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Listening Recognition Based Handicapped Wheel Chair With Voice Play
Student Team/ Author : Himanshu Mittal Kirandeep kaur Kamaldeep Kaur Jaswinder Singh
Guide By : Sudhakar Pandey
Degree : Electronics and Communication
College : DBEC
In this project we will use Speech recognition module HM 2007. With the help of this DSP chip we can store our voice tags on different memory loacations of chip and can check the location by our voice tag speaking. In this project we will make listening robot. It will listen our voice. When we will say ’go’- will move forward. When back it will move back. Autopath robot is our major this project robot will automatically move forward when it will detect any wall then it will change its path. For one direction robo will move forward. For second sensor robo will move backward. For third sensor it will move right and for fourth sensor it will move left. For this we will use Microcontroller to control robo motors. We will use stepper or servo motors for moving purpose. In this project we use ic 89c2051 microcontroller as a main processor. IC 89c2051 is a 20 pin microcontroller. This ic is a 20 pin version of 40 pin main atmel ic 89c51 microcontroller. We program this ic with the help of computer. Software is written in the assembley language and then transfer i
About Accelerometer- An accelerometer is a device that measures proper acceleration, also called the four-acceleration. This proper acceleration is associated with the weight of a test mass. For example, an accelerometer on a rocket far from any gravitational influences (assume gravitation is zero) that is accelerating through space due to the force from its engine, will measure the rate of change of the velocity of the rocket relative to any inertial frame of reference, because such changes require application of a (rocket) force that can be felt (as weight), for any mass. However, the proper acceleration measured by an accelerometer is not necessarily the coordinate acceleration (rate of change of velocity), when gravity becomes involved. Gravitation may make these types of acceleration differ. For an example where these types of acceleration differ, an accelerometer will measure a value of g in the upward direction when remaining stationary on the ground, because masses on earth have weight m*g. Such weight is transmitted from the push of the ground, and is not directly caused by gravity, but rather by the mechanical force from the ground, in the same way as the push of the engine in the rocket example. However, there is no change in velocity in this example, as the push from the ground counteracts the acceleration of gravity, which is not felt. By contrast, an accelerometer in gravitational free fall toward the center of the Earth will measure a value of zero acceleration because, even though its velocity is increasing, it is at rest in a frame of reference in which objects are weightless. Like the human body, therefore, an accelerometer is not sensitive to the "acceleration of gravity" per se, and will read zero whenever gravitation provides the only acceleration that acts on the device (or the only "force" on the device). Accelerometers read "zero" on all inertial paths, including free-falls, orbits, and gravitationally directed motion. An accelerometer thus measures all accelerations, except those accelerations due to gravity. An accelerometer measures weight per unit of (test) mass, a quantity with dimensions of acceleration that is sometimes known as specific force, or g-force (although it is not a force). Another way of stating this is that by measuring weight, an accelerometer measures the acceleration of the free-fall reference frame (inertial reference frame) relative to itself (the accelerometer). Equivalently, accelerometers measure their own acceleration relative to free-fall at their location (since accelerations relative to free-fall must be provided by forces that are not gravitational forces). All of these measurable accelerations are not the ordinary acceleration of Newton (in three dimensions), but rather four-acceleration, which is acceleration away from a geodesic path in four-dimensional space-time. Most accelerometers do not display the value they measure, but supply it to other devices. Real accelerometers also have practical limitations in how quickly they respond to changes in acceleration, and cannot respond to changes above a certain frequency of change. Single- and multi-axis models of accelerometer are available to detect magnitude and direction of the proper acceleration (or g-force), as a vector quantity, and can be used to sense orientation (because direction of weight changes), coordinate acceleration (so long as it produces g-force or a change in g-force), vibration, shock, and falling in a resistive medium (a case where the proper acceleration changes, since it starts at zero, then increases). Micromachined accelerometers are increasingly present in portable electronic devices and video game controllers, to detect the position of the device or provide for game input.

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