CN104053108A - Intelligent auditory sense assisting equipment - Google Patents

Intelligent auditory sense assisting equipment Download PDF

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Publication number
CN104053108A
CN104053108A CN201410277127.8A CN201410277127A CN104053108A CN 104053108 A CN104053108 A CN 104053108A CN 201410277127 A CN201410277127 A CN 201410277127A CN 104053108 A CN104053108 A CN 104053108A
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described
connected
frequency
output
end
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CN201410277127.8A
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Chinese (zh)
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王涛宇
高强
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青岛喵星信息科技有限公司
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Priority to CN201410277127.8A priority Critical patent/CN104053108A/en
Publication of CN104053108A publication Critical patent/CN104053108A/en

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Abstract

The invention provides intelligent auditory sense assisting equipment. The intelligent auditory sense assisting equipment is of a behind-the-ear structure and comprises an ear hook, a sound guiding hook connected with the ear hook and an earplug connected with the other end of the sound guiding hook. The ear hook is provided with a switch, a charging socket and a volume adjuster, a salve MIC is arranged at the connecting position of the bottom of the ear hook and the sound guiding hook, a master MIC is arranged at the connecting position of the other end of the sound guiding hook and the earplug, and a cardiotachometer and an oximeter are arranged on the contacting portion of the ear hook and the auricula; the master MIC and the slave MIC are connected with a filtering and optimizing module of a DSP circuit, the DSP circuit outputs digital audio signals to an audio amplifying circuit, and the audio amplifying circuit is connected with a loud speaker. According to the intelligent auditory sense assisting equipment, in the sound collecting part, the double-MIC denoising technology is used for collecting sound signals, attenuation is conducted on environment noise according to the human body language frequency, and therefore it is guaranteed that a user can obtain superior experience.

Description

A kind of intelligent sense of hearing auxiliary equipment

Technical field

The present invention relates to electronic applications, particularly a kind of intelligent sense of hearing auxiliary equipment.

Background technology

Existing sense of hearing auxiliary equipment is mainly divided into boxlike, spectacle, hard of hearing formula, implicit form, open and special messenger's customized type is several, wherein with hard of hearing formula structure, uses the most extensive.Hard of hearing formula structure, comprising: ear-hang, be connected with ear-hang lead sound hook and with the earplug of leading the sound hook other end and being connected, the functional parts such as switch, charging socket and volume adjuster are set on ear-hang.The sense of hearing auxiliary equipment of supra-aural structure is worn convenience, firm, and user experiences comfortable, and compact conformation, is convenient to carry.

But the sense of hearing auxiliary equipment function singleness of existing supra-aural structure, only play the effect that gamut audio frequency amplifies, environmental noise is also amplified transmission in proportion, brought the great sense of hearing to pollute, for user's life has caused puzzlement, therefore it is current problem demanding prompt solution that the noise, how sense of hearing auxiliary equipment being collected filters.

Summary of the invention

The present invention proposes a kind of intelligent sense of hearing auxiliary equipment, has solved the problem that in prior art, environmental noise is amplified, causes the sense of hearing to pollute in proportion.

Technical scheme of the present invention is achieved in that

A kind of intelligent sense of hearing auxiliary equipment, it is hard of hearing formula structure, comprise: ear-hang, be connected with ear-hang lead sound hook and with the earplug of leading the sound hook other end and being connected, switch, charging socket and volume adjuster are set on described ear-hang, described ear-hang bottom with lead sound hook junction and be provided with from MIC, describedly lead the sound hook other end and earplug junction is provided with main MIC, described ear-hang and auricle contact site are provided with cardiotach ometer and oximeter;

Described main MIC is with filtering from MIC and DSP circuit and optimize module and be connected, and DSP circuit outputting digital audio signal is to audio amplifier circuit, and audio amplifier circuit is connected with loud speaker;

Described filtering and optimization module comprise the first subfilter, the second subfilter and senior filter; The first subfilter is processed main MIC voice data information, and its low-frequency cut-off frequency is 60Hz, and its high-frequency cut-off frequency is 500Hz, and output state is estimated x1 and estimation error covariance matrix p1, and the item that exceeds cut-off frequency scope in matrix x1 and p1 sets to 0; The second subfilter is processed from MIC voice data information, and its low-frequency cut-off frequency is 20Hz, and its high-frequency cut-off frequency is 20kHz, and output state is estimated x2 and estimation error covariance matrix p2, and the item that exceeds cut-off frequency scope in matrix x2 and p2 sets to 0; Described state estimation x1, x2 and estimation error covariance matrix p1, p2 delivers to senior filter, and by formula (1) and formula (2), merges together with the state estimation of senior filter, obtains global optimum and estimates and covariance matrix:

x ^ g = p g ( Σ i = 1 2 p i - 1 x ^ i ) - - - ( 1 )

p g = Σ i = 1 2 p i - 1 - - - ( 2 )

In formula, i=1,2;

The optimal estimation value of senior filter is reset to the state estimation of 2 subfilters,

x ^ i = x ^ g - - - ( 3 )

p i = β i - 1 p g - - - ( 4 )

Using main MIC voice data information as analyzing datum quantity, automatically adjust the size of p value, concrete adaptive algorithm is:

β 1, β 2meet β 1+ β 2=1 (5)

β 1 = 0.99 , p ≤ 2 2 / p , 2 ≤ p ≤ 5 1 / p , 5 ≤ p ≤ 10 2 / p , p ≥ 10 - - - ( 6 )

Described DSP circuit estimates according to global optimum and covariance matrix generates Composite tone information, and outputs to MCU and audio amplifier circuit;

Described cardiotach ometer and oximeter adopt a set of equipment time-sharing multiplex to detect, comprise: two LED lamps that arrange at auricle contact site and light-sensitive element, the light beam of two LED lamp output fixed wave length, light-sensitive element gathers the light returning through skin, tissue, blood diffuse reflection, and described DSP circuit calculates heart rate value and oximetry value;

Described DSP circuit is connected to MCU, and MCU uploads to intelligent hand-held terminal by bluetooth module by heart rate data, oximetry data and digital audio and video signals.

Alternatively, described audio amplifier circuit is built in described ear-hang, and it is two-layer configuration, and prime is power modulation portion, and rear class is voice modulation portion;

Described power modulation portion comprises: transformer, described transformer comprises former limit winding and secondary winding, former limit winding comprises first end and the second end, secondary winding comprises first end and the second end, former limit winding first end is connected to power supply, secondary winding the second end is connected to secondary earth potential, and former limit winding first end and secondary winding the second end are Same Name of Ends;

The first switching tube, its source electrode is connected to transformer primary side winding the second end, and its drain electrode is connected to former limit earth potential, and its grid is connected to the first switch driver;

The first switch driver, comprise the first transistor and transistor seconds, the first transistor is NPN transistor, transistor seconds is PNP transistor, the base stage of the first transistor and transistor seconds links together as control end, the emitter of the first transistor and transistor seconds links together as output, and the collector electrode of the first transistor is connected to described power supply, and the collector electrode of transistor seconds is connected to former limit earth potential;

Frequency generating circuit, comprises phase-locked loop, and it is connected to the crystal oscillator output of described DSP circuit; Low pass filter, is connected to the output of phase-locked loop; Voltage controlled oscillator, is connected to low pass filter output, and its output is leaded up to frequency multiplier circuit and fed back to phase-locked loop, and another road exports amplifier to, and the output of amplifier is connected to the control end of described the first switch driver;

Described frequency multiplier circuit comprises 3 frequency multipliers, 6 frequency multipliers and 9 frequency multipliers that are connected in parallel, and described 3 frequency multipliers, 6 frequency multipliers and 9 frequency multipliers are connected to described voltage controlled oscillator by the first voice operated switch, the second voice operated switch and the 3rd voice operated switch respectively;

Described the first voice operated switch, the second voice operated switch and the 3rd voice operated switch are connected with the volume adjuster on described ear-hang;

The first diode, its anodic bonding is to transformer secondary winding first end, and its negative electrode is connected to the first filter;

The first filter comprises the first filter inductor and the first filtering capacitor, the first filter inductor is connected to the negative electrode of described the first diode, the common port of the first filter inductor and the first filtering capacitor is connected to the feeder ear of described voice modulation portion, and the other end of the first filtering capacitor is connected to secondary earth potential;

Described voice modulation portion comprises: second switch pipe and the 3rd switching tube, the source electrode of second switch pipe is connected to described feeder ear, the source electrode of the drain electrode of second switch pipe and the 3rd switching tube links together and is jointly connected to the input of the second filter, the output of the second filter is connected to described loud speaker, and the drain electrode of the 3rd switching tube is connected to secondary earth potential;

Described the second filter comprises:

The second filter inductor and output block capacitor, be coupled in series between the input and output of the second filter;

The second filtering capacitor, is coupled between the second filter output and secondary earth potential;

Described voice modulation portion also comprises:

DA transducer, be connected to the audio output of described DSP circuit, digital audio and video signals is converted to simulated audio signal, its output is couple to the inverting input of the first comparator by input block capacitor, the normal phase input end of the first comparator receives sawtooth signal, and described the first comparator is according to sawtooth signal and simulated audio signal output audio comparison signal;

Second switch driver, the UC3714 of Qi Wei Texas Instruments chip, the audio frequency comparison signal based on control end input produces the switching drive signal of two-way complementation, and a road is coupled to described second switch tube grid, and another road is coupled to described the 3rd switching tube grid.

Alternatively, described bluetooth module is bluetooth bimodulus 4.0 modules, and online maintenance, data synchronously adopt bluetooth 4.0BLE pattern, and voice call adopts classical bluetooth mode.

The invention has the beneficial effects as follows:

(1) sound collection partly adopts two MIC noise reduction technologies to gather voice signal, take Body Languages frequency as foundation, and environmental noise is decayed, and has guaranteed that user obtains superior experience sense;

(2) heart rate collection adopts reflective heart rate acquisition technique, blood oxygen saturation parameter adopts infrared reflection blood oxygen saturation acquisition technique, and the two adopts a set of testing circuit time-sharing multiplex, has saved cost, simplify circuit, to user, provide the authentic data of rehabilitation to support;

(3) communication by bluetooth 4.0 bimodulus technology realize data, voice bidirectional transmits.

Accompanying drawing explanation

In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.

Fig. 1 is the overall structure schematic diagram of the present invention's intelligence sense of hearing auxiliary equipment;

Fig. 2 is the circuit control block diagram of the present invention's intelligence sense of hearing auxiliary equipment;

Fig. 3 is the theory diagram of the DSP circuit of the present invention's intelligence sense of hearing auxiliary equipment;

Fig. 4 is the cardiotach ometer of the present invention's intelligence sense of hearing auxiliary equipment and the circuit control block diagram of oximeter;

Fig. 5 is the circuit diagram of the audio amplifier circuit of the present invention's intelligence sense of hearing auxiliary equipment.

Embodiment

Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiment.Embodiment based in the present invention, those of ordinary skills, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.

As shown in Figure 1, intelligent sense of hearing auxiliary equipment of the present invention, it is hard of hearing formula structure, comprise: ear-hang 1000, what be connected with ear-hang leads sound hook 2000, and with the earplug 4000 of leading sound hook 2000 other ends and being connected, on described ear-hang 1000, switch 1002 is set, charging socket 1001 and volume adjuster 1003, described ear-hang 1000 bottoms with lead sound hook 2000 junctions and be provided with from MIC120, describedly lead sound hook 2000 other ends and earplug 4000 junctions are provided with main MIC110, described ear-hang 1000 is provided with cardiotach ometer and oximeter (not shown in figure 1) with user's auricle contact site.

As shown in Figure 2, described main MIC110 is with filtering from MIC120 and DSP circuit 130 and optimize module 131 and be connected, and DSP circuit 130 outputting digital audio signals are to audio amplifier circuit 600, and audio amplifier circuit 600 is connected with loud speaker 700.

Described cardiotach ometer 501 and oximeter 502 adopt a set of equipment time-sharing multiplex to detect, as shown in Figure 2 and Figure 4, comprise: two the LED lamps 5011,5012 and the light-sensitive element 5013 that at auricle contact site, arrange, the light beam of two LED lamp output fixed wave length, 5013 pairs of light that return through skin, tissue, blood diffuse reflection of light-sensitive element gather, and by DSP circuit 130, calculate heart rate value and oximetry value.Described DSP circuit 130 is connected to MCU400, and MCU400 uploads to intelligent hand-held terminal 300 by bluetooth module 200 by heart rate data, blood oxygen saturation data and digital audio and video signals.Intelligent sense of hearing auxiliary equipment of the present invention provides sense of hearing booster action for hearing loss crowd, making hearing loss crowd obtain the reasonable sense of hearing experiences, exchange smooth and easy, in the time of auditory rehabilitation, body parameter collection to user, Duo Jia research institution studies show that, cardiovascular disease, obesity is to cause an important factor of hearing loss, therefore in Deaf and Hard of Hearing Talents's treatment, in rehabilitation course, to heart rate, the isoparametric round-the-clock detection of blood oxygen, statistics can provide data supporting for Deaf and Hard of Hearing Talents, so that it does rational rehabilitation programme and rule of life.

MCU of the present invention adopts super low-power consumption IC, its function is inquiry heart rate data, oximetry data, and be combined into packet, realize storage, when user is connected intelligent sense of hearing auxiliary equipment with intelligent hand-held terminal, data are synchronized to intelligent hand-held terminal, and the director data sending according to bluetooth module, Bluetooth communication content distinguished.Preferably, described bluetooth module 200 is bluetooth bimodulus 4.0 modules, as while calling, MCU controls bluetooth 4.0 modules and switches to classical bluetooth mode, realizes voice call.Bluetooth 4.0 modules are bimodulus bluetooth 4.0, can realize the transmission of small data packets and audio stream; During its normal work, online maintenance, data synchronously adopt bluetooth 4.0BLE pattern, adopt classical bluetooth mode during voice call.

As shown in Figure 3, described filtering and optimization module 131 comprise the first subfilter 1311, the second subfilter 1312 and senior filter 1314; The first subfilter 1311 is processed main MIC110 voice data information, 60~500Hz is human body one's voice in speech frequency, therefore, the low-frequency cut-off frequency of the first subfilter 1311 is 60Hz, its high-frequency cut-off frequency is 500Hz, output state is estimated x1 and estimation error covariance matrix p1, and the item that exceeds cut-off frequency scope in matrix x1 and p1 sets to 0; The second subfilter 1312 is processed from MIC120 voice data information, human auditory system frequency range is 20~20kHz, therefore the second subfilter 1312 low-frequency cut-off frequencies are 20Hz, its high-frequency cut-off frequency is 20kHz, output state is estimated x2 and estimation error covariance matrix p2, and the item that exceeds cut-off frequency scope in matrix x2 and p2 sets to 0; Described state estimation x1, x2 and estimation error covariance matrix p1, p2 delivers to senior filter 1314, and by formula (1) and formula (2), merges together with the state estimation of senior filter 1314, obtains global optimum and estimates and covariance matrix:

x ^ g = p g ( Σ i = 1 2 p i - 1 x ^ i ) - - - ( 1 )

p g = Σ i = 1 2 p i - 1 - - - ( 2 )

In formula, i=1,2;

The optimal estimation value of senior filter 1314 is reset to the state estimation of 2 subfilters,

x ^ i = x ^ g - - - ( 3 )

p i = β i - 1 p g - - - ( 4 )

Using main MIC110 voice data information as analyzing datum quantity, automatically adjust the size of p value, concrete adaptive algorithm is:

β 1, β 2meet β 1+ β 2=1 (5)

β 1 = 0.99 , p ≤ 2 2 / p , 2 ≤ p ≤ 5 1 / p , 5 ≤ p ≤ 10 2 / p , p ≥ 10 - - - ( 6 )

Described DSP circuit 130 estimates according to global optimum and covariance matrix generates Composite tone information, and outputting digital audio signal is to MCU400 and audio amplifier circuit 600.

Audio signal after the first subfilter 1311 is filtered is the speak audio signal of frequency of human body, audio signal after the second subfilter 1312 is filtered is the audio signal of the human body range of audibility, using main MIC110 voice data information as analyzing datum quantity, by environmental noise decay, make user's the sense of hearing experience more comfortable.

Audio amplifier circuit 600 of the present invention is built in ear-hang 1000, and as shown in Figure 5, it is two-layer configuration, and prime is power modulation portion 10, and rear class is voice modulation portion 20.

Described power modulation portion 10 comprises: transformer 11, comprise former limit winding and secondary winding, former limit winding comprises first end and the second end, secondary winding comprises first end and the second end, former limit winding first end is connected to power supply 1, secondary winding the second end is connected to secondary earth potential, and former limit winding first end and secondary winding the second end are Same Name of Ends; The first switching tube 12, its source electrode is connected to transformer primary side winding the second end, and its drain electrode is connected to former limit earth potential, and its grid is connected to the first switch driver 13; The first switch driver 13, comprise the first transistor and transistor seconds, the first transistor is NPN transistor, transistor seconds is PNP transistor, the base stage of the first transistor and transistor seconds links together as control end, the emitter of the first transistor and transistor seconds links together as output, and the collector electrode of the first transistor is connected to described power supply 1, and the collector electrode of transistor seconds is connected to former limit earth potential; Frequency generating circuit 40, comprises phase-locked loop 41, and it is connected to the crystal oscillator output of described DSP circuit 130; Low pass filter 42, is connected to the output of phase-locked loop 41; Voltage controlled oscillator 43, be connected to low pass filter 42 outputs, its output is leaded up to frequency multiplier circuit and is fed back to phase-locked loop 41, and another road exports amplifier 44 to, the output output frequency control signal f1 of amplifier 44 and be connected to the control end of described the first switch driver 13; Described frequency multiplier circuit comprises 3 frequency multiplier 45,6 frequency multipliers 46 and 9 frequency multipliers 47 that are connected in parallel, and described 3 frequency multipliers, 6 frequency multipliers and 9 frequency multipliers are connected to described voltage controlled oscillator 43 by the first voice operated switch 51, the second voice operated switch 52 and the 3rd voice operated switch 53 respectively; Described the first voice operated switch 51, the second voice operated switch 52 are connected with the volume adjuster 1003 on described ear-hang with the 3rd voice operated switch 53, by operation volume adjuster 1003, between the first voice operated switch 51, the second voice operated switch 52 and the 3rd voice operated switch 53, switch, change the signal frequency of the first switch driver 13 control ends, and then the switching frequency of change the first switching tube 12, the watt level of regulating power modulation portion 10 outputs; The first diode 14, its anodic bonding is to transformer secondary winding first end, and its negative electrode is connected to the first filter; The first filter comprises the first filter inductor 15 and the first filtering capacitor 16, the first filter inductor 15 is connected to the negative electrode of described the first diode 14, the common port of the first filter inductor 15 and the first filtering capacitor 16 is connected to the feeder ear of described voice modulation portion, and the other end of the first filtering capacitor 16 is connected to secondary earth potential.

Described voice modulation portion 20 comprises: second switch pipe 22 and the 3rd switching tube 23, the source electrode of second switch pipe 22 is connected to described feeder ear, the source electrode of the drain electrode of second switch pipe 22 and the 3rd switching tube 23 links together and is jointly connected to the input of the second filter, the drain electrode that the output of the second filter is connected to described loud speaker 700, the three switching tubes 23 is connected to secondary earth potential; Described the second filter comprises: the second filter inductor 25 and output block capacitor 26, be coupled in series between the input and output of the second filter; The second filtering capacitor 27, is coupled between the second filter output and secondary earth potential.

Described voice modulation portion 20 also comprises: DA transducer 140, be connected to the audio output of described DSP circuit 130, digital audio and video signals is converted to simulated audio signal, its output is couple to the inverting input of the first comparator 150 by input block capacitor 151, the normal phase input end of the first comparator 150 receives sawtooth signal Vsaw, and described the first comparator 151 is according to sawtooth signal and simulated audio signal output audio comparison signal f2; Second switch driver 24, the UC3714 of Qi Wei Texas Instruments chip, audio frequency comparison signal based on control end input produces the switching drive signal of two-way complementation, and a road is coupled to described second switch tube grid 22, and another road is coupled to described the 3rd switching tube grid 23.

Sound collection of the present invention partly adopts two MIC noise reduction technologies to gather voice signal, take Body Languages frequency as foundation, and environmental noise is decayed, and has guaranteed that user obtains superior experience sense; Heart rate collection adopts reflective heart rate acquisition technique, blood oxygen saturation parameter adopts infrared reflection blood oxygen saturation acquisition technique, and the two adopts a set of testing circuit time-sharing multiplex, has saved cost, simplify circuit, to user, provide the authentic data of rehabilitation to support; Communication by bluetooth 4.0 bimodulus technology realize data, voice bidirectional transmits.

The foregoing is only preferred embodiment of the present invention, in order to limit the present invention, within the spirit and principles in the present invention not all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.

Claims (3)

1. an intelligent sense of hearing auxiliary equipment, it is hard of hearing formula structure, comprise: ear-hang, be connected with ear-hang lead sound hook and with the earplug of leading the sound hook other end and being connected, switch, charging socket and volume adjuster are set on described ear-hang, it is characterized in that, described ear-hang bottom with lead sound hook junction and be provided with from MIC, described in lead the sound hook other end and earplug junction is provided with main MIC, described ear-hang and auricle contact site are provided with cardiotach ometer and oximeter;
Described main MIC is with filtering from MIC and DSP circuit and optimize module and be connected, and DSP circuit outputting digital audio signal is to audio amplifier circuit, and audio amplifier circuit is connected with loud speaker;
Described filtering and optimization module comprise the first subfilter, the second subfilter and senior filter; The first subfilter is processed main MIC voice data information, and its low-frequency cut-off frequency is 60Hz, and its high-frequency cut-off frequency is 500Hz, and output state is estimated x1 and estimation error covariance matrix p1, and the item that exceeds cut-off frequency scope in matrix x1 and p1 sets to 0; The second subfilter is processed from MIC voice data information, and its low-frequency cut-off frequency is 20Hz, and its high-frequency cut-off frequency is 20kHz, and output state is estimated x2 and estimation error covariance matrix p2, and the item that exceeds cut-off frequency scope in matrix x2 and p2 sets to 0; Described state estimation x1, x2 and estimation error covariance matrix p1, p2 delivers to senior filter, and by formula (1) and formula (2), merges together with the state estimation of senior filter, obtains global optimum and estimates and covariance matrix:
x ^ g = p g ( Σ i = 1 2 p i - 1 x ^ i ) - - - ( 1 )
p g = Σ i = 1 2 p i - 1 - - - ( 2 )
In formula, i=1,2;
The optimal estimation value of senior filter is reset to the state estimation of 2 subfilters,
x ^ i = x ^ g - - - ( 3 )
p i = β i - 1 p g - - - ( 4 )
Using main MIC voice data information as analyzing datum quantity, automatically adjust the size of p value, concrete adaptive algorithm is:
β 1, β 2meet β 1+ β 2=1 (5)
β 1 = 0.99 , p ≤ 2 2 / p , 2 ≤ p ≤ 5 1 / p , 5 ≤ p ≤ 10 2 / p , p ≥ 10 - - - ( 6 )
Described DSP circuit estimates according to global optimum and covariance matrix generates Composite tone information, and outputs to MCU and audio amplifier circuit;
Described cardiotach ometer and oximeter adopt a set of equipment time-sharing multiplex to detect, comprise: two LED lamps that arrange at auricle contact site and light-sensitive element, the light beam of two LED lamp output fixed wave length, light-sensitive element gathers the light returning through skin, tissue, blood diffuse reflection, and described DSP circuit calculates heart rate value and oximetry value;
Described DSP circuit is connected to MCU, and MCU uploads to intelligent hand-held terminal by bluetooth module by heart rate data, oximetry data and digital audio and video signals.
2. intelligent sense of hearing auxiliary equipment as claimed in claim 1, is characterized in that, described audio amplifier circuit is built in described ear-hang, and it is two-layer configuration, and prime is power modulation portion, and rear class is voice modulation portion;
Described power modulation portion comprises: transformer, described transformer comprises former limit winding and secondary winding, former limit winding comprises first end and the second end, secondary winding comprises first end and the second end, former limit winding first end is connected to power supply, secondary winding the second end is connected to secondary earth potential, and former limit winding first end and secondary winding the second end are Same Name of Ends;
The first switching tube, its source electrode is connected to transformer primary side winding the second end, and its drain electrode is connected to former limit earth potential, and its grid is connected to the first switch driver;
The first switch driver, comprise the first transistor and transistor seconds, the first transistor is NPN transistor, transistor seconds is PNP transistor, the base stage of the first transistor and transistor seconds links together as control end, the emitter of the first transistor and transistor seconds links together as output, and the collector electrode of the first transistor is connected to described power supply, and the collector electrode of transistor seconds is connected to former limit earth potential;
Frequency generating circuit, comprises phase-locked loop, and it is connected to the crystal oscillator output of described DSP circuit; Low pass filter, is connected to the output of phase-locked loop; Voltage controlled oscillator, is connected to low pass filter output, and its output is leaded up to frequency multiplier circuit and fed back to phase-locked loop, and another road exports amplifier to, and the output of amplifier is connected to the control end of described the first switch driver;
Described frequency multiplier circuit comprises 3 frequency multipliers, 6 frequency multipliers and 9 frequency multipliers that are connected in parallel, and described 3 frequency multipliers, 6 frequency multipliers and 9 frequency multipliers are connected to described voltage controlled oscillator by the first voice operated switch, the second voice operated switch and the 3rd voice operated switch respectively;
Described the first voice operated switch, the second voice operated switch and the 3rd voice operated switch are connected with the volume adjuster on described ear-hang;
The first diode, its anodic bonding is to transformer secondary winding first end, and its negative electrode is connected to the first filter;
The first filter comprises the first filter inductor and the first filtering capacitor, the first filter inductor is connected to the negative electrode of described the first diode, the common port of the first filter inductor and the first filtering capacitor is connected to the feeder ear of described voice modulation portion, and the other end of the first filtering capacitor is connected to secondary earth potential;
Described voice modulation portion comprises: second switch pipe and the 3rd switching tube, the source electrode of second switch pipe is connected to described feeder ear, the source electrode of the drain electrode of second switch pipe and the 3rd switching tube links together and is jointly connected to the input of the second filter, the output of the second filter is connected to described loud speaker, and the drain electrode of the 3rd switching tube is connected to secondary earth potential;
Described the second filter comprises:
The second filter inductor and output block capacitor, be coupled in series between the input and output of the second filter;
The second filtering capacitor, is coupled between the second filter output and secondary earth potential;
Described voice modulation portion also comprises:
DA transducer, be connected to the audio output of described DSP circuit, digital audio and video signals is converted to simulated audio signal, its output is couple to the inverting input of the first comparator by input block capacitor, the normal phase input end of the first comparator receives sawtooth signal, and described the first comparator is according to sawtooth signal and simulated audio signal output audio comparison signal;
Second switch driver, the UC3714 of Qi Wei Texas Instruments chip, the audio frequency comparison signal based on control end input produces the switching drive signal of two-way complementation, and a road is coupled to described second switch tube grid, and another road is coupled to described the 3rd switching tube grid.
3. intelligent sense of hearing auxiliary equipment as claimed in claim 1, is characterized in that, described bluetooth module is bluetooth bimodulus 4.0 modules, and online maintenance, data synchronously adopt bluetooth 4.0BLE pattern, and voice call adopts classical bluetooth mode.
CN201410277127.8A 2014-06-19 2014-06-19 Intelligent auditory sense assisting equipment CN104053108A (en)

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CN104274965A (en) * 2014-09-28 2015-01-14 青岛康合伟业商贸有限公司 Wireless children's movement feature detection system
CN104305974A (en) * 2014-09-23 2015-01-28 青岛康和食品有限公司 Health monitoring bracelet applied to smart mobile phone
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WO2019153707A1 (en) * 2018-02-12 2019-08-15 易力声科技(深圳)有限公司 Personalized earphones for person having abnormal auditory sense

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