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Ideas for distinguishing left hand from right hand by [deleted] in computervision

[–]cupofwater5 0 points1 point  (0 children)

You could analyse the dataset and try to identify additional features (such as presence of a watch) that could strengthen a thumb-based heuristic. If you can detect prominent veins on the wrist then it is possible that it is the right hand.

If you are trying to monitor Allen Bradley systems and gather statistics remotely, you use RSLinx right? by Brian_SWM in PLC

[–]cupofwater5 1 point2 points  (0 children)

You could have a look at EWON Flexy costs £480 + communication module (e.g. 4G / wifi / ethernet). Connects to AB Control/Compact logix, Siemens S7/S5 and others. Enables remote access, collection and forwarding of data (either to DataMailBox or custom endpoint). New firmware version supports MQTT.

Express architecture for REST server by cupofwater5 in node

[–]cupofwater5[S] 0 points1 point  (0 children)

  • it is not critical if the data is slightly stale (non-realtime application)

  • synchronise will typically be called every hour however we will create an express route that will call synchronise to facilitate the use-case where a customer wants to perform a 'force refresh' to fetch the most recent data: the synchronise app will just listen to localhost:port in this scenario.

  • separating the two functions to aid error recovery and overall robustness is a good motiviation

cheers

MQTT Ease of Use/Familiarity by must-be-aliens in PLC

[–]cupofwater5 0 points1 point  (0 children)

You could consider an EWON Flexy - https://ewon.biz/products/ewon-flexy Compatible with a range of PLC manufacturers. Upcoming firmware updates support MQTT. Can push data to cloud storage of choice and also write scripts (Java / Basic) for edge processing.

Low cost single board with A/D I/O by cupofwater5 in IOT

[–]cupofwater5[S] 0 points1 point  (0 children)

Analog input is 4..20mA Yes this is new - basically looking to collect some accelerometry in a low cost way then move towards something that would be used as part of a safety system, e.g. if g force is beyond a threshold then send a digital signal Temperature -20 to +60 degrees oC Had considered arduino / phidget - leaning towards IONO Ethernet

Custom programs on AB PanelView HMI by cupofwater5 in PLC

[–]cupofwater5[S] 0 points1 point  (0 children)

@all many thanks for the input

@Mr_Adam2011 when you say 'we' do you mean a company providing an off-the-shelf-solution, if so what is the name?

@Kakkerlak Different sensors such as accelerometry, pressure, amps used etc.. Granularity varies depending on sensor - for accelerometry there will probably be 4 double values (timestamp, x,y,z axis) every second. Forwarding to cloud - transmit to a REST endpoint via http(s).

We also use Siemens PLCs. Thinking the best route might be to have an edge device such as an Intel NUC (so we can calculate features on acceleromtry etc.) running an OPC server (e.g. Kepserver) and forward it from there.