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Technical background
The philosophy behind NeuLog's plug and play
technology is based on each sensor's ability to store its
own data due to an internal flash memory chip and
micro-controller in each plastic NeuLog body. This
technology allows the sensor to collect and then store
the digital data in the correct scientific units (for
o
o
example:
C,
F, Lux, %, ppm).
The sensor is pre-calibrated at the factory. The built-in
software in the logger can be upgraded for free at any
time using the provided firmware update.
The respiration sensor uses the piezoresistive effect. The
transducer is based on silicon between metal foils that
changes its resistance according to pressure. One side
of it is at complete vacuum that enables to measure the
absolute pressure on its other side.
This transducer is built as a strain gauge with
Wheatstone bridge circuit so its output is a voltage that
depends on its absolute pressure.
When the user inhales, a pressure is applied directly to
the respiration monitor belt's air bladder and it is
detected by the internal sensing unit and converted to a
voltage.
The voltage reading is easily converted into arbitrary
units and the pressure changes to monitor respiration
rate.
V2018.01
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