I am working on a time critical project. I use an optical sensor. I would like to know the initialisation or boot time the sensor after power given which will be in µS. How could I measure that?
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1$\begingroup$ Welcome to Robotics, but I'm afraid that it is not clear what you are asking. We prefer practical, answerable questions based on actual problems that you face, so it's a good idea to include details of what you are using, what you want to achieve, what you tried, what you saw & what you expected to see. Please take a look at How to Ask & tour for more information on how stack exchange works and work through the Robotics question checklist to edit your question to make it clearer. $\endgroup$– N. BambergCommented Nov 13, 2018 at 9:03
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First crucial thing to know is what is your sensor - its part number, to be clear. If your sensor is digital, its initialization time is probably given in the datasheet.
If you are using analog one, check datasheet too - settling time might be one of values documented. If you can't find anything in the datasheet, you can perform simple test using oscilloscope:
- Place sensor in some stable state, ie. looking at uniform surface from a fixed position,
- Connect the probe to analog output of the sensor and probing ground to sensor's ground,
- Set oscilloscope to single trigger mode,
- Power up the sensor.
That way you can observe analog voltage rising from zero to some value, determining its initial settling time.
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$\begingroup$ +1. The information should be published in the datasheet. $\endgroup$– Chuck ♦Commented Nov 13, 2018 at 18:12