Siemens has recently achieved an important patent achievement in the field of wireless sensor technology, namely "energy harvesting circuit and energy harvesting method for wireless sensors".

1、 Basic Patent Information

Patent name: Energy harvesting circuit and energy harvesting method for wireless sensors

Public account: CN202410585192.0

Application date: May 2024

Applicant: Siemens (China) Co., Ltd

2、 Overview of Patent Content

This patent relates to an energy harvesting circuit and method for wireless sensors, with the main objective of providing long-lasting power support for wireless sensors through innovative energy harvesting technology. The circuit in the patent mainly includes the following key components:

Rectification circuit: used to convert collected AC power into DC power, which is the first step in energy harvesting and provides a foundation for subsequent energy storage and application.

The second storage capacitor is connected in parallel with the first storage capacitor through a voltage triggered switch, and its capacitance value is greater than that of the first capacitor. The design of the second storage capacitor allows for the transfer of electrical energy from the first storage capacitor to the second storage capacitor when the voltage triggered switch is closed, providing a more stable and durable electrical energy output.

Voltage triggered switch: connected between the first storage capacitor and the second storage capacitor, its working principle is to close when the voltage across the first storage capacitor is greater than the first threshold and open when it is less than the second threshold. This design ensures that electrical energy is transferred and stored at the appropriate time.

3、Advantages of patented technology

Efficient energy harvesting: The collected AC power is converted into DC power through a rectifier circuit, and energy is stored using a storage capacitor to improve the efficiency of energy harvesting.

Stable electrical energy output: By designing voltage triggered switches and second storage capacitors, the transfer and storage of electrical energy between different capacitors are achieved, providing more stable and durable electrical energy output.

Extending sensor lifespan: This energy harvesting circuit and method provide long-lasting power support for wireless sensors, reducing the frequency of battery or power replacement, thereby extending the sensor's lifespan.

4、Application scenarios

 Industrial automation and monitoring（Production line monitoring  Machine Condition Monitoring）

Environmental monitoring and protection（air quality monitoring wildlife conservation）

Smart Buildings and Home Furnishings（Intelligent Building Control  Smart home devices）

Agriculture and Irrigation（Soil moisture monitoring crop growth monitoring）

Remote monitoring and the Internet of Things（Remote Monitoring System IoT applications）

5、Application prospects

The successful application and application of this patent technology will provide strong technical support for the development of wireless sensor networks. Wireless sensors play an increasingly important role in fields such as the Internet of Things, industrial automation, and environmental monitoring. However, traditional battery powered methods have problems such as limited lifespan and difficulty in replacement. Siemens' patented energy harvesting technology provides a new and more reliable power supply for wireless sensors, which is expected to promote the further development and application of wireless sensor technology.

In summary, Siemens' patent achievement in the field of wireless sensor energy harvesting not only reflects the company's strength in technological innovation, but also provides new ideas and directions for the development and application of wireless sensor technology.