Questions tagged [sensor]
The sensor tag has no summary.
131 questions
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Research stuck at TRL-3 [closed]
In collaboration with a university in the UK I had done research on light detection by electronic photosensors. But the project is stuck at TRL-3 and we are not able to move forward.
Can someone ...
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Are rails affecting the magnetic fields generated by axle counters in railroad systems?
I have watched this video on axle counters of railway systems https://www.youtube.com/watch?v=W0YQ27mvEg0 and I found it very informative however it raised the following question for me:
The "...
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Quantum Sensing with cold atom for measuring acceleration
I am looking for a course/tutorial/article/book that would explain mathematically speaking how works a cold atom based quantum sensors to measure e.g. acceleration (either moving acceleration or ...
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Why doesn't sensor fusion of accelerometer and gyroscope data correct yaw drift in IMU quaternion estimation?
TL;DR
Combining accelerometer and gyroscope data gives no benefit for drift in yaw over time?
Introduction
I'm working with an IMU (Inertial Measurement Unit) that combines accelerometer and gyroscope ...
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Is there a function for how hot an object would have to be to compensate for the drop off after SSR is exceeded using a microbolometer?
I am wondering if there is a clean formula for how much hotter a given object would have to be to register at the same temperature after the spot-size ratio has been diminished for a given thermal ...
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Why am I getting higher sensor output when I have the tube I'm measuring filled with fluid?
I have a custom project to detect fluid color and turbidity (a reduction in light passing through) using an Arduino micro, a TCS3200 sensor, and an LED. The tube sits in a custom housing, and the LED ...
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1
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245
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What is a simple model of telescope sensitivity?
I am looking for a simple model of how sensitive a telescope is to low numbers of incoming photons. A train of individual photons hit one pixel of a detector, and I want to know what the numeric ...
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Pressure sensors vs. piezoelectric sensors
In simple terms, what is the difference between pressure sensors and piezoelectric sensors?
I did some google search online and could not come to a good conclusion.
Say you make a 'sensor' in the lab ...
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1
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160
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If we know forces and torques applied to one point of a rigid body, how do we calculate them for another point of a rigid body
Suppose we have a rigid body with known length $r$ that is fixed at point $A$.
We also have a force-torque sensor at point $A$.
The body is fixed such that it doesn't move.
We apply forces to point $B$...
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2
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117
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How does an airflow sensor work? [closed]
There are 4 piezoresistive sensors placed at A, B, C and D.
- 11
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1
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267
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Working principle of Shack-Hartmann Wavefront Sensor
(Image source: https://www.thorlabs.de/newgrouppage9.cfm?objectgroup_id=5287)
In the Shack-Hartmann wavefront sensor, the local slope of the incident beam's wavefront is measured as a displacement of ...
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201
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Weird EMF tester readings?
I bought a Digital EMF Tester Electric and Magnetic Field Radiation Detector here.
At first, I thought it was a metal detector since keyboards (without being inserted into a USB port) cause alarm, ...
- 117
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63
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Deriving Azimuth Algorithm: Limitations of Accelerometer and Gyro Sensor Setup
I have a navigation device for which I am trying to derive an azimuth algorithm. I am getting stuck with the derivation, as I'm pretty sure it is impossible given the hardware I have access to. I'm ...
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Help with estimating odometry using two lidar sensors with known extrinsic calibration
I have a setup consisting of two lidar sensors with a known extrinsic calibration. Both lidars have messages with the same timestamps (no timedelay between them). My goal is to estimate odometry using ...
- 11
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1
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88
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Is photon emission density is same or random everytime?
I want to know if photon density changes over time. By density, I mean number of photon hitting a surface in time. I am not asking about the direction of emission which is random. What I mean is that ...
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