Method of process monitoring in a machine

Patent metadata

Field	Value
Publication number	US-11755000-B2
Application number	US-201816769916-A
Country	US
Kind code	B2
Filing date	Dec 4, 2018
Priority date	Dec 7, 2017
Publication date	Sep 12, 2023
Grant date	Sep 12, 2023

Abstract

A method is disclosed comprising retrieving captured process data comprising video and/or audio data capturing at least part of the execution of events in a machine, retrieving at least a first signal representing a measurable machine condition responsive to the events executed, wherein a first sequence of said machine control instructions is configured to trigger a respective first set of said events for execution thereof, determining first time stamps of the machine control instructions, aligning the first time stamps with second time stamps determined for at least one of; i) times of execution of said first set of events determined from the captured process data; ii) the first signal and associated measurable machine condition retrieved in response to execution of said first set of events, displaying a representation of the first sequence of machine control instructions, associated with the first time stamps, together with an output representation said second time stamps.

First claim

The invention claimed is:

1. A method of process monitoring in a food packaging machine being configured to execute a plurality of events, the events being associated with respective machine control instructions, the method comprising:
retrieving captured process data comprising at least one of video or audio data capturing at least part of the execution of the events,
retrieving at least a first signal representing operation of one or more components of the food packaging machine during production of one or more packaged food containers responsive to the events executed in a process being monitored,
determining a first sequence of said machine control instructions configured to trigger a respective first set of said events, said machine control instructions, when executed by a controller of the food packaging machine, causing the one or more components of the food packaging machine to execute the events to produce the one or more packaged food containers,
determining first time stamps of the machine control instructions in said first sequence in response to triggering respective events in said first set, with reference to a master clock,
determining a chronological sequence of the first time stamps indicating times of execution of the first sequence of said machine control instructions and second time stamps determined with reference to said master clock for at least one of:
times of execution of said first set of events determined from the captured process data, or
the first signal and associated measurable machine condition retrieved in response to execution of said first set of events, and

displaying the chronological sequence for a synchronous monitoring of the first sequence of said machine control instructions and operation of the one or more components of the food packaging machine according to at least one of the master clock of the execution of said first set of events, determined from the captured process data, or of the first signal, wherein alignment of the first and second time stamps indicates correct operation of the one or more components of the food packaging machine to produce the one or more packaged food containers and misalignment of the first and second time stamps indicates an erroneous operation of the one or more components of the food packaging machine due to one or more errors in the first sequence of said machine control instructions,
wherein detection of the erroneous operation of the one or more components of the food packaging machine due to one or more errors in the first sequence of said machine control instructions results in troubleshooting the machine control instructions and optimizing a control process of the food packaging machine.

2. The method according to claim 1 , wherein the second time stamps are determined with reference to said master clock for:
times of execution of said first set of events determined from the captured process data, and
the first signal and associated measurable machine condition retrieved in response to execution of said first set of events.

3. The method according to claim 1 , wherein the method comprises:
receiving a user input to select a first machine control instruction, whereby an associated first time stamp determined for the execution of the first machine control instruction is aligned with a second time stamp determined with reference to said master clock for a first event triggered by the first machine control instruction, and
displaying an output representation of the captured process data of the first event at a time defined by the second time stamp as the user input to select the first machine control instruction is received.

4. The method according to claim 1 , wherein the method comprises:
receiving a user input to select a first machine control instruction, whereby an associated first time stamp determined for the execution of the first machine control instruction is aligned with a second time stamp determined with reference to said master clock for a first event triggered by the first machine control instruction, and
displaying an output representation of the first signal as retrieved in response to execution of the first event at a time defined by the second time stamp as the user input to select the first machine control instruction is received.

5. The method according to claim 3 , comprising:
receiving a sequence of said user input for a scrolling selection amongst the first sequence of machine control instructions, and
displaying at least one of an output representation of said captured process data, or an output representation of said first signal, having an associated second time stamp, synchronously with the scrolling selection with reference to the master clock.

6. A non-transitory storage medium comprising instructions which, when executed by a computer, cause the computer to carry out the method according to claim 1 .

7. A system for process monitoring in a food packaging machine being configured to execute a plurality of events, the events being associated with respective machine control instructions in a controller, the system comprising:
a recorder configured to:
retrieve captured process data comprising at least one of video or audio data capturing at least part of the execution of the events, and
retrieve at least a first signal transmitted by a sensor and representing operation of one or more components of the food packaging machine during production of one or more packaged food containers responsive to the events executed in a process being monitored,

a processor configured to communicate with the controller and further configured to:
determine a first sequence of machine control instructions configured to trigger a respective first set of said events, said machine control instructions, when executed by the controller of the food packaging machine, causing the one or more components of the food packaging machine to execute the events to produce the one or more packaged food containers,
determine first time stamps of the machine control instructions in said first sequence in response to triggering respective events in said first set, with reference to a master clock, and
determine a chronological sequence of the first time stamps indicating times of execution of the first sequence of machine control instructions and second time stamps determined with reference to said master clock for at least one of:
times of execution of said first set of events determined from the captured process data, or
the first signal and associated measurable machine condition retrieved in response to execution of said first set of events, and

a display configured to display the chronological sequence for a synchronous monitoring of the first sequence of said machine control instructions and operation of the one or more components of the food packaging machine according to at least one of the master clock of the execution of said first set of events, determined from the captured process data, or of the first signal, wherein alignment of the first and second time stamps indicates correct operation of the one or more components of the food packaging machine to produce the one or more packaged food containers and misalignment of the first and second time stamps indicates an erroneous operation of the one or more components of the food packaging machine due to one or more errors in the first sequence of said machine control instructions,
wherein detection of the erroneous operation of the one or more components of the food packaging machine due to one or more errors in the first sequence of said machine control instructions results in troubleshooting the machine control instructions and optimizing a control process of the food packaging machine.

8. The syste

Assignees

• Tetra Laval Holdings & Finance

Inventors

• Carlsson Magnus

Classifications

• G05B19/4184 Primary

  characterised by fault tolerance, reliability of production system · CPC title

• G05B2219/31479

  Operator select part of process he wants to see, video image is displayed · CPC title

• Y02P90/02

  Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS] · CPC title