Dr. Kesorn Pechrach Weaver- Piezoelectrics in Prosthetics: Energy harvesting: How to install piezoelectric in prosthesis foot

Dr. Kesorn Pechrach Weaver- Piezoelectrics in Prosthetics: Energy harvesting: How to install piezoelectric in prosthesis foot: How to install piezoelectric in prosthesis foot There are six sets of MFC Piezoelectric were installed underneath the prosthesis foot...

How to install piezoelectric in prosthesis foot

How to install piezoelectric in prosthesis foot

There are six sets of MFC Piezoelectric were
installed underneath the prosthesis foot.
This would use to harvesting power out
from the lower prosthetic legs.

Ref:Piezoelectrics in Prosthetics: Energy Harvesting

Dr. Kesorn Pechrach Weaver- Piezoelectrics in Prosthetics: Energy harvesting: How to put MFC piezoelectric on foot prosthesis

Dr. Kesorn Pechrach Weaver- Piezoelectrics in Prosthetics: Energy harvesting: How to put MFC piezoelectric on foot prosthesis: How to put MFC piezoelectric on foot prosthesis The movement of the prosthetic legs and the foot prosthesis would generate energy di...

How to put MFC piezoelectric on foot prosthesis

How to put MFC piezoelectric on foot prosthesis

The movement of the prosthetic legs and
the foot prosthesis would generate energy
directly from PZT and MFC piezoelectric.
The integrated low loss full wave bridge
rectifier with a high efficiency buck
converter was designed to connect directly
to PZT and MFC piezoelectric.

Reference:

Piezoelectrics in Prosthetics: Energy Harvesting

Dr. Kesorn Pechrach Weaver- Piezoelectrics in Prosthetics: Energy harvesting: How to put piezoelectric and hitting device toget...

Dr. Kesorn Pechrach Weaver- Piezoelectrics in Prosthetics: Energy harvesting:
How to put piezoelectric and hitting device toget...: How to put piezoelectric and hitting device together The major limitations of harvesting the energy from piezoelectric devices are not ...

How to put piezoelectric and hitting device together

The major limitations of harvesting the
energy from piezoelectric devices are not
only providing low power, but also the
difficulty to investigate their behaviour
when applying to some applications such
as prosthetic legs. Thus, the investigating
of the output voltage waveforms when hitting
the upper arm of the piezoelectric
PZT was shown.

Reference:

Piezoelectrics in Prosthetics: Energy Harvesting

Slow Contact Opening Circuit Breakers

Dr. Kesorn Pechrach Weaver- Piezoelectrics in Prosthetics: Energy harvesting: How to Put Piezoelectric in the Upper Prosthetic

Dr. Kesorn Pechrach Weaver- Piezoelectrics in Prosthetics: Energy harvesting: How to Put Piezoelectric in the Upper Prosthetic: Piezoelectric in the Upper Prosthetic The series of piezoelectric was used to embed inside the socket area including the hitting harves...

How to Put Piezoelectric in the Upper Prosthetic

Piezoelectric in the Upper Prosthetic

The series of piezoelectric was used to embed inside the socket area
including the hitting harvesting kit. The
complete set would be moulded as part of
the material for the upper prosthetic leg.

Reference: Piezoelectrics in Prosthetics: Energy Harvesting

Research Information from: Ronsek.com

Indoor golf testing

Dr. Kesorn Pechrach Weaver- Piezoelectrics in Prosthetics: Energy harvesting: PSCAD/PSPICE and Piezoelectric PZT

Dr. Kesorn Pechrach Weaver- Piezoelectrics in Prosthetics: Energy harvesting: PSCAD/PSPICE and Piezoelectric PZT: PSCAD/PSPICE and Piezoelectric PZT The investigation of the actual open-circuit output voltage at no load operation together with measur...

PSCAD/PSPICE and Piezoelectric PZT

PSCAD/PSPICE and Piezoelectric PZT

The investigation of the actual open-circuit
output voltage at no load operation
together with measuring the output
parameters (resistance and capacitance) of
the PZT by RLC meter were applied and
the data were used to complete the
modelling by PSCAD/PSPICE.

It would be useful not only for the energy management circuit
analysis but also in the design system.
The output voltage waveforms was used to
discussed with the general output
characteristic of the piezoelectric PZT from
the simplified mechanical model [23].

Reference:

Ronsek.com

Piezoelectrics in Prosthetics: Energy Harvesting

Dr. Kesorn Pechrach Weaver- Piezoelectrics in Prosthetics: Energy harvesting: DC motor employed with Piezoelectric

Dr. Kesorn Pechrach Weaver- Piezoelectrics in Prosthetics: Energy harvesting: DC motor employed with Piezoelectric: DC motor employed with Piezoelectric This chapter presents the electromechanical technique for the piezoelectric PZT (Lead Zirconate...

DC motor employed with Piezoelectric

DC motor employed with Piezoelectric

This chapter presents the electromechanical
technique for the
piezoelectric PZT (Lead Zirconate Titanate).
The electromechanical characteristic of the
studied PZT would be analyzed based on
experiments while the investigation of the
energy generation was shown in Figure 6.1
which used a DC motor which employed as
the mechanical force source. It used to
control the action which would make contacts to one of the piezoelectric PZT arm
at the frequency 1 Hz. The output voltage
waveform, VP, generated from the PZT is
observed, investigated and measured the
value at each touching step.

 

Reference:  Piezoelectrics in Prosthetics: Energy Harvesting Paperback – 25 Apr 2016 by Dr Kesorn Pechrach Weaver PhD (Author)

Dr. Kesorn Pechrach Weaver- Piezoelectrics in Prosthetics: Energy harvesting: Damping Factors: Piezoelectric in Prosthetics

Dr. Kesorn Pechrach Weaver- Piezoelectrics in Prosthetics: Energy harvesting: Damping Factors: Piezoelectric in Prosthetics: Damping Factors The voltage source was used as the proposed model. The main internal parameters are as following: - the output resistan...

Damping Factors: Piezoelectric in Prosthetics

Damping Factors

The voltage source was used as the
proposed model. The main internal
parameters are as following:

- the output resistance RP
- the output capacitance CP

They are measured by a RCL meter (Fluke
PM6306).
The duration of the voltage response from
Figure 6.2 can be modelled as a secondorder
parallel RLC circuit. The resonance
equation can be express as a function of
complex frequency (S1 and S2), which was
used to determine the values of R, L and C.

 

 Reference: Piezoelectrics in Prosthetics: Energy Harvesting Paperback – April 25, 2016 by Dr Kesorn Pechrach Weaver PhD (Author)

 

Dr. Kesorn Pechrach Weaver- Piezoelectrics in Prosthetics: Energy harvesting: Prosthetic Leg with harvesting equipments

Dr. Kesorn Pechrach Weaver- Piezoelectrics in Prosthetics: Energy harvesting: Prosthetic Leg with harvesting equipments: Prosthetic Leg with harvesting equipments The period of standing phase the direction of the reaction force exerted by the ground coinci...

Prosthetic Leg with harvesting equipments

Prosthetic Leg with
harvesting equipments

The period of standing phase the direction
of the reaction force exerted by the ground
coincides with the direction of the relative
motion of the ankle joint.

Foot

It uses to contact to the ground and
provides shock absorption and stability.

Knee

There needs a complex connector allowing
flexion during swing-phase.

 

Reference: Piezoelectrics in Prosthetics: Energy Harvesting Paperback – 25 Apr 2016 by Dr Kesorn Pechrach Weaver PhD (Author)

Green Energy Harvesting in Prosthetics

Energy Harvesting

The green energy harvesting here will
emphasis use of piezoelectric devices in
Prosthetic legs. Geometric parameters,
beam, mass and resistive electric loads
significantly influence the output power [4].
The piezoelectric CMOS harvesting could
bypass the input voltage and recover some
energy to increase the energy during
negative piezoelectric voltage.

The devices that have been used are
piezoelectric, electromagnetic, electrostatic,
pyroelectric, photovoltaic and
thermoelectric. The conversion of
harvesting energy is very good in
scalability, capability, high energy density
and compatible with standard electronic
technology. In addition, the piezoelectric
could be coupled to a mechanism to
perform opening of the contacts in the
switching devices [1-3].

Reference:  Piezoelectrics in Prosthetics: Energy Harvesting Paperback – 25 Apr 2016 by Dr Kesorn Pechrach Weaver PhD (Author)

Piezoelectric Test in Prosthetics: Energy harvesting

CHAPTER 1

ENERGY HARVESTING

This works present the design of an energy
harvesting system using smart materials
for self power generation of upper and
lower prosthetic legs. The smart materials
like Piezo Composites, Piezo Flexible Film,
Macro Fibre Composites, and PZT have
been employed and modified to be
appropriately embedded in the
prosthesis.

The movements of the prosthesis would
extract and transfer energy directly from
the piezoelectric via a converter to a power
management system. Afterward, the power
management system manages and
accumulates the generated electrical energy
to be sufficient for later powering electronic
components of the prosthesis.
The experimental results of energy
harvesting and efficiency in peak
piezoelectric voltages during step up and
continuous walking for a period of time.
One of the most interesting sources for
energy harvesting is environmental
vibrations.

The devices that have been used are
piezoelectric, electromagnetic, electrostatic,

Reference: Piezoelectrics in Prosthetics: Energy Harvesting Paperback – 25 Apr 2016 by Dr Kesorn Pechrach Weaver PhD (Author)