CN110248267A - A kind of Rouser and electronic equipment - Google Patents
A kind of Rouser and electronic equipment Download PDFInfo
- Publication number
- CN110248267A CN110248267A CN201910515689.4A CN201910515689A CN110248267A CN 110248267 A CN110248267 A CN 110248267A CN 201910515689 A CN201910515689 A CN 201910515689A CN 110248267 A CN110248267 A CN 110248267A
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- 230000005236 sound signal Effects 0.000 claims abstract description 44
- 230000001960 triggered effect Effects 0.000 claims abstract description 9
- 230000007613 environmental effect Effects 0.000 claims abstract description 7
- 238000006243 chemical reaction Methods 0.000 claims description 11
- 230000003321 amplification Effects 0.000 claims description 5
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 5
- 230000005611 electricity Effects 0.000 claims description 4
- 230000005669 field effect Effects 0.000 claims description 4
- 210000000214 mouth Anatomy 0.000 claims description 3
- 238000002604 ultrasonography Methods 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000000295 complement effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 229910044991 metal oxide Inorganic materials 0.000 description 2
- 150000004706 metal oxides Chemical class 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000686 essence Substances 0.000 description 1
- 229910052738 indium Inorganic materials 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 230000002618 waking effect Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/10—Earpieces; Attachments therefor ; Earphones; Monophonic headphones
- H04R1/1041—Mechanical or electronic switches, or control elements
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2201/00—Details of transducers, loudspeakers or microphones covered by H04R1/00 but not provided for in any of its subgroups
- H04R2201/10—Details of earpieces, attachments therefor, earphones or monophonic headphones covered by H04R1/10 but not provided for in any of its subgroups
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Telephone Function (AREA)
Abstract
This application discloses a kind of Rousers, comprising: first sensor, for obtaining target sound signal and being converted to first voltage；Second sensor, for obtaining environmental sound signal and being converted to second voltage；Comparison circuit for obtaining the voltage difference of the first voltage and the second voltage, and judges whether the target sound signal is wake-up signal；Back-end circuit, for when the target sound signal is wake-up signal, the back-end circuit is triggered unlatching.It is not likely to produce false triggering by the Rouser, improves the robustness of system.Moreover, also disclosing the electronic equipment including the Rouser.
Description
Technical field
This application involves sound signal processing technical fields, it particularly relates to a kind of Rouser and electronic equipment.
Background technique
Extremely low power dissipation, long-term online audio monitoring and wake-up scheme, in consumer electronics, Internet of Things, security protection, national defence
Military industry field is all widely used scene.With tws (abbreviation of True Wireless Stereo, i.e., real wireless stereo)
For bluetooth headset, the overwhelming majority all wakes up sensor and its back-end circuit by the way of tapping, touching.When using voice
When mode wakes up sensor and back-end circuit, voice assistant needs online for a long time monitor with the presence or absence of wake-up signal, so as to cause function
Consumption increases, and significantly reduces the cruising ability of tws earphone.Moreover, noisy environment is easy trigger sensor repeatedly, function is also resulted in
Consumption increases.
For the big problem of power consumption in the related technology, currently no effective solution has been proposed.
Summary of the invention
For the problems in the relevant technologies, the application proposes a kind of Rouser and electronic equipment, can be improved system
Robustness makes the system be not easily susceptible to environmental disturbances and generate false triggering, and then reduces power consumption.
The technical solution of the application is achieved in that
According to the one aspect of the application, a kind of Rouser is provided, comprising:
First sensor, for obtaining target sound signal and being converted to first voltage；
Second sensor, for obtaining environmental sound signal and being converted to second voltage；
Comparison circuit for obtaining the voltage difference of the first voltage and the second voltage, and judges the target sound
Whether sound signal is wake-up signal；
Back-end circuit, for when the target sound signal is wake-up signal, the back-end circuit is triggered unlatching.
Wherein, the first sensor and the second sensor include MEMS (MEMS) energy converter.
Wherein, the first sensor and the second sensor include PZT (piezoelectric transducer).
Wherein, the first sensor and the second sensor include piezoelectric mems energy converter.
Wherein, when the voltage difference of the first voltage and the second voltage is greater than specific threshold, the comparison circuit
Judge that the target sound signal is wake-up signal.
Wherein, the first voltage is greater than the second voltage.
Wherein, when the target sound signal is not wake-up signal, the Rouser keeps listening mode, and control is opened
Module is closed so that the comparison circuit persistently obtains the voltage difference of the first voltage and the second voltage, and described in closing
Back-end circuit；
When the target sound signal is wake-up signal, the Rouser is converted to awakening mode from listening mode,
The wake-up signal opens the back-end circuit by the switch module, and the comparison circuit stops obtaining described first
The voltage difference of voltage and the second voltage.
Wherein, the Rouser further includes the first amplifier and the second amplifier, wherein the of the first sensor
One voltage is input to the comparison circuit after first amplifier amplification, described in the second voltage warp of the second sensor
The comparison circuit is input to after the amplification of second amplifier.
Wherein, the Rouser further includes the first impedance matching circuit and the second impedance matching circuit, wherein described
One impedance matching circuit is connected between the first sensor and first amplifier, and second impedance matching circuit connects
It is connected between the second sensor and second amplifier.
Wherein, first impedance matching circuit and second impedance matching circuit include junction field effect transistor.
Wherein, when the target sound signal is not wake-up signal, the switch module respectively with first impedance
Match circuit and second impedance matching circuit electrical connection, and first impedance matching circuit and second impedance
It is connected with circuit.
Wherein, the back-end circuit includes analog to digital conversion circuit, and analog-digital conversion circuit as described obtains the first sensor
Voltage and be converted to the first digital voltage signal.
Wherein, the back-end circuit further includes third amplifier, wherein the third amplifier is connected to described first and passes
Between sensor and analog-digital conversion circuit as described.
Wherein, the back-end circuit further includes third impedance matching circuit, wherein the third impedance matching circuit connection
Between the first sensor and the third amplifier, for adjusting the output impedance of the first sensor.
Wherein, when the target sound signal is wake-up signal, the switch module and third impedance matching electricity
Road electrical connection, and the third impedance matching circuit is connected.
Wherein, the back-end circuit includes sound processing chip, wherein the sound processing chip receives first number
Word voltage signal and carry out keyword identification and matching.
Wherein, the back-end circuit includes processor, and after Keywords matching success, the processor, which is triggered, is called out
It wakes up.
Wherein, the first sensor is directed toward the sound source position of the target sound signal, and the second sensor is directed toward
External environment.
Wherein, the sound source of the target sound signal includes the oral cavity of people, loudspeaker, ultrasonic transducer.
Wherein, the Rouser includes voice Rouser, and voice frequency range is 20Hz to 20kHz.
Wherein, the voice Rouser includes microphone.
Wherein, the Rouser includes ultrasonic Rouser, and the frequency range of ultrasonic wave is greater than 20kHz.
Wherein, the ultrasonic Rouser includes piezoelectric mems ultrasonic transducer.
According to the another aspect of the application, a kind of electronic equipment, including above-mentioned Rouser, the Rouser are provided
Be set in the electronic equipment, for after receiving the target sound signal of predetermined keyword, by the electronic equipment from
Listening mode is converted to operating mode.
The Rouser and electronic equipment of the application obtains target sound signal and ambient sound using two sensors
Signal is simultaneously respectively converted into first voltage and second voltage, and comparison circuit obtains the voltage difference of first voltage and second voltage and sentences
Whether disconnected target sound signal is wake-up signal, and when the judgment result is yes, back-end circuit is triggered unlatching.Using the technical side
The Rouser of case is not likely to produce false triggering, improves the robustness of system and reduces system power dissipation.
Detailed description of the invention
In order to illustrate the technical solutions in the embodiments of the present application or in the prior art more clearly, below will be to institute in embodiment
Attached drawing to be used is needed to be briefly described, it should be apparent that, the accompanying drawings in the following description is only some implementations of the application
Example, for those of ordinary skill in the art, without creative efforts, can also obtain according to these attached drawings
Obtain other attached drawings.
Fig. 1 is the schematic diagram according to a kind of Rouser of the embodiment of the present application；
Fig. 2 is the schematic diagram according to another Rouser of the embodiment of the present application.
Specific embodiment
Below in conjunction with the attached drawing in the embodiment of the present application, technical solutions in the embodiments of the present application carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of embodiments of the present application, instead of all the embodiments.It is based on
Embodiment in the application, those of ordinary skill in the art's every other embodiment obtained belong to the application protection
Range.
According to an embodiment of the present application, a kind of Rouser is provided, the robustness of system is improved, is not easy the system
False triggering is generated by environmental disturbances.
As shown in Figure 1, the Rouser according to the embodiment of the present application includes:
First sensor, for obtaining target sound signal and being converted to first voltage；
Second sensor, for obtaining environmental sound signal and being converted to second voltage；
Comparison circuit, for obtaining the voltage difference of first voltage and second voltage, and judge target sound signal whether be
Wake-up signal；
Back-end circuit, for when target sound signal is wake-up signal, back-end circuit is triggered unlatching.
Based on this, the Rouser of the embodiment of the present application obtains target sound signal and ambient sound using two sensors
Sound signal is simultaneously respectively converted into first voltage and second voltage, and the voltage difference of comparison circuit acquisition first voltage and second voltage is simultaneously
Judge whether target sound signal is wake-up signal, when the judgment result is yes, back-end circuit is triggered unlatching.Using the technology
The Rouser of scheme is not likely to produce false triggering, improves the robustness of system and reduces system power dissipation.
In some embodiments, first sensor and second sensor include MEMS (Micro-Electro-
The abbreviation of Mechanical System, i.e. MEMS) energy converter.Compared to traditional ECM (Electret
The abbreviation of Capacitor Microphone, i.e. electret condenser microphone), MEMS transducer is easy and CMOS
(abbreviation of Complementary Metal Oxide Semiconductor, i.e. complementary metal oxide semiconductor) technique and
Other voicefrequency circuits are integrated, and have improved noise removing performance and good RF (abbreviation of Radio Frequency,
That is radio frequency) and EMI Electromagnetic Interference abbreviation, i.e. electromagnetic interference) inhibit.
In some embodiments, first sensor and second sensor include PZT (piezoelectric transducer).It is changed compared to capacitive
Energy device needs provide DC offset voltage on two pole plates, and PZT (piezoelectric transducer) can generate charge, therefore, piezoelectricity by piezoelectric effect
Energy converter does not need direct current biasing.Therefore, compared to capacitance-type transducer, PZT (piezoelectric transducer) reduces power consumption.
In some embodiments, first sensor and second sensor include piezoelectric mems energy converter.
In some embodiments, first sensor is directed toward the sound source position of target sound signal, and second sensor is directed toward outer
Portion's environment.Wherein, the sound source of target sound signal includes that oral cavity, loudspeaker, ultrasonic transducer or the sensor of people can sense
Other sound sources.
In some embodiments, Rouser includes voice Rouser or ultrasonic Rouser.Preferably, voice wakes up
Device includes microphone.Wherein, voice frequency range is 20Hz to 20kHz.Preferably, since the frequency range of human sound is
300Hz to 3kHz, the voice frequency range of the voice Rouser are 300Hz to 3kHz.In some embodiments, ultrasound wakes up
Device includes piezoelectric mems ultrasonic transducer (PMUT, i.e. Piezoelectric Micromachined Ultrasound
The abbreviation of Transducer).The frequency range of ultrasonic wave is greater than 20kHz.Preferably, the frequency range of ultrasonic wave be 20kHz extremely
200kHz。
Referring to fig. 2, Rouser has both of which, i.e. listening mode and awakening mode.In some embodiments, work as mesh
When mark voice signal is not wake-up signal, Rouser keeps listening mode, and control switch module is so that comparison circuit persistently obtains
The voltage difference of first voltage and second voltage is taken, and closes back-end circuit.When target sound signal is wake-up signal, wake up
Device is converted to awakening mode from listening mode, and wake-up signal opens back-end circuit by switch module, and comparison circuit stops
Only obtain the voltage difference of first voltage and second voltage.The switch module will be in subsequent detailed description.
In some embodiments, first sensor is connected to the input terminal of the first amplifier through the first impedance matching circuit,
The output end of first amplifier is connected to the input terminal of comparison circuit.Second sensor is connected to through the second impedance matching circuit
The output end of the input terminal of two amplifiers, the second amplifier is connected to the input terminal of comparison circuit.First impedance matching circuit and
Second impedance matching circuit is respectively used to adjust the output impedance of first sensor and second sensor.Under normal circumstances, first
Impedance matching circuit and the second impedance matching circuit for reducing first sensor and second sensor output impedance.Some
In embodiment, the first impedance matching circuit and the second impedance matching circuit include junction field effect transistor (JFET, i.e.,
The abbreviation of Junction Field-Effect Transistor).Moreover, because first sensor and second sensor are converted
Obtained voltage is smaller, and it is electric to be input to comparison again after generally amplifying voltage signal using the first amplifier and the second amplifier
Road.
The input terminal of comparison circuit, which receives, passes through amplified first voltage and second voltage, and according to first voltage and the
The voltage difference of two voltages judges whether target sound signal is wake-up signal.In embodiments herein, first voltage is greater than
Second voltage.And when the voltage difference of first voltage and second voltage is greater than specific threshold, comparison circuit judges target sound
Signal is wake-up signal.For example, a sound threshold pressure differential is set to the received acoustic pressure of first sensor and second sensor institute, such as
60dBSPL, this sound pressure level correspond to the wake-up signal that voltage amplitude is 1V.When the voltage difference that comparison circuit detects is greater than 1V
When, just wake-up signal is exported in the output end of comparison circuit.In this case, wake-up signal is not easily susceptible to the dry of ambient noise
It disturbs, reduces the probability for generating false triggering back-end circuit.
In some embodiments, back-end circuit includes analog to digital conversion circuit, sound processing chip and processor.
Analog to digital conversion circuit obtains the voltage of first sensor and is converted to the first digital voltage signal.In some embodiments
In, in order to be conducive to the analog signal that analog to digital conversion circuit obtains proper range, first sensor is through third impedance matching circuit
The input terminal of third amplifier is connected, the output end of third amplifier is connected to the input terminal of analog to digital conversion circuit.In this feelings
Under condition, third impedance matching circuit is used to adjust the output impedance of first sensor, and analog-digital converter will pass through the voltage of amplification
Be converted to the first digital voltage signal.In some embodiments, since the first amplifier and the second amplifier are only used for waking up step
(lower voltage level is only needed) in rapid, and third amplifier amplifies the first voltage obtained from first sensor to be used for sound
(higher voltage level is needed) in sound identification step, and therefore, the gain amplifier of third amplifier is greater than the first amplifier and the
The gain amplifier of two amplifiers.In further embodiments, the gain amplifier of third amplifier can less than the first amplifier and
The gain amplifier of second amplifier.
In some embodiments, when target sound signal is not wake-up signal, switch module respectively with the first impedance
It is electrically connected with circuit and the second impedance matching circuit, and the first impedance matching circuit and the conducting of the second impedance matching circuit, after
And makes the first impedance matching circuit, the second impedance matching circuit and comparison circuit form access and continue working.
When target sound signal is wake-up signal, switch module is electrically connected with third impedance matching circuit, and third
Impedance matching circuit conducting, then makes third impedance matching circuit, third amplifier and analog to digital conversion circuit form access.It changes
Sentence is talked about, and switch module controls the on or off of different conductive paths based on the wake-up signal that comparison circuit exports, thus
The acoustic information that first sensor and second sensor are sensed is transferred to comparison circuit and back-end circuit.
Sound processing chip receives the first digital voltage signal and carries out keyword identification and matching.Work as Keywords matching
After success, processor is triggered and wake-up.
Based on above technical solution, the Rouser of the application keeps extremely low power dissipation when being in listening mode, thus
Monitoring power consumption is reduced compared to existing Rouser.And under more noisy environmental noise, not false triggering back-end circuit,
When listening to wake-up signal, back-end circuit can be waken up step by step, to improve the robustness of system.
In addition, the electronic equipment includes above-mentioned Rouser present invention also provides a kind of electronic equipment, Rouser is set
It is placed in electronic equipment, for after receiving the target sound signal of predetermined keyword, electronic equipment to be turned from listening mode
Shift to operating mode.In embodiments herein, which includes earphone, tablet computer, digital camera, vehicle-mounted system
System, smart phone, robot or wearable device.
The foregoing is merely the preferred embodiments of the application, not to limit the application, all essences in the application
Within mind and principle, any modification, equivalent replacement, improvement and so on be should be included within the scope of protection of this application.
Claims (24)
1. a kind of Rouser characterized by comprising
First sensor, for obtaining target sound signal and being converted to first voltage；
Second sensor, for obtaining environmental sound signal and being converted to second voltage；
Comparison circuit for obtaining the voltage difference of the first voltage and the second voltage, and judges the target sound letter
It number whether is wake-up signal；
Back-end circuit, for when the target sound signal is wake-up signal, the back-end circuit is triggered unlatching.
2. Rouser according to claim 1, which is characterized in that the first sensor and the second sensor packet
Include MEMS (MEMS) energy converter.
3. Rouser according to claim 1, which is characterized in that the first sensor and the second sensor packet
Include PZT (piezoelectric transducer).
4. Rouser according to claim 1, which is characterized in that the first sensor and the second sensor packet
Include piezoelectric mems energy converter.
5. Rouser according to claim 1, which is characterized in that when the electricity of the first voltage and the second voltage
When pressure difference is greater than specific threshold, the comparison circuit judges that the target sound signal is wake-up signal.
6. Rouser according to claim 5, which is characterized in that the first voltage is greater than the second voltage.
7. Rouser according to claim 1, which is characterized in that
When the target sound signal is not wake-up signal, the Rouser keeps listening mode, control switch module with
So that the comparison circuit is persistently obtained the voltage difference of the first voltage and the second voltage, and closes the rear end electricity
Road；
When the target sound signal is wake-up signal, the Rouser is converted to awakening mode from listening mode, described
Wake-up signal opens the back-end circuit by the switch module, and the comparison circuit stops obtaining the first voltage
With the voltage difference of the second voltage.
8. Rouser according to claim 7, which is characterized in that the Rouser further includes the first amplifier and
Two amplifiers, wherein it is electric that the first voltage of the first sensor is input to the comparison after first amplifier amplification
The second voltage on road, the second sensor is input to the comparison circuit after second amplifier amplification.
9. Rouser according to claim 8, which is characterized in that the Rouser further includes the first impedance matching electricity
Road and the second impedance matching circuit, wherein first impedance matching circuit is connected to the first sensor and described first
Between amplifier, second impedance matching circuit is connected between the second sensor and second amplifier.
10. Rouser according to claim 9, which is characterized in that first impedance matching circuit and described second
Impedance matching circuit includes junction field effect transistor.
11. Rouser according to claim 9, which is characterized in that when the target sound signal is not wake-up signal
When, the switch module is electrically connected with first impedance matching circuit and second impedance matching circuit respectively, and institute
State the first impedance matching circuit and second impedance matching circuit conducting.
12. Rouser according to claim 7, which is characterized in that the back-end circuit includes analog to digital conversion circuit, institute
Analog to digital conversion circuit is stated to obtain the voltage of the first sensor and be converted to the first digital voltage signal.
13. Rouser according to claim 10, which is characterized in that the back-end circuit further includes third amplifier,
Wherein, the third amplifier is connected between the first sensor and analog-digital conversion circuit as described.
14. Rouser according to claim 13, which is characterized in that the back-end circuit further includes third impedance matching
Circuit, wherein the third impedance matching circuit is connected between the first sensor and the third amplifier, for adjusting
Save the output impedance of the first sensor.
15. Rouser according to claim 14, which is characterized in that when the target sound signal is wake-up signal
When, the switch module is electrically connected with the third impedance matching circuit, and the third impedance matching circuit is connected.
16. Rouser according to claim 12, which is characterized in that the back-end circuit includes sound processing chip,
Wherein, the sound processing chip receives first digital voltage signal and carries out keyword identification and matching.
17. Rouser according to claim 16, which is characterized in that the back-end circuit includes processor, when described
After Keywords matching success, the processor is triggered and wake-up.
18. Rouser according to claim 1, which is characterized in that the first sensor is directed toward the target sound
The sound source position of signal, the second sensor are directed toward external environment.
19. Rouser according to claim 18, which is characterized in that the sound source of the target sound signal includes people's
Oral cavity, loudspeaker, ultrasonic transducer.
20. Rouser according to claim 1, which is characterized in that the Rouser includes voice Rouser, language
Audio frequency range is 20Hz to 20kHz.
21. Rouser according to claim 20, which is characterized in that the voice Rouser includes microphone.
22. Rouser according to claim 1, which is characterized in that the Rouser includes ultrasonic Rouser, is surpassed
The frequency range of sound wave is greater than 20kHz.
23. Rouser according to claim 22, which is characterized in that the ultrasound Rouser includes that piezoelectric mems are super
Sonic transducer.
24. a kind of electronic equipment, which is characterized in that described in any item Rousers including the claims 1-23, institute
Rouser is stated to be set in the electronic equipment, it, will be described for after receiving the target sound signal of predetermined keyword
Electronic equipment is converted from listening mode to operating mode.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910515689.4A CN110248267A (en) | 2019-06-14 | 2019-06-14 | A kind of Rouser and electronic equipment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910515689.4A CN110248267A (en) | 2019-06-14 | 2019-06-14 | A kind of Rouser and electronic equipment |
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