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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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2answers
182 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 ...
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4answers
793 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 ...
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1answer
273 views

Using Armatures in Morse Robotic Simulator

I'm trying to add my own robot in Morse 1.1 (using Ubuntu 12.04). I am struggling to add an armature actuator and armature pose sensor to an existing robot. Can someone please explain how this can be ...
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4answers
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Autonomous car steering using IR sensors

I want to steer a RC car in a straight line.The car has 4 sharp IR sensors on each corner of the car to help it steer the corridor.The corridor is irregular and looks something similar to the picture ...
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3answers
5k 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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3answers
771 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
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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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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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2answers
358 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
57 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 ...
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1answer
615 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
4
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1answer
149 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,...
3
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1answer
118 views

Typical method for integrating a neural net into a PLC

How would one typically integrate a neural network into an online automation system? As an example, we have developed a neural network that predicts a difficult to measure variable within a reactor ...
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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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3answers
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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 ...
5
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3answers
33k 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: ...
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
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 ...
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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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1answer
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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
246 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 ...
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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
299 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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2answers
993 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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2answers
59 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 ...
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3answers
2k 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
573 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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1answer
93 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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4answers
599 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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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 ...
3
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2answers
7k 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 ...
4
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2answers
457 views

What is an effective distribution of grayscale sensors on robot

I'm working on a robotics project, and I am using grayscale sensors to automatically follow a black line: turning 90 degrees, going round in a circle, and passing through gaps in the lines etc. I was ...
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3answers
519 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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3answers
122 views

Controlling a system with delayed measurements

Assume I have a rather simple system I want to control, but all sensor measurements exhibit considerable time delay, i.e.: $z_t = h(x_{(t-d)}) \neq h(x_t)$ With my limited knowledge about control, ...
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0answers
185 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 ...
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2answers
312 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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0answers
136 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 ...
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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
243 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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1answer
1k views

How does a six-axis force/torque sensor work?

I would really like a six-axis force/torque sensor for my robot, but I just can't afford one. I was thinking about making one of my own. I have experience using strain gauges, but I can't work out ...
5
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1answer
737 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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2answers
614 views

How can I build a 10cm-200cm IR range sensor?

Everybody here is probably aware of the Sharp distance sensors (GP2Y0 series, e.g. GP2Y0A02YK0F). They use a diode to emit infrared light and measure the angle of the reflected light with a PSD (i.e. ...
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2answers
77 views

Could piezoelectric sensors be crushed?

I have found some load sensors (piezoelectric) that measure relatively small weights (on the order of ~ grams). That's what I need! However... Around my robot, there will occasionally be bursts of ...
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2answers
406 views

How to implement a distance proximity sensor with wider range

More in the line of robotics observing their environment, I'm trying to implement a proximity sensor that can sense objects in front of it to a least up to $-30^ \circ \space$ to $\space+30^ \circ $ ...
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2answers
327 views

Quadrocopter build - Do these parts look fine?

I am completely brand new to quadrocopter building. I am currently about to start building a Quad. I have done a little bit of research and was thinking of buying the following parts: KK2.1 Hobbyking ...
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0answers
57 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 ...
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4answers
148 views

Why linkage-based haptic devices are much more common than cable (tension)-based ones?

According not only to this link, but in my humble opinion to common sense as well, cable-based haptic devices have got lower inertia and are less complicated mechanically. I also believe that ...
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0answers
195 views

Simplest way to do object tracking with a 2D range finder sensor? [closed]

My current class assignment is to program a robot through a course that includes two moving obstacles – other robots moving at constant speed around a region the one robot must get to. Since the other ...
4
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1answer
501 views

Solutions for Finding Position and Heading in a Multi-Level House

I was wondering if you could reccomend possible solutions for locating a robot within a multilevel house. What seems obvious to me is that need an altitude sensor to derive the story the robot, and a ...