GB2491972A - Brake information module having a bistable display to display operational data, even without power - Google Patents

Brake information module having a bistable display to display operational data, even without power Download PDF

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Publication number
GB2491972A
GB2491972A GB1210554.0A GB201210554A GB2491972A GB 2491972 A GB2491972 A GB 2491972A GB 201210554 A GB201210554 A GB 201210554A GB 2491972 A GB2491972 A GB 2491972A
Authority
GB
United Kingdom
Prior art keywords
display
information module
data
brake control
vehicle
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
GB1210554.0A
Other versions
GB201210554D0 (en
GB2491972B (en
Inventor
Justin Peare
Ross Bradley
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Knorr Bremse Rail Systems UK Ltd
Original Assignee
Knorr Bremse Rail Systems UK Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Knorr Bremse Rail Systems UK Ltd filed Critical Knorr Bremse Rail Systems UK Ltd
Publication of GB201210554D0 publication Critical patent/GB201210554D0/en
Publication of GB2491972A publication Critical patent/GB2491972A/en
Application granted granted Critical
Publication of GB2491972B publication Critical patent/GB2491972B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T17/00—Component parts, details, or accessories of power brake systems not covered by groups B60T8/00, B60T13/00 or B60T15/00, or presenting other characteristic features
    • B60T17/18—Safety devices; Monitoring
    • B60T17/22—Devices for monitoring or checking brake systems; Signal devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T17/00—Component parts, details, or accessories of power brake systems not covered by groups B60T8/00, B60T13/00 or B60T15/00, or presenting other characteristic features
    • B60T17/18—Safety devices; Monitoring
    • B60T17/22—Devices for monitoring or checking brake systems; Signal devices
    • B60T17/228—Devices for monitoring or checking brake systems; Signal devices for railway vehicles
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/137—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering
    • G02F1/13718—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering based on a change of the texture state of a cholesteric liquid crystal
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/04—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of a single character by selection from a plurality of characters, or by composing the character by combination of individual elements, e.g. segments using a combination of such display devices for composing words, rows or the like, in a frame with fixed character positions
    • G09G3/16—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of a single character by selection from a plurality of characters, or by composing the character by combination of individual elements, e.g. segments using a combination of such display devices for composing words, rows or the like, in a frame with fixed character positions by control of light from an independent source
    • G09G3/18—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of a single character by selection from a plurality of characters, or by composing the character by combination of individual elements, e.g. segments using a combination of such display devices for composing words, rows or the like, in a frame with fixed character positions by control of light from an independent source using liquid crystals
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
    • G09G3/3611—Control of matrices with row and column drivers
    • G09G3/3622—Control of matrices with row and column drivers using a passive matrix
    • G09G3/3629—Control of matrices with row and column drivers using a passive matrix using liquid crystals having memory effects, e.g. ferroelectric liquid crystals
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2300/00—Aspects of the constitution of display devices
    • G09G2300/04—Structural and physical details of display devices
    • G09G2300/0469—Details of the physics of pixel operation
    • G09G2300/0478—Details of the physics of pixel operation related to liquid crystal pixels
    • G09G2300/0482—Use of memory effects in nematic liquid crystals
    • G09G2300/0486—Cholesteric liquid crystals, including chiral-nematic liquid crystals, with transitions between focal conic, planar, and homeotropic states
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/04—Maintaining the quality of display appearance
    • G09G2320/041—Temperature compensation

Abstract

An information module system (40, fig 2) for use in a vehicle with an electrically powered brake control unit 30, which brake control units has a date store to retain operational date and is connected to the information module via a data link. The information module is provided with a bistable display which is adapted to display operational data even when the vehicle is stationary and powered down. This is particularly applicable in the case of freight wagons which have no independent power source. The bi-stable display may be a cholesteric LCD (Ch-LCD) display; the data may be in the form of a barcode. The system may have a temperature sensor and may modify the data sent when the temperature is below a predetermined temperature. A display screen may have a UV filter, be scratch resistant and have an internal dessicant to prevent condensation.

Description

Information Module The invenflon relates to an information module for a raflway vehicle, in particular, but not exclusively, for freight wagons.
Railway vehicle brake systems have become increasingly sophisticated in recent years as the demands of operators have increased. Modern brake systems wifl often include some form of data logging and have the facility for interrogation for the brake control unit so that usage information and fault diagnostics can be carried out on the vehicle. An example of this is the Applicants EF2002 Brakes Consultant software, which is installed on a laptop computer which is provided with a bespoke adapter, which can then be plugged into the brake control unit to extract the data from the brake control unit and to determine if there are any faults on the unit, Simpler systems are known from the field of trailer brakes such as the Knorr-Bremse Trailer Information Module (TIM), which comprises a simple trailer mounted device that extracts the necessary data from the trailer electronic brake control unit during use and is provided with a small display. The TIM takes its power from the ISO 7638 permanent power source for the trailer electronic brake control unit or alternatively can be connected to a laptop computer using a specific adapter.
The known solutions all require either a laptop computer or some alternative power source to power the information module. This is a particular problem for freight wagon operators as freight wagons are usually parked in sidings without a locomotive or any other source of power available. Freight wagons are also frequently used in conditions where it would not be possible or advisable to use a laptop computer as the wagons are stored outside and frequently in wet or dusty environments.
The present invention therefore seeks to provide an information module for a railway vehicle that is useable in a wide range of environments.
According to the invention there is provided a brake system for a vehicle with an electrically powered brake control unit, which brake control unit has a data store to retain operational data, the system being provided with an information module adapted to communicate with the data store via a datalink, which information module is provided with a bistable display such that when the vehicle is stationary and powered down, the display is adapted to display operational data.
Preferably, the bistable display is a cholesteric LCD display. Preferably, the brake control unit is adapted to provide operational data in the form of a barcode. The barcode display is particularly advantageous as the barcode can be read using widely used hand held devices such as smartphones and so it is no longer necessary to connect a laptop to the control unit to read the data.
The system of the invention advantageously permits the operational data arising out of the use of the system such as distance travelled or number and timings of number of valve operations to be displayed in a readable format when the vehicle such as a freight wagon or commercial vehide trailer is powered down.
An exemplary embodiment of the invention will now be described in greater detail with reference to the drawings in which: Fig. 1 shows schematically a freight train braking system Fig. 2 shows an information module for the train Figure 1 shows schematically a freight train brake system comprising a main brake pipe I which is in fluid communication with a brake distributor 2, which brake distributor 2 is fluidly connected via a conduit 12 to relay valves 3,4, each of which relay valves 3,4 are connected to a respective dump valve 5,6, which dump valves 5,6 are connected to a respective brake cylinder (not known). The brake distributor 2 has a dummy cylinder pressure and will typically have integral relay valve capability.
There will generally be one relay and one dump valve per bogie, or one dump valve per axle. It is also known to use variable load valves in place of the relay valves 3,4.
An auxiliary reservoir 7 is provided which stands in fluid communication via a first outlet port with the brake distributor 2 and also in fluid communication via a second outlet port with each of the relay valves 3,4. The auxiliary reservoir pressure is protected by a check valve in the distributor 2. The solid lines show the arrangement in use on a single pipe system. Shown in dashed lines is a further conduit 9 connected to the auxiliary reservoir 7 at the second outlet port, having an isolating cock and check valve 10, which leads to a main reservoir pipe 11. The conduit 9, check valve 10 and main reservoir 11 would be present in a twin pipe system. In use, the auxUiary reservoir 7 stores the energy, in the form of compressed air, used to apply the brakes. The auxiliary reservoir 7 is charged using the air supply in the brake pipe 1.
A wheel slide protection (WSP) or supplementary reservoir 20 is optionally provided which is connected via a conduit 21 to a first port 23 of an air supply or selector valve 22. The supplementary reservoir effectively increases the capacity of the auxiliary reservoir to provide sufficient air capacity for wheel slide protection. The selector valve also stands in fluid communication via a second port 24 with the conduit 9 and the second outlet of the auxiliary reservoir 7. A third port 25 of the selector valve 22 is in fluid communication with the relay valves 3,4 and a fourth port 26 of the selector valve 22 is in fluid communication with the conduit 12 between the brake distributor 2 and the relay valves 3,4. The selector valve 22 is electronically controlled by a WSP brake control unit 30. The WSP reservoir 20 is provided with an emergency exhaust valve 27. The valve 22 manages the air supply in the brake system by providing a priority air supply into the reservoir capacity until the brakes are in a state of near release, at which point the train can pull away within an acceptable period of time.
Once the auxiliary reservoir 7 has been charged to the required level, the valve 22 changes state and directs air to the supplementary reservoir 20.
Pressure in the dummy cylinder or brake cylinder lines can be used as a signal for the changeover of air supply recharge from one reservoir to another. The valve 22 further comprises an integral check valve to prevent loss of air from the auxiliary reservoir to the supplementary reservoir 20. The valve 22 can be operated either pneumatically or electrically.
If the auxiliary reservoir pressure is seen to drop to the minimum safety requirement threshold level, during WSP activity, the WSP function will be disabled in both dump valves. This state will remain until the AR and SR pressures have been reinstated to a pre-determined level capable of supporting WSP activity.
In the event that the embodiment is used with a twin pipe system, a further conduit 28 with an isolating cock and check valve 29 enables fluid communication between the main reservoir pipe 11 and the conduit 21 between the WSP reservoir 20 and the selector valve 22. In the two pipe arrangement the first pipe transmits the brake demand and the second optional pipe delivers the air supply.
The brake control unit 30 can be powered by a battery, axle end generator or an air electric motor. Freight wagons are not generally supplied with electrical power from the locomotive and when the freight wagon is stationary will generally be unpowered as the industry does not like batteries due to reliability problems and maintenance costs. The brake control unit will store data about the usage of the brake system such as the number of valve operations, details of any WSP activity and any faults detected. It can also be programmed with other information such as date of manufacture and servicing data.
Figure 2 shows an information module 40 for the brake control unit 30. The information module is connected to the brake control unit by way of a data link and comprises a bistable LCD display. In use, when it is powered, the brake control unit will output the data to the bistable LCD display. Depending on the particular configuration desired by the operator, the display could simply display a warning that a service is due or overdue or if there is a fault. It would also be possible to display the complete operating data in the form of a linear or 2D barcode. Due to the bistable nature of the display, when power is removed from the display when the freight wagon is stationary, the display will retain the last data on its display. An operator can then either see that there is a fault, for example, or could use a small hand held device to read the display. This device could be a hand held bar code reader or a smart phone with an appropriate programme installed. Suitable bistable displays include cholesteric LCDs.
The system further comprises a temperature sensor that can be incorporated into the brake control unit microprocessor. It has been found that bistable displays, in particular cholesteric LCDs are not stable under certain temperature conditions and that the display can fade at low temperatures, especially below 0°C.
If the microprocessor detects that the ambient temperature has dropped below a certain predetermined temperature, typically 5°C or less, the microprocessor invokes a new routine to modify the instructions sent to the bistable display. These will include longer write signals. In this manner, it is possible to use the information module in winter conditions. Preferably, the screen is provided with a screen coating that provides a UV filter and scratch protection. An internal dessicant can also be provided to prevent condensation on the screen.
S
As the flftcrtp1:Oces.$or also receives signals trcm:cther sensors on the train: such as wheel speed and comrnu.njca.tkn on the train bus, the microprocessor corfl also :display this data In a further refinement, the information module can include a Wifi card such as those used under the IEEE 8002A1 standards. This would permit the information modules on adjacent wagons to communicate with one another, in use, and also with the locomotive ddver. It would also then be possible to collect the data from trains as they went past a certain point on the network adapted to download the data. This would be useful in tracking any damage that may be caused to tracks by wheel flats.
The information module would also be suitable for use in other unpowered brake control units such as on commercial vehicle trailers.

Claims (8)

  1. Cairns 1. A system for use in a vehicle with an electricafly powered brake control unit1 which brake control unit has a data store to retain operational data, the system being provided with an information module adapted to communicate with the data store via a datalink, which information module is provided with a bistable display such that when the vehicle is stationary and powered down, the display is adapted to display operational data.
  2. 2. A system according to Claim 1, wherein the bistable display is a choestehc LCD display.
  3. 3. A system according to Claim I or Claim 2, wherein, the brake control unit is adapted to provide operational data in the form of a barcode.
  4. 4. A system according to any one of Claims I to 3, wherein the system further comprises a temperature sensor, wherein in the event that the ambient temperature is determined to be below a predetermined temperature, the data store is adapted to modify the data sent to the information module.
  5. 5. A system according to Claim 4, wherein the data store sends longer write signals if the ambient temperature is determined to be below the predetermined temperature.
  6. 6. A system according to any one of Claims I to 5, wherein the information module is adapted to communicate with components or modules located on adjacent carriages or wagons of a railway vehicle.
  7. 7. A system according to any one of Claims I to 6, wherein the screen is provided with a screen coating that provides a UV filter and scratch protection and an internal dessicant is provided to prevent condensation on the screen.
  8. 8. A system substantially as described herein with reference to and as illustrated in the accompanying drawings.
GB1210554.0A 2011-06-14 2012-06-14 A Brake System for a Vehicle with an Electrically Powered Brake Control Unit Active GB2491972B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GBGB1110020.3A GB201110020D0 (en) 2011-06-14 2011-06-14 Information module

Publications (3)

Publication Number Publication Date
GB201210554D0 GB201210554D0 (en) 2012-07-25
GB2491972A true GB2491972A (en) 2012-12-19
GB2491972B GB2491972B (en) 2018-05-09

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GBGB1110020.3A Ceased GB201110020D0 (en) 2011-06-14 2011-06-14 Information module
GB1210554.0A Active GB2491972B (en) 2011-06-14 2012-06-14 A Brake System for a Vehicle with an Electrically Powered Brake Control Unit

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GBGB1110020.3A Ceased GB201110020D0 (en) 2011-06-14 2011-06-14 Information module

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5751257A (en) * 1995-04-28 1998-05-12 Teletransactions, Inc. Programmable shelf tag and method for changing and updating shelf tag information
US6272407B1 (en) * 1994-05-06 2001-08-07 Robert Bosch Gmbh Vehicle equipped with a control system
WO2010095686A1 (en) * 2009-02-19 2010-08-26 セイコーインスツル株式会社 Method for driving dot-matrix display using bistable nematic liquid crystal

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6424391U (en) * 1987-08-03 1989-02-09
GB2288671B (en) * 1994-04-22 1998-04-01 Delco Electronic Overseas Corp Liquid crystal display circuit and regulated power supply therefor
JP2002258240A (en) * 2001-03-06 2002-09-11 Honda Motor Co Ltd Liquid crystal display for vehicles
US20030156090A1 (en) * 2002-02-20 2003-08-21 Munn Jason Drury Bistable liquid crystal display having a remote display update control
JP2004219933A (en) * 2003-01-17 2004-08-05 Seiko Epson Corp Electro-optical panel, method for driving electro-optical panel, electro-optical device and electronic apparatus
TWI275067B (en) * 2005-06-08 2007-03-01 Ind Tech Res Inst Bistable chiral nematic liquid crystal display and driving method for the same
TWI384442B (en) * 2007-10-12 2013-02-01 Ind Tech Res Inst Driving circuit capable of simultaneously driving three-color bistable liquid crystals
TWI364016B (en) * 2008-11-05 2012-05-11 Ind Tech Res Inst Bi-stable display systems and driving methods thereof

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6272407B1 (en) * 1994-05-06 2001-08-07 Robert Bosch Gmbh Vehicle equipped with a control system
US5751257A (en) * 1995-04-28 1998-05-12 Teletransactions, Inc. Programmable shelf tag and method for changing and updating shelf tag information
WO2010095686A1 (en) * 2009-02-19 2010-08-26 セイコーインスツル株式会社 Method for driving dot-matrix display using bistable nematic liquid crystal

Also Published As

Publication number Publication date
GB201210554D0 (en) 2012-07-25
GB2491972B (en) 2018-05-09
GB201110020D0 (en) 2011-07-27

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