Diagnostic operation method and system for a transport vehicle automatic or semi-automatic access device

Patent metadata

Field	Value
Publication number	US-10907394-B2
Application number	US-201816162624-A
Country	US
Kind code	B2
Filing date	Oct 17, 2018
Priority date	Oct 18, 2017
Publication date	Feb 2, 2021
Grant date	Feb 2, 2021

Abstract

during one said cycle, information is acquired representative of the electrical energy consumed by the motor, or position or speed information provided by said encoder or binary information indicating positions of switches. The method further includes dividing said cycle into a plurality of functional segments based on said acquired information, calculating at least one descriptor value, and then establishing a health status diagnosis of the health status assessment system.

First claim

The invention claimed is:

1. A health status assessment method for a transport vehicle automatic or semi-automatic access device comprising at least one leaf suitable for being actuated by a kinematic chain including at least one motor supplied with electricity and having an associated angular position or rotation speed encoder, and at least one switch, the access device being movable between an open position and a closed position,
comprising steps, carried out by a processor, for at least one actuating cycle of the kinematic chain between a first position among the open and closed positions and a second position, different from the first position, from among the closed and open positions, consisting of:
during one said cycle, acquiring information relative to the kinematic chain comprising at least one piece of information representative of the electrical energy consumed by the motor, or position or speed information provided by said encoder or binary information indicating positions of switches of the actuating kinematic chain,
dividing said cycle into a plurality of functional segments based on said acquired information,
calculating at least one descriptor value per functional segment,
establishing a health status diagnosis comprising a degradation detection as a function of at least part of said calculated descriptor values,
and, when a degradation is detected, the method further includes:
calculating one or several individual health indicators per functional segment,
calculating at least one signature vector including at least some of the individual health indicators,
estimating a similarity measurement between said signature vector and at least one reference signature vector representative of a degradation, and
identifying the degradation based on the estimate of a similarity measurement.

2. The method according to claim 1 , wherein the division into functional segments further uses acceleration/deceleration information of the motor used from information provided by said encoder.

3. The method according to claim 1 , wherein each functional segment has an associated time interval, and wherein the descriptors are representative of the electrical energy consumed during said time interval or a duration of the functional segment.

4. The method according to claim 3 , comprising determining acceleration/deceleration information of the motor from position or speed information provided by said encoder, and wherein said descriptor values comprise values representative of the speed or the average acceleration/deceleration of the motor during the time interval associated with each segment.

5. The method according to claim 1 , comprising before establishing a diagnosis, calculating an overall health indicator based on a distance between a vector comprising all of the calculated descriptor values and a vector of reference values of corresponding descriptors previously stored.

6. The method according to claim 5 , wherein said distance is a statistical distance or a Euclidean distance.

7. The method according to claim 5 , wherein establishing a health status assessment comprises comparing the calculated distance to a predetermined health the operating threshold.

8. The method according to claim 1 , wherein the similarity measurement is a cosine similarity measurement.

9. The method according to claim 1 , further comprising estimating a detected degradation severity value, based on the signature vector and the reference signature vector associated with the identified degradation type.

10. The method according to claim 9 , wherein an alarm is raised when a detected degradation severity value exceeds a predetermined severity threshold.

11. The method according to claim 1 , further comprising acquiring context information before the division into functional segments, and wherein the calculation of at least one descriptor value per functional segment is done based on at least one piece of context information.

12. A health status assessment system for a transport vehicle automatic or semi-automatic access device comprising:
at least one leaf suitable for being actuated by a kinematic chain including at least one motor supplied with electricity and having an associated angular position or rotation speed encoder and at least one switch;
the access device being movable between an open position and a closed position; and
a computing unit including at least one processor, the at least one processor configured to accept and execute a plurality of instructions to implement said health status assessment system and suitable for carrying out, for at least one actuating cycle of the kinematic chain between a first position among the open and closed positions and a second position, different from the first position, from among the closed and open positions, said plurality of instructions including, 1) an acquisition of information, during one said cycle,
relative to the kinematic chain comprising at least one piece of information representative of the electrical energy consumed by the motor, or position, or speed information provided by said encoder or binary information indicating positions of switches of the actuating kinematic chain, 2) a division of said cycle into a plurality of functional segments based on said acquired information, 3) a calculation of at least one descriptor value per functional segment, and 4) establishment of a health status diagnosis comprising a degradation detection as a function of at least part of said calculated descriptor values, wherein the computing unit being suitable, for when a degradation is detected, to calculate one or several individual health indicators per functional segment, calculate at least one signature vector including at least some of the individual health indicators, estimate a similarity measurement between said signature vector and at least one reference signature vector representative of a degradation, and identify the degradation based on the estimate of a similarity measurement.

13. A transport vehicle including a plurality of automatic or semi-automatic access devices, each automatic or semi-automatic access device comprising at least one leaf able to be actuated by a kinematic chain including at least one motor supplied with electricity and having an associated angular position or rotation speed encoder, and being equipped with a health status assessment system for the automatic or semi-automatic access device according to claim 12 .

Assignees

• Alstom Transp Tech

Inventors

• Thevenet Quentin
• Lamoureux Benjamin
• Setan Frédéric
• Vagner Laurent

Classifications

• E05Y2400/36

  Speed control, detection or monitoring · CPC title

• E05F15/70 Primary

  with automatic actuation · CPC title

• E05F15/41 Primary

  Detection by monitoring transmitted force or torque (E05F15/48 takes precedence); Safety couplings with activation dependent upon torque or force, e.g. slip couplings · CPC title

• E05Y2400/50

  Fault detection · CPC title

• E05F15/60

  using electrical actuators · CPC title