US20160194017A1 - System for controlling movement of passenger train - Google Patents
System for controlling movement of passenger train Download PDFInfo
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- US20160194017A1 US20160194017A1 US15/067,194 US201615067194A US2016194017A1 US 20160194017 A1 US20160194017 A1 US 20160194017A1 US 201615067194 A US201615067194 A US 201615067194A US 2016194017 A1 US2016194017 A1 US 2016194017A1
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- Prior art keywords
- door
- locomotive
- status
- relay coil
- passenger train
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- 230000003137 locomotive effect Effects 0.000 claims abstract description 78
- 238000010586 diagram Methods 0.000 description 10
- 230000000977 initiatory effect Effects 0.000 description 4
- 238000010248 power generation Methods 0.000 description 4
- 238000012545 processing Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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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
- B61L15/00—Indicators provided on the vehicle or train for signalling purposes
- B61L15/0081—On-board diagnosis or maintenance
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
- B61L27/00—Central railway traffic control systems; Trackside control; Communication systems specially adapted therefor
- B61L27/04—Automatic systems, e.g. controlled by train; Change-over to manual control
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61C—LOCOMOTIVES; MOTOR RAILCARS
- B61C17/00—Arrangement or disposition of parts; Details or accessories not otherwise provided for; Use of control gear and control systems
- B61C17/12—Control gear; Arrangements for controlling locomotives from remote points in the train or when operating in multiple units
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61D—BODY DETAILS OR KINDS OF RAILWAY VEHICLES
- B61D19/00—Door arrangements specially adapted for rail vehicles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61D—BODY DETAILS OR KINDS OF RAILWAY VEHICLES
- B61D19/00—Door arrangements specially adapted for rail vehicles
- B61D19/02—Door arrangements specially adapted for rail vehicles for carriages
- B61D19/026—Safety devices for preventing passengers from being injured by movements of doors or variations in air pressure
Definitions
- the present disclosure relates to a passenger train and more particularly to a system for controlling movement of the passenger train.
- Korean Patent Number 101252542B1 hereinafter referred to as the '542 patent, describes a door control circuit for a train that includes a molded case circuit breaker, a rear train contact relay, a front train contact relay, a door switching switch, a door switching relay, and a door switching contact relay.
- the molded case circuit breaker is arranged in a front train and one end thereof is connected to power.
- One end of the rear train contact relay is connected to the other end of the molded case circuit breaker to maintain a normal closed state.
- One end of the front train contact relay is connected to the other end of the rear train contact relay to maintain a normal opened state.
- the '542 patent aims to simultaneously switch operation of the doors of the train.
- the '542 patent includes two independent circuit for actuating the doors to the opened state and the closed state.
- '542 patent involves two individual feedback loops, thereby rendering the door control circuit complex.
- independent circuits add to the cost of the door control circuit.
- a system for controlling movement of a passenger train includes at least one locomotive and a plurality of doors.
- the system includes at least one door status sensor coupled to each of the plurality of doors of the passenger train and a first control module coupled to the door status sensor.
- the first control module is configured to receive a first input from the door status sensor.
- the first input is indicative of status of each door, the status being one of open and closed.
- the first control module is further configured to indicate to an operator of the at least one locomotive to control the movement of the at least one locomotive when the status of each door is closed.
- the system further includes a relay coil operably coupled to the door status sensor, via a first diode, to receive the first input from the door status sensor.
- the relay coil is energized when the status of each door of the passenger train is closed and the energized relay allows for controlling the movement of the at least one locomotive.
- the system further includes a door override switch adapted to selectively establish a connection with a power source when status of the at least one door is open, to draw power from the power source.
- the system further includes second control module coupled to and the door override switch. The second control module is configured to receive, through the door override switch, power from the power source. The second control module is further configured to indicate to the operator of the at least one locomotive regarding the overriding of the open status of the doors of the passenger train.
- the actuation of the door override switch allows flow of the power to the relay coil through a second diode and the relay coil is energized on receipt of the power from the power source for controlling the movement of the at least one locomotive, and thereby the movement of the passenger train.
- FIG. 1 is a system for controlling movement of a passenger train by controlling movement of a locomotive of the passenger train, according to an embodiment of the present disclosure
- FIG. 2 is a control panel in an operator's cabin of the locomotive of FIG. 1 ;
- FIG. 3 is a circuit diagram of the system of FIG. 1 ;
- FIG. 4 is a circuit diagram for movement of the locomotive in the forward direction and reverse direction.
- FIG. 5 is a circuit diagram for throttling the locomotive and actuating a generator field request in the locomotive.
- FIG. 1 illustrates a system 10 for controlling movement of a passenger train 11 by controlling movement of a locomotive 12 of the passenger train 11 , according to an embodiment of the present disclosure.
- the locomotive 12 includes a power generation unit (not shown) and an operator's cabin 14 .
- the power generation unit includes a power source, such as a diesel engine or power conversion equipment, of a particular capacity to run the locomotive 12 .
- the power generation unit and the operator's cabin 14 are integrated to form a single compartment in the locomotive 12 .
- the operator's cabin 14 includes various control levers and switches to control operation of the locomotive 12 .
- the passenger train 11 may include one or more locomotives 12 , and each locomotive 12 may be equipped with an operator's cabin 14 . Further, the passenger train 11 may also include a cab car (not shown), other than the locomotive 12 , containing an operator's cabin 14 from which the operator could control the passenger train 11 . However, as it would be understood by a person skilled in the art, only one of the operator's cabins 14 would be used to move the passenger train 11 at any given time.
- the passenger train 11 also includes a number of passenger cars and each passenger car 16 includes one or more doors 18 .
- each door 18 includes a pair of movable members 20 , as shown in FIG. 1 .
- the pair of movable members 20 may be slidably disposed in an opening 22 provided in the passenger car 16 .
- the opening 22 defines a space for accommodating the movable members 20 of the door 18 .
- suitable guiding rails (not shown) may be provided at a periphery of the opening 22 .
- the door 18 is adapted to operate between closed ‘C’ and open ‘O’ (not shown) statuses.
- the door 18 allows passengers to enter and exit the passenger car 16 in the open ‘O’ status and restricts movement of passengers from and to the passenger car 16 in the closed ‘C’ status.
- the system 10 of the present disclosure includes at least one door status sensor 24 .
- the at least one door status sensor 24 may be disposed at the periphery of the opening 22 and is coupled to the door 18 , as shown in FIG. 1 .
- the system 10 further includes a relay coil 52 (shown in FIG. 3 ) operably coupled to each of the at least one door status sensor 24 , hereinafter commonly referred to as the door status sensor 24 , via a first diode 56 , as shown in FIG. 3 .
- the relay coil 52 is operably coupled to multiple relay interlocks 54 , as shown in FIG. 4 and FIG. 5 .
- the system 10 includes a first control module 26 operably coupled to the door status sensor 24 .
- the first control module 26 may be connected to the door status sensor 24 through a communication channel 25 that runs across the length of the passenger train 11 .
- the relay coil 52 is connected to the door status sensor 24 , as shown in FIG. 3 .
- the relay coil 52 and its associated relay interlocks 54 are simple electro-mechanical devices that do not use software or machine instruction and do not require programming.
- the first control module 26 may be a processor that includes a single processing unit or a number of processing units, all of which include multiple computing units.
- the explicit use of the term ‘processor’ should not be construed to refer exclusively to hardware capable of executing a software application. Rather, in this example, the first control module 26 may be implemented as one or more microprocessor, microcomputers, digital signal processor, central processing units, state machine, logic circuitries, and/or any device that is capable of manipulating signals based on operational instructions.
- the first control module 26 may also be configured to receive, transmit, and execute computer-readable instructions.
- both the relay coil 52 and the first control module 26 are configured to receive a first input from the door status sensor 24 .
- the first input is indicative of status of each door 18 of the passenger train 11 .
- the status of the door 18 is one of the open ‘O’ and the closed ‘C’.
- the door status sensor 24 may be configured to generate the first input in form of signals and communicate the signals to the first control module 26 . Accordingly, the open ‘O’ and the closed ‘C’ statuses of the door 18 may be represented through different magnitudes of current and voltage in the signals, respectively. Further, the relay coil 52 and the first control module 26 may be pre-fed with such magnitudes of current and voltage to determine the status of the door 18 .
- the first control module 26 is configured to indicate to an operator of the locomotive 12 to control the movement of the locomotive 12 , when the status of each door 18 of the passenger train 11 is closed ‘C’. As illustrated in FIG. 1 , the first control module 26 is disposed in the operator's cabin 14 .
- FIG. 2 illustrates a control panel 28 in the operator's cabin 14 of the locomotive 12 .
- the control panel 28 may be understood as a dashboard on which multiple levers, buttons, and actuating mechanisms are provided to control multiple operations in the locomotive 12 .
- the control panel 28 includes multiple throttle levers 30 , such as the eight throttling levers illustrated in FIG. 2 . Each of these throttle levers 30 aids in throttling the locomotive 12 at a particular speed or power level. In order to throttle the locomotive 12 , the throttle lever 30 is actuated to a particular position, such as towards a windshield 32 of the locomotive 12 .
- the control panel 28 further includes a forward-reverse lever 34 for initiating or controlling movement of the locomotive 12 in a forward direction and a reverse direction.
- the forward-reverse lever 34 is moved in a direction towards the windshield 32 to move the locomotive 12 in the forward direction and in a direction away from the windshield 32 to move the locomotive 12 in the reverse direction.
- the control panel 28 also includes an indication board 36 and a switch board 38 to provide indication to the operator and receive inputs from the operator, respectively.
- the indication board 36 includes a first indicator 40 and a second indicator 42 .
- An indication to the operator is provided by the first indicator 40 when the status of all doors 18 of the passenger train 11 is closed ‘C’.
- an indication to the operator is provided by the second indicator 42 when status of a door override switch 44 is activated.
- the first indicator 40 and the second indicator 42 may glow with individual colors, such as green and red, respectively.
- the control panel 28 includes a generator field request switch 46 provided in the switch board 38 . While the generator field request switch 46 is exposed to the operator for ease in access, the door override switch 44 is sealed, such as in a casing 48 , to prevent any accidental actuation of the door override switch 44 .
- FIG. 3 illustrates a circuit diagram 50 of the system 10 .
- the circuit diagram 50 illustrates an arrangement of components that aid in controlling the movement of the locomotive 12 and thereby controlling movement of the passenger train 11 .
- the circuit illustrated in the circuit diagram 50 is a part of connection that exists between the door status sensor 24 , the relay coil 52 , and the first control module 26 .
- the circuit diagram 50 also illustrates connection between the door override switch 44 , the relay coil 52 , and a second control module 58 , as shown in FIG. 1 .
- the circuit of FIG. 3 may be embedded in the control panel 28 illustrated in FIG. 2 . As such, the output from the circuit is indicated to the operator of the locomotive 12 through the first indicator 40 and the second indicator 42 .
- the circuit diagram 50 is considered in two parts, such as a first part ‘A’ and a second part ‘B’.
- Inputs from the first part ‘A’ and the second part ‘B’ of the circuit is used for controlling, or initiating, the movement of the locomotive 12 as and when the operator wants to move the locomotive 12 .
- the doors 18 of the passenger train 11 need to be closed when the operator desires to move the locomotive 12 .
- the relay coil 52 is energized, and consequently the energized relay coil 52 allows for movement of the locomotive 12 .
- the relay coil 52 is operably coupled to the to the door status sensor 24 to receive the first input from the door status sensor 24 .
- a combination of all the door status sensors 24 is illustrated as a single box in FIG. 3 . Therefore, it should be understood that the first input from all door status sensors 24 is provided to the first control module 26 and to the relay coil 52 .
- the first control module 26 receives the first input from the door status sensor 24 . Accordingly, the first control module 26 indicates to the operator to initiate or control the movement of the locomotive 12 . That is, based on the closed ‘C’ status of the doors 18 , the first control module 26 operates the first indicator 40 to provide an indication to the operator. Upon such indication, the operator can actuate the forward-reverse lever 34 towards the windshield 32 to move the locomotive 12 in the forward direction.
- the door status sensor 24 provides the first input to the relay coil 52 through the first diode 56 .
- the relay coil 52 is energized.
- the relay coil 52 is energized when the status of the doors 18 is closed ‘C’.
- the energized relay coil 52 allows for initiating or controlling the movement of the locomotive 12 . Therefore, even when the operator desires to move the locomotive 12 and has actuated the forward-reverse lever 34 , the throttle lever 30 , and the generator field request switch 46 , the locomotive 12 is moved only when the relay coil 52 is energized.
- the door override switch 44 is provided in the control panel 28 . At the discretion of the operator, the operator may break and open the casing 48 to access the door override switch 44 .
- the second control module 58 is also coupled to the door override switch 44 .
- the actuation of the door override switch 44 overrides the status of the door 18 , thereby forming a closed circuit via a second diode 60 to energize the relay coil 52 , which was otherwise de-energized.
- Such instances of override in the system 10 may be due to, but not limited to, fault in the circuit.
- the door override switch 44 is coupled to a power source 62 .
- Such arrangement allows power to flow from the power source 62 to the relay coil 52 via the second diode 60 . Subsequently, the relay coil 52 is energized by the power and the energized relay coil 52 allows for the movement of the locomotive 12 . Additionally, the power from the power source 62 also flows to the second control module 58 . On receipt of such power, the second control module 58 is configured to indicate to the operator regarding the overriding of the open ‘O’ status of the doors 18 , and to respond to an operator's request to move the locomotive 12 .
- FIG. 4 illustrates a circuit diagram 64 , hereinafter referred to as the circuit 64 , of the system 10 during movement of the locomotive 12 in the forward direction and reverse direction.
- the forward-reverse lever 34 and a direction control module 66 allows the operator to move the locomotive 12 in the forward direction and the reverse direction.
- the movement of the locomotive in the forward direction and the reverse direction is aided by a relay deployed in the system 10 .
- the relay includes two components, namely, the relay coil 52 (as shown in FIG. 3 ) and relay interlock 54 (as shown in FIG. 4 and FIG. 5 ) associated with the relay coil 52 .
- the relay coil 52 as shown in FIG. 3
- relay interlock 54 as shown in FIG. 4 and FIG. 5
- the relay interlock 54 is located in the circuit 64 deployed in the locomotive 12 to allow the forward and the reverse movement of the locomotive 12 when the status of each door 18 is closed ‘C’.
- the presence of the relay interlock 54 in the circuit 64 allows the circuit 64 to be configured to deny an operator's request to move the locomotive 12 when the status of any door 18 of the passenger train 11 is open ‘O’.
- the system 10 includes two relay interlocks in the circuit 64 , both of which are operationally coupled to the relay coil 52 of FIG. 3 .
- the relay interlocks interrupt or restrict flow of forward and reverse direction inputs to the direction control module 66 .
- a forward relay interlock 54 A interrupts flow of forward input to the direction control module 66 when the forward-reverse lever 34 is actuated towards the windshield 32 .
- a reverse relay interlock 54 B interrupts flow of reverse input to the direction control module 66 when the forward-reverse lever 34 is actuated away from the windshield 32 .
- the relay interlocks 54 A and 54 B may be coupled to a traction unit (not shown) that is responsible for movement of the locomotive 12 .
- a forward-control switch 68 closes to indicate the operator's request to move the locomotive 12 in the forward direction
- a reverse-control switch 70 closes to indicate the operator's request to move the locomotive 12 in the reverse direction.
- the forward-control switch 68 and the reverse-control switch 70 are generally in an open condition, thereby causing the circuit 66 to be open at locations at which the forward-control switch 68 and the reverse-control switch 70 are respectively disposed in the circuit 64 .
- relay interlocks 54 A and 54 B are closed, then upon closing of either the forward-control switch 68 or the reverse-control switch 70 , a connection to the direction control module 66 is established and forms a closed circuit. In such an instance, the power from the power source 62 flows through the circuit 66 , thereby allowing movement of the locomotive 12 in the forward or reverse direction, respectively. However, in case the relay interlocks 54 A and 54 B are open, then even upon closing either the forward-control switch 68 or the reverse-control switch 70 , no connection to the direction control module 66 is established, thereby preventing movement of the locomotive 12 in the forward or reverse direction.
- FIG. 5 is a circuit diagram 72 , hereinafter referred to as the circuit 72 , for throttling the locomotive 12 and actuating a generator field request in the locomotive 12 .
- the circuit 72 is considered in two parts, a first part ‘G’ being a generator field request circuit and a second part ‘T’ being a throttle control circuit.
- the first part ‘G’ of the circuit 72 includes the relay interlock 54 , a Generator Field Request (GFR) control module 74 , and a generator field request switch 46 .
- the generator field request switch 46 may be provided on the control panel 28 in a position that is easily accessible by the operator.
- the operator may actuate the generator field request switch 46 to obtain generator field input for initiating or controlling the movement of the locomotive 12 .
- the relay interlock 54 is closed, then actuation of the generator field request switch 46 renders the first part ‘G’ of the circuit 72 , closed.
- the GFR control module 74 allows the power generation unit of the locomotive 12 to produce power for the purpose of moving the locomotive 12 .
- the relay interlock 54 is open, no connection to the GFR control module 74 is established even on actuation of the generator field request switch 46 . As such, movement of the locomotive 12 is prevented.
- the second part ‘T’ of the circuit 72 includes the throttle lever 30 , a throttle control switch 76 and a throttle controlling module 78 .
- the throttle lever 30 may be a single physical lever with a range of positions or settings, and the throttle control switch 76 may be embodied as multiple switches. In such a case, each switch may assist in communicating the operator's speed or power request to the throttle controlling module 78 based on the position of the throttle lever 30 .
- the operator may actuate the throttle lever 30 in order to operate the throttle. Actuation of the throttle lever 30 actuates the throttle control switch 76 .
- the system 10 is implemented in the passenger train 11 having a single operator's cabin 14 and a single locomotive 12 .
- circuit illustrated in FIGS. 3, 4, and 5 includes specific arrangement of devices. These illustrations do not limit the system 10 from having multiple operator's cabins 14 , multiple locomotives 12 , a cab car (not shown), and the ability of the system 10 to control movement of the passenger train 11 in such configurations.
- the present subject matter describes the system 10 for controlling movement of the locomotive 12 and thereby the passenger train 11 .
- the system 10 is based more particularly on the circuit 50 , as illustrated in FIG. 3 .
- the relay coil 52 is energized under two conditions. First, when all doors 18 of the passenger train 11 are closed, and second, when the door override switch 44 is actuated. In case where the door override switch 44 is actuated, power from the power source 62 flows to the relay coil 52 , thereby energizing the relay coil 52 .
- the relay interlocks 54 when closed, allow the operator to control, or initiate, the movement of the locomotive 12 .
- the presence of the relay coil 52 and the relay interlocks 54 in the system 10 of the present disclosure aids in achieving safety measures, which need to be met prior to movement of the passenger train 11 .
- the circuit 50 of the system 10 includes two individual parts coupled to the relay coil 52 . While the first part ‘A’ of the circuit 50 energizes the relay coil 52 in normal condition, that is, when all the doors 18 are closed, the second part ‘B’ of the circuit 50 energizes the relay coil 52 in cases of override.
- the system 10 allows energizing of the relay coil 52 by one part of the circuit 50 only, which was not efficiently managed in convention systems.
- the relay interlocks 54 any inputs from the operator of the locomotive 12 whilst open status of the door 18 , is interrupted. Such arrangement in the system 10 of the present disclosure adds to safety measures.
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Abstract
A system for controlling movement of a passenger train having a locomotive and a plurality of doors is provided. The system includes a door status sensor to determine open and closed status of each door of the locomotive. The system further includes a first control module coupled to the door status sensor and a relay coil through a first diode. The relay coil is energized on receipt of input from the door status sensor, when all doors of the locomotive are closed, and the energized relay coil allows controlling movement of the locomotive. The system further includes a door override switch. In an actuated condition, the door override switch allows power to flow from a power source to the relay coil, thereby energizing the relay coil. The energized relay coil allows controlling movement of the locomotive.
Description
- The present disclosure relates to a passenger train and more particularly to a system for controlling movement of the passenger train.
- With the development of technology, manually and mechanically operated doors of a passenger train are being replaced with electrically and automatically operated doors. As such, operation of the doors of the passenger train needs to be monitored to achieve safety requirements during movement of the passenger train. For example, open condition of the doors during movement of the passenger train may not be safe to the passengers. Accordingly, the doors of the passenger train need to be maintained in a closed condition during movement of the passenger train.
- Korean Patent Number 101252542B1, hereinafter referred to as the '542 patent, describes a door control circuit for a train that includes a molded case circuit breaker, a rear train contact relay, a front train contact relay, a door switching switch, a door switching relay, and a door switching contact relay. The molded case circuit breaker is arranged in a front train and one end thereof is connected to power. One end of the rear train contact relay is connected to the other end of the molded case circuit breaker to maintain a normal closed state. One end of the front train contact relay is connected to the other end of the rear train contact relay to maintain a normal opened state. When doors are opened after a master control key is inserted in the front train, the front train contact relay is converted to a closed state. With such an arrangement, the '542 patent aims to simultaneously switch operation of the doors of the train. However, the '542 patent includes two independent circuit for actuating the doors to the opened state and the closed state. As such, '542 patent involves two individual feedback loops, thereby rendering the door control circuit complex. In addition, such independent circuits add to the cost of the door control circuit.
- In an aspect of the present disclosure, a system for controlling movement of a passenger train is provided. The passenger train includes at least one locomotive and a plurality of doors. The system includes at least one door status sensor coupled to each of the plurality of doors of the passenger train and a first control module coupled to the door status sensor. The first control module is configured to receive a first input from the door status sensor. The first input is indicative of status of each door, the status being one of open and closed. The first control module is further configured to indicate to an operator of the at least one locomotive to control the movement of the at least one locomotive when the status of each door is closed. The system further includes a relay coil operably coupled to the door status sensor, via a first diode, to receive the first input from the door status sensor. The relay coil is energized when the status of each door of the passenger train is closed and the energized relay allows for controlling the movement of the at least one locomotive. The system further includes a door override switch adapted to selectively establish a connection with a power source when status of the at least one door is open, to draw power from the power source. The system further includes second control module coupled to and the door override switch. The second control module is configured to receive, through the door override switch, power from the power source. The second control module is further configured to indicate to the operator of the at least one locomotive regarding the overriding of the open status of the doors of the passenger train. The actuation of the door override switch allows flow of the power to the relay coil through a second diode and the relay coil is energized on receipt of the power from the power source for controlling the movement of the at least one locomotive, and thereby the movement of the passenger train.
- Other features and aspects of this disclosure will be apparent from the following description and the accompanying drawings.
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FIG. 1 is a system for controlling movement of a passenger train by controlling movement of a locomotive of the passenger train, according to an embodiment of the present disclosure; -
FIG. 2 is a control panel in an operator's cabin of the locomotive ofFIG. 1 ; -
FIG. 3 is a circuit diagram of the system ofFIG. 1 ; -
FIG. 4 is a circuit diagram for movement of the locomotive in the forward direction and reverse direction; and -
FIG. 5 is a circuit diagram for throttling the locomotive and actuating a generator field request in the locomotive. - Reference will now be made in detail to specific embodiments or features, examples of which are illustrated in the accompanying drawings. Wherever possible, corresponding or similar reference numbers will be used throughout the drawings to refer to the same or corresponding parts. Moreover, references to various elements described herein, are made collectively or individually when there may be more than one element of the same type. However, such references are merely exemplary in nature. It may be noted that any reference to elements in the singular may also be construed to relate to the plural and vice-versa without limiting the scope of the disclosure to the exact number or type of such elements unless set forth explicitly in the appended claims.
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FIG. 1 illustrates asystem 10 for controlling movement of apassenger train 11 by controlling movement of alocomotive 12 of thepassenger train 11, according to an embodiment of the present disclosure. However, it will be understood that thesystem 10 may be implemented in other trains as well, such as a train that is employed for transporting materials in and out of a worksite, for example, a mining site. Thelocomotive 12 includes a power generation unit (not shown) and an operator'scabin 14. The power generation unit includes a power source, such as a diesel engine or power conversion equipment, of a particular capacity to run thelocomotive 12. The power generation unit and the operator'scabin 14 are integrated to form a single compartment in thelocomotive 12. The operator'scabin 14 includes various control levers and switches to control operation of thelocomotive 12. An operator occupies the operator'scabin 14 to access the various control levers. Additionally, it will be understood that thepassenger train 11 may include one ormore locomotives 12, and eachlocomotive 12 may be equipped with an operator'scabin 14. Further, thepassenger train 11 may also include a cab car (not shown), other than thelocomotive 12, containing an operator'scabin 14 from which the operator could control thepassenger train 11. However, as it would be understood by a person skilled in the art, only one of the operator'scabins 14 would be used to move thepassenger train 11 at any given time. - The
passenger train 11 also includes a number of passenger cars and eachpassenger car 16 includes one ormore doors 18. As would be known to a person skilled in the art, eachdoor 18 includes a pair ofmovable members 20, as shown inFIG. 1 . For instance, the pair ofmovable members 20 may be slidably disposed in anopening 22 provided in thepassenger car 16. Theopening 22 defines a space for accommodating themovable members 20 of thedoor 18. In order to facilitate the sliding movement of themovable members 20, suitable guiding rails (not shown) may be provided at a periphery of theopening 22. As such, thedoor 18 is adapted to operate between closed ‘C’ and open ‘O’ (not shown) statuses. Thedoor 18 allows passengers to enter and exit thepassenger car 16 in the open ‘O’ status and restricts movement of passengers from and to thepassenger car 16 in the closed ‘C’ status. - For the purpose of determining the open ‘O’ and the closed ‘C’ statuses of the
door 18, thesystem 10 of the present disclosure includes at least onedoor status sensor 24. The at least onedoor status sensor 24 may be disposed at the periphery of theopening 22 and is coupled to thedoor 18, as shown inFIG. 1 . Thesystem 10 further includes a relay coil 52 (shown inFIG. 3 ) operably coupled to each of the at least onedoor status sensor 24, hereinafter commonly referred to as thedoor status sensor 24, via afirst diode 56, as shown inFIG. 3 . Therelay coil 52 is operably coupled tomultiple relay interlocks 54, as shown inFIG. 4 andFIG. 5 . Additionally, thesystem 10 includes afirst control module 26 operably coupled to thedoor status sensor 24. In an example, thefirst control module 26 may be connected to thedoor status sensor 24 through acommunication channel 25 that runs across the length of thepassenger train 11. Similarly, therelay coil 52 is connected to thedoor status sensor 24, as shown inFIG. 3 . - In one example, the
relay coil 52 and its associated relay interlocks 54 (as shown inFIG. 4 andFIG. 5 ) are simple electro-mechanical devices that do not use software or machine instruction and do not require programming. On the other hand, thefirst control module 26 may be a processor that includes a single processing unit or a number of processing units, all of which include multiple computing units. The explicit use of the term ‘processor’ should not be construed to refer exclusively to hardware capable of executing a software application. Rather, in this example, thefirst control module 26 may be implemented as one or more microprocessor, microcomputers, digital signal processor, central processing units, state machine, logic circuitries, and/or any device that is capable of manipulating signals based on operational instructions. Among the capabilities mentioned herein, thefirst control module 26 may also be configured to receive, transmit, and execute computer-readable instructions. - As such, both the
relay coil 52 and thefirst control module 26 are configured to receive a first input from thedoor status sensor 24. The first input is indicative of status of eachdoor 18 of thepassenger train 11. As mentioned earlier, the status of thedoor 18 is one of the open ‘O’ and the closed ‘C’. Thedoor status sensor 24 may be configured to generate the first input in form of signals and communicate the signals to thefirst control module 26. Accordingly, the open ‘O’ and the closed ‘C’ statuses of thedoor 18 may be represented through different magnitudes of current and voltage in the signals, respectively. Further, therelay coil 52 and thefirst control module 26 may be pre-fed with such magnitudes of current and voltage to determine the status of thedoor 18. Although the description herein provides a manner in which thedoor status sensor 24, therelay coil 52, and thefirst control module 26 aid in determining the status of thedoor 18, it should be understood that implementation of current and voltage of the first signal is for the mere purpose of description and should not be construed as limitation. It will be understood to the person skilled in the art that various other ways of determining the status of thedoor 18 may be employed, albeit with few variations to the embodiment described herein. - Further, the
first control module 26 is configured to indicate to an operator of the locomotive 12 to control the movement of the locomotive 12, when the status of eachdoor 18 of thepassenger train 11 is closed ‘C’. As illustrated inFIG. 1 , thefirst control module 26 is disposed in the operator'scabin 14. -
FIG. 2 illustrates acontrol panel 28 in the operator'scabin 14 of the locomotive 12. Thecontrol panel 28 may be understood as a dashboard on which multiple levers, buttons, and actuating mechanisms are provided to control multiple operations in the locomotive 12. Thecontrol panel 28 includes multiple throttle levers 30, such as the eight throttling levers illustrated inFIG. 2 . Each of these throttle levers 30 aids in throttling the locomotive 12 at a particular speed or power level. In order to throttle the locomotive 12, thethrottle lever 30 is actuated to a particular position, such as towards awindshield 32 of the locomotive 12. - The
control panel 28 further includes a forward-reverse lever 34 for initiating or controlling movement of the locomotive 12 in a forward direction and a reverse direction. The forward-reverse lever 34 is moved in a direction towards thewindshield 32 to move the locomotive 12 in the forward direction and in a direction away from thewindshield 32 to move the locomotive 12 in the reverse direction. Thecontrol panel 28 also includes anindication board 36 and aswitch board 38 to provide indication to the operator and receive inputs from the operator, respectively. - The
indication board 36 includes afirst indicator 40 and asecond indicator 42. An indication to the operator is provided by thefirst indicator 40 when the status of alldoors 18 of thepassenger train 11 is closed ‘C’. Similarly, an indication to the operator is provided by thesecond indicator 42 when status of adoor override switch 44 is activated. In an example, thefirst indicator 40 and thesecond indicator 42 may glow with individual colors, such as green and red, respectively. In addition to thedoor override switch 44, thecontrol panel 28 includes a generatorfield request switch 46 provided in theswitch board 38. While the generatorfield request switch 46 is exposed to the operator for ease in access, thedoor override switch 44 is sealed, such as in acasing 48, to prevent any accidental actuation of thedoor override switch 44. -
FIG. 3 illustrates a circuit diagram 50 of thesystem 10. Particularly, the circuit diagram 50 illustrates an arrangement of components that aid in controlling the movement of the locomotive 12 and thereby controlling movement of thepassenger train 11. The circuit illustrated in the circuit diagram 50 is a part of connection that exists between thedoor status sensor 24, therelay coil 52, and thefirst control module 26. The circuit diagram 50 also illustrates connection between thedoor override switch 44, therelay coil 52, and asecond control module 58, as shown inFIG. 1 . In an example, the circuit ofFIG. 3 may be embedded in thecontrol panel 28 illustrated inFIG. 2 . As such, the output from the circuit is indicated to the operator of the locomotive 12 through thefirst indicator 40 and thesecond indicator 42. For the purpose of convenience in description, the circuit diagram 50 is considered in two parts, such as a first part ‘A’ and a second part ‘B’. - Inputs from the first part ‘A’ and the second part ‘B’ of the circuit is used for controlling, or initiating, the movement of the locomotive 12 as and when the operator wants to move the locomotive 12. However, in order to move the locomotive 12, the
doors 18 of thepassenger train 11 need to be closed when the operator desires to move the locomotive 12. Based on the inputs from the first part ‘A’ and the second part ‘B’ of the circuit, therelay coil 52 is energized, and consequently the energizedrelay coil 52 allows for movement of the locomotive 12. - As mentioned earlier, the
relay coil 52 is operably coupled to the to thedoor status sensor 24 to receive the first input from thedoor status sensor 24. A combination of all thedoor status sensors 24 is illustrated as a single box inFIG. 3 . Therefore, it should be understood that the first input from alldoor status sensors 24 is provided to thefirst control module 26 and to therelay coil 52. When status of alldoors 18 of thepassenger train 11 is closed ‘C’, thefirst control module 26 receives the first input from thedoor status sensor 24. Accordingly, thefirst control module 26 indicates to the operator to initiate or control the movement of the locomotive 12. That is, based on the closed ‘C’ status of thedoors 18, thefirst control module 26 operates thefirst indicator 40 to provide an indication to the operator. Upon such indication, the operator can actuate the forward-reverse lever 34 towards thewindshield 32 to move the locomotive 12 in the forward direction. - Simultaneously, the
door status sensor 24 provides the first input to therelay coil 52 through thefirst diode 56. On receipt of the first input, therelay coil 52 is energized. In other words, therelay coil 52 is energized when the status of thedoors 18 is closed ‘C’. Further, the energizedrelay coil 52 allows for initiating or controlling the movement of the locomotive 12. Therefore, even when the operator desires to move the locomotive 12 and has actuated the forward-reverse lever 34, thethrottle lever 30, and the generatorfield request switch 46, the locomotive 12 is moved only when therelay coil 52 is energized. - As described earlier, the
door override switch 44 is provided in thecontrol panel 28. At the discretion of the operator, the operator may break and open thecasing 48 to access thedoor override switch 44. Thesecond control module 58 is also coupled to thedoor override switch 44. The actuation of thedoor override switch 44 overrides the status of thedoor 18, thereby forming a closed circuit via a second diode 60 to energize therelay coil 52, which was otherwise de-energized. Such instances of override in thesystem 10 may be due to, but not limited to, fault in the circuit. As illustrated inFIG. 3 , thedoor override switch 44 is coupled to apower source 62. Such arrangement allows power to flow from thepower source 62 to therelay coil 52 via the second diode 60. Subsequently, therelay coil 52 is energized by the power and the energizedrelay coil 52 allows for the movement of the locomotive 12. Additionally, the power from thepower source 62 also flows to thesecond control module 58. On receipt of such power, thesecond control module 58 is configured to indicate to the operator regarding the overriding of the open ‘O’ status of thedoors 18, and to respond to an operator's request to move the locomotive 12. - Although the description herein recites two individual control modules, such as the
first control module 26 and thesecond control module 58, it will be appreciated by the person skilled in the art that a single control module may be configured to perform the functions of both thefirst control module 26 and thesecond control module 58. -
FIG. 4 illustrates a circuit diagram 64, hereinafter referred to as thecircuit 64, of thesystem 10 during movement of the locomotive 12 in the forward direction and reverse direction. As mentioned inFIG. 2 , the forward-reverse lever 34 and adirection control module 66 allows the operator to move the locomotive 12 in the forward direction and the reverse direction. The movement of the locomotive in the forward direction and the reverse direction is aided by a relay deployed in thesystem 10. The relay includes two components, namely, the relay coil 52 (as shown inFIG. 3 ) and relay interlock 54 (as shown inFIG. 4 andFIG. 5 ) associated with therelay coil 52. As illustrated inFIG. 4 , therelay interlock 54 is located in thecircuit 64 deployed in the locomotive 12 to allow the forward and the reverse movement of the locomotive 12 when the status of eachdoor 18 is closed ‘C’. The presence of therelay interlock 54 in thecircuit 64 allows thecircuit 64 to be configured to deny an operator's request to move the locomotive 12 when the status of anydoor 18 of thepassenger train 11 is open ‘O’. - In an example implementation, the
system 10 includes two relay interlocks in thecircuit 64, both of which are operationally coupled to therelay coil 52 ofFIG. 3 . The relay interlocks interrupt or restrict flow of forward and reverse direction inputs to thedirection control module 66. For example, aforward relay interlock 54A interrupts flow of forward input to thedirection control module 66 when the forward-reverse lever 34 is actuated towards thewindshield 32. Similarly, areverse relay interlock 54B interrupts flow of reverse input to thedirection control module 66 when the forward-reverse lever 34 is actuated away from thewindshield 32. In said example, the relay interlocks 54A and 54B may be coupled to a traction unit (not shown) that is responsible for movement of the locomotive 12. - In operation, when the operator has actuated the forward-
reverse lever 34 towards thewindshield 32, a forward-control switch 68 closes to indicate the operator's request to move the locomotive 12 in the forward direction Likewise, when the operator has actuated the forward-reverse lever 34 away from thewindshield 32, a reverse-control switch 70 closes to indicate the operator's request to move the locomotive 12 in the reverse direction. The forward-control switch 68 and the reverse-control switch 70 are generally in an open condition, thereby causing thecircuit 66 to be open at locations at which the forward-control switch 68 and the reverse-control switch 70 are respectively disposed in thecircuit 64. If the relay interlocks 54A and 54B are closed, then upon closing of either the forward-control switch 68 or the reverse-control switch 70, a connection to thedirection control module 66 is established and forms a closed circuit. In such an instance, the power from thepower source 62 flows through thecircuit 66, thereby allowing movement of the locomotive 12 in the forward or reverse direction, respectively. However, in case the relay interlocks 54A and 54B are open, then even upon closing either the forward-control switch 68 or the reverse-control switch 70, no connection to thedirection control module 66 is established, thereby preventing movement of the locomotive 12 in the forward or reverse direction. -
FIG. 5 is a circuit diagram 72, hereinafter referred to as thecircuit 72, for throttling the locomotive 12 and actuating a generator field request in the locomotive 12. For the purpose of description, thecircuit 72 is considered in two parts, a first part ‘G’ being a generator field request circuit and a second part ‘T’ being a throttle control circuit. The first part ‘G’ of thecircuit 72 includes therelay interlock 54, a Generator Field Request (GFR)control module 74, and a generatorfield request switch 46. In one example, the generatorfield request switch 46 may be provided on thecontrol panel 28 in a position that is easily accessible by the operator. The operator may actuate the generatorfield request switch 46 to obtain generator field input for initiating or controlling the movement of the locomotive 12. In case therelay interlock 54 is closed, then actuation of the generatorfield request switch 46 renders the first part ‘G’ of thecircuit 72, closed. In such a condition, theGFR control module 74 allows the power generation unit of the locomotive 12 to produce power for the purpose of moving the locomotive 12. However, in case therelay interlock 54 is open, no connection to theGFR control module 74 is established even on actuation of the generatorfield request switch 46. As such, movement of the locomotive 12 is prevented. - Further, the second part ‘T’ of the
circuit 72 includes thethrottle lever 30, athrottle control switch 76 and athrottle controlling module 78. As would be known to a person skilled in the art, thethrottle lever 30 may be a single physical lever with a range of positions or settings, and thethrottle control switch 76 may be embodied as multiple switches. In such a case, each switch may assist in communicating the operator's speed or power request to thethrottle controlling module 78 based on the position of thethrottle lever 30. In one example, in order to operate the throttle, the operator may actuate thethrottle lever 30. Actuation of thethrottle lever 30 actuates thethrottle control switch 76. In case therelay interlock 54 is closed, then actuation of thethrottle control switch 76 allows flow of power from thepower source 62 to thethrottle controlling module 78, thereby allowing movement of the locomotive 12 at a particular power level or speed. However, in case therelay interlock 54 is open, no connection to thethrottle controlling module 78 is established even on actuation of thethrottle control switch 76. As such, movement of the locomotive 12 is prevented. - Although the present disclosure has been described in language specific to few devices and/or methods, it should be understood that the embodiments disclosed herein are for an illustrative and explanatory sense, and in no way limit the scope of the present disclosure. For example, the
system 10 is implemented in thepassenger train 11 having a single operator'scabin 14 and asingle locomotive 12. Further, circuit illustrated inFIGS. 3, 4, and 5 includes specific arrangement of devices. These illustrations do not limit thesystem 10 from having multiple operator'scabins 14,multiple locomotives 12, a cab car (not shown), and the ability of thesystem 10 to control movement of thepassenger train 11 in such configurations. - The present subject matter describes the
system 10 for controlling movement of the locomotive 12 and thereby thepassenger train 11. Thesystem 10 is based more particularly on thecircuit 50, as illustrated inFIG. 3 . As described earlier with reference toFIG. 3 ,FIG. 4 andFIG. 5 , therelay coil 52 is energized under two conditions. First, when alldoors 18 of thepassenger train 11 are closed, and second, when thedoor override switch 44 is actuated. In case where thedoor override switch 44 is actuated, power from thepower source 62 flows to therelay coil 52, thereby energizing therelay coil 52. The relay interlocks 54, when closed, allow the operator to control, or initiate, the movement of the locomotive 12. As such, the presence of therelay coil 52 and the relay interlocks 54 in thesystem 10 of the present disclosure aids in achieving safety measures, which need to be met prior to movement of thepassenger train 11. - In Particular, the
circuit 50 of thesystem 10 includes two individual parts coupled to therelay coil 52. While the first part ‘A’ of thecircuit 50 energizes therelay coil 52 in normal condition, that is, when all thedoors 18 are closed, the second part ‘B’ of thecircuit 50 energizes therelay coil 52 in cases of override. Thus, thesystem 10 allows energizing of therelay coil 52 by one part of thecircuit 50 only, which was not efficiently managed in convention systems. In addition, owing to the presence of the relay interlocks 54, any inputs from the operator of the locomotive 12 whilst open status of thedoor 18, is interrupted. Such arrangement in thesystem 10 of the present disclosure adds to safety measures. - While aspects of the present disclosure have been particularly shown and described with reference to the embodiments above, it will be understood by those skilled in the art that various additional embodiments may be contemplated by the modification of the disclosed machines, systems and methods without departing from the spirit and scope of what is disclosed. Such embodiments should be understood to fall within the scope of the present disclosure as determined based upon the claims and any equivalents thereof.
Claims (1)
1. A system for controlling movement of a passenger train, the passenger train comprising at least one locomotive and a plurality of doors, the system comprising:
at least one door status sensor coupled to each of the plurality of doors of the passenger train;
a first control module operably coupled to the at least one door status sensor, the first control module is configured to:
receive a first input from the at least one door status sensor, the first input being indicative of status of each door, the status being one of open and closed; and
indicate to an operator of the at least one locomotive to control the movement of the at least one locomotive when the status of each door is closed;
a relay coil operably coupled to at least one door status sensor, via a first diode, to receive the first input from at least one door status sensor, wherein the relay coil is energized when the status of each door of the passenger train is closed, and wherein the energized relay coil allows controlling movement of the at least one locomotive;
a door override switch adapted to selectively establish a connection with a power source when status of at least one door is open, to draw power from the power source; and
a second control module coupled to the door status override sensor and the door override switch, the second control module configured to:
receive, through the door override switch, power from the power source; and
indicate to the operator of the at least one locomotive regarding the overriding of the open status of the door of the passenger train,
wherein the actuation of the door override switch allows flow of the power to the relay coil via a second diode, wherein the relay coil is energized on receipt of the power from the power source for controlling the movement of the at least one locomotive.
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US15/067,194 US20160194017A1 (en) | 2016-03-11 | 2016-03-11 | System for controlling movement of passenger train |
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US15/067,194 US20160194017A1 (en) | 2016-03-11 | 2016-03-11 | System for controlling movement of passenger train |
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US15/067,194 Abandoned US20160194017A1 (en) | 2016-03-11 | 2016-03-11 | System for controlling movement of passenger train |
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Cited By (14)
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---|---|---|---|---|
US20180217545A1 (en) * | 2015-10-29 | 2018-08-02 | Hewlett-Packard Development Company, L.P. | Interlock circuit |
US11194280B2 (en) * | 2015-10-29 | 2021-12-07 | Hewlett-Packard Development Company, L.P. | Interlock circuit |
US10919552B2 (en) * | 2017-09-15 | 2021-02-16 | Siemens Mobility GmbH | Method for determining an embarking/disembarking duration of an object |
CN108297897A (en) * | 2017-12-28 | 2018-07-20 | 东南大学 | A kind of rail vehicle transportation control method and system |
JP2020075633A (en) * | 2018-11-08 | 2020-05-21 | ナブテスコ株式会社 | Notification device and door opening/closing device |
EP3656642A3 (en) * | 2018-11-08 | 2020-09-16 | Nabtesco Corporation | Notification device and door opening-closing device |
TWI747066B (en) * | 2018-11-08 | 2021-11-21 | 日商納博特斯克股份有限公司 | Notification device and door switch device |
CN111152807A (en) * | 2018-11-08 | 2020-05-15 | 纳博特斯克有限公司 | Notification device and door opening/closing device |
US11447999B2 (en) | 2018-11-08 | 2022-09-20 | Nabtesco Corporation | Notification device and door opening-closing device |
JP7220056B2 (en) | 2018-11-08 | 2023-02-09 | ナブテスコ株式会社 | Notification device and door operator |
US20200208465A1 (en) * | 2018-12-26 | 2020-07-02 | Nabtesco Corporation | Door control device |
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EP3674171A1 (en) * | 2018-12-26 | 2020-07-01 | Nabtesco Corporation | Door control device |
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