I am wondering, whether the ADIS16209 is a dynamic inclinometer, or to be specific:
Does it still give the accurate inclination value while being accelerated along one axis?
Thank you and with best regards
Thank you for your post and consideration of the ADIS16209. Since it uses an accelerometer-based approach, it was intended for static applications.
Ok, that is a pity, but thank you for the quick reply. Does Analog Devices offer any dynamc Inclinometer at all?
Or gyroscopes that do not drift more than 0.1° in one minute?
Many of our IMUs are capable of this. What environmental conditions apply in your application?
Ok, we need the DC inclination value during linear acceleration with an accuracy of at least 0.1° within ~1 minute. After one minute we are not interested in the inclination anymore.
Other environmental conditions:
- inclination range: +- 5°
- inclination only over one axis
- air pressure: 1-10 mBar
- applied linear acceleration: +- 2.5 g
- any output (analog or digital) is fine
- low mass: < 300 g
as this is very user specific, we could also continue this conversation in private?
It would seem like combining the accelerometer and gyroscope outputs from the ADIS16465 IMU would enable such an objective. We don't presently provide such sensor fusion routines, but we do know that this is pretty common for those with similar objectives. With respect to a private conversation, I think that this could be possible. Are you in contact with someone in our sales channel (with ADI or an authorized distributor). They are normally the ones who can make a request for private applications support on your behalf. If you do not have such a relationship in place, can I have someone from our local sales organization contact you?
Hm, the ADIS 16465 sounds interesting, I will check that. I will contact the sales team if it seems useful. The sensor fusion will not be easy, though. So I think we will also try to get a device that computes the fusion already. Thank you for your support!
We do have one product (ADIS16480) that does these computations, but its dynamic accuracy is not within your specifications and it has some requirements that could be limiting (must start-up in static inertial and benign magnetic environments, for instance). If you decide to try this out with the ADIS16465, we are certainly available to help with interpreting sensor responses.
Yes, the ADIS16480 has a linear acceleration effect of 0.009 °/s/g, so for 2g over 10s we would already have 0.18 ° deviation. That is probably too much for us. Regarding the ADIS16465: is the general relation between linear acceleration to the gyro data known? (eg: positive acc. -> linearly increasing angular speed, negative acc. -> linearly decreasing angular speed)
Understood. The ADIS16495-1 provides the best overall performance. I am not 100% sure that I understand what you mean by “general relationship,” but the Linear-g metric is post-calibration. In other words, what is easily observable has been corrected. Deeper correction might be possible, but would probably require some application-specific characterization and correction. I hope that helps.
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