Biomedical Engineering Reference
In-Depth Information
Overview of the measurement systems: what are sensors, processors, amplifi -
ers, receivers, etc.
The fundamental principles of each instrument are:
INPUT
and
OUTPUT
. The Part
of Instrument that detects the input is called
the sensor
[
1
-
3
]. The sensor
converts
the input parameters into the
signal
, usually
electrical voltage
that allows for the
reading of the signal. Many types of sensors use different mechanisms to convert an
input variable into a measurable quantity. The input signal can be after detection
modifi ed
by a
processor
, and that processing may include:
The amplifi cation of the signal
Filtering to remove unwanted information
Comparison to signal to from previous measurement to control the signal
[
2
]
Receiver
is the device that represents an
interpretable message
to humans, and
signals can be (after processing) displayed, stored or communicated
via
that
device [
1
].
Therefore, we can already understand that the use of computers in bioengineering
in general and in this fi eld especially, is of essential signifi cance (Fig.
16.1
).
Fig. 16.1
Computer
illustrates what is written and
many other things
