CN212570391U - Voice awakening system - Google Patents
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- CN212570391U CN212570391U CN202020691196.4U CN202020691196U CN212570391U CN 212570391 U CN212570391 U CN 212570391U CN 202020691196 U CN202020691196 U CN 202020691196U CN 212570391 U CN212570391 U CN 212570391U
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Abstract
The utility model discloses a pronunciation system of awakening up, this system includes: the device comprises a signal extraction module, a signal amplification module, a voltage doubling rectification module, a voltage comparison module and a wake-up signal trigger module; the utility model discloses an input voltage signal to the microphone draws, enlargies, doubling and the rectification is handled to carry out the comparison with first mains voltage, when confirming that input voltage signal is greater than first mains voltage, produce wake-up signal, realize awakening up to intelligent terminal's pronunciation. The voice awakening system is suitable for various intelligent terminal devices, is simple in implementation mode, avoids development of a special chip and software debugging of a third-party control algorithm, and saves labor cost and time cost.
Description
Technical Field
The utility model relates to an intelligent terminal technique and voice control technical field especially relate to a pronunciation system of awakening up.
Background
With the continuous progress of scientific technology, the voice control technology is widely applied to intelligent terminal equipment as a new man-machine interaction mode, and the voice awakening function is more and more valued by people as an important branch of the voice control technology.
A smart terminal device (e.g., a smart phone) is in a standby state when not in use, and waking up by voice has become a common device waking means. In the prior art, a special chip needs to be developed for realizing the voice wake-up function, and meanwhile, a control algorithm (such as a neural network algorithm and a genetic algorithm) of a third party is combined for realizing the voice wake-up function.
However, the development of the dedicated chip needs to consume a lot of manpower and time, and has no universality, the implementation mode of the voice wake-up function is complex, the cost is high, and meanwhile, the software debugging time is too long by using a control algorithm of a third party.
SUMMERY OF THE UTILITY MODEL
The utility model provides a voice awakening system to awaken intelligent terminal equipment.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a voice wake-up system comprising: the device comprises a signal extraction module, a signal amplification module, a voltage doubling rectification module, a voltage comparison module and a wake-up signal trigger module;
the signal extraction module is connected with the signal amplification module and used for acquiring a first voltage signal of the microphone and transmitting the first voltage signal to the signal amplification module; the first voltage signal is obtained by converting a voice signal;
the signal amplification module is connected with the voltage-multiplying rectification module and used for amplifying the acquired first voltage signal to acquire a second voltage signal and transmitting the second voltage signal to the voltage-multiplying rectification module;
the voltage-multiplying rectification module is connected with the voltage comparison module and used for carrying out voltage-multiplying and rectification processing on the obtained second voltage signal so as to obtain a third voltage signal and transmitting the third voltage signal to the voltage comparison module;
the voltage comparison module is used for comparing the voltage values of the third voltage signal and the first power voltage and transmitting a high-level voltage signal or a low-level voltage signal to the wake-up signal trigger module according to a comparison result;
and the wake-up signal triggering module is used for generating a wake-up signal when acquiring the high-level voltage signal transmitted by the voltage comparison module.
The signal amplification module comprises a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, a fifth capacitor, a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor and a first operational amplifier;
the first end of the first capacitor and the first end of the second capacitor are connected with the signal extraction module, the second end of the first capacitor is connected with the ground, and the second end of the second capacitor is connected with the first end of the first resistor;
the second end of the first resistor, the first end of the fifth resistor and the first end of the fifth capacitor are connected with the inverting input end of the first operational amplifier;
the second end of the fifth resistor, the second end of the fifth capacitor and the first end of the sixth resistor are connected with the output end of the first operational amplifier, and the output end of the first operational amplifier is connected with the voltage-multiplying rectifying module;
the first end of the fourth resistor, the first end of the fourth capacitor and the second end of the sixth resistor are connected with a first power supply voltage, the second end of the fourth resistor is connected with the first end of the third capacitor, the first end of the second resistor and the first end of the third resistor, the second end of the third capacitor and the second end of the second resistor are connected with the ground, the second end of the third resistor is connected with the positive input end of the first operational amplifier, and the second end of the fourth resistor is connected with the ground.
The voltage-multiplying rectification module comprises a sixth capacitor, a first diode, a second diode, a seventh capacitor and an eighth capacitor;
the first end of the sixth capacitor is connected with the signal amplification module, and the second end of the sixth capacitor is connected with the first end of the first diode and the first end of the second diode;
the second end of the first diode is connected with the ground, and the second end of the second diode is connected with the first end of the seventh capacitor and the first end of the eighth capacitor;
the second end of the seventh capacitor and the second end of the eighth capacitor are connected to ground.
The voltage comparison module comprises a seventh resistor, an eighth resistor, a ninth resistor and a second operational amplifier;
the positive input end of the second operational amplifier is connected with the first end of the ninth resistor and the voltage-multiplying rectifying module, the second end of the ninth resistor is connected with the ground, and the output end of the second operational amplifier is connected with the awakening signal triggering module;
the first end of the seventh resistor and the first end of the eighth resistor are connected with the inverting input end of the second operational amplifier, the second end of the seventh resistor is connected with the ground, and the second end of the eighth resistor is connected with the first power supply voltage;
if the third voltage signal is greater than the first power supply voltage, the voltage comparison module transmits a high-level voltage signal to the wake-up signal trigger module, and if the third voltage signal is less than or equal to the first power supply voltage, the voltage comparison module transmits a low-level voltage signal to the wake-up signal trigger module.
The wake-up signal triggering module comprises a tenth resistor, an eleventh resistor, a twelfth resistor, a triode and a power supply detection unit;
the first end of the tenth resistor and the first end of the eleventh resistor are connected with the voltage comparison module, the second end of the tenth resistor is connected with the ground, the second end of the eleventh resistor is connected with the first end of the triode, and the second end of the triode is connected with the ground;
the first end of the twelfth resistor and the power detection unit are connected with the third end of the triode, and the second end of the twelfth resistor is connected with the second power voltage.
The signal amplification module and the voltage comparison module share one LM358 operational amplifier.
The voltage amplification factor of the signal amplification module is the ratio of the fifth resistor to the first resistor.
The first diode and/or the second diode comprise schottky diodes.
The transistor comprises an NPN transistor.
The wake-up signal triggering module is connected with the signal extraction module and used for sending a disconnection instruction to the signal extraction module when a wake-up signal is generated so as to disconnect the signal extraction module from the microphone or disconnect the signal extraction module from the first power supply voltage.
The utility model discloses a voltage signal to the microphone draws, enlarge, voltage doubling and rectification are handled, and compare with first mains voltage, when the voltage signal of confirming the microphone is greater than first mains voltage, produce wake-up signal, realized awakening up to intelligent terminal's pronunciation, and this pronunciation wake-up system is applicable to various intelligent terminal, and the implementation is simple, the development to special chip and the software debugging of third party control algorithm have been avoided, very big human cost and time cost have been saved.
Drawings
Fig. 1 is a block diagram of a voice wake-up system provided by the present invention;
fig. 2 is a circuit structure diagram of the signal amplification module provided by the present invention;
fig. 3 is a circuit structure diagram of the voltage-doubling rectifying module provided by the present invention;
fig. 4 is a circuit structure diagram of the voltage comparison module provided by the present invention;
fig. 5 is a circuit structure diagram of the wake-up signal triggering module provided by the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
Fig. 1 is a block diagram of a voice wake-up system provided by the present invention, the system includes: the device comprises a signal extraction module 100, a signal amplification module 200, a voltage doubling rectification module 300, a voltage comparison module 400 and a wake-up signal triggering module 500.
The signal extraction module 100 is connected to the signal amplification module 200, and is configured to acquire a first voltage signal of the microphone and transmit the first voltage signal to the signal amplification module 200; wherein, the first voltage signal is obtained by voice signal conversion. When the microphone acquires a voice signal, the capacitance of the capacitor changes due to vibration of the metal diaphragm, and then the voltage changes, and the signal extraction module 100 is connected to the microphone and can acquire a first voltage signal of the microphone. In particular, a smart terminal (e.g., a smart phone) generally includes two microphones, i.e., a main microphone and a sub-microphone, where the main microphone is used to collect voice information, and the sub-microphone is used to collect environmental noise, and then performs sound inversion processing through a Digital Signal Processing (DSP) function inside the smart terminal to achieve a noise suppression effect. The signal extraction module 100 is connected to the main microphone, and is configured to obtain a voltage signal of the main microphone; in the present invention, it is optional, and the type of the microphone is not particularly limited.
The signal amplification module 200 is connected to the voltage-doubling rectifying module 300, and is configured to amplify the acquired first voltage signal to acquire a second voltage signal, and transmit the second voltage signal to the voltage-doubling rectifying module 300. The voltage signal acquired by the microphone is weak, and a large error exists when the voltage value is directly acquired, so that the voltage signal of the microphone needs to be amplified by the signal amplification module 200, and the actual voltage value can be determined according to the amplification factor of the signal amplification module 200 and the amplified voltage value.
Optionally, as shown in fig. 2, the signal amplifying module 200 includes a first capacitor C1, a second capacitor C2, a third capacitor C3, a fourth capacitor C4, a fifth capacitor C5, a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, and a first operational amplifier V1;
a first end of the first capacitor C1 and a first end of the second capacitor C2 are connected to the signal extraction module 100, a second end of the first capacitor C1 is connected to ground, and a second end of the second capacitor C2 is connected to a first end of the first resistor R1;
the second end of the first resistor R1, the first end of the fifth resistor R5 and the first end of the fifth capacitor C5 are connected to the inverting input terminal (i.e., the negative pole) of the first operational amplifier V1;
the second end of the fifth resistor R5, the second end of the fifth capacitor C5 and the first end of the sixth resistor R6 are connected with the output end of the first operational amplifier V1, and the output end of the first operational amplifier V1 is connected with the voltage-doubling rectifying module 300;
a first end of a fourth resistor R4, a first end of a fourth capacitor C4 and a second end of a sixth resistor R6 are connected with a first power supply voltage U1, a second end of the fourth resistor R4 is connected with a first end of a third capacitor C3, a first end of a second resistor R2 and a first end of a third resistor R3, a second end of the third capacitor C3 and a second end of a second resistor R2 are connected with the ground, a second end of the third resistor R3 is connected with a positive input end (namely a positive electrode) of a first operational amplifier V1, and a second end of the fourth capacitor C4 is connected with the ground; the first power voltage U1 supplies power to the signal amplification module 200, and the first power voltage U1 may be a working voltage of 3.3V.
The voltage amplification factor of the signal amplification module 200 is the ratio of the fifth resistor R5 to the first resistor R1, and the voltage amplification factor of the signal amplification module 200 can be adjusted by setting the values of the fifth resistor R5 and the first resistor R1, in the present invention, the voltage amplification factor of the signal amplification module 200 is not specifically limited.
The voltage-doubling rectifying module 300 is connected to the voltage comparing module 400, and configured to perform voltage-doubling and rectifying processing on the acquired second voltage signal to acquire a third voltage signal, and transmit the third voltage signal to the voltage comparing module 400. The voltage doubling rectification is to convert a low-value alternating voltage into a high-value direct voltage, and can be divided into a voltage doubling stage, a voltage tripling stage and a voltage multi-stage according to the ratio of an output voltage to an input voltage. The present invention is not limited to the voltage-multiplying value of the voltage-multiplying rectifier module 300.
Optionally, as shown in fig. 3, the voltage-doubler rectifier module 300 includes a sixth capacitor C6, a first diode D1, a second diode D2, a seventh capacitor C7, and an eighth capacitor C8;
a first end of the sixth capacitor C6 is connected to the signal amplification module 200, and a second end is connected to the first end of the first diode D1 and the first end of the second diode D2;
a second terminal of the first diode D1 is connected to ground, and a second terminal of the second diode D2 is connected to a first terminal of the seventh capacitor C7 and a first terminal of the eighth capacitor C8;
a second terminal of the seventh capacitor C7 and a second terminal of the eighth capacitor C8 are connected to ground.
Optionally, the first Diode and/or the second Diode comprises a Schottky Barrier Diode (SBD); the schottky diode has the characteristics of high switching frequency and low forward voltage drop, the forward voltage drop of the schottky diode is only half of that of a traditional silicon diode, meanwhile, the reverse phase input recovery time is short, and the schottky diode is particularly suitable for protecting a reverse amplification circuit in the signal amplification module 200.
The voltage comparison module 400 compares the voltage values of the third voltage signal and the first power voltage, and transmits a high-level voltage signal or a low-level voltage signal to the wake-up signal triggering module 500 according to the comparison result.
As shown in fig. 4, the voltage comparison module 400 includes a seventh resistor R7, an eighth resistor R8, a ninth resistor R9, and a second operational amplifier V2;
the positive input end of the second operational amplifier V2 is connected to the first end of the ninth resistor R9 and the voltage-doubling rectifying module 300, the second end of the ninth resistor R9 is connected to ground, and the output end of the second operational amplifier V2 is connected to the wake-up signal triggering module 500;
a first end of the seventh resistor R7 and a first end of the eighth resistor R8 are connected to the inverting input terminal of the second operational amplifier V2, a second end of the seventh resistor R7 is connected to ground, and a second end of the eighth resistor R8 is connected to the first power voltage U1; the first power voltage U1 supplies power to the voltage comparison module 400, and may also provide a reference voltage for the voltage comparison module 400 to be compared with the input voltage obtained through the microphone. If the third voltage signal is greater than the first power voltage, the voltage comparison module 400 transmits a high level voltage signal to the wake-up signal trigger module 500; if the third voltage signal is less than or equal to the first power voltage, the voltage comparison module 400 transmits a low level voltage signal to the wake-up signal triggering module 500.
Optionally, the signal amplifying module 200 and the voltage comparing module 400 share one LM358 operational amplifier. LM358 is a dual operational amplifier with high gain and low power consumption, and includes two independent operational amplifiers therein. Therefore, the two operational amplifiers in the LM358 are respectively used as the voltage signal amplifying device (i.e., the first operational amplifier V1) in the signal amplifying module 200 and the voltage value comparing device (i.e., the second operational amplifier V2) in the voltage comparing module 400.
The wake-up signal triggering module 500 is configured to generate a wake-up signal when acquiring the high-level voltage signal transmitted by the voltage comparing module 400.
As shown in fig. 5, the wake-up signal triggering module 500 includes a tenth resistor R10, an eleventh resistor R11, a twelfth resistor R12, a transistor Q1, and a power detection unit.
A first end of the tenth resistor R10 and a first end of the eleventh resistor R11 are connected to the voltage comparison module 400, a second end of the tenth resistor R10 is connected to ground, a second end of the eleventh resistor R11 is connected to a first end of the transistor Q1, and a second end of the transistor Q1 is connected to ground;
the first end of the twelfth resistor R12 and the power detection unit are connected to the third end of the transistor Q1, and the second end of the twelfth resistor R12 is connected to the second power voltage U2.
The triode Q1 comprises an NPN type triode, has the characteristics of long service life, high switching speed, small size and the like, and is suitable for being used as an on-off switch. The second power voltage U2 provides a power signal for the power detection unit, and the second power voltage U2 may be an operating voltage of 1.8V.
Specifically, when the microphone does not acquire the voice information, the input voltage (i.e., the third voltage signal) at the positive input end of the second operational amplifier V2 in the voltage comparison module 400 is less than or equal to the input voltage at the negative input end of the second operational amplifier, at this time, the voltage comparison module 400 outputs a low level voltage, the transistor Q1 is in a non-conducting state, the power supply detection unit may acquire the power supply signal provided by the second power supply voltage U2, and at this time, the power supply detection unit does not generate the wake-up signal. When the microphone acquires voice information, the input voltage (i.e., the third voltage signal) of the positive input end of the second operational amplifier V2 in the voltage comparison module 400 is greater than the input voltage of the negative input end of the second operational amplifier, at this time, the voltage comparison module 400 outputs a high level voltage, the transistor Q1 is in a conducting state, the second power supply voltage U2 is grounded through the twelfth resistor R12, at this time, the power supply detection unit cannot acquire the power supply signal provided by the second power supply voltage U2, which is equivalent to the power supply detection unit receiving the interrupt trigger signal, at this time, the power supply detection unit generates a wake-up signal, and sends the wake-up signal to the intelligent terminal device to wake up the intelligent terminal device.
In particular, the wake-up signal triggering module 500 is connected to the signal extraction module 100, and is configured to send a disconnection instruction to the signal extraction module 100 when the wake-up signal is generated, so as to disconnect the signal extraction module 100 from the microphone or disconnect the signal extraction module 100 from the first power voltage U1. When the intelligent terminal is awakened, the first voltage signal of the microphone does not need to be extracted, at this time, the connection between the signal extraction module 100 and the microphone is disconnected, or the connection between the signal extraction module 100 and the first power voltage U1 is disconnected, so that the consumption of the first power voltage can be saved, and the influence on the access signal of the microphone is prevented.
The utility model discloses a voltage signal to the microphone draws, enlarge, voltage doubling and rectification are handled, and compare with first mains voltage, when the voltage signal of confirming the microphone is greater than first mains voltage, produce wake-up signal, realized awakening up to intelligent terminal's pronunciation, and this pronunciation wake-up system is applicable to various intelligent terminal, and the implementation is simple, the development to special chip and the software debugging of third party control algorithm have been avoided, very big human cost and time cost have been saved.
It should be noted that the foregoing is only a preferred embodiment of the present invention and the technical principles applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail with reference to the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the scope of the present invention.
Claims (10)
1. A voice wake-up system, comprising: the device comprises a signal extraction module, a signal amplification module, a voltage doubling rectification module, a voltage comparison module and a wake-up signal trigger module;
the signal extraction module is connected with the signal amplification module and used for acquiring a first voltage signal of a microphone and transmitting the first voltage signal to the signal amplification module; the first voltage signal is obtained by converting a voice signal;
the signal amplification module is connected with the voltage-multiplying rectification module and used for amplifying the acquired first voltage signal to acquire a second voltage signal and transmitting the second voltage signal to the voltage-multiplying rectification module;
the voltage-multiplying rectification module is connected with the voltage comparison module and is used for carrying out voltage-multiplying and rectification processing on the obtained second voltage signal so as to obtain a third voltage signal and transmitting the third voltage signal to the voltage comparison module;
the voltage comparison module compares the voltage values of the third voltage signal and the first power voltage and transmits a high-level voltage signal or a low-level voltage signal to the wake-up signal trigger module according to a comparison result;
and the wake-up signal triggering module is used for generating a wake-up signal when acquiring the high-level voltage signal transmitted by the voltage comparison module.
2. The voice wake-up system according to claim 1, wherein the signal amplification module comprises a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, a fifth capacitor, a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor and a first operational amplifier;
the first end of the first capacitor and the first end of the second capacitor are connected with the signal extraction module, the second end of the first capacitor is connected with the ground, and the second end of the second capacitor is connected with the first end of the first resistor;
the second end of the first resistor, the first end of the fifth resistor and the first end of the fifth capacitor are connected with the inverting input end of the first operational amplifier;
the second end of the fifth resistor, the second end of the fifth capacitor and the first end of the sixth resistor are connected with the output end of the first operational amplifier, and the output end of the first operational amplifier is connected with the voltage-multiplying rectifying module;
the first end of the fourth resistor, the first end of the fourth capacitor and the second end of the sixth resistor are connected with a first power supply voltage, the second end of the fourth resistor is connected with the first end of the third capacitor, the first end of the second resistor and the first end of the third resistor, the second end of the third capacitor and the second end of the second resistor are connected with the ground, the second end of the third resistor is connected with the forward input end of the first operational amplifier, and the second end of the fourth capacitor is connected with the ground.
3. The voice wake-up system according to claim 1, wherein the voltage-doubling rectifying module comprises a sixth capacitor, a first diode, a second diode, a seventh capacitor and an eighth capacitor;
a first end of the sixth capacitor is connected with the signal amplification module, and a second end of the sixth capacitor is connected with a first end of the first diode and a first end of the second diode;
a second end of the first diode is connected to the ground, and a second end of the second diode is connected to a first end of the seventh capacitor and a first end of the eighth capacitor;
a second terminal of the seventh capacitor and a second terminal of the eighth capacitor are connected to ground.
4. The voice wake-up system according to claim 1, wherein the voltage comparison module comprises a seventh resistor, an eighth resistor, a ninth resistor and a second operational amplifier;
the positive input end of the second operational amplifier is connected with the first end of the ninth resistor and the voltage-multiplying rectifying module, the second end of the ninth resistor is connected with the ground, and the output end of the second operational amplifier is connected with the wake-up signal triggering module;
a first end of the seventh resistor and a first end of the eighth resistor are connected with an inverting input end of the second operational amplifier, a second end of the seventh resistor is connected with the ground, and a second end of the eighth resistor is connected with a first power supply voltage;
if the third voltage signal is greater than the first power voltage, the voltage comparison module transmits a high-level voltage signal to the wake-up signal trigger module, and if the third voltage signal is less than or equal to the first power voltage, the voltage comparison module transmits a low-level voltage signal to the wake-up signal trigger module.
5. The voice wake-up system according to claim 1, wherein the wake-up signal triggering module comprises a tenth resistor, an eleventh resistor, a twelfth resistor, a triode and a power detection unit;
a first end of the tenth resistor and a first end of the eleventh resistor are connected to the voltage comparison module, a second end of the tenth resistor is connected to ground, a second end of the eleventh resistor is connected to the first end of the triode, and a second end of the triode is connected to ground;
the first end of the twelfth resistor and the power supply detection unit are connected with the third end of the triode, and the second end of the twelfth resistor is connected with a second power supply voltage.
6. The voice wake-up system according to claim 2 or 4, wherein the signal amplifying module and the voltage comparing module share one LM358 operational amplifier.
7. The voice wake-up system according to claim 2, wherein the voltage amplification factor of the signal amplification module is a ratio of the fifth resistor to the first resistor.
8. The voice wake-up system according to claim 3, characterized in that the first diode and/or the second diode comprises a schottky diode.
9. The voice wake-up system according to claim 5, wherein the transistor comprises an NPN transistor.
10. The voice wake-up system according to claim 1, wherein the wake-up signal triggering module is connected to the signal extraction module, and configured to send a disconnection instruction to the signal extraction module when the wake-up signal is generated, so as to disconnect the signal extraction module from the microphone or disconnect the signal extraction module from the first power voltage.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020691196.4U CN212570391U (en) | 2020-04-29 | 2020-04-29 | Voice awakening system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020691196.4U CN212570391U (en) | 2020-04-29 | 2020-04-29 | Voice awakening system |
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| CN212570391U true CN212570391U (en) | 2021-02-19 |
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