Device and method for intelligently supplying power to node based on wireless sensor network

A wireless sensor and intelligent power supply technology, applied in energy-saving ICT, electrical components, energy storage, etc., can solve the problems of increasing circuit energy consumption and operating costs, lack of energy management and control steps, and inefficient use of solar energy, etc., to provide Safety and reliability, work efficiency, reduced maintenance probability, and reduced energy consumption

Inactive Publication Date: 2011-01-19
CHINA AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In addition, many mature solar-powered devices that are currently formed are not specifically designed for wireless sensor network nodes.
Moreover, the traditional solar power supply device has the following three disadvantages for the application of low-power wireless sensor network nodes: (1) many analog signal components such as capacitors, operational amplifiers and resistors are used, which increases the energy consumption and operation of the circuit itself. (2) The battery is used for charging, which has defects such as limited charging life, poor high and low temperature performance, and serious environmental pollution; (3) The solar battery is connected to the charging control circuit, and stops operating after the battery is fully charged. Battery power supply, because the solar battery is in a state of non-operation at this time, so the solar energy is not used efficiently, and the energy management and control steps are lacking, which makes the power supply efficiency low

Method used

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  • Device and method for intelligently supplying power to node based on wireless sensor network
  • Device and method for intelligently supplying power to node based on wireless sensor network
  • Device and method for intelligently supplying power to node based on wireless sensor network

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Such as figure 1 As shown, it is a schematic diagram of the principle of the node intelligent power supply device. The node intelligent power supply device includes: a renewable energy battery 1, a supercapacitor energy storage circuit 3, and a charging control circuit 2 connected to the renewable energy battery 1 and the supercapacitor energy storage circuit 3 , the MCU (MicroControlUnit-micro control unit) microprocessor 4 and the power supply circuit 5 that are connected with the charging control circuit 2, and the power supply circuit 5 is connected with the renewable energy battery 1, the supercapacitor energy storage circuit 3 and the MCU microprocessor 4 . Wherein, the renewable energy battery 1 can be a solar battery, a vibration energy battery, a wind energy battery, a thermoelectric energy battery or other renewable resources obtained from the natural environment. In the present invention, the renewable energy battery 1 is a solar battery 1a as an example Be ...

Embodiment 2

[0057] The solar cell 1a comprises a miniature monocrystalline silicon solar panel; a miniature monocrystalline silicon solar panel is a semiconductor photodiode that can directly convert sunlight energy into electrical energy by the photovoltaic effect, and when the sun shines on the photodiode, the photoelectric The diode will convert the light energy of the sun into electric energy and generate current; the solar cell 1a collects solar energy and artificial light energy through the photoelectric effect and converts them into electric energy, and generates a voltage of about 5v under the control of the charging control circuit 2 through direct power supply technology priority The power supply circuit 5 is directly powered, and the supercapacitor energy storage circuit 3 is charged through the charging control circuit 2; when many solar cells 1a are connected in series or in parallel, it can become a solar cell array with relatively large output power.

[0058] Such as figur...

Embodiment 3

[0073] Such as Image 6 As shown, the method includes the following steps:

[0074] Step 1: MCU microprocessor 4 power-on initialization, and software and hardware initialization; simultaneously set the power supply voltage threshold value of the solar cell 1a (set to 4V here), and the first discharge voltage gate of the supercapacitor energy storage circuit 3 Limit (here set to 4V), the second discharge voltage threshold (here set to 3.5V) and the lowest discharge voltage threshold V D_th .

[0075] Step 2: the MCU microprocessor 4 collects the voltage value V of the solar battery 1a through the charging control circuit 2 S_IN And the voltage value V of the supercapacitor energy storage circuit 3 C_BAT ;

[0076] Step 3: MCU microprocessor 4 to the voltage value V of solar cell 1a S_IN And the voltage value V of the supercapacitor energy storage circuit 3 C_BAT Perform analog-to-digital conversion and voltage comparison processing, and generate power supply instructions...

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Abstract

The invention relates to a device and a method for intelligently supplying power to a node based on a wireless sensor network, which belongs to the technical field of low-energy consumption power supply of the node of the wireless sensor network, and aims to solve the problem that the energy supplies and management of the node are inconvenient because the distribution of the node in the field wireless sensor network is wide and the layout environment thereof is complicated. In the technical scheme of the invention, a MCU microprocessor selects the power supply mode of supplying power directly by a solar battery or releasing energy by a super capacitor by collecting external voltages and through internal comparison and judgment so as to intelligently control charging and power supply circuits, and control the node to enter different working modes according to the energy state so as to improve the efficiency of energy utilization. The device and the method of the invention can solve the intrinsic power supply problem of the nodes of the wireless sensor network, and extend the lifecycle of the whole wireless sensor network.

Description

technical field [0001] The invention relates to the technical field of low energy consumption power supply for nodes of a wireless sensor network, and specifically relates to a node intelligent power supply device and method using microprocessor control, direct power supply technology using renewable energy and supercapacitor energy storage elements. Background technique [0002] Due to the large number of wireless sensor network nodes, wide distribution areas and long-term deployment in unattended environmental areas, the environment in which it is located is complex, and it is not practical to replenish energy by replacing batteries. Therefore, effective energy-saving strategies must be adopted. Extend the lifetime of the network. Harvesting energy from the environment is an effective way to make sensor nodes work for a long time. At present, energy storage devices are mostly used to obtain energy such as solar energy, vibration energy, wind energy or temperature differen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J15/00
CPCY02E70/30Y02B60/50
Inventor 李道亮马道坤傅泽田温南楠位耀光丁启胜台海江
Owner CHINA AGRI UNIV
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