Computer-implemented method of monitoring the operation of a cargo shipping reefer container
First Claim
1. A computer-implemented method of remotely monitoring the operation of a cargo shipping reefer container configured with a refrigeration system that has installed therewith a control computer coupled with sensors monitoring the operation of the refrigeration system, the method comprising:
- collecting, from the control computer, a first set of observation data and a second set of observation data comprising a respective first and second sequence of measurement values measured by sensors coupled to the control computer;
collecting preset values, from a database, that define settings for a cargo property value that defines thermo-dynamic properties of the cargo;
running a simulation model that receives the first set of observation data and the preset values as input and outputs simulated values, wherein the simulation model is configured to output the simulated values as estimates of the second set of the observation data;
computing an indicator value as a function of residual values computed from the difference between the values of the second set of observation data and the simulated values;
evaluating the indicator value against a predefined criterion and issuing an alarm signal in case the predefined criterion is exceeded;
processing a sequence of measurement values to estimate at least one of a level of the measurement values and a change in level;
comparing the at least one estimated level and change in level to a predetermined criterion;
issuing an alarm signal in case the predetermined criterion is exceeded; and
updating a condition of the cargo shipping reefer container in a database for scheduling maintenance of the cargo shipping reefer container based on the alarm signal.
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Accused Products
Abstract
Techniques for remotely monitoring the operation of a cargo shipping reefer container configured with a refrigeration system that has installed therewith a control computer coupled with sensors monitoring the operation of the refrigeration system include: collecting a first and second set of observation data comprising a respective first and second sequence of measurement values measured by sensors coupled to the control computer; running a simulation model that receives the first set of observation data as input and outputs simulated values; the simulation model is configured to output the simulated values as estimates of the second set of the observations; computing an indicator value as a function of residual values computed from the difference between the values of the second set of observations and the simulated values; and evaluating the indicator value against a predefined criterion and issuing an alarm signal in case the predefined criterion is exceeded.
8 Citations
20 Claims
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1. A computer-implemented method of remotely monitoring the operation of a cargo shipping reefer container configured with a refrigeration system that has installed therewith a control computer coupled with sensors monitoring the operation of the refrigeration system, the method comprising:
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collecting, from the control computer, a first set of observation data and a second set of observation data comprising a respective first and second sequence of measurement values measured by sensors coupled to the control computer; collecting preset values, from a database, that define settings for a cargo property value that defines thermo-dynamic properties of the cargo; running a simulation model that receives the first set of observation data and the preset values as input and outputs simulated values, wherein the simulation model is configured to output the simulated values as estimates of the second set of the observation data; computing an indicator value as a function of residual values computed from the difference between the values of the second set of observation data and the simulated values; evaluating the indicator value against a predefined criterion and issuing an alarm signal in case the predefined criterion is exceeded; processing a sequence of measurement values to estimate at least one of a level of the measurement values and a change in level; comparing the at least one estimated level and change in level to a predetermined criterion; issuing an alarm signal in case the predetermined criterion is exceeded; and updating a condition of the cargo shipping reefer container in a database for scheduling maintenance of the cargo shipping reefer container based on the alarm signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A computer-implemented method of remotely monitoring the operation of a cargo shipping reefer container configured with a refrigeration system that has installed therewith a control computer coupled with sensors monitoring the operation of the refrigeration system, the method comprising:
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collecting, from the control computer, a first set of observation data and a second set of observation data comprising a respective first and second sequence of measurement values measured by sensors coupled to the control computer; collecting preset values, from a database, that define settings for a cargo property value that defines thermo-dynamic properties of the cargo; running a simulation model that receives the first set of observation data and the preset values as input and outputs simulated values, wherein the simulation model is configured to output the simulated values as estimates of the second set of the observation data, further wherein the simulation model has a first mode being a default mode and a second selectable mode; computing an indicator value as a function of residual values computed from the difference between the values of the second set of observation data and the simulated values; evaluating the indicator value against a predefined criterion and issuing an alarm signal in case the predefined criterion is exceeded; processing a sequence of measurement values to estimate at least one of a level of the measurement values and a change in level; comparing the at least one estimated level and change in level to a predetermined criterion; and selecting the second selectable mode when the predetermined criterion is exceeded.
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20. A computer-implemented method of remotely monitoring the operation of a cargo shipping reefer container configured with a refrigeration system that has installed therewith a control computer coupled with sensors monitoring the operation of the refrigeration system, the method comprising:
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collecting, from the control computer, a first set of observation data and a second set of observation data comprising a respective first and second sequence of measurement values measured by sensors coupled to the control computer; collecting preset values, from a database, that define settings for a cargo property value that defines thermo-dynamic properties of the cargo; running a simulation model that receives the first set of observation data and the preset values as input and outputs simulated values, wherein the simulation model is configured to output the simulated values as estimates of the second set of the observation data; computing an indicator value as a function of residual values computed from the difference between the values of the second set of observation data and the simulated values; evaluating the indicator value against a predefined criterion and issuing an alarm signal in case the predefined criterion is exceeded; and preparing the simulation model for an ensuing period of simulation in response to detection of an ensuing trip of the reefer container, wherein the ensuing trip of the reefer container is detected as a pause of a predetermined length within which observation data from the respective reefer container has not been received followed by further observation data.
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Specification