2) Field of invention
It is an electrical engineering design which can be used during the operation of Transducers/sensors like strain gages etc. The concept of piezo-patch as a power source for Transducers/sensors like strain gages can be used to compensate the drop in excitation voltage for the remotely located sensors.

3) Use of invention
This invention finds application in the field of helicopter specifically in sensing and powering of Transducers /sensors.
4) Prior art
In the previous design, if Transducers /sensors are located at remote location the methods ' commonly used to compensate the drop in excitation voltage are:-
1) Remote sensing method uses extra sense wires to regulate the excitation voltage to compensate for lead losses and deliver the needed voltage across the Transducers /sensors.
2) The other method is by using a separate measurement channel to measure directly the excitation power delivered across the Transducers /sensors.
5) Draw backs of prior art
There are few shortcomings in the earlier design which is mentioned below:
. Remote sensing method requires extra cables for Transducers /sensors, thereby increase in
weight gain. . The separate measurement channel method increases the measurement points which add to
the complexity and the chances of measurement error.
• Inspection process is tedious. .
• Maintainability issues.
• Traceability issues.
6) Comparison between prior art and present invention
In the earlier design, remote sensing and a separate measurement channel method are used to compensate the drop in excitation voltage to Transducers /sensors.
in the present design, the conceptual design of piezo-patch as a power source for Transducers • /sensors can be used to compensate the drop in excitation voltage to Transducers /sensors thereby eliminates the measurement complexity.
7) Aim of the invention
The prime objective of the invention is to compensate the drop in excitation voltage for the remotely located Transducers /sensors like strain gages. The present invention also aims to improve the

productivity by reducing the enormous human effort, eliminates the routing of extra cables and measurement complexity of earlier design.
8) Summary of the present invention
Transducers /sensors located at remote location will experience a drop in excitation voltage. The concept of piezo-patch as power source for Transducers /sensors can compensate the drop in excitation voltage.
9) Brief description of drawings
The Figurel depicts the prior design of Transducers /sensors like strain gage. The Figure 2 illustrates the new design with the inclusion of piezo-patch to compensate the excitation voltage drop and as a power source.
Figure 2: Conceptual design with Piezo-patch for Transducers/sensors like strain gauge. 10) Statement of invention
Conceptual design of Piezo-patch as a power source for Transducers/sensors is a novel technique of measurement. The concept can be used to supply a constant excitation voltage/power source for Transducers/sensors like strain gages.
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11) Detailed description of invention
There are several available sensing principles for mechanical sensing. These range from the well established sensors like strain gages to innovative and so far unproven technologies like for example sensing devices based on nano-materials. While there are several methods for measuring strains, the most common is with a strain gage, a device whose electrical resistance varies in proportion to the amount of strain in the device. The changes in electrical resistance are measured with a dedicated strain amplifier using an electrical circuit called a Wheatstone bridge. The Wheatstone bridge consists of four resistors arms with an excitation voltage from signal conditioner that is applied across the bridge. -When the gage bears a strain and initiates a resistance change, the bridge output's a corresponding voltage. If the strain gage circuit is located a distance away from the signal conditioner and excitation source, a possible source of error is voltage drop caused by resistance in the wires. The earlier design of compensating the excitation voltage is by remote sensing and separate channel methods. The method proposed here is by using the piezo-patch at these remote locations.
The present conceptual design of piezo-patch as a power source is a novel technique of measurement. When a piezopatch mechanically deforms as a result of a force applied with tension or pressure, charges are generated, which can be measured as a voltage on the electrodes. The voltage generated from piezo-patch can be utilized for powering the remotely located Transducers/ Sensors. The drop in excitation voltage can be compensated by placing the piezo-patch near to Transducers/Sensors.

Claims
We claim that,
"1. Transducers like strain gauge along with the piezo-patch can acts as sensor and power supply unit for remote sensing application.
2. Methodology adopted in using the concept of design of piezo-patch as a power source for transducers /sensors from ambient vibrations.
3. The piezopatch can be used as an alternate excitation power supply source to Transducers/Sensors like strain gages.
4. The piezopatch can act as voltage regulator for Transducers/Sensors like strain gages.
5. The piezopatch is easy and simple in design and chances of error in measurement can be minimized.