Many thanks Steve. I went to see what "sensors MEMS accelerometers" I did not know this fantastic technology, but thanks to this technology, it would be better able to understand from which coordinated the vibration arrives? I think that in the engine compartment direction of the vibration does not ...

Slowly I try to enter the world NVH, is not very easy, and I begin with the acquisition of signals only on ok engines , to understand what frequencies and amplitudes are correct, I wanted to ask you, who is more experienced than me, what it means to the symbols X and Y on the sensor and how to explo...

I used a program to capture images called Fastone capture . but you can used the Paint a windows program, how to use it? You choose the image from the screen Pico, Or any screen, even the one you are watching now, press the button on the keyboard "Print"; You open the Paint program, which you should...

If possible, I want to bring experiences of sensor use WPS in the study of the cylinder pressure waveform, The purpose of my test is to verify that the pressure waveform corresponds closely to what is happening in the engine. I chose a very simple engine and mechanically, which to experiment, it is ...

The signal line can No problem is speculate and electrical levels are ok, to collect more reliable measurements on bus line serves a special probe that limits the noise due to the impedance of the input channels of Pico. In cars Renault communication problems, they are due: to internal failures of t...

Thanks Steve for your work, I would add:
Adblue (DEF) heater current signal ;
Adblue (DEF) heater voltage signal ;
Air conditioning (AC) EV variable displacement current ;
Air conditioning (AC) EV variable displacement voltage ;
Best regards

I exploit the discussion, to ask, if possible in the future, more names to describe the waveforms, such as: new systems multiair; Valvetronic systems, (actuator and position sensor); Devices for handling urea; actuator and position sensor, but above all actuating devices, such as plates command wind...

This signal has no noise, it is normal, the slight waves are normal.
Regard

I do not know the system, but if the charge of the alternator is managed by a control unit, the difference between the two acquisitions is caused by a logic of the ECU. If as I think the alternator is classic, without control, the problem is he, who can not generate enough power. The idea of ​​a bat...

I think that if you disassemble the starter you can see if the flywheel is loose, if you have a camera with a sensor, if you take away the speed sensor and you look in the hole after about 90 to 100 degrees after the reference mark can be observed the damage on the flywheel. The defect is too repeti...