DESC:FIELD OF INVENTION
[001] The present invention relates generally to the field of energy harvesting. More particularly, the present invention relates to a system and a method for contactless energy harvesting from vibrations generated by a subject’s body.

BACKGROUND
[002] Energy conversion from one form to another is carried out for various purposes and quite widely. One of the common examples include conversion of mechanical energy to electrical energy, which can be seen in crank lanterns, piezoelectric integrated footwear, exercise pedal bikes, self-winding watches, etc. Typically, energy conversion from one form to another requires contact with the energy source. Further, existing energy conversion systems are bulky, requires large batteries and wired connections to main power lines for operation. The batteries used in the existing energy conversion systems require regular charging and connection to main power lines. Also, existing energy conversion systems require separate charging systems that utilize alternative sources of energy to sustain their working. It has been observed that use of separate charging systems for energy conversion systems causes discharging issues, requires cumbersome wired connections and leads to an unsatisfactory user experience.
[003] Further, human body generates various voluntary and involuntary organ motions or vibrations (such as, hand movements, leg movements, movement of blood, lungs, heart muscles etc.). Existing energy conversion systems (such as sensors) are not able to adequately utilize vibrations of the human body for conversion to another energy form (such as electrical energy). Further, the existing energy conversion system requires contact with the human body, which makes the energy conversion process invasive and uncomfortable for the subject. Furthermore, there is a risk of electrical shock and other associated electrical and chemical hazards to the subject due to use of direct mainline connections and high capacity conventional batteries. Yet further, existing energy conversion systems are not able to suitably harvest the energy converted in electrical form from the human body movements for energizing other components of the systems.
[004] In light of the above-mentioned drawbacks, there is a need for a system and a method which provides for optimal contactless energy harvesting from vibrations generated by a subject’s body. There is a need for a system and a method which provides for adequately utilizing vibrations of the human body for conversion to electrical energy. Further, there is a need for a system and a method which provides for effective storage of the electrical energy converted from human body vibrations for efficient usage.

OBJECT OF INVENTION
[005] The principal object of this invention is to provide a system and a method for optimal contactless energy harvesting from vibrations generated by a subject’s body.
[006] A further object of the invention is to provide an efficient harvesting of electrical energy converted from mechanical energy associated with vibrations generated by the subject’s body based on uniquely designed array of piezoelectric sensors.
[007] Another object of the invention is to provide an optimized usage of the harvested electrical energy for powering up of the components of the energy harvesting system.
[008] A further object of the invention is to provide an optimal power management to provide effective energy harnessing and quantification.
[009] Another object of the invention is to provide health monitoring of the subject while powering the energy harvesting system.

BRIEF DESCRIPTION OF FIGURES
[0010] This invention is illustrated in the accompanying drawings, throughout which, like reference letters indicate corresponding parts in the various figures.
[0011] The embodiments herein will be better understood from the following description with reference to the drawings, in which:
[0012] FIG. 1 illustrates a detailed block diagram of a system for efficient contactless energy harvesting from vibrations generated by a subject’s body, in accordance with an embodiment of the present invention;
[0013] FIG. 2 illustrates a sensor unit placed under a mattress on which a subject is sleeping, in accordance with an embodiment of the present invention;
[0014] FIG. 3 illustrates an array of piezoelectric sensors, inside a sensing unit, which are arranged in a pre-defined cluster for capturing macro and micro-vibration generated by the subject’s body;
[0015] FIG. 4 illustrates an exemplary computer system in which various embodiments of the present invention may be implemented; and
[0016] FIG. 5 illustrates a method for efficient contactless energy harvesting from vibrations generated by a subject’s body, in accordance with an embodiment of the present invention.

STATEMENT OF INVENTION
[0017] The present invention discloses a system and a method for optimal contactless energy harvesting from vibrations generated by a subject’s body. In particular, the present invention provides for efficient harvesting of electrical energy converted from mechanical energy associated with vibrations generated by the subject’s body based on uniquely designed array of piezoelectric sensors.
[0018] The system comprises an energy harvesting device, a data receiving unit, a server and a user device. The energy harvesting device and the data receiving unit are located at the user end. Further, the server is located at a remote location.
[0019] The energy harvesting device comprises an energy harvesting engine, a processor and a memory. The engine comprises a sensor unit, an energy management unit, a conversion unit, an energy source unit, and a transmission unit. Further, the sensor unit comprises a vibration energy harvesting unit and a sensing unit.
[0020] The present invention provides for optimized usage of the harvested electrical energy for powering up the components of the energy harvesting system. Further, the present invention provides for optimal power management to provide effective energy harnessing and quantification. Furthermore, the present invention provides for health monitoring of the subject while powering the energy harvesting system.

DETAILED DESCRIPTION
[0021] The embodiments herein and the various features and advantageous details thereof are explained more fully with reference to the non-limiting embodiments that are illustrated in the accompanying drawings and/or detailed in the following description. Descriptions of well-known components and processing techniques are omitted so as to not unnecessarily obscure the embodiments herein. The examples used herein are intended merely to facilitate an understanding of ways in which the embodiments herein may be practiced and to further enable those of skill in the art to practice the embodiments herein. Accordingly, the examples should not be construed as limiting the scope of the embodiments herein.
[0022] The present invention discloses a system and a method for optimal contactless energy harvesting from vibrations generated by a subject’s body. In particular, the present invention provides for efficient harvesting of electrical energy converted from mechanical energy associated with vibrations generated by the subject’s body based on uniquely designed array of piezoelectric sensors. The present invention provides for optimized usage of the harvested electrical energy for powering up of the components of the energy harvesting system. Further, the present invention provides for optimal power management to provide effective energy harnessing and quantification. Furthermore, the present invention provides for health monitoring of the subject while powering the energy harvesting system.
[0023] The present invention would now be discussed in context of embodiments as illustrated in the accompanying drawings.
[0024] FIG. 1 illustrates a detailed block diagram illustrating a system 100 for efficient contactless energy harvesting from vibrations generated by a subject’s body, in accordance with various embodiment of the present invention.
[0025] In an embodiment of the present invention, the system 100 is configured to capture vibrations generated by a subject’s (i.e. a person) body for energy harvesting and monitoring health of the subject. The vibrations are generated due to internal and external movements of the subject’s body. The internal movements of the subject’s body represent micro- vibrations including, but not limited to, ballistocardiographic (BCG) signals, movement of heart muscles, respiration movements and movement of blood. Further, the external movements of the subject’s body represent macro vibrations including, but not limited to, movement of hands, movement of legs and movements of subject during sleep.
[0026] In an embodiment of the present invention, the system 100 comprises an energy harvesting device 102, a data receiving unit 124, a server 126 and a user device 128. The energy harvesting device 102 and the data receiving unit 124 are located at the user end. Further, the server 126 is located at a remote location.
[0027] In an embodiment of the present invention, the energy harvesting device 102 comprises an energy harvesting engine 104, a processor 106 and a memory 108. In various embodiments of the present invention, the engine 104 comprises multiple units which operate in conjunction with each other for efficient energy harvesting, powering up of the components of engine 104 and health monitoring of the subject. The various units of the engine 104 are operated via the processor 106 specifically programmed to execute instructions stored in the memory 108 for executing respective functionality of the units of the engine 104, in accordance with various embodiments of the present invention.
[0028] In an embodiment of the present invention, the engine 104 comprises a sensor unit 110, an energy management unit 116, conversion unit 118, an energy source unit 120 and a transmission unit 122. Further, the sensor unit 110 comprises a vibration energy harvesting unit 112 and a sensing unit 114.
[0029] FIG. 2 illustrates a sensor unit placed under a mattress on which a subject is sleeping, in accordance with an embodiment of the present invention.
[0030] In an embodiment of the present invention, the sensor unit 110 is placed in a housing at the subject’s end. In an exemplary embodiment of the present invention, the sensor unit 110 is of a very low thickness and has an outer casing for protecting and covering the housing. The outer casing may be a robust and rugged thin cover made of a flexible material, (e.g. mesh, latex, cloth, polymer etc.). In an exemplary embodiment of the present invention, the sensor unit 110 may be of a particular shape and size that may include, but not limited to, rectangular, square, circular, oval etc. The sensor unit 110 is capable of being folded and is a lightweight device. In various embodiments of the present invention, the sensor unit 110 is deployed in a non-invasive and contactless manner. The sensor unit 110 (204, Fig. 2) may be placed under a medium such as a mattress, cushion, mat, carpet, etc. on which the subject may sit, stand, lie down or sleep, as illustrated in Fig. 2. The sensor unit 110 may be aligned in any resting position such as, but not limited to, sitting position, lying down position, etc, with respect to the subject.
[0031] FIG. 3 illustrates an array of piezoelectric sensors, inside a sensing unit, are arranged in a pre-defined cluster for capturing macro and micro-vibration generated by the subject’s body.
[0032] In an embodiment of the present invention, the sensor unit 110 is positioned in a contactless and a non-invasive manner at the subject’s end and is configured to capture macro and micro-vibrations generated by the subject’s body as analog data signals via the sensing unit 114. The macro and micro-vibrations relate to active and passive movements of the subject’s body. In an exemplary embodiment of the present invention, the sensing unit 114 (302, Fig. 3) comprises an array of piezoelectric sensors 304, which are arranged in a pre-defined cluster for effectively capturing the macro and micro-vibration generated by the subject’s body, as illustrated in Fig. 3. In an exemplary embodiment of the present invention, the piezoelectric sensors 304 are arranged in a 3D cluster form for efficiently capturing the macro and micro-vibrations generated by the subject’s body. The piezoelectric sensors may at least be stacked on one another or placed side by side. Further, the sensing unit 114 is capable of capturing macro and micro-vibrations received through the medium placed between the subject and sensing unit 114. In an exemplary embodiment of the present invention, the macro and micro-vibrations, which are in the form of mechanical energy, are captured by the array of piezoelectric sensors 304 (Fig. 3) present in the sensing unit 114. The macro and micro-vibrations are captured by the array of piezoelectric sensors 304 (Fig. 3) in a predetermined ‘sampling period’.
[0033] In an embodiment of the present invention, the sensing unit 114 is configured to communicate with the vibration energy harvesting unit 112 for transmitting the mechanical energy generated from the macro and micro-vibrations, which are in the form of analog signals. The vibration energy harvesting unit 112 comprises a piezoelectric transducer (PZT), a power converter and a capacitor or a first set of batteries. The PZT is configured to receive the mechanical energy from the array of piezoelectric sensors 304 (Fig. 3) of the sensing unit 114 and converts the received mechanical energy into electrical energy. In an exemplary embodiment of the present invention, the PZT is in the form of an aluminum cantilever with a piezoelectric patch. The electrical energy in the PZT is converted to an AC voltage power. Further, the PZT transfers the AC voltage power to the power converter, which is configured to rectify the AC voltage power. The rectified AC voltage is transferred to the capacitor or the first set of batteries for storage (i.e. for power harvesting). Further, advantageously, the vibration energy harvesting unit 112 is configured to optimize a high-power consumption operation of the device 102, using dynamic power harvesting.
[0034] In an embodiment of the present invention, the vibration energy harvesting unit 112 of the sensor unit 110 is configured to communicate with the energy management unit 116. The energy management unit 116 is configured to transfer the AC voltage power to the energy source unit 120 for charging the energy source unit 120 and managing the AC voltage power consumption by the energy source unit 120. In an embodiment of the present invention, the energy source unit 120 may comprise a second set of batteries, cells, etc. The second set of batteries may be of a power in the range of 0.5-9 V. The energy source unit 120 is periodically charged with the AC voltage power. In an embodiment of the present invention, the second set of batteries and cells are capable of being charged or replaced with new second set of batteries and cells. In an embodiment of the present invention, the energy source unit 120 is configured to power up the components of the energy harvesting device 102 such as, energy management unit 116, the conversion unit 118 and transmission unit 122. Further, the energy management unit 116 is configured to manage and optimize the power storage of the energy source unit 120.
[0035] In another embodiment of the present invention, the sensing unit 114 is configured to communicate with the conversion unit 118 for providing the analog signals associated with the macro and micro-vibrations. The conversion unit 118 is configured to convert the analog signals to digital signals using power from the energy source unit 120. The conversion unit 118 is configured to communicate with the energy management unit 116 for fetching power consumption data. Further, the digital signals along with the power consumption data are provided to the transmission unit 122. The transmission unit 122 is configured to communicate with the energy management unit 116 for transmitting the digital signals along with the power consumption data to the data receiving unit 124. The digital signals and the power consumption data are transmitted to the data receiving unit 124 using the power stored in the energy source unit 120. In an exemplary embodiment of the present invention, the digital signals and the power consumption data are transmitted to the data receiving unit 124 using a wireless mode of communication. The wireless mode of communication may include, but not limited to, Wi-Fi and Bluetooth®. Further, the digital signals also provide the operational status of the piezoelectric sensors. In an exemplary embodiment of the present invention, the data receiving unit 124 is placed at the user-end and is in a wireless communication with the energy harvesting device 102.
[0036] In an embodiment of the present invention, the data receiving unit 124 is configured to communicate with the server 126 and the user device 128. The data receiving unit 124 is configured to operate in the range of 110-124 V. The data receiving unit 124 is configured to transmit the digital signals and the power consumption data to the server 126 for storage and future retrieval. In an embodiment of the present invention, the server 126 is a cloud based server. The server 126 is configured to communicate with the user device 128, which comprises a user application. The user application in the user device 128 is specifically configured to receive the power consumption data from the server 126 for analyzing and determining power consumption rate of the energy harvesting device 102. The user application is also configured to monitor the power consumption and charging of the energy harvesting device 102.
[0037] In an embodiment of the present invention, the user application on the user device 128 is configured to process the digital signals received from the server 126 along with the power consumption data for determining power storage patterns to characterize user’s movements for monitoring health events including, but are not limited to, seizures, tremors, paralysis and anxiety.
[0038] FIG. 4 illustrates an exemplary computer system in which various embodiments of the present invention may be implemented. The computer system 402 comprises a processor 404 and a memory 406. The processor 404 executes program instructions and is a real processor. The computer system 402 is not intended to suggest any limitation as to scope of use or functionality of described embodiments. For example, the computer system 402 may include, but not limited to, a programmed microprocessor, a micro-controller, a peripheral integrated circuit element, and other devices or arrangements of devices that are capable of implementing the steps that constitute the method of the present invention. In an embodiment of the present invention, the memory 406 may store software for implementing various embodiments of the present invention. The computer system 402 may have additional components. For example, the computer system 402 includes one or more communication channels 408, one or more input devices 410, one or more output devices 412, and storage 414. An interconnection mechanism (not shown) such as a bus, controller, or network, interconnects the components of the computer system 402. In various embodiments of the present invention, operating system software (not shown) provides an operating environment for various software executing in the computer system 402, and manages different functionalities of the components of the computer system 402.
[0039] The communication channel(s) 408 allow communication over a communication medium to various other computing entities. The communication medium provides information such as program instructions, or other data in a communication media. The communication media includes, but not limited to, wired or wireless methodologies implemented with an electrical, optical, RF, infrared, acoustic, microwave, Bluetooth or other transmission media.
[0040] The input device(s) 410 may include, but not limited to, a keyboard, mouse, pen, joystick, trackball, a voice device, a scanning device, touch screen or any other device that is capable of providing input to the computer system 402. In an embodiment of the present invention, the input device(s) 410 may be a sound card or similar device that accepts audio input in analog or digital form. The output device(s) 412 may include, but not limited to, a user interface on CRT or LCD, printer, speaker, CD/DVD writer, or any other device that provides output from the computer system 402.
[0041] The storage 414 may include, but not limited to, magnetic disks, magnetic tapes, CD-ROMs, CD-RWs, DVDs, flash drives or any other medium which can be used to store information and can be accessed by the computer system 402. In various embodiments of the present invention, the storage 414 contains program instructions for implementing the described embodiments.
[0042] The present invention may suitably be embodied as a computer program product for use with the computer system 402. The method described herein is typically implemented as a computer program product, comprising a set of program instructions which is executed by the computer system 402 or any other similar device. The set of program instructions may be a series of computer readable codes stored on a tangible medium, such as a computer readable storage medium (storage 414), for example, diskette, CD-ROM, ROM, flash drives or hard disk, or transmittable to the computer system 402, via a modem or other interface device, over either a tangible medium, including but not limited to optical or analogue communications channel(s) 408. The implementation of the invention as a computer program product may be in an intangible form using wireless techniques, including but not limited to microwave, infrared, Bluetooth or other transmission techniques. These instructions can be preloaded into a system or recorded on a storage medium such as a CD-ROM, or made available for downloading over a network such as the internet or a mobile telephone network. The series of computer readable instructions may embody all or part of the functionality previously described herein.
[0043] The present invention may be implemented in numerous ways including as a system, a method, or a computer program product such as a computer readable storage medium or a computer network wherein programming instructions are communicated from a remote location.
[0044] FIG. 5 illustrates a method for efficient contactless energy harvesting from vibrations generated by a subject’s body, in accordance with an embodiment of the present invention.
[0045] The method 500 begins with positioning the sensor unit in a contactless and a non-invasive manner at the subject’s end, as depicted at step 502. Subsequently, the method 500 discloses capturing macro and micro-vibrations generated by the subject’s body as analog data signals via the sensing unit, as depicted at step 504. Thereafter, the method 500 discloses transmitting the mechanical energy generated from the macro and micro-vibrations as analog signals via the sensing unit, as depicted at step 506. Subsequently, the method 500 receiving and converting the mechanical energy from the sensing unit into electrical energy via the Piezo electric transducer (PZT), wherein the electrical energy in the PZT is converted to an AC voltage power, as depicted at step 508. Thereafter, the method 500 discloses transferring the AC voltage power from the vibration energy harvesting unit of the sensor unit to the energy source unit for charging and managing the AC voltage power consumption by the energy source unit, by using an energy management unit, as depicted at step 510. Subsequently, the method 500 discloses converting the analog signals received from the sensor unit to digital signals using power from the energy source unit and fetching power consumption data by using the conversion unit, as depicted at step 512. Thereafter, the method 500 discloses transmitting the digital signals and the power consumption data received from the conversion unit to the data receiving unit by using the transmission unit, wherein the data receiving unit transmits the same to the server for storage and future retrieval, as depicted at step 514. Subsequently, the method 500 discloses processing the digital signals received from the server along with the power consumption data for determining power storage patterns to characterize user’s movements for monitoring health events by using the user application, as depicted at step 516.
[0046] A method for efficient contactless energy harvesting from vibrations generated by a subject’s body is provided, in accordance with various embodiments of the present invention. The method provides for efficient harvesting of electrical energy converted from mechanical energy associated with the vibrations (micro and macro) generated by the subject’s body based on a uniquely designed array of piezoelectric sensors. The method further provides for health monitoring of the subject while powering the energy harvesting system.
[0047] Advantageously, in accordance with various embodiments of the present invention, the system and method of the present invention provides for optimized harnessing of micro vibrations from within the subject’s body as well as macro vibrations from external movements of the subject’s body in a sustained, energy-efficient manner over an extended period of time while simultaneously converting, measuring, transmitting those vibrations. Further, the system and method of the present invention provides for contactless health monitoring of the subject, while powering up the device used to capture the subject’s vibration. The system and method of the present invention provides for reducing electrical dependency of the subject and enhancing subject’s experience by removing requirement of a direct connection to main power lines, thereby increasing safety of the subjects. Further, the no external wires are used for connections in the present invention, thereby prevent entanglement accidents. Furthermore, the system and method of the present invention provides for managing a low load for efficient output.
[0048] Yet further, the system and method of the present invention provides for application in health monitoring of subject, healthcare, wellness determination of subject, consumer electronics and garment industry.
[0049] The foregoing description of the specific embodiments will so fully reveal the general nature of the embodiments herein that others can, by applying current knowledge, readily modify and/or adapt for various applications such specific embodiments without departing from the generic concept, and, therefore, such adaptations and modifications should and are intended to be comprehended within the meaning and range of equivalents of the disclosed embodiments. It is to be understood that the phraseology or terminology employed herein is for the purpose of description and not of limitation. Therefore, while the embodiments herein have been described in terms of preferred embodiments, those skilled in the art will recognize that the embodiments herein can be practiced with modification within the scope of the embodiments as described here. ,CLAIMS:We claim:
1. An energy harvesting device (102), comprising:
an energy harvesting engine (104) configured for contactless energy harvesting from vibrations generated by a subject’s body, comprising:
a sensor unit (110) configured to be positioned at the subject’s end in a contactless and non-invasive manner for capturing macro and micro-vibrations from the subject’s body and transmitting mechanical energy generated by macro and micro-vibrations as analog signals to a conversion unit (118);
a conversion unit (118) configured to convert analog signals, received from the sensor unit (110), to digital signals using power from an energy source unit (120);
a transmission unit (122) configured to communicate with an energy management unit (116) for transmitting the digital signals from the conversion unit (118) along with the power consumption data to a data receiving unit (124);
the energy management unit (116), which is in communication with the sensor unit (110), is configured to transfer an AC voltage power to the energy source unit (120) for charging and managing the AC voltage power consumption by the energy source unit (120); and

the energy source unit (120) is periodically charged with the AC voltage power and is configured to power up the components of the energy harvesting device (102).

2. The device as claimed in claim 1, wherein the engine (104) comprises multiple units which are configured to:
operate in conjunction with each other for efficient energy harvesting, powering up the components of the engine (104) and health monitoring of the subject; and
operate via a processor (106) specifically programmed to execute instructions stored in a memory (108) for executing respective functionality of the units of the engine (104).

3. The device as claimed in claim 1, wherein the sensor unit (110) comprising:
a sensing unit (114) configured to communicate with a vibration energy harvesting unit (112) for transmitting the mechanical energy generated from the macro and micro-vibrations; and
the vibration energy harvesting unit (112), communicatively connected to the energy management unit (116), is configured to optimize a high-power consumption operation of the device (102).

4. The device as claimed in claim 3, wherein the sensing unit (114) is configured to:
comprise an array of piezoelectric sensors (304) arranged in a pre-defined cluster for effectively capturing the macro and micro-vibration generated by the subject’s body which are in the form of mechanical energy; and
communicate with the conversion unit (118) for providing the analog signals associated with the macro and micro-vibrations, wherein the conversion unit (118) is configured to communicate with the energy management unit (116) for fetching power consumption data.

5. The device as claimed in claim 3, wherein the vibration energy harvesting unit (112) comprises a piezoelectric transducer (PZT), and wherein the piezoelectric transducer (PZT) is configured to:
receive and convert the mechanical energy from the sensing unit (114) into electrical energy, wherein the electrical energy in the PZT is converted to an AC voltage power; and
transfer the AC voltage power to a power converter, which is configured to rectify the AC voltage power, and the rectified AC voltage is transferred to at least one of capacitor, and first set of batteries for storage.

6. A system (100) for contactless energy harvesting, comprising:
an energy harvesting device (102) to capture vibrations generated by a subject’s body for energy harvesting and monitoring health of the subject, thereby generating and transmitting digital signals along with power consumption data to a data receiving unit (124);
the data receiving unit (124) which is in communication with a server (126) and a user device (128) is configured to transmit the digital signals and the power consumption data from the energy harvesting device (102) to a server (126) for storage and future retrieval;
the server (126) configured to communicate with the user device (128) is configured to store the digital signals and the power consumption data from the data receiving unit (124); and
the user device (128) comprising a user application, wherein the user application is configured to:
receive the power consumption data from the server (126) for analyzing and determining a power consumption rate of the energy harvesting device (102);
monitor the power consumption and charging of the energy harvesting device (102); and
process the digital signals received from the server (126) along with the power consumption data for determining power storage patterns to characterize user’s movements for monitoring health events comprising at least one of seizures, tremors, paralysis, and anxiety.

7. A method (500) for contactless energy harvesting from vibrations generated by a subject’s body, comprising:
positioning a sensor unit (110) of an energy harvesting engine (104) in a contactless and non-invasive manner at the subject’s end;
capturing macro and micro-vibrations generated by the subject’s body as analog data signals via a sensing unit (114) in the sensor unit (110);
transmitting mechanical energy generated from the macro and micro-vibrations, as analog signals via the sensing unit (114) in the sensor unit (110);
receiving and converting the mechanical energy from the sensing unit (114) into electrical energy through a Piezo electric transducer (PZT) in a vibration energy harvesting unit (112) of the sensor unit (110), wherein the electrical energy in the PZT is converted to an AC voltage power;
transferring the AC voltage power from the vibration energy harvesting unit (112) of the sensor unit (110) to an energy source unit (120) for charging and managing the AC voltage power consumption by the energy source unit (120) by using an energy management unit (116);
converting the analog signals received from the sensor unit (110) to digital signals using power from the energy source unit (120) and fetching power consumption data by using the conversion unit (118);
transmitting the digital signals, received from the conversion unit (118) and the power consumption data, to a data receiving unit (124) by using a transmission unit (122), wherein the data receiving unit (124) transmits the received digital signals and the power consumption data to a server (126) for storage and future retrieval; and
processing the digital signals received from the server (126) along with the power consumption data for determining power storage patterns to characterize user’s movements for monitoring health events by using a user application in a user device (128).

8. The method as claimed in claim 7, comprising configuring the energy harvesting engine (104) with multiple units for:
operating in conjunction with each other for efficient energy harvesting, for powering up of the components of the energy harvesting engine (104) and health monitoring of the subject; and
operating via a processor (106) that is specifically programmed to execute instructions stored in a memory (108) for executing respective functionality of the units of the energy harvesting engine (104).

9. The method as claimed in claim 7, comprising providing the sensor unit (110), wherein the sensor unit (110) comprising:
transmitting the mechanical energy generated from the macro and micro-vibrations by using a sensing unit (114) configured to communicate with a vibration energy harvesting unit (112); and
optimizing a high-power consumption operation of the device (102) by using the vibration energy harvesting unit (112) which is in communication with the energy management unit (116).

10. The method as claimed in claim 9, comprising configuring the sensing unit (114) for:
comprising an array of piezoelectric sensors (304) arranged in a pre-defined cluster for effectively capturing the macro and micro-vibration generated by the subject’s body which are in the form of mechanical energy; and
communicating with the conversion unit (118) for providing the analog signals associated with the macro and micro-vibrations, wherein the conversion unit (118) is configured to communicate with the energy management unit (116) for fetching power consumption data.

11. The method as claimed in claim 9, comprising providing a piezoelectric transducer (PZT) in the vibration energy harvesting unit (112), wherein the piezoelectric transducer (PZT) is configured for:
receiving and converting the mechanical energy from the sensing unit (114) into electrical energy, wherein the electrical energy in the PZT is converted to an AC voltage power; and
transferring the AC voltage power to a power converter, which is configured to rectify the AC voltage power, and the rectified AC voltage is transferred to at least one of capacitor, and first set of batteries for storage.