Questions tagged [sensor]
The sensor tag has no usage guidance.
118
questions
1
vote
0
answers
25
views
Parameter value in bias instability modeling
In IMU error modeling, bias instability/flicker noise is often modeled by a first order Gauss-Markov process whose standard deviation is equal to the given BI coefficient [1, p.185][2, p.31]. Because ...
- 11
0
votes
1
answer
53
views
Estimator of accelerometer offset
I would like to estimate the offset of my accelerometer without using anything but measurements of the sensor. Is there any estimator for this? Averaging all the data points would probably do the ...
- 115
0
votes
2
answers
38
views
Estimate bits per pixel from RAW photo
Nowadays many consumer products like smartphones or action cameras support RAW photos. Typically, they spit out a DNG/TIFF file with 16 bit values. However, the actual bit depth of the A/D is rather ...
- 103
0
votes
0
answers
22
views
How to sync two similar lists/waveforms with differently populated data in python?
I have two lists of sizes L1 - 22400(865*26) and L2 - 79000 with measurements of some environmental data. Data of both the lists are measured simultaneously. The L2 is a continuous measurement for ...
0
votes
0
answers
38
views
Upsampling realtime data for sensor fusion
I am doing a real-time sensor fusion of gps and imu streams using a Kalman filter. Both streams are obtained independently (with geolocation and accl-gyro values) in real time. I am doing this in ...
- 1
2
votes
2
answers
196
views
Gyroscope sensor drift problem at speed
I have an iPhone mounted on a bike to measure the slope of the road in real-time. This works pretty well at first but as soon as I speed up, the reported pitch starts to drift. I'm using CoreMotion ...
- 23
0
votes
1
answer
46
views
Minimum amount of data needed for low pass filter on real time sensor data
I need to apply a low pass filter up to a period of 10 hours to my data. My sensor has a sampling rate of 1 sample every 5 minutes. I need to know how much data I at least need to have to be allowed ...
- 1
0
votes
0
answers
65
views
Correcting Drift and Stepped Pattern in Pressure Sensor Data
I’m observing drift and a stepped pattern in data from a piezoelectric pressure sensor measuring constant atmospheric pressure. the results are the following:
The data should ideally be a flat line ...
0
votes
0
answers
26
views
Would an image sensor with photosites arranged irregularly to reduce aliasing be feasible?
I’m guessing it’ll be more computationally complex considering the irregularly sampled image would have to be converted to a regularly sampled one and probably a different demosaicing algorithm would ...
0
votes
0
answers
12
views
Is movesense magnetometer in NED or ENU reference frame? / How to determine magnetometer reference frame
I can't find an axis diagram for the movesense sensor, nor does it say on the spec sheet on the website - Is the magnetometer in the NED or ENU reference frame? On SO there is an answer that doesn't ...
- 3
1
vote
0
answers
8
views
Accelerometer beacon as game controller lag
As part of our product, we use a sensor/beacon to measure the inclination/angle of the product. We do this with a KKM 3-axis accelerometer (model: https://www.kkmcn.com/long-range-beacon-k5p). However,...
- 111
6
votes
2
answers
541
views
Modelling MEMS accelerometer noise
I am trying to compare two MEMS accelerometers in terms of their noise for ground motion monitoring applications. I would like to take some "clean" data (recorded by good quality ...
- 63
0
votes
0
answers
51
views
Detecting camera raw image saturation/clipping level
I'm looking for a fast but robust algorithm to detect whether a camera raw image has clipped/saturated highlights and, if so, compute the level at which saturation occurs. This saturation/clipping ...
1
vote
1
answer
46
views
Line sensor data generating data array
I have a line sensor with a $n$ number of detector elements, pixels.
This line sensor should be used to capture data while moving so that later from the captured data images can be generated. The ...
- 11
0
votes
0
answers
56
views
Sampling Frequency of a Rotational Sensor
In the picture above you can see a sensor I've been dealing with, called a "Caliper". This sensor arm simply passes over the pits or bumps on a disk rotating with a constant angular velocity ...
- 3