CN105100734A - Smart audio video mixed acquisition device adopting wireless induction charging wristband - Google Patents
Smart audio video mixed acquisition device adopting wireless induction charging wristband Download PDFInfo
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Abstract
The invention relates to a smart audio video mixed acquisition device adopting a wireless induction charging wristband, belonging to the field of smart homes. The device is a structurally ordered system formed by mutual interaction and combination of various electronic functional modules, and provides an intelligentized adjustable environment for humans or other animals. The device comprises a voice command acquisition unit, a mixed power supply device, a central processor and a video monitoring unit. The video monitoring unit comprises an analog camera, a video A/D converter, a field programmable gate array (FPGA) processor and a digital signal processor (DSP), which are connected in sequence. The FPGA processor is connected with a static random access memory (SRAM)1 and an SARM0. The DSP is connected with the video A/D converter through an I2C bus. The DSP is connected with a memory device. The voice command acquisition unit, the mixed power supply device and the video monitoring unit are all connected with the central processor.
Description
Technical field
The invention belongs to intelligent domestic system technical field, provide the intelligent audio, the video mix harvester that adopt radio induction charging bracelet.
Background technology
Along with the proposition of domestic " the Internet+" theory, " the Internet+" a period of time, every field started upsurge at home, and compare over the today of greatly improving in people's material and cultural life, the intelligence degree of the many living environment of people proposes new requirement, people can not meet the regulation and control of traditional Artificial Control to living environment, and new requirement is proposed to the intelligence degree of living environment, thus Smart Home obtains new development under " the Internet+" theory, " the Internet+" it represent a kind of new social pattern, namely the optimization of the Internet in configuration of social resources and integrated effect is given full play to, the innovation achievement degree of depth of the Internet is blended in economy, among each field of society, promote innovation and the productivity of the whole society, form the economic development neomorph of facility and implementation tool based on the Internet widely.
The origin of Smart Home concept very early, but there is not concrete building case to occur always, until American Association scientific & technical corporation (UnitedTechnologiesBuildingSystem) when information-based for Architectural Equipment, integration concept are applied to the CityPlaceBuilding of U.S. Connecticut (Conneticut) Hart Fo Shi (Hartford) in 1984, just occur " intelligent building " of first, from then on opened the prelude that Smart Home group is fallen over each other to build in the whole world.
In the sub-exhibition of Guangzhou light in 2014, Smart Home carries all before one especially, becomes the favorite of this product, and simultaneously also along with the development of 4G, the continuous enhancing of network signal covers, and has also expedited the emergence of the continuous fast development of Smart Home industry.
Instantly a lot of Smart Home product has come into the family of we ordinary people, and the family of let us really realizes intelligence, and environmental protection is comfortable and safe, and also the life of let us increases more enjoyment simultaneously.The coming five years we will welcome the first year of Smart Home develop rapidly.
Smart Home, or title intelligent dwelling, take house as platform, have both building, network service, information household appliances, equipment automatization, efficient, comfortable, safety, facility that collecting system, structure, service, management are integrated, the living environment of environmental protection, show fully convenient by the various equipment (as audio & video equipment, illuminator, curtain control, airconditioning control, safety-protection system, Digital Theater System, network home appliance etc.) in family by home-network linkups to together.Utilize comprehensive wiring technology, the network communications technology, security precautions technology, automatic control technology, audio frequency and video technology by integrated for facility relevant for life staying idle at home, build the management system of efficient housing facilities and family's schedule affairs, promote house security, convenience, comfortableness, artistry, and realize the living environment of environmental protection and energy saving.
The Smart Home ecosystem to be interacted the structurally ordered system be combined into by various electronic functional module, and it provides an intelligentized adjustable environment for the mankind or other animal.
The Smart Home ecosystem mainly comprises: home cabling system, domestic network system, Intelligent housing management system, lighting of home control system, Household security system, background music system, home theater and eight Iarge-scale system such as multimedia system, home environment control system.And along with the develop rapidly of speech recognition technology, the accuracy rate of existing speech recognition technology reaches more than 95%, therefore the instruction identification of speech recognition technology in intelligent domestic system is widely used, therefore just extremely important to the pickup of the phonetic control command of premises, the instruction sent as other electronic equipments of raising one's voice can be there is and can be judged by accident by intelligent domestic system in voice signal when pickup, if and user has gone out, the phonetic order sent in television set has also likely been performed by intelligent domestic system identification.
Summary of the invention
The object of the present invention is to provide a kind of Smart Home ecosystem, it can to interact the structurally ordered system be combined into by various electronic functional module, and it provides an intelligentized adjustable environment for the mankind or other animal.
In order to achieve the above object, the present invention adopts following technical scheme:
Adopt intelligent audio, the video mix harvester of radio induction charging bracelet, it comprises:
Adopt intelligent audio, the video mix harvester of radio induction charging bracelet, it is characterized in that, comprising:
Voice collecting bracelet: for receiving the phonetic order be used for, comprises the Doppler's voice acquisition device for gathering voice signal and signal Doppler leading portion voice signal acquisition device;
Central processing unit: for the treatment of each equipment of cooperation control;
Video monitor unit: comprise the simulation camera be linked in sequence, video a/d converter, FPGA processor, dsp processor, described FPGA processor is connected with SRAM1 memory and SARM0 memory, dsp processor connects video a/d converter by I2C bus, and dsp processor is connected with memory device;
Described phonetic order collecting unit, video monitor unit are all connected with central processing unit;
Voice collecting bracelet comprises table body (1) and watchband (2-1,2-2), it is characterized in that: table body arranges inner chamber, the solar charging circuit being provided with wireless Mac circuit in inner chamber and powering for wireless Mac circuit,
Table body arranges inner chamber (1-5) and bonnet (3), and inner chamber (1-5) is divided into induction cavity (1-4-1) and circuit installation cavity (1-4-2), is provided with winding coil LO in induction cavity (1-4-1),
The inner solar charging circuit being provided with wireless Mac circuit and powering for wireless Mac circuit of circuit installation cavity (1-4-2);
Described table body (1) is provided with rectangular channel (1-1), and be provided with routing hole (1-2) in rectangular channel (1-1), solar charging circuit comprises solar energy electroplax, and solar energy electroplax is arranged in rectangular channel (1-1);
Described table body is provided with the MIC through hole (1-6) for installing microphone;
Described table body side surface is provided with a day line three-way hole (1-7).
In technique scheme, front end receiver device comprises,
Signal input circuit: for receiving radio signals, comprises the resonant circuit that coil T1 and trimming capacitor C A forms, and coil T1 comprises a winding and secondary winding, and one time winding two ends connect trimming capacitor C A;
Mixting circuit: the radio signal received is become intermediate frequency, comprises triode VT1, and the emitter oscillation signals according of triode VT1 to the signal madulation of the resonant circuit input of coil T1, trimming capacitor C A composition, can obtain intermediate-freuqncy signal at collector electrode;
Intermediate frequency amplifier circuit: intermediate frequency amplitude-modulated signal is amplified to the size required by detecting circuit;
Detecting circuit: the audio signal entrained by intermediate frequency amplitude-modulated signal taken off, gives preposition audio amplifier of loweing;
Preposition audio amplifier of loweing: detection audio signal is out carried out voltage amplification;
Power module: provide power supply, adopts electric capacity half-wave reduction voltage circuit.
In technique scheme; described solar charging circuit comprises the solar energy electroplax, self-excited oscillation circuit, high frequency boosting unit, rectification circuit, pressure limiting circuit, the filter circuit that are linked in sequence; described high frequency boosting unit adopts high frequency transformer; high frequency transformer comprises coil N1 and the coil N2 of primary side, second siding ring N3; The coil N2 that self-excited oscillation circuit comprises triode Q1, the electronics R1 connected successively, resistance R3, electric capacity C2, electric capacity C2 connect high frequency transformer, the collector electrode wiring circle N1 of triode Q1, grounded emitter;
In technique scheme; pressure limiting circuit comprises triode Q2, resistance R5, resistance R6, diode VD2; the collector electrode connecting resistance R1 of triode Q2 and the link of resistance R3; base stage is by the common port of diode VD2 connecting resistance R5 and resistance R6; wiring circle N3 two ends after resistance R5 connects with resistance R6, described filter unit comprises the electric capacity C3 of wiring circle N3 output; Described rectification circuit comprises diode D1, diode D1 wiring circle N3 positive output end.
In technique scheme, wireless Mac circuit comprises resistance R7, electric capacity C4-C8, inductance L 1-L2, switch S 1, power supply, triode Q3, positive source connecting valve S1 first end, second end of switch S 1 passes through the base stage of electric capacity C4 connecting triode Q3, the base stage of triode Q3 connects biasing resistor R7, the other end of biasing resistor R7 connects power supply by switch S 1, the collector electrode of triode connects electric capacity C5, inductance L 1, electric capacity C6, electric capacity C5, the other end of inductance L 1 connects power supply by switch S 1, the emitter of the other end connecting triode Q3 of electric capacity C6, the emitter of triode is connected with microphone MIC, microphone MIC connects power cathode, electric capacity C8 is connected to both ends of power, the emitter of triode Q3 connects electric capacity C7, electric capacity C7 connects inductance L 2, inductance L 2 is connected with antenna.
In technique scheme, described watchband (2-1,2-2) comprises interior band (2-2), in addition (2-1), interior band (2-2) is provided with fixing hole (2-4), tyre is provided with the buckle (2-5) coordinated with fixing hole (2-4); Described table body (1) is provided with shift knob (1-8); Described induction cavity (1-4-1) and circuit installation cavity (1-4-2) are separated by rectangular clapboard (1-4); Described bonnet is provided with Ka Jiao (3-1), and positioning convex (3-2), table body (1) inner chamber (1-5) inwall is provided with and Ka Jiao (3-1), and the groove (1-3,1-3-1) that positioning convex (3-2) coordinates.
Compared with the existing technology, its beneficial effect shows in the present invention:
One, the present invention adopts rectangular channel to fix solar energy electroplax, increases the back side lifting surface area of solar energy electroplax, can increase the compression capability of solar energy electroplax, prevents solar energy electroplax from being damaged by pressure.
Two, microphone signal of the present invention inputs from transistor base unlike the past, but microphone is connected on emitter, when microphone self inductance current is with sound size variation, the operating current of Q3 also can change thereupon, Cbe variate is simultaneously held in Q3 economize on electricity, in parallel with LC loop again after Cbe and C4 series connection, therefore, achieve frequency modulation.This connection of MIC completely avoid the distortion of audio signal through coupling capacitance, and therefore, the Hz-KHz of this microphone is wide, and tonequality is pure, working stability, even if hand touches antenna also can not affect LC frequency of oscillation.
Three, the application bracelet its adopt solar powered, the overall enhanced flying power of Intelligent bracelet, efficiently solves the high energy consumption problem of bracelet.
Accompanying drawing explanation
Fig. 1 is intelligent domestic system structured flowchart;
Fig. 2 is Doppler's voice acquisition device circuit diagram of Intelligent household central control system;
Fig. 3 is video acquisition module block diagram;
The receiving terminal circuit figure of the voice acquisition device of Fig. 4 Intelligent household central control system;
Fig. 5 is the AC-battery power source power supply device block diagram of intelligent domestic system;
Fig. 6 is the voltage collection circuit in AC-battery power source power supply device;
Fig. 7 is the structured flowchart of the DC/DC transducer of AC-battery power source power supply device;
Fig. 8 is infrared module block diagram;
Fig. 9-10 is the structural representation of the application;
Figure 11 removes internal structure sketch after bonnet for this practical new table body;
Figure 12 is the bonnet schematic diagram of the application;
Figure 13 is table body separation structure sketch of the present invention;
Figure 14-15 is the inner-cavity structure sketch of the application;
Figure 16 is the wireless Mac circuit of the application, the circuit diagram of solar charging circuit entirety;
Figure 17 is the application's structured flowchart.
Embodiment
Below in conjunction with the drawings and the specific embodiments, the invention will be further described.
Traditional ecosystem is by the biological structurally ordered system be combined into abiotic interaction.And at electronic technology field, particularly in Smart Home technical field, whether also there is the concept of the ecosystem? here the application defines the concept of the Smart Home ecosystem: the Smart Home ecosystem to be interacted the structurally ordered system be combined into by various electronic functional module, and it provides an intelligentized adjustable environment for the mankind or other animal.
Be intelligent domestic system structured flowchart as shown in figure 15, i.e. Smart Home ecosystem structure block diagram, it comprises instruction acquisition array, instruction reception unit, processing and control element (PCE), instruction sending module, communication module, performance element, information acquisition unit, memory cell etc.
The instruction acquisition unit that wherein the application proposes can adopt phonetic order collection, button collection, or the mode such as limbs identification.
Instruction reception unit, its communication mode can adopt the modes such as wired, wireless, sound wave, infrared, bluetooth to communicate.
Instruction sending module, can adopt infrared, bluetooth, wired or other radio transmission modes.
Communication module, can adopt the modes such as infrared, wifi, wire relay broadcasting.
Performance element can adopt the mode such as electronic switching device or relay.
Information gathering can comprise the information such as sound, video, ambient temperature, humidity, illumination.
Infrared module: infrared module is made up of single-chip microcomputer, infrared receiver transmitter, electric power management circuit.The Systematical control of whole remote controller is responsible for by single-chip microcomputer.Single-chip microcomputer, as main control chip, carries out keyboard scan, according to the instruction of user by input through keyboard, completes learning remote control code respectively; Control DSP carries out voice training, playback, identification; Convert recognition result to corresponding remote control mode, launched by infraluminescence pipe.By the RS232 serial protocol communication of standard between single-chip microcomputer and DSP.
Central processing unit: adopt dsp processor, dsp processor is connected with flash memory (FLASH), codec (CODEC).Wherein DSP is the core of whole sound identification module, is responsible for speech recognition (adopting existing speech recognition software), encoding and decoding speech, and the Read-write Catrol of FLASH.The advantage of DSP is fast operation, memory headroom is large, exchanges data speed is fast, can be used to realize complicated algorithm, improves discrimination, reduces reaction time delay, obtains higher recognition performance.Dsp chip selects the AD2186L of AnalogDevices company, and it has following features: 1. arithmetic speed reaches 40MIPS, and is efficient dull cycles per instruction; 2. provide the ram in slice of 40K byte, wherein 8K word (16Bit/ word) is data RAM, and 8K word (24Bit/ word) is program RAM, the maximum memory block reaching 4 Mbytes, for storing data or program; 3. 3.3V operating voltage, has multiple battery saving mode.AD2186L can complete the algorithm relevant at last to voice signal, is applicable to again using battery to make the remote controller of the energy.FLASH and CODEC also selects the chip of 3.3V operating voltage.FLASH is the AT29LV040A(4MBit of American ATMEL), it is as the memory of system, be mainly used in depositing following content: the parameter needed for suggestion voice synthesis, the code-book data after particular person training, application program and study and the remote control mode data of dsp system.CODEC selects the TLV320AC37 of American TI Company, is used for carrying out A/D, D/A conversion, Code And Decode.
Bracelet, comprises table body 1 and watchband 2-1,2-2, it is characterized in that: table body arranges inner chamber 1-5 and bonnet 3, and inner chamber 1-5 is divided into induction cavity 1-4-1 and circuit installation cavity 1-4-2,
The solar charging circuit being provided with wireless Mac circuit and powering for wireless Mac circuit in circuit installation cavity 1-4-2;
Described table body 1 is provided with rectangular channel 1-1, is provided with routing hole 1-2 in rectangular channel 1-1, solar charging circuit comprises solar energy electroplax, and solar energy electroplax is arranged in rectangular channel 1-1;
Described table body is provided with the MIC through hole 1-6 for installing microphone;
Described table body side surface is provided with a day line three-way hole 1-7.
In technique scheme, described watchband 2-1,2-2 comprise interior band 2-2, in addition 2-1, interior band 2-2 is provided with fixing hole 2-4, tyre is provided with the buckle 2-5 coordinated with fixing hole 2-4.
In technique scheme, described table body 1 is provided with shift knob 1-8.
In technique scheme, described induction cavity 1-4-1 and circuit installation cavity 1-4-2 is separated by rectangular clapboard 1-4.
In technique scheme, described bonnet is provided with card angle 3-1, and positioning convex 3-2, table body 1 inner chamber 1-5 inwall is provided with and card angle 3-1, and the groove 1-3 that positioning convex 3-2 coordinates, 1-3-1.
Circuit working principle is summarized as follows:
Triode Q1 is Switching Power Supply pipe, and it and T1, R1, R3, C2 etc. form self-excited oscillation circuit.After adding input power, electric current flows to the base stage of Q1 through starting resistance R1, makes Q1 conducting.After Q1 conducting, transformer N1 just adds input direct voltage, its collector current Ic increases at N1 neutral line, feedback coil N2 produces 3 positive 4 negative induced voltages, making Q1 obtain base stage is just, launches very negative positive feedback voltage, and this voltage injects base current through C2, R3 to Q1 makes the collector current of Q1 increase further, positive feedback produces avalanche process, makes Q1 saturation conduction.During Q1 saturation conduction, T1 stores magnetic energy by primary coil N1.
Meanwhile, induced voltage charges to C2, along with increasing of C2 charging voltage, Q1 base potential step-down gradually, when Q1 base current change can not meet its continue saturated time, Q1 exits saturation region and enters amplification region.
After Q1 enters magnifying state, its collector current is declined by the maximum before magnifying state, produces 3 negative 4 positive induced voltages at feedback coil N2, Q1 base current is reduced, its collector current reduces thereupon, and positive feedback occurs avalanche process again, and Q1 ends rapidly.
After Q1 cut-off, the energy that transformer T1 stores is supplied to load, and the 5 negative 6 positive voltages that secondary coil N3 produces, after diode VD1 rectifying and wave-filtering, C3 obtain direct voltage to charging mobile phone battery.
When Q1 ends, 3 negative 4 positive voltages of direct current supply defeated people voltage and N2 induction again through R1, R3 to C2 reverse charging, improve Q1 base potential gradually, make its conducting again, upset reaches capacity state again, and circuit repeats vibration like this and goes down.
R5, R6, VD2, Q2 etc. form pressure limiting circuit, and to protect battery not by overcharge, here for 3.6V battery of mobile phone, its charging deboost is 4.2V.In the charging process of battery, cell voltage rises gradually, when charging voltage is greater than 4.2V, after R5, R6 dividing potential drop, voltage stabilizing didoe VD2 starts conducting, make Q2 conducting, the shunting action of Q2 reduces the base current of Q1, thus reduces the collector current Ic of Q1, reaches the effect of restriction output voltage.At this moment circuit stopped the large current charge to battery, with small area analysis, the voltage of battery is maintained 4.2V.
Operation principle: the operation principle of this microphone is substantially identical with common wireless microphone circuit, but line and acoustical quality have improvement greatly.Circuit is shown in that accompanying drawing 1, Q3 and L1, C5, C6 etc. form FM high-frequency oscillating circuits, and adjustment L1, C5 value can change operating frequency.C6 is the feedback capacity maintaining vibration.Microphone signal inputs from transistor base unlike the past, but microphone is connected on emitter, when microphone self inductance current is with sound size variation, the operating current of Q3 also can change thereupon, Cbe variate is simultaneously held in Q3 economize on electricity, in parallel with LC loop again after Cbe and C4 series connection, therefore, achieve frequency modulation.This connection of MIC completely avoid the distortion of audio signal through coupling capacitance, and therefore, the Hz-KHz of this microphone is wide, and tonequality is pure, working stability, even if hand touches antenna also can not affect LC frequency of oscillation.
Element is selected to make: oscillating tube Q3 selection fT>1000MHz, Icm >=100Ma, the high-frequency tube that β value is larger, as C6355, C6358, BFR96 etc.The Icm of 9018 only has 50mA, but can select according to actual; MIC selects the moving-coil microphone of 600 Ω, and current medium-to-high grade cable microphone mostly is this type of; L1 internal diameter is 5mm, forms around 5T with Φ 0.5mm enamelled wire hollow; Transmitting antenna directly can use finished antenna, also can make by oneself: coiler part internal diameter is 1cm, and hollow also elongates to 3cm around 15T, and straight extending portion is divided into 7cm, loads onto heating form with pyrocondensation gum cover, also can replace with the flexible conductor of an about 10cm.
Installation and debugging: element installs, check errorless after, switch on power, make receiver by a pocket FM receiver.It should be noted that and therefore, mains switch must be installed the VCD severe jamming reception that band radio frequency exports additional to radio-frequency modulator, use AV terminal broadcast program.Regulate FM receiver and L1 pitch of turn, make transmitting-receiving frequency corresponding, if desired by C5 switching value.The audio signal that broadcast receiver exports is transported to VCD by large plug or sound amplifier carries out power amplification.Transmitting range and wireless sensitivity have much relations, but general all >=10 meters.
Doppler's voice acquisition device circuit diagram of Intelligent household central control system, operation principle as shown in Figure 2, in figure, the line voltage of 220V is through C4 step-down, after D2, D1 halfwave rectifier, C1 filtering, again through the shunt regulating circuit voltage stabilizing of R6 and V1, DW1, R1, C5 composition, for whole circuit provides operating voltage.V2 and surrounding component composition micro-wave resonator circuit thereof, electric wave is launched by circular loop antenna, and circular loop antenna is also the reception antenna of reflection electromagnetic wave simultaneously, and R20 is the load resistance of V2 difference frequency signal, and it and R5 set up the working point of this grade jointly.V3 emitter follower plays impedance transformation effect, reduces rear class to the impact of microwave oscillation stage gain.This circuit one piece of LM324 completes amplification to prime signal, compares, light-operated, delay function, and IC1D forms a low pass amplifying circuit, filters 50Hz interference signal.The input current potential of IC1D is provided by the dividing potential drop of resistance R14, R13, and its resistance is equal, and partial pressure value is the half of supply voltage.{ change of output voltage with input terminal voltage on 1/2nd supply voltages of 14} pin changes output up and down.IC1A, R15, R17, C7 form a Floating comparator, the current potential of input by IC1D 14} pin voltage determined, and the dividing potential drop of R15 and R17 be added in IC1A 2., 3. between pin.Time static, 2. pin voltage is higher than 3. pin voltage, and output is pin output low level 1..When prime exports alternating signal, 2. pin equals AC earth by C7, and 2. AC signal is added to, 3. between pin, after relatively, 1. pin exports square-wave signal.IC1C, D3, R10, C6 form delay circuit, and wireless Mac circuit is under conducting state, and 7. pin exports high level, D3 ends, 9. pin is by the effect of R10,9. will pull into high level by pin, and the in-phase input end of IC1C passes through the dividing potential drop of R12, R8, the resistance of R8 is the twice of R12, this voltage is 2/3rds of supply voltage, because the voltage of reverse input end is higher than the voltage of in-phase input end, and 8. pin output low level, controllable silicon triggerless voltage and ending, wireless Mac circuit does not work.If the 7. unexpected step-down of pin current potential, D3 conducting, C6 charges rapidly, and 9. pin pulls into low level because of under 7. pin level, and 9. pin voltage is lower than 10. pin voltage, 8. pin output HIGH voltage, and controllable silicon is triggered conducting, wireless Mac circuit work.When after 7. pin voltage resume high potential, 9. the voltage of pin keeps low level under the effect of C6, and C6 is discharged by R10,9. pin voltage raises, and when the voltage of 9. pin exceedes the voltage of 10. pin, 8. the level reversion of pin becomes low level, controllable silicon loses trigger voltage, and wireless Mac circuit does not work.The above-mentioned discharge time of C6 is exactly the time of wireless Mac circuit delay cut-off.1. the square-wave signal that pin exports is added to magnitude of voltage on 6. pin by R16, when R16 pressure value is greater than the 5. pin voltage of IC1B, output pin can be made 7. to reverse, wireless Mac circuit conducting.Resistance R7 be one faint every level positive feedback resistor, make once after 8. pin becomes high level, 8. the high voltage of pin makes the in-phase input end voltage of IC1D raise, Ji Jin Zhuo pin voltage is caused to raise, 1. pin voltage raises, and 7. pin voltage step-down, strengthens the negative pulse width of 7. pin, make C6 have enough charging intervals, thus ensure that the consistency of wireless Mac circuit conducting time delayed turn-off.
wireless Mac circuit
MIC is Electret condenser microphone, and its effect is exactly the weak vibration of sound wave in induction air, and exports with the same signal of telecommunication of sound variation rule.The microphone that sensitivity that what our station was selected is is higher, generally can export the audio signal of more than tens millivolts, and this signal is enough to the frequency of the high-frequency oscillation signal modulating next stage.Attention: microphone has dividing of both positive and negative polarity, what general and shell communicated is negative pole.R31 is the biasing resistor of MIC electret microphone, has had this resistance, and microphone could output audio signal, this is because itself there is a pole field effect transistor amplification circuit MIC microphone inside, is used for impedance matching and improve the effects such as fan-out capability.C15 is audio signal coupling capacitance, and sound signal of telecommunication special delivery microphone induction exported is to next stage.C12 is the base stage filter capacitor of triode Q, on the one hand filtering high-frequency cacophony, allows the high frequency current potential of triode Q be 0 on the other hand, and concerning the high-frequency circuit of more than 50MHz, triode Q is a common-base amplification circuit, and this finally can form the basis vibrated.Because the basic condition of oscillating circuit is exactly to possess certain gain, possesses the feedback (being generally positive feedback) of appropriate phase besides.R32 is the base biasing resistor of triode Q, provides a less base current to triode Q, and triode Q has been R33 by having a larger emitter current.Because the function of current in R32, R33 can produce pressure drop and interact on each self-resistance, result can automatic stabilisation in a certain numeric state, Here it is emitter follower.R33 is the emitter resistance of triode Q, play the effect of stable DC working point here, and C13 also constitutes the effect of high-frequency signal load resistance, is also a part for whole high frequency oscillation circuit.C18 and L forms shunt-resonant circuit, plays the Main Function selecting frequency of oscillation, changes the capacity of C18 or changes the shape (comprising the number of turns) of L, can change tranmitting frequency easily.C17 is high-frequency signal output coupling capacitor, and object is that to be mapped to sky aerial in order to allow high-frequency signal become radio wave amplitude.Therefore, antenna preferably heavily fortified point is straight upwards, and length preferably equals radio wave frequency wavelength (or integral multiple), and surrounding should be open, does not have metal object to stop.
Illustrate: wavelength equals the inverse of frequency, frequency change, wavelength also can change, then says, the concrete length of antenna is also relevant with circuit output impedance, antenna thickness etc., in amateurish situation, has at will connect one section of electric wire just.If (in order to pursue transmitting range farthest, everybody can do the trial of this respect voluntarily, and our station element bag is through our station technical staff test, and effect can easily reach beyond 50 meters.) C16 is feedback capacity, the key element of circuit starting of oscillation has been exactly it.When analyzing the high frequency state of this circuit, collector electrode exports, and emitter is input, outputs signal and is added to input by C16, produce strong positive feedback, naturally just produces and vibrated.This is said Colpitts oscillation circuit in book in fact namely.C11, C14 are power filtering capacitors, provide loop to AC signal, reduce the AC internal Resistance of power supply.
voice signal receiver module
Voice signal receiver module operation principle by input circuit, i.e. selection circuit, or the signal behavior claiming tuning circuit that aerial many radio broadcasting stations are sent one of them, give mixting circuit.The frequency of input signal is become intermediate frequency by mixing, but its amplitude Changing Pattern does not change.The frequency of the high-frequency signal no matter inputted how, and the frequency after mixing is fixing, and China is defined as 465KHZ.Intermediate frequency amplitude-modulated signal is amplified to the size required by wave detector by intermediate frequency amplifier.By wave detector, the audio signal entrained by intermediate frequency amplitude-modulated signal is taken off, give preposition audio amplifier of loweing.Detection audio signal is out carried out voltage amplification by preposition low frequency amplifier.
Induction coil T1, trimming capacitor C A etc. in Fig. 4, composition resonant circuit, according to varying in size of CA, resonance, in different frequencies, obtains the radio signal of this frequency.Triode VT1 has amplification to the signal obtained, and the output current of amplification exports from collector electrode.Inductance T2, trimming capacitor C B and triode VT1 form local-oscillator circuit, and because trimming capacitor C A, trimming capacitor C B are interlocks, local oscillation frequency is always than the frequency height 465KHz of the resonant circuit of induction coil T1, trimming capacitor C A composition.Triode VT1 also plays mixing: its emitter oscillation signals according can to set specific frequency signal modulation (multiplying) of the resonant circuit input of induction coil T1, trimming capacitor C A composition, has the compositions such as the difference frequency of the resonance frequency that local oscillation frequency and triode VT, trimming capacitor C A form and frequency in collector current.Wherein difference frequency equals 465KHz.Coil T3, coil T4 are antiresonant circuits, and resonance frequency is all 465KHz, and signal outputs to next stage by the secondary coil of transformer.Triode VT2, triode VT3 play 465kHz signal (intermediate-freuqncy signal) voltage amplification effect.Triode VT3 is biased due to special in addition, also serves the effect (obtaining the envelope of amplitude-modulated signal) of detection.The effect of electric capacity C4-5 is the intermediate frequency component in filtering rectified signal, obtains audio signal.Triode VT4 is used for audio signal voltage and amplifies.
As shown in Figure 3 be video acquisition module, the mentality of designing of native system obtains vision signal by the video frequency pick-up head of simulation, then adopts modulus conversion chip SAA7111A the pal mode vision signal of simulation to be converted to the digital video signal of YUV4:2:2.Design uses fpga chip EP1C6Q240C8 as coprocessor, the buffer memory of vision signal and the synthesis of frame of video are come, the integrality of frame of video is realized by the ping-pong structure of two RAM, and after the preliminary treatment completing video data, video data is passed in DSP, complete specific video processnig algorithms (as compression etc., being existing conventional treatment algorithm), finally the video data processed transmitted and store.Meanwhile, primary processor DSP is also responsible for carrying out initial configuration to video capture processor.Its system hardware structure as shown in Figure 3.
The important step of video acquisition system, normally converts the light signal of outside to the signal of telecommunication, then by special Video Quality Metric chip, the vision signal of simulation is converted to digital video signal.That the application adopts is the high performance video analog-digital conversion ic chip SAA7111A of analog cmos camera and Philips company.
AA7111A is a high performance video input processing chip of Philips company.It has four road analog video signal inputs, can input 4 road CVBS or 2 road S video (Y/C) signals, and also can programme video input Zhong mono-tunnel, selection four road or two-way form different mode of operations; Can realize that row is synchronous, the automatic monitoring of field sync signal, separation, or field frequency 50Hz or 60Hz detects automatically, and can automatically switch between Phase Alternation Line system and INTSC system, simultaneously can input the luminance signal of standard to difference, color difference signal processes, control in real time in the sheet realizing brightness, colourity and saturation; I2C bus interface in SAA7111A can be arranged register in sheet.It has 32 control registers, and wherein 22 able to programme; The output of this device is 16 V.PO buses, and output format has 12 YUV4:1:1,16 YUV4:2:2,8 CCIR-656, the 888RGB of 16 565RGB and 24; Output signal can provide the multiple synchronization signals such as sampling clock, row are synchronous, field synchronization.
Video front process mould, the video data volume after digitlization is general all very huge.In order to ensure integrality and the real-time of video data, the system specialized designs front end processing block of video.Its major function has been the synthesis of the buffer memory of video data, frame of video, ping-pong operation and the communication with DSP.Because FPGA within is programmed repeatedly, system can be made to simplify, reduce board area, be easy to safeguard, upgrading is convenient, therefore, there is employed herein the EP1C6Q240C8 of ALTERA to complete video front processing capacity.
In order to ensure the real-time of video acquisition system, this system uses the table tennis mechanism of two RAM.The use of ping-pong operation in FPGA timing Design is very extensive, is a kind of typical in the design philosophy of area throw-over degree.This structure be by input traffic by during input data selection unit etc. by distribution of flows to two data buffer zones.At the 1st buffer circle, by the data flow cache of input in data buffering module 1; At the 2nd buffer circle, then by input data selection unit switching by input data flow cache to data buffering module 2, after the data in the 1st of data buffering module 1 buffer memory the cycle being passed through the selection of output data selection unit simultaneously, deliver to operation processing unit and process; After this in the 3rd buffer circle, again the constrained input buffer module of switch data.Circulation like this, goes round and begins again.
Video back-end process mould, native system adopts, the high-performance of TI company, low-power consumption fixed-point DSP chip TMS320VC5509A, and the master clock operating frequency of its inside reaches as high as 200MHz, the highest 400MIPS of processing speed; On the sheet of this DSP, RAM is comparatively large, comprises DARAM and 96K × 16,32K × 16 SARAM, memory space on the sheet of 128K × 16 altogether; Its On-Chip peripheral enriches, and comprises real-time clock RTC, 10 ADC, MCBSP interfaces, USB high-speed interfaces (speed is 12Mb/s), also has MMC/SD (multimedia card) interface, I2H interface etc.; This dsp processor is low voltage power supply, adopts the core voltage of 1.6V.The I/O voltage of 3.3V, low in energy consumptionly reaches 0.2mW/MIPS.
DSP, as the primary processor of video acquisition system, mainly completes the configuration of each class interface and peripheral hardware and the real-time process of video.Comprise clock generator (PLL), I2C bus interface, EMIF module, USB interface etc.
Each class interface only has co-ordination, just can ensure the normal operation of system.Wherein clock generator is responsible for being the system works clock of 200MHz by the crystal oscillator clock frequency multiplication of outside 24MHz: I2C bus is responsible for carrying out initial configuration to video capture processor SAA7111A: USB interface is responsible for communicating with host computer, to realize the transmission of data.
Consider the limitation of ROM on the huge of video data and DSP sheet, native system extends the FLASH of SDRAM and the piece 256K × 16bit of one piece of 4M × 16bit in DSP outside.Wherein SDRAM is mapped in CE2, CE3 space of DSP, and FLASH is mapped in CE1 space.Because Peripheral Interface configuration is general all comparatively complicated, because of be employed herein TI company sheet on Support Library function (CSL), with the configuration of simplified user interface.
Generally all can there is a lot of redundant information (temporal redundancy, spatial redundancies etc.) in video data, therefore there is the necessity of compression.The main purpose of Video coding is exactly under the prerequisite ensureing reconstruction quality, to try one's best, few bit number characterizes video information, remove the multiple redundancy properties that vedio data itself has, as spatial redundancy, time redundancy, mental visual redundancy and entropy code redundancy etc. as far as possible.H.261 and H.263 etc. common compression standard has JPEG, MPEG-1, MPEG-2.These algorithms are general all comparatively complicated, and the data volume of process is also very huge.And adopt the internal structure DSP such as Harvard's bus and pile line operation to have huge advantage in the realization of video processnig algorithms.Programming and the debugging of video algorithm can complete under CCS (codecomposerstudio) 2.0 environment, C language can be used to realize, be conducive to cross-platform transplanting, optimization and upgrading like this.
As shown in Figure 5 be AC-battery power source power supply device:
Solar units: comprise solar cell, solar cell is connected with DC/DC converter;
City's electric unit: city's electric unit comprises civil power is converted to galvanic AC/DC converter;
Charging control circuit: control the connection switching solar units, city's electric unit and storage battery;
Storage battery: storage of electrical energy and for load energy supply;
DSP control unit: according to the Detection Information of detecting unit, controls the operating state of charging control circuit;
Detecting unit: comprise the solar cell current sensing means for detecting solar cell size of current, detects the battery tension detecting unit of battery tension size.
Described battery tension detecting unit comprises: described battery tension detecting unit comprises: resistance R1 mono-termination storage battery, resistance R2 mono-termination benchmark comparative voltage, the resistance R1 other end connects the anode of diode D1, the resistance R2 other end connects the anode of diode D2, the negative electrode of diode D1 and the equal contact resistance R3 of the negative electrode of diode D2, the resistance R3 other end connects electric capacity C1, electric capacity C1 ground connection.
Solar units is solar cell permutation.
Described DC/DC converter output terminal is connected with inversion unit, and direct current is converted to alternating current and exports by inversion unit.
Described inversion unit output is provided with inversion unit output current voltage detection unit, and inversion unit output current voltage detection unit connects DSP control unit.
DC/DC converter comprises the inverter circuit, high frequency transformer, rectification circuit, the output record filter circuit that are linked in sequence, and the driver element of inverter circuit comprises pulse control circuit, and pulse control circuit adopts pulse width modulation chip TL494.Inside solves current regulator, pulse-width modulation and maximum current restriction simultaneously; some additional monitoring and protection functions are also provided with in chip; make chip have stronger antijamming capability and higher reliability, the control system outward element formed with this chip is less, and structure is simple.
Battery tension detecting unit comprises as described in Figure 6: described battery tension detecting unit comprises: resistance R1 mono-termination storage battery, resistance R2 mono-termination benchmark comparative voltage, the resistance R1 other end connects the anode of diode D1, the resistance R2 other end connects the anode of diode D2, the negative electrode of diode D1 and the equal contact resistance R3 of the negative electrode of diode D2, the resistance R3 other end connects electric capacity C1, electric capacity C1 ground connection.
System comprises the formations such as solar battery suppling circuit, mains-supplied circuit, storage battery and charging circuit, single-chip microcomputer and peripheral circuit thereof. and the electric current of solar cell is when current detection circuit detection is greater than 30mA (sunlight is enough strong), it is solar cell power supply after DC/DC conversion that Single-chip Controlling charging controls access power supply, this power supply is to charge in batteries. when microprocessor detect is more weak to sunlight, detect battery tension again, if battery tension is enough high, have storage battery to power to the load, system stops to charge in batteries; If battery tension is lower, civil power after AC/DC conversion through charging control circuit to charge in batteries, then to be powered to the load by storage battery. single-chip microcomputer and peripheral circuit thereof comprise PICI6C71, key circuit, warning circuit and liquid crystal display circuit. warnings system works abnormal alarm, storage battery under-voltage warning etc. be save system power dissipation employing liquid crystal display circuit to show the information such as solar cell electric current, battery tension, working state of system.
Described battery tension detecting unit comprises: resistance R1 mono-termination storage battery, resistance R2 mono-termination benchmark comparative voltage, the resistance R1 other end connects the anode of diode D1, the resistance R2 other end connects the anode of diode D2, the negative electrode of diode D1 and the equal contact resistance R3 of the negative electrode of diode D2, the resistance R3 other end connects electric capacity C1, electric capacity C1 ground connection.
Wherein voltage Vi and Vb is battery tension and benchmark comparative voltage respectively, be used for comparing and calculating accumulator voltage swing, resistance R1 and diode D1 tie point draw I/O-VL pin, resistance R1 and diode D1 tie point draw I/O-VB pin, I/O-VL pin, these two I/O of I/O-VB pin are used to effectively or inefficacy input voltage, when I/O-VL is as output, and when exporting zero, battery tension can not to capacitor charging, thus can make that reference voltage is interference-free to be charged on electric capacity, resistance R3 and electric capacity C1 forms RC circuit, its effect is exactly make the voltage of charging have a time of rising, be beneficial to microprocessor detect.
The Cleaning Principle of this circuit is, when detecting battery tension, I/O-VL pin is set to input pattern, I/O-VL pin is made to be high-impedance state, battery current is stoped to flow into I/O mouth, it is made to charge to electric capacity C1, pin I/O-VB is set to output mode simultaneously, and export zero, short circuit reference voltage power supply, when ensureing that storage battery is pressed in charging, do not disturb by reference voltage, when the threshold that the voltage on electric capacity is charged to single-chip processor i/o mouth differentiates voltage, record this period of time T1, above method is utilized to make reference voltage to capacitor charging equally, when the voltage rise on electric capacity is to the differentiation threshold voltage of I/O mouth, record T2 during this period of time.Since be aware of the charging interval of two voltages on identical RC circuit, the size of voltage just just can be obtained according to the charge formula Vc=V of RC circuit (1-E (-T/RC)).
If Fig. 7 is DC-DC converter integrated circuit, this DC/DC voltage changer is made up of main circuit, sample circuit, control circuit, drive circuit; The main circuit unit of Switching Power Supply, sample circuit unit, control circuit unit, drive circuit unit composition closed-loop control system are the automatic adjustment of relative output voltage.Control circuit unit is core with SG3525, accurately controls drive circuit, changes the drive singal of drive circuit, reaches the object of voltage stabilizing.
The kind of DC-DC power inverter is a lot.Whether to isolate point according to input/output circuitry, non-isolation type and the large class of isolated form two can be divided into.The DC-DC converter of non-isolation type can be divided into again buck, boost type, polarity inversion formula etc. several; The DC-DC converter of isolated form can be divided into again single-ended forward type, single-ended flyback, both-end half-bridge, both-end full-bridge etc. several.
Below be only the representative embodiment in the numerous embody rule scope of the present invention, protection scope of the present invention is not constituted any limitation.All technical schemes adopting conversion or equivalence to replace and formed, all drop within rights protection scope of the present invention.
Claims (6)
1. adopt intelligent audio, the video mix harvester of radio induction charging bracelet, it is characterized in that, comprising:
Voice collecting bracelet: for receiving the phonetic order be used for, comprises the Doppler's voice acquisition device for gathering voice signal and signal Doppler leading portion voice signal acquisition device;
Central processing unit: for the treatment of each equipment of cooperation control;
Video monitor unit: comprise the simulation camera be linked in sequence, video a/d converter, FPGA processor, dsp processor, described FPGA processor is connected with SRAM1 memory and SARM0 memory, dsp processor connects video a/d converter by I2C bus, and dsp processor is connected with memory device;
Described phonetic order collecting unit, video monitor unit are all connected with central processing unit;
Voice collecting bracelet comprises table body (1) and watchband (2-1,2-2), it is characterized in that: table body arranges inner chamber, the solar charging circuit being provided with wireless Mac circuit in inner chamber and powering for wireless Mac circuit,
Table body arranges inner chamber (1-5) and bonnet (3), and inner chamber (1-5) is divided into induction cavity (1-4-1) and circuit installation cavity (1-4-2), is provided with winding coil LO in induction cavity (1-4-1),
The inner solar charging circuit being provided with wireless Mac circuit and powering for wireless Mac circuit of circuit installation cavity (1-4-2);
Described table body (1) is provided with rectangular channel (1-1), and be provided with routing hole (1-2) in rectangular channel (1-1), solar charging circuit comprises solar energy electroplax, and solar energy electroplax is arranged in rectangular channel (1-1);
Described table body is provided with the MIC through hole (1-6) for installing microphone;
Described table body side surface is provided with a day line three-way hole (1-7).
2. intelligent audio, the video mix harvester of employing radio induction charging bracelet according to claim 1, is characterized in that: front end receiver device comprises,
Signal input circuit: for receiving radio signals, comprises the resonant circuit that coil T1 and trimming capacitor C A forms, and coil T1 comprises a winding and secondary winding, and one time winding two ends connect trimming capacitor C A;
Mixting circuit: the radio signal received is become intermediate frequency, comprises triode VT1, and the emitter oscillation signals according of triode VT1 to the signal madulation of the resonant circuit input of coil T1, trimming capacitor C A composition, can obtain intermediate-freuqncy signal at collector electrode;
Intermediate frequency amplifier circuit: intermediate frequency amplitude-modulated signal is amplified to the size required by detecting circuit;
Detecting circuit: the audio signal entrained by intermediate frequency amplitude-modulated signal taken off, gives preposition audio amplifier of loweing;
Preposition audio amplifier of loweing: detection audio signal is out carried out voltage amplification;
Power module: provide power supply, adopts electric capacity half-wave reduction voltage circuit.
3. intelligent audio, the video mix harvester of employing radio induction charging bracelet according to claim 2; it is characterized in that: described solar charging circuit comprises the solar energy electroplax, self-excited oscillation circuit, high frequency boosting unit, rectification circuit, pressure limiting circuit, the filter circuit that are linked in sequence; described high frequency boosting unit adopts high frequency transformer; high frequency transformer comprises coil N1 and the coil N2 of primary side, second siding ring N3; The coil N2 that self-excited oscillation circuit comprises triode Q1, the electronics R1 connected successively, resistance R3, electric capacity C2, electric capacity C2 connect high frequency transformer, the collector electrode wiring circle N1 of triode Q1, grounded emitter.
4. intelligent audio, the video mix harvester of employing radio induction charging bracelet according to claim 3; it is characterized in that: pressure limiting circuit comprises triode Q2, resistance R5, resistance R6, diode VD2; the collector electrode connecting resistance R1 of triode Q2 and the link of resistance R3; base stage is by the common port of diode VD2 connecting resistance R5 and resistance R6; wiring circle N3 two ends after resistance R5 connects with resistance R6, described filter unit comprises the electric capacity C3 of wiring circle N3 output; Described rectification circuit comprises diode D1, diode D1 wiring circle N3 positive output end.
5. the intelligent audio of employing radio induction charging bracelet according to claim 3, video mix harvester, it is characterized in that: wireless Mac circuit comprises resistance R7, electric capacity C4-C8, inductance L 1-L2, switch S 1, power supply, triode Q3, positive source connecting valve S1 first end, second end of switch S 1 passes through the base stage of electric capacity C4 connecting triode Q3, the base stage of triode Q3 connects biasing resistor R7, the other end of biasing resistor R7 connects power supply by switch S 1, the collector electrode of triode connects electric capacity C5, inductance L 1, electric capacity C6, electric capacity C5, the other end of inductance L 1 connects power supply by switch S 1, the emitter of the other end connecting triode Q3 of electric capacity C6, the emitter of triode is connected with microphone MIC, microphone MIC connects power cathode, electric capacity C8 is connected to both ends of power, the emitter of triode Q3 connects electric capacity C7, electric capacity C7 connects inductance L 2, inductance L 2 is connected with antenna.
6. intelligent audio, the video mix harvester of employing radio induction charging bracelet according to claim 1; it is characterized in that: described watchband (2-1; 2-2) comprise interior band (2-2), in addition (2-1); interior band (2-2) is provided with fixing hole (2-4), tyre is provided with the buckle (2-5) coordinated with fixing hole (2-4); Described table body (1) is provided with shift knob (1-8); Described induction cavity (1-4-1) and circuit installation cavity (1-4-2) are separated by rectangular clapboard (1-4); Described bonnet is provided with Ka Jiao (3-1), and positioning convex (3-2), table body (1) inner chamber (1-5) inwall is provided with and Ka Jiao (3-1), and the groove (1-3,1-3-1) that positioning convex (3-2) coordinates.
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Application publication date: 20151125 |