Questions tagged [sensors]

A sensor (also called detector) is a converter that measures a physical quantity and converts it into a signal which can be read by an observer or by an (today mostly electronic) instrument.

Filter by
Sorted by
Tagged with
1
vote
3answers
3k views

Small IR distance sensor that works on black surfaces

Can anyone recommend an IR distance sensor that works on black surfaces? I'm looking for something to use as a "cliff" sensor, to help a small mobile robot avoid falling down stairs or off a table, ...
0
votes
1answer
538 views

What is the easiest and efficient way to detect human in close range distance and make the robot follow it? [closed]

I am having a thesis right now regarding a robot. My research requires the robot to be attached to linear guide rail. A robot has to detect human in a very close range (of about 2 meters distance). ...
4
votes
1answer
753 views

Filtering IMU angle discontinuities

I try to measure Euler angles from an IMU, but some discontinuities happens during measurement, even in vibrationless environment, as shown in the images below. Can someone explain which type of ...
0
votes
2answers
234 views

Crock Pot Knob Turner

I have a Crock Pot with an analog knob and would like to find a way to turn the knob by using and appliance timer. I have no idea where to begin. I need help. Thanks
1
vote
1answer
279 views

Ways to estimate the drift rate of the gyrometer

I found not so much literature to the topic, this is why I ask here. Does someone know some ways to estimate the drift rate of the gyrometer. I was thinking about basically two approaches. One would ...
1
vote
1answer
75 views

Where should I put the angle sensor on my cart-pole robot?

I'm using an accelerometer and gyroscope to detect the angle and tilt rate on my two-wheeled cart-pole robot. Is there an optimal height to place the sensors? Should I place them closer to the ...
2
votes
2answers
93 views

Aligning datasets with drift

I have a dataset that contains position information from tracking a robot in the environment. The position data comes both from a very accurate optical tracking system (Vicon or similar) and an IMU. I ...
1
vote
3answers
3k views

How to connect ethernet based Hokuyo scanner?

This is a very basic beginner question, I know, but I am having trouble connecting to the Hokuyo UST-10LX sensor and haven't really found much in terms of helpful documentation online. I tried ...
1
vote
1answer
324 views

Balancing a plate with an IMU offset from the center

I recently bought a IMU . I am new at this. My question: Does the positioning of the IMU matter? Are there any differences between placing it at the center of the plate or if it is offset from the ...
0
votes
1answer
214 views

“Thermal Imaging” with Arduino and/or Lego Mindstorm NXT 2.0?

I'm trying to build a robot that can be sent into rooms/buildings and detect people using nxt and/or Arduino. In addition to this I would like to be able to view what my robot is "seeing" in real-time ...
2
votes
0answers
98 views

2D Positioning of mobile robot [closed]

I am just starting to explore an idea and I am somewhat of a novice in robotics. I am looking to position a mobile robot as accurately as possible on a concrete slab. This would be during new ...
-2
votes
1answer
53 views

IR 40kHz receiver [closed]

These days I'm trying to build IR 40kHz long range receiver. I use ir phototransistor. I don't want to use components like TSOP... I need to make daylight filter and intensify filtred signal because ...
-1
votes
1answer
614 views

How to calculate vehicle detection distance

I would like to know how to calculate the distance to each car when I run my application for an autonomous vehicle in real time. In addition I want to know how implement the calculation in C++. You ...
4
votes
2answers
127 views

Air hockey with a robot as an opponent

I'm not sure if this is the right place to post this but here goes. So, as the title states, I'm planning on building a desk that doubles as an air hockey table which has a robot on the other side. ...
4
votes
1answer
828 views

Wall following using hokuyo lidar and sharp IR sensors

I have a mobile robot and I would like it to follow the walls of a room. I have: A map of the room. Wheel encoders for the odometry. A Kalman filter for fusing data from wheel encoders and IMU. A ...
0
votes
1answer
52 views

recommendation for really high precision attitude measurement sensors

I am new in this field, I am looking for some high precision gyroscopes and accelerometers for attitude measurements.The precision requirement is around 0.2~0.5 deg/s dynamic. I have done some ...
2
votes
2answers
102 views

Positioning Sensor

I would like to locate the position of a stationary autonomous robot in x-y-z axis relative to a fixed starting point. Could someone suggest sensors that would be suitable for this application? I am ...
5
votes
1answer
2k views

Simple Sensor Fusion for pose estimation

I am currently working on a balancing robot project, which features fairly low-cost sensors such as an 9-Dof IMU with the measurement states $\textbf{x}_\text{IMU} = \left[a_x, a_y, a_z, g_x, g_y, ...
2
votes
2answers
110 views

Which sensor type most accurately measures position?

We're building an 6dof joystick, and we need to accurately measure the displacement of our central device. We can easily use a mechanical connection to the edges, but there has been some discussion ...
0
votes
2answers
478 views

How does the cliff sensors on ROOMBA work through a glass wall?

I want to use IR sensors to detect whether my dustbin is full but I want to protect it from outside dust. I am planning to use the IR sensors on Roomba. How are they working despite a plastic wall? ...
4
votes
1answer
179 views

Sensors' field of view in car driving

I want to develop an autonomous driving RC car. For detecting obstacles, I plan to mount 3-5 ultrasonic sensors in the front and in the back the car. What is the minimum necessary combined field of ...
7
votes
4answers
976 views

How to localise a underwater robot?

I am building an autonomous underwater robot. It will be used in swimming pools. It should be capable of running in any normal sized pool, not just the pool in which I test. So I cannot rely on a ...
2
votes
4answers
4k views

Detecting the presence of a person in a room

I am working on my first hobby project and I'm not very familiar with sensors yet. I am trying to build a system which detects the presence of a person in a small room with a single entrance/exit door....
1
vote
1answer
77 views

Improving Velocity estimation

I have a sensor reduction model which gives me a velocity estimate of a suspension system(velocity 1) . This suspension system estimate velocity is used to calculate another velocity(velocity 2) via ...
0
votes
4answers
842 views

What is the cheapest way to detect and identify vehicles entering a gate in real time?

I want to detect and identify each of the vehicles passing through a gate. I have the live video feed of the gate which I initially thought to process and detect the number plates with the help of ...
1
vote
1answer
848 views

How can I make a quadcopter avoid obstacles using infrared?

I have a quadcopter built, and I need to be able to make it to autonomously follow a route and avoid obstacles where possible. My general plan is to have an array of sensors on a pre-defined "front". ...
3
votes
3answers
812 views

Sensing the level of a liquid in a tube

I'm looking to build a sensor which will detect the level of liquid in a tube. It does not have to be precisely accurate, just detect whether the level is approximately above a certain height. The ...
3
votes
1answer
2k views

Cheap and efficient 3D sensor?

I'm searching for a cheap (under 100$) and efficient 3D sensor, which detects obstacles and moving objects, for robot applications like quadrotor navigation, swarm robotics, etc. Can you suggest a ...
1
vote
1answer
309 views

Measuring angular displacement using the TI-SensorTag

I've looked around but can't find the answer, to what I hope is a simple question. I'm working with a TI-SensorTag, and I want to be able measure the rotation around the unit's Z-axis. Basically I ...
1
vote
2answers
360 views

Depth image sensor for integration into robot

I know there are lots of consumer depth image sensors: kinect, primesense, structure.io, leap motion, ... But I'm looking for something that is more suitable for integration into robot, something ...
0
votes
1answer
643 views

building a quadcopter using STM32F3 Discovery board

how do you calculate the PID values and stabilise the quadcopter using the on board sensors The gyro accelerometer and magnetometer
6
votes
2answers
6k views

Questions regarding 3D scanning and camera choice [closed]

A few days ago, I just shared my concerns about the price of computer vision hardware on this same exact forum (see What main factors/features explain the high price of most industrial computer vision ...
1
vote
1answer
515 views

ROVER 5 with 2 encoders help

am 2 weeks old to arduino projects..i had been using timing all this while to control my rover...now, i wanted to shift to using encoders..am facing quite some problems..am using arduino uno and a two ...
4
votes
1answer
150 views

Simple way of 3d perception

I wonder is there any simple (can be computed in microcontroller level) option which is suitable for 3d object perception (depth, position, pose or coordinate estimation) of flying robots except LIDAR,...
6
votes
3answers
3k views

What main factors/features explain the high price of most industrial computer vision hardware?

I am a student who is currently working on a computer science project that will require soon computer vision and more specifically stereoscopy (for close depth detection). I am now looking for a great ...
2
votes
3answers
341 views

Detect polyethylene

First of all, I am in high school[to tell you that I am a newbie and lack knowledge] What I want to achieve for now is a thing that can differentiate between poly bags[polyethylene] and other stuffs. ...
1
vote
1answer
178 views

Shallow underwater wireless sensor network [closed]

I need to make shallow (max 2m) underwater wireless sensor network. Data payload is about 10kB/s. I know that VLF band (~3-30kHz)could be the best solutions for that, but cause of time-to-market I ...
0
votes
2answers
109 views

Dynamically detect changing obstacles

So the idea is that there would be one robot acting as overwatch, which would detect all of the obstacles in an area (which are not necessarily static), and then send the data about the obstacles' ...
1
vote
1answer
58 views

Glasses with eye sensors

Someone could tell me if there are wearable devices such as glasses, with sensors that can detect eye movement? In particular, I would need a device like google glass, having a sensor or a camera ...
2
votes
1answer
2k views

Calculating acceleration and velocity

I'm writing some Quad Copter software and beginning to implement an altitude hold mode. To enable me to do this I need to get an accurate reading for vertical velocity. I plan to use a Kalman filter ...
0
votes
1answer
36 views

Remote Control Relative to Driver

Is it possible to remote control a 'robot' relative to the driver with an angle sensor (or any other sensor)? For example, if the robot starts in this position ...
5
votes
4answers
2k views

Does an electronic compass work underwater

I'm building a submersible ROV, so I need a way to navigate. So using a compass would help but this brings up the question, does an electronic compass work underwater? My thoughts are the water might ...
1
vote
2answers
2k views

Is it possible for a robot to navigate through predefined coordinates?

I am a total newbie in robotics so please bare with me. I have a school project where my team has to design a robot that is capable of picking up 3 golf balls in different sizes at predefined ...
1
vote
2answers
267 views

Detect human in proximity? [closed]

I'm looking for ways to detect human presense behind walls in close proximity (around 10 feet) in whatever way possible! Problem is I can't code! (I hope it's ok I'm posting here.) I know there are ...
-3
votes
1answer
84 views

I am doing a project on robotic surgeries! Can anyone help me and give me some details related to this topic? [closed]

Can anyone help me, because I am doing a project on robotical surgeries and I would like someone to help me and advise me. I wonder if anyone could give me some data on tests he or she has run in a ...
0
votes
2answers
253 views

Ball and plate possible sensors use

I am looking for sensors to give me the position of a ball on a plate in order to make a ball and plate problem . What came to my mind is to use image processing but since i never did some serious ...
6
votes
3answers
12k views

Stereo camera Vs Kinect

Any one can advice me on the ideal perception sensors for pick and place application using a robotic manipulator with ROS support. I have generally looked at things like Kinect and stereo cameras (...
1
vote
4answers
444 views

Don't understand how sensor works, metal wired directly to I/O pin of arduino

I'm trying to understand how an electronic musical instrument (called an e-chanter) works (imagine a recorder or other wind instrument, but with the holes replaced with metal contacts, and the sound ...
1
vote
4answers
4k views

Computer vision with single camera vs. distance sensors for obstacle detection [closed]

I am going to start a new project consisting in implementing an autonomous driving RC car. The car as it is now, has a camera installed on each side of the car, i.e. 4 cameras in total. They are ...
1
vote
2answers
39 views

Sensor that will produce a sinusoid phase locked to a high RPM Shaft

Is there a sensor that will produce a sinusoidal signal phase locked to a high RPM (7000 RPM) shaft? I am attempting to build a coaxial helicopter based on the architecture described in this paper ...

1 2 3
4
5
7