CN109900268A - A kind of passive indoor node positioning apparatus and corresponding indoor locating system - Google Patents
A kind of passive indoor node positioning apparatus and corresponding indoor locating system Download PDFInfo
- Publication number
- CN109900268A CN109900268A CN201711283436.6A CN201711283436A CN109900268A CN 109900268 A CN109900268 A CN 109900268A CN 201711283436 A CN201711283436 A CN 201711283436A CN 109900268 A CN109900268 A CN 109900268A
- Authority
- CN
- China
- Prior art keywords
- antenna
- energy
- electromagnetic wave
- antenna array
- indoor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000003306 harvesting Methods 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 4
- 239000000969 carrier Substances 0.000 claims description 3
- 230000008878 coupling Effects 0.000 claims description 2
- 238000010168 coupling process Methods 0.000 claims description 2
- 238000005859 coupling reaction Methods 0.000 claims description 2
- 238000005516 engineering process Methods 0.000 abstract description 18
- 238000000034 method Methods 0.000 abstract description 9
- 230000007613 environmental effect Effects 0.000 abstract description 5
- 238000004891 communication Methods 0.000 abstract description 4
- 238000005265 energy consumption Methods 0.000 abstract description 4
- 238000004146 energy storage Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 9
- 239000003990 capacitor Substances 0.000 description 7
- 238000011161 development Methods 0.000 description 4
- 238000012544 monitoring process Methods 0.000 description 4
- 241000282414 Homo sapiens Species 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 230000008054 signal transmission Effects 0.000 description 2
- 230000003044 adaptive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
Landscapes
- Position Fixing By Use Of Radio Waves (AREA)
Abstract
The invention discloses a kind of passive indoor node positioning apparatus and corresponding indoor locating systems.Passive indoor node positioning apparatus in the present invention collects the electromagnetic wave signal in indoor environment by aerial array and inputs to energy collection circuit, the electromagnetic wave signal is converted into low-voltage electric energy and is stored in local energy storage for super low-power consumption micro process and antenna controller use by energy collection circuit, super low-power consumption micro process being opened and being disconnected by control antenna controller, the data locally prestored are controlled aerial array by antenna controller to launch, and use environmental electromagnetic wave backscatter communication technology, power consumption when transmitting encoded signal can greatly be reduced.The embodiment of the present invention realizes passive indoor node positioning apparatus, can pass through the electromagnetic wave signal collected in environment and be converted into electric energy needed for itself and greatly reduce the energy consumption of fixed indoor position node when transmitting signals.To greatly promote the convenience of indoor locating nodes arrangement.
Description
Technical Field
The invention relates to the field of wireless communication networks, in particular to a passive indoor positioning node device and a corresponding indoor positioning system.
Background
Sensor network technology is widely applied to the fields of military, environmental monitoring and forecasting, health care, intelligent home, building state monitoring, urban traffic, large workshop and warehouse management, safety monitoring of airports and large industrial parks and the like. The development of the internet of things has great significance to the society and economy of the whole country and even the future life style of human beings. The Internet of things industry has the characteristics of long industrial chain and multiple industry groups, and the application range of the Internet of things industry almost covers all industries.
With the application and development of the related technology based on the user location information, the location service has become a basic service requirement necessary for people to work and live in daily life, and especially in large and complex indoor environments, such as museums, airports, supermarkets, hospitals, underground mines and other areas, people have urgent needs for the location service. Under the promotion of rapid development of mobile internet and application demand of location services, the current indoor positioning technology is in a relatively rapid development stage, and researchers put forward a plurality of theories and methods of the indoor positioning technology. The positioning technology can be divided into an outdoor positioning technology and an indoor positioning technology, and under an outdoor environment, global navigation satellite systems such as a global positioning system, a Beidou positioning system and the like provide meter-level position service for users, so that the problem of accurate positioning in outdoor space is basically solved, and the positioning technology is widely applied to daily life. However, in an indoor environment which accounts for 80% of the daily life time of human beings, due to the influence of shielding and multipath effects of buildings, the positioning accuracy of a global navigation satellite system is sharply reduced, and the indoor position service requirement cannot be met, but the urgent need of indoor positioning in some specific occasions is increasingly remarkable, and the indoor positioning technology is rapidly developed. At present, researchers at home and abroad propose indoor positioning technologies and application systems such as Bluetooth, infrared rays, RFID, WLAN, ultra-wideband, ultrasonic waves and the like, but different indoor positioning technologies have certain application limitations according to positioning performance, and no general adaptive technology can meet the requirements of all indoor positioning services at present.
In indoor positioning technologies and application systems such as bluetooth, infrared, RF id, WLAN, ultra wide band, and ultrasonic, the transmitting node devices need to be powered by batteries or external power sources. If an external power supply is adopted, complicated power line arrangement is involved; if the battery is adopted for power supply, the battery of the indoor positioning node needs to be replaced in time. The arrangement number of indoor positioning nodes and the convenience of installation and maintenance are greatly limited.
Disclosure of Invention
The embodiment of the invention discloses a passive indoor positioning node device and a corresponding indoor positioning system, which realize the passive indoor positioning node device, can not only collect electromagnetic wave signals in the environment and convert the electromagnetic wave signals into electric energy required by the passive indoor positioning node device, but also greatly reduce the energy consumption of the indoor positioning node when the passive indoor positioning node device transmits signals. Thereby greatly improving the convenience of indoor positioning node arrangement.
The first aspect of the embodiments of the present invention discloses a passive indoor positioning node device, including:
the system comprises an antenna array, an energy collecting circuit and an antenna controller which are connected with the antenna array, and an ultra-low power consumption microprocessor which is respectively connected with the energy collecting circuit and the antenna controller; wherein,
the antenna array receives electromagnetic wave signals in an indoor environment and inputs the electromagnetic wave signals to the energy collecting circuit; the energy collection circuit converts the electromagnetic wave energy carried by the electromagnetic wave signal into a power supply to provide electric energy for the ultra-low power consumption microprocessor and the antenna controller; the ultra-low power consumption microprocessor controls the antenna array to emit local pre-stored data through the antenna controller by controlling the on and off of the antenna controller.
Furthermore, the antenna array transmits the pre-stored data by adopting an ambient electromagnetic wave backscattering technology.
Further, the antenna array is a special antenna made of a material with a high dielectric constant.
Further, the antenna array is arranged in an array mode.
Further, the energy collecting circuit comprises an antenna matching circuit and a boosting energy management circuit; wherein,
the antenna matching circuit is used for adjusting matching with antenna impedance in the antenna array, fully coupling radio frequency signals received by the antenna array, rectifying the radio frequency signals, converting the radio frequency signals into low-voltage direct current and storing the low-voltage direct current;
the boost energy management circuit is used for converting the low-voltage direct current converted by the antenna matching circuit into a higher-voltage direct current which can be used by the ultra-low power consumption microprocessor and the antenna controller.
Furthermore, the boost energy management circuit is also used for monitoring the energy of the node device, storing and releasing the energy according to a preset strategy, and meeting the energy requirement of the node device.
Further, the ultra-low power consumption microprocessor controls 2 control terminals for controlling the antenna array impedance matching in the antenna controller through 2 IO ports.
Further, the transmitting the pre-stored data by the antenna array using the ambient electromagnetic wave backscattering technology specifically includes:
2 control ends used for controlling the antenna array impedance matching in the antenna controller reflect electromagnetic wave signals in indoor environment through impedance matching, and pre-stored data are transmitted out through the antenna array by taking the electromagnetic wave signals as carriers.
A second aspect of the present invention discloses an indoor positioning system, including a plurality of passive indoor positioning node devices disclosed in the first aspect of the present invention.
Compared with the prior art, the embodiment of the invention has the following beneficial effects:
in the embodiment of the invention, the indoor positioning node device collects electromagnetic wave signals in an indoor environment through the antenna array and inputs the electromagnetic wave signals to the energy collecting circuit, the energy collecting circuit converts the electromagnetic wave signals into low-voltage electric energy to be stored in the local energy storage device for the ultra-low power consumption microprocessing and the antenna controller to use, the ultra-low power consumption microprocessing controls the antenna controller to be switched on and off, and locally pre-stored data are transmitted out through the antenna controller to control the antenna array, and the environment electromagnetic wave backscattering communication technology is adopted, so that the power consumption when the coded signals are transmitted can be greatly reduced. The whole system is maintained in a working state below tens of nano watts, and the energy of the environmental electromagnetic waves is also maintained to continuously work; the indoor positioning node device disclosed in the embodiment of the invention replaces the indoor positioning node device in the prior art, so that the passive indoor positioning node device is realized, electromagnetic wave signals in the environment can be collected and converted into electric energy required by the indoor positioning node device, and the energy consumption of the indoor positioning node in the fixed room during signal transmission can be greatly reduced. Thereby greatly improving the convenience of indoor positioning node arrangement.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic logical structure diagram of a passive indoor positioning node apparatus according to an embodiment of the present invention;
fig. 2 is a diagram of the size of a single antenna in a passive indoor positioning node device according to an embodiment of the present invention;
fig. 3 is a schematic diagram of an antenna array in a passive indoor positioning node device according to an embodiment of the present invention;
FIG. 4 is an antenna matching circuit in an energy harvesting circuit in an embodiment of the present invention;
FIG. 5 is a boost energy management circuit in the energy harvesting circuit in an embodiment of the present invention;
FIG. 6 is a schematic diagram of an ultra low power microprocessor and an antenna controller according to an embodiment of the present invention;
fig. 7 is a schematic logical structure diagram of an indoor positioning system according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the terms "comprises" and "comprising," and any variations thereof, of embodiments of the present invention are intended to cover non-exclusive inclusions, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
The embodiment of the invention discloses a passive indoor positioning node device, which realizes passive work of indoor positioning nodes, so that the indoor positioning nodes are more convenient to arrange. The following detailed description is made with reference to the accompanying drawings.
Example one
Referring to fig. 1, fig. 1 is a schematic diagram of a logic structure of a passive indoor positioning node device according to an embodiment of the present invention. As shown in fig. 1, the passive indoor positioning node apparatus includes:
the antenna array 101 is used for receiving electromagnetic wave signals in an indoor environment, inputting the electromagnetic wave signals to the energy collecting circuit 102, and transmitting data to be transmitted when the connection with the antenna controller 104 is opened;
the energy collection circuit 102 is used for receiving the electromagnetic wave signals input by the antenna array 101, and then converting the electromagnetic wave energy carried by the electromagnetic wave signals into a power supply to provide electric energy for the ultra-low power consumption microprocessor 103 and the antenna controller 104;
the ultra-low power consumption microprocessor 103, the effective data such as the node ID is pre-stored locally in the ultra-low power consumption microprocessor 103, and the ultra-low power consumption microprocessor 103 controls the antenna array 101 to emit the locally pre-stored data through the antenna controller 104 by controlling the switching on and off of the antenna controller 104. The ultra-low power consumption microprocessor 103 adopts a TI MSP430L092 microprocessor, the working voltage of the microprocessor can be as low as 0.9V, the power consumption in normal working and standby states is greatly reduced, and the working stability, reliability and continuity of the system are improved.
The antenna controller 104 controls the antenna array 101 by opening and disconnecting the connection with the antenna array 101, and when the connection is opened, the antenna array transmits data to be transmitted; when disconnected, the antenna array receives electromagnetic wave signals in the indoor environment and inputs them to the energy harvesting circuitry 102. The antenna controller 104 adopts a radio frequency switch SKYA21001 of Skyworks company, and the chip has better performance characteristics and lower working voltage and can be just fully matched with a microprocessor, so that the power consumption level of the whole node device is reduced.
Furthermore, the antenna array 101 is made of a material with a high dielectric constant, and is combined in a 4x4 antenna array mode, so that the efficiency of receiving energy by the antenna can be effectively improved, the reflection of the environmental electromagnetic wave energy is facilitated, and the transmission distance of the transmitted coded data is increased; as shown in fig. 3, the antenna array 101 is made of FR4 material with a dielectric constant of 3.5, has a thickness of 1.6mm, and is a trial sample after simulation, and has a good directional characteristic and a high antenna gain level, and the gain of the antenna can reach 17 dBi; fig. 2 is a diagram of the size of a single antenna in the antenna array 101, and the size data is a preferred size after multiple experimental verifications, which is not limited herein.
Further, the energy collection circuit 102 comprises an antenna matching circuit and a boost energy management circuit, so that the antenna can fully collect 2.4GHz electromagnetic wave energy mainly comprising WiFi signals in the indoor space; and rectifies the electromagnetic wave energy into a dc packet and stores it in a capacitor. Wherein:
as shown in fig. 4, fig. 4 is an antenna matching circuit in the energy harvesting circuit 102, in the circuit in fig. 4, matching with antenna impedance in an antenna array is adjusted by adjusting the size of the resistor R11, and specifically, matching characteristics between the energy harvesting circuit 102 and an antenna can be effectively improved by adjusting the inductor L11, the inductor L14, the capacitor C11, the capacitor C14, the capacitor C15, and the capacitor C16, so as to ensure optimal matching between the antenna impedance and the energy harvesting circuit 102; the radio frequency signal received by the antenna is fully coupled, and the radio frequency signal is rectified into low-voltage direct current through the transistor D11 and the transistor D12 and stored in the capacitor C12 and the capacitor C13.
As shown in fig. 5, fig. 5 is a boost energy management circuit in the energy harvesting circuit 102, in the circuit of fig. 5, the boost energy management circuit converts the low-voltage dc converted by the antenna matching circuit into a higher voltage that can be used by a subsequent device; the boosting energy management circuit monitors the energy of the whole indoor positioning node device, stores and releases the energy according to a set strategy, and meets the energy requirement of the system. The boost and energy management circuit may be designed using a BQ25570 chip for TI.
Further, referring to fig. 6, fig. 6 is a schematic diagram of an ultra-low power consumption microprocessor and an antenna controller. The ultra-low power consumption microprocessor 103 controls 2 control ends of the antenna controller through 2 IO ports, the 2 control ends of the antenna controller are used for controlling the impedance matching of the antenna array, and the electromagnetic wave signals in the environment are reflected through the impedance matching and serve as carriers to transmit effective data to complete a data transmission function. Specifically, in fig. 6, the No. 1 IO port and the No. 2 IO port of the ultra-low power consumption microprocessor are connected to the No. 4 control terminal and the No. 6 control terminal of the antenna controller, respectively. In the implementation, the ultra-low power microprocessor may adopt other IO ports, which is not limited herein.
In the embodiment of the invention, the indoor positioning node device converts electromagnetic wave signals in the indoor environment of the mobile phone through the antenna array and inputs the electromagnetic wave signals to the energy collecting circuit, the energy collecting circuit converts the electromagnetic wave signals into low-voltage electric energy to be stored in the local energy storage for the ultra-low power consumption microprocessing and the antenna controller to use, the ultra-low power consumption microprocessing controls the antenna controller to be switched on and off, the locally pre-stored data is transmitted out through the antenna controller to control the antenna array, and the environment electromagnetic wave backscattering communication technology is adopted, so that the power consumption when the coded signals are transmitted can be greatly reduced. The whole system is maintained in a working state below tens of nano watts, and the energy of the environmental electromagnetic waves is also maintained to continuously work; the indoor positioning node device disclosed in the embodiment of the invention replaces the indoor positioning node device in the prior art, so that the passive indoor positioning node device is realized, electromagnetic wave signals in the environment can be collected and converted into electric energy required by the indoor positioning node device, and the energy consumption of the indoor positioning node in the fixed room during signal transmission can be greatly reduced. Thereby greatly improving the convenience of indoor positioning node arrangement.
Example two
Referring to fig. 7, fig. 7 is a schematic diagram of a logic structure of an indoor positioning system according to an embodiment of the present invention. In this embodiment, the indoor positioning system includes a plurality of passive indoor positioning node devices as described in the first embodiment. The indoor positioning node device in the system can be randomly arranged according to indoor specific conditions, and is very convenient.
It will be understood by those skilled in the art that all or part of the steps in the methods of the embodiments described above may be implemented by instructions associated with a program, which may be stored in a computer-readable storage medium, where the storage medium includes Read-Only Memory (ROM), Random Access Memory (RAM), Programmable Read-Only Memory (PROM), Erasable Programmable Read-Only Memory (EPROM), One-time Programmable Read-Only Memory (OTPROM), Electrically Erasable Programmable Read-Only Memory (EEPROM), compact disc-Read-Only Memory (CD-ROM), or other Memory, magnetic disk, magnetic tape, or magnetic tape, Or any other medium which can be used to carry or store data and which can be read by a computer.
The above detailed description is made on a passive indoor positioning node device disclosed in the embodiments of the present invention, and a specific example is applied in the description to explain the principle and the implementation of the present invention, and the description of the above embodiments is only used to help understanding the method and the core idea of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.
Claims (9)
1. A passive indoor positioning node apparatus, comprising:
the system comprises an antenna array, an energy collecting circuit and an antenna controller which are connected with the antenna array, and an ultra-low power consumption microprocessor which is respectively connected with the energy collecting circuit and the antenna controller; wherein,
the antenna array receives electromagnetic wave signals in an indoor environment and inputs the electromagnetic wave signals to the energy collecting circuit; the energy collection circuit converts the electromagnetic wave energy carried by the electromagnetic wave signal into a power supply to provide electric energy for the ultra-low power consumption microprocessor and the antenna controller; the ultra-low power consumption microprocessor controls the antenna array to emit local pre-stored data through the antenna controller by controlling the on and off of the antenna controller.
2. The apparatus of claim 1, wherein said antenna array employs ambient electromagnetic wave backscattering to transmit said pre-stored data.
3. The apparatus of claim 1, wherein the antenna array is a dedicated antenna made of a high dielectric constant material.
4. The apparatus of claim 1, wherein the antenna array is arranged in an array.
5. The apparatus of claim 1, wherein the energy harvesting circuit comprises an antenna matching circuit and a boost energy management circuit; wherein,
the antenna matching circuit is used for adjusting matching with antenna impedance in the antenna array, fully coupling radio frequency signals received by the antenna array, rectifying the radio frequency signals, converting the radio frequency signals into low-voltage direct current and storing the low-voltage direct current;
the boost energy management circuit is used for converting the low-voltage direct current converted by the antenna matching circuit into a higher-voltage direct current which can be used by the ultra-low power consumption microprocessor and the antenna controller.
6. The apparatus of claim 5, wherein the boost energy management circuit is further configured to monitor energy of the node apparatus, and store and release energy according to a predetermined policy to meet energy requirements of the node apparatus.
7. The apparatus of claim 2, wherein the ultra-low power microprocessor controls 2 control terminals for controlling antenna array impedance matching in the antenna controller through 2 IO ports.
8. The apparatus of claim 7, wherein the antenna array transmits the pre-stored data using ambient electromagnetic wave backscattering is specifically:
2 control ends used for controlling the antenna array impedance matching in the antenna controller reflect electromagnetic wave signals in indoor environment through impedance matching, and pre-stored data are transmitted out through the antenna array by taking the electromagnetic wave signals as carriers.
9. An indoor positioning system comprising a plurality of passive indoor positioning node arrangements as claimed in claims 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711283436.6A CN109900268A (en) | 2017-12-07 | 2017-12-07 | A kind of passive indoor node positioning apparatus and corresponding indoor locating system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711283436.6A CN109900268A (en) | 2017-12-07 | 2017-12-07 | A kind of passive indoor node positioning apparatus and corresponding indoor locating system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109900268A true CN109900268A (en) | 2019-06-18 |
Family
ID=66938928
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711283436.6A Pending CN109900268A (en) | 2017-12-07 | 2017-12-07 | A kind of passive indoor node positioning apparatus and corresponding indoor locating system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109900268A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112055337A (en) * | 2020-09-04 | 2020-12-08 | 深圳职业技术学院 | Environment self-adaptive terminal working mode adjusting method in Internet of things |
| CN113345185A (en) * | 2021-04-12 | 2021-09-03 | 中国地质大学（武汉） | Passive door and window alarm device based on LoRa scattering communication method |
| CN114386539A (en) * | 2020-10-20 | 2022-04-22 | Oppo广东移动通信有限公司 | Zero-power-consumption node equipment, working method and zero-power-consumption system |
| WO2023044779A1 (en) * | 2021-09-24 | 2023-03-30 | Oppo广东移动通信有限公司 | Wireless communication method, and device |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130265140A1 (en) * | 2012-04-05 | 2013-10-10 | Ken Gudan | Low power radio frequency communication |
| CN103366536A (en) * | 2013-06-24 | 2013-10-23 | 国家电网公司 | On-line power switch cabinet monitoring system and monitoring method thereof |
| US20150091706A1 (en) * | 2013-09-30 | 2015-04-02 | Sergey Chemishkian | Real-time wireless power transfer control for passive backscattering devices |
| US20160196455A1 (en) * | 2015-01-02 | 2016-07-07 | Kenneth Gudan | Computational bluetooth tag with backscatter |
| US20160261031A1 (en) * | 2014-03-10 | 2016-09-08 | Drexel University | Wearable Power Harvesting System |
| CN106017574A (en) * | 2016-07-26 | 2016-10-12 | 成都布阿泽科技有限公司 | Energy collection based structural body health monitoring system and method |
| CN106787260A (en) * | 2016-12-12 | 2017-05-31 | 太原理工大学 | A kind of RF energy collection system of three frequency ranges based on WISP |
| CN107209869A (en) * | 2014-12-02 | 2017-09-26 | 泰科消防及安全有限公司 | Passive RFID tags with the integrated circuit using subthreshold value technology |
| CN206542257U (en) * | 2017-01-16 | 2017-10-03 | 苏州优函信息科技有限公司 | Passive flexible retainer and positioning clothes |
-
2017
- 2017-12-07 CN CN201711283436.6A patent/CN109900268A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130265140A1 (en) * | 2012-04-05 | 2013-10-10 | Ken Gudan | Low power radio frequency communication |
| CN103366536A (en) * | 2013-06-24 | 2013-10-23 | 国家电网公司 | On-line power switch cabinet monitoring system and monitoring method thereof |
| US20150091706A1 (en) * | 2013-09-30 | 2015-04-02 | Sergey Chemishkian | Real-time wireless power transfer control for passive backscattering devices |
| US20160261031A1 (en) * | 2014-03-10 | 2016-09-08 | Drexel University | Wearable Power Harvesting System |
| CN107209869A (en) * | 2014-12-02 | 2017-09-26 | 泰科消防及安全有限公司 | Passive RFID tags with the integrated circuit using subthreshold value technology |
| US20160196455A1 (en) * | 2015-01-02 | 2016-07-07 | Kenneth Gudan | Computational bluetooth tag with backscatter |
| CN106017574A (en) * | 2016-07-26 | 2016-10-12 | 成都布阿泽科技有限公司 | Energy collection based structural body health monitoring system and method |
| CN106787260A (en) * | 2016-12-12 | 2017-05-31 | 太原理工大学 | A kind of RF energy collection system of three frequency ranges based on WISP |
| CN206542257U (en) * | 2017-01-16 | 2017-10-03 | 苏州优函信息科技有限公司 | Passive flexible retainer and positioning clothes |
Non-Patent Citations (1)
| Title |
|---|
| 袁鼎峰 等: ""一种高效率的射频能量收集器"", 《江苏科技大学（自然科学版）》 * |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112055337A (en) * | 2020-09-04 | 2020-12-08 | 深圳职业技术学院 | Environment self-adaptive terminal working mode adjusting method in Internet of things |
| CN112055337B (en) * | 2020-09-04 | 2023-01-17 | 深圳职业技术学院 | Environment self-adaptive terminal working mode adjusting method in Internet of things |
| CN114386539A (en) * | 2020-10-20 | 2022-04-22 | Oppo广东移动通信有限公司 | Zero-power-consumption node equipment, working method and zero-power-consumption system |
| CN114386539B (en) * | 2020-10-20 | 2024-03-08 | Oppo广东移动通信有限公司 | Zero-power-consumption node equipment, working method and zero-power-consumption system |
| CN113345185A (en) * | 2021-04-12 | 2021-09-03 | 中国地质大学（武汉） | Passive door and window alarm device based on LoRa scattering communication method |
| CN113345185B (en) * | 2021-04-12 | 2022-08-30 | 中国地质大学（武汉） | Passive door and window alarm device based on LoRa scattering communication method |
| WO2023044779A1 (en) * | 2021-09-24 | 2023-03-30 | Oppo广东移动通信有限公司 | Wireless communication method, and device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109900268A (en) | A kind of passive indoor node positioning apparatus and corresponding indoor locating system | |
| Loubet et al. | Implementation of a battery-free wireless sensor for cyber-physical systems dedicated to structural health monitoring applications | |
| Olgun et al. | Design of an efficient ambient WiFi energy harvesting system | |
| Visser et al. | RF energy harvesting and transport for wireless sensor network applications: Principles and requirements | |
| US7400253B2 (en) | Harvesting ambient radio frequency electromagnetic energy for powering wireless electronic devices, sensors and sensor networks and applications thereof | |
| CN101868927A (en) | Near field radio frequency communication system | |
| CN207219045U (en) | A kind of positional information acquisition terminal and system based on LoRa technologies | |
| Olgun et al. | Efficient ambient WiFi energy harvesting technology and its applications | |
| Kadir et al. | Indoor WiFi energy harvester with multiple antenna for low-power wireless applications | |
| CN107196365A (en) | A kind of multi-load intelligent radio charging device and method | |
| CN105517304A (en) | Bluetooth network based illumination control system | |
| Fezai et al. | Multidirectional receiving system for RF to DC conversion signal: Application to home automation devices | |
| Indra et al. | Radio frequency identification (RFID) item finder using radio frequency energy harvesting | |
| Ajmal et al. | Design of a compact RF energy harvester for wireless sensor networks | |
| Buyle et al. | A multi-band solution for interacting with energy-neutral devices | |
| Popovic | Far-field wireless power delivery and power management for low-power sensors | |
| KR101809711B1 (en) | Mobile communication device having RF wireless power transfer system including directional antenna | |
| CN103580294A (en) | Module for converting radio waves into electric energy and low-power electronic device and method utilizing the module | |
| CN102622810A (en) | Global-function one-card control system | |
| Uko et al. | Hybrid Wireless RF-Perovskite Photovoltaic Energy Harvester Design Consideration for Low-Power Internet of Things | |
| CN103218642A (en) | Multi-antenna ultrahigh frequency electronic tag reader | |
| CN209861233U (en) | Underground power-saving control system based on wireless radio frequency technology | |
| CN102136054A (en) | Animal electronic tag reading equipment | |
| D'Souza et al. | A wireless sensor node architecture using remote power charging, for interaction applications | |
| Bevacqua et al. | Field focusing for energy harvesting applications in smart RFID tag |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190618 |
|
| RJ01 | Rejection of invention patent application after publication |