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motion sensing technology
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Motion sensing and detection

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This ppt contains a detailed analysis about the Motion sensing and Detecting methods.
It Further draws the attention of Different types of Motion Sensing.
It also adds light to the upcoming technologies using the motion sensing methods..


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Motion sensing and detection

  1. 1. Motion Sensing And Detection Prepared By:- Nirav Soni (120570107018) 29 October 2014 Guided By:- Professor Sahista Machchhar Computer Dept, MEFGI-R
  2. 2. Overview • What is Motion?? • What is Sensing?? • Motion Sensing. • Types of Motion Sensing. • Application of Motion Sensing. • Motion Controller. • Some Motion Sensing Device. 29 October 2014
  3. 3. Motion • In physics, motion is a change in position of an object with respect to time and its reference point. • Motion is typically described in terms of displacement, direction, velocity, acceleration and time. • Motion is the variation of a body with respect to time. 29 October 2014
  4. 4. Sensor • A sense is a physiological capacity of organisms that provides data for perception. • A sensor is a device which receives and responds to a signal. • 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 (electronic) instrument. 29 October 2014
  5. 5. Motion sensors • The term ‘Motion sensors’ can be used to refer to any kind of sensing system which is used to detect motion; motion of any object or motion of human beings. • Motion sensors also called as motion detector. • Motion sensors are commonly used in security systems as triggers for automatic lights or remote alarms and similar applications. 29 October 2014
  6. 6. Types of Motion sensors • The way in which a motion sensor works typically depends on the type of sensor being used, which often depends on the device that uses the sensor. • There are two basic types of motion sensors: 1). Active Sensors 2). Passive Sensors 29 October 2014
  7. 7. Active Sensors • Active sensors emit a signal, typically an burst of (light, microwaves or sound) waves which is reflected by the surroundings. • The reflected signal is received by the sensor and takes necessary action. • When something moves within the area of an active motion sensor, the change in signal that is reflected to the sensor activates the system. 29 October 2014
  8. 8. Continued.. • The active sensor is one of the most common and reliable sensors used in a security system. • Advantages for active sensors include the ability to obtain measurements anytime, regardless of the time of day or season. • Some examples of active sensors are:- 1. RADAR. 2. LiDAR. 29 October 2014
  9. 9. Passive Sensors • Passive Sensors are a type of motion sensor that do not emit a signal, but instead detect infrared radiation around the sensor. • As this sensor detects temperature differences, it is well suited to detecting the motion of people by their body temperature. • When a person or animal moves through the area, heat from the movement is detected by the sensor, which then activates the system to which it is connected. 29 October 2014
  10. 10. Continued.. • Turn lights on when a person is present in a room. • Remote Sensing 29 October 2014
  11. 11. Types of Motion Sensing • Basically, there are many types of motion sensing, but the major ones are as mentioned below:- 1. Passive Infrared Motion Sensing. 2. Ultrasonic Motion Sensing. 3. Microwave Motion Sensing. 29 October 2014
  12. 12. Passive Infrared Motion Sensing • PIR sensor detects a human being moving around within approximately 10m from the sensor. This is an average value, as the actual detection range is between 5m and 12m. • They are sensitive to person’s skin temperature through emitted blackbody radiation on at mid infrared wavelengths, in contrast to the objects at room temperature. 29 October 2014
  13. 13. Continued.. • Infrared sensors are characterized by high sensitivity, low cost and are widely used. • An infrared motion detector can also be set to only pick up on certain levels of heat, making it possible to ignore small animals. • Example:- 1. Automatic Door Opening System. 2. Proximity Sensors. 3. Automatic Counting Mechanisms. 29 October 2014
  14. 14. Ultrasonic motion sensing • Ultrasonic motion detectors use sound waves to detect motion. If movement is detected, the sound wave pattern is disrupted and alarm is signaled. • It senses motion by analyzing sound waves in its environment. • These frequencies are generally inaudible to humans and most animals and do not pass through objects 29 October 2014
  15. 15. Continued.. • Active motion sensors generate sound waves in the ultrasonic frequency range, typically around 30 to 50 kilohertz (kHz). • When no objects are moving in the area, the pattern of sound and the time it takes to bounce back remain the same. • If something moves, the detector senses that the level or phase of the returning sound waves has shifted slightly. • Example:- 1. Ultrasound is also used in medical applications for imaging and surgery 2. Sonar. 29 October 2014
  16. 16. Microwave motion sensing • Microwave motion sensor systems send out microwaves that bounce off an object and back to the sensor. • The sensor then reads the frequency of the returning waves. • If an object is moving, the sensor receives different microwaves than the ones it sent out, signifying movement and setting off the alarm. 29 October 2014
  17. 17. Continued.. • These types of motion sensor systems cover a larger area than infrared sensors, they are capable of penetrating walls. • They are more reliable over longer distances. • Their radiation is unhealthy for living organisms. • Despite this, they are the least popular motion sensor system on the market because of their cost. 29 October 2014
  18. 18. Accelerometers • Accelerometers measure linear acceleration and tilt angle. • Single and multi-axis accelerometers detect the combined magnitude and direction of linear, rotational and gravitational acceleration. They can be used to provide limited motion sensing functionality. • An accelerometer measures proper acceleration, which is the acceleration it experiences relative to freefall and is the acceleration felt by people and objects. 29 October 2014
  19. 19. Continued… • Examples:- 1. Accelerometers are used for simple motion sensing applications such as changing the screen of a mobile device from portrait to landscape orientation. 2. Accelerometers can be used to measure vehicle acceleration. 3. Notebook computers equipped with accelerometers can contribute to the Quake- Catcher Network (QCN), a BOINC project aimed at scientific research of earthquakes. 4. Accelerometers are used to measure the motion and vibration of a structure that is exposed to dynamic loads. 29 October 2014
  20. 20. Continued… 5.Modern electronic accelerometers are used in remote sensing devices intended for the monitoring of active volcanoes to detect the motion of magma. 6.Camcorders use accelerometers for image stabilization. Still cameras use accelerometers for anti-blur capturing. 7.Orientation sensing. 29 October 2014
  21. 21. Application • The Motion Sensing has been precisely and accurately used in the following devices:- 1. Leap Motion Controller. 2. Kinect 360. 3. Play Station Move Controller. 4. Razer Hydra. 5. Wired glove. 29 October 2014
  22. 22. Leap Motion Controller • The Leap Motion controller is a small USB peripheral device which is designed to be placed on a physical desktop, facing upward. • Using two monochromatic IR cameras and three infrared LEDs, the device observes a roughly hemispherical area, to a distance of about 1 meter (3 feet). 29 October 2014 • The LEDs generate a 3D pattern of dots of IR light and the cameras generate almost 300 frames per second of reflected data, which is then sent through a USB cable to the host computer, where it is analyzed by the Leap Motion controller software
  23. 23. Kinect 29 October 2014 Kinect (codenamed in development as Project Natal) is a line of motion sensing input devices by Microsoft for Xbox 360 and Xbox One video game consoles and Windows PCs It enables users to control and interact with their console/computer without the need for a game controller, through a natural user interface using gestures and spoken commands
  24. 24. Play Station Move • The PlayStation Move motion controller features an orb at the head which can glow in any of a full range of colors using RGB light-emitting diodes (LEDs) • Based on the colors in the user environment captured by the camera, the system dynamically selects an orb color that can be distinguished from the rest of the scene. • The colored light serves as an active marker, the position of which can be tracked along the image plane by the camera. 29 October 2014
  25. 25. Wired glove • A wired glove is an input device for human– computer interaction worn like a glove. • Various sensor technologies are used to capture physical data such as bending of fingers. • Often a motion tracker, such as a magnetic tracking device or inertial tracking device, is attached to capture the global position/rotation data of the glove. 29 October 2014
  26. 26. References • • • er • sors • with-working-description-and-its-applications/ • 29 October 2014
  27. 27. Thank you 29 October 2014

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This ppt contains a detailed analysis about the Motion sensing and Detecting methods. It Further draws the attention of Different types of Motion Sensing. It also adds light to the upcoming technologies using the motion sensing methods.. BETTER DOWNLOAD THE PPT FOR BETTER UNDERSTANDING AND CLEAR VISUAL APPERANCE FOR THE PRESENTATION..


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