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公开(公告)号：US11539241B2
公开(公告)日：2022-12-27
申请号：US17681819
申请日：2022-02-27
Applicant: Purdue Research Foundation
Abstract: A system is disclosed which includes a chamber, one or more transmitters configured to emit EM radiation, one or more power harvesters, one or more EM stirrer, and a processing system configured to a) receive a measure of dimensional characteristics of the chamber b) control the one or more EM stirrers, c) evaluate statistical properties of the statistical EM environment, d) set a new criterion for acceptable statistical properties of the statistical EM environment, e) measure a lowest usable frequency of the chamber below which the statistical properties are not acceptable according to a predetermined criterion, f) determine an efficiency profile of the one or more power harvesters versus frequency, g) select an operating frequency that maximizes efficiencies of the one or more power harvesters, h) measure a collective efficiency of the chamber, and i) return to step d if the measured collective efficiency is below a predetermined efficiency threshold.
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公开(公告)号：US09917344B2
公开(公告)日：2018-03-13
申请号：US15098969
申请日：2016-04-14
Applicant: Purdue Research Foundation
Inventor： Juan Zeng , Zhengan Yang , Dimitrios Peroulis
CPC classification number: H01P7/06 , H01H59/00 , H01P1/205 , H01P1/2053 , H01P1/208 , H01P7/065 , H03H2003/027 , H03J3/02
Abstract: A cavity resonator tuning diaphragm comprising a plurality of inner corrugations, the plurality of inner corrugations having a first depth. An outer corrugation located between the plurality of inner corrugations and a perimeter of the diaphragm is also included, the outer corrugation having a second depth greater than the first depth. The addition of the outer deep corrugation provides increased thermal stability and reduced required actuation voltage.
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公开(公告)号：US09383267B2
公开(公告)日：2016-07-05
申请号：US13907624
申请日：2013-05-31
Applicant: Purdue Research Foundation
Inventor： Lokesh Anilkumar Gupta , Dimitrios Peroulis
CPC classification number: G01K7/38 , F16J15/3492 , G01K7/36 , G01K13/08 , G01N25/72 , G01R33/038 , G01R33/07
Abstract: A system for measuring a physical characteristic of a bearing includes a permanent magnet and a magnetic sensor. The permanent magnetic is coupled to at least a portion of a bearing, and has a magnetic field that changes as a function of the physical characteristic. For example, the permanent magnet has a magnetic characteristic that changes as a function of temperature. The magnetic sensor is operably disposed in a magnetic field sensing relationship with the permanent magnet, and is configured to generate a voltage signal and/or current signal corresponding to a sensed magnetic field.
Abstract translation: 用于测量轴承的物理特性的系统包括永磁体和磁传感器。 永久磁铁耦合到轴承的至少一部分，并且具有作为物理特性的函数而变化的磁场。 例如，永磁体具有作为温度的函数而变化的磁特性。 磁传感器可操作地设置在与永磁体的磁场感应关系中，并被配置为产生对应于检测到的磁场的电压信号和/或电流信号。
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公开(公告)号：US09039280B2
公开(公告)日：2015-05-26
申请号：US13747433
申请日：2013-01-22
Applicant: Purdue Research Foundation
Inventor： Dimitrios Peroulis , Andrew S Kovacs , David Joseph Koester , Farshid Sadeghi , Sean M Scott , Douglas Edward Adams
Abstract: A micro-electromechanical system-type (MEMS) sensor arrangement for wirelessly measuring temperatures is disclosed. The MEMS sensor arrangement includes a multimorph sensor, a sensor coil coupled to the multimorph sensor, and a readout coil configured to be magnetically coupled to the sensor coil to i) energize the sensor coil, and ii) provide a readout of the natural frequency of the multimorph sensor, the sensor coil and the readout coil.
Abstract translation: 公开了一种用于无线测量温度的微机电系统型（MEMS）传感器装置。 MEMS传感器装置包括多像素传感器，耦合到多像素传感器的传感器线圈和被配置为磁耦合到传感器线圈的读出线圈，以便i）激励传感器线圈，以及ii）提供读出的固有频率 多像素传感器，传感器线圈和读出线圈。
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公开(公告)号：US20140355644A1
公开(公告)日：2014-12-04
申请号：US13907624
申请日：2013-05-31
Applicant: Purdue Research Foundation
Inventor： Lokesh Anilkumar Gupta , Dimitrios Peroulis
CPC classification number: G01K7/38 , F16J15/3492 , G01K7/36 , G01K13/08 , G01N25/72 , G01R33/038 , G01R33/07
Abstract: A system for measuring a physical characteristic of a bearing includes a permanent magnet and a magnetic sensor. The permanent magnetic is coupled to at least a portion of a bearing, and has a magnetic field that changes as a function of the physical characteristic. For example, the permanent magnet has a magnetic characteristic that changes as a function of temperature. The magnetic sensor is operably disposed in a magnetic field sensing relationship with the permanent magnet, and is configured to generate a voltage signal and/or current signal corresponding to a sensed magnetic field.
Abstract translation: 用于测量轴承的物理特性的系统包括永磁体和磁传感器。 永久磁铁耦合到轴承的至少一部分，并且具有作为物理特性的函数而变化的磁场。 例如，永磁体具有作为温度的函数而变化的磁特性。 磁传感器可操作地设置在与永磁体的磁场感应关系中，并被配置为产生对应于检测到的磁场的电压信号和/或电流信号。
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公开(公告)号：US20140202837A1
公开(公告)日：2014-07-24
申请号：US14019939
申请日：2013-09-06
Applicant: Purdue Research Foundation
Inventor： Adam Joseph Fruehling , Dimitrios Peroulis
CPC classification number: H01H59/0009 , H01H1/0036
Abstract: A MEMS switch includes a semiconductor substrate, a movable cantilever and a cantilever anchor. The semiconductor substrate includes a device layer and a handle. The movable cantilever is formed in the semiconductor substrate, and is disposed over a void in the handle. The cantilever anchor is formed in the semiconductor substrate and defines a side wall of the void. A metal portion is formed on at least a portion of the movable cantilever. A metal contact is formed proximate an end of the movable cantilever. A biasing metal contact is formed adjacent the cantilever. The biasing metal contact is electrically disconnected from the metal contact.
Abstract translation: MEMS开关包括半导体衬底，可移动悬臂和悬臂锚。 半导体衬底包括器件层和手柄。 可移动悬臂形成在半导体衬底中，并且设置在手柄中的空隙上。 悬臂锚固体形成在半导体衬底中并且限定空隙的侧壁。 金属部分形成在可动悬臂的至少一部分上。 在可移动悬臂的端部附近形成金属接触。 在悬臂附近形成偏置金属接触。 偏压金属触点与金属触点电气断开。
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公开(公告)号：US20130335173A1
公开(公告)日：2013-12-19
申请号：US13907436
申请日：2013-05-31
Applicant: Purdue Research Foundation
Inventor： Dimitrios Peroulis , Akash Anand , Joshua Azariah Small , Xiaoguang Liu , Muhammad Shoaib Arif , Mihal Sinani
IPC: H01P7/06
Abstract: A tunable cavity resonator includes a housing, a post, and a controllably variable capacitive coupling. The housing defines an interior and has at least one side wall, a first end, and a second end. The post is located within the interior and extends from the first end to the second end. The post and the housing define a resonating cavity. The controllably variable capacitive coupling is disposed in the housing.
Abstract translation: 可调谐腔谐振器包括外壳，支柱和可控制的电容耦合。 壳体限定内部并且具有至少一个侧壁，第一端和第二端。 该柱位于内部并且从第一端延伸到第二端。 柱和壳体定义谐振腔。 可控制的可变电容耦合设置在壳体中。
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公开(公告)号：US12119854B2
公开(公告)日：2024-10-15
申请号：US18112604
申请日：2023-02-22
Applicant: Purdue Research Foundation
Inventor： Mohammad Abu Khater , Dimitrios Peroulis
CPC classification number: H04B1/1027 , G01R19/04
Abstract: Systems and methods for wideband RF interference detection and suppression include an open-circuit stub, a first voltage peak detector, a second voltage peak detector, an analog-to-digital converter (ADC), and a controller. The open-circuit stub is configured to receive an input signal. The first voltage peak detector is coupled at the open end of the open-circuit stub and configured to output a first voltage signal based on a portion of the input signal. The second voltage peak detector is coupled a distance away from the open end of the open-circuit stub and configured to output a second voltage signal based on the portion of the input signal. The controller is configured to generate an output control signal operable to adjust a signal filter based on the first digital voltage signal and the second digital voltage signal to suppress the portion of the input signal.
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公开(公告)号：US20220278551A1
公开(公告)日：2022-09-01
申请号：US17681819
申请日：2022-02-27
Applicant: Purdue Research Foundation
Abstract: A system is disclosed which includes a chamber, one or more transmitters configured to emit EM radiation, one or more power harvesters, one or more EM stirrer, and a processing system configured to a) receive a measure of dimensional characteristics of the chamber b) control the one or more EM stirrers, c) evaluate statistical properties of the statistical EM environment, d) set a new criterion for acceptable statistical properties of the statistical EM environment, e) measure a lowest usable frequency of the chamber below which the statistical properties are not acceptable according to a predetermined criterion, f) determine an efficiency profile of the one or more power harvesters versus frequency, g) select an operating frequency that maximizes efficiencies of the one or more power harvesters, h) measure a collective efficiency of the chamber, and i) return to step d if the measured collective efficiency is below a predetermined efficiency threshold.
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公开(公告)号：US20200076516A1
公开(公告)日：2020-03-05
申请号：US16173275
申请日：2018-10-29
Applicant: Purdue Research Foundation
Inventor： Mohammad Abu Khater , Dimitrios Peroulis
Abstract: Methods and devices suitable for monitoring the frequency of microwave tunable filters in real time. The frequency readout relies on the natural response of such a filter when excited by a pulse. Methods of measuring an operating frequency of a pole in a tunable filter include measuring a number of cycles in a natural response in the filter when the filter is excited by an electric current pulse, and determining a resonance frequency based on the number of cycles measured in the natural response. Such a method can provide the operating frequency information in a binary digital format, making it relatively easy to read and process. A measuring resonator may be mounted to the filter resonator and connected by a common actuator.
