Page 344 - Mechatronics with Experiments
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P. S.
Physical system
123.456 Amplifier Sensor
Display unit Measured
variable
FIGURE 6.1: The components of a sensor: sensor head, amplifier, power supply, display or
processing unit.
Rotational position
sensor
Pressure sensor
Temperature sensor
in the engine
Engine speed sensor
Rotational position sensor
FIGURE 6.2: Examples of various types of sensors used on construction equipment. There are
more sensors on modern construction equipment. Only a small set of examples are shown in
this figure. Reprinted Courtesy of Caterpillar Inc.
(a) (b) (c)
FIGURE 6.3: The definitions of accuracy and repeatability: (a) accurate, (b) repeatable, but not
accurate, (c) not repeatable, not accurate. Resolution is the smallest positional change the
arrow can be placed on the target (imagine that the target has many small closely spaced holes
and the arrow can only go into one of these holes).
