Predicting temperature rise event

• US 10,657,801 B2
• Filed: 06/02/2017
• Issued: 05/19/2020
• Est. Priority Date: 06/08/2016
• Status: Active Grant

• Current Assignee: STS Defence Limited (Key Technologies Ltd.)
• Original Assignee: STS Defence Limited (Key Technologies Ltd.)
• Inventors: Yusuf, Syed, Garrity, David
• Primary Examiner(s): Nguyen, An T
• Application Number:
  US15/735,338
• Publication Number:
  US 20190012904A1
• Time in Patent Office: 1,082 Days
• CPC Class Codes: A62B 17/003 Fire-resistant or fire-fighters' clothes
• CPC Class Codes: G06F 1/163 Wearable computers, e.g. on a belt
• CPC Class Codes: G06N 3/048 Activation functions
• CPC Class Codes: G06N 3/084 Backpropagation, e.g. using gradient descent
• CPC Class Codes: G08B 17/06 Electric actuation of the alarm, e.g. using a thermally-operated switch
• CPC Class Codes: G08B 21/182 Level alarms, e.g. alarms responsive to variables exceeding a threshold
• CPC Class Codes: G08B 31/00 Predictive alarm systems characterised by extrapolation or other computation using updated historic data

Abstract

A method is provided for predicting occurrence of a temperature rise event caused by a fire within an environment. The method comprises receiving temperature data captured by at least one temperature sensor 6, 8 for sensing an ambient temperature in the environment, processing the temperature data captured by the at least one temperature sensor in a previous window of time using a trained machine learning model 16 to determine a risk indication indicating risk of the temperature rise event occurring in a future window of time, and outputting a warning indication in dependence on the risk indication determined using the machine learning model. This is useful for providing firefighters with advance warning of dangerous temperature rises such as flashover events.

Claims

1. A firefighter protection method for predicting occurrence of a temperature rise event caused by a fire within an environment, comprising:

receiving ambient air temperature data captured by at least one temperature sensor configured to sense an ambient air temperature within the environment, where at least one of the at least one temperature sensor is provided on a portable or wearable device which is portable or wearable by a firefighter;

processing the ambient air temperature data captured by the at least one temperature sensor in a previous window of time using a trained machine learning model to determine a risk indication indicative of a risk of the temperature rise event, which comprises a rise in the ambient air temperature within said environment, occurring in a future window of time, wherein the risk indication is based on one or more predicted ambient air temperature values for said future window of time predicted using the trained machine learning model;

when the risk indication satisfies a predetermined condition,

outputting a temperature rise warning indication in dependence on the risk indication determined using the machine learning model;

wherein the temperature rise warning indication comprises at least one of;

an audible indication, a visual indication, and a vibrating indication; and

the processing comprises processing the ambient air temperature data captured by the at least one temperature sensor in successive sliding windows of time using the trained machine learning model, to determine the one or more predicted ambient air temperature values for corresponding future sliding windows of time.

2. The method of claim 1, wherein the risk indication comprises an indication of one of a plurality of types of risk class.

3. The method of claim 1, wherein said predetermined condition comprises at least one of:

at least one of said one or more predicted air temperature values exceeding a temperature threshold; and

a rate of change of predicted air temperature values with time exceeding a rate of change threshold.

4. The method claim 1, wherein the trained machine learning model comprises an artificial neural network.

5. The method claim 1, wherein the trained machine learning model is selected from a plurality of trained machine learning models associated with different types of environment.

6. The method claim 1, comprising receiving ambient air temperature data captured by a plurality of temperature sensors configured to sense ambient air temperature at different heights within the environment, and processing the ambient air temperature data from the plurality of sensors using the trained machine learning model to determine the one or more predicted ambient air temperatures.

7. The method of claim 1, wherein said at least one temperature sensor comprises at least one remote temperature sensor configured to sense the ambient temperature at a location remote from the location of the remote temperature sensor.

8. The method of claim 7, wherein the remote temperature sensor comprises an infrared temperature sensor configured to sense temperature at the remote location based on infrared radiation incident on the infrared temperature sensor from the remote location.

9. The method of claim 1, wherein the at least one temperature sensor comprises at least one static temperature sensor disposed at a static location within the environment.

10. The method of claim 1, wherein the at least one temperature sensor comprises at least one body-worn temperature sensor disposed on a body-worn device within the environment.

11. The method of claim 10, wherein the body-worn device comprises a breathing apparatus for a firefighter.

12. The method of claim 10, wherein the body-worn device comprises a remote temperature sensor configured to sense ambient air temperature at a location remote from the location of the remote temperature sensor;

and the method comprises;

detecting one or more periods when an orientation of the body-worn device is outside at least one predetermined limit; and

excluding from the processing for determining the one or more predicted ambient air temperatures, temperature data captured by the remote temperature sensor during said one or more periods.

13. An apparatus comprising processing circuitry configured to perform the method of any of claim 1.

14. A non-transitory recording medium storing a program comprising instructions to control a data processing apparatus to perform the method of claim 1.

16. The method according to claim 1, wherein the temperature rise event comprises a flashover event.

15. Firefighter protection apparatus comprising:

at least one temperature sensor configured to sense an ambient air temperature within an environment surrounding the apparatus, where at least one of the at least one temperature sensor is provided on a portable or wearable device which portable or wearable by a firefighter; and

processing circuitry configured to;

process the ambient air temperature data captured by the at least one temperature sensor in a previous window of time using a trained machine learning model to determine a risk indication indicative of a risk of a temperature rise event, which comprises a rise in the ambient air temperature within the environment, occurring in a future window of time, wherein the risk indication is based on one or more predicted ambient air temperature values for the future window of time predicted using the trained machine learning model; and

when the risk indication satisfies a predetermined condition, control output of a temperature rise warning indication in dependence on the risk indication determined using the machine learning model; and

wherein the temperature rise warning indication comprises at least one of;

an audible indication, a visual indication, and a vibrating indication; and

the processing circuitry is configured to process the ambient air temperature data captured by the at least one temperature sensor in successive sliding windows of time using the trained machine learning model, to determine the one or more predicted ambient air temperature values for corresponding future sliding windows of time.