Introduction
PRECISION MANUFACTURING
AND ASSEMBLY
A piezoelectric sensor consists of up
to 22 parts. Some of them are just
a few tenths of a millimeter in size.
This requires production tolerances
similar to those for optical parts and
assembly techniques like those used
for mechanical watches. The core of
all piezoelectric sensors is a set of
piezoelectric crystals. Uncooled and
one type cooled sensors from AVL
use the patented crystal material
GaPO4 which is produced only at the
AVL headquarters in Austria.
RESEARCH AND
DEVELOPMENT
To achieve the desired precision the
design of every single part requires
high-tech know-how from the development
department along with
innovative computer aided modeling
algorithms. One example of the
unique methods AVL practices is
the use of trimmed piezo elements
together with the Double Shell™
design of the sensor housing. This
helps to reduce any negative influences
on the signal to a non detectable
level and ensures optimum
results.
9