CN109131446A - Train DAS (Driver Assistant System) based on wireless LoRa network - Google Patents
Train DAS (Driver Assistant System) based on wireless LoRa network Download PDFInfo
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- CN109131446A CN109131446A CN201710453288.1A CN201710453288A CN109131446A CN 109131446 A CN109131446 A CN 109131446A CN 201710453288 A CN201710453288 A CN 201710453288A CN 109131446 A CN109131446 A CN 109131446A
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
- B61L23/00—Control, warning or like safety means along the route or between vehicles or trains
- B61L23/22—Control, warning or like safety means along the route or between vehicles or trains for controlling traffic in two directions over the same pair of rails
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
- B61L23/00—Control, warning or like safety means along the route or between vehicles or trains
- B61L23/34—Control, warning or like safety means along the route or between vehicles or trains for indicating the distance between vehicles or trains by the transmission of signals therebetween
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Train Traffic Observation, Control, And Security (AREA)
Abstract
The present invention discloses a kind of train DAS (Driver Assistant System) based on wireless LoRa network, comprising: mobile unit and signal machine equipment；The mobile unit includes the first LoRa module, GPS module, first microprocessor and cue module, the signal machine equipment includes the 2nd LoRa module, the second microprocessor and current transformer, for realizing prompting, train operator pays attention to front signal light, the distance between protection and train and train that make a dash across the red light is reminded, and prevents to collide two functions.LoRa network has the function of ad hoc network, can carry out corresponding information transmission according to IP address difference, a kind of LoRa equipment can be used in semaphore and train, and deployment difficulty substantially reduces.LoRa technology has the link budget of up to 157db, and communication distance can be used up to 15 kilometers on the train of fast speed.
Description
Technical field
The present invention relates to rail traffic wireless communication fields, and in particular to a kind of train auxiliary based on wireless LoRa network
Control loop.
Background technique
In rail traffic, the use of signal lamp ensure that train is driven a vehicle safe and orderlyly, effectively improve rail traffic
Conevying efficiency reduces transportation cost.But the signal lamp quantity under normal conditions along rail traffic is more, and driver is in driving conditions
In, in fact it could happen that lead to the case where accidentally making a dash across the red light because of bad weather, causes dangerous situation.So formulating scientific and effective prevention mechanism
Be it is very necessary, when train passes through red light, mobile unit makes corresponding prompt, and driver is allowed to notice the shape of signal lamp
State, to ensuring that the safe operation of rail traffic has great practical significance.In addition, during train driving, between train
It needs to keep certain safe distance, therefore realizes that distance is reminded between train and train, preventing collision equally has ten
Divide important realistic meaning.
In order to carry out red light prompting and apart from prompting, it has been proposed that realizing ground signal letter in conjunction with ZigBee technology
Breath acquisition and vehicle between train and semaphore real time communication technical solution (referring to: the subway train based on ARM runs auxiliary
Systematic research and design author: Xi Zhengbo degree-conferring units: Zhejiang Prov Industrial And Commercial University's degree year: 2015), but the program
Middle Zigbee equipment complicated composition are made of three kinds of terminal, coordinator and router different units, are deployed at the construction field (site)
Certain difficulty；In addition, ZigBee technology is a kind of mechanics of communication of short distance, in field of track traffic, for speed compared with
Fast train is less applicable in.
Summary of the invention
In view of the shortcomings of the prior art and defect, the present invention provide a kind of train auxiliary based on wireless LoRa network
Control loop.
The embodiment of the present invention proposes a kind of train DAS (Driver Assistant System) based on wireless LoRa network, comprising:
Mobile unit and signal machine equipment；Wherein,
The mobile unit includes the first LoRa module, GPS module, first microprocessor and cue module, wherein
There are four effects for the first LoRa module, first is that for receiving the corresponding signal of the affiliated range of receiving of corresponding train
The semaphore status information and the Position Number of the signal machine equipment in whole route that machine equipment is sent；Second is that same for receiving
The geographical location information of the inquiry message of other broadcasting for train and transmission on one track；Third is that the geography for sending corresponding train
Location information；Fourth is that being used for broadcast polling information；
The GPS module carries out the geographical location information for obtaining the current geographical location information of corresponding train
Coding, obtains the coding of the geographical location information, and the coding of the geographical location information is sent to described first micro- place
Manage device；
There are five the effects of the first microprocessor, first is that parsing the geographical location letter that the GPS module is sent
The coding of breath obtains the current geographical location information of corresponding train；Second is that other broadcasting for train on receiving same track
When inquiry message, the geographical location information is packaged, forms fixed message format, and pass through the first LoRa mould
Block is replied；Third is that parsing the semaphore status information and Position Number, corresponding train fortune is judged according to parsing result
The signal lamp state of row front signal machine equipment；Fourth is that the geographical location information that the parsing other trains are sent, and with it is corresponding
Train carries out position versus, obtains the distance between other trains and corresponding train information；Fifth is that driving cue module, with
Make the cue module in the signal lamp red light of respective column front side signal machine equipment or other trains with it is corresponding
The distance between train is prompted when being less than default value；
The signal machine equipment includes the 2nd LoRa module, the second microprocessor and current transformer, wherein
There are two the effects of the 2nd LoRa module, first is that the inquiry for receiving the broadcasting for train for driving into range of receiving
Information；Second is that the position of the semaphore status information of the signal machine equipment and the signal machine equipment in whole route is compiled
Number it is sent to the train；
There are three the effects of second microprocessor, first is that parsing the broadcast polling information that the train is sent；Second is that
The information for acquiring current transformer, obtains the semaphore status information；Third is that the semaphore status information and position are compiled
Number formed data packet；Fourth is that the data packet is sent to the train, the Current Mutual Inductance by the 2nd LoRa module
Device is articulated on the power supply line inside the signal machine equipment, according to the signal lamp on/off cable current of the signal machine equipment
Difference identifies the semaphore status information.
Train DAS (Driver Assistant System) provided in an embodiment of the present invention based on wireless LoRa network, mobile unit are integrated with
One LoRa module, GPS module, first microprocessor and cue module realize that train positions using GPS module, and by means of the
One microprocessor according to train position determine train and same track go forward after the distance between train, be less than in the distance
It is prompted when default value by cue module；Semaphore integration of equipments the 2nd LoRa module, the second microprocessor and electricity
Current transformer can obtain the position of the semaphore status information and signal machine equipment of signal machine equipment in whole route and compile
Number, and it is sent to mobile unit, first microprocessor is judged according to the semaphore status information and Position Number
The signal lamp state of train operation front signal machine equipment out is prompted when signal lamp is red light by cue module, i.e.,
It may be implemented that train operator is reminded to pay attention to front signal light through the above scheme, make a dash across the red light between protection and train and train
Distance is reminded, and prevents to collide two functions.In addition, mobile unit and semaphore integration of equipments LoRa module, make train
Between and train and signal machine equipment between remote wireless telecommunications may be implemented, and be easy to build and dispose, solve
Because disposing the big problem of difficulty caused by using ZigBee technology, moreover, because system communication distance is remote, therefore can be used for speed
Spend faster train.
Detailed description of the invention
Fig. 1 is that the present invention is based on the structural schematic diagrams of one embodiment of train DAS (Driver Assistant System) of wireless LoRa network；
Fig. 2 is the connection figure of the intermodule for the mobile unit that one embodiment of the invention provides；
Fig. 3 is the connection figure of the intermodule for the signal machine equipment that one embodiment of the invention provides；
Fig. 4 is the safeguard function structural schematic diagram that makes a dash across the red light that one embodiment of the invention provides；
Fig. 5 is the train crash structure schematic diagram that one embodiment of the invention provides.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical solution in the embodiment of the present invention is explicitly described, it is clear that described embodiment is the present invention
A part of the embodiment, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art are not having
Every other embodiment obtained under the premise of creative work is made, shall fall within the protection scope of the present invention.
Referring to Fig. 1, the present embodiment discloses a kind of train DAS (Driver Assistant System) based on wireless LoRa network, comprising:
Mobile unit 1 and signal machine equipment 2；Wherein,
The mobile unit 1 includes the first LoRa module, GPS module, first microprocessor and cue module, wherein
There are four effects for the first LoRa module, first is that for receiving the corresponding signal of the affiliated range of receiving of corresponding train
The semaphore status information and the Position Number of the signal machine equipment 2 in whole route that machine equipment 2 is sent；Second is that for receiving
The geographical location information of the inquiry message of other broadcasting for train and transmission on same track；Third is that the ground for sending corresponding train
Manage location information；Fourth is that being used for broadcast polling information；
The GPS module carries out the geographical location information for obtaining the current geographical location information of corresponding train
Coding, obtains the coding of the geographical location information, and the coding of the geographical location information is sent to described first micro- place
Manage device；
There are five the effects of the first microprocessor, first is that parsing the geographical location letter that the GPS module is sent
The coding of breath obtains the current geographical location information of corresponding train；Second is that other broadcasting for train on receiving same track
When inquiry message, the geographical location information is packaged, forms fixed message format, and pass through the first LoRa mould
Block is replied；Third is that parsing the semaphore status information and Position Number, corresponding train fortune is judged according to parsing result
The signal lamp state of row front signal machine equipment 2；Fourth is that the geographical location information that the parsing other trains are sent, and with it is corresponding
Train carries out position versus, obtains the distance between other trains and corresponding train information；Fifth is that driving cue module, with
Make the cue module in the signal lamp red light of respective column front side signal machine equipment 2 or other trains with it is corresponding
The distance between train is prompted when being less than default value；
The signal machine equipment 2 includes the 2nd LoRa module, the second microprocessor and current transformer, wherein
There are two the effects of the 2nd LoRa module, first is that the inquiry for receiving the broadcasting for train for driving into range of receiving
Information；Second is that the position by the semaphore status information of the signal machine equipment 2 and the signal machine equipment 2 in whole route
Number is sent to the train；
There are three the effects of second microprocessor, first is that parsing the broadcast polling information that the train is sent；Second is that
The information for acquiring current transformer, obtains the semaphore status information；Third is that the semaphore status information and position are compiled
Number formed data packet；Fourth is that the data packet is sent to the train, the Current Mutual Inductance by the 2nd LoRa module
Device is articulated on the power supply line inside the signal machine equipment 2, according to the signal lamp on/off cable current of the signal machine equipment 2
Difference, identify the semaphore status information.
Train DAS (Driver Assistant System) provided in an embodiment of the present invention based on wireless LoRa network, mobile unit are integrated with
One LoRa module, GPS module, first microprocessor and cue module realize that train positions using GPS module, and by means of the
One microprocessor according to train position determine train and same track go forward after the distance between train, be less than in the distance
It is prompted when default value by cue module；Semaphore integration of equipments the 2nd LoRa module, the second microprocessor and electricity
Current transformer can obtain the position of the semaphore status information and signal machine equipment of signal machine equipment in whole route and compile
Number, and it is sent to mobile unit, first microprocessor is judged according to the semaphore status information and Position Number
The signal lamp state of train operation front signal machine equipment out is prompted when signal lamp is red light by cue module, i.e.,
It may be implemented that train operator is reminded to pay attention to front signal light through the above scheme, make a dash across the red light between protection and train and train
Distance is reminded, and prevents to collide two functions.In addition, mobile unit and semaphore integration of equipments LoRa module, make train
Between and train and signal machine equipment between remote wireless telecommunications may be implemented, and be easy to build and dispose, solve
Because disposing the big problem of difficulty caused by using ZigBee technology, moreover, because system communication distance is remote, therefore can be used for speed
Spend faster train.
On the basis of previous embodiment, the cue module may include:
Liquid crystal display and voice broadcast module；Wherein,
The first microprocessor is specifically used for driving the liquid crystal display, makes the liquid crystal on-screen-display message, and driving
The voice broadcast module realizes the function of voice reminder, and there are three the effects of the liquid crystal display, first is that showing the respective column
The signal lamp state information of vehicle operation front signal machine equipment；Second is that showing the distance between other trains and corresponding train
Information；Third is that display reminding information, prompt information includes noticing that the prompt information of front red light and front-and-rear vehicle distance are mentioned from excessively close
Show information, there are two the effects of the voice broadcast module, first is that setting for respective column front side semaphore described in voice reminder
Standby signal lamp state, second is that for remind the corresponding train and same track front-and-rear vehicle distance from.
Fig. 2 is the connection figure of the intermodule of mobile unit, and Fig. 3 is the module connection figure of signal machine equipment, and Fig. 4 is to make a dash across the red light
Safeguard function structural schematic diagram, referring to fig. 2, Fig. 3 and Fig. 4, the specific implementation for the safeguard function that makes a dash across the red light it is as follows:
The USART1 interface of first microprocessor connects GPS module, and GPS module sends NMEA- to first microprocessor
The data packet of 0183 format, first microprocessor receive and parse through these data packets, obtain the geographical location information of current train.
The USART2 interface of first microprocessor connects the first LoRa module, for communicating wirelessly with the external world.First microprocessor
USART3 interface connect with liquid crystal display, for controlling liquid crystal on-screen-display message.The USART4 interface and language of first microprocessor
The connection of sound broadcasting module carries out voice prompting for controlling voice broadcast module.
The ADC1 interface of second microprocessor is connect with current transformer 1, and ADC2 interface is connect with current transformer 2, when
When the red light of semaphore is bright, current transformer 1 can induce voltage signal, be acquired by the ADC1 of the second microprocessor；Work as signal
When the green light of machine, current transformer 2 can induce voltage signal, be acquired by the ADC2 of the second microprocessor.Second micro process
The USART2 interface of device connects the 2nd LoRa module, for sending the status information of the semaphore.
Train-installed equipment can be broadcasted 1 time outward at interval of 1 second, after train drives into the range of receiving of signal machine equipment,
Signal machine equipment will receive broadcast message, and signal machine equipment is by the Position Number and letter in whole route of oneself at this time
Number current state of machine is sent to train, after train-installed equipment receives information, by parsing and judging, is shown by liquid crystal display
Prompt information out carries out voice prompting by voice broadcast module, plays the role of protection of making a dash across the red light.
The specific implementation of train anti-collision is as follows:
Train crash structure schematic diagram is as shown in figure 5, the mobile unit of train 1 and train 2 can broadcast outward every 1 second
Inquiry message will receive mutually the inquiry message of other side's sending when the distance between two trains are in broadcasting area,
Then the geographical location information of oneself is sent to other side's train, train will by first microprocessor processing after receiving information
Obtain the distance between two vehicles, the liquid crystal display of mobile unit can show range information, while the voice of mobile unit is broadcast
Module is reported to carry out voice prompting, train operator carries out acceleration and deceleration according to prompt, plays the role of preventing train collision.
In the present embodiment, is shown by liquid crystal display and two kinds of means of voice reminder and user carry out human-computer interaction, ensure that
It reminds in time.
Below with reference to specific embodiment to the present invention is based on the train DAS (Driver Assistant System)s of wireless LoRa network to say
It is bright.
Example 1
Train based on LoRa network makes a dash across the red light DAS (Driver Assistant System)
By taking the train-installed equipment of A and the communication of a-signal machine equipment as an example:
1) the broadcast polling signal of transmission in the train-installed equipment interval of A 1 second.
2) a-signal machine equipment judges whether to receive the broadcast polling signal of the train-installed equipment of A, and step is executed if receiving
It is rapid 3), otherwise, continue keep reception state.
3) after a-signal machine equipment receives the broadcast polling signal of the train-installed equipment of A, the instruction shape of the semaphore is detected
The Position Number of the status information of semaphore and semaphore in whole route is sent to the train-installed equipment of A by state, then extensive
Multiple reception state.
4) the train-installed equipment of A judges whether to receive the return information of a-signal machine equipment transmission, is walked if receiving
It is rapid 5), otherwise keep interval 1 second send a broadcast polling signal state.
5) the train-installed equipment of A receives the return information of a-signal machine equipment transmission, is parsed, if semaphore is at this time
For green light, liquid crystal display can be shown " front safety, please trust passage ", and voice prompting is " front safety, please trust passage "；If
Semaphore is red light at this time, and liquid crystal display can be shown " danger ahead asks slow down ", and voice prompting is that " danger ahead please slow down
It goes slowly ".
Example 2
Train based on LoRa network makes a dash across the red light DAS (Driver Assistant System)
By taking the train-installed equipment of A and the train-installed device talk of B as an example:
1) A train and the train-installed equipment interval of B can all send a broadcast polling signal in 1 second.
2) mobile unit of A train judges whether the broadcast polling signal that the mobile unit for receiving B train issues, if received
To step 3) is then carried out, interval is kept to send within 1 second the state of a broadcast polling signal if confiscating；B train it is vehicle-mounted
Equipment judges whether the broadcast polling signal that the mobile unit for receiving A train issues, and step 4) is carried out if receiving, if do not had
It receives, interval is kept to send within 1 second the state of a broadcast polling signal.
3) after the broadcast polling signal that the mobile unit that the mobile unit of A train receives B train issues, by the ground of A train
Reason location information is sent to the mobile unit of B train, then proceedes to the shape for keeping interval to send a broadcast polling signal for 1 second
State.
4) after the broadcast polling signal that the mobile unit that the mobile unit of B train receives A train issues, by the ground of B train
Reason location information is sent to the mobile unit of A train, then proceedes to the shape for keeping interval to send a broadcast polling signal for 1 second
State.
5) after the mobile unit of A train or B train receives the geographical location information that other side sends, by microprocessor processes
After will show that the distance between two vehicles, the liquid crystal display of mobile unit can show range information, the voice of mobile unit
Broadcasting module carries out voice prompting.
Example 3
Train based on LoRa network makes a dash across the red light DAS (Driver Assistant System)
In applying at the scene, it is possible that more vehicles, the case where multi signal machine communicates, with the train-installed equipment of A, B train
For mobile unit, a-signal machine equipment, the communication of B signal machine equipment:
1) A train and the train-installed equipment interval of B can all send a broadcast polling signal in 1 second.
2) mobile unit of A train judge whether to receive signal (signal source may are as follows: 1, the mobile unit hair of B train
Broadcast polling signal out；2, the return signal that the mobile unit of B train issues；3, the reply that a-signal machine or B signal machine issue
Signal), step 3) is carried out if receiving, and interval is kept to send within 1 second the state of primary broadcast letter inquiry number if confiscating；
The mobile unit of B train judges whether to receive signal (signal source may are as follows: 1, the broadcast that the mobile unit of A train issues askes
Ask signal；2, the return signal that the mobile unit of A train issues；3, the return signal that a-signal machine or B signal machine issue), if
It receives, carries out step 4), interval is kept to send within 1 second the state of a broadcast polling signal if confiscating；A-signal machine is set
It is standby to judge whether to receive signal (the broadcast polling signal that signal source is A train or the train-installed equipment of B), it is held if receiving
Row step 5) otherwise continues to keep reception state；B signal machine equipment judges whether to receive signal, and (signal source is A train or B
The broadcast polling signal of train-installed equipment), it is thened follow the steps 6) if received, otherwise, continues to keep reception state.
3) after the mobile unit of A train receives signal, data packet is unpacked, is judged according to the flag bit in data packet
The source of signal out, if the broadcast polling signal that the mobile unit that signal source is B train issues, the mobile unit of A train
The geographical location information of oneself can be sent to the mobile unit of B train, then restore that the interval primary broadcast of transmission in 1 second is kept to ask
Ask the state of signal；If the geographical location information that the mobile unit that signal source is B train issues, by microprocessor processes
After will obtain the distance between two vehicles, the liquid crystal display of the train-installed equipment of A can show range information, and carry out voice
Then prompt restores the state for keeping interval to send a broadcast polling signal for 1 second；If signal is believed from a-signal machine or B
The return signal that number machine issues judges signal that train operation ahead first passes around according to the signal serial number in information first
Machine, if this semaphore is green light at this time, liquid crystal display can show " front safety, please trust passage " that voice prompting is " front peace
Entirely, it please trust passage "；If this semaphore is red light at this time, liquid crystal display can show " danger ahead asks slow down ", voice
" danger ahead asks slow down " is prompted for, the state for keeping interval to send a broadcast polling signal for 1 second is then restored.
4) after the mobile unit of B train receives signal, unpacking analysis is carried out to data packet, according to the flag bit in data packet
Judge the source of signal, if signal source be A train mobile unit issue broadcast polling signal, B train it is vehicle-mounted
The geographical location information of oneself can be sent to the mobile unit of A train by equipment, then restore to keep interval transmission in 1 second primary wide
Broadcast the state of request signal；If the geographical location information that the mobile unit that signal source is A train issues, by microprocessor
The distance between two vehicles will be obtained after processing, the liquid crystal display of the train-installed equipment of B can show range information, and carry out
Then voice prompting restores the state for keeping interval to send a broadcast polling signal for 1 second；If signal derives from a-signal machine
Or the return signal that B signal machine issues, judge what train operation ahead first passed around according to the signal serial number in information first
Semaphore, if this semaphore is green light at this time, liquid crystal display can show " front safety, please trust passage ", and voice prompting is " preceding
Fang Anquan please trust passage "；If this semaphore is red light at this time, liquid crystal display can show " danger ahead asks slow down ",
Voice prompting is " danger ahead asks slow down ", then restores the shape for keeping interval to send a broadcast polling signal for 1 second
State.
5) after a-signal machine equipment receives signal, unpacking analysis is carried out to data packet, is judged according to the flag bit in data packet
The source of signal out, if the broadcast polling signal that the mobile unit that signal source is A train issues, the inspection of a-signal machine equipment
The instruction state of oneself is surveyed, and the Position Number of the status information of a-signal machine and a-signal machine in whole route is sent to A
Then train restores reception state；If the broadcast polling signal that the mobile unit that signal source is B train issues, a-signal
Machine equipment detects the instruction state of oneself, and the Position Number by the status information of a-signal machine and a-signal machine in whole route
It is sent to B train, then restores reception state.
5) after B signal machine equipment receives signal, unpacking analysis is carried out to data packet, is judged according to the flag bit in data packet
The source of signal out, if the broadcast polling signal that the mobile unit that signal source is A train issues, the inspection of B signal machine equipment
The instruction state of oneself is surveyed, and the Position Number of the status information of B signal machine and B signal machine in whole route is sent to A
Then train restores reception state；If the broadcast polling signal that the mobile unit that signal source is B train issues, B signal
Machine equipment detects the instruction state of oneself, and the Position Number by the status information of B signal machine and B signal machine in whole route
It is sent to B train, then restores reception state.
Wherein, the packet encapsulation format of train transmission broadcast polling signal is as shown in table 1:
The packet encapsulation format of 1 train of table transmission broadcast polling signal
In table 1, the first frame head is fixed value 0xFE；First the first destination address of length domain representation, the first semaphore mark,
The sum of first train marker and the occupied byte number of the first reserved place are 0x05；First command field occupies two characters, is
0x24,0x5F indicate to send；First destination address occupies two characters, is 0xFF, 0xFF, indicates the whole network broadcast；First signal
Machine mark is 0xAB, the mark for the parsing of signal machine equipment；First train marker is 0xAC, the mark for train apparatus parsing
Will；First reserved place is used for Function Extension；Exclusive or and be the first length field, the first command field, the first destination address, the first signal
Machine mark, the first train marker, the first reserved place data exclusive or and.
The packet encapsulation format that train receives broadcast polling signal is as shown in table 2:
The packet encapsulation format of 2 train of table reception broadcast polling signal
In table 2, the second frame head is fixed value 0xFE；Second length field is transmitting terminal address, second signal machine mark, second
The sum of train marker and the occupied byte number of the second reserved place are 0x05；Second command field occupy two characters, be 0x44,
0x5F indicates to receive；Transmitting terminal address refers to comprising two bytes, and low byte is preceding, and high byte is rear, regulation column in the present system
The address of vehicle are as follows: 0~32767, semaphore address are as follows: 32768~65535；Second signal machine mark is 0xAB, is used for semaphore
The mark of equipment parsing；Second train marker is 0xAC, the mark for train apparatus parsing；Second reserved place expands for function
Exhibition；Second exclusive or and be the second length field, the second command field, transmitting terminal address, second signal machine mark, the second train marker,
The data exclusive or of second reserved place and.
The packet encapsulation format that train sends return signal is as shown in table 3:
The packet encapsulation format of 3 train of table transmission return signal
In table 3, third frame head is fixed value 0xFE；Third length field is the second destination address, the occupied word of GPS information
The sum of joint number；Third command field is to send order mark, is 0x24,0x5F；Second destination address is for the transmitting terminal in table 2
Location；GPS information is the information of train longitude and latitude；Third exclusive or and be third length field, third command field, the second destination
Location, GPS information data exclusive or and.
The packet encapsulation format that semaphore sends return signal is as shown in table 4:
The packet encapsulation format of 4 semaphore of table transmission return signal
In table 4, the 4th frame head is fixed value 0xFE；4th length field is third destination address, occupied by semaphore state
The sum of byte number；4th command field is to send order mark, is 0x24,0x5F；Third destination address is the transmitting terminal in table 2
Address；Semaphore state is that 0x55 indicates red light or is that 0xAA indicates green light；4th exclusive or and be the 4th length field, the 4th life
Enable domain, third destination address, semaphore state data exclusive or and.
Although the embodiments of the invention are described in conjunction with the attached drawings, but those skilled in the art can not depart from this hair
Various modifications and variations are made in the case where bright spirit and scope, such modifications and variations are each fallen within by appended claims
Within limited range.
Claims (6)
1. a kind of train DAS (Driver Assistant System) based on wireless LoRa network characterized by comprising
Mobile unit and signal machine equipment；Wherein,
The mobile unit includes the first LoRa module, GPS module, first microprocessor and cue module, wherein
There are four effects for the first LoRa module, first is that setting for receiving the corresponding semaphore of the affiliated range of receiving of corresponding train
The semaphore status information and the Position Number of the signal machine equipment in whole route that preparation is sent；Second is that for receiving same rail
The geographical location information of the inquiry message of other broadcasting for train and transmission on road；Third is that the geographical location for sending corresponding train
Information；Fourth is that being used for broadcast polling information；
The GPS module is used to obtain the current geographical location information of corresponding train, encodes to the geographical location information,
The coding of the geographical location information is obtained, and the coding of the geographical location information is sent to the first microprocessor；
There are five the effects of the first microprocessor, first is that parsing the geographical location information that the GPS module is sent
Coding obtains the current geographical location information of corresponding train；Second is that on receiving same track other broadcasting for train inquiry
When information, the geographical location information is packaged, forms fixed message format, and by the first LoRa module into
Row is replied；Third is that the semaphore status information and Position Number are parsed, before judging corresponding train operation according to parsing result
The signal lamp state of square signal machine equipment；Fourth is that the geographical location information that the parsing other trains are sent, and with corresponding train
Position versus is carried out, the distance between other trains and corresponding train information are obtained；Fifth is that driving cue module, so that institute
Cue module is stated when the signal lamp of respective column front side signal machine equipment is red light or in other trains and corresponding train
The distance between be less than default value when prompted；
The signal machine equipment includes the 2nd LoRa module, the second microprocessor and current transformer, wherein
There are two the effects of the 2nd LoRa module, first is that the inquiry letter for receiving the broadcasting for train for driving into range of receiving
Breath；Second is that the Position Number by the semaphore status information of the signal machine equipment and the signal machine equipment in whole route
It is sent to the train；
There are three the effects of second microprocessor, first is that parsing the broadcast polling information that the train is sent；Second is that acquisition
The information of current transformer obtains the semaphore status information；Third is that by the semaphore status information and Position Number shape
At data packet；Fourth is that the data packet is sent to the train by the 2nd LoRa module, the current transformer is hung
It connects on the power supply line inside the signal machine equipment, not according to the signal lamp on/off cable current of the signal machine equipment
Together, the semaphore status information is identified.
2. system according to claim 1, which is characterized in that the cue module, comprising:
Liquid crystal display and voice broadcast module；Wherein,
The first microprocessor is specifically used for driving the liquid crystal display, makes the liquid crystal on-screen-display message, and described in driving
Voice broadcast module realizes the function of voice reminder, and there are three the effects of the liquid crystal display, first is that the display corresponding train fortune
The signal lamp state information of row front signal machine equipment；Second is that showing the distance between other trains and corresponding train letter
Breath；Third is that display reminding information, prompt information includes the prompt information for paying attention to front red light and front-and-rear vehicle distance from excessively close prompt
Information, there are two the effects of the voice broadcast module, first is that for respective column front side signal machine equipment described in voice reminder
Signal lamp state, second is that for remind the corresponding train and same track front-and-rear vehicle distance from.
3. system according to claim 1, which is characterized in that the packet encapsulation format of train transmission broadcast polling information
Include:
First frame head, the first length field, the first command field, the first destination address, the first semaphore mark, the first train marker,
First reserved place and the first exclusive or and；Wherein,
Destination address described in the first length domain representation, the first semaphore mark, the first train marker and the first reserved place institute
The sum of byte number of occupancy；
The first order domain representation is sent；
The destination address indicates that the whole network is broadcasted；
The first semaphore mark is used for the mark of signal machine equipment parsing；
First train marker is used for the mark of mobile unit parsing；
First reserved place is used for Function Extension；
First exclusive or and be first length field, the first command field, destination address, the first semaphore mark, first row
The first exclusive or of data of car mark and the first reserved place and.
4. system according to claim 1, which is characterized in that the packet encapsulation format of train reception broadcast polling information
Include:
Second frame head, the second length field, the second command field, transmitting terminal address, second signal machine mark, the second train marker,
Two reserved places and the second exclusive or and；Wherein,
Second length field is the transmitting terminal address, second signal machine mark, the second train marker and the second reserved place institute
The sum of byte number of occupancy；
The second order domain representation receives；
The second signal machine mark is used for the mark of signal machine equipment parsing；
Second train marker is used for the mark of mobile unit parsing；
Second reserved place is used for Function Extension；
Second exclusive or and be second length field, the second command field, transmitting terminal address, second signal machine mark, second
Train marker, the second reserved place data exclusive or and.
5. system according to claim 1, which is characterized in that the packet encapsulation format packet of train transmission return information
It includes:
Third frame head, third length field, third command field, the second destination address, GPS information and third exclusive or and；Wherein,
The third length field is the sum of second destination address and the occupied byte number of GPS information；
The third command field is to send order mark；
The GPS information is the information of train longitude and latitude；
The third exclusive or and the data exclusive or for being the third length field, third command field, the second destination address and GPS information
With.
6. system according to claim 1, which is characterized in that the packet encapsulation format packet of semaphore transmission return information
It includes:
4th frame head, the 4th length field, the 4th command field, third destination address, semaphore state and the 4th exclusive or and；Wherein,
4th length field is the sum of the third destination address and the occupied byte number of semaphore state；
4th command field is to send order mark；
4th exclusive or and be that the 4th length field, the 4th command field, third destination address, the data of semaphore state are different
Or and.
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