Sensor node power supply management circuit

Abstract

The invention discloses a sensor node power supply management circuit; the sensor node is powered by the energy collection technology; the power supply management circuit comprises a pre-stage energy storage module, a boost module, a rear-stage energy storage module, a control circuit module and an application circuit module; the pre-stage energy storage module is connected with the rear-stage energy storage module and the control circuit module input end through the boost module; the rear-stage energy storage module output end is connected with the control circuit module and the application circuit module input end; the control circuit module output end is connected with the application circuit module input end; the pre-stage energy storage module stores the collected environment energy as the boost module input power supply; the rear-stage energy storage module stores the boosted energy so as to provide energy for the control circuit module and the application circuit module; when two-end voltage of the rear-stage energy storage module changes in a set value scope, the control circuit module controls the application circuit module. The power supply management circuit can reasonably control collected energy to serve as the application circuit energy source, thus enabling the application circuit module to stably work.

Description

Technical field [0001] The present invention relates to a power management technology in the field of energy harvesting, and more specifically, to a power management circuit of a wireless sensor network node suitable for power supply by the energy harvesting technology. Background technique [0002] In most application scenarios, the terminal nodes of wireless sensor networks are powered by batteries, and the energy stored by the batteries is limited. It is not convenient to replace batteries or perform wired cable charging in most work situations of network nodes. Therefore, the energy shortage of nodes is caused by batteries. The problem needs an effective solution. [0003] Environmental energy harvesting technology is to collect environmental energy, such as solar energy, thermal energy, radio frequency energy, etc., and convert it into a usable DC power source. Therefore, environmental energy harvesting technology is used in the power supply and implantation of nodes in wirele...

AI Technical Summary

Problems solved by technology

[0004] Due to the influence of the application environment, such as the weak energy collected by solar energy in rainy days, the energy collected by radio frequency energy is weak due to the efficiency of the rectenna, and the energy harvesting technology cannot continuously and stably collect energy in the environment. Therefore, a power management circuit is designed It is very meaningful to make the collected energy continuously and stably provide power for subsequent circuits

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