Coal mine methane gas flow measurement - practical exercise 01

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Practical exercise #01 – Calculating realtime gas flow using a Raspberry Pi, Arduino, & 4-20mA DP Sensor. …

Practical exercise #01 – Calculating realtime gas flow using a Raspberry Pi, Arduino, & 4-20mA DP Sensor.

Using open-source electronics prototyping platforms based on flexible, easy-to-use hardware and software to read a Differential Pressure from a 4-20mA sensor in a classroom environment.

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  • 1. Coal Mine Methane Gas FlowMeasurementPractical exercise #01 – Calculatingrealtime gas flow using a Raspberry Pi,Arduino, & 4-20mA DP Sensor
  • 2. Session OutcomeBy the end of the session participants should beable to:“Use open-source electronics prototypingplatforms based on flexible, easy-to-usehardware and software to read a DifferentialPressure from a 4-20mA sensor in a classroomenvironment.”
  • 3. Class Equipment Required• Raspberry Pi• Powered USB Hub• USB WiFi dongle• Arduino• Breadboard• Zener diode, resistors and jumper wires• Power Adapter 24V DC output• 24v DC/DC Converter• 4-20mA DP Sensor
  • 4. Raspberry Pi with Powered USB Huband Wifi dongle
  • 5. Arduino and 4-20mA DP Sensor
  • 6. Power Adapter 24V DC output with24v DC/DC Converter
  • 7. How to get started with theRaspberry Pi• Selecting the Distribution• Imaging the SD Card• Configuring Raspbian• Configure Raspberry Pi forRemote Shell, VNC, and FTP• Renaming the Raspberry Picomputer• Setup a Raspberry Pi with ahidden WiFi network• Working with DHCP• Simplified Setup for Arduinoon Raspberry Pi
  • 8. 4-20ma and loop powered• 24v DC Power source• 4-20mA Signal• Voltage dropped acrossthe 250 ohm resistor
  • 9. Arduino I/O Protection• Every I/O pin is to beprotected by a 5.1Vzener diode and 220ohm 30mA PTC(resettable fuse).• The equivalent circuit
  • 10. Arduino IDE• Initial test sketch• Uploading• Serial Monitor• Testing
  • 11. Arduino simple ModBus slave• Programming theArduino as a simpleModBus slave• Serial communications9600 8N1
  • 12. Symbolic Linking COM Ports• sudo ln -sf /dev/ttyACM0 /dev/ttyS3
  • 13. Qt• sudo apt-get installqtcreator
  • 14. ModBus Master• Compiling code in QtCreator• Testing with ModBusslave devices
  • 15. QModBus• Modifying make files• Compiling code in QtCreator• Testing with ModBusslave devices
  • 16. DP Sensor• 4-20mA signal• 220 ohm resister• ADC (0 – 1023)equivalent to 0 to 5 VDC
  • 17. Apache Tomcat & Java DevelopmentKit (JDK)• Installation of JDK• Installation of ApacheTomcat• Apache Tomcat WebApplication Manager
  • 18. ScadaBR• Installing WAR file inApache Tomcat• Configuring ScadaBR• Creating Data Sources• Using Watch Lists• Creating a simpleGraphic view
  • 19. Xively• Creating a DevelopmentDevice• Adding Channels• API Key, Feed ID, andDevice ID (aka Channel)• Configuring Publishersin ScadaBR
  • 20. Raspberry Pi Online Resourceshttp://www.raspberrypi.org/http://www.howtogeek.com/138281/the-htg-guide-to-getting-started-with-raspberry-pi/http://www.howtogeek.com/141157/how-to-configure-your-raspberry-pi-for-remote-shell-desktop-and-file-transfer/http://simonthepiman.com/how_to_rename_my_raspberry_pi.phphttp://www.dafinga.net/2013/01/how-to-setup-raspberry-pi-with-hidden.htmlhttp://baldwisdom.com/simplified-setup-for-arduino-on-raspberry-pi/http://forums.debian.net/viewtopic.php?f=16&t=61943
  • 21. Arduino Online Resourceshttp://www.arduino.cc/http://ruggedcircuits.com/html/ancp01.htmlhttp://erdosmiller.com/products/arduino-4-20ma-shieldhttp://arduino.cc/en/Tutorial/ReadAnalogVoltagehttps://code.google.com/p/simple-modbus/
  • 22. M2M Mango• http://mango.serotoninsoftware.com/download.jsp• http://tomcat.apache.org/index.html• http://macgyverdev.blogspot.com.au/2012/08/raspberry-pi-how-to-get-ssh-and-tomcat.html
  • 23. • http://qmodbus.sourceforge.net/
  • 24. Hartowijaya® is a provider of technical, project, drilling services and operational support for coalseam gas development projects in Australia and Indonesia.PO Box 11763, Mackay Caneland, Queensland 4740, Australiawww.hartowijaya.com