Method and Device for Automatically Detecting a Thermal Anomaly in Equipment
AssigneeThales
InventorsPhilippe DUBEDAT, Joseph RECROSIO, Marine DELLIS
Life of this patent
Estimating the term…
Abstract
The present invention relates to a method for automatically detecting a thermal anomaly of equipment, including the steps of: Calculating Teq(t), towards which the temperature T(t) of the equipment tends in the vicinity of t, verifying, by local extrapolation of T(t) in an exponential form: T ( t + Δ t ) = T e q ( t ) + [ T ( t ) - T e q ( t ) ] · e - Δ t τ predicting an asymptotic equilibrium temperature {circumflex over (T)}eq(t), based on usage variables, characterizing the use and context of use of the equipment at instant t; determining based on Teq(t)−{circumflex over (T)}eq(t) the presence of a thermal anomaly of the equipment.
Claims10
A method for automatically detecting a thermal anomaly of equipment, the method being implemented by an electronic detection device and comprising during an operational period of the equipment:
- i. collecting the current temperature values T(t) of the equipment at times t during the operational period;
- wherein the method further comprises, during the operational period of the equipment:
- ii. based on the current temperature values T(t) collected, calculating Teq(t), named asymptotic equilibrium temperature, towards which the temperature of the equipment tends in the vicinity of t, verifying, by local extrapolation of T(t) in an exponential form:
- T
-
- (
- t
- +
- Δ
-
- t
- )
- =
- T
- e
-
- q
- (
- t
- )
- +
- [
- T
-
- (
- t
- )
- -
- T
- e
-
- q
- (
- t
- )
- ]
- ·
- e
- -
- Δ
-
- t
- τ
- ;
- and
- iii. collecting the values of usage variables, characterizing the use and context of use of the equipment at each instant t, collectively referred to as the vector xusage(t);
- iv. providing the usage vectors xusage(t);
- as input to a prediction block adapted to predict the asymptotic equilibrium temperatures at times t, {circumflex over (T)}eq(t), based on the vectors xusage(t);
- v. calculating the difference between the calculated and predicted asymptotic temperatures:
- {circumflex over (ε)}(t)=Teq(t)−{circumflex over (T)}eq(t) and determining based on at least said difference, the presence of a thermal anomaly of the equipment.
A device for automatically detecting a thermal anomaly of equipment, the device being adapted to, during an operational period of the equipment, collect the current temperature values T(t) of the equipment at times t during the operational period;
- said device being adapted to, based on the current temperature values T(t) collected, calculate Teq(t), named asymptotic equilibrium temperature, towards which the temperature of the equipment tends in the vicinity of t, verifying, by local extrapolation of T(t) in an exponential form:
- T
-
- (
- t
- +
- Δ
-
- t
- )
- =
- T
- e
-
- q
- (
- t
- )
- +
- [
- T
-
- (
- t
- )
- -
- T
- e
-
- q
- (
- t
- )
- ]
- ·
- e
- -
- Δ
-
- t
- τ
- ;
- said device being adapted to collect the values of usage variables, characterizing the use and context of use of the equipment at each instant t, collectively referred to as the vector xusage(t);
- said device including a prediction block, said device is adapted to provide the usage vectors xusage(t) as input to said prediction block adapted to predict the asymptotic equilibrium temperatures at times t, {circumflex over (T)}eq(t), based on said vectors xusage(t);
- said device being adapted to calculate the difference between the calculated and predicted asymptotic temperatures:
- {circumflex over (ε)}(t)=Teq(t)−{circumflex over (T)}eq(t) and to determine based on at least said difference, the presence of a thermal anomaly of the equipment.
Dependencies are inferred from the claim text.