Hot answers tagged

3

The answer is $\vec{G}$! and also any $\vec{\tau}$ torque caused by it, if the axis connecting the geometrical center of the sensor (assuming it measures torques relative to its geometrical center) to the centre of gravity of the gripper. $\vec{G} = m * \vec{g}$ where $m$ is the mass of the gripper, $g$ is the gravitational ACCELERATION, not force and G is ...


2

As-is, the question is off-topic, but if I rephrase it as "Is it possible to use multiple IR sensors near each other?" then the answer is no. IR sensors are the mix of genius and dumb that I love - it does rangefinding by shining a light and measuring the reflection. That's it. You typically wind up needing to calibrate to particular objects, ...


2

The problem you are describing is quite similar to line following from a controls perspective, there is a difference in how the line is detected. Line following robots use a wide variety of ways to detect line. Simplest is probably photo-resistors or phototransistors, however magnetic stripes (lines) and hall effect sensors have been quite popular in the ...


2

I can't use any line-following method. Actually, you are quite wrong, the way I understand the problem. It is a line-following. It is just that the line is not painted (like on the road). The line is the edge of the table. The way I see it, your robot needs to look up, and detect the line "painted" by the edge of the table on the ceiling. Once the ...


2

Usually, most underwater robots are running on just inertial navigation and surfacing occasionally. This tends to work better than one would expect and is what most large scale deployments end up using. Additionally, most of these use a Doppler Velocity Log, Pressure Sensor, and Compass in addition to their IMU. Geophysical localization is fairly precise, ...


2

Can I use current sensing to measure the torque on a wormgear drive? Nope as the worm-gear is not back-driveable by construction. what would be the best path forward? Using an FT sensor mounted at the end-effector would be the best solution but they are expensive. Replacing the worm-gear with a BLDC motor being careful about the gear ratio. In fact, a ...


2

It looks like a leaf switch. A search on AliExpress for "leaf switch" and sort by price gave me this


2

You are correct. It's just a matter of interpretation. (1) is the guess on the location of the true value whereas (2) is simulating your sensor behavior. Your equation in (1) can be converted to N(z,sigma) = z + N(0,sigma) witch is eventually same as your second equation. Can we set Σ=Σ^, i.e. can we use the covariance learned in (2) in the setting described ...


2

Yes, it's possible as long as you are willing to spend a couple of million dollars to develop a MIPI to PCI-E interface board. If you are just trying to use the camera on your broken iPhone, forget about it. If you really need high speed 12M pixel camera, use machine vision cameras. Ethernet version is faster than USB. Anyway, you need an "interface ...


1

It may be worth noting that $\Sigma$ does not just describe "how far" the true value $\boldsymbol{x}$ is from $\boldsymbol{z}$ , but "where" in relation to it, the difference is apparent when the distribution is not 'circular' in the multidimensional case. Also, a Gaussian is a symmetric distribution, and only under that condition the ...


1

Look at the Duckietown project. It is a robot (the Duckiebot) and an urban environment for learning about robotics and autonomy. There is an Edx MOOC and curriculum designed for undergraduate university level. The Duckiebot can be purchased as a kit from the Duckietown org, or you can build your own DIYDuckie. Duckiebot is based on Python and ROS2 and ...


1

I think you're swapping the bytes in your multi-byte messages. Considering just the battery charge and capacity, you said: Here one as UINT8s: 19, 38, 21, 0, 25, 9, 253, 26, 10, 137, 28, 10, 46, 29, 10, 77, 30, 10, 86, 31, 10, 83, 46, 0, 31, 47, 0, 65, 48, 0, 59, 49, 0, 22, 50, 0, 24, 51, 0, 6, 50 I get a battery capacity of 35082 while battery charge is ...


1

We developed this for pipeline inspections and used this to map a pipeline. We found magnetism not to be very reliable and did it without. It works, but you have accumulative errors that can be significant. In our case you will try to find reference points and make corrections for these accordingly. And with a pipeline you always have 2 reference points ...


1

You can find a wide selection of pattern projectors here, some of them have eye-safety features, other are better than AMS projectors in the sense that the pattern is much more random.


Only top voted, non community-wiki answers of a minimum length are eligible