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11.发明授权Radio frequency identification (RFID) moisture tag(s) and sensors with extended sensing via capillaries 有权射频识别（RFID）湿度标签和传感器，通过毛细管进行扩展感测公开(公告)号：US09582981B2
公开(公告)日：2017-02-28
申请号：US14879088
申请日：2015-10-08
申请人： RFMICRON, INC.
CPC分类号： H01Q9/0442 , A61B5/6808 , A61B5/7495 , A61F13/42 , A61F2013/424 , G01N27/048 , G01N27/225 , G06K19/0717 , G06K19/0775 , G08B21/20
摘要： Embodiments of the present invention provide a passive radio frequency identification (RFID) moisture sensor. This moisture sensor includes one or more antenna structures having a tail. The tail is operable to transport a disturbance such as, but not limited to fluid or moisture from a monitored location wherein the antenna has an impedance and varies with proximity to the disturbance. An integrated circuit couples to the antenna structure. This IC includes a power harvesting module operable to energize the integrated circuit, an impedance-matching engine coupled to the antenna, a memory module, and a wireless communication module. The impedance-matching engine may vary a reactive component to reduce a mismatch between the antenna impedance and the IC and produce an impedance value (sensor code) representative of the reactive component impedance. The memory module stores the impedance value (sensor code) until the wireless communication module communicates with an RFID reader and sends the impedance value/sensor code to the RFID reader. The RFID reader may then determine an environmental condition such as the presence of moisture or fluids at the tail of the RFID sensor. This sensor may deploy several antenna and/or tails sensitive to unique disturbances. These tails may be used to monitor different locations as well as different types of fluids. In one particular embodiment, the disturbance is a fluid or moisture within the gutter of a vehicle body.
摘要翻译： 本发明的实施例提供一种无源射频识别（RFID）水分传感器。 该湿度传感器包括具有尾部的一个或多个天线结构。 尾部可操作地传输干扰，例如但不限于来自监测位置的流体或湿气，其中天线具有阻抗并随着扰动的接近而变化。 集成电路耦合到天线结构。 该IC包括可操作以对集成电路通电的功率收集模块，耦合到天线的阻抗匹配引擎，存储器模块和无线通信模块。 阻抗匹配引擎可以改变电抗分量以减少天线阻抗和IC之间的失配，并产生代表无功分量阻抗的阻抗值（传感器代码）。 存储器模块存储阻抗值（传感器代码），直到无线通信模块与RFID读取器通信，并将阻抗值/传感器代码发送到RFID读取器。 然后，RFID读取器可以确定环境条件，例如在RFID传感器的尾部存在湿气或流体。 该传感器可以部署几个对独特干扰敏感的天线和/或尾部。 这些尾巴可用于监测不同位置以及不同类型的流体。 在一个具体实施例中，扰动是车体的沟槽内的流体或水分。
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公开(公告)号：US20160257173A1
公开(公告)日：2016-09-08
申请号：US15157723
申请日：2016-05-18
申请人： RFMicron, Inc.
CPC分类号： H04B5/0031 , B60C23/0413 , B60C23/0474 , H02J50/00 , H04B5/0062 , H04W84/18
摘要： A wireless sensor includes an antenna, a tuning circuit, a pressure sensing circuit, a processing module, and a transmitter. Collectively, the pressure sensing circuit, the antenna, and the tuning circuit have one or more radio frequency (RF) characteristics and the pressure sensing circuit causes the RF characteristic(s) to vary with varying sensed pressures. The processing module detects a variance of the RF characteristic(s) from a desired value. In response to the detecting of the variance, the processing module adjusts the tuning circuit to substantially re-establish the desired value of the RF characteristic(s). The processing module generates a message regarding the adjusting of the tuning circuit, wherein a level of the adjusting is representative of a variance of pressure sensed by the pressure sensing circuit. The transmitter transmits the message.
摘要翻译： 无线传感器包括天线，调谐电路，压力感测电路，处理模块和发射机。 总之，压力感测电路，天线和调谐电路具有一个或多个射频（RF）特性，并且压力感测电路使RF特性随变化的感测压力而变化。 处理模块检测RF特性与期望值的差异。 响应于方差的检测，处理模块调整调谐电路以基本上重新建立RF特性的期望值。 处理模块产生关于调谐电路的调整的消息，其中调节的水平代表由压力感测电路感测的压力的变化。 发射机发送消息。
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公开(公告)号：US20180040939A1
公开(公告)日：2018-02-08
申请号：US15686994
申请日：2017-08-25
申请人： RFMicron, Inc.
发明人： Shahriar Rokhsaz , Brian David Young , Ahmed Younis , John J. Paulos , Abhay Misra , Benjamin Cooke , Marwan Hassoun
IPC分类号： H01Q1/22 , G06K19/077
CPC分类号： H01Q1/2225 , G06K7/10148 , G06K7/10326 , G06K19/0716 , G06K19/0717 , G06K19/0726 , G06K19/07788 , H01Q5/335
摘要： A method begins by a first radio frequency identification (RFID) sensor, that is associated with a first object element, receiving a first data request signal from an RFID reader and sending a first radio frequency (RF) signal that includes first data to the RFID reader in response to the first data request signal. The method continues with a second RFID sensor receiving a second data request signal from, and sending second data to, the RFID reader. The method continues with the RFID reader sending a representation of the first and second data to a data processing unit, which processes the representation of the first and second data to determine a first and second data point regarding first and second object elements. The method continues by the data processing unit processing the first and second data points to determine an environmental relationship between the first and second object elements.
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14.发明申请公开(公告)号：US20170214142A1
公开(公告)日：2017-07-27
申请号：US15443050
申请日：2017-02-27
申请人： RFMicron, Inc.
CPC分类号： H01Q9/0442 , A61B5/6808 , A61B5/7495 , A61F13/42 , A61F2013/424 , G01N27/048 , G01N27/225 , G06K19/0717 , G06K19/0775 , G08B21/20
摘要： A wireless sensor includes environment sensing structure, a radio frequency (RF) front-end, and a processing module. When the wireless sensor is positioned proximal to an object, a portion of the environment sensing structure senses an environmental condition in a remote area of the object that effects a characteristic of the RF front-end. The processing module generates a reference value representative of a known environmental condition in the remote area based on the effect on the characteristic of the RF front-end. The processing module generates a sensed value representative of an unknown environmental condition in the remote area based on the effect on the characteristic of the RF front-end when the environment sensing structure is sensing the unknown environmental condition. The processing module transmits, via the RF front-end, at least one of the reference value, the sensed value, or a difference between the reference value and the sensed value.
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公开(公告)号：US09607188B2
公开(公告)日：2017-03-28
申请号：US14869940
申请日：2015-09-29
申请人： RFMicron, Inc.
发明人： Shahriar Rokhsaz , Brian David Young , Ahmed Younis , John J. Paulos , Abhay Misra , Benjamin Cooke , Marwan Hassoun
CPC分类号： H01Q1/2225 , G06K7/10148 , G06K7/10326 , G06K19/0716 , G06K19/0717 , G06K19/0726 , G06K19/07788 , H01Q5/335
摘要： A passive radio frequency identification (RFID) sensor is provided. This passive RFID sensor includes at least one antenna, at least one processing module, and a wireless communication module. The at least one antenna has an impedance that may vary with an environment in which the sensor is placed. Additionally, the antenna impedance might be permanently changed in response to an environmental variation or an event. The at least one processing module couples to the antenna and has a tuning module that may vary a reactive component impedance coupled to the antenna in order to change a system impedance. The system impedance includes both the antenna impedance and the reactive component impedance. The tuning module then produces an impedance value representative of the reactive component impedance. A memory module may store the impedance value which may then later be communicated to an RFID reader via the wireless communication module. The RFID reader may then exchange the impedance value representative of the reactive components of impedance with the RFID reader such that the RFID reader or another external processing unit may process the impedance value in order to determine environmental conditions at the inductive loop. These environmental conditions may include but are not limited to temperature, humidity, wetness, or proximity of the RFID reader to the passive RFID sensor.
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16.发明公开公开(公告)号：US20240178568A1
公开(公告)日：2024-05-30
申请号：US18388895
申请日：2023-11-13
申请人： RFMicron, Inc.
CPC分类号： H01Q9/0442 , H01Q9/04 , G06K19/0717 , G08B21/20
摘要： A radio frequency identification (RFID) tag includes a power harvesting circuit that operates generate power for the RFID tag from a continuous wave of a radio frequency (RF) signal. The RFID tag further includes a tuning circuit that is tuned based on a capacitance setting, where the capacitance setting is indicative of a power level of the power. The RFID tag further includes a processing module operably coupled to the tuning circuit, where the processing module operates to generate the capacitance setting to obtain a desired power level for the power.
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17.发明申请公开(公告)号：US20220109240A1
公开(公告)日：2022-04-07
申请号：US17555244
申请日：2021-12-17
申请人： RFMicron, Inc.
IPC分类号： H01Q9/04
摘要： A radio frequency identification (RFID) tag includes a power harvesting circuit that operates generate power for the RFID tag from a continuous wave of a radio frequency (RF) signal. The RFID tag further includes a tuning circuit that is tuned based on a capacitance setting, where the capacitance setting is indicative of a power level of the power. The RFID tag further includes a processing module operably coupled to the tuning circuit, where the processing module operates to generate the capacitance setting to obtain a desired power level for the power.
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18.发明授权公开(公告)号：US11205851B2
公开(公告)日：2021-12-21
申请号：US16945132
申请日：2020-07-31
申请人： RFMicron, Inc.
摘要： A radio frequency identification (RFID) tag includes a power harvesting circuit that operates generate power for the RFID tag from a continuous wave of a radio frequency (RF) signal. The RFID tag further includes a tuning circuit that is tuned based on a capacitance setting, where the capacitance setting is indicative of a power level of the power. The RFID tag further includes a processing module operably coupled to the tuning circuit, where the processing module operates to generate the capacitance setting to obtain a desired power level for the power.
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19.发明授权公开(公告)号：US10069205B2
公开(公告)日：2018-09-04
申请号：US15443050
申请日：2017-02-27
申请人： RFMicron, Inc.
摘要： A wireless sensor includes environment sensing structure, a radio frequency (RF) front-end, and a processing module. When the wireless sensor is positioned proximal to an object, a portion of the environment sensing structure senses an environmental condition in a remote area of the object that effects a characteristic of the RF front-end. The processing module generates a reference value representative of a known environmental condition in the remote area based on the effect on the characteristic of the RF front-end. The processing module generates a sensed value representative of an unknown environmental condition in the remote area based on the effect on the characteristic of the RF front-end when the environment sensing structure is sensing the unknown environmental condition. The processing module transmits, via the RF front-end, at least one of the reference value, the sensed value, or a difference between the reference value and the sensed value.
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公开(公告)号：US09768707B2
公开(公告)日：2017-09-19
申请号：US15154510
申请日：2016-05-13
申请人： RFMicron, Inc.
CPC分类号： H02M7/06 , H02M2001/0006
摘要： A power harvesting circuit, a rectifier circuit and a capacitor. The rectifier circuit includes a diode circuit, a diode voltage reduction circuit, and a start up current circuit. The diode circuit passes a current when a received RF signal has a first polarity and to substantially blocks the current when the received RF signal has a second polarity. The diode voltage reduction circuit is operably coupled to reduce a voltage drop of the diode circuit. The start up current circuit operably coupled to reduce the start up current of the diode voltage reduction circuit and/or the diode circuit. The capacitor is operably coupled to convert the rectified signal into a DC supply voltage.
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