Collected-current monitoring device

Patent metadata

Field	Value
Publication number	US-10377240-B2
Application number	US-201615771673-A
Country	US
Kind code	B2
Filing date	Nov 1, 2016
Priority date	Nov 2, 2015
Publication date	Aug 13, 2019
Grant date	Aug 13, 2019

Abstract

A collected-current monitoring device includes a current-value obtaining unit for obtaining current values I1 and I2; a first RMS-calculation unit for calculating a root mean square (RMS) 1 of the current value I1 at a window width W; a second RMS-calculation unit for calculating a root mean square (RMS) 2 of the current value I2 at the window width W; a determining unit for determining whether a combination of the RMS 1 and the RMS 2 satisfies an abnormality condition; an abnormality-signal output unit for outputting an abnormality signal when the abnormality condition is satisfied; an information-obtaining unit for obtaining railway vehicle information; and a setting unit for setting a set-parameter that includes at least one of the window width W or the abnormality condition depending on the railway vehicle information.

First claim

The invention claimed is:

1. A collected-current monitoring device comprising:
a current-value obtaining unit configured to obtain a current value I1 of collected current flowing through a first current collector, and a current value I2 of collected current flowing through a second current collector;
a first RMS-calculation unit configured to calculate a root mean square (RMS) 1 of the current value I1 at a window width W;
a second RMS-calculation unit configured to calculate a root mean square (RMS) 2 of the current value I2 at the window width W;
a determining unit configured to determine whether a combination of the root mean square (RMS) 1 and the root mean square (RMS) 2 satisfies an abnormality condition;
an abnormality-signal output unit configured to output an abnormality signal when the determining unit determines that the abnormality condition is satisfied;
an information-obtaining unit configured to obtain railway vehicle information including at least one of a position or a speed of a railway vehicle that comprises the first current collector and the second current collector; and
a setting unit configured to set a set-parameter that includes at least one of the window width W or the abnormality condition depending on the railway vehicle information obtained by the information-obtaining unit.

2. The collected-current monitoring device according to claim 1 ,
wherein the abnormality condition is that
one of the root mean square (RMS) 1 or the root mean square (RMS) 2 is equal to or less than a threshold value A, and another one of the root mean square (RMS) 1 or the root mean square (RMS) 2 is equal to or greater than a threshold value B, and

wherein the threshold value B is greater than the threshold value A.

3. The collected-current monitoring device according to claim 2 ,
wherein the setting unit is configured to set the threshold value A and/or the threshold value B.

4. The collected-current monitoring device according to claim 3 , further comprising:
a table that defines a correspondence between the railway vehicle information and the set-parameter;
wherein the setting unit uses the table to set the set-parameter that corresponds to the railway vehicle information obtained by the information-obtaining unit.

5. The collected-current monitoring device according to claim 2 , further comprising:
a table that defines a correspondence between the railway vehicle information and the set-parameter;
wherein the setting unit uses the table to set the set-parameter that corresponds to the railway vehicle information obtained by the information-obtaining unit.

6. The collected-current monitoring device according to claim 1 , further comprising:
a table that defines a correspondence between the railway vehicle information and the set-parameter;
wherein the setting unit uses the table to set the set-parameter that corresponds to the railway vehicle information obtained by the information-obtaining unit.

7. The collected-current monitoring device according to claim 1 , further comprising:
a monitor unit configured to display an occurrence of malfunction based on the abnormality signal.

8. The collected-current monitoring device according to claim 1 , further comprising:
a control unit configured to control speed or acceleration of the railway vehicle based on the abnormality signal.

9. A collected-current monitoring device comprising:
a first current sensor configured to detect a current value I1 of collected current flowing through a first current collector;
a second current sensor configured to detect a current value I2 of collected current flowing through a second current collector;
a first RMS-calculation unit configured to calculate a root mean square (RMS) 1 of the current value I1 at a window width W;
a second RMS-calculation unit configured to calculate a root mean square (RMS) 2 of the current value I2 at the window width W;
a determining unit configured to determine whether a combination of the root mean square (RMS) 1 and the root mean square (RMS) 2 satisfies an abnormality condition;
an abnormality-signal output unit configured to output an abnormality signal when the determining unit determines that the abnormality condition is satisfied;
a monitor unit configured to display an occurrence of malfunction based on the abnormality signal;
a control unit configured to control speed or acceleration of the railway vehicle based on the abnormality signal;
an information-obtaining unit configured to obtain railway vehicle information including a position and a speed of a railway vehicle that comprises the first current collector and the second current collector; and
a setting unit configured to set a set-parameter that includes at least one of the window width W or the abnormality condition depending on the position and the speed of the railway vehicle shown in the railway vehicle information.

10. A method comprising:
obtaining a current value I1 of collected current flowing through a first current collector, and a current value I2 of collected current flowing through a second current collector;
calculating a root mean square (RMS) 1 of the current value I1 at a window width W;
calculating a root mean square (RMS) 2 of the current value I2 at the window width W;
determining whether a combination of the root mean square (RMS) 1 and the root mean square (RMS) 2 satisfies an abnormality condition;
outputting an abnormality signal when it is determined that the abnormality condition is satisfied;
obtaining railway vehicle information including at least one of a position or a speed of a railway vehicle that comprises the first current collector and the second current collector; and
setting a set-parameter that includes at least one of the window width W or the abnormality condition depending on the railway vehicle information.

Assignees

• Tokai Ryokaku Tetsudo Kk

Inventors

• Ahiko Yuichi
• Nakamura Kotaro
• Shimoyama Hiroki

Classifications

• G05B23/024

  Quantitative history assessment, e.g. mathematical relationships between available data; Functions therefor; Principal component analysis [PCA]; Partial least square [PLS]; Statistical classifiers, e.g. Bayesian networks, linear regression or correlation analysis; Neural networks · CPC title

• B60L3/00

  Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption (methods or circuit arrangements for monitoring or controlling batteries or fuel cells B60L58/00) · CPC title

• B60L3/12

  Recording operating variables {; Monitoring of operating variables} · CPC title

• B60L2200/26

  Rail vehicles · CPC title

• B60L5/38 Primary

  for collecting current from conductor rails (B60L5/40 takes precedence) · CPC title