1: You must place a copy of your abstract in the front of your
2: Your abstract must by PRINTED IN INK or TYPED.
Title: The Automatic Greenhouse
the purpose of your project?
of the project is to construct an electronic control system that facilitates
the regulation of a greenhouse environment.
brief summary of the procedure that you followed:
system is a network of linked mini-computers that integrate the diversity
of both information and functions necessary to operate a greenhouse.
Each mini-computer handles a different category of information or
function. For example, one computer deals with the water sprayer,
another deals with humidity levels and another deals with temperature
control. This series of computers is linked to a central computer,
that receives messages from the mini-computers and sends back commands
as necessary. The system operates at a speed of 4800 baud. Because
each mini-computer is a dedicated system, it can be used to analyze
and interpret information at the source, before information is transmitted
to the central computer. This has the effect of diminishing the workload
for the central computer.
is based on information "tokens". Only one mini-computer
can transmit information at any one time, when it has received the
information token from the central computer. The system cannot transmit
information any faster than 4800 baud.
state the results:
the system functions well in spite of its relatively slow speed. But
as the tasks are distributed among several mini-computers, the amount
of information that has to be transmitted at any one time is never
very great. The speed of the system is adequate for this application.
advantage of the system is its capacity for expansion. More mini-computers
handling more functions can be added with very little modification.
This gives the user a great deal of flexibility. The disadvantage
is that the system's costs are high at start-up. But each time a peripheral
computer is added, the cost relative to the performance is lowered.