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URL: Copy. Presentation Description application of sensor. Sensors constitute the perceptual system of a robot. Sensors do not deliver state!

For example, we can simply react to the sensor output : if the switch is open, stopif the switch is closed, go. More complex sensors both require and allows to do more complex processing. Slide 6: We can ask the following question: "given the sensory reading I am getting, what was the world like to make the sensor give me this reading. This process bridges the areas of: electronicssignal processingand computation.

Why does that matter? Because it means that your robot needs a brain to do this processing. What does the brain have to have to process sensors: : What does the brain have to have to process sensors: analog or digital processing capabilities i.

If we do that, we end up with a large, bulky, and ineffective robot. Historicallyperception has been treated poorly: perception in isolation; perception as "king"; perception as reconstruction. Traditionally these approaches came from computer visionwhich provides the most complex data. Not a good idea to separate and reconstruct The best is Sensor Integration Approach: The best is Sensor Integration Approach Instead, it is best to think about these as a single complete design: the task the robot has to perform the best sensors for the task the best mechanical design that will allow the robot to get the necessary sensory information to perform the task the body shape of the robot, the placement of the sensors, etc.

All biological sensors are examples of clever mechanical designs These designs maximize the sensor's properties: it's range correctness. Use ideas from Nature for Perception Proprioception - internal state: Proprioception - internal state Origin of received sensory information divides perception into Proprioception: sensing internal state e.

Sensors: Different Types of Sensors

Examples of proprioception : path integration dead-reconning balancing all movements Affordances: Affordances Affordances are "potentialities for action inherent in an object or scene" Gibsonpsychology The focus of affordances is the interaction between the robot and its environment Perception is biased by what needs to be done.

Robot thinks — what is my task? I see a chair because I want to sit on it I see a chair as something to avoid. I see a chair as something to throw at my enemy. Affordances: Affordances As a robot designer, you may not get the chance to make up new sensors. But you will always have the chance to design interesting ways of using the available sensors to get the job done.

It is often not only a chance but a necessity! Utilize the interaction with the world and always keep in mind the task.

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Food for thought: how would you detect people in an environment? How to detect people? For example, how would you detect people? Some options include: temperature: pyroelectric sensors detect special temperature ranges movement: if everything else is static shape: now you need to do complex vision processing color: if people are unique colored in your environment Let's think about something even more simple: how would you measure distance: ultrasound sensors give you distance directly time of flight infra red through return signal intensity two cameras i.This website uses proprietary and third-party cookies.

By browsing this website you accept the conditions of use. It has the capacity to interact with the environment and carry out different functions accordingly. If we compare robots to human beings, the sensors would be our senses. They send information to the control system the brain and we modify our behaviour and effect our surroundings through actuators parts of the body.

A robot also needs a source of power in order to function and a physical structure to sustain the elements it is made up of. The brain or controller board is like a small computer.

It is basically a microcontroller that can be connected to sensors senses and actuators muscles, voice, etc. A sensor is simply an electronic component that sends a smaller or larger amount of electricity according to a physical element, such as light, sound or distance, etc.

To connect a sensor to our board, we will first need to check if the sensor is digital or analogue. An actuator is an electronic component which can act on the surrounding environment. For example, a motor that moves a wheel, an LED that indicates which device is switched on, a loudspeaker that emits a warning sound, etc. Remember that your controller board is the brain of your machine, but it is more much limited than a human brain.

Throughout this course, you will get to know and learn how to use loads of sensors and actuators that will be really useful.

Getting familiar with Bitbloq 2. BitbloqBitbloq 2Easy. Learn about robotics and programming with Bitbloq 2. By bq. BitbloqBitbloq 2EasyFeatured. His passions include reading, basketball and robotics.

Alfredo Sanchez website.Sensors are sophisticated devices that are frequently used to detect and respond to electrical or optical signals.

The mercury in the glass thermometer expands and contracts the liquid to convert the measured temperature which can be read by a viewer on the calibrated glass tube.

Criteria to choose a Sensor.

sensors in robotics ppt

There are certain features which have to be considered when we choose a sensor. They are as given below:. Range — Measurement limit of sensor.

sensors in robotics ppt

Calibration — Essential for most of the measuring devices as the readings changes with time. Resolution — Smallest increment detected by the sensor. Repeatability — The reading that varies is repeatedly measured under the same environment. Classification of Sensors. The sensors are classified into the following criteria:. Primary Input quantity Measurand. Transduction principles Using physical and chemical effects. Material and Technology.

Transduction principle is the fundamental criteria which are followed for an efficient approach. Usually, material and technology criteria are chosen by the development engineering group. Classification based on property is as given below:. Surface Plasmon resonance and Light addressable potentio-metric from the Bio-sensors group are the new optical technology based sensors. CMOS Image sensors have low resolution as compared to charge coupled devices. CMOS has the advantages of small size, cheap, less power consumption and hence are better substitutes for Charge coupled devices.

Accelerometers are independently grouped because of their vital role in future applications like aircraft, automobiles, etc and in fields of videogames, toys, etc. Classification based on Application is as given below:. Sensors can be classified based on power or energy supply requirement of the sensors:. Example: Radiometers, film photography. In the current and future applications, sensors can be classified into groups as follows:.

They are used for patient monitoring which includes pace makers and vehicle dynamic systems. They are used for food testing, medical care device, water testing, and biological warfare agent detection.

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They are used in consumer electronics, biometricstraffic and security surveillance and PC imaging. They are used in videogames and simulations, light activation and security detection. Types of Sensors.Jump to navigation. We're Open! Force sensors enhance the design of robotic applications by enabling advanced control technology. Force sensors provide a robot with haptic feedback, which allows for better overall performance.

This performance includes verifying grip forces, ensuring proper balance, and providing tactile feedback to an external source. Our force sensors are designed into robotic applications in various industries, ranging from medical to industrial. Choosing FlexiForce for your embedded force sensor application carries a variety of advantages over the competition, including:.

Our experienced engineering team works closely with you throughout each stage of the design process to ensure the best sensor design for your application. For customers who need custom application software to complement their sensors, we team up with trusted partners to combine our expertise and develop complete specialized solutions.

sensors in robotics ppt

Are you looking to integrate a force sensor into your medical device or application? FlexiForce force sensors can measure force between almost any two surfaces and are durable enough to stand up to most environments. Our sensors are available off-the-shelf for prototyping or can be customized to meet the specific needs of your product design and application requirements. The sensors are designed for use with your own electronics, multimeter, or our Quickstart Board.

For a full view and comparison of sensor products, please visit our Force Sensor Product Table. More FlexiForce A Sensor Most popular standard sensor that meets the requirements of most customers.

More FlexiPot Ring Position Sensor Thin, circular, tactile potentiometer used to identify position, location, or adjust output. More FlexiPot Strip Position Sensor Thin, rectangular, tactile potentiometer used to identify position, location or adjust output. The applications are only limited by your imagination! Please see below for a few samples. Grip Force Measurement with FlexiForce For grip force measurement, the thinness and flexibility of the FlexiForce sensor's construction More Improve Robot Balance and Grip with FlexiForce Force sensors improve a robot's balance and grip, which means fewer falls, better handling ofWhat is a Robot?

What are Sensors? Why do Robots Need Sensors? What can They do? Conclusions References. What Is A Robot??? Robots Machines with sensing, intelligence and mobility To be qualified as a robot, a machine should have the following capabilities: Sensing and perception: get information about itself and its surroundings Carry out different tasks Re-programmable: can do different things Function autonomously or interact with human beings.

What is Sensing? Collect information about the world. Each sensor is based on a transduction principle - conversion of energy from one form to another. Also known as transducers. Why To Use Sensors??? Chemical analysis beyond taste and smell Radiation: a, b, g-rays, neutrons, etc. Why Do Robots Need Sensors? Provides awareness of surroundings Whats ahead, around, out there? Classification of Sensors Proprioception Internal state v. Exteroceptive external state. Tactile Sensors There are many different technologies e.

Robotic Sensors PPT

For mobile robots these can be classified as tactile feelers antennae tactile bumpers Pressure-sensitive rubber with scanning array. Robot knows location of each beacon Compass on robot provides its orientation Robot computes distance, measures bearing. Learn more about Scribd Membership Home. Read Free For 30 Days. Much more than documents. Discover everything Scribd has to offer, including books and audiobooks from major publishers.

Start Free Trial Cancel anytime.What is a Robot? What are Sensors? Why do Robots Need Sensors? What can They do?

What is Proximity sensor - Type of sensors - Sensor Working Principle - Industrial sensor in Hindi

Conclusions References. What Is A Robot??? Robots Machines with sensing, intelligence and mobility To be qualified as a robot, a machine should have the following capabilities: Sensing and perception: get information about itself and its surroundings Carry out different tasks Re-programmable: can do different things Function autonomously or interact with human beings.

What is Sensing? Collect information about the world. Each sensor is based on a transduction principle - conversion of energy from one form to another. Also known as transducers. Why To Use Sensors??? Chemical analysis beyond taste and smell Radiation: a, b, g-rays, neutrons, etc. Why Do Robots Need Sensors? Provides awareness of surroundings Whats ahead, around, out there? Classification of Sensors Proprioception Internal state v. Exteroceptive external state.

Tactile Sensors There are many different technologies e.

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For mobile robots these can be classified as tactile feelers antennae tactile bumpers Pressure-sensitive rubber with scanning array. Robot knows location of each beacon Compass on robot provides its orientation Robot computes distance, measures bearing.There are different type of sensors are available to choose from and the characteristics of sensors are used for determining the type of sensor to be used for particular application.

Light sensor is a transducer used for detecting light and creates a voltage difference equivalent to the light intensity fall on a light sensor. The two main light sensors used in robots are Photovoltaic cells and Photo resistor. Other kind of light sensors like phototransistors, phototubes are rarely used.

Photo resistor - It is a type of resistor used for detecting the light. In photo resistor resistance varies with change in light intensity.

Robot Sensing and Sensors - PowerPoint PPT Presentation

The light falls on photo resistor is inversely proportional to the resistance of the photo resistor. Photovoltaic Cells - Photovoltaic cells are energy conversion device used to convert solar radiation into electrical electric energy. It is used if we are planning to build a solar robot.

Individually photovoltaic cells are considered as an energy source, an implementation combined with capacitors and transistors can convert this into a sensor.

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Proximity sensor can detect the presence of nearby object without any physical contact. The working of a proximity sensor is simple.

In proximity sensor transmitter transmits an electromagnetic radiation and receiver receives and analyzes the return signal for interruptions. Therefore the amount of light receiver receives by surrounding can be used for detecting the presence of nearby object. Ultrasonic Sensor - In ultrasonic sensors high frequency sound waves is generated by transmitter, the received echo pulse suggests an object interruption. Sound sensors are generally a microphone used to detect sound and return a voltage equivalent to the sound level.

Using sound sensor a simple robot can be designed to navigate based on the sound receives. Implementation of sound sensors is not easy as light sensors because it generates a very small voltage difference which will be amplified to generate measurable voltage change.

Temperature sensors are used for sensing the change in temperature of the surrounding. It is based on the principle of change in voltage difference for a change in temperature this change in voltage will provide the equivalent temperature value of the surrounding. Acceleration sensor is used for measuring acceleration and tilt. An accelerometer is a device used for measuring acceleration. Accelerometer is comes in different configuration.