A kind of traffic accident noise measuring based on sound transducer and alignment systemTechnical field
The present invention relates to a kind of vehicle impact detection system, particularly relate to the inspection of a kind of traffic accident noise based on sound transducerSurvey and alignment system, belong to vehicle Automatic Measurement Technique field.
Background technology
Guarantee the safety of driver and passenger when automobile generation accident collision to greatest extent, be that auto industry is pursuedOne of target.Show according to the statistical data of China's Ministry of Public Health, in 1000 example vehicle accident the wounded, the wounded's energy of only 14.3%Ride in ambulances arrival hospital in time.Road traffic accident shows, if using emergency management and rescue in vehicle accident occurs 5 minMeasure, uses emergency treatment, heavy the wounded of 18%～25% at least can be made to avoid death in 30 mm；It addition, in China's traffic deathIn about 40% the wounded be to die instantly, remaining 60% be die from hospital or be sent to hospital way in, wherein the wounded of 30% isBecause rescuing dead not in time.Along with going deep into of automotive safety research, use be gradually improved automobile collision protection system (asAir bag etc.) Traffic Accident Mortality can be effectively reduced, but also all kinds of corrupt practices creep in simultaneously, tends to occur traffic accident can not send timelyGo out to support, rescue accident timely.
According to statistics, China's automobile pollution is less than the whole world 2%, but the average annual toll on traffic of China is about 10Ten thousand people, account for the 20% of global traffic death by accident sum.For many years, owing to China's automobile pollution increases swift and violent, so every yearToll on traffic the most constantly creates new peak.According to the statistics of the Ministry of Public Security, 2002, China ten thousand car death toll was13.7 people；And according to Nissan Motor technical staff's introduction, this numeral is more than 10 times of Japan.At present, China's motor vehicles is possessedAmount reaches 2.64 hundred million, wherein 1.54 hundred million, automobile；Vehicle driver breaks through 300,000,000 people, and wherein motorist is more than 2.46 hundred millionPeople.Adding up according to hygiene department, the death toll caused because of vehicle accident by 2012 has reached 160,000 people.
Chinese transportation death tolls remains high, and reason is numerous.The participant of " 2005 automotive safety forum " begs forBy thinking its main cause: one is domestic chaotic current situation of traffic, the most often car to car impact, and the probability of people is little, and domestic warpBeing often that car is thrusted into, the probability of people is much bigger；Two be state one skilled in the art, driver traffic safety consciousness the thinnest, consciousThat observes traffic rules and regulations is few；Three is that many home-made machine motor-cars exist gap with foreign vehicle in terms of security performance；Four is stateInterior a lot of drivers do not form correct driving habits, the operational approach that no grasp accident is correct before and after occurring；Five is domesticRoad-based infrastructure in design planning, also have certain gap with developed country.
The most also a few money is had to be applied to car collision avoidance System, such as: the bodyguard that drives, Mobileye intelligent travelling craneEarly warning system etc.；Some high-end cars are also provided with collision avoidance system, such as Volvo, benz etc..The principle of these systems is:Utilize vehicle-mounted camera or mobile phone camera to obtain the image of front truck in driving conditions, estimated by certain Algorithm Analysis imageMeter and the spacing of preceding vehicle, warn driver further according to the size of spacing.
But, these collision avoidance systems are all based on the early warning before traffic accident occurs and warning, for car after the occurrence of the traffic accidentMisfortune early warning does not has similar product at present with collision avoidance system.
Summary of the invention
The technical problem to be solved is that the deficiency for background technology provides one based on sound transducerTraffic accident noise measuring and alignment system.
The present invention solves above-mentioned technical problem by the following technical solutions:
A kind of traffic accident noise measuring based on sound transducer and alignment system, comprise the data acquisition and location arranged onboardModule, and the remote monitoring terminal being connected with data acquisition and locating module；Described data acquisition and locating module comprise soundSound sensor, data processing module, a/d converter, amplifier module, wireless communication module, locating module and power module, instituteState wireless communication module and comprise one-chip computer module and connected GPRS wireless communication module；Described amplifier module comprisesAmplifier chip, the first resistance, the second resistance, the 3rd resistance, the outfan of a/d converter connects the first resistance and second respectivelyOne end of resistance, the other end of the second resistance connects the positive pole of amplifier chip, the negative pole of amplifier chip and the 3rd resistance stringWith the other end ground connection of the first resistance after connection, the voltage output end of amplifier chip connects the input of data processing module, instituteStating sound transducer and pass sequentially through a/d converter, amplifier module connection data processing module, described data processing module passes throughOne-chip computer module connects GPRS wireless communication module, and described locating module is connected with data processing module, and described power module dividesIt is not connected with sound transducer, data processing module, a/d converter, amplifier module, wireless communication module and locating module.
As a kind of traffic accident noise measuring based on sound transducer of the present invention and the further preferred scheme of alignment system,Described remote monitoring terminal comprises micro controller module and difference connected display module, data reception module, dataMemory module, clock module and acousto-optic alarm module
As a kind of traffic accident noise measuring based on sound transducer of the present invention and the further preferred scheme of alignment system, describedThe chip model of sound transducer uses TLV320AIC23B.
As a kind of traffic accident noise measuring based on sound transducer of the present invention and the further preferred scheme of alignment system,Described data processing module uses the dsp chip TMS320V-C5509 that TI company produces.
As a kind of traffic accident noise measuring based on sound transducer of the present invention and the further preferred scheme of alignment system,Described locating module uses Big Dipper locating module.
As a kind of traffic accident noise measuring based on sound transducer of the present invention and the further preferred scheme of alignment system,The chip model of described a/d converter is TMS320LF240.
As a kind of traffic accident noise measuring based on sound transducer of the present invention and the further preferred scheme of alignment system,Described display module is LCD display.
The present invention uses above technical scheme compared with prior art, has following technical effect that
1, the present invention uses the noise that the collection vehicle that sound transducer can be real-time produces when colliding, the noise that will gather in timeParameter and the real-time transmission of positional information are to remote monitoring terminal, and remote monitoring terminal can obtain the ground that traffic accident occurs timelyPoint, it is possible to send support timely to, simultaneously to 120, programmed emergency etc. implement to call for help in time, prevent in meagrely-populated sectionThe injures and deaths brought not in time because of rescue；
2, the sound transducer that the present invention uses chip model to be TLV320AIC23B, it is a high-performance solid of TI companyAudio codecs chip, has 48kHz bandwidth, and the collection that can meet the acoustical signal including noise signal is wantedAsk, and through a/d converter and the pretreatment such as the analog digital conversion of amplifier module and processing and amplifying；
3, the data processing module of the present invention uses the dsp chip TMS320V-C5509 that TI company produces, and it is a cost performance16 high fixed DSPs, have multiple high performance computation unit, and system clock is 144MHz, and ordering calculation speed is up to1OOMMACS, and expansion interface on the sheet enriched is provided, and then can preferably carry out data process.
Accompanying drawing explanation
Fig. 1 is the structure principle chart of the present invention；
Fig. 2 is the structure principle chart of data acquisition of the present invention and locating module；
Fig. 3 is the structure principle chart of remote monitoring terminal of the present invention；
Fig. 4 is that the present invention is according to gathering and locating module amplifier module circuit diagram.
Detailed description of the invention
Below in conjunction with the accompanying drawings technical scheme is described in further detail:
As it is shown in figure 1, a kind of traffic accident noise measuring based on sound transducer and alignment system, comprise the data arranged onboardGather and locating module, and the remote monitoring terminal being connected with data acquisition and locating module；
As in figure 2 it is shown, described data acquisition and locating module comprise sound transducer, data processing module, a/d converter, amplificationDevice module, wireless communication module, locating module and power module, described wireless communication module comprise one-chip computer module and and itsThe GPRS wireless communication module connected；Described sound transducer passes sequentially through a/d converter, amplifier module connects data and processesModule, described data processing module is connected at GPRS wireless communication module, described locating module and data by one-chip computer moduleReason module connects, described power module respectively with sound transducer, data processing module, a/d converter, amplifier module, wirelessCommunication module and locating module connect.
Described sound transducer Real-time Collection vehicle sounds signal, the signal of telecommunication of sound transducer output is through a/d converter mouldAfter number conversion and the amplified circuit of amplifier module amplify, digital signal and then transmission to data processing module after conversion are carried outPretreatment, data processing module processes collected acoustic information in real time, it may be judged whether have vehicle collision accident to occur, ifHaving traffic accident to occur, what described locating module was real-time obtains positional information and the audio parameter of sound transducer collection that traffic accident occursTransmitted to remote monitoring terminal by wireless communication module；
As shown in Figure 4, described amplifier module comprises amplifier chip, the first resistance, the second resistance, the 3rd resistance, AD conversionThe outfan of device connects the first resistance and one end of the second resistance respectively, and the other end of the second resistance is just connecting amplifier chipPole, with the other end ground connection of the first resistance after the negative pole of amplifier chip and the 3rd resistant series, the voltage of amplifier chip is defeatedGo out end and connect the input of data processing module.
As it is shown on figure 3, described remote monitoring terminal comprise micro controller module and respectively connected display module,Data reception module, data memory module, clock module and acousto-optic alarm module, described micro controller module is according to data acquisitionAnd the audio parameter that gathers of the sound transducer of locating module and locating module real-time to obtain the positional information that traffic accident occurs realTime shown in real time by display module, what described data memory module was real-time will be according to gathering and the sound transducer of locating module be adoptedThe audio parameter of collection and locating module real-time obtain the real-time storage of positional information that traffic accident occurs, described clock module is real-timeRecord and receive and storage traffic accident noise parameter and the information parameter of traffic accident position.When getting into an accident, described sound and light alarm mouldBlock is used for sending alarm, can send support timely to by micro controller module simultaneously, simultaneously to 120, programmed emergency etc.Implement to call for help in time, prevent the injures and deaths brought not in time because of rescue in meagrely-populated section.
Described data processing module uses the dsp chip TMS320V-C5509 that TI company produces, and described locating module usesBig Dipper locating module, the chip model of described a/d converter is TMS320LF240, and described display module is LCD display.
Sound collection sensor uses condenser type sound transducer, and sample frequency is 30Hz～18kHz, due to vehicle noiseThe frequency of signal is typically not over 10kHz, so this sound transducer can well realize sampling.Sound transducer will gatherTo analogue signal send into amplifying circuit amplify after be sent to sound collection chip.
The chip of sound transducer uses TLV320AIC23B (being called for short AIC23), and it is that a high-performance of TI company is stoodBody audio codecs chip, has 48kHz bandwidth, and the collection that can meet the acoustical signal including noise signal is wantedAsk.The AIC23 analogue signal to collecting carries out stereophony A/D conversion, can be under the sample rate of 8kHz-96kHzThe sampled data of 16bit, 20bit, 24bit and 32bit is provided.Outside acoustical signal is gathered by native system with 32kHz sample frequency,32000 voice datas of collection per second, and the length gathering data is set to analogue signal change after 16bit, such A/D conversionBecome the digital signal of 16.After analogue signal is converted into digital signal, AIC23 transfers data to data processing module,Make next step for data processing module to process.The MODE pin of AIC23 is set to O by the present invention, controls interface and is set to I2C'sWorking method, AIC23 uses DSP mode with the data transmission interface of data processing module.So data processing module is justAIC23 collaborative work can be controlled, and receive the data that AIC23 collects.
Data processing module: data processing module is the core of whole system, completes the collection of audio signal, controls, depositsStorage, process and with the function such as extraneous communication.Select is that the dsp chip TMS320V-C5509 that TI company produces (is called for shortVC5509), it is 16 fixed DSPs that a cost performance is high, has multiple high performance computation unit, and system clock is144MHz, ordering calculation speed is up to 1OOMMACS, and provides expansion interface on the sheet enriched.
VC5509 has two multichannel buffer serial port (McBSP), and McBSP has the base identical with standard serial interfaceThis function, and on the basis of standard serial interface, function is extended.The voice collecting chip that native system usesAIC23 is just connected by McBSP with DSP.Wherein CLKX is tranmitting data register, and CLKR is for receiving clock, and they are all with AIC23'sSystem clock BCLK is connected.FSX and FSR realizes the frame synchronization sending and receiving, LRCIN and the LRCOUT pin of corresponding A IC23.Data send pin DX and are connected with DIN and DOUT of AIC23 respectively with data receiver pin DR, complete serial data and send and connectBring drill to an end work.
In sum, the present invention uses the noise that the collection vehicle that sound transducer can be real-time produces when colliding, in timeTransmission real-time to the noise parameter gathered and positional information can be obtained timely to remote monitoring terminal, remote monitoring terminalThe place that traffic accident occurs, it is possible to send support timely to, simultaneously to 120, programmed emergency etc. implement to call for help in time, prevent peopleThe injures and deaths that the section of cigarette rareness is brought not in time because of rescue；The sound sensor that the present invention uses chip model to be TLV320AIC23BDevice, it is a high-performance stereo audio codec chip of TI company, has 48kHz bandwidth, can meet and include making an uproarAcoustical signal is in the collection requirement of interior acoustical signal, and at a/d converter and the analog digital conversion of amplifier module and amplificationThe pretreatment such as reason；The data processing module of the present invention uses the dsp chip TMS320V-C5509 that TI company produces, and it is a16 fixed DSPs that cost performance is high, have multiple high performance computation unit, and system clock is 144MHz, ordering calculation speedUp to 1OOMMACS, and expansion interface on the sheet enriched is provided, and then can preferably carry out data process.
It is understood that unless otherwise defined, all terms used herein (include skill to those skilled in the art of the present techniqueArt term and scientific terminology) have with the those of ordinary skill in art of the present invention be commonly understood by identical meaning.AlsoIt should be understood that those terms defined in such as general dictionary should be understood that have with in the context of prior artThe consistent meaning of meaning, and unless defined as here, will not explain by idealization or the most formal implication.
Above example is only the technological thought that the present invention is described, it is impossible to limit protection scope of the present invention with this, everyThe technological thought proposed according to the present invention, any change done on the basis of technical scheme, each fall within scopeWithin.Above in conjunction with accompanying drawing, embodiments of the present invention are explained in detail, but the present invention is not limited to above-mentioned embodiment partyFormula, in the ken that those of ordinary skill in the art are possessed, it is also possible to do on the premise of or else departing from present inventive conceptGo out various change.