Hello all,
I want to build an ECU for a model turbine engine. Inputs would be RPM and Exhaust gas temperature. This data would be manipulated in a PIC, probably a 16F877, and would control the fuel pump which controls the turbine speed etc. to prevent over speeding the turbine etc. Model turbines idle at approximately 30,000 - 40,000 RPM and, depending on the model built, would run at 120,000 - 150,000 RPM.
Questions: 1. Has any forum member attempted a project like this?
2. To determine RPM one can use either a Hall affect sensor or a LDR system or possibly turbine pressure. At these speeds, which would be the better option? Worried about the affect of sunlight on a LDR system! How would this be connected to the PIC?
3. Temperature would be measured with a thermo couple, probably the K-Type. How would one connect the thermo couple to the PIC? Would one need some sort of amplification circuit? Temperatures to be measured up to 650 - 700 degrees Celsius.
I realise I am way out of my depth here as a complete novice but I think it would be a very rewarding project. Any comments or advice in this regard would be really appreciated.
PS. The PIC would have a 16X2 line LCD display connected to show temperature, RPM, battery voltage, fuel pump setting and a few other readings relative to the project.
Thank you all in advance.
Barry.
I want to build an ECU for a model turbine engine. Inputs would be RPM and Exhaust gas temperature. This data would be manipulated in a PIC, probably a 16F877, and would control the fuel pump which controls the turbine speed etc. to prevent over speeding the turbine etc. Model turbines idle at approximately 30,000 - 40,000 RPM and, depending on the model built, would run at 120,000 - 150,000 RPM.
Questions: 1. Has any forum member attempted a project like this?
2. To determine RPM one can use either a Hall affect sensor or a LDR system or possibly turbine pressure. At these speeds, which would be the better option? Worried about the affect of sunlight on a LDR system! How would this be connected to the PIC?
3. Temperature would be measured with a thermo couple, probably the K-Type. How would one connect the thermo couple to the PIC? Would one need some sort of amplification circuit? Temperatures to be measured up to 650 - 700 degrees Celsius.
I realise I am way out of my depth here as a complete novice but I think it would be a very rewarding project. Any comments or advice in this regard would be really appreciated.
PS. The PIC would have a 16X2 line LCD display connected to show temperature, RPM, battery voltage, fuel pump setting and a few other readings relative to the project.
Thank you all in advance.
Barry.