CN206726303U - A kind of vehicle-mounted intelligent monitoring system based on sound bearing identification - Google Patents
A kind of vehicle-mounted intelligent monitoring system based on sound bearing identification Download PDFInfo
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- CN206726303U CN206726303U CN201720314617.XU CN201720314617U CN206726303U CN 206726303 U CN206726303 U CN 206726303U CN 201720314617 U CN201720314617 U CN 201720314617U CN 206726303 U CN206726303 U CN 206726303U
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Abstract
The utility model discloses a kind of vehicle-mounted intelligent monitoring system based on sound bearing identification, is mainly made up of sound acquisition modules more than 2 tunnels, wireless transport module, microprocessor, motor drive module, steering motor and camera；Include voice recognition circuit and sound amplitude detection circuit per road sound acquisition module；The output end of wherein voice recognition circuit is directly connected to an input of microprocessor；Magnitude of sound detects another input that circuit connects microprocessor via wireless transport module；One output end of microprocessor connects steering motor via motor drive module；Camera is arranged in steering motor；The shooting of another output end connection camera of microprocessor starts control terminal.The utility model can be in the case of the unmanned guard of parking, Intelligent Recognition intensity of sound and orientation, and targetedly power-on is monitored recording, so as to save energy resource consumption and data space.
Description
Technical field
It the utility model is related to vehicle-mounted monitoring technical field, and in particular to a kind of vehicle intelligent based on sound bearing identification
Monitoring system.
Background technology
Drive recorder is the instrument of the relevent informations such as the video in registration of vehicle traveling way.After drive recorder is installed,
The video image and sound of running car overall process are able to record, evidence can be provided for traffic accident.In recent years, drive recorder
The vehicle mounted electrical apparatus that vehicle must match somebody with somebody is become.Drive recorder producer also conforms to trend, constantly releases New function to improve car
Real-time monitoring and control, wherein the most commonly used function be by drive recorder make parking monitoring be used.By drive recorder
It is used as parking monitoring, is able to record video of the automobile during switch-off, evidence is provided for liability accident.
However, drive recorder wants to use, it is necessary to solve following two problems when parking：
It is power issue first.Because drive recorder is not grown from the stand-by time of charged pool, therefore, generally
Automobile Data Recorder is operated by automobile power, and recorder works and will stopped after automobile flameout.Although by vapour
Car itself battery power can after automobile flameout for drive recorder carry out continued power, if but automobile flameout time it is longer
When, the electricity that will also result in storage battery exhausts so that automobile can not light a fire startup.
Next to that the problem of memory space.If the video that drive recorder is taken all saves, even
The compress technique of video is ripe again, a last added together and astronomical figure.Therefore, generally Automobile Data Recorder is all
By the way of loop recording, i.e., when Automobile Data Recorder memory space soon completely when, recorder is automatically deleted the time and most leaned on
Preceding one section, to store the video newly recorded, such car owner can only actually view the video of nearest a period of time, if accident
Occur before the long period, then can not check, so as to lose the effect of parking monitoring.
Utility model content
Technical problem to be solved in the utility model is that current drive recorder carries out parking monitoring in real time after a stoppage
Appeared in power consumption and consumption memory space the problem of, there is provided it is a kind of based on sound bearing identification vehicle-mounted intelligent monitoring system.
To solve the above problems, the utility model is achieved through the following technical solutions：
A kind of vehicle-mounted intelligent monitoring system based on sound bearing identification, mainly by sound acquisition modules more than 2 tunnels, nothing
Line transport module, microprocessor, motor drive module, steering motor and camera composition；Include sound per road sound acquisition module
Sound identification circuit and sound amplitude detection circuit；The output end of wherein voice recognition circuit be directly connected to microprocessor one is defeated
Enter end；Magnitude of sound detects another input that circuit connects microprocessor via wireless transport module；The one of microprocessor
Individual output end connects steering motor via motor drive module；Camera is arranged in steering motor；Microprocessor another
The shooting of output end connection camera starts control terminal.
In such scheme, voice recognition circuit includes microphone MIC, triode T1, comparator U1, LED diode D1, electricity
Hinder R1-R6, variable resistor R7 and electric capacity C1-C4；After resistance R6 and electric capacity C3 is in parallel, microphone MIC both ends are attempted by；
Microphone MIC one end connects resistance R1 one end and electric capacity C2 one end simultaneously；The electric capacity C2 other end simultaneously resistance R2
One end and triode T1 base stage；Triode T1 colelctor electrode connects resistance R3 one end, electric capacity C4 one end and compared simultaneously
Device U1 inverting input；Electric capacity C1 one end and resistance R1-R3 another termination supply voltage VDD；The electric capacity C1 other end,
The other end ground connection GND of the microphone MIC other end, triode T1 emitter stage and electric capacity C4；A variable resistor R7 termination
Supply voltage VDD, variable resistor the R7 other end ground connection GND, variable resistor R7 control termination comparator U1 homophase input
End；Resistance R4 termination comparator U1 output end, another termination supply voltage VDD；Resistance R5 one end and LED diodes
D1 negative electrode connection, resistance R5 another termination comparator U1 output end, LED diodes D1 anode meet supply voltage VDD；
Comparator U1 output end forms the output end of voice recognition circuit.
In such scheme, magnitude of sound detection circuit includes microphone MIC, operational amplifier U2, diode D2, resistance
R8-R14, variable resistor R15 and electric capacity C5-C7；Resistance R8 one end connection microphone MIC one end, microphone MIC's is another
One end is grounded GND；The resistance R8 other end connects diode D2 anode and resistance R10 one end simultaneously；Diode D2 the moon
Pole connects one end of electric capacity C5 one end, resistance R11 one end and resistance R9 simultaneously；The resistance R9 other end connects electric capacity simultaneously
The in-phase input end of C6 one end, resistance R12 one end and operational amplifier U2；The resistance R10 other end, electric capacity C5 it is another
The other end at end, the resistance R11 other end, the electric capacity C6 other end and resistance R12 is grounded GND simultaneously；Operational amplifier U2's
Reverse input end connects one end of resistance R13 one end, resistance R14 one end and electric capacity C7 simultaneously；Resistance R13 another termination
Variable resistor R15 one end and variable resistor R15 control terminals, the variable resistor R15 other end and the electric capacity C7 other end are simultaneously
Connect operational amplifier U2 output end；Resistance R14 other end ground connection GND；Operational amplifier U2 output end forms sound width
The output end of value detection circuit.
As an improvement, magnitude of sound detection circuit still further comprises electric capacity C8 and electric capacity C9；Electric capacity C8 one end, electric capacity
C9 one end and operational amplifier U2 power positive end meet positive source VSS simultaneously, and the electric capacity C8 other end and electric capacity C9's is another
One end is grounded GND simultaneously.
In such scheme, 1 is shared with the voice recognition circuit of sound acquisition module all the way and sound amplitude detection circuit
Microphone MIC.
In such scheme, sound acquisition module is 4 tunnels, this 4 tunnel sound acquisition module be separately mounted to automobile front side, after
Side, left side and right side.
As an improvement, the vehicle-mounted intelligent monitoring system still further comprises information display module, the information display module
Input and microprocessor output end connect.
In such scheme, the quantity of wireless transport module both can be 1；Can be with the quantity one of sound acquisition module
Cause, Ji Mei roads sound acquisition module is furnished with 1 wireless transport module；
Compared with prior art, the utility model can in the case of the unmanned guard of parking, Intelligent Recognition intensity of sound and
Orientation, targetedly power-on be monitored recording, so as to save energy resource consumption and data space.
Brief description of the drawings
Fig. 1 is a kind of theory diagram of the vehicle-mounted intelligent monitoring system based on sound bearing identification.
Fig. 2 is the schematic diagram of voice recognition circuit.
Fig. 3 is the schematic diagram that magnitude of sound detects circuit.
Fig. 4 is sound acquisition module flow chart.
Fig. 5 is that microcontroller receives flow chart.
Embodiment
A kind of vehicle-mounted intelligent monitoring system based on sound bearing identification, as shown in figure 1, mainly by sound more than 2 tunnels
Acquisition module, the wireless transport module of more than 2, microprocessor, information display module, motor drive module, steering motor and
Camera forms.Include voice recognition circuit and sound amplitude detection circuit per road sound acquisition module.Voice recognition circuit is adopted
It is connected with wired mode with microprocessor, magnitude of sound detection circuit is then connected using wireless mode with microprocessor.Sound is known
The output end of other circuit is directly connected to an input of microprocessor.Magnitude of sound detection circuit connects via wireless transport module
Connect another input of microprocessor.One output end of microprocessor connects steering motor via motor drive module.Take the photograph
As head is arranged in steering motor.The shooting of another output end connection camera of microprocessor starts control terminal.Information shows
Show that the input of module and the output end of microprocessor connect.
Sound acquisition module detects the intensity and azimuth information of sound.Described sound acquisition module is in the utility model
Two ways be present, one is digital quantity transmits, characterize whether with the presence of sound on certain specific direction, it is real by voice recognition circuit
It is existing；The second is measurement sound amplitude information, sound on certain specific direction is characterized by A/D collections and a certain amount of average value filtering
Size, circuit realiration is detected by magnitude of sound.
Referring to Fig. 2, voice recognition circuit is used to monitor sound and whether there is, including microphone MIC, triode T1, compares
Device U1, LED diode D1, resistance R1-R6, variable resistor R7 and electric capacity C1-C4.After resistance R6 and electric capacity C3 is in parallel, and
It is connected on microphone MIC both ends.Microphone MIC one end connects resistance R1 one end and electric capacity C2 one end simultaneously.Electric capacity C2
The other end simultaneously resistance R2 one end and triode T1 base stage.Triode T1 colelctor electrode connects the one of resistance R3 simultaneously
The inverting input at end, electric capacity C4 one end and comparator U1.Electric capacity C1 one end and resistance R1-R3 another termination power electricity
Press VDD.The electric capacity C1 other end, the microphone MIC other end, triode T1 emitter stage and electric capacity C4 other end ground connection
GND.Variable resistor R7 termination a supply voltage VDD, variable resistor R7 other end ground connection GND, variable resistor R7 control
Terminate comparator U1 in-phase input end.Resistance R4 termination comparator U1 output end, another termination supply voltage VDD.
Resistance R5 one end is connected with LED diodes D1 negative electrode, resistance R5 another termination comparator U1 output end, the poles of LED bis-
Pipe D1 anode meets supply voltage VDD.Comparator U1 output end forms the output end of voice recognition circuit.In the utility model
In, comparator U1 power positive end meets supply voltage VDD；Comparator U1 power supply negative terminal ground connection GND.
Realize the digitized process of the analog information of sound, when voice signal is spread out of, LED diodes D1 also can be with
The flicker of voice signal.Electric capacity C3 and resistance R6 is that the radio-frequency component in voice signal is filtered out, and this is due to high frequency
Twocomponent signal may be due to that the noise of device produces, and this noise can cause very big influence even to judge by accident to system.
The voice signal of collection is coupled by electric capacity C2, and certain amplification is carried out by 9014 triode T1, and the signal of output leads to again
Cross electric capacity C4 to filter out high-frequency signal, be now to eliminate triode T1 caused high frequency effects in amplification process.The letter of output
Reverse input end number directly with LM393 comparators U1 is connected.Wherein LM393 comparators U1 input in the same direction be connected to by
The voltage that accurate adjustment electric resistance partial pressure is formed.By appropriate regulation, the sensitivity of electric circuit inspection voice signal can be adjusted.Work as sound
Amplitude by amplification after be more than electric resistance partial pressure voltage when, reverser output signal be just changed into low level, work as voiceless sound
When, just it is defaulted as high level.Because voice signal is continuous waveform signal, therefore comparator output is a series of pulse
Signal, rear class output are connected through wireless transport module with microcontroller.After voice signal is by gathering, entered using LM386
The amplification of row signal, LM386 are power amplifier of the TI companies dedicated for audible level, the configured fixation of its chip internal
For 20 times of gain, if desired gain is more than 20, then in the pin and octal outer meeting resistance and electric capacity of chip, sets its gain
Between 20~200.In Tthe utility model system, substantially 150 times of the gain coefficient of setting, pass through such amplification, sound
Between the amplitude range of sound could be arranged to 0~3v, it is easy to the processing of rear class.
Referring to Fig. 3, magnitude of sound detects the specific intensity of circuit monitoring sound, including microphone MIC, operational amplifier
U2, diode D2, resistance R8-R14, variable resistor R15 and electric capacity C5-C7.The one of resistance R8 one end connection microphone MIC
End, microphone MIC other end ground connection GND.The resistance R8 other end connect simultaneously diode D2 anode and resistance R10 one
End.Diode D2 negative electrode connects one end of electric capacity C5 one end, resistance R11 one end and resistance R9 simultaneously.Resistance R9's is another
One end connects the in-phase input end of electric capacity C6 one end, resistance R12 one end and operational amplifier U2 simultaneously.Resistance R10's is another
One end, the electric capacity C5 other end, the resistance R11 other end, the electric capacity C6 other end and resistance the R12 other end are grounded simultaneously
GND.Operational amplifier U2 reverse input end connects the one of resistance R13 one end, resistance R14 one end and electric capacity C7 simultaneously
End.Resistance R13 another termination variable resistor R15 one end and variable resistor R15 control terminals, the variable resistor R15 other end
Operational amplifier U2 output end is connect simultaneously with the electric capacity C7 other end.Resistance R14 other end ground connection GND.Operational amplifier
U2 output end forms the output end of magnitude of sound detection circuit.In utility model, comparator U1 power positive end is via general
It is powered and holds C8 and electrochemical capacitor C9 and meet positive source VSS, be i.e. electric capacity C8 one end, electric capacity C9 one end and operational amplifier U2
Power positive end meets positive source VSS simultaneously, and the electric capacity C8 other end and the electric capacity C9 other end are grounded GND simultaneously；Comparator U1
Power supply negative terminal meet power cathode-VSS.
Peakvalue's checking is carried out using LM358 operational amplifiers U2.It is former that peakvalue's checking is formed based on LM358 operational amplifiers U2
Reason is as follows：Because voice signal amplitude is larger, signal amplitude is halved using bleeder circuit in prime, in the positive half cycle of signal
When, detector diode conducting, the RC wave filters formed to electric capacity and resistance charge, the electric capacity C6 and resistance R12 structures of rear class
Into wave filter, because electric capacity C6 and resistance R12 parameter are very big, cause its time constant also relatively large, so as to fill
The speed of electricity is more than the speed of electric discharge.The voltage at electric capacity both ends may remain at maximum voltage, the operational amplifier structure of rear class
Into a grade follower circuit is penetrated, buffer action is played, and then complete peakvalue's checking.It can be good at detecting sound in the circuit
Amplitude information, circuit shows extremely good in low-frequency effect, is observed by connecing signal source and oscillograph, it is found that the circuit can
Range value can be normally detected in 10Hz or so signal, can be good at meeting the needs of system.
Voice recognition circuit and sound amplitude detection circuit can respectively set a microphone MIC to be acquired to sound,
But the reason for considering cost and reliability, in the utility model preferred embodiment, with the sound of sound acquisition module all the way
Identification circuit and sound amplitude detection circuit share 1 microphone MIC.
According to customer demand and the way for needing to be equipped with sound acquisition module of acquisition precision, adopted per road sound acquisition module
With different coded markings, there is delay in the transmission of sound, when the sound of different azimuth is transferred to system, apart from sound source position most
Near collection point will monitor acoustic impluse at first, so as to judge sound bearing.In the utility model preferred embodiment, sound
Sound acquisition module is 4 tunnels, and this 4 tunnel sound acquisition module is separately mounted to front side, rear side, left side and the right side of automobile.Using 4
Sound collection point, it is respectively deployed in each end of " ten " font framework.Signal acquisition point is placed in 4 orientation all around, when micro-
When controller needs to carry out sound collection, by four collection point signal open detection patterns.
Claims (8)
- A kind of 1. vehicle-mounted intelligent monitoring system based on sound bearing identification, it is characterised in that：By wireless transport module, microprocessor Sound acquisition module compositions more than device, motor drive module, steering motor, camera and 2 tunnels；Include voice recognition circuit and sound amplitude detection circuit per road sound acquisition module；The wherein output of voice recognition circuit End is directly connected to an input of microprocessor；Magnitude of sound detects circuit and connects microprocessor via wireless transport module Another input；One output end of microprocessor connects steering motor via motor drive module；Camera is arranged in steering motor； The shooting of another output end connection camera of microprocessor starts control terminal.
- A kind of 2. vehicle-mounted intelligent monitoring system based on sound bearing identification according to claim 1, it is characterised in that：Voice recognition circuit include microphone MIC, triode T1, comparator U1, LED diode D1, resistance R1-R6, can power transformation Hinder R7 and electric capacity C1-C4；After resistance R6 and electric capacity C3 is in parallel, microphone MIC both ends are attempted by；Microphone MIC one end connects resistance simultaneously R1 one end and electric capacity C2 one end；The electric capacity C2 other end while resistance R2 one end and triode T1 base stage；Triode T1 colelctor electrode connects the inverting input of resistance R3 one end, electric capacity C4 one end and comparator U1 simultaneously；The one of electric capacity C1 End and resistance R1-R3 another termination supply voltage VDD；The electric capacity C1 other end, the microphone MIC other end, triode T1 Emitter stage and electric capacity C4 the other end ground connection GND；Variable resistor R7 termination a supply voltage VDD, variable resistor R7 other end ground connection GND, variable resistor R7 control Terminate comparator U1 in-phase input end；Resistance R4 termination comparator U1 output end, another termination supply voltage VDD； Resistance R5 one end is connected with LED diodes D1 negative electrode, resistance R5 another termination comparator U1 output end, the poles of LED bis- Pipe D1 anode meets supply voltage VDD；Comparator U1 output end forms the output end of voice recognition circuit.
- A kind of 3. vehicle-mounted intelligent monitoring system based on sound bearing identification according to claim 1, it is characterised in that：Magnitude of sound detection circuit includes microphone MIC, operational amplifier U2, diode D2, resistance R8-R14, variable resistor R15 and electric capacity C5-C7；Resistance R8 one end connection microphone MIC one end, microphone MIC other end ground connection GND；The resistance R8 other end is same When connect diode D2 anode and resistance R10 one end；Diode D2 negative electrode connects electric capacity C5 one end, resistance simultaneously R11 one end and resistance R9 one end；The resistance R9 other end connects electric capacity C6 one end, resistance R12 one end and fortune simultaneously Calculate amplifier U2 in-phase input end；The resistance R10 other end, the electric capacity C5 other end, the resistance R11 other end, electric capacity C6 The other end and resistance R12 the other end simultaneously be grounded GND；Operational amplifier U2 reverse input end connects the one of resistance R13 one end, resistance R14 one end and electric capacity C7 simultaneously End；Resistance R13 another termination variable resistor R15 one end and variable resistor R15 control terminals, the variable resistor R15 other end Operational amplifier U2 output end is connect simultaneously with the electric capacity C7 other end；Resistance R14 other end ground connection GND；Operational amplifier U2 output end forms the output end of magnitude of sound detection circuit.
- A kind of 4. vehicle-mounted intelligent monitoring system based on sound bearing identification according to claim 3, it is characterised in that：Sound Sound amplitude detection circuit still further comprises electric capacity C8 and electric capacity C9；Electric capacity C8 one end, electric capacity C9 one end and operation amplifier Device U2 power positive end meets positive source VSS simultaneously, and the electric capacity C8 other end and the electric capacity C9 other end are grounded GND simultaneously.
- 5. a kind of vehicle-mounted intelligent monitoring system based on sound bearing identification according to Claims 2 or 3, its feature exist In：1 microphone MIC is shared with the voice recognition circuit of sound acquisition module all the way and sound amplitude detection circuit.
- A kind of 6. vehicle-mounted intelligent monitoring system based on sound bearing identification according to claim 1, it is characterised in that：Sound Sound acquisition module is 4 tunnels, and this 4 tunnel sound acquisition module is separately mounted to front side, rear side, left side and the right side of automobile.
- A kind of 7. vehicle-mounted intelligent monitoring system based on sound bearing identification according to claim 1, it is characterised in that：Also Further comprise information display module, the input of the information display module and the output end of microprocessor connect.
- A kind of 8. vehicle-mounted intelligent monitoring system based on sound bearing identification according to claim 1, it is characterised in that：Nothing The quantity of line transport module is consistent with the quantity of sound acquisition module, and Ji Mei roads sound acquisition module is wirelessly transferred mould equipped with 1 Block.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720314617.XU CN206726303U (en) | 2017-03-29 | 2017-03-29 | A kind of vehicle-mounted intelligent monitoring system based on sound bearing identification |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201720314617.XU CN206726303U (en) | 2017-03-29 | 2017-03-29 | A kind of vehicle-mounted intelligent monitoring system based on sound bearing identification |
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| CN206726303U true CN206726303U (en) | 2017-12-08 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106875512A (en) * | 2017-03-29 | 2017-06-20 | 桂林电子科技大学 | A kind of vehicle-mounted intelligent monitoring system based on sound bearing identification |
| CN108919144A (en) * | 2018-05-28 | 2018-11-30 | 广州市明美光电技术有限公司 | A kind of LED light output signal real-time monitoring system |
-
2017
- 2017-03-29 CN CN201720314617.XU patent/CN206726303U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106875512A (en) * | 2017-03-29 | 2017-06-20 | 桂林电子科技大学 | A kind of vehicle-mounted intelligent monitoring system based on sound bearing identification |
| CN108919144A (en) * | 2018-05-28 | 2018-11-30 | 广州市明美光电技术有限公司 | A kind of LED light output signal real-time monitoring system |
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| CF01 | Termination of patent right due to non-payment of annual fee |
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| CF01 | Termination of patent right due to non-payment of annual fee |