CN102756749A - Train anticollision system on basis of sound wave warning and anticollision method thereof - Google Patents
Train anticollision system on basis of sound wave warning and anticollision method thereof Download PDFInfo
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- CN102756749A CN102756749A CN2012102702724A CN201210270272A CN102756749A CN 102756749 A CN102756749 A CN 102756749A CN 2012102702724 A CN2012102702724 A CN 2012102702724A CN 201210270272 A CN201210270272 A CN 201210270272A CN 102756749 A CN102756749 A CN 102756749A
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Abstract
The invention relates to a train anticollision system on the basis of the sound wave warning and an anticollision method thereof, relates to the technical field of the rail transit and solves the technical problem of improving the safety of a train in a tunnel. The system comprises a plurality of sound wave warning units which are respectively arranged on each train; each sound wave warning unit comprises a sound wave receiving device arranged on a locomotive of the corresponding train, a sound wave transmitting device arranged on a tail of the corresponding train and signal control processing equipment; and a previous train transmits a sound wave warning signal consisting of sound waves with at least one frequency or frequency band to a next train and the next train receives the sound wave warning signal transmitted by the previous train and then estimates the distance between the previous train and the next train according to the attenuation and dispersion characteristics of the sound wave warning signal and timely carries out early warning. The system and the method which are provided by the invention are particularly suitable to apply in the urban subway line.
Description
Technical field
The present invention relates to the track traffic technology, particularly relate to a kind of train collision avoidance system of warning based on sound wave and the technology of avoiding collision thereof.
Background technology
The safe in operation of track train is concerning passenger's the security of the lives and property, also is simultaneously the prerequisite of the efficient operation of circuit.At present, comprise that the main train operation control of track train that the city rail hands over (Train Control System, TCS, or to the ATC system of subway line, i.e. Automatic Train Control system) guarantees the safe in operation of train.Yet; The serious track train collision case that takes place successively in recent years shows; When make great efforts improving train operation control and management technique, develop a kind of independently, the vehicle-mounted collision avoidance system of actv. and method for the safety of raising train operation be necessity with useful.
At present, countries in the world all in the research of actively developing the train anti-collision technique that this type can work alone, comprise satellite positioning, image recognition, radiocommunication and reply technological means such as range finding, electromagnetic wave collision avoidance radar.But; For subway train, because most of circuit is underground, the effect of existing train anti-collision technique in the tunnel is not good; Especially be difficult to effectively to improve the driving safety of train in non-straight length in apart from the tunnel, can not well avoid the train collision case to take place.With the electromagnetic wave collision avoidance radar is example, in the tunnel, because the influence of inner facility and the restriction in space; The high-frequency electromagnetic wave attenuation is very fast; Echo is complicated, and subway line has the heave and set gradient and a large amount of bends; There is the visual blind area that chaufeur has little time to brake when much dangerous situation taking place, thereby in the tunnel, is difficult to effectively play a role.
Summary of the invention
To the defective that exists in the above-mentioned prior art, technical matters to be solved by this invention provides a kind of train collision avoidance system and avoiding collision thereof of warning based on sound wave that can improve the driving safety of train in the tunnel.
In order to solve the problems of the technologies described above; A kind of train collision avoidance system of warning provided by the present invention based on sound wave; Relate to the train traffic network that includes many trains; It is characterized in that: comprise with the train traffic network in the consistent a plurality of sound waves of the train quantity unit of warning, each sound wave corresponding train in unit of warning;
Said sound wave warn the unit comprise one be used to launch sound wave acoustic emission apparatus, the sound wave receiving device, the signal control treatment facility, that are used to the receive sound wave terminal of warning;
Said acoustic emission apparatus is provided with the signal input part of warning, and said sound wave receiving device is provided with the signal output part of warning, and the said terminal of warning is provided with the signal input part of warning;
Said signal control treatment facility is provided with the signal output part of warning, the signal input part of warning, early warning signal mouth; And be built-in with the output signal that is used to control its each signal output part; And the signal processing module of the incoming signal of its signal input part of warning of Treatment Analysis; Its signal output of warning terminates to the signal input part of warning of acoustic emission apparatus; Its signal input part of warning is received the signal output part of warning of sound wave receiving device, and its early warning signal mouth is received the signal input part of warning at the terminal of warning;
Each sound wave unit of warning is installed on the corresponding train, and sound wave receiving device wherein is installed in the headstock of corresponding train, and acoustic emission apparatus then is installed in the tailstock of corresponding train.
Further, the said terminal of warning is installed in the operator's compartment of corresponding train, and the terminal of warning is provided with the information generation part of warning.
Further, the early warning signal mouth of said signal control treatment facility inserts the brake system and/or the automatic operational protection system of corresponding train.
Further; The said sound wave unit of warning also comprises a power equipment supply; Be built-in with uninterrupted power supply (UPS) in the said power equipment supply; The power input of said uninterrupted power supply (UPS) is received the power supply mouth of corresponding train, and its feeder ear is received acoustic emission apparatus, sound wave receiving device, the power input of terminal and signal control treatment facility of warning.
Further; Said acoustic emission apparatus comprises power amplifier and at least one loud speaker; The source signal input end of said power amplifier constitutes the signal input part of warning of acoustic emission apparatus, and the amplifying signal mouth of power amplifier is received the electric signal input end of each loud speaker.
Further, said loud speaker is a kind of in dynamic loud speaker, electrostatic loudspeaker, magnetic loudspeaker, piezo-electric loudspeaker, the pneumatic type loud speaker, or multiple combination wherein.
Further; Said sound wave receiving device comprises preamplifier, signal conditioner and at least one microphone; The conditioned signal mouth of said signal conditioner constitutes the signal output part of warning of sound wave receiving device; The amplifying signal mouth of said preamplifier is received the source signal input end of signal conditioner, and the source signal input end of preamplifier is received the electrical signal of each microphone respectively.
Further, said microphone is a kind of in capacitor microphone, piezoelectric microphone, dynamical microphone, the electret microphone, or multiple combination wherein.
The avoiding collision of train collision avoidance system of warning based on sound wave provided by the present invention is characterized in that:
Each train all utilizes acoustic emission apparatus to the train rear emission sound wave signal of warning, and the said sound wave signal of warning is the monofrequency acoustic signals, or the multi-frequency acoustic signals that is combined by a plurality of sound waves of different frequencies;
Each train all utilizes the sound wave receiving device to receive the place ahead train emitting sound wave signal of warning; And the sound wave of the receiving signal of warning carried out analysis and judgement; If judging the sound wave of the receiving signal of warning is sent by front truck; Promptly, utilize the signal control treatment facility to estimate the spacing between Ben Che and the place ahead train, judge that more whether spacing between this car and the front truck is less than safety distance according to the warn propagation characteristic of the sound wave in the signal of the sound wave received;
If judge spacing between Ben Che and the front truck less than safety distance, the signal control treatment facility is promptly to the terminal output early warning signal of warning of this car.
Further; If judge spacing between Ben Che and the front truck less than safety distance; The signal control treatment facility is promptly exported speed-slackening signal to the brake system of this car; Make the brake system of this car implement brake operating, or export restricting signal, make the protection system of this car implement the speed limit operation this car to the protection system of this car to this car.
Further, estimating the sound wave propagation characteristic of spacing institute foundation between this car and the place ahead train, is the warn decay characteristics and/or the dispersion characteristic of the sound wave in the signal of sound wave.
Train collision avoidance system and avoiding collision thereof of warning provided by the invention based on sound wave; Adopt sound wave to monitor the spacing between the car of front and back; Do not rely on relevant device and systems such as existing signal, communication; Have very strong independence and reliability, both can play under normal operation or emergency rating that long distance is warned, the Anti-bumping protection effect, thereby reduce risk of collision and the loss of train in the tunnel; Also can independently realize movable block (Moving Block) mechanism of train to a certain extent; Tunnel line is guaranteed that efficiency of operation provides actual help under normal operation or degradation situation, existing relatively train anti-collision technique has low, simple and reliable, the compatible good advantage of application cost; System and device is vehicle-mounted fully thereby need do extra construction and maintenance to circuit hardly, and electric power, signal and the communication system of existing line do not produced interference, and personnel are not had any injury, is particularly suitable in the city underground circuit, using.
Description of drawings
The structural representation of Fig. 1 train collision avoidance system that to be the embodiment of the invention warn based on sound wave;
The warn structural representation of unit of sound wave in Fig. 2 train collision avoidance system that to be the embodiment of the invention warn based on sound wave;
The avoiding collision diagram of circuit of Fig. 3 train collision avoidance system that to be the embodiment of the invention warn based on sound wave.
The specific embodiment
Below in conjunction with description of drawings embodiments of the invention are described in further detail, but present embodiment is not limited to the present invention, every employing analog structure of the present invention and similar variation thereof all should be listed protection scope of the present invention in.
Like Fig. 1-shown in Figure 2; A kind of train collision avoidance system of warning that the embodiment of the invention provided based on sound wave; Relate to the train traffic network that includes many trains 1; It is characterized in that: comprise with the train traffic network in the consistent a plurality of sound waves of the train 1 quantity unit of warning, each sound wave corresponding train 1 in unit of warning;
Said sound wave warn the unit comprise one be used to launch sound wave acoustic emission apparatus 2, the sound wave receiving device 3, the signal control treatment facility 4, that are used to the to receive sound wave terminal 5 of warning;
Each sound wave unit of warning is installed on the corresponding train, and sound wave receiving device 3 wherein is installed in the headstock of corresponding train 1,2 tailstock that are installed in corresponding train 1 of acoustic emission apparatus.
As shown in Figure 2, said acoustic emission apparatus is provided with the signal input part of warning, and said sound wave receiving device is provided with the signal output part of warning, and the said terminal of warning is provided with the signal input part of warning;
Said signal control treatment facility is provided with the signal output part of warning, the signal input part of warning, early warning signal mouth; And be built-in with the output signal that is used to control its each signal output part; And the signal processing module of the incoming signal of its signal input part of warning of Treatment Analysis; Its signal output of warning terminates to the signal input part of warning of acoustic emission apparatus; Its signal input part of warning is received the signal output part of warning of sound wave receiving device, and its early warning signal mouth is received the signal input part of warning at the terminal of warning;
In the embodiment of the invention, the said terminal of warning is installed in the operator's compartment of corresponding train, and the terminal of warning is provided with the information generation part of warning.
The said information generation part of warning comprises the sound generation part (like buzzer phone) of warning, warn light generation part (like telltale lamp), the read-out of warning, and the sound generation part of warning at the terminal of warning, the light generation part of warning, the read-out of warning are respectively received the signal input part of warning at the terminal of warning through the circuit of warning;
In the embodiment of the invention, the early warning signal mouth of said signal control treatment facility inserts the brake system and/or the automatic operational protection system of corresponding train.
In the embodiment of the invention; The said sound wave unit of warning also comprises a power equipment supply; Be built-in with uninterrupted power supply (ups) Unity in the said power equipment supply; The power input of said uninterrupted power supply (UPS) is received the power supply mouth of corresponding train, and its feeder ear is received acoustic emission apparatus, sound wave receiving device, the power input of terminal and signal control treatment facility of warning.
In the embodiment of the invention; Said acoustic emission apparatus is a prior art; Comprise power amplifier and at least one loud speaker, the source signal input end of said power amplifier constitutes the signal input part of warning of acoustic emission apparatus, and the amplifying signal mouth of power amplifier is received the electric signal input end of each loud speaker; Said loud speaker is a kind of in dynamic loud speaker, electrostatic loudspeaker, magnetic loudspeaker, piezo-electric loudspeaker, the pneumatic type loud speaker; Or multiple combination wherein, the quantity of loud speaker can be arranged in loudspeaker array with each loud speaker during more than one.
In the embodiment of the invention; Said sound wave receiving device is a prior art; Comprise preamplifier, signal conditioner and at least one microphone; The conditioned signal mouth of said signal conditioner constitutes the signal output part of warning of sound wave receiving device, and the amplifying signal mouth of said preamplifier is received the source signal input end of signal conditioner, and the source signal input end of preamplifier is received the electrical signal of each microphone respectively; Said microphone is a kind of in capacitor microphone, piezoelectric microphone, dynamical microphone, the electret microphone, or multiple combination wherein.
In the embodiment of the invention, said signal control treatment facility is a micro controller system, and the circuit of warning in the said terminal of warning is a prior art.
As shown in Figure 3, the avoiding collision of the train collision avoidance system that the embodiment of the invention provided warns based on sound wave is characterized in that:
The acoustic emission apparatus that each train all utilizes the signal control treatment facility control tailstock is to the train rear emission sound wave signal of warning; The said sound wave signal of warning is the monofrequency sound wave; Or the multi-frequency sound wave that combines by a plurality of sound waves of different frequencies; The sound wave signal of warning can be launched with intermittent mode, also can launch with continuation mode;
Each train all utilizes the sound wave receiving device to receive the place ahead train emitting sound wave signal of warning; And receiving that the place ahead train emitting sound wave warns behind the signal; Be input to the signal control treatment facility and carry out analysis and judgement; If judging the sound wave of the receiving signal of warning is sent by front truck; Promptly, utilize the signal control treatment facility to estimate the spacing between Ben Che and the place ahead train, judge that more whether spacing between this car and the front truck is less than safety distance according to the warn propagation characteristic of the sound wave in the signal of the sound wave received;
If the spacing between this car that calculates and the front truck is less than the safety distance threshold value; Promptly judge spacing between this car and the front truck less than safety distance, the signal control treatment facility promptly to the terminal output early warning signal of warning of this car, makes the terminal of warning send the information of warning; And to the brake system of this car output speed-slackening signal; Make the brake system of this car implement brake operating, or export restricting signal, make the protection system of this car implement the speed limit operation this car to the protection system of this car to this car;
Said safety distance threshold value is by the predefined fixed value of signal control treatment facility, or advances the variate-value that speed calculation is come out by the signal control treatment facility according to predefined fixed value and this garage;
The said information of warning comprises the sound of warning (like the buzzer of buzzer phone), the light of warning (like the telltale lamp flicker), the literal of warning and/or the pattern of warning.
In the embodiment of the invention, estimating the sound wave propagation characteristic of spacing institute foundation between this car and the place ahead train, is the warn decay characteristics and/or the dispersion characteristic of the sound wave in the signal of sound wave;
Signal is the monofrequency sound wave if sound wave is warned; Then decay characteristics and/or the dispersion characteristic according to this monofrequency sound wave directly estimates the spacing between Ben Che and the place ahead train; Such as the sound wave signal of warning is the monofrequency sound wave of frequency values in the 800Hz-1600Hz scope; On each train all the warn initial magnitude of signal of pre-set sound wave so that calculate the warn pad value of signal of the sound wave that receives, train receives sound wave and warns behind the signal; Judge that this signal compares initial magnitude average attenuation amplitude greater than 25dB, assert that promptly spacing between this car and the front truck is less than the safety distance threshold value;
Signal is the multi-frequency sound wave that is combined by a plurality of sound waves of different frequencies if sound wave is warned; Then according to the warn propagation characteristic difference of each different frequency sound wave in the signal of sound wave; Characteristics such as the frequency values through each different frequency sound wave in the signal that sound wave is warned, amplitude, chromatic dispersion compare analysis; Variation characteristic mapping (Mapping) relation of characteristics such as the amplitude through distance and acoustical signal, chromatic dispersion; Calculate the spacing between Ben Che and the place ahead train, warn signal by the monofrequency sound wave of a frequency values in the 800Hz-1600Hz scope, and the monofrequency sound wave of a frequency values in the 8kHz-12kHz scope formed such as sound wave; Train receives sound wave and warns behind the signal; Because two monofrequency acoustic wave frequency values that sound wave is warned in the signal differ bigger, both propagation characteristics also have than big-difference, and making train receive warn attenuation amplitude, the dispersion characteristic of two monofrequency sound waves in the signal of sound wave also has bigger difference; Attenuation amplitude, dispersion characteristic through two monofrequency sound waves in the signal that sound wave is warned compare analysis; Variation characteristic mapping (Mapping) relation of characteristics such as the amplitude through distance and acoustical signal, chromatic dispersion can calculate the spacing between Ben Che and the place ahead train, and its design accuracy is greater than the sound wave of being made up of the single monofrequency sound wave signal of warning;
In the embodiment of the invention, said sound wave is warned, and each sound wave can be the infrasound signal of frequency less than 20Hz in the signal, also can be the audio frequency sound signal of 20Hz-20kHz, also can be the above ultrasonic signal of 20kHz.
Because the propagation speed of sound wave surpasses per hour 1200 kilometers; Running velocity much larger than general train; And the air sound wave transmit and receive fairly simplely, relevant device is ripe, reliable, cheap, train forms preset safety distance before and after can easily guaranteeing; Not only simply but also reliable, had good value of service and application prospect.
Claims (11)
1. train collision avoidance system of warning based on sound wave; Relate to the train traffic network that includes many trains; It is characterized in that: comprise with the train traffic network in the consistent a plurality of sound waves of the train quantity unit of warning, each sound wave corresponding train in unit of warning;
Said sound wave warn the unit comprise one be used to launch sound wave acoustic emission apparatus, the sound wave receiving device, the signal control treatment facility, that are used to the receive sound wave terminal of warning;
Said acoustic emission apparatus is provided with the signal input part of warning, and said sound wave receiving device is provided with the signal output part of warning, and the said terminal of warning is provided with the signal input part of warning;
Said signal control treatment facility is provided with the signal output part of warning, the signal input part of warning, early warning signal mouth; And be built-in with the output signal that is used to control its each signal output part; And the signal processing module of the incoming signal of its signal input part of warning of Treatment Analysis; Its signal output of warning terminates to the signal input part of warning of acoustic emission apparatus; Its signal input part of warning is received the signal output part of warning of sound wave receiving device, and its early warning signal mouth is received the signal input part of warning at the terminal of warning;
Each sound wave unit of warning is installed on the corresponding train, and sound wave receiving device wherein is installed in the headstock of corresponding train, and acoustic emission apparatus then is installed in the tailstock of corresponding train.
2. train collision avoidance system of warning based on sound wave according to claim 1 is characterized in that: the said terminal of warning is installed in the operator's compartment of corresponding train, and the terminal of warning is provided with the information generation part of warning.
3. train collision avoidance system of warning based on sound wave according to claim 1 is characterized in that: the early warning signal mouth of said signal control treatment facility inserts the brake system and/or the automatic operational protection system of corresponding train.
4. train collision avoidance system of warning according to claim 1 based on sound wave; It is characterized in that: the said sound wave unit of warning also comprises a power equipment supply; Be built-in with uninterrupted power supply (UPS) in the said power equipment supply; The power input of said uninterrupted power supply (UPS) is received the power supply mouth of corresponding train, and its feeder ear is received acoustic emission apparatus, sound wave receiving device, the power input of terminal and signal control treatment facility of warning.
5. train collision avoidance system of warning according to claim 1 based on sound wave; It is characterized in that: said acoustic emission apparatus comprises power amplifier and at least one loud speaker; The source signal input end of said power amplifier constitutes the signal input part of warning of acoustic emission apparatus, and the amplifying signal mouth of power amplifier is received the electric signal input end of each loud speaker.
6. train collision avoidance system of warning according to claim 5 based on sound wave; It is characterized in that: said loud speaker is a kind of in dynamic loud speaker, electrostatic loudspeaker, magnetic loudspeaker, piezo-electric loudspeaker, the pneumatic type loud speaker, or multiple combination wherein.
7. train collision avoidance system of warning according to claim 1 based on sound wave; It is characterized in that: said sound wave receiving device comprises preamplifier, signal conditioner and at least one microphone; The conditioned signal mouth of said signal conditioner constitutes the signal output part of warning of sound wave receiving device; The amplifying signal mouth of said preamplifier is received the source signal input end of signal conditioner, and the source signal input end of preamplifier is received the electrical signal of each microphone respectively.
8. train collision avoidance system of warning based on sound wave according to claim 7 is characterized in that: said microphone is a kind of in capacitor microphone, piezoelectric microphone, dynamical microphone, the electret microphone, or multiple combination wherein.
9. the avoiding collision of train collision avoidance system of warning based on sound wave according to claim 1 is characterized in that:
Each train all utilizes acoustic emission apparatus to the train rear emission sound wave signal of warning, and the said sound wave signal of warning is the monofrequency acoustic signals, or the multi-frequency acoustic signals that is combined by a plurality of sound waves of different frequencies;
Each train all utilizes the sound wave receiving device to receive the place ahead train emitting sound wave signal of warning; And the sound wave of the receiving signal of warning carried out analysis and judgement; If judging the sound wave of the receiving signal of warning is sent by front truck; Promptly, utilize the signal control treatment facility to estimate the spacing between Ben Che and the place ahead train, judge that more whether spacing between this car and the front truck is less than safety distance according to the warn propagation characteristic of the sound wave in the signal of the sound wave received;
If judge spacing between Ben Che and the front truck less than safety distance, the signal control treatment facility is promptly to the terminal output early warning signal of warning of this car.
10. the avoiding collision of train collision avoidance system of warning based on sound wave according to claim 9; It is characterized in that: if judge spacing between Ben Che and the front truck less than safety distance; The signal control treatment facility is promptly exported speed-slackening signal to the brake system of this car; Make the brake system of this car implement brake operating, or export restricting signal, make the protection system of this car implement the speed limit operation this car to the protection system of this car to this car.
11. the avoiding collision of train collision avoidance system of warning based on sound wave according to claim 9; It is characterized in that: estimating the sound wave propagation characteristic of spacing institute foundation between this car and the place ahead train, is the warn decay characteristics and/or the dispersion characteristic of the sound wave in the signal of sound wave.
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| CN2012102702724A CN102756749A (en) | 2012-07-31 | 2012-07-31 | Train anticollision system on basis of sound wave warning and anticollision method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110077413A (en) * | 2019-03-29 | 2019-08-02 | 福建省汽车工业集团云度新能源汽车股份有限公司 | A kind of method and system based on positioning signal control vehicle drive |
| CN112793565A (en) * | 2021-01-06 | 2021-05-14 | 恒大新能源汽车投资控股集团有限公司 | Backward collision alarm system, method and device and vehicle |
| CN112810665A (en) * | 2021-01-13 | 2021-05-18 | 浙江众合科技股份有限公司 | High-low frequency combined ranging system and method for rail transit train |
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Effective date of registration: 20131022 Address after: 200000 Shanghai city Pudong New Area Hartcourt Road No. 99 Applicant after: Shanghai Advanced Research Institute, Chinese Academy of Sciences Applicant after: Institute of acoustics, Chinese Academy of Sciences Address before: 200000 Shanghai Zhangjiang High Tech Park of Pudong New Area Hartcourt Road No. 99 Applicant before: Shanghai Zhongke Institute for Advanced Study Applicant before: Institute of acoustics, Chinese Academy of Sciences |
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Application publication date: 20121031 |