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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.

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1answer
833 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
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3answers
718 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 ...
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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 ...
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1answer
272 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 ...
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2answers
354 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 ...
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1answer
588 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
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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 ...
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1answer
480 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 ...
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1answer
143 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,...
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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
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3answers
281 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. ...
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1answer
176 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 ...
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2answers
101 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' ...
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1answer
56 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
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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 ...
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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 ...
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4answers
1k 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 ...
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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 ...
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2answers
252 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 ...
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1answer
80 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 ...
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2answers
241 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
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3answers
10k 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 (...
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4answers
403 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 ...
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4answers
4k views

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

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 ...
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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 ...
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1answer
290 views

3D Camera for beginner [closed]

I want to buy a 3d camera with depth sensor. Can anyone can give me advice on which one will be the best? I have a experience with kinect, but configuring kinect for Linux is painful and also kinect ...
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3answers
1k views

How to program parallel PID control loops? So I can give my robot multiple set points to follow

So I'm in the process of building my robot and it has encoders on every wheel measuring speed and position and a compass sensor measuring heading. I have 3 seperate PID loops at the moment, I can ...
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2answers
535 views

Alternatives to cameras for a dirt sensor for an autonomous vacuum robot?

When I use a standard manual vacuum, I often notice that I have to pass over a spot several times because a single pass does not necessarily catch all the dirt. My eyes/brain can easily perceive this ...
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3answers
4k views

Arduino depth sensor

I'm looking for an arduino compatible depth sensor NOT for water. What I need is a sensor very similar to an Xbox kinect (but much smaller) that will tell me what is in front of the sensor and also ...
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4answers
2k views

what is the easiest method to plot a temperature in my pc? [closed]

After a lot of learning, I'm launching a reballing business and I feel the need to have a realtime plot of the temperatures involved (ideally 3 or 4) and I have an arduino uno and a few K type ...
2
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4answers
511 views

Simple yet effective angular position sensor to be used in robotic hand

What is the best yet simple to use angular position sensor? I am building a robotic hand and I want to implement this sensor at the joints of the fingers. I don't need a module, just an analogue ...
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2answers
747 views

Finding the position of a servo

I am building a collision avoidance system for my robot. As a part of this system I am using a pan and tilt kit (http://www.robotshop.com/en/lynxmotion-pan-and-tilt-kit-aluminium2.html) My aim is ...
3
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2answers
6k views

Plastic that's transparent to IR range sensors

Sharp IR range finders are pretty popular sensors, but I usually see them externally mounted and directly exposed to the environment which makes them prone to being damaged or getting crufty. I have ...
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1answer
90 views

Measuring the performance and response rate of ESCs

How would i go about measuring and quantifying the performance of an ESC? I am looking to measure the response rate(in Hz) of an ESC, as well as it's performance(i.e how fast it starts and stops, as ...
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2answers
58 views

Gyro rate gets increase problem

I am using PID controller to stabilize quadcopter. Its working well on the jig. But when I removed jig it went up and hit ceiling. I analyzed my data and from which I come to the conclusion that at ...
5
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3answers
442 views

Are there surface texture sensors for integration in circuits?

I have a project in mind for a robot which is able to recognize surfaces, and thought about including the following sensors: a temperature sensor a colour sensor, or a complex of electronic ...
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0answers
175 views

Arduino Lightsensor Blocking Code

I have a GY-31 Light sensor and I am trying to make a skittle sorting machine. There is a little wheel skittles can drop into then they are turn to 90 degrees read by the light sensor then dropped out ...
2
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2answers
933 views

Can I make an automatically-parking robot car with IR sensor?

It would be easy to understand if you imagine a robotic vacuum cleaner. (For some models) It goes back to a specific place automatically to recharge. Like this, I want to make a robot which ...
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0answers
132 views

control a robot with pymorse on MORSE simulator question

I am new to Morse and robotics. This code control the robot by giving the linear and angular velocity. This is the scene description ...
7
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4answers
3k views

Robot docking for self-recharging

I want to build a simple obstacle avoider robot, but this time I want it to be self-recharging so I am building a dock for this purpose, so I want it to be able to locate the dock and go for it when ...
2
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2answers
297 views

Is there an advantage to multiple magnetometers for heading computation

I'm building an autonomous sail boat (ripped out the guts of an RC sail boat and replaced with my own mainboard etc.) The controller board I have can accommodate both an MPU9150 and an HMC5883. Is ...
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3answers
29k views

How to estimate yaw angle from tri-axis accelerometer and gyroscope

I would like to estimate the yaw angle from accelerometer and gyroscope data. For roll and pitch estimate I've used the following trigonometric equations: ...
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1answer
77 views

Where do roboticists look for used sensors/hardware? [closed]

I recently built a self-driving vehicle-type robot for a competition, and am looking to sell sensors (GPS, INS, etc.) used in order to have money for the next project. Is ebay where people tend to go ...
3
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1answer
227 views

Is increasing gyro , accelerometer sensor range is good or bad ? how does it affect the accuracy

I've been using mpu6050 IMU unit ( gyro + accelerometer ) I found that I can set acc range to +/- 2g or 4g till 16 g and same for gyro +/- 250 deg/sec , 500 deg/sec and so I know that they are ...
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3answers
621 views

Robotc color sensor error

I am trying to write a simple program where the robot(Lego NXT2) will follow a blue line. ...
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7answers
5k views

What are some low cost alternatives for lidar? [closed]

It need not be as effective as lidar or it may have some disadvantages when compared with lidar. What are the probable alternatives? Edit: I'm intending to use it outdoors for navigation of ...
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2answers
1k views

What are the calculations for a badminton robot and mechanisms?

I am designing a badminton robot but i am very confused about mechanisms needed for a badminton robot and various calculations needed for millisecond response.I am also confused about calculations ...
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2answers
177 views

Can we use this line sensor as a proximity sensor?

I have an RSL Line Sensor which is designed to distinguish black and white lines. It detects white surface and gives me digital 1 as output, with 0 in case of black, but the surface needs to be close ...
5
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1answer
700 views

Yaw angle calculation for drone PID from two distance sensors

I'm building a control system with a Parrot AR 2.0 drone where I have access to thrust controls for up/down (z), left/right (y), forward/backwards (x), turn left and turn right (yaw) through a Ruby ...
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0answers
55 views

Can active sensor data be fed into an Autodesk Inventor Simulation?

I'd like to drive the position of various components within a virtual assembly based on sensor data being collected in real time from an external device. Does Inventor support such a setup? The goal ...