Prior-Art/Patentability
Batteryless wireless control switch using prestressed piezoelectric diaphragm material
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Table of Contents
1.0OBJECTIVE
2.0SUMMARY
2.1Scope of the invention
2.2Features of the invention
2.3Application
3.0SCOPE OF WORK
4.0SEARCH SUMMARY
5.0SUBJECT FEATURES
6.0KEYWORDS
7.0PATENT CLASSIFICATIONS
8.0SEARCH STRINGS
9.0RESEARCH FINDINGS
9.1Relevant Patent References
9.2Background Patent References
9.3Non-Patent Literaturesdd
10.0PATENTABILITY ANALYSIS
10.1Novelty Analysis
10.2Inventive step Analysis
10.3Industrial Application:
11.0CONCLUSION
1.0OBJECTIVE
The objective of the report is to provide a sample Prior-Art/Patentability/Novelty search on "Batteryless wireless control switch using prestressed piezoelectric diaphragm material".Search techniques considered proprietary at Saturo Globalaiming towards more in-depth studies than that is presented here are however not included. The study incorporates search techniques proverbial to professionals involved in this kind of study.
2.0SUMMARY
2.1Scope of the invention
Batteryless wireless control switch using prestressed piezoelectric diaphragm material
2.2Features of the invention
Method of produce electrical energy by piezoelectric powered wireless electronic switches. The conversion of mechanical energy into electrical energy is based on by depressing the piezoelectric diaphragm materialto produce some electrical energy for powering the wireless radio frequency (RF) transmitter in a wireless manner.
2.3Application
This invention has potential industrial application in producing batteryless wireless control switch
3.0SCOPE OF WORK
- Based on the given query, keywords and patent classifications were indentified
- Using the identified keywords and patent classifications, relevant patents were retrieved
- A primary list of relevant patents, central to the given query is provided
- A secondary list of patents, peripheral to the given query is also provided
- A non-patent references relevant to the given query is provided
4.0SEARCH SUMMARY
Subject features (Refer Section 4.0) were structured based on the understanding of the given invention disclosure and the search was carried out in various patent databases like PatBase, USPTO, WIPO, Espacenet, and Google patents. Non patent databases such PatBase, Science.gov, WorldWideScience, ScienceDirect and Google to identify relevant non-patent references. References retrieved in the field of Programmable active pulsatility emulation system based on roller pump flow loop with active pneumatic dampers were analyzed for relevance.
5.0SUBJECT FEATURES
The following subject features were summarized based on the detailed analysis on the given invention
- A method and device to harvest/produce electrical energy
- The said device comprises
- A batteryless wireless control switch
- A piezoelectric diaphragm material
- The principle of operation of the said method comprises
- Depressing the switch via a mechanical force
- The said force is applied onto the piezoelectric diaphragm material
- The mechanical energy is converted into electrical energy
- The significant advantages of the wireless control switch includes
- It eliminates the high manpower
- Eliminates material costs in laying wiring cables between the switches and the devices
6.0KEYWORDS
Harvest, Produce, Electric, Current, Piezo-Electric, Diaphragm, Mechanical, Force, Conversion, Energy,Batteryless, Wireless, Control Switch, Pressing, Depressing
7.0PATENT CLASSIFICATIONS
The below attached word categorizes include various patent classifications of IPC, CPC and USC.
8.0SEARCH STRINGS
The below attached word categorizes various search strings used to identify patent references for the invention disclosure using PatBase, USPTO, EPO, WIPO, IPOS and non-patent references using PubMed, Science.gov, WorldWideScience and ScienceDirect.
9.0RESEARCH FINDINGS
A search on “Batteryless wireless control switch using piezoelectric diaphragm material” was carried out using relevant patent databases such as USPTO, WIPO and EPO. A comprehensive search executed using related keywords yielded over 2000 granted patents and patent publication applications. The search was further narrowed down to 1000 patent references using additional related keywords and subsequently a little over 500 patent references using combinatorial search strategies (Keywords + IPC/USC/ECLA codes). An in-depth analysis of the patent references yielded one (1) relevant reference and three (3) background references.
A comprehensive search was also carried out on the said concept for non-patent literatures using databases such PubMed, Science.gov, WorldWideScience, ScienceDirect and Google. The search yielded nearly 1500 non-patent literatures and it was narrowed down further to nearly 400 literatures. An in-depth analysis of the resulted literatures identified three (3) references relevant to the focus of the given disclosure.
9.1Relevant Patent References
The table identifies patent references as being central to the focus of the invention disclosure.
Pat/Pub Number / Kind code / Issue Date / Filing Date / Priority Data / #1US7161276 / B2 / 01/09/2007 / 10/25/2004 / 10/24/2003
Title / Self-powered, electronic keyed, multifunction switching system
First Inventor / Face, Bradbury R
Assignee / Face International Corp
Description: The present invention relates to an electronically coded switching system, such as may be used for a light or electrical appliance, mechanical door lock and the like. In specific the present invention relates to a self-powered electronic keypad device that generates one or more activation signals for a switch. Electrical power is generated by simultaneously deforming a piezoelectric element while pressing individual buttons. The piezoelectric element in the electroactive actuator is capable of deforming with a high amount of axial displacement, and when deformed by a mechanical impulse generates an electric field. The electroactive actuator is used as an electromechanical generator for generating an electrical signal that actuates a switch. The invention eliminates the need to have wiring on the surface of the walls and floors.
Family Patents / US20050168108A1, WO2005041464A2, WO2005041464A3
Subject Features / 1, 2, 2A, 2B, 3, 3A, 3B, 3C, 4A, 4B
Citation Details / The present invention relates to an electronically coded switching system, such as may be used for a light or electrical appliance, mechanical door lock and the like. More particularly, the present invention relates to a self-powered electronic keypad device that generates one or more activation signals for a switch. Electrical power is generated by simultaneously deforming a piezoelectric element while pressing individual buttons and/or entering a code on an electronic keypad. When the correct code is entered, the electrical power may then be used to directly or through and RF transmitter-receiver pair to actuate a device, such as a solenoid or key pin to engage and disengage the lock, or perform some other command function. [Para#0003]
The present invention provides a self-powered electronically coded switching system or device using an electroactive actuator. The piezoelectric element in the electroactive actuator is capable of deforming with a high amount of axial displacement, and when deformed by a mechanical impulse generates an electric field. The electroactive actuator is used as an electromechanical generator for generating an electrical signal that actuates a switch, relay and/or locking mechanism. In the preferred embodiment of the invention, the electromechanical generator comprises THUNDER. [Para#0014]
In one embodiment of the present invention displaceable keyed buttons are each mechanically connected to individual piezoelectric generators. When depressed each piezoelectric element generates an electrical charge. In a second embodiment of the invention, all of individual depressible buttons are connected to a single (preferably larger) piezoelectric element. The larger piezoelectric element is capable of generating a larger electrical charge than a smaller element. [Para#0015]
Furthermore, the transmitters can talk to a central system or repeater which re-transmits the signals by wire or wireless means to lights and appliances. In this manner, one can have one transmitter/receiver set, or many transmittersinteracting with many different receivers, some transmitters talking to one or more receivers and some receivers being controlled by one or more transmitters, thus providing a broad system of interacting systems and wireless transmitters. Also, the transmitters and receivers may have the capacity of interfacing with wired communications like SMARTHOME or BLUETOOTH. [Para#0138]
9.2Background Patent References
The below table identifies patent documents as being peripheral to the focus of the invention disclosure.
S.No / Document No. / Filing Date / Title1 / US6049158 / 02/09/1995 / Piezoelectric/electrostrictive film element having convex diaphragm portions and method of producing the same
Subject Features:2, 2B, 3, 3A, 3B
Citation:Refer Claim#1, claim#7
2 / US6407481 / 03/01/2000 / Piezoelectric/electrostrictive device having convexly curved diaphragm
Subject Features:2, 2B, 3, 3A, 3B
Citation: Refer Claim#1, claim#35
3 / WO1999013518 / 09/04/1998 / PIEZOELECTRIC/ELECTROSTRICTION DEVICE
Subject Features:2, 2B, 3, 3A, 3B
Citation: ReferAbstract
9.3Non-Patent Literaturesdd
The below table identifies non-patent references pertaining to the focus of the invention disclosure.
Bibliography / Industrial Technology, 2006. ICIT 2006. IEEE International Conference on; 2006; 1711-1716 / #1Title / Energy Harvesting using Piezoelectric Igniter for Self-Powered Radio Frequency (RF) Wireless Sensors
Author(s) / Tan, Y.K. Hoe, K.Y. Panda, S.K.
Abstract:The field of miniature low-powered and low cost wireless sensor nodes has been growing tremendously and the wireless sensor nodes have been widely used in applications like medical implants, embedded sensors in building, military applications, etc. However, little research works have been carried out on the energy sources of the wireless sensors such that the sensor nodes become self-powered. This paper discusses various renewal energy sources available in the environment that can be tapped to supply energy for these wireless sensors. This paper has special interest on piezoelectric generator because it is simple and easy to harvest mechanical force energy from human beings as compared to other energy sources. An energy harvesting circuit design for piezoelectric pushbutton-generator is proposed and implemented efficiently for wireless radio frequency (RF) transmitter. This self-powered wireless transmitter is capable of transmitting a 12-bit digital word information using the mechanical force energy harvested from depressing the pushbutton which is attached to the energy harvesting circuit. The experimental results show that when the piezoelectric pushbutton is depressed, 67.61 muJ of electrical energy is scavenged and it is sufficient to transmit 2 complete 12-bit digital word information via the RF unit. The RF unit consumes 26.4 muJ of energy for 1 word transmission.
Citation: This self-powered wireless transmitter is capable of transmitting a 12-bit digital word information using the mechanical force energy harvested from depressing the pushbutton which is attached to the energy harvesting circuit. The experimental results show that when the piezoelectric pushbutton is depressed, 67.61 muJ of electrical energy is scavenged and it is sufficient to transmit 2 complete 12-bit digital word information via the RF unit. The RF unit consumes 26.4 muJ of energy for 1 word transmission. [Abstract]
Bibliography / Sensor Technologies and Applications, 2007. SensorComm 2007. International Conference on; 2007; 399-404 / #2
Title / System-Level Simulation of a Self-Powered Sensor with Piezoelectric Energy Harvesting
Author(s) / Mateu, Loreto Moll, Francesc
Abstract:This paper presents a complete system simulation of a self-powered communication module. The components are described with the Verilog-A language, that allows to merge the electrical and mechanical models of the system. The self-powered sensor system is composed by an energy har- vesting piezoelectric generator that powers a RF transmit- ter. The simulations here presented compare between the case of a battery-less and battery-powered system. The results obtained with the simulation model implemented allow to show how design choices of the system change the periodicity of the transmission and the ability to recharge the battery.
Citation: The simulations here presented compare between the case of a battery-less and battery-powered system. The results obtained with the simulation model implemented allow to show how design choices of the system change the periodicity of the transmission and the ability to recharge the battery. [Abstract]
Bibliography / Journal of Electroceramics; 2007; 19(1); 167-184 / #3
Title / Advances in energy harvesting using low profile piezoelectric transducers
Author(s) / Shashank Priya
Abstract:The vast reduction in the size and power consumption of sensors and CMOS circuitry has led to a focused research effort on the on-board power sources which can replace the batteries. The concern with batteries has been that they must always be charged before use. Similarly, the sensors and data acquisition components in distributed networks require centralized energy sources for their operation. In some applications such as sensors for structural health monitoring in remote locations, geographically inaccessible temperature or humidity sensors, the battery charging or replacement operations can be tedious and expensive. Logically, the emphasis in such cases has been on developing the on-site generators that can transform any available form of energy at the location into electrical energy. Piezoelectric energy harvesting has emerged as one of the prime methods for transforming mechanical energy into electric energy. This review article provides a comprehensive coverage of the recent developments in the area of piezoelectric energy harvesting using low profile transducers and provides the results for various energy harvesting prototype devices. A brief discussion is also presented on the selection of the piezoelectric materials for on and off resonance applications. Analytical models reported in literature to describe the efficiency and power magnitude of the energy harvesting process are analyzed.
Citation: This review article provides a comprehensive coverage of the recent developments in the area of piezoelectric energy harvesting using low profile transducers and provides the results for various energy harvesting prototype devices. A brief discussion is also presented on the selection of the piezoelectric materials for on and off resonance applications. Analytical models reported in literature to describe the efficiency and power magnitude of the energy harvesting process are analyzed. [Abstract]
10.0PATENTABILITY ANALYSIS
10.1Novelty Analysis
Based on our analysis, a novel energy harvesting mechanism by using a piezoelectric diaphragm material do not appear to be discussed in any of the patent and non patent literatures. Accordingly, it appears that the present invention seems to meet novelty.
10.2Inventive step Analysis
Based on our analysis, the conversion of mechanical energy into electrical energy is based on by depressing the piezoelectric diaphragm material to produce some electrical energy for powering the wireless radio frequency (RF) transmitter in a wireless manner do not appear to be discussed in any of the patent and non patent literatures or in any combination of the given prior art references. Accordingly, it appears that the present invention seems to meet inventiveness.
10.3Industrial Application:
We believe that, the discussed inventions have potential industrial applications.
11.0CONCLUSION
Based on the teachings of the search analysis we infer that, "a novel energy harvesting mechanism by using a piezoelectric diaphragm material" appears to be a novel/patentable.
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