CN106530912B - Laser oscillography type sound wave demonstration device - Google Patents

Abstract

The laser oscillography type sound wave demonstration device comprises a speed regulation knob, a speed regulation potentiometer, a laser pen rotating shaft, a flat panel loudspeaker, a cylindrical reflector, a plane reflector, emergent light, first reflected light, second reflected light, an angle regulation knob, a sawtooth wheel, a speed reduction motor, a language music piece and a transistor, wherein the laser pen, the emergent light, the plane reflector, the cylindrical reflector, the first reflected light and the second reflected light form an optical part, a voice coil, a flat paper cone and the cylindrical reflector form a vertical direction display part, the speed regulation knob, the speed regulation potentiometer, the speed reduction motor, the sawtooth wheel, an ejector rod, a reset spring and the laser pen form a horizontal direction scanning part.

Description

Laser oscillography type sound wave demonstration device

Technical Field

The invention relates to a sound wave vibration demonstration instrument, in particular to an oscillography type sound wave demonstration device, and belongs to the technical field of teaching instruments.

Background

In physical teaching, the law of sound wave vibration is explained mainly by a teacher's point-by-point drawing method, then the simulation is carried out by a mechanical vibrator mould, thirdly the display is carried out by means of a teaching oscilloscope, fourthly the simulation is carried out by means of a computer and a projector, the former two methods have the defects of abstract content and being boring and tasteless, and the third method is difficult for students in back rows to watch because the oscilloscope screen is small, and the fourth method is high in cost and troublesome to operate and needs a computer and a projector, and because related sounding objects do not participate directly, the students are easy to feel like manual work and the intuition is still weak.

Disclosure of Invention

The invention aims to provide a laser oscillography type sound wave demonstration device which has the advantages of simple structure, low manufacturing cost, portability, easy operation, direct participation of sound production objects and larger waveform display size.

The technical problem to be solved by the invention is realized by the following technical scheme: the laser oscillography type sound wave demonstration device comprises a bottom plate foot (1), a speed regulation knob (2), a flat loudspeaker (3), a folding shoulder (4), a loudspeaker opening part (5), a rubber pad (6), a corrugated edge (7), a flat cone (8), second reflected light (9), a magnet (10), an upper clamping plate (11), a cylindrical reflector (12), a voice coil (13), first reflected light (14), a shock pad (15), a motor rotating shaft (16), a plane reflector (17), a reflector rotating shaft (18), an angle regulation knob (19), emergent light (20), an emergent light opening (21), a reflector bracket (22), a sawtooth wheel (23), a laser pen (24), a laser pen bracket (25), a laser pen rotating shaft (26), a rotating shaft bracket (27), a rotating shaft base (28), a speed reduction motor (29), a language sheet (30), a transistor (31), a screw (32), a bottom plate groove (33), a battery pack (34), a central column (35), a lower clamping plate (36), a loudspeaker bottom plate (37), a bottom plate (38), a potentiometer (39), a battery box (40), a speed regulation switch (41), a rocker spring (42), a reset spring (43), a rocker spring (43), a reset spring (34), a spring (43), a spring (a spring and a spring (c), A top bar (44) and an opening (45).

The laser pen (24), the emergent light (20), the plane reflector (17), the first reflected light (14), the cylindrical reflector (12) and the second reflected light (9) form an optical part, the voice coil (13), the flat cone (8) and the cylindrical reflector (12) form a vertical direction display part, and the speed regulation knob (2), the speed regulation potentiometer (39), the speed reduction motor (29), the sawtooth wheel (23), the ejector rod (44), the reset spring (42) and the laser pen (24) form a horizontal direction scanning part.

Bottom plate recess (33) and flat speaker (3) are equipped with to bottom plate (38) top, speaker bottom (37) imbed in bottom plate recess (33), flat cone (8) top central point puts and is equipped with cylinder speculum (12), bottom plate (38) left side top is equipped with speed governing knob (2) and rocker switch (41), bottom plate (38) left side below is equipped with speed governing potentiometre (39), bottom plate (38) right side top is equipped with shock pad (15) and speculum support (22), shock pad (15) top is equipped with gear motor (29), gear motor (29) right side is equipped with sawtooth wheel (23), sawtooth wheel (23) are connected with gear motor (29) through motor shaft (16), speculum support (22) top is equipped with plane mirror (17) and angle adjustment knob (19), plane mirror (17) are connected with angle adjustment knob (19) through speculum shaft (18).

Bottom plate (38) right side is equipped with opening (45) that are used for inserting laser pen (24), bottom plate (38) right side below is equipped with language music piece (30) and pivot base (28), pivot base (28) top is equipped with pivot support (27), laser pen support (25) and can make laser pen support (25) pivot pivoted laser pen pivot (26), laser pen support (25) bottom is connected with laser pen pivot (26), laser pen support (25) top is connected with laser pen (24) bottom, laser pen (24) waist one side is equipped with ejector pin (44), the one end top of ejector pin (44) is on serrated wheel (23), laser pen (24) waist opposite side is equipped with reset spring (42) and spring bracket (43), spring bracket (43) bottom is fixed in bottom plate (38) top.

The surface of the cylindrical reflector (12) is plated with chromium and is bent into a copper foil with an inverted U-shaped cross section, the thickness of the copper foil is 0.1mm, the plane reflector (17) is made of mirror surface stainless steel and is 0.5mm, the light path advancing direction sequentially comprises an emergent light port (21), emergent light (20), the plane reflector (17), first reflected light (14), the cylindrical reflector (12) and second reflected light (9), the rotating speed of a motor rotating shaft (16) of a speed reducing motor (29) in direct current 6V is 300 revolutions per minute, the number of teeth of a saw-toothed wheel (23) is 3, the caliber of a flat panel loudspeaker (3) is 120mm, the rated power is 1W, the impedance is 16 omega, and the corrugated edge (7) is a rubber edge.

When the flat panel loudspeaker (3) produces sound, the flat panel cone (8) drives the cylindrical surface reflector (12) to vibrate up and down, different angles are formed between the arc surface and the arc surface tangent line of different positions of the cylindrical surface reflector (12) when the first reflected light (14) irradiates, different angles are formed between the generated second reflected light (9) and the arc surface tangent line, the cylindrical surface reflector (12) plays a role in amplifying the convex mirror between the second reflected light (9) and the first reflected light (14), the light path of the first reflected light (14) is short, the light path of the second reflected light (9) projected on a wall surface or a screen is long, and the vibration amplitude of a laser projection point formed by the vibration amplitude of the flat panel cone (8) on the wall surface or the screen is amplified in the vertical direction according to the convex mirror principle and the optical lever principle.

When the reducing motor (29) rotates, the motor rotating shaft (16) drives the sawtooth wheel (23) to rotate clockwise, the laser pen (24) periodically swings around the laser pen rotating shaft (26) through the transmission of the ejector rod (44), namely, the emergent light port (21) makes sawtooth regular motion, so that the laser projection point after the emergent light (20) is reflected by the plane reflector (17) and the cylindrical reflector (12) is unfolded in the horizontal direction, and the horizontal motion and the vertical motion are synthesized to form a sound waveform on a wall surface or a screen.

Due to the adoption of the technical scheme, the invention has the advantages and positive effects that: the laser oscillography type sound wave demonstration device has the characteristics of simple structure, portability, easy operation, low manufacturing cost, sound production physical participation, large waveform display size, strong intuition and the like, is suitable for classroom demonstration of physical teaching, and plays a positive role in enhancing the learning interest of students and deepening the impression of the motion law of sound waves.

Drawings

The invention is further illustrated with reference to the following figures and examples, the invention having the following 4 figures:

figure 1 is a front view of the present invention,

figure 2 is a right side view of one of the present inventions,

figure 3 is a second right side view of the present invention,

fig. 4 is a schematic diagram of a portion of the circuit of the present invention.

The numbers indicated in the figures represent the following, respectively:

1. the loudspeaker comprises a baseplate foot, 2 parts of a speed regulation knob, 3 parts of a flat loudspeaker, 4 parts of a folding shoulder, 5 parts of a loudspeaker opening, 6 parts of a rubber pad, 7 parts of a corrugated edge, 8 parts of a flat paper cone, 9 parts of second reflected light, 10 parts of a magnet, 11 parts of an upper clamping plate, 12 parts of a cylindrical reflector, 13 parts of a voice coil, 14 parts of first reflected light, 15 parts of a shock pad, 16 parts of a motor rotating shaft, 17 parts of a plane reflector, 18 parts of a reflector rotating shaft, 19 parts of an angle regulation knob, 20 parts of emergent light, 21 parts of an emergent light opening, 22 parts of a reflector bracket, 23 parts of a sawtooth wheel, 24 parts of a laser pen, 25 parts of a laser pen bracket, 26 parts of a laser pen rotating shaft, 27 parts of a rotating shaft bracket, 28 parts of a rotating shaft base, 29 parts of a speed reduction motor, 30 parts of a music sheet, 31 parts of a transistor, 32 parts of a screw, 33 parts of a baseplate groove, 34 parts of a battery pack, 35 parts of a central column, 36 parts of a lower clamping plate, 37 parts of a bottom part of a bottom plate, 38 parts of a baseplate, 39 parts of a potentiometer, 40 parts of a battery box, 41 parts of a switch, 42 parts of a reset spring, a reset spring bracket, a reset spring, and a rotating direction opening of a rocker pin, and a push rod.

Detailed Description

1. According to the figures 1 to 3, the laser oscillography type sound wave demonstration device comprises a bottom plate foot (1), a speed regulation knob (2), a flat speaker (3), a folding shoulder (4), a speaker opening (5), a rubber pad (6), a corrugated edge (7), a flat cone (8), second reflected light (9), a magnet (10), an upper clamping plate (11), a cylindrical reflector (12), a voice coil (13), first reflected light (14), a shock pad (15), a motor rotating shaft (16), a plane reflector (17), a reflector rotating shaft (18), an angle regulation knob (19), emergent light (20), an emergent light opening (21), a reflector bracket (22), a saw-toothed wheel (23), a laser pen (24), a laser pen bracket (25), a laser pen rotating shaft (26), a rotating shaft bracket (27), a rotating shaft base (28), a speed reduction motor (29), a language music sheet (30), a transistor (31), a screw (32), a bottom plate groove (33), a battery pack (34), a central column (35), a lower clamping plate (36), a speaker bottom (37), a bottom plate (38), a potentiometer (39), a speed regulation switch (40), a battery box (41), a rocker reset spring (42), and a rocker reset spring (42), A spring bracket (43), a top rod (44) and an opening (45).

2. The laser pen (24), the emergent light (20), the plane reflector (17), the first reflected light (14), the cylindrical reflector (12) and the second reflected light (9) form an optical part, the voice coil (13), the flat cone (8) and the cylindrical reflector (12) form a vertical direction display part, and the speed regulation knob (2), the speed regulation potentiometer (39), the speed reduction motor (29), the sawtooth wheel (23), the ejector rod (44), the reset spring (42) and the laser pen (24) form a horizontal direction scanning part.

3. Bottom plate recess (33) and flat speaker (3) are equipped with to bottom plate (38) top, speaker bottom (37) imbed in bottom plate recess (33), flat cone (8) top central point puts and is equipped with cylinder speculum (12), bottom plate (38) left side top is equipped with speed governing knob (2) and rocker switch (41), bottom plate (38) left side below is equipped with speed governing potentiometre (39), bottom plate (38) right side top is equipped with shock pad (15) and speculum support (22), shock pad (15) top is equipped with gear motor (29), gear motor (29) right side is equipped with sawtooth wheel (23), sawtooth wheel (23) are connected with gear motor (29) through motor shaft (16), speculum support (22) top is equipped with plane mirror (17) and angle adjustment knob (19), plane mirror (17) are connected with angle adjustment knob (19) through speculum shaft (18).

4. Bottom plate (38) right side is equipped with opening (45) that are used for inserting laser pen (24), bottom plate (38) right side below is equipped with language music piece (30) and pivot base (28), pivot base (28) top is equipped with pivot support (27), laser pen support (25) and can make laser pen support (25) pivot pivoted laser pen pivot (26), laser pen support (25) bottom is connected with laser pen pivot (26), laser pen support (25) top is connected with laser pen (24) bottom, laser pen (24) waist one side is equipped with ejector pin (44), the one end top of ejector pin (44) is on serrated wheel (23), laser pen (24) waist opposite side is equipped with reset spring (42) and spring bracket (43), spring bracket (43) bottom is fixed in bottom plate (38) top.

5. The surface of the cylindrical reflector (12) is plated with chromium and is bent into a copper foil with an inverted U-shaped cross section, the thickness of the copper foil is 0.1mm, the plane reflector (17) is made of mirror surface stainless steel and is 0.5mm, the light path advancing direction sequentially comprises an emergent light port (21), emergent light (20), the plane reflector (17), first reflected light (14), the cylindrical reflector (12) and second reflected light (9), the rotating speed of a motor rotating shaft (16) of a speed reducing motor (29) in direct current 6V is 300 revolutions per minute, the number of teeth of a saw-toothed wheel (23) is 3, the caliber of a flat panel loudspeaker (3) is 120mm, the rated power is 1W, the impedance is 16 omega, and the corrugated edge (7) is a rubber edge.

6. When the flat panel loudspeaker (3) produces sound, the flat panel cone (8) drives the cylindrical surface reflector (12) to vibrate up and down, different angles are formed between the arc surface and the arc surface tangent line of different positions of the cylindrical surface reflector (12) when the first reflected light (14) irradiates, different angles are formed between the generated second reflected light (9) and the arc surface tangent line, the cylindrical surface reflector (12) plays a role in amplifying the convex mirror between the second reflected light (9) and the first reflected light (14), the light path of the first reflected light (14) is short, the light path of the second reflected light (9) projected on a wall surface or a screen is long, and the vibration amplitude of a laser projection point formed by the vibration amplitude of the flat panel cone (8) on the wall surface or the screen is amplified in the vertical direction according to the convex mirror principle and the optical lever principle.

7. When the speed reducing motor (29) rotates, the motor rotating shaft (16) drives the sawtooth wheel (23) to rotate clockwise, the laser pen (24) periodically swings around the laser pen rotating shaft (26) through the transmission of the ejector rod (44), namely, the emergent light port (21) makes sawtooth regular motion, so that the laser projection point of emergent light (20) is unfolded in the horizontal direction after being reflected by the plane reflector (17) and the cylindrical reflector (12), and the laser projection point forms a sound waveform on a wall surface or a screen after the horizontal direction motion and the vertical direction motion are synthesized.

8. Fig. 2 shows that the left end of the push rod (44) is located at the valley point of the sawtooth wheel (23) so that the light exit port (21) is located at the left side of the mirror holder (22), and fig. 3 shows that the left end of the push rod (44) is located at the peak point of the sawtooth wheel (23) so that the light exit port (21) is located at the right side of the mirror holder (22).

9. When the laser pen is used, a button of the laser pen (24) is changed into a button switch, the laser pen (24) is powered by an internal battery, and according to the figure 4, the battery pack (34) is connected with the speed reducing motor (29) through the rocker switch (41) and the speed regulating potentiometer (39); the battery pack (34) is connected with the power end of the language music piece (30) through a rocker switch (41), and the output end of the language music piece (30) is connected with the flat panel loudspeaker (3) through a transistor (31).

10. When the voice-frequency-modulation laser pen is used, a button switch and a rocker switch (41) of the laser pen (24) are turned on, the laser pen (24), a speed reducing motor (29), a voice music piece (30) and a transistor (31) work, a flat panel loudspeaker (3) produces sound, a reflector (17) is adjusted through an adjusting knob (19) to enable first reflected light (14) to accurately irradiate on a cylindrical reflector (12) and enable second reflected light (9) to irradiate on a wall surface or a screen, different voices or different music signals emitted by the flat panel loudspeaker (3) are enabled according to the voice music piece (30), and a speed adjusting knob (2) is adjusted to enable the speed reducing motor (29) to have a proper rotating speed, namely, the waveform displayed on the wall surface or the screen has a proper period number.

Claims (1)

1. A laser oscillography type sound wave demonstration device comprises a bottom plate foot (1), a speed regulation knob (2), a flat loudspeaker (3), a folding shoulder (4), a loudspeaker opening part (5), a rubber pad (6), a corrugated edge (7), a flat paper cone (8), second reflected light (9), a magnet (10), an upper clamping plate (11), a cylindrical reflector (12), a voice coil (13), first reflected light (14), a shock pad (15), a motor rotating shaft (16), a planar reflector (17), a reflector rotating shaft (18), an angle regulation knob (19), emergent light (20), an emergent light opening (21), a reflector bracket (22), a sawtooth wheel (23), a laser pen (24), a laser pen bracket (25), a laser pen rotating shaft (26), a rotating shaft bracket (27), a rotating shaft base (28), a speed reduction motor (29), a language music sheet (30), a transistor (31), a screw (32), a bottom plate groove (33), a battery pack (34), a center column (35), a lower clamping plate (36), a loudspeaker bottom (37), a bottom plate (38), a speed regulation potentiometer (39), a speed regulation switch (40), a battery box (41), a rocker spring (42), and a reset spring (42), A spring support (43), a top rod (44) and an opening (45);

the laser pen (24), the emergent light (20), the plane reflector (17), the first reflected light (14), the cylindrical reflector (12) and the second reflected light (9) form an optical part, the voice coil (13), the flat cone (8) and the cylindrical reflector (12) form a vertical direction display part, and the speed regulation knob (2), the speed regulation potentiometer (39), the speed reduction motor (29), the sawtooth wheel (23), the ejector rod (44), the reset spring (42) and the laser pen (24) form a horizontal direction scanning part;

the method is characterized in that: a bottom plate groove (33) and a flat plate loudspeaker (3) are arranged above a bottom plate (38), the bottom (37) of the loudspeaker is embedded into the bottom plate groove (33), a cylindrical reflector (12) is arranged at the center position above a flat plate type cone (8), a speed regulation knob (2) and a rocker switch (41) are arranged above the left side of the bottom plate (38), a speed regulation potentiometer (39) is arranged below the left side of the bottom plate (38), a shock pad (15) and a reflector bracket (22) are arranged above the right side of the bottom plate (38), a speed reduction motor (29) is arranged above the shock pad (15), a sawtooth wheel (23) is arranged on the right side of the speed reduction motor (29), the sawtooth wheel (23) is connected with the speed reduction motor (29) through a motor rotating shaft (16), a plane reflector (17) and an angle regulation knob (19) are arranged at the top of the reflector bracket (22), and the plane reflector (17) is connected with the angle regulation knob (19) through a reflector rotating shaft (18);

an opening (45) for inserting a laser pen (24) is formed in the right side of the bottom plate (38), a language music piece (30) and a rotating shaft base (28) are arranged below the right side of the bottom plate (38), a rotating shaft support (27) is arranged above the rotating shaft base (28), a laser pen support (25) and a laser pen rotating shaft (26) capable of enabling the laser pen support (25) to rotate around a shaft are arranged, the bottom of the laser pen support (25) is connected with the rotating shaft (26) of the laser pen, the top of the laser pen support (25) is connected with the bottom of the laser pen (24), a push rod (44) is arranged on one side of the waist of the laser pen (24), one end of the push rod (44) pushes against the sawtooth wheel (23), a reset spring (42) and a spring support (43) are arranged on the other side of the waist of the laser pen (24), and the bottom of the spring support (43) is fixed above the bottom plate (38);

when the flat panel loudspeaker (3) produces sound, the flat panel cone (8) drives the cylindrical surface reflector (12) to vibrate up and down, the first reflected light (14) irradiates on the arc surface at different positions of the cylindrical surface reflector (12) to form different angles with the tangent of the arc surface, different angles are formed between the generated second reflected light (9) and the tangent of the arc surface, the cylindrical surface reflector (12) plays a role in amplifying the convex mirror between the second reflected light (9) and the first reflected light (14), the light path of the first reflected light (14) is short, the light path of the second reflected light (9) projected on the wall surface or the screen is long, and the vibration amplitude of the laser projection point formed by the vibration amplitude of the flat panel cone (8) on the wall surface or the screen is amplified in the vertical direction according to the convex mirror principle and the optical lever principle;

when the speed reducing motor (29) rotates, the motor rotating shaft (16) drives the sawtooth wheel (23) to rotate clockwise, the laser pen (24) periodically swings around the laser pen rotating shaft (26) through the transmission of the ejector rod (44), namely, the emergent light port (21) makes sawtooth regular motion, so that the laser projection point of emergent light (20) is unfolded in the horizontal direction after being reflected by the plane reflector (17) and the cylindrical reflector (12), and the laser projection point forms a sound waveform on a wall surface or a screen after the horizontal direction motion and the vertical direction motion are synthesized;

when the flat panel loudspeaker (3) sounds, the reflector (17) is adjusted through the adjusting knob (19) to enable the first reflected light (14) to accurately irradiate on the cylindrical reflector (12) and enable the second reflected light (9) to irradiate on a wall surface or a screen, and the speed adjusting knob (2) is adjusted to enable the speed reducing motor (29) to have a proper rotating speed according to different voices or different music signals emitted by the flat panel loudspeaker (3) through the voice music piece (30), namely, a waveform displayed on the wall surface or the screen has a proper period number;

the surface of the cylindrical reflector (12) is plated with chromium and is bent into a copper foil with an inverted U-shaped cross section, the thickness of the copper foil is 0.1mm, the plane reflector (17) is made of mirror surface stainless steel and is 0.5mm, the light path advancing direction sequentially comprises an emergent light port (21), emergent light (20), the plane reflector (17), first reflected light (14), the cylindrical reflector (12) and second reflected light (9), the rotating speed of a motor rotating shaft (16) of a speed reducing motor (29) in direct current 6V is 300 revolutions per minute, the number of teeth of a saw-toothed wheel (23) is 3, the caliber of a flat panel loudspeaker (3) is 120mm, the rated power is 1W, the impedance is 16 omega, and the corrugated edge (7) is a rubber edge.

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