CN110311639A - A kind of sound detection circuit, voice recognition circuit and electronic equipment - Google Patents
A kind of sound detection circuit, voice recognition circuit and electronic equipment Download PDFInfo
- Publication number
- CN110311639A CN110311639A CN201910568873.5A CN201910568873A CN110311639A CN 110311639 A CN110311639 A CN 110311639A CN 201910568873 A CN201910568873 A CN 201910568873A CN 110311639 A CN110311639 A CN 110311639A
- Authority
- CN
- China
- Prior art keywords
- circuit
- input terminal
- comparator
- signal
- connect
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000001514 detection method Methods 0.000 title claims abstract description 77
- 230000003750 conditioning effect Effects 0.000 claims description 24
- 230000003111 delayed effect Effects 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 10
- 230000008569 process Effects 0.000 claims description 9
- 238000007689 inspection Methods 0.000 claims 1
- 238000005516 engineering process Methods 0.000 abstract description 10
- 238000005070 sampling Methods 0.000 abstract description 4
- 239000003990 capacitor Substances 0.000 description 44
- 230000003321 amplification Effects 0.000 description 16
- 238000003199 nucleic acid amplification method Methods 0.000 description 16
- 238000010586 diagram Methods 0.000 description 9
- 230000005611 electricity Effects 0.000 description 7
- 238000012545 processing Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 230000005236 sound signal Effects 0.000 description 4
- 241000209094 Oryza Species 0.000 description 2
- 235000007164 Oryza sativa Nutrition 0.000 description 2
- 230000002441 reversible effect Effects 0.000 description 2
- 235000009566 rice Nutrition 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001574 biopsy Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H17/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves, not provided for in the preceding groups
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F13/00—Amplifiers using amplifying element consisting of two mechanically- or acoustically-coupled transducers, e.g. telephone-microphone amplifier
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/181—Low-frequency amplifiers, e.g. audio preamplifiers
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/68—Combinations of amplifiers, e.g. multi-channel amplifiers for stereophonics
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F2200/00—Indexing scheme relating to amplifiers
- H03F2200/03—Indexing scheme relating to amplifiers the amplifier being designed for audio applications
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Multimedia (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Circuit For Audible Band Transducer (AREA)
Abstract
The present embodiments relate to sound detection identification technology field, a kind of sound detection circuit, voice recognition circuit and electronic equipment are disclosed.After the sound detection circuit passes through sampled voice circuit sampling to voice signal, identifiable detection signal is stablized in output after amplifying circuit, signal delay circuit and comparison circuit, the detection signal can carry out voice recognition through voice recognition circuit, and described the embodiment of the invention provides a kind of reliable sound detection circuit, voice recognition circuit and electronic equipments.
Description
Technical field
The present invention relates to sound detection identification technology field, in particular to a kind of sound detection circuit, voice recognition circuit
And electronic equipment.
Background technique
Sound detection and identification are a kind of Activity recognition technologies, and sound detection and identification equipment constantly measure, note down quilt
The waveform that makes a sound of identification object and variation, by collection in worksite to sound carry out accurate with registered sound pattern
Match, so that it is determined that the sound that object issues.
In realizing process of the present invention, inventor's discovery is above, and at least there are the following problems in the related technology: the prior art
In, traditional sound detection is generally based on laser doppler and interference effect, and the electronics based on the production of these technologies is set
It is standby obtain the detection signal exported after voice signal it is very faint with it is of short duration, cause the Reliability comparotive of sound detection poor.
Summary of the invention
In view of the above drawbacks of the prior art, the object of the present invention is to provide a kind of reliable sound detection circuits, sound
Identification circuit and electronic equipment.
The purpose of the present invention is what is be achieved through the following technical solutions:
In order to solve the above technical problems, wrapping in a first aspect, provide a kind of sound detection circuit in the embodiment of the present invention
It includes:
Sampled voice circuit is used for sampled voice signal；
Amplifying circuit, and the sampled voice circuit connection, for amplifying the voice signal；
Signal delay circuit is connect with the amplifying circuit, is used for the amplified voice signal of delay process, is delayed
Signal；And
Comparison circuit is connect with the signal delay circuit, for producing according to the time delayed signal and preset reference signal
Biopsy surveys signal.
Optionally, the amplifying circuit includes:
First amplifying circuit amplifies the voice signal for level-one with the sampled voice circuit connection；With
Second amplifying circuit is connect with first amplifying circuit, amplifies the voice signal for second level.
Optionally, first amplifying circuit includes:
First comparator, the output end of the first comparator are connect with the input terminal of second amplifying circuit；
First reference voltage circuit, the input terminal of first reference voltage circuit is for inputting external power supply, and described the
The output end of one reference voltage circuit is connect with the non-inverting input terminal of the first comparator；And
First bleeder circuit, the input terminal of first bleeder circuit and the sampled voice circuit connection, described first
The output end of bleeder circuit is connect with the inverting input terminal of the first comparator.
Optionally, second amplifying circuit includes:
The output end of second comparator, second comparator is connect with the input terminal of the signal delay circuit；
Second reference voltage circuit, the input terminal of second reference voltage circuit is for inputting external power supply, and described the
The output end of two reference voltage circuits is connect with the non-inverting input terminal of second comparator；And
The input terminal of second bleeder circuit, second bleeder circuit is connect with the output end of the first comparator, institute
The output end for stating the second bleeder circuit is connect with the inverting input terminal of second comparator.
Optionally, the signal delay circuit includes:
Signal conditioning circuit, the input terminal of the signal conditioning circuit connect with the output end of the amplifying circuit, are used for
Improve amplified voice signal；
Delay comparison circuit, the input terminal of the delay comparison circuit are connect with the output end of the signal conditioning circuit,
The output end of the delay comparison circuit is connect with the input terminal of the comparison circuit, for the sound letter after delay process conditioning
Number.
Optionally, the signal conditioning circuit includes:
Rectification circuit, the input terminal of the rectification circuit are connect with the output end of the amplifying circuit；
Filter circuit, the input terminal of the filter circuit are connect with the output end of the rectification circuit, the filter circuit
Output end connect with the input terminal of the delay comparison circuit.
Optionally, the delay comparison circuit includes third comparator and charging circuit；
The input terminal of the charging circuit is for inputting external power supply, the output end of the charging circuit and the third ratio
Non-inverting input terminal compared with device connects, and the inverting input terminal of the third comparator and the output end of the signal conditioning circuit connect
It connects, the output end of the third comparator is connect with the input terminal of the comparison circuit.
Optionally, the comparison circuit includes:
4th comparator, the output end of the 4th comparator is for exporting the detection signal；
Third reference voltage circuit, the input terminal of the third reference voltage circuit is for inputting external power supply, and described the
The output end of three reference voltage circuits is connect with the non-inverting input terminal of the 4th comparator, and the reverse phase of the 4th comparator is defeated
Enter end to connect with the output end of the signal delay circuit.
In order to solve the above technical problems, second aspect, a kind of voice recognition circuit is provided in the embodiment of the present invention, is wrapped
It includes:
Sound detection circuit as described in above-mentioned first aspect；
Controller, the controller are connect with the output end of the comparison circuit in the sound detection circuit, are used for basis
The detection signal identifies sound.
In order to solve the above technical problems, the third aspect, a kind of electronic equipment is provided in the embodiment of the present invention, comprising:
Shell；
Voice recognition circuit as described in above-mentioned second aspect, the voice recognition circuit are installed on the shell.
Compared with prior art, the beneficial effects of the present invention are: being in contrast to the prior art, in the embodiment of the present invention
A kind of sound detection circuit, voice recognition circuit and electronic equipment are provided, the sound detection circuit passes through sampled voice electricity
After road samples faint and of short duration voice signal, amplifying circuit is first passed around by faint voice signal and carries out signal amplification,
So that the feature of voice signal becomes apparent, of short duration voice signal is then subjected to delay process by signal delay circuit,
In the period for extending voice signal, subsequent identification circuit/device is enabled to identify voice signal within longer cycle time
Feature, identifiable detection signal is stablized in output after finally rectifying after comparison circuit, and the embodiment of the invention provides one kind
Reliable sound detection circuit.
Detailed description of the invention
It is illustrated in one or more embodiments by the picture in corresponding attached drawing, these are exemplary
Illustrate not constitute the restriction to embodiment, the element/module and step in attached drawing with same reference numbers label are expressed as
Similar element/module and step, unless there are special statement, composition does not limit the figure in attached drawing.
Fig. 1 is a kind of structural schematic diagram of the sound detection circuit provided in the embodiment of the present invention one；
Fig. 2 is the structural schematic diagram of another sound detection circuit provided in the embodiment of the present invention one；
Fig. 3 is the structural schematic diagram of the first amplifying circuit and the second amplifying circuit described in Fig. 2；
Fig. 4 is the structural schematic diagram of another sound detection circuit provided in the embodiment of the present invention one；
Fig. 5 is the structural schematic diagram of signal conditioning circuit described in Fig. 4 and delay comparison circuit；
Fig. 6 is the structural schematic diagram of comparison circuit described in Fig. 1；
Fig. 7 is a kind of circuit connection diagram of the sound detection circuit provided in the embodiment of the present invention one；
Fig. 8 is a kind of structural schematic diagram of the voice recognition circuit provided in the embodiment of the present invention two；
Fig. 9 is the structural schematic diagram of a kind of electronic equipment provided in the embodiment of the present invention three.
Specific embodiment
The present invention is described in detail combined with specific embodiments below.Following embodiment will be helpful to the technology of this field
Personnel further understand the present invention, but the invention is not limited in any way.It should be pointed out that the ordinary skill of this field
For personnel, without departing from the inventive concept of the premise, various modifications and improvements can be made.These belong to the present invention
Protection scope.
It is with reference to the accompanying drawings and embodiments, right in order to which the objects, technical solutions and advantages of the application are more clearly understood
The application is further elaborated.It should be appreciated that specific embodiment described herein is only to explain the application, not
For limiting the application.
It should be noted that each feature in the embodiment of the present invention can be combined with each other, in this Shen if do not conflicted
Within protection scope please.In addition, though functional module division has been carried out in schematic device, but in some cases,
It can be divided with the module being different from device.
Unless otherwise defined, technical and scientific term all used in this specification is led with technology of the invention is belonged to
The normally understood meaning of the technical staff in domain is identical.Used term is only in the description of the invention in this specification
The purpose of description specific embodiment is not intended to the limitation present invention.Term "and/or" used in this specification includes
Any and all combinations of one or more related listed items.
Voice recognition is a kind of Activity recognition technology, and voice-recognition device constantly measures, notes down identified object sending
The waveform of sound and variation, by collection in worksite to sound accurately matched with registered sound pattern, so that it is determined that
The sound that object issues.In the prior art, traditional voice recognition technology is generally based on laser doppler and interference effect
It answers.In some special application environments, such as the puffed rice sound detection of micro-wave oven, if compared using this technical costs
Height, application is more complicated, so need a kind of low cost, simply can steady voice recognition circuit go to solve the problems, such as this.
Therefore, a kind of sound detection circuit, voice recognition circuit and electronic equipment are provided in the embodiment of the present invention, it is described
After voice recognition circuit passes through sampled voice circuit sampling to voice signal, by amplifying circuit, signal delay circuit and compare
Identifiable detection signal is stablized in output after circuit, and the embodiment of the invention provides a kind of reliable sound detection circuits.
Specifically, with reference to the accompanying drawing, the embodiment of the present invention is further elaborated.
Embodiment one
Referring to Figure 1, a kind of sound detection circuit 100 is provided in the embodiment of the present invention, comprising: sampled voice circuit
110, amplifying circuit 120, signal delay circuit 130 and comparison circuit 140.
The sampled voice circuit 110 is used for sampled voice signal.The sampled voice circuit 110 can be obtained by microphone
Extraneous sound is taken, and electric signal is converted for sound according to sound wave size, and then obtain the voice signal, the sound letter
Number be an electric signal.Specifically, the circuit of the sampled voice circuit 110 is constituted and connection type can carry out according to actual needs
Setting, does not need the restriction for sticking to the embodiment of the present invention.
The amplifying circuit 120 is connect with the sampled voice circuit 110, for amplifying the voice signal.It is described to put
The voice signal can be carried out power amplification by amplifier or amplification chip by big circuit 120, so that the voice signal
Signal characteristic become apparent, to amplified voice signal carry out waveforms detection when, available amplitude range is bigger
Voice signal waveform.Specifically, the circuit of the amplifying circuit 120 is constituted and connection type can carry out according to actual needs
Setting, does not need the restriction for sticking to the embodiment of the present invention.
The signal delay circuit 130 is connect with the amplifying circuit 120, for the amplified sound letter of delay process
Number, obtain time delayed signal.After voice signal after enhanced processing passes through the signal delay circuit 130, available certain frequency
The low and high level signal of rate, the signal are the time delayed signal.Specifically, the signal delay circuit 130 can will be of short duration
Period of voice signal carry out extension processing, the frequency of voice signal in cycle time is reduced, so that subsequent identification
Circuits/devices can identify the feature of voice signal within longer cycle time.The frequency can prolong according to the signal
When circuit 130 circuit constitute and reference voltage setting, the circuit of the signal delay circuit 130 is constituted and connection type can root
It is set according to actual needs, is not needed the restriction for sticking to the embodiment of the present invention.
The comparison circuit 140 is connect with the signal delay circuit 130, for according to the time delayed signal and default base
Calibration signal generates detection signal.The comparison circuit 140 after being rectified the time delayed signal for exporting, more to hold
Easily detect the detection signal.Specifically, the comparison circuit 140 circuit constitute and connection type can according to actual needs into
Row setting, does not need the restriction for sticking to the embodiment of the present invention.
A kind of sound detection circuit 100 is provided in the embodiment of the present invention, institute's sound detection circuit is adopted by sound
After sample circuit 110 samples faint and of short duration voice signal, first passes around amplifying circuit 120 and carry out faint voice signal
Signal amplification so that the feature of voice signal becomes apparent, then by signal delay circuit 130 by of short duration voice signal into
Line delay processing, extends the period of voice signal, subsequent identification circuit/device is identified within longer cycle time
The feature of voice signal, identifiable detection signal is stablized in output after finally rectifying after comparison circuit 140, and the present invention is implemented
Example provides a kind of reliable sound detection circuit 100.
In some embodiments, Fig. 2 is referred to, the amplifying circuit 120 includes: that the first amplifying circuit 121 and second are put
Big circuit 122.
First amplifying circuit 121 is connect with the sampled voice circuit 110, amplifies the sound letter for level-one
Number.Second amplifying circuit 122 is connect with first amplifying circuit 121, amplifies the voice signal for second level.It is described
The other end of second amplifying circuit 122 is connect with the signal delay circuit 130.
In embodiments of the present invention, the collected voice signal of the sampled voice circuit 110 is amplified by two-stage
Signal is amplified to object magnification by mode, can be by this kind of sound when such as puffed rice pops in such a way that two-stage is amplified
The variation of speech wave is smaller, the lesser voice signal of wave volume amplifies, so as to subsequent detection analysis.Specifically, described
The amplification factor of one amplifying circuit 121 and second amplifying circuit 122 depends on the selection of amplification chip and is connected to institute
State the selection of the resistive element of the bleeder circuit on amplification chip.First amplifying circuit 121 and second amplifying circuit
122 circuit is constituted and connection type can be set according to actual needs, does not need the restriction for sticking to the embodiment of the present invention.
In some embodiments, Fig. 3 is referred to, first amplifying circuit 121 includes: first comparator A1, the first base
Quasi- potential circuit 1211 and the first bleeder circuit 1212.Second amplifying circuit 122 includes: the second comparator A2, the second base
Quasi- potential circuit 1221 and the second bleeder circuit 1222.
The non-inverting input terminal of the first comparator A1 is connect with the output end of first reference voltage circuit 1211, institute
The inverting input terminal for stating first comparator A1 is connect with the output end of first bleeder circuit 1212, the first comparator A1
Output end connect with the input terminal of second amplifying circuit 122, i.e., the output end of the described first comparator A1 and described the
The input terminal of two bleeder circuits 1222 connects.The first comparator A1 is used for voice signal, i.e., a kind of analog voltage signal
It is compared with the first reference voltage signal, and then zooms in or out the voice signal, in embodiments of the present invention, described
One comparator A1 is for amplifying the voice signal.Specifically, the model that the first comparator A1 is used can be according to practical need
It is set, is not needed the restriction for sticking to the embodiment of the present invention.
The input terminal of first reference voltage circuit 1211 is for inputting external power supply VCC, first reference voltage
The output end of circuit 1211 is connect with the non-inverting input terminal of the first comparator A1.First reference voltage circuit 1211 is used
In providing first reference voltage signal for the first comparator A1, reach described in the voltage of the voice signal of input
After one reference voltage, the first comparator A1 exports high level.Specifically, the circuit of first reference voltage circuit 1211
Composition and connection type can be set according to actual needs, not need the restriction for sticking to the embodiment of the present invention.
The input terminal of first bleeder circuit 1212 is connect with the sampled voice circuit 110, the first partial pressure electricity
The output end on road 1212 is connect with the inverting input terminal of the first comparator A1.The output end of first bleeder circuit 1212
It is additionally coupled to the output end of the first comparator A1, first bleeder circuit 1212 is for controlling first amplifying circuit
121 amplification factor, the size of the amplification factor depend on the value of resistive element in first bleeder circuit 1212.Tool
Body, the circuit of first bleeder circuit 1212 constitutes and connection type can be set according to actual needs, does not need to arrest
Mud is in the restriction of the embodiment of the present invention.
The non-inverting input terminal of the second comparator A2 is connect with the output end of second reference voltage circuit 1221, institute
The inverting input terminal for stating the second comparator A2 is connect with the output end of second bleeder circuit 1222, the second comparator A2
Output end connect with the input terminal of the signal delay circuit 130.The second comparator A2 by described first for comparing
The amplified voice signal of device A1, is compared with the second reference voltage signal, and then is further amplified or reduces the sound
Signal, in embodiments of the present invention, the second comparator A2 amplify the voice signal for second level.Specifically, described
The model that two comparator A2 are used can be set according to actual needs, not need the restriction for sticking to the embodiment of the present invention.
The input terminal of second reference voltage circuit 1221 is for inputting external power supply VCC, second reference voltage
The output end of circuit 1221 is connect with the non-inverting input terminal of the second comparator A2.Second reference voltage circuit 1221 is used
In providing second reference voltage signal for the second comparator A2, reach described in the voltage of the voice signal of input
After two reference voltages, the second comparator A2 exports high level.Specifically, the electricity of second reference voltage circuit 12211
Road is constituted and connection type can be set according to actual needs, does not need the restriction for sticking to the embodiment of the present invention.
The input terminal of second bleeder circuit 1222 is connect with the output end of the first comparator A1, and described second point
The output end of volt circuit 1222 is connect with the inverting input terminal of the second comparator A2.Second bleeder circuit 1222 it is defeated
Outlet is additionally coupled to the output end of the second comparator A2, and second bleeder circuit 1222 is for controlling second amplification
The amplification factor of circuit 122, the size of the amplification factor depend on taking for resistive element in second bleeder circuit 1222
Value.Specifically, the circuit of second bleeder circuit 1222 is constituted and connection type can be set according to actual needs, is not required to
Stick to the restriction of the embodiment of the present invention.
In some embodiments, Fig. 4 is referred to, the signal delay circuit 130 includes: signal conditioning circuit 131 and prolongs
Slow comparison circuit 132.
The input terminal of the signal conditioning circuit 131 is connect with the output end of the amplifying circuit 120, the signal condition
The output end of circuit 131 is connect with the input terminal of the delay comparison circuit 132, and the signal conditioning circuit 131 is for improving
Amplified voice signal, to obtain stablizing the voice signal convenient for detection and identification.Specifically, the signal conditioning circuit
131 circuit is constituted and connection type can be set according to actual needs, does not need the restriction for sticking to the embodiment of the present invention.
The input terminal of the delay comparison circuit 132 is connect with the output end of the signal conditioning circuit 131, the delay
The output end of comparison circuit 132 is connect with the input terminal of the comparison circuit 140, for the sound letter after delay process conditioning
Number, to obtain the time delayed signal of certain frequency.In embodiments of the present invention, due to the amplifying circuit 120 and the comparison
All there is comparator in circuit 140, in the simulation that the input terminal of the amplifying circuit 120 and the comparison circuit 140 receives
Voltage reaches corresponding reference voltage and needs certain time, so that the signal for detection of final output has certain prolong
When, it is then desired to the frequency of the adjustment of the delay comparison circuit 132 detection signal be arranged, to obtain the detection letter of target frequency
Number.Specifically, the circuit of the delay comparison circuit 132 is constituted and connection type can be set according to actual needs, is not required to
Stick to the restriction of the embodiment of the present invention.
In some embodiments, Fig. 5 is referred to, the signal conditioning circuit 131 includes: rectification circuit 1311 and filtered electrical
Road 1312.The delay comparison circuit 132 includes: third comparator A3 and charging circuit 1321.
The input terminal of the rectification circuit 1311 is connect with the output end of the amplifying circuit 120, the rectification circuit
1311 output end is connect with the input terminal of the filter circuit.The rectification circuit 1311 is used for amplified voice signal
It is rectified, to export stable voice signal for detecting.Specifically, the circuit of the rectification circuit 1311 is constituted and is connected
Mode can be set according to actual needs, not need the restriction for sticking to the embodiment of the present invention.
The input terminal of the filter circuit 1312 is connect with the output end of the rectification circuit 1311, the filter circuit
1312 output end is connect with the input terminal of the delay comparison circuit 132, i.e., the output end of the described filter circuit 1312 and institute
State the inverting input terminal connection of third comparator A3.The filter circuit 1312 is miscellaneous in amplified voice signal for filtering out
Wave, to export stable voice signal for detecting.Specifically, the circuit of the filter circuit 1312 is constituted and connection type can
It is set according to actual needs, is not needed the restriction for sticking to the embodiment of the present invention.
The input terminal of the charging circuit 1321 is for inputting external power supply VCC, the output end of the charging circuit 1321
It is connect with the non-inverting input terminal of the third comparator A3, the charging circuit 1321 is for adjusting the delay comparison circuit
132 delay situation for adjusting the frequency of voice signal, and then adjusts the period of voice signal.In embodiments of the present invention,
The charging circuit 1321 is mainly reduced sound in cycle time by increasing the charging time and is believed by the setting charging time
Number frequency, increase the period of voice signal.Specifically, the circuit of the charging circuit 1321 is constituted and connection type can basis
Actual needs is set, and the restriction for sticking to the embodiment of the present invention is not needed.
The inverting input terminal of the third comparator A3 is connect with the output end of the signal conditioning circuit 131, i.e., described
The inverting input terminal of third comparator A3 is connect with the output end of the filter circuit 1312, the same phase of the third comparator A3
Input terminal is connect with the output end of the charging circuit 1321, the output end and the comparison circuit of the third comparator A3
140 input terminal connection.The third comparator A3 is for exporting the signal tune when the charging circuit 1321 is fully charged
Manage the voice signal that circuit 131 exports.Specifically, the model that the third comparator A3 is used can be set according to actual needs
It is fixed, do not need the restriction for sticking to the embodiment of the present invention.
In some embodiments, Fig. 6 is referred to, the comparison circuit 140 includes: third reference voltage circuit 141 and
Four comparator A4.
The input terminal of the third reference voltage circuit 141 is for inputting external power supply VCC, the third reference voltage electricity
The output end on road 141 is connect with the non-inverting input terminal of the 4th comparator A4.The third reference voltage circuit 141 is for being
The 4th comparator A4 provides the third reference voltage signal, reaches the third base in the voltage of the voice signal of input
After quasi- voltage, the 4th comparator A4 exports high level.Specifically, the circuit of the third reference voltage circuit 141 is constituted
It can be set according to actual needs with connection type, not need the restriction for sticking to the embodiment of the present invention.
The non-inverting input terminal of the 4th comparator A4 is connect with the output end of the third reference voltage circuit 141, institute
The inverting input terminal for stating the 4th comparator A4 is connect with the output end of the signal delay circuit 130, the 4th comparator A4
Output end for exporting the detection signal.The time delayed signal and the 4th base that the 4th comparator A4 is used to input
Quasi- voltage signal is compared, and the time delayed signal that will be above the 4th reference voltage rectifies out, is believed so as to subsequent detection
It number is detected.Specifically, the model that the 4th comparator A4 is used can be set according to actual needs, not need to adhere rigidly to
In the restriction of the embodiment of the present invention.
In some embodiments, Fig. 7, the particular circuit configurations and circuit connection of the sound detection circuit 100 are referred to
As shown with 7, please also refer to Fig. 1 to Fig. 6, specifically, in the sound detection circuit 100, there are following circuits structures for figure
And circuit connecting mode:
The sampled voice circuit 110 includes: microphone MIC, first resistor R1, second resistance R2 and first capacitor C1.Institute
The one end for stating the output end of microphone MIC connects with the first resistor R1, the second resistance R2 and the first capacitor C1 respectively
It connects, the other end ground connection of the output end of the microphone MIC；One end of the first resistor R1 is used for and the external power supply VCC
Connection, the other end of the first resistor R1 are connect with one end of the microphone MIC and the second resistance R2 respectively；Second electricity
One end of resistance R2 is connect with the other end of the microphone MIC and the first resistor R1 respectively, and the second resistance R2's is another
End ground connection；One end of the first capacitor C1 connects with the microphone MIC, the first resistor R1 and the second resistance R2 respectively
It connects, the other end of the first capacitor C1 is connect with the input terminal of the amplifying circuit 120.
The microphone MIC is for acquiring sound, and the external power supply VCC is through the first resistor R1 and the second resistance
It powers after R2 partial pressure to the microphone MIC, the first capacitor C1 is a coupled capacitor, defeated after the microphone MIC acquisition sound
Voice signal is coupled to the amplifying circuit 120 through the first capacitor C1 out.
Specifically, the model of the microphone MIC, the output voltage of the external power supply VCC and output power, described first
Model and its capacitance size, the model and its resistance value size of the first resistor R1 and the second resistance R2 of capacitor C1
It can be configured according to actual needs, not need the restriction for sticking to the embodiment of the present invention.
The amplifying circuit 120 includes: the first amplifying circuit 121, the second amplifying circuit 122 and third capacitor C3.Specifically
Ground, first amplifying circuit 121 include: first comparator A1, the first reference voltage circuit 1211, the first bleeder circuit
1212.Second amplifying circuit 122 includes: the second comparator A2, the second reference voltage circuit 1221 and the second bleeder circuit
1222.The third capacitor C3 be a coupled capacitor, voice signal through 121 level-one of the first amplifying circuit amplification after using
The third capacitor C3 is coupled to second amplifying circuit 122.
Wherein, first reference voltage circuit 1211 includes: 3rd resistor R3, the 4th resistance R4 and the second capacitor C2.
The one end the 3rd resistor R3 is connect with the external power supply VCC, and the other end of the 3rd resistor R3 is respectively with the described 4th
One end of resistance R4, the second capacitor C2 one end connected with the non-inverting input terminal of the first comparator A1；4th resistance
One end of R4 respectively with the other end of the 3rd resistor R3, one end of the second capacitor C2 and the first comparator A1
Non-inverting input terminal connection, the other end ground connection of the 4th resistance R4；One end of the second capacitor C2 respectively with the third
The other end of resistance R3, the 4th resistance R4 one end connected with the non-inverting input terminal of the first comparator A1, described
The other end of four resistance R4 is grounded.
The external power supply VCC is provided through the 3rd resistor R3 and the 4th resistance R4 for the first comparator A1
First reference voltage, the second capacitor C2 are filter capacitor, input the sound of the inverting input terminal of the first comparator A1
After the voltage of signal reaches first reference voltage, the first comparator A1 exports high level, the amplified sound of level-one
Sound signal, and second amplifying circuit is couple by the third capacitor C3 by the amplified voice signal of the level-one
122。
Specifically, the model of the first comparator A1, the model of the second capacitor C2 and the third capacitor C3 and
Its capacitance size, the model of the 3rd resistor R3 and the 4th resistance R4 and its resistance value size can be according to actual needs
It is configured, does not need the restriction for sticking to the embodiment of the present invention.
First bleeder circuit 1212 includes: the 5th resistance R5 and the 6th resistance R6.One end of the 5th resistance R5
Connect with the output end of the sampled voice circuit 110, the other end of the 5th resistance R5 respectively with the 6th resistance R6
One end connected with the inverting input terminal of the first comparator A1；One end of the 6th resistance R6 is electric with the described 5th respectively
Resistance R5 the other end connected with the inverting input terminal of the first comparator A1, the 6th resistance R6 it is another respectively with it is described
The output end of first comparator A1 is connected with one end of the third capacitor C3.
The amplification factor of first amplifying circuit 121 are as follows: 1+R6/R5, wherein the R6 is the 6th resistance R6's
Resistance value, the R5 are the resistance value of the 5th resistance R5.In embodiments of the present invention, by changing the 5th resistance R5
With wherein one or two resistance value of the 6th resistance R6, that is, the amplification factor of first amplifying circuit 121 can be changed.
Specifically, the model and its resistance value size of the 5th resistance R5 and the 6th resistance R6 can be according to practical need
It is configured, does not need the restriction for sticking to the embodiment of the present invention.
Second reference voltage circuit 1221 includes: the 7th resistance R7, the 8th resistance R8 and the 4th capacitor C4.Described
Seven one end resistance R7 are connect with the external power supply VCC, the other end of the 7th resistance R7 respectively with the 8th resistance R8
One end, the 4th capacitor C4 one end connected with the non-inverting input terminal of the second comparator A2；The one of the 8th resistance R8
The other end, one end of the 4th capacitor C4 and the non-inverting input terminal of the second comparator A2 at end and the 7th resistance R7
Connection, the other end ground connection of the 8th resistance R8；One end of the 4th capacitor C4 is another with the 7th resistance R7 respectively
One end, the 8th resistance R8 one end connected with the non-inverting input terminal of the second comparator A2, the 8th resistance R8's
Other end ground connection.
The external power supply VCC is provided through the 7th resistance R7 and the 8th resistance R8 for the second comparator A2
Second reference voltage, the 4th capacitor C4 are filter capacitor, input the sound of the inverting input terminal of the second comparator A2
After the voltage of signal reaches second reference voltage, the second comparator A2 exports high level, the amplified sound of second level
Sound signal.
Specifically, the model of the second comparator A2, the model of the 4th capacitor C4 and its capacitance size, described
The model and its resistance value size of 7th resistance R7 and the 8th resistance R8 can be configured according to actual needs, not need to arrest
Mud is in the restriction of the embodiment of the present invention.
Second bleeder circuit 1222 includes: the 9th resistance R9 and the tenth resistance R10.One end of the 9th resistance R9
Connect with the output end of the third capacitor C3, the other end of the 9th resistance R9 respectively with the tenth resistance R10 one
End is connected with the inverting input terminal of the second comparator A2；One end of the tenth resistance R10 respectively with the 9th resistance
The other end of R9 is connected with the inverting input terminal of the second comparator A2, the tenth resistance R10 it is another respectively with it is described
The output end of second comparator A2 and the input terminal (input terminal of the i.e. described rectification circuit 1311) of the signal delay circuit 130
Connection.
The amplification factor of second amplifying circuit 122 are as follows: 1+R10/R9, wherein the R10 is the tenth resistance
The resistance value of R10, the R9 are the resistance value of the 9th resistance R9.In embodiments of the present invention, by changing the described 9th
Wherein one or two resistance value of resistance R9 and the tenth resistance R10, that is, can be changed putting for second amplifying circuit 122
Big multiple.
Specifically, the model and its resistance value size of the 9th resistance R9 and the tenth resistance R10 can be according to reality
It needs to be configured, does not need the restriction for sticking to the embodiment of the present invention.
The signal delay circuit 130 includes: signal conditioning circuit 131 and delay comparison circuit 132.The signal condition
Circuit 131 includes: rectification circuit 1311 and filter circuit 1312.The delay comparison circuit 132 include: third comparator A3 with
Charging circuit 1321.
Wherein, the rectification circuit 1311 includes: first diode D1 and eleventh resistor R11.The first diode
The input terminal of D1 is connect, described first with the output end (output end of the i.e. described second comparator A2) of the amplifying circuit 120
The output end of diode D1 connects with the inverting input terminal of one end of the eleventh resistor R11 and the third comparator A3 respectively
It connects, the other end ground connection of the eleventh resistor R11.The filter circuit 1312 includes: the 5th capacitor C5.5th capacitor
C5 is connected in parallel on the both ends of the eleventh resistor R11, and the filter circuit 1312 is connected to the output of the rectification circuit 1311
Between end and the inverting input terminal of the third comparator A3.
The amplified voice signal of the amplifying circuit 120, via the first diode D1 and the eleventh resistor
The half-wave rectifying circuit that R11 is constituted is rectified, and is filtered using the filter circuit 1312 being made of the 5th capacitor C5
Wave, after eliminating some useless small-signals, the signal of output is directly inputted into the reverse phase of the third comparator A3 all the way
Input terminal, another way is by being input to the non-inverting input terminal of the third comparator A3 after the charging circuit 1321.
Specifically, the size of the model and its conducting voltage of the first diode D1, the eleventh resistor R11
Model and its resistance value size, the model of the 5th capacitor C5 and its capacitance size can be set according to actual needs
It sets, does not need the restriction for sticking to the embodiment of the present invention.
The charging circuit 1321 includes: twelfth resistor R12, thirteenth resistor R13 and the 6th capacitor C6.Described tenth
One end of two resistance R12 is connected to the output end (output end of the i.e. described filter circuit 1312) of the signal conditioning circuit 131,
The other end of the twelfth resistor R12 is connected to the non-inverting input terminal of the third comparator A3；The thirteenth resistor R13
One end is connect with the external power supply VCC, and the other end of the thirteenth resistor R13 is respectively at the twelfth resistor R12's
The other end, the third comparator A3 non-inverting input terminal connected with one end of the 6th capacitor C6；The 6th capacitor C6
One end respectively compared with the other end of the thirteenth resistor R13, the other end of the twelfth resistor R12 and the third
The non-inverting input terminal of device A3 connects, the other end ground connection of the 6th capacitor C6.
It is input to the third comparator A3's all the way by the two-way voice signal that the signal conditioning circuit 131 exports
Inverting input terminal, another way are input to the non-inverting input terminal of the third comparator A3 by the twelfth resistor R12.It is described
External power supply VCC is the 6th capacitor C6 charging by the thirteenth resistor R13, after fully charged, draws high the third
The level of the non-inverting input terminal of comparator A3, so that the voltage for inputting the third comparator A3 non-inverting input terminal reaches overturning
Value, so that third comparator A3 delay output voice signal, i.e., the described time delayed signal.In embodiments of the present invention,
The delay time of the delay comparison circuit 132 is by the resistance value of the twelfth resistor R12 and the electricity of the 6th capacitor C6
Capacitance determines together, by change state twelfth resistor R12 resistance value and the 6th capacitor C6 capacitance one of them
Or two, the delay time of the delay comparison circuit 132 can be changed.For example, the capacitor of the 6th capacitor C6 can be increased
Value, so that the charging time of the charging circuit 1321 lengthens, so that voice signal is entering the third comparator A3
Before accumulated, and then reduce cycle time in signal frequency, extend the period of the voice signal, reach the sound
The purpose of signal progress delay process.
Specifically, the model and its resistance value size of the twelfth resistor R12 and thirteenth resistor R13, the described 6th
The model and its capacitance size of capacitor C6 can be configured according to actual needs, not need the limit for sticking to the embodiment of the present invention
It is fixed.
The comparison circuit 140 includes: third reference voltage circuit 141, the 4th comparator A4 and the 14th resistance R14.
The third reference voltage circuit 141 includes: the 15th resistance R15 and the 16th resistance R16.The 14th resistance R14 mono-
End is connect with the output end of the third comparator A3, the other end and the 4th comparator A4 of the 14th resistance R14
Inverting input terminal connection；Described 15th one end resistance R15 is connect with the external power supply VCC, the 15th resistance R15
The other end connect respectively with the non-inverting input terminal of one end of the 16th resistance R16 and the 4th comparator A4；It is described
One end of 16th resistance R16 is same mutually defeated with the other end of the 15th resistance R15 and the 4th comparator A4 respectively
Enter end connection, the other end ground connection of the 16th resistance R16.
The external power supply VCC is the 4th comparator through the 15th resistance R15 and the 16th resistance R16
A4 provides the 4th reference voltage, the time delayed signal and the 4th reference voltage signal that the 4th comparator A4 is used to input
It is compared, the time delayed signal that will be above the 4th reference voltage rectifies out, to export detection signal.Described 14th
Resistance R14 is a current-limiting resistance, and the 14th resistance R14 is for preventing load from overloading, and the load is is input to described the
The time delayed signal of three comparator A3 output.
Specifically, the model of the 14th resistance R14, the 15th resistance R15 and the 16th resistance R16 and
Its resistance value size can be configured according to actual needs, not need the restriction for sticking to the embodiment of the present invention.
Embodiment two
Fig. 8 is referred to, a kind of voice recognition circuit 200 is provided in the embodiment of the present invention, comprising: such as above-described embodiment
Sound detection circuit 100 described in one；And controller 210, the controller 210 in the sound detection circuit 100
The output end of comparison circuit 140 connects, for identifying sound, judging the type of sound according to the detection signal.
It should be noted that being examined as sound detection circuit 100 in this present embodiment with sound described in embodiment one
Slowdown monitoring circuit 100 is based on identical inventive concept, and the voice recognition circuit 200 in the present embodiment includes sound described in embodiment one
Therefore whole features of detection circuit 100 are herein no longer described in detail the sound detection circuit 100.
At least need to be provided with a microprocessor or microcomputer with computing capability in the controller 210.
The microprocessor or microcomputer can be the multiple microprocessors with computing function being arranged in electronic equipment
Or microcomputer, it is also possible to the microprocessor or microcomputer that one is independently arranged, and the microprocessor or micro-
Type computer is respectively connected to the sound detection circuit 100, thus obtain detection signal and detection signal is identified, from
And the characteristic information of sound is obtained, further, identify the type of corresponding sound signal.The microprocessor or microcomputer
Function is calculated to be enough in setting various parameters, obtain various parameters, storage various parameters, receive various information, the various information of processing
And send various information and instruction.It is additionally provided with storage medium in the controller 210, which is stored with executable
Multiple instruction and program, the data processing for the controller 210.The controller 210 can be a small-sized list
Piece machine.In other some embodiments, microprocessor or the concrete model of microcomputer in the controller 210 etc.
The needs of data-handling capacity can be configured according to the practical controller 210, the specific electricity in the controller 210
Line structure can be configured according to actual needs, not need the restriction for sticking to the embodiment of the present invention.
A kind of voice recognition circuit is provided in the embodiment of the present invention, the voice recognition circuit passes through sound detection circuit
Identifiable detection signal is stablized in output after sampling voice signal, then identifies sound through the controller, and the present invention is implemented
Example provides a kind of reliable voice recognition circuit.
Embodiment three
Fig. 9 is referred to, a kind of electronic equipment 300 is provided in the embodiment of the present invention, comprising: shell 310；And such as
Voice recognition circuit 200 described in above-described embodiment two, the voice recognition circuit 200 are installed on the shell 310.
It should be noted that being known as voice recognition circuit 200 in this present embodiment with sound described in embodiment two
Other circuit 200 is based on identical inventive concept, and the voice recognition circuit 200 in the present embodiment includes sound described in embodiment two
Therefore whole features of identification circuit 200 are herein no longer described in detail the voice recognition circuit 200.
The shell 310 can be the shell 310 of electronic equipment 300 common in life, and the electronic equipment 300 has
The function of voice recognition.For example, the electronic equipment 300 can be micro-wave oven, the shell 310 can be the outer of micro-wave oven
Shell, the voice recognition circuit 200 can be the circuit structure being arranged on the microwave oven internal circuit board.The shell
310 can be used for protecting the voice recognition circuit 200.Specifically, the shell 310 is set according to the electronic equipment 300
It sets, does not need the restriction for sticking to the embodiment of the present invention.
A kind of electronic equipment is provided in the embodiment of the present invention, which can be known by the voice recognition circuit
Chan Sheng not be in the sound inside and outside the shell, the embodiment of the invention provides a kind of electronics being able to detect and identify voice signal
Equipment.
A kind of sound detection circuit, voice recognition circuit and electronic equipment, the sound are provided in the embodiment of the present invention
After detection circuit passes through sampled voice circuit sampling to voice signal, by amplifying circuit, signal delay circuit and comparison circuit
Identifiable detection signal is stablized in output afterwards, and the embodiment of the invention provides a kind of reliable sound detection circuits.
Finally, it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；At this
Under the thinking of invention, it can also be combined between the technical characteristic in above embodiments or different embodiments, and exist as above
Many other variations of the different aspect of the invention, for simplicity, they are not provided in details；Although referring to before
Stating embodiment, invention is explained in detail, those skilled in the art should understand that: it still can be to preceding
It states documented technical solution in each embodiment to modify, or wherein regional development and technology feature is equivalently replaced；And this
It modifies or replaces, the range of technical solution in various embodiments of the present invention that it does not separate the essence of the corresponding technical solution.
Claims (10)
1. a kind of sound detection circuit characterized by comprising
Sampled voice circuit is used for sampled voice signal；
Amplifying circuit, and the sampled voice circuit connection, for amplifying the voice signal；
Signal delay circuit is connect with the amplifying circuit, is used for the amplified voice signal of delay process, obtains delay letter
Number；And
Comparison circuit is connect with the signal delay circuit, for generating inspection according to the time delayed signal and preset reference signal
Survey signal.
2. sound detection circuit according to claim 1, which is characterized in that the amplifying circuit includes:
First amplifying circuit amplifies the voice signal for level-one with the sampled voice circuit connection；With
Second amplifying circuit is connect with first amplifying circuit, amplifies the voice signal for second level.
3. sound detection circuit according to claim 2, which is characterized in that first amplifying circuit includes:
First comparator, the output end of the first comparator are connect with the input terminal of second amplifying circuit；
First reference voltage circuit, the input terminal of first reference voltage circuit is for inputting external power supply, first base
The output end of quasi- potential circuit is connect with the non-inverting input terminal of the first comparator；And
First bleeder circuit, the input terminal of first bleeder circuit and the sampled voice circuit connection, first partial pressure
The output end of circuit is connect with the inverting input terminal of the first comparator.
4. sound detection circuit according to claim 3, which is characterized in that second amplifying circuit includes:
The output end of second comparator, second comparator is connect with the input terminal of the signal delay circuit；
Second reference voltage circuit, the input terminal of second reference voltage circuit is for inputting external power supply, second base
The output end of quasi- potential circuit is connect with the non-inverting input terminal of second comparator；And
The input terminal of second bleeder circuit, second bleeder circuit is connect with the output end of the first comparator, and described
The output end of two bleeder circuits is connect with the inverting input terminal of second comparator.
5. sound detection circuit according to any one of claims 1 to 4, which is characterized in that the signal delay circuit packet
It includes:
Signal conditioning circuit, the input terminal of the signal conditioning circuit is connect with the output end of the amplifying circuit, for improving
Amplified voice signal；
Delay comparison circuit, the input terminal of the delay comparison circuit is connect with the output end of the signal conditioning circuit, described
The output end of delay comparison circuit is connect with the input terminal of the comparison circuit, for the voice signal after delay process conditioning.
6. sound detection circuit according to claim 5, which is characterized in that the signal conditioning circuit includes:
Rectification circuit, the input terminal of the rectification circuit are connect with the output end of the amplifying circuit；
Filter circuit, the input terminal of the filter circuit are connect with the output end of the rectification circuit, the filter circuit it is defeated
Outlet is connect with the input terminal of the delay comparison circuit.
7. sound detection circuit according to claim 5, which is characterized in that
The delay comparison circuit includes third comparator and charging circuit；
The input terminal of the charging circuit is for inputting external power supply, the output end of the charging circuit and the third comparator
Non-inverting input terminal connection, the inverting input terminal of the third comparator connect with the output end of the signal conditioning circuit, institute
The output end for stating third comparator is connect with the input terminal of the comparison circuit.
8. sound detection circuit according to any one of claims 1 to 4, which is characterized in that the comparison circuit includes:
4th comparator, the output end of the 4th comparator is for exporting the detection signal；
Third reference voltage circuit, the input terminal of the third reference voltage circuit is for inputting external power supply, the third base
The output end of quasi- potential circuit is connect with the non-inverting input terminal of the 4th comparator, the inverting input terminal of the 4th comparator
It is connect with the output end of the signal delay circuit.
9. a kind of voice recognition circuit characterized by comprising
Sound detection circuit as claimed in any one of claims 1 to 8；
Controller, the controller are connect with the output end of the comparison circuit in the sound detection circuit, for according to
Signal is detected, identifies sound.
10. a kind of electronic equipment characterized by comprising
Shell；
Voice recognition circuit as claimed in claim 9, the voice recognition circuit are installed on the shell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910568873.5A CN110311639A (en) | 2019-06-27 | 2019-06-27 | A kind of sound detection circuit, voice recognition circuit and electronic equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910568873.5A CN110311639A (en) | 2019-06-27 | 2019-06-27 | A kind of sound detection circuit, voice recognition circuit and electronic equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110311639A true CN110311639A (en) | 2019-10-08 |
Family
ID=68076860
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910568873.5A Pending CN110311639A (en) | 2019-06-27 | 2019-06-27 | A kind of sound detection circuit, voice recognition circuit and electronic equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110311639A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203120140U (en) * | 2013-01-27 | 2013-08-07 | 慈溪迈思特电子科技有限公司 | Audio amplification circuit with standby function |
| CN103604493A (en) * | 2013-11-27 | 2014-02-26 | 东南大学 | Voice signal probing and alarming system |
| CN204721587U (en) * | 2015-05-21 | 2015-10-21 | 广东安居宝数码科技股份有限公司 | Voicefrequency circuit anomalous identification system |
| CN206341205U (en) * | 2016-08-30 | 2017-07-18 | 成都云之声科技有限公司 | Audio switches the pretreatment system of active and standby receiver when transmitting |
| CN107632288A (en) * | 2017-10-27 | 2018-01-26 | 无锡七百二十度科技有限公司 | A kind of sonic location system |
| CN206974543U (en) * | 2017-07-03 | 2018-02-06 | 中山友电电子有限公司 | A kind of noise test circuit |
| CN108195465A (en) * | 2017-12-12 | 2018-06-22 | 浙江大华技术股份有限公司 | A kind of detection device and method |
| CN109119055A (en) * | 2017-06-23 | 2019-01-01 | 广州胖达熊动漫科技有限公司 | A kind of acquisition processing system of the impact beat of impact musical instrument |
-
2019
- 2019-06-27 CN CN201910568873.5A patent/CN110311639A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203120140U (en) * | 2013-01-27 | 2013-08-07 | 慈溪迈思特电子科技有限公司 | Audio amplification circuit with standby function |
| CN103604493A (en) * | 2013-11-27 | 2014-02-26 | 东南大学 | Voice signal probing and alarming system |
| CN204721587U (en) * | 2015-05-21 | 2015-10-21 | 广东安居宝数码科技股份有限公司 | Voicefrequency circuit anomalous identification system |
| CN206341205U (en) * | 2016-08-30 | 2017-07-18 | 成都云之声科技有限公司 | Audio switches the pretreatment system of active and standby receiver when transmitting |
| CN109119055A (en) * | 2017-06-23 | 2019-01-01 | 广州胖达熊动漫科技有限公司 | A kind of acquisition processing system of the impact beat of impact musical instrument |
| CN206974543U (en) * | 2017-07-03 | 2018-02-06 | 中山友电电子有限公司 | A kind of noise test circuit |
| CN107632288A (en) * | 2017-10-27 | 2018-01-26 | 无锡七百二十度科技有限公司 | A kind of sonic location system |
| CN108195465A (en) * | 2017-12-12 | 2018-06-22 | 浙江大华技术股份有限公司 | A kind of detection device and method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN204613137U (en) | Air-anion concentration detector | |
| CN205002878U (en) | Wireless vibration sensor | |
| CN205229440U (en) | A detecting system for detecting partial discharge detector | |
| CN105823922B (en) | Hum bar electrical induction device | |
| CN205404670U (en) | Transmission line transient state current collection device | |
| CN100454028C (en) | Impedance measuring circuit, its method, and capacitance measuring circuit | |
| CN106802436B (en) | A kind of geophone tester and test method based on Goertzel transformation algorithm | |
| CN206224507U (en) | Finger print detection device | |
| CN108332845B (en) | Noise measuring method and acoustic meter | |
| CN108761368A (en) | Aeolian vibration for transmission line of electricity monitors calibration method | |
| CN110311639A (en) | A kind of sound detection circuit, voice recognition circuit and electronic equipment | |
| JP3469586B2 (en) | Impedance-voltage conversion device and conversion method | |
| CN106166329B (en) | Portable detector and method based on neuromuscular electric stimulation therapy instrument | |
| CN103091561A (en) | Device obtaining direct current signals from alternative current and direct current superposition signals and method thereof | |
| CN108490241A (en) | A kind of small signal high precision peak detection device of high bandwidth | |
| Waldi et al. | Rogowski coil sensor in the digitization process to detect partial discharge | |
| CN209102802U (en) | A kind of detection circuit and electric energy computation chip of tension measuring circuit parameter | |
| CN116952293A (en) | Application performance test method of PZT-based flexible piezoelectric sensor | |
| CN107024613A (en) | High-voltage feedback power cable square wave on-line overvoltage monitor | |
| CN110308329A (en) | High frequency sweep impedance ground specificity analysis instrument | |
| CN202710518U (en) | Watermelon ripeness detector | |
| CN211043525U (en) | Measuring instrument with phase sequence testing function | |
| CN211123004U (en) | Quick detection device of high-low voltage cabinet | |
| CN204649879U (en) | The intermittent pick-up unit of capacitor | |
| CN104407208B (en) | A kind of system of utilization circuit energy based on the relatively quasi- current in resistance property measurement of the positive inverse transformations of Fourier FFT |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20191008 |