Wednesday, August 16, 2017

Cool open source tool for ER diagrams

Recently one of my colleagues introduced me to a cool Java tool called SchemaSpy.
SchemaSpy is a java tool that can be used to create beautiful database documentation and also ER diagrams.

Would highly recommend perusing the following links and utilizing this tool:

Monday, August 07, 2017

Ruminating on Telematics standards

While creating training material for our internal staff on telematics, we found the below site that gives a very good introduction to novices on the basics of telematics -

I had covered the business benefits of telematics in this blog post. One of the fundamental challenge for the wide spread adoption of telematics has been the lack of standards around aggregating data from multiple TCU (Telematics Control Unit) vendors.

But now, the Association of Equipment Managers (AEM) and Association of Equipment Management Professionals (AEMP) have created a ISO standard to help systems
from different manufacturers all speak the same language -

The AEMP 1.0 standard defined a XML data format that is available here.
An example of the AEMP REST API by John Deere is available here (in both XML and JSON formats) -

The newer version (v 2.0) of the AEMP telematics standard is now an ISO standard (ISO 15143-3).
An example of ISO 15143-3 telematics API (with XML data format) is here.

As part of this standard, equipment makers would report the following data points and 42 fault codes using a standard protocol that will allow mixed equipment fleets to be managed from a single application.

Data Elements
  1. Serial Number
  2. Asset ID
  3. Hours
  4. Location
  5. GPS Distance Traveled
  6. Machine Odometer
  7. Fault Codes
  8. Idle Time
  9. Fuel Consumption
  10. Fuel Level
  11. Engine Running Status (on/off)
  12. Switch Input Events
  13. PTO Hours
  14. Average Load Factor
  15. Max Speed
  16. Ambient Air Temp
  17. Load Counts
  18. Payload Totals
  19. Active Regen Hours

Fault Codes
  1. Engine coolant temperature
  2. Engine oil pressure
  3. Coolant level
  4. Engine oil temperature
  5. Hydraulic oil temperature
  6. Transmission oil temperature
  7. Engine overspeed
  8. Transmission oil pressure
  9. Water in fuel indicator
  10. Transmission oil filter, blocked
  11. Air cleaner
  12. Fuel supply pressure
  13. Air filter pressure drop
  14. Coolant system thermostat
  15. Crankcase pressure
  16. Cool water temp, outlet cooler
  17. Rail pressure system
  18. ECU temperature
  19. Axle oil temp, front
  20. Axle oil temp, rear
  21. Intake manifold temperature
  22. Secondary steering pressure
  23. After-treatment reagent internal filter heater
  24. Crankcase ventilation 
  25. Boost pressure
  26. Outgoing brake pressure status
  27. Brake pressure, output
  28. Brake pressure, output
  29. All wheel drive hydraulic filter, blocked
  30. All wheel drive hydraulic filter, blocked
  31. Brake pressure acc status
  32. Injection control pressure
  33. Brake circuit differential pressure
  34. Brake pressure acc charging
  35. Brake pressure actuator
  36. Reserve steering control pressure
  37. HVAC water temperature
  38. Rotor pump temperature
  39. Refrigerant temperature
  40. Alert and alarms help power down machines quickly
  41. Multiple pressure indicators
  42. Switching gear events