白丝美女被狂躁免费视频网站,500av导航大全精品,yw.193.cnc爆乳尤物未满,97se亚洲综合色区,аⅴ天堂中文在线网官网

Passive sensor system powered by wireless energy transmission

專利號
US10867137B2
公開日期
2020-12-15
申請人
UNIVERSIDADE DE AVEIRO; INSTITUTO DE TELECOMUNICA??ES（PT Aveiro）
發(fā)明人
Ricardo Jo?o Luís Marques Correia; Nuno Borges De Carvalho
IPC分類
G06K7/00; H04B5/00
技術(shù)領(lǐng)域
passive,sensor,energy,sensors,in,reader,data,antenna,or,by
地域： Aveiro

摘要

A passive sensor network constituted by a reader (5), wireless energy emitters (2), and fully passive sensors (1) is described. The passive sensors allow continuously the data collection and transfer thereof whenever requested by the reader, via backscatter at a frequency (4), and in parallel the reception of energy from the transmitters (3). Each sensor integrates an antenna, two impedance matching networks, a semiconductor, a microcontroller and one or more sensors that do not require the use of their own power supply or batteries. The reader (remote unit) initiates the communication process. This communication is achieved by sending radio frequency commands recognized by the passive sensors. These sensors, upon receiving the commands from the reader, initiate the back transmission of data according to the received command. The power transmitters are used to allow continuous power supply of the passive sensors.

說明書

1 2 3 4 5 6 7 8 9 10
CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a U.S. National Stage Application under 35 U.S.C. § 371 of International Patent Application No. PCT/IB2017/057660, filed Dec. 5, 2017 which claims priority to Portugal Patent Application No. 109779, filed Dec. 5, 2016, the contents of which are each hereby incorporated by reference in their respective entireties.

TECHNICAL FIELD

The present disclosure relates a network of passive sensors which communicate with the reader via backscatter and which, simultaneously, can be powered by energy emitters, allowing the continuous recording of sensor data.

BACKGROUND

Document U.S. Pat. No. 6,100,790 discloses a system using two circuits, one for data communication and the other for power reception. This system has a selective distribution for power communication or reception. The selection of which system to use is based on the power level of the radio frequency (RF) signal. Depending on the level the distribution is made to either the power reception circuit or to the data communication system.

Document U.S. Pat. No. 6,084,530 discloses a radio communication system which includes an interrogator which generates and transmits an RF signal. The system includes one or more tags, which modulate, through backscatter, the wave transmitted forming a reflected modulated wave which is subsequently demodulated in the interrogator.

權(quán)利要求

1
The invention claimed is:1. A passive node for a wireless sensor network comprising:an antenna for data communication and electromagnetic energy reception by which electrical energy for powering said node is obtained;two impedance matching networks attached to said antenna; anda data processor for receiving and/or transmitting data and arranged to be powered by the obtained electric energy;wherein said antenna and impedance matching networks are configured for two different frequencies, a first of the impedance matching networks being arranged for receiving electromagnetic energy emitted from an electromagnetic energy emitter and a second of the impedance matching networks being arranged for backscatter communication;wherein the passive node further comprises a plurality of semiconductors for modulation control of said passive node by said data processor, in balanced and out-of-phase impedance branches of said impedance matching networks attached to said antenna, respectively; andwherein said plurality of semiconductors are independently controllable by said data processor.2. The passive node according to claim 1, further comprising an additional plurality of semiconductors for modulation control of said passive node by said data processor, arranged in at least two balanced impedance stages.3. The passive node according to claim 1, further comprising a plurality of semiconductors for modulation control of said passive node by said data processor, configured to be activated at different voltages for obtaining different modulations from said semiconductors.4. The passive node according to claim 1, further comprising a voltage multiplier configured to multiply the voltage of the obtained electric energy.5. The passive node according to claim 1, wherein said node is a sensor node and comprises a transducer connected to said data processor.6. The passive node according to claim 5, wherein said transducer is a temperature, humidity, pressure transducer, or combinations thereof.7. The passive node according to claim 1, wherein the data processor is a microprocessor or a microcontroller.8. The passive node according to claim 1, wherein said antennas and networks are configured to communicate and/or receive electromagnetic energy at 2.45 GHz or at 5.8 GHz.9. A wireless sensor network, comprising:an electromagnetic energy emitter; andone or more passive nodes, each passive node comprising:an antenna for data communication and electromagnetic energy reception by which electrical energy for powering said node is obtained;two impedance matching networks attached to said antenna; anda data processor for receiving and/or transmitting data and arranged to be powered by the obtained electric energy;wherein said antenna and impedance matching networks are configured for two different frequencies, a first of the impedance matching networks being arranged for receiving electromagnetic energy emitted from the electromagnetic energy emitter and a second of the impedance matching networks being arranged for backscatter communication;wherein the passive node further comprises a plurality of semiconductors for modulation control of said passive node by said data processor, in balanced and out-of-phase impedance branches of said respective impedance matching networks attached to said antenna; andwherein said semiconductors are independently controllable by said data processor.10. The wireless sensor network according to claim 9, wherein the electromagnetic energy emitter comprises a transmitting antenna with a directed transmission profile for transmitting to said passive node or nodes.11. The wireless sensor network according to claim 9, wherein the transmitting antenna of the electromagnetic energy emitter is also a receiving antenna for data transmitted by said passive node or nodes.12. The wireless sensor network according to claim 9, wherein the electromagnetic energy emitter is configured to emit in a continuous regime, periodical regime, or in a predetermined transmission regime.13. The wireless sensor network according to claim 9, wherein each passive node comprises a unique identification in said sensor network.
微信群二維碼
意見反饋