This document discusses different types of proximity sensors, including inductive, capacitive, optical, and ultrasonic sensors. It describes the basic construction and working of each type, including their main components and how they detect nearby objects. The applications, advantages, and disadvantages of each proximity sensor type are also outlined. Major industries that use proximity sensors are described as machine tools, packaging machinery, automatic doors, elevators, and the automotive and building sectors.
A proximity sensor is a sensor able to detect the presence of nearby objects without any physical contact. It detects An Object When The Object Approaches Within The Detection Range And Boundary Of The Sensor. Proximity Sensor Includes All The Sensor That Perform Non-Contact Detection In Comparison To Sensors Such As Limit Switch, That Detect The Object By Physically Contacting Them. It is a sensor able to detect the presence of nearby objects without any physical contact
Proximity Sensor Detects An Object When The Object Approaches Within The Detection Range And Boundary Of The Sensor. Proximity Sensor Includes All The Sensor That Perform Non Contact Detection In Comparison To Sensors Such As Limit Switch, That Detect The Object By Physically Contacting Them. It is a sensor able to detect the presence of nearby objects without any physical contact. A proximity sensor often emits an electromagnetic field or a beam of electromagnetic radiation (infrared, for instance), and looks for changes in the field or return signal. The object being sensed is often referred to as the proximity sensor's target. Different proximity sensor targets demand different sensors. For example, a capacitive or photoelectric sensor might be suitable for a plastic target; an inductive proximity sensor always requires a metal target. The maximum distance that this sensor can detect is defined "nominal range". Some sensors have adjustments of the nominal range or means to report a graduated detection distance. Proximity sensors can have a high reliability and long functional life because of the absence of mechanical parts and lack of physical contact between sensor and the sensed object. Proximity sensors are commonly used on smart phones to detect (and skip) accidental touch screen taps when held to the ear during a call.[1] They are also used in machine vibration monitoring to measure the variation in distance between a shaft and its support bearing. This is common in large steam turbines, compressors, and motors that use sleeve-type bearings. A change in the sensor's electric or magnetic field can also be used to determine proximity.
LINEAR POTENTIOMETER Potentiometers are electrical devices which are a form of variable resistance.
It consists of a sliding contact which moves over the length of a resistance element. This sliding contact connects to a plunger, which links to the object whose displacement is to be measured.
Referring to the electrical circuit shown here, An input voltage Xt is applied across the whole resistance element, at points A and C. The output voltage, Xi , is measured between the sliding contact at point B and the end of the resistance element at point C. A linear relationship exists between the input voltage Xt, output voltage Xi and the distance BC.
ANGULAR POTENTIOMETER Rotary or angular potentiometers measure angular displacement .
A proximity sensor is a sensor able to detect the presence of nearby objects without any physical contact. It detects An Object When The Object Approaches Within The Detection Range And Boundary Of The Sensor. Proximity Sensor Includes All The Sensor That Perform Non-Contact Detection In Comparison To Sensors Such As Limit Switch, That Detect The Object By Physically Contacting Them. It is a sensor able to detect the presence of nearby objects without any physical contact
Proximity Sensor Detects An Object When The Object Approaches Within The Detection Range And Boundary Of The Sensor. Proximity Sensor Includes All The Sensor That Perform Non Contact Detection In Comparison To Sensors Such As Limit Switch, That Detect The Object By Physically Contacting Them. It is a sensor able to detect the presence of nearby objects without any physical contact. A proximity sensor often emits an electromagnetic field or a beam of electromagnetic radiation (infrared, for instance), and looks for changes in the field or return signal. The object being sensed is often referred to as the proximity sensor's target. Different proximity sensor targets demand different sensors. For example, a capacitive or photoelectric sensor might be suitable for a plastic target; an inductive proximity sensor always requires a metal target. The maximum distance that this sensor can detect is defined "nominal range". Some sensors have adjustments of the nominal range or means to report a graduated detection distance. Proximity sensors can have a high reliability and long functional life because of the absence of mechanical parts and lack of physical contact between sensor and the sensed object. Proximity sensors are commonly used on smart phones to detect (and skip) accidental touch screen taps when held to the ear during a call.[1] They are also used in machine vibration monitoring to measure the variation in distance between a shaft and its support bearing. This is common in large steam turbines, compressors, and motors that use sleeve-type bearings. A change in the sensor's electric or magnetic field can also be used to determine proximity.
LINEAR POTENTIOMETER Potentiometers are electrical devices which are a form of variable resistance.
It consists of a sliding contact which moves over the length of a resistance element. This sliding contact connects to a plunger, which links to the object whose displacement is to be measured.
Referring to the electrical circuit shown here, An input voltage Xt is applied across the whole resistance element, at points A and C. The output voltage, Xi , is measured between the sliding contact at point B and the end of the resistance element at point C. A linear relationship exists between the input voltage Xt, output voltage Xi and the distance BC.
ANGULAR POTENTIOMETER Rotary or angular potentiometers measure angular displacement .
this is a slide based on proximity sensors, its types,and its application.
A proximity sensor is a sensor able to detect the presence of nearby objects without any physical contact.
A proximity sensor often emits an electromagnetic field or a beam of electromagnetic radiation (infrared, for instance), and looks for changes in the field or return signal. The object being sensed is often referred to as the proximity sensor's target. Different proximity sensor targets demand different sensors. For example, a capacitive proximity sensor or photoelectric sensor might be suitable for a plastic target; an inductive proximity sensor always requires a metal target.[citation needed]
Proximity sensors can have a high reliability and long functional life because of the absence of mechanical parts and lack of physical contact between the sensor and the sensed object.
Proximity sensors are also used in machine vibration monitoring to measure the variation in distance between a shaft and its support bearing. This is common in large steam turbines, compressors, and motors that use sleeve-type bearings.
Proximity sensors are commonly used on mobile devices. When the target is within nominal range, the device lock screen user interface will appear, thus emerging from what is known as sleep mode. Once the device has awoken from sleep mode, if the proximity sensor's target is still for an extended period of time, the sensor will then ignore it, and the device will eventually revert into sleep mode. For example, during a telephone call, proximity sensors play a role in detecting (and skipping) accidental touchscreen taps when mobiles are held to the ear.[1]
Proximity sensors can be used to recognise air gestures and hover-manipulations. An array of proximity sensing elements can replace vision-camera or depth camera based solutions for the hand gesture detection.
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It gives few ideas to learn about sensors which are as normally used as electrical & electronics applications.......
This article provides an introduction to the fundamental of Sensors and Transducers. It illustrates the different classifications of sensors and transducers. Explains capacitive, resistive and inductive transducers in brief. Also shows the examples under these types of transducers.
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this is a slide based on proximity sensors, its types,and its application.
A proximity sensor is a sensor able to detect the presence of nearby objects without any physical contact.
A proximity sensor often emits an electromagnetic field or a beam of electromagnetic radiation (infrared, for instance), and looks for changes in the field or return signal. The object being sensed is often referred to as the proximity sensor's target. Different proximity sensor targets demand different sensors. For example, a capacitive proximity sensor or photoelectric sensor might be suitable for a plastic target; an inductive proximity sensor always requires a metal target.[citation needed]
Proximity sensors can have a high reliability and long functional life because of the absence of mechanical parts and lack of physical contact between the sensor and the sensed object.
Proximity sensors are also used in machine vibration monitoring to measure the variation in distance between a shaft and its support bearing. This is common in large steam turbines, compressors, and motors that use sleeve-type bearings.
Proximity sensors are commonly used on mobile devices. When the target is within nominal range, the device lock screen user interface will appear, thus emerging from what is known as sleep mode. Once the device has awoken from sleep mode, if the proximity sensor's target is still for an extended period of time, the sensor will then ignore it, and the device will eventually revert into sleep mode. For example, during a telephone call, proximity sensors play a role in detecting (and skipping) accidental touchscreen taps when mobiles are held to the ear.[1]
Proximity sensors can be used to recognise air gestures and hover-manipulations. An array of proximity sensing elements can replace vision-camera or depth camera based solutions for the hand gesture detection.
This Presentation provides some basics of Sensors Technology.........
It gives few ideas to learn about sensors which are as normally used as electrical & electronics applications.......
This article provides an introduction to the fundamental of Sensors and Transducers. It illustrates the different classifications of sensors and transducers. Explains capacitive, resistive and inductive transducers in brief. Also shows the examples under these types of transducers.
In this slide there is all about the digital transducer and its types.Its is very helpful in making short notes of transducer. There is a simple description.
It is ppt on Forced sensor which describes the introduction to sensor and few definition of forced sensor. Then it explains the construction and how it is used. And in the end it explains the few application of Forced sensor in world.
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About
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
• Remote control: Parallel or serial interface.
• Compatible with MAFI CCR system.
• Compatible with IDM8000 CCR.
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
• Easy in configuration using DIP switches.
Technical Specifications
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
Key Features
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
• Remote control: Parallel or serial interface
• Compatible with MAFI CCR system
• Copatiable with IDM8000 CCR
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
Application
• Remote control: Parallel or serial interface.
• Compatible with MAFI CCR system.
• Compatible with IDM8000 CCR.
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
• Easy in configuration using DIP switches.
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3. A Proximity Sensor Detects An Object When The
Object Approaches Within The Detection Range And
Boundary Of The Sensor.
Proximity Sensor Includes All The Sensor That Perform
Non Contact Detection In Comparison To Sensors Such
As Limit Switch ,That Detect The Object By Physically
Contacting Them.
5. An Inductive proximity sensor is an electronic
proximity sensor , which detect metallic object
without touching them.
Their operating principle is based on a coil and
high frequency oscillator that creates a field in
the close surrounding of the sensing surface .
The operating distance of the sensor depends on
the coil’s size as well as the target ‘s shape, size
and material
6. The Main Components Of The Inductive Proximity
Sensor Are. Coil, Oscillator, Detector And The Output
Circuit
The Operating Distance Of The Sensor Depends On
The Actuator's Shape And Size And Is Strictly Linked
To The Nature Of The Material
The Coil Generates The High Frequency Magnetic
Field In Front Of The Face. When The Metallic Target
Comes In This Magnetic Field It Absorbs Some Of The
Energy
7. Hence the oscillator field is affected. The rise or
fall of such oscillation is identified by a threshold
circuit..that changes the output of the sensor.
8. ADVANTAGES
they are very accurate compared to other
technologies.
Have high switching rate.
Can work in harsh environmental conditions.
DISADVANTAGES
It can detect only metallic target.
Operating range may be limited.
9.
10. Capacitive Sensor Are Used For Non Contact
Detection Of Metallic Object And Non Metallic
Object(liquid, Plastic, Wooden Material Etc.)
Capacitive Proximity Sensors Use The Variation Of
Capacitance Between The Sensor And Object Being
Detected.
Capacitance Methods Are Very Sensitive ,
Distance Down To One Micro Inch Can Be Measured.
11. The Main Components Of The Capacitive Proximity
Sensor Are Plate, Oscillator, Threshold Detector And The
Output Circuit.
The Plate Inside The Sensor Acts As One Plate Of The
Capacitor And The Target Acts As Another Plate And The
Air Acts As The Dielectric Between The Plates.
The Capacitive Sensor Can Detect Any Targets Whose
Dielectric Constant Is More Than Air
12. Cont..
As the object comes close to the plate of the
capacitor the capacitance increases and as the
object moves away the capacitance decreases
an electronic circuit inside the sensor begins to
oscillate. The rise or the fall of such oscillation is
identified by a threshold circuit and based on
that output switches.
13. ADVANTAGES
It can detect both metallic and non metallic
targets.
Good stability
High Speed
Capacitive sensors are good in terms of power
usage
Low cost
DISADVANTAGES
They are affected by temperature and humidity
Difficulties in designing
Capacitive proximity sensors are not as accurate
compare to inductive sensors.
14.
15. The Proximity Of The Object Is Detected By The Action
Of The Travelling Light Move.
These Sensors Use Light Sensitive Elements To Detect
Objects And Are Made Up Of An Transmitter (Light
Source) And A Receiver
The Object Within The Range Of The Sensor Can Detect
The Presence.
16. The Light Emitted By The Transmitter Focuses On The
Object Which Reflects To Be Received By The Receiver
Photo Diode.
The Reflected Waves Travel Back And Received By The
Solid State Photo Diode, Through The Receiver Lens.
17. ADVANTAGES
They Are Useful And Can Help Many Security
Problems.
DISADVANTGES
They Can Easily Be Set Off And Cause Problems.
They Are Expensive Than Inductive And Capacitive
Proximity Sensor
APPLICATION
Optical proximity sensors mostly apply in
automobile/process eng. For distance
measurement, level sensing etc.
18. Ultrasonic Sensor Are Some Type Used In Place
Of Optical Sensors . Instead Of Using An Light
Beam , A High Frequency Sound Wave Is Used.
This Sound Wave Is Above Normal Hearing
Frequencies And Are Called Ultrasonic
Frequencies Around 40 KHz Are Common.
The Ultrasonic Sensor Can Measure Distances In
Centimeters And Inches. It Provides Good
Readings In Sensing Large-sized Objects With
Hard Surfaces.
19. The ultrasonic sensor sends out sound and receives
it back using the receiver. Together, the ultrasonic
sensor's sender and receiver look like a pair of eyes,
but it is not a sight sensor. Instead, those "eyes" are
really more like a speaker and a microphone (a sound
sensor).
20.
21. CONT.
The Emitter And Detector Are 2 Separate Units. The
Emitter Emits The Light Which Is Detected By The
Detector. A Target Is Detected When It Passes In-between
The Emitter And Detector.
22. ADVANTAGES
Ultrasonic proximity sensors are not affected
by atmospheric dust, snow, rain..etc
Can work in adverse conditions
Sensing distance is more compared to
inductive or capacitive proximity sensors
DISADVANTAGES
Ultrasonic sensors Has More Difficulties
Reading Reflections From Soft, Curved, Thin
Or Small Objects.
23. The global market for these proximity sensors is
expected to grow at a steady rate. Major
industries using proximity sensors are machine
tools, woodworking machines, packaging
machines and other types of machinery.
Further applications of are automatic door units
such as garage doors or doors inside buildings,
elevator doors or doors inside railway coaches.
The building and automotive sector are further
industries using high volumes of proximity
sensors.