CN110626362B - Sanding control method based on LTE-R system and rail vehicle sanding system - Google Patents
Sanding control method based on LTE-R system and rail vehicle sanding system Download PDFInfo
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- CN110626362B CN110626362B CN201910917427.0A CN201910917427A CN110626362B CN 110626362 B CN110626362 B CN 110626362B CN 201910917427 A CN201910917427 A CN 201910917427A CN 110626362 B CN110626362 B CN 110626362B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61C—LOCOMOTIVES; MOTOR RAILCARS
- B61C15/00—Maintaining or augmenting the starting or braking power by auxiliary devices and measures; Preventing wheel slippage; Controlling distribution of tractive effort between driving wheels
- B61C15/08—Preventing wheel slippage
- B61C15/10—Preventing wheel slippage by depositing sand or like friction increasing materials
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/02—Services making use of location information
- H04W4/025—Services making use of location information using location based information parameters
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/30—Services specially adapted for particular environments, situations or purposes
- H04W4/38—Services specially adapted for particular environments, situations or purposes for collecting sensor information
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/30—Services specially adapted for particular environments, situations or purposes
- H04W4/40—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P]
- H04W4/42—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P] for mass transport vehicles, e.g. buses, trains or aircraft
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Abstract
The invention discloses a sanding control method based on an LTE-R system and a rail vehicle sanding system, wherein the sanding control method comprises the following steps: step 1: the sanding device receives first vehicle speed information, track flat curve radius information, environment temperature information and track gradient information through an LTE-R system; step 2: the sanding device generates a control signal according to first vehicle speed information, track flat curve radius information, environment temperature information, track gradient information, vehicle weight information, instantaneous speed increment, time increment and second vehicle speed information, and the sanding device acts according to the control signal; and step 3: the sanding device outputs current sanding information to the locomotive monitoring system through the LTE-R system.
Description
Technical Field
The invention relates to a sanding control method based on an LTE-R system and a rail vehicle sanding system, in particular to a sanding control method based on the LTE-R system and a rail vehicle sanding system applied to the technical field of rail vehicles.
Background
In the technical field of rail vehicles, a GSM-R railway communication system is basically adopted globally at present, and the communication system realizes the digitization of railway communication and plays an important role in the aspects of train control, communication safety, operation safety and the like.
With the development of wireless communication technology and the requirement of railways for continuously increasing running speed, an LTE-R (Long Term Evolution-Railway) Railway communication system is currently available. The communication system is a railway next-generation wireless communication system, has the characteristics of high safety and reliability, high-speed transmission, multi-service fusion and the like, meets the requirement of mobile communication of a 500km/h high-speed train, bears a CTCS3/4 train control system, and is applied to various services such as railway cluster multimedia dispatching and commanding, emergency communication, disaster prevention and early warning, video monitoring, railway internet of things and the like.
As vehicle speeds increase, very high demands are made on the adhesion between the wheel rails of the rail vehicle. Sanding devices are the preferred system for improving adhesion. The sand scattering device for the railway vehicle is generally arranged at the bottom of the railway vehicle and is used for spraying sand (such as quartz sand) with a specific specification between a wheel set tread of the railway vehicle and a track so as to improve the adhesion state between wheel tracks, thereby ensuring the braking performance of the railway vehicle and further ensuring the running safety performance of the railway vehicle. However, no existing sanding device considers the architecture of the LTE-R system at present.
Therefore, it is urgently needed to develop a sanding control method based on the LTE-R system.
Disclosure of Invention
In order to solve the above problems, the present invention provides a sanding control method based on an LTE-R system, wherein the sanding control method includes the following steps:
step 1: the sanding device receives first vehicle speed information, track flat curve radius information, environment temperature information and track gradient information through an LTE-R system;
step 2: the sanding device generates a control signal according to the first vehicle speed information, the track flat curve radius information, the environment temperature information, the track gradient information, the vehicle weight information, the instantaneous speed increment, the time increment and the second vehicle speed information, and the sanding device acts according to the control signal;
and step 3: and the sanding device outputs the current sanding information to a locomotive monitoring system through the LTE-R system.
The sanding control method described above, wherein the LTE-R system includes: the core network receives the first vehicle speed information, the track flat curve radius information, the environment temperature information and the track gradient information and sends the first vehicle speed information, the track flat curve radius information, the environment temperature information and the track gradient information to the sanding device through the base station in the step 1.
In the sanding control method, the base station includes a baseband unit and a remote radio unit, and step 1 includes:
step 11: the baseband unit receives the first vehicle speed information, the track flat curve radius information, the environment temperature information and the track gradient information output by the core network and outputs the information to the radio remote unit;
step 12: and the radio frequency remote unit receives the first vehicle speed information, the track flat curve radius information, the environment temperature information and the track gradient information and then outputs the information to the sanding device through a Uu interface.
The sanding control method described above, wherein said sanding device comprises: a sanding control unit and a sanding execution unit, wherein the step 2 comprises the following steps:
step 21: acquiring the vehicle weight information, the instantaneous speed increment and the second vehicle speed information through a sensor;
step 22: the sanding control unit receives and generates the control signal according to the first vehicle speed information, the track flat curve radius information, the environment temperature information, the track gradient information, the vehicle weight information, the instantaneous speed increment, the time increment and the second vehicle speed information;
step 23: and the sanding control unit receives and controls the sanding amount and the sanding speed of the sanding execution unit according to the control signal.
In the sanding control method, in the step 3, the sanding control unit generates the sanding information according to the current sanding state, and the sanding control unit outputs the sanding information to the locomotive monitoring system through the base station and the core network.
The sanding control method described above, wherein said core network comprises: the service gateway, the PDN gateway and the IP network, wherein the step 3 comprises the following steps:
step 31: the sanding control unit generates sanding information according to the current sanding state;
step 32: the sanding control unit outputs the sanding information to the remote radio frequency unit through a Uu interface, and the remote radio frequency unit receives and outputs the sanding information to the baseband unit;
step 33: and after receiving the sanding information, the baseband unit outputs the sanding information to the locomotive monitoring system through an S1-u interface, the service gateway, the PDN gateway and the IP network in sequence.
The sanding control method described above, wherein step 22 includes:
the sanding control unit obtains a parameter D according to the following formula, and generates the control signal according to the parameter D:
D＝[AV+(exp(F)-1)]；
wherein A is acceleration data information, V is speed data information, and F is centripetal force data information;
the sanding control unit obtains acceleration data information according to the following formula:
t is environment temperature information, i is track gradient information, delta T is time increment, delta V is instantaneous speed increment, and the T is obtained by measuring through a speed measuring sensor;
the sanding control unit obtains speed data information according to the following formula:
V＝(V1+V2)/2；
wherein, V1For the first vehicle speed information, obtained by satellite measurements, V2The second vehicle speed information is obtained by measuring through a speed measuring sensor;
the sanding control unit obtains centripetal force data information according to the following formula:
F＝MV2/R；
wherein M is vehicle weight information obtained by measurement of a vehicle weight sensor, and R is track flat curve radius information.
In the sanding control method, the sanding information includes sanding amount information and/or sanding speed information.
The invention also provides a rail vehicle sanding system based on the LTE-R system, wherein the rail vehicle sanding system is used for implementing any one of the sanding control methods, and comprises:
an LTE-R system;
the sanding device receives first vehicle speed information, track flat curve radius information, environment temperature information and track gradient information through an LTE-R system, generates a control signal according to the first vehicle speed information, the track flat curve radius information, the environment temperature information, the track gradient information, vehicle weight information, instantaneous speed increment, time increment and second vehicle speed information, acts according to the control signal, and outputs current sanding information to a locomotive monitoring system through the LTE-R system.
Aiming at the prior art, the invention has the following effects: the invention is suitable for the next generation communication system, namely an LTE-R (Long Term Evolution-Railway) Railway communication system, realizes the reliable transmission of data by means of the next generation communication system, simultaneously accurately controls the sand spreading amount and the sand spreading speed, and improves the safety of vehicles.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
FIG. 1 is a flow chart of a control method of the present invention;
FIG. 2 is a flow chart of steps of step 1 of FIG. 1;
FIG. 3 is a flow chart of steps of step 2 of FIG. 1;
FIG. 4 is a flow chart of substeps of step 3 of FIG. 1;
FIG. 5 is a schematic structural view of the rail vehicle sanding system of the present invention;
fig. 6 is a schematic diagram of an application of the rail vehicle sanding system of the present invention.
Wherein the reference numerals are:
LTE-R system: 4
A core network: 41
The service gateway: 411
PDN gateway: 412
IP network: 413
A base station: 42
A baseband unit: 421
The radio remote unit: 422
S1-u interface: 423
Sanding device: 5
Vehicle weight sensor: 51
A speed measurement sensor: 52
A sanding control unit: 53
Sanding execution unit: 54
The locomotive monitoring system comprises: 6
The train control application server: 61
A train: 7
A carriage: 71
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The exemplary embodiments of the present invention and the description thereof are provided to explain the present invention and not to limit the present invention. Additionally, the same or similar numbered elements/components used in the drawings and the embodiments are used to represent the same or similar parts.
As used herein, the terms "first," "second," …, etc., do not denote any order or sequence, nor are they used to limit the present invention, but rather are used to distinguish one element from another or from another element or operation described in the same technical language.
With respect to directional terminology used herein, for example: up, down, left, right, front or rear, etc., are simply directions with reference to the drawings. Accordingly, the directional terminology used is intended to be illustrative and is not intended to be limiting of the present teachings.
As used herein, the terms "comprising," "including," "having," "containing," and the like are open-ended terms that mean including, but not limited to.
As used herein, "and/or" includes any and all combinations of the described items.
References to "plurality" herein include "two" and "more than two"; reference to "multiple sets" herein includes "two sets" and "more than two sets".
As used herein, the terms "substantially", "about" and the like are used to modify any slight variation in quantity or error that does not alter the nature of the variation. Generally, the range of slight variations or errors modified by such terms may be 20% in some embodiments, 10% in some embodiments, 5% in some embodiments, or other values. It should be understood by those skilled in the art that the aforementioned values can be adjusted according to actual needs, and are not limited thereto.
The LTE-R system is used as a broadband mobile communication network, provides convenient communication conditions for railway production and related workers, and can meet the more humanized requirements of users on terminals besides the advantages of abundant service types and brand-new application experience brought to the users by service bandwidth increase. Through research, it is known that operators on railway lines or field maintenance personnel under railway lines need to carry multiple sets of terminals of different systems during operation, so that the load is heavy and the use is not flexible. The railway user needs a handheld terminal, and besides the basic voice communication function, the handheld terminal can also support the functions of data, picture, video return, illumination, positioning and the like when the user hopes to hold the terminal in a bullet train section, a power service section, a communication section and the like; the passenger transport section user hopes that the handheld terminal can realize the functions of mobile ticket selling, ticket checking, positioning, attendance checking, file signing, crew log compiling and the like besides the functions of voice communication and data, picture and video return. Therefore, the LTE-R system user terminal is integrated with multiple functions, and meanwhile, the diversity of the form can be considered, so that the LTE-R system user terminal is suitable for various railway user use scenes.
The base station (eNodeB) adopts a distributed architecture and comprises: a BaseBand Unit (BBU) and a Radio Remote Unit (RRU). The BBU mainly completes functions of baseband signal processing, protocol conversion, resource scheduling and the like, and performs data interaction with a core network through an S1-u interface. The RRU provides radio coverage of an LTE-R system network, and completes access of User Equipment (UE) and radio link transmission functions through a Uu interface. The RRUs can be connected to the BBU through optical fibers and distributed on two sides along the railway in a band shape, seamless coverage on the railway is kept, and communication with the train is achieved.
Referring to fig. 1, fig. 1 is a flowchart of a control method according to the present invention. As shown in fig. 1, the control method of the present invention includes the steps of:
step 1: the sanding device receives first vehicle speed information, track flat curve radius information, environment temperature information and track gradient information through an LTE-R system, is any one of the conventional rail vehicle sanding devices, and can spray sand with a specific specification between a wheel set tread and a track of a rail vehicle.
The LTE-R system comprises a core network and a base station (eNodeB), and in step 1, first vehicle speed information, track flat curve radius information, environment temperature information and track gradient information received by the core network are sent to the sanding device through the base station. In this embodiment, the first vehicle speed information, the track flat curve radius information, the ambient temperature information, and the track gradient information are obtained by satellite measurement.
Step 2: the sanding device generates a control signal according to first vehicle speed information, track flat curve radius information, environment temperature information, track gradient information, vehicle weight information, instantaneous speed increment, time increment and second vehicle speed information, and acts according to the control signal.
And step 3: the sanding device outputs current sanding information to a train control application server through an LTE-R system, wherein the sanding device generates sanding information according to a current sanding state, and the sanding information includes but is not limited to: the current sanding amount and the current sanding speed are obtained, the sanding control system sends current sanding information to the base station, the base station sends the current sanding information to a train control application server of the locomotive monitoring system through a core network, the train control application server stores the sanding information, and the locomotive monitoring system reads the sanding information stored by the train control application server so as to monitor the sanding device.
Further, the base station includes a BaseBand Unit (BBU) and a Radio Remote Unit (RRU), please refer to fig. 2, where fig. 2 is a flowchart of steps of step 1 in fig. 1, and step 1 includes:
step 11: the base band unit receives first vehicle speed information, track flat curve radius information, environment temperature information and track gradient information output by the core network and outputs the first vehicle speed information, the track flat curve radius information, the environment temperature information and the track gradient information to the radio frequency remote unit, wherein the base band unit receives the first vehicle speed information, the track flat curve radius information, the environment temperature information and the track gradient information through the core network and sends the first vehicle speed information, the track flat curve radius information, the environment temperature information and the track gradient information to the radio frequency remote unit;
step 12: the radio frequency remote unit outputs the received first vehicle speed information, the track flat curve radius information, the environment temperature information and the track gradient information to the sanding device through a Uu interface, wherein the radio frequency remote unit outputs the received first vehicle speed information, the received track flat curve radius information, the received environment temperature information and the received track gradient information to the sanding device through the Uu interface.
Still further, the sanding device comprises: a sanding control unit and a sanding execution unit, wherein the sanding control unit is used for generating a control signal to control the sanding execution unit, the sanding execution unit is used for completing sanding operation according to the control signal, please refer to fig. 3, fig. 3 is a flow chart of steps 2 in fig. 1, and step 2 includes:
step 21: the method comprises the steps of collecting vehicle weight information, instant speed increment and second vehicle speed information through a sensor, wherein the vehicle weight information of the rail vehicle and the second vehicle speed information and the instant speed increment of the current rail vehicle are respectively collected through a vehicle weight sensor and a speed measuring sensor.
Step 21: the sanding control unit receives and generates control signals according to first vehicle speed information, track flat curve radius information, environment temperature information, track gradient information, vehicle weight information and second vehicle speed information, wherein the sanding control unit is electrically connected to the vehicle weight sensor, the speed measurement sensor and the radio frequency remote unit, receives the first vehicle speed information, the track flat curve radius information, the environment temperature information and the track gradient information output by the radio frequency remote unit, and generates control signals according to the first vehicle speed information, the track flat curve radius information, the environment temperature information, the track gradient information, the vehicle weight information, the instant speed increment, the time increment and the second vehicle speed information after receiving the vehicle weight information, the instant speed increment and the second vehicle speed information output by the vehicle weight sensor and the speed measurement sensor.
Step 22: the sanding control unit controls the sanding amount and the sanding speed of the sanding execution unit according to the control signal, wherein the sanding control unit is electrically connected to the sanding execution unit, and the sanding execution unit adjusts the sanding amount and the sanding speed according to the control signal output by the sanding control unit, so that sanding operation is completed.
Still further, the core network comprises: serving GateWay (S-GW), PDN GateWay (P-GW) and IP network, the base station includes: referring to fig. 4, fig. 4 is a flowchart illustrating steps of step 3 in fig. 1, where step 3 includes the following steps:
step 31: the sanding control unit generates sanding information according to the current sanding state;
step 32: the sanding control unit outputs sanding information to the radio remote unit through a Uu interface (air interface), and the radio remote unit receives and outputs the sanding information to the baseband unit, wherein the sanding control unit is connected with the radio remote unit through the Uu interface and is communicated with a core network entity through a base station, and then the whole end-to-end service connection is completed;
step 33: and after receiving the sanding information, the baseband unit outputs the sanding information to the locomotive monitoring system through the S1-u interface, the service gateway, the PDN gateway and the IP network in sequence.
Further, step 22 includes:
the sanding control unit obtains a parameter D according to the following formula, and generates the control signal according to the parameter D:
D＝[AV+(exp(F)-1)]；
wherein A is acceleration data information, V is speed data information, and F is centripetal force data information;
the sanding control unit obtains acceleration data information according to the following formula:
t is environment temperature information, i is track gradient information, delta T is time increment, delta V is instantaneous speed increment, and the T is obtained by measuring through a speed measuring sensor;
the sanding control unit obtains speed data information according to the following formula:
V＝(V1+V2)/2；
wherein, V1For the first vehicle speed information, obtained by satellite measurements, V2The second vehicle speed information is obtained by measurement of a speed measurement sensor;
the sanding control unit obtains centripetal force data information according to the following formula:
F＝MV2/R；
wherein M is vehicle weight information obtained by measurement of a vehicle weight sensor, and R is track flat curve radius information.
It should be noted that, in the embodiment, the sanding device may be disposed at the bottom of the rail vehicle, and the locomotive monitoring system may be disposed inside the rail vehicle, but the invention is not limited thereto.
Referring to fig. 5, a schematic structural diagram of a sanding system for a rail vehicle according to the present invention is shown. The rail vehicle sanding system as shown in fig. 5 comprises: an LTE-R system 4 and a sanding device 5; the sanding device 5 receives first vehicle speed information, track flat curve radius information, environment temperature information and track gradient information through the LTE-R system 4, the sanding device 5 generates a control signal according to the first vehicle speed information, the track flat curve radius information, the environment temperature information, the track gradient information, vehicle weight information, time increment, instantaneous speed increment and second vehicle speed information, the sanding device 5 acts according to the control signal, and the sanding device 5 outputs current sanding information to the locomotive monitoring system 6 through the LTE-R system 4.
Further, the LTE-R system includes a core network 41 and a base station 42, and the first vehicle speed information, the track flat curve radius information, the environment temperature information, and the track gradient information received by the core network 41 are sent to the sanding device 5 through the base station 42.
The base station 42 includes a baseband unit 421 and a radio remote unit 422, the first vehicle speed information, the track flat curve radius information, the environment temperature information, and the track gradient information received by the core network 41 are sent to the baseband unit 421, the baseband unit 421 sends the received first vehicle speed information, the track flat curve radius information, the environment temperature information, and the track gradient information to the radio remote unit 422, and the radio remote unit 422 sends the received first vehicle speed information, the track flat curve radius information, the environment temperature information, and the track gradient information to the sanding device 5 through the Uu interface 8.
Still further, the sanding device 5 includes a vehicle weight sensor 51, a speed sensor 52, a sanding control unit 53 and a sanding execution unit 54, the vehicle weight sensor 51 and the speed sensor 52 send the vehicle weight information and the second vehicle speed information collected respectively to the sanding control unit 53, the sanding control unit 53 further receives the first vehicle speed information, the track flat curve radius information, the environment temperature information and the track gradient information output by the radio frequency remote unit 422, and the sanding control unit 53 generates a control signal according to the first vehicle speed information, the track flat curve radius information, the environment temperature information, the track gradient information, the vehicle weight information, the time increment, the instantaneous speed increment and the second vehicle speed information to control the sanding operation of the sanding execution unit 54.
Further, the core network 41 includes: the service gateway 411, the PDN gateway 412 and the IP network 413, the base station 42 further includes an S1-u interface 423, the sanding control unit 53 generates sanding information according to a current sanding state, the sanding control unit 53 outputs sanding information to the remote radio unit 422 through the Uu interface 8, the remote radio unit 422 receives and outputs sanding information to the baseband unit 421, the sanding information output by the baseband unit 421 sequentially passes through the S1-u interface 423, the service gateway 411, the PDN gateway 412 and the IP network 413 to the train control application server 61 of the locomotive monitoring system 6, the train control application server 61 stores sanding information, the locomotive monitoring system 6 reads the sanding information stored by the train control application server 61, and thus monitoring the sanding device 5 is performed, and the sanding information includes but is not limited to: the current sanding amount and the current sanding speed of the sanding device 5.
Referring to fig. 6, fig. 6 is a schematic view of an application of the sanding system for a railway vehicle according to the present invention. The structure of the sanding system for a railway vehicle shown in fig. 6 is substantially the same as that of the sanding system for a railway vehicle shown in fig. 5, and therefore the same parts are not repeated herein, and different parts will be described below, in this embodiment, LET-R adopts a distributed architecture, the base station 42 includes one baseband unit 421 and four radio remote units 422, the train 7 includes eight cars 71, the sanding device 5 is disposed at the bottom of each car 71, and the four radio remote units 422 correspond to the first and second cars 71, the third and fourth cars 71, the fifth and sixth cars 71, and the seventh and eighth cars 71, by adopting the distributed architecture, the sanding information output by the three radio remote units 422 can fully cover the sanding device 5 of the whole train, and the sanding information output by the sanding device 5 can also be fully received by the three radio remote units 422, and outputs the signal to the baseband unit 421, but the invention does not limit the number of the baseband unit 421, the remote radio unit 422, the sanding device 5, and the carriage 71, and also does not limit the arrangement of the baseband unit 421, the remote radio unit 422, and the sanding device 5.
In conclusion, the invention realizes the reliable transmission of sanding data and the real-time monitoring of sanding states based on the LTE-R system, realizes the accurate control of sanding operation according to the sanding amount and the sanding speed, and improves the safety of vehicles.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (6)
1. A sanding control method based on an LTE-R system is characterized by comprising the following steps:
step 1: the sanding device receives first vehicle speed information, track flat curve radius information, environment temperature information and track gradient information through an LTE-R system;
step 2: the sanding device generates a control signal according to the first vehicle speed information, the track flat curve radius information, the environment temperature information, the track gradient information, the vehicle weight information, the instantaneous speed increment, the time increment and the second vehicle speed information, and the sanding device acts according to the control signal;
and step 3: the sanding device outputs current sanding information to a locomotive monitoring system through the LTE-R system;
the LTE-R system comprises: the core network and the base station, in the step 1, the first vehicle speed information, the track flat curve radius information, the environment temperature information and the track gradient information received by the core network are sent to the sanding device through the base station;
the base station comprises a baseband unit and a radio remote unit, and the step 1 comprises:
step 11: the baseband unit receives the first vehicle speed information, the track flat curve radius information, the environment temperature information and the track gradient information output by the core network and outputs the information to the radio remote unit;
step 12: the radio remote unit receives the first vehicle speed information, the track flat curve radius information, the environment temperature information and the track gradient information and then outputs the information to the sanding device through a Uu interface;
the sanding device comprises: a sanding control unit and a sanding execution unit, wherein the step 2 comprises the following steps:
step 21: acquiring the vehicle weight information, the instantaneous speed increment and the second vehicle speed information through a sensor;
step 22: the sanding control unit receives and generates the control signal according to the first vehicle speed information, the track flat curve radius information, the environment temperature information, the track gradient information, the vehicle weight information, the instantaneous speed increment, the time increment and the second vehicle speed information;
step 23: and the sanding control unit receives and controls the sanding amount and the sanding speed of the sanding execution unit according to the control signal.
2. A sanding control method according to claim 1, wherein in step 3, the sanding control unit generates the sanding information according to the current sanding state, and the sanding control unit outputs the sanding information to the locomotive monitoring system through the base station and the core network.
3. A sanding control method as defined in claim 1, wherein the core network comprises: the service gateway, the PDN gateway and the IP network, wherein the step 3 comprises the following steps:
step 31: the sanding control unit generates sanding information according to the current sanding state;
step 32: the sanding control unit outputs the sanding information to the remote radio frequency unit through a Uu interface, and the remote radio frequency unit receives and outputs the sanding information to the baseband unit;
step 33: and after receiving the sanding information, the baseband unit outputs the sanding information to the locomotive monitoring system through an S1-u interface, the service gateway, the PDN gateway and the IP network in sequence.
4. A sanding control method as defined in claim 3, wherein said step 22 includes:
the sanding control unit obtains a parameter D according to the following formula, and generates the control signal according to the parameter D:
D＝[AV+(exp(F)-1)]；
wherein A is acceleration data information, V is speed data information, and F is centripetal force data information;
the sanding control unit obtains acceleration data information according to the following formula:
t is environment temperature information, i is track gradient information, delta T is time increment, delta V is instantaneous speed increment, and the T is obtained by measuring through a speed measuring sensor;
the sanding control unit obtains speed data information according to the following formula:
V＝(V1+V2)/2；
wherein, V1For the first vehicle speed information, obtained by satellite measurements, V2The second vehicle speed information is obtained by measuring through a speed measuring sensor;
the sanding control unit obtains centripetal force data information according to the following formula:
F＝MV2/R；
wherein M is vehicle weight information obtained by measurement of a vehicle weight sensor, and R is track flat curve radius information.
5. A sanding control method according to claim 1, characterized in that the sanding information comprises sanding amount information and/or sanding speed information.
6. A rail vehicle sanding system based on the LTE-R system for implementing the sanding control method of any of the preceding claims 1-5, comprising:
an LTE-R system;
the sanding device receives first vehicle speed information, track flat curve radius information, environment temperature information and track gradient information through an LTE-R system, generates a control signal according to the first vehicle speed information, the track flat curve radius information, the environment temperature information, the track gradient information, vehicle weight information, instantaneous speed increment, time increment and second vehicle speed information, acts according to the control signal, and outputs current sanding information to a locomotive monitoring system through the LTE-R system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910917427.0A CN110626362B (en) | 2019-09-26 | 2019-09-26 | Sanding control method based on LTE-R system and rail vehicle sanding system |
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| CN203126895U (en) * | 2012-12-31 | 2013-08-14 | 新铁信达（北京）科技有限公司 | Central centralized type train control system based on long term evolution(LTE)technology |
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