Micromachines,
Journal Year:
2024,
Volume and Issue:
15(11), P. 1395 - 1395
Published: Nov. 18, 2024
The
measurement
of
downhole
drilling
motor
rotational
speed
is
crucial
for
optimizing
operations,
improving
work
efficiency,
and
preventing
equipment
failures.
However,
traditional
sensors
suffer
from
power
supply
limitations,
which
can
increase
costs.
To
address
this
issue,
study
presents
a
novel
multifunctional
sensor
based
on
triboelectric
nanogenerator
(TENG)
technology,
enabling
the
self-powered
speed,
direction,
angle.
Our
experimental
results
demonstrate
that
operates
stably
within
temperature
range
0
to
150
°C
humidity
90%.
It
achieves
with
an
accuracy
less
than
2.5%
error
1000
rpm,
angular
resolution
60
degrees
2%
360
degrees,
direction
measurement.
Furthermore,
exhibits
functionality,
achieving
maximum
output
29.1
μW
when
external
load
10
MΩ.
Compared
conventional
sensors,
possesses
unique
advantage
integrating
angle,
while
simultaneously
harnessing
working
conditions
self-power
generation.
These
characteristics
make
it
highly
suitable
practical
environments.
Applied Sciences,
Journal Year:
2025,
Volume and Issue:
15(10), P. 5637 - 5637
Published: May 18, 2025
In
recent
years,
technologies
in
the
field
of
gait
monitoring,
such
as
parameter
analysis,
health
and
medical
diagnosis,
have
become
increasingly
mature.
Gait
monitoring
technology
has
emerged
an
effective
means
for
disease
prevention
diagnosis.
Triboelectric
nanogenerator
not
only
overcomes
limitations
relying
on
external
power
sources
frequent
battery
replacements
but
also
offers
advantages
low
cost,
lightweight,
a
wide
range
material
options,
ease
manufacturing.
This
review
introduces
common
working
modes
triboelectric
nanogenerators
summarizes
advances
self-powered
applications
(e.g.,
fall
detection,
rehabilitation
assessment,
identity
recognition),
highlights
persistent
challenges
wearability,
washability
fabric-based
devices,
reliability,
system
integration,
miniaturization,
along
with
proposed
solutions.
Polyimide-based
triboelectric
nanogenerators
(TENGs)
capable
of
energy
harvesting
in
harsh
environments
(high
temperature
and
high
humidity)
have
been
extensively
studied.
However,
most
polyimide-based
TENGs
the
disadvantages
poor
air
permeability
softness.
In
this
study,
a
core–shell
yarn
with
good
permeability,
softness,
electric
output
performance
was
successfully
prepared
by
conjugate
electrospinning.
FEP-doped
FPI
nickel-plated
aramid
were
employed
as
shell
core
materials,
respectively.
Due
to
unique
hierarchical
porous
structure
fluorinated
functional
group
modification,
yarns
exhibit
excellent
(maximum
open-circuit
voltage
is
22.7
V
per
length
10
cm)
compared
traditional
polyimide
yarns.
The
textile
woven
has
high-temperature
resistance,
antifouling,
waterproof,
self-cleaning
performance,
still
maintains
an
about
80%
under
99%
relative
humidity.
Moreover,
textile-based
TENG
no
significant
attenuation
after
10,000
cycles,
showing
stability
durability.
Finally,
based
on
intelligent
fire
suit
designed,
which
can
be
used
for
movement
position
monitoring
firefighters
high-humidity
environments.
This
study
provides
promising
solution
development
self-powered
sensors
status
