Sensors & applications , commenly used sensors
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The document provides an overview of sensors, specifically focusing on their applications in smartphones. It details various types of sensors, such as accelerometers, gyroscopes, and infrared proximity sensors, along with their functionalities and uses. It also highlights the significance of these sensors in detecting motion, controlling screen orientation, and preventing accidental touch inputs.
Sensors & applications , commenly used sensors
- 1. SENSORS AND THEIR APPLICATIONS PRESENTED BY: PRESENTED TO: KAMAL JEET K SHRINAVASRAO B.TECH (ECE) DEPT. OF ECE
- 2. CONTENTS Introduction about Sensors Different types of Sensors in Smartphones IR based proximity Sensor Application of Proximity sensor
- 3. Introduction about sensors A sensor is a device that detects and responds to some type of input from the physical environment. The specific input could be light, heat, motion, moisture, pressure or any other environmental phenomena. The output is generally a signal that is converted to human readable display at the sensor location or transmitted electronically over a network for reading or further processing.
- 4. Sensors in Smartphones Accelerometer The accelerometer is a built-in electronic component that measures tilt and motion. It measures linear acceleration of movement. Capable of detecting rotation and motion gestures such as swinging & shaking. The most common use for it is to activate auto screen rotation on smartphones when the user changes their orientation. Another modern application for the accelerometer is to control the mobile device music with gestures & also enriching the gaming controls.
- 5. Gyroscope The gyroscope, or gyro for short is and advance version of accelerometer most commonly used in smartphones. It is sensor that can provide orientation information as well, but with precision, android’s photo sphere camera feature can tell how much a phone has been rotated and in which orientation. Gyroscope measures the angular rotational velocity & measures rate of change of different things. When we combine the 3-axis accelerometer with 3-axis gyro, we get an output that is both clean and responsive.
- 6. IR based proximity sensor The proximity sensors commonly found in smartphones these days use (IR) Infrared radiation which is invisible to the naked human eye. An IR LED emits IR radiation which bounces off any nearby surface. The reflected rays are detected by an IR receiver sitting next to the emitter.
- 7. Based on the distance between the obstacle and the sensor, the intensity of light falling on the receiver varies. Hence, a high intensity light reflected back implies there is an obstacle or a surface nearby. In smartphones it is used to turn off the touch screen while it is closer to your face-so that you don’t select functions accidentally.
- 8. Applications Detecting Dynamic Motion Position Measurement Touchscreen & Touchpads Most commonly found in smartphones Parking sensors, system mounted on car bumpers that sense distance to nearby cars for parking
- 9. References: en.Wikipedia.org/wiki/Proximity-sensors www.g9toengineering.com www.quora.com technical guruji.in