CN101214822B - Accident early warning and anti-collision system for train - Google Patents

Accident early warning and anti-collision system for train Download PDF

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Publication number
CN101214822B
CN101214822B CN2008100692632A CN200810069263A CN101214822B CN 101214822 B CN101214822 B CN 101214822B CN 2008100692632 A CN2008100692632 A CN 2008100692632A CN 200810069263 A CN200810069263 A CN 200810069263A CN 101214822 B CN101214822 B CN 101214822B
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car
signal
main car
main
guide
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CN101214822A (en
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曾昭南
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Abstract

The invention discloses a train accident warning and anticollision system, which comprises a main vehicle. The main vehicle is equipped with an indicator light. The invention is characterized in that the invention also comprises a leading vehicle, and the main vehicle and the leading vehicle are equipped with a wireless communication system. The leading vehicle is positioned at the front of the leading vehicle and the two vehicles maintain sufficient safety distance. The main vehicle and the leading vehicle transfer information via the wireless communication system. Once the leading vehicle detects collision information, the leading vehicle transfers the information to the main vehicle immediately, and the indicator light of the main vehicle turns on for warning and the system takes the train stopping measure immediately. The system has the advantages of easy realization, wide application, no effect from weather, and greatly promoting the reliability of accident prevention.

Description

Train accident early warning and collision avoidance system
Technical field
The invention belongs to a kind of accident early warning collision avoidance system, relate in particular to a kind of train accident early warning and collision avoidance system that is applicable to tracks such as railway, magnetic suspension or pipeline communications and transportation mode.
Background technology
As everyone knows, in the rail transport mode, the train in the high-speed cruising is how effectively crashproof to be a difficult problem always.In existing safety control system; Common avoiding collision has: shock absorber is installed at the train two ends, modes such as retaining wall, the computing machine that passes through networking and communication system remote control train operation are installed in the line terminal; These methods are because limitation separately all fails fundamentally to resolve this problem.Particularly along with technological advance; With the magnetic suspension train is the Modern High-Speed train running speed rapid growth of representative; The car accident consequence that it caused is heavy more, and in face of the huge kinetic energy that forms multiplication length along with train speed raising, it is unable to do what one wishes that traditional avoiding collision seems further.Receive the influence of this problem just, magnetic suspension train can only reach per hour more than 400 kilometer up to more than 600 kilometer test speed per hour in actual operation, receive very big restriction.
The defective of prior art is: not can solve the car accident of the train in the high-speed cruising, and running velocity is fast more, its crashproof more difficult prevention.
Summary of the invention
The objective of the invention is to propose a kind of train accident early warning and collision avoidance system that can prevent train to collide safely and effectively, especially can when high-speed cruising, prevent train to collide, moving velocity is fast more, and the hedging effect is big more.
Concrete scheme of the present invention is: a kind of train accident early warning and collision avoidance system; Comprise main car; On the said main car indicator lamp is installed; Its key is: also include preceding guide-car, on said main car and the preceding guide-car wireless telecommunication system is installed also, said main car and preceding guide-car transmit information through said wireless telecommunication system;
Said leading parking stall keeps a safe distance with said main car in said main car front; Should crash sensor be installed preceding guide-car's front end, this crash sensor sends collision alarm to said wireless telecommunication system, and sends this collision alarm to said main car through this wireless telecommunication system.
Said wireless telecommunication system is made up of sendaisle and receiving cable; Said sendaisle is made up of A/D conversion chip, main control module, MOD and antenna modular converter; Said A/D conversion chip input end ANALOG receives signal; After carrying out analogue to digital conversion, give said main control module by mouth D1, D2, D3, D4, D5, D6, D7, D8 output digital signal, this main control module to digital signal processing after; Give said MOD and carry out modulation treatment, after the antenna modular converter sends signal; Said receiving cable is made up of D/A conversion chip, demoder; After said antenna modular converter receives signal; Said demoder carries out demodulation to received signal, sends restituted signal and gives said main control module, after said main control module is handled it; Give input end DI0, DI1, DI2, DI3, DI4, DI5, DI6, the DI7 of said D/A conversion chip with signal, digital to analogy conversion is after said D/A conversion chip mouth IOUT1 and IOUT2 output.
Said wireless telecommunication system can adopt global system for mobile communications, and (Global System for MobileCommunications GSM), utilizes existing resource, can practice thrift cost.
Receiving cable on the said main car receives normal signal or the collision warning signal that said preceding guide-car sends; This signal drives said indicator lamp; Make it shinny, the sendaisle guide-car before said on the said main car sends stop signal, notifies said leading car owner's car to stop; Receiving cable sendaisle before said on the guide-car receives the stop signal that said main car sends, and sendaisle sends normal signal or collision warning signal to said main car.
The guide-car also can break away from said main car as the road detection vehicle isolated operation before said.
Be provided with main control computer in the said main car, this main control computer obtains the collision alarm that said wireless telecommunication system provides, and control signal sends, receives and other work.Only need the software of upgrading main control computer to get final product, need not do big change existing operation scheme and equipment.Said train accident early warning and collision avoidance system carry out initialization after starting, and main control computer is provided with in the said main car:
The device of guide-car's signal before being used to judge whether to receive;
If guide-car's signal before not receiving then gets into the device that is used for main car parking processing;
If guide-car's signal before receiving then gets into the device that is used to judge whether alerting signal;
If there is not alerting signal, then get into the bright device of green indicating lamp;
Get back to the said device that is used to judge whether to receive preceding guide-car's signal;
If alerting signal is arranged, then get into the bright device of red indicating light;
Be used for the device that main car stops and handles; The train attendant sees that red indicating light is bright, shows that the place ahead has an accident, and main car stops.
Be used for the device that guide-car forward sends stop signal.Notify leading car owner's car to stop.
Be provided with control computer in the guide-car before said, this control computer is obtained the collision alarm of said crash sensor, and control signal sends, receives and other work.Be provided with in this control computer:
Be used to judge whether the device of sensor input signal; Whether detect has collision alarm;
If there is not sensor input signal, then get into the device that is used for sending normal signal to main car;
Get back to the said device that is used to judge whether sensor input signal; Do not have abnormal condition, just continue the collision detection sensor signal;
If sensor input signal is arranged, then get into the device that is used for sending alerting signal to main car; Notify main car the place ahead to have an accident, main car should be adopted an effective measure;
Be used to judge whether to receive the device of main car stop signal; Whether detect main car stops;
If do not receive main car stop signal, then get into the said device that is used for sending alerting signal to main car; If main car does not stop, then continue to send alerting signal, notify main car to stop;
If receive main car stop signal, then entering is used to stop to send the device of alerting signal.
The shortest stopping distance of said enough safety distance during more than or equal to said main car emergency braking.So just can guarantee that said preceding guide-car is after said main car sends accident early warning; Main car can not with said before under guide-car's situation about bumping; In time take safety measures such as deceleration or emergency braking,, also can guarantee the safety of said main car even the guide-car meets accident before said.Guide-car and main garage cross in the journey before said, generally keep both speed identical, just can guarantee that both go by actv. in safety distance, and said main car owner's control computer also includes the speed of a motor vehicle and safety distance control part:
Be used to the device of judging whether main car stops;
If main car stops, then get into the device that is used to finish;
If main car does not stop, the guide-car sent the device of wheel revolutions before then entering was used for to main car;
Be used for the device that main car receives preceding guide-car's wheel revolutions signal;
Be used for main car and calculate the device that preceding guide-car has rolled distance away from;
Be used for main car and calculate the device that this car has rolled distance away from;
The safety distance that is used for requiring according to main car current driving speed calculation device;
The device of guide-car and main car actual pitch before being used to calculate;
Be used to judge two following distances whether surpass current requirement safety distance device;
If do not surpass, then get into the said device of judging whether main car stops of being used to;
If surpass, then get into the device of the main car of adjustment and preceding guide-car's speed of a motor vehicle; Main car deceleration or preceding guide-car are given it the gun, meet the requirements of safety distance up to two following distances;
Get back to the said device of judging whether main car stops of being used to.
Said leading car owner is controlled module and is provided with input port connection pick up camera, gps satellite position fixing system, infrared ray and radar detector.Can be under the situation that does not receive the restriction of weather condition and other situation; Survey the place ahead road conditions, obstacle etc. in all directions and be an impediment to the situation that said main car goes; Said main car can in time take effective measures according to these situation, prevents the generation of accident as much as possible.
Said train accident early warning and collision avoidance system are identification and the data managements that realizes identity through SIM.Through SIM, accuracy, safety and the specificity just can guarantee information transmitted, have only the SIM of insertion after, said train accident early warning and collision avoidance system could normal operation.
The internal circuit of said A/D conversion chip is formed by dialling position switch, switch, reverse integral device, integrating capacitor, comparator, NAND gate, counting machine, timer and logic control door; Two free ends of said group of position switch, a termination is received the input voltage u of crash sensor i, the other end receives reference voltage-V REF, the fixed end of this group position switch connects the negative input of said reverse integral device, the positive input ground connection of this reverse integral device; The mouth of said reverse integral device outputs signal to the negative input of said comparator; Between the mouth of said reverse integral device and negative input and be connected to said integrating capacitor, this integrating capacitor and said switch in parallel, the positive input ground connection of said comparator; The mouth of this comparator connects an input end of said NAND gate; Another input end receive clock signal of this NAND gate, the mouth of said NAND gate connects the input end of said counting machine, and the mouth of this counting machine links to each other with the input end of said timer; The mouth of said timer connects the input end of said logic control door, said group of free-ended connection of position switch of this logic control gate control.
Said crash sensor when detecting collision and take place, u i＞0, when detecting the collisionless generation, u i=0.
New field of technical activity: said switch closure, treat said integrating capacitor discharge off, this switch breaks off, said counter O reset simultaneously.
Integration phase for the first time: said logic control door output low level, control said group of position switch, said reverse integral device begins integration, integral result u 0>=0 o'clock, said comparator was output as 0, integral result u 0＜0 o'clock, said comparator was output as 1, was that the clock pulse of T is imported said NAND gate with said comparator output result with the cycle, and this NAND gate output clock pulse drives said counting machine (COU) counting, through 2 uIndividual clock pulse, after said counting machine reaches full scale, said logic control door output high level, said group of position switch receives crash sensor input voltage u iFree end break off, another receives reference voltage-V REFFree end closed.Integration finishes for the first time, gets into integration phase for the second time.Whole first time integration phase, said reverse integral device output voltage
u o = - 1 τ ∫ 0 t u i dt
For the first time integration time t=T 1=2 nT c
When integration finishes for the first time, said reverse integral device output voltage
u p = - T 1 τ u i = - 2 n T c τ u i
Integration phase: reference voltage-V for the second time REFBe added to the negative input of said reverse integral device, as this reverse integral device output voltage u 0=0 o'clock, said comparator was output as 0, and said NAND gate input end is closed, and said counting machine stops counting.This stage said reverse integral device output voltage
u o ( t 2 ) = u p - 1 τ ∫ t 1 t 2 ( - V REF ) dt = 0
If T 2=t 2-t 1,
V REF T 2 τ = 2 n T c τ u i
Have
T 2 = 2 n T c V REF u i
Suppose that this hour counter displayed value is λ, then have
T 2＝λT c
So
λ = T 2 T c = 2 n V REF u i
Can find out the value λ of said counting machine demonstration and the input voltage u of the integration phase first time iBe directly proportional, can directly read input voltage u from said counting machine iValue.If u i＞V REF, then counting machine also just shows the full scale result.If get V REF=2 nV, then tested voltage u iJust equal the value that said counting machine shows.
The train attendant can understand the order of severity of said preceding guide-car's collision according to the size of said counting machine displayed value.
Remarkable result of the present invention is: the train generation car accident that can prevent high-speed cruising safely and effectively; And can realize services such as Road Detection, road conditions monitoring, satellite positioning; Actv. prevents the generation of various accidents, has ensured the safety of main car greatly, especially can when high-speed cruising, prevent train to collide; Moving velocity is fast more, and the hedging effect is big more.Because preceding guide-car's momentum is far smaller than main car, preceding guide-car knocks and is hit the degree of damage that degree of damage that thing causes also is far smaller than main car and is caused, and especially as far as live bodies such as pedestrian, animals, has reduced the injures and deaths degree greatly.
Description of drawings
Fig. 1 is a system architecture scheme drawing of the present invention;
Fig. 2 is receiving cable and sendaisle schematic diagram;
Fig. 3 is main control computer signal processing flow figure;
Fig. 4 is main car owner's control computer speed of a motor vehicle and safety distance control flow chart;
Fig. 5 is an A/D change-over circuit schematic diagram.
The specific embodiment
Below in conjunction with accompanying drawing and specific embodiment the present invention is done further explain.
As shown in Figure 1:
A kind of train accident early warning and collision avoidance system comprise main car 1, on the said main car 1 indicator lamp L are installed; Wherein, Guide-car 2 before also including also is equipped with wireless telecommunication system 3 on said main car 1 and the preceding guide-car 2, and said main car 1 and preceding guide-car 2 are through said wireless telecommunication system 3 transmission information;
Guide-car 2 is positioned at said main car 1 front before said, keeps a safe distance with said main car 1; Should crash sensor CR be installed preceding guide-car's 2 front ends, this crash sensor CR sends collision alarm to said wireless telecommunication system 3, and sends this collision alarm to said main car 1 through this wireless telecommunication system 3.
As shown in Figure 2:
Said wireless telecommunication system 3 is made up of sendaisle SC and receiving cable AC; Said sendaisle SC is made up of A/D conversion chip ADT, main control module CCT1, MOD MOD and antenna modular converter; Said A/D conversion chip ADT input end ANALOG receives signal; After carrying out analogue to digital conversion, give said main control module CCT by mouth D1, D2, D3, D4, D5, D6, D7, D8 output digital signal, this main control module CCT to digital signal processing after; Give said MOD MOD and carry out modulation treatment, after the antenna modular converter sends signal; Said receiving cable AC is made up of D/A conversion chip DAT, demoder DEM; After said antenna modular converter receives signal; Said demoder DEM carries out demodulation to received signal, sends restituted signal and gives said main control module CCT, after said main control module is handled it; Give input end DI0, DI1, DI2, DI3, DI4, DI5, DI6, the DI7 of said D/A conversion chip DAT with signal, digital to analogy conversion is after said D/A conversion chip DAT mouth IOUT1 and IOUT2 output.
The model of said A/D conversion chip ADT is TLC5510; The signal of said D/A conversion chip DAT is DAC0830, and said wireless telecommunication system 3 adopts global system for mobile communications Global System for MobileCommunications, GSM; Utilize existing resource, practice thrift cost.
Receiving cable AC on the said main car 1 receives normal signal or the collision warning signal that said preceding guide-car 2 sends; This signal drives said indicator lamp L; Make it shinny, the guide-car 2 before said of the sendaisle SC on the said main car 1 sends stop signal, notifies said preceding guide-car's 2 main cars 1 to stop; Receiving cable AC before said on the guide-car 2 receives the stop signal that said main car 1 sends, and sendaisle SC sends normal signal or collision warning signal to said main car 1.
Guide-car 2 also can break away from said main car 1 as the road detection vehicle isolated operation before said.
Be provided with main control computer in the said main car 1, this main control computer obtains the collision alarm that said wireless telecommunication system provides, and control signal sends, receives and other work.Only need the software of upgrading main control computer to get final product, need not do big change existing operation scheme and equipment.Said train accident early warning and collision avoidance system carry out initialization after starting.Said train accident early warning and collision avoidance system carry out initialization after starting.
As shown in Figure 3: main control computer is provided with in the said main car 1:
The device of guide-car's signal before being used to judge whether to receive;
If guide-car's signal before not receiving then gets into the device that is used for main car parking processing;
If guide-car's signal before receiving then gets into the device that is used to judge whether alerting signal;
If there is not alerting signal, then get into the bright device of green indicating lamp;
Get back to the said device that is used to judge whether to receive preceding guide-car's signal;
If alerting signal is arranged, then get into the bright device of red indicating light;
Be used for the device that main car stops and handles; The train attendant sees that red indicating light is bright, shows that the place ahead has an accident, and main car stops.
Be used for the device that guide-car forward sends stop signal.Notify leading car owner's car to stop.
Be provided with control computer in the guide-car 2 before said, this control computer is obtained the collision alarm of said crash sensor CR, and control signal sends, receives and other work.
As shown in Figure 3: as to be provided with in this control computer:
Be used to judge whether the device of sensor input signal; Whether detect has collision alarm;
If there is not sensor input signal, then get into the device that is used for sending normal signal to main car;
Get back to the said device that is used to judge whether sensor input signal; Do not have abnormal condition, just continue the collision detection sensor signal;
If sensor input signal is arranged, then get into the device that is used for sending alerting signal to main car; Notify main car the place ahead to have an accident, main car should be adopted an effective measure;
Be used to judge whether to receive the device of main car stop signal; Whether detect main car stops;
If do not receive main car stop signal, then get into the said device that is used for sending alerting signal to main car; If main car does not stop, then continue to send alerting signal, notify main car to stop;
If receive main car stop signal, then entering is used to stop to send the device of alerting signal.
The shortest stopping distance of said enough safety distance during greater than said main car 1 emergency braking.So just can guarantee that said preceding guide-car 2 is after said main car 1 sends accident early warning; Main car 1 can not with said before under guide-car 2 situation about bumping; In time take safety measures such as deceleration or emergency braking,, also can guarantee the safety of said main car 1 even guide-car 2 meets accident before said.Before said, in guide-car 2 and main car 1 driving process, generally keep both speed identical, just can guarantee that both go by actv. in safety distance, said main car 1 main control computer also includes the speed of a motor vehicle and safety distance control part, and is as shown in Figure 4:
Be used to the device of judging whether main car stops;
If main car stops, then get into the device that is used to finish;
If main car does not stop, the guide-car sent the device of wheel revolutions before then entering was used for to main car;
Be used for the device that main car receives preceding guide-car's wheel revolutions signal;
Be used for main car and calculate the device that preceding guide-car has rolled distance away from;
Be used for main car and calculate the device that this car has rolled distance away from;
The safety distance that is used for requiring according to main car current driving speed calculation device;
The device of guide-car and main car actual pitch before being used to calculate;
Be used to judge two following distances whether surpass current requirement safety distance device;
If do not surpass, then get into the said device of judging whether main car stops of being used to;
If surpass, then get into the device of the main car of adjustment and preceding guide-car's speed of a motor vehicle; Main car deceleration or preceding guide-car are given it the gun, meet the requirements of safety distance up to two following distances;
Get back to the said device of judging whether main car stops of being used to.
Guide-car's 2 main control modules are provided with input port connection pick up camera, gps satellite position fixing system, infrared ray and radar detector before said.Can be under the situation that does not receive the restriction of weather condition and other situation; Survey the place ahead road conditions, obstacle etc. in all directions and be an impediment to the situation that said main car 1 goes; Said main car 1 can in time take effective measures according to these situation, prevents the generation of accident as much as possible.
Said train accident early warning and collision avoidance system are identification and the data managements that realizes identity through SIM.Through SIM, accuracy, safety and the specificity just can guarantee information transmitted, have only the SIM of insertion after, said train accident early warning and collision avoidance system could normal operation.
As shown in Figure 5:
The internal circuit of said A/D conversion chip ADT is formed by dialling position switch S1, switch S 2, reverse integral device UJ, integrating capacitor C, comparator UB, NAND gate G, counting machine COU, timer TIM and logic control door LOG; Two free ends of said group of position switch S1, a termination is received the input voltage u of crash sensor i, the other end receives reference voltage-V REFThe fixed end of this group position switch S1 connects the negative input of said reverse integral device UJ; The positive input ground connection of this reverse integral device UJ, the mouth of said reverse integral device UJ outputs signal to the negative input of said comparator UB, between the mouth of said reverse integral device UJ and negative input and be connected to said integrating capacitor C; This integrating capacitor C is parallelly connected with said switch S 2; The positive input ground connection of said comparator UB, the mouth of this comparator UB connect the input end of said NAND gate G, another input end receive clock signal of this NAND gate G; The mouth of said NAND gate G connects the input end of said counting machine COU; The mouth of this counting machine COU links to each other with the input end of said timer TIM, and the mouth of said timer TIM connects the input end of said logic control door LOG, and this logic control door LOG controls the said group of free-ended connection of position switch S1.
Said crash sensor when detecting collision and take place, u i＞0, when detecting the collisionless generation, u i=0.
New field of technical activity: said switch S 2 closures, treat said integrating capacitor C discharge off, this switch S 2 is broken off, said counting machine COU zero clearing simultaneously.
Integration phase for the first time: said logic control door LOG output low level, control said group of position switch S1, said reverse integral device UJ begins integration, integral result u 0>=0 o'clock, said comparator UB was output as 0, integral result u 0＜0 o'clock, said comparator UB was output as 1, was that the clock pulse of T is imported said NAND gate G with said comparator UB output result with the cycle, and this NAND gate G output clock pulse drives said counting machine COU counting, through 2 nIndividual clock pulse, after said counting machine COU reaches full scale, said logic control door LOG output high level, said group of position switch S1 receives crash sensor input voltage u iFree end break off, another receives reference voltage-V REFFree end closed.Integration finishes for the first time, gets into integration phase for the second time.Whole first time integration phase, said reverse integral device UJ output voltage
u o = - 1 τ ∫ 0 t u i dt
For the first time integration time t=T 1=2 nT c
When integration finishes for the first time, said reverse integral device UJ output voltage
u p = - T 1 τ u i = - 2 n T c τ u i
Integration phase: reference voltage-V for the second time REFBe added to the negative input of said reverse integral device UJ, as this reverse integral device UJ output voltage u 0=0 o'clock, said comparator UB was output as 0, and said NAND gate G input end is closed, and said counting machine COU stops counting.This stage said reverse integral device UJ output voltage
u o ( t 2 ) = u p - 1 τ ∫ t 1 t 2 ( - V REF ) dt = 0
If T 2=t 2-t 1,
V REF T 2 τ = 2 n T c τ u i
Have
T 2 = 2 n T c V REF u i
Suppose that this hour counter COU displayed value is λ, then have
T 2＝λT c
So λ = T 2 T c = 2 n V REF u i
Can find out the value λ of said counting machine COU demonstration and the input voltage u of the integration phase first time iBe directly proportional, can directly read input voltage u from said counting machine COU iValue.If u i＞V REFThen this counting machine COU also just shows the full scale result.If get V REF=2 nV, then tested voltage u iJust equal the value that said counting machine COU shows.
The train attendant can understand the order of severity of said preceding guide-car's 2 collisions according to the size of said counting machine COU displayed value.
Its principle of work is following: preceding guide-car is preceding, main car after, two cars are with identical speed, main simultaneously car owner's control computer is monitored two cars at any time and whether is kept enough safety distances, in case hypotelorism, control that main car slows down at once or before the guide-car quicken; Main car and preceding guide-car keep in communication through gsm system at any time, and in a single day the crash sensor of preceding guide-car's front end detects collision information, just send this collision information through gsm system to main car at once; The signal that main car owner's control computer also transmits preceding guide-car at any time judges, confirms that when safe, the green indicating lamp on the main car is bright; If during the accident alarming signal, red indicating light is bright, and counting machine shows the size of impact force this moment; Carry out the parking area reason on the main vehicle and horse; And the guide-car is stopped before the notice, and preceding guide-car receives the stop signal that main car is sent, and just no longer sends alerting signal to main car; Pick up camera on the current guide-car, infrared ray, when radar detector detects accident information, preceding guide-car too send alarm message to main car, main car is in time made corresponding emergency handling; If the signal that the guide-car was transmitted before in a single day main car did not receive is taked on the main vehicle and horse to stop and handled, to avoid accident.

Claims (6)

1. train accident early warning and collision avoidance system; Comprise main car (1); Indicator lamp (L) is installed on the said main car (1); It is characterized in that: also include preceding guide-car (2), on said main car (1) and the preceding guide-car (2) wireless telecommunication system (3) is installed all, said main car (1) and preceding guide-car (2) are through said wireless telecommunication system (3) transmission information;
Guide-car (2) is positioned at said main car (1) front before said, keeps a safe distance with said main car (1); Should crash sensor (CR) be installed preceding guide-car (2) front end, this crash sensor (CR) sends collision alarm to said wireless telecommunication system (3), and sends this collision alarm to said main car (1) through this wireless telecommunication system (3);
Be provided with main control computer in the said main car (1), this main control computer obtains the collision alarm that said wireless telecommunication system provides, and is provided with in this main control computer:
The device of guide-car's signal before being used to judge whether to receive;
If guide-car's signal before not receiving then gets into the device that is used for main car parking processing;
If guide-car's signal before receiving then gets into the device that is used to judge whether alerting signal;
If there is not alerting signal, then get into the bright device of safety light;
Get back to the said device that is used to judge whether to receive preceding guide-car's signal;
If alerting signal is arranged, then get into the bright device of warning indicator lamp;
Be used for the device that main car stops and handles;
Be used for the device that guide-car forward sends stop signal;
Be provided with control computer in the guide-car (2) before said, this control computer is obtained the collision alarm of said crash sensor (CR), is provided with in this control computer:
Be used to judge whether the device of sensor input signal;
If there is not sensor input signal, then get into the device that is used for sending normal signal to main car;
Get back to the said device that is used to judge whether sensor input signal;
If sensor input signal is arranged, then get into the device that is used for sending alerting signal to main car;
Be used to judge whether to receive the device of main car stop signal;
If do not receive main car stop signal, then get into the said device that is used for sending alerting signal to main car;
If receive main car stop signal, then entering is used to stop to send the device of alerting signal.
2. according to said train accident early warning of claim 1 and collision avoidance system; It is characterized in that: said wireless telecommunication system (3) is made up of sendaisle (SC) and receiving cable (AC); Said sendaisle (SC) is made up of A/D conversion chip (ADT), main control module (CCT1), MOD (MOD) and antenna modular converter; Said A/D conversion chip (ADT) input end ANALOG receives signal; After carrying out analogue to digital conversion, give said main control module (CCT) by mouth D1, D2, D3, D4, D5, D6, D7, D8 output digital signal, this main control module (CCT) is to after the digital signal processing; Give said MOD (MOD) and carry out modulation treatment, after the antenna modular converter sends signal; Said receiving cable (AC) is made up of D/A conversion chip (DAT), demoder (DEM); After said antenna modular converter receives signal; Said demoder (DEM) carries out demodulation to received signal; Send restituted signal and give said main control module (CCT); After said main control module is handled it, give input end DI0, DI1, DI2, DI3, DI4, DI5, DI6, the DI7 of said D/A conversion chip (DAT) with signal, digital to analogy conversion is after said D/A conversion chip (DAT) mouth IOUT1 and IOUT2 output.
3. according to said train accident early warning of claim 1 and collision avoidance system, it is characterized in that: the shortest stopping distance of said safety distance during more than or equal to said main car (1) emergency braking.
4. according to claim 1 or 3 said train accident early warning and collision avoidance system, it is characterized in that: said main car (1) main control computer also is provided with the speed of a motor vehicle and safety distance control part:
Be used to the device of judging whether main car stops;
If main car stops, then get into the device that is used to finish;
If main car does not stop, then entering is used for the device that the preceding guide-car of main car calculating has rolled distance away from;
Be used for main car and calculate the device that this car has rolled distance away from;
The safety distance that is used for requiring according to main car current driving speed calculation device;
The device of guide-car and main car actual pitch before being used to calculate;
Be used to judge two following distances whether surpass current requirement safety distance device;
If do not surpass, then get into the said device of judging whether main car stops of being used to;
If surpass, then get into the device of the main car of adjustment and preceding guide-car's speed of a motor vehicle;
Get back to the said device of judging whether main car stops of being used to.
5. according to said train accident early warning of claim 1 and collision avoidance system, it is characterized in that: guide-car (1) main control module is provided with input port connection pick up camera, gps satellite position fixing system, infrared ray and radar detector before said.
6. according to said train accident early warning of claim 2 and collision avoidance system, it is characterized in that: the internal circuit of said A/D conversion chip (ADT) is formed by dialling position switch (S1), switch (S2), reverse integral device (UJ), integrating capacitor (C), comparator (UB), NAND gate (G), counting machine (COU), timer (TIM) and logic control door (LOG);
Two free ends of said group of position switch (S1), a termination is received the input voltage u of crash sensor i, the other end receives reference voltage-V REFThe fixed end of this group position switch (S1) connects the negative input of said reverse integral device (UJ); The positive input ground connection of this reverse integral device (UJ), the mouth of said reverse integral device (UJ) outputs signal to the negative input of said comparator (UB), between the mouth of said reverse integral device (UJ) and negative input and be connected to said integrating capacitor (C); This integrating capacitor (C) is parallelly connected with said switch (S2); The positive input ground connection of said comparator (UB), the mouth of this comparator (UB) connect an input end of said NAND gate (G), another input end receive clock signal of this NAND gate (G); The mouth of said NAND gate (G) connects the input end of said counting machine (COU); The mouth of this counting machine (COU) links to each other with the input end of said timer (TIM), and the mouth of said timer (TIM) connects the input end of said logic control door (LOG), the free-ended connection of this logic control door (LOG) control said group of position switch (S1).
CN2008100692632A 2008-01-18 2008-01-18 Accident early warning and anti-collision system for train Expired - Fee Related CN101214822B (en)

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CN102951184A (en) * 2011-08-26 2013-03-06 马祥虎 Rear-end collision prevention technology for motor trains
CN102390393A (en) * 2011-09-09 2012-03-28 俞钟晓 Method for preventing rear end collision of motor train
CN102745211B (en) * 2012-07-31 2015-03-04 中国科学院上海高等研究院 Train pre-warning system and pre-warning method based on tunnel piston wind
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