Sony harvests electromagnetic ‘noise’ and offers milliwatts
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Sony Semiconductor Solutions Corp. has developed an energy harvesting module that can make use of the electromagnetic wave “noise” found in industrial and office environments.
The module is able to harvest from several dozen microwatts to several dozen milliwatts of power, the company said.
The module uses the electromagnetic noise generated by electrical and electronic equipment in industrial environments and offices – such as robots inside factories and computer equipment and lighting within offices. It converts this with a claimed high-efficiency into electricity that can be used to power low-power sensors or to charge batteries.
Broadband electromagnetic noise is converted into useful energy sources for sensors. Source: Sony Semiconductor Solutions Corp.
The technology makes use of a novel antenna technology that uses the metal parts of “noisy” electronic equipment as part of the antenna and then uses a rectifier circuit with enhanced conversion efficiency, SSS said.
This allows it to convert electromagnetic wave noise across a broad specrum from several Hz up to 100MHz. This allows the module to supply power to low-power consumption IoT sensors and communications equipment, or to charge batteries.
The technology can be deployed in offices, retail stores, home and both indoors and outdoors. It can be also used as part of an energy monitoring network.
Because this technology continuously harvests electromagnetic wave noise from electronic devices, it can also identify the internal status of the electronic device by detecting changes in the harvested voltage. This means, for instance, that it can be used for applications such as detecting whether lighting is functioning normally or predicting device failure, for example in robots with built-in motors.
SSS said it is looking for partners from various industries to develop products based on the technology.
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