CN107871408B

CN107871408B - A intelligent device for english teaching

Info

Publication number: CN107871408B
Application number: CN201711390491.5A
Authority: CN
Inventors: 冯雯雯
Original assignee: Individual
Current assignee: Individual
Priority date: 2017-12-21
Filing date: 2017-12-21
Publication date: 2020-11-20
Anticipated expiration: 2037-12-21
Also published as: CN107871408A

Abstract

The invention discloses an intelligent device for English teaching, which comprises a sound collector and an analysis module, wherein the sound collector comprises a shell, a back plate and a vibrating diaphragm are arranged in the shell, the edge of the vibrating diaphragm is connected with the shell, the inner wall of the shell is provided with a plurality of first grooves, a first worm is arranged in each first groove, the first worm is connected to a first motor through a first worm gear, the top end of the first worm is connected with a clamping block in a shaft mode, and the clamping block clamps and fixes the vibrating diaphragm; the top of vibrating diaphragm is provided with the roof, and the roof is fixed in the shell, and roof and vibrating diaphragm interval set up, are provided with a plurality of through-hole on the roof, and it has the second worm to peg graft in the through-hole, and the second worm is connected to the second motor through the second worm wheel, and the bottom coupling of second worm has first metal shrapnel, and first metal shrapnel surface is provided with flexible buffer layer. The invention can improve the defects of the prior art, improve the accuracy of the collector for collecting the pronunciation and improve the judgment accuracy of the analysis module.

Description

A intelligent device for english teaching

Technical Field

The invention relates to an English teaching device, in particular to an intelligent device for English teaching.

Background

In the English teaching process, the oral English teaching of students is a very important project. Traditional oral english teaching is usually read aloud through the student, and the mr is on-the-spot to evaluate and correct. Although the teaching mode has good effect, the teaching efficiency is low because the teaching mode is one-to-one teaching mode. The Chinese patent application CN106940939A discloses an auxiliary device for oral English teaching, which collects the reading audio of students through a collector, and evaluates and guides the oral pronunciation of the students through an analysis module. However, because the existing microphone for the collector has a limited sound receiving effect, the analysis module is affected by interference signals in the analysis process, and the analysis accuracy is not high.

Disclosure of Invention

The invention aims to provide an intelligent device for English teaching, which can overcome the defects of the prior art, improve the accuracy of a collector for pronunciation acquisition and improve the judgment accuracy of an analysis module.

In order to solve the technical problems, the technical scheme adopted by the invention is as follows.

An intelligent device for English teaching comprises a sound collector and an analysis module, wherein the sound collector comprises a shell, a back plate and a vibrating diaphragm are arranged in the shell, the back plate and the vibrating diaphragm are arranged at intervals to form a capacitor and used for converting sound wave signals into electric signals, the analysis module comprises a CPU chip and used for analyzing the electric signals and judging English sounds collected by the sound collector, the edge of the vibrating diaphragm is connected with the shell, a plurality of first grooves are formed in the inner wall of the shell, first worms are mounted in the first grooves and connected to a first motor through first worm gears, clamping blocks are axially connected to the top ends of the first worms, sliding grooves are formed in the first grooves, the clamping blocks are arranged in the sliding grooves in a sliding mode, and the clamping blocks clamp and fix the vibrating diaphragm; the top of vibrating diaphragm is provided with the roof, and the roof is fixed in the shell, and roof and vibrating diaphragm interval set up, are provided with a plurality of through-hole on the roof, and it has the second worm to peg graft in the through-hole, and the second worm is connected to the second motor through the second worm wheel, and the bottom coupling of second worm has first metal shrapnel, and first metal shrapnel surface is provided with flexible buffer layer.

Preferably, a second groove is formed between the adjacent first grooves, a rubber buckle is fixed in the second groove, and a second metal elastic sheet is arranged in the rubber buckle.

Preferably, the surface of the clamping block, which is in contact with the diaphragm, is provided with a hard clamping strip, and one side of the hard clamping strip, which is close to the edge of the diaphragm, is provided with an air bag.

Preferably, a partition plate is arranged in a gap between the through hole and the second worm, one end of the partition plate is fixed on the inner side of the through hole, a third groove is arranged at the other end of the partition plate, and the axis of the third groove is parallel to the thread on the surface of the second worm.

Preferably, a filtering module is arranged between the pronunciation collector and the analysis module, an input end of the filtering module is connected to a positive input end of the first operational amplifier through a first inductor, a first resistor, a second inductor, a first capacitor and a second capacitor which are connected in series, an input end of the filtering module is grounded through a third capacitor, the first resistor and the second inductor are grounded through a fourth capacitor and a fifth capacitor which are connected in series, a base electrode of the first triode is connected between the fourth capacitor and the fifth capacitor through a second resistor, a collector electrode of the first triode is connected between the second inductor and the first capacitor, an emitter electrode of the first triode is grounded through a sixth capacitor, a positive input end of the first operational amplifier is connected between the second inductor and the first capacitor through the third resistor and the fourth resistor which are connected in series, a ground connection is made between the third resistor and the fourth resistor through a seventh capacitor, and a first capacitor and the second capacitor are connected to an output end of the first operational amplifier through the fifth resistor, the output end of the first operational amplifier is connected to the inverting input end of the first operational amplifier through a sixth resistor, the inverting input end of the first operational amplifier is grounded through a seventh resistor, the output end of the first operational amplifier is connected to the positive input end of the second operational amplifier through an eighth resistor, the inverting input end of the second operational amplifier is grounded through a ninth resistor, the inverting input end of the second operational amplifier is connected to the output end of the second operational amplifier through a tenth resistor, the third resistor and the seventh capacitor are connected to the inverting input end of the third operational amplifier through an eighth capacitor, the inverting input end of the third operational amplifier is connected to the output end of the third operational amplifier through an eleventh resistor, the positive input end of the third operational amplifier is grounded through a twelfth resistor, the output end of the third operational amplifier is connected to the base electrode of the second triode through a thirteenth resistor, the collector electrode of the second triode is connected to the output end of the second operational amplifier, and the emitter electrode of the second triode is connected to the inverting input end of the second operational amplifier through, the output end of the second operational amplifier is connected to the output end of the filtering module through a fifteenth resistor.

Adopt the beneficial effect that above-mentioned technical scheme brought to lie in: according to the invention, through improving the fixing structure of the vibrating diaphragm in the pronunciation collector, the transverse and longitudinal tension of the vibrating diaphragm can be flexibly adjusted by using the two worms, so that the vibrating diaphragm can be always kept in the optimal tension state. The edge of vibrating diaphragm is fixed through first recess and second recess, can effectively improve the tensile state of vibrating diaphragm, sets up the baffle in the through-hole, can reduce the interference that the unordered flow of vibrating diaphragm external air caused the vibrating diaphragm, and the third recess can improve the flow direction uniformity of air current in the through-hole. In addition, through setting up the filtering module, utilize the band elimination filter that first operational amplifier constitutes, filter the interfering signal in the audio signal. In the pre-filter circuit in front of the first operational amplifier, the first triode is used for controlling the parameter of the second-stage pi-type filter, so that clutter signals can be effectively filtered, and meanwhile, the signal loss of the pre-filter circuit is reduced. The amplification factor of an amplification circuit formed by the second operational amplifier can be changed under the control of the second triode, so that the functions of increasing the amplification factor when the effective signal intensity is low and reducing the method factor when the effective signal intensity is high are realized.

Drawings

FIG. 1 is a schematic diagram of one embodiment of the present invention.

Fig. 2 is a structural diagram of a pronunciation collector in an embodiment of the present invention.

Fig. 3 is a structural view of a first groove in an embodiment of the present invention.

Fig. 4 is a structural view of a second groove in an embodiment of the present invention.

Fig. 5 is a structural view of a through hole in an embodiment of the present invention.

Fig. 6 is a structural diagram of a first metal dome according to an embodiment of the invention.

Fig. 7 is a circuit diagram of a filtering module in an embodiment of the invention.

In the figure: 1. a pronunciation collector; 2. an analysis module; 3. a housing; 4. a back plate; 5. vibrating diaphragm; 6. a first groove; 7. a first worm; 8. a first worm gear; 9. a first motor; 10. a clamping block; 11. a chute; 12. a top plate; 13. a through hole; 14. a second worm; 15. a second worm gear; 16. a second motor; 17. a first metal spring sheet; 18. a flexible buffer layer; 19. a second groove; 20. a rubber buckle; 21. a second metal dome; 22. a hard clamping strip; 23. an air bag; 24. a partition plate; 25. a third groove; 26. a filtering module; 27. a fourth groove; 28. a fifth groove; 29. a hard pad; IN, input end; OUT, an output terminal; r1, a first resistor; r2, a second resistor; r3, third resistor; r4, fourth resistor; r5, fifth resistor; r6, sixth resistor; r7, seventh resistor; r8, eighth resistor; r9, ninth resistor; r10, tenth resistor; r11, eleventh resistor; r12, twelfth resistor; r13, thirteenth resistor; r14, fourteenth resistance; r15, fifteenth resistor; c1, a first capacitance; c2, a second capacitor; c3, a third capacitance; c4, a fourth capacitance; c5, a fifth capacitance; c6, a sixth capacitor; c7, a seventh capacitance; c8, an eighth capacitor; l1, a first inductor; an L2 second inductor; a1, a first operational amplifier; a2, a second operational amplifier; a3, a third operational amplifier; q1, the first triode; q2, second triode.

Detailed Description

The standard parts used in the invention can be purchased from the market, the special-shaped parts can be customized according to the description and the description of the attached drawings, and the specific connection mode of each part adopts the conventional means of mature bolts, rivets, welding, sticking and the like in the prior art, and the detailed description is not repeated.

Referring to fig. 1-7, a specific embodiment of the present invention includes a pronunciation collector 1 and an analysis module 2, the pronunciation collector 1 includes a housing 3, a back plate 4 and a diaphragm 5 are disposed in the housing 3, the back plate 4 and the diaphragm 5 are spaced to form a capacitor, for converting the acoustic signal into an electrical signal, the analysis module 2 comprises a CPU chip for analyzing the electrical signal, the method comprises the steps of judging English pronunciation collected by a pronunciation collector 1, wherein the edge of a vibrating diaphragm 5 is connected with a shell 3, the inner wall of the shell 3 is provided with a plurality of first grooves 6, first worms 7 are mounted in the first grooves 6, the first worms 7 are connected to a first motor 9 through first worm gears 8, the top ends of the first worms 7 are connected with clamping blocks 10 in a shaft mode, sliding grooves 11 are formed in the first grooves 6, the clamping blocks 10 are arranged in the sliding grooves 11 in a sliding mode, and the vibrating diaphragm 5 is clamped and fixed by the clamping blocks 10; the top of vibrating diaphragm 5 is provided with roof 12, and roof 12 is fixed in shell 3, and roof 12 and vibrating diaphragm 5 interval set up, are provided with a plurality of through-hole 13 on the roof 12, and it has second worm 14 to peg graft in the through-hole 13, and second worm 14 is connected to second motor 16 through second worm wheel 15, and the bottom coupling of second worm 14 has first metal shrapnel 17, and first metal shrapnel 17 surface is provided with flexible buffer layer 18. The basic structure, working process and connection mode of the pronunciation collector 1 and the analysis module 2 to the generation collector 1 are fully disclosed in the chinese patent application CN 106940939A.

A second groove 19 is formed between the adjacent first grooves 6, a rubber buckle 20 is fixed in the second groove 19, and a second metal elastic sheet 21 is arranged in the rubber buckle 20. The surface of the clamping block 11 contacting the diaphragm 5 is provided with a hard clamping strip 22, and one side of the hard clamping strip 22 close to the edge of the diaphragm 5 is provided with an air bag 23. A partition plate 24 is arranged in a gap between the through hole 13 and the second worm 14, one end of the partition plate 24 is fixed at the inner side of the through hole 13, the other end of the partition plate 24 is provided with a third groove 25, and the axis of the third groove 25 is parallel to the thread on the surface of the second worm 14. A filter module 26 is arranged between the pronunciation collector 1 and the analysis module 2, an input terminal IN of the filter module 26 is connected to a positive input terminal of the first operational amplifier a1 through a first inductor L1, a first resistor R1, a second inductor L2, a first capacitor C1 and a second capacitor C2 which are connected IN series, the input terminal IN is grounded through a third capacitor C3, the first resistor R1 and the second inductor L2 are grounded through a fourth capacitor C4 and a fifth capacitor C5 which are connected IN series, a gap between the fourth capacitor C4 and the fifth capacitor C5 is connected to a base of the first triode Q1 through a second resistor R2, a collector of the first triode Q1 is connected between the second inductor L1 and the first capacitor C1, an emitter of the first triode Q1 is grounded through a sixth capacitor C1, a gap between the second inductor L1 and the first capacitor C1 is connected to a positive input terminal of the first operational amplifier a1 through a third resistor R1 and a fourth resistor R1 which are connected IN series, the output end of the first operational amplifier a1 is connected between the first capacitor C1 and the second capacitor C2 through a fifth resistor R5, the output end of the first operational amplifier a1 is connected to the inverting input end of the first operational amplifier a1 through a sixth resistor R6, the inverting input end of the first operational amplifier a1 is grounded through a seventh resistor R7, the output end of the first operational amplifier a1 is connected to the non-inverting input end of the second operational amplifier a2 through an eighth resistor R8, the inverting input end of the second operational amplifier a2 is grounded through a ninth resistor R9, the inverting input end of the second operational amplifier a2 is connected to the output end of the second operational amplifier a2 through a tenth resistor R10, the inverting input end of the third operational amplifier A3 is connected between the third resistor R3 and the seventh capacitor C7 through an eighth capacitor C8, the inverting input end of the third operational amplifier A3 is connected to the output end of the third operational amplifier A3 through an eleventh resistor R3, the twelfth operational amplifier A3 is grounded through a twelfth resistor R3, an output end of the third operational amplifier A3 is connected to a base of the second triode Q2 through a thirteenth resistor R13, a collector of the second triode Q2 is connected to an output end of the second operational amplifier a2, an emitter of the second triode Q2 is connected to an inverting input end of the second operational amplifier a2 through a fourteenth resistor R14, and an output end of the second operational amplifier a2 is connected to an output end OUT of the filtering module 26 through a fifteenth resistor R15.

In addition, a plurality of fourth grooves 27 are formed in the bottom surface of the first metal elastic sheet 17, a plurality of fifth grooves 28 are formed in the bottom surface of the flexible buffer layer 18, the fourth grooves 27 and the fifth grooves 28 are arranged in a staggered mode, the fifth grooves 28 are truncated cone-shaped, the diameter ratio of the top surfaces to the bottom surfaces of the fifth grooves 28 is 1:2, and hard gaskets 29 are arranged on the tops of the fifth grooves 28. The fourth grooves 27 and the fifth grooves 28 which are arranged in a staggered manner can improve the deformation uniformity of the first metal elastic sheet 17 and the flexible buffer layer 18 when the first metal elastic sheet 17 is in compression joint with the diaphragm 5. The fifth groove 28 is designed to be truncated cone-shaped, and the hard gasket 29 is additionally arranged, so that the stress uniformity of the part of the diaphragm 5, which is in contact with the edge of the fifth groove 28, can be improved when the flexible buffer layer 18 is in contact with the diaphragm 5.

If the collected voice core frequency is increased, the clamping block 10 is moved outwards; if the core frequency of the acquired voice is decreased, the holding block 10 is moved inward. When the position of the clamping block 10 is changed, the position of the first metal spring piece 17 is synchronously adjusted, and the sensitivity of the vibrating diaphragm 5 is kept unchanged. When the background noise ratio of the audio signal processed by the filtering module 26 is too high, the sensitivity of the diaphragm 5 is changed by adjusting the position of the first metal elastic sheet 17, so as to reduce the background noise.

In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, are merely for convenience of description of the present invention, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.

The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides an intelligent device for english teaching, including pronunciation collector (1) and analysis module (2), pronunciation collector (1) includes shell (3), be provided with backplate (4) and vibrating diaphragm (5) in shell (3), backplate (4) and vibrating diaphragm (5) interval set up in order to form electric capacity for turn into the signal of telecommunication with sound wave signal, analysis module (2) include the CPU chip, be used for carrying out the analysis to the signal of telecommunication, distinguish its characterized in that to the english pronunciation that pronunciation collector (1) was gathered: the edge of the vibrating diaphragm (5) is connected with the shell (3), a plurality of first grooves (6) are formed in the inner wall of the shell (3), first worms (7) are mounted in the first grooves (6), the first worms (7) are connected to a first motor (9) through first worm wheels (8), clamping blocks (10) are connected to the top ends of the first worms (7) in a shaft mode, sliding grooves (11) are formed in the first grooves (6), the clamping blocks (10) are arranged in the sliding grooves (11) in a sliding mode, and the vibrating diaphragm (5) is clamped and fixed by the clamping blocks (10); the top of the vibrating diaphragm (5) is provided with a top plate (12), the top plate (12) is fixed in the shell (3), the top plate (12) and the vibrating diaphragm (5) are arranged at intervals, a plurality of through holes (13) are formed in the top plate (12), a second worm (14) is inserted in the through holes (13), the second worm (14) is connected to a second motor (16) through a second worm wheel (15), the bottom of the second worm (14) is connected with a first metal elastic sheet (17) in a shaft mode, the surface of the first metal elastic sheet (17) is provided with a flexible buffer layer (18), a second groove (19) is formed between adjacent first grooves (6), a rubber buckle (20) is fixed in the second groove (19), and a second metal elastic sheet (21) is arranged in the rubber buckle (20);

a filter module (26) is arranged between the pronunciation collector (1) and the analysis module (2), an input end (IN) of the filter module (26) is connected to a positive input end of a first operational amplifier (A1) through a first inductor (L1), a first resistor (R1), a second inductor (L2), a first capacitor (C1) and a second capacitor (C2) which are connected IN series, the input end (IN) is grounded through a third capacitor (C3), the first resistor (R1) and the second inductor (L2) are grounded through a fourth capacitor (C4) and a fifth capacitor (C5) which are connected IN series, a collector electrode of the first triode (Q6) is connected between the fourth capacitor (C4) and the fifth capacitor (C5) through a second resistor (R2) to a base electrode of the first triode (Q8), a collector electrode of the first triode (Q2) is connected to an emitter electrode of the first capacitor (C1), and an emitter electrode of the first triode (Q29) is grounded through a sixth capacitor (C6), the output end of the first operational amplifier (a 1) is connected to the inverting input end of the first operational amplifier (a 1) through a sixth resistor (R6), the inverting input end of the first operational amplifier (a 1) is connected to the ground through a seventh resistor (R5), the output end of the first operational amplifier (a 1) is connected to the inverting input end of the second operational amplifier (a 2) through an eighth resistor (R8), the output end of the second operational amplifier (a 1) is connected to the inverting input end of the second operational amplifier (a 2) through a ninth resistor (R10), the positive-phase input end of the second operational amplifier (a 3642) is connected to the positive-phase input end of the first operational amplifier (a 1) through a third resistor (R3) and a fourth resistor (R4) which are connected in series, the third resistor (R3) and the fourth resistor (R4) are connected to the ground through a seventh capacitor (C7), the first capacitor (C1) and the second capacitor (C2) are connected to the output end of the first operational amplifier (a 1) through a fifth resistor (R5732), the inverting input end of the first operational amplifier (a 5928) is connected to the inverting input end of the second operational amplifier (a nineteenth resistor (R386) through a resistor (R59, the third resistor (R3) and the seventh capacitor (C7) are connected to an inverting input terminal of the third operational amplifier (A3) through an eighth capacitor (C8), the inverting input terminal of the third operational amplifier (A3) is connected to an output terminal of the third operational amplifier (A3) through an eleventh resistor (R11), a non-inverting input terminal of the third operational amplifier (A3) is grounded through a twelfth resistor (R12), an output terminal of the third operational amplifier (A3) is connected to a base of the second triode (Q2) through a thirteenth resistor (R13), a collector of the second triode (Q2) is connected to an output terminal of the second operational amplifier (a 2), an emitter of the second triode (Q2) is connected to an inverting input terminal of the second operational amplifier (a 2) through a fourteenth resistor (R14), and an output terminal of the second operational amplifier (a 2) is connected to an output terminal (OUT) of the filter module (26) through a fifteenth resistor (R15).

2. The intelligent device for english teaching of claim 1, characterized in that: the surface of the clamping block (11) contacted with the vibrating diaphragm (5) is provided with a hard clamping strip (22), and one side of the hard clamping strip (22) close to the edge of the vibrating diaphragm (5) is provided with an air bag (23).

3. The intelligent device for english teaching of claim 1, characterized in that: a partition plate (24) is arranged in a gap between the through hole (13) and the second worm (14), one end of the partition plate (24) is fixed on the inner side of the through hole (13), a third groove (25) is arranged at the other end of the partition plate (24), and the axis of the third groove (25) is parallel to the thread on the surface of the second worm (14).