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1. 发明授权

US11562156B2 RFID reader to determine an estimated resonant frequency of a RFID tag 有权
公开(公告)号：US11562156B2
公开(公告)日：2023-01-24
申请号：US17062602
申请日：2020-10-04
申请人： RFMicron, Inc.
发明人： Shahriar Rokhsaz
IPC分类号： G06K7/10 , G06K19/07 , G06K7/00
摘要： A method begins by a radio frequency identification (RFID) reader transmitting a first and second radio frequency (RF) signal of a plurality of RF signals, which each include a unique carrier frequency and an instruction to an RFID tag to respond with a received power level indication. The method continues by the RFID reader receiving, in response to the first and second signals sent at a first and second carrier frequency, a first and second response from the RFID tag that includes a first and second received power level indication. The method continues by the RFID reader determining an estimated resonant frequency of the RFID tag based on the first and second received power level indications and the first and second carrier frequencies.

2. 发明授权

US11356184B2 Wireless sensor with oppositely positioned antenna and sensing circuitry 有权
公开(公告)号：US11356184B2
公开(公告)日：2022-06-07
申请号：US17248497
申请日：2021-01-27
申请人： RFMicron, Inc.
发明人： Brian David Young , Shahriar Rokhsaz
IPC分类号： H04B17/00 , H04B17/10 , H04B17/20
摘要： A wireless sensor includes a radio frequency (RF) front end, a sensing element, and a processing module. The RF front end sends a coded digital value to a sensing computing device via an RF signal. The sensing element senses an environmental condition of an item. The processing module determines an effect on an operational parameter of an RF front end of the wireless sensor as a result of the sensing element sensing the environmental condition. The processing module also adjusts tuning of the RF front end to mitigate the effect on the operational parameter and equates an amount of adjusting of the tuning of the RF front end to the coded digital value.

3. 发明申请

US20220158627A1 METHOD FOR SENSING ENVIRONMENTAL CONDITIONS 有权
公开(公告)号：US20220158627A1
公开(公告)日：2022-05-19
申请号：US17580395
申请日：2022-01-20
申请人： RFMicron, Inc.
发明人： Shahriar Rokhsaz
IPC分类号： H03J3/04 , H04W4/80 , G06K7/10 , G06K19/07 , H03H7/40 , H03J3/20 , H04B5/00 , H04W4/20
摘要： A method includes receiving, by an RF receiving circuit of a passive wireless sensor of a wireless communication system, an RF signal. When a sensing element of the passive wireless sensor is exposed to an environmental condition, the method further includes affecting, by the sensing element, resonant frequency of the RF receiving circuit. The method further includes determining, by a processing module of the passive wireless sensor, a first value for an adjustable element for a known environmental condition, determining a second value for the adjustable element for an unknown environmental condition, determining a difference between the first and second values that correspond to a change, generating a coded value representative of the change, and transmitting the coded value. The method further includes receiving, by a second processing module of a sensor computing device of the wireless communication system, the coded value and determining a sensed environmental condition.

4. 发明授权

US11095337B2 Computing device for processing environmental sensed conditions 有权
公开(公告)号：US11095337B2
公开(公告)日：2021-08-17
申请号：US16894821
申请日：2020-06-07
申请人： RFMicron, Inc.
发明人： Shahriar Rokhsaz
IPC分类号： H04B7/00 , H04B1/713 , H04B17/318 , H03J3/20 , H04B5/00 , H04W4/80
摘要： A communication system includes a passive wireless sensor and a sensor computing device. The passive wireless sensor is operable to receive a radio frequency (RF) signal including a carrier frequency signal and a modulated sense request signal, generate a power supply voltage, determine received signal strength (RSSI) of the RF signal, and determine whether the RSSI is at a desired level. When the RSSI is at a desired level, the passive wireless sensor generates a response RF signal including the carrier frequency and a coded sense response signal representative of a sensed environmental condition. The sensed environmental condition affects impedance of a front-end of the passive wireless sensor to produce an affected impedance. The passive wireless sensor generates the coded sense response signal based on tuning the affected impedance to resonate with the carrier frequency signal. The computing device operable to: transmit the RF signal, receive the response RF signal, and generate an environmental condition value based on the coded sense response signal and environmental conversion information.

5. 发明授权

US11064373B2 Wireless sensor including an RF signal circuit 有权
公开(公告)号：US11064373B2
公开(公告)日：2021-07-13
申请号：US16846951
申请日：2020-04-13
申请人： RFMicron, Inc.
发明人： Shahriar Rokhsaz
IPC分类号： H04B5/00 , H04W24/02 , H04W52/02 , H04B1/40 , H03J3/20 , G06K19/07 , G06K7/10 , H04W84/18 , H04W76/14
摘要： A radio frequency identification (RFID) tag includes an antenna structure operable to receive a radio frequency (RF) signal, an RF signal circuit operable to, when enabled, produce the RF signal, a sensing element operably coupled to the antenna structure, a memory, and a processing module. When in a calibration mode, the processing module adjusts the input impedance until a measured power level is substantially equal to the desired input power level, and generates a first digital value based on the amount of the adjustment a power difference between a measured first input power level and a desired power level, and stores the first digital value in the memory, where the first digital value is representative of a known condition. In a sense mode, the processing module adjusts the input impedance until a second measured power level is substantially equal to the desired input power level, and generates a second digital value based on the amount of the adjustment a power difference between a measured first input power level and a desired power level, and the desired power level, and stores the second digital value in the memory, where the second digital value is representative of an unknown condition.

6. 发明授权

US10715209B2 Computing device for processing environmental sensed conditions 有权
公开(公告)号：US10715209B2
公开(公告)日：2020-07-14
申请号：US15217816
申请日：2016-07-22
申请人： RFMicron, Inc.
发明人： Shahriar Rokhsaz
IPC分类号： H04B7/00 , H04B1/713 , H04B17/318 , H03J3/20 , H04B5/00 , H04W4/80
摘要： A method includes a computing device transmitting a radio frequency (RF) signal to a passive wireless sensor. The RF signal includes a carrier frequency signal and a modulated sense request signal. The method further includes, in response to the modulated sense request signal, receiving, by the computing device, a response RF signal that includes the carrier frequency signal and a coded sense response signal from the passive wireless sensor. The coded sense response signal is representative of a sensed environmental condition by the passive wireless sensor. The method further includes generating, by the computing device, an environmental condition value based on the coded sense response signal and an environmental conversion information.

7. 发明申请

US20200160007A1 SENSOR WITH TAIL OR TRANSMISSION LINE FOR VEHICLE LEAK TESTING 审中-公开
公开(公告)号：US20200160007A1
公开(公告)日：2020-05-21
申请号：US16773595
申请日：2020-01-27
申请人： RFMicron, Inc.
发明人： Shahriar Rokhsaz , Brian David Young
IPC分类号： G06K7/10 , G06K19/07 , H03J3/20 , H04B5/00
摘要： A method includes sending, by a reader, a radio frequency (RF) signal to a wireless sensor that includes an antenna having a tail section and a head section. The tail section is for placement in an RF limited area for sensing moisture in a first location of a vehicle under test and wherein the head section is for placement in a non-RF limited area. The method further includes receiving, by the reader, an RF response to the RF signal from the wireless sensor. The first RF response includes an indication of adjustment of one or more RF characteristics of the wireless sensor, which corresponds to a variance of the one or more RF characteristics from a desired value, which, in turn, corresponds to a level of moisture at the first location. The method further includes outputting, by the reader, a message regarding the level of moisture at the first location.

8. 发明授权

US10546166B2 Sensor with tail or transmission line for vehicle leak testing 有权
公开(公告)号：US10546166B2
公开(公告)日：2020-01-28
申请号：US16266376
申请日：2019-02-04
申请人： RFMicron, Inc.
发明人： Shahriar Rokhsaz , Brian David Young
IPC分类号： G06K7/10 , H04B5/00 , H03J3/20 , G06K19/07
摘要： A method includes sending, by a reader, a radio frequency (RF) signal to a wireless sensor that includes an antenna having a tail section and a head section. The tail section is for placement in an RF limited area for sensing moisture in a first location of a vehicle under test and wherein the head section is for placement in a non-RF limited area. The method further includes receiving, by the reader, an RF response to the RF signal from the wireless sensor. The first RF response includes an indication of adjustment of one or more RF characteristics of the wireless sensor, which corresponds to a variance of the one or more RF characteristics from a desired value, which, in turn, corresponds to a level of moisture at the first location. The method further includes outputting, by the reader, a message regarding the level of moisture at the first location.

9. 发明申请

US20200005003A1 FLEXIBLE LABEL WITH ACTIVATING CIRCUITRY 审中-公开
公开(公告)号：US20200005003A1
公开(公告)日：2020-01-02
申请号：US16564454
申请日：2019-09-09
申请人： RFMicron, Inc.
发明人： Tanmay Zargar , Alan Wayne Hansford , Shahriar Rokhsaz
IPC分类号： G06K7/10 , G06K19/07
摘要： A label sensor that can be affixed to an item includes a first section and a second section. The first section includes a memory, an environmental sensor, a radio frequency (RF) front end that includes a tuning circuit, and a processing module. The processing module is operably coupled to the memory, the environmental sensor, and the RF front end. The second section includes an activation circuit that is operable, upon receiving an input, to activate one or more of the memory, the environmental sensor, the RF front end and the processing module. The activation causes the label sensor to be put in a first operational mode of a plurality of operational modes.

10. 发明申请

US20190334631A1 WIRELESS SENSOR WITH OPPOSITELY POSITIONED ANTENNA AND SENSING CIRCUITRY 审中-公开
公开(公告)号：US20190334631A1
公开(公告)日：2019-10-31
申请号：US16505436
申请日：2019-07-08
申请人： RFMicron, Inc.
发明人： Brian David Young , Shahriar Rokhsaz
IPC分类号： H04B17/00 , H04B17/10 , H04B17/20
摘要： A wireless sensor includes a radio frequency (RF) front end, a sensing element, and a processing module. The RF front end receives a request for sensed data from a sensing computing device and sends a coded digital value to the sensing computing device via the RF signal. The sensing element senses an environmental condition of an item. The processing module determines an effect on an operational parameter of an RF front end of the wireless sensor as a result of the sensing element sensing the environmental condition and while receiving the RF signal. The processing module also adjusts tuning of the RF front end to mitigate the effect on the operational parameter and equates an amount of adjusting of the tuning of the RF front end to a coded digital value.

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