Stack Exchange Network

Stack Exchange network consists of 174 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.

Visit Stack Exchange

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.

4
votes
3answers
119 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, ...
3
votes
1answer
102 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 ...
8
votes
1answer
239 views

innovation step ekf localization?

Let's say we have a bunch of observations $z^{i}$ from sensor and we have a map in which we can get the predicted measurements $\hat{z}^{i}$ for landmarks. In EKF localization in correction step, ...
2
votes
1answer
114 views

Best strategy for area scanning using little sensing bots

I'm currently working on a school project about simulating robots scanning an area, but it has been a struggle to find what strategy the robots should use. Here are the details: I am given a certain ...
4
votes
1answer
491 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 ...
5
votes
4answers
145 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 ...
3
votes
2answers
870 views

Connect sensors to beaglebone/arduino in a complex robot

I'm building the biggest robot I've ever done. The hardware I have so far is as follows: HCR-Platform from DFRobot as a base x2 12V 146Rpm DC motor with two phase hall encoder x7 Sharp 2Y0A21 IR ...
2
votes
0answers
185 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 ...
7
votes
2answers
5k views

How to get prevent twisting of cables

I am planning to create a motor turret described in this question. But to simplify the problem, I'm thinking of a wind turbine with a generator in the main head that can rotate freely through 360 ...
3
votes
1answer
359 views

What approaches should I consider to create rotating a turret

First a bit of background, I am planning to make a highly maneuverable airship controlled by four thrust vectored propellers. I don't want to rely on a rudder and forward momentum for turns but ...
2
votes
3answers
491 views

Differential Drive Robot on uneven surfaces

So I am building a differential drive robot and I want it to autonomously drive in a straight line on an uneven surface. I know I need a position and velocity PID. As of now, I am deciding on which ...
2
votes
3answers
323 views

Position and Object Data Tracking [closed]

For a class project, I'm working with a weight stack: I'm trying to simultaneously measure: the position of a moving weight stack the value of the weight based on a calibrated/preloaded position in ...
0
votes
2answers
1k views

Datasheet for Taos TCS3200 GY-31 [closed]

Can someone please post the datasheet for the colour sensor mentioned above. All i can find is for TCS3200
1
vote
4answers
2k views

How to turn a rover 90 degrees using wheel encoders?

I have a four wheel DC rover with two optical wheel encoders. I'm executing rover turns by controlling the direction of wheel motion on either side of the rover. To turn left, all wheels on the left ...
2
votes
2answers
113 views

What is the Name of the part I'm describing

I'm looking for a part that will do a particular function. It has to be able to move along one axis and tell me the force that is being exerted on it. Kind of how like a piston moves inside an ...
3
votes
1answer
79 views

What different sensing approaches are used in the current batch of indoor 3D cameras?

I'm aware of the PrimeSense camera powering the Kinect. Are more advanced sensor types available now in the < $500 range? For example, has there been any sort of game-changer in structured light ...
1
vote
1answer
74 views

What's a good pose estimation method for high precision (<5mm per-axis) solutions at short range (<50cm)?

I'm trying to get a 6DOF pose solution for an object that'll be between 10 and 50 cm from a fixed point. I want to avoid putting too much special hardware on the object, but extra hardware on the ...
2
votes
2answers
388 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 $ ...
8
votes
1answer
824 views

Multiple position estimates fusion

I have a system in which I have two separate subsystems for estimating robot positions. First subsystem is composed of 3 cameras which are used for detecting markers the robot is carrying and which ...
4
votes
2answers
9k views

Altitude hold for quadcopter with Accelerometer and Barometer

I wonder currently how to implement an altitude control for a quadcopter. I have atm just a barometer/GPS and an accelerometer. Barometer and GPS are relatively straight forward implemented, but not ...
1
vote
2answers
76 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 ...
0
votes
2answers
322 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 ...
2
votes
2answers
233 views

Software libraries for parsing sensor data

What software libraries are there for assisting the general problem of parsing a stream of sensor data? We use various sensors like LIDARs and GPSINS units that provide messages in proprietary binary ...
2
votes
3answers
1k views

Reading data from D+ and D- pins of a USB

So I have this optical mouse with me, which has a PAN3504DL-TJ optical sensor. It has a USB interface and when I looked up the internet, all I could find was tutorials using A2501 or sensors in those ...
3
votes
2answers
207 views

Sensor for tracking relative position of human

I am making a robot that needs to continuously track the relative position of a human, up to 15 meters away and with at least 300 degrees coverage. Currently I am using a Hitechnic IRSeeker v2 sensor ...
0
votes
1answer
67 views

How to use TOA (Time Of Arrival) to measure 3-axis location of a wireless device? [closed]

I need to read the location of my device within a 1m radius sphere, with accuracy of 5-10cm. The device is handheld and wireless, and currently communicates using a Bluetooth v4 chip. I could add an ...
6
votes
6answers
974 views

How to measure displacement, cheaply and without using an accelerometer?

Motion is known to be confined in a sphere with radius of about 0.5m, and resolution doesn't have to be very high (5cm is enough). The device will actually be incorporated in a toy designed for kids. ...
1
vote
3answers
2k views

How are color sensors used for line following?

I have to build a line following robot that will be able to detect a selected colored line on the floor and start following it. How do color sensors do this after detecting the specific colored line?
3
votes
0answers
771 views

Alternatives to Primesense depth cameras? [closed]

I'm looking for low-cost depth cameras (less than 1000 USD) with a range of more than 3 meters. Currently, I have found only SoftKinetic DS-311 that meets these requirements. Here are some other ...
3
votes
4answers
2k views

Quadrocopter first build: how to tell if components play well together?

I'm building my first quadrocopter, and I'm trying to come up with a parts list that is suitable for a first build. I will use this to learn how to fly a quadrocopter manually (lots of crashes!), ...
6
votes
1answer
659 views

Electronic noses for detecting dog urine

I have very limited experience with sensors or robotic components at all, and I hope you will excuse the lack of detail in this Question. I want to set up posts around my yard with electronic noses ...
5
votes
1answer
5k views

How do ultrasonic range finders detect objects at an angle?

As far as I can tell, an ultrasonic rangefinder works by reflecting inaudible soundwaves off of objects and timing their return. But if the object has a flat surface and is angled with respect to the ...
1
vote
2answers
153 views

problem with simulated sensor in Matlab?

I'm simulating a sensor in 3D. The sensor should determine ($p, \theta, \phi$) from the origin where $\theta$ is the rotation about z-axis and $\phi$ is the rotation about x-axis. The sensor is given ...
0
votes
1answer
869 views

Tracking 2D positioning with IMU Sensor [duplicate]

I am using a miniature car and I want to estimate the position. We can not use GPS modules and most of the tracking systems that I saw, are using IMU senson with the GPS module. In our car we are able ...
1
vote
3answers
2k views

System for determining occupied seats in an auditorium [closed]

I need an app that can do live monitoring of whether each seat in an auditorium is occupied, so visitors can load the app and see where to sit. The auditorium has a relatively flat ceiling 4m ...
1
vote
1answer
1k views

How to choose WiFi signal strength detecting sensors

We want to create robot that will localize itself by the signals of wifi routers. Which sensors should we buy to detect strength of 3 WiFi signal? Which of following is necessary for us? http://www....
2
votes
1answer
85 views

How to gyroscopically measure number of rotations on one axis when there is concurrent random motion on another axis

Can a gyroscopic sensor (comparable to the type that are typically used in smartphones) that is embedded in this black object that is rotating around the X axis measure the number of rotations ...
8
votes
2answers
602 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. ...
1
vote
0answers
77 views

computer aided RC airplane combat

http://www.youtube.com/watch?v=4Vh_R1NlmX0 is from 2011 SWARM and shows RC aircraft or combat wings trying to hit each other in the air. Scoring a hit is pretty rare, and I'd like to increase a ...
3
votes
2answers
896 views

Line following robot with EV3 Colour Sensor

I am trying to build an advanced coloured lines following robot with the ability to differentiate between many different coloured lines and follow them. I am looking for the right sensor that will ...
1
vote
4answers
1k views

RC Transmitter Quadcopter with Arduino

I have a WL v262 quadcopter and I want to control it using Arduino instead of the joysticks on the transmitter. I opened up the transmitter and saw that each joystick has 2 potentiometers on the PCB ...
2
votes
2answers
3k views

360 degree ultrasonic beacon sensor

Basically, I want to detect an ultrasonic beacon in a radius around the robot. The beacon would have a separate ultrasonic emitter while the robot would have the spinning receiver. Are there any ...
1
vote
2answers
590 views

Are there any GPS sensors that provide data at 1Hz or faster?

I searched for GPS devices that provide 1 sec updates to server, but I have not found any. I found this T=30s.Module has sent a monitoring data packet. After 12 seconds the server sends an ...
6
votes
1answer
264 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 ...
2
votes
1answer
98 views

Compiling Code for EY-80

I recently purchased at EY-80 from electrodragon: EY-80 All in one 9-Axis Motion Sensor (Gyro + Acceler + Magneto + Baro) I am having a hard time compiling the example code on my arduino: This is ...
1
vote
0answers
541 views

1 cm accuracy radio rangefinder?

I need to track a point in space. The point is less than 2 m away, it has to be passive, no batteries, and no charging. I don't always have a line of sight. I need to pinpoint it to about a ...
3
votes
4answers
1k views

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 ...
3
votes
1answer
3k views

Is it possible to use HC-SR04 ultrasonic range sensor to indicate thickness of a material

The HC-SR04 is directly connected to an Arduino board with the receiver end(echo) connected to analog pin 2 and the transmitter (trigger) connected to digital pin 4. I am wondering if I can use the ...
1
vote
1answer
99 views

Any ideas for a robot? [closed]

I am in the FLL (First Lego League), and while we are waiting for the competitions, we want to work on a robot. Anyone have any ideas?
8
votes
4answers
1k views

Why do 3-axis accelerometers seemingly have a left-handed coordinate system?

Careful inspection of page 35 (figure 58) of the ADXL345 datasheet shows that under gravitational loading only, the chip uses a left-handed coordinate system. My own experiments with this chip ...