Radio-frequency energy collection device for supplying power to wireless sensing node, and working method of wireless sensing node

A wireless sensor node, radio frequency energy technology, applied in circuit devices, electrical components, etc., can solve the problems of low power energy and inability to provide effective power supply for sensor nodes.

Active Publication Date: 2016-09-21
NINGBO MIENERGY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem that the electric energy generated by radio frequency is low and cannot provide effective power supply for sensor nodes, the present invention provides a radio frequency energy harvesting device that can output continuous and stable DC voltage

Method used

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  • Radio-frequency energy collection device for supplying power to wireless sensing node, and working method of wireless sensing node
  • Radio-frequency energy collection device for supplying power to wireless sensing node, and working method of wireless sensing node
  • Radio-frequency energy collection device for supplying power to wireless sensing node, and working method of wireless sensing node

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Embodiment 1

[0028] Such as figure 1 As shown, the wireless sensor system powered by radio frequency is composed of a radio frequency energy harvesting device and a wireless sensor node. The radio frequency energy harvesting device is used to collect radio frequency signals and convert them into a stable voltage for powering the wireless sensor nodes.

[0029] The radio frequency energy harvesting device includes a receiving antenna, a matching circuit, an RF-DC conversion circuit, a voltage monitoring unit, an energy storage unit, a voltage stabilizing circuit and a 1.2V voltage stabilizing reference source. The receiving antenna adopts a PCB antenna, which can collect 915MHz radio frequency signals; the matching circuit realizes the matching of the collected radio frequency signals; the RF-DC conversion circuit realizes the rectification of the collected radio frequency signals and converts them into DC signals. In order to realize high-efficiency energy conversion, this implementation F...

Embodiment 2

[0034] The wireless sensor nodes powered by radio frequency energy harvesting devices adopt a distributed working mode, so as to make full use of electric energy and make the wireless sensor nodes continue to work. Such as image 3 As shown, the wireless sensor node enters the dormant state immediately after starting, and initializes the wireless communication module after a 1 second of dormancy to ensure that the radio frequency energy collection and the electric energy stored in the storage unit are sufficient to support the configuration of the wireless communication module; after the initialization of the wireless communication module is completed , the wireless sensor node enters the dormancy mode again; start temperature data acquisition after dormancy for a2 seconds, and dormancy for a3 seconds after the acquisition is completed and converted into digital signals; after dormancy is completed, start the wireless communication module and send the data to the remote data pr...

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PUM

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Abstract

The invention discloses a radio-frequency energy collection device for supplying power to a wireless sensing node, and the device comprises a receiving antenna, a matching circuit, an RF-DC conversion circuit and an energy storage unit, wherein the receiving antenna, the matching circuit, the RF-DC conversion circuit and the energy storage unit are connected sequentially. The device also comprises a DC-DC voltage-stabilizing circuit, a voltage-stabilizing reference source and a voltage monitoring unit, wherein the CAP end of the DC-DC voltage-stabilizing circuit is connected with the output end of the RF-DC conversion circuit, and the output end of the DC-DC voltage-stabilizing circuit is connected with the wireless sensing node. The voltage-stabilizing reference source and the voltage monitoring unit are respectively in bridging connection between the CAP end and input end of the DC-DC voltage-stabilizing circuit. The invention also provides a distributed working method of the wireless sensing node, wherein the working mode is matched with the above device. The device can achieve the collection of radio frequency energy emitted by a radio frequency signal source within a certain spatial distance range, and the collected energy meets the requirements of the continuous working of a wireless sensor.

Description

technical field [0001] The invention relates to the technical field of power supply using radio frequency energy, in particular to a radio frequency energy acquisition device for supplying power to a wireless sensor node and a working method of the wireless sensor node. Background technique [0002] The power supply and management technology of wireless sensor network nodes is one of the key technologies of wireless sensor networks. At present, wireless sensors mainly use primary batteries, solar energy, wind energy, temperature difference or electromagnetic induction power supply. Primary batteries have battery life and replacement problems. Solar energy, wind energy, Temperature difference and electromagnetic induction power supply have power supply continuity problems, are easily affected by the environment, cannot provide stable and reliable power supply for wireless sensors, and cannot guarantee long-term, stable and reliable work of wireless sensors. [0003] Although ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J50/27
Inventor 赵飞陈远宁鲁兴伟蔡丽君郭龙飞李继双
Owner NINGBO MIENERGY TECH CO LTD
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