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公开(公告)号：US20220268653A1
公开(公告)日：2022-08-25
申请号：US17668136
申请日：2022-02-09
IPC分类号： G01L9/00
摘要： A capacitive sensor device is fabricated on a dielectric substrate. The capacitive sensor device may include multiple diaphragms that differ in shape and/or size. Each of the diaphragms is paired to upper and lower electrodes in included upper and lower electrode layers, respectively. The lower layer is on the dielectric substrate and couples the lower electrodes to a lower electrode terminal in parallel. The upper electrode layer is separated from the lower electrode layer by a gap defined by a removed sacrificial layer and couples the upper electrodes in parallel to an upper electrode terminal.
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公开(公告)号：US10794374B2
公开(公告)日：2020-10-06
申请号：US15006034
申请日：2016-01-25
发明人： Yogesh Gianchandani , Seungdo An , Yutao Qin
IPC分类号： F04B37/06 , C23C16/455 , F04B19/24 , B81C1/00 , F04B19/00
摘要： A microfabricated gas flow structure includes an array of vertical gas flow channels in a side-by-side parallel flow arrangement. Adjacent gas flow channels are separated by a thin wall having a thickness which can be an order of magnitude or more less than the channel width, offering exceptionally high area efficiency for the array. Channel walls can be formed from a dielectric material to provide the walls with sufficient integrity at nanoscale thicknesses and to provide thermal insulative properties in the lateral direction, thereby controlling power losses when the gas flow structure is employed as a Knudsen pump. The gas flow structure can be microfabricated as a monolithic structure from an SOI wafer, with the gas flow channels formed in the device layer and the heat sink formed from the handle layer.
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公开(公告)号：US10782446B2
公开(公告)日：2020-09-22
申请号：US15410724
申请日：2017-01-19
发明人： Tao Li , Yogesh Gianchandani , Yu Sui , Ryan Meredith
IPC分类号： G01V11/00
摘要： An environmental logging system that includes a housing and an electronic logging circuit sealed within the housing. The logging circuit includes an energy source, transducer, charging circuit, trigger circuit, electronic control unit (ECU), and transmitter. The energy source is charged by the charging circuit using electricity from the transducer in response to external energy applied to the transducer. Commands may also be received by the circuit via the transducer. The ECU includes a processor, memory, and one or more sensors, and it operates under power from the energy source to store data from the sensor(s). The transmitter is coupled to the ECU and transmits the data via electromagnetic radiation outside the housing. The trigger circuit supplies operating power to the processor only when the voltage level of the energy source is above a minimum threshold. The housing may be a tubular shell filled with a polymeric material.
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公开(公告)号：US20160230751A1
公开(公告)日：2016-08-11
申请号：US15006034
申请日：2016-01-25
发明人： Yogesh Gianchandani , Seungdo An , Yutao Qin
IPC分类号： F04B37/06 , C23C16/455
摘要： A microfabricated gas flow structure includes an array of vertical gas flow channels in a side-by-side parallel flow arrangement. Adjacent gas flow channels are separated by a thin wall having a thickness which can be an order of magnitude or more less than the channel width, offering exceptionally high area efficiency for the array. Channel walls can be formed from a dielectric material to provide the walls with sufficient integrity at nanoscale thicknesses and to provide thermal insulative properties in the lateral direction, thereby controlling power losses when the gas flow structure is employed as a Knudsen pump. The gas flow structure can be microfabricated as a monolithic structure from an SOI wafer, with the gas flow channels formed in the device layer and the heat sink formed from the handle layer.
摘要翻译： 微制造气流结构包括并排平行流布置的垂直气流通道阵列。 相邻的气体流动通道被薄壁分开，该薄壁的厚度可以比通道宽度小一个数量级或更多，为阵列提供了非常高的面积效率。 通道壁可以由介电材料形成，以提供具有纳米级厚度的足够完整性的壁，并且在横向方向上提供热绝缘性能，从而当采用气流结构作为克努森泵时控制功率损失。 气体流动结构可以从SOI晶片作为整体结构微制成，其中气体流动通道形成在器件层中，并且散热器由手柄层形成。
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公开(公告)号：US11083624B2
公开(公告)日：2021-08-10
申请号：US15739625
申请日：2016-06-24
摘要： An implantable actuation device that may be used with a glaucoma drainage device or attached to an ocular surface, a method of making an implantable actuation device, and a method of preventing cell adhesion resulting from a glaucoma treatment procedure. The implantable actuation device is made from a magnetoelastic material. Actuation of the magnetoelastic material may help control cellular adhesion that may develop and undesirably disrupt proper healing when recovering from invasive surgical treatments. The implantable actuation devices may have small form factors and customized geometries which include three-dimensional curvatures to help promote the actuation of liquid flow and facilitate the removal of unwanted cells.
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公开(公告)号：US10287877B2
公开(公告)日：2019-05-14
申请号：US15113180
申请日：2015-01-26
发明人： Yogesh Gianchandani , Scott Green , Kamal Sarabandi , Mazen Kanj , Howard Schmidt , Jun Tang , Jiangfeng Wu
摘要： A fracture interrogation system includes an antenna adapted for placement in a subterranean wellbore and a plurality of pseudoparticles adapted for distribution with a proppant material into hydraulic fractures along the wellbore. The presence of the pseudoparticles in the hydraulic fractures is detectable by the antenna. The pseudoparticles can include a magnetoelastic resonator having a resonant frequency. An interrogation field excites the resonators at the resonant frequency for detection by the antenna. The same or a different antenna can act as the interrogation field source, and the system can be configured to operate in a talk-and-listen mode to better separate the response signal from the interrogation signal. Electromagnetic, mechanical, or acoustic impulses can be used to excite resonators of the pseudoparticles.
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公开(公告)号：US11658638B2
公开(公告)日：2023-05-23
申请号：US17006014
申请日：2020-08-28
摘要： A resonator comprising a magnetoelastic body having a mass load portion and an active resonating portion can be used in implementations such as a security tag. The resonator includes a mass at the mass load portion of the magnetoelastic body. Displacement of the magnetoelastic body is configured to occur at both the mass load portion and the active resonating portion. A strain at the active resonating portion during displacement is configured to be greater than a strain at the mass load portion during displacement.
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公开(公告)号：US10006823B2
公开(公告)日：2018-06-26
申请号：US14899632
申请日：2014-06-20
发明人： Yogesh Gianchandani , Christine Eun , Xin Luo , Mark Kushner , Zhongmin Xiong , Jun-Chieh Wang
CPC分类号： G01L9/0072 , E21B47/06 , G01L9/0042 , G01L9/0051 , G01L9/0073
摘要： The distance between microscale electrodes can be determined from microdischarge current and/or capacitance distribution among a plurality of electrodes. A microdischarge-based pressure sensor includes a reference pair of electrodes on a body of the sensor and a sensing pair of electrodes. One of the electrodes of the sensing pair is on a diaphragm of the sensor so that the distance between the sensing pair of electrodes changes with diaphragm movement, while the distance between the reference pair does not. Plasma and current distribution within a microdischarge chamber of the sensor is sensitive to very small diaphragm deflections. Pressure sensors can be fabricated smaller than ever before, with useful signals from 50 micron diaphragms spaced only 3 microns from the sensor body. The microdischarge-based sensor is capable of operating in harsh environments and can be fabricated along-side similarly configured capacitive sensors.
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公开(公告)号：US09726557B2
公开(公告)日：2017-08-08
申请号：US14531418
申请日：2014-11-03
CPC分类号： G01L1/12 , H01L41/125
摘要： A strain sensor having an active area that includes a magnetoelastic resonator and spring configured so that the spring undergoes a greater amount of strain than the resonator when the sensor is under load. The sensor is anchored at opposite ends of the active area to a substrate for which strain is to be measured. An interrogating coil is used for wireless sensor readout. A biasing magnet may be included to provide a desired sensor response for the particular application of the sensor. The strain sensor may be implemented as a differential strain sensor that includes a second, strain-independent reference resonator.
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公开(公告)号：US20150122044A1
公开(公告)日：2015-05-07
申请号：US14531418
申请日：2014-11-03
IPC分类号： G01L1/12
CPC分类号： G01L1/12 , H01L41/125
摘要： A strain sensor having an active area that includes a magnetoelastic resonator and spring configured so that the spring undergoes a greater amount of strain than the resonator when the sensor is under load. The sensor is anchored at opposite ends of the active area to a substrate for which strain is to be measured. An interrogating coil is used for wireless sensor readout. A biasing magnet may be included to provide a desired sensor response for the particular application of the sensor. The strain sensor may be implemented as a differential strain sensor that includes a second, strain-independent reference resonator.
摘要翻译： 一种应变传感器，其具有有源区域，该有源区域包括磁弹性共振器和弹簧，所述弹性共振器和弹簧被构造成使得当传感器处于负载时弹簧经受比谐振器更大的应变量。 将传感器锚定在有源区域的相对端到要测量应变的衬底。 询问线圈用于无线传感器读出。 可以包括偏置磁体以为传感器的特定应用提供期望的传感器响应。 应变传感器可以被实现为包括第二应变非相关参考谐振器的差分应变传感器。
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