What is meant by projection in engineering drawing?
The figure or view formed by joining, in correct sequence, the points at which these lines meet the plane is called the Projection of the object. The lines or rays drawn from the object to the plane are called Projectors. The transparent plane on which the projections are drawn is known as Plane of Projection.
What are the types of projection drawings?
Projection Methods Used In Mechanical Drawing
- Orthographic Projection. Orthographic projection shows a 3D object in two dimensions so that you can see three views: the front view, side view and top view.
- Axonometric Projection.
- Oblique Projection.
- Perspective Projection.
What is ment by projection?
: an estimate of what might happen in the future based on what is happening now. : something that sticks out from a surface. : the act or process of causing a picture, movie, etc., to appear on a surface.
What is projection and projector?
A projector or image projector is an optical device that projects an image (or moving images) onto a surface, commonly a projection screen. Most projectors create an image by shining a light through a small transparent lens, but some newer types of projectors can project the image directly, by using lasers.
How do you draw a projection?
Steps used to create an orthographic projection
- Choose a front view.
- Decide how many views are needed to completely describe the object.
- Draw the visible features of the front view.
- Draw projectors off of the front view horizontally and vertically in order to create the boundaries for the top and right side views.
Why is projection necessary?
The need for a map projection mainly arises to have a detailed study of a region, which is not possible to do from a globe. from a globe is nearly impossible because the globe is not a developable surface. In map projection we try to represent a good model of any part of the earth in its true shape and dimension.
How does a projection screen work?
In an LCD TV projector, a very bright light shines through a small LCD screen into a lens, which throws a hugely magnified image of the screen onto the wall. The technology is sometimes called LCLV (liquid crystal light valve).
Which is the best definition of the word projection?
dictionary thesaurus. noun. 1 : projection of a single view of an object (such as a view of the front) onto a drawing surface in which the lines of projection are perpendicular to the drawing surface.
Can a drawing be used as a projection?
It is particularly suitable for representing interior designs, such as kitchen layouts. Planning drawings can also be effective represented as axonometric projections, showing the relationships between buildings and topography .
How is the front plane of projection seen?
The front plane of projection is seen to be between the observer and the object. The images below show the projection of the object on a 3D box surrounding the object. The box is then gradually unfolded to then present a series of 2D views in the 3rd Angle projection as viewed by the observer.
Which is the best definition of third angle projection?
Third Angle projection is a method of orthographic projection which is a technique in portraying a 3D design using a series of 2D views. The Third Angle Projection or First Angle Projection, different countries and regions typically use one method or the other although this can depend on a company’s customer.