Nowadays, structural health monitoring (SHM)
presents a hot topic in vast areas of industries, to monitor structural changes
from smaller devices to civil engineering constructions. The core of SHM is to
predict the fatal failure of the monitored object. One of the most influential
effects is mechanical stresses applied on the material in the form of pressure,
torque, or tension. Therefore, for different applications, a suitable sensor
needs to be selected.
Market offers wide range of solutions including strain gauges, piezoelectric
sensors, MEMS, optical sensors, or MicroWire. covering whole range from
industrial applications to laboratory and testing settings, MicroWire represents
a unique solution.
RVmagnetics MicroWire is a passive,
contactless sensor – element with no direct wiring that can be embedded into
material without damaging its integrity. Depending on requirements MicroWire is
capable of measuring pressure, strain, torsion, bending and other mechanical
quantities. MicroWire is also able to cover crack detection inside the material
and even play a key role in predictive maintenance of your products.
A tailor-made sensing solution providing a benefit of its size, range, chemical
resistance and on top thermally independent measurements. It can withstand
deformation of the material leading to MicroWire’s elongation up to
Contactless data acquisition can be performed through the materials and in
ideal case up to 10 cm distance.
RVmagnetics offers an opportunity to use a MicroWire sensor as a
reliable qualitative crack sensor – providing only digital information,
whether the object has been damaged.
Demonstration of Pressure measurement with MicroWire sensor
In this video we are demonstrating the use of RVmagnetics
MicroWire sensor for contactless and wireless pressure detection.
The main parts of the demonstration kit are:
black-box which includes the sensing head and electronics (the size and
shape of a final sensing system are tailor-made to meet the spatial
plastic bar, onto which a stress dependant MicroWire is attached with an
tablet containing a custom-designed application communicating with the
black-box via Bluetooth, displaying the real-time measurement of the stress
applied on the plastic bar with MicroWire sensor.
In the video, the demonstration happens by pushing and pulling the plastic
bar placed onto the holder. The MicroWire attached to the plastic bar has no
contact with the sensing head. Information about applied stress is transferred
via magnetic response of the MicroWire. It is detected by the sensing head of
the black box below. Black-box contains electronics generating the magnetic
field to obtain the MicroWire’s response and send it via Bluetooth to the
tablet. The blue bar on the tablet screen displays a real-time representation of
the direction and intensity of applied pressure.
The system is scalable according to the client’s needs and it can be
adjusted based on specific requirements. The system also allows addressing more
complex tasks, such as creating pressure distribution maps,
torsion of shafts, bending of steel beams, or other unique needs of the
customer. With vast and unique possibilities, it is important to showcase the
basics of the system, which we present in the video.