Unlock instant, AI-driven research and patent intelligence for your innovation.

Dynamic two-step gradient method for WSN active piezoelectric energy supply system

A piezoelectric energy supply system technology, applied in piezoelectric effect/electrostrictive or magnetostrictive motors, electrical components, generators/motors, etc., can solve the problems of inability to obtain optimal control voltage, dead cycle, long Time and other issues, to achieve performance improvement, improve energy efficiency, reduce the number of adjustments

Active Publication Date: 2017-05-31
南通艺顺鹏电气有限公司
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, we found in the research process that the two-step gradient method generally takes a long time to obtain the optimal control voltage, and in some cases, the optimal control voltage cannot be obtained, but it is repeatedly adjusted near the optimal voltage value , into an infinite loop

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Dynamic two-step gradient method for WSN active piezoelectric energy supply system
  • Dynamic two-step gradient method for WSN active piezoelectric energy supply system
  • Dynamic two-step gradient method for WSN active piezoelectric energy supply system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0049] 1.1. Piezoelectric effect

[0050] When some dielectrics are deformed by external forces in a certain direction, polarization will occur inside them, and at the same time, opposite charges will appear on its two opposite surfaces. When the external force is removed, it will return to the uncharged state. This phenomenon is called the positive piezoelectric effect.

[0051] 1.2. Piezoelectric system model

[0052] Tiny vibrations are ubiquitous in nature. Using the positive piezoelectric effect, the mechanical energy of the vibration can be converted into electrical energy, which is usually realized by a cantilever beam structure. Its model is as follows: figure 1 [18,19] shows:

[0053] It is composed of a fixed end, a piezoelectric sheet, a metal material, and a tip quality block. When the external environment vibrates, the tip mass will strain the cantilever beam under the action of vibration acceleration, and the piezoelectric sheet will vibrate accordingly, whic...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a dynamic two-step gradient method for a WSN active piezoelectric energy supply system. According to the method, a step value is dynamically adjusted, an effect according to which the step value is rapidly adjusted at an initial stage and is finely adjusted at a later stage can be achieved, and therefore, the stabilization time of the system can be shortened, calculation precision can be improved, and energy waste can be avoided.

Description

technical field [0001] The invention relates to the field of wireless sensor networks, in particular to a dynamic two-step gradient method for calculating an optimal control voltage for a WSN active piezoelectric energy supply system. Background technique [0002] With the development of wireless sensor network technology, its application in environmental monitoring, smart home, transportation, precision agriculture and other fields has gradually deepened, and power supply has always been a key issue in the application life and cost of wireless sensor network. Generally, wireless sensor networks are powered by batteries. Due to the limited life of ordinary batteries, in order to ensure the normal operation of wireless sensor networks, a large number of batteries need to be replaced regularly. In harsh environments or other occasions where humans cannot reach, battery replacement becomes difficult or even impossible. Therefore, people actively carry out research on new micro...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): H02N2/18
CPCH02N2/181
Inventor 郑国强李阳马华红王斐冀保峰吴红海袁德颖尚佳庆李济顺薛玉君张弓李颖娟
Owner 南通艺顺鹏电气有限公司