Method of controlling a rail transport system for conveying bulk materials

• US 8,140,202 B2
• Filed: 12/19/2007
• Issued: 03/20/2012
• Est. Priority Date: 12/21/2006
• Status: Active Grant

• Current Assignee: Rail-Veyor Technologies Global, Inc.
• Original Assignee: Rail-Veyor Systems Incorporated
• Inventors: Dibble, Merton F., Capers, Joe
• Primary Examiner(s): Tran, Khoi
• Assistant Examiner(s): Holwerda, Stephen
• Application Number:
  US11/959,950
• Publication Number:
  US 20080154451A1
• Time in Patent Office: 1,553 Days
• Field of Search: 701/20, 104/53, 104/63, 446/429, 472/43, 246/182.R, 246/182.BH, 246/182.C
• US Class Current: 701/20
• CPC Class Codes: B61B 13/127 the propulsion device consisting of stationary driving wheels
• CPC Class Codes: G05D 13/62 characterised by the use of electric means, e.g. use of a tachometric dynamo, use of a transducer converting an electric value into a displacement electric motor control H02P

Abstract

A train is driven by drive stations positioned along a track for frictionally contacting side plates on the train. The drive speed is controlled in response to sensors located at each drive station sensing a position of a wheel and a side plate for confirming a presence of the train. A start command is transmitted from the drive station driving the train to a second drive station downstream when a lead car is within a preselected distance from the second drive station. The drive station at the second drive station is quickly accelerated to a target speed for synchronizing the first drive station with the second drive station. After receiving the train, the second drive station then transmits a stop command to the first drive station for fast decelerating the drive station to a stop.

Claims

1. A method of controlling movement of a train along a track, wherein the train is driven by a plurality of drive stations positioned along the track, and wherein the train includes a lead car and a rear car, each car having wheels for rolling along the track and each car having a side plate thereon, each of the plurality of drive stations having a drive tire positioned for making frictional contact with the side plates at preselected intervals along the track for moving the train along the track, the method comprising:

providing first and second sensors at each of the plurality of drive stations;

positioning the first sensor for sensing a position of each car rolling along the track at the drive station;

positioning the second sensor for sensing a presence of the side plate;

operating a first drive station of the plurality of drive stations for moving the train along the track at a preselected speed;

sensing at least one of the lead car and the rear car;

the first drive station initially accelerating the train at a first acceleration rate of the drive tire to a target speed for the train and driving the train at the target speed toward a second drive station of the plurality of drive stations;

sensing each car as each car of the train passes the first sensor for determining a position of the train relative to the first drive station;

sensing a leading edge of a first side plate carried by the lead car, wherein the leading edge sensing provides a signal confirming the train is present;

transmitting a fast acceleration command signal to the second drive station when the lead car is within a preselected distance from the second drive station, wherein a start signal is initiated based on a train length and a presence thereof resulting from signals from the first and second sensors;

accelerating the drive tire at the second drive station to the target speed at a second acceleration rate responsive to the fast acceleration command signal, the second acceleration rate greater than the first acceleration rate, for synchronizing the first drive station with the second drive station;

receiving the train at the second drive station for continuing to drive the train;

sensing each car of the train as each car passes the first sensor at the second drive station for determining a position of the train relative to the second drive station;

sensing the leading edge of the first side plate by the second sensor at the second drive station for confirming a presence of the train; and

transmitting a stop command to the first drive station for fast decelerating the drive tire of the first drive station to a stop, wherein a deceleration rate for the drive tire decelerating is proximate an absolute value of the second acceleration rate.

2. The method according to claim 1, wherein the target speed comprises one of a load speed, a travel speed, and an unload speed.

3. The method according to claim 1, wherein the movement of the train comprises the train driven by the drive stations at:

a first speed at which the train is loaded;

an acceleration to a second speed for movement of the loaded train downstream for unloading;

a deceleration of the loaded train to a third speed for an unloading thereof;

an acceleration of the unloaded train to the second speed; and

a deceleration of the train to the first speed for again loading the train.

4. The method according to claim 1, wherein sensing each car comprises sensing wheels within the train and providing a wheel count, and wherein the wheel count is used in determining the train position.

5. The method according to claim 1, wherein a gap exists between a trailing edge of a first side plate on one car and a leading edge of a second side plate on an adjacent car, and wherein the gap produces a disruption in a sensing signal provided by the second sensor, the method further comprising the second sensor correcting from the disruption using a debounce circuit for determining that the second side plate is present.

6. The method according to claim 4, wherein a first wheel carried by the lead car is forward a leading edge of the side plate carried by the lead car, thus the sensing of the first wheel by the drive stations occurs before the sensing of the leading edge of the side plate.

7. The method according to claim 1, wherein each of the plurality of drive stations communicates with the first and second sensors for transmitting sensor data to adjacent drive stations, and wherein each drive station is responsive for controlling the speed of the drive tire.

8. The method according to claim 1, wherein the first and second sensors for each of the plurality of drive stations communicates with a central controller, and wherein the central controller monitors operations for each of the drive stations by providing at least one of drive tire speed, train location along the track, and speed of the train.

9. A method of controlling movement of a train along a track, wherein the train is driven by a plurality of drive stations positioned along the track, and wherein the train includes a lead car and a rear car, each car having wheels for rolling along the track and each car having a side plate thereon, each of the plurality of drive stations having a drive tire positioned for making frictional contact with the side plates at preselected intervals along the track for moving the train along the track, the method comprising:

providing first and second sensors at each of the plurality of drive stations;

sensing a position of each car by the first sensor, wherein each car is rolling along the track at the drive station;

sensing a presence of the side plate by the second sensor;

operating a first drive station of the plurality of drive stations, the first drive station moving the train along the track at a preselected speed, wherein the first drive station initially accelerates the train at a first acceleration rate of the drive tire to a target speed for the train and drives the train at the target speed toward a second drive station of the plurality of drive stations;

sensing each car as each car of the train passes the first sensor and determining a position of the train relative to the first drive station;

sensing a leading edge of a first side plate carried by the lead car, wherein the leading edge sensing provides a signal confirming the train is present;

transmitting a fast acceleration command signal to the second drive station when the lead car is within a preselected distance from the second drive station, wherein a start signal to the second drive station is initiated based on a train length and a presence thereof resulting from signals from the first and second sensors;

accelerating the drive tire at the second drive station to the target speed at a second acceleration rate responsive to the fast acceleration command signal, the second acceleration rate greater than the first acceleration rate, and synchronizing the first drive station with the second drive station;

receiving the train at the second drive station; and

continuing to drive the train.

10. The method according to claim 9, further comprising:

sensing each car of the train as each car passes the first sensor at the second drive station and determining a position of the train relative to the second drive station;

sensing the leading edge of the first side plate by the second sensor at the second drive station and confirming a presence of the train; and

transmitting a stop command to the first drive station and decelerating the drive tire of the first drive station to a stop, wherein a deceleration rate for the drive tire decelerating is proximate an absolute value of the second acceleration rate.

11. The method according to claim 10, wherein a gap exists between a trailing edge of a first side plate on one car and a leading edge of a second side plate on an adjacent car, and wherein the gap produces a disruption in a sensing signal provided by the second sensor, the method further comprising the second sensor correcting from the disruption using a debounce circuit and determining that the second side plate is present.

12. The method according to claim 9, wherein the target speed comprises at least one of a load speed, a travel speed, and an unload speed.

13. The method according to claim 9, wherein the movement of the train comprises the train driven by the drive stations at:

a first speed at which the train is loaded;

accelerating to a second speed and moving the loaded train downstream to an unloading location;

decelerating of the loaded train to a third speed and unloading the loaded train;

accelerating of the unloaded train to the second speed; and

decelerating of the train to the first speed and again loading the train.

14. The method according to claim 9, wherein sensing each car comprises sensing wheels within the train and providing a wheel count, and wherein the wheel count is used in determining the train position.

15. The method according to claim 14, wherein a first wheel carried by the lead car is forward a leading edge of the side plate carried by the lead car, thus the sensing of the first wheel by the drive stations occurs before the sensing of the leading edge of the side plate.

16. The method according to claim 9, wherein each of the plurality of drive stations communicates with the first and second sensors and transmits transmitting sensor data to adjacent drive stations, and wherein each drive station controls the speed of the drive tire.

17. The method according to claim 9, wherein the first and second sensors for each of the plurality of drive stations communicate with a central controller, and wherein the central controller monitors operations for each of the drive stations by providing at least one of drive tire speed, train location along the track, and speed of the train.