Interactive foreign language speech training auxiliary system for hearing-impaired children

Abstract

The invention provides an interactive foreign language speech training auxiliary system for hearing-impaired children, and belongs to the field of speech training learning. A multi-core plastic optical fiber is embedded into a neck sleeve to be tightly attached to the throat, a multi-path Michelson interference structure is formed by an optical filter to accurately sense the vibration spectrum of the throat, parameters such as the frequency, the intensity and the duration of voice are converted into visual optical signals to be conveniently displayed in the plastic optical fiber, and through the wavelength coding technology, the visual optical signals can be displayed in the neck sleeve. The method comprises the following steps: mapping a voice base frequency band into a visible spectrum, enabling voice of different base frequency bands to correspond to visible light of different colors respectively, representing voice intensity through light intensity gradient, forming touch-vision dual-channel reinforcement learning, providing real-time physiological feedback by touch, constructing an abstract voice model by a photoelectric signal, and improving the voice feature identification degree through the synergistic effect of the two. The foreign language pronunciation process is converted into a gamification scene, the training interest of children is stimulated through color changes, and the problems that a traditional method is low in participation degree and boring in training are solved.

Description

Technical Field

[0001] The present application relates to the technical field of speech training and learning, and in particular to an interactive foreign language speech training auxiliary system for hearing-impaired children. Background Art

[0002] Hearing-impaired children face innate challenges in their language development. The damage to their auditory pathways has made speech perception and pronunciation training a core problem in the field of special education. With the acceleration of globalization, foreign language proficiency has become one of the basic qualities of citizens in modern society. Foreign language speech training for hearing-impaired children is not only related to the acquisition of language skills, but also an important foundation for their integration into a multicultural society and access to international education resources. Studies have shown that in the process of foreign language acquisition, the communication barriers caused by insufficient speech clarity make the foreign language learning effect of hearing-impaired children far lower than that of normal-hearing children, which seriously restricts their educational equity and future development space. In this context, exploring speech training methods that meet the perceptual characteristics of hearing-impaired children has important social significance and educational value.

[0003] Traditional speech training mainly relies on visual imitation and tactile vibration perception, but there are significant limitations. Visual lip reading is difficult to capture implicit pronunciation features such as vocal cord vibration and airflow intensity. The larynx is the core vibration source of human voice, and its vibration pattern directly reflects the movement state of the vocal cords. Obtaining laryngeal vibration information through the tactile channel can enable hearing-impaired children to bypass the damaged auditory system and directly establish a neural circuit of "pronunciation action-tactile feedback". However, conventional tactile devices are difficult to fit tightly with the throat for a long time and cannot accurately map the spectral characteristics of speech. For example, the difference in vocal cord vibration between the unvoiced consonant / p / and the voiced consonant / b / in English is only 30-50Hz, but existing tactile sensors generally have a frequency recognition error of ±15Hz, resulting in the convergence of tactile feedback of similar phonemes (such as / i / and / e / ), making it difficult for children to establish accurate speech-tactile mapping. At the same time, the instantaneous and invisible nature of tactile signals prevents children from forming a continuous spatial speech representation, affecting the long-term memory effect. Summary of the invention

[0004] In order to overcome the shortcomings of the traditional throat-touching sound vibration perception training method, the present application proposes an interactive foreign language speech training auxiliary system for hearing-impaired children.

[0005] The technical solution adopted in the present application is: an interactive foreign language speech training auxiliary system for hearing-impaired children, comprising a neck sleeve and a demodulator, wherein the neck sleeve has a built-in sensing module and an optical fiber interface is provided on the neck sleeve, and the neck sleeve is connected to the demodulator via an optical fiber; The demodulator is built with a SLED ultra-wideband light source, an LED light source, a first optical fiber coupler, a first optical filter, a second optical filter, a variable optical attenuator, a microprocessor, a rotating glass color disk and a plurality of optical fiber interfaces, wherein the SLED ultra-wideband light source and the LED light source are respectively connected to the input end a and the input end b of the first optical fiber coupler, the output end c of the first optical fiber coupler is connected to the input end e of the first optical filter, the output end d of the first optical fiber coupler is connected to the input end a of the second optical filter, the output end b of the second optical filter is connected to the input end a of the variable optical attenuator, the control end b of the variable optical attenuator is connected to the output end e of the microprocessor, the output end c of the variable optical attenuator is connected to the input end a of the rotating glass color disk, the control end b of the rotating glass color disk is connected to the output end f of the microprocessor, the output end c of the rotating glass color disk is connected to the fifth optical fiber interface, and the fifth optical fiber interface is used to connect to the total optical fiber interface on the neck cover; The detection light of the multi-channel output port of the first optical filter is constructed into a Michelson interference optical path, each Michelson interference optical path is connected to the input port of the microprocessor through a photoelectric detector and a data acquisition card, and each Michelson interference optical path is also connected to an optical fiber interface, and the Michelson interference optical path is connected to a sensing module in the neck cover through the optical fiber interface. The sensing module detects the vibration signal and reflects it back to the Michelson interference optical path. After passing through the photoelectric detector and the data acquisition card, the microprocessor converts the corresponding vibration intensity information into gain control of the variable optical attenuator, and converts the corresponding vibration frequency information into color block control of the rotating glass color disk.

[0006] Furthermore, the sensing module includes multiple sensor optical fibers, and each of the sensor optical fibers is connected to a Faraday rotator.

[0007] Furthermore, a display module is also provided on the neckband, and the display module is used to present different vibration information as different brightness and colors.

[0008] Furthermore, the first optical filter includes four output ports a, b, c, and d, and the detection light output from the four output ports is constructed as a four-way Michelson interference optical path, and the perception module is provided with four sensing optical fibers and four Faraday rotators corresponding to the four-way Michelson interference optical path, and the neck collar is provided with a sixth optical fiber interface and a seventh optical fiber interface.

[0009] Furthermore, the first Michelson interference optical path includes a second optical fiber coupler, a first photoelectric detector, a first data acquisition card, and a first optical fiber interface. The output end a of the first optical filter is connected to the port b of the second optical fiber coupler to allow the light source to pass in one direction; the port a of the second optical fiber coupler is connected to the input end a of the first photoelectric detector; the output end b of the first photoelectric detector is connected to the input end a of the first data acquisition card to collect data on the signal; the output end b of the first data acquisition card is connected to the input end c of the microprocessor to perform data analysis and processing; the port c of the second optical fiber coupler is connected to the first optical fiber interface, and the first optical fiber interface is connected to the input end a of the seventh optical fiber interface; the port d of the second optical fiber coupler is connected to the input end a of the first optical switch, and the output end c of the first optical switch is connected to the input end a of the first reference optical fiber; the output end b of the first reference optical fiber is connected to the first Faraday rotator.

[0010] Furthermore, the second Michelson interference optical path includes a third optical fiber coupler, a second photoelectric sensor, a second data acquisition card, and a second optical fiber interface. The output end b of the first optical filter is connected to the port a of the third optical fiber coupler to allow the light source to pass in one direction; the port b of the third optical fiber coupler is connected to the input end a of the second photoelectric detector; the output end b of the second photoelectric detector is connected to the input end a of the second data acquisition card to collect data on the signal; the output end b of the second data acquisition card is connected to the input end a of the microprocessor to perform data analysis and processing; the port d of the third optical fiber coupler is connected to the second optical fiber interface, and the second optical fiber interface is connected to the input end b of the seventh optical fiber interface; and the port c of the third optical fiber coupler is connected to the input end b of the first optical switch.

[0011] Furthermore, the third Michelson interference optical path includes a fourth optical fiber coupler, a third photodetector, a third data acquisition card, and a third optical fiber interface. The output end c of the first optical filter is connected to the port b of the fourth optical fiber coupler to allow the light source to pass in one direction; the port a of the fourth optical fiber coupler is connected to the input end a of the third photodetector; the output end b of the third photodetector is connected to the input end a of the third data acquisition card to collect data on the signal; the output end b of the third data acquisition card is connected to the input end d of the microprocessor to perform data analysis and processing; the port c of the fourth optical fiber coupler is connected to the third optical fiber interface, and the third optical fiber interface is connected to the input end c of the seventh optical fiber interface; the port d of the fourth optical fiber coupler is connected to the input end a of the second optical switch; the output end c of the second optical switch is connected to the input end a of the second reference optical fiber; and the output end b of the second reference optical fiber is connected to the second Faraday rotator.

[0012] Furthermore, the fourth Michelson interference optical path includes a fifth optical fiber coupler, a fourth photodetector, a fourth data acquisition card, and a fourth optical fiber interface. The output end d of the first optical filter is connected to the port a of the fifth optical fiber coupler to allow the light source to pass in one direction; the port b of the fifth optical fiber coupler is connected to the input end a of the fourth photodetector; the output end b of the fourth photodetector is connected to the input end a of the fourth data acquisition card to collect data on the signal; the output end b of the fourth data acquisition card is connected to the input end b of the microprocessor to perform data analysis and processing; the port d of the fifth optical fiber coupler is connected to the fourth optical fiber interface; the fourth optical fiber interface is connected to the input end d of the seventh optical fiber interface; and the port c of the fifth optical fiber coupler is connected to the input end b of the second optical switch.

[0013] Further, the input end a of the seventh optical fiber interface is connected to the output end e of the seventh optical fiber interface, and the output end e of the seventh optical fiber interface is connected to the third Faraday rotator via the sensing optical fiber a in the sensing module; the input end b of the seventh optical fiber interface is connected to the output end f of the seventh optical fiber interface; the output end f of the seventh optical fiber interface is connected to the fourth Faraday rotator via the sensing optical fiber b in the sensing module; the input end c of the seventh optical fiber interface is connected to the output end g of the seventh optical fiber interface; the output end g of the seventh optical fiber interface is connected to the fifth Faraday rotator via the sensing optical fiber c in the sensing module; the input end d of the seventh optical fiber interface is connected to the output end h of the seventh optical fiber interface; the output end h of the seventh optical fiber interface is connected to the sixth Faraday rotator via the sensing optical fiber d in the sensing module; the fifth optical fiber interface is connected to the input end a of the sixth optical fiber interface; and the output end b of the sixth optical fiber interface is connected to the optical fiber in the display module.

[0014] Furthermore, a first Velcro and a second Velcro are respectively provided at both ends of the neck cover, and the first Velcro is pasted onto the second Velcro when in use.

[0015] The beneficial effects of this application compared to the prior art are: (1) In order to overcome the shortcomings of the traditional throat-touching sound vibration perception training method, a multi-core plastic optical fiber is embedded in the neck collar to achieve a close fit with the throat, and an optical filter is used to form a multi-path Michelson interference structure to accurately perceive the throat vibration spectrum; (2) The frequency, intensity, duration and other parameters of speech are converted into visual optical signals for easy display in plastic optical fibers. Through wavelength coding technology, the fundamental frequency band of speech is mapped to the visible spectrum, so that speech in different fundamental frequency bands corresponds to visible light of different colors, and the intensity of speech is represented by the light intensity gradient. (3) This multimodal feedback mechanism can form a "tactile-visual" dual-channel reinforcement learning. The touch provides real-time physiological feedback, and the photoelectric signal constructs an abstract speech model. The synergy of the two can improve the recognition of speech features. (4) The interactive auxiliary system can transform the pronunciation process into a gamification scenario, stimulate children's interest in training through dynamic feedback such as color changes and color brightness, and solve the problem of low participation and boring training in traditional methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present application is further described below with reference to the accompanying drawings: Figure 1 A schematic diagram of the optical path structure of a demodulator in an interactive foreign language speech training auxiliary system for hearing-impaired children provided in an embodiment of the present application; Figure 2 A diagram showing the layout of a neck collar in an interactive foreign language speech training auxiliary system for hearing-impaired children provided in an embodiment of the present application; In the figure: 1 is a SLED broadband light source, 2 is an LED light source, 3 is a first fiber coupler, 4 is a first optical filter, 5 is a second fiber coupler, 6 is a first photodetector, 7 is a first data acquisition card, 8 is a first fiber interface, 9 is a third fiber coupler, 10 is a second photoelectric sensor, 11 is a second data acquisition card, 12 is a second fiber interface, 13 is a first optical switch, 14 is a first reference fiber, 15 is a first Faraday rotator, 16 is a fourth fiber coupler, 17 is a third photodetector, 18 is a third data acquisition card, 19 is a third fiber interface, 20 is a fifth fiber coupler, 21 is The fourth photodetector, 22 is the fourth data acquisition card, 23 is the fourth optical fiber interface, 24 is the second optical switch, 25 is the second reference optical fiber, 26 is the second Faraday rotator, 27 is the second optical filter, 28 is the variable optical attenuator, 29 is the microprocessor, 30 is the rotating glass color disk, 31 is the fifth optical fiber interface, 32 is the sixth optical fiber interface, 33 is the display module, 34 is the seventh optical fiber interface, 35 is the third Faraday rotator, 36 is the fourth Faraday rotator, 37 is the fifth Faraday rotator, 38 is the sixth Faraday rotator, 39 is the sensing module, 40 is the first Velcro, and 41 is the second Velcro. DETAILED DESCRIPTION

[0017] like Figure 1 and 2As shown, the present application provides an interactive foreign language speech training auxiliary system for hearing-impaired children, including a neck sleeve with a multi-core plastic optical fiber embedded inside and a demodulator, and an optical fiber interface is left on the neck sleeve, and the neck sleeve and the demodulator are connected by optical fiber. The present application achieves a close fit with the throat by embedding the multi-core plastic optical fiber into the neck sleeve, and the demodulator uses an optical filter to form a multi-path Michelson interference structure to accurately sense the throat vibration spectrum, and converts the frequency, intensity, duration and other parameters of the speech into a visual optical signal for easy display in the plastic optical fiber. Through wavelength coding technology, the speech baseband is mapped to a visible spectrum, so that the speech of different basebands corresponds to visible light of different colors, and the intensity of the speech is characterized by the light intensity gradient, thereby constructing a multi-dimensional "light-sound" mapping model of light wavelength-light intensity. This multimodal feedback mechanism can form a "tactile-visual" dual-channel reinforcement learning: touch provides real-time physiological feedback, and the photoelectric signal constructs an abstract speech model. The synergistic effect of the two can improve the recognition of speech features.

[0018] like Figure 1 As shown, the demodulator proposed in the present application includes an SLED ultra-wideband light source 1, an LED light source 2, a first fiber coupler 3, a first optical filter 4, a second fiber coupler 5, a first photodetector 6, a first data acquisition card 7, a first fiber interface 8, a third fiber coupler 9, a second photoelectric sensor 10, a second data acquisition card 11, a second fiber interface 12, a first optical switch 13, a first reference fiber 14, a first Faraday rotator 15, a fourth fiber coupler 16, a third photodetector 17, a third data acquisition card 18, a third fiber interface 19, a fifth fiber coupler 20, a fourth photodetector 21, a fourth data acquisition card 19, a fifth fiber optic interface 22, a fifth fiber optic coupler 23, a fifth photodetector 24, a fifth data acquisition card 11, a fifth fiber optic interface 25, a fifth fiber optic coupler 26, a fifth photodetector 27, a fifth data acquisition card 12, a fifth fiber optic interface 28, a fifth fiber optic coupler 29, a fifth photodetector 30, a fifth data acquisition card 13, a fifth fiber optic interface 31, a fifth fiber optic coupler 32, a fifth photodetector 33, a fifth data acquisition card 13, a fifth fiber optic interface 34, a fifth fiber optic coupler 35, a fifth photodetector 36, a fifth data acquisition card 13, a fifth fiber optic interface 35, a fifth fiber optic coupler 37, a fifth photodetector 38, a fifth data acquisition card 14, a fifth fiber optic interface 36, a fifth fiber optic coupler 38, a fifth photodetector 39, a fifth data acquisition card 15, a fifth fiber optic interface 39, a fifth fiber optic coupler 31, a fifth photodetector 32, a fifth data acquisition card Collection card 22, fourth fiber optic interface 23, second optical switch 24, second reference fiber 25, second Faraday rotator 26, second optical filter 27, variable optical attenuator 28, microprocessor 29, rotating glass color wheel 30, fifth fiber optic interface 31, sixth fiber optic interface 32, display module 33, seventh fiber optic interface 34, sensing module 39, first Velcro 40, second Velcro 41; wherein, the sensing module 39 is composed of a third Faraday rotator 35, a fourth Faraday rotator 36, a fifth Faraday rotator 37, a sixth Faraday rotator 38 and sensing fiber a, sensing fiber b, sensing fiber c, and sensing fiber d.

[0019] The SLED broadband light source 1 outputs continuous light with a central wavelength of 1310nm and a spectral width of 100nm, and the LED light source 2 outputs continuous light of 380-750nm, which are respectively connected to the input end a and the input end b of the first optical fiber coupler 3 to achieve multi-wavefield laser output; the output end c of the first optical fiber coupler 3 is connected to the input end e of the first optical filter 4 to achieve 850nm bandpass filtering; in order to achieve the perception of full-area vibration signals, the detection light output by the four ports a, b, c, and d of the first optical filter 4 is constructed as a four-way Michelson interference optical path.

[0020] The first interference optical path is as follows: the output end a of the first optical filter 4 is connected to the port b of the second optical fiber coupler 5 to provide a light source for the interference structure; the port c of the second optical fiber coupler 5 is connected to the input end a of the seventh optical fiber interface 34 through the first optical fiber interface 8, the output end e of the seventh optical fiber interface 34 is connected to the sensing optical fiber a, the detection light containing vibration information is reflected by the third Faraday rotator 35 and then returned, and finally input to the second optical fiber coupler 5 through the port c; the port d of the second optical fiber coupler 5 outputs the detection light to the input end a of the first optical switch 13, the output end c of the first optical switch 13 is connected to the first reference optical fiber 14, and the detection light is transmitted to the reference optical fiber 14 through the third Faraday rotator 35. After being reflected by the first Faraday rotator 15, the light is inputted by the port d of the second optical fiber coupler 5. After the interference occurs at the second optical fiber coupler 5 between the light including the specific wavelength range through vibration sensing and the signal not including the specific wavelength, the light is connected to the input end a of the first photodetector 6 through the port a to observe and detect the interference fringes. The output end b of the first photodetector 6 is connected to the input end a of the first data acquisition card 7 to record and store the collected data. The output end b of the first data acquisition card 7 is connected to the input end c of the microprocessor 29. The microprocessor 29 outputs the corresponding instruction signal after analyzing and processing the stored data.

[0021] The second interference optical path is as follows: the output end b of the first optical filter 4 is connected to the port a of the third optical fiber coupler 9 to provide a light source; the port d of the third optical fiber coupler 9 is connected to the input end b of the seventh optical fiber interface 34 through the second optical fiber interface 12, the output end f of the seventh optical fiber interface 34 is connected to the sensing optical fiber b, the detection light containing vibration information is reflected by the fourth Faraday rotator 36 and then returned, and finally input to the third optical fiber coupler 9 through the port d; the port c of the third optical fiber coupler 9 outputs the detection light to the input end b of the first optical switch 13, the output end c of the first optical switch 13 is connected to the first reference optical fiber 14, and is input by the port c of the third optical fiber coupler 9 after being reflected by the first Faraday rotator 15, and the second interference optical path is as follows: After the vibration sensing light containing a specific wavelength range and a signal not containing a specific wavelength interfere at the third optical fiber coupler 9, the port b is connected to the input end a of the second photodetector 10 to observe and detect the interference fringes, and the output end b of the second photodetector 10 is connected to the input end a of the second data acquisition card 11 to record and store the collected data; the output end b of the second data acquisition card 11 is connected to the input end a of the microprocessor 29, and the microprocessor 29 outputs the corresponding command signal after analyzing and processing the stored data; the input end of the first optical switch 13 is respectively connected to the port d of the second optical fiber coupler 5 and the port c of the third optical fiber coupler 9, forming a round-robin inspection mechanism for two reflection loops.

[0022] The third interference optical path is as follows: the output end c of the first optical filter 4 is connected to the port b of the fourth optical fiber coupler 16 to provide a light source; the fourth optical fiber coupler 16 is connected to the c input end of the seventh optical fiber interface 34 through the third optical fiber interface 19, the output end g of the seventh optical fiber interface 34 is connected to the sensing optical fiber c, the detection light containing vibration information is reflected by the fifth Faraday rotator 37 and then returned, and finally input to the fourth optical fiber coupler 16 through the port c; the port d of the fourth optical fiber coupler 16 outputs the detection light to the input end a of the second optical switch 24, the output end c of the second optical switch 24 is connected to the second reference optical fiber 25, and the detection light is reflected by the second Faraday rotator 37 and then returned to the sensing optical fiber c. After being reflected by the optical rotator 26, the light is inputted by the port d of the fourth optical fiber coupler 16. After the light including the specific wavelength range through vibration sensing and the signal not including the specific wavelength interfere at the fourth optical fiber coupler 16, the light is connected to the input end a of the third photodetector 17 by the port a to observe and detect the interference fringes. The output end b of the third photodetector 17 is connected to the input end a of the third data acquisition card 18 to record and store the collected data. The output end b of the third data acquisition card 18 is connected to the input end d of the microprocessor 29. The microprocessor 29 analyzes and processes the stored data and outputs the corresponding instruction signal.

[0023] The fourth interference optical path is as follows: the output end d of the first optical filter 4 is connected to the port a of the fifth optical fiber coupler 20 to provide a light source; the port d of the fifth optical fiber coupler 20 is connected to the input end d of the seventh optical fiber interface 34 through the fourth optical fiber interface 23, the output end h of the seventh optical fiber interface 34 is connected to the sensing optical fiber d, the detection light containing vibration information is reflected by the sixth Faraday rotator 38 and then returned, and finally input to the fifth optical fiber coupler 20 through the port d; the port c of the fifth optical fiber coupler 20 outputs the detection light to the input end b of the second optical switch 24, the output end c of the second optical switch 24 is connected to the second reference optical fiber 25, and is input to the port c of the fifth optical fiber coupler 20 after being reflected by the second Faraday rotator 26. After the vibration-sensed light containing a specific wavelength range and a signal not containing a specific wavelength interfere at the fifth optical fiber coupler 20, port b is connected to the input end a of the fourth photodetector 21 to observe and detect interference fringes, and the output end b of the fourth photodetector 21 is connected to the input end a of the fourth data acquisition card 22 to record and store the collected data; the output end b of the fourth data acquisition card 22 is connected to the input end b of the microprocessor 29, and the microprocessor 29 analyzes and processes the stored data and outputs the corresponding command signal; the input end of the second optical switch 24 is respectively connected to the port d of the fourth optical fiber coupler 16 and the port c of the fifth optical fiber coupler 20, forming a round-robin inspection mechanism for two reflection loops.

[0024] The output end d of the first optical fiber coupler 3 is connected to the input end a of the second optical filter 27 to filter out light of other wavelengths in different ranges. After the continuous light passes through the 380nm high-pass filter and the 750nm low-pass filter, the output end b of the second optical filter 27 outputs visible light with a wavelength of 380-750nm; the output end e of the microprocessor 29 is connected to the control end b of the variable optical attenuator 28 to control the gain of the variable optical attenuator 28 according to the intensity information of the perceived vibration signal; the output end f of the microprocessor 29 is connected to the control end b of the rotating glass color disk 30 to control the color disk to rotate to the desired position according to the frequency information of the collected vibration signal. target color block; the output end b of the second optical filter 27 outputs visible light which passes through the input end a of the variable optical attenuator 28, adjusts the output light illumination, and then enters the input end a of the rotating glass color disk 30 through the output end c of the variable optical attenuator 28, and is filtered by different color blocks of the color disk, and outputs light of different colors at the output end c of the rotating glass color disk 30; the output end c of the rotating glass color disk 30 is connected to the fifth optical fiber interface 31; the fifth optical fiber interface 31 is connected to the input end a of the sixth optical fiber interface 32, and the output end b of the sixth optical fiber interface 32 is connected to the display module 33 to display light of different intensities and colors corresponding to different information.

[0025] Figure 2This is a layout diagram of a neck cover provided by an embodiment of the present application. A sixth optical fiber interface 32 and a seventh optical fiber interface 34 are provided at the bottom of the neck cover, and a display module 33 and a sensing module 39 are provided in the main part of the neck cover, wherein the sensing optical fiber a in the sensing module 39 is connected to the third Faraday rotator 35, the sensing optical fiber b is connected to the fourth Faraday rotator 36, the sensing optical fiber c is connected to the fifth Faraday rotator 37, and the sensing optical fiber d is connected to the sixth Faraday rotator 38, and a first Velcro 40 and a second Velcro 41 are installed at both ends. The first Velcro 40 and the second Velcro 41 are connected to fix the neck cover.

[0026] when Figure 2 After the sensing optical fibers a, b, c, and d shown detect the vibration signal, the signals are reflected back to the four-way Michelson interference structure through the third Faraday rotator 35, the fourth Faraday rotator 36, the fifth Faraday rotator 37, and the sixth Faraday rotator 38 respectively. After passing through the corresponding photoelectric detectors and data acquisition cards, the microprocessor 29 converts the corresponding vibration intensity information into gain control of the variable optical attenuator 28, and converts the corresponding vibration frequency information into color block control of the rotating glass color disk 30. Different vibration information presents different brightness and color in the optical fiber of the display module 33.

[0027] In this embodiment, the sensing optical fibers a, b, c, and d are all plastic optical fibers for sensing, and the optical fibers in the display module 33 are also plastic optical fibers for color display.

[0028] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. An interactive foreign language speech training auxiliary system for hearing-impaired children, characterized by: It comprises a neck sleeve and a demodulator, wherein the neck sleeve has a built-in sensing module (39) and an optical fiber interface is provided on the neck sleeve, and the neck sleeve is connected to the demodulator via the optical fiber; The demodulator is equipped with a SLED ultra-wideband light source (1), an LED light source (2), a first optical fiber coupler (3), a first optical filter (4), a second optical filter (27), a variable optical attenuator (28), a microprocessor (29), a rotating glass color disk (30), and a plurality of optical fiber interfaces. The SLED ultra-wideband light source (1) and the LED light source (2) are respectively connected to the input end a and the input end b of the first optical fiber coupler (3), the output end c of the first optical fiber coupler (3) is connected to the input end e of the first optical filter (4), and the output end d of the first optical fiber coupler (3) is connected to the input end e of the first optical filter (4). An input end a of the second optical filter (27) and an output end b of the second optical filter (27) are connected to an input end a of a variable optical attenuator (28); a control end b of the variable optical attenuator (28) is connected to an output end e of a microprocessor (29); an output end c of the variable optical attenuator (28) is connected to an input end a of a rotating glass color disk (30); a control end b of the rotating glass color disk (30) is connected to an output end f of the microprocessor (29); and an output end c of the rotating glass color disk (30) is connected to a fifth optical fiber interface (31); and the fifth optical fiber interface (31) is used to connect to a total optical fiber interface on the neck cover; The detection light of the multi-channel output port of the first optical filter (4) is constructed into a Michelson interference optical path. Each Michelson interference optical path is connected to an input port of a microprocessor (29) through a photoelectric detector and a data acquisition card. Each Michelson interference optical path is also connected to an optical fiber interface. The Michelson interference optical path is connected to a sensing module (39) in the neck cover through the optical fiber interface. The sensing module (39) detects a vibration signal and reflects it back to the Michelson interference optical path. After passing through the photoelectric detector and the data acquisition card, the microprocessor (29) converts the corresponding vibration intensity information into gain control of the variable optical attenuator (28), and converts the corresponding vibration frequency information into color block control of the rotating glass color disk (30).

2. The interactive foreign language speech training auxiliary system for hearing-impaired children according to claim 1, characterized in that: The sensing module (39) includes multiple sensor optical fibers, each of which is connected to a Faraday rotator.

3. The interactive foreign language speech training auxiliary system for hearing-impaired children according to claim 2, characterized in that: The neck cover is also provided with a display module (33), and the display module (33) is used to present different vibration information in different brightness and colors.

4. The interactive foreign language speech training auxiliary system for hearing-impaired children according to claim 1, characterized in that: The first optical filter (4) comprises four output ports, a, b, c and d, the detection light outputted from the four output ports is structured as a four-way Michelson interference optical path, and the sensing module (39) is provided with four sensing optical fibers and four Faraday rotators corresponding to the four-way Michelson interference optical path, and the neck collar is provided with a sixth optical fiber interface (32) and a seventh optical fiber interface (34).

5. The interactive foreign language speech training auxiliary system for hearing-impaired children according to claim 4, characterized in that: The first Michelson interference optical path comprises a second optical fiber coupler (5), a first photodetector (6), a first data acquisition card (7), and a first optical fiber interface (8); the output end a of the first optical filter (4) is connected to the port b of the second optical fiber coupler (5) so that the light source passes in one direction; the port a of the second optical fiber coupler (5) is connected to the input end a of the first photodetector (6); the output end b of the first photodetector (6) is connected to the input end a of the first data acquisition card (7) to collect data on the signal; the output end b of the first data acquisition card (7) is connected to the input end c of the microprocessor (29) to perform data analysis and processing; the port c of the second optical fiber coupler (5) is connected to the first optical fiber interface (8), and the first optical fiber interface (8) is connected to the input end a of the seventh optical fiber interface (34); the port d of the second optical fiber coupler (5) is connected to the input end a of the first optical switch (13), and the output end c of the first optical switch (13) is connected to the input end a of the first reference optical fiber (14); The output end b of the first reference optical fiber (14) is connected to the first Faraday rotator (15).

6. The interactive foreign language speech training auxiliary system for hearing-impaired children according to claim 5, characterized in that: The second Michelson interference optical path comprises a third optical fiber coupler (9), a second photoelectric sensor (10), a second data acquisition card (11), and a second optical fiber interface (12); the output end b of the first optical filter (4) is connected to the port a of the third optical fiber coupler (9) so that the light source passes in one direction; the port b of the third optical fiber coupler (9) is connected to the input end a of the second photoelectric detector (10); the output end b of the second photoelectric detector (10) is connected to the input end a of the second data acquisition card (11) to collect data on the signal; the output end b of the second data acquisition card (11) is connected to the input end a of the microprocessor (29) to perform data analysis and processing; the port d of the third optical fiber coupler (9) is connected to the second optical fiber interface (12), and the second optical fiber interface (12) is connected to the input end b of the seventh optical fiber interface (34); and the port c of the third optical fiber coupler (9) is connected to the input end b of the first optical switch (13).

7. The interactive foreign language speech training auxiliary system for hearing-impaired children according to claim 4, characterized in that: The third Michelson interference optical path comprises a fourth optical fiber coupler (16), a third photodetector (17), a third data acquisition card (18), and a third optical fiber interface (19); the output end c of the first optical filter (4) is connected to the port b of the fourth optical fiber coupler (16) so that the light source passes in one direction; the port a of the fourth optical fiber coupler (16) is connected to the input end a of the third photodetector (17); the output end b of the third photodetector (17) is connected to the input end a of the third data acquisition card (18) to collect data on the signal; the output end b of the third data acquisition card (18) is connected to the input end d of the microprocessor (29) to perform data analysis and processing; the port c of the fourth optical fiber coupler (16) is connected to the third optical fiber interface (19), and the third optical fiber interface (19) is connected to the input end c of the seventh optical fiber interface (34); the port d of the fourth optical fiber coupler (16) is connected to the input end a of the second optical switch (24); the output end c of the second optical switch (24) is connected to the input end a of the second reference optical fiber (25); The output end b of the second reference optical fiber (25) is connected to the second Faraday rotator (26).

8. The interactive foreign language speech training auxiliary system for hearing-impaired children according to claim 7, characterized in that: The fourth Michelson interference optical path comprises a fifth optical fiber coupler (20), a fourth photodetector (21), a fourth data acquisition card (22), and a fourth optical fiber interface (23); the output end d of the first optical filter (4) is connected to the port a of the fifth optical fiber coupler (20) so that the light source passes in one direction; the port b of the fifth optical fiber coupler (20) is connected to the input end a of the fourth photodetector (21); the output end b of the fourth photodetector (21) is connected to the input end a of the fourth data acquisition card (22) to collect data on the signal; the output end b of the fourth data acquisition card (22) is connected to the input end b of the microprocessor (29) to perform data analysis and processing; the port d of the fifth optical fiber coupler (20) is connected to the fourth optical fiber interface (23); the fourth optical fiber interface (23) is connected to the input end d of the seventh optical fiber interface (34); and the port c of the fifth optical fiber coupler (20) is connected to the input end b of the second optical switch (24).

9. The interactive foreign language speech training auxiliary system for hearing-impaired children according to claim 4, characterized in that: The input end a of the seventh optical fiber interface (34) is connected to the output end e of the seventh optical fiber interface (34); the output end e of the seventh optical fiber interface (34) is connected to the third Faraday rotator (35) via the sensing optical fiber a in the sensing module (39); the input end b of the seventh optical fiber interface (34) is connected to the output end f of the seventh optical fiber interface (34); the output end f of the seventh optical fiber interface (34) is connected to the fourth Faraday rotator (36) via the sensing optical fiber b in the sensing module (39); the input end c ... output end f of the seventh optical fiber interface (34). The output end g of the seventh optical fiber interface (34) is connected to the fifth Faraday rotator (37) via the sensing optical fiber c in the sensing module (39); the input end d of the seventh optical fiber interface (34) is connected to the output end h of the seventh optical fiber interface (34); the output end h of the seventh optical fiber interface (34) is connected to the sixth Faraday rotator (38) via the sensing optical fiber d in the sensing module (39); the fifth optical fiber interface (31) is connected to the input end a of the sixth optical fiber interface (32); and the output end b of the sixth optical fiber interface (32) is connected to the optical fiber in the display module (33).

10. The interactive foreign language speech training auxiliary system for hearing-impaired children according to claim 1, characterized in that: The two ends of the neck cover are respectively provided with a first Velcro (40) and a second Velcro (41), and when in use, the first Velcro (40) is adhered to the second Velcro (41).

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