating shaft of the globe body (1) rotationally matched with the semi-annular supporting arm (21) at intervals in the axial direction, and the carbon brushes of the slip ring carbon brush assembly (15) are respectively installed on the semi-annular supporting arm (21) of the base (2) in matched with the slip rings.

7. The laser pointer operated projection globe for teaching demonstration according to claim 1, wherein four slip rings and four carbon brushes respectively matched with the slip rings are arranged on the slip ring carbon brush assembly (15), two slip rings and two carbon brushes are used for connecting the encoder (5) and the power module (8) for supplying power to the encoder (5), and the other two slip rings and the other two carbon brushes are used for connecting the encoder (5) and the main controller (6) for transmitting position encoding signals to the main controller (6).