Method and apparatus for gauging the corsslevel and warp of railroad tracks
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
E01B-035/02
G01C-009/00
출원번호
US-0477468
(1990-02-09)
발명자
/ 주소
Kesler, John K.
Jordan, William L.
출원인 / 주소
Ensco, Inc.
대리인 / 주소
Sixbey, Friedman, Leedom & Ferguson
인용정보
피인용 횟수 :
15인용 특허 :
3
초록▼
The crosslevel measuring adapter includes a battery-powered electronic level sensor, a processor unit, a display, and data, display and power switches mounted in a housing through which an inclination measuring bar passes. The adapter unit may be mounted anywhere intermediate the ends of the bar whi
The crosslevel measuring adapter includes a battery-powered electronic level sensor, a processor unit, a display, and data, display and power switches mounted in a housing through which an inclination measuring bar passes. The adapter unit may be mounted anywhere intermediate the ends of the bar which engage spaced railroad tracks during a measurement cycle. When the power switch is activated, the adapter initiates a zero mode to determine an automatic zero offset value to be automatically applied to subsequent crosslevel measurement values. The adapter calculates warp and crosslevel index values from a plurality of crosslevel measurements, and if the warp or crosslevel index values exceed respective threshold levels, automatic display of the value is initiated. Otherwise, measured crosslevel values are automatically displayed and calculated values are displayed by activation of the display switch.
대표청구항▼
1. A method for gauging the crosslevel and warp of a pair of railroad track by measuring the inclination between adjacent points on the surfaces of the two rails as a crosslevel measurement which includes taking a plurality of successive crosslevel measurements across said track at spaced points alo
1. A method for gauging the crosslevel and warp of a pair of railroad track by measuring the inclination between adjacent points on the surfaces of the two rails as a crosslevel measurement which includes taking a plurality of successive crosslevel measurements across said track at spaced points along the length of said tracks to obtain a first number of crosslevel measurement values, comparing said first number of crosslevel measurement values to obtain a warp value which is a function of the maximum differential between the crosslevel values in said first number of crosslevel values and comparing the warp value to a predetermined allowable warp reference value to determine which is greater. 2. The method of claim 1, wherein said first number of crosslevel measurement values are obtained by taking four successive crosslevel measurements. 3. The method of claim 1, which includes providing an indication when said warp value exceeds said predetermined allowable warp reference value. 4. The method of claim 1 which includes obtaining a zero reference value before taking said plurality of successive crosslevel measurements by taking at least a first crosslevel measurement across said tracks in a first direction, subsequently taking at least a second crosslevel measurement across said tracks in the same place where said first crosslevel measurement was taken but in a second direction which is opposite to said first direction, obtaining a difference value from said first and second crosslevel measurements, and applying said difference value as a zero offset reference to subsequently obtained crosslevel measurement values. 5. The method of claim 1 which includes continuing to take a plurality of crosslevel measurements after said first number of crosslevel values is obtained until a second number of crosslevel values has been obtained which includes and is greater than said first number of crosslevel values, obtaining an absolute difference value between each successive crosslevel value in said second number of crosslevel values, summing said absolute difference values to obtain a total difference value indicative of the crosslevel index and comparing said crosslevel index to a second predetermined allowable cross level reference value to determine which is greater. 6. The method of claim 5 which includes providing an indication when said crosslevel index exceeds said second predetermined allowable crosslevel reference value. 7. The method of claim 5, wherein said second number of crosslevel measurement values is obtained by taking a total of twelve successive crosslevel measurements. 8. The method of claim 5 which includes obtaining a zero reference value before taking said plurality of successive crosslevel measurements by taking at least a first crosslevel measurement across said track in a first direction, subsequently taking at least a second crosslevel measurement across said track in the same place where said first crosslevel measurement was taken but in a second direction which is opposite to said first direction, obtaining a difference value from said first and second crosslevel measurements, and applying said difference value as a zero offset reference to subsequently obtained crosslevel measurement values. 9. A method for gauging the crosslevel index of a railroad track by measuring the inclination between adjacent points on the surfaces of the two rails as a crosslevel measurement which includes taking a plurality of successive crosslevel measurements across said rails at spaced points along the length of said track to obtain a first number of crosslevel measurement values, obtaining an absolute difference value between successive crosslevel measurement values, and summing said absolute difference values to obtain a total difference value indicative of the crosslevel index. 10. The method of claim 9 which includes obtaining a zero reference value before taking said plurality of successive crosslevel measurements by taking at least a first crosslevel measurement across said tracks in a first direction, subsequently taking at least a second crosslevel measurement across said tracks in the same place where said first crosslevel measurement was taken but in a second direction which is opposite to said first direction, obtaining a difference value from said first and second crosslevel measurements, and applying said difference value as a zero offset reference to subsequently obtained crosslevel measurement values. 11. The method of claim 10, wherein said first number of crosslevel measurement values is obtained by taking twelve successive crosslevel measurements. 12. The method of claim 9 which includes comparing said total difference value to a second reference value to determine which is greater. 13. The method of claim 12 which includes providing an indication when said total difference value exceeds said second predetermined reference value. 14. A crosslevel measuring adapter for attachment to an inclination measuring bar to gauge the crosslevel, warp and crosslevel index of a railroad track by measuring the inclination between adjacent points on the surfaces of the two rails as a crosslevel measurement comprising a housing, an inclination sensing means mounted within said housing, said inclination sensing means operating to provide a measurement signal having a value indicative of the amplitude of inclination sensed by said inclination sensing means, processing means connected to receive said measurement signal and indicator means connected to said processing means and operative to display values in response to output signals from said processing means, said processing means causing said indicator means to normally automatically display a crosslevel value in response to each measurement signal received by said processing means which is a function of said measurement signal value, said processing means further operating upon the receipt thereby of a first number of measurement signals to compare said first number of measurement signals to obtain a maximum differential value indicative of the maximum differential between the values of the individual measurement signals in said first number of measurement signals and to subsequently compare said maximum differential value to a first reference value. 15. The crosslevel measuring adapter of claim 14, wherein a display control means is connected to said processing means, said display control means being operative when activated to cause said processing means to change the value displayed by said indicator means. 16. The crosslevel measuring adapter of claim 15, wherein said indicator means is operative to display a crosslevel value, a warp value and a crosslevel index value, said processing means causing said indicator means to normally display a crosslevel value automatically, the processing means normally operating to cause said indicator means to display warp values and crosslevel index values in response to activation of said display control means. 17. The crosslevel measuring adapter of claim 16, wherein a warp value displayed by said indicator means is a function of said maximum differential value. 18. The crosslevel measuring adapter of claim 17, wherein said processing means operates when said maximum differential value exceeds said second reference value to cause said indicator means to automatically display a warp value which is a function of the maximum differential value which exceeds said first reference value. 19. The crosslevel measuring adapter of claim 14, wherein said processing means operates after the receipt thereby of said first number of measurement signals and upon receipt of a second number of measurement signals which includes and is greater than said first number of measurement signals to obtain absolute differences between successive values of said second number of measurement signals, to sum said absolute difference values to obtain a total difference value and to compare said total difference value to a second reference value. 20. The crosslevel measuring adapter of claim 19, wherein said processor means operates to cause said indicator means to automatically display a crosslevel index value which is a function of said total difference value when said total difference value exceeds said second reference value. 21. The crosslevel measuring adapter of claim 20, wherein a display control means is connected to said processing means, said display control means being operative when activated to cause said processing means to change the value displayed by said indicator means. 22. The crosslevel measuring adapter of claim 21, wherein said indicator means is operative to display a crosslevel value, a warp value and a crosslevel index value, said processing means causing said indicator means to normally display a crosslevel value automatically, the processing means normally operating to cause said indicator means to display warp values and crosslevel index values in response to activation of said display control means. 23. The crosslevel measuring adapter of claim 22, wherein a warp value displayed by said indicator means is a function of said maximum differential value. 24. The crosslevel measuring adapter of claim 23, wherein said processing means operates when said maximum differential value exceeds said second reference value to cause said indicator means to automatically display a warp value which is a function of the maximum differential value which exceeds said first reference value. 25. The crosslevel measuring adapter of claim 24, wherein said housing means includes a central opening extending longitudinally therethrough to receive said inclination measuring bar and battery receiving chambers extending on opposite sides of said central opening. 26. A crosslevel measuring adapter for attachment to an inclination measuring bar to gauge the crosslevel, warp and crosslevel index of a pair of railroad tracks by measuring the inclination between adjacent points on the surfaces of the two tracks as a crosslevel measurement comprising a housing, an inclination sensing means mounted within said housing, said inclination sensing means operating to provide a measurement signal having a value indicative of the amplitude of inclination sensed by said inclination sensing means, processing means connected to receive said measurement signal and indicator means connected to said processing means and operative to display values in response to output signals from said processing means, said processing means operating upon the receipt thereby of a first number of measurement signals to obtain an absolute difference between adjacent measurements, and to then sum said absolute difference values to obtain a total difference value as a crosslevel index value for display by said indicator means. 27. The crosslevel measuring adapter of claim 26, wherein said processing means operates to cause said indicator means to display successive crosslevel values, each of which is a function of a measurement signal value received by said processing means. 28. The crosslevel measuring adapter of claim 27, wherein a display control means is connected to said processing means, said display control means being operative when activated to cause said processing means to change the value displayed by said indicator means. 29. The crosslevel measuring adapter of claim 28, wherein said processing means causes said indicator means to normally automatically display said crosslevel values, the processing means normally operating to cause said indicator means to display a crosslevel index value in response to activation of said display control means. 30. The crosslevel measuring adapter of claim 29, wherein said processing means operates to compare said total difference value with a first reference value, said processing means operating when said total difference value exceeds said first reference value to cause said indicator means to display the crosslevel index value indicative of said total difference value without activation of said display control means. 31. The crosslevel measuring adapter of claim 26, wherein said processing means operates to compare at least the first and second measurement signal values received thereby to obtain an offset difference value therefrom, said processing means operating to apply said offset difference value as a correction value to each subsequent measurement signal value as a zero correction. 32. The crosslevel measuring adapter of claim 31, wherein said processing means operates upon the receipt thereby of a second number of measurement signals which is less than said first number of measurement signals to compare said second number of measurement signals to obtain a maximum differential value indicative of the maximum differential between the values of the individual measurement signals in said second number of measurement signals as a warp value for display by said indicator means.
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