Haulage Motor Optimization, Scheduling, Decision-making and Analysis System

System Introduction:

Electric locomotive takes on the task of primary long-distance transportation in mine production. Traffic dispatching in each station monitors locomotive tasks in its span of control via a computer interlock console display screen and telephone. Since the computer interlocking control area is limited, once the operating locomotives exceed the site (area) of the computer interlocking control area, it can only be carried out by wireless telephone and the production command is also sent down by telephone, and this status has not satisfied the production requirement. Utilizing GPS precision location technology, GPRS wireless communication and microcomputer technology, the decision-making analysis system for optimized electric locomotive dispatching establishes an electric locomotive production and dispatching system gathered location, wireless communication, communication by telephone and intellectual dispatching. The main system functions are:

1. It utilizes a GPS precision location technology to provide the real-time locomotive location;
2. It establishes a switchyard electric map, which displays locomotive position and operation in both a car PC and a large-screen control room;
3. Wireless transmission of shunting command and operation data, performs relevant prompts and warnings to driver;
4. According to the shunting operation plan, it sends shunting operation commands to the shunting machine;
5. Keeps a full record of operation and communication data.

Control Purpose:

1.Enlarge the monitoring range of electric locomotive

Before this application, the operating locomotive view range was small because the microcomputer interlock control area was narrow. Locomotive location system provides a full-time-domain to traffic dispatching in each station, and obtains all-day continuous locomotive data on location and speed etc. in precinct, ensures the traffic dispatcher can obtain the operation schedule for each locomotive at any moment. In this way, the traffic dispatcher is able to monitor each locomotive operation in a timely and accurate way via locomotive location system and wireless walkie-talkies, thereby improving the capability of railway production.

2. Improves the transmission capacity of railway restricted throats.

A part of the railway switch and signal in stations have accomplished microcomputer interlock control, however, in the operation range of a certain restricted throat area, not all locomotives are in the microcomputer interlock control area. The monitoring system for locomotive location provides the accurate position and running speed etc. of each operation locomotive, which ensures the traffic dispatcher finds out each locomotive operation schedule immediately. In this way, the traffic dispatcher can arrange each locomotive to pass through restricted throats systematically, reducing locomotive queue probability and improving restricted throat overpass capacity.

3. Production dispatching optimization

The center control system communicates with each locomotive in real-time, keeps track of each locomotive production status, sends shunting operation commands to the shunting locomotive according to its operation schedule, replays all operation processes and computes statistics and analysis of operation data for each locomotive. Finally, it creates a traffic diagram and production reports. It is also able to determine unreasonable parts in a locomotive operation, and improve its solution to achieve the purpose of production dispatching optimization.

4. Improve locomotive operation efficiency, and reduce application number and transportation cost

Previously, due to limitations in monitoring technology, the chief dispatcher of railway transportation could only monitor the locomotives operating in individual restricted throat area but not all the locomotives, and could only determine locomotive movement by telephone (or obstruction). Locomotive monitoring systems with satellite positioning, provides a new platform to the broaden monitoring range for the chief dispatcher of railway transportation allowing the dispatcher to command traffic dispatching from an overall vantage point, ensure effective operation of all transportation locomotive, thus allowing him or her to monitor all locomotive operation at once, and overcomes the constraint of protection and self departmentalism in each station. It accomplishes wireless data communication between the dispatching center and the locomotive, the combination improves locomotive operation efficiency greatly.

5. Reduce traffic accident

It provides the location and speed of each locomotive all-day in continuous real-time, ensuring the probability of standard operation examination by inspectors, such as whether the locomotive decelerates when it passes through a crossing, or whether it takes a parking examination when it enters a workshop (ever take parking), or whether it occupies the main crossing in shift time etc. Because this "eye "gazes at the locomotive operation, drivers self-consciously operate in standardized ways, thereby reducing traffic accidents and providing a credible method of accident analysis.

System Composition:

It is composed of a vehicle terminal subsystem, wireless communication subsystem, and control center subsystem.

(1)Composition of vehicle terminal system

The vehicle terminal system is composed of a vehicle microcomputer host and display. Its host contains a GPRS wireless communication system, color touch-screen, precision location GPS system, minitype computer, telephone communication system and switching voltage-stabilized power supply. The control command of vehicle terminal receives control center system sends relative locomotive working status information to the control center system. The vehicle terminal communicates with the control center and gives dynamic data required by the shunting operation (locomotive location diagram in switchyard, limited speed and real speed, shunting signal condition, shunting command, shunting operation list and production transformation).

(2) Composition of wireless communication subsystem

It adopts public network GSM communication or self-built MESH special network communication.

Public network GSM communications adopt GPRS or CDMA communication methods and needs no communication tower. The vehicle terminal equipment integrates a GPRS or CDMA module. The start-up cost is low.

The self-built MESH special network needs to establish a communication base station along the track, providing the communication for the vehicle terminal and control center. It has some start-up cost, however the high network bandwidth and simple maintenance can satisfy the requirements for video transmission.

(3) Composition of the control center system

The control center system contains a GPS satellite ground differential station, monitor scheduling computer, monitor center large screen, wireless communication equipment (GPRS) and telephone communication console. The control center computer is the core equipment that connects the dispatching control room and electric locomotive. It sends different shunting operation information by receiving the electric locomotive number and tracking its location when many locomotives carry through the shunting operation in station yards, and ensures shunting operation safety. The monitor computer displays the shunting signal status in a station yard, the occupancy of railway circuits, the location of the shunting locomotive, and the shunting operation list, etc. Wireless communication equipment establishes data communication with the vehicle microcomputer. The satellite ground differential station improves the locomotive location precision on the sub-meter. The precision of ground location identification is between 8-10 meters if it adopts a non-differential satellite position system. It is unable to identify the location of railway locomotives accurately. However, after adopting the satellite ground differential station, the precision of locomotive location achieves meter level, and identify its accurate location in the shunting station. A satellite ground differential station can cover a 10 km radius area, satisfying the shunting operation requirement in grouping stations. The monitor center's large screen observes the shunting operation in a grouping station for the dispatcher. The telephone console takes charge of voice communication with each machine station.

Function Characteristic:

1. Real-time locomotive monitor

It monitors real-time locomotive location, motion state, velocity, carriage number and style via GIS diagram dispatching terminal software. Different carriages are shown by different icons as follows:

It also enlarges the display range of the map, monitoring the production status from a more macroscopically view.

2. Signal lamp and turnout status display

It displays a signal lamp and turnout status in the GIS map vividly. Little icons express signal lamps; different color expresses different status. The display uses a different color railway line to express location and position status as follows:


3.Production scheduling

It sends down various scheduling commands according to real locomotive status and production plan requirements, on the basis of real site production flow. It requires the following operations by the driver:

1) Driver logging on
2) Driver exit
3) Duty shifts
4) Pick up or hang up the phone
5) Locomotive fault
6) Locomotive delay
7) Locomotive ready
8) Loading information
9) Unloading information

This system exhibits all production and scheduling information in a traffic diagram on locomotive arrival and departure information as follows:

4. Object tracking

This means it will lock onto a certain locomotive, and keep it in the center of the monitoring window at all times. The map will move as the locomotive moves.

5. Dynamic track replay

You can choose a certain locomotive and time period, and replay the historic track at the time. You can utilize the control keys to play, stop, pause, fast forward, fast rewind, and shift.

6. Statistics on transportation quantity and mileage

It uses a certain vehicle number and time period to determine statistics on transportation quantity, that's about running distance and creates a report and prints it.

7. Telephone communication function

It is able to establish voice communication between the telephone station and locomotive, and also between locomotives. Interface as follows:

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