US5986547A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus and method for improving the safety of railroad systems
Assignee: Individual
•
Filing: 1997-03-03
•
Granted: 1999-11-16
•
Expires: 2017-03-03
Abstract
Abstract An apparatus and method for improving the safety of railroad systems of the present invention includes a system for navigating a railroad vehicle over railroad tracks. An attitude sensor is used to dynamically sense the attitude of the railroad vehicle as it travels over a set of railroad tracks. By sensing the attitude of the railroad vehicle, a determination of the condition of the railroad tracks can be made. The apparatus also sensed the position of the railroad vehicle in real time to correlate the sensed attitude with a precise position along the railroad tracks. The navigation system is capable of determining a highly accurate position of the vehicle in real time. The position of the vehicle is also used to navigate the railroad vehicle.
Inventors
- 👤 Kelvin Korver
- 👤 Wesley Hawkinson
- 👤 Donovan Boedigheimer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:21
CPC Classifications
G; G01; G01S; G01S5/00; G01S5/02; G01S5/0247
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
185 words
A method of determining the location of hazardous spots on the railroad track comprising the steps of: providing an inertial navigation system including an attitude sensor on the rail car for sensing the position and attitude of the rail car; providing a radio navigation system on the rail car; moving the rail car over a length of railroad tracks; sensing the position of the rail car with the inertial navigation system at a plurality of positions on the railroad tracks as the rail car moves over the length of the railroad tracks; determining an external position reference using data from the radio navigation system; correcting any error in the sensed position of the rail car using the determined external position reference; sensing the attitude of the rail car at the plurality of positions; storing a sensed attitude and sensed position at the plurality of positions; comparing the sensed attitude at the plurality of positions with reference attitudes at the plurality of positions; and determining the location of hazardous spots on the railroad track based on the comparison of the sensed attitudes with the referenced attitudes.
Claim 2
Independent Claim
185 words
A method of determining the location of hazardous spots on the railroad track comprising the steps of: providing an inertial navigation system including an attitude sensor on the rail car for sensing the position and attitude of the rail car; providing a radio navigation system on the rail car; moving the rail car over a length of railroad tracks; sensing the position of the rail car with the inertial navigation system at a plurality of positions on the railroad tracks as the rail car moves over the length of the railroad tracks; determining an external position reference using data from the radio navigation system; correcting any error in the sensed position of the rail car using the determined external position reference; sensing the attitude of the rail car at the plurality of positions; storing a sensed attitude and sensed position at the plurality of positions; comparing the sensed attitude at the plurality of positions with reference attitudes at the plurality of positions; and determining the location of hazardous spots on the railroad track based on the comparison of the sensed attitudes with the referenced attitudes.
Claim 3
Dependent Claim
12 words
The method of claim 1 wherein the reference attitudes are desired attitudes.
Claim 4
Dependent Claim
13 words
The method of claim 1 wherein the reference attitudes are previously sensed attitudes.
Claim 5
Dependent Claim
15 words
The method of claim 1 wherein the reference attitudes are averages of previously sensed attitudes.
Claim 6
Dependent Claim
49 words
The method of claim 1 further comprising the steps of: sensing the angular changes of the rail car using an inertial system; and wherein said step of sensing the attitude of the rail car is performed by determining the attitude of the vehicle using data from the inertial system.
Claim 7
Dependent Claim
17 words
The method of claim 5 further comprising the step of sensing the speed of the rail car.
Claim 8
Dependent Claim
31 words
The method of claim 6 further comprising the steps of: providing an accelerometer; and correcting the sensed attitude of the rail car using data from the accelerometer and the sensed speed.
Claim 9
Independent Claim
158 words
A method of surveying railroad tracks comprising the steps of: providing a rail vehicle; providing an inertial navigation system on the rail vehicle for sensing the position of the vehicle; providing a radio navigation system on a rail vehicle; determining an external position reference using data from the radio navigation system; moving the rail vehicle over the railroad tracks to be surveyed; sensing the attitude of the rail vehicle at a plurality of locations along the railroad tracks as the rail vehicle moves over the railroad tracks; sensing the position of the rail car with the inertial navigation system vehicle as the rail vehicle moves over the railroad tracks; correcting any error in the sensed position of the rail car using the determined external position reference; correlating the sensed attitudes at the plurality of positions along the railroad tracks with the sensed position at each of the plurality of locations; and storing the correlated information in memory device.
Claim 10
Independent Claim
158 words
A method of surveying railroad tracks comprising the steps of: providing a rail vehicle; providing an inertial navigation system on the rail vehicle for sensing the position of the vehicle; providing a radio navigation system on a rail vehicle; determining an external position reference using data from the radio navigation system; moving the rail vehicle over the railroad tracks to be surveyed; sensing the attitude of the rail vehicle at a plurality of locations along the railroad tracks as the rail vehicle moves over the railroad tracks; sensing the position of the rail car with the inertial navigation system vehicle as the rail vehicle moves over the railroad tracks; correcting any error in the sensed position of the rail car using the determined external position reference; correlating the sensed attitudes at the plurality of positions along the railroad tracks with the sensed position at each of the plurality of locations; and storing the correlated information in memory device.
Claim 11
Dependent Claim
17 words
The method of claim 8 further comprising the step of comparing the correlated information with reference information.
Claim 12
Dependent Claim
29 words
The method of claim 9 further comprising the step of determining the condition of the railroad tracks based on the comparison of the correlated information with the reference information.
Claim 13
Dependent Claim
15 words
The method of claim 9 wherein the reference information is based on previously correlated information.
Claim 14
Dependent Claim
15 words
The method of claim 9 wherein the reference information is based on desired attitude information.
Claim 15
Dependent Claim
15 words
The method of claim 8 wherein the attitude and position are sensed in real time.
Claim 16
Independent Claim
87 words
A method of improving the safety of railroad systems comprising the steps of: providing a rail vehicle placed on a set of railroad tracks; providing an inertial navigation system on the rail vehicle for determining a first position; providing a radio navigation system on the rail vehicle to correct errors in determining the first position; determining the attitude of the rail vehicle at the first position on the railroad tracks; and determining the condition of the railroad tracks at the first position based on the determined attitude.
Claim 17
Independent Claim
87 words
A method of improving the safety of railroad systems comprising the steps of: providing a rail vehicle placed on a set of railroad tracks; providing an inertial navigation system on the rail vehicle for determining a first position; providing a radio navigation system on the rail vehicle to correct errors in determining the first position; determining the attitude of the rail vehicle at the first position on the railroad tracks; and determining the condition of the railroad tracks at the first position based on the determined attitude.
Claim 18
Dependent Claim
27 words
The method of claim 14 further comprising the step of repairing the railroad tracks at the first position if the determined condition indicates that repair is desirable.
Claim 19
Dependent Claim
27 words
The method of claim 14 further comprising the step of replacing the railroad tracks at the first position if the determined condition indicates that replacement is desirable.
Claim 20
Dependent Claim
55 words
The method of claim 14 further comprising the steps of: determining the attitude of the rail vehicle at a plurality of positions on the railroad tracks; and determining the condition of the railroad tracks at each of the plurality of positions based on the determined attitude of the rail vehicle at the plurality of position.
Claim 21
Dependent Claim
36 words
The method of claim 17 further comprising the step of selectively repairing the railroad tracks at the plurality of positions if the determined condition at each of the plurality of positions indicates that repair is desirable.
Claim 22
Dependent Claim
40 words
The method of claim 17 further comprising the steps of: sensing the position of the rail vehicle at the plurality of positions; and storing information based on the sensed attitude and sensed position for each of the plurality of positions.
Claim 23
Dependent Claim
42 words
The method of claim 19 further comprising the steps of: determining the attitude and sensing the position of the rail vehicle at the plurality of positions again; and comparing the newly determined attitude at the plurality of positions with the stored information.
Claim 24
Dependent Claim
147 words
A navigation system for a railroad vehicle comprising: a position change sensor for sensing the speed of the railroad vehicle; a set of gyros for sensing the attitude and heading of the railroad vehicle; a set of angular change sensors for sensing the pitch and roll of the railroad vehicle; a radio navigation system for sensing an external reference position, said radio navigation system including an antenna coupled to said railroad vehicle; a processor connected to each of said sensors and radio navigation system, said processor performing the processing steps of: correcting the sensed attitude of the railroad vehicle using the sensed pitch and roll of the railroad vehicle; determining the velocity of the railroad vehicle using the sensed speed, heading and attitude of the railroad vehicle, determining a first position by integrating the determined velocity, and correcting the determined first position using the external reference position.
Claim 25
Dependent Claim
147 words
A navigation system for a railroad vehicle comprising: a position change sensor for sensing the speed of the railroad vehicle; a set of gyros for sensing the attitude and heading of the railroad vehicle; a set of angular change sensors for sensing the pitch and roll of the railroad vehicle; a radio navigation system for sensing an external reference position, said radio navigation system including an antenna coupled to said railroad vehicle; a processor connected to each of said sensors and radio navigation system, said processor performing the processing steps of: correcting the sensed attitude of the railroad vehicle using the sensed pitch and roll of the railroad vehicle; determining the velocity of the railroad vehicle using the sensed speed, heading and attitude of the railroad vehicle, determining a first position by integrating the determined velocity, and correcting the determined first position using the external reference position.
Claim 26
Dependent Claim
85 words
The navigation system of claim 21 wherein said antenna is coupled to said railroad vehicle at a known location relative to the railroad vehicle and wherein said processor further performs the processing steps of: determining the position of the antenna based on the attitude of the railroad vehicle and the known location of the antenna relative to the railroad vehicle, correcting the external reference position based on the determined position of the antenna, and correcting the determined first position using the corrected external reference position.
Claim 27
Dependent Claim
24 words
The navigation system of claim 21 further comprising an output port connected to said processor for providing data to a railroad vehicle guidance system.
Claim 28
Dependent Claim
19 words
The navigation system of claim 21 further comprising a user perceivable display connected to said processor for displaying information.
References Cited (Backward Citations)
US5194871A
Cited
US4667203A
Cited
US5014066B1
Cited
US5384574A
Cited
US4860018A
Cited
US5014066A
Cited
US5150712A
Cited
US5143073A
Cited
US4796191A
Cited
US4599620A
Cited
US4674327A
Cited
US4878170A
Cited
US4949268A
Cited
US5043902A
Cited
US5132695A
Cited
US5075693A
Cited
SU1693602A1
Cited
SU1624449A1
Cited
US5274329A
Cited
US5299130A
Cited
JPH034704A
Cited
SU1661826A1
Cited
US5166688A
Cited
EP0406877A2
Cited
US5177489A
Cited
WO1991009375A1
Cited
US5382957A
Cited
US5375059A
Cited
US5390125A
Cited
US5438517A
Cited
US5214757A
Cited
US5093839A
Cited
US5344144A
Cited
US5325302A
Cited
US5155490A
Cited
JPH04164277A
Cited
FR2669118A1
Cited
US5030957A
Cited
US5202829A
Cited
US5523951A
Cited
US5347286A
Cited
US5323322A
Cited
US5291412A
Cited
EP0716315A1
Cited
US5386727A
Cited
EP0574009A2
Cited
US5220876A
Cited
WO1994002086A1
Cited
US5442558A
Cited
WO1994009536A1
Cited
EP0595685A1
Cited
US5296861A
Cited
US5430654A
Cited
US5390124A
Cited
US5332180A
Cited
GB2274170A
Cited
JPH06225231A
Cited
DE4304561A1
Cited
US5379320A
Cited
FR2703200A1
Cited
US5606506A
Cited
US5420593A
Cited
US5392052A
Cited
FR2708117A1
Cited
US5534875A
Cited
DE4342171A1
Cited
US5517419A
Cited
US5438337A
Cited
US5422814A
Cited
WO1995018432A1
Cited
DE19504475A1
Cited
US5433111A
Cited
US5617317A
Cited
US5592382A
Cited
EP0736441A1
Cited
US5657025A
Cited
DE19604812C1
Cited
US5623244A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2002-11-15 | 2003-05-17 | 2003-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-11-15 | 2007-05-17 | 2007-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-11-15 | 2011-05-17 | 2011-11-16 | $7700.00 | Window Closed / Lapsed |