专利汇可以提供Track Barcode Systems for Railroad Management专利检索,专利查询,专利分析的服务。并且This invention is related to an economic and practical method of using barcode systems for the management of railroad tracks. The systems consist of barcodes and device(s) which can optically read and decode the barcodes. The barcodes are permanently installed on one or both rails of a railroad track at predetermined locations along the track. The barcodes include coded contents such as track location coordinates and other railroad property information along the track. By using these novel track barcode systems, sections of problematic tracks could be accurately located either manually or automatically for repeatable monitoring, repairing or replacement purposes.,下面是Track Barcode Systems for Railroad Management专利的具体信息内容。
What is claimed is:
Application No. 61/836,522
Filing or 371(c) Date: Jun. 18, 2013
Confirmation No.: 5777
This invention relates to the utilization of track barcode systems to provide marking and identification for each and every section of a railroad track. The barcodes consisting of each and every unique barcode provide accurate and fixed reference points or coordinates of the track for monitoring, repairing and replacement of railroad track sections. Other railroad properties such as rail types, railroad ties and etc. could also be coded into the barcodes for associated railroad management purposes.
Railroad tracks are consistently monitored by using sensors based on optical, capacitive, eddy current measurements and other mechanisms throughout their lifespan of service. The track gauge between the two paralleled rails and individual rail profile are examples of the parameters that need to be measured and monitored closely for the safety of train operation. Based on modern sensor and automation technologies, the track gauge and rail profile can be measured automatically and accurately at any specific point of the track. In order to calculate rail profile wear or track gauge variation over time, however, it is critical to have accurate and fixed track location identifications for each and every measurement made. Without accurate location repeatability, individual track gauge and rail profile measurements are not very useful no matter how accurate they are.
One of the track section identification methods is to use the existing global positioning system (GPS). However, the current GPS system can only provide location accuracy up to a few meters, which is not accurate enough for the purpose of monitoring track wear. Besides, geographical environment around the monitored tracks, such as underground tunnels, surrounding mountains and nearby tracks, may affect the performance or accuracy of the GPS system as well. In order to calculate the amount of track wear between two measurements taken at two different times, for example, it is necessary to overlap the two rail profiles using a common track location coordinate. Without accurate location identifications, it is impossible to calculate the track wear accurately, even though both individual rail profiles are accurate themselves.
Another track positioning method is to use the existing posts or marks that are located beside and along the railroad tracks. However, it is a very challenging task for a measuring vehicle to detect those posts or marks automatically, since those posts or marks share no standard relative position against the tracks or standard appearance. Manual identification of those reference posts was occasionally adopted, and the location triggers were inputted to a measurement system manually. However, the accuracy and repeatability of manual triggers were not satisfactory due to inevitable human error in this manual operation.
Yet another track positioning method is to use RFID (radio frequency identification) chips and a corresponding chip detector. Since RFID technology is based on radio frequency technology and radio signal could be detected from all directions, the corresponding positioning accuracy is a distance of plus or minus a few feet. Another disadvantage of RFID technology is the high costs associated with a vast amount of RFID chips that should be positioned along the track with a predetermined spacing.
The method of the present invention is to use a track barcode system including an array of pre-coded barcodes and one or more scanners to provide accurate, repeatable and unique track location identifications that could be used by any railroad track management systems. Barcode technologies have been established and are widely used in daily life applications such as library computers, supermarket check-outs and on automated production lines. Outdoor weather-proof barcode sticks were used on the vehicle identification plates which could stay as long as the life of the vehicle. One dimensional and two dimensional barcodes are available. Those barcodes are much more affordable than RFID chips. The corresponding high speed barcode scanners which are capable to carry out thousands of scans per second are also readily available. The trigger signals and the readings generated by the barcode scanners could be transmitted into any existing track measurement systems. Those triggers and location identifications are the important data that could provide the common yet repeatable track coordinates to synchronize different track measurement systems based on a single moving vehicle or different vehicles.
Depending on the size and the orientation of the barcodes, the scan rate of the scanner and the speed of the moving vehicle carrying the scanner, the position accuracy resulted from the method of the present invention could be in a range of a few centimeters or even better. Although this barcode application for railroad track management systems is novel, the barcode technology adopted in the method of the present invention is a solid and proved one. The implementation of a track barcode system for railroad management systems, such as the existing track gauge and rail profiling measurement systems, is economic yet practical.
In accordance with the present invention, a track barcode system is provided for railroad management purposes. The track barcode system includes a plurality of barcodes for coding contents such as track location coordinates and other railroad property information; a plurality of labels carrying the plurality of barcodes on a one-for-one basis, wherein the plurality of labels are attached firmly to a rail of a railroad track at predetermined locations along the railroad track to mark the track location coordinates and other railroad property information; and one or more barcode scanners capable of reading and decoding the plurality of barcodes optically, for providing the contents of the plurality of barcodes.
According to another aspect of the present invention, a track barcode system is provided for railroad management purposes. The track barcode system includes a plurality of barcodes attached firmly to a rail of a railroad track at predetermined locations along the railroad track, for coding contents such as track location coordinates and other railroad property information; and one or more barcode scanners capable of reading and decoding the plurality of barcodes optically, for providing the contents of the plurality of barcodes.
According to yet another aspect of the present invention, a track barcode system is provided for railroad management purposes. The track barcode system includes a plurality of barcode labels attached firmly to a first position and a second position of one or both rails of a railroad track at predetermined locations along the railroad track, for coding contents such as track location coordinates and other railroad property information; a first barcode scanner capable of reading and decoding the plurality of barcodes attached to the first position optically, for providing the contents of the plurality of barcodes attached to the first position; and a second barcode scanner capable of reading and decoding the plurality of barcodes attached to the second position optically, for providing the contents of the plurality of barcodes attached to the second position, wherein the second barcode scanner and the first barcode scanner could be one single barcode scanner; wherein the track barcode system uses the contents of the plurality of barcode labels attached to the first position and the second position to cross-reference each other for increasing system accuracy and (or) diagnosing damaged barcode labels.
Based on different applications, various types of information related to the railroad track management could be coded in the barcode 4 shown in
In the most simplified configuration of the barcode system 100, only a pair of barcodes and scanner combination is necessary. The combination could consist of an array of barcode labels 4 installed at location A of the rail along the track and a single barcode scanner 28 installed between the two rails as shown in
With the vehicle 22 moving on the track, the scanner 28 scans continuously. If a barcode is detected, the scanner 28 can de-code the barcode which carries the coordinate information and other track or rail properties of the specific position where the barcode is installed. The scanner 28 can send the coordinate information associated with the specific barcode 4 and a trigger signal to any track management systems (not shown) mounted on the vehicle 22. Those track management systems include measurement system, grinding system, tamping system and etc. With the coordinate information supplied by the track barcode system 100 of the present invention, other track management systems can have accurate and repeatable track coordinates that are very important for track monitoring and other track management purposes.
In a more complex configuration of the track barcode system 100, two or more pairs of barcodes and scanner combination could be adopted.
Comparing to the barcode location of the track barcode system 100, the barcode location of the track barcode system 200 of the present invention has an advantage of easier access. It will be relatively easier to design an automated barcode installation machine if location C of the rail 10 is selected as the location for the barcode installation. It will also be easier for maintenance workers to use handheld smart phone or scanner to read the label and identify the specific tie that is monitored and needs to be replaced. The associated disadvantage is that the barcode 4 may be too close to the head of the rail 10, especially in the case of track grinding operation.
The advantage of the barcode location related to the track barcode system 300 is that the scanning light beam 30 from the scanner 28 is almost perpendicular to the barcode 4, which may make the scanning process easier or quicker. However, the disadvantage associated with the barcode location of the track barcode system 300 is that the barcode maybe easily covered by dusts and/or stone track ballasts around the barcode labels.
The advantage of using barcode assembly 4 in the track barcode system 400 of the present invention is to provide an extra layer of protection for the barcode label 41 from dusts, rains, sparks of a grinding machine and etc. The disadvantage of the barcode system 400 is the added costs associated with barcode assembly 4, air nozzle 46 and the required air compressor (not shown).
The track barcode system 710 of the present invention has advantages of being repeatable, accurate, practical and affordable. The trigger signal and track coordinates provided by the track barcode system 710 of the present invention can be used by other track management systems 750 such as track gauge measurement system, rail profile measurement system, grinding machine, tamping machine or other systems which need repeatable and accurate track coordinates.
As those of ordinary skill in the art can appreciate, the track barcode systems of the present invention can have other applications where the need exists for a repeatable and accurate track coordinates. It is to be understood that the description of the embodiment(s) in this application is (are) intended to be only illustrative, rather than restrictive, of the present invention. Those of ordinary skill will be able to make certain additions, deletions, and/or modifications to the embodiment(s) of the disclosed subject matter without departing from the spirit of the invention or its scope, as defined by the appended claims.
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